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p54: honour bss_info_changed's short slot time settings
[mirror_ubuntu-zesty-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
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
c2b13452 55static u8 *ieee80211_bss_get_ie(struct ieee80211_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
c2b13452 75static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90
JB		 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
9c6bd790
JB		 96/* also used by mesh code */
97u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
98 struct ieee802_11_elems *elems,
99 enum ieee80211_band band)
60f8b39c 100{
9c6bd790
JB		 101 struct ieee80211_supported_band *sband;
102 struct ieee80211_rate *bitrates;
103 size_t num_rates;
104 u64 supp_rates;
105 int i, j;
106 sband = local->hw.wiphy->bands[band];
60f8b39c 107
9c6bd790
JB		 108 if (!sband) {
109 WARN_ON(1);
110 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
60f8b39c 111 }
60f8b39c 112
9c6bd790
JB		 113 bitrates = sband->bitrates;
114 num_rates = sband->n_bitrates;
115 supp_rates = 0;
116 for (i = 0; i < elems->supp_rates_len +
117 elems->ext_supp_rates_len; i++) {
118 u8 rate = 0;
119 int own_rate;
120 if (i < elems->supp_rates_len)
121 rate = elems->supp_rates[i];
122 else if (elems->ext_supp_rates)
123 rate = elems->ext_supp_rates
124 [i - elems->supp_rates_len];
125 own_rate = 5 * (rate & 0x7f);
126 for (j = 0; j < num_rates; j++)
127 if (bitrates[j].bitrate == own_rate)
128 supp_rates |= BIT(j);
129 }
130 return supp_rates;
60f8b39c
JB		 131}
132
9c6bd790
JB		 133/* frame sending functions */
134
135/* also used by scanning code */
0a51b27e
JB		 136void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
137 u8 *ssid, size_t ssid_len)
60f8b39c
JB		 138{
139 struct ieee80211_local *local = sdata->local;
140 struct ieee80211_supported_band *sband;
141 struct sk_buff *skb;
142 struct ieee80211_mgmt *mgmt;
143 u8 *pos, *supp_rates, *esupp_rates = NULL;
144 int i;
145
146 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
147 if (!skb) {
148 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
149 "request\n", sdata->dev->name);
150 return;
151 }
152 skb_reserve(skb, local->hw.extra_tx_headroom);
153
154 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
155 memset(mgmt, 0, 24);
156 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
157 IEEE80211_STYPE_PROBE_REQ);
158 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
159 if (dst) {
160 memcpy(mgmt->da, dst, ETH_ALEN);
161 memcpy(mgmt->bssid, dst, ETH_ALEN);
162 } else {
163 memset(mgmt->da, 0xff, ETH_ALEN);
164 memset(mgmt->bssid, 0xff, ETH_ALEN);
165 }
166 pos = skb_put(skb, 2 + ssid_len);
167 *pos++ = WLAN_EID_SSID;
168 *pos++ = ssid_len;
169 memcpy(pos, ssid, ssid_len);
170
171 supp_rates = skb_put(skb, 2);
172 supp_rates[0] = WLAN_EID_SUPP_RATES;
173 supp_rates[1] = 0;
174 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
175
176 for (i = 0; i < sband->n_bitrates; i++) {
177 struct ieee80211_rate *rate = &sband->bitrates[i];
178 if (esupp_rates) {
179 pos = skb_put(skb, 1);
180 esupp_rates[1]++;
181 } else if (supp_rates[1] == 8) {
182 esupp_rates = skb_put(skb, 3);
183 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
184 esupp_rates[1] = 1;
185 pos = &esupp_rates[2];
186 } else {
187 pos = skb_put(skb, 1);
188 supp_rates[1]++;
189 }
190 *pos = rate->bitrate / 5;
191 }
192
e50db65c 193 ieee80211_tx_skb(sdata, skb, 0);
60f8b39c
JB		 194}
195
9c6bd790
JB		 196static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
197 struct ieee80211_if_sta *ifsta,
198 int transaction, u8 *extra, size_t extra_len,
199 int encrypt)
200{
201 struct ieee80211_local *local = sdata->local;
202 struct sk_buff *skb;
203 struct ieee80211_mgmt *mgmt;
204
205 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
206 sizeof(*mgmt) + 6 + extra_len);
207 if (!skb) {
208 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
209 "frame\n", sdata->dev->name);
210 return;
211 }
212 skb_reserve(skb, local->hw.extra_tx_headroom);
213
214 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
215 memset(mgmt, 0, 24 + 6);
216 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
217 IEEE80211_STYPE_AUTH);
218 if (encrypt)
219 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
220 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
221 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
222 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
223 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
224 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
225 ifsta->auth_transaction = transaction + 1;
226 mgmt->u.auth.status_code = cpu_to_le16(0);
227 if (extra)
228 memcpy(skb_put(skb, extra_len), extra, extra_len);
229
230 ieee80211_tx_skb(sdata, skb, encrypt);
231}
232
9ac19a90
JB		 233static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
234 struct ieee80211_if_sta *ifsta)
235{
236 struct ieee80211_local *local = sdata->local;
237 struct sk_buff *skb;
238 struct ieee80211_mgmt *mgmt;
239 u8 *pos, *ies, *ht_add_ie;
240 int i, len, count, rates_len, supp_rates_len;
241 u16 capab;
c2b13452 242 struct ieee80211_bss *bss;
9ac19a90
JB		 243 int wmm = 0;
244 struct ieee80211_supported_band *sband;
245 u64 rates = 0;
246
247 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
248 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
249 ifsta->ssid_len);
250 if (!skb) {
251 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
252 "frame\n", sdata->dev->name);
253 return;
254 }
255 skb_reserve(skb, local->hw.extra_tx_headroom);
256
257 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
258
259 capab = ifsta->capab;
260
261 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
262 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
263 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
264 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
265 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
266 }
267
268 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
269 local->hw.conf.channel->center_freq,
270 ifsta->ssid, ifsta->ssid_len);
271 if (bss) {
272 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
273 capab |= WLAN_CAPABILITY_PRIVACY;
274 if (bss->wmm_used)
275 wmm = 1;
276
277 /* get all rates supported by the device and the AP as
278 * some APs don't like getting a superset of their rates
279 * in the association request (e.g. D-Link DAP 1353 in
280 * b-only mode) */
281 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
282
283 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
284 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
285 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
286
287 ieee80211_rx_bss_put(local, bss);
288 } else {
289 rates = ~0;
290 rates_len = sband->n_bitrates;
291 }
292
293 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
294 memset(mgmt, 0, 24);
295 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
296 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
297 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
298
299 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
300 skb_put(skb, 10);
301 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
302 IEEE80211_STYPE_REASSOC_REQ);
303 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
304 mgmt->u.reassoc_req.listen_interval =
305 cpu_to_le16(local->hw.conf.listen_interval);
306 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
307 ETH_ALEN);
308 } else {
309 skb_put(skb, 4);
310 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
311 IEEE80211_STYPE_ASSOC_REQ);
312 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
313 mgmt->u.reassoc_req.listen_interval =
314 cpu_to_le16(local->hw.conf.listen_interval);
315 }
316
317 /* SSID */
318 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
319 *pos++ = WLAN_EID_SSID;
320 *pos++ = ifsta->ssid_len;
321 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
322
323 /* add all rates which were marked to be used above */
324 supp_rates_len = rates_len;
325 if (supp_rates_len > 8)
326 supp_rates_len = 8;
327
328 len = sband->n_bitrates;
329 pos = skb_put(skb, supp_rates_len + 2);
330 *pos++ = WLAN_EID_SUPP_RATES;
331 *pos++ = supp_rates_len;
332
333 count = 0;
334 for (i = 0; i < sband->n_bitrates; i++) {
335 if (BIT(i) & rates) {
336 int rate = sband->bitrates[i].bitrate;
337 *pos++ = (u8) (rate / 5);
338 if (++count == 8)
339 break;
340 }
341 }
342
343 if (rates_len > count) {
344 pos = skb_put(skb, rates_len - count + 2);
345 *pos++ = WLAN_EID_EXT_SUPP_RATES;
346 *pos++ = rates_len - count;
347
348 for (i++; i < sband->n_bitrates; i++) {
349 if (BIT(i) & rates) {
350 int rate = sband->bitrates[i].bitrate;
351 *pos++ = (u8) (rate / 5);
352 }
353 }
354 }
355
356 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
357 /* 1. power capabilities */
358 pos = skb_put(skb, 4);
359 *pos++ = WLAN_EID_PWR_CAPABILITY;
360 *pos++ = 2;
361 *pos++ = 0; /* min tx power */
362 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
363
364 /* 2. supported channels */
365 /* TODO: get this in reg domain format */
366 pos = skb_put(skb, 2 * sband->n_channels + 2);
367 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
368 *pos++ = 2 * sband->n_channels;
369 for (i = 0; i < sband->n_channels; i++) {
370 *pos++ = ieee80211_frequency_to_channel(
371 sband->channels[i].center_freq);
372 *pos++ = 1; /* one channel in the subband*/
373 }
374 }
375
376 if (ifsta->extra_ie) {
377 pos = skb_put(skb, ifsta->extra_ie_len);
378 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
379 }
380
381 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
382 pos = skb_put(skb, 9);
383 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
384 *pos++ = 7; /* len */
385 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
386 *pos++ = 0x50;
387 *pos++ = 0xf2;
388 *pos++ = 2; /* WME */
389 *pos++ = 0; /* WME info */
390 *pos++ = 1; /* WME ver */
391 *pos++ = 0;
392 }
393
394 /* wmm support is a must to HT */
395 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
396 sband->ht_info.ht_supported &&
397 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
398 struct ieee80211_ht_addt_info *ht_add_info =
399 (struct ieee80211_ht_addt_info *)ht_add_ie;
400 u16 cap = sband->ht_info.cap;
401 __le16 tmp;
402 u32 flags = local->hw.conf.channel->flags;
403
404 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
405 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
406 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
407 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
408 cap &= ~IEEE80211_HT_CAP_SGI_40;
409 }
410 break;
411 case IEEE80211_HT_IE_CHA_SEC_BELOW:
412 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
413 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
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 */
427 *pos++ = sband->ht_info.ampdu_factor |
428 (sband->ht_info.ampdu_density << 2);
429 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
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{
471b3efd 574 struct ieee80211_bss_conf *bss_conf = &sdata->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,
f5e5bf25 702 struct ieee80211_if_sta *ifsta)
f0706e82 703{
471b3efd 704 struct ieee80211_local *local = sdata->local;
38668c05 705 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
471b3efd 706 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 707
c2b13452 708 struct ieee80211_bss *bss;
d6f2da5b 709
f5e5bf25 710 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 711
05c914fe 712 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f5e5bf25 713 return;
21c0cbe7 714
f5e5bf25
TW		 715 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
716 conf->channel->center_freq,
717 ifsta->ssid, ifsta->ssid_len);
718 if (bss) {
719 /* set timing information */
720 sdata->bss_conf.beacon_int = bss->beacon_int;
721 sdata->bss_conf.timestamp = bss->timestamp;
722 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 723
7a5158ef
JB		 724 changed |= ieee80211_handle_bss_capability(sdata,
725 bss->capability, bss->has_erp_value, bss->erp_value);
9ac19a90
JB		 726
727 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 728 }
729
9ac19a90
JB		 730 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
731 changed |= BSS_CHANGED_HT;
732 sdata->bss_conf.assoc_ht = 1;
733 sdata->bss_conf.ht_conf = &conf->ht_conf;
734 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
f0706e82 735 }
3434fbd3 736
9ac19a90
JB		 737 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
738 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
739 ieee80211_sta_send_associnfo(sdata, ifsta);
9306102e 740
9ac19a90
JB		 741 ifsta->last_probe = jiffies;
742 ieee80211_led_assoc(local, 1);
9306102e 743
9ac19a90 744 sdata->bss_conf.assoc = 1;
96dd22ac
JB		 745 /*
746 * For now just always ask the driver to update the basic rateset
747 * when we have associated, we aren't checking whether it actually
748 * changed or not.
749 */
750 changed |= BSS_CHANGED_BASIC_RATES;
9ac19a90 751 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82 752
9ac19a90
JB		 753 netif_tx_start_all_queues(sdata->dev);
754 netif_carrier_on(sdata->dev);
f0706e82 755
9ac19a90 756 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 757}
758
9ac19a90
JB		 759static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
760 struct ieee80211_if_sta *ifsta)
f0706e82 761{
9ac19a90
JB		 762 ifsta->direct_probe_tries++;
763 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26
JB		 764 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
765 sdata->dev->name, ifsta->bssid);
9ac19a90 766 ifsta->state = IEEE80211_STA_MLME_DISABLED;
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;
f0706e82
JB		 797 return;
798 }
f0706e82 799
9ac19a90 800 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26
JB		 801 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
802 sdata->dev->name, ifsta->bssid);
f0706e82 803
9ac19a90
JB		 804 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
805
806 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 807}
808
aa458d17
TW		 809static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
810 struct ieee80211_if_sta *ifsta, bool deauth,
811 bool self_disconnected, u16 reason)
812{
813 struct ieee80211_local *local = sdata->local;
814 struct sta_info *sta;
f5e5bf25 815 u32 changed = BSS_CHANGED_ASSOC;
aa458d17
TW		 816
817 rcu_read_lock();
818
819 sta = sta_info_get(local, ifsta->bssid);
820 if (!sta) {
821 rcu_read_unlock();
822 return;
823 }
824
825 if (deauth) {
826 ifsta->direct_probe_tries = 0;
827 ifsta->auth_tries = 0;
828 }
829 ifsta->assoc_scan_tries = 0;
830 ifsta->assoc_tries = 0;
831
24e64622 832 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 833 netif_carrier_off(sdata->dev);
834
17741cdc 835 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
aa458d17
TW		 836
837 if (self_disconnected) {
838 if (deauth)
ef422bc0
JB		 839 ieee80211_send_deauth_disassoc(sdata,
840 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 841 else
ef422bc0
JB		 842 ieee80211_send_deauth_disassoc(sdata,
843 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 844 }
845
f5e5bf25
TW		 846 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
847 changed |= ieee80211_reset_erp_info(sdata);
848
849 if (sdata->bss_conf.assoc_ht)
850 changed |= BSS_CHANGED_HT;
851
852 sdata->bss_conf.assoc_ht = 0;
853 sdata->bss_conf.ht_conf = NULL;
854 sdata->bss_conf.ht_bss_conf = NULL;
855
856 ieee80211_led_assoc(local, 0);
857 sdata->bss_conf.assoc = 0;
858
859 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17
TW		 860
861 if (self_disconnected)
862 ifsta->state = IEEE80211_STA_MLME_DISABLED;
863
864 sta_info_unlink(&sta);
865
866 rcu_read_unlock();
867
868 sta_info_destroy(sta);
869}
f0706e82 870
9ac19a90
JB		 871static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
872{
873 if (!sdata || !sdata->default_key ||
874 sdata->default_key->conf.alg != ALG_WEP)
875 return 0;
876 return 1;
877}
878
f698d856 879static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 880 struct ieee80211_if_sta *ifsta)
881{
f698d856 882 struct ieee80211_local *local = sdata->local;
c2b13452 883 struct ieee80211_bss *bss;
5b98b1f7
JB		 884 int bss_privacy;
885 int wep_privacy;
886 int privacy_invoked;
f0706e82 887
5b98b1f7 888 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 889 return 0;
890
f698d856 891 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 892 local->hw.conf.channel->center_freq,
cffdd30d 893 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 894 if (!bss)
895 return 0;
896
5b98b1f7 897 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 898 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 899 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 900
3e122be0 901 ieee80211_rx_bss_put(local, bss);
f0706e82 902
5b98b1f7
JB		 903 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
904 return 0;
905
906 return 1;
f0706e82
JB		 907}
908
f698d856 909static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 910 struct ieee80211_if_sta *ifsta)
911{
912 ifsta->assoc_tries++;
913 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 914 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 915 " timed out\n",
0c68ae26 916 sdata->dev->name, ifsta->bssid);
48c2fc59 917 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 918 return;
919 }
920
48c2fc59 921 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26
JB		 922 printk(KERN_DEBUG "%s: associate with AP %pM\n",
923 sdata->dev->name, ifsta->bssid);
f698d856 924 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 925 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 926 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 927 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 928 return;
929 }
930
f698d856 931 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 932
933 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
934}
935
936
f698d856 937static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 938 struct ieee80211_if_sta *ifsta)
939{
f698d856 940 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 941 struct sta_info *sta;
942 int disassoc;
943
944 /* TODO: start monitoring current AP signal quality and number of
945 * missed beacons. Scan other channels every now and then and search
946 * for better APs. */
947 /* TODO: remove expired BSSes */
948
48c2fc59 949 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 950
d0709a65
JB		 951 rcu_read_lock();
952
f0706e82
JB		 953 sta = sta_info_get(local, ifsta->bssid);
954 if (!sta) {
0c68ae26
JB		 955 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
956 sdata->dev->name, ifsta->bssid);
f0706e82
JB		 957 disassoc = 1;
958 } else {
959 disassoc = 0;
960 if (time_after(jiffies,
961 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 962 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 963 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 964 "current AP %pM - assume out of "
f0706e82 965 "range\n",
0c68ae26 966 sdata->dev->name, ifsta->bssid);
f0706e82 967 disassoc = 1;
d6f2da5b 968 } else
f698d856 969 ieee80211_send_probe_req(sdata, ifsta->bssid,
4dfe51e1
JB		 970 ifsta->ssid,
971 ifsta->ssid_len);
d6f2da5b 972 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 973 } else {
d6f2da5b 974 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 975 if (time_after(jiffies, ifsta->last_probe +
976 IEEE80211_PROBE_INTERVAL)) {
977 ifsta->last_probe = jiffies;
f698d856 978 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 979 ifsta->ssid,
980 ifsta->ssid_len);
981 }
982 }
f0706e82 983 }
d0709a65
JB		 984
985 rcu_read_unlock();
986
60f8b39c
JB		 987 if (disassoc)
988 ieee80211_set_disassoc(sdata, ifsta, true, true,
989 WLAN_REASON_PREV_AUTH_NOT_VALID);
990 else
991 mod_timer(&ifsta->timer, jiffies +
992 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 993}
994
995
f698d856 996static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 997 struct ieee80211_if_sta *ifsta)
998{
f698d856 999 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1000 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1001 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1002}
1003
1004
f698d856 1005static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1006 struct ieee80211_if_sta *ifsta,
1007 struct ieee80211_mgmt *mgmt,
1008 size_t len)
1009{
1010 u8 *pos;
1011 struct ieee802_11_elems elems;
1012
f0706e82 1013 pos = mgmt->u.auth.variable;
67a4cce4 1014 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1015 if (!elems.challenge)
f0706e82 1016 return;
f698d856 1017 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1018 elems.challenge_len + 2, 1);
1019}
1020
f698d856 1021static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1022 struct ieee80211_if_sta *ifsta,
1023 struct ieee80211_mgmt *mgmt,
1024 size_t len)
1025{
f0706e82
JB		 1026 u16 auth_alg, auth_transaction, status_code;
1027
48c2fc59 1028 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
05c914fe 1029 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82 1030 return;
f0706e82 1031
f4ea83dd 1032 if (len < 24 + 6)
f0706e82 1033 return;
f0706e82 1034
05c914fe 1035 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1036 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1037 return;
f0706e82 1038
05c914fe 1039 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1040 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1041 return;
f0706e82
JB		 1042
1043 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1044 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1045 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1046
05c914fe 1047 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
135a2110
JB		 1048 /*
1049 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1050 * networks and most implementations do not seem to use it.
1051 * However, try to reply to authentication attempts if someone
1052 * has actually implemented this.
135a2110 1053 */
f4ea83dd 1054 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1055 return;
f698d856 1056 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1057 }
1058
1059 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1060 auth_transaction != ifsta->auth_transaction)
f0706e82 1061 return;
f0706e82
JB		 1062
1063 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1064 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1065 u8 algs[3];
1066 const int num_algs = ARRAY_SIZE(algs);
1067 int i, pos;
1068 algs[0] = algs[1] = algs[2] = 0xff;
1069 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1070 algs[0] = WLAN_AUTH_OPEN;
1071 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1072 algs[1] = WLAN_AUTH_SHARED_KEY;
1073 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1074 algs[2] = WLAN_AUTH_LEAP;
1075 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1076 pos = 0;
1077 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1078 pos = 1;
1079 else
1080 pos = 2;
1081 for (i = 0; i < num_algs; i++) {
1082 pos++;
1083 if (pos >= num_algs)
1084 pos = 0;
1085 if (algs[pos] == ifsta->auth_alg ||
1086 algs[pos] == 0xff)
1087 continue;
1088 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1089 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1090 continue;
1091 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1092 break;
1093 }
1094 }
1095 return;
1096 }
1097
1098 switch (ifsta->auth_alg) {
1099 case WLAN_AUTH_OPEN:
1100 case WLAN_AUTH_LEAP:
f698d856 1101 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1102 break;
1103 case WLAN_AUTH_SHARED_KEY:
1104 if (ifsta->auth_transaction == 4)
f698d856 1105 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1106 else
f698d856 1107 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1108 break;
1109 }
1110}
1111
1112
f698d856 1113static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1114 struct ieee80211_if_sta *ifsta,
1115 struct ieee80211_mgmt *mgmt,
1116 size_t len)
1117{
1118 u16 reason_code;
1119
f4ea83dd 1120 if (len < 24 + 2)
f0706e82 1121 return;
f0706e82 1122
f4ea83dd 1123 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1124 return;
f0706e82
JB		 1125
1126 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1127
988c0f72 1128 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 1129 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 1130
48c2fc59
TW		 1131 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1132 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1133 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1134 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1135 mod_timer(&ifsta->timer, jiffies +
1136 IEEE80211_RETRY_AUTH_INTERVAL);
1137 }
1138
aa458d17 1139 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1140 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1141}
1142
1143
f698d856 1144static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1145 struct ieee80211_if_sta *ifsta,
1146 struct ieee80211_mgmt *mgmt,
1147 size_t len)
1148{
1149 u16 reason_code;
1150
f4ea83dd 1151 if (len < 24 + 2)
f0706e82 1152 return;
f0706e82 1153
f4ea83dd 1154 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1155 return;
f0706e82
JB		 1156
1157 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1158
d6f2da5b 1159 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 1160 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 1161
48c2fc59
TW		 1162 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1163 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1164 mod_timer(&ifsta->timer, jiffies +
1165 IEEE80211_RETRY_AUTH_INTERVAL);
1166 }
1167
aa458d17 1168 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
f0706e82
JB		 1169}
1170
1171
471b3efd 1172static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1173 struct ieee80211_if_sta *ifsta,
1174 struct ieee80211_mgmt *mgmt,
1175 size_t len,
1176 int reassoc)
1177{
471b3efd 1178 struct ieee80211_local *local = sdata->local;
8318d78a 1179 struct ieee80211_supported_band *sband;
f0706e82 1180 struct sta_info *sta;
8318d78a 1181 u64 rates, basic_rates;
f0706e82
JB		 1182 u16 capab_info, status_code, aid;
1183 struct ieee802_11_elems elems;
471b3efd 1184 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1185 u8 *pos;
1186 int i, j;
8318d78a 1187 bool have_higher_than_11mbit = false;
f0706e82
JB		 1188
1189 /* AssocResp and ReassocResp have identical structure, so process both
1190 * of them in this function. */
1191
48c2fc59 1192 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1193 return;
f0706e82 1194
f4ea83dd 1195 if (len < 24 + 6)
f0706e82 1196 return;
f0706e82 1197
f4ea83dd 1198 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1199 return;
f0706e82
JB		 1200
1201 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1202 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1203 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1204
0c68ae26 1205 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1206 "status=%d aid=%d)\n",
0c68ae26 1207 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1208 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1209
1210 if (status_code != WLAN_STATUS_SUCCESS) {
1211 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1212 sdata->dev->name, status_code);
8a69aa93
DD		 1213 /* if this was a reassociation, ensure we try a "full"
1214 * association next time. This works around some broken APs
1215 * which do not correctly reject reassociation requests. */
d6f2da5b 1216 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1217 return;
1218 }
1219
1dd84aa2
JB		 1220 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1221 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1222 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1223 aid &= ~(BIT(15) | BIT(14));
1224
f0706e82 1225 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1226 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1227
1228 if (!elems.supp_rates) {
1229 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1230 sdata->dev->name);
f0706e82
JB		 1231 return;
1232 }
1233
f698d856 1234 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1235 ifsta->aid = aid;
1236 ifsta->ap_capab = capab_info;
1237
1238 kfree(ifsta->assocresp_ies);
1239 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1240 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1241 if (ifsta->assocresp_ies)
1242 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1243
d0709a65
JB		 1244 rcu_read_lock();
1245
f0706e82
JB		 1246 /* Add STA entry for the AP */
1247 sta = sta_info_get(local, ifsta->bssid);
1248 if (!sta) {
c2b13452 1249 struct ieee80211_bss *bss;
73651ee6 1250 int err;
d0709a65 1251
73651ee6
JB		 1252 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1253 if (!sta) {
1254 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1255 " the AP\n", sdata->dev->name);
d0709a65 1256 rcu_read_unlock();
f0706e82
JB		 1257 return;
1258 }
60f8b39c
JB		 1259 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1260 local->hw.conf.channel->center_freq,
1261 ifsta->ssid, ifsta->ssid_len);
1262 if (bss) {
1263 sta->last_signal = bss->signal;
1264 sta->last_qual = bss->qual;
1265 sta->last_noise = bss->noise;
1266 ieee80211_rx_bss_put(local, bss);
1267 }
f709fc69 1268
60f8b39c
JB		 1269 err = sta_info_insert(sta);
1270 if (err) {
1271 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1272 " the AP (error %d)\n", sdata->dev->name, err);
1273 rcu_read_unlock();
1274 return;
f709fc69 1275 }
60f8b39c
JB		 1276 /* update new sta with its last rx activity */
1277 sta->last_rx = jiffies;
f709fc69 1278 }
f709fc69 1279
60f8b39c
JB		 1280 /*
1281 * FIXME: Do we really need to update the sta_info's information here?
1282 * We already know about the AP (we found it in our list) so it
1283 * should already be filled with the right info, no?
1284 * As is stands, all this is racy because typically we assume
1285 * the information that is filled in here (except flags) doesn't
1286 * change while a STA structure is alive. As such, it should move
1287 * to between the sta_info_alloc() and sta_info_insert() above.
1288 */
f709fc69 1289
60f8b39c
JB		 1290 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1291 WLAN_STA_AUTHORIZED);
05e5e883 1292
60f8b39c
JB		 1293 rates = 0;
1294 basic_rates = 0;
1295 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1296
60f8b39c
JB		 1297 for (i = 0; i < elems.supp_rates_len; i++) {
1298 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f709fc69 1299
60f8b39c
JB		 1300 if (rate > 110)
1301 have_higher_than_11mbit = true;
1302
1303 for (j = 0; j < sband->n_bitrates; j++) {
1304 if (sband->bitrates[j].bitrate == rate)
1305 rates |= BIT(j);
1306 if (elems.supp_rates[i] & 0x80)
1307 basic_rates |= BIT(j);
f709fc69 1308 }
f709fc69
LCC		 1309 }
1310
60f8b39c
JB		 1311 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1312 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82 1313
60f8b39c
JB		 1314 if (rate > 110)
1315 have_higher_than_11mbit = true;
f0706e82 1316
60f8b39c
JB		 1317 for (j = 0; j < sband->n_bitrates; j++) {
1318 if (sband->bitrates[j].bitrate == rate)
1319 rates |= BIT(j);
1320 if (elems.ext_supp_rates[i] & 0x80)
1321 basic_rates |= BIT(j);
1322 }
1ebebea8 1323 }
f0706e82 1324
323ce79a 1325 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
96dd22ac 1326 sdata->bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1327
1328 /* cf. IEEE 802.11 9.2.12 */
1329 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1330 have_higher_than_11mbit)
1331 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1332 else
1333 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1334
60f8b39c
JB		 1335 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1336 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1337 struct ieee80211_ht_bss_info bss_info;
1338 ieee80211_ht_cap_ie_to_ht_info(
687c7c08 1339 elems.ht_cap_elem, &sta->sta.ht_info);
60f8b39c 1340 ieee80211_ht_addt_info_ie_to_ht_bss_info(
60f8b39c 1341 elems.ht_info_elem, &bss_info);
687c7c08 1342 ieee80211_handle_ht(local, 1, &sta->sta.ht_info, &bss_info);
60f8b39c 1343 }
f0706e82 1344
4b7679a5 1345 rate_control_rate_init(sta);
f0706e82 1346
60f8b39c
JB		 1347 if (elems.wmm_param) {
1348 set_sta_flags(sta, WLAN_STA_WME);
1349 rcu_read_unlock();
1350 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1351 elems.wmm_param_len);
1352 } else
1353 rcu_read_unlock();
f0706e82 1354
60f8b39c
JB		 1355 /* set AID and assoc capability,
1356 * ieee80211_set_associated() will tell the driver */
1357 bss_conf->aid = aid;
1358 bss_conf->assoc_capability = capab_info;
1359 ieee80211_set_associated(sdata, ifsta);
f0706e82 1360
60f8b39c 1361 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1362}
1363
1364
f698d856 1365static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a 1366 struct ieee80211_if_sta *ifsta,
c2b13452 1367 struct ieee80211_bss *bss)
a607268a 1368{
f698d856 1369 struct ieee80211_local *local = sdata->local;
a607268a
BR		 1370 int res, rates, i, j;
1371 struct sk_buff *skb;
1372 struct ieee80211_mgmt *mgmt;
a607268a 1373 u8 *pos;
a607268a 1374 struct ieee80211_supported_band *sband;
507b06d0 1375 union iwreq_data wrqu;
a607268a
BR		 1376
1377 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1378
1379 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1380 sta_info_flush_delayed(sdata);
a607268a
BR		 1381
1382 if (local->ops->reset_tsf) {
1383 /* Reset own TSF to allow time synchronization work. */
1384 local->ops->reset_tsf(local_to_hw(local));
1385 }
1386 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1387 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1388 if (res)
1389 return res;
1390
1391 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1392
a607268a
BR		 1393 sdata->drop_unencrypted = bss->capability &
1394 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1395
f698d856 1396 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1397
be038b37
AK		 1398 if (res)
1399 return res;
a607268a 1400
9d139c81 1401 /* Build IBSS probe response */
a607268a 1402 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 1403 if (skb) {
a607268a
BR		 1404 skb_reserve(skb, local->hw.extra_tx_headroom);
1405
1406 mgmt = (struct ieee80211_mgmt *)
1407 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1408 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 1409 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1410 IEEE80211_STYPE_PROBE_RESP);
a607268a 1411 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 1412 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 1413 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1414 mgmt->u.beacon.beacon_int =
1415 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 1416 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 1417 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1418
1419 pos = skb_put(skb, 2 + ifsta->ssid_len);
1420 *pos++ = WLAN_EID_SSID;
1421 *pos++ = ifsta->ssid_len;
1422 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1423
1424 rates = bss->supp_rates_len;
1425 if (rates > 8)
1426 rates = 8;
1427 pos = skb_put(skb, 2 + rates);
1428 *pos++ = WLAN_EID_SUPP_RATES;
1429 *pos++ = rates;
1430 memcpy(pos, bss->supp_rates, rates);
1431
1432 if (bss->band == IEEE80211_BAND_2GHZ) {
1433 pos = skb_put(skb, 2 + 1);
1434 *pos++ = WLAN_EID_DS_PARAMS;
1435 *pos++ = 1;
1436 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1437 }
1438
1439 pos = skb_put(skb, 2 + 2);
1440 *pos++ = WLAN_EID_IBSS_PARAMS;
1441 *pos++ = 2;
1442 /* FIX: set ATIM window based on scan results */
1443 *pos++ = 0;
1444 *pos++ = 0;
1445
1446 if (bss->supp_rates_len > 8) {
1447 rates = bss->supp_rates_len - 8;
1448 pos = skb_put(skb, 2 + rates);
1449 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1450 *pos++ = rates;
1451 memcpy(pos, &bss->supp_rates[8], rates);
1452 }
1453
9d139c81 1454 ifsta->probe_resp = skb;
e039fa4a 1455
9d139c81
JB		 1456 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1457 }
a607268a 1458
9d139c81
JB		 1459 rates = 0;
1460 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1461 for (i = 0; i < bss->supp_rates_len; i++) {
1462 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1463 for (j = 0; j < sband->n_bitrates; j++)
1464 if (sband->bitrates[j].bitrate == bitrate)
1465 rates |= BIT(j);
a607268a 1466 }
9d139c81
JB		 1467 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1468
b079ada7 1469 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1470
48c2fc59 1471 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1472 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1473
4492bea6
EG		 1474 ieee80211_led_assoc(local, true);
1475
507b06d0
DW		 1476 memset(&wrqu, 0, sizeof(wrqu));
1477 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1478 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1479
1480 return res;
1481}
1482
98c8fccf
JB		 1483static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1484 struct ieee80211_mgmt *mgmt,
1485 size_t len,
1486 struct ieee80211_rx_status *rx_status,
1487 struct ieee802_11_elems *elems,
1488 bool beacon)
1489{
1490 struct ieee80211_local *local = sdata->local;
1491 int freq;
c2b13452 1492 struct ieee80211_bss *bss;
98c8fccf
JB		 1493 struct sta_info *sta;
1494 struct ieee80211_channel *channel;
1495 u64 beacon_timestamp, rx_timestamp;
1496 u64 supp_rates = 0;
1497 enum ieee80211_band band = rx_status->band;
98c8fccf
JB		 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
05c914fe 1509 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
98c8fccf
JB		 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
323ce79a 1519 prev_rates = sta->sta.supp_rates[band];
98c8fccf 1520 /* make sure mandatory rates are always added */
323ce79a 1521 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 1522 ieee80211_mandatory_rates(local, band);
98c8fccf
JB		 1523
1524#ifdef CONFIG_MAC80211_IBSS_DEBUG
323ce79a 1525 if (sta->sta.supp_rates[band] != prev_rates)
98c8fccf 1526 printk(KERN_DEBUG "%s: updated supp_rates set "
0c68ae26 1527 "for %pM based on beacon info (0x%llx | "
98c8fccf 1528 "0x%llx -> 0x%llx)\n",
17741cdc 1529 sdata->dev->name,
0c68ae26 1530 sta->sta.addr,
98c8fccf
JB		 1531 (unsigned long long) prev_rates,
1532 (unsigned long long) supp_rates,
323ce79a 1533 (unsigned long long) sta->sta.supp_rates[band]);
98c8fccf
JB		 1534#endif
1535 } else {
1536 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1537 mgmt->sa, supp_rates);
1538 }
1539
1540 rcu_read_unlock();
1541 }
1542
1543 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1544 freq, beacon);
1545 if (!bss)
1546 return;
1547
1548 /* was just updated in ieee80211_bss_info_update */
1549 beacon_timestamp = bss->timestamp;
1550
30b89b0f
JB		 1551 /*
1552 * In STA mode, the remaining parameters should not be overridden
1553 * by beacons because they're not necessarily accurate there.
1554 */
05c914fe 1555 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
9859b81e 1556 bss->last_probe_resp && beacon) {
3e122be0 1557 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1558 return;
1559 }
1560
9d9bf77d 1561 /* check if we need to merge IBSS */
05c914fe 1562 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
fba4a1e6 1563 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1564 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1565 elems->ssid_len == sdata->u.sta.ssid_len &&
1566 memcmp(elems->ssid, sdata->u.sta.ssid,
1567 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1568 if (rx_status->flag & RX_FLAG_TSFT) {
1569 /* in order for correct IBSS merging we need mactime
1570 *
1571 * since mactime is defined as the time the first data
1572 * symbol of the frame hits the PHY, and the timestamp
1573 * of the beacon is defined as "the time that the data
1574 * symbol containing the first bit of the timestamp is
1575 * transmitted to the PHY plus the transmitting STA’s
1576 * delays through its local PHY from the MAC-PHY
1577 * interface to its interface with the WM"
1578 * (802.11 11.1.2) - equals the time this bit arrives at
1579 * the receiver - we have to take into account the
1580 * offset between the two.
1581 * e.g: at 1 MBit that means mactime is 192 usec earlier
1582 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1583 */
8e1535d5 1584 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 1585 bitrates[rx_status->rate_idx].bitrate;
1586 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1587 } else if (local && local->ops && local->ops->get_tsf)
1588 /* second best option: get current TSF */
1589 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1590 else
1591 /* can't merge without knowing the TSF */
1592 rx_timestamp = -1LLU;
1593#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1594 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1595 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1596 mgmt->sa, mgmt->bssid,
9d9bf77d
BR		 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 1604 printk(KERN_DEBUG "%s: beacon TSF higher than "
0c68ae26
JB		 1605 "local TSF - IBSS merge with BSSID %pM\n",
1606 sdata->dev->name, 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;
7a5158ef
JB		 1661 bool erp_valid;
1662 u8 erp_value = 0;
f0706e82 1663
ae6a44e3
EK		 1664 /* Process beacon from the current BSS */
1665 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1666 if (baselen > len)
1667 return;
1668
1669 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1670
98c8fccf 1671 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1672
05c914fe 1673 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1674 return;
1675 ifsta = &sdata->u.sta;
1676
d6f2da5b 1677 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1678 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1679 return;
1680
fe3fa827
JB		 1681 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1682 elems.wmm_param_len);
1683
7a5158ef
JB		 1684
1685 if (elems.erp_info && elems.erp_info_len >= 1) {
1686 erp_valid = true;
1687 erp_value = elems.erp_info[0];
1688 } else {
1689 erp_valid = false;
50c4afb9 1690 }
7a5158ef
JB		 1691 changed |= ieee80211_handle_bss_capability(sdata,
1692 le16_to_cpu(mgmt->u.beacon.capab_info),
1693 erp_valid, erp_value);
f0706e82 1694
d3c990fb 1695 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 1696 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 1697 struct ieee80211_ht_bss_info bss_info;
1698
1699 ieee80211_ht_addt_info_ie_to_ht_bss_info(
d3c990fb 1700 elems.ht_info_elem, &bss_info);
38668c05
TW		 1701 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
1702 &bss_info);
d3c990fb
RR		 1703 }
1704
471b3efd 1705 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1706}
1707
1708
f698d856 1709static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1710 struct ieee80211_if_sta *ifsta,
1711 struct ieee80211_mgmt *mgmt,
1712 size_t len,
1713 struct ieee80211_rx_status *rx_status)
1714{
f698d856 1715 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1716 int tx_last_beacon;
1717 struct sk_buff *skb;
1718 struct ieee80211_mgmt *resp;
1719 u8 *pos, *end;
1720
05c914fe 1721 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
48c2fc59 1722 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 1723 len < 24 + 2 || !ifsta->probe_resp)
1724 return;
1725
1726 if (local->ops->tx_last_beacon)
1727 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1728 else
1729 tx_last_beacon = 1;
1730
1731#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1732 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1733 " (tx_last_beacon=%d)\n",
1734 sdata->dev->name, mgmt->sa, mgmt->da,
1735 mgmt->bssid, tx_last_beacon);
f0706e82
JB		 1736#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1737
1738 if (!tx_last_beacon)
1739 return;
1740
1741 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1742 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1743 return;
1744
1745 end = ((u8 *) mgmt) + len;
1746 pos = mgmt->u.probe_req.variable;
1747 if (pos[0] != WLAN_EID_SSID ||
1748 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 1749#ifdef CONFIG_MAC80211_IBSS_DEBUG
1750 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0c68ae26
JB		 1751 "from %pM\n",
1752 sdata->dev->name, mgmt->sa);
f4ea83dd 1753#endif
f0706e82
JB		 1754 return;
1755 }
1756 if (pos[1] != 0 &&
1757 (pos[1] != ifsta->ssid_len ||
1758 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1759 /* Ignore ProbeReq for foreign SSID */
1760 return;
1761 }
1762
1763 /* Reply with ProbeResp */
0ec0b7ac 1764 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1765 if (!skb)
1766 return;
1767
1768 resp = (struct ieee80211_mgmt *) skb->data;
1769 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1770#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1771 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1772 sdata->dev->name, resp->da);
f0706e82 1773#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 1774 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 1775}
1776
f698d856 1777void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 1778 struct ieee80211_rx_status *rx_status)
1779{
f698d856 1780 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1781 struct ieee80211_if_sta *ifsta;
1782 struct ieee80211_mgmt *mgmt;
1783 u16 fc;
1784
1785 if (skb->len < 24)
1786 goto fail;
1787
f0706e82
JB		 1788 ifsta = &sdata->u.sta;
1789
1790 mgmt = (struct ieee80211_mgmt *) skb->data;
1791 fc = le16_to_cpu(mgmt->frame_control);
1792
1793 switch (fc & IEEE80211_FCTL_STYPE) {
1794 case IEEE80211_STYPE_PROBE_REQ:
1795 case IEEE80211_STYPE_PROBE_RESP:
1796 case IEEE80211_STYPE_BEACON:
1797 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1798 case IEEE80211_STYPE_AUTH:
1799 case IEEE80211_STYPE_ASSOC_RESP:
1800 case IEEE80211_STYPE_REASSOC_RESP:
1801 case IEEE80211_STYPE_DEAUTH:
1802 case IEEE80211_STYPE_DISASSOC:
1803 skb_queue_tail(&ifsta->skb_queue, skb);
1804 queue_work(local->hw.workqueue, &ifsta->work);
1805 return;
f0706e82
JB		 1806 }
1807
1808 fail:
1809 kfree_skb(skb);
1810}
1811
f698d856 1812static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1813 struct sk_buff *skb)
1814{
1815 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 1816 struct ieee80211_if_sta *ifsta;
1817 struct ieee80211_mgmt *mgmt;
1818 u16 fc;
1819
f0706e82
JB		 1820 ifsta = &sdata->u.sta;
1821
1822 rx_status = (struct ieee80211_rx_status *) skb->cb;
1823 mgmt = (struct ieee80211_mgmt *) skb->data;
1824 fc = le16_to_cpu(mgmt->frame_control);
1825
1826 switch (fc & IEEE80211_FCTL_STYPE) {
1827 case IEEE80211_STYPE_PROBE_REQ:
f698d856 1828 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 1829 rx_status);
1830 break;
1831 case IEEE80211_STYPE_PROBE_RESP:
f698d856 1832 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1833 break;
1834 case IEEE80211_STYPE_BEACON:
f698d856 1835 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1836 break;
1837 case IEEE80211_STYPE_AUTH:
f698d856 1838 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1839 break;
1840 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 1841 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 1842 break;
1843 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 1844 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 1845 break;
1846 case IEEE80211_STYPE_DEAUTH:
f698d856 1847 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1848 break;
1849 case IEEE80211_STYPE_DISASSOC:
f698d856 1850 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1851 break;
1852 }
1853
1854 kfree_skb(skb);
1855}
1856
1857
f698d856 1858static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 1859{
f698d856 1860 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1861 int active = 0;
1862 struct sta_info *sta;
1863
d0709a65
JB		 1864 rcu_read_lock();
1865
1866 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1867 if (sta->sdata == sdata &&
f0706e82
JB		 1868 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1869 jiffies)) {
1870 active++;
1871 break;
1872 }
1873 }
d0709a65
JB		 1874
1875 rcu_read_unlock();
f0706e82
JB		 1876
1877 return active;
1878}
1879
1880
f698d856 1881static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1882 struct ieee80211_if_sta *ifsta)
1883{
1884 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1885
f698d856
JBG		 1886 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1887 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 1888 return;
1889
1890 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 1891 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
c2b13452 1892 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1893}
1894
1895
9c6bd790 1896static void ieee80211_sta_timer(unsigned long data)
f0706e82 1897{
60f8b39c
JB		 1898 struct ieee80211_sub_if_data *sdata =
1899 (struct ieee80211_sub_if_data *) data;
1900 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1901 struct ieee80211_local *local = sdata->local;
f0706e82 1902
60f8b39c
JB		 1903 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1904 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 1905}
1906
f698d856 1907static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1908 struct ieee80211_if_sta *ifsta)
1909{
f698d856 1910 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1911
1912 if (local->ops->reset_tsf) {
1913 /* Reset own TSF to allow time synchronization work. */
1914 local->ops->reset_tsf(local_to_hw(local));
1915 }
1916
1917 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1918
1919
1920 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1921 ifsta->auth_alg = WLAN_AUTH_OPEN;
1922 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1923 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1924 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1925 ifsta->auth_alg = WLAN_AUTH_LEAP;
1926 else
1927 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 1928 ifsta->auth_transaction = -1;
d6f2da5b 1929 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 1930 ifsta->assoc_scan_tries = 0;
9859b81e 1931 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 1932 ifsta->auth_tries = 0;
1933 ifsta->assoc_tries = 0;
24e64622 1934 netif_tx_stop_all_queues(sdata->dev);
f698d856 1935 netif_carrier_off(sdata->dev);
f0706e82
JB		 1936}
1937
1938
f0706e82
JB		 1939static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1940 const char *ssid, int ssid_len)
1941{
1942 int tmp, hidden_ssid;
1943
48225709
MW		 1944 if (ssid_len == ifsta->ssid_len &&
1945 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 1946 return 1;
1947
d6f2da5b 1948 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 1949 return 0;
1950
1951 hidden_ssid = 1;
1952 tmp = ssid_len;
1953 while (tmp--) {
1954 if (ssid[tmp] != '\0') {
1955 hidden_ssid = 0;
1956 break;
1957 }
1958 }
1959
1960 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1961 return 1;
1962
1963 if (ssid_len == 1 && ssid[0] == ' ')
1964 return 1;
1965
1966 return 0;
1967}
1968
f698d856 1969static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1970 struct ieee80211_if_sta *ifsta)
1971{
f698d856 1972 struct ieee80211_local *local = sdata->local;
c2b13452 1973 struct ieee80211_bss *bss;
8318d78a 1974 struct ieee80211_supported_band *sband;
f0706e82
JB		 1975 u8 bssid[ETH_ALEN], *pos;
1976 int i;
167ad6f7 1977 int ret;
f0706e82
JB		 1978
1979#if 0
1980 /* Easier testing, use fixed BSSID. */
1981 memset(bssid, 0xfe, ETH_ALEN);
1982#else
1983 /* Generate random, not broadcast, locally administered BSSID. Mix in
1984 * own MAC address to make sure that devices that do not have proper
1985 * random number generator get different BSSID. */
1986 get_random_bytes(bssid, ETH_ALEN);
1987 for (i = 0; i < ETH_ALEN; i++)
f698d856 1988 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 1989 bssid[0] &= ~0x01;
1990 bssid[0] |= 0x02;
1991#endif
1992
0c68ae26
JB		 1993 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
1994 sdata->dev->name, bssid);
f0706e82 1995
98c8fccf 1996 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 1997 local->hw.conf.channel->center_freq,
cffdd30d 1998 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 1999 if (!bss)
2000 return -ENOMEM;
2001
8318d78a
JB		 2002 bss->band = local->hw.conf.channel->band;
2003 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2004
2005 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2006 local->hw.conf.beacon_int = 100;
f0706e82 2007 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2008 bss->last_update = jiffies;
2009 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2010
2011 if (sdata->default_key)
f0706e82 2012 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2013 else
f0706e82 2014 sdata->drop_unencrypted = 0;
988c0f72 2015
8318d78a 2016 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2017 pos = bss->supp_rates;
8318d78a
JB		 2018 for (i = 0; i < sband->n_bitrates; i++) {
2019 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2020 *pos++ = (u8) (rate / 5);
2021 }
2022
f698d856 2023 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2024 ieee80211_rx_bss_put(local, bss);
167ad6f7 2025 return ret;
f0706e82
JB		 2026}
2027
2028
f698d856 2029static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2030 struct ieee80211_if_sta *ifsta)
2031{
f698d856 2032 struct ieee80211_local *local = sdata->local;
c2b13452 2033 struct ieee80211_bss *bss;
f0706e82
JB		 2034 int found = 0;
2035 u8 bssid[ETH_ALEN];
2036 int active_ibss;
2037
2038 if (ifsta->ssid_len == 0)
2039 return -EINVAL;
2040
f698d856 2041 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2042#ifdef CONFIG_MAC80211_IBSS_DEBUG
2043 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2044 sdata->dev->name, active_ibss);
f0706e82 2045#endif /* CONFIG_MAC80211_IBSS_DEBUG */
c2b13452
JB		 2046 spin_lock_bh(&local->bss_lock);
2047 list_for_each_entry(bss, &local->bss_list, list) {
f0706e82
JB		 2048 if (ifsta->ssid_len != bss->ssid_len ||
2049 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2050 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2051 continue;
2052#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26 2053 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
f0706e82
JB		 2054#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2055 memcpy(bssid, bss->bssid, ETH_ALEN);
2056 found = 1;
2057 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2058 break;
2059 }
c2b13452 2060 spin_unlock_bh(&local->bss_lock);
f0706e82
JB		 2061
2062#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b 2063 if (found)
0c68ae26
JB		 2064 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2065 "%pM\n", bssid, ifsta->bssid);
f0706e82 2066#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 2067
2068 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 2069 int ret;
80693ceb
DD		 2070 int search_freq;
2071
2072 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2073 search_freq = bss->freq;
2074 else
2075 search_freq = local->hw.conf.channel->center_freq;
2076
f698d856 2077 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2078 ifsta->ssid, ifsta->ssid_len);
2079 if (!bss)
2080 goto dont_join;
2081
0c68ae26 2082 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
f0706e82 2083 " based on configured SSID\n",
0c68ae26 2084 sdata->dev->name, bssid);
f698d856 2085 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2086 ieee80211_rx_bss_put(local, bss);
167ad6f7 2087 return ret;
f0706e82 2088 }
80693ceb
DD		 2089
2090dont_join:
f0706e82
JB		 2091#ifdef CONFIG_MAC80211_IBSS_DEBUG
2092 printk(KERN_DEBUG " did not try to join ibss\n");
2093#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2094
2095 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2096 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2097 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2098 mod_timer(&ifsta->timer, jiffies +
2099 IEEE80211_IBSS_MERGE_INTERVAL);
2100 } else if (time_after(jiffies, local->last_scan_completed +
2101 IEEE80211_SCAN_INTERVAL)) {
2102 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2103 "join\n", sdata->dev->name);
c2b13452 2104 return ieee80211_request_scan(sdata, ifsta->ssid,
f0706e82 2105 ifsta->ssid_len);
48c2fc59 2106 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2107 int interval = IEEE80211_SCAN_INTERVAL;
2108
2109 if (time_after(jiffies, ifsta->ibss_join_req +
2110 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2111 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2112 (!(local->oper_channel->flags &
2113 IEEE80211_CHAN_NO_IBSS)))
f698d856 2114 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2115 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2116 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2117 " %d MHz\n", sdata->dev->name,
8318d78a 2118 local->hw.conf.channel->center_freq);
f0706e82
JB		 2119 }
2120
2121 /* No IBSS found - decrease scan interval and continue
2122 * scanning. */
2123 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2124 }
2125
48c2fc59 2126 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2127 mod_timer(&ifsta->timer, jiffies + interval);
2128 return 0;
2129 }
2130
2131 return 0;
2132}
2133
2134
9c6bd790
JB		 2135static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2136 struct ieee80211_if_sta *ifsta)
f0706e82 2137{
9c6bd790 2138 struct ieee80211_local *local = sdata->local;
c2b13452 2139 struct ieee80211_bss *bss, *selected = NULL;
9c6bd790 2140 int top_rssi = 0, freq;
f0706e82 2141
c2b13452 2142 spin_lock_bh(&local->bss_lock);
9c6bd790 2143 freq = local->oper_channel->center_freq;
c2b13452 2144 list_for_each_entry(bss, &local->bss_list, list) {
9c6bd790
JB		 2145 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2146 continue;
f0706e82 2147
9c6bd790
JB		 2148 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2149 IEEE80211_STA_AUTO_BSSID_SEL |
2150 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2151 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2152 !!sdata->default_key))
2153 continue;
f0706e82 2154
9c6bd790
JB		 2155 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2156 bss->freq != freq)
2157 continue;
9d139c81 2158
9c6bd790
JB		 2159 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2160 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2161 continue;
f0706e82 2162
9c6bd790
JB		 2163 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2164 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2165 continue;
9d139c81 2166
9c6bd790
JB		 2167 if (!selected || top_rssi < bss->signal) {
2168 selected = bss;
2169 top_rssi = bss->signal;
2170 }
f0706e82 2171 }
9c6bd790
JB		 2172 if (selected)
2173 atomic_inc(&selected->users);
c2b13452 2174 spin_unlock_bh(&local->bss_lock);
9d139c81 2175
9c6bd790
JB		 2176 if (selected) {
2177 ieee80211_set_freq(sdata, selected->freq);
2178 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2179 ieee80211_sta_set_ssid(sdata, selected->ssid,
2180 selected->ssid_len);
2181 ieee80211_sta_set_bssid(sdata, selected->bssid);
2182 ieee80211_sta_def_wmm_params(sdata, selected);
f0706e82 2183
9c6bd790
JB		 2184 /* Send out direct probe if no probe resp was received or
2185 * the one we have is outdated
2186 */
2187 if (!selected->last_probe_resp ||
2188 time_after(jiffies, selected->last_probe_resp
2189 + IEEE80211_SCAN_RESULT_EXPIRE))
2190 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2191 else
2192 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2193
9c6bd790
JB		 2194 ieee80211_rx_bss_put(local, selected);
2195 ieee80211_sta_reset_auth(sdata, ifsta);
2196 return 0;
2197 } else {
2198 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2199 ifsta->assoc_scan_tries++;
2200 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
c2b13452 2201 ieee80211_start_scan(sdata, NULL, 0);
9c6bd790 2202 else
c2b13452 2203 ieee80211_start_scan(sdata, ifsta->ssid,
9c6bd790
JB		 2204 ifsta->ssid_len);
2205 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2206 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2207 } else
2208 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2209 }
2210 return -1;
2211}
2212
2213
2214static void ieee80211_sta_work(struct work_struct *work)
2215{
2216 struct ieee80211_sub_if_data *sdata =
2217 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2218 struct ieee80211_local *local = sdata->local;
2219 struct ieee80211_if_sta *ifsta;
2220 struct sk_buff *skb;
2221
2222 if (!netif_running(sdata->dev))
2223 return;
2224
c2b13452 2225 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2226 return;
2227
05c914fe
JB		 2228 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2229 sdata->vif.type != NL80211_IFTYPE_ADHOC))
9c6bd790 2230 return;
f0706e82
JB		 2231 ifsta = &sdata->u.sta;
2232
9c6bd790
JB		 2233 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2234 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2235
2236 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2237 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2238 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2239 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
c2b13452
JB		 2240 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2241 ifsta->scan_ssid_len);
9c6bd790 2242 return;
f0706e82
JB		 2243 }
2244
9c6bd790
JB		 2245 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2246 if (ieee80211_sta_config_auth(sdata, ifsta))
2247 return;
2248 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2249 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2250 return;
d6f2da5b 2251
9c6bd790
JB		 2252 switch (ifsta->state) {
2253 case IEEE80211_STA_MLME_DISABLED:
2254 break;
2255 case IEEE80211_STA_MLME_DIRECT_PROBE:
2256 ieee80211_direct_probe(sdata, ifsta);
2257 break;
2258 case IEEE80211_STA_MLME_AUTHENTICATE:
2259 ieee80211_authenticate(sdata, ifsta);
2260 break;
2261 case IEEE80211_STA_MLME_ASSOCIATE:
2262 ieee80211_associate(sdata, ifsta);
2263 break;
2264 case IEEE80211_STA_MLME_ASSOCIATED:
2265 ieee80211_associated(sdata, ifsta);
2266 break;
2267 case IEEE80211_STA_MLME_IBSS_SEARCH:
2268 ieee80211_sta_find_ibss(sdata, ifsta);
2269 break;
2270 case IEEE80211_STA_MLME_IBSS_JOINED:
2271 ieee80211_sta_merge_ibss(sdata, ifsta);
2272 break;
2273 default:
2274 WARN_ON(1);
2275 break;
2276 }
2277
2278 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2279 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2280 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2281
2282 ieee80211_set_disassoc(sdata, ifsta, false, true,
2283 WLAN_REASON_UNSPECIFIED);
2284 }
f0706e82
JB		 2285}
2286
9c6bd790
JB		 2287static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2288{
05c914fe 2289 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790
JB		 2290 queue_work(sdata->local->hw.workqueue,
2291 &sdata->u.sta.work);
2292}
f0706e82 2293
9c6bd790
JB		 2294/* interface setup */
2295void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2296{
9c6bd790 2297 struct ieee80211_if_sta *ifsta;
988c0f72 2298
9c6bd790
JB		 2299 ifsta = &sdata->u.sta;
2300 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2301 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2302 (unsigned long) sdata);
2303 skb_queue_head_init(&ifsta->skb_queue);
2304
2305 ifsta->capab = WLAN_CAPABILITY_ESS;
2306 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2307 IEEE80211_AUTH_ALG_SHARED_KEY;
2308 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2309 IEEE80211_STA_AUTO_BSSID_SEL |
2310 IEEE80211_STA_AUTO_CHANNEL_SEL;
2311 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2312 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2313}
2314
9c6bd790
JB		 2315/*
2316 * Add a new IBSS station, will also be called by the RX code when,
2317 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2318 * must be callable in atomic context.
2319 */
f698d856 2320struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 2321 struct sk_buff *skb, u8 *bssid,
87291c02 2322 u8 *addr, u64 supp_rates)
f0706e82 2323{
f698d856 2324 struct ieee80211_local *local = sdata->local;
f0706e82 2325 struct sta_info *sta;
87291c02 2326 int band = local->hw.conf.channel->band;
f0706e82
JB		 2327
2328 /* TODO: Could consider removing the least recently used entry and
2329 * allow new one to be added. */
2330 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2331 if (net_ratelimit()) {
2332 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0c68ae26 2333 "entry %pM\n", sdata->dev->name, addr);
f0706e82
JB		 2334 }
2335 return NULL;
2336 }
2337
1e188637 2338 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2339 return NULL;
2340
f4ea83dd 2341#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0c68ae26
JB		 2342 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2343 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
f4ea83dd 2344#endif
f0706e82 2345
73651ee6
JB		 2346 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2347 if (!sta)
f0706e82
JB		 2348 return NULL;
2349
07346f81 2350 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2351
8e1535d5 2352 /* make sure mandatory rates are always added */
323ce79a 2353 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 2354 ieee80211_mandatory_rates(local, band);
f0706e82 2355
4b7679a5 2356 rate_control_rate_init(sta);
f0706e82 2357
93e5deb1 2358 if (sta_info_insert(sta))
73651ee6 2359 return NULL;
73651ee6 2360
d0709a65 2361 return sta;
f0706e82
JB		 2362}
2363
9c6bd790
JB		 2364/* configuration hooks */
2365void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2366 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2367{
2368 struct ieee80211_local *local = sdata->local;
60f8b39c 2369
05c914fe 2370 if (sdata->vif.type != NL80211_IFTYPE_STATION)
9c6bd790 2371 return;
60f8b39c 2372
9c6bd790
JB		 2373 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2374 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2375 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2376 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2377
9c6bd790
JB		 2378 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2379 ieee80211_set_disassoc(sdata, ifsta, true, true,
2380 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2381
9c6bd790
JB		 2382 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2383 queue_work(local->hw.workqueue, &ifsta->work);
2384 }
2385}
60f8b39c 2386
9c6bd790
JB		 2387int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2388{
2389 struct ieee80211_if_sta *ifsta;
2390 int res;
60f8b39c 2391
9c6bd790
JB		 2392 if (len > IEEE80211_MAX_SSID_LEN)
2393 return -EINVAL;
2394
2395 ifsta = &sdata->u.sta;
2396
2397 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2398 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2399 memcpy(ifsta->ssid, ssid, len);
2400 ifsta->ssid_len = len;
2401 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2402
2403 res = 0;
2404 /*
2405 * Hack! MLME code needs to be cleaned up to have different
2406 * entry points for configuration and internal selection change
2407 */
2408 if (netif_running(sdata->dev))
2409 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2410 if (res) {
2411 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2412 "the low-level driver\n", sdata->dev->name);
2413 return res;
60f8b39c
JB		 2414 }
2415 }
60f8b39c 2416
9c6bd790
JB		 2417 if (len)
2418 ifsta->flags |= IEEE80211_STA_SSID_SET;
2419 else
2420 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2421
05c914fe 2422 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
9c6bd790
JB		 2423 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2424 ifsta->ibss_join_req = jiffies;
2425 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2426 return ieee80211_sta_find_ibss(sdata, ifsta);
2427 }
2428
2429 return 0;
2430}
2431
2432int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2433{
2434 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2435 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2436 *len = ifsta->ssid_len;
2437 return 0;
2438}
2439
2440int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2441{
2442 struct ieee80211_if_sta *ifsta;
2443 int res;
2444
2445 ifsta = &sdata->u.sta;
2446
2447 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2448 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2449 res = 0;
2450 /*
2451 * Hack! See also ieee80211_sta_set_ssid.
60f8b39c 2452 */
9c6bd790
JB		 2453 if (netif_running(sdata->dev))
2454 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2455 if (res) {
2456 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2457 "the low-level driver\n", sdata->dev->name);
2458 return res;
2459 }
2460 }
60f8b39c 2461
9c6bd790
JB		 2462 if (is_valid_ether_addr(bssid))
2463 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2464 else
2465 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2466
2467 return 0;
2468}
2469
2470int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2471{
2472 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2473
2474 kfree(ifsta->extra_ie);
2475 if (len == 0) {
2476 ifsta->extra_ie = NULL;
2477 ifsta->extra_ie_len = 0;
60f8b39c 2478 return 0;
60f8b39c 2479 }
9c6bd790
JB		 2480 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2481 if (!ifsta->extra_ie) {
2482 ifsta->extra_ie_len = 0;
2483 return -ENOMEM;
2484 }
2485 memcpy(ifsta->extra_ie, ie, len);
2486 ifsta->extra_ie_len = len;
2487 return 0;
60f8b39c
JB		 2488}
2489
f698d856 2490int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2491{
f0706e82
JB		 2492 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2493
f4ea83dd 2494 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2495 sdata->dev->name, reason);
f0706e82 2496
05c914fe
JB		 2497 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2498 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82
JB		 2499 return -EINVAL;
2500
aa458d17 2501 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2502 return 0;
2503}
2504
f698d856 2505int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2506{
f0706e82
JB		 2507 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2508
f4ea83dd 2509 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2510 sdata->dev->name, reason);
f0706e82 2511
05c914fe 2512 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 2513 return -EINVAL;
2514
d6f2da5b 2515 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2516 return -1;
2517
aa458d17 2518 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2519 return 0;
2520}
84363e6e 2521
9c6bd790
JB		 2522/* scan finished notification */
2523void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2524{
2525 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2526 struct ieee80211_if_sta *ifsta;
2527
05c914fe 2528 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB		 2529 ifsta = &sdata->u.sta;
2530 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2531 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2532 !ieee80211_sta_active_ibss(sdata)))
2533 ieee80211_sta_find_ibss(sdata, ifsta);
2534 }
2535
2536 /* Restart STA timers */
2537 rcu_read_lock();
2538 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2539 ieee80211_restart_sta_timer(sdata);
2540 rcu_read_unlock();
2541}
2542
2543/* driver notification call */
84363e6e
MA		 2544void ieee80211_notify_mac(struct ieee80211_hw *hw,
2545 enum ieee80211_notification_types notif_type)
2546{
2547 struct ieee80211_local *local = hw_to_local(hw);
2548 struct ieee80211_sub_if_data *sdata;
2549
2550 switch (notif_type) {
2551 case IEEE80211_NOTIFY_RE_ASSOC:
2552 rcu_read_lock();
2553 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
05c914fe 2554 if (sdata->vif.type != NL80211_IFTYPE_STATION)
3e122be0 2555 continue;
84363e6e 2556
f698d856 2557 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
84363e6e
MA		 2558 }
2559 rcu_read_unlock();
2560 break;
2561 }
2562}
2563EXPORT_SYMBOL(ieee80211_notify_mac);
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