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mac80211: track master queue status
[deliverable/linux.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
e0cb686f
KV		 747 if (local->powersave) {
748 local->hw.conf.flags |= IEEE80211_CONF_PS;
749 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
750 }
751
9ac19a90
JB		 752 netif_tx_start_all_queues(sdata->dev);
753 netif_carrier_on(sdata->dev);
f0706e82 754
9ac19a90 755 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 756}
757
9ac19a90
JB		 758static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
759 struct ieee80211_if_sta *ifsta)
f0706e82 760{
9ac19a90
JB		 761 ifsta->direct_probe_tries++;
762 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26
JB		 763 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
764 sdata->dev->name, ifsta->bssid);
9ac19a90 765 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 766 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 767 return;
768 }
f0706e82 769
0c68ae26
JB		 770 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
771 sdata->dev->name, ifsta->bssid,
9ac19a90 772 ifsta->direct_probe_tries);
f0706e82 773
9ac19a90 774 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 775
9ac19a90
JB		 776 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
777
778 /* Direct probe is sent to broadcast address as some APs
779 * will not answer to direct packet in unassociated state.
780 */
781 ieee80211_send_probe_req(sdata, NULL,
782 ifsta->ssid, ifsta->ssid_len);
783
784 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 785}
f0706e82 786
9ac19a90
JB		 787
788static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
789 struct ieee80211_if_sta *ifsta)
f0706e82 790{
9ac19a90
JB		 791 ifsta->auth_tries++;
792 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 793 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 794 " timed out\n",
0c68ae26 795 sdata->dev->name, ifsta->bssid);
9ac19a90 796 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 797 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 798 return;
799 }
f0706e82 800
9ac19a90 801 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26
JB		 802 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
803 sdata->dev->name, ifsta->bssid);
f0706e82 804
9ac19a90
JB		 805 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
806
807 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 808}
809
5925d976
VN		 810/*
811 * The disassoc 'reason' argument can be either our own reason
812 * if self disconnected or a reason code from the AP.
813 */
aa458d17
TW		 814static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
815 struct ieee80211_if_sta *ifsta, bool deauth,
816 bool self_disconnected, u16 reason)
817{
818 struct ieee80211_local *local = sdata->local;
819 struct sta_info *sta;
e0cb686f 820 u32 changed = 0, config_changed = 0;
aa458d17
TW		 821
822 rcu_read_lock();
823
824 sta = sta_info_get(local, ifsta->bssid);
825 if (!sta) {
826 rcu_read_unlock();
827 return;
828 }
829
830 if (deauth) {
831 ifsta->direct_probe_tries = 0;
832 ifsta->auth_tries = 0;
833 }
834 ifsta->assoc_scan_tries = 0;
835 ifsta->assoc_tries = 0;
836
24e64622 837 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 838 netif_carrier_off(sdata->dev);
839
17741cdc 840 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
aa458d17
TW		 841
842 if (self_disconnected) {
843 if (deauth)
ef422bc0
JB		 844 ieee80211_send_deauth_disassoc(sdata,
845 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 846 else
ef422bc0
JB		 847 ieee80211_send_deauth_disassoc(sdata,
848 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 849 }
850
f5e5bf25
TW		 851 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
852 changed |= ieee80211_reset_erp_info(sdata);
853
f5e5bf25 854 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 855 changed |= BSS_CHANGED_ASSOC;
856 sdata->vif.bss_conf.assoc = false;
f5e5bf25
TW		 857
858 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17 859
5925d976 860 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
aa458d17
TW		 861 ifsta->state = IEEE80211_STA_MLME_DISABLED;
862
aa458d17
TW		 863 rcu_read_unlock();
864
ae5eb026 865 local->hw.conf.ht.enabled = false;
094d05dc 866 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f
KV		 867 config_changed |= IEEE80211_CONF_CHANGE_HT;
868
869 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
870 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
871 config_changed |= IEEE80211_CONF_CHANGE_PS;
872 }
ae5eb026 873
e0cb686f 874 ieee80211_hw_config(local, config_changed);
ae5eb026 875 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 876
877 rcu_read_lock();
878
879 sta = sta_info_get(local, ifsta->bssid);
880 if (!sta) {
881 rcu_read_unlock();
882 return;
883 }
884
885 sta_info_unlink(&sta);
886
887 rcu_read_unlock();
888
889 sta_info_destroy(sta);
aa458d17 890}
f0706e82 891
9ac19a90
JB		 892static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
893{
894 if (!sdata || !sdata->default_key ||
895 sdata->default_key->conf.alg != ALG_WEP)
896 return 0;
897 return 1;
898}
899
f698d856 900static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 901 struct ieee80211_if_sta *ifsta)
902{
f698d856 903 struct ieee80211_local *local = sdata->local;
c2b13452 904 struct ieee80211_bss *bss;
5b98b1f7
JB		 905 int bss_privacy;
906 int wep_privacy;
907 int privacy_invoked;
f0706e82 908
5b98b1f7 909 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 910 return 0;
911
f698d856 912 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 913 local->hw.conf.channel->center_freq,
cffdd30d 914 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 915 if (!bss)
916 return 0;
917
5b98b1f7 918 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 919 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 920 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 921
3e122be0 922 ieee80211_rx_bss_put(local, bss);
f0706e82 923
5b98b1f7
JB		 924 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
925 return 0;
926
927 return 1;
f0706e82
JB		 928}
929
f698d856 930static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 931 struct ieee80211_if_sta *ifsta)
932{
933 ifsta->assoc_tries++;
934 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 935 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 936 " timed out\n",
0c68ae26 937 sdata->dev->name, ifsta->bssid);
48c2fc59 938 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 939 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 940 return;
941 }
942
48c2fc59 943 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26
JB		 944 printk(KERN_DEBUG "%s: associate with AP %pM\n",
945 sdata->dev->name, ifsta->bssid);
f698d856 946 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 947 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 948 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 949 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 950 return;
951 }
952
f698d856 953 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 954
955 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
956}
957
958
f698d856 959static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 960 struct ieee80211_if_sta *ifsta)
961{
f698d856 962 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 963 struct sta_info *sta;
964 int disassoc;
965
966 /* TODO: start monitoring current AP signal quality and number of
967 * missed beacons. Scan other channels every now and then and search
968 * for better APs. */
969 /* TODO: remove expired BSSes */
970
48c2fc59 971 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 972
d0709a65
JB		 973 rcu_read_lock();
974
f0706e82
JB		 975 sta = sta_info_get(local, ifsta->bssid);
976 if (!sta) {
0c68ae26
JB		 977 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
978 sdata->dev->name, ifsta->bssid);
f0706e82
JB		 979 disassoc = 1;
980 } else {
981 disassoc = 0;
982 if (time_after(jiffies,
983 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 984 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 985 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 986 "current AP %pM - assume out of "
f0706e82 987 "range\n",
0c68ae26 988 sdata->dev->name, ifsta->bssid);
f0706e82 989 disassoc = 1;
d6f2da5b 990 } else
f698d856 991 ieee80211_send_probe_req(sdata, ifsta->bssid,
4dfe51e1
JB		 992 ifsta->ssid,
993 ifsta->ssid_len);
d6f2da5b 994 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 995 } else {
d6f2da5b 996 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 997 if (time_after(jiffies, ifsta->last_probe +
998 IEEE80211_PROBE_INTERVAL)) {
999 ifsta->last_probe = jiffies;
f698d856 1000 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1001 ifsta->ssid,
1002 ifsta->ssid_len);
1003 }
1004 }
f0706e82 1005 }
d0709a65
JB		 1006
1007 rcu_read_unlock();
1008
60f8b39c
JB		 1009 if (disassoc)
1010 ieee80211_set_disassoc(sdata, ifsta, true, true,
1011 WLAN_REASON_PREV_AUTH_NOT_VALID);
1012 else
1013 mod_timer(&ifsta->timer, jiffies +
1014 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 1015}
1016
1017
f698d856 1018static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1019 struct ieee80211_if_sta *ifsta)
1020{
f698d856 1021 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1022 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1023 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1024}
1025
1026
f698d856 1027static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1028 struct ieee80211_if_sta *ifsta,
1029 struct ieee80211_mgmt *mgmt,
1030 size_t len)
1031{
1032 u8 *pos;
1033 struct ieee802_11_elems elems;
1034
f0706e82 1035 pos = mgmt->u.auth.variable;
67a4cce4 1036 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1037 if (!elems.challenge)
f0706e82 1038 return;
f698d856 1039 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1040 elems.challenge_len + 2, 1);
1041}
1042
f698d856 1043static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1044 struct ieee80211_if_sta *ifsta,
1045 struct ieee80211_mgmt *mgmt,
1046 size_t len)
1047{
f0706e82
JB		 1048 u16 auth_alg, auth_transaction, status_code;
1049
48c2fc59 1050 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
05c914fe 1051 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82 1052 return;
f0706e82 1053
f4ea83dd 1054 if (len < 24 + 6)
f0706e82 1055 return;
f0706e82 1056
05c914fe 1057 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1058 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1059 return;
f0706e82 1060
05c914fe 1061 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1062 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1063 return;
f0706e82
JB		 1064
1065 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1066 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1067 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1068
05c914fe 1069 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
135a2110
JB		 1070 /*
1071 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1072 * networks and most implementations do not seem to use it.
1073 * However, try to reply to authentication attempts if someone
1074 * has actually implemented this.
135a2110 1075 */
f4ea83dd 1076 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1077 return;
f698d856 1078 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1079 }
1080
1081 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1082 auth_transaction != ifsta->auth_transaction)
f0706e82 1083 return;
f0706e82
JB		 1084
1085 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1086 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1087 u8 algs[3];
1088 const int num_algs = ARRAY_SIZE(algs);
1089 int i, pos;
1090 algs[0] = algs[1] = algs[2] = 0xff;
1091 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1092 algs[0] = WLAN_AUTH_OPEN;
1093 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1094 algs[1] = WLAN_AUTH_SHARED_KEY;
1095 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1096 algs[2] = WLAN_AUTH_LEAP;
1097 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1098 pos = 0;
1099 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1100 pos = 1;
1101 else
1102 pos = 2;
1103 for (i = 0; i < num_algs; i++) {
1104 pos++;
1105 if (pos >= num_algs)
1106 pos = 0;
1107 if (algs[pos] == ifsta->auth_alg ||
1108 algs[pos] == 0xff)
1109 continue;
1110 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1111 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1112 continue;
1113 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1114 break;
1115 }
1116 }
1117 return;
1118 }
1119
1120 switch (ifsta->auth_alg) {
1121 case WLAN_AUTH_OPEN:
1122 case WLAN_AUTH_LEAP:
f698d856 1123 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1124 break;
1125 case WLAN_AUTH_SHARED_KEY:
1126 if (ifsta->auth_transaction == 4)
f698d856 1127 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1128 else
f698d856 1129 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1130 break;
1131 }
1132}
1133
1134
f698d856 1135static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1136 struct ieee80211_if_sta *ifsta,
1137 struct ieee80211_mgmt *mgmt,
1138 size_t len)
1139{
1140 u16 reason_code;
1141
f4ea83dd 1142 if (len < 24 + 2)
f0706e82 1143 return;
f0706e82 1144
f4ea83dd 1145 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1146 return;
f0706e82
JB		 1147
1148 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1149
988c0f72 1150 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1151 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1152 sdata->dev->name, reason_code);
f0706e82 1153
48c2fc59
TW		 1154 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1155 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1156 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1157 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1158 mod_timer(&ifsta->timer, jiffies +
1159 IEEE80211_RETRY_AUTH_INTERVAL);
1160 }
1161
aa458d17 1162 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1163 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1164}
1165
1166
f698d856 1167static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1168 struct ieee80211_if_sta *ifsta,
1169 struct ieee80211_mgmt *mgmt,
1170 size_t len)
1171{
1172 u16 reason_code;
1173
f4ea83dd 1174 if (len < 24 + 2)
f0706e82 1175 return;
f0706e82 1176
f4ea83dd 1177 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1178 return;
f0706e82
JB		 1179
1180 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1181
d6f2da5b 1182 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1183 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1184 sdata->dev->name, reason_code);
f0706e82 1185
48c2fc59
TW		 1186 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1187 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1188 mod_timer(&ifsta->timer, jiffies +
1189 IEEE80211_RETRY_AUTH_INTERVAL);
1190 }
1191
5925d976 1192 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
f0706e82
JB		 1193}
1194
1195
471b3efd 1196static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1197 struct ieee80211_if_sta *ifsta,
1198 struct ieee80211_mgmt *mgmt,
1199 size_t len,
1200 int reassoc)
1201{
471b3efd 1202 struct ieee80211_local *local = sdata->local;
8318d78a 1203 struct ieee80211_supported_band *sband;
f0706e82 1204 struct sta_info *sta;
8318d78a 1205 u64 rates, basic_rates;
f0706e82
JB		 1206 u16 capab_info, status_code, aid;
1207 struct ieee802_11_elems elems;
bda3933a 1208 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1209 u8 *pos;
ae5eb026 1210 u32 changed = 0;
f0706e82 1211 int i, j;
ddf4ac53 1212 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1213 u16 ap_ht_cap_flags;
f0706e82
JB		 1214
1215 /* AssocResp and ReassocResp have identical structure, so process both
1216 * of them in this function. */
1217
48c2fc59 1218 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1219 return;
f0706e82 1220
f4ea83dd 1221 if (len < 24 + 6)
f0706e82 1222 return;
f0706e82 1223
f4ea83dd 1224 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1225 return;
f0706e82
JB		 1226
1227 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1228 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1229 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1230
0c68ae26 1231 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1232 "status=%d aid=%d)\n",
0c68ae26 1233 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1234 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1235
1236 if (status_code != WLAN_STATUS_SUCCESS) {
1237 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1238 sdata->dev->name, status_code);
8a69aa93
DD		 1239 /* if this was a reassociation, ensure we try a "full"
1240 * association next time. This works around some broken APs
1241 * which do not correctly reject reassociation requests. */
d6f2da5b 1242 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1243 return;
1244 }
1245
1dd84aa2
JB		 1246 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1247 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1248 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1249 aid &= ~(BIT(15) | BIT(14));
1250
f0706e82 1251 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1252 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1253
1254 if (!elems.supp_rates) {
1255 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1256 sdata->dev->name);
f0706e82
JB		 1257 return;
1258 }
1259
f698d856 1260 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1261 ifsta->aid = aid;
1262 ifsta->ap_capab = capab_info;
1263
1264 kfree(ifsta->assocresp_ies);
1265 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1266 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1267 if (ifsta->assocresp_ies)
1268 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1269
d0709a65
JB		 1270 rcu_read_lock();
1271
f0706e82
JB		 1272 /* Add STA entry for the AP */
1273 sta = sta_info_get(local, ifsta->bssid);
1274 if (!sta) {
c2b13452 1275 struct ieee80211_bss *bss;
ddf4ac53
JB		 1276
1277 newsta = true;
d0709a65 1278
73651ee6
JB		 1279 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1280 if (!sta) {
1281 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1282 " the AP\n", sdata->dev->name);
d0709a65 1283 rcu_read_unlock();
f0706e82
JB		 1284 return;
1285 }
60f8b39c
JB		 1286 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1287 local->hw.conf.channel->center_freq,
1288 ifsta->ssid, ifsta->ssid_len);
1289 if (bss) {
1290 sta->last_signal = bss->signal;
1291 sta->last_qual = bss->qual;
1292 sta->last_noise = bss->noise;
1293 ieee80211_rx_bss_put(local, bss);
1294 }
f709fc69 1295
60f8b39c
JB		 1296 /* update new sta with its last rx activity */
1297 sta->last_rx = jiffies;
f709fc69 1298 }
f709fc69 1299
60f8b39c
JB		 1300 /*
1301 * FIXME: Do we really need to update the sta_info's information here?
1302 * We already know about the AP (we found it in our list) so it
1303 * should already be filled with the right info, no?
1304 * As is stands, all this is racy because typically we assume
1305 * the information that is filled in here (except flags) doesn't
1306 * change while a STA structure is alive. As such, it should move
1307 * to between the sta_info_alloc() and sta_info_insert() above.
1308 */
f709fc69 1309
60f8b39c
JB		 1310 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1311 WLAN_STA_AUTHORIZED);
05e5e883 1312
60f8b39c
JB		 1313 rates = 0;
1314 basic_rates = 0;
1315 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1316
60f8b39c
JB		 1317 for (i = 0; i < elems.supp_rates_len; i++) {
1318 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1319 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1320
60f8b39c
JB		 1321 if (rate > 110)
1322 have_higher_than_11mbit = true;
1323
1324 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1325 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1326 rates |= BIT(j);
d61272cb
TW		 1327 if (is_basic)
1328 basic_rates |= BIT(j);
1329 break;
1330 }
f709fc69 1331 }
f709fc69
LCC		 1332 }
1333
60f8b39c
JB		 1334 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1335 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
d61272cb 1336 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f0706e82 1337
60f8b39c
JB		 1338 if (rate > 110)
1339 have_higher_than_11mbit = true;
f0706e82 1340
60f8b39c 1341 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1342 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1343 rates |= BIT(j);
d61272cb
TW		 1344 if (is_basic)
1345 basic_rates |= BIT(j);
1346 break;
1347 }
60f8b39c 1348 }
1ebebea8 1349 }
f0706e82 1350
323ce79a 1351 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1352 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1353
1354 /* cf. IEEE 802.11 9.2.12 */
1355 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1356 have_higher_than_11mbit)
1357 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1358 else
1359 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1360
ae5eb026
JB		 1361 if (elems.ht_cap_elem)
1362 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1363 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1364
1365 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1366
4b7679a5 1367 rate_control_rate_init(sta);
f0706e82 1368
ddf4ac53 1369 if (elems.wmm_param)
60f8b39c 1370 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1371
1372 if (newsta) {
1373 int err = sta_info_insert(sta);
1374 if (err) {
1375 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1376 " the AP (error %d)\n", sdata->dev->name, err);
1377 rcu_read_unlock();
1378 return;
1379 }
1380 }
1381
1382 rcu_read_unlock();
1383
1384 if (elems.wmm_param)
60f8b39c
JB		 1385 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1386 elems.wmm_param_len);
f0706e82 1387
ae5eb026
JB		 1388 if (elems.ht_info_elem && elems.wmm_param &&
1389 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1390 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1391 ap_ht_cap_flags);
1392
60f8b39c
JB		 1393 /* set AID and assoc capability,
1394 * ieee80211_set_associated() will tell the driver */
1395 bss_conf->aid = aid;
1396 bss_conf->assoc_capability = capab_info;
ae5eb026 1397 ieee80211_set_associated(sdata, ifsta, changed);
f0706e82 1398
60f8b39c 1399 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1400}
1401
1402
f698d856 1403static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a 1404 struct ieee80211_if_sta *ifsta,
c2b13452 1405 struct ieee80211_bss *bss)
a607268a 1406{
f698d856 1407 struct ieee80211_local *local = sdata->local;
a607268a
BR		 1408 int res, rates, i, j;
1409 struct sk_buff *skb;
1410 struct ieee80211_mgmt *mgmt;
a607268a 1411 u8 *pos;
a607268a 1412 struct ieee80211_supported_band *sband;
507b06d0 1413 union iwreq_data wrqu;
a607268a 1414
e2ef12d3
RR		 1415 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
1416 if (!skb) {
1417 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1418 "response\n", sdata->dev->name);
1419 return -ENOMEM;
1420 }
1421
a607268a
BR		 1422 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1423
1424 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1425 sta_info_flush_delayed(sdata);
a607268a
BR		 1426
1427 if (local->ops->reset_tsf) {
1428 /* Reset own TSF to allow time synchronization work. */
1429 local->ops->reset_tsf(local_to_hw(local));
1430 }
1431 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1432 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1433 if (res)
1434 return res;
1435
1436 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1437
a607268a
BR		 1438 sdata->drop_unencrypted = bss->capability &
1439 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1440
f698d856 1441 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1442
be038b37
AK		 1443 if (res)
1444 return res;
a607268a 1445
9d139c81 1446 /* Build IBSS probe response */
a607268a 1447
e2ef12d3 1448 skb_reserve(skb, local->hw.extra_tx_headroom);
a607268a 1449
e2ef12d3
RR		 1450 mgmt = (struct ieee80211_mgmt *)
1451 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1452 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1453 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1454 IEEE80211_STYPE_PROBE_RESP);
1455 memset(mgmt->da, 0xff, ETH_ALEN);
1456 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1457 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1458 mgmt->u.beacon.beacon_int =
1459 cpu_to_le16(local->hw.conf.beacon_int);
1460 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1461 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
a607268a 1462
e2ef12d3
RR		 1463 pos = skb_put(skb, 2 + ifsta->ssid_len);
1464 *pos++ = WLAN_EID_SSID;
1465 *pos++ = ifsta->ssid_len;
1466 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
a607268a 1467
e2ef12d3
RR		 1468 rates = bss->supp_rates_len;
1469 if (rates > 8)
1470 rates = 8;
1471 pos = skb_put(skb, 2 + rates);
1472 *pos++ = WLAN_EID_SUPP_RATES;
1473 *pos++ = rates;
1474 memcpy(pos, bss->supp_rates, rates);
1475
1476 if (bss->band == IEEE80211_BAND_2GHZ) {
1477 pos = skb_put(skb, 2 + 1);
1478 *pos++ = WLAN_EID_DS_PARAMS;
1479 *pos++ = 1;
1480 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1481 }
a607268a 1482
e2ef12d3
RR		 1483 pos = skb_put(skb, 2 + 2);
1484 *pos++ = WLAN_EID_IBSS_PARAMS;
1485 *pos++ = 2;
1486 /* FIX: set ATIM window based on scan results */
1487 *pos++ = 0;
1488 *pos++ = 0;
e039fa4a 1489
e2ef12d3
RR		 1490 if (bss->supp_rates_len > 8) {
1491 rates = bss->supp_rates_len - 8;
1492 pos = skb_put(skb, 2 + rates);
1493 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1494 *pos++ = rates;
1495 memcpy(pos, &bss->supp_rates[8], rates);
9d139c81 1496 }
a607268a 1497
e2ef12d3
RR		 1498 ifsta->probe_resp = skb;
1499
1500 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1501
1502
9d139c81
JB		 1503 rates = 0;
1504 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1505 for (i = 0; i < bss->supp_rates_len; i++) {
1506 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1507 for (j = 0; j < sband->n_bitrates; j++)
1508 if (sband->bitrates[j].bitrate == bitrate)
1509 rates |= BIT(j);
a607268a 1510 }
9d139c81
JB		 1511 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1512
b079ada7 1513 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1514
48c2fc59 1515 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1516 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1517
4492bea6
EG		 1518 ieee80211_led_assoc(local, true);
1519
507b06d0
DW		 1520 memset(&wrqu, 0, sizeof(wrqu));
1521 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1522 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1523
1524 return res;
1525}
1526
98c8fccf
JB		 1527static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1528 struct ieee80211_mgmt *mgmt,
1529 size_t len,
1530 struct ieee80211_rx_status *rx_status,
1531 struct ieee802_11_elems *elems,
1532 bool beacon)
1533{
1534 struct ieee80211_local *local = sdata->local;
1535 int freq;
c2b13452 1536 struct ieee80211_bss *bss;
98c8fccf
JB		 1537 struct sta_info *sta;
1538 struct ieee80211_channel *channel;
1539 u64 beacon_timestamp, rx_timestamp;
1540 u64 supp_rates = 0;
1541 enum ieee80211_band band = rx_status->band;
98c8fccf
JB		 1542
1543 if (elems->ds_params && elems->ds_params_len == 1)
1544 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1545 else
1546 freq = rx_status->freq;
1547
1548 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1549
1550 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1551 return;
1552
05c914fe 1553 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
98c8fccf
JB		 1554 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1555 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1556
1557 rcu_read_lock();
1558
1559 sta = sta_info_get(local, mgmt->sa);
1560 if (sta) {
1561 u64 prev_rates;
1562
323ce79a 1563 prev_rates = sta->sta.supp_rates[band];
98c8fccf 1564 /* make sure mandatory rates are always added */
323ce79a 1565 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 1566 ieee80211_mandatory_rates(local, band);
98c8fccf
JB		 1567
1568#ifdef CONFIG_MAC80211_IBSS_DEBUG
323ce79a 1569 if (sta->sta.supp_rates[band] != prev_rates)
98c8fccf 1570 printk(KERN_DEBUG "%s: updated supp_rates set "
0c68ae26 1571 "for %pM based on beacon info (0x%llx | "
98c8fccf 1572 "0x%llx -> 0x%llx)\n",
17741cdc 1573 sdata->dev->name,
0c68ae26 1574 sta->sta.addr,
98c8fccf
JB		 1575 (unsigned long long) prev_rates,
1576 (unsigned long long) supp_rates,
323ce79a 1577 (unsigned long long) sta->sta.supp_rates[band]);
98c8fccf
JB		 1578#endif
1579 } else {
ab1f5c0b 1580 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
98c8fccf
JB		 1581 }
1582
1583 rcu_read_unlock();
1584 }
1585
1586 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1587 freq, beacon);
1588 if (!bss)
1589 return;
1590
1591 /* was just updated in ieee80211_bss_info_update */
1592 beacon_timestamp = bss->timestamp;
1593
30b89b0f
JB		 1594 /*
1595 * In STA mode, the remaining parameters should not be overridden
1596 * by beacons because they're not necessarily accurate there.
1597 */
05c914fe 1598 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
9859b81e 1599 bss->last_probe_resp && beacon) {
3e122be0 1600 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1601 return;
1602 }
1603
9d9bf77d 1604 /* check if we need to merge IBSS */
05c914fe 1605 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
fba4a1e6 1606 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1607 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1608 elems->ssid_len == sdata->u.sta.ssid_len &&
1609 memcmp(elems->ssid, sdata->u.sta.ssid,
1610 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1611 if (rx_status->flag & RX_FLAG_TSFT) {
1612 /* in order for correct IBSS merging we need mactime
1613 *
1614 * since mactime is defined as the time the first data
1615 * symbol of the frame hits the PHY, and the timestamp
1616 * of the beacon is defined as "the time that the data
1617 * symbol containing the first bit of the timestamp is
1618 * transmitted to the PHY plus the transmitting STA’s
1619 * delays through its local PHY from the MAC-PHY
1620 * interface to its interface with the WM"
1621 * (802.11 11.1.2) - equals the time this bit arrives at
1622 * the receiver - we have to take into account the
1623 * offset between the two.
1624 * e.g: at 1 MBit that means mactime is 192 usec earlier
1625 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1626 */
0fb8ca45
JM		 1627 int rate;
1628 if (rx_status->flag & RX_FLAG_HT) {
1629 rate = 65; /* TODO: HT rates */
1630 } else {
1631 rate = local->hw.wiphy->bands[band]->
9d9bf77d 1632 bitrates[rx_status->rate_idx].bitrate;
0fb8ca45 1633 }
9d9bf77d
BR		 1634 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1635 } else if (local && local->ops && local->ops->get_tsf)
1636 /* second best option: get current TSF */
1637 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1638 else
1639 /* can't merge without knowing the TSF */
1640 rx_timestamp = -1LLU;
1641#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1642 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1643 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1644 mgmt->sa, mgmt->bssid,
9d9bf77d
BR		 1645 (unsigned long long)rx_timestamp,
1646 (unsigned long long)beacon_timestamp,
1647 (unsigned long long)(rx_timestamp - beacon_timestamp),
1648 jiffies);
1649#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1650 if (beacon_timestamp > rx_timestamp) {
576fdeae 1651#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd 1652 printk(KERN_DEBUG "%s: beacon TSF higher than "
0c68ae26
JB		 1653 "local TSF - IBSS merge with BSSID %pM\n",
1654 sdata->dev->name, mgmt->bssid);
fba4a1e6 1655#endif
f698d856 1656 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
ab1f5c0b 1657 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
9d9bf77d
BR		 1658 }
1659 }
1660
3e122be0 1661 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1662}
1663
1664
f698d856 1665static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1666 struct ieee80211_mgmt *mgmt,
1667 size_t len,
1668 struct ieee80211_rx_status *rx_status)
1669{
ae6a44e3
EK		 1670 size_t baselen;
1671 struct ieee802_11_elems elems;
9859b81e 1672 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1673
8e7cdbb6
TW		 1674 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1675 return; /* ignore ProbeResp to foreign address */
1676
ae6a44e3
EK		 1677 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1678 if (baselen > len)
1679 return;
1680
1681 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1682 &elems);
1683
98c8fccf 1684 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1685
1686 /* direct probe may be part of the association flow */
1687 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1688 &ifsta->request)) {
1689 printk(KERN_DEBUG "%s direct probe responded\n",
1690 sdata->dev->name);
1691 ieee80211_authenticate(sdata, ifsta);
1692 }
f0706e82
JB		 1693}
1694
1695
f698d856 1696static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1697 struct ieee80211_mgmt *mgmt,
1698 size_t len,
1699 struct ieee80211_rx_status *rx_status)
1700{
f0706e82 1701 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1702 size_t baselen;
1703 struct ieee802_11_elems elems;
f698d856 1704 struct ieee80211_local *local = sdata->local;
471b3efd 1705 u32 changed = 0;
7a5158ef
JB		 1706 bool erp_valid;
1707 u8 erp_value = 0;
f0706e82 1708
ae6a44e3
EK		 1709 /* Process beacon from the current BSS */
1710 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1711 if (baselen > len)
1712 return;
1713
1714 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1715
98c8fccf 1716 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1717
05c914fe 1718 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1719 return;
1720 ifsta = &sdata->u.sta;
1721
d6f2da5b 1722 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1723 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1724 return;
1725
fe3fa827
JB		 1726 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1727 elems.wmm_param_len);
1728
7a5158ef
JB		 1729
1730 if (elems.erp_info && elems.erp_info_len >= 1) {
1731 erp_valid = true;
1732 erp_value = elems.erp_info[0];
1733 } else {
1734 erp_valid = false;
50c4afb9 1735 }
7a5158ef
JB		 1736 changed |= ieee80211_handle_bss_capability(sdata,
1737 le16_to_cpu(mgmt->u.beacon.capab_info),
1738 erp_valid, erp_value);
f0706e82 1739
d3c990fb 1740
ae5eb026
JB		 1741 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1742 struct sta_info *sta;
1743 struct ieee80211_supported_band *sband;
1744 u16 ap_ht_cap_flags;
1745
1746 rcu_read_lock();
1747
1748 sta = sta_info_get(local, ifsta->bssid);
1749 if (!sta) {
1750 rcu_read_unlock();
1751 return;
1752 }
1753
1754 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1755
1756 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1757 elems.ht_cap_elem, &sta->sta.ht_cap);
1758
1759 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1760
1761 rcu_read_unlock();
1762
1763 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1764 ap_ht_cap_flags);
d3c990fb
RR		 1765 }
1766
3f2355cb
LR		 1767 if (elems.country_elem) {
1768 /* Note we are only reviewing this on beacons
1769 * for the BSSID we are associated to */
1770 regulatory_hint_11d(local->hw.wiphy,
1771 elems.country_elem, elems.country_elem_len);
1772 }
1773
471b3efd 1774 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1775}
1776
1777
f698d856 1778static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1779 struct ieee80211_if_sta *ifsta,
1780 struct ieee80211_mgmt *mgmt,
1781 size_t len,
1782 struct ieee80211_rx_status *rx_status)
1783{
f698d856 1784 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1785 int tx_last_beacon;
1786 struct sk_buff *skb;
1787 struct ieee80211_mgmt *resp;
1788 u8 *pos, *end;
1789
05c914fe 1790 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
48c2fc59 1791 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 1792 len < 24 + 2 || !ifsta->probe_resp)
1793 return;
1794
1795 if (local->ops->tx_last_beacon)
1796 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1797 else
1798 tx_last_beacon = 1;
1799
1800#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1801 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1802 " (tx_last_beacon=%d)\n",
1803 sdata->dev->name, mgmt->sa, mgmt->da,
1804 mgmt->bssid, tx_last_beacon);
f0706e82
JB		 1805#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1806
1807 if (!tx_last_beacon)
1808 return;
1809
1810 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1811 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1812 return;
1813
1814 end = ((u8 *) mgmt) + len;
1815 pos = mgmt->u.probe_req.variable;
1816 if (pos[0] != WLAN_EID_SSID ||
1817 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 1818#ifdef CONFIG_MAC80211_IBSS_DEBUG
1819 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0c68ae26
JB		 1820 "from %pM\n",
1821 sdata->dev->name, mgmt->sa);
f4ea83dd 1822#endif
f0706e82
JB		 1823 return;
1824 }
1825 if (pos[1] != 0 &&
1826 (pos[1] != ifsta->ssid_len ||
1827 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1828 /* Ignore ProbeReq for foreign SSID */
1829 return;
1830 }
1831
1832 /* Reply with ProbeResp */
0ec0b7ac 1833 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1834 if (!skb)
1835 return;
1836
1837 resp = (struct ieee80211_mgmt *) skb->data;
1838 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1839#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1840 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1841 sdata->dev->name, resp->da);
f0706e82 1842#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 1843 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 1844}
1845
f698d856 1846void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 1847 struct ieee80211_rx_status *rx_status)
1848{
f698d856 1849 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1850 struct ieee80211_if_sta *ifsta;
1851 struct ieee80211_mgmt *mgmt;
1852 u16 fc;
1853
1854 if (skb->len < 24)
1855 goto fail;
1856
f0706e82
JB		 1857 ifsta = &sdata->u.sta;
1858
1859 mgmt = (struct ieee80211_mgmt *) skb->data;
1860 fc = le16_to_cpu(mgmt->frame_control);
1861
1862 switch (fc & IEEE80211_FCTL_STYPE) {
1863 case IEEE80211_STYPE_PROBE_REQ:
1864 case IEEE80211_STYPE_PROBE_RESP:
1865 case IEEE80211_STYPE_BEACON:
1866 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1867 case IEEE80211_STYPE_AUTH:
1868 case IEEE80211_STYPE_ASSOC_RESP:
1869 case IEEE80211_STYPE_REASSOC_RESP:
1870 case IEEE80211_STYPE_DEAUTH:
1871 case IEEE80211_STYPE_DISASSOC:
1872 skb_queue_tail(&ifsta->skb_queue, skb);
1873 queue_work(local->hw.workqueue, &ifsta->work);
1874 return;
f0706e82
JB		 1875 }
1876
1877 fail:
1878 kfree_skb(skb);
1879}
1880
f698d856 1881static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1882 struct sk_buff *skb)
1883{
1884 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 1885 struct ieee80211_if_sta *ifsta;
1886 struct ieee80211_mgmt *mgmt;
1887 u16 fc;
1888
f0706e82
JB		 1889 ifsta = &sdata->u.sta;
1890
1891 rx_status = (struct ieee80211_rx_status *) skb->cb;
1892 mgmt = (struct ieee80211_mgmt *) skb->data;
1893 fc = le16_to_cpu(mgmt->frame_control);
1894
1895 switch (fc & IEEE80211_FCTL_STYPE) {
1896 case IEEE80211_STYPE_PROBE_REQ:
f698d856 1897 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 1898 rx_status);
1899 break;
1900 case IEEE80211_STYPE_PROBE_RESP:
f698d856 1901 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1902 break;
1903 case IEEE80211_STYPE_BEACON:
f698d856 1904 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1905 break;
1906 case IEEE80211_STYPE_AUTH:
f698d856 1907 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1908 break;
1909 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 1910 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 1911 break;
1912 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 1913 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 1914 break;
1915 case IEEE80211_STYPE_DEAUTH:
f698d856 1916 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1917 break;
1918 case IEEE80211_STYPE_DISASSOC:
f698d856 1919 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1920 break;
1921 }
1922
1923 kfree_skb(skb);
1924}
1925
1926
f698d856 1927static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 1928{
f698d856 1929 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1930 int active = 0;
1931 struct sta_info *sta;
1932
d0709a65
JB		 1933 rcu_read_lock();
1934
1935 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1936 if (sta->sdata == sdata &&
f0706e82
JB		 1937 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1938 jiffies)) {
1939 active++;
1940 break;
1941 }
1942 }
d0709a65
JB		 1943
1944 rcu_read_unlock();
f0706e82
JB		 1945
1946 return active;
1947}
1948
1949
f698d856 1950static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1951 struct ieee80211_if_sta *ifsta)
1952{
1953 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1954
f698d856
JBG		 1955 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1956 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 1957 return;
1958
1959 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 1960 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
c2b13452 1961 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1962}
1963
1964
9c6bd790 1965static void ieee80211_sta_timer(unsigned long data)
f0706e82 1966{
60f8b39c
JB		 1967 struct ieee80211_sub_if_data *sdata =
1968 (struct ieee80211_sub_if_data *) data;
1969 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1970 struct ieee80211_local *local = sdata->local;
f0706e82 1971
60f8b39c
JB		 1972 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1973 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 1974}
1975
f698d856 1976static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1977 struct ieee80211_if_sta *ifsta)
1978{
f698d856 1979 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1980
1981 if (local->ops->reset_tsf) {
1982 /* Reset own TSF to allow time synchronization work. */
1983 local->ops->reset_tsf(local_to_hw(local));
1984 }
1985
1986 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1987
1988
1989 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1990 ifsta->auth_alg = WLAN_AUTH_OPEN;
1991 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1992 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1993 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1994 ifsta->auth_alg = WLAN_AUTH_LEAP;
1995 else
1996 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 1997 ifsta->auth_transaction = -1;
d6f2da5b 1998 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 1999 ifsta->assoc_scan_tries = 0;
9859b81e 2000 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 2001 ifsta->auth_tries = 0;
2002 ifsta->assoc_tries = 0;
24e64622 2003 netif_tx_stop_all_queues(sdata->dev);
f698d856 2004 netif_carrier_off(sdata->dev);
f0706e82
JB		 2005}
2006
2007
f0706e82
JB		 2008static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2009 const char *ssid, int ssid_len)
2010{
2011 int tmp, hidden_ssid;
2012
48225709
MW		 2013 if (ssid_len == ifsta->ssid_len &&
2014 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2015 return 1;
2016
d6f2da5b 2017 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2018 return 0;
2019
2020 hidden_ssid = 1;
2021 tmp = ssid_len;
2022 while (tmp--) {
2023 if (ssid[tmp] != '\0') {
2024 hidden_ssid = 0;
2025 break;
2026 }
2027 }
2028
cb3da8cc 2029 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
f0706e82
JB		 2030 return 1;
2031
2032 if (ssid_len == 1 && ssid[0] == ' ')
2033 return 1;
2034
2035 return 0;
2036}
2037
f698d856 2038static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2039 struct ieee80211_if_sta *ifsta)
2040{
f698d856 2041 struct ieee80211_local *local = sdata->local;
c2b13452 2042 struct ieee80211_bss *bss;
8318d78a 2043 struct ieee80211_supported_band *sband;
f0706e82
JB		 2044 u8 bssid[ETH_ALEN], *pos;
2045 int i;
167ad6f7 2046 int ret;
f0706e82
JB		 2047
2048#if 0
2049 /* Easier testing, use fixed BSSID. */
2050 memset(bssid, 0xfe, ETH_ALEN);
2051#else
2052 /* Generate random, not broadcast, locally administered BSSID. Mix in
2053 * own MAC address to make sure that devices that do not have proper
2054 * random number generator get different BSSID. */
2055 get_random_bytes(bssid, ETH_ALEN);
2056 for (i = 0; i < ETH_ALEN; i++)
f698d856 2057 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 2058 bssid[0] &= ~0x01;
2059 bssid[0] |= 0x02;
2060#endif
2061
0c68ae26
JB		 2062 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2063 sdata->dev->name, bssid);
f0706e82 2064
98c8fccf 2065 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2066 local->hw.conf.channel->center_freq,
cffdd30d 2067 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2068 if (!bss)
2069 return -ENOMEM;
2070
8318d78a
JB		 2071 bss->band = local->hw.conf.channel->band;
2072 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2073
2074 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2075 local->hw.conf.beacon_int = 100;
f0706e82 2076 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2077 bss->last_update = jiffies;
2078 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2079
2080 if (sdata->default_key)
f0706e82 2081 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2082 else
f0706e82 2083 sdata->drop_unencrypted = 0;
988c0f72 2084
8318d78a 2085 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2086 pos = bss->supp_rates;
8318d78a
JB		 2087 for (i = 0; i < sband->n_bitrates; i++) {
2088 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2089 *pos++ = (u8) (rate / 5);
2090 }
2091
f698d856 2092 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2093 ieee80211_rx_bss_put(local, bss);
167ad6f7 2094 return ret;
f0706e82
JB		 2095}
2096
2097
f698d856 2098static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2099 struct ieee80211_if_sta *ifsta)
2100{
f698d856 2101 struct ieee80211_local *local = sdata->local;
c2b13452 2102 struct ieee80211_bss *bss;
f0706e82
JB		 2103 int found = 0;
2104 u8 bssid[ETH_ALEN];
2105 int active_ibss;
2106
2107 if (ifsta->ssid_len == 0)
2108 return -EINVAL;
2109
f698d856 2110 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2111#ifdef CONFIG_MAC80211_IBSS_DEBUG
2112 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2113 sdata->dev->name, active_ibss);
f0706e82 2114#endif /* CONFIG_MAC80211_IBSS_DEBUG */
c2b13452
JB		 2115 spin_lock_bh(&local->bss_lock);
2116 list_for_each_entry(bss, &local->bss_list, list) {
f0706e82
JB		 2117 if (ifsta->ssid_len != bss->ssid_len ||
2118 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2119 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2120 continue;
2121#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26 2122 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
f0706e82
JB		 2123#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2124 memcpy(bssid, bss->bssid, ETH_ALEN);
2125 found = 1;
2126 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2127 break;
2128 }
c2b13452 2129 spin_unlock_bh(&local->bss_lock);
f0706e82
JB		 2130
2131#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b 2132 if (found)
0c68ae26
JB		 2133 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2134 "%pM\n", bssid, ifsta->bssid);
f0706e82 2135#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 2136
2137 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 2138 int ret;
80693ceb
DD		 2139 int search_freq;
2140
2141 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2142 search_freq = bss->freq;
2143 else
2144 search_freq = local->hw.conf.channel->center_freq;
2145
f698d856 2146 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2147 ifsta->ssid, ifsta->ssid_len);
2148 if (!bss)
2149 goto dont_join;
2150
0c68ae26 2151 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
f0706e82 2152 " based on configured SSID\n",
0c68ae26 2153 sdata->dev->name, bssid);
f698d856 2154 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2155 ieee80211_rx_bss_put(local, bss);
167ad6f7 2156 return ret;
f0706e82 2157 }
80693ceb
DD		 2158
2159dont_join:
f0706e82
JB		 2160#ifdef CONFIG_MAC80211_IBSS_DEBUG
2161 printk(KERN_DEBUG " did not try to join ibss\n");
2162#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2163
2164 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2165 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2166 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2167 mod_timer(&ifsta->timer, jiffies +
2168 IEEE80211_IBSS_MERGE_INTERVAL);
2169 } else if (time_after(jiffies, local->last_scan_completed +
2170 IEEE80211_SCAN_INTERVAL)) {
2171 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2172 "join\n", sdata->dev->name);
c2b13452 2173 return ieee80211_request_scan(sdata, ifsta->ssid,
f0706e82 2174 ifsta->ssid_len);
48c2fc59 2175 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2176 int interval = IEEE80211_SCAN_INTERVAL;
2177
2178 if (time_after(jiffies, ifsta->ibss_join_req +
2179 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2180 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2181 (!(local->oper_channel->flags &
2182 IEEE80211_CHAN_NO_IBSS)))
f698d856 2183 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2184 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2185 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2186 " %d MHz\n", sdata->dev->name,
8318d78a 2187 local->hw.conf.channel->center_freq);
f0706e82
JB		 2188 }
2189
2190 /* No IBSS found - decrease scan interval and continue
2191 * scanning. */
2192 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2193 }
2194
48c2fc59 2195 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2196 mod_timer(&ifsta->timer, jiffies + interval);
2197 return 0;
2198 }
2199
2200 return 0;
2201}
2202
2203
9c6bd790
JB		 2204static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2205 struct ieee80211_if_sta *ifsta)
f0706e82 2206{
9c6bd790 2207 struct ieee80211_local *local = sdata->local;
c2b13452 2208 struct ieee80211_bss *bss, *selected = NULL;
9c6bd790 2209 int top_rssi = 0, freq;
f0706e82 2210
c2b13452 2211 spin_lock_bh(&local->bss_lock);
9c6bd790 2212 freq = local->oper_channel->center_freq;
c2b13452 2213 list_for_each_entry(bss, &local->bss_list, list) {
9c6bd790
JB		 2214 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2215 continue;
f0706e82 2216
9c6bd790
JB		 2217 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2218 IEEE80211_STA_AUTO_BSSID_SEL |
2219 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2220 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2221 !!sdata->default_key))
2222 continue;
f0706e82 2223
9c6bd790
JB		 2224 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2225 bss->freq != freq)
2226 continue;
9d139c81 2227
9c6bd790
JB		 2228 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2229 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2230 continue;
f0706e82 2231
9c6bd790
JB		 2232 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2233 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2234 continue;
9d139c81 2235
9c6bd790
JB		 2236 if (!selected || top_rssi < bss->signal) {
2237 selected = bss;
2238 top_rssi = bss->signal;
2239 }
f0706e82 2240 }
9c6bd790
JB		 2241 if (selected)
2242 atomic_inc(&selected->users);
c2b13452 2243 spin_unlock_bh(&local->bss_lock);
9d139c81 2244
9c6bd790
JB		 2245 if (selected) {
2246 ieee80211_set_freq(sdata, selected->freq);
2247 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2248 ieee80211_sta_set_ssid(sdata, selected->ssid,
2249 selected->ssid_len);
2250 ieee80211_sta_set_bssid(sdata, selected->bssid);
2251 ieee80211_sta_def_wmm_params(sdata, selected);
f0706e82 2252
9c6bd790
JB		 2253 /* Send out direct probe if no probe resp was received or
2254 * the one we have is outdated
2255 */
2256 if (!selected->last_probe_resp ||
2257 time_after(jiffies, selected->last_probe_resp
2258 + IEEE80211_SCAN_RESULT_EXPIRE))
2259 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2260 else
2261 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2262
9c6bd790
JB		 2263 ieee80211_rx_bss_put(local, selected);
2264 ieee80211_sta_reset_auth(sdata, ifsta);
2265 return 0;
2266 } else {
2267 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2268 ifsta->assoc_scan_tries++;
2269 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
c2b13452 2270 ieee80211_start_scan(sdata, NULL, 0);
9c6bd790 2271 else
c2b13452 2272 ieee80211_start_scan(sdata, ifsta->ssid,
9c6bd790
JB		 2273 ifsta->ssid_len);
2274 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2275 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2276 } else
2277 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2278 }
2279 return -1;
2280}
2281
2282
2283static void ieee80211_sta_work(struct work_struct *work)
2284{
2285 struct ieee80211_sub_if_data *sdata =
2286 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2287 struct ieee80211_local *local = sdata->local;
2288 struct ieee80211_if_sta *ifsta;
2289 struct sk_buff *skb;
2290
2291 if (!netif_running(sdata->dev))
2292 return;
2293
c2b13452 2294 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2295 return;
2296
05c914fe
JB		 2297 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2298 sdata->vif.type != NL80211_IFTYPE_ADHOC))
9c6bd790 2299 return;
f0706e82
JB		 2300 ifsta = &sdata->u.sta;
2301
9c6bd790
JB		 2302 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2303 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2304
2305 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2306 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2307 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2308 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
c2b13452
JB		 2309 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2310 ifsta->scan_ssid_len);
9c6bd790 2311 return;
f0706e82
JB		 2312 }
2313
9c6bd790
JB		 2314 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2315 if (ieee80211_sta_config_auth(sdata, ifsta))
2316 return;
2317 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2318 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2319 return;
d6f2da5b 2320
9c6bd790
JB		 2321 switch (ifsta->state) {
2322 case IEEE80211_STA_MLME_DISABLED:
2323 break;
2324 case IEEE80211_STA_MLME_DIRECT_PROBE:
2325 ieee80211_direct_probe(sdata, ifsta);
2326 break;
2327 case IEEE80211_STA_MLME_AUTHENTICATE:
2328 ieee80211_authenticate(sdata, ifsta);
2329 break;
2330 case IEEE80211_STA_MLME_ASSOCIATE:
2331 ieee80211_associate(sdata, ifsta);
2332 break;
2333 case IEEE80211_STA_MLME_ASSOCIATED:
2334 ieee80211_associated(sdata, ifsta);
2335 break;
2336 case IEEE80211_STA_MLME_IBSS_SEARCH:
2337 ieee80211_sta_find_ibss(sdata, ifsta);
2338 break;
2339 case IEEE80211_STA_MLME_IBSS_JOINED:
2340 ieee80211_sta_merge_ibss(sdata, ifsta);
2341 break;
2342 default:
2343 WARN_ON(1);
2344 break;
2345 }
2346
2347 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2348 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2349 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2350
2351 ieee80211_set_disassoc(sdata, ifsta, false, true,
2352 WLAN_REASON_UNSPECIFIED);
2353 }
f0706e82
JB		 2354}
2355
9c6bd790
JB		 2356static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2357{
05c914fe 2358 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790
JB		 2359 queue_work(sdata->local->hw.workqueue,
2360 &sdata->u.sta.work);
2361}
f0706e82 2362
9c6bd790
JB		 2363/* interface setup */
2364void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2365{
9c6bd790 2366 struct ieee80211_if_sta *ifsta;
988c0f72 2367
9c6bd790
JB		 2368 ifsta = &sdata->u.sta;
2369 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2370 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2371 (unsigned long) sdata);
2372 skb_queue_head_init(&ifsta->skb_queue);
2373
2374 ifsta->capab = WLAN_CAPABILITY_ESS;
2375 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2376 IEEE80211_AUTH_ALG_SHARED_KEY;
2377 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2378 IEEE80211_STA_AUTO_BSSID_SEL |
2379 IEEE80211_STA_AUTO_CHANNEL_SEL;
2380 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2381 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2382}
2383
9c6bd790
JB		 2384/*
2385 * Add a new IBSS station, will also be called by the RX code when,
2386 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2387 * must be callable in atomic context.
2388 */
f698d856 2389struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
ab1f5c0b 2390 u8 *bssid,u8 *addr, u64 supp_rates)
f0706e82 2391{
f698d856 2392 struct ieee80211_local *local = sdata->local;
f0706e82 2393 struct sta_info *sta;
87291c02 2394 int band = local->hw.conf.channel->band;
f0706e82
JB		 2395
2396 /* TODO: Could consider removing the least recently used entry and
2397 * allow new one to be added. */
2398 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2399 if (net_ratelimit()) {
2400 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0c68ae26 2401 "entry %pM\n", sdata->dev->name, addr);
f0706e82
JB		 2402 }
2403 return NULL;
2404 }
2405
1e188637 2406 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2407 return NULL;
2408
f4ea83dd 2409#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0c68ae26
JB		 2410 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2411 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
f4ea83dd 2412#endif
f0706e82 2413
73651ee6
JB		 2414 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2415 if (!sta)
f0706e82
JB		 2416 return NULL;
2417
07346f81 2418 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2419
8e1535d5 2420 /* make sure mandatory rates are always added */
323ce79a 2421 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 2422 ieee80211_mandatory_rates(local, band);
f0706e82 2423
4b7679a5 2424 rate_control_rate_init(sta);
f0706e82 2425
93e5deb1 2426 if (sta_info_insert(sta))
73651ee6 2427 return NULL;
73651ee6 2428
d0709a65 2429 return sta;
f0706e82
JB		 2430}
2431
9c6bd790
JB		 2432/* configuration hooks */
2433void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2434 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2435{
2436 struct ieee80211_local *local = sdata->local;
60f8b39c 2437
05c914fe 2438 if (sdata->vif.type != NL80211_IFTYPE_STATION)
9c6bd790 2439 return;
60f8b39c 2440
9c6bd790
JB		 2441 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2442 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2443 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2444 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2445
9c6bd790
JB		 2446 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2447 ieee80211_set_disassoc(sdata, ifsta, true, true,
2448 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2449
9c6bd790
JB		 2450 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2451 queue_work(local->hw.workqueue, &ifsta->work);
2452 }
2453}
60f8b39c 2454
9c6bd790
JB		 2455int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2456{
2457 struct ieee80211_if_sta *ifsta;
60f8b39c 2458
9c6bd790
JB		 2459 if (len > IEEE80211_MAX_SSID_LEN)
2460 return -EINVAL;
2461
2462 ifsta = &sdata->u.sta;
2463
2464 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2465 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2466 memcpy(ifsta->ssid, ssid, len);
2467 ifsta->ssid_len = len;
2468 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
60f8b39c 2469 }
60f8b39c 2470
9c6bd790
JB		 2471 if (len)
2472 ifsta->flags |= IEEE80211_STA_SSID_SET;
2473 else
2474 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2475
05c914fe 2476 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
9c6bd790
JB		 2477 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2478 ifsta->ibss_join_req = jiffies;
2479 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2480 return ieee80211_sta_find_ibss(sdata, ifsta);
2481 }
2482
2483 return 0;
2484}
2485
2486int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2487{
2488 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2489 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2490 *len = ifsta->ssid_len;
2491 return 0;
2492}
2493
2494int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2495{
2496 struct ieee80211_if_sta *ifsta;
2497 int res;
2498
2499 ifsta = &sdata->u.sta;
2500
2501 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2502 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2503 res = 0;
2504 /*
2505 * Hack! See also ieee80211_sta_set_ssid.
60f8b39c 2506 */
9c6bd790
JB		 2507 if (netif_running(sdata->dev))
2508 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2509 if (res) {
2510 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2511 "the low-level driver\n", sdata->dev->name);
2512 return res;
2513 }
2514 }
60f8b39c 2515
9c6bd790
JB		 2516 if (is_valid_ether_addr(bssid))
2517 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2518 else
2519 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2520
2521 return 0;
2522}
2523
2524int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2525{
2526 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2527
2528 kfree(ifsta->extra_ie);
2529 if (len == 0) {
2530 ifsta->extra_ie = NULL;
2531 ifsta->extra_ie_len = 0;
60f8b39c 2532 return 0;
60f8b39c 2533 }
9c6bd790
JB		 2534 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2535 if (!ifsta->extra_ie) {
2536 ifsta->extra_ie_len = 0;
2537 return -ENOMEM;
2538 }
2539 memcpy(ifsta->extra_ie, ie, len);
2540 ifsta->extra_ie_len = len;
2541 return 0;
60f8b39c
JB		 2542}
2543
f698d856 2544int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2545{
f0706e82
JB		 2546 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2547
f4ea83dd 2548 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2549 sdata->dev->name, reason);
f0706e82 2550
05c914fe
JB		 2551 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2552 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82
JB		 2553 return -EINVAL;
2554
aa458d17 2555 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2556 return 0;
2557}
2558
f698d856 2559int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2560{
f0706e82
JB		 2561 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2562
f4ea83dd 2563 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2564 sdata->dev->name, reason);
f0706e82 2565
05c914fe 2566 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 2567 return -EINVAL;
2568
d6f2da5b 2569 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2570 return -1;
2571
aa458d17 2572 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2573 return 0;
2574}
84363e6e 2575
9c6bd790
JB		 2576/* scan finished notification */
2577void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2578{
2579 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2580 struct ieee80211_if_sta *ifsta;
2581
05c914fe 2582 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB		 2583 ifsta = &sdata->u.sta;
2584 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2585 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2586 !ieee80211_sta_active_ibss(sdata)))
2587 ieee80211_sta_find_ibss(sdata, ifsta);
2588 }
2589
2590 /* Restart STA timers */
2591 rcu_read_lock();
2592 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2593 ieee80211_restart_sta_timer(sdata);
2594 rcu_read_unlock();
2595}
Linux kernel - Deliverables
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