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Merge branch 'for-2.6.28' of git://linux-nfs.org/~bfields/linux
[linux-2.6-block.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
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,
c2b13452 624 struct ieee80211_bss *bss)
50c4afb9
JL		 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{
74af0250
LT		 653 char *buf;
654 size_t len;
655 int i;
f0706e82
JB		 656 union iwreq_data wrqu;
657
74af0250
LT		 658 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
659 return;
660
661 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
662 ifsta->assocresp_ies_len), GFP_KERNEL);
663 if (!buf)
664 return;
665
666 len = sprintf(buf, "ASSOCINFO(");
f0706e82 667 if (ifsta->assocreq_ies) {
74af0250
LT		 668 len += sprintf(buf + len, "ReqIEs=");
669 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
670 len += sprintf(buf + len, "%02x",
671 ifsta->assocreq_ies[i]);
672 }
f0706e82 673 }
087d833e 674 if (ifsta->assocresp_ies) {
74af0250
LT		 675 if (ifsta->assocreq_ies)
676 len += sprintf(buf + len, " ");
677 len += sprintf(buf + len, "RespIEs=");
678 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
679 len += sprintf(buf + len, "%02x",
680 ifsta->assocresp_ies[i]);
681 }
f0706e82 682 }
74af0250
LT		 683 len += sprintf(buf + len, ")");
684
685 if (len > IW_CUSTOM_MAX) {
686 len = sprintf(buf, "ASSOCRESPIE=");
687 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
688 len += sprintf(buf + len, "%02x",
689 ifsta->assocresp_ies[i]);
690 }
691 }
692
ad788b5e
JL		 693 if (len <= IW_CUSTOM_MAX) {
694 memset(&wrqu, 0, sizeof(wrqu));
695 wrqu.data.length = len;
696 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
697 }
74af0250
LT		 698
699 kfree(buf);
f0706e82
JB		 700}
701
702
f698d856 703static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
f5e5bf25 704 struct ieee80211_if_sta *ifsta)
f0706e82 705{
471b3efd 706 struct ieee80211_local *local = sdata->local;
38668c05 707 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
471b3efd 708 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 709
c2b13452 710 struct ieee80211_bss *bss;
d6f2da5b 711
f5e5bf25 712 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 713
05c914fe 714 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f5e5bf25 715 return;
21c0cbe7 716
f5e5bf25
TW		 717 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
718 conf->channel->center_freq,
719 ifsta->ssid, ifsta->ssid_len);
720 if (bss) {
721 /* set timing information */
722 sdata->bss_conf.beacon_int = bss->beacon_int;
723 sdata->bss_conf.timestamp = bss->timestamp;
724 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 725
f5e5bf25 726 changed |= ieee80211_handle_bss_capability(sdata, bss);
9ac19a90
JB		 727
728 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 729 }
730
9ac19a90
JB		 731 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
732 changed |= BSS_CHANGED_HT;
733 sdata->bss_conf.assoc_ht = 1;
734 sdata->bss_conf.ht_conf = &conf->ht_conf;
735 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
f0706e82 736 }
3434fbd3 737
9ac19a90
JB		 738 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
739 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
740 ieee80211_sta_send_associnfo(sdata, ifsta);
9306102e 741
9ac19a90
JB		 742 ifsta->last_probe = jiffies;
743 ieee80211_led_assoc(local, 1);
9306102e 744
9ac19a90 745 sdata->bss_conf.assoc = 1;
96dd22ac
JB		 746 /*
747 * For now just always ask the driver to update the basic rateset
748 * when we have associated, we aren't checking whether it actually
749 * changed or not.
750 */
751 changed |= BSS_CHANGED_BASIC_RATES;
9ac19a90 752 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82 753
9ac19a90
JB		 754 netif_tx_start_all_queues(sdata->dev);
755 netif_carrier_on(sdata->dev);
f0706e82 756
9ac19a90 757 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 758}
759
9ac19a90
JB		 760static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
761 struct ieee80211_if_sta *ifsta)
f0706e82 762{
9ac19a90 763 DECLARE_MAC_BUF(mac);
f0706e82 764
9ac19a90
JB		 765 ifsta->direct_probe_tries++;
766 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
767 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
768 sdata->dev->name, print_mac(mac, ifsta->bssid));
769 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 770 return;
771 }
f0706e82 772
9ac19a90
JB		 773 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
774 sdata->dev->name, print_mac(mac, ifsta->bssid),
775 ifsta->direct_probe_tries);
f0706e82 776
9ac19a90 777 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 778
9ac19a90
JB		 779 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
780
781 /* Direct probe is sent to broadcast address as some APs
782 * will not answer to direct packet in unassociated state.
783 */
784 ieee80211_send_probe_req(sdata, NULL,
785 ifsta->ssid, ifsta->ssid_len);
786
787 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 788}
f0706e82 789
9ac19a90
JB		 790
791static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
792 struct ieee80211_if_sta *ifsta)
f0706e82 793{
9ac19a90 794 DECLARE_MAC_BUF(mac);
f0706e82 795
9ac19a90
JB		 796 ifsta->auth_tries++;
797 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
798 printk(KERN_DEBUG "%s: authentication with AP %s"
799 " timed out\n",
800 sdata->dev->name, print_mac(mac, ifsta->bssid));
801 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 802 return;
803 }
f0706e82 804
9ac19a90
JB		 805 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
806 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
807 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 808
9ac19a90
JB		 809 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
810
811 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 812}
813
aa458d17
TW		 814static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
815 struct ieee80211_if_sta *ifsta, bool deauth,
816 bool self_disconnected, u16 reason)
817{
818 struct ieee80211_local *local = sdata->local;
819 struct sta_info *sta;
f5e5bf25 820 u32 changed = BSS_CHANGED_ASSOC;
aa458d17
TW		 821
822 rcu_read_lock();
823
824 sta = sta_info_get(local, ifsta->bssid);
825 if (!sta) {
826 rcu_read_unlock();
827 return;
828 }
829
830 if (deauth) {
831 ifsta->direct_probe_tries = 0;
832 ifsta->auth_tries = 0;
833 }
834 ifsta->assoc_scan_tries = 0;
835 ifsta->assoc_tries = 0;
836
24e64622 837 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 838 netif_carrier_off(sdata->dev);
839
17741cdc 840 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
aa458d17
TW		 841
842 if (self_disconnected) {
843 if (deauth)
ef422bc0
JB		 844 ieee80211_send_deauth_disassoc(sdata,
845 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 846 else
ef422bc0
JB		 847 ieee80211_send_deauth_disassoc(sdata,
848 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 849 }
850
f5e5bf25
TW		 851 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
852 changed |= ieee80211_reset_erp_info(sdata);
853
854 if (sdata->bss_conf.assoc_ht)
855 changed |= BSS_CHANGED_HT;
856
857 sdata->bss_conf.assoc_ht = 0;
858 sdata->bss_conf.ht_conf = NULL;
859 sdata->bss_conf.ht_bss_conf = NULL;
860
861 ieee80211_led_assoc(local, 0);
862 sdata->bss_conf.assoc = 0;
863
864 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17
TW		 865
866 if (self_disconnected)
867 ifsta->state = IEEE80211_STA_MLME_DISABLED;
868
869 sta_info_unlink(&sta);
870
871 rcu_read_unlock();
872
873 sta_info_destroy(sta);
874}
f0706e82 875
9ac19a90
JB		 876static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
877{
878 if (!sdata || !sdata->default_key ||
879 sdata->default_key->conf.alg != ALG_WEP)
880 return 0;
881 return 1;
882}
883
f698d856 884static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 885 struct ieee80211_if_sta *ifsta)
886{
f698d856 887 struct ieee80211_local *local = sdata->local;
c2b13452 888 struct ieee80211_bss *bss;
5b98b1f7
JB		 889 int bss_privacy;
890 int wep_privacy;
891 int privacy_invoked;
f0706e82 892
5b98b1f7 893 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 894 return 0;
895
f698d856 896 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 897 local->hw.conf.channel->center_freq,
cffdd30d 898 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 899 if (!bss)
900 return 0;
901
5b98b1f7 902 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 903 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 904 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 905
3e122be0 906 ieee80211_rx_bss_put(local, bss);
f0706e82 907
5b98b1f7
JB		 908 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
909 return 0;
910
911 return 1;
f0706e82
JB		 912}
913
f698d856 914static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 915 struct ieee80211_if_sta *ifsta)
916{
0795af57
JP		 917 DECLARE_MAC_BUF(mac);
918
f0706e82
JB		 919 ifsta->assoc_tries++;
920 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 921 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 922 " timed out\n",
f698d856 923 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 924 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 925 return;
926 }
927
48c2fc59 928 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0795af57 929 printk(KERN_DEBUG "%s: associate with AP %s\n",
f698d856
JBG		 930 sdata->dev->name, print_mac(mac, ifsta->bssid));
931 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 932 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 933 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 934 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 935 return;
936 }
937
f698d856 938 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 939
940 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
941}
942
943
f698d856 944static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 945 struct ieee80211_if_sta *ifsta)
946{
f698d856 947 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 948 struct sta_info *sta;
949 int disassoc;
0795af57 950 DECLARE_MAC_BUF(mac);
f0706e82
JB		 951
952 /* TODO: start monitoring current AP signal quality and number of
953 * missed beacons. Scan other channels every now and then and search
954 * for better APs. */
955 /* TODO: remove expired BSSes */
956
48c2fc59 957 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 958
d0709a65
JB		 959 rcu_read_lock();
960
f0706e82
JB		 961 sta = sta_info_get(local, ifsta->bssid);
962 if (!sta) {
0795af57 963 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
f698d856 964 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 965 disassoc = 1;
966 } else {
967 disassoc = 0;
968 if (time_after(jiffies,
969 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 970 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 971 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 972 "current AP %s - assume out of "
f0706e82 973 "range\n",
f698d856 974 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 975 disassoc = 1;
d6f2da5b 976 } else
f698d856 977 ieee80211_send_probe_req(sdata, ifsta->bssid,
4dfe51e1
JB		 978 ifsta->ssid,
979 ifsta->ssid_len);
d6f2da5b 980 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 981 } else {
d6f2da5b 982 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 983 if (time_after(jiffies, ifsta->last_probe +
984 IEEE80211_PROBE_INTERVAL)) {
985 ifsta->last_probe = jiffies;
f698d856 986 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 987 ifsta->ssid,
988 ifsta->ssid_len);
989 }
990 }
f0706e82 991 }
d0709a65
JB		 992
993 rcu_read_unlock();
994
60f8b39c
JB		 995 if (disassoc)
996 ieee80211_set_disassoc(sdata, ifsta, true, true,
997 WLAN_REASON_PREV_AUTH_NOT_VALID);
998 else
999 mod_timer(&ifsta->timer, jiffies +
1000 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 1001}
1002
1003
f698d856 1004static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1005 struct ieee80211_if_sta *ifsta)
1006{
f698d856 1007 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1008 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1009 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1010}
1011
1012
f698d856 1013static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1014 struct ieee80211_if_sta *ifsta,
1015 struct ieee80211_mgmt *mgmt,
1016 size_t len)
1017{
1018 u8 *pos;
1019 struct ieee802_11_elems elems;
1020
f0706e82 1021 pos = mgmt->u.auth.variable;
67a4cce4 1022 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1023 if (!elems.challenge)
f0706e82 1024 return;
f698d856 1025 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1026 elems.challenge_len + 2, 1);
1027}
1028
f698d856 1029static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1030 struct ieee80211_if_sta *ifsta,
1031 struct ieee80211_mgmt *mgmt,
1032 size_t len)
1033{
f0706e82 1034 u16 auth_alg, auth_transaction, status_code;
0795af57 1035 DECLARE_MAC_BUF(mac);
f0706e82 1036
48c2fc59 1037 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
05c914fe 1038 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82 1039 return;
f0706e82 1040
f4ea83dd 1041 if (len < 24 + 6)
f0706e82 1042 return;
f0706e82 1043
05c914fe 1044 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1045 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1046 return;
f0706e82 1047
05c914fe 1048 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1049 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1050 return;
f0706e82
JB		 1051
1052 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1053 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1054 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1055
05c914fe 1056 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
135a2110
JB		 1057 /*
1058 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1059 * networks and most implementations do not seem to use it.
1060 * However, try to reply to authentication attempts if someone
1061 * has actually implemented this.
135a2110 1062 */
f4ea83dd 1063 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1064 return;
f698d856 1065 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1066 }
1067
1068 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1069 auth_transaction != ifsta->auth_transaction)
f0706e82 1070 return;
f0706e82
JB		 1071
1072 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1073 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1074 u8 algs[3];
1075 const int num_algs = ARRAY_SIZE(algs);
1076 int i, pos;
1077 algs[0] = algs[1] = algs[2] = 0xff;
1078 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1079 algs[0] = WLAN_AUTH_OPEN;
1080 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1081 algs[1] = WLAN_AUTH_SHARED_KEY;
1082 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1083 algs[2] = WLAN_AUTH_LEAP;
1084 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1085 pos = 0;
1086 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1087 pos = 1;
1088 else
1089 pos = 2;
1090 for (i = 0; i < num_algs; i++) {
1091 pos++;
1092 if (pos >= num_algs)
1093 pos = 0;
1094 if (algs[pos] == ifsta->auth_alg ||
1095 algs[pos] == 0xff)
1096 continue;
1097 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1098 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1099 continue;
1100 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1101 break;
1102 }
1103 }
1104 return;
1105 }
1106
1107 switch (ifsta->auth_alg) {
1108 case WLAN_AUTH_OPEN:
1109 case WLAN_AUTH_LEAP:
f698d856 1110 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1111 break;
1112 case WLAN_AUTH_SHARED_KEY:
1113 if (ifsta->auth_transaction == 4)
f698d856 1114 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1115 else
f698d856 1116 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1117 break;
1118 }
1119}
1120
1121
f698d856 1122static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1123 struct ieee80211_if_sta *ifsta,
1124 struct ieee80211_mgmt *mgmt,
1125 size_t len)
1126{
1127 u16 reason_code;
0795af57 1128 DECLARE_MAC_BUF(mac);
f0706e82 1129
f4ea83dd 1130 if (len < 24 + 2)
f0706e82 1131 return;
f0706e82 1132
f4ea83dd 1133 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1134 return;
f0706e82
JB		 1135
1136 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1137
988c0f72 1138 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 1139 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 1140
48c2fc59
TW		 1141 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1142 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1143 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1144 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1145 mod_timer(&ifsta->timer, jiffies +
1146 IEEE80211_RETRY_AUTH_INTERVAL);
1147 }
1148
aa458d17 1149 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1150 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1151}
1152
1153
f698d856 1154static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1155 struct ieee80211_if_sta *ifsta,
1156 struct ieee80211_mgmt *mgmt,
1157 size_t len)
1158{
1159 u16 reason_code;
0795af57 1160 DECLARE_MAC_BUF(mac);
f0706e82 1161
f4ea83dd 1162 if (len < 24 + 2)
f0706e82 1163 return;
f0706e82 1164
f4ea83dd 1165 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1166 return;
f0706e82
JB		 1167
1168 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1169
d6f2da5b 1170 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 1171 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 1172
48c2fc59
TW		 1173 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1174 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1175 mod_timer(&ifsta->timer, jiffies +
1176 IEEE80211_RETRY_AUTH_INTERVAL);
1177 }
1178
aa458d17 1179 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
f0706e82
JB		 1180}
1181
1182
471b3efd 1183static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1184 struct ieee80211_if_sta *ifsta,
1185 struct ieee80211_mgmt *mgmt,
1186 size_t len,
1187 int reassoc)
1188{
471b3efd 1189 struct ieee80211_local *local = sdata->local;
8318d78a 1190 struct ieee80211_supported_band *sband;
f0706e82 1191 struct sta_info *sta;
8318d78a 1192 u64 rates, basic_rates;
f0706e82
JB		 1193 u16 capab_info, status_code, aid;
1194 struct ieee802_11_elems elems;
471b3efd 1195 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1196 u8 *pos;
1197 int i, j;
0795af57 1198 DECLARE_MAC_BUF(mac);
8318d78a 1199 bool have_higher_than_11mbit = false;
f0706e82
JB		 1200
1201 /* AssocResp and ReassocResp have identical structure, so process both
1202 * of them in this function. */
1203
48c2fc59 1204 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1205 return;
f0706e82 1206
f4ea83dd 1207 if (len < 24 + 6)
f0706e82 1208 return;
f0706e82 1209
f4ea83dd 1210 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1211 return;
f0706e82
JB		 1212
1213 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1214 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1215 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1216
0795af57 1217 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1218 "status=%d aid=%d)\n",
f698d856 1219 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1220 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1221
1222 if (status_code != WLAN_STATUS_SUCCESS) {
1223 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1224 sdata->dev->name, status_code);
8a69aa93
DD		 1225 /* if this was a reassociation, ensure we try a "full"
1226 * association next time. This works around some broken APs
1227 * which do not correctly reject reassociation requests. */
d6f2da5b 1228 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1229 return;
1230 }
1231
1dd84aa2
JB		 1232 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1233 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1234 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1235 aid &= ~(BIT(15) | BIT(14));
1236
f0706e82 1237 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1238 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1239
1240 if (!elems.supp_rates) {
1241 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1242 sdata->dev->name);
f0706e82
JB		 1243 return;
1244 }
1245
f698d856 1246 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1247 ifsta->aid = aid;
1248 ifsta->ap_capab = capab_info;
1249
1250 kfree(ifsta->assocresp_ies);
1251 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1252 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1253 if (ifsta->assocresp_ies)
1254 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1255
d0709a65
JB		 1256 rcu_read_lock();
1257
f0706e82
JB		 1258 /* Add STA entry for the AP */
1259 sta = sta_info_get(local, ifsta->bssid);
1260 if (!sta) {
c2b13452 1261 struct ieee80211_bss *bss;
73651ee6 1262 int err;
d0709a65 1263
73651ee6
JB		 1264 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1265 if (!sta) {
1266 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1267 " the AP\n", sdata->dev->name);
d0709a65 1268 rcu_read_unlock();
f0706e82
JB		 1269 return;
1270 }
60f8b39c
JB		 1271 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1272 local->hw.conf.channel->center_freq,
1273 ifsta->ssid, ifsta->ssid_len);
1274 if (bss) {
1275 sta->last_signal = bss->signal;
1276 sta->last_qual = bss->qual;
1277 sta->last_noise = bss->noise;
1278 ieee80211_rx_bss_put(local, bss);
1279 }
f709fc69 1280
60f8b39c
JB		 1281 err = sta_info_insert(sta);
1282 if (err) {
1283 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1284 " the AP (error %d)\n", sdata->dev->name, err);
1285 rcu_read_unlock();
1286 return;
f709fc69 1287 }
60f8b39c
JB		 1288 /* update new sta with its last rx activity */
1289 sta->last_rx = jiffies;
f709fc69 1290 }
f709fc69 1291
60f8b39c
JB		 1292 /*
1293 * FIXME: Do we really need to update the sta_info's information here?
1294 * We already know about the AP (we found it in our list) so it
1295 * should already be filled with the right info, no?
1296 * As is stands, all this is racy because typically we assume
1297 * the information that is filled in here (except flags) doesn't
1298 * change while a STA structure is alive. As such, it should move
1299 * to between the sta_info_alloc() and sta_info_insert() above.
1300 */
f709fc69 1301
60f8b39c
JB		 1302 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1303 WLAN_STA_AUTHORIZED);
05e5e883 1304
60f8b39c
JB		 1305 rates = 0;
1306 basic_rates = 0;
1307 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1308
60f8b39c
JB		 1309 for (i = 0; i < elems.supp_rates_len; i++) {
1310 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f709fc69 1311
60f8b39c
JB		 1312 if (rate > 110)
1313 have_higher_than_11mbit = true;
1314
1315 for (j = 0; j < sband->n_bitrates; j++) {
1316 if (sband->bitrates[j].bitrate == rate)
1317 rates |= BIT(j);
1318 if (elems.supp_rates[i] & 0x80)
1319 basic_rates |= BIT(j);
f709fc69 1320 }
f709fc69
LCC		 1321 }
1322
60f8b39c
JB		 1323 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1324 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82 1325
60f8b39c
JB		 1326 if (rate > 110)
1327 have_higher_than_11mbit = true;
f0706e82 1328
60f8b39c
JB		 1329 for (j = 0; j < sband->n_bitrates; j++) {
1330 if (sband->bitrates[j].bitrate == rate)
1331 rates |= BIT(j);
1332 if (elems.ext_supp_rates[i] & 0x80)
1333 basic_rates |= BIT(j);
1334 }
1ebebea8 1335 }
f0706e82 1336
323ce79a 1337 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
96dd22ac 1338 sdata->bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1339
1340 /* cf. IEEE 802.11 9.2.12 */
1341 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1342 have_higher_than_11mbit)
1343 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1344 else
1345 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1346
60f8b39c
JB		 1347 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1348 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1349 struct ieee80211_ht_bss_info bss_info;
1350 ieee80211_ht_cap_ie_to_ht_info(
687c7c08 1351 elems.ht_cap_elem, &sta->sta.ht_info);
60f8b39c 1352 ieee80211_ht_addt_info_ie_to_ht_bss_info(
60f8b39c 1353 elems.ht_info_elem, &bss_info);
687c7c08 1354 ieee80211_handle_ht(local, 1, &sta->sta.ht_info, &bss_info);
60f8b39c 1355 }
f0706e82 1356
4b7679a5 1357 rate_control_rate_init(sta);
f0706e82 1358
60f8b39c
JB		 1359 if (elems.wmm_param) {
1360 set_sta_flags(sta, WLAN_STA_WME);
1361 rcu_read_unlock();
1362 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1363 elems.wmm_param_len);
1364 } else
1365 rcu_read_unlock();
f0706e82 1366
60f8b39c
JB		 1367 /* set AID and assoc capability,
1368 * ieee80211_set_associated() will tell the driver */
1369 bss_conf->aid = aid;
1370 bss_conf->assoc_capability = capab_info;
1371 ieee80211_set_associated(sdata, ifsta);
f0706e82 1372
60f8b39c 1373 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1374}
1375
1376
f698d856 1377static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a 1378 struct ieee80211_if_sta *ifsta,
c2b13452 1379 struct ieee80211_bss *bss)
a607268a 1380{
f698d856 1381 struct ieee80211_local *local = sdata->local;
a607268a
BR		 1382 int res, rates, i, j;
1383 struct sk_buff *skb;
1384 struct ieee80211_mgmt *mgmt;
a607268a 1385 u8 *pos;
a607268a 1386 struct ieee80211_supported_band *sband;
507b06d0 1387 union iwreq_data wrqu;
a607268a
BR		 1388
1389 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1390
1391 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1392 sta_info_flush_delayed(sdata);
a607268a
BR		 1393
1394 if (local->ops->reset_tsf) {
1395 /* Reset own TSF to allow time synchronization work. */
1396 local->ops->reset_tsf(local_to_hw(local));
1397 }
1398 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1399 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1400 if (res)
1401 return res;
1402
1403 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1404
a607268a
BR		 1405 sdata->drop_unencrypted = bss->capability &
1406 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1407
f698d856 1408 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1409
be038b37
AK		 1410 if (res)
1411 return res;
a607268a 1412
9d139c81 1413 /* Build IBSS probe response */
a607268a 1414 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 1415 if (skb) {
a607268a
BR		 1416 skb_reserve(skb, local->hw.extra_tx_headroom);
1417
1418 mgmt = (struct ieee80211_mgmt *)
1419 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1420 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 1421 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1422 IEEE80211_STYPE_PROBE_RESP);
a607268a 1423 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 1424 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 1425 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1426 mgmt->u.beacon.beacon_int =
1427 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 1428 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 1429 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1430
1431 pos = skb_put(skb, 2 + ifsta->ssid_len);
1432 *pos++ = WLAN_EID_SSID;
1433 *pos++ = ifsta->ssid_len;
1434 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1435
1436 rates = bss->supp_rates_len;
1437 if (rates > 8)
1438 rates = 8;
1439 pos = skb_put(skb, 2 + rates);
1440 *pos++ = WLAN_EID_SUPP_RATES;
1441 *pos++ = rates;
1442 memcpy(pos, bss->supp_rates, rates);
1443
1444 if (bss->band == IEEE80211_BAND_2GHZ) {
1445 pos = skb_put(skb, 2 + 1);
1446 *pos++ = WLAN_EID_DS_PARAMS;
1447 *pos++ = 1;
1448 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1449 }
1450
1451 pos = skb_put(skb, 2 + 2);
1452 *pos++ = WLAN_EID_IBSS_PARAMS;
1453 *pos++ = 2;
1454 /* FIX: set ATIM window based on scan results */
1455 *pos++ = 0;
1456 *pos++ = 0;
1457
1458 if (bss->supp_rates_len > 8) {
1459 rates = bss->supp_rates_len - 8;
1460 pos = skb_put(skb, 2 + rates);
1461 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1462 *pos++ = rates;
1463 memcpy(pos, &bss->supp_rates[8], rates);
1464 }
1465
9d139c81 1466 ifsta->probe_resp = skb;
e039fa4a 1467
9d139c81
JB		 1468 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1469 }
a607268a 1470
9d139c81
JB		 1471 rates = 0;
1472 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1473 for (i = 0; i < bss->supp_rates_len; i++) {
1474 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1475 for (j = 0; j < sband->n_bitrates; j++)
1476 if (sband->bitrates[j].bitrate == bitrate)
1477 rates |= BIT(j);
a607268a 1478 }
9d139c81
JB		 1479 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1480
b079ada7 1481 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1482
48c2fc59 1483 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1484 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1485
4492bea6
EG		 1486 ieee80211_led_assoc(local, true);
1487
507b06d0
DW		 1488 memset(&wrqu, 0, sizeof(wrqu));
1489 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1490 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1491
1492 return res;
1493}
1494
98c8fccf
JB		 1495static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1496 struct ieee80211_mgmt *mgmt,
1497 size_t len,
1498 struct ieee80211_rx_status *rx_status,
1499 struct ieee802_11_elems *elems,
1500 bool beacon)
1501{
1502 struct ieee80211_local *local = sdata->local;
1503 int freq;
c2b13452 1504 struct ieee80211_bss *bss;
98c8fccf
JB		 1505 struct sta_info *sta;
1506 struct ieee80211_channel *channel;
1507 u64 beacon_timestamp, rx_timestamp;
1508 u64 supp_rates = 0;
1509 enum ieee80211_band band = rx_status->band;
1510 DECLARE_MAC_BUF(mac);
1511 DECLARE_MAC_BUF(mac2);
1512
1513 if (elems->ds_params && elems->ds_params_len == 1)
1514 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1515 else
1516 freq = rx_status->freq;
1517
1518 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1519
1520 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1521 return;
1522
05c914fe 1523 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
98c8fccf
JB		 1524 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1525 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1526
1527 rcu_read_lock();
1528
1529 sta = sta_info_get(local, mgmt->sa);
1530 if (sta) {
1531 u64 prev_rates;
1532
323ce79a 1533 prev_rates = sta->sta.supp_rates[band];
98c8fccf 1534 /* make sure mandatory rates are always added */
323ce79a 1535 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 1536 ieee80211_mandatory_rates(local, band);
98c8fccf
JB		 1537
1538#ifdef CONFIG_MAC80211_IBSS_DEBUG
323ce79a 1539 if (sta->sta.supp_rates[band] != prev_rates)
98c8fccf
JB		 1540 printk(KERN_DEBUG "%s: updated supp_rates set "
1541 "for %s based on beacon info (0x%llx | "
1542 "0x%llx -> 0x%llx)\n",
17741cdc
JB		 1543 sdata->dev->name,
1544 print_mac(mac, sta->sta.addr),
98c8fccf
JB		 1545 (unsigned long long) prev_rates,
1546 (unsigned long long) supp_rates,
323ce79a 1547 (unsigned long long) sta->sta.supp_rates[band]);
98c8fccf
JB		 1548#endif
1549 } else {
1550 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1551 mgmt->sa, supp_rates);
1552 }
1553
1554 rcu_read_unlock();
1555 }
1556
1557 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1558 freq, beacon);
1559 if (!bss)
1560 return;
1561
1562 /* was just updated in ieee80211_bss_info_update */
1563 beacon_timestamp = bss->timestamp;
1564
30b89b0f
JB		 1565 /*
1566 * In STA mode, the remaining parameters should not be overridden
1567 * by beacons because they're not necessarily accurate there.
1568 */
05c914fe 1569 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
9859b81e 1570 bss->last_probe_resp && beacon) {
3e122be0 1571 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1572 return;
1573 }
1574
9d9bf77d 1575 /* check if we need to merge IBSS */
05c914fe 1576 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
fba4a1e6 1577 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1578 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1579 elems->ssid_len == sdata->u.sta.ssid_len &&
1580 memcmp(elems->ssid, sdata->u.sta.ssid,
1581 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1582 if (rx_status->flag & RX_FLAG_TSFT) {
1583 /* in order for correct IBSS merging we need mactime
1584 *
1585 * since mactime is defined as the time the first data
1586 * symbol of the frame hits the PHY, and the timestamp
1587 * of the beacon is defined as "the time that the data
1588 * symbol containing the first bit of the timestamp is
1589 * transmitted to the PHY plus the transmitting STA’s
1590 * delays through its local PHY from the MAC-PHY
1591 * interface to its interface with the WM"
1592 * (802.11 11.1.2) - equals the time this bit arrives at
1593 * the receiver - we have to take into account the
1594 * offset between the two.
1595 * e.g: at 1 MBit that means mactime is 192 usec earlier
1596 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1597 */
8e1535d5 1598 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 1599 bitrates[rx_status->rate_idx].bitrate;
1600 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1601 } else if (local && local->ops && local->ops->get_tsf)
1602 /* second best option: get current TSF */
1603 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1604 else
1605 /* can't merge without knowing the TSF */
1606 rx_timestamp = -1LLU;
1607#ifdef CONFIG_MAC80211_IBSS_DEBUG
1608 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1609 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1610 print_mac(mac, mgmt->sa),
1611 print_mac(mac2, mgmt->bssid),
1612 (unsigned long long)rx_timestamp,
1613 (unsigned long long)beacon_timestamp,
1614 (unsigned long long)(rx_timestamp - beacon_timestamp),
1615 jiffies);
1616#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1617 if (beacon_timestamp > rx_timestamp) {
576fdeae 1618#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 1619 printk(KERN_DEBUG "%s: beacon TSF higher than "
1620 "local TSF - IBSS merge with BSSID %s\n",
f698d856 1621 sdata->dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 1622#endif
f698d856
JBG		 1623 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1624 ieee80211_ibss_add_sta(sdata, NULL,
87291c02 1625 mgmt->bssid, mgmt->sa,
8e1535d5 1626 supp_rates);
9d9bf77d
BR		 1627 }
1628 }
1629
3e122be0 1630 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1631}
1632
1633
f698d856 1634static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1635 struct ieee80211_mgmt *mgmt,
1636 size_t len,
1637 struct ieee80211_rx_status *rx_status)
1638{
ae6a44e3
EK		 1639 size_t baselen;
1640 struct ieee802_11_elems elems;
9859b81e 1641 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1642
8e7cdbb6
TW		 1643 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1644 return; /* ignore ProbeResp to foreign address */
1645
ae6a44e3
EK		 1646 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1647 if (baselen > len)
1648 return;
1649
1650 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1651 &elems);
1652
98c8fccf 1653 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1654
1655 /* direct probe may be part of the association flow */
1656 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1657 &ifsta->request)) {
1658 printk(KERN_DEBUG "%s direct probe responded\n",
1659 sdata->dev->name);
1660 ieee80211_authenticate(sdata, ifsta);
1661 }
f0706e82
JB		 1662}
1663
1664
f698d856 1665static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1666 struct ieee80211_mgmt *mgmt,
1667 size_t len,
1668 struct ieee80211_rx_status *rx_status)
1669{
f0706e82 1670 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1671 size_t baselen;
1672 struct ieee802_11_elems elems;
f698d856 1673 struct ieee80211_local *local = sdata->local;
d3c990fb 1674 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 1675 u32 changed = 0;
f0706e82 1676
ae6a44e3
EK		 1677 /* Process beacon from the current BSS */
1678 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1679 if (baselen > len)
1680 return;
1681
1682 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1683
98c8fccf 1684 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1685
05c914fe 1686 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1687 return;
1688 ifsta = &sdata->u.sta;
1689
d6f2da5b 1690 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1691 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1692 return;
1693
fe3fa827
JB		 1694 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1695 elems.wmm_param_len);
1696
5628221c 1697 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 1698 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 1699 else {
1700 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
1701 changed |= ieee80211_handle_protect_preamb(sdata, false,
1702 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
1703 }
f0706e82 1704
d3c990fb 1705 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 1706 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 1707 struct ieee80211_ht_bss_info bss_info;
1708
1709 ieee80211_ht_addt_info_ie_to_ht_bss_info(
d3c990fb 1710 elems.ht_info_elem, &bss_info);
38668c05
TW		 1711 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
1712 &bss_info);
d3c990fb
RR		 1713 }
1714
471b3efd 1715 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1716}
1717
1718
f698d856 1719static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1720 struct ieee80211_if_sta *ifsta,
1721 struct ieee80211_mgmt *mgmt,
1722 size_t len,
1723 struct ieee80211_rx_status *rx_status)
1724{
f698d856 1725 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1726 int tx_last_beacon;
1727 struct sk_buff *skb;
1728 struct ieee80211_mgmt *resp;
1729 u8 *pos, *end;
0795af57
JP		 1730 DECLARE_MAC_BUF(mac);
1731#ifdef CONFIG_MAC80211_IBSS_DEBUG
1732 DECLARE_MAC_BUF(mac2);
1733 DECLARE_MAC_BUF(mac3);
1734#endif
f0706e82 1735
05c914fe 1736 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
48c2fc59 1737 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 1738 len < 24 + 2 || !ifsta->probe_resp)
1739 return;
1740
1741 if (local->ops->tx_last_beacon)
1742 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1743 else
1744 tx_last_beacon = 1;
1745
1746#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1747 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1748 "%s (tx_last_beacon=%d)\n",
f698d856 1749 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
0795af57 1750 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 1751#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1752
1753 if (!tx_last_beacon)
1754 return;
1755
1756 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1757 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1758 return;
1759
1760 end = ((u8 *) mgmt) + len;
1761 pos = mgmt->u.probe_req.variable;
1762 if (pos[0] != WLAN_EID_SSID ||
1763 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 1764#ifdef CONFIG_MAC80211_IBSS_DEBUG
1765 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1766 "from %s\n",
f698d856 1767 sdata->dev->name, print_mac(mac, mgmt->sa));
f4ea83dd 1768#endif
f0706e82
JB		 1769 return;
1770 }
1771 if (pos[1] != 0 &&
1772 (pos[1] != ifsta->ssid_len ||
1773 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1774 /* Ignore ProbeReq for foreign SSID */
1775 return;
1776 }
1777
1778 /* Reply with ProbeResp */
0ec0b7ac 1779 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1780 if (!skb)
1781 return;
1782
1783 resp = (struct ieee80211_mgmt *) skb->data;
1784 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1785#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 1786 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
f698d856 1787 sdata->dev->name, print_mac(mac, resp->da));
f0706e82 1788#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 1789 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 1790}
1791
f698d856 1792void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 1793 struct ieee80211_rx_status *rx_status)
1794{
f698d856 1795 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1796 struct ieee80211_if_sta *ifsta;
1797 struct ieee80211_mgmt *mgmt;
1798 u16 fc;
1799
1800 if (skb->len < 24)
1801 goto fail;
1802
f0706e82
JB		 1803 ifsta = &sdata->u.sta;
1804
1805 mgmt = (struct ieee80211_mgmt *) skb->data;
1806 fc = le16_to_cpu(mgmt->frame_control);
1807
1808 switch (fc & IEEE80211_FCTL_STYPE) {
1809 case IEEE80211_STYPE_PROBE_REQ:
1810 case IEEE80211_STYPE_PROBE_RESP:
1811 case IEEE80211_STYPE_BEACON:
1812 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1813 case IEEE80211_STYPE_AUTH:
1814 case IEEE80211_STYPE_ASSOC_RESP:
1815 case IEEE80211_STYPE_REASSOC_RESP:
1816 case IEEE80211_STYPE_DEAUTH:
1817 case IEEE80211_STYPE_DISASSOC:
1818 skb_queue_tail(&ifsta->skb_queue, skb);
1819 queue_work(local->hw.workqueue, &ifsta->work);
1820 return;
f0706e82
JB		 1821 }
1822
1823 fail:
1824 kfree_skb(skb);
1825}
1826
f698d856 1827static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1828 struct sk_buff *skb)
1829{
1830 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 1831 struct ieee80211_if_sta *ifsta;
1832 struct ieee80211_mgmt *mgmt;
1833 u16 fc;
1834
f0706e82
JB		 1835 ifsta = &sdata->u.sta;
1836
1837 rx_status = (struct ieee80211_rx_status *) skb->cb;
1838 mgmt = (struct ieee80211_mgmt *) skb->data;
1839 fc = le16_to_cpu(mgmt->frame_control);
1840
1841 switch (fc & IEEE80211_FCTL_STYPE) {
1842 case IEEE80211_STYPE_PROBE_REQ:
f698d856 1843 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 1844 rx_status);
1845 break;
1846 case IEEE80211_STYPE_PROBE_RESP:
f698d856 1847 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1848 break;
1849 case IEEE80211_STYPE_BEACON:
f698d856 1850 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1851 break;
1852 case IEEE80211_STYPE_AUTH:
f698d856 1853 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1854 break;
1855 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 1856 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 1857 break;
1858 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 1859 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 1860 break;
1861 case IEEE80211_STYPE_DEAUTH:
f698d856 1862 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1863 break;
1864 case IEEE80211_STYPE_DISASSOC:
f698d856 1865 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1866 break;
1867 }
1868
1869 kfree_skb(skb);
1870}
1871
1872
f698d856 1873static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 1874{
f698d856 1875 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1876 int active = 0;
1877 struct sta_info *sta;
1878
d0709a65
JB		 1879 rcu_read_lock();
1880
1881 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1882 if (sta->sdata == sdata &&
f0706e82
JB		 1883 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1884 jiffies)) {
1885 active++;
1886 break;
1887 }
1888 }
d0709a65
JB		 1889
1890 rcu_read_unlock();
f0706e82
JB		 1891
1892 return active;
1893}
1894
1895
f698d856 1896static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1897 struct ieee80211_if_sta *ifsta)
1898{
1899 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1900
f698d856
JBG		 1901 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1902 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 1903 return;
1904
1905 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 1906 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
c2b13452 1907 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1908}
1909
1910
9c6bd790 1911static void ieee80211_sta_timer(unsigned long data)
f0706e82 1912{
60f8b39c
JB		 1913 struct ieee80211_sub_if_data *sdata =
1914 (struct ieee80211_sub_if_data *) data;
1915 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1916 struct ieee80211_local *local = sdata->local;
f0706e82 1917
60f8b39c
JB		 1918 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1919 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 1920}
1921
f698d856 1922static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1923 struct ieee80211_if_sta *ifsta)
1924{
f698d856 1925 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1926
1927 if (local->ops->reset_tsf) {
1928 /* Reset own TSF to allow time synchronization work. */
1929 local->ops->reset_tsf(local_to_hw(local));
1930 }
1931
1932 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1933
1934
1935 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1936 ifsta->auth_alg = WLAN_AUTH_OPEN;
1937 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1938 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1939 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1940 ifsta->auth_alg = WLAN_AUTH_LEAP;
1941 else
1942 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 1943 ifsta->auth_transaction = -1;
d6f2da5b 1944 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 1945 ifsta->assoc_scan_tries = 0;
9859b81e 1946 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 1947 ifsta->auth_tries = 0;
1948 ifsta->assoc_tries = 0;
24e64622 1949 netif_tx_stop_all_queues(sdata->dev);
f698d856 1950 netif_carrier_off(sdata->dev);
f0706e82
JB		 1951}
1952
1953
f0706e82
JB		 1954static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1955 const char *ssid, int ssid_len)
1956{
1957 int tmp, hidden_ssid;
1958
48225709
MW		 1959 if (ssid_len == ifsta->ssid_len &&
1960 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 1961 return 1;
1962
d6f2da5b 1963 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 1964 return 0;
1965
1966 hidden_ssid = 1;
1967 tmp = ssid_len;
1968 while (tmp--) {
1969 if (ssid[tmp] != '\0') {
1970 hidden_ssid = 0;
1971 break;
1972 }
1973 }
1974
1975 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1976 return 1;
1977
1978 if (ssid_len == 1 && ssid[0] == ' ')
1979 return 1;
1980
1981 return 0;
1982}
1983
f698d856 1984static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1985 struct ieee80211_if_sta *ifsta)
1986{
f698d856 1987 struct ieee80211_local *local = sdata->local;
c2b13452 1988 struct ieee80211_bss *bss;
8318d78a 1989 struct ieee80211_supported_band *sband;
f0706e82
JB		 1990 u8 bssid[ETH_ALEN], *pos;
1991 int i;
167ad6f7 1992 int ret;
0795af57 1993 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1994
1995#if 0
1996 /* Easier testing, use fixed BSSID. */
1997 memset(bssid, 0xfe, ETH_ALEN);
1998#else
1999 /* Generate random, not broadcast, locally administered BSSID. Mix in
2000 * own MAC address to make sure that devices that do not have proper
2001 * random number generator get different BSSID. */
2002 get_random_bytes(bssid, ETH_ALEN);
2003 for (i = 0; i < ETH_ALEN; i++)
f698d856 2004 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 2005 bssid[0] &= ~0x01;
2006 bssid[0] |= 0x02;
2007#endif
2008
0795af57 2009 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
f698d856 2010 sdata->dev->name, print_mac(mac, bssid));
f0706e82 2011
98c8fccf 2012 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2013 local->hw.conf.channel->center_freq,
cffdd30d 2014 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2015 if (!bss)
2016 return -ENOMEM;
2017
8318d78a
JB		 2018 bss->band = local->hw.conf.channel->band;
2019 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2020
2021 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2022 local->hw.conf.beacon_int = 100;
f0706e82 2023 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2024 bss->last_update = jiffies;
2025 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2026
2027 if (sdata->default_key)
f0706e82 2028 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2029 else
f0706e82 2030 sdata->drop_unencrypted = 0;
988c0f72 2031
8318d78a 2032 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2033 pos = bss->supp_rates;
8318d78a
JB		 2034 for (i = 0; i < sband->n_bitrates; i++) {
2035 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2036 *pos++ = (u8) (rate / 5);
2037 }
2038
f698d856 2039 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2040 ieee80211_rx_bss_put(local, bss);
167ad6f7 2041 return ret;
f0706e82
JB		 2042}
2043
2044
f698d856 2045static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2046 struct ieee80211_if_sta *ifsta)
2047{
f698d856 2048 struct ieee80211_local *local = sdata->local;
c2b13452 2049 struct ieee80211_bss *bss;
f0706e82
JB		 2050 int found = 0;
2051 u8 bssid[ETH_ALEN];
2052 int active_ibss;
0795af57
JP		 2053 DECLARE_MAC_BUF(mac);
2054 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2055
2056 if (ifsta->ssid_len == 0)
2057 return -EINVAL;
2058
f698d856 2059 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2060#ifdef CONFIG_MAC80211_IBSS_DEBUG
2061 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2062 sdata->dev->name, active_ibss);
f0706e82 2063#endif /* CONFIG_MAC80211_IBSS_DEBUG */
c2b13452
JB		 2064 spin_lock_bh(&local->bss_lock);
2065 list_for_each_entry(bss, &local->bss_list, list) {
f0706e82
JB		 2066 if (ifsta->ssid_len != bss->ssid_len ||
2067 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2068 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2069 continue;
2070#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2071 printk(KERN_DEBUG " bssid=%s found\n",
2072 print_mac(mac, bss->bssid));
f0706e82
JB		 2073#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2074 memcpy(bssid, bss->bssid, ETH_ALEN);
2075 found = 1;
2076 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2077 break;
2078 }
c2b13452 2079 spin_unlock_bh(&local->bss_lock);
f0706e82
JB		 2080
2081#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 2082 if (found)
2083 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2084 "%s\n", print_mac(mac, bssid),
2085 print_mac(mac2, ifsta->bssid));
f0706e82 2086#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 2087
2088 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 2089 int ret;
80693ceb
DD		 2090 int search_freq;
2091
2092 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2093 search_freq = bss->freq;
2094 else
2095 search_freq = local->hw.conf.channel->center_freq;
2096
f698d856 2097 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2098 ifsta->ssid, ifsta->ssid_len);
2099 if (!bss)
2100 goto dont_join;
2101
0795af57 2102 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2103 " based on configured SSID\n",
f698d856
JBG		 2104 sdata->dev->name, print_mac(mac, bssid));
2105 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2106 ieee80211_rx_bss_put(local, bss);
167ad6f7 2107 return ret;
f0706e82 2108 }
80693ceb
DD		 2109
2110dont_join:
f0706e82
JB		 2111#ifdef CONFIG_MAC80211_IBSS_DEBUG
2112 printk(KERN_DEBUG " did not try to join ibss\n");
2113#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2114
2115 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2116 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2117 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2118 mod_timer(&ifsta->timer, jiffies +
2119 IEEE80211_IBSS_MERGE_INTERVAL);
2120 } else if (time_after(jiffies, local->last_scan_completed +
2121 IEEE80211_SCAN_INTERVAL)) {
2122 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2123 "join\n", sdata->dev->name);
c2b13452 2124 return ieee80211_request_scan(sdata, ifsta->ssid,
f0706e82 2125 ifsta->ssid_len);
48c2fc59 2126 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2127 int interval = IEEE80211_SCAN_INTERVAL;
2128
2129 if (time_after(jiffies, ifsta->ibss_join_req +
2130 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2131 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2132 (!(local->oper_channel->flags &
2133 IEEE80211_CHAN_NO_IBSS)))
f698d856 2134 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2135 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2136 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2137 " %d MHz\n", sdata->dev->name,
8318d78a 2138 local->hw.conf.channel->center_freq);
f0706e82
JB		 2139 }
2140
2141 /* No IBSS found - decrease scan interval and continue
2142 * scanning. */
2143 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2144 }
2145
48c2fc59 2146 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2147 mod_timer(&ifsta->timer, jiffies + interval);
2148 return 0;
2149 }
2150
2151 return 0;
2152}
2153
2154
9c6bd790
JB		 2155static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2156 struct ieee80211_if_sta *ifsta)
f0706e82 2157{
9c6bd790 2158 struct ieee80211_local *local = sdata->local;
c2b13452 2159 struct ieee80211_bss *bss, *selected = NULL;
9c6bd790 2160 int top_rssi = 0, freq;
f0706e82 2161
c2b13452 2162 spin_lock_bh(&local->bss_lock);
9c6bd790 2163 freq = local->oper_channel->center_freq;
c2b13452 2164 list_for_each_entry(bss, &local->bss_list, list) {
9c6bd790
JB		 2165 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2166 continue;
f0706e82 2167
9c6bd790
JB		 2168 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2169 IEEE80211_STA_AUTO_BSSID_SEL |
2170 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2171 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2172 !!sdata->default_key))
2173 continue;
f0706e82 2174
9c6bd790
JB		 2175 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2176 bss->freq != freq)
2177 continue;
9d139c81 2178
9c6bd790
JB		 2179 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2180 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2181 continue;
f0706e82 2182
9c6bd790
JB		 2183 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2184 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2185 continue;
9d139c81 2186
9c6bd790
JB		 2187 if (!selected || top_rssi < bss->signal) {
2188 selected = bss;
2189 top_rssi = bss->signal;
2190 }
f0706e82 2191 }
9c6bd790
JB		 2192 if (selected)
2193 atomic_inc(&selected->users);
c2b13452 2194 spin_unlock_bh(&local->bss_lock);
9d139c81 2195
9c6bd790
JB		 2196 if (selected) {
2197 ieee80211_set_freq(sdata, selected->freq);
2198 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2199 ieee80211_sta_set_ssid(sdata, selected->ssid,
2200 selected->ssid_len);
2201 ieee80211_sta_set_bssid(sdata, selected->bssid);
2202 ieee80211_sta_def_wmm_params(sdata, selected);
f0706e82 2203
9c6bd790
JB		 2204 /* Send out direct probe if no probe resp was received or
2205 * the one we have is outdated
2206 */
2207 if (!selected->last_probe_resp ||
2208 time_after(jiffies, selected->last_probe_resp
2209 + IEEE80211_SCAN_RESULT_EXPIRE))
2210 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2211 else
2212 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2213
9c6bd790
JB		 2214 ieee80211_rx_bss_put(local, selected);
2215 ieee80211_sta_reset_auth(sdata, ifsta);
2216 return 0;
2217 } else {
2218 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2219 ifsta->assoc_scan_tries++;
2220 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
c2b13452 2221 ieee80211_start_scan(sdata, NULL, 0);
9c6bd790 2222 else
c2b13452 2223 ieee80211_start_scan(sdata, ifsta->ssid,
9c6bd790
JB		 2224 ifsta->ssid_len);
2225 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2226 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2227 } else
2228 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2229 }
2230 return -1;
2231}
2232
2233
2234static void ieee80211_sta_work(struct work_struct *work)
2235{
2236 struct ieee80211_sub_if_data *sdata =
2237 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2238 struct ieee80211_local *local = sdata->local;
2239 struct ieee80211_if_sta *ifsta;
2240 struct sk_buff *skb;
2241
2242 if (!netif_running(sdata->dev))
2243 return;
2244
c2b13452 2245 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2246 return;
2247
05c914fe
JB		 2248 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2249 sdata->vif.type != NL80211_IFTYPE_ADHOC))
9c6bd790 2250 return;
f0706e82
JB		 2251 ifsta = &sdata->u.sta;
2252
9c6bd790
JB		 2253 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2254 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2255
2256 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2257 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2258 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2259 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
c2b13452
JB		 2260 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2261 ifsta->scan_ssid_len);
9c6bd790 2262 return;
f0706e82
JB		 2263 }
2264
9c6bd790
JB		 2265 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2266 if (ieee80211_sta_config_auth(sdata, ifsta))
2267 return;
2268 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2269 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2270 return;
d6f2da5b 2271
9c6bd790
JB		 2272 switch (ifsta->state) {
2273 case IEEE80211_STA_MLME_DISABLED:
2274 break;
2275 case IEEE80211_STA_MLME_DIRECT_PROBE:
2276 ieee80211_direct_probe(sdata, ifsta);
2277 break;
2278 case IEEE80211_STA_MLME_AUTHENTICATE:
2279 ieee80211_authenticate(sdata, ifsta);
2280 break;
2281 case IEEE80211_STA_MLME_ASSOCIATE:
2282 ieee80211_associate(sdata, ifsta);
2283 break;
2284 case IEEE80211_STA_MLME_ASSOCIATED:
2285 ieee80211_associated(sdata, ifsta);
2286 break;
2287 case IEEE80211_STA_MLME_IBSS_SEARCH:
2288 ieee80211_sta_find_ibss(sdata, ifsta);
2289 break;
2290 case IEEE80211_STA_MLME_IBSS_JOINED:
2291 ieee80211_sta_merge_ibss(sdata, ifsta);
2292 break;
2293 default:
2294 WARN_ON(1);
2295 break;
2296 }
2297
2298 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2299 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2300 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2301
2302 ieee80211_set_disassoc(sdata, ifsta, false, true,
2303 WLAN_REASON_UNSPECIFIED);
2304 }
f0706e82
JB		 2305}
2306
9c6bd790
JB		 2307static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2308{
05c914fe 2309 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790
JB		 2310 queue_work(sdata->local->hw.workqueue,
2311 &sdata->u.sta.work);
2312}
f0706e82 2313
9c6bd790
JB		 2314/* interface setup */
2315void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2316{
9c6bd790 2317 struct ieee80211_if_sta *ifsta;
988c0f72 2318
9c6bd790
JB		 2319 ifsta = &sdata->u.sta;
2320 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2321 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2322 (unsigned long) sdata);
2323 skb_queue_head_init(&ifsta->skb_queue);
2324
2325 ifsta->capab = WLAN_CAPABILITY_ESS;
2326 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2327 IEEE80211_AUTH_ALG_SHARED_KEY;
2328 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2329 IEEE80211_STA_AUTO_BSSID_SEL |
2330 IEEE80211_STA_AUTO_CHANNEL_SEL;
2331 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2332 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2333}
2334
9c6bd790
JB		 2335/*
2336 * Add a new IBSS station, will also be called by the RX code when,
2337 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2338 * must be callable in atomic context.
2339 */
f698d856 2340struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 2341 struct sk_buff *skb, u8 *bssid,
87291c02 2342 u8 *addr, u64 supp_rates)
f0706e82 2343{
f698d856 2344 struct ieee80211_local *local = sdata->local;
f0706e82 2345 struct sta_info *sta;
0795af57 2346 DECLARE_MAC_BUF(mac);
87291c02 2347 int band = local->hw.conf.channel->band;
f0706e82
JB		 2348
2349 /* TODO: Could consider removing the least recently used entry and
2350 * allow new one to be added. */
2351 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2352 if (net_ratelimit()) {
2353 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
f698d856 2354 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
f0706e82
JB		 2355 }
2356 return NULL;
2357 }
2358
1e188637 2359 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2360 return NULL;
2361
f4ea83dd 2362#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 2363 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
f698d856 2364 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
f4ea83dd 2365#endif
f0706e82 2366
73651ee6
JB		 2367 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2368 if (!sta)
f0706e82
JB		 2369 return NULL;
2370
07346f81 2371 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2372
8e1535d5 2373 /* make sure mandatory rates are always added */
323ce79a 2374 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 2375 ieee80211_mandatory_rates(local, band);
f0706e82 2376
4b7679a5 2377 rate_control_rate_init(sta);
f0706e82 2378
93e5deb1 2379 if (sta_info_insert(sta))
73651ee6 2380 return NULL;
73651ee6 2381
d0709a65 2382 return sta;
f0706e82
JB		 2383}
2384
9c6bd790
JB		 2385/* configuration hooks */
2386void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2387 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2388{
2389 struct ieee80211_local *local = sdata->local;
60f8b39c 2390
05c914fe 2391 if (sdata->vif.type != NL80211_IFTYPE_STATION)
9c6bd790 2392 return;
60f8b39c 2393
9c6bd790
JB		 2394 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2395 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2396 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2397 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2398
9c6bd790
JB		 2399 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2400 ieee80211_set_disassoc(sdata, ifsta, true, true,
2401 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2402
9c6bd790
JB		 2403 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2404 queue_work(local->hw.workqueue, &ifsta->work);
2405 }
2406}
60f8b39c 2407
9c6bd790
JB		 2408int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2409{
2410 struct ieee80211_if_sta *ifsta;
2411 int res;
60f8b39c 2412
9c6bd790
JB		 2413 if (len > IEEE80211_MAX_SSID_LEN)
2414 return -EINVAL;
2415
2416 ifsta = &sdata->u.sta;
2417
2418 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2419 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2420 memcpy(ifsta->ssid, ssid, len);
2421 ifsta->ssid_len = len;
2422 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2423
2424 res = 0;
2425 /*
2426 * Hack! MLME code needs to be cleaned up to have different
2427 * entry points for configuration and internal selection change
2428 */
2429 if (netif_running(sdata->dev))
2430 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2431 if (res) {
2432 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2433 "the low-level driver\n", sdata->dev->name);
2434 return res;
60f8b39c
JB		 2435 }
2436 }
60f8b39c 2437
9c6bd790
JB		 2438 if (len)
2439 ifsta->flags |= IEEE80211_STA_SSID_SET;
2440 else
2441 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2442
05c914fe 2443 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
9c6bd790
JB		 2444 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2445 ifsta->ibss_join_req = jiffies;
2446 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2447 return ieee80211_sta_find_ibss(sdata, ifsta);
2448 }
2449
2450 return 0;
2451}
2452
2453int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2454{
2455 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2456 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2457 *len = ifsta->ssid_len;
2458 return 0;
2459}
2460
2461int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2462{
2463 struct ieee80211_if_sta *ifsta;
2464 int res;
2465
2466 ifsta = &sdata->u.sta;
2467
2468 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2469 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2470 res = 0;
2471 /*
2472 * Hack! See also ieee80211_sta_set_ssid.
60f8b39c 2473 */
9c6bd790
JB		 2474 if (netif_running(sdata->dev))
2475 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2476 if (res) {
2477 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2478 "the low-level driver\n", sdata->dev->name);
2479 return res;
2480 }
2481 }
60f8b39c 2482
9c6bd790
JB		 2483 if (is_valid_ether_addr(bssid))
2484 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2485 else
2486 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2487
2488 return 0;
2489}
2490
2491int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2492{
2493 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2494
2495 kfree(ifsta->extra_ie);
2496 if (len == 0) {
2497 ifsta->extra_ie = NULL;
2498 ifsta->extra_ie_len = 0;
60f8b39c 2499 return 0;
60f8b39c 2500 }
9c6bd790
JB		 2501 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2502 if (!ifsta->extra_ie) {
2503 ifsta->extra_ie_len = 0;
2504 return -ENOMEM;
2505 }
2506 memcpy(ifsta->extra_ie, ie, len);
2507 ifsta->extra_ie_len = len;
2508 return 0;
60f8b39c
JB		 2509}
2510
f698d856 2511int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2512{
f0706e82
JB		 2513 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2514
f4ea83dd 2515 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2516 sdata->dev->name, reason);
f0706e82 2517
05c914fe
JB		 2518 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2519 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82
JB		 2520 return -EINVAL;
2521
aa458d17 2522 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2523 return 0;
2524}
2525
f698d856 2526int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2527{
f0706e82
JB		 2528 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2529
f4ea83dd 2530 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2531 sdata->dev->name, reason);
f0706e82 2532
05c914fe 2533 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 2534 return -EINVAL;
2535
d6f2da5b 2536 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2537 return -1;
2538
aa458d17 2539 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2540 return 0;
2541}
84363e6e 2542
9c6bd790
JB		 2543/* scan finished notification */
2544void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2545{
2546 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2547 struct ieee80211_if_sta *ifsta;
2548
05c914fe 2549 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB		 2550 ifsta = &sdata->u.sta;
2551 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2552 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2553 !ieee80211_sta_active_ibss(sdata)))
2554 ieee80211_sta_find_ibss(sdata, ifsta);
2555 }
2556
2557 /* Restart STA timers */
2558 rcu_read_lock();
2559 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2560 ieee80211_restart_sta_timer(sdata);
2561 rcu_read_unlock();
2562}
Linux 6.x block layer and io_uring tree(s)