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mac80211: inform driver of basic rateset
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
17#include <linux/netdevice.h>
18#include <linux/if_arp.h>
19#include <linux/wireless.h>
20#include <linux/random.h>
21#include <linux/etherdevice.h>
d0709a65 22#include <linux/rtnetlink.h>
f0706e82 23#include <net/iw_handler.h>
f0706e82 24#include <net/mac80211.h>
472dbc45 25#include <asm/unaligned.h>
60f8b39c 26
f0706e82 27#include "ieee80211_i.h"
2c8dccc7
JB		 28#include "rate.h"
29#include "led.h"
f0706e82 30
6042a3e3 31#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 32#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
33#define IEEE80211_AUTH_MAX_TRIES 3
34#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
35#define IEEE80211_ASSOC_MAX_TRIES 3
36#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
37#define IEEE80211_PROBE_INTERVAL (60 * HZ)
38#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
39#define IEEE80211_SCAN_INTERVAL (2 * HZ)
40#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 41#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82 42
f0706e82
JB		 43#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
44#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
45
46#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
47
48
5484e237
JB		 49/* utils */
50static int ecw2cw(int ecw)
60f8b39c 51{
5484e237 52 return (1 << ecw) - 1;
60f8b39c
JB		 53}
54
c2b13452 55static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43ac2ca3
JM		 56{
57 u8 *end, *pos;
58
59 pos = bss->ies;
60 if (pos == NULL)
61 return NULL;
62 end = pos + bss->ies_len;
63
64 while (pos + 1 < end) {
65 if (pos + 2 + pos[1] > end)
66 break;
67 if (pos[0] == ie)
68 return pos;
69 pos += 2 + pos[1];
70 }
71
72 return NULL;
73}
74
c2b13452 75static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90
JB		 76 struct ieee80211_supported_band *sband,
77 u64 *rates)
78{
79 int i, j, count;
80 *rates = 0;
81 count = 0;
82 for (i = 0; i < bss->supp_rates_len; i++) {
83 int rate = (bss->supp_rates[i] & 0x7F) * 5;
84
85 for (j = 0; j < sband->n_bitrates; j++)
86 if (sband->bitrates[j].bitrate == rate) {
87 *rates |= BIT(j);
88 count++;
89 break;
90 }
91 }
92
93 return count;
94}
95
9c6bd790
JB		 96/* also used by mesh code */
97u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
98 struct ieee802_11_elems *elems,
99 enum ieee80211_band band)
60f8b39c 100{
9c6bd790
JB		 101 struct ieee80211_supported_band *sband;
102 struct ieee80211_rate *bitrates;
103 size_t num_rates;
104 u64 supp_rates;
105 int i, j;
106 sband = local->hw.wiphy->bands[band];
60f8b39c 107
9c6bd790
JB		 108 if (!sband) {
109 WARN_ON(1);
110 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
60f8b39c 111 }
60f8b39c 112
9c6bd790
JB		 113 bitrates = sband->bitrates;
114 num_rates = sband->n_bitrates;
115 supp_rates = 0;
116 for (i = 0; i < elems->supp_rates_len +
117 elems->ext_supp_rates_len; i++) {
118 u8 rate = 0;
119 int own_rate;
120 if (i < elems->supp_rates_len)
121 rate = elems->supp_rates[i];
122 else if (elems->ext_supp_rates)
123 rate = elems->ext_supp_rates
124 [i - elems->supp_rates_len];
125 own_rate = 5 * (rate & 0x7f);
126 for (j = 0; j < num_rates; j++)
127 if (bitrates[j].bitrate == own_rate)
128 supp_rates |= BIT(j);
129 }
130 return supp_rates;
60f8b39c
JB		 131}
132
9c6bd790
JB		 133/* frame sending functions */
134
135/* also used by scanning code */
0a51b27e
JB		 136void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
137 u8 *ssid, size_t ssid_len)
60f8b39c
JB		 138{
139 struct ieee80211_local *local = sdata->local;
140 struct ieee80211_supported_band *sband;
141 struct sk_buff *skb;
142 struct ieee80211_mgmt *mgmt;
143 u8 *pos, *supp_rates, *esupp_rates = NULL;
144 int i;
145
146 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
147 if (!skb) {
148 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
149 "request\n", sdata->dev->name);
150 return;
151 }
152 skb_reserve(skb, local->hw.extra_tx_headroom);
153
154 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
155 memset(mgmt, 0, 24);
156 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
157 IEEE80211_STYPE_PROBE_REQ);
158 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
159 if (dst) {
160 memcpy(mgmt->da, dst, ETH_ALEN);
161 memcpy(mgmt->bssid, dst, ETH_ALEN);
162 } else {
163 memset(mgmt->da, 0xff, ETH_ALEN);
164 memset(mgmt->bssid, 0xff, ETH_ALEN);
165 }
166 pos = skb_put(skb, 2 + ssid_len);
167 *pos++ = WLAN_EID_SSID;
168 *pos++ = ssid_len;
169 memcpy(pos, ssid, ssid_len);
170
171 supp_rates = skb_put(skb, 2);
172 supp_rates[0] = WLAN_EID_SUPP_RATES;
173 supp_rates[1] = 0;
174 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
175
176 for (i = 0; i < sband->n_bitrates; i++) {
177 struct ieee80211_rate *rate = &sband->bitrates[i];
178 if (esupp_rates) {
179 pos = skb_put(skb, 1);
180 esupp_rates[1]++;
181 } else if (supp_rates[1] == 8) {
182 esupp_rates = skb_put(skb, 3);
183 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
184 esupp_rates[1] = 1;
185 pos = &esupp_rates[2];
186 } else {
187 pos = skb_put(skb, 1);
188 supp_rates[1]++;
189 }
190 *pos = rate->bitrate / 5;
191 }
192
e50db65c 193 ieee80211_tx_skb(sdata, skb, 0);
60f8b39c
JB		 194}
195
9c6bd790
JB		 196static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
197 struct ieee80211_if_sta *ifsta,
198 int transaction, u8 *extra, size_t extra_len,
199 int encrypt)
200{
201 struct ieee80211_local *local = sdata->local;
202 struct sk_buff *skb;
203 struct ieee80211_mgmt *mgmt;
204
205 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
206 sizeof(*mgmt) + 6 + extra_len);
207 if (!skb) {
208 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
209 "frame\n", sdata->dev->name);
210 return;
211 }
212 skb_reserve(skb, local->hw.extra_tx_headroom);
213
214 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
215 memset(mgmt, 0, 24 + 6);
216 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
217 IEEE80211_STYPE_AUTH);
218 if (encrypt)
219 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
220 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
221 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
222 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
223 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
224 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
225 ifsta->auth_transaction = transaction + 1;
226 mgmt->u.auth.status_code = cpu_to_le16(0);
227 if (extra)
228 memcpy(skb_put(skb, extra_len), extra, extra_len);
229
230 ieee80211_tx_skb(sdata, skb, encrypt);
231}
232
9ac19a90
JB		 233static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
234 struct ieee80211_if_sta *ifsta)
235{
236 struct ieee80211_local *local = sdata->local;
237 struct sk_buff *skb;
238 struct ieee80211_mgmt *mgmt;
239 u8 *pos, *ies, *ht_add_ie;
240 int i, len, count, rates_len, supp_rates_len;
241 u16 capab;
c2b13452 242 struct ieee80211_bss *bss;
9ac19a90
JB		 243 int wmm = 0;
244 struct ieee80211_supported_band *sband;
245 u64 rates = 0;
246
247 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
248 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
249 ifsta->ssid_len);
250 if (!skb) {
251 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
252 "frame\n", sdata->dev->name);
253 return;
254 }
255 skb_reserve(skb, local->hw.extra_tx_headroom);
256
257 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
258
259 capab = ifsta->capab;
260
261 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
262 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
263 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
264 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
265 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
266 }
267
268 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
269 local->hw.conf.channel->center_freq,
270 ifsta->ssid, ifsta->ssid_len);
271 if (bss) {
272 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
273 capab |= WLAN_CAPABILITY_PRIVACY;
274 if (bss->wmm_used)
275 wmm = 1;
276
277 /* get all rates supported by the device and the AP as
278 * some APs don't like getting a superset of their rates
279 * in the association request (e.g. D-Link DAP 1353 in
280 * b-only mode) */
281 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
282
283 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
284 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
285 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
286
287 ieee80211_rx_bss_put(local, bss);
288 } else {
289 rates = ~0;
290 rates_len = sband->n_bitrates;
291 }
292
293 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
294 memset(mgmt, 0, 24);
295 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
296 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
297 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
298
299 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
300 skb_put(skb, 10);
301 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
302 IEEE80211_STYPE_REASSOC_REQ);
303 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
304 mgmt->u.reassoc_req.listen_interval =
305 cpu_to_le16(local->hw.conf.listen_interval);
306 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
307 ETH_ALEN);
308 } else {
309 skb_put(skb, 4);
310 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
311 IEEE80211_STYPE_ASSOC_REQ);
312 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
313 mgmt->u.reassoc_req.listen_interval =
314 cpu_to_le16(local->hw.conf.listen_interval);
315 }
316
317 /* SSID */
318 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
319 *pos++ = WLAN_EID_SSID;
320 *pos++ = ifsta->ssid_len;
321 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
322
323 /* add all rates which were marked to be used above */
324 supp_rates_len = rates_len;
325 if (supp_rates_len > 8)
326 supp_rates_len = 8;
327
328 len = sband->n_bitrates;
329 pos = skb_put(skb, supp_rates_len + 2);
330 *pos++ = WLAN_EID_SUPP_RATES;
331 *pos++ = supp_rates_len;
332
333 count = 0;
334 for (i = 0; i < sband->n_bitrates; i++) {
335 if (BIT(i) & rates) {
336 int rate = sband->bitrates[i].bitrate;
337 *pos++ = (u8) (rate / 5);
338 if (++count == 8)
339 break;
340 }
341 }
342
343 if (rates_len > count) {
344 pos = skb_put(skb, rates_len - count + 2);
345 *pos++ = WLAN_EID_EXT_SUPP_RATES;
346 *pos++ = rates_len - count;
347
348 for (i++; i < sband->n_bitrates; i++) {
349 if (BIT(i) & rates) {
350 int rate = sband->bitrates[i].bitrate;
351 *pos++ = (u8) (rate / 5);
352 }
353 }
354 }
355
356 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
357 /* 1. power capabilities */
358 pos = skb_put(skb, 4);
359 *pos++ = WLAN_EID_PWR_CAPABILITY;
360 *pos++ = 2;
361 *pos++ = 0; /* min tx power */
362 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
363
364 /* 2. supported channels */
365 /* TODO: get this in reg domain format */
366 pos = skb_put(skb, 2 * sband->n_channels + 2);
367 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
368 *pos++ = 2 * sband->n_channels;
369 for (i = 0; i < sband->n_channels; i++) {
370 *pos++ = ieee80211_frequency_to_channel(
371 sband->channels[i].center_freq);
372 *pos++ = 1; /* one channel in the subband*/
373 }
374 }
375
376 if (ifsta->extra_ie) {
377 pos = skb_put(skb, ifsta->extra_ie_len);
378 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
379 }
380
381 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
382 pos = skb_put(skb, 9);
383 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
384 *pos++ = 7; /* len */
385 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
386 *pos++ = 0x50;
387 *pos++ = 0xf2;
388 *pos++ = 2; /* WME */
389 *pos++ = 0; /* WME info */
390 *pos++ = 1; /* WME ver */
391 *pos++ = 0;
392 }
393
394 /* wmm support is a must to HT */
395 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
396 sband->ht_info.ht_supported &&
397 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
398 struct ieee80211_ht_addt_info *ht_add_info =
399 (struct ieee80211_ht_addt_info *)ht_add_ie;
400 u16 cap = sband->ht_info.cap;
401 __le16 tmp;
402 u32 flags = local->hw.conf.channel->flags;
403
404 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
405 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
406 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
407 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
408 cap &= ~IEEE80211_HT_CAP_SGI_40;
409 }
410 break;
411 case IEEE80211_HT_IE_CHA_SEC_BELOW:
412 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
413 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
414 cap &= ~IEEE80211_HT_CAP_SGI_40;
415 }
416 break;
417 }
418
419 tmp = cpu_to_le16(cap);
420 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
421 *pos++ = WLAN_EID_HT_CAPABILITY;
422 *pos++ = sizeof(struct ieee80211_ht_cap);
423 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
424 memcpy(pos, &tmp, sizeof(u16));
425 pos += sizeof(u16);
426 /* TODO: needs a define here for << 2 */
427 *pos++ = sband->ht_info.ampdu_factor |
428 (sband->ht_info.ampdu_density << 2);
429 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
430 }
431
432 kfree(ifsta->assocreq_ies);
433 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
434 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
435 if (ifsta->assocreq_ies)
436 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
437
e50db65c 438 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 439}
440
441
ef422bc0
JB		 442static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
443 u16 stype, u16 reason)
9ac19a90
JB		 444{
445 struct ieee80211_local *local = sdata->local;
ef422bc0 446 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
9ac19a90
JB		 447 struct sk_buff *skb;
448 struct ieee80211_mgmt *mgmt;
449
450 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
451 if (!skb) {
ef422bc0
JB		 452 printk(KERN_DEBUG "%s: failed to allocate buffer for "
453 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 454 return;
455 }
456 skb_reserve(skb, local->hw.extra_tx_headroom);
457
458 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
459 memset(mgmt, 0, 24);
460 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
461 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
462 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
ef422bc0 463 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 464 skb_put(skb, 2);
ef422bc0 465 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 466 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
467
e50db65c 468 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 469}
470
60f8b39c 471/* MLME */
f698d856 472static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
c2b13452 473 struct ieee80211_bss *bss)
e2839d8f 474{
e2839d8f
VK		 475 struct ieee80211_local *local = sdata->local;
476 int i, have_higher_than_11mbit = 0;
477
e2839d8f
VK		 478 /* cf. IEEE 802.11 9.2.12 */
479 for (i = 0; i < bss->supp_rates_len; i++)
480 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
481 have_higher_than_11mbit = 1;
482
483 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
484 have_higher_than_11mbit)
485 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
486 else
487 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
488
3d35f7c6 489 ieee80211_set_wmm_default(sdata);
e2839d8f
VK		 490}
491
f698d856 492static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 493 struct ieee80211_if_sta *ifsta,
494 u8 *wmm_param, size_t wmm_param_len)
495{
f0706e82
JB		 496 struct ieee80211_tx_queue_params params;
497 size_t left;
498 int count;
499 u8 *pos;
500
3434fbd3
JB		 501 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
502 return;
503
504 if (!wmm_param)
505 return;
506
f0706e82
JB		 507 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
508 return;
509 count = wmm_param[6] & 0x0f;
510 if (count == ifsta->wmm_last_param_set)
511 return;
512 ifsta->wmm_last_param_set = count;
513
514 pos = wmm_param + 8;
515 left = wmm_param_len - 8;
516
517 memset(&params, 0, sizeof(params));
518
519 if (!local->ops->conf_tx)
520 return;
521
522 local->wmm_acm = 0;
523 for (; left >= 4; left -= 4, pos += 4) {
524 int aci = (pos[0] >> 5) & 0x03;
525 int acm = (pos[0] >> 4) & 0x01;
526 int queue;
527
528 switch (aci) {
529 case 1:
e100bb64 530 queue = 3;
988c0f72 531 if (acm)
f0706e82 532 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 533 break;
534 case 2:
e100bb64 535 queue = 1;
988c0f72 536 if (acm)
f0706e82 537 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 538 break;
539 case 3:
e100bb64 540 queue = 0;
988c0f72 541 if (acm)
f0706e82 542 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 543 break;
544 case 0:
545 default:
e100bb64 546 queue = 2;
988c0f72 547 if (acm)
f0706e82 548 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 549 break;
550 }
551
552 params.aifs = pos[0] & 0x0f;
553 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
554 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 555 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 556#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 557 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 558 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 559 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 560 params.cw_max, params.txop);
561#endif
f0706e82
JB		 562 /* TODO: handle ACM (block TX, fallback to next lowest allowed
563 * AC for now) */
564 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
565 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 566 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 567 }
568 }
569}
570
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{
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
c2b13452 677 struct ieee80211_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 712 sdata->bss_conf.assoc = 1;
96dd22ac
JB		 713 /*
714 * For now just always ask the driver to update the basic rateset
715 * when we have associated, we aren't checking whether it actually
716 * changed or not.
717 */
718 changed |= BSS_CHANGED_BASIC_RATES;
9ac19a90 719 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82 720
9ac19a90
JB		 721 netif_tx_start_all_queues(sdata->dev);
722 netif_carrier_on(sdata->dev);
f0706e82 723
9ac19a90 724 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 725}
726
9ac19a90
JB		 727static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
728 struct ieee80211_if_sta *ifsta)
f0706e82 729{
9ac19a90 730 DECLARE_MAC_BUF(mac);
f0706e82 731
9ac19a90
JB		 732 ifsta->direct_probe_tries++;
733 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
734 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
735 sdata->dev->name, print_mac(mac, ifsta->bssid));
736 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 737 return;
738 }
f0706e82 739
9ac19a90
JB		 740 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
741 sdata->dev->name, print_mac(mac, ifsta->bssid),
742 ifsta->direct_probe_tries);
f0706e82 743
9ac19a90 744 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 745
9ac19a90
JB		 746 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
747
748 /* Direct probe is sent to broadcast address as some APs
749 * will not answer to direct packet in unassociated state.
750 */
751 ieee80211_send_probe_req(sdata, NULL,
752 ifsta->ssid, ifsta->ssid_len);
753
754 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 755}
f0706e82 756
9ac19a90
JB		 757
758static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
759 struct ieee80211_if_sta *ifsta)
f0706e82 760{
9ac19a90 761 DECLARE_MAC_BUF(mac);
f0706e82 762
9ac19a90
JB		 763 ifsta->auth_tries++;
764 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
765 printk(KERN_DEBUG "%s: authentication with AP %s"
766 " timed out\n",
767 sdata->dev->name, print_mac(mac, ifsta->bssid));
768 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 769 return;
770 }
f0706e82 771
9ac19a90
JB		 772 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
773 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
774 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 775
9ac19a90
JB		 776 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
777
778 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 779}
780
aa458d17
TW		 781static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
782 struct ieee80211_if_sta *ifsta, bool deauth,
783 bool self_disconnected, u16 reason)
784{
785 struct ieee80211_local *local = sdata->local;
786 struct sta_info *sta;
f5e5bf25 787 u32 changed = BSS_CHANGED_ASSOC;
aa458d17
TW		 788
789 rcu_read_lock();
790
791 sta = sta_info_get(local, ifsta->bssid);
792 if (!sta) {
793 rcu_read_unlock();
794 return;
795 }
796
797 if (deauth) {
798 ifsta->direct_probe_tries = 0;
799 ifsta->auth_tries = 0;
800 }
801 ifsta->assoc_scan_tries = 0;
802 ifsta->assoc_tries = 0;
803
24e64622 804 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 805 netif_carrier_off(sdata->dev);
806
807 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
808
809 if (self_disconnected) {
810 if (deauth)
ef422bc0
JB		 811 ieee80211_send_deauth_disassoc(sdata,
812 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 813 else
ef422bc0
JB		 814 ieee80211_send_deauth_disassoc(sdata,
815 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 816 }
817
f5e5bf25
TW		 818 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
819 changed |= ieee80211_reset_erp_info(sdata);
820
821 if (sdata->bss_conf.assoc_ht)
822 changed |= BSS_CHANGED_HT;
823
824 sdata->bss_conf.assoc_ht = 0;
825 sdata->bss_conf.ht_conf = NULL;
826 sdata->bss_conf.ht_bss_conf = NULL;
827
828 ieee80211_led_assoc(local, 0);
829 sdata->bss_conf.assoc = 0;
830
831 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17
TW		 832
833 if (self_disconnected)
834 ifsta->state = IEEE80211_STA_MLME_DISABLED;
835
836 sta_info_unlink(&sta);
837
838 rcu_read_unlock();
839
840 sta_info_destroy(sta);
841}
f0706e82 842
9ac19a90
JB		 843static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
844{
845 if (!sdata || !sdata->default_key ||
846 sdata->default_key->conf.alg != ALG_WEP)
847 return 0;
848 return 1;
849}
850
f698d856 851static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 852 struct ieee80211_if_sta *ifsta)
853{
f698d856 854 struct ieee80211_local *local = sdata->local;
c2b13452 855 struct ieee80211_bss *bss;
5b98b1f7
JB		 856 int bss_privacy;
857 int wep_privacy;
858 int privacy_invoked;
f0706e82 859
5b98b1f7 860 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 861 return 0;
862
f698d856 863 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 864 local->hw.conf.channel->center_freq,
cffdd30d 865 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 866 if (!bss)
867 return 0;
868
5b98b1f7 869 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 870 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 871 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 872
3e122be0 873 ieee80211_rx_bss_put(local, bss);
f0706e82 874
5b98b1f7
JB		 875 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
876 return 0;
877
878 return 1;
f0706e82
JB		 879}
880
f698d856 881static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 882 struct ieee80211_if_sta *ifsta)
883{
0795af57
JP		 884 DECLARE_MAC_BUF(mac);
885
f0706e82
JB		 886 ifsta->assoc_tries++;
887 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 888 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 889 " timed out\n",
f698d856 890 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 891 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 892 return;
893 }
894
48c2fc59 895 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0795af57 896 printk(KERN_DEBUG "%s: associate with AP %s\n",
f698d856
JBG		 897 sdata->dev->name, print_mac(mac, ifsta->bssid));
898 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 899 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 900 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 901 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 902 return;
903 }
904
f698d856 905 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 906
907 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
908}
909
910
f698d856 911static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 912 struct ieee80211_if_sta *ifsta)
913{
f698d856 914 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 915 struct sta_info *sta;
916 int disassoc;
0795af57 917 DECLARE_MAC_BUF(mac);
f0706e82
JB		 918
919 /* TODO: start monitoring current AP signal quality and number of
920 * missed beacons. Scan other channels every now and then and search
921 * for better APs. */
922 /* TODO: remove expired BSSes */
923
48c2fc59 924 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 925
d0709a65
JB		 926 rcu_read_lock();
927
f0706e82
JB		 928 sta = sta_info_get(local, ifsta->bssid);
929 if (!sta) {
0795af57 930 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
f698d856 931 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 932 disassoc = 1;
933 } else {
934 disassoc = 0;
935 if (time_after(jiffies,
936 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 937 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 938 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 939 "current AP %s - assume out of "
f0706e82 940 "range\n",
f698d856 941 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 942 disassoc = 1;
d6f2da5b 943 } else
f698d856 944 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 945 local->scan_ssid,
946 local->scan_ssid_len);
d6f2da5b 947 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 948 } else {
d6f2da5b 949 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 950 if (time_after(jiffies, ifsta->last_probe +
951 IEEE80211_PROBE_INTERVAL)) {
952 ifsta->last_probe = jiffies;
f698d856 953 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 954 ifsta->ssid,
955 ifsta->ssid_len);
956 }
957 }
f0706e82 958 }
d0709a65
JB		 959
960 rcu_read_unlock();
961
60f8b39c
JB		 962 if (disassoc)
963 ieee80211_set_disassoc(sdata, ifsta, true, true,
964 WLAN_REASON_PREV_AUTH_NOT_VALID);
965 else
966 mod_timer(&ifsta->timer, jiffies +
967 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 968}
969
970
f698d856 971static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 972 struct ieee80211_if_sta *ifsta)
973{
f698d856 974 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 975 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 976 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 977}
978
979
f698d856 980static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 981 struct ieee80211_if_sta *ifsta,
982 struct ieee80211_mgmt *mgmt,
983 size_t len)
984{
985 u8 *pos;
986 struct ieee802_11_elems elems;
987
f0706e82 988 pos = mgmt->u.auth.variable;
67a4cce4 989 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 990 if (!elems.challenge)
f0706e82 991 return;
f698d856 992 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 993 elems.challenge_len + 2, 1);
994}
995
f698d856 996static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 997 struct ieee80211_if_sta *ifsta,
998 struct ieee80211_mgmt *mgmt,
999 size_t len)
1000{
f0706e82 1001 u16 auth_alg, auth_transaction, status_code;
0795af57 1002 DECLARE_MAC_BUF(mac);
f0706e82 1003
48c2fc59 1004 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
f4ea83dd 1005 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82 1006 return;
f0706e82 1007
f4ea83dd 1008 if (len < 24 + 6)
f0706e82 1009 return;
f0706e82 1010
51fb61e7 1011 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1012 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1013 return;
f0706e82 1014
51fb61e7 1015 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1016 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1017 return;
f0706e82
JB		 1018
1019 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1020 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1021 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1022
51fb61e7 1023 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
135a2110
JB		 1024 /*
1025 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1026 * networks and most implementations do not seem to use it.
1027 * However, try to reply to authentication attempts if someone
1028 * has actually implemented this.
135a2110 1029 */
f4ea83dd 1030 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1031 return;
f698d856 1032 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1033 }
1034
1035 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1036 auth_transaction != ifsta->auth_transaction)
f0706e82 1037 return;
f0706e82
JB		 1038
1039 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1040 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1041 u8 algs[3];
1042 const int num_algs = ARRAY_SIZE(algs);
1043 int i, pos;
1044 algs[0] = algs[1] = algs[2] = 0xff;
1045 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1046 algs[0] = WLAN_AUTH_OPEN;
1047 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1048 algs[1] = WLAN_AUTH_SHARED_KEY;
1049 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1050 algs[2] = WLAN_AUTH_LEAP;
1051 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1052 pos = 0;
1053 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1054 pos = 1;
1055 else
1056 pos = 2;
1057 for (i = 0; i < num_algs; i++) {
1058 pos++;
1059 if (pos >= num_algs)
1060 pos = 0;
1061 if (algs[pos] == ifsta->auth_alg ||
1062 algs[pos] == 0xff)
1063 continue;
1064 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1065 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1066 continue;
1067 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1068 break;
1069 }
1070 }
1071 return;
1072 }
1073
1074 switch (ifsta->auth_alg) {
1075 case WLAN_AUTH_OPEN:
1076 case WLAN_AUTH_LEAP:
f698d856 1077 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1078 break;
1079 case WLAN_AUTH_SHARED_KEY:
1080 if (ifsta->auth_transaction == 4)
f698d856 1081 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1082 else
f698d856 1083 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1084 break;
1085 }
1086}
1087
1088
f698d856 1089static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1090 struct ieee80211_if_sta *ifsta,
1091 struct ieee80211_mgmt *mgmt,
1092 size_t len)
1093{
1094 u16 reason_code;
0795af57 1095 DECLARE_MAC_BUF(mac);
f0706e82 1096
f4ea83dd 1097 if (len < 24 + 2)
f0706e82 1098 return;
f0706e82 1099
f4ea83dd 1100 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1101 return;
f0706e82
JB		 1102
1103 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1104
988c0f72 1105 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 1106 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 1107
48c2fc59
TW		 1108 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1109 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1110 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1111 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1112 mod_timer(&ifsta->timer, jiffies +
1113 IEEE80211_RETRY_AUTH_INTERVAL);
1114 }
1115
aa458d17 1116 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1117 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1118}
1119
1120
f698d856 1121static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1122 struct ieee80211_if_sta *ifsta,
1123 struct ieee80211_mgmt *mgmt,
1124 size_t len)
1125{
1126 u16 reason_code;
0795af57 1127 DECLARE_MAC_BUF(mac);
f0706e82 1128
f4ea83dd 1129 if (len < 24 + 2)
f0706e82 1130 return;
f0706e82 1131
f4ea83dd 1132 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1133 return;
f0706e82
JB		 1134
1135 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1136
d6f2da5b 1137 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 1138 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 1139
48c2fc59
TW		 1140 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1141 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1142 mod_timer(&ifsta->timer, jiffies +
1143 IEEE80211_RETRY_AUTH_INTERVAL);
1144 }
1145
aa458d17 1146 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
f0706e82
JB		 1147}
1148
1149
471b3efd 1150static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1151 struct ieee80211_if_sta *ifsta,
1152 struct ieee80211_mgmt *mgmt,
1153 size_t len,
1154 int reassoc)
1155{
471b3efd 1156 struct ieee80211_local *local = sdata->local;
8318d78a 1157 struct ieee80211_supported_band *sband;
f0706e82 1158 struct sta_info *sta;
8318d78a 1159 u64 rates, basic_rates;
f0706e82
JB		 1160 u16 capab_info, status_code, aid;
1161 struct ieee802_11_elems elems;
471b3efd 1162 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1163 u8 *pos;
1164 int i, j;
0795af57 1165 DECLARE_MAC_BUF(mac);
8318d78a 1166 bool have_higher_than_11mbit = false;
f0706e82
JB		 1167
1168 /* AssocResp and ReassocResp have identical structure, so process both
1169 * of them in this function. */
1170
48c2fc59 1171 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1172 return;
f0706e82 1173
f4ea83dd 1174 if (len < 24 + 6)
f0706e82 1175 return;
f0706e82 1176
f4ea83dd 1177 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1178 return;
f0706e82
JB		 1179
1180 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1181 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1182 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1183
0795af57 1184 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1185 "status=%d aid=%d)\n",
f698d856 1186 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1187 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1188
1189 if (status_code != WLAN_STATUS_SUCCESS) {
1190 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1191 sdata->dev->name, status_code);
8a69aa93
DD		 1192 /* if this was a reassociation, ensure we try a "full"
1193 * association next time. This works around some broken APs
1194 * which do not correctly reject reassociation requests. */
d6f2da5b 1195 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1196 return;
1197 }
1198
1dd84aa2
JB		 1199 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1200 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1201 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1202 aid &= ~(BIT(15) | BIT(14));
1203
f0706e82 1204 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1205 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1206
1207 if (!elems.supp_rates) {
1208 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1209 sdata->dev->name);
f0706e82
JB		 1210 return;
1211 }
1212
f698d856 1213 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1214 ifsta->aid = aid;
1215 ifsta->ap_capab = capab_info;
1216
1217 kfree(ifsta->assocresp_ies);
1218 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1219 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1220 if (ifsta->assocresp_ies)
1221 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1222
d0709a65
JB		 1223 rcu_read_lock();
1224
f0706e82
JB		 1225 /* Add STA entry for the AP */
1226 sta = sta_info_get(local, ifsta->bssid);
1227 if (!sta) {
c2b13452 1228 struct ieee80211_bss *bss;
73651ee6 1229 int err;
d0709a65 1230
73651ee6
JB		 1231 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1232 if (!sta) {
1233 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1234 " the AP\n", sdata->dev->name);
d0709a65 1235 rcu_read_unlock();
f0706e82
JB		 1236 return;
1237 }
60f8b39c
JB		 1238 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1239 local->hw.conf.channel->center_freq,
1240 ifsta->ssid, ifsta->ssid_len);
1241 if (bss) {
1242 sta->last_signal = bss->signal;
1243 sta->last_qual = bss->qual;
1244 sta->last_noise = bss->noise;
1245 ieee80211_rx_bss_put(local, bss);
1246 }
f709fc69 1247
60f8b39c
JB		 1248 err = sta_info_insert(sta);
1249 if (err) {
1250 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1251 " the AP (error %d)\n", sdata->dev->name, err);
1252 rcu_read_unlock();
1253 return;
f709fc69 1254 }
60f8b39c
JB		 1255 /* update new sta with its last rx activity */
1256 sta->last_rx = jiffies;
f709fc69 1257 }
f709fc69 1258
60f8b39c
JB		 1259 /*
1260 * FIXME: Do we really need to update the sta_info's information here?
1261 * We already know about the AP (we found it in our list) so it
1262 * should already be filled with the right info, no?
1263 * As is stands, all this is racy because typically we assume
1264 * the information that is filled in here (except flags) doesn't
1265 * change while a STA structure is alive. As such, it should move
1266 * to between the sta_info_alloc() and sta_info_insert() above.
1267 */
f709fc69 1268
60f8b39c
JB		 1269 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1270 WLAN_STA_AUTHORIZED);
05e5e883 1271
60f8b39c
JB		 1272 rates = 0;
1273 basic_rates = 0;
1274 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1275
60f8b39c
JB		 1276 for (i = 0; i < elems.supp_rates_len; i++) {
1277 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f709fc69 1278
60f8b39c
JB		 1279 if (rate > 110)
1280 have_higher_than_11mbit = true;
1281
1282 for (j = 0; j < sband->n_bitrates; j++) {
1283 if (sband->bitrates[j].bitrate == rate)
1284 rates |= BIT(j);
1285 if (elems.supp_rates[i] & 0x80)
1286 basic_rates |= BIT(j);
f709fc69 1287 }
f709fc69
LCC		 1288 }
1289
60f8b39c
JB		 1290 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1291 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82 1292
60f8b39c
JB		 1293 if (rate > 110)
1294 have_higher_than_11mbit = true;
f0706e82 1295
60f8b39c
JB		 1296 for (j = 0; j < sband->n_bitrates; j++) {
1297 if (sband->bitrates[j].bitrate == rate)
1298 rates |= BIT(j);
1299 if (elems.ext_supp_rates[i] & 0x80)
1300 basic_rates |= BIT(j);
1301 }
1ebebea8 1302 }
f0706e82 1303
60f8b39c 1304 sta->supp_rates[local->hw.conf.channel->band] = rates;
96dd22ac 1305 sdata->bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1306
1307 /* cf. IEEE 802.11 9.2.12 */
1308 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1309 have_higher_than_11mbit)
1310 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1311 else
1312 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1313
60f8b39c
JB		 1314 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1315 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1316 struct ieee80211_ht_bss_info bss_info;
1317 ieee80211_ht_cap_ie_to_ht_info(
1318 (struct ieee80211_ht_cap *)
1319 elems.ht_cap_elem, &sta->ht_info);
1320 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1321 (struct ieee80211_ht_addt_info *)
1322 elems.ht_info_elem, &bss_info);
1323 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
1324 }
f0706e82 1325
60f8b39c 1326 rate_control_rate_init(sta, local);
f0706e82 1327
60f8b39c
JB		 1328 if (elems.wmm_param) {
1329 set_sta_flags(sta, WLAN_STA_WME);
1330 rcu_read_unlock();
1331 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1332 elems.wmm_param_len);
1333 } else
1334 rcu_read_unlock();
f0706e82 1335
60f8b39c
JB		 1336 /* set AID and assoc capability,
1337 * ieee80211_set_associated() will tell the driver */
1338 bss_conf->aid = aid;
1339 bss_conf->assoc_capability = capab_info;
1340 ieee80211_set_associated(sdata, ifsta);
f0706e82 1341
60f8b39c 1342 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1343}
1344
1345
f698d856 1346static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a 1347 struct ieee80211_if_sta *ifsta,
c2b13452 1348 struct ieee80211_bss *bss)
a607268a 1349{
f698d856 1350 struct ieee80211_local *local = sdata->local;
a607268a
BR		 1351 int res, rates, i, j;
1352 struct sk_buff *skb;
1353 struct ieee80211_mgmt *mgmt;
a607268a 1354 u8 *pos;
a607268a 1355 struct ieee80211_supported_band *sband;
507b06d0 1356 union iwreq_data wrqu;
a607268a
BR		 1357
1358 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1359
1360 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1361 sta_info_flush_delayed(sdata);
a607268a
BR		 1362
1363 if (local->ops->reset_tsf) {
1364 /* Reset own TSF to allow time synchronization work. */
1365 local->ops->reset_tsf(local_to_hw(local));
1366 }
1367 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1368 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1369 if (res)
1370 return res;
1371
1372 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1373
a607268a
BR		 1374 sdata->drop_unencrypted = bss->capability &
1375 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1376
f698d856 1377 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1378
be038b37
AK		 1379 if (res)
1380 return res;
a607268a 1381
9d139c81 1382 /* Build IBSS probe response */
a607268a 1383 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 1384 if (skb) {
a607268a
BR		 1385 skb_reserve(skb, local->hw.extra_tx_headroom);
1386
1387 mgmt = (struct ieee80211_mgmt *)
1388 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1389 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 1390 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1391 IEEE80211_STYPE_PROBE_RESP);
a607268a 1392 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 1393 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 1394 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1395 mgmt->u.beacon.beacon_int =
1396 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 1397 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 1398 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1399
1400 pos = skb_put(skb, 2 + ifsta->ssid_len);
1401 *pos++ = WLAN_EID_SSID;
1402 *pos++ = ifsta->ssid_len;
1403 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1404
1405 rates = bss->supp_rates_len;
1406 if (rates > 8)
1407 rates = 8;
1408 pos = skb_put(skb, 2 + rates);
1409 *pos++ = WLAN_EID_SUPP_RATES;
1410 *pos++ = rates;
1411 memcpy(pos, bss->supp_rates, rates);
1412
1413 if (bss->band == IEEE80211_BAND_2GHZ) {
1414 pos = skb_put(skb, 2 + 1);
1415 *pos++ = WLAN_EID_DS_PARAMS;
1416 *pos++ = 1;
1417 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1418 }
1419
1420 pos = skb_put(skb, 2 + 2);
1421 *pos++ = WLAN_EID_IBSS_PARAMS;
1422 *pos++ = 2;
1423 /* FIX: set ATIM window based on scan results */
1424 *pos++ = 0;
1425 *pos++ = 0;
1426
1427 if (bss->supp_rates_len > 8) {
1428 rates = bss->supp_rates_len - 8;
1429 pos = skb_put(skb, 2 + rates);
1430 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1431 *pos++ = rates;
1432 memcpy(pos, &bss->supp_rates[8], rates);
1433 }
1434
9d139c81 1435 ifsta->probe_resp = skb;
e039fa4a 1436
9d139c81
JB		 1437 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1438 }
a607268a 1439
9d139c81
JB		 1440 rates = 0;
1441 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1442 for (i = 0; i < bss->supp_rates_len; i++) {
1443 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1444 for (j = 0; j < sband->n_bitrates; j++)
1445 if (sband->bitrates[j].bitrate == bitrate)
1446 rates |= BIT(j);
a607268a 1447 }
9d139c81
JB		 1448 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1449
b079ada7 1450 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1451
48c2fc59 1452 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1453 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1454
507b06d0
DW		 1455 memset(&wrqu, 0, sizeof(wrqu));
1456 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1457 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1458
1459 return res;
1460}
1461
98c8fccf
JB		 1462static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1463 struct ieee80211_mgmt *mgmt,
1464 size_t len,
1465 struct ieee80211_rx_status *rx_status,
1466 struct ieee802_11_elems *elems,
1467 bool beacon)
1468{
1469 struct ieee80211_local *local = sdata->local;
1470 int freq;
c2b13452 1471 struct ieee80211_bss *bss;
98c8fccf
JB		 1472 struct sta_info *sta;
1473 struct ieee80211_channel *channel;
1474 u64 beacon_timestamp, rx_timestamp;
1475 u64 supp_rates = 0;
1476 enum ieee80211_band band = rx_status->band;
1477 DECLARE_MAC_BUF(mac);
1478 DECLARE_MAC_BUF(mac2);
1479
1480 if (elems->ds_params && elems->ds_params_len == 1)
1481 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1482 else
1483 freq = rx_status->freq;
1484
1485 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1486
1487 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1488 return;
1489
98c8fccf
JB		 1490 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
1491 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1492 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1493
1494 rcu_read_lock();
1495
1496 sta = sta_info_get(local, mgmt->sa);
1497 if (sta) {
1498 u64 prev_rates;
1499
1500 prev_rates = sta->supp_rates[band];
1501 /* make sure mandatory rates are always added */
1502 sta->supp_rates[band] = supp_rates |
96dd22ac 1503 ieee80211_mandatory_rates(local, band);
98c8fccf
JB		 1504
1505#ifdef CONFIG_MAC80211_IBSS_DEBUG
1506 if (sta->supp_rates[band] != prev_rates)
1507 printk(KERN_DEBUG "%s: updated supp_rates set "
1508 "for %s based on beacon info (0x%llx | "
1509 "0x%llx -> 0x%llx)\n",
1510 sdata->dev->name, print_mac(mac, sta->addr),
1511 (unsigned long long) prev_rates,
1512 (unsigned long long) supp_rates,
1513 (unsigned long long) sta->supp_rates[band]);
1514#endif
1515 } else {
1516 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1517 mgmt->sa, supp_rates);
1518 }
1519
1520 rcu_read_unlock();
1521 }
1522
1523 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1524 freq, beacon);
1525 if (!bss)
1526 return;
1527
1528 /* was just updated in ieee80211_bss_info_update */
1529 beacon_timestamp = bss->timestamp;
1530
30b89b0f
JB		 1531 /*
1532 * In STA mode, the remaining parameters should not be overridden
1533 * by beacons because they're not necessarily accurate there.
1534 */
1535 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
9859b81e 1536 bss->last_probe_resp && beacon) {
3e122be0 1537 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1538 return;
1539 }
1540
9d9bf77d
BR		 1541 /* check if we need to merge IBSS */
1542 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
fba4a1e6 1543 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1544 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1545 elems->ssid_len == sdata->u.sta.ssid_len &&
1546 memcmp(elems->ssid, sdata->u.sta.ssid,
1547 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1548 if (rx_status->flag & RX_FLAG_TSFT) {
1549 /* in order for correct IBSS merging we need mactime
1550 *
1551 * since mactime is defined as the time the first data
1552 * symbol of the frame hits the PHY, and the timestamp
1553 * of the beacon is defined as "the time that the data
1554 * symbol containing the first bit of the timestamp is
1555 * transmitted to the PHY plus the transmitting STA’s
1556 * delays through its local PHY from the MAC-PHY
1557 * interface to its interface with the WM"
1558 * (802.11 11.1.2) - equals the time this bit arrives at
1559 * the receiver - we have to take into account the
1560 * offset between the two.
1561 * e.g: at 1 MBit that means mactime is 192 usec earlier
1562 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1563 */
8e1535d5 1564 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 1565 bitrates[rx_status->rate_idx].bitrate;
1566 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1567 } else if (local && local->ops && local->ops->get_tsf)
1568 /* second best option: get current TSF */
1569 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1570 else
1571 /* can't merge without knowing the TSF */
1572 rx_timestamp = -1LLU;
1573#ifdef CONFIG_MAC80211_IBSS_DEBUG
1574 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1575 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1576 print_mac(mac, mgmt->sa),
1577 print_mac(mac2, mgmt->bssid),
1578 (unsigned long long)rx_timestamp,
1579 (unsigned long long)beacon_timestamp,
1580 (unsigned long long)(rx_timestamp - beacon_timestamp),
1581 jiffies);
1582#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1583 if (beacon_timestamp > rx_timestamp) {
576fdeae 1584#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 1585 printk(KERN_DEBUG "%s: beacon TSF higher than "
1586 "local TSF - IBSS merge with BSSID %s\n",
f698d856 1587 sdata->dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 1588#endif
f698d856
JBG		 1589 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1590 ieee80211_ibss_add_sta(sdata, NULL,
87291c02 1591 mgmt->bssid, mgmt->sa,
8e1535d5 1592 supp_rates);
9d9bf77d
BR		 1593 }
1594 }
1595
3e122be0 1596 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1597}
1598
1599
f698d856 1600static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1601 struct ieee80211_mgmt *mgmt,
1602 size_t len,
1603 struct ieee80211_rx_status *rx_status)
1604{
ae6a44e3
EK		 1605 size_t baselen;
1606 struct ieee802_11_elems elems;
9859b81e 1607 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1608
8e7cdbb6
TW		 1609 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1610 return; /* ignore ProbeResp to foreign address */
1611
ae6a44e3
EK		 1612 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1613 if (baselen > len)
1614 return;
1615
1616 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1617 &elems);
1618
98c8fccf 1619 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1620
1621 /* direct probe may be part of the association flow */
1622 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1623 &ifsta->request)) {
1624 printk(KERN_DEBUG "%s direct probe responded\n",
1625 sdata->dev->name);
1626 ieee80211_authenticate(sdata, ifsta);
1627 }
f0706e82
JB		 1628}
1629
1630
f698d856 1631static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1632 struct ieee80211_mgmt *mgmt,
1633 size_t len,
1634 struct ieee80211_rx_status *rx_status)
1635{
f0706e82 1636 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1637 size_t baselen;
1638 struct ieee802_11_elems elems;
f698d856 1639 struct ieee80211_local *local = sdata->local;
d3c990fb 1640 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 1641 u32 changed = 0;
f0706e82 1642
ae6a44e3
EK		 1643 /* Process beacon from the current BSS */
1644 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1645 if (baselen > len)
1646 return;
1647
1648 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1649
98c8fccf 1650 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1651
51fb61e7 1652 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 1653 return;
1654 ifsta = &sdata->u.sta;
1655
d6f2da5b 1656 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1657 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1658 return;
1659
fe3fa827
JB		 1660 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1661 elems.wmm_param_len);
1662
5628221c 1663 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 1664 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 1665 else {
1666 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
1667 changed |= ieee80211_handle_protect_preamb(sdata, false,
1668 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
1669 }
f0706e82 1670
d3c990fb 1671 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 1672 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 1673 struct ieee80211_ht_bss_info bss_info;
1674
1675 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1676 (struct ieee80211_ht_addt_info *)
1677 elems.ht_info_elem, &bss_info);
38668c05
TW		 1678 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
1679 &bss_info);
d3c990fb
RR		 1680 }
1681
471b3efd 1682 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1683}
1684
1685
f698d856 1686static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1687 struct ieee80211_if_sta *ifsta,
1688 struct ieee80211_mgmt *mgmt,
1689 size_t len,
1690 struct ieee80211_rx_status *rx_status)
1691{
f698d856 1692 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1693 int tx_last_beacon;
1694 struct sk_buff *skb;
1695 struct ieee80211_mgmt *resp;
1696 u8 *pos, *end;
0795af57
JP		 1697 DECLARE_MAC_BUF(mac);
1698#ifdef CONFIG_MAC80211_IBSS_DEBUG
1699 DECLARE_MAC_BUF(mac2);
1700 DECLARE_MAC_BUF(mac3);
1701#endif
f0706e82 1702
51fb61e7 1703 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
48c2fc59 1704 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 1705 len < 24 + 2 || !ifsta->probe_resp)
1706 return;
1707
1708 if (local->ops->tx_last_beacon)
1709 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1710 else
1711 tx_last_beacon = 1;
1712
1713#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1714 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1715 "%s (tx_last_beacon=%d)\n",
f698d856 1716 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
0795af57 1717 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 1718#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1719
1720 if (!tx_last_beacon)
1721 return;
1722
1723 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1724 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1725 return;
1726
1727 end = ((u8 *) mgmt) + len;
1728 pos = mgmt->u.probe_req.variable;
1729 if (pos[0] != WLAN_EID_SSID ||
1730 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 1731#ifdef CONFIG_MAC80211_IBSS_DEBUG
1732 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1733 "from %s\n",
f698d856 1734 sdata->dev->name, print_mac(mac, mgmt->sa));
f4ea83dd 1735#endif
f0706e82
JB		 1736 return;
1737 }
1738 if (pos[1] != 0 &&
1739 (pos[1] != ifsta->ssid_len ||
1740 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1741 /* Ignore ProbeReq for foreign SSID */
1742 return;
1743 }
1744
1745 /* Reply with ProbeResp */
0ec0b7ac 1746 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1747 if (!skb)
1748 return;
1749
1750 resp = (struct ieee80211_mgmt *) skb->data;
1751 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1752#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 1753 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
f698d856 1754 sdata->dev->name, print_mac(mac, resp->da));
f0706e82 1755#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 1756 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 1757}
1758
f698d856 1759void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 1760 struct ieee80211_rx_status *rx_status)
1761{
f698d856 1762 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1763 struct ieee80211_if_sta *ifsta;
1764 struct ieee80211_mgmt *mgmt;
1765 u16 fc;
1766
1767 if (skb->len < 24)
1768 goto fail;
1769
f0706e82
JB		 1770 ifsta = &sdata->u.sta;
1771
1772 mgmt = (struct ieee80211_mgmt *) skb->data;
1773 fc = le16_to_cpu(mgmt->frame_control);
1774
1775 switch (fc & IEEE80211_FCTL_STYPE) {
1776 case IEEE80211_STYPE_PROBE_REQ:
1777 case IEEE80211_STYPE_PROBE_RESP:
1778 case IEEE80211_STYPE_BEACON:
1779 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1780 case IEEE80211_STYPE_AUTH:
1781 case IEEE80211_STYPE_ASSOC_RESP:
1782 case IEEE80211_STYPE_REASSOC_RESP:
1783 case IEEE80211_STYPE_DEAUTH:
1784 case IEEE80211_STYPE_DISASSOC:
1785 skb_queue_tail(&ifsta->skb_queue, skb);
1786 queue_work(local->hw.workqueue, &ifsta->work);
1787 return;
f0706e82
JB		 1788 }
1789
1790 fail:
1791 kfree_skb(skb);
1792}
1793
f698d856 1794static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1795 struct sk_buff *skb)
1796{
1797 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 1798 struct ieee80211_if_sta *ifsta;
1799 struct ieee80211_mgmt *mgmt;
1800 u16 fc;
1801
f0706e82
JB		 1802 ifsta = &sdata->u.sta;
1803
1804 rx_status = (struct ieee80211_rx_status *) skb->cb;
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:
f698d856 1810 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 1811 rx_status);
1812 break;
1813 case IEEE80211_STYPE_PROBE_RESP:
f698d856 1814 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1815 break;
1816 case IEEE80211_STYPE_BEACON:
f698d856 1817 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 1818 break;
1819 case IEEE80211_STYPE_AUTH:
f698d856 1820 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1821 break;
1822 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 1823 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 1824 break;
1825 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 1826 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 1827 break;
1828 case IEEE80211_STYPE_DEAUTH:
f698d856 1829 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1830 break;
1831 case IEEE80211_STYPE_DISASSOC:
f698d856 1832 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 1833 break;
1834 }
1835
1836 kfree_skb(skb);
1837}
1838
1839
f698d856 1840static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 1841{
f698d856 1842 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1843 int active = 0;
1844 struct sta_info *sta;
1845
d0709a65
JB		 1846 rcu_read_lock();
1847
1848 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1849 if (sta->sdata == sdata &&
f0706e82
JB		 1850 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1851 jiffies)) {
1852 active++;
1853 break;
1854 }
1855 }
d0709a65
JB		 1856
1857 rcu_read_unlock();
f0706e82
JB		 1858
1859 return active;
1860}
1861
1862
f698d856 1863static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1864 struct ieee80211_if_sta *ifsta)
1865{
1866 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1867
f698d856
JBG		 1868 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
1869 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 1870 return;
1871
1872 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 1873 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
c2b13452 1874 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1875}
1876
1877
9c6bd790 1878static void ieee80211_sta_timer(unsigned long data)
f0706e82 1879{
60f8b39c
JB		 1880 struct ieee80211_sub_if_data *sdata =
1881 (struct ieee80211_sub_if_data *) data;
1882 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1883 struct ieee80211_local *local = sdata->local;
f0706e82 1884
60f8b39c
JB		 1885 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1886 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 1887}
1888
f698d856 1889static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1890 struct ieee80211_if_sta *ifsta)
1891{
f698d856 1892 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1893
1894 if (local->ops->reset_tsf) {
1895 /* Reset own TSF to allow time synchronization work. */
1896 local->ops->reset_tsf(local_to_hw(local));
1897 }
1898
1899 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
1900
1901
1902 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1903 ifsta->auth_alg = WLAN_AUTH_OPEN;
1904 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1905 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
1906 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1907 ifsta->auth_alg = WLAN_AUTH_LEAP;
1908 else
1909 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 1910 ifsta->auth_transaction = -1;
d6f2da5b 1911 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 1912 ifsta->assoc_scan_tries = 0;
9859b81e 1913 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 1914 ifsta->auth_tries = 0;
1915 ifsta->assoc_tries = 0;
24e64622 1916 netif_tx_stop_all_queues(sdata->dev);
f698d856 1917 netif_carrier_off(sdata->dev);
f0706e82
JB		 1918}
1919
1920
f0706e82
JB		 1921static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
1922 const char *ssid, int ssid_len)
1923{
1924 int tmp, hidden_ssid;
1925
48225709
MW		 1926 if (ssid_len == ifsta->ssid_len &&
1927 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 1928 return 1;
1929
d6f2da5b 1930 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 1931 return 0;
1932
1933 hidden_ssid = 1;
1934 tmp = ssid_len;
1935 while (tmp--) {
1936 if (ssid[tmp] != '\0') {
1937 hidden_ssid = 0;
1938 break;
1939 }
1940 }
1941
1942 if (hidden_ssid && ifsta->ssid_len == ssid_len)
1943 return 1;
1944
1945 if (ssid_len == 1 && ssid[0] == ' ')
1946 return 1;
1947
1948 return 0;
1949}
1950
f698d856 1951static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1952 struct ieee80211_if_sta *ifsta)
1953{
f698d856 1954 struct ieee80211_local *local = sdata->local;
c2b13452 1955 struct ieee80211_bss *bss;
8318d78a 1956 struct ieee80211_supported_band *sband;
f0706e82
JB		 1957 u8 bssid[ETH_ALEN], *pos;
1958 int i;
167ad6f7 1959 int ret;
0795af57 1960 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1961
1962#if 0
1963 /* Easier testing, use fixed BSSID. */
1964 memset(bssid, 0xfe, ETH_ALEN);
1965#else
1966 /* Generate random, not broadcast, locally administered BSSID. Mix in
1967 * own MAC address to make sure that devices that do not have proper
1968 * random number generator get different BSSID. */
1969 get_random_bytes(bssid, ETH_ALEN);
1970 for (i = 0; i < ETH_ALEN; i++)
f698d856 1971 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 1972 bssid[0] &= ~0x01;
1973 bssid[0] |= 0x02;
1974#endif
1975
0795af57 1976 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
f698d856 1977 sdata->dev->name, print_mac(mac, bssid));
f0706e82 1978
98c8fccf 1979 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 1980 local->hw.conf.channel->center_freq,
cffdd30d 1981 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 1982 if (!bss)
1983 return -ENOMEM;
1984
8318d78a
JB		 1985 bss->band = local->hw.conf.channel->band;
1986 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 1987
1988 if (local->hw.conf.beacon_int == 0)
dc0ae30c 1989 local->hw.conf.beacon_int = 100;
f0706e82 1990 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 1991 bss->last_update = jiffies;
1992 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 1993
1994 if (sdata->default_key)
f0706e82 1995 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 1996 else
f0706e82 1997 sdata->drop_unencrypted = 0;
988c0f72 1998
8318d78a 1999 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2000 pos = bss->supp_rates;
8318d78a
JB		 2001 for (i = 0; i < sband->n_bitrates; i++) {
2002 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2003 *pos++ = (u8) (rate / 5);
2004 }
2005
f698d856 2006 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2007 ieee80211_rx_bss_put(local, bss);
167ad6f7 2008 return ret;
f0706e82
JB		 2009}
2010
2011
f698d856 2012static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2013 struct ieee80211_if_sta *ifsta)
2014{
f698d856 2015 struct ieee80211_local *local = sdata->local;
c2b13452 2016 struct ieee80211_bss *bss;
f0706e82
JB		 2017 int found = 0;
2018 u8 bssid[ETH_ALEN];
2019 int active_ibss;
0795af57
JP		 2020 DECLARE_MAC_BUF(mac);
2021 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2022
2023 if (ifsta->ssid_len == 0)
2024 return -EINVAL;
2025
f698d856 2026 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2027#ifdef CONFIG_MAC80211_IBSS_DEBUG
2028 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2029 sdata->dev->name, active_ibss);
f0706e82 2030#endif /* CONFIG_MAC80211_IBSS_DEBUG */
c2b13452
JB		 2031 spin_lock_bh(&local->bss_lock);
2032 list_for_each_entry(bss, &local->bss_list, list) {
f0706e82
JB		 2033 if (ifsta->ssid_len != bss->ssid_len ||
2034 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2035 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2036 continue;
2037#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2038 printk(KERN_DEBUG " bssid=%s found\n",
2039 print_mac(mac, bss->bssid));
f0706e82
JB		 2040#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2041 memcpy(bssid, bss->bssid, ETH_ALEN);
2042 found = 1;
2043 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2044 break;
2045 }
c2b13452 2046 spin_unlock_bh(&local->bss_lock);
f0706e82
JB		 2047
2048#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 2049 if (found)
2050 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2051 "%s\n", print_mac(mac, bssid),
2052 print_mac(mac2, ifsta->bssid));
f0706e82 2053#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 2054
2055 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 2056 int ret;
80693ceb
DD		 2057 int search_freq;
2058
2059 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2060 search_freq = bss->freq;
2061 else
2062 search_freq = local->hw.conf.channel->center_freq;
2063
f698d856 2064 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2065 ifsta->ssid, ifsta->ssid_len);
2066 if (!bss)
2067 goto dont_join;
2068
0795af57 2069 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2070 " based on configured SSID\n",
f698d856
JBG		 2071 sdata->dev->name, print_mac(mac, bssid));
2072 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2073 ieee80211_rx_bss_put(local, bss);
167ad6f7 2074 return ret;
f0706e82 2075 }
80693ceb
DD		 2076
2077dont_join:
f0706e82
JB		 2078#ifdef CONFIG_MAC80211_IBSS_DEBUG
2079 printk(KERN_DEBUG " did not try to join ibss\n");
2080#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2081
2082 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2083 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2084 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2085 mod_timer(&ifsta->timer, jiffies +
2086 IEEE80211_IBSS_MERGE_INTERVAL);
2087 } else if (time_after(jiffies, local->last_scan_completed +
2088 IEEE80211_SCAN_INTERVAL)) {
2089 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2090 "join\n", sdata->dev->name);
c2b13452 2091 return ieee80211_request_scan(sdata, ifsta->ssid,
f0706e82 2092 ifsta->ssid_len);
48c2fc59 2093 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2094 int interval = IEEE80211_SCAN_INTERVAL;
2095
2096 if (time_after(jiffies, ifsta->ibss_join_req +
2097 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2098 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2099 (!(local->oper_channel->flags &
2100 IEEE80211_CHAN_NO_IBSS)))
f698d856 2101 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2102 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2103 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2104 " %d MHz\n", sdata->dev->name,
8318d78a 2105 local->hw.conf.channel->center_freq);
f0706e82
JB		 2106 }
2107
2108 /* No IBSS found - decrease scan interval and continue
2109 * scanning. */
2110 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2111 }
2112
48c2fc59 2113 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2114 mod_timer(&ifsta->timer, jiffies + interval);
2115 return 0;
2116 }
2117
2118 return 0;
2119}
2120
2121
9c6bd790
JB		 2122static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2123 struct ieee80211_if_sta *ifsta)
f0706e82 2124{
9c6bd790 2125 struct ieee80211_local *local = sdata->local;
c2b13452 2126 struct ieee80211_bss *bss, *selected = NULL;
9c6bd790 2127 int top_rssi = 0, freq;
f0706e82 2128
c2b13452 2129 spin_lock_bh(&local->bss_lock);
9c6bd790 2130 freq = local->oper_channel->center_freq;
c2b13452 2131 list_for_each_entry(bss, &local->bss_list, list) {
9c6bd790
JB		 2132 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2133 continue;
f0706e82 2134
9c6bd790
JB		 2135 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2136 IEEE80211_STA_AUTO_BSSID_SEL |
2137 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2138 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2139 !!sdata->default_key))
2140 continue;
f0706e82 2141
9c6bd790
JB		 2142 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2143 bss->freq != freq)
2144 continue;
9d139c81 2145
9c6bd790
JB		 2146 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2147 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2148 continue;
f0706e82 2149
9c6bd790
JB		 2150 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2151 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2152 continue;
9d139c81 2153
9c6bd790
JB		 2154 if (!selected || top_rssi < bss->signal) {
2155 selected = bss;
2156 top_rssi = bss->signal;
2157 }
f0706e82 2158 }
9c6bd790
JB		 2159 if (selected)
2160 atomic_inc(&selected->users);
c2b13452 2161 spin_unlock_bh(&local->bss_lock);
9d139c81 2162
9c6bd790
JB		 2163 if (selected) {
2164 ieee80211_set_freq(sdata, selected->freq);
2165 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2166 ieee80211_sta_set_ssid(sdata, selected->ssid,
2167 selected->ssid_len);
2168 ieee80211_sta_set_bssid(sdata, selected->bssid);
2169 ieee80211_sta_def_wmm_params(sdata, selected);
f0706e82 2170
9c6bd790
JB		 2171 /* Send out direct probe if no probe resp was received or
2172 * the one we have is outdated
2173 */
2174 if (!selected->last_probe_resp ||
2175 time_after(jiffies, selected->last_probe_resp
2176 + IEEE80211_SCAN_RESULT_EXPIRE))
2177 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2178 else
2179 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2180
9c6bd790
JB		 2181 ieee80211_rx_bss_put(local, selected);
2182 ieee80211_sta_reset_auth(sdata, ifsta);
2183 return 0;
2184 } else {
2185 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2186 ifsta->assoc_scan_tries++;
2187 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
c2b13452 2188 ieee80211_start_scan(sdata, NULL, 0);
9c6bd790 2189 else
c2b13452 2190 ieee80211_start_scan(sdata, ifsta->ssid,
9c6bd790
JB		 2191 ifsta->ssid_len);
2192 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2193 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2194 } else
2195 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2196 }
2197 return -1;
2198}
2199
2200
2201static void ieee80211_sta_work(struct work_struct *work)
2202{
2203 struct ieee80211_sub_if_data *sdata =
2204 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2205 struct ieee80211_local *local = sdata->local;
2206 struct ieee80211_if_sta *ifsta;
2207 struct sk_buff *skb;
2208
2209 if (!netif_running(sdata->dev))
2210 return;
2211
c2b13452 2212 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2213 return;
2214
2215 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2216 sdata->vif.type != IEEE80211_IF_TYPE_IBSS))
2217 return;
f0706e82
JB		 2218 ifsta = &sdata->u.sta;
2219
9c6bd790
JB		 2220 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2221 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2222
2223 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2224 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2225 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2226 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
c2b13452
JB		 2227 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2228 ifsta->scan_ssid_len);
9c6bd790 2229 return;
f0706e82
JB		 2230 }
2231
9c6bd790
JB		 2232 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2233 if (ieee80211_sta_config_auth(sdata, ifsta))
2234 return;
2235 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2236 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2237 return;
d6f2da5b 2238
9c6bd790
JB		 2239 switch (ifsta->state) {
2240 case IEEE80211_STA_MLME_DISABLED:
2241 break;
2242 case IEEE80211_STA_MLME_DIRECT_PROBE:
2243 ieee80211_direct_probe(sdata, ifsta);
2244 break;
2245 case IEEE80211_STA_MLME_AUTHENTICATE:
2246 ieee80211_authenticate(sdata, ifsta);
2247 break;
2248 case IEEE80211_STA_MLME_ASSOCIATE:
2249 ieee80211_associate(sdata, ifsta);
2250 break;
2251 case IEEE80211_STA_MLME_ASSOCIATED:
2252 ieee80211_associated(sdata, ifsta);
2253 break;
2254 case IEEE80211_STA_MLME_IBSS_SEARCH:
2255 ieee80211_sta_find_ibss(sdata, ifsta);
2256 break;
2257 case IEEE80211_STA_MLME_IBSS_JOINED:
2258 ieee80211_sta_merge_ibss(sdata, ifsta);
2259 break;
2260 default:
2261 WARN_ON(1);
2262 break;
2263 }
2264
2265 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2266 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2267 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2268
2269 ieee80211_set_disassoc(sdata, ifsta, false, true,
2270 WLAN_REASON_UNSPECIFIED);
2271 }
f0706e82
JB		 2272}
2273
9c6bd790
JB		 2274static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2275{
2276 if (sdata->vif.type == IEEE80211_IF_TYPE_STA)
2277 queue_work(sdata->local->hw.workqueue,
2278 &sdata->u.sta.work);
2279}
f0706e82 2280
9c6bd790
JB		 2281/* interface setup */
2282void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2283{
9c6bd790 2284 struct ieee80211_if_sta *ifsta;
988c0f72 2285
9c6bd790
JB		 2286 ifsta = &sdata->u.sta;
2287 INIT_WORK(&ifsta->work, ieee80211_sta_work);
2288 setup_timer(&ifsta->timer, ieee80211_sta_timer,
2289 (unsigned long) sdata);
2290 skb_queue_head_init(&ifsta->skb_queue);
2291
2292 ifsta->capab = WLAN_CAPABILITY_ESS;
2293 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2294 IEEE80211_AUTH_ALG_SHARED_KEY;
2295 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2296 IEEE80211_STA_AUTO_BSSID_SEL |
2297 IEEE80211_STA_AUTO_CHANNEL_SEL;
2298 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2299 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2300}
2301
9c6bd790
JB		 2302/*
2303 * Add a new IBSS station, will also be called by the RX code when,
2304 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2305 * must be callable in atomic context.
2306 */
f698d856 2307struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 2308 struct sk_buff *skb, u8 *bssid,
87291c02 2309 u8 *addr, u64 supp_rates)
f0706e82 2310{
f698d856 2311 struct ieee80211_local *local = sdata->local;
f0706e82 2312 struct sta_info *sta;
0795af57 2313 DECLARE_MAC_BUF(mac);
87291c02 2314 int band = local->hw.conf.channel->band;
f0706e82
JB		 2315
2316 /* TODO: Could consider removing the least recently used entry and
2317 * allow new one to be added. */
2318 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2319 if (net_ratelimit()) {
2320 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
f698d856 2321 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
f0706e82
JB		 2322 }
2323 return NULL;
2324 }
2325
1e188637 2326 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2327 return NULL;
2328
f4ea83dd 2329#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 2330 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
f698d856 2331 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
f4ea83dd 2332#endif
f0706e82 2333
73651ee6
JB		 2334 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2335 if (!sta)
f0706e82
JB		 2336 return NULL;
2337
07346f81 2338 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2339
8e1535d5
EG		 2340 /* make sure mandatory rates are always added */
2341 sta->supp_rates[band] = supp_rates |
96dd22ac 2342 ieee80211_mandatory_rates(local, band);
f0706e82
JB		 2343
2344 rate_control_rate_init(sta, local);
2345
93e5deb1 2346 if (sta_info_insert(sta))
73651ee6 2347 return NULL;
73651ee6 2348
d0709a65 2349 return sta;
f0706e82
JB		 2350}
2351
9c6bd790
JB		 2352/* configuration hooks */
2353void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2354 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2355{
2356 struct ieee80211_local *local = sdata->local;
60f8b39c 2357
9c6bd790
JB		 2358 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2359 return;
60f8b39c 2360
9c6bd790
JB		 2361 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2362 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2363 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2364 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2365
9c6bd790
JB		 2366 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2367 ieee80211_set_disassoc(sdata, ifsta, true, true,
2368 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2369
9c6bd790
JB		 2370 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2371 queue_work(local->hw.workqueue, &ifsta->work);
2372 }
2373}
60f8b39c 2374
9c6bd790
JB		 2375int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2376{
2377 struct ieee80211_if_sta *ifsta;
2378 int res;
60f8b39c 2379
9c6bd790
JB		 2380 if (len > IEEE80211_MAX_SSID_LEN)
2381 return -EINVAL;
2382
2383 ifsta = &sdata->u.sta;
2384
2385 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2386 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2387 memcpy(ifsta->ssid, ssid, len);
2388 ifsta->ssid_len = len;
2389 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2390
2391 res = 0;
2392 /*
2393 * Hack! MLME code needs to be cleaned up to have different
2394 * entry points for configuration and internal selection change
2395 */
2396 if (netif_running(sdata->dev))
2397 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2398 if (res) {
2399 printk(KERN_DEBUG "%s: Failed to config new SSID to "
2400 "the low-level driver\n", sdata->dev->name);
2401 return res;
60f8b39c
JB		 2402 }
2403 }
60f8b39c 2404
9c6bd790
JB		 2405 if (len)
2406 ifsta->flags |= IEEE80211_STA_SSID_SET;
2407 else
2408 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2409
9c6bd790
JB		 2410 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
2411 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2412 ifsta->ibss_join_req = jiffies;
2413 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2414 return ieee80211_sta_find_ibss(sdata, ifsta);
2415 }
2416
2417 return 0;
2418}
2419
2420int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2421{
2422 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2423 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2424 *len = ifsta->ssid_len;
2425 return 0;
2426}
2427
2428int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2429{
2430 struct ieee80211_if_sta *ifsta;
2431 int res;
2432
2433 ifsta = &sdata->u.sta;
2434
2435 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2436 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2437 res = 0;
2438 /*
2439 * Hack! See also ieee80211_sta_set_ssid.
60f8b39c 2440 */
9c6bd790
JB		 2441 if (netif_running(sdata->dev))
2442 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2443 if (res) {
2444 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2445 "the low-level driver\n", sdata->dev->name);
2446 return res;
2447 }
2448 }
60f8b39c 2449
9c6bd790
JB		 2450 if (is_valid_ether_addr(bssid))
2451 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2452 else
2453 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2454
2455 return 0;
2456}
2457
2458int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2459{
2460 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2461
2462 kfree(ifsta->extra_ie);
2463 if (len == 0) {
2464 ifsta->extra_ie = NULL;
2465 ifsta->extra_ie_len = 0;
60f8b39c 2466 return 0;
60f8b39c 2467 }
9c6bd790
JB		 2468 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2469 if (!ifsta->extra_ie) {
2470 ifsta->extra_ie_len = 0;
2471 return -ENOMEM;
2472 }
2473 memcpy(ifsta->extra_ie, ie, len);
2474 ifsta->extra_ie_len = len;
2475 return 0;
60f8b39c
JB		 2476}
2477
f698d856 2478int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2479{
f0706e82
JB		 2480 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2481
f4ea83dd 2482 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2483 sdata->dev->name, reason);
f0706e82 2484
51fb61e7
JB		 2485 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2486 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 2487 return -EINVAL;
2488
aa458d17 2489 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2490 return 0;
2491}
2492
f698d856 2493int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2494{
f0706e82
JB		 2495 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2496
f4ea83dd 2497 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2498 sdata->dev->name, reason);
f0706e82 2499
51fb61e7 2500 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2501 return -EINVAL;
2502
d6f2da5b 2503 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2504 return -1;
2505
aa458d17 2506 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2507 return 0;
2508}
84363e6e 2509
9c6bd790
JB		 2510/* scan finished notification */
2511void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2512{
2513 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2514 struct ieee80211_if_sta *ifsta;
2515
2516 if (sdata && sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
2517 ifsta = &sdata->u.sta;
2518 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2519 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2520 !ieee80211_sta_active_ibss(sdata)))
2521 ieee80211_sta_find_ibss(sdata, ifsta);
2522 }
2523
2524 /* Restart STA timers */
2525 rcu_read_lock();
2526 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2527 ieee80211_restart_sta_timer(sdata);
2528 rcu_read_unlock();
2529}
2530
2531/* driver notification call */
84363e6e
MA		 2532void ieee80211_notify_mac(struct ieee80211_hw *hw,
2533 enum ieee80211_notification_types notif_type)
2534{
2535 struct ieee80211_local *local = hw_to_local(hw);
2536 struct ieee80211_sub_if_data *sdata;
2537
2538 switch (notif_type) {
2539 case IEEE80211_NOTIFY_RE_ASSOC:
2540 rcu_read_lock();
2541 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3e122be0
JB		 2542 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2543 continue;
84363e6e 2544
f698d856 2545 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
84363e6e
MA		 2546 }
2547 rcu_read_unlock();
2548 break;
2549 }
2550}
2551EXPORT_SYMBOL(ieee80211_notify_mac);
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