]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - net/mac80211/mlme.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mac80211: calculate maximum sleep interval
[mirror_ubuntu-bionic-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 if (conf->dynamic_ps_timeout > 0 &&
491 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
492 mod_timer(&local->dynamic_ps_timer, jiffies +
493 msecs_to_jiffies(conf->dynamic_ps_timeout));
494 } else {
495 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
496 ieee80211_send_nullfunc(local, sdata, 1);
497 conf->flags |= IEEE80211_CONF_PS;
498 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
499 }
500 }
501
502 static void ieee80211_change_ps(struct ieee80211_local *local)
503 {
504 struct ieee80211_conf *conf = &local->hw.conf;
505
506 if (local->ps_sdata) {
507 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
508 return;
509
510 ieee80211_enable_ps(local, local->ps_sdata);
511 } else if (conf->flags & IEEE80211_CONF_PS) {
512 conf->flags &= ~IEEE80211_CONF_PS;
513 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
514 del_timer_sync(&local->dynamic_ps_timer);
515 cancel_work_sync(&local->dynamic_ps_enable_work);
516 }
517 }
518
519 /* need to hold RTNL or interface lock */
520 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
521 {
522 struct ieee80211_sub_if_data *sdata, *found = NULL;
523 int count = 0;
524
525 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
526 local->ps_sdata = NULL;
527 return;
528 }
529
530 list_for_each_entry(sdata, &local->interfaces, list) {
531 if (!netif_running(sdata->dev))
532 continue;
533 if (sdata->vif.type != NL80211_IFTYPE_STATION)
534 continue;
535 found = sdata;
536 count++;
537 }
538
539 if (count == 1 && found->u.mgd.powersave) {
540 s32 beaconint_us;
541
542 if (latency < 0)
543 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
544
545 beaconint_us = ieee80211_tu_to_usec(
546 found->vif.bss_conf.beacon_int);
547
548 if (beaconint_us > latency) {
549 local->ps_sdata = NULL;
550 } else {
551 u8 dtimper = found->vif.bss_conf.dtim_period;
552 int maxslp = 1;
553
554 if (dtimper > 1)
555 maxslp = min_t(int, dtimper,
556 latency / beaconint_us);
557
558 local->hw.conf.max_sleep_interval = maxslp;
559 local->ps_sdata = found;
560 }
561 } else {
562 local->ps_sdata = NULL;
563 }
564
565 ieee80211_change_ps(local);
566 }
567
568 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
569 {
570 struct ieee80211_local *local =
571 container_of(work, struct ieee80211_local,
572 dynamic_ps_disable_work);
573
574 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
575 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
576 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
577 }
578
579 ieee80211_wake_queues_by_reason(&local->hw,
580 IEEE80211_QUEUE_STOP_REASON_PS);
581 }
582
583 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
584 {
585 struct ieee80211_local *local =
586 container_of(work, struct ieee80211_local,
587 dynamic_ps_enable_work);
588 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
589
590 /* can only happen when PS was just disabled anyway */
591 if (!sdata)
592 return;
593
594 if (local->hw.conf.flags & IEEE80211_CONF_PS)
595 return;
596
597 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
598 ieee80211_send_nullfunc(local, sdata, 1);
599
600 local->hw.conf.flags |= IEEE80211_CONF_PS;
601 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
602 }
603
604 void ieee80211_dynamic_ps_timer(unsigned long data)
605 {
606 struct ieee80211_local *local = (void *) data;
607
608 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
609 }
610
611 /* MLME */
612 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
613 struct ieee80211_if_managed *ifmgd,
614 u8 *wmm_param, size_t wmm_param_len)
615 {
616 struct ieee80211_tx_queue_params params;
617 size_t left;
618 int count;
619 u8 *pos;
620
621 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
622 return;
623
624 if (!wmm_param)
625 return;
626
627 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
628 return;
629 count = wmm_param[6] & 0x0f;
630 if (count == ifmgd->wmm_last_param_set)
631 return;
632 ifmgd->wmm_last_param_set = count;
633
634 pos = wmm_param + 8;
635 left = wmm_param_len - 8;
636
637 memset(&params, 0, sizeof(params));
638
639 local->wmm_acm = 0;
640 for (; left >= 4; left -= 4, pos += 4) {
641 int aci = (pos[0] >> 5) & 0x03;
642 int acm = (pos[0] >> 4) & 0x01;
643 int queue;
644
645 switch (aci) {
646 case 1: /* AC_BK */
647 queue = 3;
648 if (acm)
649 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
650 break;
651 case 2: /* AC_VI */
652 queue = 1;
653 if (acm)
654 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
655 break;
656 case 3: /* AC_VO */
657 queue = 0;
658 if (acm)
659 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
660 break;
661 case 0: /* AC_BE */
662 default:
663 queue = 2;
664 if (acm)
665 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
666 break;
667 }
668
669 params.aifs = pos[0] & 0x0f;
670 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
671 params.cw_min = ecw2cw(pos[1] & 0x0f);
672 params.txop = get_unaligned_le16(pos + 2);
673 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
674 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
675 "cWmin=%d cWmax=%d txop=%d\n",
676 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
677 params.cw_max, params.txop);
678 #endif
679 if (local->ops->conf_tx &&
680 local->ops->conf_tx(local_to_hw(local), queue, &params)) {
681 printk(KERN_DEBUG "%s: failed to set TX queue "
682 "parameters for queue %d\n", local->mdev->name, queue);
683 }
684 }
685 }
686
687 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
688 u16 capab, bool erp_valid, u8 erp)
689 {
690 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
691 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
692 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
693 #endif
694 u32 changed = 0;
695 bool use_protection;
696 bool use_short_preamble;
697 bool use_short_slot;
698
699 if (erp_valid) {
700 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
701 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
702 } else {
703 use_protection = false;
704 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
705 }
706
707 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
708
709 if (use_protection != bss_conf->use_cts_prot) {
710 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
711 if (net_ratelimit()) {
712 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
713 sdata->dev->name,
714 use_protection ? "enabled" : "disabled",
715 ifmgd->bssid);
716 }
717 #endif
718 bss_conf->use_cts_prot = use_protection;
719 changed |= BSS_CHANGED_ERP_CTS_PROT;
720 }
721
722 if (use_short_preamble != bss_conf->use_short_preamble) {
723 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
724 if (net_ratelimit()) {
725 printk(KERN_DEBUG "%s: switched to %s barker preamble"
726 " (BSSID=%pM)\n",
727 sdata->dev->name,
728 use_short_preamble ? "short" : "long",
729 ifmgd->bssid);
730 }
731 #endif
732 bss_conf->use_short_preamble = use_short_preamble;
733 changed |= BSS_CHANGED_ERP_PREAMBLE;
734 }
735
736 if (use_short_slot != bss_conf->use_short_slot) {
737 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
738 if (net_ratelimit()) {
739 printk(KERN_DEBUG "%s: switched to %s slot time"
740 " (BSSID=%pM)\n",
741 sdata->dev->name,
742 use_short_slot ? "short" : "long",
743 ifmgd->bssid);
744 }
745 #endif
746 bss_conf->use_short_slot = use_short_slot;
747 changed |= BSS_CHANGED_ERP_SLOT;
748 }
749
750 return changed;
751 }
752
753 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
754 {
755 union iwreq_data wrqu;
756
757 memset(&wrqu, 0, sizeof(wrqu));
758 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
759 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
760 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
761 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
762 }
763
764 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
765 {
766 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
767 char *buf;
768 size_t len;
769 int i;
770 union iwreq_data wrqu;
771
772 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
773 return;
774
775 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
776 ifmgd->assocresp_ies_len), GFP_KERNEL);
777 if (!buf)
778 return;
779
780 len = sprintf(buf, "ASSOCINFO(");
781 if (ifmgd->assocreq_ies) {
782 len += sprintf(buf + len, "ReqIEs=");
783 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
784 len += sprintf(buf + len, "%02x",
785 ifmgd->assocreq_ies[i]);
786 }
787 }
788 if (ifmgd->assocresp_ies) {
789 if (ifmgd->assocreq_ies)
790 len += sprintf(buf + len, " ");
791 len += sprintf(buf + len, "RespIEs=");
792 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
793 len += sprintf(buf + len, "%02x",
794 ifmgd->assocresp_ies[i]);
795 }
796 }
797 len += sprintf(buf + len, ")");
798
799 if (len > IW_CUSTOM_MAX) {
800 len = sprintf(buf, "ASSOCRESPIE=");
801 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
802 len += sprintf(buf + len, "%02x",
803 ifmgd->assocresp_ies[i]);
804 }
805 }
806
807 if (len <= IW_CUSTOM_MAX) {
808 memset(&wrqu, 0, sizeof(wrqu));
809 wrqu.data.length = len;
810 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
811 }
812
813 kfree(buf);
814 }
815
816
817 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
818 u32 bss_info_changed)
819 {
820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
821 struct ieee80211_local *local = sdata->local;
822 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
823
824 struct ieee80211_bss *bss;
825
826 bss_info_changed |= BSS_CHANGED_ASSOC;
827 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
828
829 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
830 conf->channel->center_freq,
831 ifmgd->ssid, ifmgd->ssid_len);
832 if (bss) {
833 /* set timing information */
834 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
835 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
836 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
837
838 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
839 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
840
841 cfg80211_hold_bss(&bss->cbss);
842
843 ieee80211_rx_bss_put(local, bss);
844 }
845
846 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
847 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
848 ieee80211_sta_send_associnfo(sdata);
849
850 ifmgd->last_probe = jiffies;
851 ieee80211_led_assoc(local, 1);
852
853 sdata->vif.bss_conf.assoc = 1;
854 /*
855 * For now just always ask the driver to update the basic rateset
856 * when we have associated, we aren't checking whether it actually
857 * changed or not.
858 */
859 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
860 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
861
862 /* will be same as sdata */
863 if (local->ps_sdata) {
864 mutex_lock(&local->iflist_mtx);
865 ieee80211_recalc_ps(local, -1);
866 mutex_unlock(&local->iflist_mtx);
867 }
868
869 netif_tx_start_all_queues(sdata->dev);
870 netif_carrier_on(sdata->dev);
871
872 ieee80211_sta_send_apinfo(sdata);
873 }
874
875 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
876 {
877 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
878 struct ieee80211_local *local = sdata->local;
879
880 ifmgd->direct_probe_tries++;
881 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
882 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
883 sdata->dev->name, ifmgd->bssid);
884 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
885 ieee80211_sta_send_apinfo(sdata);
886
887 /*
888 * Most likely AP is not in the range so remove the
889 * bss information associated to the AP
890 */
891 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
892 sdata->local->hw.conf.channel->center_freq,
893 ifmgd->ssid, ifmgd->ssid_len);
894
895 /*
896 * We might have a pending scan which had no chance to run yet
897 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
898 * Hence, queue the STAs work again
899 */
900 queue_work(local->hw.workqueue, &ifmgd->work);
901 return;
902 }
903
904 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
905 sdata->dev->name, ifmgd->bssid,
906 ifmgd->direct_probe_tries);
907
908 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
909
910 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
911
912 /* Direct probe is sent to broadcast address as some APs
913 * will not answer to direct packet in unassociated state.
914 */
915 ieee80211_send_probe_req(sdata, NULL,
916 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
917
918 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
919 }
920
921
922 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
923 {
924 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
925 struct ieee80211_local *local = sdata->local;
926 u8 *ies;
927 size_t ies_len;
928
929 ifmgd->auth_tries++;
930 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
931 printk(KERN_DEBUG "%s: authentication with AP %pM"
932 " timed out\n",
933 sdata->dev->name, ifmgd->bssid);
934 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
935 ieee80211_sta_send_apinfo(sdata);
936 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
937 sdata->local->hw.conf.channel->center_freq,
938 ifmgd->ssid, ifmgd->ssid_len);
939
940 /*
941 * We might have a pending scan which had no chance to run yet
942 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
943 * Hence, queue the STAs work again
944 */
945 queue_work(local->hw.workqueue, &ifmgd->work);
946 return;
947 }
948
949 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
950 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
951 sdata->dev->name, ifmgd->bssid);
952
953 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
954 ies = ifmgd->sme_auth_ie;
955 ies_len = ifmgd->sme_auth_ie_len;
956 } else {
957 ies = NULL;
958 ies_len = 0;
959 }
960 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
961 ifmgd->bssid, 0);
962 ifmgd->auth_transaction = 2;
963
964 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
965 }
966
967 /*
968 * The disassoc 'reason' argument can be either our own reason
969 * if self disconnected or a reason code from the AP.
970 */
971 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
972 bool deauth, bool self_disconnected,
973 u16 reason)
974 {
975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
976 struct ieee80211_local *local = sdata->local;
977 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
978 struct ieee80211_bss *bss;
979 struct sta_info *sta;
980 u32 changed = 0, config_changed = 0;
981
982 rcu_read_lock();
983
984 sta = sta_info_get(local, ifmgd->bssid);
985 if (!sta) {
986 rcu_read_unlock();
987 return;
988 }
989
990 if (deauth) {
991 ifmgd->direct_probe_tries = 0;
992 ifmgd->auth_tries = 0;
993 }
994 ifmgd->assoc_scan_tries = 0;
995 ifmgd->assoc_tries = 0;
996
997 netif_tx_stop_all_queues(sdata->dev);
998 netif_carrier_off(sdata->dev);
999
1000 ieee80211_sta_tear_down_BA_sessions(sta);
1001
1002 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1003 conf->channel->center_freq,
1004 ifmgd->ssid, ifmgd->ssid_len);
1005
1006 if (bss) {
1007 cfg80211_unhold_bss(&bss->cbss);
1008 ieee80211_rx_bss_put(local, bss);
1009 }
1010
1011 if (self_disconnected) {
1012 if (deauth)
1013 ieee80211_send_deauth_disassoc(sdata,
1014 IEEE80211_STYPE_DEAUTH, reason);
1015 else
1016 ieee80211_send_deauth_disassoc(sdata,
1017 IEEE80211_STYPE_DISASSOC, reason);
1018 }
1019
1020 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1021 changed |= ieee80211_reset_erp_info(sdata);
1022
1023 ieee80211_led_assoc(local, 0);
1024 changed |= BSS_CHANGED_ASSOC;
1025 sdata->vif.bss_conf.assoc = false;
1026
1027 ieee80211_sta_send_apinfo(sdata);
1028
1029 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
1030 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1031 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1032 sdata->local->hw.conf.channel->center_freq,
1033 ifmgd->ssid, ifmgd->ssid_len);
1034 }
1035
1036 rcu_read_unlock();
1037
1038 /* channel(_type) changes are handled by ieee80211_hw_config */
1039 local->oper_channel_type = NL80211_CHAN_NO_HT;
1040
1041 local->power_constr_level = 0;
1042
1043 del_timer_sync(&local->dynamic_ps_timer);
1044 cancel_work_sync(&local->dynamic_ps_enable_work);
1045
1046 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1047 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1048 config_changed |= IEEE80211_CONF_CHANGE_PS;
1049 }
1050
1051 ieee80211_hw_config(local, config_changed);
1052 ieee80211_bss_info_change_notify(sdata, changed);
1053
1054 rcu_read_lock();
1055
1056 sta = sta_info_get(local, ifmgd->bssid);
1057 if (!sta) {
1058 rcu_read_unlock();
1059 return;
1060 }
1061
1062 sta_info_unlink(&sta);
1063
1064 rcu_read_unlock();
1065
1066 sta_info_destroy(sta);
1067 }
1068
1069 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1070 {
1071 if (!sdata || !sdata->default_key ||
1072 sdata->default_key->conf.alg != ALG_WEP)
1073 return 0;
1074 return 1;
1075 }
1076
1077 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1078 {
1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1080 struct ieee80211_local *local = sdata->local;
1081 struct ieee80211_bss *bss;
1082 int bss_privacy;
1083 int wep_privacy;
1084 int privacy_invoked;
1085
1086 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1087 return 0;
1088
1089 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1090 local->hw.conf.channel->center_freq,
1091 ifmgd->ssid, ifmgd->ssid_len);
1092 if (!bss)
1093 return 0;
1094
1095 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1096 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1097 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1098
1099 ieee80211_rx_bss_put(local, bss);
1100
1101 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1102 return 0;
1103
1104 return 1;
1105 }
1106
1107 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1108 {
1109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1110 struct ieee80211_local *local = sdata->local;
1111
1112 ifmgd->assoc_tries++;
1113 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1114 printk(KERN_DEBUG "%s: association with AP %pM"
1115 " timed out\n",
1116 sdata->dev->name, ifmgd->bssid);
1117 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1118 ieee80211_sta_send_apinfo(sdata);
1119 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1120 sdata->local->hw.conf.channel->center_freq,
1121 ifmgd->ssid, ifmgd->ssid_len);
1122 /*
1123 * We might have a pending scan which had no chance to run yet
1124 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1125 * Hence, queue the STAs work again
1126 */
1127 queue_work(local->hw.workqueue, &ifmgd->work);
1128 return;
1129 }
1130
1131 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1132 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1133 sdata->dev->name, ifmgd->bssid);
1134 if (ieee80211_privacy_mismatch(sdata)) {
1135 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1136 "mixed-cell disabled - abort association\n", sdata->dev->name);
1137 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1138 return;
1139 }
1140
1141 ieee80211_send_assoc(sdata);
1142
1143 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1144 }
1145
1146 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1147 struct ieee80211_hdr *hdr)
1148 {
1149 /*
1150 * We can postpone the mgd.timer whenever receiving unicast frames
1151 * from AP because we know that the connection is working both ways
1152 * at that time. But multicast frames (and hence also beacons) must
1153 * be ignored here, because we need to trigger the timer during
1154 * data idle periods for sending the periodical probe request to
1155 * the AP.
1156 */
1157 if (!is_multicast_ether_addr(hdr->addr1))
1158 mod_timer(&sdata->u.mgd.timer,
1159 jiffies + IEEE80211_MONITORING_INTERVAL);
1160 }
1161
1162 void ieee80211_beacon_loss_work(struct work_struct *work)
1163 {
1164 struct ieee80211_sub_if_data *sdata =
1165 container_of(work, struct ieee80211_sub_if_data,
1166 u.mgd.beacon_loss_work);
1167 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1168
1169 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1170 if (net_ratelimit()) {
1171 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1172 "- sending probe request\n", sdata->dev->name,
1173 sdata->u.mgd.bssid);
1174 }
1175 #endif
1176
1177 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1178 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1179 ifmgd->ssid_len, NULL, 0);
1180
1181 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
1182 }
1183
1184 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1185 {
1186 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1187
1188 queue_work(sdata->local->hw.workqueue,
1189 &sdata->u.mgd.beacon_loss_work);
1190 }
1191 EXPORT_SYMBOL(ieee80211_beacon_loss);
1192
1193 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1194 {
1195 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1196 struct ieee80211_local *local = sdata->local;
1197 struct sta_info *sta;
1198 bool disassoc = false;
1199
1200 /* TODO: start monitoring current AP signal quality and number of
1201 * missed beacons. Scan other channels every now and then and search
1202 * for better APs. */
1203 /* TODO: remove expired BSSes */
1204
1205 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1206
1207 rcu_read_lock();
1208
1209 sta = sta_info_get(local, ifmgd->bssid);
1210 if (!sta) {
1211 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1212 sdata->dev->name, ifmgd->bssid);
1213 disassoc = true;
1214 goto unlock;
1215 }
1216
1217 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1218 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1219 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1220 "- disassociating\n",
1221 sdata->dev->name, ifmgd->bssid);
1222 disassoc = true;
1223 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1224 goto unlock;
1225 }
1226
1227 /*
1228 * Beacon filtering is only enabled with power save and then the
1229 * stack should not check for beacon loss.
1230 */
1231 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1232 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1233 time_after(jiffies,
1234 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1235 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1236 if (net_ratelimit()) {
1237 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1238 "- sending probe request\n",
1239 sdata->dev->name, ifmgd->bssid);
1240 }
1241 #endif
1242 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1243 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1244 ifmgd->ssid_len, NULL, 0);
1245 goto unlock;
1246
1247 }
1248
1249 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1250 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1251 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1252 ifmgd->ssid_len, NULL, 0);
1253 }
1254
1255 unlock:
1256 rcu_read_unlock();
1257
1258 if (disassoc)
1259 ieee80211_set_disassoc(sdata, true, true,
1260 WLAN_REASON_PREV_AUTH_NOT_VALID);
1261 else
1262 mod_timer(&ifmgd->timer, jiffies +
1263 IEEE80211_MONITORING_INTERVAL);
1264 }
1265
1266
1267 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1268 {
1269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1270
1271 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1272 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1273 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1274 /* Wait for SME to request association */
1275 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1276 } else
1277 ieee80211_associate(sdata);
1278 }
1279
1280
1281 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1282 struct ieee80211_mgmt *mgmt,
1283 size_t len)
1284 {
1285 u8 *pos;
1286 struct ieee802_11_elems elems;
1287
1288 pos = mgmt->u.auth.variable;
1289 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1290 if (!elems.challenge)
1291 return;
1292 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1293 elems.challenge - 2, elems.challenge_len + 2,
1294 sdata->u.mgd.bssid, 1);
1295 sdata->u.mgd.auth_transaction = 4;
1296 }
1297
1298 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1299 struct ieee80211_mgmt *mgmt,
1300 size_t len)
1301 {
1302 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1303 u16 auth_alg, auth_transaction, status_code;
1304
1305 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1306 return;
1307
1308 if (len < 24 + 6)
1309 return;
1310
1311 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1312 return;
1313
1314 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1315 return;
1316
1317 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1318 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1319 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1320
1321 if (auth_alg != ifmgd->auth_alg ||
1322 auth_transaction != ifmgd->auth_transaction)
1323 return;
1324
1325 if (status_code != WLAN_STATUS_SUCCESS) {
1326 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1327 u8 algs[3];
1328 const int num_algs = ARRAY_SIZE(algs);
1329 int i, pos;
1330 algs[0] = algs[1] = algs[2] = 0xff;
1331 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1332 algs[0] = WLAN_AUTH_OPEN;
1333 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1334 algs[1] = WLAN_AUTH_SHARED_KEY;
1335 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1336 algs[2] = WLAN_AUTH_LEAP;
1337 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1338 pos = 0;
1339 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1340 pos = 1;
1341 else
1342 pos = 2;
1343 for (i = 0; i < num_algs; i++) {
1344 pos++;
1345 if (pos >= num_algs)
1346 pos = 0;
1347 if (algs[pos] == ifmgd->auth_alg ||
1348 algs[pos] == 0xff)
1349 continue;
1350 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1351 !ieee80211_sta_wep_configured(sdata))
1352 continue;
1353 ifmgd->auth_alg = algs[pos];
1354 break;
1355 }
1356 }
1357 return;
1358 }
1359
1360 switch (ifmgd->auth_alg) {
1361 case WLAN_AUTH_OPEN:
1362 case WLAN_AUTH_LEAP:
1363 case WLAN_AUTH_FT:
1364 ieee80211_auth_completed(sdata);
1365 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1366 break;
1367 case WLAN_AUTH_SHARED_KEY:
1368 if (ifmgd->auth_transaction == 4) {
1369 ieee80211_auth_completed(sdata);
1370 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1371 } else
1372 ieee80211_auth_challenge(sdata, mgmt, len);
1373 break;
1374 }
1375 }
1376
1377
1378 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1379 struct ieee80211_mgmt *mgmt,
1380 size_t len)
1381 {
1382 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1383 u16 reason_code;
1384
1385 if (len < 24 + 2)
1386 return;
1387
1388 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1389 return;
1390
1391 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1392
1393 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1394 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1395 sdata->dev->name, reason_code);
1396
1397 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1398 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1399 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1400 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1401 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1402 mod_timer(&ifmgd->timer, jiffies +
1403 IEEE80211_RETRY_AUTH_INTERVAL);
1404 }
1405
1406 ieee80211_set_disassoc(sdata, true, false, 0);
1407 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1408 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1409 }
1410
1411
1412 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1413 struct ieee80211_mgmt *mgmt,
1414 size_t len)
1415 {
1416 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1417 u16 reason_code;
1418
1419 if (len < 24 + 2)
1420 return;
1421
1422 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1423 return;
1424
1425 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1426
1427 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1428 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1429 sdata->dev->name, reason_code);
1430
1431 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1432 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1433 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1434 mod_timer(&ifmgd->timer, jiffies +
1435 IEEE80211_RETRY_AUTH_INTERVAL);
1436 }
1437
1438 ieee80211_set_disassoc(sdata, false, false, reason_code);
1439 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1440 }
1441
1442
1443 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1444 struct ieee80211_mgmt *mgmt,
1445 size_t len,
1446 int reassoc)
1447 {
1448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1449 struct ieee80211_local *local = sdata->local;
1450 struct ieee80211_supported_band *sband;
1451 struct sta_info *sta;
1452 u32 rates, basic_rates;
1453 u16 capab_info, status_code, aid;
1454 struct ieee802_11_elems elems;
1455 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1456 u8 *pos;
1457 u32 changed = 0;
1458 int i, j;
1459 bool have_higher_than_11mbit = false, newsta = false;
1460 u16 ap_ht_cap_flags;
1461
1462 /* AssocResp and ReassocResp have identical structure, so process both
1463 * of them in this function. */
1464
1465 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1466 return;
1467
1468 if (len < 24 + 6)
1469 return;
1470
1471 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1472 return;
1473
1474 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1475 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1476 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1477
1478 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1479 "status=%d aid=%d)\n",
1480 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1481 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1482
1483 pos = mgmt->u.assoc_resp.variable;
1484 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1485
1486 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1487 elems.timeout_int && elems.timeout_int_len == 5 &&
1488 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1489 u32 tu, ms;
1490 tu = get_unaligned_le32(elems.timeout_int + 1);
1491 ms = tu * 1024 / 1000;
1492 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1493 "comeback duration %u TU (%u ms)\n",
1494 sdata->dev->name, tu, ms);
1495 if (ms > IEEE80211_ASSOC_TIMEOUT)
1496 mod_timer(&ifmgd->timer,
1497 jiffies + msecs_to_jiffies(ms));
1498 return;
1499 }
1500
1501 if (status_code != WLAN_STATUS_SUCCESS) {
1502 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1503 sdata->dev->name, status_code);
1504 /* if this was a reassociation, ensure we try a "full"
1505 * association next time. This works around some broken APs
1506 * which do not correctly reject reassociation requests. */
1507 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1508 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1509 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1510 /* Wait for SME to decide what to do next */
1511 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1512 }
1513 return;
1514 }
1515
1516 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1517 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1518 "set\n", sdata->dev->name, aid);
1519 aid &= ~(BIT(15) | BIT(14));
1520
1521 if (!elems.supp_rates) {
1522 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1523 sdata->dev->name);
1524 return;
1525 }
1526
1527 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1528 ifmgd->aid = aid;
1529 ifmgd->ap_capab = capab_info;
1530
1531 kfree(ifmgd->assocresp_ies);
1532 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1533 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1534 if (ifmgd->assocresp_ies)
1535 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1536
1537 rcu_read_lock();
1538
1539 /* Add STA entry for the AP */
1540 sta = sta_info_get(local, ifmgd->bssid);
1541 if (!sta) {
1542 newsta = true;
1543
1544 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1545 if (!sta) {
1546 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1547 " the AP\n", sdata->dev->name);
1548 rcu_read_unlock();
1549 return;
1550 }
1551
1552 /* update new sta with its last rx activity */
1553 sta->last_rx = jiffies;
1554 }
1555
1556 /*
1557 * FIXME: Do we really need to update the sta_info's information here?
1558 * We already know about the AP (we found it in our list) so it
1559 * should already be filled with the right info, no?
1560 * As is stands, all this is racy because typically we assume
1561 * the information that is filled in here (except flags) doesn't
1562 * change while a STA structure is alive. As such, it should move
1563 * to between the sta_info_alloc() and sta_info_insert() above.
1564 */
1565
1566 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1567 WLAN_STA_AUTHORIZED);
1568
1569 rates = 0;
1570 basic_rates = 0;
1571 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1572
1573 for (i = 0; i < elems.supp_rates_len; i++) {
1574 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1575 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1576
1577 if (rate > 110)
1578 have_higher_than_11mbit = true;
1579
1580 for (j = 0; j < sband->n_bitrates; j++) {
1581 if (sband->bitrates[j].bitrate == rate) {
1582 rates |= BIT(j);
1583 if (is_basic)
1584 basic_rates |= BIT(j);
1585 break;
1586 }
1587 }
1588 }
1589
1590 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1591 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1592 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1593
1594 if (rate > 110)
1595 have_higher_than_11mbit = true;
1596
1597 for (j = 0; j < sband->n_bitrates; j++) {
1598 if (sband->bitrates[j].bitrate == rate) {
1599 rates |= BIT(j);
1600 if (is_basic)
1601 basic_rates |= BIT(j);
1602 break;
1603 }
1604 }
1605 }
1606
1607 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1608 sdata->vif.bss_conf.basic_rates = basic_rates;
1609
1610 /* cf. IEEE 802.11 9.2.12 */
1611 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1612 have_higher_than_11mbit)
1613 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1614 else
1615 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1616
1617 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1618 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1619 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1620 elems.ht_cap_elem, &sta->sta.ht_cap);
1621
1622 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1623
1624 rate_control_rate_init(sta);
1625
1626 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1627 set_sta_flags(sta, WLAN_STA_MFP);
1628
1629 if (elems.wmm_param)
1630 set_sta_flags(sta, WLAN_STA_WME);
1631
1632 if (newsta) {
1633 int err = sta_info_insert(sta);
1634 if (err) {
1635 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1636 " the AP (error %d)\n", sdata->dev->name, err);
1637 rcu_read_unlock();
1638 return;
1639 }
1640 }
1641
1642 rcu_read_unlock();
1643
1644 if (elems.wmm_param)
1645 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1646 elems.wmm_param_len);
1647
1648 if (elems.ht_info_elem && elems.wmm_param &&
1649 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1650 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1651 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1652 ap_ht_cap_flags);
1653
1654 /* set AID and assoc capability,
1655 * ieee80211_set_associated() will tell the driver */
1656 bss_conf->aid = aid;
1657 bss_conf->assoc_capability = capab_info;
1658 ieee80211_set_associated(sdata, changed);
1659
1660 /*
1661 * initialise the time of last beacon to be the association time,
1662 * otherwise beacon loss check will trigger immediately
1663 */
1664 ifmgd->last_beacon = jiffies;
1665
1666 ieee80211_associated(sdata);
1667 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1668 }
1669
1670
1671 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1672 struct ieee80211_mgmt *mgmt,
1673 size_t len,
1674 struct ieee80211_rx_status *rx_status,
1675 struct ieee802_11_elems *elems,
1676 bool beacon)
1677 {
1678 struct ieee80211_local *local = sdata->local;
1679 int freq;
1680 struct ieee80211_bss *bss;
1681 struct ieee80211_channel *channel;
1682
1683 if (elems->ds_params && elems->ds_params_len == 1)
1684 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1685 else
1686 freq = rx_status->freq;
1687
1688 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1689
1690 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1691 return;
1692
1693 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1694 channel, beacon);
1695 if (!bss)
1696 return;
1697
1698 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1699 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1700 struct ieee80211_channel_sw_ie *sw_elem =
1701 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1702 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1703 }
1704
1705 ieee80211_rx_bss_put(local, bss);
1706 }
1707
1708
1709 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1710 struct ieee80211_mgmt *mgmt,
1711 size_t len,
1712 struct ieee80211_rx_status *rx_status)
1713 {
1714 struct ieee80211_if_managed *ifmgd;
1715 size_t baselen;
1716 struct ieee802_11_elems elems;
1717
1718 ifmgd = &sdata->u.mgd;
1719
1720 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1721 return; /* ignore ProbeResp to foreign address */
1722
1723 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1724 if (baselen > len)
1725 return;
1726
1727 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1728 &elems);
1729
1730 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1731
1732 /* direct probe may be part of the association flow */
1733 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1734 &ifmgd->request)) {
1735 printk(KERN_DEBUG "%s direct probe responded\n",
1736 sdata->dev->name);
1737 ieee80211_authenticate(sdata);
1738 }
1739
1740 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1741 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1742 }
1743
1744 /*
1745 * This is the canonical list of information elements we care about,
1746 * the filter code also gives us all changes to the Microsoft OUI
1747 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1748 *
1749 * We implement beacon filtering in software since that means we can
1750 * avoid processing the frame here and in cfg80211, and userspace
1751 * will not be able to tell whether the hardware supports it or not.
1752 *
1753 * XXX: This list needs to be dynamic -- userspace needs to be able to
1754 * add items it requires. It also needs to be able to tell us to
1755 * look out for other vendor IEs.
1756 */
1757 static const u64 care_about_ies =
1758 (1ULL << WLAN_EID_COUNTRY) |
1759 (1ULL << WLAN_EID_ERP_INFO) |
1760 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1761 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1762 (1ULL << WLAN_EID_HT_CAPABILITY) |
1763 (1ULL << WLAN_EID_HT_INFORMATION);
1764
1765 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1766 struct ieee80211_mgmt *mgmt,
1767 size_t len,
1768 struct ieee80211_rx_status *rx_status)
1769 {
1770 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1771 size_t baselen;
1772 struct ieee802_11_elems elems;
1773 struct ieee80211_local *local = sdata->local;
1774 u32 changed = 0;
1775 bool erp_valid, directed_tim = false;
1776 u8 erp_value = 0;
1777 u32 ncrc;
1778
1779 /* Process beacon from the current BSS */
1780 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1781 if (baselen > len)
1782 return;
1783
1784 if (rx_status->freq != local->hw.conf.channel->center_freq)
1785 return;
1786
1787 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1788 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1789 return;
1790
1791 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1792 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1793 len - baselen, &elems,
1794 care_about_ies, ncrc);
1795
1796 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1797 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1798 ifmgd->aid);
1799
1800 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1801
1802 if (ncrc == ifmgd->beacon_crc)
1803 return;
1804 ifmgd->beacon_crc = ncrc;
1805
1806 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1807
1808 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1809 elems.wmm_param_len);
1810
1811 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1812 if (directed_tim) {
1813 if (local->hw.conf.dynamic_ps_timeout > 0) {
1814 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1815 ieee80211_hw_config(local,
1816 IEEE80211_CONF_CHANGE_PS);
1817 ieee80211_send_nullfunc(local, sdata, 0);
1818 } else {
1819 local->pspolling = true;
1820
1821 /*
1822 * Here is assumed that the driver will be
1823 * able to send ps-poll frame and receive a
1824 * response even though power save mode is
1825 * enabled, but some drivers might require
1826 * to disable power save here. This needs
1827 * to be investigated.
1828 */
1829 ieee80211_send_pspoll(local, sdata);
1830 }
1831 }
1832 }
1833
1834 if (elems.erp_info && elems.erp_info_len >= 1) {
1835 erp_valid = true;
1836 erp_value = elems.erp_info[0];
1837 } else {
1838 erp_valid = false;
1839 }
1840 changed |= ieee80211_handle_bss_capability(sdata,
1841 le16_to_cpu(mgmt->u.beacon.capab_info),
1842 erp_valid, erp_value);
1843
1844
1845 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1846 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1847 struct sta_info *sta;
1848 struct ieee80211_supported_band *sband;
1849 u16 ap_ht_cap_flags;
1850
1851 rcu_read_lock();
1852
1853 sta = sta_info_get(local, ifmgd->bssid);
1854 if (!sta) {
1855 rcu_read_unlock();
1856 return;
1857 }
1858
1859 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1860
1861 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1862 elems.ht_cap_elem, &sta->sta.ht_cap);
1863
1864 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1865
1866 rcu_read_unlock();
1867
1868 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1869 ap_ht_cap_flags);
1870 }
1871
1872 if (elems.country_elem) {
1873 /* Note we are only reviewing this on beacons
1874 * for the BSSID we are associated to */
1875 regulatory_hint_11d(local->hw.wiphy,
1876 elems.country_elem, elems.country_elem_len);
1877
1878 /* TODO: IBSS also needs this */
1879 if (elems.pwr_constr_elem)
1880 ieee80211_handle_pwr_constr(sdata,
1881 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1882 elems.pwr_constr_elem,
1883 elems.pwr_constr_elem_len);
1884 }
1885
1886 ieee80211_bss_info_change_notify(sdata, changed);
1887 }
1888
1889 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1890 struct sk_buff *skb,
1891 struct ieee80211_rx_status *rx_status)
1892 {
1893 struct ieee80211_local *local = sdata->local;
1894 struct ieee80211_mgmt *mgmt;
1895 u16 fc;
1896
1897 if (skb->len < 24)
1898 return RX_DROP_MONITOR;
1899
1900 mgmt = (struct ieee80211_mgmt *) skb->data;
1901 fc = le16_to_cpu(mgmt->frame_control);
1902
1903 switch (fc & IEEE80211_FCTL_STYPE) {
1904 case IEEE80211_STYPE_PROBE_REQ:
1905 case IEEE80211_STYPE_PROBE_RESP:
1906 case IEEE80211_STYPE_BEACON:
1907 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1908 case IEEE80211_STYPE_AUTH:
1909 case IEEE80211_STYPE_ASSOC_RESP:
1910 case IEEE80211_STYPE_REASSOC_RESP:
1911 case IEEE80211_STYPE_DEAUTH:
1912 case IEEE80211_STYPE_DISASSOC:
1913 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1914 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1915 return RX_QUEUED;
1916 }
1917
1918 return RX_DROP_MONITOR;
1919 }
1920
1921 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1922 struct sk_buff *skb)
1923 {
1924 struct ieee80211_rx_status *rx_status;
1925 struct ieee80211_mgmt *mgmt;
1926 u16 fc;
1927
1928 rx_status = (struct ieee80211_rx_status *) skb->cb;
1929 mgmt = (struct ieee80211_mgmt *) skb->data;
1930 fc = le16_to_cpu(mgmt->frame_control);
1931
1932 switch (fc & IEEE80211_FCTL_STYPE) {
1933 case IEEE80211_STYPE_PROBE_RESP:
1934 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1935 rx_status);
1936 break;
1937 case IEEE80211_STYPE_BEACON:
1938 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1939 rx_status);
1940 break;
1941 case IEEE80211_STYPE_AUTH:
1942 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1943 break;
1944 case IEEE80211_STYPE_ASSOC_RESP:
1945 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1946 break;
1947 case IEEE80211_STYPE_REASSOC_RESP:
1948 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1949 break;
1950 case IEEE80211_STYPE_DEAUTH:
1951 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1952 break;
1953 case IEEE80211_STYPE_DISASSOC:
1954 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1955 break;
1956 }
1957
1958 kfree_skb(skb);
1959 }
1960
1961 static void ieee80211_sta_timer(unsigned long data)
1962 {
1963 struct ieee80211_sub_if_data *sdata =
1964 (struct ieee80211_sub_if_data *) data;
1965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1966 struct ieee80211_local *local = sdata->local;
1967
1968 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1969 queue_work(local->hw.workqueue, &ifmgd->work);
1970 }
1971
1972 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1973 {
1974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1975 struct ieee80211_local *local = sdata->local;
1976
1977 if (local->ops->reset_tsf) {
1978 /* Reset own TSF to allow time synchronization work. */
1979 local->ops->reset_tsf(local_to_hw(local));
1980 }
1981
1982 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
1983
1984
1985 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1986 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1987 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1988 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1989 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1990 ifmgd->auth_alg = WLAN_AUTH_LEAP;
1991 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
1992 ifmgd->auth_alg = WLAN_AUTH_FT;
1993 else
1994 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1995 ifmgd->auth_transaction = -1;
1996 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1997 ifmgd->assoc_scan_tries = 0;
1998 ifmgd->direct_probe_tries = 0;
1999 ifmgd->auth_tries = 0;
2000 ifmgd->assoc_tries = 0;
2001 netif_tx_stop_all_queues(sdata->dev);
2002 netif_carrier_off(sdata->dev);
2003 }
2004
2005 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2006 {
2007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2008 struct ieee80211_local *local = sdata->local;
2009 struct ieee80211_bss *bss;
2010 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2011 u8 ssid_len = ifmgd->ssid_len;
2012 u16 capa_mask = WLAN_CAPABILITY_ESS;
2013 u16 capa_val = WLAN_CAPABILITY_ESS;
2014 struct ieee80211_channel *chan = local->oper_channel;
2015
2016 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2017 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2018 IEEE80211_STA_AUTO_BSSID_SEL |
2019 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2020 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2021 if (sdata->default_key)
2022 capa_val |= WLAN_CAPABILITY_PRIVACY;
2023 }
2024
2025 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2026 chan = NULL;
2027
2028 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2029 bssid = NULL;
2030
2031 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2032 ssid = NULL;
2033 ssid_len = 0;
2034 }
2035
2036 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2037 bssid, ssid, ssid_len,
2038 capa_mask, capa_val);
2039
2040 if (bss) {
2041 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2042 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2043 ieee80211_sta_set_ssid(sdata, bss->ssid,
2044 bss->ssid_len);
2045 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2046 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2047 bss->supp_rates);
2048 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2049 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2050 else
2051 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2052
2053 /* Send out direct probe if no probe resp was received or
2054 * the one we have is outdated
2055 */
2056 if (!bss->last_probe_resp ||
2057 time_after(jiffies, bss->last_probe_resp
2058 + IEEE80211_SCAN_RESULT_EXPIRE))
2059 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2060 else
2061 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2062
2063 ieee80211_rx_bss_put(local, bss);
2064 ieee80211_sta_reset_auth(sdata);
2065 return 0;
2066 } else {
2067 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2068 ifmgd->assoc_scan_tries++;
2069 /* XXX maybe racy? */
2070 if (local->scan_req)
2071 return -1;
2072 memcpy(local->int_scan_req.ssids[0].ssid,
2073 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
2074 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
2075 local->int_scan_req.ssids[0].ssid_len = 0;
2076 else
2077 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
2078
2079 if (ieee80211_start_scan(sdata, &local->int_scan_req))
2080 ieee80211_scan_failed(local);
2081
2082 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2083 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2084 } else {
2085 ifmgd->assoc_scan_tries = 0;
2086 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2087 }
2088 }
2089 return -1;
2090 }
2091
2092
2093 static void ieee80211_sta_work(struct work_struct *work)
2094 {
2095 struct ieee80211_sub_if_data *sdata =
2096 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2097 struct ieee80211_local *local = sdata->local;
2098 struct ieee80211_if_managed *ifmgd;
2099 struct sk_buff *skb;
2100
2101 if (!netif_running(sdata->dev))
2102 return;
2103
2104 if (local->sw_scanning || local->hw_scanning)
2105 return;
2106
2107 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2108 return;
2109 ifmgd = &sdata->u.mgd;
2110
2111 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2112 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2113
2114 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2115 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2116 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2117 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2118 /*
2119 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
2120 * (which queued ieee80211_sta_work) did not return an error. Thus, call
2121 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
2122 * notify the scan requester.
2123 */
2124 if (ieee80211_start_scan(sdata, local->scan_req))
2125 ieee80211_scan_failed(local);
2126 return;
2127 }
2128
2129 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2130 if (ieee80211_sta_config_auth(sdata))
2131 return;
2132 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2133 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2134 return;
2135
2136 switch (ifmgd->state) {
2137 case IEEE80211_STA_MLME_DISABLED:
2138 break;
2139 case IEEE80211_STA_MLME_DIRECT_PROBE:
2140 ieee80211_direct_probe(sdata);
2141 break;
2142 case IEEE80211_STA_MLME_AUTHENTICATE:
2143 ieee80211_authenticate(sdata);
2144 break;
2145 case IEEE80211_STA_MLME_ASSOCIATE:
2146 ieee80211_associate(sdata);
2147 break;
2148 case IEEE80211_STA_MLME_ASSOCIATED:
2149 ieee80211_associated(sdata);
2150 break;
2151 default:
2152 WARN_ON(1);
2153 break;
2154 }
2155
2156 if (ieee80211_privacy_mismatch(sdata)) {
2157 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2158 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2159
2160 ieee80211_set_disassoc(sdata, false, true,
2161 WLAN_REASON_UNSPECIFIED);
2162 }
2163 }
2164
2165 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2166 {
2167 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2168 /*
2169 * Need to update last_beacon to avoid beacon loss
2170 * test to trigger.
2171 */
2172 sdata->u.mgd.last_beacon = jiffies;
2173
2174
2175 queue_work(sdata->local->hw.workqueue,
2176 &sdata->u.mgd.work);
2177 }
2178 }
2179
2180 /* interface setup */
2181 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2182 {
2183 struct ieee80211_if_managed *ifmgd;
2184 u32 hw_flags;
2185
2186 ifmgd = &sdata->u.mgd;
2187 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2188 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
2189 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
2190 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
2191 (unsigned long) sdata);
2192 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
2193 (unsigned long) sdata);
2194 skb_queue_head_init(&ifmgd->skb_queue);
2195
2196 ifmgd->capab = WLAN_CAPABILITY_ESS;
2197 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2198 IEEE80211_AUTH_ALG_SHARED_KEY;
2199 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
2200 IEEE80211_STA_AUTO_BSSID_SEL |
2201 IEEE80211_STA_AUTO_CHANNEL_SEL;
2202 if (sdata->local->hw.queues >= 4)
2203 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
2204
2205 hw_flags = sdata->local->hw.flags;
2206
2207 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2208 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2209 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2210 }
2211 }
2212
2213 /* configuration hooks */
2214 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
2215 {
2216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2217 struct ieee80211_local *local = sdata->local;
2218
2219 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2220 return;
2221
2222 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
2223 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2224 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
2225 IEEE80211_STA_AUTO_SSID_SEL))) {
2226
2227 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2228 ieee80211_set_disassoc(sdata, true, true,
2229 WLAN_REASON_DEAUTH_LEAVING);
2230
2231 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2232 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2233 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2234 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2235 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2236 queue_work(local->hw.workqueue, &ifmgd->work);
2237 }
2238 }
2239
2240 int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2241 {
2242 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2243
2244 if (ifmgd->ssid_len)
2245 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2246 else
2247 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2248
2249 return 0;
2250 }
2251
2252 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2253 {
2254 struct ieee80211_if_managed *ifmgd;
2255
2256 if (len > IEEE80211_MAX_SSID_LEN)
2257 return -EINVAL;
2258
2259 ifmgd = &sdata->u.mgd;
2260
2261 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
2262 /*
2263 * Do not use reassociation if SSID is changed (different ESS).
2264 */
2265 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2266 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2267 memcpy(ifmgd->ssid, ssid, len);
2268 ifmgd->ssid_len = len;
2269 }
2270
2271 return ieee80211_sta_commit(sdata);
2272 }
2273
2274 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2275 {
2276 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2277 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2278 *len = ifmgd->ssid_len;
2279 return 0;
2280 }
2281
2282 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2283 {
2284 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2285
2286 if (is_valid_ether_addr(bssid)) {
2287 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2288 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
2289 } else {
2290 memset(ifmgd->bssid, 0, ETH_ALEN);
2291 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
2292 }
2293
2294 if (netif_running(sdata->dev)) {
2295 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
2296 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2297 "the low-level driver\n", sdata->dev->name);
2298 }
2299 }
2300
2301 return ieee80211_sta_commit(sdata);
2302 }
2303
2304 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2305 const char *ie, size_t len)
2306 {
2307 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2308
2309 kfree(ifmgd->extra_ie);
2310 if (len == 0) {
2311 ifmgd->extra_ie = NULL;
2312 ifmgd->extra_ie_len = 0;
2313 return 0;
2314 }
2315 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2316 if (!ifmgd->extra_ie) {
2317 ifmgd->extra_ie_len = 0;
2318 return -ENOMEM;
2319 }
2320 memcpy(ifmgd->extra_ie, ie, len);
2321 ifmgd->extra_ie_len = len;
2322 return 0;
2323 }
2324
2325 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2326 {
2327 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2328 sdata->dev->name, reason);
2329
2330 ieee80211_set_disassoc(sdata, true, true, reason);
2331 return 0;
2332 }
2333
2334 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2335 {
2336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2337
2338 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2339 sdata->dev->name, reason);
2340
2341 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2342 return -ENOLINK;
2343
2344 ieee80211_set_disassoc(sdata, false, true, reason);
2345 return 0;
2346 }
2347
2348 /* scan finished notification */
2349 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2350 {
2351 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2352
2353 /* Restart STA timers */
2354 rcu_read_lock();
2355 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2356 ieee80211_restart_sta_timer(sdata);
2357 rcu_read_unlock();
2358 }
2359
2360 int ieee80211_max_network_latency(struct notifier_block *nb,
2361 unsigned long data, void *dummy)
2362 {
2363 s32 latency_usec = (s32) data;
2364 struct ieee80211_local *local =
2365 container_of(nb, struct ieee80211_local,
2366 network_latency_notifier);
2367
2368 mutex_lock(&local->iflist_mtx);
2369 ieee80211_recalc_ps(local, latency_usec);
2370 mutex_unlock(&local->iflist_mtx);
2371
2372 return 0;
2373 }
ubuntu-bionic-kernel mirror