]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - net/mac80211/mlme.c
projects / mirror_ubuntu-zesty-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
wext: remove seq_start/stop sparse annotations
[mirror_ubuntu-zesty-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 "driver-ops.h"
27 #include "rate.h"
28 #include "led.h"
29
30 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
37 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38
39 /* utils */
40 static int ecw2cw(int ecw)
41 {
42 return (1 << ecw) - 1;
43 }
44
45 static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
46 {
47 u8 *end, *pos;
48
49 pos = bss->cbss.information_elements;
50 if (pos == NULL)
51 return NULL;
52 end = pos + bss->cbss.len_information_elements;
53
54 while (pos + 1 < end) {
55 if (pos + 2 + pos[1] > end)
56 break;
57 if (pos[0] == ie)
58 return pos;
59 pos += 2 + pos[1];
60 }
61
62 return NULL;
63 }
64
65 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
66 struct ieee80211_supported_band *sband,
67 u32 *rates)
68 {
69 int i, j, count;
70 *rates = 0;
71 count = 0;
72 for (i = 0; i < bss->supp_rates_len; i++) {
73 int rate = (bss->supp_rates[i] & 0x7F) * 5;
74
75 for (j = 0; j < sband->n_bitrates; j++)
76 if (sband->bitrates[j].bitrate == rate) {
77 *rates |= BIT(j);
78 count++;
79 break;
80 }
81 }
82
83 return count;
84 }
85
86 /*
87 * ieee80211_enable_ht should be called only after the operating band
88 * has been determined as ht configuration depends on the hw's
89 * HT abilities for a specific band.
90 */
91 static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
92 struct ieee80211_ht_info *hti,
93 u16 ap_ht_cap_flags)
94 {
95 struct ieee80211_local *local = sdata->local;
96 struct ieee80211_supported_band *sband;
97 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
98 struct sta_info *sta;
99 u32 changed = 0;
100 u16 ht_opmode;
101 bool enable_ht = true, ht_changed;
102 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
103
104 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
105
106 /* HT is not supported */
107 if (!sband->ht_cap.ht_supported)
108 enable_ht = false;
109
110 /* check that channel matches the right operating channel */
111 if (local->hw.conf.channel->center_freq !=
112 ieee80211_channel_to_frequency(hti->control_chan))
113 enable_ht = false;
114
115 if (enable_ht) {
116 channel_type = NL80211_CHAN_HT20;
117
118 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
119 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
120 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
121 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
122 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
123 channel_type = NL80211_CHAN_HT40PLUS;
124 break;
125 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
126 channel_type = NL80211_CHAN_HT40MINUS;
127 break;
128 }
129 }
130 }
131
132 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
133 channel_type != local->hw.conf.channel_type;
134
135 local->oper_channel_type = channel_type;
136
137 if (ht_changed) {
138 /* channel_type change automatically detected */
139 ieee80211_hw_config(local, 0);
140
141 rcu_read_lock();
142
143 sta = sta_info_get(local, ifmgd->bssid);
144 if (sta)
145 rate_control_rate_update(local, sband, sta,
146 IEEE80211_RC_HT_CHANGED);
147
148 rcu_read_unlock();
149 }
150
151 /* disable HT */
152 if (!enable_ht)
153 return 0;
154
155 ht_opmode = le16_to_cpu(hti->operation_mode);
156
157 /* if bss configuration changed store the new one */
158 if (!sdata->ht_opmode_valid ||
159 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
160 changed |= BSS_CHANGED_HT;
161 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
162 sdata->ht_opmode_valid = true;
163 }
164
165 return changed;
166 }
167
168 /* frame sending functions */
169
170 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
171 {
172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
173 struct ieee80211_local *local = sdata->local;
174 struct sk_buff *skb;
175 struct ieee80211_mgmt *mgmt;
176 u8 *pos, *ies, *ht_ie;
177 int i, len, count, rates_len, supp_rates_len;
178 u16 capab;
179 struct ieee80211_bss *bss;
180 int wmm = 0;
181 struct ieee80211_supported_band *sband;
182 u32 rates = 0;
183
184 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
185 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
186 ifmgd->ssid_len);
187 if (!skb) {
188 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
189 "frame\n", sdata->dev->name);
190 return;
191 }
192 skb_reserve(skb, local->hw.extra_tx_headroom);
193
194 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
195
196 capab = ifmgd->capab;
197
198 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
199 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
200 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
201 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
202 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
203 }
204
205 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
206 local->hw.conf.channel->center_freq,
207 ifmgd->ssid, ifmgd->ssid_len);
208 if (bss) {
209 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
210 capab |= WLAN_CAPABILITY_PRIVACY;
211 if (bss->wmm_used)
212 wmm = 1;
213
214 /* get all rates supported by the device and the AP as
215 * some APs don't like getting a superset of their rates
216 * in the association request (e.g. D-Link DAP 1353 in
217 * b-only mode) */
218 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
219
220 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
221 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
222 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
223
224 ieee80211_rx_bss_put(local, bss);
225 } else {
226 rates = ~0;
227 rates_len = sband->n_bitrates;
228 }
229
230 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
231 memset(mgmt, 0, 24);
232 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
233 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
234 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
235
236 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
237 skb_put(skb, 10);
238 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
239 IEEE80211_STYPE_REASSOC_REQ);
240 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
241 mgmt->u.reassoc_req.listen_interval =
242 cpu_to_le16(local->hw.conf.listen_interval);
243 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
244 ETH_ALEN);
245 } else {
246 skb_put(skb, 4);
247 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
248 IEEE80211_STYPE_ASSOC_REQ);
249 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
250 mgmt->u.assoc_req.listen_interval =
251 cpu_to_le16(local->hw.conf.listen_interval);
252 }
253
254 /* SSID */
255 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
256 *pos++ = WLAN_EID_SSID;
257 *pos++ = ifmgd->ssid_len;
258 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
259
260 /* add all rates which were marked to be used above */
261 supp_rates_len = rates_len;
262 if (supp_rates_len > 8)
263 supp_rates_len = 8;
264
265 len = sband->n_bitrates;
266 pos = skb_put(skb, supp_rates_len + 2);
267 *pos++ = WLAN_EID_SUPP_RATES;
268 *pos++ = supp_rates_len;
269
270 count = 0;
271 for (i = 0; i < sband->n_bitrates; i++) {
272 if (BIT(i) & rates) {
273 int rate = sband->bitrates[i].bitrate;
274 *pos++ = (u8) (rate / 5);
275 if (++count == 8)
276 break;
277 }
278 }
279
280 if (rates_len > count) {
281 pos = skb_put(skb, rates_len - count + 2);
282 *pos++ = WLAN_EID_EXT_SUPP_RATES;
283 *pos++ = rates_len - count;
284
285 for (i++; i < sband->n_bitrates; i++) {
286 if (BIT(i) & rates) {
287 int rate = sband->bitrates[i].bitrate;
288 *pos++ = (u8) (rate / 5);
289 }
290 }
291 }
292
293 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
294 /* 1. power capabilities */
295 pos = skb_put(skb, 4);
296 *pos++ = WLAN_EID_PWR_CAPABILITY;
297 *pos++ = 2;
298 *pos++ = 0; /* min tx power */
299 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
300
301 /* 2. supported channels */
302 /* TODO: get this in reg domain format */
303 pos = skb_put(skb, 2 * sband->n_channels + 2);
304 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
305 *pos++ = 2 * sband->n_channels;
306 for (i = 0; i < sband->n_channels; i++) {
307 *pos++ = ieee80211_frequency_to_channel(
308 sband->channels[i].center_freq);
309 *pos++ = 1; /* one channel in the subband*/
310 }
311 }
312
313 if (ifmgd->extra_ie) {
314 pos = skb_put(skb, ifmgd->extra_ie_len);
315 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
316 }
317
318 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
319 pos = skb_put(skb, 9);
320 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
321 *pos++ = 7; /* len */
322 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
323 *pos++ = 0x50;
324 *pos++ = 0xf2;
325 *pos++ = 2; /* WME */
326 *pos++ = 0; /* WME info */
327 *pos++ = 1; /* WME ver */
328 *pos++ = 0;
329 }
330
331 /* wmm support is a must to HT */
332 /*
333 * IEEE802.11n does not allow TKIP/WEP as pairwise
334 * ciphers in HT mode. We still associate in non-ht
335 * mode (11a/b/g) if any one of these ciphers is
336 * configured as pairwise.
337 */
338 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
339 sband->ht_cap.ht_supported &&
340 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
341 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
342 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
343 struct ieee80211_ht_info *ht_info =
344 (struct ieee80211_ht_info *)(ht_ie + 2);
345 u16 cap = sband->ht_cap.cap;
346 __le16 tmp;
347 u32 flags = local->hw.conf.channel->flags;
348
349 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
350 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
351 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
352 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
353 cap &= ~IEEE80211_HT_CAP_SGI_40;
354 }
355 break;
356 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
357 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
358 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
359 cap &= ~IEEE80211_HT_CAP_SGI_40;
360 }
361 break;
362 }
363
364 tmp = cpu_to_le16(cap);
365 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
366 *pos++ = WLAN_EID_HT_CAPABILITY;
367 *pos++ = sizeof(struct ieee80211_ht_cap);
368 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
369 memcpy(pos, &tmp, sizeof(u16));
370 pos += sizeof(u16);
371 /* TODO: needs a define here for << 2 */
372 *pos++ = sband->ht_cap.ampdu_factor |
373 (sband->ht_cap.ampdu_density << 2);
374 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
375 }
376
377 kfree(ifmgd->assocreq_ies);
378 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
379 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
380 if (ifmgd->assocreq_ies)
381 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
382
383 ieee80211_tx_skb(sdata, skb, 0);
384 }
385
386
387 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
388 u16 stype, u16 reason)
389 {
390 struct ieee80211_local *local = sdata->local;
391 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
392 struct sk_buff *skb;
393 struct ieee80211_mgmt *mgmt;
394
395 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
396 if (!skb) {
397 printk(KERN_DEBUG "%s: failed to allocate buffer for "
398 "deauth/disassoc frame\n", sdata->dev->name);
399 return;
400 }
401 skb_reserve(skb, local->hw.extra_tx_headroom);
402
403 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
404 memset(mgmt, 0, 24);
405 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
406 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
407 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
408 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
409 skb_put(skb, 2);
410 /* u.deauth.reason_code == u.disassoc.reason_code */
411 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
412
413 if (stype == IEEE80211_STYPE_DEAUTH)
414 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
415 else
416 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
417 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
418 }
419
420 void ieee80211_send_pspoll(struct ieee80211_local *local,
421 struct ieee80211_sub_if_data *sdata)
422 {
423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
424 struct ieee80211_pspoll *pspoll;
425 struct sk_buff *skb;
426 u16 fc;
427
428 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
429 if (!skb) {
430 printk(KERN_DEBUG "%s: failed to allocate buffer for "
431 "pspoll frame\n", sdata->dev->name);
432 return;
433 }
434 skb_reserve(skb, local->hw.extra_tx_headroom);
435
436 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
437 memset(pspoll, 0, sizeof(*pspoll));
438 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
439 pspoll->frame_control = cpu_to_le16(fc);
440 pspoll->aid = cpu_to_le16(ifmgd->aid);
441
442 /* aid in PS-Poll has its two MSBs each set to 1 */
443 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
444
445 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
446 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
447
448 ieee80211_tx_skb(sdata, skb, 0);
449 }
450
451 void ieee80211_send_nullfunc(struct ieee80211_local *local,
452 struct ieee80211_sub_if_data *sdata,
453 int powersave)
454 {
455 struct sk_buff *skb;
456 struct ieee80211_hdr *nullfunc;
457 __le16 fc;
458
459 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
460 return;
461
462 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
463 if (!skb) {
464 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
465 "frame\n", sdata->dev->name);
466 return;
467 }
468 skb_reserve(skb, local->hw.extra_tx_headroom);
469
470 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
471 memset(nullfunc, 0, 24);
472 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
473 IEEE80211_FCTL_TODS);
474 if (powersave)
475 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
476 nullfunc->frame_control = fc;
477 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
478 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
479 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
480
481 ieee80211_tx_skb(sdata, skb, 0);
482 }
483
484 /* powersave */
485 static void ieee80211_enable_ps(struct ieee80211_local *local,
486 struct ieee80211_sub_if_data *sdata)
487 {
488 struct ieee80211_conf *conf = &local->hw.conf;
489
490 /*
491 * If we are scanning right now then the parameters will
492 * take effect when scan finishes.
493 */
494 if (local->hw_scanning || local->sw_scanning)
495 return;
496
497 if (conf->dynamic_ps_timeout > 0 &&
498 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
499 mod_timer(&local->dynamic_ps_timer, jiffies +
500 msecs_to_jiffies(conf->dynamic_ps_timeout));
501 } else {
502 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
503 ieee80211_send_nullfunc(local, sdata, 1);
504 conf->flags |= IEEE80211_CONF_PS;
505 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
506 }
507 }
508
509 static void ieee80211_change_ps(struct ieee80211_local *local)
510 {
511 struct ieee80211_conf *conf = &local->hw.conf;
512
513 if (local->ps_sdata) {
514 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
515 return;
516
517 ieee80211_enable_ps(local, local->ps_sdata);
518 } else if (conf->flags & IEEE80211_CONF_PS) {
519 conf->flags &= ~IEEE80211_CONF_PS;
520 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
521 del_timer_sync(&local->dynamic_ps_timer);
522 cancel_work_sync(&local->dynamic_ps_enable_work);
523 }
524 }
525
526 /* need to hold RTNL or interface lock */
527 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
528 {
529 struct ieee80211_sub_if_data *sdata, *found = NULL;
530 int count = 0;
531
532 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
533 local->ps_sdata = NULL;
534 return;
535 }
536
537 list_for_each_entry(sdata, &local->interfaces, list) {
538 if (!netif_running(sdata->dev))
539 continue;
540 if (sdata->vif.type != NL80211_IFTYPE_STATION)
541 continue;
542 found = sdata;
543 count++;
544 }
545
546 if (count == 1 && found->u.mgd.powersave) {
547 s32 beaconint_us;
548
549 if (latency < 0)
550 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
551
552 beaconint_us = ieee80211_tu_to_usec(
553 found->vif.bss_conf.beacon_int);
554
555 if (beaconint_us > latency) {
556 local->ps_sdata = NULL;
557 } else {
558 u8 dtimper = found->vif.bss_conf.dtim_period;
559 int maxslp = 1;
560
561 if (dtimper > 1)
562 maxslp = min_t(int, dtimper,
563 latency / beaconint_us);
564
565 local->hw.conf.max_sleep_period = maxslp;
566 local->ps_sdata = found;
567 }
568 } else {
569 local->ps_sdata = NULL;
570 }
571
572 ieee80211_change_ps(local);
573 }
574
575 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
576 {
577 struct ieee80211_local *local =
578 container_of(work, struct ieee80211_local,
579 dynamic_ps_disable_work);
580
581 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
582 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
583 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
584 }
585
586 ieee80211_wake_queues_by_reason(&local->hw,
587 IEEE80211_QUEUE_STOP_REASON_PS);
588 }
589
590 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
591 {
592 struct ieee80211_local *local =
593 container_of(work, struct ieee80211_local,
594 dynamic_ps_enable_work);
595 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
596
597 /* can only happen when PS was just disabled anyway */
598 if (!sdata)
599 return;
600
601 if (local->hw.conf.flags & IEEE80211_CONF_PS)
602 return;
603
604 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
605 ieee80211_send_nullfunc(local, sdata, 1);
606
607 local->hw.conf.flags |= IEEE80211_CONF_PS;
608 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
609 }
610
611 void ieee80211_dynamic_ps_timer(unsigned long data)
612 {
613 struct ieee80211_local *local = (void *) data;
614
615 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
616 }
617
618 /* MLME */
619 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
620 struct ieee80211_if_managed *ifmgd,
621 u8 *wmm_param, size_t wmm_param_len)
622 {
623 struct ieee80211_tx_queue_params params;
624 size_t left;
625 int count;
626 u8 *pos;
627
628 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
629 return;
630
631 if (!wmm_param)
632 return;
633
634 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
635 return;
636 count = wmm_param[6] & 0x0f;
637 if (count == ifmgd->wmm_last_param_set)
638 return;
639 ifmgd->wmm_last_param_set = count;
640
641 pos = wmm_param + 8;
642 left = wmm_param_len - 8;
643
644 memset(&params, 0, sizeof(params));
645
646 local->wmm_acm = 0;
647 for (; left >= 4; left -= 4, pos += 4) {
648 int aci = (pos[0] >> 5) & 0x03;
649 int acm = (pos[0] >> 4) & 0x01;
650 int queue;
651
652 switch (aci) {
653 case 1: /* AC_BK */
654 queue = 3;
655 if (acm)
656 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
657 break;
658 case 2: /* AC_VI */
659 queue = 1;
660 if (acm)
661 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
662 break;
663 case 3: /* AC_VO */
664 queue = 0;
665 if (acm)
666 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
667 break;
668 case 0: /* AC_BE */
669 default:
670 queue = 2;
671 if (acm)
672 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
673 break;
674 }
675
676 params.aifs = pos[0] & 0x0f;
677 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
678 params.cw_min = ecw2cw(pos[1] & 0x0f);
679 params.txop = get_unaligned_le16(pos + 2);
680 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
681 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
682 "cWmin=%d cWmax=%d txop=%d\n",
683 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
684 params.cw_max, params.txop);
685 #endif
686 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
687 printk(KERN_DEBUG "%s: failed to set TX queue "
688 "parameters for queue %d\n", local->mdev->name,
689 queue);
690 }
691 }
692
693 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
694 u16 capab, bool erp_valid, u8 erp)
695 {
696 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
697 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
698 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
699 #endif
700 u32 changed = 0;
701 bool use_protection;
702 bool use_short_preamble;
703 bool use_short_slot;
704
705 if (erp_valid) {
706 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
707 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
708 } else {
709 use_protection = false;
710 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
711 }
712
713 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
714
715 if (use_protection != bss_conf->use_cts_prot) {
716 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
717 if (net_ratelimit()) {
718 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
719 sdata->dev->name,
720 use_protection ? "enabled" : "disabled",
721 ifmgd->bssid);
722 }
723 #endif
724 bss_conf->use_cts_prot = use_protection;
725 changed |= BSS_CHANGED_ERP_CTS_PROT;
726 }
727
728 if (use_short_preamble != bss_conf->use_short_preamble) {
729 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
730 if (net_ratelimit()) {
731 printk(KERN_DEBUG "%s: switched to %s barker preamble"
732 " (BSSID=%pM)\n",
733 sdata->dev->name,
734 use_short_preamble ? "short" : "long",
735 ifmgd->bssid);
736 }
737 #endif
738 bss_conf->use_short_preamble = use_short_preamble;
739 changed |= BSS_CHANGED_ERP_PREAMBLE;
740 }
741
742 if (use_short_slot != bss_conf->use_short_slot) {
743 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
744 if (net_ratelimit()) {
745 printk(KERN_DEBUG "%s: switched to %s slot time"
746 " (BSSID=%pM)\n",
747 sdata->dev->name,
748 use_short_slot ? "short" : "long",
749 ifmgd->bssid);
750 }
751 #endif
752 bss_conf->use_short_slot = use_short_slot;
753 changed |= BSS_CHANGED_ERP_SLOT;
754 }
755
756 return changed;
757 }
758
759 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
760 {
761 union iwreq_data wrqu;
762
763 memset(&wrqu, 0, sizeof(wrqu));
764 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
765 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
766 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
767 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
768 }
769
770 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
771 {
772 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
773 char *buf;
774 size_t len;
775 int i;
776 union iwreq_data wrqu;
777
778 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
779 return;
780
781 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
782 ifmgd->assocresp_ies_len), GFP_KERNEL);
783 if (!buf)
784 return;
785
786 len = sprintf(buf, "ASSOCINFO(");
787 if (ifmgd->assocreq_ies) {
788 len += sprintf(buf + len, "ReqIEs=");
789 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
790 len += sprintf(buf + len, "%02x",
791 ifmgd->assocreq_ies[i]);
792 }
793 }
794 if (ifmgd->assocresp_ies) {
795 if (ifmgd->assocreq_ies)
796 len += sprintf(buf + len, " ");
797 len += sprintf(buf + len, "RespIEs=");
798 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
799 len += sprintf(buf + len, "%02x",
800 ifmgd->assocresp_ies[i]);
801 }
802 }
803 len += sprintf(buf + len, ")");
804
805 if (len > IW_CUSTOM_MAX) {
806 len = sprintf(buf, "ASSOCRESPIE=");
807 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
808 len += sprintf(buf + len, "%02x",
809 ifmgd->assocresp_ies[i]);
810 }
811 }
812
813 if (len <= IW_CUSTOM_MAX) {
814 memset(&wrqu, 0, sizeof(wrqu));
815 wrqu.data.length = len;
816 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
817 }
818
819 kfree(buf);
820 }
821
822
823 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
824 u32 bss_info_changed)
825 {
826 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
827 struct ieee80211_local *local = sdata->local;
828 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
829
830 struct ieee80211_bss *bss;
831
832 bss_info_changed |= BSS_CHANGED_ASSOC;
833 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
834
835 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
836 conf->channel->center_freq,
837 ifmgd->ssid, ifmgd->ssid_len);
838 if (bss) {
839 /* set timing information */
840 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
841 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
842 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
843
844 bss_info_changed |= BSS_CHANGED_BEACON_INT;
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_recalc_idle(local);
893 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
894
895 /*
896 * Most likely AP is not in the range so remove the
897 * bss information associated to the AP
898 */
899 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
900 sdata->local->hw.conf.channel->center_freq,
901 ifmgd->ssid, ifmgd->ssid_len);
902
903 /*
904 * We might have a pending scan which had no chance to run yet
905 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
906 * Hence, queue the STAs work again
907 */
908 queue_work(local->hw.workqueue, &ifmgd->work);
909 return;
910 }
911
912 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
913 sdata->dev->name, ifmgd->bssid,
914 ifmgd->direct_probe_tries);
915
916 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
917
918 /* Direct probe is sent to broadcast address as some APs
919 * will not answer to direct packet in unassociated state.
920 */
921 ieee80211_send_probe_req(sdata, NULL,
922 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
923
924 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
925 }
926
927
928 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
929 {
930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
931 struct ieee80211_local *local = sdata->local;
932 u8 *ies;
933 size_t ies_len;
934
935 ifmgd->auth_tries++;
936 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
937 printk(KERN_DEBUG "%s: authentication with AP %pM"
938 " timed out\n",
939 sdata->dev->name, ifmgd->bssid);
940 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
941 ieee80211_recalc_idle(local);
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 ieee80211_set_wmm_default(sdata);
1046
1047 ieee80211_recalc_idle(local);
1048
1049 /* channel(_type) changes are handled by ieee80211_hw_config */
1050 local->oper_channel_type = NL80211_CHAN_NO_HT;
1051
1052 /* on the next assoc, re-program HT parameters */
1053 sdata->ht_opmode_valid = false;
1054
1055 local->power_constr_level = 0;
1056
1057 del_timer_sync(&local->dynamic_ps_timer);
1058 cancel_work_sync(&local->dynamic_ps_enable_work);
1059
1060 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1061 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1062 config_changed |= IEEE80211_CONF_CHANGE_PS;
1063 }
1064
1065 ieee80211_hw_config(local, config_changed);
1066 ieee80211_bss_info_change_notify(sdata, changed);
1067
1068 rcu_read_lock();
1069
1070 sta = sta_info_get(local, ifmgd->bssid);
1071 if (!sta) {
1072 rcu_read_unlock();
1073 return;
1074 }
1075
1076 sta_info_unlink(&sta);
1077
1078 rcu_read_unlock();
1079
1080 sta_info_destroy(sta);
1081 }
1082
1083 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1084 {
1085 if (!sdata || !sdata->default_key ||
1086 sdata->default_key->conf.alg != ALG_WEP)
1087 return 0;
1088 return 1;
1089 }
1090
1091 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
1092 {
1093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1094 struct ieee80211_local *local = sdata->local;
1095 struct ieee80211_bss *bss;
1096 int bss_privacy;
1097 int wep_privacy;
1098 int privacy_invoked;
1099
1100 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
1101 return 0;
1102
1103 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1104 local->hw.conf.channel->center_freq,
1105 ifmgd->ssid, ifmgd->ssid_len);
1106 if (!bss)
1107 return 0;
1108
1109 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
1110 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
1111 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
1112
1113 ieee80211_rx_bss_put(local, bss);
1114
1115 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1116 return 0;
1117
1118 return 1;
1119 }
1120
1121 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
1122 {
1123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1124 struct ieee80211_local *local = sdata->local;
1125
1126 ifmgd->assoc_tries++;
1127 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1128 printk(KERN_DEBUG "%s: association with AP %pM"
1129 " timed out\n",
1130 sdata->dev->name, ifmgd->bssid);
1131 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1132 ieee80211_recalc_idle(local);
1133 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
1134 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
1135 sdata->local->hw.conf.channel->center_freq,
1136 ifmgd->ssid, ifmgd->ssid_len);
1137 /*
1138 * We might have a pending scan which had no chance to run yet
1139 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1140 * Hence, queue the STAs work again
1141 */
1142 queue_work(local->hw.workqueue, &ifmgd->work);
1143 return;
1144 }
1145
1146 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1147 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1148 sdata->dev->name, ifmgd->bssid);
1149 if (ieee80211_privacy_mismatch(sdata)) {
1150 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1151 "mixed-cell disabled - abort association\n", sdata->dev->name);
1152 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1153 ieee80211_recalc_idle(local);
1154 return;
1155 }
1156
1157 ieee80211_send_assoc(sdata);
1158
1159 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1160 }
1161
1162 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1163 struct ieee80211_hdr *hdr)
1164 {
1165 /*
1166 * We can postpone the mgd.timer whenever receiving unicast frames
1167 * from AP because we know that the connection is working both ways
1168 * at that time. But multicast frames (and hence also beacons) must
1169 * be ignored here, because we need to trigger the timer during
1170 * data idle periods for sending the periodical probe request to
1171 * the AP.
1172 */
1173 if (!is_multicast_ether_addr(hdr->addr1))
1174 mod_timer(&sdata->u.mgd.timer,
1175 jiffies + IEEE80211_MONITORING_INTERVAL);
1176 }
1177
1178 void ieee80211_beacon_loss_work(struct work_struct *work)
1179 {
1180 struct ieee80211_sub_if_data *sdata =
1181 container_of(work, struct ieee80211_sub_if_data,
1182 u.mgd.beacon_loss_work);
1183 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1184
1185 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1186 if (net_ratelimit()) {
1187 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1188 "- sending probe request\n", sdata->dev->name,
1189 sdata->u.mgd.bssid);
1190 }
1191 #endif
1192
1193 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1194 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1195 ifmgd->ssid_len, NULL, 0);
1196
1197 mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL);
1198 }
1199
1200 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1201 {
1202 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1203
1204 queue_work(sdata->local->hw.workqueue,
1205 &sdata->u.mgd.beacon_loss_work);
1206 }
1207 EXPORT_SYMBOL(ieee80211_beacon_loss);
1208
1209 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
1210 {
1211 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1212 struct ieee80211_local *local = sdata->local;
1213 struct sta_info *sta;
1214 bool disassoc = false;
1215
1216 /* TODO: start monitoring current AP signal quality and number of
1217 * missed beacons. Scan other channels every now and then and search
1218 * for better APs. */
1219 /* TODO: remove expired BSSes */
1220
1221 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
1222
1223 rcu_read_lock();
1224
1225 sta = sta_info_get(local, ifmgd->bssid);
1226 if (!sta) {
1227 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1228 sdata->dev->name, ifmgd->bssid);
1229 disassoc = true;
1230 goto unlock;
1231 }
1232
1233 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
1234 time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1235 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1236 "- disassociating\n",
1237 sdata->dev->name, ifmgd->bssid);
1238 disassoc = true;
1239 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1240 goto unlock;
1241 }
1242
1243 /*
1244 * Beacon filtering is only enabled with power save and then the
1245 * stack should not check for beacon loss.
1246 */
1247 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1248 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1249 time_after(jiffies,
1250 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
1251 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1252 if (net_ratelimit()) {
1253 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1254 "- sending probe request\n",
1255 sdata->dev->name, ifmgd->bssid);
1256 }
1257 #endif
1258 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1259 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1260 ifmgd->ssid_len, NULL, 0);
1261 goto unlock;
1262
1263 }
1264
1265 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1266 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1267 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1268 ifmgd->ssid_len, NULL, 0);
1269 }
1270
1271 unlock:
1272 rcu_read_unlock();
1273
1274 if (disassoc)
1275 ieee80211_set_disassoc(sdata, true, true,
1276 WLAN_REASON_PREV_AUTH_NOT_VALID);
1277 else
1278 mod_timer(&ifmgd->timer, jiffies +
1279 IEEE80211_MONITORING_INTERVAL);
1280 }
1281
1282
1283 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
1284 {
1285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1286
1287 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1288 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
1289 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1290 /* Wait for SME to request association */
1291 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1292 ieee80211_recalc_idle(sdata->local);
1293 } else
1294 ieee80211_associate(sdata);
1295 }
1296
1297
1298 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1299 struct ieee80211_mgmt *mgmt,
1300 size_t len)
1301 {
1302 u8 *pos;
1303 struct ieee802_11_elems elems;
1304
1305 pos = mgmt->u.auth.variable;
1306 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1307 if (!elems.challenge)
1308 return;
1309 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1310 elems.challenge - 2, elems.challenge_len + 2,
1311 sdata->u.mgd.bssid, 1);
1312 sdata->u.mgd.auth_transaction = 4;
1313 }
1314
1315 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1316 struct ieee80211_mgmt *mgmt,
1317 size_t len)
1318 {
1319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1320 u16 auth_alg, auth_transaction, status_code;
1321
1322 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
1323 return;
1324
1325 if (len < 24 + 6)
1326 return;
1327
1328 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1329 return;
1330
1331 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1332 return;
1333
1334 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1335 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1336 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1337
1338 if (auth_alg != ifmgd->auth_alg ||
1339 auth_transaction != ifmgd->auth_transaction)
1340 return;
1341
1342 if (status_code != WLAN_STATUS_SUCCESS) {
1343 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1344 u8 algs[3];
1345 const int num_algs = ARRAY_SIZE(algs);
1346 int i, pos;
1347 algs[0] = algs[1] = algs[2] = 0xff;
1348 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1349 algs[0] = WLAN_AUTH_OPEN;
1350 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1351 algs[1] = WLAN_AUTH_SHARED_KEY;
1352 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1353 algs[2] = WLAN_AUTH_LEAP;
1354 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
1355 pos = 0;
1356 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
1357 pos = 1;
1358 else
1359 pos = 2;
1360 for (i = 0; i < num_algs; i++) {
1361 pos++;
1362 if (pos >= num_algs)
1363 pos = 0;
1364 if (algs[pos] == ifmgd->auth_alg ||
1365 algs[pos] == 0xff)
1366 continue;
1367 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1368 !ieee80211_sta_wep_configured(sdata))
1369 continue;
1370 ifmgd->auth_alg = algs[pos];
1371 break;
1372 }
1373 }
1374 return;
1375 }
1376
1377 switch (ifmgd->auth_alg) {
1378 case WLAN_AUTH_OPEN:
1379 case WLAN_AUTH_LEAP:
1380 case WLAN_AUTH_FT:
1381 ieee80211_auth_completed(sdata);
1382 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1383 break;
1384 case WLAN_AUTH_SHARED_KEY:
1385 if (ifmgd->auth_transaction == 4) {
1386 ieee80211_auth_completed(sdata);
1387 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1388 } else
1389 ieee80211_auth_challenge(sdata, mgmt, len);
1390 break;
1391 }
1392 }
1393
1394
1395 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1396 struct ieee80211_mgmt *mgmt,
1397 size_t len)
1398 {
1399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1400 u16 reason_code;
1401
1402 if (len < 24 + 2)
1403 return;
1404
1405 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1406 return;
1407
1408 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1409
1410 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
1411 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1412 sdata->dev->name, reason_code);
1413
1414 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1415 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1416 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1417 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
1418 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1419 mod_timer(&ifmgd->timer, jiffies +
1420 IEEE80211_RETRY_AUTH_INTERVAL);
1421 }
1422
1423 ieee80211_set_disassoc(sdata, true, false, 0);
1424 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
1425 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
1426 }
1427
1428
1429 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1430 struct ieee80211_mgmt *mgmt,
1431 size_t len)
1432 {
1433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1434 u16 reason_code;
1435
1436 if (len < 24 + 2)
1437 return;
1438
1439 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
1440 return;
1441
1442 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1443
1444 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
1445 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1446 sdata->dev->name, reason_code);
1447
1448 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1449 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1450 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1451 mod_timer(&ifmgd->timer, jiffies +
1452 IEEE80211_RETRY_AUTH_INTERVAL);
1453 }
1454
1455 ieee80211_set_disassoc(sdata, false, false, reason_code);
1456 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
1457 }
1458
1459
1460 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1461 struct ieee80211_mgmt *mgmt,
1462 size_t len,
1463 int reassoc)
1464 {
1465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1466 struct ieee80211_local *local = sdata->local;
1467 struct ieee80211_supported_band *sband;
1468 struct sta_info *sta;
1469 u32 rates, basic_rates;
1470 u16 capab_info, status_code, aid;
1471 struct ieee802_11_elems elems;
1472 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1473 u8 *pos;
1474 u32 changed = 0;
1475 int i, j;
1476 bool have_higher_than_11mbit = false, newsta = false;
1477 u16 ap_ht_cap_flags;
1478
1479 /* AssocResp and ReassocResp have identical structure, so process both
1480 * of them in this function. */
1481
1482 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
1483 return;
1484
1485 if (len < 24 + 6)
1486 return;
1487
1488 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
1489 return;
1490
1491 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1492 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1493 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1494
1495 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
1496 "status=%d aid=%d)\n",
1497 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
1498 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1499
1500 pos = mgmt->u.assoc_resp.variable;
1501 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1502
1503 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1504 elems.timeout_int && elems.timeout_int_len == 5 &&
1505 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1506 u32 tu, ms;
1507 tu = get_unaligned_le32(elems.timeout_int + 1);
1508 ms = tu * 1024 / 1000;
1509 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1510 "comeback duration %u TU (%u ms)\n",
1511 sdata->dev->name, tu, ms);
1512 if (ms > IEEE80211_ASSOC_TIMEOUT)
1513 mod_timer(&ifmgd->timer,
1514 jiffies + msecs_to_jiffies(ms));
1515 return;
1516 }
1517
1518 if (status_code != WLAN_STATUS_SUCCESS) {
1519 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1520 sdata->dev->name, status_code);
1521 /* if this was a reassociation, ensure we try a "full"
1522 * association next time. This works around some broken APs
1523 * which do not correctly reject reassociation requests. */
1524 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1525 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1526 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1527 /* Wait for SME to decide what to do next */
1528 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1529 ieee80211_recalc_idle(local);
1530 }
1531 return;
1532 }
1533
1534 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1535 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1536 "set\n", sdata->dev->name, aid);
1537 aid &= ~(BIT(15) | BIT(14));
1538
1539 if (!elems.supp_rates) {
1540 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1541 sdata->dev->name);
1542 return;
1543 }
1544
1545 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1546 ifmgd->aid = aid;
1547 ifmgd->ap_capab = capab_info;
1548
1549 kfree(ifmgd->assocresp_ies);
1550 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1551 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1552 if (ifmgd->assocresp_ies)
1553 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
1554
1555 rcu_read_lock();
1556
1557 /* Add STA entry for the AP */
1558 sta = sta_info_get(local, ifmgd->bssid);
1559 if (!sta) {
1560 newsta = true;
1561
1562 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
1563 if (!sta) {
1564 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1565 " the AP\n", sdata->dev->name);
1566 rcu_read_unlock();
1567 return;
1568 }
1569
1570 /* update new sta with its last rx activity */
1571 sta->last_rx = jiffies;
1572 }
1573
1574 /*
1575 * FIXME: Do we really need to update the sta_info's information here?
1576 * We already know about the AP (we found it in our list) so it
1577 * should already be filled with the right info, no?
1578 * As is stands, all this is racy because typically we assume
1579 * the information that is filled in here (except flags) doesn't
1580 * change while a STA structure is alive. As such, it should move
1581 * to between the sta_info_alloc() and sta_info_insert() above.
1582 */
1583
1584 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1585 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1586 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1587
1588 rates = 0;
1589 basic_rates = 0;
1590 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1591
1592 for (i = 0; i < elems.supp_rates_len; i++) {
1593 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1594 bool is_basic = !!(elems.supp_rates[i] & 0x80);
1595
1596 if (rate > 110)
1597 have_higher_than_11mbit = true;
1598
1599 for (j = 0; j < sband->n_bitrates; j++) {
1600 if (sband->bitrates[j].bitrate == rate) {
1601 rates |= BIT(j);
1602 if (is_basic)
1603 basic_rates |= BIT(j);
1604 break;
1605 }
1606 }
1607 }
1608
1609 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1610 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1611 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
1612
1613 if (rate > 110)
1614 have_higher_than_11mbit = true;
1615
1616 for (j = 0; j < sband->n_bitrates; j++) {
1617 if (sband->bitrates[j].bitrate == rate) {
1618 rates |= BIT(j);
1619 if (is_basic)
1620 basic_rates |= BIT(j);
1621 break;
1622 }
1623 }
1624 }
1625
1626 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
1627 sdata->vif.bss_conf.basic_rates = basic_rates;
1628
1629 /* cf. IEEE 802.11 9.2.12 */
1630 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1631 have_higher_than_11mbit)
1632 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1633 else
1634 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1635
1636 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1637 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1638 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1639 elems.ht_cap_elem, &sta->sta.ht_cap);
1640
1641 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1642
1643 rate_control_rate_init(sta);
1644
1645 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
1646 set_sta_flags(sta, WLAN_STA_MFP);
1647
1648 if (elems.wmm_param)
1649 set_sta_flags(sta, WLAN_STA_WME);
1650
1651 if (newsta) {
1652 int err = sta_info_insert(sta);
1653 if (err) {
1654 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1655 " the AP (error %d)\n", sdata->dev->name, err);
1656 rcu_read_unlock();
1657 return;
1658 }
1659 }
1660
1661 rcu_read_unlock();
1662
1663 if (elems.wmm_param)
1664 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1665 elems.wmm_param_len);
1666 else
1667 ieee80211_set_wmm_default(sdata);
1668
1669 if (elems.ht_info_elem && elems.wmm_param &&
1670 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1671 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
1672 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1673 ap_ht_cap_flags);
1674
1675 /* set AID and assoc capability,
1676 * ieee80211_set_associated() will tell the driver */
1677 bss_conf->aid = aid;
1678 bss_conf->assoc_capability = capab_info;
1679 ieee80211_set_associated(sdata, changed);
1680
1681 /*
1682 * initialise the time of last beacon to be the association time,
1683 * otherwise beacon loss check will trigger immediately
1684 */
1685 ifmgd->last_beacon = jiffies;
1686
1687 ieee80211_associated(sdata);
1688 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1689 }
1690
1691
1692 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1693 struct ieee80211_mgmt *mgmt,
1694 size_t len,
1695 struct ieee80211_rx_status *rx_status,
1696 struct ieee802_11_elems *elems,
1697 bool beacon)
1698 {
1699 struct ieee80211_local *local = sdata->local;
1700 int freq;
1701 struct ieee80211_bss *bss;
1702 struct ieee80211_channel *channel;
1703
1704 if (elems->ds_params && elems->ds_params_len == 1)
1705 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1706 else
1707 freq = rx_status->freq;
1708
1709 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1710
1711 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1712 return;
1713
1714 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1715 channel, beacon);
1716 if (!bss)
1717 return;
1718
1719 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1720 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
1721 struct ieee80211_channel_sw_ie *sw_elem =
1722 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1723 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1724 }
1725
1726 ieee80211_rx_bss_put(local, bss);
1727 }
1728
1729
1730 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
1731 struct ieee80211_mgmt *mgmt,
1732 size_t len,
1733 struct ieee80211_rx_status *rx_status)
1734 {
1735 struct ieee80211_if_managed *ifmgd;
1736 size_t baselen;
1737 struct ieee802_11_elems elems;
1738
1739 ifmgd = &sdata->u.mgd;
1740
1741 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1742 return; /* ignore ProbeResp to foreign address */
1743
1744 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1745 if (baselen > len)
1746 return;
1747
1748 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1749 &elems);
1750
1751 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
1752
1753 /* direct probe may be part of the association flow */
1754 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
1755 printk(KERN_DEBUG "%s direct probe responded\n",
1756 sdata->dev->name);
1757 ieee80211_authenticate(sdata);
1758 }
1759
1760 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1761 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1762 }
1763
1764 /*
1765 * This is the canonical list of information elements we care about,
1766 * the filter code also gives us all changes to the Microsoft OUI
1767 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1768 *
1769 * We implement beacon filtering in software since that means we can
1770 * avoid processing the frame here and in cfg80211, and userspace
1771 * will not be able to tell whether the hardware supports it or not.
1772 *
1773 * XXX: This list needs to be dynamic -- userspace needs to be able to
1774 * add items it requires. It also needs to be able to tell us to
1775 * look out for other vendor IEs.
1776 */
1777 static const u64 care_about_ies =
1778 (1ULL << WLAN_EID_COUNTRY) |
1779 (1ULL << WLAN_EID_ERP_INFO) |
1780 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1781 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1782 (1ULL << WLAN_EID_HT_CAPABILITY) |
1783 (1ULL << WLAN_EID_HT_INFORMATION);
1784
1785 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
1786 struct ieee80211_mgmt *mgmt,
1787 size_t len,
1788 struct ieee80211_rx_status *rx_status)
1789 {
1790 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1791 size_t baselen;
1792 struct ieee802_11_elems elems;
1793 struct ieee80211_local *local = sdata->local;
1794 u32 changed = 0;
1795 bool erp_valid, directed_tim = false;
1796 u8 erp_value = 0;
1797 u32 ncrc;
1798
1799 /* Process beacon from the current BSS */
1800 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1801 if (baselen > len)
1802 return;
1803
1804 if (rx_status->freq != local->hw.conf.channel->center_freq)
1805 return;
1806
1807 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1808 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
1809 return;
1810
1811 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1812 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1813 len - baselen, &elems,
1814 care_about_ies, ncrc);
1815
1816 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1817 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1818 ifmgd->aid);
1819
1820 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1821
1822 if (ncrc == ifmgd->beacon_crc)
1823 return;
1824 ifmgd->beacon_crc = ncrc;
1825
1826 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
1827
1828 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1829 elems.wmm_param_len);
1830
1831 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1832 if (directed_tim) {
1833 if (local->hw.conf.dynamic_ps_timeout > 0) {
1834 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1835 ieee80211_hw_config(local,
1836 IEEE80211_CONF_CHANGE_PS);
1837 ieee80211_send_nullfunc(local, sdata, 0);
1838 } else {
1839 local->pspolling = true;
1840
1841 /*
1842 * Here is assumed that the driver will be
1843 * able to send ps-poll frame and receive a
1844 * response even though power save mode is
1845 * enabled, but some drivers might require
1846 * to disable power save here. This needs
1847 * to be investigated.
1848 */
1849 ieee80211_send_pspoll(local, sdata);
1850 }
1851 }
1852 }
1853
1854 if (elems.erp_info && elems.erp_info_len >= 1) {
1855 erp_valid = true;
1856 erp_value = elems.erp_info[0];
1857 } else {
1858 erp_valid = false;
1859 }
1860 changed |= ieee80211_handle_bss_capability(sdata,
1861 le16_to_cpu(mgmt->u.beacon.capab_info),
1862 erp_valid, erp_value);
1863
1864
1865 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1866 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
1867 struct sta_info *sta;
1868 struct ieee80211_supported_band *sband;
1869 u16 ap_ht_cap_flags;
1870
1871 rcu_read_lock();
1872
1873 sta = sta_info_get(local, ifmgd->bssid);
1874 if (!sta) {
1875 rcu_read_unlock();
1876 return;
1877 }
1878
1879 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1880
1881 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1882 elems.ht_cap_elem, &sta->sta.ht_cap);
1883
1884 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1885
1886 rcu_read_unlock();
1887
1888 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1889 ap_ht_cap_flags);
1890 }
1891
1892 if (elems.country_elem) {
1893 /* Note we are only reviewing this on beacons
1894 * for the BSSID we are associated to */
1895 regulatory_hint_11d(local->hw.wiphy,
1896 elems.country_elem, elems.country_elem_len);
1897
1898 /* TODO: IBSS also needs this */
1899 if (elems.pwr_constr_elem)
1900 ieee80211_handle_pwr_constr(sdata,
1901 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1902 elems.pwr_constr_elem,
1903 elems.pwr_constr_elem_len);
1904 }
1905
1906 ieee80211_bss_info_change_notify(sdata, changed);
1907 }
1908
1909 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1910 struct sk_buff *skb,
1911 struct ieee80211_rx_status *rx_status)
1912 {
1913 struct ieee80211_local *local = sdata->local;
1914 struct ieee80211_mgmt *mgmt;
1915 u16 fc;
1916
1917 if (skb->len < 24)
1918 return RX_DROP_MONITOR;
1919
1920 mgmt = (struct ieee80211_mgmt *) skb->data;
1921 fc = le16_to_cpu(mgmt->frame_control);
1922
1923 switch (fc & IEEE80211_FCTL_STYPE) {
1924 case IEEE80211_STYPE_PROBE_REQ:
1925 case IEEE80211_STYPE_PROBE_RESP:
1926 case IEEE80211_STYPE_BEACON:
1927 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1928 case IEEE80211_STYPE_AUTH:
1929 case IEEE80211_STYPE_ASSOC_RESP:
1930 case IEEE80211_STYPE_REASSOC_RESP:
1931 case IEEE80211_STYPE_DEAUTH:
1932 case IEEE80211_STYPE_DISASSOC:
1933 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1934 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1935 return RX_QUEUED;
1936 }
1937
1938 return RX_DROP_MONITOR;
1939 }
1940
1941 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1942 struct sk_buff *skb)
1943 {
1944 struct ieee80211_rx_status *rx_status;
1945 struct ieee80211_mgmt *mgmt;
1946 u16 fc;
1947
1948 rx_status = (struct ieee80211_rx_status *) skb->cb;
1949 mgmt = (struct ieee80211_mgmt *) skb->data;
1950 fc = le16_to_cpu(mgmt->frame_control);
1951
1952 switch (fc & IEEE80211_FCTL_STYPE) {
1953 case IEEE80211_STYPE_PROBE_RESP:
1954 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1955 rx_status);
1956 break;
1957 case IEEE80211_STYPE_BEACON:
1958 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1959 rx_status);
1960 break;
1961 case IEEE80211_STYPE_AUTH:
1962 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1963 break;
1964 case IEEE80211_STYPE_ASSOC_RESP:
1965 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1966 break;
1967 case IEEE80211_STYPE_REASSOC_RESP:
1968 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1969 break;
1970 case IEEE80211_STYPE_DEAUTH:
1971 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1972 break;
1973 case IEEE80211_STYPE_DISASSOC:
1974 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1975 break;
1976 }
1977
1978 kfree_skb(skb);
1979 }
1980
1981 static void ieee80211_sta_timer(unsigned long data)
1982 {
1983 struct ieee80211_sub_if_data *sdata =
1984 (struct ieee80211_sub_if_data *) data;
1985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1986 struct ieee80211_local *local = sdata->local;
1987
1988 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1989 queue_work(local->hw.workqueue, &ifmgd->work);
1990 }
1991
1992 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
1993 {
1994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1995 struct ieee80211_local *local = sdata->local;
1996
1997 /* Reset own TSF to allow time synchronization work. */
1998 drv_reset_tsf(local);
1999
2000 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
2001
2002
2003 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2004 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2005 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2006 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2007 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2008 ifmgd->auth_alg = WLAN_AUTH_LEAP;
2009 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2010 ifmgd->auth_alg = WLAN_AUTH_FT;
2011 else
2012 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2013 ifmgd->auth_transaction = -1;
2014 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2015 ifmgd->assoc_scan_tries = 0;
2016 ifmgd->direct_probe_tries = 0;
2017 ifmgd->auth_tries = 0;
2018 ifmgd->assoc_tries = 0;
2019 netif_tx_stop_all_queues(sdata->dev);
2020 netif_carrier_off(sdata->dev);
2021 }
2022
2023 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
2024 {
2025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2026 struct ieee80211_local *local = sdata->local;
2027 struct ieee80211_bss *bss;
2028 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2029 u8 ssid_len = ifmgd->ssid_len;
2030 u16 capa_mask = WLAN_CAPABILITY_ESS;
2031 u16 capa_val = WLAN_CAPABILITY_ESS;
2032 struct ieee80211_channel *chan = local->oper_channel;
2033
2034 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2035 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2036 IEEE80211_STA_AUTO_BSSID_SEL |
2037 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2038 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2039 if (sdata->default_key)
2040 capa_val |= WLAN_CAPABILITY_PRIVACY;
2041 }
2042
2043 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2044 chan = NULL;
2045
2046 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2047 bssid = NULL;
2048
2049 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2050 ssid = NULL;
2051 ssid_len = 0;
2052 }
2053
2054 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2055 bssid, ssid, ssid_len,
2056 capa_mask, capa_val);
2057
2058 if (bss) {
2059 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
2060 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
2061 ieee80211_sta_set_ssid(sdata, bss->ssid,
2062 bss->ssid_len);
2063 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2064 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2065 bss->supp_rates);
2066 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2067 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
2068 else
2069 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
2070
2071 /* Send out direct probe if no probe resp was received or
2072 * the one we have is outdated
2073 */
2074 if (!bss->last_probe_resp ||
2075 time_after(jiffies, bss->last_probe_resp
2076 + IEEE80211_SCAN_RESULT_EXPIRE))
2077 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2078 else
2079 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2080
2081 ieee80211_rx_bss_put(local, bss);
2082 ieee80211_sta_reset_auth(sdata);
2083 return 0;
2084 } else {
2085 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2086
2087 ifmgd->assoc_scan_tries++;
2088
2089 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2090 ssid_len);
2091
2092 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2093 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2094 } else {
2095 ifmgd->assoc_scan_tries = 0;
2096 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
2097 ieee80211_recalc_idle(local);
2098 }
2099 }
2100 return -1;
2101 }
2102
2103
2104 static void ieee80211_sta_work(struct work_struct *work)
2105 {
2106 struct ieee80211_sub_if_data *sdata =
2107 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
2108 struct ieee80211_local *local = sdata->local;
2109 struct ieee80211_if_managed *ifmgd;
2110 struct sk_buff *skb;
2111
2112 if (!netif_running(sdata->dev))
2113 return;
2114
2115 if (local->sw_scanning || local->hw_scanning)
2116 return;
2117
2118 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2119 return;
2120 ifmgd = &sdata->u.mgd;
2121
2122 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
2123 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2124
2125 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2126 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2127 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2128 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2129 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2130 round_jiffies_relative(0));
2131 return;
2132 }
2133
2134 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2135 if (ieee80211_sta_config_auth(sdata))
2136 return;
2137 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2138 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
2139 return;
2140
2141 ieee80211_recalc_idle(local);
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 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2303
2304 return ieee80211_sta_commit(sdata);
2305 }
2306
2307 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2308 const char *ie, size_t len)
2309 {
2310 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2311
2312 kfree(ifmgd->extra_ie);
2313 if (len == 0) {
2314 ifmgd->extra_ie = NULL;
2315 ifmgd->extra_ie_len = 0;
2316 return 0;
2317 }
2318 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2319 if (!ifmgd->extra_ie) {
2320 ifmgd->extra_ie_len = 0;
2321 return -ENOMEM;
2322 }
2323 memcpy(ifmgd->extra_ie, ie, len);
2324 ifmgd->extra_ie_len = len;
2325 return 0;
2326 }
2327
2328 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
2329 {
2330 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2331 sdata->dev->name, reason);
2332
2333 ieee80211_set_disassoc(sdata, true, true, reason);
2334 return 0;
2335 }
2336
2337 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
2338 {
2339 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2340
2341 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2342 sdata->dev->name, reason);
2343
2344 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2345 return -ENOLINK;
2346
2347 ieee80211_set_disassoc(sdata, false, true, reason);
2348 return 0;
2349 }
2350
2351 /* scan finished notification */
2352 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2353 {
2354 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2355
2356 /* Restart STA timers */
2357 rcu_read_lock();
2358 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2359 ieee80211_restart_sta_timer(sdata);
2360 rcu_read_unlock();
2361 }
2362
2363 int ieee80211_max_network_latency(struct notifier_block *nb,
2364 unsigned long data, void *dummy)
2365 {
2366 s32 latency_usec = (s32) data;
2367 struct ieee80211_local *local =
2368 container_of(nb, struct ieee80211_local,
2369 network_latency_notifier);
2370
2371 mutex_lock(&local->iflist_mtx);
2372 ieee80211_recalc_ps(local, latency_usec);
2373 mutex_unlock(&local->iflist_mtx);
2374
2375 return 0;
2376 }
ubuntu-zesty-kernel mirror