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b43: Fix some MAC locking
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB
1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.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
5b323edb 14#include <linux/delay.h>
f0706e82
JB
15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82
JB
17#include <linux/if_arp.h>
18#include <linux/wireless.h>
19#include <linux/random.h>
20#include <linux/etherdevice.h>
d0709a65 21#include <linux/rtnetlink.h>
f0706e82 22#include <net/iw_handler.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
2c8dccc7
JB
27#include "rate.h"
28#include "led.h"
f0706e82 29
6042a3e3 30#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB
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_INTERVAL (60 * HZ)
37#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38#define IEEE80211_SCAN_INTERVAL (2 * HZ)
39#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 40#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82 41
f0706e82
JB
42#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
43#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
44
45#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
46
47
5484e237
JB
48/* utils */
49static int ecw2cw(int ecw)
60f8b39c 50{
5484e237 51 return (1 << ecw) - 1;
60f8b39c
JB
52}
53
c2b13452 54static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43ac2ca3
JM
55{
56 u8 *end, *pos;
57
58 pos = bss->ies;
59 if (pos == NULL)
60 return NULL;
61 end = pos + bss->ies_len;
62
63 while (pos + 1 < end) {
64 if (pos + 2 + pos[1] > end)
65 break;
66 if (pos[0] == ie)
67 return pos;
68 pos += 2 + pos[1];
69 }
70
71 return NULL;
72}
73
c2b13452 74static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90
JB
75 struct ieee80211_supported_band *sband,
76 u64 *rates)
77{
78 int i, j, count;
79 *rates = 0;
80 count = 0;
81 for (i = 0; i < bss->supp_rates_len; i++) {
82 int rate = (bss->supp_rates[i] & 0x7F) * 5;
83
84 for (j = 0; j < sband->n_bitrates; j++)
85 if (sband->bitrates[j].bitrate == rate) {
86 *rates |= BIT(j);
87 count++;
88 break;
89 }
90 }
91
92 return count;
93}
94
9c6bd790
JB
95/* also used by mesh code */
96u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
97 struct ieee802_11_elems *elems,
98 enum ieee80211_band band)
60f8b39c 99{
9c6bd790
JB
100 struct ieee80211_supported_band *sband;
101 struct ieee80211_rate *bitrates;
102 size_t num_rates;
103 u64 supp_rates;
104 int i, j;
105 sband = local->hw.wiphy->bands[band];
60f8b39c 106
9c6bd790
JB
107 if (!sband) {
108 WARN_ON(1);
109 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
60f8b39c 110 }
60f8b39c 111
9c6bd790
JB
112 bitrates = sband->bitrates;
113 num_rates = sband->n_bitrates;
114 supp_rates = 0;
115 for (i = 0; i < elems->supp_rates_len +
116 elems->ext_supp_rates_len; i++) {
117 u8 rate = 0;
118 int own_rate;
119 if (i < elems->supp_rates_len)
120 rate = elems->supp_rates[i];
121 else if (elems->ext_supp_rates)
122 rate = elems->ext_supp_rates
123 [i - elems->supp_rates_len];
124 own_rate = 5 * (rate & 0x7f);
125 for (j = 0; j < num_rates; j++)
126 if (bitrates[j].bitrate == own_rate)
127 supp_rates |= BIT(j);
128 }
129 return supp_rates;
60f8b39c
JB
130}
131
9c6bd790
JB
132/* frame sending functions */
133
134/* also used by scanning code */
0a51b27e
JB
135void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
136 u8 *ssid, size_t ssid_len)
60f8b39c
JB
137{
138 struct ieee80211_local *local = sdata->local;
139 struct ieee80211_supported_band *sband;
140 struct sk_buff *skb;
141 struct ieee80211_mgmt *mgmt;
142 u8 *pos, *supp_rates, *esupp_rates = NULL;
143 int i;
144
145 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
146 if (!skb) {
147 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
148 "request\n", sdata->dev->name);
149 return;
150 }
151 skb_reserve(skb, local->hw.extra_tx_headroom);
152
153 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
154 memset(mgmt, 0, 24);
155 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
156 IEEE80211_STYPE_PROBE_REQ);
157 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
158 if (dst) {
159 memcpy(mgmt->da, dst, ETH_ALEN);
160 memcpy(mgmt->bssid, dst, ETH_ALEN);
161 } else {
162 memset(mgmt->da, 0xff, ETH_ALEN);
163 memset(mgmt->bssid, 0xff, ETH_ALEN);
164 }
165 pos = skb_put(skb, 2 + ssid_len);
166 *pos++ = WLAN_EID_SSID;
167 *pos++ = ssid_len;
168 memcpy(pos, ssid, ssid_len);
169
170 supp_rates = skb_put(skb, 2);
171 supp_rates[0] = WLAN_EID_SUPP_RATES;
172 supp_rates[1] = 0;
173 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
174
175 for (i = 0; i < sband->n_bitrates; i++) {
176 struct ieee80211_rate *rate = &sband->bitrates[i];
177 if (esupp_rates) {
178 pos = skb_put(skb, 1);
179 esupp_rates[1]++;
180 } else if (supp_rates[1] == 8) {
181 esupp_rates = skb_put(skb, 3);
182 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
183 esupp_rates[1] = 1;
184 pos = &esupp_rates[2];
185 } else {
186 pos = skb_put(skb, 1);
187 supp_rates[1]++;
188 }
189 *pos = rate->bitrate / 5;
190 }
191
e50db65c 192 ieee80211_tx_skb(sdata, skb, 0);
60f8b39c
JB
193}
194
9c6bd790
JB
195static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
196 struct ieee80211_if_sta *ifsta,
197 int transaction, u8 *extra, size_t extra_len,
198 int encrypt)
199{
200 struct ieee80211_local *local = sdata->local;
201 struct sk_buff *skb;
202 struct ieee80211_mgmt *mgmt;
203
204 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
205 sizeof(*mgmt) + 6 + extra_len);
206 if (!skb) {
207 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
208 "frame\n", sdata->dev->name);
209 return;
210 }
211 skb_reserve(skb, local->hw.extra_tx_headroom);
212
213 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
214 memset(mgmt, 0, 24 + 6);
215 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
216 IEEE80211_STYPE_AUTH);
217 if (encrypt)
218 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
219 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
220 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
221 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
222 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
223 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
224 ifsta->auth_transaction = transaction + 1;
225 mgmt->u.auth.status_code = cpu_to_le16(0);
226 if (extra)
227 memcpy(skb_put(skb, extra_len), extra, extra_len);
228
229 ieee80211_tx_skb(sdata, skb, encrypt);
230}
231
9ac19a90
JB
232static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
233 struct ieee80211_if_sta *ifsta)
234{
235 struct ieee80211_local *local = sdata->local;
236 struct sk_buff *skb;
237 struct ieee80211_mgmt *mgmt;
d9fe60de 238 u8 *pos, *ies, *ht_ie;
9ac19a90
JB
239 int i, len, count, rates_len, supp_rates_len;
240 u16 capab;
c2b13452 241 struct ieee80211_bss *bss;
9ac19a90
JB
242 int wmm = 0;
243 struct ieee80211_supported_band *sband;
244 u64 rates = 0;
245
246 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
247 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
248 ifsta->ssid_len);
249 if (!skb) {
250 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
251 "frame\n", sdata->dev->name);
252 return;
253 }
254 skb_reserve(skb, local->hw.extra_tx_headroom);
255
256 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
257
258 capab = ifsta->capab;
259
260 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
261 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
262 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
263 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
264 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
265 }
266
267 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
268 local->hw.conf.channel->center_freq,
269 ifsta->ssid, ifsta->ssid_len);
270 if (bss) {
271 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
272 capab |= WLAN_CAPABILITY_PRIVACY;
273 if (bss->wmm_used)
274 wmm = 1;
275
276 /* get all rates supported by the device and the AP as
277 * some APs don't like getting a superset of their rates
278 * in the association request (e.g. D-Link DAP 1353 in
279 * b-only mode) */
280 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
281
282 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
283 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
284 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
285
286 ieee80211_rx_bss_put(local, bss);
287 } else {
288 rates = ~0;
289 rates_len = sband->n_bitrates;
290 }
291
292 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
293 memset(mgmt, 0, 24);
294 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
295 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
296 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
297
298 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
299 skb_put(skb, 10);
300 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
301 IEEE80211_STYPE_REASSOC_REQ);
302 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
303 mgmt->u.reassoc_req.listen_interval =
304 cpu_to_le16(local->hw.conf.listen_interval);
305 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
306 ETH_ALEN);
307 } else {
308 skb_put(skb, 4);
309 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
310 IEEE80211_STYPE_ASSOC_REQ);
311 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 312 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB
313 cpu_to_le16(local->hw.conf.listen_interval);
314 }
315
316 /* SSID */
317 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
318 *pos++ = WLAN_EID_SSID;
319 *pos++ = ifsta->ssid_len;
320 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
321
322 /* add all rates which were marked to be used above */
323 supp_rates_len = rates_len;
324 if (supp_rates_len > 8)
325 supp_rates_len = 8;
326
327 len = sband->n_bitrates;
328 pos = skb_put(skb, supp_rates_len + 2);
329 *pos++ = WLAN_EID_SUPP_RATES;
330 *pos++ = supp_rates_len;
331
332 count = 0;
333 for (i = 0; i < sband->n_bitrates; i++) {
334 if (BIT(i) & rates) {
335 int rate = sband->bitrates[i].bitrate;
336 *pos++ = (u8) (rate / 5);
337 if (++count == 8)
338 break;
339 }
340 }
341
342 if (rates_len > count) {
343 pos = skb_put(skb, rates_len - count + 2);
344 *pos++ = WLAN_EID_EXT_SUPP_RATES;
345 *pos++ = rates_len - count;
346
347 for (i++; i < sband->n_bitrates; i++) {
348 if (BIT(i) & rates) {
349 int rate = sband->bitrates[i].bitrate;
350 *pos++ = (u8) (rate / 5);
351 }
352 }
353 }
354
355 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
356 /* 1. power capabilities */
357 pos = skb_put(skb, 4);
358 *pos++ = WLAN_EID_PWR_CAPABILITY;
359 *pos++ = 2;
360 *pos++ = 0; /* min tx power */
361 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
362
363 /* 2. supported channels */
364 /* TODO: get this in reg domain format */
365 pos = skb_put(skb, 2 * sband->n_channels + 2);
366 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
367 *pos++ = 2 * sband->n_channels;
368 for (i = 0; i < sband->n_channels; i++) {
369 *pos++ = ieee80211_frequency_to_channel(
370 sband->channels[i].center_freq);
371 *pos++ = 1; /* one channel in the subband*/
372 }
373 }
374
375 if (ifsta->extra_ie) {
376 pos = skb_put(skb, ifsta->extra_ie_len);
377 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
378 }
379
380 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
381 pos = skb_put(skb, 9);
382 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
383 *pos++ = 7; /* len */
384 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
385 *pos++ = 0x50;
386 *pos++ = 0xf2;
387 *pos++ = 2; /* WME */
388 *pos++ = 0; /* WME info */
389 *pos++ = 1; /* WME ver */
390 *pos++ = 0;
391 }
392
393 /* wmm support is a must to HT */
394 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de
JB
395 sband->ht_cap.ht_supported &&
396 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
397 ht_ie[1] >= sizeof(struct ieee80211_ht_info)) {
398 struct ieee80211_ht_info *ht_info =
399 (struct ieee80211_ht_info *)(ht_ie + 2);
400 u16 cap = sband->ht_cap.cap;
9ac19a90
JB
401 __le16 tmp;
402 u32 flags = local->hw.conf.channel->flags;
403
d9fe60de
JB
404 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
405 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
9ac19a90 406 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
d9fe60de 407 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB
408 cap &= ~IEEE80211_HT_CAP_SGI_40;
409 }
410 break;
d9fe60de 411 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
9ac19a90 412 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
d9fe60de 413 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB
414 cap &= ~IEEE80211_HT_CAP_SGI_40;
415 }
416 break;
417 }
418
419 tmp = cpu_to_le16(cap);
420 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
421 *pos++ = WLAN_EID_HT_CAPABILITY;
422 *pos++ = sizeof(struct ieee80211_ht_cap);
423 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
424 memcpy(pos, &tmp, sizeof(u16));
425 pos += sizeof(u16);
426 /* TODO: needs a define here for << 2 */
d9fe60de
JB
427 *pos++ = sband->ht_cap.ampdu_factor |
428 (sband->ht_cap.ampdu_density << 2);
429 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB
430 }
431
432 kfree(ifsta->assocreq_ies);
433 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
434 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
435 if (ifsta->assocreq_ies)
436 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
437
e50db65c 438 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB
439}
440
441
ef422bc0
JB
442static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
443 u16 stype, u16 reason)
9ac19a90
JB
444{
445 struct ieee80211_local *local = sdata->local;
ef422bc0 446 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
9ac19a90
JB
447 struct sk_buff *skb;
448 struct ieee80211_mgmt *mgmt;
449
450 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
451 if (!skb) {
ef422bc0
JB
452 printk(KERN_DEBUG "%s: failed to allocate buffer for "
453 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB
454 return;
455 }
456 skb_reserve(skb, local->hw.extra_tx_headroom);
457
458 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
459 memset(mgmt, 0, 24);
460 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
461 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
462 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
ef422bc0 463 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 464 skb_put(skb, 2);
ef422bc0 465 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB
466 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
467
e50db65c 468 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB
469}
470
60f8b39c 471/* MLME */
f698d856 472static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
c2b13452 473 struct ieee80211_bss *bss)
e2839d8f 474{
e2839d8f
VK
475 struct ieee80211_local *local = sdata->local;
476 int i, have_higher_than_11mbit = 0;
477
e2839d8f
VK
478 /* cf. IEEE 802.11 9.2.12 */
479 for (i = 0; i < bss->supp_rates_len; i++)
480 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
481 have_higher_than_11mbit = 1;
482
483 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
484 have_higher_than_11mbit)
485 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
486 else
487 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
488
3d35f7c6 489 ieee80211_set_wmm_default(sdata);
e2839d8f
VK
490}
491
f698d856 492static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB
493 struct ieee80211_if_sta *ifsta,
494 u8 *wmm_param, size_t wmm_param_len)
495{
f0706e82
JB
496 struct ieee80211_tx_queue_params params;
497 size_t left;
498 int count;
499 u8 *pos;
500
3434fbd3
JB
501 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
502 return;
503
504 if (!wmm_param)
505 return;
506
f0706e82
JB
507 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
508 return;
509 count = wmm_param[6] & 0x0f;
510 if (count == ifsta->wmm_last_param_set)
511 return;
512 ifsta->wmm_last_param_set = count;
513
514 pos = wmm_param + 8;
515 left = wmm_param_len - 8;
516
517 memset(&params, 0, sizeof(params));
518
519 if (!local->ops->conf_tx)
520 return;
521
522 local->wmm_acm = 0;
523 for (; left >= 4; left -= 4, pos += 4) {
524 int aci = (pos[0] >> 5) & 0x03;
525 int acm = (pos[0] >> 4) & 0x01;
526 int queue;
527
528 switch (aci) {
529 case 1:
e100bb64 530 queue = 3;
988c0f72 531 if (acm)
f0706e82 532 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB
533 break;
534 case 2:
e100bb64 535 queue = 1;
988c0f72 536 if (acm)
f0706e82 537 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB
538 break;
539 case 3:
e100bb64 540 queue = 0;
988c0f72 541 if (acm)
f0706e82 542 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB
543 break;
544 case 0:
545 default:
e100bb64 546 queue = 2;
988c0f72 547 if (acm)
f0706e82 548 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB
549 break;
550 }
551
552 params.aifs = pos[0] & 0x0f;
553 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
554 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 555 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 556#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 557 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 558 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 559 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB
560 params.cw_max, params.txop);
561#endif
f0706e82
JB
562 /* TODO: handle ACM (block TX, fallback to next lowest allowed
563 * AC for now) */
564 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
565 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 566 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB
567 }
568 }
569}
570
7a5158ef
JB
571static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
572 u16 capab, bool erp_valid, u8 erp)
5628221c 573{
bda3933a 574 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ebd74487 575#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 576 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ebd74487 577#endif
471b3efd 578 u32 changed = 0;
7a5158ef
JB
579 bool use_protection;
580 bool use_short_preamble;
581 bool use_short_slot;
582
583 if (erp_valid) {
584 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
585 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
586 } else {
587 use_protection = false;
588 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
589 }
590
591 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 592
471b3efd 593 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 594#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 595 if (net_ratelimit()) {
0c68ae26 596 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
471b3efd 597 sdata->dev->name,
5628221c 598 use_protection ? "enabled" : "disabled",
0c68ae26 599 ifsta->bssid);
5628221c 600 }
f4ea83dd 601#endif
471b3efd
JB
602 bss_conf->use_cts_prot = use_protection;
603 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 604 }
7e9ed188 605
d43c7b37 606 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 607#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD
608 if (net_ratelimit()) {
609 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0c68ae26 610 " (BSSID=%pM)\n",
471b3efd 611 sdata->dev->name,
d43c7b37 612 use_short_preamble ? "short" : "long",
0c68ae26 613 ifsta->bssid);
7e9ed188 614 }
f4ea83dd 615#endif
d43c7b37 616 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 617 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 618 }
d9430a32 619
7a5158ef
JB
620 if (use_short_slot != bss_conf->use_short_slot) {
621#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
622 if (net_ratelimit()) {
623 printk(KERN_DEBUG "%s: switched to %s slot"
624 " (BSSID=%s)\n",
625 sdata->dev->name,
626 use_short_slot ? "short" : "long",
627 ifsta->bssid);
628 }
629#endif
630 bss_conf->use_short_slot = use_short_slot;
631 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL
632 }
633
634 return changed;
635}
636
f5e5bf25
TW
637static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
638 struct ieee80211_if_sta *ifsta)
639{
640 union iwreq_data wrqu;
641 memset(&wrqu, 0, sizeof(wrqu));
642 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
643 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
644 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
645 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
646}
647
f698d856 648static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
649 struct ieee80211_if_sta *ifsta)
650{
74af0250
LT
651 char *buf;
652 size_t len;
653 int i;
f0706e82
JB
654 union iwreq_data wrqu;
655
74af0250
LT
656 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
657 return;
658
659 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
660 ifsta->assocresp_ies_len), GFP_KERNEL);
661 if (!buf)
662 return;
663
664 len = sprintf(buf, "ASSOCINFO(");
f0706e82 665 if (ifsta->assocreq_ies) {
74af0250
LT
666 len += sprintf(buf + len, "ReqIEs=");
667 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
668 len += sprintf(buf + len, "%02x",
669 ifsta->assocreq_ies[i]);
670 }
f0706e82 671 }
087d833e 672 if (ifsta->assocresp_ies) {
74af0250
LT
673 if (ifsta->assocreq_ies)
674 len += sprintf(buf + len, " ");
675 len += sprintf(buf + len, "RespIEs=");
676 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
677 len += sprintf(buf + len, "%02x",
678 ifsta->assocresp_ies[i]);
679 }
f0706e82 680 }
74af0250
LT
681 len += sprintf(buf + len, ")");
682
683 if (len > IW_CUSTOM_MAX) {
684 len = sprintf(buf, "ASSOCRESPIE=");
685 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
686 len += sprintf(buf + len, "%02x",
687 ifsta->assocresp_ies[i]);
688 }
689 }
690
ad788b5e
JL
691 if (len <= IW_CUSTOM_MAX) {
692 memset(&wrqu, 0, sizeof(wrqu));
693 wrqu.data.length = len;
694 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
695 }
74af0250
LT
696
697 kfree(buf);
f0706e82
JB
698}
699
700
f698d856 701static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ae5eb026
JB
702 struct ieee80211_if_sta *ifsta,
703 u32 bss_info_changed)
f0706e82 704{
471b3efd 705 struct ieee80211_local *local = sdata->local;
38668c05 706 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 707
c2b13452 708 struct ieee80211_bss *bss;
d6f2da5b 709
ae5eb026 710 bss_info_changed |= BSS_CHANGED_ASSOC;
f5e5bf25 711 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 712
05c914fe 713 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f5e5bf25 714 return;
21c0cbe7 715
f5e5bf25
TW
716 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
717 conf->channel->center_freq,
718 ifsta->ssid, ifsta->ssid_len);
719 if (bss) {
720 /* set timing information */
bda3933a
JB
721 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
722 sdata->vif.bss_conf.timestamp = bss->timestamp;
723 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 724
ae5eb026 725 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
7a5158ef 726 bss->capability, bss->has_erp_value, bss->erp_value);
9ac19a90
JB
727
728 ieee80211_rx_bss_put(local, bss);
f0706e82
JB
729 }
730
9ac19a90
JB
731 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
732 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
733 ieee80211_sta_send_associnfo(sdata, ifsta);
9306102e 734
9ac19a90
JB
735 ifsta->last_probe = jiffies;
736 ieee80211_led_assoc(local, 1);
9306102e 737
bda3933a 738 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB
739 /*
740 * For now just always ask the driver to update the basic rateset
741 * when we have associated, we aren't checking whether it actually
742 * changed or not.
743 */
ae5eb026
JB
744 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
745 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 746
9ac19a90
JB
747 netif_tx_start_all_queues(sdata->dev);
748 netif_carrier_on(sdata->dev);
f0706e82 749
9ac19a90 750 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB
751}
752
9ac19a90
JB
753static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
754 struct ieee80211_if_sta *ifsta)
f0706e82 755{
9ac19a90
JB
756 ifsta->direct_probe_tries++;
757 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26
JB
758 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
759 sdata->dev->name, ifsta->bssid);
9ac19a90 760 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 761 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB
762 return;
763 }
f0706e82 764
0c68ae26
JB
765 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
766 sdata->dev->name, ifsta->bssid,
9ac19a90 767 ifsta->direct_probe_tries);
f0706e82 768
9ac19a90 769 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 770
9ac19a90
JB
771 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
772
773 /* Direct probe is sent to broadcast address as some APs
774 * will not answer to direct packet in unassociated state.
775 */
776 ieee80211_send_probe_req(sdata, NULL,
777 ifsta->ssid, ifsta->ssid_len);
778
779 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 780}
f0706e82 781
9ac19a90
JB
782
783static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
784 struct ieee80211_if_sta *ifsta)
f0706e82 785{
9ac19a90
JB
786 ifsta->auth_tries++;
787 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 788 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 789 " timed out\n",
0c68ae26 790 sdata->dev->name, ifsta->bssid);
9ac19a90 791 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 792 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB
793 return;
794 }
f0706e82 795
9ac19a90 796 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26
JB
797 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
798 sdata->dev->name, ifsta->bssid);
f0706e82 799
9ac19a90
JB
800 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
801
802 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB
803}
804
5925d976
VN
805/*
806 * The disassoc 'reason' argument can be either our own reason
807 * if self disconnected or a reason code from the AP.
808 */
aa458d17
TW
809static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
810 struct ieee80211_if_sta *ifsta, bool deauth,
811 bool self_disconnected, u16 reason)
812{
813 struct ieee80211_local *local = sdata->local;
814 struct sta_info *sta;
ae5eb026 815 u32 changed = 0;
aa458d17
TW
816
817 rcu_read_lock();
818
819 sta = sta_info_get(local, ifsta->bssid);
820 if (!sta) {
821 rcu_read_unlock();
822 return;
823 }
824
825 if (deauth) {
826 ifsta->direct_probe_tries = 0;
827 ifsta->auth_tries = 0;
828 }
829 ifsta->assoc_scan_tries = 0;
830 ifsta->assoc_tries = 0;
831
24e64622 832 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW
833 netif_carrier_off(sdata->dev);
834
17741cdc 835 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
aa458d17
TW
836
837 if (self_disconnected) {
838 if (deauth)
ef422bc0
JB
839 ieee80211_send_deauth_disassoc(sdata,
840 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 841 else
ef422bc0
JB
842 ieee80211_send_deauth_disassoc(sdata,
843 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW
844 }
845
f5e5bf25
TW
846 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
847 changed |= ieee80211_reset_erp_info(sdata);
848
f5e5bf25 849 ieee80211_led_assoc(local, 0);
ae5eb026
JB
850 changed |= BSS_CHANGED_ASSOC;
851 sdata->vif.bss_conf.assoc = false;
f5e5bf25
TW
852
853 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17 854
5925d976 855 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
aa458d17
TW
856 ifsta->state = IEEE80211_STA_MLME_DISABLED;
857
aa458d17
TW
858 rcu_read_unlock();
859
ae5eb026 860 local->hw.conf.ht.enabled = false;
094d05dc 861 local->oper_channel_type = NL80211_CHAN_NO_HT;
ae5eb026
JB
862 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT);
863
864 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW
865
866 rcu_read_lock();
867
868 sta = sta_info_get(local, ifsta->bssid);
869 if (!sta) {
870 rcu_read_unlock();
871 return;
872 }
873
874 sta_info_unlink(&sta);
875
876 rcu_read_unlock();
877
878 sta_info_destroy(sta);
aa458d17 879}
f0706e82 880
9ac19a90
JB
881static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
882{
883 if (!sdata || !sdata->default_key ||
884 sdata->default_key->conf.alg != ALG_WEP)
885 return 0;
886 return 1;
887}
888
f698d856 889static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
890 struct ieee80211_if_sta *ifsta)
891{
f698d856 892 struct ieee80211_local *local = sdata->local;
c2b13452 893 struct ieee80211_bss *bss;
5b98b1f7
JB
894 int bss_privacy;
895 int wep_privacy;
896 int privacy_invoked;
f0706e82 897
5b98b1f7 898 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB
899 return 0;
900
f698d856 901 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 902 local->hw.conf.channel->center_freq,
cffdd30d 903 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB
904 if (!bss)
905 return 0;
906
5b98b1f7 907 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 908 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 909 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 910
3e122be0 911 ieee80211_rx_bss_put(local, bss);
f0706e82 912
5b98b1f7
JB
913 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
914 return 0;
915
916 return 1;
f0706e82
JB
917}
918
f698d856 919static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
920 struct ieee80211_if_sta *ifsta)
921{
922 ifsta->assoc_tries++;
923 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 924 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 925 " timed out\n",
0c68ae26 926 sdata->dev->name, ifsta->bssid);
48c2fc59 927 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 928 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB
929 return;
930 }
931
48c2fc59 932 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26
JB
933 printk(KERN_DEBUG "%s: associate with AP %pM\n",
934 sdata->dev->name, ifsta->bssid);
f698d856 935 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 936 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 937 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 938 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB
939 return;
940 }
941
f698d856 942 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB
943
944 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
945}
946
947
f698d856 948static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
949 struct ieee80211_if_sta *ifsta)
950{
f698d856 951 struct ieee80211_local *local = sdata->local;
f0706e82
JB
952 struct sta_info *sta;
953 int disassoc;
954
955 /* TODO: start monitoring current AP signal quality and number of
956 * missed beacons. Scan other channels every now and then and search
957 * for better APs. */
958 /* TODO: remove expired BSSes */
959
48c2fc59 960 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 961
d0709a65
JB
962 rcu_read_lock();
963
f0706e82
JB
964 sta = sta_info_get(local, ifsta->bssid);
965 if (!sta) {
0c68ae26
JB
966 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
967 sdata->dev->name, ifsta->bssid);
f0706e82
JB
968 disassoc = 1;
969 } else {
970 disassoc = 0;
971 if (time_after(jiffies,
972 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 973 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 974 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 975 "current AP %pM - assume out of "
f0706e82 976 "range\n",
0c68ae26 977 sdata->dev->name, ifsta->bssid);
f0706e82 978 disassoc = 1;
d6f2da5b 979 } else
f698d856 980 ieee80211_send_probe_req(sdata, ifsta->bssid,
4dfe51e1
JB
981 ifsta->ssid,
982 ifsta->ssid_len);
d6f2da5b 983 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 984 } else {
d6f2da5b 985 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB
986 if (time_after(jiffies, ifsta->last_probe +
987 IEEE80211_PROBE_INTERVAL)) {
988 ifsta->last_probe = jiffies;
f698d856 989 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB
990 ifsta->ssid,
991 ifsta->ssid_len);
992 }
993 }
f0706e82 994 }
d0709a65
JB
995
996 rcu_read_unlock();
997
60f8b39c
JB
998 if (disassoc)
999 ieee80211_set_disassoc(sdata, ifsta, true, true,
1000 WLAN_REASON_PREV_AUTH_NOT_VALID);
1001 else
1002 mod_timer(&ifsta->timer, jiffies +
1003 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB
1004}
1005
1006
f698d856 1007static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1008 struct ieee80211_if_sta *ifsta)
1009{
f698d856 1010 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1011 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1012 ieee80211_associate(sdata, ifsta);
f0706e82
JB
1013}
1014
1015
f698d856 1016static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1017 struct ieee80211_if_sta *ifsta,
1018 struct ieee80211_mgmt *mgmt,
1019 size_t len)
1020{
1021 u8 *pos;
1022 struct ieee802_11_elems elems;
1023
f0706e82 1024 pos = mgmt->u.auth.variable;
67a4cce4 1025 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1026 if (!elems.challenge)
f0706e82 1027 return;
f698d856 1028 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB
1029 elems.challenge_len + 2, 1);
1030}
1031
f698d856 1032static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1033 struct ieee80211_if_sta *ifsta,
1034 struct ieee80211_mgmt *mgmt,
1035 size_t len)
1036{
f0706e82
JB
1037 u16 auth_alg, auth_transaction, status_code;
1038
48c2fc59 1039 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
05c914fe 1040 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82 1041 return;
f0706e82 1042
f4ea83dd 1043 if (len < 24 + 6)
f0706e82 1044 return;
f0706e82 1045
05c914fe 1046 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1047 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1048 return;
f0706e82 1049
05c914fe 1050 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1051 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1052 return;
f0706e82
JB
1053
1054 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1055 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1056 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1057
05c914fe 1058 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
135a2110
JB
1059 /*
1060 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB
1061 * networks and most implementations do not seem to use it.
1062 * However, try to reply to authentication attempts if someone
1063 * has actually implemented this.
135a2110 1064 */
f4ea83dd 1065 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1066 return;
f698d856 1067 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB
1068 }
1069
1070 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1071 auth_transaction != ifsta->auth_transaction)
f0706e82 1072 return;
f0706e82
JB
1073
1074 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB
1075 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1076 u8 algs[3];
1077 const int num_algs = ARRAY_SIZE(algs);
1078 int i, pos;
1079 algs[0] = algs[1] = algs[2] = 0xff;
1080 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1081 algs[0] = WLAN_AUTH_OPEN;
1082 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1083 algs[1] = WLAN_AUTH_SHARED_KEY;
1084 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1085 algs[2] = WLAN_AUTH_LEAP;
1086 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1087 pos = 0;
1088 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1089 pos = 1;
1090 else
1091 pos = 2;
1092 for (i = 0; i < num_algs; i++) {
1093 pos++;
1094 if (pos >= num_algs)
1095 pos = 0;
1096 if (algs[pos] == ifsta->auth_alg ||
1097 algs[pos] == 0xff)
1098 continue;
1099 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1100 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB
1101 continue;
1102 ifsta->auth_alg = algs[pos];
f0706e82
JB
1103 break;
1104 }
1105 }
1106 return;
1107 }
1108
1109 switch (ifsta->auth_alg) {
1110 case WLAN_AUTH_OPEN:
1111 case WLAN_AUTH_LEAP:
f698d856 1112 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB
1113 break;
1114 case WLAN_AUTH_SHARED_KEY:
1115 if (ifsta->auth_transaction == 4)
f698d856 1116 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1117 else
f698d856 1118 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB
1119 break;
1120 }
1121}
1122
1123
f698d856 1124static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1125 struct ieee80211_if_sta *ifsta,
1126 struct ieee80211_mgmt *mgmt,
1127 size_t len)
1128{
1129 u16 reason_code;
1130
f4ea83dd 1131 if (len < 24 + 2)
f0706e82 1132 return;
f0706e82 1133
f4ea83dd 1134 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1135 return;
f0706e82
JB
1136
1137 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1138
988c0f72 1139 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY
1140 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1141 sdata->dev->name, reason_code);
f0706e82 1142
48c2fc59
TW
1143 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1144 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1145 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1146 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB
1147 mod_timer(&ifsta->timer, jiffies +
1148 IEEE80211_RETRY_AUTH_INTERVAL);
1149 }
1150
aa458d17 1151 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1152 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB
1153}
1154
1155
f698d856 1156static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1157 struct ieee80211_if_sta *ifsta,
1158 struct ieee80211_mgmt *mgmt,
1159 size_t len)
1160{
1161 u16 reason_code;
1162
f4ea83dd 1163 if (len < 24 + 2)
f0706e82 1164 return;
f0706e82 1165
f4ea83dd 1166 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1167 return;
f0706e82
JB
1168
1169 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1170
d6f2da5b 1171 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY
1172 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1173 sdata->dev->name, reason_code);
f0706e82 1174
48c2fc59
TW
1175 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1176 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB
1177 mod_timer(&ifsta->timer, jiffies +
1178 IEEE80211_RETRY_AUTH_INTERVAL);
1179 }
1180
5925d976 1181 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
f0706e82
JB
1182}
1183
1184
471b3efd 1185static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1186 struct ieee80211_if_sta *ifsta,
1187 struct ieee80211_mgmt *mgmt,
1188 size_t len,
1189 int reassoc)
1190{
471b3efd 1191 struct ieee80211_local *local = sdata->local;
8318d78a 1192 struct ieee80211_supported_band *sband;
f0706e82 1193 struct sta_info *sta;
8318d78a 1194 u64 rates, basic_rates;
f0706e82
JB
1195 u16 capab_info, status_code, aid;
1196 struct ieee802_11_elems elems;
bda3933a 1197 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1198 u8 *pos;
ae5eb026 1199 u32 changed = 0;
f0706e82 1200 int i, j;
ddf4ac53 1201 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1202 u16 ap_ht_cap_flags;
f0706e82
JB
1203
1204 /* AssocResp and ReassocResp have identical structure, so process both
1205 * of them in this function. */
1206
48c2fc59 1207 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1208 return;
f0706e82 1209
f4ea83dd 1210 if (len < 24 + 6)
f0706e82 1211 return;
f0706e82 1212
f4ea83dd 1213 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1214 return;
f0706e82
JB
1215
1216 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1217 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1218 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1219
0c68ae26 1220 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1221 "status=%d aid=%d)\n",
0c68ae26 1222 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1223 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB
1224
1225 if (status_code != WLAN_STATUS_SUCCESS) {
1226 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1227 sdata->dev->name, status_code);
8a69aa93
DD
1228 /* if this was a reassociation, ensure we try a "full"
1229 * association next time. This works around some broken APs
1230 * which do not correctly reject reassociation requests. */
d6f2da5b 1231 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB
1232 return;
1233 }
1234
1dd84aa2
JB
1235 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1236 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1237 "set\n", sdata->dev->name, aid);
1dd84aa2
JB
1238 aid &= ~(BIT(15) | BIT(14));
1239
f0706e82 1240 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1241 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB
1242
1243 if (!elems.supp_rates) {
1244 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1245 sdata->dev->name);
f0706e82
JB
1246 return;
1247 }
1248
f698d856 1249 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB
1250 ifsta->aid = aid;
1251 ifsta->ap_capab = capab_info;
1252
1253 kfree(ifsta->assocresp_ies);
1254 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1255 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB
1256 if (ifsta->assocresp_ies)
1257 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1258
d0709a65
JB
1259 rcu_read_lock();
1260
f0706e82
JB
1261 /* Add STA entry for the AP */
1262 sta = sta_info_get(local, ifsta->bssid);
1263 if (!sta) {
c2b13452 1264 struct ieee80211_bss *bss;
ddf4ac53
JB
1265
1266 newsta = true;
d0709a65 1267
73651ee6
JB
1268 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1269 if (!sta) {
1270 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1271 " the AP\n", sdata->dev->name);
d0709a65 1272 rcu_read_unlock();
f0706e82
JB
1273 return;
1274 }
60f8b39c
JB
1275 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1276 local->hw.conf.channel->center_freq,
1277 ifsta->ssid, ifsta->ssid_len);
1278 if (bss) {
1279 sta->last_signal = bss->signal;
1280 sta->last_qual = bss->qual;
1281 sta->last_noise = bss->noise;
1282 ieee80211_rx_bss_put(local, bss);
1283 }
f709fc69 1284
60f8b39c
JB
1285 /* update new sta with its last rx activity */
1286 sta->last_rx = jiffies;
f709fc69 1287 }
f709fc69 1288
60f8b39c
JB
1289 /*
1290 * FIXME: Do we really need to update the sta_info's information here?
1291 * We already know about the AP (we found it in our list) so it
1292 * should already be filled with the right info, no?
1293 * As is stands, all this is racy because typically we assume
1294 * the information that is filled in here (except flags) doesn't
1295 * change while a STA structure is alive. As such, it should move
1296 * to between the sta_info_alloc() and sta_info_insert() above.
1297 */
f709fc69 1298
60f8b39c
JB
1299 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1300 WLAN_STA_AUTHORIZED);
05e5e883 1301
60f8b39c
JB
1302 rates = 0;
1303 basic_rates = 0;
1304 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1305
60f8b39c
JB
1306 for (i = 0; i < elems.supp_rates_len; i++) {
1307 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1308 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1309
60f8b39c
JB
1310 if (rate > 110)
1311 have_higher_than_11mbit = true;
1312
1313 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1314 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1315 rates |= BIT(j);
d61272cb
TW
1316 if (is_basic)
1317 basic_rates |= BIT(j);
1318 break;
1319 }
f709fc69 1320 }
f709fc69
LCC
1321 }
1322
60f8b39c
JB
1323 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1324 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
d61272cb 1325 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f0706e82 1326
60f8b39c
JB
1327 if (rate > 110)
1328 have_higher_than_11mbit = true;
f0706e82 1329
60f8b39c 1330 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1331 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1332 rates |= BIT(j);
d61272cb
TW
1333 if (is_basic)
1334 basic_rates |= BIT(j);
1335 break;
1336 }
60f8b39c 1337 }
1ebebea8 1338 }
f0706e82 1339
323ce79a 1340 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1341 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB
1342
1343 /* cf. IEEE 802.11 9.2.12 */
1344 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1345 have_higher_than_11mbit)
1346 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1347 else
1348 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1349
ae5eb026
JB
1350 if (elems.ht_cap_elem)
1351 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1352 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB
1353
1354 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1355
4b7679a5 1356 rate_control_rate_init(sta);
f0706e82 1357
ddf4ac53 1358 if (elems.wmm_param)
60f8b39c 1359 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB
1360
1361 if (newsta) {
1362 int err = sta_info_insert(sta);
1363 if (err) {
1364 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1365 " the AP (error %d)\n", sdata->dev->name, err);
1366 rcu_read_unlock();
1367 return;
1368 }
1369 }
1370
1371 rcu_read_unlock();
1372
1373 if (elems.wmm_param)
60f8b39c
JB
1374 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1375 elems.wmm_param_len);
f0706e82 1376
ae5eb026
JB
1377 if (elems.ht_info_elem && elems.wmm_param &&
1378 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1379 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1380 ap_ht_cap_flags);
1381
60f8b39c
JB
1382 /* set AID and assoc capability,
1383 * ieee80211_set_associated() will tell the driver */
1384 bss_conf->aid = aid;
1385 bss_conf->assoc_capability = capab_info;
ae5eb026 1386 ieee80211_set_associated(sdata, ifsta, changed);
f0706e82 1387
60f8b39c 1388 ieee80211_associated(sdata, ifsta);
f0706e82
JB
1389}
1390
1391
f698d856 1392static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a 1393 struct ieee80211_if_sta *ifsta,
c2b13452 1394 struct ieee80211_bss *bss)
a607268a 1395{
f698d856 1396 struct ieee80211_local *local = sdata->local;
a607268a
BR
1397 int res, rates, i, j;
1398 struct sk_buff *skb;
1399 struct ieee80211_mgmt *mgmt;
a607268a 1400 u8 *pos;
a607268a 1401 struct ieee80211_supported_band *sband;
507b06d0 1402 union iwreq_data wrqu;
a607268a 1403
e2ef12d3
RR
1404 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1405 if (!skb) {
1406 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1407 "response\n", sdata->dev->name);
1408 return -ENOMEM;
1409 }
1410
a607268a
BR
1411 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1412
1413 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1414 sta_info_flush_delayed(sdata);
a607268a
BR
1415
1416 if (local->ops->reset_tsf) {
1417 /* Reset own TSF to allow time synchronization work. */
1418 local->ops->reset_tsf(local_to_hw(local));
1419 }
1420 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1421 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR
1422 if (res)
1423 return res;
1424
1425 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1426
a607268a
BR
1427 sdata->drop_unencrypted = bss->capability &
1428 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1429
f698d856 1430 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1431
be038b37
AK
1432 if (res)
1433 return res;
a607268a 1434
9d139c81 1435 /* Build IBSS probe response */
a607268a 1436
e2ef12d3 1437 skb_reserve(skb, local->hw.extra_tx_headroom);
a607268a 1438
e2ef12d3
RR
1439 mgmt = (struct ieee80211_mgmt *)
1440 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1441 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1442 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1443 IEEE80211_STYPE_PROBE_RESP);
1444 memset(mgmt->da, 0xff, ETH_ALEN);
1445 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1446 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1447 mgmt->u.beacon.beacon_int =
1448 cpu_to_le16(local->hw.conf.beacon_int);
1449 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1450 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
a607268a 1451
e2ef12d3
RR
1452 pos = skb_put(skb, 2 + ifsta->ssid_len);
1453 *pos++ = WLAN_EID_SSID;
1454 *pos++ = ifsta->ssid_len;
1455 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
a607268a 1456
e2ef12d3
RR
1457 rates = bss->supp_rates_len;
1458 if (rates > 8)
1459 rates = 8;
1460 pos = skb_put(skb, 2 + rates);
1461 *pos++ = WLAN_EID_SUPP_RATES;
1462 *pos++ = rates;
1463 memcpy(pos, bss->supp_rates, rates);
1464
1465 if (bss->band == IEEE80211_BAND_2GHZ) {
1466 pos = skb_put(skb, 2 + 1);
1467 *pos++ = WLAN_EID_DS_PARAMS;
1468 *pos++ = 1;
1469 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1470 }
a607268a 1471
e2ef12d3
RR
1472 pos = skb_put(skb, 2 + 2);
1473 *pos++ = WLAN_EID_IBSS_PARAMS;
1474 *pos++ = 2;
1475 /* FIX: set ATIM window based on scan results */
1476 *pos++ = 0;
1477 *pos++ = 0;
e039fa4a 1478
e2ef12d3
RR
1479 if (bss->supp_rates_len > 8) {
1480 rates = bss->supp_rates_len - 8;
1481 pos = skb_put(skb, 2 + rates);
1482 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1483 *pos++ = rates;
1484 memcpy(pos, &bss->supp_rates[8], rates);
9d139c81 1485 }
a607268a 1486
e2ef12d3
RR
1487 ifsta->probe_resp = skb;
1488
1489 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1490
1491
9d139c81
JB
1492 rates = 0;
1493 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1494 for (i = 0; i < bss->supp_rates_len; i++) {
1495 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1496 for (j = 0; j < sband->n_bitrates; j++)
1497 if (sband->bitrates[j].bitrate == bitrate)
1498 rates |= BIT(j);
a607268a 1499 }
9d139c81
JB
1500 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1501
b079ada7 1502 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1503
48c2fc59 1504 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR
1505 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1506
4492bea6
EG
1507 ieee80211_led_assoc(local, true);
1508
507b06d0
DW
1509 memset(&wrqu, 0, sizeof(wrqu));
1510 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1511 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR
1512
1513 return res;
1514}
1515
98c8fccf
JB
1516static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1517 struct ieee80211_mgmt *mgmt,
1518 size_t len,
1519 struct ieee80211_rx_status *rx_status,
1520 struct ieee802_11_elems *elems,
1521 bool beacon)
1522{
1523 struct ieee80211_local *local = sdata->local;
1524 int freq;
c2b13452 1525 struct ieee80211_bss *bss;
98c8fccf
JB
1526 struct sta_info *sta;
1527 struct ieee80211_channel *channel;
1528 u64 beacon_timestamp, rx_timestamp;
1529 u64 supp_rates = 0;
1530 enum ieee80211_band band = rx_status->band;
98c8fccf
JB
1531
1532 if (elems->ds_params && elems->ds_params_len == 1)
1533 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1534 else
1535 freq = rx_status->freq;
1536
1537 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1538
1539 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1540 return;
1541
05c914fe 1542 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
98c8fccf
JB
1543 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1544 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1545
1546 rcu_read_lock();
1547
1548 sta = sta_info_get(local, mgmt->sa);
1549 if (sta) {
1550 u64 prev_rates;
1551
323ce79a 1552 prev_rates = sta->sta.supp_rates[band];
98c8fccf 1553 /* make sure mandatory rates are always added */
323ce79a 1554 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 1555 ieee80211_mandatory_rates(local, band);
98c8fccf
JB
1556
1557#ifdef CONFIG_MAC80211_IBSS_DEBUG
323ce79a 1558 if (sta->sta.supp_rates[band] != prev_rates)
98c8fccf 1559 printk(KERN_DEBUG "%s: updated supp_rates set "
0c68ae26 1560 "for %pM based on beacon info (0x%llx | "
98c8fccf 1561 "0x%llx -> 0x%llx)\n",
17741cdc 1562 sdata->dev->name,
0c68ae26 1563 sta->sta.addr,
98c8fccf
JB
1564 (unsigned long long) prev_rates,
1565 (unsigned long long) supp_rates,
323ce79a 1566 (unsigned long long) sta->sta.supp_rates[band]);
98c8fccf
JB
1567#endif
1568 } else {
ab1f5c0b 1569 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
98c8fccf
JB
1570 }
1571
1572 rcu_read_unlock();
1573 }
1574
1575 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1576 freq, beacon);
1577 if (!bss)
1578 return;
1579
1580 /* was just updated in ieee80211_bss_info_update */
1581 beacon_timestamp = bss->timestamp;
1582
30b89b0f
JB
1583 /*
1584 * In STA mode, the remaining parameters should not be overridden
1585 * by beacons because they're not necessarily accurate there.
1586 */
05c914fe 1587 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
9859b81e 1588 bss->last_probe_resp && beacon) {
3e122be0 1589 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB
1590 return;
1591 }
1592
9d9bf77d 1593 /* check if we need to merge IBSS */
05c914fe 1594 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
fba4a1e6 1595 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1596 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK
1597 elems->ssid_len == sdata->u.sta.ssid_len &&
1598 memcmp(elems->ssid, sdata->u.sta.ssid,
1599 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR
1600 if (rx_status->flag & RX_FLAG_TSFT) {
1601 /* in order for correct IBSS merging we need mactime
1602 *
1603 * since mactime is defined as the time the first data
1604 * symbol of the frame hits the PHY, and the timestamp
1605 * of the beacon is defined as "the time that the data
1606 * symbol containing the first bit of the timestamp is
1607 * transmitted to the PHY plus the transmitting STA’s
1608 * delays through its local PHY from the MAC-PHY
1609 * interface to its interface with the WM"
1610 * (802.11 11.1.2) - equals the time this bit arrives at
1611 * the receiver - we have to take into account the
1612 * offset between the two.
1613 * e.g: at 1 MBit that means mactime is 192 usec earlier
1614 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1615 */
0fb8ca45
JM
1616 int rate;
1617 if (rx_status->flag & RX_FLAG_HT) {
1618 rate = 65; /* TODO: HT rates */
1619 } else {
1620 rate = local->hw.wiphy->bands[band]->
9d9bf77d 1621 bitrates[rx_status->rate_idx].bitrate;
0fb8ca45 1622 }
9d9bf77d
BR
1623 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1624 } else if (local && local->ops && local->ops->get_tsf)
1625 /* second best option: get current TSF */
1626 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1627 else
1628 /* can't merge without knowing the TSF */
1629 rx_timestamp = -1LLU;
1630#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB
1631 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1632 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1633 mgmt->sa, mgmt->bssid,
9d9bf77d
BR
1634 (unsigned long long)rx_timestamp,
1635 (unsigned long long)beacon_timestamp,
1636 (unsigned long long)(rx_timestamp - beacon_timestamp),
1637 jiffies);
1638#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1639 if (beacon_timestamp > rx_timestamp) {
576fdeae 1640#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd 1641 printk(KERN_DEBUG "%s: beacon TSF higher than "
0c68ae26
JB
1642 "local TSF - IBSS merge with BSSID %pM\n",
1643 sdata->dev->name, mgmt->bssid);
fba4a1e6 1644#endif
f698d856 1645 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
ab1f5c0b 1646 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
9d9bf77d
BR
1647 }
1648 }
1649
3e122be0 1650 ieee80211_rx_bss_put(local, bss);
f0706e82
JB
1651}
1652
1653
f698d856 1654static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1655 struct ieee80211_mgmt *mgmt,
1656 size_t len,
1657 struct ieee80211_rx_status *rx_status)
1658{
ae6a44e3
EK
1659 size_t baselen;
1660 struct ieee802_11_elems elems;
9859b81e 1661 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1662
8e7cdbb6
TW
1663 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1664 return; /* ignore ProbeResp to foreign address */
1665
ae6a44e3
EK
1666 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1667 if (baselen > len)
1668 return;
1669
1670 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1671 &elems);
1672
98c8fccf 1673 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR
1674
1675 /* direct probe may be part of the association flow */
1676 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1677 &ifsta->request)) {
1678 printk(KERN_DEBUG "%s direct probe responded\n",
1679 sdata->dev->name);
1680 ieee80211_authenticate(sdata, ifsta);
1681 }
f0706e82
JB
1682}
1683
1684
f698d856 1685static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1686 struct ieee80211_mgmt *mgmt,
1687 size_t len,
1688 struct ieee80211_rx_status *rx_status)
1689{
f0706e82 1690 struct ieee80211_if_sta *ifsta;
f0706e82
JB
1691 size_t baselen;
1692 struct ieee802_11_elems elems;
f698d856 1693 struct ieee80211_local *local = sdata->local;
471b3efd 1694 u32 changed = 0;
7a5158ef
JB
1695 bool erp_valid;
1696 u8 erp_value = 0;
f0706e82 1697
ae6a44e3
EK
1698 /* Process beacon from the current BSS */
1699 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1700 if (baselen > len)
1701 return;
1702
1703 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1704
98c8fccf 1705 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1706
05c914fe 1707 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB
1708 return;
1709 ifsta = &sdata->u.sta;
1710
d6f2da5b 1711 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB
1712 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1713 return;
1714
fe3fa827
JB
1715 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1716 elems.wmm_param_len);
1717
7a5158ef
JB
1718
1719 if (elems.erp_info && elems.erp_info_len >= 1) {
1720 erp_valid = true;
1721 erp_value = elems.erp_info[0];
1722 } else {
1723 erp_valid = false;
50c4afb9 1724 }
7a5158ef
JB
1725 changed |= ieee80211_handle_bss_capability(sdata,
1726 le16_to_cpu(mgmt->u.beacon.capab_info),
1727 erp_valid, erp_value);
f0706e82 1728
d3c990fb 1729
ae5eb026
JB
1730 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1731 struct sta_info *sta;
1732 struct ieee80211_supported_band *sband;
1733 u16 ap_ht_cap_flags;
1734
1735 rcu_read_lock();
1736
1737 sta = sta_info_get(local, ifsta->bssid);
1738 if (!sta) {
1739 rcu_read_unlock();
1740 return;
1741 }
1742
1743 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1744
1745 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1746 elems.ht_cap_elem, &sta->sta.ht_cap);
1747
1748 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1749
1750 rcu_read_unlock();
1751
1752 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1753 ap_ht_cap_flags);
d3c990fb
RR
1754 }
1755
3f2355cb
LR
1756 if (elems.country_elem) {
1757 /* Note we are only reviewing this on beacons
1758 * for the BSSID we are associated to */
1759 regulatory_hint_11d(local->hw.wiphy,
1760 elems.country_elem, elems.country_elem_len);
1761 }
1762
471b3efd 1763 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB
1764}
1765
1766
f698d856 1767static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1768 struct ieee80211_if_sta *ifsta,
1769 struct ieee80211_mgmt *mgmt,
1770 size_t len,
1771 struct ieee80211_rx_status *rx_status)
1772{
f698d856 1773 struct ieee80211_local *local = sdata->local;
f0706e82
JB
1774 int tx_last_beacon;
1775 struct sk_buff *skb;
1776 struct ieee80211_mgmt *resp;
1777 u8 *pos, *end;
1778
05c914fe 1779 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
48c2fc59 1780 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB
1781 len < 24 + 2 || !ifsta->probe_resp)
1782 return;
1783
1784 if (local->ops->tx_last_beacon)
1785 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1786 else
1787 tx_last_beacon = 1;
1788
1789#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB
1790 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1791 " (tx_last_beacon=%d)\n",
1792 sdata->dev->name, mgmt->sa, mgmt->da,
1793 mgmt->bssid, tx_last_beacon);
f0706e82
JB
1794#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1795
1796 if (!tx_last_beacon)
1797 return;
1798
1799 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1800 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1801 return;
1802
1803 end = ((u8 *) mgmt) + len;
1804 pos = mgmt->u.probe_req.variable;
1805 if (pos[0] != WLAN_EID_SSID ||
1806 pos + 2 + pos[1] > end) {
f4ea83dd
JB
1807#ifdef CONFIG_MAC80211_IBSS_DEBUG
1808 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0c68ae26
JB
1809 "from %pM\n",
1810 sdata->dev->name, mgmt->sa);
f4ea83dd 1811#endif
f0706e82
JB
1812 return;
1813 }
1814 if (pos[1] != 0 &&
1815 (pos[1] != ifsta->ssid_len ||
1816 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1817 /* Ignore ProbeReq for foreign SSID */
1818 return;
1819 }
1820
1821 /* Reply with ProbeResp */
0ec0b7ac 1822 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB
1823 if (!skb)
1824 return;
1825
1826 resp = (struct ieee80211_mgmt *) skb->data;
1827 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1828#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB
1829 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1830 sdata->dev->name, resp->da);
f0706e82 1831#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 1832 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB
1833}
1834
f698d856 1835void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB
1836 struct ieee80211_rx_status *rx_status)
1837{
f698d856 1838 struct ieee80211_local *local = sdata->local;
f0706e82
JB
1839 struct ieee80211_if_sta *ifsta;
1840 struct ieee80211_mgmt *mgmt;
1841 u16 fc;
1842
1843 if (skb->len < 24)
1844 goto fail;
1845
f0706e82
JB
1846 ifsta = &sdata->u.sta;
1847
1848 mgmt = (struct ieee80211_mgmt *) skb->data;
1849 fc = le16_to_cpu(mgmt->frame_control);
1850
1851 switch (fc & IEEE80211_FCTL_STYPE) {
1852 case IEEE80211_STYPE_PROBE_REQ:
1853 case IEEE80211_STYPE_PROBE_RESP:
1854 case IEEE80211_STYPE_BEACON:
1855 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1856 case IEEE80211_STYPE_AUTH:
1857 case IEEE80211_STYPE_ASSOC_RESP:
1858 case IEEE80211_STYPE_REASSOC_RESP:
1859 case IEEE80211_STYPE_DEAUTH:
1860 case IEEE80211_STYPE_DISASSOC:
1861 skb_queue_tail(&ifsta->skb_queue, skb);
1862 queue_work(local->hw.workqueue, &ifsta->work);
1863 return;
f0706e82
JB
1864 }
1865
1866 fail:
1867 kfree_skb(skb);
1868}
1869
f698d856 1870static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1871 struct sk_buff *skb)
1872{
1873 struct ieee80211_rx_status *rx_status;
f0706e82
JB
1874 struct ieee80211_if_sta *ifsta;
1875 struct ieee80211_mgmt *mgmt;
1876 u16 fc;
1877
f0706e82
JB
1878 ifsta = &sdata->u.sta;
1879
1880 rx_status = (struct ieee80211_rx_status *) skb->cb;
1881 mgmt = (struct ieee80211_mgmt *) skb->data;
1882 fc = le16_to_cpu(mgmt->frame_control);
1883
1884 switch (fc & IEEE80211_FCTL_STYPE) {
1885 case IEEE80211_STYPE_PROBE_REQ:
f698d856 1886 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB
1887 rx_status);
1888 break;
1889 case IEEE80211_STYPE_PROBE_RESP:
f698d856 1890 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB
1891 break;
1892 case IEEE80211_STYPE_BEACON:
f698d856 1893 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB
1894 break;
1895 case IEEE80211_STYPE_AUTH:
f698d856 1896 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB
1897 break;
1898 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 1899 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB
1900 break;
1901 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 1902 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB
1903 break;
1904 case IEEE80211_STYPE_DEAUTH:
f698d856 1905 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB
1906 break;
1907 case IEEE80211_STYPE_DISASSOC:
f698d856 1908 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB
1909 break;
1910 }
1911
1912 kfree_skb(skb);
1913}
1914
1915
f698d856 1916static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 1917{
f698d856 1918 struct ieee80211_local *local = sdata->local;
f0706e82
JB
1919 int active = 0;
1920 struct sta_info *sta;
1921
d0709a65
JB
1922 rcu_read_lock();
1923
1924 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1925 if (sta->sdata == sdata &&
f0706e82
JB
1926 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1927 jiffies)) {
1928 active++;
1929 break;
1930 }
1931 }
d0709a65
JB
1932
1933 rcu_read_unlock();
f0706e82
JB
1934
1935 return active;
1936}
1937
1938
f698d856 1939static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1940 struct ieee80211_if_sta *ifsta)
1941{
1942 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1943
f698d856
JBG
1944 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1945 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB
1946 return;
1947
1948 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 1949 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
c2b13452 1950 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB
1951}
1952
1953
9c6bd790 1954static void ieee80211_sta_timer(unsigned long data)
f0706e82 1955{
60f8b39c
JB
1956 struct ieee80211_sub_if_data *sdata =
1957 (struct ieee80211_sub_if_data *) data;
1958 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1959 struct ieee80211_local *local = sdata->local;
f0706e82 1960
60f8b39c
JB
1961 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1962 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB
1963}
1964
f698d856 1965static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
1966 struct ieee80211_if_sta *ifsta)
1967{
f698d856 1968 struct ieee80211_local *local = sdata->local;
f0706e82
JB
1969
1970 if (local->ops->reset_tsf) {
1971 /* Reset own TSF to allow time synchronization work. */
1972 local->ops->reset_tsf(local_to_hw(local));
1973 }
1974
1975 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1976
1977
1978 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1979 ifsta->auth_alg = WLAN_AUTH_OPEN;
1980 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1981 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1982 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1983 ifsta->auth_alg = WLAN_AUTH_LEAP;
1984 else
1985 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 1986 ifsta->auth_transaction = -1;
d6f2da5b 1987 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 1988 ifsta->assoc_scan_tries = 0;
9859b81e 1989 ifsta->direct_probe_tries = 0;
6042a3e3
RR
1990 ifsta->auth_tries = 0;
1991 ifsta->assoc_tries = 0;
24e64622 1992 netif_tx_stop_all_queues(sdata->dev);
f698d856 1993 netif_carrier_off(sdata->dev);
f0706e82
JB
1994}
1995
1996
f0706e82
JB
1997static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1998 const char *ssid, int ssid_len)
1999{
2000 int tmp, hidden_ssid;
2001
48225709
MW
2002 if (ssid_len == ifsta->ssid_len &&
2003 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB
2004 return 1;
2005
d6f2da5b 2006 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB
2007 return 0;
2008
2009 hidden_ssid = 1;
2010 tmp = ssid_len;
2011 while (tmp--) {
2012 if (ssid[tmp] != '\0') {
2013 hidden_ssid = 0;
2014 break;
2015 }
2016 }
2017
cb3da8cc 2018 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
f0706e82
JB
2019 return 1;
2020
2021 if (ssid_len == 1 && ssid[0] == ' ')
2022 return 1;
2023
2024 return 0;
2025}
2026
f698d856 2027static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
2028 struct ieee80211_if_sta *ifsta)
2029{
f698d856 2030 struct ieee80211_local *local = sdata->local;
c2b13452 2031 struct ieee80211_bss *bss;
8318d78a 2032 struct ieee80211_supported_band *sband;
f0706e82
JB
2033 u8 bssid[ETH_ALEN], *pos;
2034 int i;
167ad6f7 2035 int ret;
f0706e82
JB
2036
2037#if 0
2038 /* Easier testing, use fixed BSSID. */
2039 memset(bssid, 0xfe, ETH_ALEN);
2040#else
2041 /* Generate random, not broadcast, locally administered BSSID. Mix in
2042 * own MAC address to make sure that devices that do not have proper
2043 * random number generator get different BSSID. */
2044 get_random_bytes(bssid, ETH_ALEN);
2045 for (i = 0; i < ETH_ALEN; i++)
f698d856 2046 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB
2047 bssid[0] &= ~0x01;
2048 bssid[0] |= 0x02;
2049#endif
2050
0c68ae26
JB
2051 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2052 sdata->dev->name, bssid);
f0706e82 2053
98c8fccf 2054 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2055 local->hw.conf.channel->center_freq,
cffdd30d 2056 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB
2057 if (!bss)
2058 return -ENOMEM;
2059
8318d78a
JB
2060 bss->band = local->hw.conf.channel->band;
2061 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB
2062
2063 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2064 local->hw.conf.beacon_int = 100;
f0706e82 2065 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB
2066 bss->last_update = jiffies;
2067 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB
2068
2069 if (sdata->default_key)
f0706e82 2070 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2071 else
f0706e82 2072 sdata->drop_unencrypted = 0;
988c0f72 2073
8318d78a 2074 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2075 pos = bss->supp_rates;
8318d78a
JB
2076 for (i = 0; i < sband->n_bitrates; i++) {
2077 int rate = sband->bitrates[i].bitrate;
f0706e82
JB
2078 *pos++ = (u8) (rate / 5);
2079 }
2080
f698d856 2081 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2082 ieee80211_rx_bss_put(local, bss);
167ad6f7 2083 return ret;
f0706e82
JB
2084}
2085
2086
f698d856 2087static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB
2088 struct ieee80211_if_sta *ifsta)
2089{
f698d856 2090 struct ieee80211_local *local = sdata->local;
c2b13452 2091 struct ieee80211_bss *bss;
f0706e82
JB
2092 int found = 0;
2093 u8 bssid[ETH_ALEN];
2094 int active_ibss;
2095
2096 if (ifsta->ssid_len == 0)
2097 return -EINVAL;
2098
f698d856 2099 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB
2100#ifdef CONFIG_MAC80211_IBSS_DEBUG
2101 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2102 sdata->dev->name, active_ibss);
f0706e82 2103#endif /* CONFIG_MAC80211_IBSS_DEBUG */
c2b13452
JB
2104 spin_lock_bh(&local->bss_lock);
2105 list_for_each_entry(bss, &local->bss_list, list) {
f0706e82
JB
2106 if (ifsta->ssid_len != bss->ssid_len ||
2107 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2108 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2109 continue;
2110#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26 2111 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
f0706e82
JB
2112#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2113 memcpy(bssid, bss->bssid, ETH_ALEN);
2114 found = 1;
2115 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2116 break;
2117 }
c2b13452 2118 spin_unlock_bh(&local->bss_lock);
f0706e82
JB
2119
2120#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b 2121 if (found)
0c68ae26
JB
2122 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2123 "%pM\n", bssid, ifsta->bssid);
f0706e82 2124#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD
2125
2126 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 2127 int ret;
80693ceb
DD
2128 int search_freq;
2129
2130 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2131 search_freq = bss->freq;
2132 else
2133 search_freq = local->hw.conf.channel->center_freq;
2134
f698d856 2135 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD
2136 ifsta->ssid, ifsta->ssid_len);
2137 if (!bss)
2138 goto dont_join;
2139
0c68ae26 2140 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
f0706e82 2141 " based on configured SSID\n",
0c68ae26 2142 sdata->dev->name, bssid);
f698d856 2143 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2144 ieee80211_rx_bss_put(local, bss);
167ad6f7 2145 return ret;
f0706e82 2146 }
80693ceb
DD
2147
2148dont_join:
f0706e82
JB
2149#ifdef CONFIG_MAC80211_IBSS_DEBUG
2150 printk(KERN_DEBUG " did not try to join ibss\n");
2151#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2152
2153 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2154 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2155 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB
2156 mod_timer(&ifsta->timer, jiffies +
2157 IEEE80211_IBSS_MERGE_INTERVAL);
2158 } else if (time_after(jiffies, local->last_scan_completed +
2159 IEEE80211_SCAN_INTERVAL)) {
2160 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2161 "join\n", sdata->dev->name);
c2b13452 2162 return ieee80211_request_scan(sdata, ifsta->ssid,
f0706e82 2163 ifsta->ssid_len);
48c2fc59 2164 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB
2165 int interval = IEEE80211_SCAN_INTERVAL;
2166
2167 if (time_after(jiffies, ifsta->ibss_join_req +
2168 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2169 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB
2170 (!(local->oper_channel->flags &
2171 IEEE80211_CHAN_NO_IBSS)))
f698d856 2172 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2173 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2174 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2175 " %d MHz\n", sdata->dev->name,
8318d78a 2176 local->hw.conf.channel->center_freq);
f0706e82
JB
2177 }
2178
2179 /* No IBSS found - decrease scan interval and continue
2180 * scanning. */
2181 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2182 }
2183
48c2fc59 2184 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB
2185 mod_timer(&ifsta->timer, jiffies + interval);
2186 return 0;
2187 }
2188
2189 return 0;
2190}
2191
2192
9c6bd790
JB
2193static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2194 struct ieee80211_if_sta *ifsta)
f0706e82 2195{
9c6bd790 2196 struct ieee80211_local *local = sdata->local;
c2b13452 2197 struct ieee80211_bss *bss, *selected = NULL;
9c6bd790 2198 int top_rssi = 0, freq;
f0706e82 2199
c2b13452 2200 spin_lock_bh(&local->bss_lock);
9c6bd790 2201 freq = local->oper_channel->center_freq;
c2b13452 2202 list_for_each_entry(bss, &local->bss_list, list) {
9c6bd790
JB
2203 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2204 continue;
f0706e82 2205
9c6bd790
JB
2206 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2207 IEEE80211_STA_AUTO_BSSID_SEL |
2208 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2209 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2210 !!sdata->default_key))
2211 continue;
f0706e82 2212
9c6bd790
JB
2213 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2214 bss->freq != freq)
2215 continue;
9d139c81 2216
9c6bd790
JB
2217 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2218 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2219 continue;
f0706e82 2220
9c6bd790
JB
2221 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2222 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2223 continue;
9d139c81 2224
9c6bd790
JB
2225 if (!selected || top_rssi < bss->signal) {
2226 selected = bss;
2227 top_rssi = bss->signal;
2228 }
f0706e82 2229 }
9c6bd790
JB
2230 if (selected)
2231 atomic_inc(&selected->users);
c2b13452 2232 spin_unlock_bh(&local->bss_lock);
9d139c81 2233
9c6bd790
JB
2234 if (selected) {
2235 ieee80211_set_freq(sdata, selected->freq);
2236 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2237 ieee80211_sta_set_ssid(sdata, selected->ssid,
2238 selected->ssid_len);
2239 ieee80211_sta_set_bssid(sdata, selected->bssid);
2240 ieee80211_sta_def_wmm_params(sdata, selected);
f0706e82 2241
9c6bd790
JB
2242 /* Send out direct probe if no probe resp was received or
2243 * the one we have is outdated
2244 */
2245 if (!selected->last_probe_resp ||
2246 time_after(jiffies, selected->last_probe_resp
2247 + IEEE80211_SCAN_RESULT_EXPIRE))
2248 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2249 else
2250 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2251
9c6bd790
JB
2252 ieee80211_rx_bss_put(local, selected);
2253 ieee80211_sta_reset_auth(sdata, ifsta);
2254 return 0;
2255 } else {
2256 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2257 ifsta->assoc_scan_tries++;
2258 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
c2b13452 2259 ieee80211_start_scan(sdata, NULL, 0);
9c6bd790 2260 else
c2b13452 2261 ieee80211_start_scan(sdata, ifsta->ssid,
9c6bd790
JB
2262 ifsta->ssid_len);
2263 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2264 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2265 } else
2266 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2267 }
2268 return -1;
2269}
2270
2271
2272static void ieee80211_sta_work(struct work_struct *work)
2273{
2274 struct ieee80211_sub_if_data *sdata =
2275 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2276 struct ieee80211_local *local = sdata->local;
2277 struct ieee80211_if_sta *ifsta;
2278 struct sk_buff *skb;
2279
2280 if (!netif_running(sdata->dev))
2281 return;
2282
c2b13452 2283 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB
2284 return;
2285
05c914fe
JB
2286 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2287 sdata->vif.type != NL80211_IFTYPE_ADHOC))
9c6bd790 2288 return;
f0706e82
JB
2289 ifsta = &sdata->u.sta;
2290
9c6bd790
JB
2291 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2292 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2293
2294 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2295 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2296 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2297 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
c2b13452
JB
2298 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2299 ifsta->scan_ssid_len);
9c6bd790 2300 return;
f0706e82
JB
2301 }
2302
9c6bd790
JB
2303 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2304 if (ieee80211_sta_config_auth(sdata, ifsta))
2305 return;
2306 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2307 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2308 return;
d6f2da5b 2309
9c6bd790
JB
2310 switch (ifsta->state) {
2311 case IEEE80211_STA_MLME_DISABLED:
2312 break;
2313 case IEEE80211_STA_MLME_DIRECT_PROBE:
2314 ieee80211_direct_probe(sdata, ifsta);
2315 break;
2316 case IEEE80211_STA_MLME_AUTHENTICATE:
2317 ieee80211_authenticate(sdata, ifsta);
2318 break;
2319 case IEEE80211_STA_MLME_ASSOCIATE:
2320 ieee80211_associate(sdata, ifsta);
2321 break;
2322 case IEEE80211_STA_MLME_ASSOCIATED:
2323 ieee80211_associated(sdata, ifsta);
2324 break;
2325 case IEEE80211_STA_MLME_IBSS_SEARCH:
2326 ieee80211_sta_find_ibss(sdata, ifsta);
2327 break;
2328 case IEEE80211_STA_MLME_IBSS_JOINED:
2329 ieee80211_sta_merge_ibss(sdata, ifsta);
2330 break;
2331 default:
2332 WARN_ON(1);
2333 break;
2334 }
2335
2336 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2337 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2338 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2339
2340 ieee80211_set_disassoc(sdata, ifsta, false, true,
2341 WLAN_REASON_UNSPECIFIED);
2342 }
f0706e82
JB
2343}
2344
9c6bd790
JB
2345static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2346{
05c914fe 2347 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790
JB
2348 queue_work(sdata->local->hw.workqueue,
2349 &sdata->u.sta.work);
2350}
f0706e82 2351
9c6bd790
JB
2352/* interface setup */
2353void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2354{
9c6bd790 2355 struct ieee80211_if_sta *ifsta;
988c0f72 2356
9c6bd790
JB
2357 ifsta = &sdata->u.sta;
2358 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2359 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2360 (unsigned long) sdata);
2361 skb_queue_head_init(&ifsta->skb_queue);
2362
2363 ifsta->capab = WLAN_CAPABILITY_ESS;
2364 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2365 IEEE80211_AUTH_ALG_SHARED_KEY;
2366 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2367 IEEE80211_STA_AUTO_BSSID_SEL |
2368 IEEE80211_STA_AUTO_CHANNEL_SEL;
2369 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2370 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB
2371}
2372
9c6bd790
JB
2373/*
2374 * Add a new IBSS station, will also be called by the RX code when,
2375 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2376 * must be callable in atomic context.
2377 */
f698d856 2378struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
ab1f5c0b 2379 u8 *bssid,u8 *addr, u64 supp_rates)
f0706e82 2380{
f698d856 2381 struct ieee80211_local *local = sdata->local;
f0706e82 2382 struct sta_info *sta;
87291c02 2383 int band = local->hw.conf.channel->band;
f0706e82
JB
2384
2385 /* TODO: Could consider removing the least recently used entry and
2386 * allow new one to be added. */
2387 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2388 if (net_ratelimit()) {
2389 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0c68ae26 2390 "entry %pM\n", sdata->dev->name, addr);
f0706e82
JB
2391 }
2392 return NULL;
2393 }
2394
1e188637 2395 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK
2396 return NULL;
2397
f4ea83dd 2398#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0c68ae26
JB
2399 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2400 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
f4ea83dd 2401#endif
f0706e82 2402
73651ee6
JB
2403 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2404 if (!sta)
f0706e82
JB
2405 return NULL;
2406
07346f81 2407 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2408
8e1535d5 2409 /* make sure mandatory rates are always added */
323ce79a 2410 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 2411 ieee80211_mandatory_rates(local, band);
f0706e82 2412
4b7679a5 2413 rate_control_rate_init(sta);
f0706e82 2414
93e5deb1 2415 if (sta_info_insert(sta))
73651ee6 2416 return NULL;
73651ee6 2417
d0709a65 2418 return sta;
f0706e82
JB
2419}
2420
9c6bd790
JB
2421/* configuration hooks */
2422void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2423 struct ieee80211_if_sta *ifsta)
60f8b39c
JB
2424{
2425 struct ieee80211_local *local = sdata->local;
60f8b39c 2426
05c914fe 2427 if (sdata->vif.type != NL80211_IFTYPE_STATION)
9c6bd790 2428 return;
60f8b39c 2429
9c6bd790
JB
2430 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2431 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2432 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2433 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2434
9c6bd790
JB
2435 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2436 ieee80211_set_disassoc(sdata, ifsta, true, true,
2437 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2438
9c6bd790
JB
2439 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2440 queue_work(local->hw.workqueue, &ifsta->work);
2441 }
2442}
60f8b39c 2443
9c6bd790
JB
2444int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2445{
2446 struct ieee80211_if_sta *ifsta;
60f8b39c 2447
9c6bd790
JB
2448 if (len > IEEE80211_MAX_SSID_LEN)
2449 return -EINVAL;
2450
2451 ifsta = &sdata->u.sta;
2452
2453 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2454 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2455 memcpy(ifsta->ssid, ssid, len);
2456 ifsta->ssid_len = len;
2457 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
60f8b39c 2458 }
60f8b39c 2459
9c6bd790
JB
2460 if (len)
2461 ifsta->flags |= IEEE80211_STA_SSID_SET;
2462 else
2463 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2464
05c914fe 2465 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
9c6bd790
JB
2466 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2467 ifsta->ibss_join_req = jiffies;
2468 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2469 return ieee80211_sta_find_ibss(sdata, ifsta);
2470 }
2471
2472 return 0;
2473}
2474
2475int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2476{
2477 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2478 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2479 *len = ifsta->ssid_len;
2480 return 0;
2481}
2482
2483int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2484{
2485 struct ieee80211_if_sta *ifsta;
2486 int res;
2487
2488 ifsta = &sdata->u.sta;
2489
2490 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2491 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2492 res = 0;
2493 /*
2494 * Hack! See also ieee80211_sta_set_ssid.
60f8b39c 2495 */
9c6bd790
JB
2496 if (netif_running(sdata->dev))
2497 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2498 if (res) {
2499 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2500 "the low-level driver\n", sdata->dev->name);
2501 return res;
2502 }
2503 }
60f8b39c 2504
9c6bd790
JB
2505 if (is_valid_ether_addr(bssid))
2506 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2507 else
2508 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2509
2510 return 0;
2511}
2512
2513int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2514{
2515 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2516
2517 kfree(ifsta->extra_ie);
2518 if (len == 0) {
2519 ifsta->extra_ie = NULL;
2520 ifsta->extra_ie_len = 0;
60f8b39c 2521 return 0;
60f8b39c 2522 }
9c6bd790
JB
2523 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2524 if (!ifsta->extra_ie) {
2525 ifsta->extra_ie_len = 0;
2526 return -ENOMEM;
2527 }
2528 memcpy(ifsta->extra_ie, ie, len);
2529 ifsta->extra_ie_len = len;
2530 return 0;
60f8b39c
JB
2531}
2532
f698d856 2533int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2534{
f0706e82
JB
2535 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2536
f4ea83dd 2537 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2538 sdata->dev->name, reason);
f0706e82 2539
05c914fe
JB
2540 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2541 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82
JB
2542 return -EINVAL;
2543
aa458d17 2544 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB
2545 return 0;
2546}
2547
f698d856 2548int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2549{
f0706e82
JB
2550 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2551
f4ea83dd 2552 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2553 sdata->dev->name, reason);
f0706e82 2554
05c914fe 2555 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB
2556 return -EINVAL;
2557
d6f2da5b 2558 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB
2559 return -1;
2560
aa458d17 2561 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB
2562 return 0;
2563}
84363e6e 2564
9c6bd790
JB
2565/* scan finished notification */
2566void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2567{
2568 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2569 struct ieee80211_if_sta *ifsta;
2570
05c914fe 2571 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB
2572 ifsta = &sdata->u.sta;
2573 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2574 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2575 !ieee80211_sta_active_ibss(sdata)))
2576 ieee80211_sta_find_ibss(sdata, ifsta);
2577 }
2578
2579 /* Restart STA timers */
2580 rcu_read_lock();
2581 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2582 ieee80211_restart_sta_timer(sdata);
2583 rcu_read_unlock();
2584}