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mac80211: move HT operation mode BSS info
[firewire-audio.git] / net / mac80211 / mlme.c
bloba1f2332a6fedbe38b9188f674907f89a0dbb38fd
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 sta_info *sta;
99 u32 changed = 0;
100 u16 ht_opmode;
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 /* HT is not supported */
107 if (!sband->ht_cap.ht_supported)
108 enable_ht = false;
109
110 /* check that channel matches the right operating channel */
111 if (local->hw.conf.channel->center_freq !=
112 ieee80211_channel_to_frequency(hti->control_chan))
113 enable_ht = false;
114
115 if (enable_ht) {
116 channel_type = NL80211_CHAN_HT20;
117
118 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
119 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
120 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
121 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
122 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
123 channel_type = NL80211_CHAN_HT40PLUS;
124 break;
125 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
126 channel_type = NL80211_CHAN_HT40MINUS;
127 break;
128 }
129 }
130 }
131
132 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
133 channel_type != local->hw.conf.channel_type;
134
135 local->oper_channel_type = channel_type;
136
137 if (ht_changed) {
138 /* channel_type change automatically detected */
139 ieee80211_hw_config(local, 0);
140
141 rcu_read_lock();
142
143 sta = sta_info_get(local, ifmgd->bssid);
144 if (sta)
145 rate_control_rate_update(local, sband, sta,
146 IEEE80211_RC_HT_CHANGED);
147
148 rcu_read_unlock();
149 }
150
151 /* disable HT */
152 if (!enable_ht)
153 return 0;
154
155 ht_opmode = le16_to_cpu(hti->operation_mode);
156
157 /* if bss configuration changed store the new one */
158 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
159 changed |= BSS_CHANGED_HT;
160 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
161 }
162
163 return changed;
164 }
165
166 /* frame sending functions */
167
168 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
169 {
170 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
171 struct ieee80211_local *local = sdata->local;
172 struct sk_buff *skb;
173 struct ieee80211_mgmt *mgmt;
174 u8 *pos, *ies, *ht_ie;
175 int i, len, count, rates_len, supp_rates_len;
176 u16 capab;
177 struct ieee80211_bss *bss;
178 int wmm = 0;
179 struct ieee80211_supported_band *sband;
180 u32 rates = 0;
181
182 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
183 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
184 ifmgd->ssid_len);
185 if (!skb) {
186 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
187 "frame\n", sdata->dev->name);
188 return;
189 }
190 skb_reserve(skb, local->hw.extra_tx_headroom);
191
192 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
193
194 capab = ifmgd->capab;
195
196 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
197 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
198 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
199 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
200 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
201 }
202
203 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
204 local->hw.conf.channel->center_freq,
205 ifmgd->ssid, ifmgd->ssid_len);
206 if (bss) {
207 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
208 capab |= WLAN_CAPABILITY_PRIVACY;
209 if (bss->wmm_used)
210 wmm = 1;
211
212 /* get all rates supported by the device and the AP as
213 * some APs don't like getting a superset of their rates
214 * in the association request (e.g. D-Link DAP 1353 in
215 * b-only mode) */
216 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
217
218 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
219 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
220 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
221
222 ieee80211_rx_bss_put(local, bss);
223 } else {
224 rates = ~0;
225 rates_len = sband->n_bitrates;
226 }
227
228 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
229 memset(mgmt, 0, 24);
230 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
231 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
232 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
233
234 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
235 skb_put(skb, 10);
236 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
237 IEEE80211_STYPE_REASSOC_REQ);
238 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
239 mgmt->u.reassoc_req.listen_interval =
240 cpu_to_le16(local->hw.conf.listen_interval);
241 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
242 ETH_ALEN);
243 } else {
244 skb_put(skb, 4);
245 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
246 IEEE80211_STYPE_ASSOC_REQ);
247 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
248 mgmt->u.assoc_req.listen_interval =
249 cpu_to_le16(local->hw.conf.listen_interval);
250 }
251
252 /* SSID */
253 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
254 *pos++ = WLAN_EID_SSID;
255 *pos++ = ifmgd->ssid_len;
256 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
257
258 /* add all rates which were marked to be used above */
259 supp_rates_len = rates_len;
260 if (supp_rates_len > 8)
261 supp_rates_len = 8;
262
263 len = sband->n_bitrates;
264 pos = skb_put(skb, supp_rates_len + 2);
265 *pos++ = WLAN_EID_SUPP_RATES;
266 *pos++ = supp_rates_len;
267
268 count = 0;
269 for (i = 0; i < sband->n_bitrates; i++) {
270 if (BIT(i) & rates) {
271 int rate = sband->bitrates[i].bitrate;
272 *pos++ = (u8) (rate / 5);
273 if (++count == 8)
274 break;
275 }
276 }
277
278 if (rates_len > count) {
279 pos = skb_put(skb, rates_len - count + 2);
280 *pos++ = WLAN_EID_EXT_SUPP_RATES;
281 *pos++ = rates_len - count;
282
283 for (i++; i < sband->n_bitrates; i++) {
284 if (BIT(i) & rates) {
285 int rate = sband->bitrates[i].bitrate;
286 *pos++ = (u8) (rate / 5);
287 }
288 }
289 }
290
291 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
292 /* 1. power capabilities */
293 pos = skb_put(skb, 4);
294 *pos++ = WLAN_EID_PWR_CAPABILITY;
295 *pos++ = 2;
296 *pos++ = 0; /* min tx power */
297 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
298
299 /* 2. supported channels */
300 /* TODO: get this in reg domain format */
301 pos = skb_put(skb, 2 * sband->n_channels + 2);
302 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
303 *pos++ = 2 * sband->n_channels;
304 for (i = 0; i < sband->n_channels; i++) {
305 *pos++ = ieee80211_frequency_to_channel(
306 sband->channels[i].center_freq);
307 *pos++ = 1; /* one channel in the subband*/
308 }
309 }
310
311 if (ifmgd->extra_ie) {
312 pos = skb_put(skb, ifmgd->extra_ie_len);
313 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
314 }
315
316 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
317 pos = skb_put(skb, 9);
318 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
319 *pos++ = 7; /* len */
320 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
321 *pos++ = 0x50;
322 *pos++ = 0xf2;
323 *pos++ = 2; /* WME */
324 *pos++ = 0; /* WME info */
325 *pos++ = 1; /* WME ver */
326 *pos++ = 0;
327 }
328
329 /* wmm support is a must to HT */
330 /*
331 * IEEE802.11n does not allow TKIP/WEP as pairwise
332 * ciphers in HT mode. We still associate in non-ht
333 * mode (11a/b/g) if any one of these ciphers is
334 * configured as pairwise.
335 */
336 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
337 sband->ht_cap.ht_supported &&
338 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
339 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
340 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
341 struct ieee80211_ht_info *ht_info =
342 (struct ieee80211_ht_info *)(ht_ie + 2);
343 u16 cap = sband->ht_cap.cap;
344 __le16 tmp;
345 u32 flags = local->hw.conf.channel->flags;
346
347 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
348 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
349 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
350 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
351 cap &= ~IEEE80211_HT_CAP_SGI_40;
352 }
353 break;
354 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
355 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
356 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
357 cap &= ~IEEE80211_HT_CAP_SGI_40;
358 }
359 break;
360 }
361
362 tmp = cpu_to_le16(cap);
363 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
364 *pos++ = WLAN_EID_HT_CAPABILITY;
365 *pos++ = sizeof(struct ieee80211_ht_cap);
366 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
367 memcpy(pos, &tmp, sizeof(u16));
368 pos += sizeof(u16);
369 /* TODO: needs a define here for << 2 */
370 *pos++ = sband->ht_cap.ampdu_factor |
371 (sband->ht_cap.ampdu_density << 2);
372 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
373 }
374
375 kfree(ifmgd->assocreq_ies);
376 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
377 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
378 if (ifmgd->assocreq_ies)
379 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
380
381 ieee80211_tx_skb(sdata, skb, 0);
382 }
383
384
385 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
386 u16 stype, u16 reason)
387 {
388 struct ieee80211_local *local = sdata->local;
389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
390 struct sk_buff *skb;
391 struct ieee80211_mgmt *mgmt;
392
393 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
394 if (!skb) {
395 printk(KERN_DEBUG "%s: failed to allocate buffer for "
396 "deauth/disassoc frame\n", sdata->dev->name);
397 return;
398 }
399 skb_reserve(skb, local->hw.extra_tx_headroom);
400
401 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
402 memset(mgmt, 0, 24);
403 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
404 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
405 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
406 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
407 skb_put(skb, 2);
408 /* u.deauth.reason_code == u.disassoc.reason_code */
409 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
410
411 if (stype == IEEE80211_STYPE_DEAUTH)
412 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
413 else
414 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
415 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
416 }
417
418 void ieee80211_send_pspoll(struct ieee80211_local *local,
419 struct ieee80211_sub_if_data *sdata)
420 {
421 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
422 struct ieee80211_pspoll *pspoll;
423 struct sk_buff *skb;
424 u16 fc;
425
426 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
427 if (!skb) {
428 printk(KERN_DEBUG "%s: failed to allocate buffer for "
429 "pspoll frame\n", sdata->dev->name);
430 return;
431 }
432 skb_reserve(skb, local->hw.extra_tx_headroom);
433
434 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
435 memset(pspoll, 0, sizeof(*pspoll));
436 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
437 pspoll->frame_control = cpu_to_le16(fc);
438 pspoll->aid = cpu_to_le16(ifmgd->aid);
439
440 /* aid in PS-Poll has its two MSBs each set to 1 */
441 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
442
443 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
444 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
445
446 ieee80211_tx_skb(sdata, skb, 0);
447 }
448
449 void ieee80211_send_nullfunc(struct ieee80211_local *local,
450 struct ieee80211_sub_if_data *sdata,
451 int powersave)
452 {
453 struct sk_buff *skb;
454 struct ieee80211_hdr *nullfunc;
455 __le16 fc;
456
457 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
458 return;
459
460 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
461 if (!skb) {
462 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
463 "frame\n", sdata->dev->name);
464 return;
465 }
466 skb_reserve(skb, local->hw.extra_tx_headroom);
467
468 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
469 memset(nullfunc, 0, 24);
470 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
471 IEEE80211_FCTL_TODS);
472 if (powersave)
473 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
474 nullfunc->frame_control = fc;
475 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
476 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
477 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
478
479 ieee80211_tx_skb(sdata, skb, 0);
480 }
481
482 /* powersave */
483 static void ieee80211_enable_ps(struct ieee80211_local *local,
484 struct ieee80211_sub_if_data *sdata)
485 {
486 struct ieee80211_conf *conf = &local->hw.conf;
487
488 /*
489 * If we are scanning right now then the parameters will
490 * take effect when scan finishes.
491 */
492 if (local->hw_scanning || local->sw_scanning)
493 return;
494
495 if (conf->dynamic_ps_timeout > 0 &&
496 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
497 mod_timer(&local->dynamic_ps_timer, jiffies +
498 msecs_to_jiffies(conf->dynamic_ps_timeout));
499 } else {
500 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
501 ieee80211_send_nullfunc(local, sdata, 1);
502 conf->flags |= IEEE80211_CONF_PS;
503 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
504 }
505 }
506
507 static void ieee80211_change_ps(struct ieee80211_local *local)
508 {
509 struct ieee80211_conf *conf = &local->hw.conf;
510
511 if (local->ps_sdata) {
512 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
513 return;
514
515 ieee80211_enable_ps(local, local->ps_sdata);
516 } else if (conf->flags & IEEE80211_CONF_PS) {
517 conf->flags &= ~IEEE80211_CONF_PS;
518 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
519 del_timer_sync(&local->dynamic_ps_timer);
520 cancel_work_sync(&local->dynamic_ps_enable_work);
521 }
522 }
523
524 /* need to hold RTNL or interface lock */
525 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
526 {
527 struct ieee80211_sub_if_data *sdata, *found = NULL;
528 int count = 0;
529
530 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
531 local->ps_sdata = NULL;
532 return;
533 }
534
535 list_for_each_entry(sdata, &local->interfaces, list) {
536 if (!netif_running(sdata->dev))
537 continue;
538 if (sdata->vif.type != NL80211_IFTYPE_STATION)
539 continue;
540 found = sdata;
541 count++;
542 }
543
544 if (count == 1 && found->u.mgd.powersave) {
545 s32 beaconint_us;
546
547 if (latency < 0)
548 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
549
550 beaconint_us = ieee80211_tu_to_usec(
551 found->vif.bss_conf.beacon_int);
552
553 if (beaconint_us > latency) {
554 local->ps_sdata = NULL;
555 } else {
556 u8 dtimper = found->vif.bss_conf.dtim_period;
557 int maxslp = 1;
558
559 if (dtimper > 1)
560 maxslp = min_t(int, dtimper,
561 latency / beaconint_us);
562
563 local->hw.conf.max_sleep_period = maxslp;
564 local->ps_sdata = found;
565 }
566 } else {
567 local->ps_sdata = NULL;
568 }
569
570 ieee80211_change_ps(local);
571 }
572
573 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
574 {
575 struct ieee80211_local *local =
576 container_of(work, struct ieee80211_local,
577 dynamic_ps_disable_work);
578
579 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
580 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
581 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
582 }
583
584 ieee80211_wake_queues_by_reason(&local->hw,
585 IEEE80211_QUEUE_STOP_REASON_PS);
586 }
587
588 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
589 {
590 struct ieee80211_local *local =
591 container_of(work, struct ieee80211_local,
592 dynamic_ps_enable_work);
593 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
594
595 /* can only happen when PS was just disabled anyway */
596 if (!sdata)
597 return;
598
599 if (local->hw.conf.flags & IEEE80211_CONF_PS)
600 return;
601
602 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
603 ieee80211_send_nullfunc(local, sdata, 1);
604
605 local->hw.conf.flags |= IEEE80211_CONF_PS;
606 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
607 }
608
609 void ieee80211_dynamic_ps_timer(unsigned long data)
610 {
611 struct ieee80211_local *local = (void *) data;
612
613 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
614 }
615
616 /* MLME */
617 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
618 struct ieee80211_if_managed *ifmgd,
619 u8 *wmm_param, size_t wmm_param_len)
620 {
621 struct ieee80211_tx_queue_params params;
622 size_t left;
623 int count;
624 u8 *pos;
625
626 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
627 return;
628
629 if (!wmm_param)
630 return;
631
632 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
633 return;
634 count = wmm_param[6] & 0x0f;
635 if (count == ifmgd->wmm_last_param_set)
636 return;
637 ifmgd->wmm_last_param_set = count;
638
639 pos = wmm_param + 8;
640 left = wmm_param_len - 8;
641
642 memset(&params, 0, sizeof(params));
643
644 local->wmm_acm = 0;
645 for (; left >= 4; left -= 4, pos += 4) {
646 int aci = (pos[0] >> 5) & 0x03;
647 int acm = (pos[0] >> 4) & 0x01;
648 int queue;
649
650 switch (aci) {
651 case 1: /* AC_BK */
652 queue = 3;
653 if (acm)
654 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
655 break;
656 case 2: /* AC_VI */
657 queue = 1;
658 if (acm)
659 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
660 break;
661 case 3: /* AC_VO */
662 queue = 0;
663 if (acm)
664 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
665 break;
666 case 0: /* AC_BE */
667 default:
668 queue = 2;
669 if (acm)
670 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
671 break;
672 }
673
674 params.aifs = pos[0] & 0x0f;
675 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
676 params.cw_min = ecw2cw(pos[1] & 0x0f);
677 params.txop = get_unaligned_le16(pos + 2);
678 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
679 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
680 "cWmin=%d cWmax=%d txop=%d\n",
681 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
682 params.cw_max, params.txop);
683 #endif
684 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
685 printk(KERN_DEBUG "%s: failed to set TX queue "
686 "parameters for queue %d\n", local->mdev->name,
687 queue);
688 }
689 }
690
691 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
692 u16 capab, bool erp_valid, u8 erp)
693 {
694 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
695 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
696 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
697 #endif
698 u32 changed = 0;
699 bool use_protection;
700 bool use_short_preamble;
701 bool use_short_slot;
702
703 if (erp_valid) {
704 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
705 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
706 } else {
707 use_protection = false;
708 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
709 }
710
711 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
712
713 if (use_protection != bss_conf->use_cts_prot) {
714 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
715 if (net_ratelimit()) {
716 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
717 sdata->dev->name,
718 use_protection ? "enabled" : "disabled",
719 ifmgd->bssid);
720 }
721 #endif
722 bss_conf->use_cts_prot = use_protection;
723 changed |= BSS_CHANGED_ERP_CTS_PROT;
724 }
725
726 if (use_short_preamble != bss_conf->use_short_preamble) {
727 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
728 if (net_ratelimit()) {
729 printk(KERN_DEBUG "%s: switched to %s barker preamble"
730 " (BSSID=%pM)\n",
731 sdata->dev->name,
732 use_short_preamble ? "short" : "long",
733 ifmgd->bssid);
734 }
735 #endif
736 bss_conf->use_short_preamble = use_short_preamble;
737 changed |= BSS_CHANGED_ERP_PREAMBLE;
738 }
739
740 if (use_short_slot != bss_conf->use_short_slot) {
741 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
742 if (net_ratelimit()) {
743 printk(KERN_DEBUG "%s: switched to %s slot time"
744 " (BSSID=%pM)\n",
745 sdata->dev->name,
746 use_short_slot ? "short" : "long",
747 ifmgd->bssid);
748 }
749 #endif
750 bss_conf->use_short_slot = use_short_slot;
751 changed |= BSS_CHANGED_ERP_SLOT;
752 }
753
754 return changed;
755 }
756
757 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
758 {
759 union iwreq_data wrqu;
760
761 memset(&wrqu, 0, sizeof(wrqu));
762 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
763 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
764 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
765 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
766 }
767
768 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
769 {
770 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
771 char *buf;
772 size_t len;
773 int i;
774 union iwreq_data wrqu;
775
776 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
777 return;
778
779 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
780 ifmgd->assocresp_ies_len), GFP_KERNEL);
781 if (!buf)
782 return;
783
784 len = sprintf(buf, "ASSOCINFO(");
785 if (ifmgd->assocreq_ies) {
786 len += sprintf(buf + len, "ReqIEs=");
787 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
788 len += sprintf(buf + len, "%02x",
789 ifmgd->assocreq_ies[i]);
790 }
791 }
792 if (ifmgd->assocresp_ies) {
793 if (ifmgd->assocreq_ies)
794 len += sprintf(buf + len, " ");
795 len += sprintf(buf + len, "RespIEs=");
796 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
797 len += sprintf(buf + len, "%02x",
798 ifmgd->assocresp_ies[i]);
799 }
800 }
801 len += sprintf(buf + len, ")");
802
803 if (len > IW_CUSTOM_MAX) {
804 len = sprintf(buf, "ASSOCRESPIE=");
805 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
806 len += sprintf(buf + len, "%02x",
807 ifmgd->assocresp_ies[i]);
808 }
809 }
810
811 if (len <= IW_CUSTOM_MAX) {
812 memset(&wrqu, 0, sizeof(wrqu));
813 wrqu.data.length = len;
814 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
815 }
816
817 kfree(buf);
818 }
819
820
821 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
822 u32 bss_info_changed)
823 {
824 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
825 struct ieee80211_local *local = sdata->local;
826 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
827
828 struct ieee80211_bss *bss;
829
830 bss_info_changed |= BSS_CHANGED_ASSOC;
831 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
832
833 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
834 conf->channel->center_freq,
835 ifmgd->ssid, ifmgd->ssid_len);
836 if (bss) {
837 /* set timing information */
838 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
839 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
840 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
841
842 bss_info_changed |= BSS_CHANGED_BEACON_INT;
843 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
844 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
845
846 cfg80211_hold_bss(&bss->cbss);
847
848 ieee80211_rx_bss_put(local, bss);
849 }
850
851 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
852 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
853 ieee80211_sta_send_associnfo(sdata);
854
855 ifmgd->last_probe = jiffies;
856 ieee80211_led_assoc(local, 1);
857
858 sdata->vif.bss_conf.assoc = 1;
859 /*
860 * For now just always ask the driver to update the basic rateset
861 * when we have associated, we aren't checking whether it actually
862 * changed or not.
863 */
864 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
865 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
866
867 /* will be same as sdata */
868 if (local->ps_sdata) {
869 mutex_lock(&local->iflist_mtx);
870 ieee80211_recalc_ps(local, -1);
871 mutex_unlock(&local->iflist_mtx);
872 }
873
874 netif_tx_start_all_queues(sdata->dev);
875 netif_carrier_on(sdata->dev);
876
877 ieee80211_sta_send_apinfo(sdata);
878 }
879
880 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
881 {
882 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
883 struct ieee80211_local *local = sdata->local;
884
885 ifmgd->direct_probe_tries++;
886 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
887 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
888 sdata->dev->name, ifmgd->bssid);
889 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
890 ieee80211_recalc_idle(local);
891 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
892
893 /*
894 * Most likely AP is not in the range so remove the
895 * bss information associated to the AP
896 */
897 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
898 sdata->local->hw.conf.channel->center_freq,
899 ifmgd->ssid, ifmgd->ssid_len);
900
901 /*
902 * We might have a pending scan which had no chance to run yet
903 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
904 * Hence, queue the STAs work again
905 */
906 queue_work(local->hw.workqueue, &ifmgd->work);
907 return;
908 }
909
910 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
911 sdata->dev->name, ifmgd->bssid,
912 ifmgd->direct_probe_tries);
913
914 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
915
916 /* Direct probe is sent to broadcast address as some APs
917 * will not answer to direct packet in unassociated state.
918 */
919 ieee80211_send_probe_req(sdata, NULL,
920 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
921
922 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
923 }
924
925
926 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
927 {
928 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
929 struct ieee80211_local *local = sdata->local;
930 u8 *ies;
931 size_t ies_len;
932
933 ifmgd->auth_tries++;
934 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
935 printk(KERN_DEBUG "%s: authentication with AP %pM"
936 " timed out\n",
937 sdata->dev->name, ifmgd->bssid);
938 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
939 ieee80211_recalc_idle(local);
940 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
941 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
942 sdata->local->hw.conf.channel->center_freq,
943 ifmgd->ssid, ifmgd->ssid_len);
944
945 /*
946 * We might have a pending scan which had no chance to run yet
947 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
948 * Hence, queue the STAs work again
949 */
950 queue_work(local->hw.workqueue, &ifmgd->work);
951 return;
952 }
953
954 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
955 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
956 sdata->dev->name, ifmgd->bssid);
957
958 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
959 ies = ifmgd->sme_auth_ie;
960 ies_len = ifmgd->sme_auth_ie_len;
961 } else {
962 ies = NULL;
963 ies_len = 0;
964 }
965 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
966 ifmgd->bssid, 0);
967 ifmgd->auth_transaction = 2;
968
969 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
970 }
971
972 /*
973 * The disassoc 'reason' argument can be either our own reason
974 * if self disconnected or a reason code from the AP.
975 */
976 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
977 bool deauth, bool self_disconnected,
978 u16 reason)
979 {
980 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
981 struct ieee80211_local *local = sdata->local;
982 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
983 struct ieee80211_bss *bss;
984 struct sta_info *sta;
985 u32 changed = 0, config_changed = 0;
986
987 rcu_read_lock();
988
989 sta = sta_info_get(local, ifmgd->bssid);
990 if (!sta) {
991 rcu_read_unlock();
992 return;
993 }
994
995 if (deauth) {
996 ifmgd->direct_probe_tries = 0;
997 ifmgd->auth_tries = 0;
998 }
999 ifmgd->assoc_scan_tries = 0;
1000 ifmgd->assoc_tries = 0;
1001
1002 netif_tx_stop_all_queues(sdata->dev);
1003 netif_carrier_off(sdata->dev);
1004
1005 ieee80211_sta_tear_down_BA_sessions(sta);
1006
1007 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1008 conf->channel->center_freq,
1009 ifmgd->ssid, ifmgd->ssid_len);
1010
1011 if (bss) {
1012 cfg80211_unhold_bss(&bss->cbss);
1013 ieee80211_rx_bss_put(local, bss);
1014 }
1015
1016 if (self_disconnected) {
1017 if (deauth)
1018 ieee80211_send_deauth_disassoc(sdata,
1019 IEEE80211_STYPE_DEAUTH, reason);
1020 else
1021 ieee80211_send_deauth_disassoc(sdata,
1022 IEEE80211_STYPE_DISASSOC, reason);
1023 }
1024
1025 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1026 changed |= ieee80211_reset_erp_info(sdata);
1027
1028 ieee80211_led_assoc(local, 0);
1029 changed |= BSS_CHANGED_ASSOC;
1030 sdata->vif.bss_conf.assoc = false;
1031
1032 ieee80211_sta_send_apinfo(sdata);
1033
1034 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1035 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1036 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1037 sdata->local->hw.conf.channel->center_freq,
1038 ifmgd->ssid, ifmgd->ssid_len);
1039 }
1040
1041 rcu_read_unlock();
1042
1043 ieee80211_set_wmm_default(sdata);
1044
1045 ieee80211_recalc_idle(local);
1046
1047 /* channel(_type) changes are handled by ieee80211_hw_config */
1048 local->oper_channel_type = NL80211_CHAN_NO_HT;
1049
1050 local->power_constr_level = 0;
1051
1052 del_timer_sync(&local->dynamic_ps_timer);
1053 cancel_work_sync(&local->dynamic_ps_enable_work);
1054
1055 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1056 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1057 config_changed |= IEEE80211_CONF_CHANGE_PS;
1058 }
1059
1060 ieee80211_hw_config(local, config_changed);
1061 ieee80211_bss_info_change_notify(sdata, changed);
1062
1063 rcu_read_lock();
1064
1065 sta = sta_info_get(local, ifmgd->bssid);
1066 if (!sta) {
1067 rcu_read_unlock();
1068 return;
1069 }
1070
1071 sta_info_unlink(&sta);
1072
1073 rcu_read_unlock();
1074
1075 sta_info_destroy(sta);
1076 }
1077
1078 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1079 {
1080 if (!sdata || !sdata->default_key ||
1081 sdata->default_key->conf.alg != ALG_WEP)
1082 return 0;
1083 return 1;
1084 }
1085
1086 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1087 {
1088 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1089 struct ieee80211_local *local = sdata->local;
1090 struct ieee80211_bss *bss;
1091 int bss_privacy;
1092 int wep_privacy;
1093 int privacy_invoked;
1094
1095 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1096 return 0;
1097
1098 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1099 local->hw.conf.channel->center_freq,
1100 ifmgd->ssid, ifmgd->ssid_len);
1101 if (!bss)
1102 return 0;
1103
1104 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1105 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1106 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1107
1108 ieee80211_rx_bss_put(local, bss);
1109
1110 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1111 return 0;
1112
1113 return 1;
1114 }
1115
1116 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1117 {
1118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1119 struct ieee80211_local *local = sdata->local;
1120
1121 ifmgd->assoc_tries++;
1122 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1123 printk(KERN_DEBUG "%s: association with AP %pM"
1124 " timed out\n",
1125 sdata->dev->name, ifmgd->bssid);
1126 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1127 ieee80211_recalc_idle(local);
1128 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1129 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1130 sdata->local->hw.conf.channel->center_freq,
1131 ifmgd->ssid, ifmgd->ssid_len);
1132 /*
1133 * We might have a pending scan which had no chance to run yet
1134 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1135 * Hence, queue the STAs work again
1136 */
1137 queue_work(local->hw.workqueue, &ifmgd->work);
1138 return;
1139 }
1140
1141 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1142 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1143 sdata->dev->name, ifmgd->bssid);
1144 if (ieee80211_privacy_mismatch(sdata)) {
1145 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1146 "mixed-cell disabled - abort association\n", sdata->dev->name);
1147 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1148 ieee80211_recalc_idle(local);
1149 return;
1150 }
1151
1152 ieee80211_send_assoc(sdata);
1153
1154 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1155 }
1156
1157 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1158 struct ieee80211_hdr *hdr)
1159 {
1160 /*
1161 * We can postpone the mgd.timer whenever receiving unicast frames
1162 * from AP because we know that the connection is working both ways
1163 * at that time. But multicast frames (and hence also beacons) must
1164 * be ignored here, because we need to trigger the timer during
1165 * data idle periods for sending the periodical probe request to
1166 * the AP.
1167 */
1168 if (!is_multicast_ether_addr(hdr->addr1))
1169 mod_timer(&sdata->u.mgd.timer,
1170 jiffies + IEEE80211_MONITORING_INTERVAL);
1171 }
1172
1173 void ieee80211_beacon_loss_work(struct work_struct *work)
1174 {
1175 struct ieee80211_sub_if_data *sdata =
1176 container_of(work, struct ieee80211_sub_if_data,
1177 u.mgd.beacon_loss_work);
1178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1179
1180 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1181 if (net_ratelimit()) {
1182 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1183 "- sending probe request\n", sdata->dev->name,
1184 sdata->u.mgd.bssid);
1185 }
1186 #endif
1187
1188 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1189 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1190 ifmgd->ssid_len, NULL, 0);
1191
1192 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
1193 }
1194
1195 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1196 {
1197 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1198
1199 queue_work(sdata->local->hw.workqueue,
1200 &sdata->u.mgd.beacon_loss_work);
1201 }
1202 EXPORT_SYMBOL(ieee80211_beacon_loss);
1203
1204 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1205 {
1206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1207 struct ieee80211_local *local = sdata->local;
1208 struct sta_info *sta;
1209 bool disassoc = false;
1210
1211 /* TODO: start monitoring current AP signal quality and number of
1212 * missed beacons. Scan other channels every now and then and search
1213 * for better APs. */
1214 /* TODO: remove expired BSSes */
1215
1216 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1217
1218 rcu_read_lock();
1219
1220 sta = sta_info_get(local, ifmgd->bssid);
1221 if (!sta) {
1222 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1223 sdata->dev->name, ifmgd->bssid);
1224 disassoc = true;
1225 goto unlock;
1226 }
1227
1228 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1229 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1230 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1231 "- disassociating\n",
1232 sdata->dev->name, ifmgd->bssid);
1233 disassoc = true;
1234 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1235 goto unlock;
1236 }
1237
1238 /*
1239 * Beacon filtering is only enabled with power save and then the
1240 * stack should not check for beacon loss.
1241 */
1242 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1243 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1244 time_after(jiffies,
1245 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1246 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1247 if (net_ratelimit()) {
1248 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1249 "- sending probe request\n",
1250 sdata->dev->name, ifmgd->bssid);
1251 }
1252 #endif
1253 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1254 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1255 ifmgd->ssid_len, NULL, 0);
1256 goto unlock;
1257
1258 }
1259
1260 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1261 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1262 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1263 ifmgd->ssid_len, NULL, 0);
1264 }
1265
1266 unlock:
1267 rcu_read_unlock();
1268
1269 if (disassoc)
1270 ieee80211_set_disassoc(sdata, true, true,
1271 WLAN_REASON_PREV_AUTH_NOT_VALID);
1272 else
1273 mod_timer(&ifmgd->timer, jiffies +
1274 IEEE80211_MONITORING_INTERVAL);
1275 }
1276
1277
1278 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1279 {
1280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1281
1282 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1283 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1284 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1285 /* Wait for SME to request association */
1286 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1287 ieee80211_recalc_idle(sdata->local);
1288 } else
1289 ieee80211_associate(sdata);
1290 }
1291
1292
1293 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1294 struct ieee80211_mgmt *mgmt,
1295 size_t len)
1296 {
1297 u8 *pos;
1298 struct ieee802_11_elems elems;
1299
1300 pos = mgmt->u.auth.variable;
1301 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1302 if (!elems.challenge)
1303 return;
1304 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1305 elems.challenge - 2, elems.challenge_len + 2,
1306 sdata->u.mgd.bssid, 1);
1307 sdata->u.mgd.auth_transaction = 4;
1308 }
1309
1310 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1311 struct ieee80211_mgmt *mgmt,
1312 size_t len)
1313 {
1314 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1315 u16 auth_alg, auth_transaction, status_code;
1316
1317 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1318 return;
1319
1320 if (len < 24 + 6)
1321 return;
1322
1323 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1324 return;
1325
1326 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1327 return;
1328
1329 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1330 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1331 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1332
1333 if (auth_alg != ifmgd->auth_alg ||
1334 auth_transaction != ifmgd->auth_transaction)
1335 return;
1336
1337 if (status_code != WLAN_STATUS_SUCCESS) {
1338 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1339 u8 algs[3];
1340 const int num_algs = ARRAY_SIZE(algs);
1341 int i, pos;
1342 algs[0] = algs[1] = algs[2] = 0xff;
1343 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1344 algs[0] = WLAN_AUTH_OPEN;
1345 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1346 algs[1] = WLAN_AUTH_SHARED_KEY;
1347 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1348 algs[2] = WLAN_AUTH_LEAP;
1349 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1350 pos = 0;
1351 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1352 pos = 1;
1353 else
1354 pos = 2;
1355 for (i = 0; i < num_algs; i++) {
1356 pos++;
1357 if (pos >= num_algs)
1358 pos = 0;
1359 if (algs[pos] == ifmgd->auth_alg ||
1360 algs[pos] == 0xff)
1361 continue;
1362 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1363 !ieee80211_sta_wep_configured(sdata))
1364 continue;
1365 ifmgd->auth_alg = algs[pos];
1366 break;
1367 }
1368 }
1369 return;
1370 }
1371
1372 switch (ifmgd->auth_alg) {
1373 case WLAN_AUTH_OPEN:
1374 case WLAN_AUTH_LEAP:
1375 case WLAN_AUTH_FT:
1376 ieee80211_auth_completed(sdata);
1377 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1378 break;
1379 case WLAN_AUTH_SHARED_KEY:
1380 if (ifmgd->auth_transaction == 4) {
1381 ieee80211_auth_completed(sdata);
1382 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1383 } else
1384 ieee80211_auth_challenge(sdata, mgmt, len);
1385 break;
1386 }
1387 }
1388
1389
1390 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1391 struct ieee80211_mgmt *mgmt,
1392 size_t len)
1393 {
1394 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1395 u16 reason_code;
1396
1397 if (len < 24 + 2)
1398 return;
1399
1400 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1401 return;
1402
1403 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1404
1405 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1406 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1407 sdata->dev->name, reason_code);
1408
1409 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1410 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1411 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1412 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1413 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1414 mod_timer(&ifmgd->timer, jiffies +
1415 IEEE80211_RETRY_AUTH_INTERVAL);
1416 }
1417
1418 ieee80211_set_disassoc(sdata, true, false, 0);
1419 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1420 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1421 }
1422
1423
1424 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1425 struct ieee80211_mgmt *mgmt,
1426 size_t len)
1427 {
1428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1429 u16 reason_code;
1430
1431 if (len < 24 + 2)
1432 return;
1433
1434 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1435 return;
1436
1437 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1438
1439 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1440 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1441 sdata->dev->name, reason_code);
1442
1443 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1444 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1445 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1446 mod_timer(&ifmgd->timer, jiffies +
1447 IEEE80211_RETRY_AUTH_INTERVAL);
1448 }
1449
1450 ieee80211_set_disassoc(sdata, false, false, reason_code);
1451 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1452 }
1453
1454
1455 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1456 struct ieee80211_mgmt *mgmt,
1457 size_t len,
1458 int reassoc)
1459 {
1460 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1461 struct ieee80211_local *local = sdata->local;
1462 struct ieee80211_supported_band *sband;
1463 struct sta_info *sta;
1464 u32 rates, basic_rates;
1465 u16 capab_info, status_code, aid;
1466 struct ieee802_11_elems elems;
1467 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1468 u8 *pos;
1469 u32 changed = 0;
1470 int i, j;
1471 bool have_higher_than_11mbit = false, newsta = false;
1472 u16 ap_ht_cap_flags;
1473
1474 /* AssocResp and ReassocResp have identical structure, so process both
1475 * of them in this function. */
1476
1477 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1478 return;
1479
1480 if (len < 24 + 6)
1481 return;
1482
1483 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1484 return;
1485
1486 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1487 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1488 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1489
1490 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1491 "status=%d aid=%d)\n",
1492 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1493 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1494
1495 pos = mgmt->u.assoc_resp.variable;
1496 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1497
1498 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1499 elems.timeout_int && elems.timeout_int_len == 5 &&
1500 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1501 u32 tu, ms;
1502 tu = get_unaligned_le32(elems.timeout_int + 1);
1503 ms = tu * 1024 / 1000;
1504 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1505 "comeback duration %u TU (%u ms)\n",
1506 sdata->dev->name, tu, ms);
1507 if (ms > IEEE80211_ASSOC_TIMEOUT)
1508 mod_timer(&ifmgd->timer,
1509 jiffies + msecs_to_jiffies(ms));
1510 return;
1511 }
1512
1513 if (status_code != WLAN_STATUS_SUCCESS) {
1514 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1515 sdata->dev->name, status_code);
1516 /* if this was a reassociation, ensure we try a "full"
1517 * association next time. This works around some broken APs
1518 * which do not correctly reject reassociation requests. */
1519 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1520 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1521 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1522 /* Wait for SME to decide what to do next */
1523 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1524 ieee80211_recalc_idle(local);
1525 }
1526 return;
1527 }
1528
1529 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1530 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1531 "set\n", sdata->dev->name, aid);
1532 aid &= ~(BIT(15) | BIT(14));
1533
1534 if (!elems.supp_rates) {
1535 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1536 sdata->dev->name);
1537 return;
1538 }
1539
1540 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1541 ifmgd->aid = aid;
1542 ifmgd->ap_capab = capab_info;
1543
1544 kfree(ifmgd->assocresp_ies);
1545 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1546 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1547 if (ifmgd->assocresp_ies)
1548 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1549
1550 rcu_read_lock();
1551
1552 /* Add STA entry for the AP */
1553 sta = sta_info_get(local, ifmgd->bssid);
1554 if (!sta) {
1555 newsta = true;
1556
1557 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1558 if (!sta) {
1559 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1560 " the AP\n", sdata->dev->name);
1561 rcu_read_unlock();
1562 return;
1563 }
1564
1565 /* update new sta with its last rx activity */
1566 sta->last_rx = jiffies;
1567 }
1568
1569 /*
1570 * FIXME: Do we really need to update the sta_info's information here?
1571 * We already know about the AP (we found it in our list) so it
1572 * should already be filled with the right info, no?
1573 * As is stands, all this is racy because typically we assume
1574 * the information that is filled in here (except flags) doesn't
1575 * change while a STA structure is alive. As such, it should move
1576 * to between the sta_info_alloc() and sta_info_insert() above.
1577 */
1578
1579 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1580 WLAN_STA_AUTHORIZED);
1581
1582 rates = 0;
1583 basic_rates = 0;
1584 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1585
1586 for (i = 0; i < elems.supp_rates_len; i++) {
1587 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1588 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1589
1590 if (rate > 110)
1591 have_higher_than_11mbit = true;
1592
1593 for (j = 0; j < sband->n_bitrates; j++) {
1594 if (sband->bitrates[j].bitrate == rate) {
1595 rates |= BIT(j);
1596 if (is_basic)
1597 basic_rates |= BIT(j);
1598 break;
1599 }
1600 }
1601 }
1602
1603 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1604 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1605 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1606
1607 if (rate > 110)
1608 have_higher_than_11mbit = true;
1609
1610 for (j = 0; j < sband->n_bitrates; j++) {
1611 if (sband->bitrates[j].bitrate == rate) {
1612 rates |= BIT(j);
1613 if (is_basic)
1614 basic_rates |= BIT(j);
1615 break;
1616 }
1617 }
1618 }
1619
1620 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1621 sdata->vif.bss_conf.basic_rates = basic_rates;
1622
1623 /* cf. IEEE 802.11 9.2.12 */
1624 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1625 have_higher_than_11mbit)
1626 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1627 else
1628 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1629
1630 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1631 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1632 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1633 elems.ht_cap_elem, &sta->sta.ht_cap);
1634
1635 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1636
1637 rate_control_rate_init(sta);
1638
1639 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1640 set_sta_flags(sta, WLAN_STA_MFP);
1641
1642 if (elems.wmm_param)
1643 set_sta_flags(sta, WLAN_STA_WME);
1644
1645 if (newsta) {
1646 int err = sta_info_insert(sta);
1647 if (err) {
1648 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1649 " the AP (error %d)\n", sdata->dev->name, err);
1650 rcu_read_unlock();
1651 return;
1652 }
1653 }
1654
1655 rcu_read_unlock();
1656
1657 if (elems.wmm_param)
1658 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1659 elems.wmm_param_len);
1660 else
1661 ieee80211_set_wmm_default(sdata);
1662
1663 if (elems.ht_info_elem && elems.wmm_param &&
1664 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1665 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1666 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1667 ap_ht_cap_flags);
1668
1669 /* set AID and assoc capability,
1670 * ieee80211_set_associated() will tell the driver */
1671 bss_conf->aid = aid;
1672 bss_conf->assoc_capability = capab_info;
1673 ieee80211_set_associated(sdata, changed);
1674
1675 /*
1676 * initialise the time of last beacon to be the association time,
1677 * otherwise beacon loss check will trigger immediately
1678 */
1679 ifmgd->last_beacon = jiffies;
1680
1681 ieee80211_associated(sdata);
1682 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1683 }
1684
1685
1686 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1687 struct ieee80211_mgmt *mgmt,
1688 size_t len,
1689 struct ieee80211_rx_status *rx_status,
1690 struct ieee802_11_elems *elems,
1691 bool beacon)
1692 {
1693 struct ieee80211_local *local = sdata->local;
1694 int freq;
1695 struct ieee80211_bss *bss;
1696 struct ieee80211_channel *channel;
1697
1698 if (elems->ds_params && elems->ds_params_len == 1)
1699 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1700 else
1701 freq = rx_status->freq;
1702
1703 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1704
1705 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1706 return;
1707
1708 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1709 channel, beacon);
1710 if (!bss)
1711 return;
1712
1713 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1714 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1715 struct ieee80211_channel_sw_ie *sw_elem =
1716 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1717 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1718 }
1719
1720 ieee80211_rx_bss_put(local, bss);
1721 }
1722
1723
1724 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1725 struct ieee80211_mgmt *mgmt,
1726 size_t len,
1727 struct ieee80211_rx_status *rx_status)
1728 {
1729 struct ieee80211_if_managed *ifmgd;
1730 size_t baselen;
1731 struct ieee802_11_elems elems;
1732
1733 ifmgd = &sdata->u.mgd;
1734
1735 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1736 return; /* ignore ProbeResp to foreign address */
1737
1738 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1739 if (baselen > len)
1740 return;
1741
1742 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1743 &elems);
1744
1745 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1746
1747 /* direct probe may be part of the association flow */
1748 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1749 printk(KERN_DEBUG "%s direct probe responded\n",
1750 sdata->dev->name);
1751 ieee80211_authenticate(sdata);
1752 }
1753
1754 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1755 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1756 }
1757
1758 /*
1759 * This is the canonical list of information elements we care about,
1760 * the filter code also gives us all changes to the Microsoft OUI
1761 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1762 *
1763 * We implement beacon filtering in software since that means we can
1764 * avoid processing the frame here and in cfg80211, and userspace
1765 * will not be able to tell whether the hardware supports it or not.
1766 *
1767 * XXX: This list needs to be dynamic -- userspace needs to be able to
1768 * add items it requires. It also needs to be able to tell us to
1769 * look out for other vendor IEs.
1770 */
1771 static const u64 care_about_ies =
1772 (1ULL << WLAN_EID_COUNTRY) |
1773 (1ULL << WLAN_EID_ERP_INFO) |
1774 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1775 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1776 (1ULL << WLAN_EID_HT_CAPABILITY) |
1777 (1ULL << WLAN_EID_HT_INFORMATION);
1778
1779 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1780 struct ieee80211_mgmt *mgmt,
1781 size_t len,
1782 struct ieee80211_rx_status *rx_status)
1783 {
1784 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1785 size_t baselen;
1786 struct ieee802_11_elems elems;
1787 struct ieee80211_local *local = sdata->local;
1788 u32 changed = 0;
1789 bool erp_valid, directed_tim = false;
1790 u8 erp_value = 0;
1791 u32 ncrc;
1792
1793 /* Process beacon from the current BSS */
1794 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1795 if (baselen > len)
1796 return;
1797
1798 if (rx_status->freq != local->hw.conf.channel->center_freq)
1799 return;
1800
1801 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1802 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1803 return;
1804
1805 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1806 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1807 len - baselen, &elems,
1808 care_about_ies, ncrc);
1809
1810 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1811 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1812 ifmgd->aid);
1813
1814 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1815
1816 if (ncrc == ifmgd->beacon_crc)
1817 return;
1818 ifmgd->beacon_crc = ncrc;
1819
1820 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1821
1822 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1823 elems.wmm_param_len);
1824
1825 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1826 if (directed_tim) {
1827 if (local->hw.conf.dynamic_ps_timeout > 0) {
1828 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1829 ieee80211_hw_config(local,
1830 IEEE80211_CONF_CHANGE_PS);
1831 ieee80211_send_nullfunc(local, sdata, 0);
1832 } else {
1833 local->pspolling = true;
1834
1835 /*
1836 * Here is assumed that the driver will be
1837 * able to send ps-poll frame and receive a
1838 * response even though power save mode is
1839 * enabled, but some drivers might require
1840 * to disable power save here. This needs
1841 * to be investigated.
1842 */
1843 ieee80211_send_pspoll(local, sdata);
1844 }
1845 }
1846 }
1847
1848 if (elems.erp_info && elems.erp_info_len >= 1) {
1849 erp_valid = true;
1850 erp_value = elems.erp_info[0];
1851 } else {
1852 erp_valid = false;
1853 }
1854 changed |= ieee80211_handle_bss_capability(sdata,
1855 le16_to_cpu(mgmt->u.beacon.capab_info),
1856 erp_valid, erp_value);
1857
1858
1859 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1860 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1861 struct sta_info *sta;
1862 struct ieee80211_supported_band *sband;
1863 u16 ap_ht_cap_flags;
1864
1865 rcu_read_lock();
1866
1867 sta = sta_info_get(local, ifmgd->bssid);
1868 if (!sta) {
1869 rcu_read_unlock();
1870 return;
1871 }
1872
1873 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1874
1875 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1876 elems.ht_cap_elem, &sta->sta.ht_cap);
1877
1878 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1879
1880 rcu_read_unlock();
1881
1882 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1883 ap_ht_cap_flags);
1884 }
1885
1886 if (elems.country_elem) {
1887 /* Note we are only reviewing this on beacons
1888 * for the BSSID we are associated to */
1889 regulatory_hint_11d(local->hw.wiphy,
1890 elems.country_elem, elems.country_elem_len);
1891
1892 /* TODO: IBSS also needs this */
1893 if (elems.pwr_constr_elem)
1894 ieee80211_handle_pwr_constr(sdata,
1895 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1896 elems.pwr_constr_elem,
1897 elems.pwr_constr_elem_len);
1898 }
1899
1900 ieee80211_bss_info_change_notify(sdata, changed);
1901 }
1902
1903 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1904 struct sk_buff *skb,
1905 struct ieee80211_rx_status *rx_status)
1906 {
1907 struct ieee80211_local *local = sdata->local;
1908 struct ieee80211_mgmt *mgmt;
1909 u16 fc;
1910
1911 if (skb->len < 24)
1912 return RX_DROP_MONITOR;
1913
1914 mgmt = (struct ieee80211_mgmt *) skb->data;
1915 fc = le16_to_cpu(mgmt->frame_control);
1916
1917 switch (fc & IEEE80211_FCTL_STYPE) {
1918 case IEEE80211_STYPE_PROBE_REQ:
1919 case IEEE80211_STYPE_PROBE_RESP:
1920 case IEEE80211_STYPE_BEACON:
1921 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1922 case IEEE80211_STYPE_AUTH:
1923 case IEEE80211_STYPE_ASSOC_RESP:
1924 case IEEE80211_STYPE_REASSOC_RESP:
1925 case IEEE80211_STYPE_DEAUTH:
1926 case IEEE80211_STYPE_DISASSOC:
1927 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1928 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1929 return RX_QUEUED;
1930 }
1931
1932 return RX_DROP_MONITOR;
1933 }
1934
1935 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1936 struct sk_buff *skb)
1937 {
1938 struct ieee80211_rx_status *rx_status;
1939 struct ieee80211_mgmt *mgmt;
1940 u16 fc;
1941
1942 rx_status = (struct ieee80211_rx_status *) skb->cb;
1943 mgmt = (struct ieee80211_mgmt *) skb->data;
1944 fc = le16_to_cpu(mgmt->frame_control);
1945
1946 switch (fc & IEEE80211_FCTL_STYPE) {
1947 case IEEE80211_STYPE_PROBE_RESP:
1948 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1949 rx_status);
1950 break;
1951 case IEEE80211_STYPE_BEACON:
1952 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1953 rx_status);
1954 break;
1955 case IEEE80211_STYPE_AUTH:
1956 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1957 break;
1958 case IEEE80211_STYPE_ASSOC_RESP:
1959 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1960 break;
1961 case IEEE80211_STYPE_REASSOC_RESP:
1962 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1963 break;
1964 case IEEE80211_STYPE_DEAUTH:
1965 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1966 break;
1967 case IEEE80211_STYPE_DISASSOC:
1968 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1969 break;
1970 }
1971
1972 kfree_skb(skb);
1973 }
1974
1975 static void ieee80211_sta_timer(unsigned long data)
1976 {
1977 struct ieee80211_sub_if_data *sdata =
1978 (struct ieee80211_sub_if_data *) data;
1979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1980 struct ieee80211_local *local = sdata->local;
1981
1982 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1983 queue_work(local->hw.workqueue, &ifmgd->work);
1984 }
1985
1986 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1987 {
1988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1989 struct ieee80211_local *local = sdata->local;
1990
1991 /* Reset own TSF to allow time synchronization work. */
1992 drv_reset_tsf(local);
1993
1994 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1995
1996
1997 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1998 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1999 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2000 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2001 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2002 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2003 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2004 ifmgd->auth_alg = WLAN_AUTH_FT;
2005 else
2006 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2007 ifmgd->auth_transaction = -1;
2008 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2009 ifmgd->assoc_scan_tries = 0;
2010 ifmgd->direct_probe_tries = 0;
2011 ifmgd->auth_tries = 0;
2012 ifmgd->assoc_tries = 0;
2013 netif_tx_stop_all_queues(sdata->dev);
2014 netif_carrier_off(sdata->dev);
2015 }
2016
2017 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2018 {
2019 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2020 struct ieee80211_local *local = sdata->local;
2021 struct ieee80211_bss *bss;
2022 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2023 u8 ssid_len = ifmgd->ssid_len;
2024 u16 capa_mask = WLAN_CAPABILITY_ESS;
2025 u16 capa_val = WLAN_CAPABILITY_ESS;
2026 struct ieee80211_channel *chan = local->oper_channel;
2027
2028 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2029 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2030 IEEE80211_STA_AUTO_BSSID_SEL |
2031 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2032 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2033 if (sdata->default_key)
2034 capa_val |= WLAN_CAPABILITY_PRIVACY;
2035 }
2036
2037 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2038 chan = NULL;
2039
2040 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2041 bssid = NULL;
2042
2043 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2044 ssid = NULL;
2045 ssid_len = 0;
2046 }
2047
2048 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2049 bssid, ssid, ssid_len,
2050 capa_mask, capa_val);
2051
2052 if (bss) {
2053 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2054 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2055 ieee80211_sta_set_ssid(sdata, bss->ssid,
2056 bss->ssid_len);
2057 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2058 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2059 bss->supp_rates);
2060 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2061 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2062 else
2063 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2064
2065 /* Send out direct probe if no probe resp was received or
2066 * the one we have is outdated
2067 */
2068 if (!bss->last_probe_resp ||
2069 time_after(jiffies, bss->last_probe_resp
2070 + IEEE80211_SCAN_RESULT_EXPIRE))
2071 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2072 else
2073 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2074
2075 ieee80211_rx_bss_put(local, bss);
2076 ieee80211_sta_reset_auth(sdata);
2077 return 0;
2078 } else {
2079 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
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 ieee80211_recalc_idle(local);
2092 }
2093 }
2094 return -1;
2095 }
2096
2097
2098 static void ieee80211_sta_work(struct work_struct *work)
2099 {
2100 struct ieee80211_sub_if_data *sdata =
2101 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2102 struct ieee80211_local *local = sdata->local;
2103 struct ieee80211_if_managed *ifmgd;
2104 struct sk_buff *skb;
2105
2106 if (!netif_running(sdata->dev))
2107 return;
2108
2109 if (local->sw_scanning || local->hw_scanning)
2110 return;
2111
2112 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2113 return;
2114 ifmgd = &sdata->u.mgd;
2115
2116 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2117 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2118
2119 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2120 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2121 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2122 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2123 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2124 round_jiffies_relative(0));
2125 return;
2126 }
2127
2128 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2129 if (ieee80211_sta_config_auth(sdata))
2130 return;
2131 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2132 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2133 return;
2134
2135 ieee80211_recalc_idle(local);
2136
2137 switch (ifmgd->state) {
2138 case IEEE80211_STA_MLME_DISABLED:
2139 break;
2140 case IEEE80211_STA_MLME_DIRECT_PROBE:
2141 ieee80211_direct_probe(sdata);
2142 break;
2143 case IEEE80211_STA_MLME_AUTHENTICATE:
2144 ieee80211_authenticate(sdata);
2145 break;
2146 case IEEE80211_STA_MLME_ASSOCIATE:
2147 ieee80211_associate(sdata);
2148 break;
2149 case IEEE80211_STA_MLME_ASSOCIATED:
2150 ieee80211_associated(sdata);
2151 break;
2152 default:
2153 WARN_ON(1);
2154 break;
2155 }
2156
2157 if (ieee80211_privacy_mismatch(sdata)) {
2158 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2159 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2160
2161 ieee80211_set_disassoc(sdata, false, true,
2162 WLAN_REASON_UNSPECIFIED);
2163 }
2164 }
2165
2166 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2167 {
2168 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2169 /*
2170 * Need to update last_beacon to avoid beacon loss
2171 * test to trigger.
2172 */
2173 sdata->u.mgd.last_beacon = jiffies;
2174
2175
2176 queue_work(sdata->local->hw.workqueue,
2177 &sdata->u.mgd.work);
2178 }
2179 }
2180
2181 /* interface setup */
2182 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2183 {
2184 struct ieee80211_if_managed *ifmgd;
2185 u32 hw_flags;
2186
2187 ifmgd = &sdata->u.mgd;
2188 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2189 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2190 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2191 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2192 (unsigned long) sdata);
2193 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2194 (unsigned long) sdata);
2195 skb_queue_head_init(&ifmgd->skb_queue);
2196
2197 ifmgd->capab = WLAN_CAPABILITY_ESS;
2198 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2199 IEEE80211_AUTH_ALG_SHARED_KEY;
2200 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2201 IEEE80211_STA_AUTO_BSSID_SEL |
2202 IEEE80211_STA_AUTO_CHANNEL_SEL;
2203 if (sdata->local->hw.queues >= 4)
2204 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2205
2206 hw_flags = sdata->local->hw.flags;
2207
2208 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2209 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2210 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2211 }
2212 }
2213
2214 /* configuration hooks */
2215 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2216 {
2217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2218 struct ieee80211_local *local = sdata->local;
2219
2220 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2221 return;
2222
2223 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2224 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2225 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2226 IEEE80211_STA_AUTO_SSID_SEL))) {
2227
2228 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2229 ieee80211_set_disassoc(sdata, true, true,
2230 WLAN_REASON_DEAUTH_LEAVING);
2231
2232 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2233 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2234 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2235 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2236 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2237 queue_work(local->hw.workqueue, &ifmgd->work);
2238 }
2239 }
2240
2241 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2242 {
2243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2244
2245 if (ifmgd->ssid_len)
2246 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2247 else
2248 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2249
2250 return 0;
2251 }
2252
2253 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2254 {
2255 struct ieee80211_if_managed *ifmgd;
2256
2257 if (len > IEEE80211_MAX_SSID_LEN)
2258 return -EINVAL;
2259
2260 ifmgd = &sdata->u.mgd;
2261
2262 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2263 /*
2264 * Do not use reassociation if SSID is changed (different ESS).
2265 */
2266 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2267 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2268 memcpy(ifmgd->ssid, ssid, len);
2269 ifmgd->ssid_len = len;
2270 }
2271
2272 return ieee80211_sta_commit(sdata);
2273 }
2274
2275 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2276 {
2277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2278 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2279 *len = ifmgd->ssid_len;
2280 return 0;
2281 }
2282
2283 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2284 {
2285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2286
2287 if (is_valid_ether_addr(bssid)) {
2288 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2289 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2290 } else {
2291 memset(ifmgd->bssid, 0, ETH_ALEN);
2292 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2293 }
2294
2295 if (netif_running(sdata->dev))
2296 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2297
2298 return ieee80211_sta_commit(sdata);
2299 }
2300
2301 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2302 const char *ie, size_t len)
2303 {
2304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2305
2306 kfree(ifmgd->extra_ie);
2307 if (len == 0) {
2308 ifmgd->extra_ie = NULL;
2309 ifmgd->extra_ie_len = 0;
2310 return 0;
2311 }
2312 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2313 if (!ifmgd->extra_ie) {
2314 ifmgd->extra_ie_len = 0;
2315 return -ENOMEM;
2316 }
2317 memcpy(ifmgd->extra_ie, ie, len);
2318 ifmgd->extra_ie_len = len;
2319 return 0;
2320 }
2321
2322 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2323 {
2324 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2325 sdata->dev->name, reason);
2326
2327 ieee80211_set_disassoc(sdata, true, true, reason);
2328 return 0;
2329 }
2330
2331 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2332 {
2333 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2334
2335 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2336 sdata->dev->name, reason);
2337
2338 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2339 return -ENOLINK;
2340
2341 ieee80211_set_disassoc(sdata, false, true, reason);
2342 return 0;
2343 }
2344
2345 /* scan finished notification */
2346 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2347 {
2348 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2349
2350 /* Restart STA timers */
2351 rcu_read_lock();
2352 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2353 ieee80211_restart_sta_timer(sdata);
2354 rcu_read_unlock();
2355 }
2356
2357 int ieee80211_max_network_latency(struct notifier_block *nb,
2358 unsigned long data, void *dummy)
2359 {
2360 s32 latency_usec = (s32) data;
2361 struct ieee80211_local *local =
2362 container_of(nb, struct ieee80211_local,
2363 network_latency_notifier);
2364
2365 mutex_lock(&local->iflist_mtx);
2366 ieee80211_recalc_ps(local, latency_usec);
2367 mutex_unlock(&local->iflist_mtx);
2368
2369 return 0;
2370 }
AMDTP streaming driver for the Linux FireWire stack (Juju)