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mac80211: fix scan vs. interface removal race
[GitHub/mt8127/android_kernel_alcatel_ttab.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>
17#include <linux/netdevice.h>
18#include <linux/if_arp.h>
19#include <linux/wireless.h>
20#include <linux/random.h>
21#include <linux/etherdevice.h>
d0709a65 22#include <linux/rtnetlink.h>
f0706e82 23#include <net/iw_handler.h>
f0706e82 24#include <net/mac80211.h>
472dbc45 25#include <asm/unaligned.h>
60f8b39c 26
f0706e82 27#include "ieee80211_i.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
6042a3e3 31#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 32#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
33#define IEEE80211_AUTH_MAX_TRIES 3
34#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
35#define IEEE80211_ASSOC_MAX_TRIES 3
36#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
37#define IEEE80211_PROBE_INTERVAL (60 * HZ)
38#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
39#define IEEE80211_SCAN_INTERVAL (2 * HZ)
40#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 41#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82 42
f0706e82
JB		 43#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
44#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
45
46#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
47
48
5484e237
JB		 49/* utils */
50static int ecw2cw(int ecw)
60f8b39c 51{
5484e237 52 return (1 << ecw) - 1;
60f8b39c
JB		 53}
54
55static u8 *ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
43ac2ca3
JM		 56{
57 u8 *end, *pos;
58
59 pos = bss->ies;
60 if (pos == NULL)
61 return NULL;
62 end = pos + bss->ies_len;
63
64 while (pos + 1 < end) {
65 if (pos + 2 + pos[1] > end)
66 break;
67 if (pos[0] == ie)
68 return pos;
69 pos += 2 + pos[1];
70 }
71
72 return NULL;
73}
74
9ac19a90
JB		 75static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
76 struct ieee80211_supported_band *sband,
77 u64 *rates)
78{
79 int i, j, count;
80 *rates = 0;
81 count = 0;
82 for (i = 0; i < bss->supp_rates_len; i++) {
83 int rate = (bss->supp_rates[i] & 0x7F) * 5;
84
85 for (j = 0; j < sband->n_bitrates; j++)
86 if (sband->bitrates[j].bitrate == rate) {
87 *rates |= BIT(j);
88 count++;
89 break;
90 }
91 }
92
93 return count;
94}
95
60f8b39c 96/* frame sending functions */
60f8b39c
JB		 97static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
98 struct ieee80211_if_sta *ifsta,
99 int transaction, u8 *extra, size_t extra_len,
100 int encrypt)
101{
102 struct ieee80211_local *local = sdata->local;
103 struct sk_buff *skb;
104 struct ieee80211_mgmt *mgmt;
105
106 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
107 sizeof(*mgmt) + 6 + extra_len);
108 if (!skb) {
109 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
110 "frame\n", sdata->dev->name);
111 return;
112 }
113 skb_reserve(skb, local->hw.extra_tx_headroom);
114
115 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
116 memset(mgmt, 0, 24 + 6);
117 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
118 IEEE80211_STYPE_AUTH);
119 if (encrypt)
120 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
121 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
122 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
123 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
124 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
125 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
126 ifsta->auth_transaction = transaction + 1;
127 mgmt->u.auth.status_code = cpu_to_le16(0);
128 if (extra)
129 memcpy(skb_put(skb, extra_len), extra, extra_len);
130
e50db65c 131 ieee80211_tx_skb(sdata, skb, encrypt);
60f8b39c
JB		 132}
133
0a51b27e
JB		 134void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
135 u8 *ssid, size_t ssid_len)
60f8b39c
JB		 136{
137 struct ieee80211_local *local = sdata->local;
138 struct ieee80211_supported_band *sband;
139 struct sk_buff *skb;
140 struct ieee80211_mgmt *mgmt;
141 u8 *pos, *supp_rates, *esupp_rates = NULL;
142 int i;
143
144 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
145 if (!skb) {
146 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
147 "request\n", sdata->dev->name);
148 return;
149 }
150 skb_reserve(skb, local->hw.extra_tx_headroom);
151
152 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
153 memset(mgmt, 0, 24);
154 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
155 IEEE80211_STYPE_PROBE_REQ);
156 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
157 if (dst) {
158 memcpy(mgmt->da, dst, ETH_ALEN);
159 memcpy(mgmt->bssid, dst, ETH_ALEN);
160 } else {
161 memset(mgmt->da, 0xff, ETH_ALEN);
162 memset(mgmt->bssid, 0xff, ETH_ALEN);
163 }
164 pos = skb_put(skb, 2 + ssid_len);
165 *pos++ = WLAN_EID_SSID;
166 *pos++ = ssid_len;
167 memcpy(pos, ssid, ssid_len);
168
169 supp_rates = skb_put(skb, 2);
170 supp_rates[0] = WLAN_EID_SUPP_RATES;
171 supp_rates[1] = 0;
172 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
173
174 for (i = 0; i < sband->n_bitrates; i++) {
175 struct ieee80211_rate *rate = &sband->bitrates[i];
176 if (esupp_rates) {
177 pos = skb_put(skb, 1);
178 esupp_rates[1]++;
179 } else if (supp_rates[1] == 8) {
180 esupp_rates = skb_put(skb, 3);
181 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
182 esupp_rates[1] = 1;
183 pos = &esupp_rates[2];
184 } else {
185 pos = skb_put(skb, 1);
186 supp_rates[1]++;
187 }
188 *pos = rate->bitrate / 5;
189 }
190
e50db65c 191 ieee80211_tx_skb(sdata, skb, 0);
60f8b39c
JB		 192}
193
9ac19a90
JB		 194static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
195 struct ieee80211_if_sta *ifsta)
196{
197 struct ieee80211_local *local = sdata->local;
198 struct sk_buff *skb;
199 struct ieee80211_mgmt *mgmt;
200 u8 *pos, *ies, *ht_add_ie;
201 int i, len, count, rates_len, supp_rates_len;
202 u16 capab;
203 struct ieee80211_sta_bss *bss;
204 int wmm = 0;
205 struct ieee80211_supported_band *sband;
206 u64 rates = 0;
207
208 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
209 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
210 ifsta->ssid_len);
211 if (!skb) {
212 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
213 "frame\n", sdata->dev->name);
214 return;
215 }
216 skb_reserve(skb, local->hw.extra_tx_headroom);
217
218 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
219
220 capab = ifsta->capab;
221
222 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
223 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
224 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
225 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
226 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
227 }
228
229 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
230 local->hw.conf.channel->center_freq,
231 ifsta->ssid, ifsta->ssid_len);
232 if (bss) {
233 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
234 capab |= WLAN_CAPABILITY_PRIVACY;
235 if (bss->wmm_used)
236 wmm = 1;
237
238 /* get all rates supported by the device and the AP as
239 * some APs don't like getting a superset of their rates
240 * in the association request (e.g. D-Link DAP 1353 in
241 * b-only mode) */
242 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
243
244 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
245 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
246 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
247
248 ieee80211_rx_bss_put(local, bss);
249 } else {
250 rates = ~0;
251 rates_len = sband->n_bitrates;
252 }
253
254 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
255 memset(mgmt, 0, 24);
256 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
257 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
258 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
259
260 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
261 skb_put(skb, 10);
262 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
263 IEEE80211_STYPE_REASSOC_REQ);
264 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
265 mgmt->u.reassoc_req.listen_interval =
266 cpu_to_le16(local->hw.conf.listen_interval);
267 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
268 ETH_ALEN);
269 } else {
270 skb_put(skb, 4);
271 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
272 IEEE80211_STYPE_ASSOC_REQ);
273 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
274 mgmt->u.reassoc_req.listen_interval =
275 cpu_to_le16(local->hw.conf.listen_interval);
276 }
277
278 /* SSID */
279 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
280 *pos++ = WLAN_EID_SSID;
281 *pos++ = ifsta->ssid_len;
282 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
283
284 /* add all rates which were marked to be used above */
285 supp_rates_len = rates_len;
286 if (supp_rates_len > 8)
287 supp_rates_len = 8;
288
289 len = sband->n_bitrates;
290 pos = skb_put(skb, supp_rates_len + 2);
291 *pos++ = WLAN_EID_SUPP_RATES;
292 *pos++ = supp_rates_len;
293
294 count = 0;
295 for (i = 0; i < sband->n_bitrates; i++) {
296 if (BIT(i) & rates) {
297 int rate = sband->bitrates[i].bitrate;
298 *pos++ = (u8) (rate / 5);
299 if (++count == 8)
300 break;
301 }
302 }
303
304 if (rates_len > count) {
305 pos = skb_put(skb, rates_len - count + 2);
306 *pos++ = WLAN_EID_EXT_SUPP_RATES;
307 *pos++ = rates_len - count;
308
309 for (i++; i < sband->n_bitrates; i++) {
310 if (BIT(i) & rates) {
311 int rate = sband->bitrates[i].bitrate;
312 *pos++ = (u8) (rate / 5);
313 }
314 }
315 }
316
317 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
318 /* 1. power capabilities */
319 pos = skb_put(skb, 4);
320 *pos++ = WLAN_EID_PWR_CAPABILITY;
321 *pos++ = 2;
322 *pos++ = 0; /* min tx power */
323 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
324
325 /* 2. supported channels */
326 /* TODO: get this in reg domain format */
327 pos = skb_put(skb, 2 * sband->n_channels + 2);
328 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
329 *pos++ = 2 * sband->n_channels;
330 for (i = 0; i < sband->n_channels; i++) {
331 *pos++ = ieee80211_frequency_to_channel(
332 sband->channels[i].center_freq);
333 *pos++ = 1; /* one channel in the subband*/
334 }
335 }
336
337 if (ifsta->extra_ie) {
338 pos = skb_put(skb, ifsta->extra_ie_len);
339 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
340 }
341
342 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
343 pos = skb_put(skb, 9);
344 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
345 *pos++ = 7; /* len */
346 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
347 *pos++ = 0x50;
348 *pos++ = 0xf2;
349 *pos++ = 2; /* WME */
350 *pos++ = 0; /* WME info */
351 *pos++ = 1; /* WME ver */
352 *pos++ = 0;
353 }
354
355 /* wmm support is a must to HT */
356 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
357 sband->ht_info.ht_supported &&
358 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
359 struct ieee80211_ht_addt_info *ht_add_info =
360 (struct ieee80211_ht_addt_info *)ht_add_ie;
361 u16 cap = sband->ht_info.cap;
362 __le16 tmp;
363 u32 flags = local->hw.conf.channel->flags;
364
365 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
366 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
367 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
368 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
369 cap &= ~IEEE80211_HT_CAP_SGI_40;
370 }
371 break;
372 case IEEE80211_HT_IE_CHA_SEC_BELOW:
373 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
374 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
375 cap &= ~IEEE80211_HT_CAP_SGI_40;
376 }
377 break;
378 }
379
380 tmp = cpu_to_le16(cap);
381 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
382 *pos++ = WLAN_EID_HT_CAPABILITY;
383 *pos++ = sizeof(struct ieee80211_ht_cap);
384 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
385 memcpy(pos, &tmp, sizeof(u16));
386 pos += sizeof(u16);
387 /* TODO: needs a define here for << 2 */
388 *pos++ = sband->ht_info.ampdu_factor |
389 (sband->ht_info.ampdu_density << 2);
390 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
391 }
392
393 kfree(ifsta->assocreq_ies);
394 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
395 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
396 if (ifsta->assocreq_ies)
397 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
398
e50db65c 399 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 400}
401
402
ef422bc0
JB		 403static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
404 u16 stype, u16 reason)
9ac19a90
JB		 405{
406 struct ieee80211_local *local = sdata->local;
ef422bc0 407 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
9ac19a90
JB		 408 struct sk_buff *skb;
409 struct ieee80211_mgmt *mgmt;
410
411 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
412 if (!skb) {
ef422bc0
JB		 413 printk(KERN_DEBUG "%s: failed to allocate buffer for "
414 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 415 return;
416 }
417 skb_reserve(skb, local->hw.extra_tx_headroom);
418
419 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
420 memset(mgmt, 0, 24);
421 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
422 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
423 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
ef422bc0 424 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 425 skb_put(skb, 2);
ef422bc0 426 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 427 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
428
e50db65c 429 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 430}
431
60f8b39c 432/* MLME */
f698d856 433static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
b079ada7 434 struct ieee80211_sta_bss *bss)
e2839d8f 435{
e2839d8f
VK		 436 struct ieee80211_local *local = sdata->local;
437 int i, have_higher_than_11mbit = 0;
438
e2839d8f
VK		 439 /* cf. IEEE 802.11 9.2.12 */
440 for (i = 0; i < bss->supp_rates_len; i++)
441 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
442 have_higher_than_11mbit = 1;
443
444 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
445 have_higher_than_11mbit)
446 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
447 else
448 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
449
3d35f7c6 450 ieee80211_set_wmm_default(sdata);
e2839d8f
VK		 451}
452
f698d856 453static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 454 struct ieee80211_if_sta *ifsta,
455 u8 *wmm_param, size_t wmm_param_len)
456{
f0706e82
JB		 457 struct ieee80211_tx_queue_params params;
458 size_t left;
459 int count;
460 u8 *pos;
461
3434fbd3
JB		 462 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
463 return;
464
465 if (!wmm_param)
466 return;
467
f0706e82
JB		 468 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
469 return;
470 count = wmm_param[6] & 0x0f;
471 if (count == ifsta->wmm_last_param_set)
472 return;
473 ifsta->wmm_last_param_set = count;
474
475 pos = wmm_param + 8;
476 left = wmm_param_len - 8;
477
478 memset(&params, 0, sizeof(params));
479
480 if (!local->ops->conf_tx)
481 return;
482
483 local->wmm_acm = 0;
484 for (; left >= 4; left -= 4, pos += 4) {
485 int aci = (pos[0] >> 5) & 0x03;
486 int acm = (pos[0] >> 4) & 0x01;
487 int queue;
488
489 switch (aci) {
490 case 1:
e100bb64 491 queue = 3;
988c0f72 492 if (acm)
f0706e82 493 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 494 break;
495 case 2:
e100bb64 496 queue = 1;
988c0f72 497 if (acm)
f0706e82 498 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 499 break;
500 case 3:
e100bb64 501 queue = 0;
988c0f72 502 if (acm)
f0706e82 503 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 504 break;
505 case 0:
506 default:
e100bb64 507 queue = 2;
988c0f72 508 if (acm)
f0706e82 509 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 510 break;
511 }
512
513 params.aifs = pos[0] & 0x0f;
514 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
515 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 516 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 517#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 518 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 519 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 520 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 521 params.cw_max, params.txop);
522#endif
f0706e82
JB		 523 /* TODO: handle ACM (block TX, fallback to next lowest allowed
524 * AC for now) */
525 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
526 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 527 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 528 }
529 }
530}
531
50c4afb9
JL		 532static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
533 bool use_protection,
534 bool use_short_preamble)
5628221c 535{
471b3efd 536 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
ebd74487 537#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 538 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
0795af57 539 DECLARE_MAC_BUF(mac);
ebd74487 540#endif
471b3efd 541 u32 changed = 0;
5628221c 542
471b3efd 543 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 544#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c
DD		 545 if (net_ratelimit()) {
546 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 547 "%s)\n",
471b3efd 548 sdata->dev->name,
5628221c 549 use_protection ? "enabled" : "disabled",
0795af57 550 print_mac(mac, ifsta->bssid));
5628221c 551 }
f4ea83dd 552#endif
471b3efd
JB		 553 bss_conf->use_cts_prot = use_protection;
554 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 555 }
7e9ed188 556
d43c7b37 557 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 558#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 559 if (net_ratelimit()) {
560 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 561 " (BSSID=%s)\n",
471b3efd 562 sdata->dev->name,
d43c7b37 563 use_short_preamble ? "short" : "long",
0795af57 564 print_mac(mac, ifsta->bssid));
7e9ed188 565 }
f4ea83dd 566#endif
d43c7b37 567 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 568 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 569 }
d9430a32 570
471b3efd 571 return changed;
5628221c
DD		 572}
573
50c4afb9
JL		 574static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
575 u8 erp_value)
576{
577 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
578 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
579
580 return ieee80211_handle_protect_preamb(sdata,
581 use_protection, use_short_preamble);
582}
583
584static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
585 struct ieee80211_sta_bss *bss)
586{
587 u32 changed = 0;
588
589 if (bss->has_erp_value)
590 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
591 else {
592 u16 capab = bss->capability;
593 changed |= ieee80211_handle_protect_preamb(sdata, false,
594 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
595 }
596
597 return changed;
598}
599
f5e5bf25
TW		 600static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
601 struct ieee80211_if_sta *ifsta)
602{
603 union iwreq_data wrqu;
604 memset(&wrqu, 0, sizeof(wrqu));
605 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
606 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
607 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
608 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
609}
610
f698d856 611static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 612 struct ieee80211_if_sta *ifsta)
613{
f0706e82
JB		 614 union iwreq_data wrqu;
615
f0706e82 616 if (ifsta->assocreq_ies) {
087d833e
JM		 617 memset(&wrqu, 0, sizeof(wrqu));
618 wrqu.data.length = ifsta->assocreq_ies_len;
b171e19e 619 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
087d833e 620 ifsta->assocreq_ies);
f0706e82 621 }
087d833e
JM		 622 if (ifsta->assocresp_ies) {
623 memset(&wrqu, 0, sizeof(wrqu));
624 wrqu.data.length = ifsta->assocresp_ies_len;
b171e19e 625 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
087d833e 626 ifsta->assocresp_ies);
f0706e82 627 }
f0706e82
JB		 628}
629
630
f698d856 631static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
f5e5bf25 632 struct ieee80211_if_sta *ifsta)
f0706e82 633{
471b3efd 634 struct ieee80211_local *local = sdata->local;
38668c05 635 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
471b3efd 636 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 637
f5e5bf25 638 struct ieee80211_sta_bss *bss;
d6f2da5b 639
f5e5bf25 640 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 641
f5e5bf25
TW		 642 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
643 return;
21c0cbe7 644
f5e5bf25
TW		 645 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
646 conf->channel->center_freq,
647 ifsta->ssid, ifsta->ssid_len);
648 if (bss) {
649 /* set timing information */
650 sdata->bss_conf.beacon_int = bss->beacon_int;
651 sdata->bss_conf.timestamp = bss->timestamp;
652 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 653
f5e5bf25 654 changed |= ieee80211_handle_bss_capability(sdata, bss);
9ac19a90
JB		 655
656 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 657 }
658
9ac19a90
JB		 659 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
660 changed |= BSS_CHANGED_HT;
661 sdata->bss_conf.assoc_ht = 1;
662 sdata->bss_conf.ht_conf = &conf->ht_conf;
663 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
f0706e82 664 }
3434fbd3 665
9ac19a90
JB		 666 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
667 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
668 ieee80211_sta_send_associnfo(sdata, ifsta);
9306102e 669
9ac19a90
JB		 670 ifsta->last_probe = jiffies;
671 ieee80211_led_assoc(local, 1);
9306102e 672
9ac19a90
JB		 673 sdata->bss_conf.assoc = 1;
674 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82 675
9ac19a90
JB		 676 netif_tx_start_all_queues(sdata->dev);
677 netif_carrier_on(sdata->dev);
f0706e82 678
9ac19a90 679 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 680}
681
9ac19a90
JB		 682static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
683 struct ieee80211_if_sta *ifsta)
f0706e82 684{
9ac19a90 685 DECLARE_MAC_BUF(mac);
f0706e82 686
9ac19a90
JB		 687 ifsta->direct_probe_tries++;
688 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
689 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
690 sdata->dev->name, print_mac(mac, ifsta->bssid));
691 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 692 return;
693 }
f0706e82 694
9ac19a90
JB		 695 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
696 sdata->dev->name, print_mac(mac, ifsta->bssid),
697 ifsta->direct_probe_tries);
f0706e82 698
9ac19a90 699 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 700
9ac19a90
JB		 701 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
702
703 /* Direct probe is sent to broadcast address as some APs
704 * will not answer to direct packet in unassociated state.
705 */
706 ieee80211_send_probe_req(sdata, NULL,
707 ifsta->ssid, ifsta->ssid_len);
708
709 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 710}
f0706e82 711
9ac19a90
JB		 712
713static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
714 struct ieee80211_if_sta *ifsta)
f0706e82 715{
9ac19a90 716 DECLARE_MAC_BUF(mac);
f0706e82 717
9ac19a90
JB		 718 ifsta->auth_tries++;
719 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
720 printk(KERN_DEBUG "%s: authentication with AP %s"
721 " timed out\n",
722 sdata->dev->name, print_mac(mac, ifsta->bssid));
723 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 724 return;
725 }
f0706e82 726
9ac19a90
JB		 727 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
728 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
729 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 730
9ac19a90
JB		 731 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
732
733 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 734}
735
aa458d17
TW		 736static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
737 struct ieee80211_if_sta *ifsta, bool deauth,
738 bool self_disconnected, u16 reason)
739{
740 struct ieee80211_local *local = sdata->local;
741 struct sta_info *sta;
f5e5bf25 742 u32 changed = BSS_CHANGED_ASSOC;
aa458d17
TW		 743
744 rcu_read_lock();
745
746 sta = sta_info_get(local, ifsta->bssid);
747 if (!sta) {
748 rcu_read_unlock();
749 return;
750 }
751
752 if (deauth) {
753 ifsta->direct_probe_tries = 0;
754 ifsta->auth_tries = 0;
755 }
756 ifsta->assoc_scan_tries = 0;
757 ifsta->assoc_tries = 0;
758
24e64622 759 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 760 netif_carrier_off(sdata->dev);
761
762 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
763
764 if (self_disconnected) {
765 if (deauth)
ef422bc0
JB		 766 ieee80211_send_deauth_disassoc(sdata,
767 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 768 else
ef422bc0
JB		 769 ieee80211_send_deauth_disassoc(sdata,
770 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 771 }
772
f5e5bf25
TW		 773 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
774 changed |= ieee80211_reset_erp_info(sdata);
775
776 if (sdata->bss_conf.assoc_ht)
777 changed |= BSS_CHANGED_HT;
778
779 sdata->bss_conf.assoc_ht = 0;
780 sdata->bss_conf.ht_conf = NULL;
781 sdata->bss_conf.ht_bss_conf = NULL;
782
783 ieee80211_led_assoc(local, 0);
784 sdata->bss_conf.assoc = 0;
785
786 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17
TW		 787
788 if (self_disconnected)
789 ifsta->state = IEEE80211_STA_MLME_DISABLED;
790
791 sta_info_unlink(&sta);
792
793 rcu_read_unlock();
794
795 sta_info_destroy(sta);
796}
f0706e82 797
9ac19a90
JB		 798static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
799{
800 if (!sdata || !sdata->default_key ||
801 sdata->default_key->conf.alg != ALG_WEP)
802 return 0;
803 return 1;
804}
805
f698d856 806static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 807 struct ieee80211_if_sta *ifsta)
808{
f698d856 809 struct ieee80211_local *local = sdata->local;
f0706e82 810 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 811 int bss_privacy;
812 int wep_privacy;
813 int privacy_invoked;
f0706e82 814
5b98b1f7 815 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 816 return 0;
817
f698d856 818 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 819 local->hw.conf.channel->center_freq,
cffdd30d 820 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 821 if (!bss)
822 return 0;
823
5b98b1f7 824 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 825 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 826 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 827
3e122be0 828 ieee80211_rx_bss_put(local, bss);
f0706e82 829
5b98b1f7
JB		 830 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
831 return 0;
832
833 return 1;
f0706e82
JB		 834}
835
f698d856 836static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 837 struct ieee80211_if_sta *ifsta)
838{
0795af57
JP		 839 DECLARE_MAC_BUF(mac);
840
f0706e82
JB		 841 ifsta->assoc_tries++;
842 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 843 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 844 " timed out\n",
f698d856 845 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 846 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 847 return;
848 }
849
48c2fc59 850 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0795af57 851 printk(KERN_DEBUG "%s: associate with AP %s\n",
f698d856
JBG		 852 sdata->dev->name, print_mac(mac, ifsta->bssid));
853 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 854 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 855 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 856 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 857 return;
858 }
859
f698d856 860 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 861
862 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
863}
864
865
f698d856 866static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 867 struct ieee80211_if_sta *ifsta)
868{
f698d856 869 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 870 struct sta_info *sta;
871 int disassoc;
0795af57 872 DECLARE_MAC_BUF(mac);
f0706e82
JB		 873
874 /* TODO: start monitoring current AP signal quality and number of
875 * missed beacons. Scan other channels every now and then and search
876 * for better APs. */
877 /* TODO: remove expired BSSes */
878
48c2fc59 879 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 880
d0709a65
JB		 881 rcu_read_lock();
882
f0706e82
JB		 883 sta = sta_info_get(local, ifsta->bssid);
884 if (!sta) {
0795af57 885 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
f698d856 886 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 887 disassoc = 1;
888 } else {
889 disassoc = 0;
890 if (time_after(jiffies,
891 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 892 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 893 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 894 "current AP %s - assume out of "
f0706e82 895 "range\n",
f698d856 896 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 897 disassoc = 1;
d6f2da5b 898 } else
f698d856 899 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 900 local->scan_ssid,
901 local->scan_ssid_len);
d6f2da5b 902 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 903 } else {
d6f2da5b 904 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 905 if (time_after(jiffies, ifsta->last_probe +
906 IEEE80211_PROBE_INTERVAL)) {
907 ifsta->last_probe = jiffies;
f698d856 908 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 909 ifsta->ssid,
910 ifsta->ssid_len);
911 }
912 }
f0706e82 913 }
d0709a65
JB		 914
915 rcu_read_unlock();
916
60f8b39c
JB		 917 if (disassoc)
918 ieee80211_set_disassoc(sdata, ifsta, true, true,
919 WLAN_REASON_PREV_AUTH_NOT_VALID);
920 else
921 mod_timer(&ifsta->timer, jiffies +
922 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 923}
924
925
f698d856 926static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 927 struct ieee80211_if_sta *ifsta)
928{
f698d856 929 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 930 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 931 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 932}
933
934
f698d856 935static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 936 struct ieee80211_if_sta *ifsta,
937 struct ieee80211_mgmt *mgmt,
938 size_t len)
939{
940 u8 *pos;
941 struct ieee802_11_elems elems;
942
f0706e82 943 pos = mgmt->u.auth.variable;
67a4cce4 944 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 945 if (!elems.challenge)
f0706e82 946 return;
f698d856 947 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 948 elems.challenge_len + 2, 1);
949}
950
f698d856 951static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 952 struct ieee80211_if_sta *ifsta,
953 struct ieee80211_mgmt *mgmt,
954 size_t len)
955{
f0706e82 956 u16 auth_alg, auth_transaction, status_code;
0795af57 957 DECLARE_MAC_BUF(mac);
f0706e82 958
48c2fc59 959 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
f4ea83dd 960 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82 961 return;
f0706e82 962
f4ea83dd 963 if (len < 24 + 6)
f0706e82 964 return;
f0706e82 965
51fb61e7 966 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 967 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 968 return;
f0706e82 969
51fb61e7 970 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 971 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 972 return;
f0706e82
JB		 973
974 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
975 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
976 status_code = le16_to_cpu(mgmt->u.auth.status_code);
977
51fb61e7 978 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
135a2110
JB		 979 /*
980 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 981 * networks and most implementations do not seem to use it.
982 * However, try to reply to authentication attempts if someone
983 * has actually implemented this.
135a2110 984 */
f4ea83dd 985 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 986 return;
f698d856 987 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 988 }
989
990 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 991 auth_transaction != ifsta->auth_transaction)
f0706e82 992 return;
f0706e82
JB		 993
994 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 995 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
996 u8 algs[3];
997 const int num_algs = ARRAY_SIZE(algs);
998 int i, pos;
999 algs[0] = algs[1] = algs[2] = 0xff;
1000 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1001 algs[0] = WLAN_AUTH_OPEN;
1002 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1003 algs[1] = WLAN_AUTH_SHARED_KEY;
1004 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1005 algs[2] = WLAN_AUTH_LEAP;
1006 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1007 pos = 0;
1008 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1009 pos = 1;
1010 else
1011 pos = 2;
1012 for (i = 0; i < num_algs; i++) {
1013 pos++;
1014 if (pos >= num_algs)
1015 pos = 0;
1016 if (algs[pos] == ifsta->auth_alg ||
1017 algs[pos] == 0xff)
1018 continue;
1019 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1020 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1021 continue;
1022 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1023 break;
1024 }
1025 }
1026 return;
1027 }
1028
1029 switch (ifsta->auth_alg) {
1030 case WLAN_AUTH_OPEN:
1031 case WLAN_AUTH_LEAP:
f698d856 1032 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1033 break;
1034 case WLAN_AUTH_SHARED_KEY:
1035 if (ifsta->auth_transaction == 4)
f698d856 1036 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1037 else
f698d856 1038 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1039 break;
1040 }
1041}
1042
1043
f698d856 1044static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1045 struct ieee80211_if_sta *ifsta,
1046 struct ieee80211_mgmt *mgmt,
1047 size_t len)
1048{
1049 u16 reason_code;
0795af57 1050 DECLARE_MAC_BUF(mac);
f0706e82 1051
f4ea83dd 1052 if (len < 24 + 2)
f0706e82 1053 return;
f0706e82 1054
f4ea83dd 1055 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1056 return;
f0706e82
JB		 1057
1058 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1059
988c0f72 1060 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 1061 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 1062
48c2fc59
TW		 1063 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1064 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1065 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1066 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1067 mod_timer(&ifsta->timer, jiffies +
1068 IEEE80211_RETRY_AUTH_INTERVAL);
1069 }
1070
aa458d17 1071 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1072 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1073}
1074
1075
f698d856 1076static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1077 struct ieee80211_if_sta *ifsta,
1078 struct ieee80211_mgmt *mgmt,
1079 size_t len)
1080{
1081 u16 reason_code;
0795af57 1082 DECLARE_MAC_BUF(mac);
f0706e82 1083
f4ea83dd 1084 if (len < 24 + 2)
f0706e82 1085 return;
f0706e82 1086
f4ea83dd 1087 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1088 return;
f0706e82
JB		 1089
1090 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1091
d6f2da5b 1092 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 1093 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 1094
48c2fc59
TW		 1095 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1096 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1097 mod_timer(&ifsta->timer, jiffies +
1098 IEEE80211_RETRY_AUTH_INTERVAL);
1099 }
1100
aa458d17 1101 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
f0706e82
JB		 1102}
1103
1104
471b3efd 1105static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1106 struct ieee80211_if_sta *ifsta,
1107 struct ieee80211_mgmt *mgmt,
1108 size_t len,
1109 int reassoc)
1110{
471b3efd 1111 struct ieee80211_local *local = sdata->local;
8318d78a 1112 struct ieee80211_supported_band *sband;
f0706e82 1113 struct sta_info *sta;
8318d78a 1114 u64 rates, basic_rates;
f0706e82
JB		 1115 u16 capab_info, status_code, aid;
1116 struct ieee802_11_elems elems;
471b3efd 1117 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1118 u8 *pos;
1119 int i, j;
0795af57 1120 DECLARE_MAC_BUF(mac);
8318d78a 1121 bool have_higher_than_11mbit = false;
f0706e82
JB		 1122
1123 /* AssocResp and ReassocResp have identical structure, so process both
1124 * of them in this function. */
1125
48c2fc59 1126 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1127 return;
f0706e82 1128
f4ea83dd 1129 if (len < 24 + 6)
f0706e82 1130 return;
f0706e82 1131
f4ea83dd 1132 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1133 return;
f0706e82
JB		 1134
1135 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1136 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1137 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1138
0795af57 1139 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1140 "status=%d aid=%d)\n",
f698d856 1141 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1142 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1143
1144 if (status_code != WLAN_STATUS_SUCCESS) {
1145 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1146 sdata->dev->name, status_code);
8a69aa93
DD		 1147 /* if this was a reassociation, ensure we try a "full"
1148 * association next time. This works around some broken APs
1149 * which do not correctly reject reassociation requests. */
d6f2da5b 1150 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1151 return;
1152 }
1153
1dd84aa2
JB		 1154 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1155 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1156 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1157 aid &= ~(BIT(15) | BIT(14));
1158
f0706e82 1159 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1160 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1161
1162 if (!elems.supp_rates) {
1163 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1164 sdata->dev->name);
f0706e82
JB		 1165 return;
1166 }
1167
f698d856 1168 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1169 ifsta->aid = aid;
1170 ifsta->ap_capab = capab_info;
1171
1172 kfree(ifsta->assocresp_ies);
1173 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1174 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1175 if (ifsta->assocresp_ies)
1176 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1177
d0709a65
JB		 1178 rcu_read_lock();
1179
f0706e82
JB		 1180 /* Add STA entry for the AP */
1181 sta = sta_info_get(local, ifsta->bssid);
1182 if (!sta) {
1183 struct ieee80211_sta_bss *bss;
73651ee6 1184 int err;
d0709a65 1185
73651ee6
JB		 1186 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1187 if (!sta) {
1188 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1189 " the AP\n", sdata->dev->name);
d0709a65 1190 rcu_read_unlock();
f0706e82
JB		 1191 return;
1192 }
60f8b39c
JB		 1193 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1194 local->hw.conf.channel->center_freq,
1195 ifsta->ssid, ifsta->ssid_len);
1196 if (bss) {
1197 sta->last_signal = bss->signal;
1198 sta->last_qual = bss->qual;
1199 sta->last_noise = bss->noise;
1200 ieee80211_rx_bss_put(local, bss);
1201 }
f709fc69 1202
60f8b39c
JB		 1203 err = sta_info_insert(sta);
1204 if (err) {
1205 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1206 " the AP (error %d)\n", sdata->dev->name, err);
1207 rcu_read_unlock();
1208 return;
f709fc69 1209 }
60f8b39c
JB		 1210 /* update new sta with its last rx activity */
1211 sta->last_rx = jiffies;
f709fc69 1212 }
f709fc69 1213
60f8b39c
JB		 1214 /*
1215 * FIXME: Do we really need to update the sta_info's information here?
1216 * We already know about the AP (we found it in our list) so it
1217 * should already be filled with the right info, no?
1218 * As is stands, all this is racy because typically we assume
1219 * the information that is filled in here (except flags) doesn't
1220 * change while a STA structure is alive. As such, it should move
1221 * to between the sta_info_alloc() and sta_info_insert() above.
1222 */
f709fc69 1223
60f8b39c
JB		 1224 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1225 WLAN_STA_AUTHORIZED);
05e5e883 1226
60f8b39c
JB		 1227 rates = 0;
1228 basic_rates = 0;
1229 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1230
60f8b39c
JB		 1231 for (i = 0; i < elems.supp_rates_len; i++) {
1232 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f709fc69 1233
60f8b39c
JB		 1234 if (rate > 110)
1235 have_higher_than_11mbit = true;
1236
1237 for (j = 0; j < sband->n_bitrates; j++) {
1238 if (sband->bitrates[j].bitrate == rate)
1239 rates |= BIT(j);
1240 if (elems.supp_rates[i] & 0x80)
1241 basic_rates |= BIT(j);
f709fc69 1242 }
f709fc69
LCC		 1243 }
1244
60f8b39c
JB		 1245 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1246 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82 1247
60f8b39c
JB		 1248 if (rate > 110)
1249 have_higher_than_11mbit = true;
f0706e82 1250
60f8b39c
JB		 1251 for (j = 0; j < sband->n_bitrates; j++) {
1252 if (sband->bitrates[j].bitrate == rate)
1253 rates |= BIT(j);
1254 if (elems.ext_supp_rates[i] & 0x80)
1255 basic_rates |= BIT(j);
1256 }
1ebebea8 1257 }
f0706e82 1258
60f8b39c
JB		 1259 sta->supp_rates[local->hw.conf.channel->band] = rates;
1260 sdata->basic_rates = basic_rates;
1261
1262 /* cf. IEEE 802.11 9.2.12 */
1263 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1264 have_higher_than_11mbit)
1265 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1266 else
1267 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1268
60f8b39c
JB		 1269 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1270 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1271 struct ieee80211_ht_bss_info bss_info;
1272 ieee80211_ht_cap_ie_to_ht_info(
1273 (struct ieee80211_ht_cap *)
1274 elems.ht_cap_elem, &sta->ht_info);
1275 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1276 (struct ieee80211_ht_addt_info *)
1277 elems.ht_info_elem, &bss_info);
1278 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
1279 }
f0706e82 1280
60f8b39c 1281 rate_control_rate_init(sta, local);
f0706e82 1282
60f8b39c
JB		 1283 if (elems.wmm_param) {
1284 set_sta_flags(sta, WLAN_STA_WME);
1285 rcu_read_unlock();
1286 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1287 elems.wmm_param_len);
1288 } else
1289 rcu_read_unlock();
f0706e82 1290
60f8b39c
JB		 1291 /* set AID and assoc capability,
1292 * ieee80211_set_associated() will tell the driver */
1293 bss_conf->aid = aid;
1294 bss_conf->assoc_capability = capab_info;
1295 ieee80211_set_associated(sdata, ifsta);
f0706e82 1296
60f8b39c 1297 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1298}
1299
1300
f698d856 1301static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a
BR		 1302 struct ieee80211_if_sta *ifsta,
1303 struct ieee80211_sta_bss *bss)
1304{
f698d856 1305 struct ieee80211_local *local = sdata->local;
a607268a
BR		 1306 int res, rates, i, j;
1307 struct sk_buff *skb;
1308 struct ieee80211_mgmt *mgmt;
a607268a 1309 u8 *pos;
a607268a 1310 struct ieee80211_supported_band *sband;
507b06d0 1311 union iwreq_data wrqu;
a607268a
BR		 1312
1313 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1314
1315 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1316 sta_info_flush_delayed(sdata);
a607268a
BR		 1317
1318 if (local->ops->reset_tsf) {
1319 /* Reset own TSF to allow time synchronization work. */
1320 local->ops->reset_tsf(local_to_hw(local));
1321 }
1322 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1323 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1324 if (res)
1325 return res;
1326
1327 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1328
a607268a
BR		 1329 sdata->drop_unencrypted = bss->capability &
1330 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1331
f698d856 1332 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1333
be038b37
AK		 1334 if (res)
1335 return res;
a607268a 1336
9d139c81 1337 /* Build IBSS probe response */
a607268a 1338 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 1339 if (skb) {
a607268a
BR		 1340 skb_reserve(skb, local->hw.extra_tx_headroom);
1341
1342 mgmt = (struct ieee80211_mgmt *)
1343 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1344 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 1345 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1346 IEEE80211_STYPE_PROBE_RESP);
a607268a 1347 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 1348 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 1349 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1350 mgmt->u.beacon.beacon_int =
1351 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 1352 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 1353 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1354
1355 pos = skb_put(skb, 2 + ifsta->ssid_len);
1356 *pos++ = WLAN_EID_SSID;
1357 *pos++ = ifsta->ssid_len;
1358 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1359
1360 rates = bss->supp_rates_len;
1361 if (rates > 8)
1362 rates = 8;
1363 pos = skb_put(skb, 2 + rates);
1364 *pos++ = WLAN_EID_SUPP_RATES;
1365 *pos++ = rates;
1366 memcpy(pos, bss->supp_rates, rates);
1367
1368 if (bss->band == IEEE80211_BAND_2GHZ) {
1369 pos = skb_put(skb, 2 + 1);
1370 *pos++ = WLAN_EID_DS_PARAMS;
1371 *pos++ = 1;
1372 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1373 }
1374
1375 pos = skb_put(skb, 2 + 2);
1376 *pos++ = WLAN_EID_IBSS_PARAMS;
1377 *pos++ = 2;
1378 /* FIX: set ATIM window based on scan results */
1379 *pos++ = 0;
1380 *pos++ = 0;
1381
1382 if (bss->supp_rates_len > 8) {
1383 rates = bss->supp_rates_len - 8;
1384 pos = skb_put(skb, 2 + rates);
1385 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1386 *pos++ = rates;
1387 memcpy(pos, &bss->supp_rates[8], rates);
1388 }
1389
9d139c81 1390 ifsta->probe_resp = skb;
e039fa4a 1391
9d139c81
JB		 1392 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1393 }
a607268a 1394
9d139c81
JB		 1395 rates = 0;
1396 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1397 for (i = 0; i < bss->supp_rates_len; i++) {
1398 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1399 for (j = 0; j < sband->n_bitrates; j++)
1400 if (sband->bitrates[j].bitrate == bitrate)
1401 rates |= BIT(j);
a607268a 1402 }
9d139c81
JB		 1403 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1404
b079ada7 1405 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1406
48c2fc59 1407 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1408 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1409
507b06d0
DW		 1410 memset(&wrqu, 0, sizeof(wrqu));
1411 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1412 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1413
1414 return res;
1415}
1416
f709fc69
LCC		 1417u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
1418 struct ieee802_11_elems *elems,
1419 enum ieee80211_band band)
1420{
1421 struct ieee80211_supported_band *sband;
1422 struct ieee80211_rate *bitrates;
1423 size_t num_rates;
1424 u64 supp_rates;
1425 int i, j;
1426 sband = local->hw.wiphy->bands[band];
1427
1428 if (!sband) {
1429 WARN_ON(1);
1430 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1431 }
1432
1433 bitrates = sband->bitrates;
1434 num_rates = sband->n_bitrates;
1435 supp_rates = 0;
1436 for (i = 0; i < elems->supp_rates_len +
1437 elems->ext_supp_rates_len; i++) {
1438 u8 rate = 0;
1439 int own_rate;
1440 if (i < elems->supp_rates_len)
1441 rate = elems->supp_rates[i];
1442 else if (elems->ext_supp_rates)
1443 rate = elems->ext_supp_rates
1444 [i - elems->supp_rates_len];
1445 own_rate = 5 * (rate & 0x7f);
1446 for (j = 0; j < num_rates; j++)
1447 if (bitrates[j].bitrate == own_rate)
1448 supp_rates |= BIT(j);
1449 }
1450 return supp_rates;
1451}
1452
8e1535d5
EG		 1453static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
1454 enum ieee80211_band band)
1455{
1456 struct ieee80211_supported_band *sband;
1457 struct ieee80211_rate *bitrates;
1458 u64 mandatory_rates;
1459 enum ieee80211_rate_flags mandatory_flag;
1460 int i;
1461
1462 sband = local->hw.wiphy->bands[band];
1463 if (!sband) {
1464 WARN_ON(1);
1465 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1466 }
1467
1468 if (band == IEEE80211_BAND_2GHZ)
1469 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1470 else
1471 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1472
1473 bitrates = sband->bitrates;
1474 mandatory_rates = 0;
1475 for (i = 0; i < sband->n_bitrates; i++)
1476 if (bitrates[i].flags & mandatory_flag)
1477 mandatory_rates |= BIT(i);
1478 return mandatory_rates;
1479}
a607268a 1480
98c8fccf
JB		 1481static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1482 struct ieee80211_mgmt *mgmt,
1483 size_t len,
1484 struct ieee80211_rx_status *rx_status,
1485 struct ieee802_11_elems *elems,
1486 bool beacon)
1487{
1488 struct ieee80211_local *local = sdata->local;
1489 int freq;
1490 struct ieee80211_sta_bss *bss;
1491 struct sta_info *sta;
1492 struct ieee80211_channel *channel;
1493 u64 beacon_timestamp, rx_timestamp;
1494 u64 supp_rates = 0;
1495 enum ieee80211_band band = rx_status->band;
1496 DECLARE_MAC_BUF(mac);
1497 DECLARE_MAC_BUF(mac2);
1498
1499 if (elems->ds_params && elems->ds_params_len == 1)
1500 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1501 else
1502 freq = rx_status->freq;
1503
1504 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1505
1506 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1507 return;
1508
98c8fccf
JB		 1509 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
1510 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1511 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1512
1513 rcu_read_lock();
1514
1515 sta = sta_info_get(local, mgmt->sa);
1516 if (sta) {
1517 u64 prev_rates;
1518
1519 prev_rates = sta->supp_rates[band];
1520 /* make sure mandatory rates are always added */
1521 sta->supp_rates[band] = supp_rates |
1522 ieee80211_sta_get_mandatory_rates(local, band);
1523
1524#ifdef CONFIG_MAC80211_IBSS_DEBUG
1525 if (sta->supp_rates[band] != prev_rates)
1526 printk(KERN_DEBUG "%s: updated supp_rates set "
1527 "for %s based on beacon info (0x%llx | "
1528 "0x%llx -> 0x%llx)\n",
1529 sdata->dev->name, print_mac(mac, sta->addr),
1530 (unsigned long long) prev_rates,
1531 (unsigned long long) supp_rates,
1532 (unsigned long long) sta->supp_rates[band]);
1533#endif
1534 } else {
1535 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1536 mgmt->sa, supp_rates);
1537 }
1538
1539 rcu_read_unlock();
1540 }
1541
1542 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1543 freq, beacon);
1544 if (!bss)
1545 return;
1546
1547 /* was just updated in ieee80211_bss_info_update */
1548 beacon_timestamp = bss->timestamp;
1549
30b89b0f
JB		 1550 /*
1551 * In STA mode, the remaining parameters should not be overridden
1552 * by beacons because they're not necessarily accurate there.
1553 */
1554 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
9859b81e 1555 bss->last_probe_resp && beacon) {
3e122be0 1556 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1557 return;
1558 }
1559
9d9bf77d
BR		 1560 /* check if we need to merge IBSS */
1561 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
fba4a1e6 1562 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1563 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1564 elems->ssid_len == sdata->u.sta.ssid_len &&
1565 memcmp(elems->ssid, sdata->u.sta.ssid,
1566 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1567 if (rx_status->flag & RX_FLAG_TSFT) {
1568 /* in order for correct IBSS merging we need mactime
1569 *
1570 * since mactime is defined as the time the first data
1571 * symbol of the frame hits the PHY, and the timestamp
1572 * of the beacon is defined as "the time that the data
1573 * symbol containing the first bit of the timestamp is
1574 * transmitted to the PHY plus the transmitting STA’s
1575 * delays through its local PHY from the MAC-PHY
1576 * interface to its interface with the WM"
1577 * (802.11 11.1.2) - equals the time this bit arrives at
1578 * the receiver - we have to take into account the
1579 * offset between the two.
1580 * e.g: at 1 MBit that means mactime is 192 usec earlier
1581 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1582 */
8e1535d5 1583 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 1584 bitrates[rx_status->rate_idx].bitrate;
1585 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1586 } else if (local && local->ops && local->ops->get_tsf)
1587 /* second best option: get current TSF */
1588 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1589 else
1590 /* can't merge without knowing the TSF */
1591 rx_timestamp = -1LLU;
1592#ifdef CONFIG_MAC80211_IBSS_DEBUG
1593 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1594 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1595 print_mac(mac, mgmt->sa),
1596 print_mac(mac2, mgmt->bssid),
1597 (unsigned long long)rx_timestamp,
1598 (unsigned long long)beacon_timestamp,
1599 (unsigned long long)(rx_timestamp - beacon_timestamp),
1600 jiffies);
1601#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1602 if (beacon_timestamp > rx_timestamp) {
576fdeae 1603#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 1604 printk(KERN_DEBUG "%s: beacon TSF higher than "
1605 "local TSF - IBSS merge with BSSID %s\n",
f698d856 1606 sdata->dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 1607#endif
f698d856
JBG		 1608 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1609 ieee80211_ibss_add_sta(sdata, NULL,
87291c02 1610 mgmt->bssid, mgmt->sa,
8e1535d5 1611 supp_rates);
9d9bf77d
BR		 1612 }
1613 }
1614
3e122be0 1615 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1616}
1617
1618
f698d856 1619static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1620 struct ieee80211_mgmt *mgmt,
1621 size_t len,
1622 struct ieee80211_rx_status *rx_status)
1623{
ae6a44e3
EK		 1624 size_t baselen;
1625 struct ieee802_11_elems elems;
9859b81e 1626 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1627
8e7cdbb6
TW		 1628 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1629 return; /* ignore ProbeResp to foreign address */
1630
ae6a44e3
EK		 1631 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1632 if (baselen > len)
1633 return;
1634
1635 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1636 &elems);
1637
98c8fccf 1638 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1639
1640 /* direct probe may be part of the association flow */
1641 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1642 &ifsta->request)) {
1643 printk(KERN_DEBUG "%s direct probe responded\n",
1644 sdata->dev->name);
1645 ieee80211_authenticate(sdata, ifsta);
1646 }
f0706e82
JB		 1647}
1648
1649
f698d856 1650static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1651 struct ieee80211_mgmt *mgmt,
1652 size_t len,
1653 struct ieee80211_rx_status *rx_status)
1654{
f0706e82 1655 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1656 size_t baselen;
1657 struct ieee802_11_elems elems;
f698d856 1658 struct ieee80211_local *local = sdata->local;
d3c990fb 1659 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 1660 u32 changed = 0;
f0706e82 1661
ae6a44e3
EK		 1662 /* Process beacon from the current BSS */
1663 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1664 if (baselen > len)
1665 return;
1666
1667 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1668
98c8fccf 1669 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1670
51fb61e7 1671 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 1672 return;
1673 ifsta = &sdata->u.sta;
1674
d6f2da5b 1675 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1676 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1677 return;
1678
fe3fa827
JB		 1679 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1680 elems.wmm_param_len);
1681
5628221c 1682 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 1683 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 1684 else {
1685 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
1686 changed |= ieee80211_handle_protect_preamb(sdata, false,
1687 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
1688 }
f0706e82 1689
d3c990fb 1690 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 1691 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 1692 struct ieee80211_ht_bss_info bss_info;
1693
1694 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1695 (struct ieee80211_ht_addt_info *)
1696 elems.ht_info_elem, &bss_info);
38668c05
TW		 1697 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
1698 &bss_info);
d3c990fb
RR		 1699 }
1700
471b3efd 1701 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1702}
1703
1704
f698d856 1705static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1706 struct ieee80211_if_sta *ifsta,
1707 struct ieee80211_mgmt *mgmt,
1708 size_t len,
1709 struct ieee80211_rx_status *rx_status)
1710{
f698d856 1711 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1712 int tx_last_beacon;
1713 struct sk_buff *skb;
1714 struct ieee80211_mgmt *resp;
1715 u8 *pos, *end;
0795af57
JP		 1716 DECLARE_MAC_BUF(mac);
1717#ifdef CONFIG_MAC80211_IBSS_DEBUG
1718 DECLARE_MAC_BUF(mac2);
1719 DECLARE_MAC_BUF(mac3);
1720#endif
f0706e82 1721
51fb61e7 1722 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
48c2fc59 1723 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 1724 len < 24 + 2 || !ifsta->probe_resp)
1725 return;
1726
1727 if (local->ops->tx_last_beacon)
1728 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1729 else
1730 tx_last_beacon = 1;
1731
1732#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1733 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1734 "%s (tx_last_beacon=%d)\n",
f698d856 1735 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
0795af57 1736 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 1737#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1738
1739 if (!tx_last_beacon)
1740 return;
1741
1742 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1743 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1744 return;
1745
1746 end = ((u8 *) mgmt) + len;
1747 pos = mgmt->u.probe_req.variable;
1748 if (pos[0] != WLAN_EID_SSID ||
1749 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 1750#ifdef CONFIG_MAC80211_IBSS_DEBUG
1751 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1752 "from %s\n",
f698d856 1753 sdata->dev->name, print_mac(mac, mgmt->sa));
f4ea83dd 1754#endif
f0706e82
JB		 1755 return;
1756 }
1757 if (pos[1] != 0 &&
1758 (pos[1] != ifsta->ssid_len ||
1759 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1760 /* Ignore ProbeReq for foreign SSID */
1761 return;
1762 }
1763
1764 /* Reply with ProbeResp */
0ec0b7ac 1765 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1766 if (!skb)
1767 return;
1768
1769 resp = (struct ieee80211_mgmt *) skb->data;
1770 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1771#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 1772 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
f698d856 1773 sdata->dev->name, print_mac(mac, resp->da));
f0706e82 1774#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 1775 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 1776}
1777
f698d856 1778void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 1779 struct ieee80211_rx_status *rx_status)
1780{
f698d856 1781 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1782 struct ieee80211_if_sta *ifsta;
1783 struct ieee80211_mgmt *mgmt;
1784 u16 fc;
1785
1786 if (skb->len < 24)
1787 goto fail;
1788
f0706e82
JB		 1789 ifsta = &sdata->u.sta;
1790
1791 mgmt = (struct ieee80211_mgmt *) skb->data;
1792 fc = le16_to_cpu(mgmt->frame_control);
1793
1794 switch (fc & IEEE80211_FCTL_STYPE) {
1795 case IEEE80211_STYPE_PROBE_REQ:
1796 case IEEE80211_STYPE_PROBE_RESP:
1797 case IEEE80211_STYPE_BEACON:
1798 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1799 case IEEE80211_STYPE_AUTH:
1800 case IEEE80211_STYPE_ASSOC_RESP:
1801 case IEEE80211_STYPE_REASSOC_RESP:
1802 case IEEE80211_STYPE_DEAUTH:
1803 case IEEE80211_STYPE_DISASSOC:
1804 skb_queue_tail(&ifsta->skb_queue, skb);
1805 queue_work(local->hw.workqueue, &ifsta->work);
1806 return;
f0706e82
JB		 1807 }
1808
1809 fail:
1810 kfree_skb(skb);
1811}
1812
f698d856 1813static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1814 struct sk_buff *skb)
1815{
1816 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 1817 struct ieee80211_if_sta *ifsta;
1818 struct ieee80211_mgmt *mgmt;
1819 u16 fc;
1820
f0706e82
JB		 1821 ifsta = &sdata->u.sta;
1822
1823 rx_status = (struct ieee80211_rx_status *) skb->cb;
1824 mgmt = (struct ieee80211_mgmt *) skb->data;
1825 fc = le16_to_cpu(mgmt->frame_control);
1826
1827 switch (fc & IEEE80211_FCTL_STYPE) {
1828 case IEEE80211_STYPE_PROBE_REQ:
f698d856 1829 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 1830 rx_status);
1831 break;
1832 case IEEE80211_STYPE_PROBE_RESP:
f698d856 1833 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1834 break;
1835 case IEEE80211_STYPE_BEACON:
f698d856 1836 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1837 break;
1838 case IEEE80211_STYPE_AUTH:
f698d856 1839 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1840 break;
1841 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 1842 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 1843 break;
1844 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 1845 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 1846 break;
1847 case IEEE80211_STYPE_DEAUTH:
f698d856 1848 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1849 break;
1850 case IEEE80211_STYPE_DISASSOC:
f698d856 1851 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1852 break;
1853 }
1854
1855 kfree_skb(skb);
1856}
1857
1858
f698d856 1859static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 1860{
f698d856 1861 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1862 int active = 0;
1863 struct sta_info *sta;
1864
d0709a65
JB		 1865 rcu_read_lock();
1866
1867 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1868 if (sta->sdata == sdata &&
f0706e82
JB		 1869 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1870 jiffies)) {
1871 active++;
1872 break;
1873 }
1874 }
d0709a65
JB		 1875
1876 rcu_read_unlock();
f0706e82
JB		 1877
1878 return active;
1879}
1880
1881
f698d856 1882static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1883 struct ieee80211_if_sta *ifsta)
1884{
1885 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1886
f698d856
JBG		 1887 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1888 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 1889 return;
1890
1891 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856
JBG		 1892 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1893 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1894}
1895
1896
1897void ieee80211_sta_timer(unsigned long data)
1898{
60f8b39c
JB		 1899 struct ieee80211_sub_if_data *sdata =
1900 (struct ieee80211_sub_if_data *) data;
1901 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1902 struct ieee80211_local *local = sdata->local;
f0706e82 1903
60f8b39c
JB		 1904 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1905 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 1906}
1907
f698d856 1908static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1909 struct ieee80211_if_sta *ifsta)
1910{
f698d856 1911 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1912
1913 if (local->ops->reset_tsf) {
1914 /* Reset own TSF to allow time synchronization work. */
1915 local->ops->reset_tsf(local_to_hw(local));
1916 }
1917
1918 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1919
1920
1921 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1922 ifsta->auth_alg = WLAN_AUTH_OPEN;
1923 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1924 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1925 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1926 ifsta->auth_alg = WLAN_AUTH_LEAP;
1927 else
1928 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 1929 ifsta->auth_transaction = -1;
d6f2da5b 1930 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 1931 ifsta->assoc_scan_tries = 0;
9859b81e 1932 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 1933 ifsta->auth_tries = 0;
1934 ifsta->assoc_tries = 0;
24e64622 1935 netif_tx_stop_all_queues(sdata->dev);
f698d856 1936 netif_carrier_off(sdata->dev);
f0706e82
JB		 1937}
1938
1939
f698d856 1940void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1941 struct ieee80211_if_sta *ifsta)
1942{
f698d856 1943 struct ieee80211_local *local = sdata->local;
f0706e82 1944
51fb61e7 1945 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 1946 return;
1947
d6f2da5b 1948 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3b7ee69d 1949 IEEE80211_STA_AUTO_BSSID_SEL)) &&
d6f2da5b 1950 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3b7ee69d
TW		 1951 IEEE80211_STA_AUTO_SSID_SEL))) {
1952
1953 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
1954 ieee80211_set_disassoc(sdata, ifsta, true, true,
1955 WLAN_REASON_DEAUTH_LEAVING);
1956
f0706e82
JB		 1957 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
1958 queue_work(local->hw.workqueue, &ifsta->work);
1959 }
1960}
1961
1962static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1963 const char *ssid, int ssid_len)
1964{
1965 int tmp, hidden_ssid;
1966
48225709
MW		 1967 if (ssid_len == ifsta->ssid_len &&
1968 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 1969 return 1;
1970
d6f2da5b 1971 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 1972 return 0;
1973
1974 hidden_ssid = 1;
1975 tmp = ssid_len;
1976 while (tmp--) {
1977 if (ssid[tmp] != '\0') {
1978 hidden_ssid = 0;
1979 break;
1980 }
1981 }
1982
1983 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1984 return 1;
1985
1986 if (ssid_len == 1 && ssid[0] == ' ')
1987 return 1;
1988
1989 return 0;
1990}
1991
f698d856 1992static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1993 struct ieee80211_if_sta *ifsta)
1994{
f698d856 1995 struct ieee80211_local *local = sdata->local;
f0706e82 1996 struct ieee80211_sta_bss *bss;
8318d78a 1997 struct ieee80211_supported_band *sband;
f0706e82
JB		 1998 u8 bssid[ETH_ALEN], *pos;
1999 int i;
167ad6f7 2000 int ret;
0795af57 2001 DECLARE_MAC_BUF(mac);
f0706e82
JB		 2002
2003#if 0
2004 /* Easier testing, use fixed BSSID. */
2005 memset(bssid, 0xfe, ETH_ALEN);
2006#else
2007 /* Generate random, not broadcast, locally administered BSSID. Mix in
2008 * own MAC address to make sure that devices that do not have proper
2009 * random number generator get different BSSID. */
2010 get_random_bytes(bssid, ETH_ALEN);
2011 for (i = 0; i < ETH_ALEN; i++)
f698d856 2012 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 2013 bssid[0] &= ~0x01;
2014 bssid[0] |= 0x02;
2015#endif
2016
0795af57 2017 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
f698d856 2018 sdata->dev->name, print_mac(mac, bssid));
f0706e82 2019
98c8fccf 2020 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2021 local->hw.conf.channel->center_freq,
cffdd30d 2022 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2023 if (!bss)
2024 return -ENOMEM;
2025
8318d78a
JB		 2026 bss->band = local->hw.conf.channel->band;
2027 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2028
2029 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2030 local->hw.conf.beacon_int = 100;
f0706e82 2031 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2032 bss->last_update = jiffies;
2033 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2034
2035 if (sdata->default_key)
f0706e82 2036 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2037 else
f0706e82 2038 sdata->drop_unencrypted = 0;
988c0f72 2039
8318d78a 2040 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2041 pos = bss->supp_rates;
8318d78a
JB		 2042 for (i = 0; i < sband->n_bitrates; i++) {
2043 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2044 *pos++ = (u8) (rate / 5);
2045 }
2046
f698d856 2047 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2048 ieee80211_rx_bss_put(local, bss);
167ad6f7 2049 return ret;
f0706e82
JB		 2050}
2051
2052
f698d856 2053static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2054 struct ieee80211_if_sta *ifsta)
2055{
f698d856 2056 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2057 struct ieee80211_sta_bss *bss;
2058 int found = 0;
2059 u8 bssid[ETH_ALEN];
2060 int active_ibss;
0795af57
JP		 2061 DECLARE_MAC_BUF(mac);
2062 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2063
2064 if (ifsta->ssid_len == 0)
2065 return -EINVAL;
2066
f698d856 2067 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2068#ifdef CONFIG_MAC80211_IBSS_DEBUG
2069 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2070 sdata->dev->name, active_ibss);
f0706e82
JB		 2071#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2072 spin_lock_bh(&local->sta_bss_lock);
2073 list_for_each_entry(bss, &local->sta_bss_list, list) {
2074 if (ifsta->ssid_len != bss->ssid_len ||
2075 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2076 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2077 continue;
2078#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2079 printk(KERN_DEBUG " bssid=%s found\n",
2080 print_mac(mac, bss->bssid));
f0706e82
JB		 2081#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2082 memcpy(bssid, bss->bssid, ETH_ALEN);
2083 found = 1;
2084 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2085 break;
2086 }
2087 spin_unlock_bh(&local->sta_bss_lock);
2088
2089#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 2090 if (found)
2091 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2092 "%s\n", print_mac(mac, bssid),
2093 print_mac(mac2, ifsta->bssid));
f0706e82 2094#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 2095
2096 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 2097 int ret;
80693ceb
DD		 2098 int search_freq;
2099
2100 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2101 search_freq = bss->freq;
2102 else
2103 search_freq = local->hw.conf.channel->center_freq;
2104
f698d856 2105 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2106 ifsta->ssid, ifsta->ssid_len);
2107 if (!bss)
2108 goto dont_join;
2109
0795af57 2110 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2111 " based on configured SSID\n",
f698d856
JBG		 2112 sdata->dev->name, print_mac(mac, bssid));
2113 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2114 ieee80211_rx_bss_put(local, bss);
167ad6f7 2115 return ret;
f0706e82 2116 }
80693ceb
DD		 2117
2118dont_join:
f0706e82
JB		 2119#ifdef CONFIG_MAC80211_IBSS_DEBUG
2120 printk(KERN_DEBUG " did not try to join ibss\n");
2121#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2122
2123 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2124 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2125 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2126 mod_timer(&ifsta->timer, jiffies +
2127 IEEE80211_IBSS_MERGE_INTERVAL);
2128 } else if (time_after(jiffies, local->last_scan_completed +
2129 IEEE80211_SCAN_INTERVAL)) {
2130 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856
JBG		 2131 "join\n", sdata->dev->name);
2132 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
f0706e82 2133 ifsta->ssid_len);
48c2fc59 2134 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2135 int interval = IEEE80211_SCAN_INTERVAL;
2136
2137 if (time_after(jiffies, ifsta->ibss_join_req +
2138 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2139 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2140 (!(local->oper_channel->flags &
2141 IEEE80211_CHAN_NO_IBSS)))
f698d856 2142 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2143 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2144 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2145 " %d MHz\n", sdata->dev->name,
8318d78a 2146 local->hw.conf.channel->center_freq);
f0706e82
JB		 2147 }
2148
2149 /* No IBSS found - decrease scan interval and continue
2150 * scanning. */
2151 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2152 }
2153
48c2fc59 2154 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2155 mod_timer(&ifsta->timer, jiffies + interval);
2156 return 0;
2157 }
2158
2159 return 0;
2160}
2161
2162
f698d856 2163int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
f0706e82 2164{
f0706e82 2165 struct ieee80211_if_sta *ifsta;
9d139c81 2166 int res;
f0706e82
JB		 2167
2168 if (len > IEEE80211_MAX_SSID_LEN)
2169 return -EINVAL;
2170
f0706e82
JB		 2171 ifsta = &sdata->u.sta;
2172
9d139c81
JB		 2173 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2174 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2175 memcpy(ifsta->ssid, ssid, len);
2176 ifsta->ssid_len = len;
d6f2da5b 2177 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
9d139c81
JB		 2178
2179 res = 0;
2180 /*
2181 * Hack! MLME code needs to be cleaned up to have different
2182 * entry points for configuration and internal selection change
2183 */
2184 if (netif_running(sdata->dev))
2185 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2186 if (res) {
2187 printk(KERN_DEBUG "%s: Failed to config new SSID to "
f698d856 2188 "the low-level driver\n", sdata->dev->name);
9d139c81
JB		 2189 return res;
2190 }
2191 }
f0706e82 2192
d6f2da5b
JS		 2193 if (len)
2194 ifsta->flags |= IEEE80211_STA_SSID_SET;
2195 else
2196 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
9d139c81 2197
51fb61e7 2198 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 2199 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82 2200 ifsta->ibss_join_req = jiffies;
48c2fc59 2201 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f698d856 2202 return ieee80211_sta_find_ibss(sdata, ifsta);
f0706e82 2203 }
9d139c81 2204
f0706e82
JB		 2205 return 0;
2206}
2207
2208
f698d856 2209int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
f0706e82 2210{
f0706e82
JB		 2211 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2212 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2213 *len = ifsta->ssid_len;
2214 return 0;
2215}
2216
2217
f698d856 2218int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
f0706e82 2219{
f0706e82
JB		 2220 struct ieee80211_if_sta *ifsta;
2221 int res;
2222
f0706e82
JB		 2223 ifsta = &sdata->u.sta;
2224
2225 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2226 memcpy(ifsta->bssid, bssid, ETH_ALEN);
9d139c81
JB		 2227 res = 0;
2228 /*
2229 * Hack! See also ieee80211_sta_set_ssid.
2230 */
2231 if (netif_running(sdata->dev))
2232 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
f0706e82
JB		 2233 if (res) {
2234 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
f698d856 2235 "the low-level driver\n", sdata->dev->name);
f0706e82
JB		 2236 return res;
2237 }
2238 }
2239
d6f2da5b
JS		 2240 if (is_valid_ether_addr(bssid))
2241 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 2242 else
d6f2da5b
JS		 2243 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2244
f0706e82
JB		 2245 return 0;
2246}
2247
2248
f698d856 2249int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
f0706e82 2250{
f0706e82 2251 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
988c0f72 2252
f0706e82
JB		 2253 kfree(ifsta->extra_ie);
2254 if (len == 0) {
2255 ifsta->extra_ie = NULL;
2256 ifsta->extra_ie_len = 0;
2257 return 0;
2258 }
2259 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2260 if (!ifsta->extra_ie) {
2261 ifsta->extra_ie_len = 0;
2262 return -ENOMEM;
2263 }
2264 memcpy(ifsta->extra_ie, ie, len);
2265 ifsta->extra_ie_len = len;
2266 return 0;
2267}
2268
2269
f698d856 2270struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 2271 struct sk_buff *skb, u8 *bssid,
87291c02 2272 u8 *addr, u64 supp_rates)
f0706e82 2273{
f698d856 2274 struct ieee80211_local *local = sdata->local;
f0706e82 2275 struct sta_info *sta;
0795af57 2276 DECLARE_MAC_BUF(mac);
87291c02 2277 int band = local->hw.conf.channel->band;
f0706e82
JB		 2278
2279 /* TODO: Could consider removing the least recently used entry and
2280 * allow new one to be added. */
2281 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2282 if (net_ratelimit()) {
2283 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
f698d856 2284 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
f0706e82
JB		 2285 }
2286 return NULL;
2287 }
2288
1e188637 2289 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2290 return NULL;
2291
f4ea83dd 2292#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 2293 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
f698d856 2294 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
f4ea83dd 2295#endif
f0706e82 2296
73651ee6
JB		 2297 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2298 if (!sta)
f0706e82
JB		 2299 return NULL;
2300
07346f81 2301 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2302
8e1535d5
EG		 2303 /* make sure mandatory rates are always added */
2304 sta->supp_rates[band] = supp_rates |
2305 ieee80211_sta_get_mandatory_rates(local, band);
f0706e82
JB		 2306
2307 rate_control_rate_init(sta, local);
2308
93e5deb1 2309 if (sta_info_insert(sta))
73651ee6 2310 return NULL;
73651ee6 2311
d0709a65 2312 return sta;
f0706e82
JB		 2313}
2314
2315
60f8b39c
JB		 2316static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2317 struct ieee80211_if_sta *ifsta)
2318{
2319 struct ieee80211_local *local = sdata->local;
2320 struct ieee80211_sta_bss *bss, *selected = NULL;
2321 int top_rssi = 0, freq;
2322
2323 spin_lock_bh(&local->sta_bss_lock);
2324 freq = local->oper_channel->center_freq;
2325 list_for_each_entry(bss, &local->sta_bss_list, list) {
2326 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2327 continue;
2328
2329 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2330 IEEE80211_STA_AUTO_BSSID_SEL |
2331 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2332 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2333 !!sdata->default_key))
2334 continue;
2335
2336 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2337 bss->freq != freq)
2338 continue;
2339
2340 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2341 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2342 continue;
2343
2344 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2345 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2346 continue;
2347
2348 if (!selected || top_rssi < bss->signal) {
2349 selected = bss;
2350 top_rssi = bss->signal;
2351 }
2352 }
2353 if (selected)
2354 atomic_inc(&selected->users);
2355 spin_unlock_bh(&local->sta_bss_lock);
2356
2357 if (selected) {
2358 ieee80211_set_freq(sdata, selected->freq);
2359 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2360 ieee80211_sta_set_ssid(sdata, selected->ssid,
2361 selected->ssid_len);
2362 ieee80211_sta_set_bssid(sdata, selected->bssid);
b079ada7 2363 ieee80211_sta_def_wmm_params(sdata, selected);
60f8b39c
JB		 2364
2365 /* Send out direct probe if no probe resp was received or
2366 * the one we have is outdated
2367 */
2368 if (!selected->last_probe_resp ||
2369 time_after(jiffies, selected->last_probe_resp
2370 + IEEE80211_SCAN_RESULT_EXPIRE))
2371 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2372 else
2373 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2374
2375 ieee80211_rx_bss_put(local, selected);
2376 ieee80211_sta_reset_auth(sdata, ifsta);
2377 return 0;
2378 } else {
2379 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2380 ifsta->assoc_scan_tries++;
2381 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2382 ieee80211_sta_start_scan(sdata, NULL, 0);
2383 else
2384 ieee80211_sta_start_scan(sdata, ifsta->ssid,
2385 ifsta->ssid_len);
2386 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2387 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2388 } else
2389 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2390 }
2391 return -1;
2392}
2393
2394
f698d856 2395int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2396{
f0706e82
JB		 2397 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2398
f4ea83dd 2399 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2400 sdata->dev->name, reason);
f0706e82 2401
51fb61e7
JB		 2402 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2403 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 2404 return -EINVAL;
2405
aa458d17 2406 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2407 return 0;
2408}
2409
2410
f698d856 2411int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2412{
f0706e82
JB		 2413 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2414
f4ea83dd 2415 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2416 sdata->dev->name, reason);
f0706e82 2417
51fb61e7 2418 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2419 return -EINVAL;
2420
d6f2da5b 2421 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2422 return -1;
2423
aa458d17 2424 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2425 return 0;
2426}
84363e6e
MA		 2427
2428void ieee80211_notify_mac(struct ieee80211_hw *hw,
2429 enum ieee80211_notification_types notif_type)
2430{
2431 struct ieee80211_local *local = hw_to_local(hw);
2432 struct ieee80211_sub_if_data *sdata;
2433
2434 switch (notif_type) {
2435 case IEEE80211_NOTIFY_RE_ASSOC:
2436 rcu_read_lock();
2437 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3e122be0
JB		 2438 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2439 continue;
84363e6e 2440
f698d856 2441 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
84363e6e
MA		 2442 }
2443 rcu_read_unlock();
2444 break;
2445 }
2446}
2447EXPORT_SYMBOL(ieee80211_notify_mac);
60f8b39c
JB		 2448
2449void ieee80211_sta_work(struct work_struct *work)
2450{
2451 struct ieee80211_sub_if_data *sdata =
2452 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2453 struct ieee80211_local *local = sdata->local;
2454 struct ieee80211_if_sta *ifsta;
2455 struct sk_buff *skb;
2456
2457 if (!netif_running(sdata->dev))
2458 return;
2459
2460 if (local->sta_sw_scanning || local->sta_hw_scanning)
2461 return;
2462
2463 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
472dbc45 2464 sdata->vif.type != IEEE80211_IF_TYPE_IBSS))
60f8b39c
JB		 2465 return;
2466 ifsta = &sdata->u.sta;
2467
2468 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2469 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2470
60f8b39c
JB		 2471 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2472 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2473 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2474 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0fe8b33 2475 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
60f8b39c
JB		 2476 return;
2477 }
2478
2479 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2480 if (ieee80211_sta_config_auth(sdata, ifsta))
2481 return;
2482 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2483 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2484 return;
2485
2486 switch (ifsta->state) {
2487 case IEEE80211_STA_MLME_DISABLED:
2488 break;
2489 case IEEE80211_STA_MLME_DIRECT_PROBE:
2490 ieee80211_direct_probe(sdata, ifsta);
2491 break;
2492 case IEEE80211_STA_MLME_AUTHENTICATE:
2493 ieee80211_authenticate(sdata, ifsta);
2494 break;
2495 case IEEE80211_STA_MLME_ASSOCIATE:
2496 ieee80211_associate(sdata, ifsta);
2497 break;
2498 case IEEE80211_STA_MLME_ASSOCIATED:
2499 ieee80211_associated(sdata, ifsta);
2500 break;
2501 case IEEE80211_STA_MLME_IBSS_SEARCH:
2502 ieee80211_sta_find_ibss(sdata, ifsta);
2503 break;
2504 case IEEE80211_STA_MLME_IBSS_JOINED:
2505 ieee80211_sta_merge_ibss(sdata, ifsta);
2506 break;
60f8b39c
JB		 2507 default:
2508 WARN_ON(1);
2509 break;
2510 }
2511
2512 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2513 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2514 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2515
2516 ieee80211_set_disassoc(sdata, ifsta, false, true,
2517 WLAN_REASON_UNSPECIFIED);
2518 }
2519}
0a51b27e 2520
a1678f84
JB		 2521static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2522{
472dbc45 2523 if (sdata->vif.type == IEEE80211_IF_TYPE_STA)
7c950695
JB		 2524 queue_work(sdata->local->hw.workqueue,
2525 &sdata->u.sta.work);
a1678f84
JB		 2526}
2527
0a51b27e
JB		 2528void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2529{
2530 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2531 struct ieee80211_if_sta *ifsta;
2532
5bc75728 2533 if (sdata && sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
0a51b27e
JB		 2534 ifsta = &sdata->u.sta;
2535 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2536 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2537 !ieee80211_sta_active_ibss(sdata)))
2538 ieee80211_sta_find_ibss(sdata, ifsta);
2539 }
a1678f84
JB		 2540
2541 /* Restart STA timers */
2542 rcu_read_lock();
2543 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2544 ieee80211_restart_sta_timer(sdata);
2545 rcu_read_unlock();
0a51b27e 2546}
kernel source for telekom puls (alcatel/mediatek)