]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - net/mac80211/mlme.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mac80211: fix PS vs. scan race
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
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_interval = 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 |= ieee80211_handle_bss_capability(sdata,
846 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
847
848 cfg80211_hold_bss(&bss->cbss);
849
850 ieee80211_rx_bss_put(local, bss);
851 }
852
853 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
854 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
855 ieee80211_sta_send_associnfo(sdata);
856
857 ifmgd->last_probe = jiffies;
858 ieee80211_led_assoc(local, 1);
859
860 sdata->vif.bss_conf.assoc = 1;
861 /*
862 * For now just always ask the driver to update the basic rateset
863 * when we have associated, we aren't checking whether it actually
864 * changed or not.
865 */
866 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
867 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
868
869 /* will be same as sdata */
870 if (local->ps_sdata) {
871 mutex_lock(&local->iflist_mtx);
872 ieee80211_recalc_ps(local, -1);
873 mutex_unlock(&local->iflist_mtx);
874 }
875
876 netif_tx_start_all_queues(sdata->dev);
877 netif_carrier_on(sdata->dev);
878
879 ieee80211_sta_send_apinfo(sdata);
880 }
881
882 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
883 {
884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
885 struct ieee80211_local *local = sdata->local;
886
887 ifmgd->direct_probe_tries++;
888 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
889 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
890 sdata->dev->name, ifmgd->bssid);
891 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
892 ieee80211_sta_send_apinfo(sdata);
893
894 /*
895 * Most likely AP is not in the range so remove the
896 * bss information associated to the AP
897 */
898 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
899 sdata->local->hw.conf.channel->center_freq,
900 ifmgd->ssid, ifmgd->ssid_len);
901
902 /*
903 * We might have a pending scan which had no chance to run yet
904 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
905 * Hence, queue the STAs work again
906 */
907 queue_work(local->hw.workqueue, &ifmgd->work);
908 return;
909 }
910
911 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
912 sdata->dev->name, ifmgd->bssid,
913 ifmgd->direct_probe_tries);
914
915 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
916
917 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
918
919 /* Direct probe is sent to broadcast address as some APs
920 * will not answer to direct packet in unassociated state.
921 */
922 ieee80211_send_probe_req(sdata, NULL,
923 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
924
925 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
926 }
927
928
929 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
930 {
931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
932 struct ieee80211_local *local = sdata->local;
933 u8 *ies;
934 size_t ies_len;
935
936 ifmgd->auth_tries++;
937 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
938 printk(KERN_DEBUG "%s: authentication with AP %pM"
939 " timed out\n",
940 sdata->dev->name, ifmgd->bssid);
941 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
942 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
943 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
944 sdata->local->hw.conf.channel->center_freq,
945 ifmgd->ssid, ifmgd->ssid_len);
946
947 /*
948 * We might have a pending scan which had no chance to run yet
949 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
950 * Hence, queue the STAs work again
951 */
952 queue_work(local->hw.workqueue, &ifmgd->work);
953 return;
954 }
955
956 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
957 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
958 sdata->dev->name, ifmgd->bssid);
959
960 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
961 ies = ifmgd->sme_auth_ie;
962 ies_len = ifmgd->sme_auth_ie_len;
963 } else {
964 ies = NULL;
965 ies_len = 0;
966 }
967 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
968 ifmgd->bssid, 0);
969 ifmgd->auth_transaction = 2;
970
971 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
972 }
973
974 /*
975 * The disassoc 'reason' argument can be either our own reason
976 * if self disconnected or a reason code from the AP.
977 */
978 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
979 bool deauth, bool self_disconnected,
980 u16 reason)
981 {
982 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
983 struct ieee80211_local *local = sdata->local;
984 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
985 struct ieee80211_bss *bss;
986 struct sta_info *sta;
987 u32 changed = 0, config_changed = 0;
988
989 rcu_read_lock();
990
991 sta = sta_info_get(local, ifmgd->bssid);
992 if (!sta) {
993 rcu_read_unlock();
994 return;
995 }
996
997 if (deauth) {
998 ifmgd->direct_probe_tries = 0;
999 ifmgd->auth_tries = 0;
1000 }
1001 ifmgd->assoc_scan_tries = 0;
1002 ifmgd->assoc_tries = 0;
1003
1004 netif_tx_stop_all_queues(sdata->dev);
1005 netif_carrier_off(sdata->dev);
1006
1007 ieee80211_sta_tear_down_BA_sessions(sta);
1008
1009 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1010 conf->channel->center_freq,
1011 ifmgd->ssid, ifmgd->ssid_len);
1012
1013 if (bss) {
1014 cfg80211_unhold_bss(&bss->cbss);
1015 ieee80211_rx_bss_put(local, bss);
1016 }
1017
1018 if (self_disconnected) {
1019 if (deauth)
1020 ieee80211_send_deauth_disassoc(sdata,
1021 IEEE80211_STYPE_DEAUTH, reason);
1022 else
1023 ieee80211_send_deauth_disassoc(sdata,
1024 IEEE80211_STYPE_DISASSOC, reason);
1025 }
1026
1027 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1028 changed |= ieee80211_reset_erp_info(sdata);
1029
1030 ieee80211_led_assoc(local, 0);
1031 changed |= BSS_CHANGED_ASSOC;
1032 sdata->vif.bss_conf.assoc = false;
1033
1034 ieee80211_sta_send_apinfo(sdata);
1035
1036 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1037 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1038 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1039 sdata->local->hw.conf.channel->center_freq,
1040 ifmgd->ssid, ifmgd->ssid_len);
1041 }
1042
1043 rcu_read_unlock();
1044
1045 /* channel(_type) changes are handled by ieee80211_hw_config */
1046 local->oper_channel_type = NL80211_CHAN_NO_HT;
1047
1048 local->power_constr_level = 0;
1049
1050 del_timer_sync(&local->dynamic_ps_timer);
1051 cancel_work_sync(&local->dynamic_ps_enable_work);
1052
1053 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1054 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1055 config_changed |= IEEE80211_CONF_CHANGE_PS;
1056 }
1057
1058 ieee80211_hw_config(local, config_changed);
1059 ieee80211_bss_info_change_notify(sdata, changed);
1060
1061 rcu_read_lock();
1062
1063 sta = sta_info_get(local, ifmgd->bssid);
1064 if (!sta) {
1065 rcu_read_unlock();
1066 return;
1067 }
1068
1069 sta_info_unlink(&sta);
1070
1071 rcu_read_unlock();
1072
1073 sta_info_destroy(sta);
1074 }
1075
1076 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1077 {
1078 if (!sdata || !sdata->default_key ||
1079 sdata->default_key->conf.alg != ALG_WEP)
1080 return 0;
1081 return 1;
1082 }
1083
1084 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1085 {
1086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1087 struct ieee80211_local *local = sdata->local;
1088 struct ieee80211_bss *bss;
1089 int bss_privacy;
1090 int wep_privacy;
1091 int privacy_invoked;
1092
1093 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1094 return 0;
1095
1096 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1097 local->hw.conf.channel->center_freq,
1098 ifmgd->ssid, ifmgd->ssid_len);
1099 if (!bss)
1100 return 0;
1101
1102 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1103 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1104 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1105
1106 ieee80211_rx_bss_put(local, bss);
1107
1108 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1109 return 0;
1110
1111 return 1;
1112 }
1113
1114 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1115 {
1116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1117 struct ieee80211_local *local = sdata->local;
1118
1119 ifmgd->assoc_tries++;
1120 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1121 printk(KERN_DEBUG "%s: association with AP %pM"
1122 " timed out\n",
1123 sdata->dev->name, ifmgd->bssid);
1124 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1125 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1126 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1127 sdata->local->hw.conf.channel->center_freq,
1128 ifmgd->ssid, ifmgd->ssid_len);
1129 /*
1130 * We might have a pending scan which had no chance to run yet
1131 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1132 * Hence, queue the STAs work again
1133 */
1134 queue_work(local->hw.workqueue, &ifmgd->work);
1135 return;
1136 }
1137
1138 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1139 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1140 sdata->dev->name, ifmgd->bssid);
1141 if (ieee80211_privacy_mismatch(sdata)) {
1142 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1143 "mixed-cell disabled - abort association\n", sdata->dev->name);
1144 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1145 return;
1146 }
1147
1148 ieee80211_send_assoc(sdata);
1149
1150 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1151 }
1152
1153 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1154 struct ieee80211_hdr *hdr)
1155 {
1156 /*
1157 * We can postpone the mgd.timer whenever receiving unicast frames
1158 * from AP because we know that the connection is working both ways
1159 * at that time. But multicast frames (and hence also beacons) must
1160 * be ignored here, because we need to trigger the timer during
1161 * data idle periods for sending the periodical probe request to
1162 * the AP.
1163 */
1164 if (!is_multicast_ether_addr(hdr->addr1))
1165 mod_timer(&sdata->u.mgd.timer,
1166 jiffies + IEEE80211_MONITORING_INTERVAL);
1167 }
1168
1169 void ieee80211_beacon_loss_work(struct work_struct *work)
1170 {
1171 struct ieee80211_sub_if_data *sdata =
1172 container_of(work, struct ieee80211_sub_if_data,
1173 u.mgd.beacon_loss_work);
1174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1175
1176 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1177 if (net_ratelimit()) {
1178 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1179 "- sending probe request\n", sdata->dev->name,
1180 sdata->u.mgd.bssid);
1181 }
1182 #endif
1183
1184 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1185 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1186 ifmgd->ssid_len, NULL, 0);
1187
1188 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
1189 }
1190
1191 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1192 {
1193 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1194
1195 queue_work(sdata->local->hw.workqueue,
1196 &sdata->u.mgd.beacon_loss_work);
1197 }
1198 EXPORT_SYMBOL(ieee80211_beacon_loss);
1199
1200 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1201 {
1202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1203 struct ieee80211_local *local = sdata->local;
1204 struct sta_info *sta;
1205 bool disassoc = false;
1206
1207 /* TODO: start monitoring current AP signal quality and number of
1208 * missed beacons. Scan other channels every now and then and search
1209 * for better APs. */
1210 /* TODO: remove expired BSSes */
1211
1212 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1213
1214 rcu_read_lock();
1215
1216 sta = sta_info_get(local, ifmgd->bssid);
1217 if (!sta) {
1218 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1219 sdata->dev->name, ifmgd->bssid);
1220 disassoc = true;
1221 goto unlock;
1222 }
1223
1224 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1225 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1226 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1227 "- disassociating\n",
1228 sdata->dev->name, ifmgd->bssid);
1229 disassoc = true;
1230 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1231 goto unlock;
1232 }
1233
1234 /*
1235 * Beacon filtering is only enabled with power save and then the
1236 * stack should not check for beacon loss.
1237 */
1238 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1239 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1240 time_after(jiffies,
1241 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1242 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1243 if (net_ratelimit()) {
1244 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1245 "- sending probe request\n",
1246 sdata->dev->name, ifmgd->bssid);
1247 }
1248 #endif
1249 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1250 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1251 ifmgd->ssid_len, NULL, 0);
1252 goto unlock;
1253
1254 }
1255
1256 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1257 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1258 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1259 ifmgd->ssid_len, NULL, 0);
1260 }
1261
1262 unlock:
1263 rcu_read_unlock();
1264
1265 if (disassoc)
1266 ieee80211_set_disassoc(sdata, true, true,
1267 WLAN_REASON_PREV_AUTH_NOT_VALID);
1268 else
1269 mod_timer(&ifmgd->timer, jiffies +
1270 IEEE80211_MONITORING_INTERVAL);
1271 }
1272
1273
1274 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1275 {
1276 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1277
1278 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1279 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1280 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1281 /* Wait for SME to request association */
1282 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1283 } else
1284 ieee80211_associate(sdata);
1285 }
1286
1287
1288 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1289 struct ieee80211_mgmt *mgmt,
1290 size_t len)
1291 {
1292 u8 *pos;
1293 struct ieee802_11_elems elems;
1294
1295 pos = mgmt->u.auth.variable;
1296 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1297 if (!elems.challenge)
1298 return;
1299 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1300 elems.challenge - 2, elems.challenge_len + 2,
1301 sdata->u.mgd.bssid, 1);
1302 sdata->u.mgd.auth_transaction = 4;
1303 }
1304
1305 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1306 struct ieee80211_mgmt *mgmt,
1307 size_t len)
1308 {
1309 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1310 u16 auth_alg, auth_transaction, status_code;
1311
1312 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1313 return;
1314
1315 if (len < 24 + 6)
1316 return;
1317
1318 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1319 return;
1320
1321 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1322 return;
1323
1324 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1325 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1326 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1327
1328 if (auth_alg != ifmgd->auth_alg ||
1329 auth_transaction != ifmgd->auth_transaction)
1330 return;
1331
1332 if (status_code != WLAN_STATUS_SUCCESS) {
1333 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1334 u8 algs[3];
1335 const int num_algs = ARRAY_SIZE(algs);
1336 int i, pos;
1337 algs[0] = algs[1] = algs[2] = 0xff;
1338 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1339 algs[0] = WLAN_AUTH_OPEN;
1340 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1341 algs[1] = WLAN_AUTH_SHARED_KEY;
1342 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1343 algs[2] = WLAN_AUTH_LEAP;
1344 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1345 pos = 0;
1346 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1347 pos = 1;
1348 else
1349 pos = 2;
1350 for (i = 0; i < num_algs; i++) {
1351 pos++;
1352 if (pos >= num_algs)
1353 pos = 0;
1354 if (algs[pos] == ifmgd->auth_alg ||
1355 algs[pos] == 0xff)
1356 continue;
1357 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1358 !ieee80211_sta_wep_configured(sdata))
1359 continue;
1360 ifmgd->auth_alg = algs[pos];
1361 break;
1362 }
1363 }
1364 return;
1365 }
1366
1367 switch (ifmgd->auth_alg) {
1368 case WLAN_AUTH_OPEN:
1369 case WLAN_AUTH_LEAP:
1370 case WLAN_AUTH_FT:
1371 ieee80211_auth_completed(sdata);
1372 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1373 break;
1374 case WLAN_AUTH_SHARED_KEY:
1375 if (ifmgd->auth_transaction == 4) {
1376 ieee80211_auth_completed(sdata);
1377 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1378 } else
1379 ieee80211_auth_challenge(sdata, mgmt, len);
1380 break;
1381 }
1382 }
1383
1384
1385 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1386 struct ieee80211_mgmt *mgmt,
1387 size_t len)
1388 {
1389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1390 u16 reason_code;
1391
1392 if (len < 24 + 2)
1393 return;
1394
1395 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1396 return;
1397
1398 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1399
1400 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1401 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1402 sdata->dev->name, reason_code);
1403
1404 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1405 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1406 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1407 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1408 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1409 mod_timer(&ifmgd->timer, jiffies +
1410 IEEE80211_RETRY_AUTH_INTERVAL);
1411 }
1412
1413 ieee80211_set_disassoc(sdata, true, false, 0);
1414 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1415 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1416 }
1417
1418
1419 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1420 struct ieee80211_mgmt *mgmt,
1421 size_t len)
1422 {
1423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1424 u16 reason_code;
1425
1426 if (len < 24 + 2)
1427 return;
1428
1429 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1430 return;
1431
1432 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1433
1434 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1435 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1436 sdata->dev->name, reason_code);
1437
1438 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1439 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1440 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1441 mod_timer(&ifmgd->timer, jiffies +
1442 IEEE80211_RETRY_AUTH_INTERVAL);
1443 }
1444
1445 ieee80211_set_disassoc(sdata, false, false, reason_code);
1446 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1447 }
1448
1449
1450 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1451 struct ieee80211_mgmt *mgmt,
1452 size_t len,
1453 int reassoc)
1454 {
1455 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1456 struct ieee80211_local *local = sdata->local;
1457 struct ieee80211_supported_band *sband;
1458 struct sta_info *sta;
1459 u32 rates, basic_rates;
1460 u16 capab_info, status_code, aid;
1461 struct ieee802_11_elems elems;
1462 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1463 u8 *pos;
1464 u32 changed = 0;
1465 int i, j;
1466 bool have_higher_than_11mbit = false, newsta = false;
1467 u16 ap_ht_cap_flags;
1468
1469 /* AssocResp and ReassocResp have identical structure, so process both
1470 * of them in this function. */
1471
1472 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1473 return;
1474
1475 if (len < 24 + 6)
1476 return;
1477
1478 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1479 return;
1480
1481 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1482 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1483 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1484
1485 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1486 "status=%d aid=%d)\n",
1487 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1488 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1489
1490 pos = mgmt->u.assoc_resp.variable;
1491 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1492
1493 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1494 elems.timeout_int && elems.timeout_int_len == 5 &&
1495 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1496 u32 tu, ms;
1497 tu = get_unaligned_le32(elems.timeout_int + 1);
1498 ms = tu * 1024 / 1000;
1499 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1500 "comeback duration %u TU (%u ms)\n",
1501 sdata->dev->name, tu, ms);
1502 if (ms > IEEE80211_ASSOC_TIMEOUT)
1503 mod_timer(&ifmgd->timer,
1504 jiffies + msecs_to_jiffies(ms));
1505 return;
1506 }
1507
1508 if (status_code != WLAN_STATUS_SUCCESS) {
1509 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1510 sdata->dev->name, status_code);
1511 /* if this was a reassociation, ensure we try a "full"
1512 * association next time. This works around some broken APs
1513 * which do not correctly reject reassociation requests. */
1514 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1515 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1516 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1517 /* Wait for SME to decide what to do next */
1518 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1519 }
1520 return;
1521 }
1522
1523 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1524 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1525 "set\n", sdata->dev->name, aid);
1526 aid &= ~(BIT(15) | BIT(14));
1527
1528 if (!elems.supp_rates) {
1529 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1530 sdata->dev->name);
1531 return;
1532 }
1533
1534 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1535 ifmgd->aid = aid;
1536 ifmgd->ap_capab = capab_info;
1537
1538 kfree(ifmgd->assocresp_ies);
1539 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1540 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1541 if (ifmgd->assocresp_ies)
1542 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1543
1544 rcu_read_lock();
1545
1546 /* Add STA entry for the AP */
1547 sta = sta_info_get(local, ifmgd->bssid);
1548 if (!sta) {
1549 newsta = true;
1550
1551 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1552 if (!sta) {
1553 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1554 " the AP\n", sdata->dev->name);
1555 rcu_read_unlock();
1556 return;
1557 }
1558
1559 /* update new sta with its last rx activity */
1560 sta->last_rx = jiffies;
1561 }
1562
1563 /*
1564 * FIXME: Do we really need to update the sta_info's information here?
1565 * We already know about the AP (we found it in our list) so it
1566 * should already be filled with the right info, no?
1567 * As is stands, all this is racy because typically we assume
1568 * the information that is filled in here (except flags) doesn't
1569 * change while a STA structure is alive. As such, it should move
1570 * to between the sta_info_alloc() and sta_info_insert() above.
1571 */
1572
1573 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1574 WLAN_STA_AUTHORIZED);
1575
1576 rates = 0;
1577 basic_rates = 0;
1578 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1579
1580 for (i = 0; i < elems.supp_rates_len; i++) {
1581 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1582 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1583
1584 if (rate > 110)
1585 have_higher_than_11mbit = true;
1586
1587 for (j = 0; j < sband->n_bitrates; j++) {
1588 if (sband->bitrates[j].bitrate == rate) {
1589 rates |= BIT(j);
1590 if (is_basic)
1591 basic_rates |= BIT(j);
1592 break;
1593 }
1594 }
1595 }
1596
1597 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1598 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1599 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1600
1601 if (rate > 110)
1602 have_higher_than_11mbit = true;
1603
1604 for (j = 0; j < sband->n_bitrates; j++) {
1605 if (sband->bitrates[j].bitrate == rate) {
1606 rates |= BIT(j);
1607 if (is_basic)
1608 basic_rates |= BIT(j);
1609 break;
1610 }
1611 }
1612 }
1613
1614 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1615 sdata->vif.bss_conf.basic_rates = basic_rates;
1616
1617 /* cf. IEEE 802.11 9.2.12 */
1618 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1619 have_higher_than_11mbit)
1620 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1621 else
1622 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1623
1624 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1625 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1626 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1627 elems.ht_cap_elem, &sta->sta.ht_cap);
1628
1629 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1630
1631 rate_control_rate_init(sta);
1632
1633 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1634 set_sta_flags(sta, WLAN_STA_MFP);
1635
1636 if (elems.wmm_param)
1637 set_sta_flags(sta, WLAN_STA_WME);
1638
1639 if (newsta) {
1640 int err = sta_info_insert(sta);
1641 if (err) {
1642 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1643 " the AP (error %d)\n", sdata->dev->name, err);
1644 rcu_read_unlock();
1645 return;
1646 }
1647 }
1648
1649 rcu_read_unlock();
1650
1651 if (elems.wmm_param)
1652 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1653 elems.wmm_param_len);
1654
1655 if (elems.ht_info_elem && elems.wmm_param &&
1656 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1657 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1658 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1659 ap_ht_cap_flags);
1660
1661 /* set AID and assoc capability,
1662 * ieee80211_set_associated() will tell the driver */
1663 bss_conf->aid = aid;
1664 bss_conf->assoc_capability = capab_info;
1665 ieee80211_set_associated(sdata, changed);
1666
1667 /*
1668 * initialise the time of last beacon to be the association time,
1669 * otherwise beacon loss check will trigger immediately
1670 */
1671 ifmgd->last_beacon = jiffies;
1672
1673 ieee80211_associated(sdata);
1674 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1675 }
1676
1677
1678 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1679 struct ieee80211_mgmt *mgmt,
1680 size_t len,
1681 struct ieee80211_rx_status *rx_status,
1682 struct ieee802_11_elems *elems,
1683 bool beacon)
1684 {
1685 struct ieee80211_local *local = sdata->local;
1686 int freq;
1687 struct ieee80211_bss *bss;
1688 struct ieee80211_channel *channel;
1689
1690 if (elems->ds_params && elems->ds_params_len == 1)
1691 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1692 else
1693 freq = rx_status->freq;
1694
1695 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1696
1697 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1698 return;
1699
1700 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1701 channel, beacon);
1702 if (!bss)
1703 return;
1704
1705 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1706 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1707 struct ieee80211_channel_sw_ie *sw_elem =
1708 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1709 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1710 }
1711
1712 ieee80211_rx_bss_put(local, bss);
1713 }
1714
1715
1716 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1717 struct ieee80211_mgmt *mgmt,
1718 size_t len,
1719 struct ieee80211_rx_status *rx_status)
1720 {
1721 struct ieee80211_if_managed *ifmgd;
1722 size_t baselen;
1723 struct ieee802_11_elems elems;
1724
1725 ifmgd = &sdata->u.mgd;
1726
1727 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1728 return; /* ignore ProbeResp to foreign address */
1729
1730 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1731 if (baselen > len)
1732 return;
1733
1734 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1735 &elems);
1736
1737 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1738
1739 /* direct probe may be part of the association flow */
1740 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1741 &ifmgd->request)) {
1742 printk(KERN_DEBUG "%s direct probe responded\n",
1743 sdata->dev->name);
1744 ieee80211_authenticate(sdata);
1745 }
1746
1747 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1748 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1749 }
1750
1751 /*
1752 * This is the canonical list of information elements we care about,
1753 * the filter code also gives us all changes to the Microsoft OUI
1754 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1755 *
1756 * We implement beacon filtering in software since that means we can
1757 * avoid processing the frame here and in cfg80211, and userspace
1758 * will not be able to tell whether the hardware supports it or not.
1759 *
1760 * XXX: This list needs to be dynamic -- userspace needs to be able to
1761 * add items it requires. It also needs to be able to tell us to
1762 * look out for other vendor IEs.
1763 */
1764 static const u64 care_about_ies =
1765 (1ULL << WLAN_EID_COUNTRY) |
1766 (1ULL << WLAN_EID_ERP_INFO) |
1767 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1768 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1769 (1ULL << WLAN_EID_HT_CAPABILITY) |
1770 (1ULL << WLAN_EID_HT_INFORMATION);
1771
1772 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1773 struct ieee80211_mgmt *mgmt,
1774 size_t len,
1775 struct ieee80211_rx_status *rx_status)
1776 {
1777 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1778 size_t baselen;
1779 struct ieee802_11_elems elems;
1780 struct ieee80211_local *local = sdata->local;
1781 u32 changed = 0;
1782 bool erp_valid, directed_tim = false;
1783 u8 erp_value = 0;
1784 u32 ncrc;
1785
1786 /* Process beacon from the current BSS */
1787 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1788 if (baselen > len)
1789 return;
1790
1791 if (rx_status->freq != local->hw.conf.channel->center_freq)
1792 return;
1793
1794 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1795 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1796 return;
1797
1798 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1799 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1800 len - baselen, &elems,
1801 care_about_ies, ncrc);
1802
1803 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1804 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1805 ifmgd->aid);
1806
1807 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1808
1809 if (ncrc == ifmgd->beacon_crc)
1810 return;
1811 ifmgd->beacon_crc = ncrc;
1812
1813 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1814
1815 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1816 elems.wmm_param_len);
1817
1818 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1819 if (directed_tim) {
1820 if (local->hw.conf.dynamic_ps_timeout > 0) {
1821 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1822 ieee80211_hw_config(local,
1823 IEEE80211_CONF_CHANGE_PS);
1824 ieee80211_send_nullfunc(local, sdata, 0);
1825 } else {
1826 local->pspolling = true;
1827
1828 /*
1829 * Here is assumed that the driver will be
1830 * able to send ps-poll frame and receive a
1831 * response even though power save mode is
1832 * enabled, but some drivers might require
1833 * to disable power save here. This needs
1834 * to be investigated.
1835 */
1836 ieee80211_send_pspoll(local, sdata);
1837 }
1838 }
1839 }
1840
1841 if (elems.erp_info && elems.erp_info_len >= 1) {
1842 erp_valid = true;
1843 erp_value = elems.erp_info[0];
1844 } else {
1845 erp_valid = false;
1846 }
1847 changed |= ieee80211_handle_bss_capability(sdata,
1848 le16_to_cpu(mgmt->u.beacon.capab_info),
1849 erp_valid, erp_value);
1850
1851
1852 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1853 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1854 struct sta_info *sta;
1855 struct ieee80211_supported_band *sband;
1856 u16 ap_ht_cap_flags;
1857
1858 rcu_read_lock();
1859
1860 sta = sta_info_get(local, ifmgd->bssid);
1861 if (!sta) {
1862 rcu_read_unlock();
1863 return;
1864 }
1865
1866 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1867
1868 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1869 elems.ht_cap_elem, &sta->sta.ht_cap);
1870
1871 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1872
1873 rcu_read_unlock();
1874
1875 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1876 ap_ht_cap_flags);
1877 }
1878
1879 if (elems.country_elem) {
1880 /* Note we are only reviewing this on beacons
1881 * for the BSSID we are associated to */
1882 regulatory_hint_11d(local->hw.wiphy,
1883 elems.country_elem, elems.country_elem_len);
1884
1885 /* TODO: IBSS also needs this */
1886 if (elems.pwr_constr_elem)
1887 ieee80211_handle_pwr_constr(sdata,
1888 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1889 elems.pwr_constr_elem,
1890 elems.pwr_constr_elem_len);
1891 }
1892
1893 ieee80211_bss_info_change_notify(sdata, changed);
1894 }
1895
1896 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1897 struct sk_buff *skb,
1898 struct ieee80211_rx_status *rx_status)
1899 {
1900 struct ieee80211_local *local = sdata->local;
1901 struct ieee80211_mgmt *mgmt;
1902 u16 fc;
1903
1904 if (skb->len < 24)
1905 return RX_DROP_MONITOR;
1906
1907 mgmt = (struct ieee80211_mgmt *) skb->data;
1908 fc = le16_to_cpu(mgmt->frame_control);
1909
1910 switch (fc & IEEE80211_FCTL_STYPE) {
1911 case IEEE80211_STYPE_PROBE_REQ:
1912 case IEEE80211_STYPE_PROBE_RESP:
1913 case IEEE80211_STYPE_BEACON:
1914 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1915 case IEEE80211_STYPE_AUTH:
1916 case IEEE80211_STYPE_ASSOC_RESP:
1917 case IEEE80211_STYPE_REASSOC_RESP:
1918 case IEEE80211_STYPE_DEAUTH:
1919 case IEEE80211_STYPE_DISASSOC:
1920 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1921 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1922 return RX_QUEUED;
1923 }
1924
1925 return RX_DROP_MONITOR;
1926 }
1927
1928 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1929 struct sk_buff *skb)
1930 {
1931 struct ieee80211_rx_status *rx_status;
1932 struct ieee80211_mgmt *mgmt;
1933 u16 fc;
1934
1935 rx_status = (struct ieee80211_rx_status *) skb->cb;
1936 mgmt = (struct ieee80211_mgmt *) skb->data;
1937 fc = le16_to_cpu(mgmt->frame_control);
1938
1939 switch (fc & IEEE80211_FCTL_STYPE) {
1940 case IEEE80211_STYPE_PROBE_RESP:
1941 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1942 rx_status);
1943 break;
1944 case IEEE80211_STYPE_BEACON:
1945 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1946 rx_status);
1947 break;
1948 case IEEE80211_STYPE_AUTH:
1949 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1950 break;
1951 case IEEE80211_STYPE_ASSOC_RESP:
1952 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1953 break;
1954 case IEEE80211_STYPE_REASSOC_RESP:
1955 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1956 break;
1957 case IEEE80211_STYPE_DEAUTH:
1958 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1959 break;
1960 case IEEE80211_STYPE_DISASSOC:
1961 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1962 break;
1963 }
1964
1965 kfree_skb(skb);
1966 }
1967
1968 static void ieee80211_sta_timer(unsigned long data)
1969 {
1970 struct ieee80211_sub_if_data *sdata =
1971 (struct ieee80211_sub_if_data *) data;
1972 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1973 struct ieee80211_local *local = sdata->local;
1974
1975 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1976 queue_work(local->hw.workqueue, &ifmgd->work);
1977 }
1978
1979 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1980 {
1981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1982 struct ieee80211_local *local = sdata->local;
1983
1984 if (local->ops->reset_tsf) {
1985 /* Reset own TSF to allow time synchronization work. */
1986 local->ops->reset_tsf(local_to_hw(local));
1987 }
1988
1989 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1990
1991
1992 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1993 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1994 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1995 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1996 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1997 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1998 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1999 ifmgd->auth_alg = WLAN_AUTH_FT;
2000 else
2001 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2002 ifmgd->auth_transaction = -1;
2003 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2004 ifmgd->assoc_scan_tries = 0;
2005 ifmgd->direct_probe_tries = 0;
2006 ifmgd->auth_tries = 0;
2007 ifmgd->assoc_tries = 0;
2008 netif_tx_stop_all_queues(sdata->dev);
2009 netif_carrier_off(sdata->dev);
2010 }
2011
2012 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2013 {
2014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2015 struct ieee80211_local *local = sdata->local;
2016 struct ieee80211_bss *bss;
2017 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2018 u8 ssid_len = ifmgd->ssid_len;
2019 u16 capa_mask = WLAN_CAPABILITY_ESS;
2020 u16 capa_val = WLAN_CAPABILITY_ESS;
2021 struct ieee80211_channel *chan = local->oper_channel;
2022
2023 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2024 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2025 IEEE80211_STA_AUTO_BSSID_SEL |
2026 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2027 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2028 if (sdata->default_key)
2029 capa_val |= WLAN_CAPABILITY_PRIVACY;
2030 }
2031
2032 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2033 chan = NULL;
2034
2035 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2036 bssid = NULL;
2037
2038 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2039 ssid = NULL;
2040 ssid_len = 0;
2041 }
2042
2043 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2044 bssid, ssid, ssid_len,
2045 capa_mask, capa_val);
2046
2047 if (bss) {
2048 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2049 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2050 ieee80211_sta_set_ssid(sdata, bss->ssid,
2051 bss->ssid_len);
2052 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2053 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2054 bss->supp_rates);
2055 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2056 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2057 else
2058 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2059
2060 /* Send out direct probe if no probe resp was received or
2061 * the one we have is outdated
2062 */
2063 if (!bss->last_probe_resp ||
2064 time_after(jiffies, bss->last_probe_resp
2065 + IEEE80211_SCAN_RESULT_EXPIRE))
2066 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2067 else
2068 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2069
2070 ieee80211_rx_bss_put(local, bss);
2071 ieee80211_sta_reset_auth(sdata);
2072 return 0;
2073 } else {
2074 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2075 ifmgd->assoc_scan_tries++;
2076 /* XXX maybe racy? */
2077 if (local->scan_req)
2078 return -1;
2079 memcpy(local->int_scan_req.ssids[0].ssid,
2080 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
2081 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
2082 local->int_scan_req.ssids[0].ssid_len = 0;
2083 else
2084 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
2085
2086 if (ieee80211_start_scan(sdata, &local->int_scan_req))
2087 ieee80211_scan_failed(local);
2088
2089 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2090 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2091 } else {
2092 ifmgd->assoc_scan_tries = 0;
2093 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2094 }
2095 }
2096 return -1;
2097 }
2098
2099
2100 static void ieee80211_sta_work(struct work_struct *work)
2101 {
2102 struct ieee80211_sub_if_data *sdata =
2103 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2104 struct ieee80211_local *local = sdata->local;
2105 struct ieee80211_if_managed *ifmgd;
2106 struct sk_buff *skb;
2107
2108 if (!netif_running(sdata->dev))
2109 return;
2110
2111 if (local->sw_scanning || local->hw_scanning)
2112 return;
2113
2114 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2115 return;
2116 ifmgd = &sdata->u.mgd;
2117
2118 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2119 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2120
2121 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2122 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2123 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2124 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2125 /*
2126 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
2127 * (which queued ieee80211_sta_work) did not return an error. Thus, call
2128 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
2129 * notify the scan requester.
2130 */
2131 if (ieee80211_start_scan(sdata, local->scan_req))
2132 ieee80211_scan_failed(local);
2133 return;
2134 }
2135
2136 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2137 if (ieee80211_sta_config_auth(sdata))
2138 return;
2139 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2140 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2141 return;
2142
2143 switch (ifmgd->state) {
2144 case IEEE80211_STA_MLME_DISABLED:
2145 break;
2146 case IEEE80211_STA_MLME_DIRECT_PROBE:
2147 ieee80211_direct_probe(sdata);
2148 break;
2149 case IEEE80211_STA_MLME_AUTHENTICATE:
2150 ieee80211_authenticate(sdata);
2151 break;
2152 case IEEE80211_STA_MLME_ASSOCIATE:
2153 ieee80211_associate(sdata);
2154 break;
2155 case IEEE80211_STA_MLME_ASSOCIATED:
2156 ieee80211_associated(sdata);
2157 break;
2158 default:
2159 WARN_ON(1);
2160 break;
2161 }
2162
2163 if (ieee80211_privacy_mismatch(sdata)) {
2164 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2165 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2166
2167 ieee80211_set_disassoc(sdata, false, true,
2168 WLAN_REASON_UNSPECIFIED);
2169 }
2170 }
2171
2172 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2173 {
2174 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2175 /*
2176 * Need to update last_beacon to avoid beacon loss
2177 * test to trigger.
2178 */
2179 sdata->u.mgd.last_beacon = jiffies;
2180
2181
2182 queue_work(sdata->local->hw.workqueue,
2183 &sdata->u.mgd.work);
2184 }
2185 }
2186
2187 /* interface setup */
2188 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2189 {
2190 struct ieee80211_if_managed *ifmgd;
2191 u32 hw_flags;
2192
2193 ifmgd = &sdata->u.mgd;
2194 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2195 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2196 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2197 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2198 (unsigned long) sdata);
2199 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2200 (unsigned long) sdata);
2201 skb_queue_head_init(&ifmgd->skb_queue);
2202
2203 ifmgd->capab = WLAN_CAPABILITY_ESS;
2204 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2205 IEEE80211_AUTH_ALG_SHARED_KEY;
2206 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2207 IEEE80211_STA_AUTO_BSSID_SEL |
2208 IEEE80211_STA_AUTO_CHANNEL_SEL;
2209 if (sdata->local->hw.queues >= 4)
2210 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2211
2212 hw_flags = sdata->local->hw.flags;
2213
2214 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2215 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2216 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2217 }
2218 }
2219
2220 /* configuration hooks */
2221 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2222 {
2223 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2224 struct ieee80211_local *local = sdata->local;
2225
2226 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2227 return;
2228
2229 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2230 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2231 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2232 IEEE80211_STA_AUTO_SSID_SEL))) {
2233
2234 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2235 ieee80211_set_disassoc(sdata, true, true,
2236 WLAN_REASON_DEAUTH_LEAVING);
2237
2238 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2239 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2240 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2241 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2242 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2243 queue_work(local->hw.workqueue, &ifmgd->work);
2244 }
2245 }
2246
2247 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2248 {
2249 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2250
2251 if (ifmgd->ssid_len)
2252 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2253 else
2254 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2255
2256 return 0;
2257 }
2258
2259 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2260 {
2261 struct ieee80211_if_managed *ifmgd;
2262
2263 if (len > IEEE80211_MAX_SSID_LEN)
2264 return -EINVAL;
2265
2266 ifmgd = &sdata->u.mgd;
2267
2268 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2269 /*
2270 * Do not use reassociation if SSID is changed (different ESS).
2271 */
2272 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2273 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2274 memcpy(ifmgd->ssid, ssid, len);
2275 ifmgd->ssid_len = len;
2276 }
2277
2278 return ieee80211_sta_commit(sdata);
2279 }
2280
2281 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2282 {
2283 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2284 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2285 *len = ifmgd->ssid_len;
2286 return 0;
2287 }
2288
2289 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2290 {
2291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2292
2293 if (is_valid_ether_addr(bssid)) {
2294 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2295 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2296 } else {
2297 memset(ifmgd->bssid, 0, ETH_ALEN);
2298 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2299 }
2300
2301 if (netif_running(sdata->dev)) {
2302 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2303 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2304 "the low-level driver\n", sdata->dev->name);
2305 }
2306 }
2307
2308 return ieee80211_sta_commit(sdata);
2309 }
2310
2311 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2312 const char *ie, size_t len)
2313 {
2314 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2315
2316 kfree(ifmgd->extra_ie);
2317 if (len == 0) {
2318 ifmgd->extra_ie = NULL;
2319 ifmgd->extra_ie_len = 0;
2320 return 0;
2321 }
2322 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2323 if (!ifmgd->extra_ie) {
2324 ifmgd->extra_ie_len = 0;
2325 return -ENOMEM;
2326 }
2327 memcpy(ifmgd->extra_ie, ie, len);
2328 ifmgd->extra_ie_len = len;
2329 return 0;
2330 }
2331
2332 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2333 {
2334 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2335 sdata->dev->name, reason);
2336
2337 ieee80211_set_disassoc(sdata, true, true, reason);
2338 return 0;
2339 }
2340
2341 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2342 {
2343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2344
2345 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2346 sdata->dev->name, reason);
2347
2348 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2349 return -ENOLINK;
2350
2351 ieee80211_set_disassoc(sdata, false, true, reason);
2352 return 0;
2353 }
2354
2355 /* scan finished notification */
2356 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2357 {
2358 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2359
2360 /* Restart STA timers */
2361 rcu_read_lock();
2362 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2363 ieee80211_restart_sta_timer(sdata);
2364 rcu_read_unlock();
2365 }
2366
2367 int ieee80211_max_network_latency(struct notifier_block *nb,
2368 unsigned long data, void *dummy)
2369 {
2370 s32 latency_usec = (s32) data;
2371 struct ieee80211_local *local =
2372 container_of(nb, struct ieee80211_local,
2373 network_latency_notifier);
2374
2375 mutex_lock(&local->iflist_mtx);
2376 ieee80211_recalc_ps(local, latency_usec);
2377 mutex_unlock(&local->iflist_mtx);
2378
2379 return 0;
2380 }
Ubuntu Artful kernel mirror