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mac80211: make bridge_packets a virtual interface option
[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
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
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;
242 struct ieee80211_sta_bss *bss;
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,
b079ada7 473 struct ieee80211_sta_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
50c4afb9
JL		 571static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
572 bool use_protection,
573 bool use_short_preamble)
5628221c 574{
471b3efd 575 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
ebd74487 576#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 577 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
0795af57 578 DECLARE_MAC_BUF(mac);
ebd74487 579#endif
471b3efd 580 u32 changed = 0;
5628221c 581
471b3efd 582 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 583#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c
DD		 584 if (net_ratelimit()) {
585 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 586 "%s)\n",
471b3efd 587 sdata->dev->name,
5628221c 588 use_protection ? "enabled" : "disabled",
0795af57 589 print_mac(mac, ifsta->bssid));
5628221c 590 }
f4ea83dd 591#endif
471b3efd
JB		 592 bss_conf->use_cts_prot = use_protection;
593 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 594 }
7e9ed188 595
d43c7b37 596 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 597#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 598 if (net_ratelimit()) {
599 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 600 " (BSSID=%s)\n",
471b3efd 601 sdata->dev->name,
d43c7b37 602 use_short_preamble ? "short" : "long",
0795af57 603 print_mac(mac, ifsta->bssid));
7e9ed188 604 }
f4ea83dd 605#endif
d43c7b37 606 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 607 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 608 }
d9430a32 609
471b3efd 610 return changed;
5628221c
DD		 611}
612
50c4afb9
JL		 613static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
614 u8 erp_value)
615{
616 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
617 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
618
619 return ieee80211_handle_protect_preamb(sdata,
620 use_protection, use_short_preamble);
621}
622
623static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
624 struct ieee80211_sta_bss *bss)
625{
626 u32 changed = 0;
627
628 if (bss->has_erp_value)
629 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
630 else {
631 u16 capab = bss->capability;
632 changed |= ieee80211_handle_protect_preamb(sdata, false,
633 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
634 }
635
636 return changed;
637}
638
f5e5bf25
TW		 639static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
640 struct ieee80211_if_sta *ifsta)
641{
642 union iwreq_data wrqu;
643 memset(&wrqu, 0, sizeof(wrqu));
644 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
645 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
646 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
647 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
648}
649
f698d856 650static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 651 struct ieee80211_if_sta *ifsta)
652{
f0706e82
JB		 653 union iwreq_data wrqu;
654
f0706e82 655 if (ifsta->assocreq_ies) {
087d833e
JM		 656 memset(&wrqu, 0, sizeof(wrqu));
657 wrqu.data.length = ifsta->assocreq_ies_len;
b171e19e 658 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
087d833e 659 ifsta->assocreq_ies);
f0706e82 660 }
087d833e
JM		 661 if (ifsta->assocresp_ies) {
662 memset(&wrqu, 0, sizeof(wrqu));
663 wrqu.data.length = ifsta->assocresp_ies_len;
b171e19e 664 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
087d833e 665 ifsta->assocresp_ies);
f0706e82 666 }
f0706e82
JB		 667}
668
669
f698d856 670static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
f5e5bf25 671 struct ieee80211_if_sta *ifsta)
f0706e82 672{
471b3efd 673 struct ieee80211_local *local = sdata->local;
38668c05 674 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
471b3efd 675 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 676
f5e5bf25 677 struct ieee80211_sta_bss *bss;
d6f2da5b 678
f5e5bf25 679 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 680
f5e5bf25
TW		 681 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
682 return;
21c0cbe7 683
f5e5bf25
TW		 684 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
685 conf->channel->center_freq,
686 ifsta->ssid, ifsta->ssid_len);
687 if (bss) {
688 /* set timing information */
689 sdata->bss_conf.beacon_int = bss->beacon_int;
690 sdata->bss_conf.timestamp = bss->timestamp;
691 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 692
f5e5bf25 693 changed |= ieee80211_handle_bss_capability(sdata, bss);
9ac19a90
JB		 694
695 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 696 }
697
9ac19a90
JB		 698 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
699 changed |= BSS_CHANGED_HT;
700 sdata->bss_conf.assoc_ht = 1;
701 sdata->bss_conf.ht_conf = &conf->ht_conf;
702 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
f0706e82 703 }
3434fbd3 704
9ac19a90
JB		 705 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
706 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
707 ieee80211_sta_send_associnfo(sdata, ifsta);
9306102e 708
9ac19a90
JB		 709 ifsta->last_probe = jiffies;
710 ieee80211_led_assoc(local, 1);
9306102e 711
9ac19a90
JB		 712 sdata->bss_conf.assoc = 1;
713 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82 714
9ac19a90
JB		 715 netif_tx_start_all_queues(sdata->dev);
716 netif_carrier_on(sdata->dev);
f0706e82 717
9ac19a90 718 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 719}
720
9ac19a90
JB		 721static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
722 struct ieee80211_if_sta *ifsta)
f0706e82 723{
9ac19a90 724 DECLARE_MAC_BUF(mac);
f0706e82 725
9ac19a90
JB		 726 ifsta->direct_probe_tries++;
727 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
728 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
729 sdata->dev->name, print_mac(mac, ifsta->bssid));
730 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 731 return;
732 }
f0706e82 733
9ac19a90
JB		 734 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
735 sdata->dev->name, print_mac(mac, ifsta->bssid),
736 ifsta->direct_probe_tries);
f0706e82 737
9ac19a90 738 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 739
9ac19a90
JB		 740 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
741
742 /* Direct probe is sent to broadcast address as some APs
743 * will not answer to direct packet in unassociated state.
744 */
745 ieee80211_send_probe_req(sdata, NULL,
746 ifsta->ssid, ifsta->ssid_len);
747
748 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 749}
f0706e82 750
9ac19a90
JB		 751
752static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
753 struct ieee80211_if_sta *ifsta)
f0706e82 754{
9ac19a90 755 DECLARE_MAC_BUF(mac);
f0706e82 756
9ac19a90
JB		 757 ifsta->auth_tries++;
758 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
759 printk(KERN_DEBUG "%s: authentication with AP %s"
760 " timed out\n",
761 sdata->dev->name, print_mac(mac, ifsta->bssid));
762 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 763 return;
764 }
f0706e82 765
9ac19a90
JB		 766 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
767 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
768 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 769
9ac19a90
JB		 770 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
771
772 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 773}
774
aa458d17
TW		 775static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
776 struct ieee80211_if_sta *ifsta, bool deauth,
777 bool self_disconnected, u16 reason)
778{
779 struct ieee80211_local *local = sdata->local;
780 struct sta_info *sta;
f5e5bf25 781 u32 changed = BSS_CHANGED_ASSOC;
aa458d17
TW		 782
783 rcu_read_lock();
784
785 sta = sta_info_get(local, ifsta->bssid);
786 if (!sta) {
787 rcu_read_unlock();
788 return;
789 }
790
791 if (deauth) {
792 ifsta->direct_probe_tries = 0;
793 ifsta->auth_tries = 0;
794 }
795 ifsta->assoc_scan_tries = 0;
796 ifsta->assoc_tries = 0;
797
24e64622 798 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 799 netif_carrier_off(sdata->dev);
800
801 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
802
803 if (self_disconnected) {
804 if (deauth)
ef422bc0
JB		 805 ieee80211_send_deauth_disassoc(sdata,
806 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 807 else
ef422bc0
JB		 808 ieee80211_send_deauth_disassoc(sdata,
809 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 810 }
811
f5e5bf25
TW		 812 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
813 changed |= ieee80211_reset_erp_info(sdata);
814
815 if (sdata->bss_conf.assoc_ht)
816 changed |= BSS_CHANGED_HT;
817
818 sdata->bss_conf.assoc_ht = 0;
819 sdata->bss_conf.ht_conf = NULL;
820 sdata->bss_conf.ht_bss_conf = NULL;
821
822 ieee80211_led_assoc(local, 0);
823 sdata->bss_conf.assoc = 0;
824
825 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17
TW		 826
827 if (self_disconnected)
828 ifsta->state = IEEE80211_STA_MLME_DISABLED;
829
830 sta_info_unlink(&sta);
831
832 rcu_read_unlock();
833
834 sta_info_destroy(sta);
835}
f0706e82 836
9ac19a90
JB		 837static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
838{
839 if (!sdata || !sdata->default_key ||
840 sdata->default_key->conf.alg != ALG_WEP)
841 return 0;
842 return 1;
843}
844
f698d856 845static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 846 struct ieee80211_if_sta *ifsta)
847{
f698d856 848 struct ieee80211_local *local = sdata->local;
f0706e82 849 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 850 int bss_privacy;
851 int wep_privacy;
852 int privacy_invoked;
f0706e82 853
5b98b1f7 854 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 855 return 0;
856
f698d856 857 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 858 local->hw.conf.channel->center_freq,
cffdd30d 859 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 860 if (!bss)
861 return 0;
862
5b98b1f7 863 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 864 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 865 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 866
3e122be0 867 ieee80211_rx_bss_put(local, bss);
f0706e82 868
5b98b1f7
JB		 869 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
870 return 0;
871
872 return 1;
f0706e82
JB		 873}
874
f698d856 875static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 876 struct ieee80211_if_sta *ifsta)
877{
0795af57
JP		 878 DECLARE_MAC_BUF(mac);
879
f0706e82
JB		 880 ifsta->assoc_tries++;
881 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 882 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 883 " timed out\n",
f698d856 884 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 885 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 886 return;
887 }
888
48c2fc59 889 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0795af57 890 printk(KERN_DEBUG "%s: associate with AP %s\n",
f698d856
JBG		 891 sdata->dev->name, print_mac(mac, ifsta->bssid));
892 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 893 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 894 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 895 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 896 return;
897 }
898
f698d856 899 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 900
901 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
902}
903
904
f698d856 905static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 906 struct ieee80211_if_sta *ifsta)
907{
f698d856 908 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 909 struct sta_info *sta;
910 int disassoc;
0795af57 911 DECLARE_MAC_BUF(mac);
f0706e82
JB		 912
913 /* TODO: start monitoring current AP signal quality and number of
914 * missed beacons. Scan other channels every now and then and search
915 * for better APs. */
916 /* TODO: remove expired BSSes */
917
48c2fc59 918 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 919
d0709a65
JB		 920 rcu_read_lock();
921
f0706e82
JB		 922 sta = sta_info_get(local, ifsta->bssid);
923 if (!sta) {
0795af57 924 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
f698d856 925 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 926 disassoc = 1;
927 } else {
928 disassoc = 0;
929 if (time_after(jiffies,
930 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 931 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 932 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 933 "current AP %s - assume out of "
f0706e82 934 "range\n",
f698d856 935 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 936 disassoc = 1;
d6f2da5b 937 } else
f698d856 938 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 939 local->scan_ssid,
940 local->scan_ssid_len);
d6f2da5b 941 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 942 } else {
d6f2da5b 943 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 944 if (time_after(jiffies, ifsta->last_probe +
945 IEEE80211_PROBE_INTERVAL)) {
946 ifsta->last_probe = jiffies;
f698d856 947 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 948 ifsta->ssid,
949 ifsta->ssid_len);
950 }
951 }
f0706e82 952 }
d0709a65
JB		 953
954 rcu_read_unlock();
955
60f8b39c
JB		 956 if (disassoc)
957 ieee80211_set_disassoc(sdata, ifsta, true, true,
958 WLAN_REASON_PREV_AUTH_NOT_VALID);
959 else
960 mod_timer(&ifsta->timer, jiffies +
961 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 962}
963
964
f698d856 965static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 966 struct ieee80211_if_sta *ifsta)
967{
f698d856 968 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 969 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 970 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 971}
972
973
f698d856 974static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 975 struct ieee80211_if_sta *ifsta,
976 struct ieee80211_mgmt *mgmt,
977 size_t len)
978{
979 u8 *pos;
980 struct ieee802_11_elems elems;
981
f0706e82 982 pos = mgmt->u.auth.variable;
67a4cce4 983 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 984 if (!elems.challenge)
f0706e82 985 return;
f698d856 986 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 987 elems.challenge_len + 2, 1);
988}
989
f698d856 990static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 991 struct ieee80211_if_sta *ifsta,
992 struct ieee80211_mgmt *mgmt,
993 size_t len)
994{
f0706e82 995 u16 auth_alg, auth_transaction, status_code;
0795af57 996 DECLARE_MAC_BUF(mac);
f0706e82 997
48c2fc59 998 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
f4ea83dd 999 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82 1000 return;
f0706e82 1001
f4ea83dd 1002 if (len < 24 + 6)
f0706e82 1003 return;
f0706e82 1004
51fb61e7 1005 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1006 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1007 return;
f0706e82 1008
51fb61e7 1009 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1010 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1011 return;
f0706e82
JB		 1012
1013 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1014 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1015 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1016
51fb61e7 1017 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
135a2110
JB		 1018 /*
1019 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1020 * networks and most implementations do not seem to use it.
1021 * However, try to reply to authentication attempts if someone
1022 * has actually implemented this.
135a2110 1023 */
f4ea83dd 1024 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1025 return;
f698d856 1026 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1027 }
1028
1029 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1030 auth_transaction != ifsta->auth_transaction)
f0706e82 1031 return;
f0706e82
JB		 1032
1033 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1034 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1035 u8 algs[3];
1036 const int num_algs = ARRAY_SIZE(algs);
1037 int i, pos;
1038 algs[0] = algs[1] = algs[2] = 0xff;
1039 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1040 algs[0] = WLAN_AUTH_OPEN;
1041 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1042 algs[1] = WLAN_AUTH_SHARED_KEY;
1043 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1044 algs[2] = WLAN_AUTH_LEAP;
1045 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1046 pos = 0;
1047 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1048 pos = 1;
1049 else
1050 pos = 2;
1051 for (i = 0; i < num_algs; i++) {
1052 pos++;
1053 if (pos >= num_algs)
1054 pos = 0;
1055 if (algs[pos] == ifsta->auth_alg ||
1056 algs[pos] == 0xff)
1057 continue;
1058 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1059 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1060 continue;
1061 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1062 break;
1063 }
1064 }
1065 return;
1066 }
1067
1068 switch (ifsta->auth_alg) {
1069 case WLAN_AUTH_OPEN:
1070 case WLAN_AUTH_LEAP:
f698d856 1071 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1072 break;
1073 case WLAN_AUTH_SHARED_KEY:
1074 if (ifsta->auth_transaction == 4)
f698d856 1075 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1076 else
f698d856 1077 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1078 break;
1079 }
1080}
1081
1082
f698d856 1083static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1084 struct ieee80211_if_sta *ifsta,
1085 struct ieee80211_mgmt *mgmt,
1086 size_t len)
1087{
1088 u16 reason_code;
0795af57 1089 DECLARE_MAC_BUF(mac);
f0706e82 1090
f4ea83dd 1091 if (len < 24 + 2)
f0706e82 1092 return;
f0706e82 1093
f4ea83dd 1094 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1095 return;
f0706e82
JB		 1096
1097 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1098
988c0f72 1099 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 1100 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 1101
48c2fc59
TW		 1102 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1103 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1104 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1105 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1106 mod_timer(&ifsta->timer, jiffies +
1107 IEEE80211_RETRY_AUTH_INTERVAL);
1108 }
1109
aa458d17 1110 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1111 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1112}
1113
1114
f698d856 1115static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1116 struct ieee80211_if_sta *ifsta,
1117 struct ieee80211_mgmt *mgmt,
1118 size_t len)
1119{
1120 u16 reason_code;
0795af57 1121 DECLARE_MAC_BUF(mac);
f0706e82 1122
f4ea83dd 1123 if (len < 24 + 2)
f0706e82 1124 return;
f0706e82 1125
f4ea83dd 1126 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1127 return;
f0706e82
JB		 1128
1129 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1130
d6f2da5b 1131 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 1132 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 1133
48c2fc59
TW		 1134 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1135 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1136 mod_timer(&ifsta->timer, jiffies +
1137 IEEE80211_RETRY_AUTH_INTERVAL);
1138 }
1139
aa458d17 1140 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
f0706e82
JB		 1141}
1142
1143
471b3efd 1144static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1145 struct ieee80211_if_sta *ifsta,
1146 struct ieee80211_mgmt *mgmt,
1147 size_t len,
1148 int reassoc)
1149{
471b3efd 1150 struct ieee80211_local *local = sdata->local;
8318d78a 1151 struct ieee80211_supported_band *sband;
f0706e82 1152 struct sta_info *sta;
8318d78a 1153 u64 rates, basic_rates;
f0706e82
JB		 1154 u16 capab_info, status_code, aid;
1155 struct ieee802_11_elems elems;
471b3efd 1156 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1157 u8 *pos;
1158 int i, j;
0795af57 1159 DECLARE_MAC_BUF(mac);
8318d78a 1160 bool have_higher_than_11mbit = false;
f0706e82
JB		 1161
1162 /* AssocResp and ReassocResp have identical structure, so process both
1163 * of them in this function. */
1164
48c2fc59 1165 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1166 return;
f0706e82 1167
f4ea83dd 1168 if (len < 24 + 6)
f0706e82 1169 return;
f0706e82 1170
f4ea83dd 1171 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1172 return;
f0706e82
JB		 1173
1174 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1175 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1176 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1177
0795af57 1178 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1179 "status=%d aid=%d)\n",
f698d856 1180 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1181 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1182
1183 if (status_code != WLAN_STATUS_SUCCESS) {
1184 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1185 sdata->dev->name, status_code);
8a69aa93
DD		 1186 /* if this was a reassociation, ensure we try a "full"
1187 * association next time. This works around some broken APs
1188 * which do not correctly reject reassociation requests. */
d6f2da5b 1189 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1190 return;
1191 }
1192
1dd84aa2
JB		 1193 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1194 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1195 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1196 aid &= ~(BIT(15) | BIT(14));
1197
f0706e82 1198 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1199 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1200
1201 if (!elems.supp_rates) {
1202 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1203 sdata->dev->name);
f0706e82
JB		 1204 return;
1205 }
1206
f698d856 1207 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1208 ifsta->aid = aid;
1209 ifsta->ap_capab = capab_info;
1210
1211 kfree(ifsta->assocresp_ies);
1212 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1213 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1214 if (ifsta->assocresp_ies)
1215 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1216
d0709a65
JB		 1217 rcu_read_lock();
1218
f0706e82
JB		 1219 /* Add STA entry for the AP */
1220 sta = sta_info_get(local, ifsta->bssid);
1221 if (!sta) {
1222 struct ieee80211_sta_bss *bss;
73651ee6 1223 int err;
d0709a65 1224
73651ee6
JB		 1225 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1226 if (!sta) {
1227 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1228 " the AP\n", sdata->dev->name);
d0709a65 1229 rcu_read_unlock();
f0706e82
JB		 1230 return;
1231 }
60f8b39c
JB		 1232 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1233 local->hw.conf.channel->center_freq,
1234 ifsta->ssid, ifsta->ssid_len);
1235 if (bss) {
1236 sta->last_signal = bss->signal;
1237 sta->last_qual = bss->qual;
1238 sta->last_noise = bss->noise;
1239 ieee80211_rx_bss_put(local, bss);
1240 }
f709fc69 1241
60f8b39c
JB		 1242 err = sta_info_insert(sta);
1243 if (err) {
1244 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1245 " the AP (error %d)\n", sdata->dev->name, err);
1246 rcu_read_unlock();
1247 return;
f709fc69 1248 }
60f8b39c
JB		 1249 /* update new sta with its last rx activity */
1250 sta->last_rx = jiffies;
f709fc69 1251 }
f709fc69 1252
60f8b39c
JB		 1253 /*
1254 * FIXME: Do we really need to update the sta_info's information here?
1255 * We already know about the AP (we found it in our list) so it
1256 * should already be filled with the right info, no?
1257 * As is stands, all this is racy because typically we assume
1258 * the information that is filled in here (except flags) doesn't
1259 * change while a STA structure is alive. As such, it should move
1260 * to between the sta_info_alloc() and sta_info_insert() above.
1261 */
f709fc69 1262
60f8b39c
JB		 1263 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1264 WLAN_STA_AUTHORIZED);
05e5e883 1265
60f8b39c
JB		 1266 rates = 0;
1267 basic_rates = 0;
1268 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1269
60f8b39c
JB		 1270 for (i = 0; i < elems.supp_rates_len; i++) {
1271 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f709fc69 1272
60f8b39c
JB		 1273 if (rate > 110)
1274 have_higher_than_11mbit = true;
1275
1276 for (j = 0; j < sband->n_bitrates; j++) {
1277 if (sband->bitrates[j].bitrate == rate)
1278 rates |= BIT(j);
1279 if (elems.supp_rates[i] & 0x80)
1280 basic_rates |= BIT(j);
f709fc69 1281 }
f709fc69
LCC		 1282 }
1283
60f8b39c
JB		 1284 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1285 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82 1286
60f8b39c
JB		 1287 if (rate > 110)
1288 have_higher_than_11mbit = true;
f0706e82 1289
60f8b39c
JB		 1290 for (j = 0; j < sband->n_bitrates; j++) {
1291 if (sband->bitrates[j].bitrate == rate)
1292 rates |= BIT(j);
1293 if (elems.ext_supp_rates[i] & 0x80)
1294 basic_rates |= BIT(j);
1295 }
1ebebea8 1296 }
f0706e82 1297
60f8b39c
JB		 1298 sta->supp_rates[local->hw.conf.channel->band] = rates;
1299 sdata->basic_rates = basic_rates;
1300
1301 /* cf. IEEE 802.11 9.2.12 */
1302 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1303 have_higher_than_11mbit)
1304 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1305 else
1306 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1307
60f8b39c
JB		 1308 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1309 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1310 struct ieee80211_ht_bss_info bss_info;
1311 ieee80211_ht_cap_ie_to_ht_info(
1312 (struct ieee80211_ht_cap *)
1313 elems.ht_cap_elem, &sta->ht_info);
1314 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1315 (struct ieee80211_ht_addt_info *)
1316 elems.ht_info_elem, &bss_info);
1317 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
1318 }
f0706e82 1319
60f8b39c 1320 rate_control_rate_init(sta, local);
f0706e82 1321
60f8b39c
JB		 1322 if (elems.wmm_param) {
1323 set_sta_flags(sta, WLAN_STA_WME);
1324 rcu_read_unlock();
1325 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1326 elems.wmm_param_len);
1327 } else
1328 rcu_read_unlock();
f0706e82 1329
60f8b39c
JB		 1330 /* set AID and assoc capability,
1331 * ieee80211_set_associated() will tell the driver */
1332 bss_conf->aid = aid;
1333 bss_conf->assoc_capability = capab_info;
1334 ieee80211_set_associated(sdata, ifsta);
f0706e82 1335
60f8b39c 1336 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1337}
1338
1339
f698d856 1340static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a
BR		 1341 struct ieee80211_if_sta *ifsta,
1342 struct ieee80211_sta_bss *bss)
1343{
f698d856 1344 struct ieee80211_local *local = sdata->local;
a607268a
BR		 1345 int res, rates, i, j;
1346 struct sk_buff *skb;
1347 struct ieee80211_mgmt *mgmt;
a607268a 1348 u8 *pos;
a607268a 1349 struct ieee80211_supported_band *sband;
507b06d0 1350 union iwreq_data wrqu;
a607268a
BR		 1351
1352 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1353
1354 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1355 sta_info_flush_delayed(sdata);
a607268a
BR		 1356
1357 if (local->ops->reset_tsf) {
1358 /* Reset own TSF to allow time synchronization work. */
1359 local->ops->reset_tsf(local_to_hw(local));
1360 }
1361 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1362 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1363 if (res)
1364 return res;
1365
1366 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1367
a607268a
BR		 1368 sdata->drop_unencrypted = bss->capability &
1369 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1370
f698d856 1371 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1372
be038b37
AK		 1373 if (res)
1374 return res;
a607268a 1375
9d139c81 1376 /* Build IBSS probe response */
a607268a 1377 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 1378 if (skb) {
a607268a
BR		 1379 skb_reserve(skb, local->hw.extra_tx_headroom);
1380
1381 mgmt = (struct ieee80211_mgmt *)
1382 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1383 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 1384 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1385 IEEE80211_STYPE_PROBE_RESP);
a607268a 1386 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 1387 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 1388 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1389 mgmt->u.beacon.beacon_int =
1390 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 1391 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 1392 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1393
1394 pos = skb_put(skb, 2 + ifsta->ssid_len);
1395 *pos++ = WLAN_EID_SSID;
1396 *pos++ = ifsta->ssid_len;
1397 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1398
1399 rates = bss->supp_rates_len;
1400 if (rates > 8)
1401 rates = 8;
1402 pos = skb_put(skb, 2 + rates);
1403 *pos++ = WLAN_EID_SUPP_RATES;
1404 *pos++ = rates;
1405 memcpy(pos, bss->supp_rates, rates);
1406
1407 if (bss->band == IEEE80211_BAND_2GHZ) {
1408 pos = skb_put(skb, 2 + 1);
1409 *pos++ = WLAN_EID_DS_PARAMS;
1410 *pos++ = 1;
1411 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1412 }
1413
1414 pos = skb_put(skb, 2 + 2);
1415 *pos++ = WLAN_EID_IBSS_PARAMS;
1416 *pos++ = 2;
1417 /* FIX: set ATIM window based on scan results */
1418 *pos++ = 0;
1419 *pos++ = 0;
1420
1421 if (bss->supp_rates_len > 8) {
1422 rates = bss->supp_rates_len - 8;
1423 pos = skb_put(skb, 2 + rates);
1424 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1425 *pos++ = rates;
1426 memcpy(pos, &bss->supp_rates[8], rates);
1427 }
1428
9d139c81 1429 ifsta->probe_resp = skb;
e039fa4a 1430
9d139c81
JB		 1431 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1432 }
a607268a 1433
9d139c81
JB		 1434 rates = 0;
1435 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1436 for (i = 0; i < bss->supp_rates_len; i++) {
1437 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1438 for (j = 0; j < sband->n_bitrates; j++)
1439 if (sband->bitrates[j].bitrate == bitrate)
1440 rates |= BIT(j);
a607268a 1441 }
9d139c81
JB		 1442 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1443
b079ada7 1444 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1445
48c2fc59 1446 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1447 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1448
507b06d0
DW		 1449 memset(&wrqu, 0, sizeof(wrqu));
1450 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1451 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1452
1453 return res;
1454}
1455
8e1535d5
EG		 1456static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
1457 enum ieee80211_band band)
1458{
1459 struct ieee80211_supported_band *sband;
1460 struct ieee80211_rate *bitrates;
1461 u64 mandatory_rates;
1462 enum ieee80211_rate_flags mandatory_flag;
1463 int i;
1464
1465 sband = local->hw.wiphy->bands[band];
1466 if (!sband) {
1467 WARN_ON(1);
1468 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1469 }
1470
1471 if (band == IEEE80211_BAND_2GHZ)
1472 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1473 else
1474 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1475
1476 bitrates = sband->bitrates;
1477 mandatory_rates = 0;
1478 for (i = 0; i < sband->n_bitrates; i++)
1479 if (bitrates[i].flags & mandatory_flag)
1480 mandatory_rates |= BIT(i);
1481 return mandatory_rates;
1482}
a607268a 1483
98c8fccf
JB		 1484static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1485 struct ieee80211_mgmt *mgmt,
1486 size_t len,
1487 struct ieee80211_rx_status *rx_status,
1488 struct ieee802_11_elems *elems,
1489 bool beacon)
1490{
1491 struct ieee80211_local *local = sdata->local;
1492 int freq;
1493 struct ieee80211_sta_bss *bss;
1494 struct sta_info *sta;
1495 struct ieee80211_channel *channel;
1496 u64 beacon_timestamp, rx_timestamp;
1497 u64 supp_rates = 0;
1498 enum ieee80211_band band = rx_status->band;
1499 DECLARE_MAC_BUF(mac);
1500 DECLARE_MAC_BUF(mac2);
1501
1502 if (elems->ds_params && elems->ds_params_len == 1)
1503 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1504 else
1505 freq = rx_status->freq;
1506
1507 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1508
1509 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1510 return;
1511
98c8fccf
JB		 1512 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
1513 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1514 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1515
1516 rcu_read_lock();
1517
1518 sta = sta_info_get(local, mgmt->sa);
1519 if (sta) {
1520 u64 prev_rates;
1521
1522 prev_rates = sta->supp_rates[band];
1523 /* make sure mandatory rates are always added */
1524 sta->supp_rates[band] = supp_rates |
1525 ieee80211_sta_get_mandatory_rates(local, band);
1526
1527#ifdef CONFIG_MAC80211_IBSS_DEBUG
1528 if (sta->supp_rates[band] != prev_rates)
1529 printk(KERN_DEBUG "%s: updated supp_rates set "
1530 "for %s based on beacon info (0x%llx | "
1531 "0x%llx -> 0x%llx)\n",
1532 sdata->dev->name, print_mac(mac, sta->addr),
1533 (unsigned long long) prev_rates,
1534 (unsigned long long) supp_rates,
1535 (unsigned long long) sta->supp_rates[band]);
1536#endif
1537 } else {
1538 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1539 mgmt->sa, supp_rates);
1540 }
1541
1542 rcu_read_unlock();
1543 }
1544
1545 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1546 freq, beacon);
1547 if (!bss)
1548 return;
1549
1550 /* was just updated in ieee80211_bss_info_update */
1551 beacon_timestamp = bss->timestamp;
1552
30b89b0f
JB		 1553 /*
1554 * In STA mode, the remaining parameters should not be overridden
1555 * by beacons because they're not necessarily accurate there.
1556 */
1557 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
9859b81e 1558 bss->last_probe_resp && beacon) {
3e122be0 1559 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1560 return;
1561 }
1562
9d9bf77d
BR		 1563 /* check if we need to merge IBSS */
1564 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
fba4a1e6 1565 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1566 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1567 elems->ssid_len == sdata->u.sta.ssid_len &&
1568 memcmp(elems->ssid, sdata->u.sta.ssid,
1569 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1570 if (rx_status->flag & RX_FLAG_TSFT) {
1571 /* in order for correct IBSS merging we need mactime
1572 *
1573 * since mactime is defined as the time the first data
1574 * symbol of the frame hits the PHY, and the timestamp
1575 * of the beacon is defined as "the time that the data
1576 * symbol containing the first bit of the timestamp is
1577 * transmitted to the PHY plus the transmitting STA’s
1578 * delays through its local PHY from the MAC-PHY
1579 * interface to its interface with the WM"
1580 * (802.11 11.1.2) - equals the time this bit arrives at
1581 * the receiver - we have to take into account the
1582 * offset between the two.
1583 * e.g: at 1 MBit that means mactime is 192 usec earlier
1584 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1585 */
8e1535d5 1586 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 1587 bitrates[rx_status->rate_idx].bitrate;
1588 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1589 } else if (local && local->ops && local->ops->get_tsf)
1590 /* second best option: get current TSF */
1591 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1592 else
1593 /* can't merge without knowing the TSF */
1594 rx_timestamp = -1LLU;
1595#ifdef CONFIG_MAC80211_IBSS_DEBUG
1596 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1597 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1598 print_mac(mac, mgmt->sa),
1599 print_mac(mac2, mgmt->bssid),
1600 (unsigned long long)rx_timestamp,
1601 (unsigned long long)beacon_timestamp,
1602 (unsigned long long)(rx_timestamp - beacon_timestamp),
1603 jiffies);
1604#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1605 if (beacon_timestamp > rx_timestamp) {
576fdeae 1606#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 1607 printk(KERN_DEBUG "%s: beacon TSF higher than "
1608 "local TSF - IBSS merge with BSSID %s\n",
f698d856 1609 sdata->dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 1610#endif
f698d856
JBG		 1611 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1612 ieee80211_ibss_add_sta(sdata, NULL,
87291c02 1613 mgmt->bssid, mgmt->sa,
8e1535d5 1614 supp_rates);
9d9bf77d
BR		 1615 }
1616 }
1617
3e122be0 1618 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1619}
1620
1621
f698d856 1622static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1623 struct ieee80211_mgmt *mgmt,
1624 size_t len,
1625 struct ieee80211_rx_status *rx_status)
1626{
ae6a44e3
EK		 1627 size_t baselen;
1628 struct ieee802_11_elems elems;
9859b81e 1629 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1630
8e7cdbb6
TW		 1631 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1632 return; /* ignore ProbeResp to foreign address */
1633
ae6a44e3
EK		 1634 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1635 if (baselen > len)
1636 return;
1637
1638 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1639 &elems);
1640
98c8fccf 1641 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1642
1643 /* direct probe may be part of the association flow */
1644 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1645 &ifsta->request)) {
1646 printk(KERN_DEBUG "%s direct probe responded\n",
1647 sdata->dev->name);
1648 ieee80211_authenticate(sdata, ifsta);
1649 }
f0706e82
JB		 1650}
1651
1652
f698d856 1653static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1654 struct ieee80211_mgmt *mgmt,
1655 size_t len,
1656 struct ieee80211_rx_status *rx_status)
1657{
f0706e82 1658 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1659 size_t baselen;
1660 struct ieee802_11_elems elems;
f698d856 1661 struct ieee80211_local *local = sdata->local;
d3c990fb 1662 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 1663 u32 changed = 0;
f0706e82 1664
ae6a44e3
EK		 1665 /* Process beacon from the current BSS */
1666 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1667 if (baselen > len)
1668 return;
1669
1670 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1671
98c8fccf 1672 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1673
51fb61e7 1674 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 1675 return;
1676 ifsta = &sdata->u.sta;
1677
d6f2da5b 1678 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1679 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1680 return;
1681
fe3fa827
JB		 1682 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1683 elems.wmm_param_len);
1684
5628221c 1685 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 1686 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 1687 else {
1688 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
1689 changed |= ieee80211_handle_protect_preamb(sdata, false,
1690 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
1691 }
f0706e82 1692
d3c990fb 1693 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 1694 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 1695 struct ieee80211_ht_bss_info bss_info;
1696
1697 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1698 (struct ieee80211_ht_addt_info *)
1699 elems.ht_info_elem, &bss_info);
38668c05
TW		 1700 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
1701 &bss_info);
d3c990fb
RR		 1702 }
1703
471b3efd 1704 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1705}
1706
1707
f698d856 1708static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1709 struct ieee80211_if_sta *ifsta,
1710 struct ieee80211_mgmt *mgmt,
1711 size_t len,
1712 struct ieee80211_rx_status *rx_status)
1713{
f698d856 1714 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1715 int tx_last_beacon;
1716 struct sk_buff *skb;
1717 struct ieee80211_mgmt *resp;
1718 u8 *pos, *end;
0795af57
JP		 1719 DECLARE_MAC_BUF(mac);
1720#ifdef CONFIG_MAC80211_IBSS_DEBUG
1721 DECLARE_MAC_BUF(mac2);
1722 DECLARE_MAC_BUF(mac3);
1723#endif
f0706e82 1724
51fb61e7 1725 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
48c2fc59 1726 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 1727 len < 24 + 2 || !ifsta->probe_resp)
1728 return;
1729
1730 if (local->ops->tx_last_beacon)
1731 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1732 else
1733 tx_last_beacon = 1;
1734
1735#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1736 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1737 "%s (tx_last_beacon=%d)\n",
f698d856 1738 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
0795af57 1739 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 1740#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1741
1742 if (!tx_last_beacon)
1743 return;
1744
1745 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1746 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1747 return;
1748
1749 end = ((u8 *) mgmt) + len;
1750 pos = mgmt->u.probe_req.variable;
1751 if (pos[0] != WLAN_EID_SSID ||
1752 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 1753#ifdef CONFIG_MAC80211_IBSS_DEBUG
1754 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1755 "from %s\n",
f698d856 1756 sdata->dev->name, print_mac(mac, mgmt->sa));
f4ea83dd 1757#endif
f0706e82
JB		 1758 return;
1759 }
1760 if (pos[1] != 0 &&
1761 (pos[1] != ifsta->ssid_len ||
1762 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1763 /* Ignore ProbeReq for foreign SSID */
1764 return;
1765 }
1766
1767 /* Reply with ProbeResp */
0ec0b7ac 1768 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1769 if (!skb)
1770 return;
1771
1772 resp = (struct ieee80211_mgmt *) skb->data;
1773 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1774#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 1775 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
f698d856 1776 sdata->dev->name, print_mac(mac, resp->da));
f0706e82 1777#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 1778 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 1779}
1780
f698d856 1781void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 1782 struct ieee80211_rx_status *rx_status)
1783{
f698d856 1784 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1785 struct ieee80211_if_sta *ifsta;
1786 struct ieee80211_mgmt *mgmt;
1787 u16 fc;
1788
1789 if (skb->len < 24)
1790 goto fail;
1791
f0706e82
JB		 1792 ifsta = &sdata->u.sta;
1793
1794 mgmt = (struct ieee80211_mgmt *) skb->data;
1795 fc = le16_to_cpu(mgmt->frame_control);
1796
1797 switch (fc & IEEE80211_FCTL_STYPE) {
1798 case IEEE80211_STYPE_PROBE_REQ:
1799 case IEEE80211_STYPE_PROBE_RESP:
1800 case IEEE80211_STYPE_BEACON:
1801 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1802 case IEEE80211_STYPE_AUTH:
1803 case IEEE80211_STYPE_ASSOC_RESP:
1804 case IEEE80211_STYPE_REASSOC_RESP:
1805 case IEEE80211_STYPE_DEAUTH:
1806 case IEEE80211_STYPE_DISASSOC:
1807 skb_queue_tail(&ifsta->skb_queue, skb);
1808 queue_work(local->hw.workqueue, &ifsta->work);
1809 return;
f0706e82
JB		 1810 }
1811
1812 fail:
1813 kfree_skb(skb);
1814}
1815
f698d856 1816static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1817 struct sk_buff *skb)
1818{
1819 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 1820 struct ieee80211_if_sta *ifsta;
1821 struct ieee80211_mgmt *mgmt;
1822 u16 fc;
1823
f0706e82
JB		 1824 ifsta = &sdata->u.sta;
1825
1826 rx_status = (struct ieee80211_rx_status *) skb->cb;
1827 mgmt = (struct ieee80211_mgmt *) skb->data;
1828 fc = le16_to_cpu(mgmt->frame_control);
1829
1830 switch (fc & IEEE80211_FCTL_STYPE) {
1831 case IEEE80211_STYPE_PROBE_REQ:
f698d856 1832 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 1833 rx_status);
1834 break;
1835 case IEEE80211_STYPE_PROBE_RESP:
f698d856 1836 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1837 break;
1838 case IEEE80211_STYPE_BEACON:
f698d856 1839 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1840 break;
1841 case IEEE80211_STYPE_AUTH:
f698d856 1842 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1843 break;
1844 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 1845 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 1846 break;
1847 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 1848 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 1849 break;
1850 case IEEE80211_STYPE_DEAUTH:
f698d856 1851 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1852 break;
1853 case IEEE80211_STYPE_DISASSOC:
f698d856 1854 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1855 break;
1856 }
1857
1858 kfree_skb(skb);
1859}
1860
1861
f698d856 1862static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 1863{
f698d856 1864 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1865 int active = 0;
1866 struct sta_info *sta;
1867
d0709a65
JB		 1868 rcu_read_lock();
1869
1870 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1871 if (sta->sdata == sdata &&
f0706e82
JB		 1872 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1873 jiffies)) {
1874 active++;
1875 break;
1876 }
1877 }
d0709a65
JB		 1878
1879 rcu_read_unlock();
f0706e82
JB		 1880
1881 return active;
1882}
1883
1884
f698d856 1885static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1886 struct ieee80211_if_sta *ifsta)
1887{
1888 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1889
f698d856
JBG		 1890 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1891 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 1892 return;
1893
1894 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856
JBG		 1895 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
1896 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1897}
1898
1899
9c6bd790 1900static void ieee80211_sta_timer(unsigned long data)
f0706e82 1901{
60f8b39c
JB		 1902 struct ieee80211_sub_if_data *sdata =
1903 (struct ieee80211_sub_if_data *) data;
1904 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1905 struct ieee80211_local *local = sdata->local;
f0706e82 1906
60f8b39c
JB		 1907 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1908 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 1909}
1910
f698d856 1911static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1912 struct ieee80211_if_sta *ifsta)
1913{
f698d856 1914 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1915
1916 if (local->ops->reset_tsf) {
1917 /* Reset own TSF to allow time synchronization work. */
1918 local->ops->reset_tsf(local_to_hw(local));
1919 }
1920
1921 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1922
1923
1924 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1925 ifsta->auth_alg = WLAN_AUTH_OPEN;
1926 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1927 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1928 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1929 ifsta->auth_alg = WLAN_AUTH_LEAP;
1930 else
1931 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 1932 ifsta->auth_transaction = -1;
d6f2da5b 1933 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 1934 ifsta->assoc_scan_tries = 0;
9859b81e 1935 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 1936 ifsta->auth_tries = 0;
1937 ifsta->assoc_tries = 0;
24e64622 1938 netif_tx_stop_all_queues(sdata->dev);
f698d856 1939 netif_carrier_off(sdata->dev);
f0706e82
JB		 1940}
1941
1942
f0706e82
JB		 1943static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1944 const char *ssid, int ssid_len)
1945{
1946 int tmp, hidden_ssid;
1947
48225709
MW		 1948 if (ssid_len == ifsta->ssid_len &&
1949 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 1950 return 1;
1951
d6f2da5b 1952 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 1953 return 0;
1954
1955 hidden_ssid = 1;
1956 tmp = ssid_len;
1957 while (tmp--) {
1958 if (ssid[tmp] != '\0') {
1959 hidden_ssid = 0;
1960 break;
1961 }
1962 }
1963
1964 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1965 return 1;
1966
1967 if (ssid_len == 1 && ssid[0] == ' ')
1968 return 1;
1969
1970 return 0;
1971}
1972
f698d856 1973static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1974 struct ieee80211_if_sta *ifsta)
1975{
f698d856 1976 struct ieee80211_local *local = sdata->local;
f0706e82 1977 struct ieee80211_sta_bss *bss;
8318d78a 1978 struct ieee80211_supported_band *sband;
f0706e82
JB		 1979 u8 bssid[ETH_ALEN], *pos;
1980 int i;
167ad6f7 1981 int ret;
0795af57 1982 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1983
1984#if 0
1985 /* Easier testing, use fixed BSSID. */
1986 memset(bssid, 0xfe, ETH_ALEN);
1987#else
1988 /* Generate random, not broadcast, locally administered BSSID. Mix in
1989 * own MAC address to make sure that devices that do not have proper
1990 * random number generator get different BSSID. */
1991 get_random_bytes(bssid, ETH_ALEN);
1992 for (i = 0; i < ETH_ALEN; i++)
f698d856 1993 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 1994 bssid[0] &= ~0x01;
1995 bssid[0] |= 0x02;
1996#endif
1997
0795af57 1998 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
f698d856 1999 sdata->dev->name, print_mac(mac, bssid));
f0706e82 2000
98c8fccf 2001 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2002 local->hw.conf.channel->center_freq,
cffdd30d 2003 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2004 if (!bss)
2005 return -ENOMEM;
2006
8318d78a
JB		 2007 bss->band = local->hw.conf.channel->band;
2008 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2009
2010 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2011 local->hw.conf.beacon_int = 100;
f0706e82 2012 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2013 bss->last_update = jiffies;
2014 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2015
2016 if (sdata->default_key)
f0706e82 2017 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2018 else
f0706e82 2019 sdata->drop_unencrypted = 0;
988c0f72 2020
8318d78a 2021 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2022 pos = bss->supp_rates;
8318d78a
JB		 2023 for (i = 0; i < sband->n_bitrates; i++) {
2024 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2025 *pos++ = (u8) (rate / 5);
2026 }
2027
f698d856 2028 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2029 ieee80211_rx_bss_put(local, bss);
167ad6f7 2030 return ret;
f0706e82
JB		 2031}
2032
2033
f698d856 2034static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2035 struct ieee80211_if_sta *ifsta)
2036{
f698d856 2037 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2038 struct ieee80211_sta_bss *bss;
2039 int found = 0;
2040 u8 bssid[ETH_ALEN];
2041 int active_ibss;
0795af57
JP		 2042 DECLARE_MAC_BUF(mac);
2043 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2044
2045 if (ifsta->ssid_len == 0)
2046 return -EINVAL;
2047
f698d856 2048 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2049#ifdef CONFIG_MAC80211_IBSS_DEBUG
2050 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2051 sdata->dev->name, active_ibss);
f0706e82
JB		 2052#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2053 spin_lock_bh(&local->sta_bss_lock);
2054 list_for_each_entry(bss, &local->sta_bss_list, list) {
2055 if (ifsta->ssid_len != bss->ssid_len ||
2056 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2057 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2058 continue;
2059#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2060 printk(KERN_DEBUG " bssid=%s found\n",
2061 print_mac(mac, bss->bssid));
f0706e82
JB		 2062#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2063 memcpy(bssid, bss->bssid, ETH_ALEN);
2064 found = 1;
2065 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2066 break;
2067 }
2068 spin_unlock_bh(&local->sta_bss_lock);
2069
2070#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 2071 if (found)
2072 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2073 "%s\n", print_mac(mac, bssid),
2074 print_mac(mac2, ifsta->bssid));
f0706e82 2075#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 2076
2077 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 2078 int ret;
80693ceb
DD		 2079 int search_freq;
2080
2081 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2082 search_freq = bss->freq;
2083 else
2084 search_freq = local->hw.conf.channel->center_freq;
2085
f698d856 2086 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2087 ifsta->ssid, ifsta->ssid_len);
2088 if (!bss)
2089 goto dont_join;
2090
0795af57 2091 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2092 " based on configured SSID\n",
f698d856
JBG		 2093 sdata->dev->name, print_mac(mac, bssid));
2094 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2095 ieee80211_rx_bss_put(local, bss);
167ad6f7 2096 return ret;
f0706e82 2097 }
80693ceb
DD		 2098
2099dont_join:
f0706e82
JB		 2100#ifdef CONFIG_MAC80211_IBSS_DEBUG
2101 printk(KERN_DEBUG " did not try to join ibss\n");
2102#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2103
2104 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2105 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2106 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2107 mod_timer(&ifsta->timer, jiffies +
2108 IEEE80211_IBSS_MERGE_INTERVAL);
2109 } else if (time_after(jiffies, local->last_scan_completed +
2110 IEEE80211_SCAN_INTERVAL)) {
2111 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856
JBG		 2112 "join\n", sdata->dev->name);
2113 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
f0706e82 2114 ifsta->ssid_len);
48c2fc59 2115 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2116 int interval = IEEE80211_SCAN_INTERVAL;
2117
2118 if (time_after(jiffies, ifsta->ibss_join_req +
2119 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2120 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2121 (!(local->oper_channel->flags &
2122 IEEE80211_CHAN_NO_IBSS)))
f698d856 2123 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2124 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2125 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2126 " %d MHz\n", sdata->dev->name,
8318d78a 2127 local->hw.conf.channel->center_freq);
f0706e82
JB		 2128 }
2129
2130 /* No IBSS found - decrease scan interval and continue
2131 * scanning. */
2132 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2133 }
2134
48c2fc59 2135 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2136 mod_timer(&ifsta->timer, jiffies + interval);
2137 return 0;
2138 }
2139
2140 return 0;
2141}
2142
2143
9c6bd790
JB		 2144static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2145 struct ieee80211_if_sta *ifsta)
f0706e82 2146{
9c6bd790
JB		 2147 struct ieee80211_local *local = sdata->local;
2148 struct ieee80211_sta_bss *bss, *selected = NULL;
2149 int top_rssi = 0, freq;
f0706e82 2150
9c6bd790
JB		 2151 spin_lock_bh(&local->sta_bss_lock);
2152 freq = local->oper_channel->center_freq;
2153 list_for_each_entry(bss, &local->sta_bss_list, list) {
2154 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2155 continue;
f0706e82 2156
9c6bd790
JB		 2157 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2158 IEEE80211_STA_AUTO_BSSID_SEL |
2159 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2160 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2161 !!sdata->default_key))
2162 continue;
f0706e82 2163
9c6bd790
JB		 2164 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2165 bss->freq != freq)
2166 continue;
9d139c81 2167
9c6bd790
JB		 2168 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2169 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2170 continue;
f0706e82 2171
9c6bd790
JB		 2172 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2173 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2174 continue;
9d139c81 2175
9c6bd790
JB		 2176 if (!selected || top_rssi < bss->signal) {
2177 selected = bss;
2178 top_rssi = bss->signal;
2179 }
f0706e82 2180 }
9c6bd790
JB		 2181 if (selected)
2182 atomic_inc(&selected->users);
2183 spin_unlock_bh(&local->sta_bss_lock);
9d139c81 2184
9c6bd790
JB		 2185 if (selected) {
2186 ieee80211_set_freq(sdata, selected->freq);
2187 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2188 ieee80211_sta_set_ssid(sdata, selected->ssid,
2189 selected->ssid_len);
2190 ieee80211_sta_set_bssid(sdata, selected->bssid);
2191 ieee80211_sta_def_wmm_params(sdata, selected);
f0706e82 2192
9c6bd790
JB		 2193 /* Send out direct probe if no probe resp was received or
2194 * the one we have is outdated
2195 */
2196 if (!selected->last_probe_resp ||
2197 time_after(jiffies, selected->last_probe_resp
2198 + IEEE80211_SCAN_RESULT_EXPIRE))
2199 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2200 else
2201 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2202
9c6bd790
JB		 2203 ieee80211_rx_bss_put(local, selected);
2204 ieee80211_sta_reset_auth(sdata, ifsta);
2205 return 0;
2206 } else {
2207 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2208 ifsta->assoc_scan_tries++;
2209 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2210 ieee80211_sta_start_scan(sdata, NULL, 0);
2211 else
2212 ieee80211_sta_start_scan(sdata, ifsta->ssid,
2213 ifsta->ssid_len);
2214 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2215 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2216 } else
2217 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2218 }
2219 return -1;
2220}
2221
2222
2223static void ieee80211_sta_work(struct work_struct *work)
2224{
2225 struct ieee80211_sub_if_data *sdata =
2226 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2227 struct ieee80211_local *local = sdata->local;
2228 struct ieee80211_if_sta *ifsta;
2229 struct sk_buff *skb;
2230
2231 if (!netif_running(sdata->dev))
2232 return;
2233
2234 if (local->sta_sw_scanning || local->sta_hw_scanning)
2235 return;
2236
2237 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2238 sdata->vif.type != IEEE80211_IF_TYPE_IBSS))
2239 return;
f0706e82
JB		 2240 ifsta = &sdata->u.sta;
2241
9c6bd790
JB		 2242 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2243 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2244
2245 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2246 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2247 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2248 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2249 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
2250 return;
f0706e82
JB		 2251 }
2252
9c6bd790
JB		 2253 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2254 if (ieee80211_sta_config_auth(sdata, ifsta))
2255 return;
2256 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2257 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2258 return;
d6f2da5b 2259
9c6bd790
JB		 2260 switch (ifsta->state) {
2261 case IEEE80211_STA_MLME_DISABLED:
2262 break;
2263 case IEEE80211_STA_MLME_DIRECT_PROBE:
2264 ieee80211_direct_probe(sdata, ifsta);
2265 break;
2266 case IEEE80211_STA_MLME_AUTHENTICATE:
2267 ieee80211_authenticate(sdata, ifsta);
2268 break;
2269 case IEEE80211_STA_MLME_ASSOCIATE:
2270 ieee80211_associate(sdata, ifsta);
2271 break;
2272 case IEEE80211_STA_MLME_ASSOCIATED:
2273 ieee80211_associated(sdata, ifsta);
2274 break;
2275 case IEEE80211_STA_MLME_IBSS_SEARCH:
2276 ieee80211_sta_find_ibss(sdata, ifsta);
2277 break;
2278 case IEEE80211_STA_MLME_IBSS_JOINED:
2279 ieee80211_sta_merge_ibss(sdata, ifsta);
2280 break;
2281 default:
2282 WARN_ON(1);
2283 break;
2284 }
2285
2286 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2287 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2288 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2289
2290 ieee80211_set_disassoc(sdata, ifsta, false, true,
2291 WLAN_REASON_UNSPECIFIED);
2292 }
f0706e82
JB		 2293}
2294
9c6bd790
JB		 2295static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2296{
2297 if (sdata->vif.type == IEEE80211_IF_TYPE_STA)
2298 queue_work(sdata->local->hw.workqueue,
2299 &sdata->u.sta.work);
2300}
f0706e82 2301
9c6bd790
JB		 2302/* interface setup */
2303void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2304{
9c6bd790 2305 struct ieee80211_if_sta *ifsta;
988c0f72 2306
9c6bd790
JB		 2307 ifsta = &sdata->u.sta;
2308 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2309 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2310 (unsigned long) sdata);
2311 skb_queue_head_init(&ifsta->skb_queue);
2312
2313 ifsta->capab = WLAN_CAPABILITY_ESS;
2314 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2315 IEEE80211_AUTH_ALG_SHARED_KEY;
2316 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2317 IEEE80211_STA_AUTO_BSSID_SEL |
2318 IEEE80211_STA_AUTO_CHANNEL_SEL;
2319 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2320 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2321}
2322
9c6bd790
JB		 2323/*
2324 * Add a new IBSS station, will also be called by the RX code when,
2325 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2326 * must be callable in atomic context.
2327 */
f698d856 2328struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 2329 struct sk_buff *skb, u8 *bssid,
87291c02 2330 u8 *addr, u64 supp_rates)
f0706e82 2331{
f698d856 2332 struct ieee80211_local *local = sdata->local;
f0706e82 2333 struct sta_info *sta;
0795af57 2334 DECLARE_MAC_BUF(mac);
87291c02 2335 int band = local->hw.conf.channel->band;
f0706e82
JB		 2336
2337 /* TODO: Could consider removing the least recently used entry and
2338 * allow new one to be added. */
2339 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2340 if (net_ratelimit()) {
2341 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
f698d856 2342 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
f0706e82
JB		 2343 }
2344 return NULL;
2345 }
2346
1e188637 2347 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2348 return NULL;
2349
f4ea83dd 2350#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 2351 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
f698d856 2352 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
f4ea83dd 2353#endif
f0706e82 2354
73651ee6
JB		 2355 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2356 if (!sta)
f0706e82
JB		 2357 return NULL;
2358
07346f81 2359 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2360
8e1535d5
EG		 2361 /* make sure mandatory rates are always added */
2362 sta->supp_rates[band] = supp_rates |
2363 ieee80211_sta_get_mandatory_rates(local, band);
f0706e82
JB		 2364
2365 rate_control_rate_init(sta, local);
2366
93e5deb1 2367 if (sta_info_insert(sta))
73651ee6 2368 return NULL;
73651ee6 2369
d0709a65 2370 return sta;
f0706e82
JB		 2371}
2372
9c6bd790
JB		 2373/* configuration hooks */
2374void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2375 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2376{
2377 struct ieee80211_local *local = sdata->local;
60f8b39c 2378
9c6bd790
JB		 2379 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2380 return;
60f8b39c 2381
9c6bd790
JB		 2382 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2383 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2384 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2385 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2386
9c6bd790
JB		 2387 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2388 ieee80211_set_disassoc(sdata, ifsta, true, true,
2389 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2390
9c6bd790
JB		 2391 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2392 queue_work(local->hw.workqueue, &ifsta->work);
2393 }
2394}
60f8b39c 2395
9c6bd790
JB		 2396int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2397{
2398 struct ieee80211_if_sta *ifsta;
2399 int res;
60f8b39c 2400
9c6bd790
JB		 2401 if (len > IEEE80211_MAX_SSID_LEN)
2402 return -EINVAL;
2403
2404 ifsta = &sdata->u.sta;
2405
2406 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2407 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2408 memcpy(ifsta->ssid, ssid, len);
2409 ifsta->ssid_len = len;
2410 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2411
2412 res = 0;
2413 /*
2414 * Hack! MLME code needs to be cleaned up to have different
2415 * entry points for configuration and internal selection change
2416 */
2417 if (netif_running(sdata->dev))
2418 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2419 if (res) {
2420 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2421 "the low-level driver\n", sdata->dev->name);
2422 return res;
60f8b39c
JB		 2423 }
2424 }
60f8b39c 2425
9c6bd790
JB		 2426 if (len)
2427 ifsta->flags |= IEEE80211_STA_SSID_SET;
2428 else
2429 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2430
9c6bd790
JB		 2431 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
2432 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2433 ifsta->ibss_join_req = jiffies;
2434 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2435 return ieee80211_sta_find_ibss(sdata, ifsta);
2436 }
2437
2438 return 0;
2439}
2440
2441int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2442{
2443 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2444 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2445 *len = ifsta->ssid_len;
2446 return 0;
2447}
2448
2449int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2450{
2451 struct ieee80211_if_sta *ifsta;
2452 int res;
2453
2454 ifsta = &sdata->u.sta;
2455
2456 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2457 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2458 res = 0;
2459 /*
2460 * Hack! See also ieee80211_sta_set_ssid.
60f8b39c 2461 */
9c6bd790
JB		 2462 if (netif_running(sdata->dev))
2463 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2464 if (res) {
2465 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2466 "the low-level driver\n", sdata->dev->name);
2467 return res;
2468 }
2469 }
60f8b39c 2470
9c6bd790
JB		 2471 if (is_valid_ether_addr(bssid))
2472 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2473 else
2474 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2475
2476 return 0;
2477}
2478
2479int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2480{
2481 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2482
2483 kfree(ifsta->extra_ie);
2484 if (len == 0) {
2485 ifsta->extra_ie = NULL;
2486 ifsta->extra_ie_len = 0;
60f8b39c 2487 return 0;
60f8b39c 2488 }
9c6bd790
JB		 2489 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2490 if (!ifsta->extra_ie) {
2491 ifsta->extra_ie_len = 0;
2492 return -ENOMEM;
2493 }
2494 memcpy(ifsta->extra_ie, ie, len);
2495 ifsta->extra_ie_len = len;
2496 return 0;
60f8b39c
JB		 2497}
2498
f698d856 2499int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2500{
f0706e82
JB		 2501 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2502
f4ea83dd 2503 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2504 sdata->dev->name, reason);
f0706e82 2505
51fb61e7
JB		 2506 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2507 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 2508 return -EINVAL;
2509
aa458d17 2510 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2511 return 0;
2512}
2513
f698d856 2514int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2515{
f0706e82
JB		 2516 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2517
f4ea83dd 2518 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2519 sdata->dev->name, reason);
f0706e82 2520
51fb61e7 2521 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2522 return -EINVAL;
2523
d6f2da5b 2524 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2525 return -1;
2526
aa458d17 2527 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2528 return 0;
2529}
84363e6e 2530
9c6bd790
JB		 2531/* scan finished notification */
2532void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2533{
2534 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2535 struct ieee80211_if_sta *ifsta;
2536
2537 if (sdata && sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
2538 ifsta = &sdata->u.sta;
2539 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2540 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2541 !ieee80211_sta_active_ibss(sdata)))
2542 ieee80211_sta_find_ibss(sdata, ifsta);
2543 }
2544
2545 /* Restart STA timers */
2546 rcu_read_lock();
2547 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2548 ieee80211_restart_sta_timer(sdata);
2549 rcu_read_unlock();
2550}
2551
2552/* driver notification call */
84363e6e
MA		 2553void ieee80211_notify_mac(struct ieee80211_hw *hw,
2554 enum ieee80211_notification_types notif_type)
2555{
2556 struct ieee80211_local *local = hw_to_local(hw);
2557 struct ieee80211_sub_if_data *sdata;
2558
2559 switch (notif_type) {
2560 case IEEE80211_NOTIFY_RE_ASSOC:
2561 rcu_read_lock();
2562 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3e122be0
JB		 2563 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2564 continue;
84363e6e 2565
f698d856 2566 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
84363e6e
MA		 2567 }
2568 rcu_read_unlock();
2569 break;
2570 }
2571}
2572EXPORT_SYMBOL(ieee80211_notify_mac);
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