mlme.c 71.1 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
/*
 * BSS client mode implementation
 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
 * Copyright 2004, Instant802 Networks, Inc.
 * Copyright 2005, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

14
#include <linux/delay.h>
15
16
17
18
19
20
21
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/wireless.h>
#include <linux/random.h>
#include <linux/etherdevice.h>
22
#include <linux/rtnetlink.h>
23
24
#include <net/iw_handler.h>
#include <net/mac80211.h>
25
#include <asm/unaligned.h>
Johannes Berg's avatar
Johannes Berg committed
26

27
#include "ieee80211_i.h"
Johannes Berg's avatar
Johannes Berg committed
28
29
#include "rate.h"
#include "led.h"
30

31
#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
32
33
34
35
36
37
38
39
40
#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
#define IEEE80211_AUTH_MAX_TRIES 3
#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
#define IEEE80211_ASSOC_MAX_TRIES 3
#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
#define IEEE80211_PROBE_INTERVAL (60 * HZ)
#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
#define IEEE80211_SCAN_INTERVAL (2 * HZ)
#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
41
#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
42
43
44
45
46
47
48

#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)

#define IEEE80211_IBSS_MAX_STA_ENTRIES 128


49
50
/* utils */
static int ecw2cw(int ecw)
Johannes Berg's avatar
Johannes Berg committed
51
{
52
	return (1 << ecw) - 1;
Johannes Berg's avatar
Johannes Berg committed
53
54
55
}

static u8 *ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
{
	u8 *end, *pos;

	pos = bss->ies;
	if (pos == NULL)
		return NULL;
	end = pos + bss->ies_len;

	while (pos + 1 < end) {
		if (pos + 2 + pos[1] > end)
			break;
		if (pos[0] == ie)
			return pos;
		pos += 2 + pos[1];
	}

	return NULL;
}

75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
				      struct ieee80211_supported_band *sband,
				      u64 *rates)
{
	int i, j, count;
	*rates = 0;
	count = 0;
	for (i = 0; i < bss->supp_rates_len; i++) {
		int rate = (bss->supp_rates[i] & 0x7F) * 5;

		for (j = 0; j < sband->n_bitrates; j++)
			if (sband->bitrates[j].bitrate == rate) {
				*rates |= BIT(j);
				count++;
				break;
			}
	}

	return count;
}

96
97
98
99
/* also used by mesh code */
u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
			    struct ieee802_11_elems *elems,
			    enum ieee80211_band band)
Johannes Berg's avatar
Johannes Berg committed
100
{
101
102
103
104
105
106
	struct ieee80211_supported_band *sband;
	struct ieee80211_rate *bitrates;
	size_t num_rates;
	u64 supp_rates;
	int i, j;
	sband = local->hw.wiphy->bands[band];
Johannes Berg's avatar
Johannes Berg committed
107

108
109
110
	if (!sband) {
		WARN_ON(1);
		sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Berg's avatar
Johannes Berg committed
111
112
	}

113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
	bitrates = sband->bitrates;
	num_rates = sband->n_bitrates;
	supp_rates = 0;
	for (i = 0; i < elems->supp_rates_len +
		     elems->ext_supp_rates_len; i++) {
		u8 rate = 0;
		int own_rate;
		if (i < elems->supp_rates_len)
			rate = elems->supp_rates[i];
		else if (elems->ext_supp_rates)
			rate = elems->ext_supp_rates
				[i - elems->supp_rates_len];
		own_rate = 5 * (rate & 0x7f);
		for (j = 0; j < num_rates; j++)
			if (bitrates[j].bitrate == own_rate)
				supp_rates |= BIT(j);
	}
	return supp_rates;
Johannes Berg's avatar
Johannes Berg committed
131
132
}

133
134
135
/* frame sending functions */

/* also used by scanning code */
136
137
void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
			      u8 *ssid, size_t ssid_len)
Johannes Berg's avatar
Johannes Berg committed
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_supported_band *sband;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
	u8 *pos, *supp_rates, *esupp_rates = NULL;
	int i;

	skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
	if (!skb) {
		printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
		       "request\n", sdata->dev->name);
		return;
	}
	skb_reserve(skb, local->hw.extra_tx_headroom);

	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
	memset(mgmt, 0, 24);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_PROBE_REQ);
	memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
	if (dst) {
		memcpy(mgmt->da, dst, ETH_ALEN);
		memcpy(mgmt->bssid, dst, ETH_ALEN);
	} else {
		memset(mgmt->da, 0xff, ETH_ALEN);
		memset(mgmt->bssid, 0xff, ETH_ALEN);
	}
	pos = skb_put(skb, 2 + ssid_len);
	*pos++ = WLAN_EID_SSID;
	*pos++ = ssid_len;
	memcpy(pos, ssid, ssid_len);

	supp_rates = skb_put(skb, 2);
	supp_rates[0] = WLAN_EID_SUPP_RATES;
	supp_rates[1] = 0;
	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];

	for (i = 0; i < sband->n_bitrates; i++) {
		struct ieee80211_rate *rate = &sband->bitrates[i];
		if (esupp_rates) {
			pos = skb_put(skb, 1);
			esupp_rates[1]++;
		} else if (supp_rates[1] == 8) {
			esupp_rates = skb_put(skb, 3);
			esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
			esupp_rates[1] = 1;
			pos = &esupp_rates[2];
		} else {
			pos = skb_put(skb, 1);
			supp_rates[1]++;
		}
		*pos = rate->bitrate / 5;
	}

193
	ieee80211_tx_skb(sdata, skb, 0);
Johannes Berg's avatar
Johannes Berg committed
194
195
}

196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
				struct ieee80211_if_sta *ifsta,
				int transaction, u8 *extra, size_t extra_len,
				int encrypt)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;

	skb = dev_alloc_skb(local->hw.extra_tx_headroom +
			    sizeof(*mgmt) + 6 + extra_len);
	if (!skb) {
		printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
		       "frame\n", sdata->dev->name);
		return;
	}
	skb_reserve(skb, local->hw.extra_tx_headroom);

	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
	memset(mgmt, 0, 24 + 6);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_AUTH);
	if (encrypt)
		mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
	memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
	memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
	memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
	mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
	mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
	ifsta->auth_transaction = transaction + 1;
	mgmt->u.auth.status_code = cpu_to_le16(0);
	if (extra)
		memcpy(skb_put(skb, extra_len), extra, extra_len);

	ieee80211_tx_skb(sdata, skb, encrypt);
}

233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
				 struct ieee80211_if_sta *ifsta)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
	u8 *pos, *ies, *ht_add_ie;
	int i, len, count, rates_len, supp_rates_len;
	u16 capab;
	struct ieee80211_sta_bss *bss;
	int wmm = 0;
	struct ieee80211_supported_band *sband;
	u64 rates = 0;

	skb = dev_alloc_skb(local->hw.extra_tx_headroom +
			    sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
			    ifsta->ssid_len);
	if (!skb) {
		printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
		       "frame\n", sdata->dev->name);
		return;
	}
	skb_reserve(skb, local->hw.extra_tx_headroom);

	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];

	capab = ifsta->capab;

	if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
		if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
			capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
		if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
			capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
	}

	bss = ieee80211_rx_bss_get(local, ifsta->bssid,
				   local->hw.conf.channel->center_freq,
				   ifsta->ssid, ifsta->ssid_len);
	if (bss) {
		if (bss->capability & WLAN_CAPABILITY_PRIVACY)
			capab |= WLAN_CAPABILITY_PRIVACY;
		if (bss->wmm_used)
			wmm = 1;

		/* get all rates supported by the device and the AP as
		 * some APs don't like getting a superset of their rates
		 * in the association request (e.g. D-Link DAP 1353 in
		 * b-only mode) */
		rates_len = ieee80211_compatible_rates(bss, sband, &rates);

		if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
		    (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
			capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;

		ieee80211_rx_bss_put(local, bss);
	} else {
		rates = ~0;
		rates_len = sband->n_bitrates;
	}

	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
	memset(mgmt, 0, 24);
	memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
	memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
	memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);

	if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
		skb_put(skb, 10);
		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
						  IEEE80211_STYPE_REASSOC_REQ);
		mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
		mgmt->u.reassoc_req.listen_interval =
				cpu_to_le16(local->hw.conf.listen_interval);
		memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
		       ETH_ALEN);
	} else {
		skb_put(skb, 4);
		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
						  IEEE80211_STYPE_ASSOC_REQ);
		mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
		mgmt->u.reassoc_req.listen_interval =
				cpu_to_le16(local->hw.conf.listen_interval);
	}

	/* SSID */
	ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
	*pos++ = WLAN_EID_SSID;
	*pos++ = ifsta->ssid_len;
	memcpy(pos, ifsta->ssid, ifsta->ssid_len);

	/* add all rates which were marked to be used above */
	supp_rates_len = rates_len;
	if (supp_rates_len > 8)
		supp_rates_len = 8;

	len = sband->n_bitrates;
	pos = skb_put(skb, supp_rates_len + 2);
	*pos++ = WLAN_EID_SUPP_RATES;
	*pos++ = supp_rates_len;

	count = 0;
	for (i = 0; i < sband->n_bitrates; i++) {
		if (BIT(i) & rates) {
			int rate = sband->bitrates[i].bitrate;
			*pos++ = (u8) (rate / 5);
			if (++count == 8)
				break;
		}
	}

	if (rates_len > count) {
		pos = skb_put(skb, rates_len - count + 2);
		*pos++ = WLAN_EID_EXT_SUPP_RATES;
		*pos++ = rates_len - count;

		for (i++; i < sband->n_bitrates; i++) {
			if (BIT(i) & rates) {
				int rate = sband->bitrates[i].bitrate;
				*pos++ = (u8) (rate / 5);
			}
		}
	}

	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
		/* 1. power capabilities */
		pos = skb_put(skb, 4);
		*pos++ = WLAN_EID_PWR_CAPABILITY;
		*pos++ = 2;
		*pos++ = 0; /* min tx power */
		*pos++ = local->hw.conf.channel->max_power; /* max tx power */

		/* 2. supported channels */
		/* TODO: get this in reg domain format */
		pos = skb_put(skb, 2 * sband->n_channels + 2);
		*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
		*pos++ = 2 * sband->n_channels;
		for (i = 0; i < sband->n_channels; i++) {
			*pos++ = ieee80211_frequency_to_channel(
					sband->channels[i].center_freq);
			*pos++ = 1; /* one channel in the subband*/
		}
	}

	if (ifsta->extra_ie) {
		pos = skb_put(skb, ifsta->extra_ie_len);
		memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
	}

	if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
		pos = skb_put(skb, 9);
		*pos++ = WLAN_EID_VENDOR_SPECIFIC;
		*pos++ = 7; /* len */
		*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
		*pos++ = 0x50;
		*pos++ = 0xf2;
		*pos++ = 2; /* WME */
		*pos++ = 0; /* WME info */
		*pos++ = 1; /* WME ver */
		*pos++ = 0;
	}

	/* wmm support is a must to HT */
	if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
	    sband->ht_info.ht_supported &&
	    (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
		struct ieee80211_ht_addt_info *ht_add_info =
			(struct ieee80211_ht_addt_info *)ht_add_ie;
		u16 cap = sband->ht_info.cap;
		__le16 tmp;
		u32 flags = local->hw.conf.channel->flags;

		switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
		case IEEE80211_HT_IE_CHA_SEC_ABOVE:
			if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
				cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
				cap &= ~IEEE80211_HT_CAP_SGI_40;
			}
			break;
		case IEEE80211_HT_IE_CHA_SEC_BELOW:
			if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
				cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
				cap &= ~IEEE80211_HT_CAP_SGI_40;
			}
			break;
		}

		tmp = cpu_to_le16(cap);
		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
		*pos++ = WLAN_EID_HT_CAPABILITY;
		*pos++ = sizeof(struct ieee80211_ht_cap);
		memset(pos, 0, sizeof(struct ieee80211_ht_cap));
		memcpy(pos, &tmp, sizeof(u16));
		pos += sizeof(u16);
		/* TODO: needs a define here for << 2 */
		*pos++ = sband->ht_info.ampdu_factor |
			 (sband->ht_info.ampdu_density << 2);
		memcpy(pos, sband->ht_info.supp_mcs_set, 16);
	}

	kfree(ifsta->assocreq_ies);
	ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
	ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
	if (ifsta->assocreq_ies)
		memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);

438
	ieee80211_tx_skb(sdata, skb, 0);
439
440
441
}


442
443
static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
					   u16 stype, u16 reason)
444
445
{
	struct ieee80211_local *local = sdata->local;
446
	struct ieee80211_if_sta *ifsta = &sdata->u.sta;
447
448
449
450
451
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;

	skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
	if (!skb) {
452
453
		printk(KERN_DEBUG "%s: failed to allocate buffer for "
		       "deauth/disassoc frame\n", sdata->dev->name);
454
455
456
457
458
459
460
461
462
		return;
	}
	skb_reserve(skb, local->hw.extra_tx_headroom);

	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
	memset(mgmt, 0, 24);
	memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
	memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
	memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
463
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
464
	skb_put(skb, 2);
465
	/* u.deauth.reason_code == u.disassoc.reason_code */
466
467
	mgmt->u.deauth.reason_code = cpu_to_le16(reason);

468
	ieee80211_tx_skb(sdata, skb, 0);
469
470
}

Johannes Berg's avatar
Johannes Berg committed
471
/* MLME */
472
static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
473
					 struct ieee80211_sta_bss *bss)
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
{
	struct ieee80211_local *local = sdata->local;
	int i, have_higher_than_11mbit = 0;

	/* cf. IEEE 802.11 9.2.12 */
	for (i = 0; i < bss->supp_rates_len; i++)
		if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
			have_higher_than_11mbit = 1;

	if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
	    have_higher_than_11mbit)
		sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
	else
		sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;

489
	ieee80211_set_wmm_default(sdata);
490
491
}

492
static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
493
494
495
496
497
498
499
500
				     struct ieee80211_if_sta *ifsta,
				     u8 *wmm_param, size_t wmm_param_len)
{
	struct ieee80211_tx_queue_params params;
	size_t left;
	int count;
	u8 *pos;

501
502
503
504
505
506
	if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
		return;

	if (!wmm_param)
		return;

507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
	if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
		return;
	count = wmm_param[6] & 0x0f;
	if (count == ifsta->wmm_last_param_set)
		return;
	ifsta->wmm_last_param_set = count;

	pos = wmm_param + 8;
	left = wmm_param_len - 8;

	memset(&params, 0, sizeof(params));

	if (!local->ops->conf_tx)
		return;

	local->wmm_acm = 0;
	for (; left >= 4; left -= 4, pos += 4) {
		int aci = (pos[0] >> 5) & 0x03;
		int acm = (pos[0] >> 4) & 0x01;
		int queue;

		switch (aci) {
		case 1:
Johannes Berg's avatar
Johannes Berg committed
530
			queue = 3;
Johannes Berg's avatar
Johannes Berg committed
531
			if (acm)
532
533
534
				local->wmm_acm |= BIT(0) | BIT(3);
			break;
		case 2:
Johannes Berg's avatar
Johannes Berg committed
535
			queue = 1;
Johannes Berg's avatar
Johannes Berg committed
536
			if (acm)
537
538
539
				local->wmm_acm |= BIT(4) | BIT(5);
			break;
		case 3:
Johannes Berg's avatar
Johannes Berg committed
540
			queue = 0;
Johannes Berg's avatar
Johannes Berg committed
541
			if (acm)
542
543
544
545
				local->wmm_acm |= BIT(6) | BIT(7);
			break;
		case 0:
		default:
Johannes Berg's avatar
Johannes Berg committed
546
			queue = 2;
Johannes Berg's avatar
Johannes Berg committed
547
			if (acm)
548
549
550
551
552
553
554
				local->wmm_acm |= BIT(1) | BIT(2);
			break;
		}

		params.aifs = pos[0] & 0x0f;
		params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
		params.cw_min = ecw2cw(pos[1] & 0x0f);
555
		params.txop = get_unaligned_le16(pos + 2);
556
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
557
		printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
558
		       "cWmin=%d cWmax=%d txop=%d\n",
559
		       local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
560
561
		       params.cw_max, params.txop);
#endif
562
563
564
565
		/* TODO: handle ACM (block TX, fallback to next lowest allowed
		 * AC for now) */
		if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
			printk(KERN_DEBUG "%s: failed to set TX queue "
566
			       "parameters for queue %d\n", local->mdev->name, queue);
567
568
569
570
		}
	}
}

571
572
573
static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
					   bool use_protection,
					   bool use_short_preamble)
574
{
575
	struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
576
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
577
	struct ieee80211_if_sta *ifsta = &sdata->u.sta;
578
	DECLARE_MAC_BUF(mac);
579
#endif
580
	u32 changed = 0;
581

582
	if (use_protection != bss_conf->use_cts_prot) {
583
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
584
585
		if (net_ratelimit()) {
			printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
586
			       "%s)\n",
587
			       sdata->dev->name,
588
			       use_protection ? "enabled" : "disabled",
589
			       print_mac(mac, ifsta->bssid));
590
		}
591
#endif
592
593
		bss_conf->use_cts_prot = use_protection;
		changed |= BSS_CHANGED_ERP_CTS_PROT;
594
	}
595

596
	if (use_short_preamble != bss_conf->use_short_preamble) {
597
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
598
599
		if (net_ratelimit()) {
			printk(KERN_DEBUG "%s: switched to %s barker preamble"
600
			       " (BSSID=%s)\n",
601
			       sdata->dev->name,
602
			       use_short_preamble ? "short" : "long",
603
			       print_mac(mac, ifsta->bssid));
604
		}
605
#endif
606
		bss_conf->use_short_preamble = use_short_preamble;
607
		changed |= BSS_CHANGED_ERP_PREAMBLE;
608
	}
609

610
	return changed;
611
612
}

613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
				   u8 erp_value)
{
	bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
	bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;

	return ieee80211_handle_protect_preamb(sdata,
			use_protection, use_short_preamble);
}

static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
					   struct ieee80211_sta_bss *bss)
{
	u32 changed = 0;

	if (bss->has_erp_value)
		changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
	else {
		u16 capab = bss->capability;
		changed |= ieee80211_handle_protect_preamb(sdata, false,
				(capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
	}

	return changed;
}

639
640
641
642
643
644
645
646
647
648
649
static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
					struct ieee80211_if_sta *ifsta)
{
	union iwreq_data wrqu;
	memset(&wrqu, 0, sizeof(wrqu));
	if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
		memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
	wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
}

650
static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
651
652
653
654
655
					 struct ieee80211_if_sta *ifsta)
{
	union iwreq_data wrqu;

	if (ifsta->assocreq_ies) {
656
657
		memset(&wrqu, 0, sizeof(wrqu));
		wrqu.data.length = ifsta->assocreq_ies_len;
658
		wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
659
				    ifsta->assocreq_ies);
660
	}
661
662
663
	if (ifsta->assocresp_ies) {
		memset(&wrqu, 0, sizeof(wrqu));
		wrqu.data.length = ifsta->assocresp_ies_len;
664
		wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
665
				    ifsta->assocresp_ies);
666
667
668
669
	}
}


670
static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
671
				     struct ieee80211_if_sta *ifsta)
672
{
673
	struct ieee80211_local *local = sdata->local;
Tomas Winkler's avatar
Tomas Winkler committed
674
	struct ieee80211_conf *conf = &local_to_hw(local)->conf;
675
	u32 changed = BSS_CHANGED_ASSOC;
676

677
	struct ieee80211_sta_bss *bss;
678

679
	ifsta->flags |= IEEE80211_STA_ASSOCIATED;
680

681
682
	if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
		return;
683

684
685
686
687
688
689
690
691
	bss = ieee80211_rx_bss_get(local, ifsta->bssid,
				   conf->channel->center_freq,
				   ifsta->ssid, ifsta->ssid_len);
	if (bss) {
		/* set timing information */
		sdata->bss_conf.beacon_int = bss->beacon_int;
		sdata->bss_conf.timestamp = bss->timestamp;
		sdata->bss_conf.dtim_period = bss->dtim_period;
692

693
		changed |= ieee80211_handle_bss_capability(sdata, bss);
694
695

		ieee80211_rx_bss_put(local, bss);
696
697
	}

698
699
700
701
702
	if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
		changed |= BSS_CHANGED_HT;
		sdata->bss_conf.assoc_ht = 1;
		sdata->bss_conf.ht_conf = &conf->ht_conf;
		sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
703
	}
704

705
706
707
	ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
	memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
	ieee80211_sta_send_associnfo(sdata, ifsta);
708

709
710
	ifsta->last_probe = jiffies;
	ieee80211_led_assoc(local, 1);
711

712
713
	sdata->bss_conf.assoc = 1;
	ieee80211_bss_info_change_notify(sdata, changed);
714

715
716
	netif_tx_start_all_queues(sdata->dev);
	netif_carrier_on(sdata->dev);
717

718
	ieee80211_sta_send_apinfo(sdata, ifsta);
719
720
}

721
722
static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
				   struct ieee80211_if_sta *ifsta)
723
{
724
	DECLARE_MAC_BUF(mac);
725

726
727
728
729
730
	ifsta->direct_probe_tries++;
	if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
		printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
		       sdata->dev->name, print_mac(mac, ifsta->bssid));
		ifsta->state = IEEE80211_STA_MLME_DISABLED;
731
732
733
		return;
	}

734
735
736
	printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
			sdata->dev->name, print_mac(mac, ifsta->bssid),
			ifsta->direct_probe_tries);
737

738
	ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
739

740
741
742
743
744
745
746
747
748
	set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);

	/* Direct probe is sent to broadcast address as some APs
	 * will not answer to direct packet in unassociated state.
	 */
	ieee80211_send_probe_req(sdata, NULL,
				 ifsta->ssid, ifsta->ssid_len);

	mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
Johannes Berg's avatar
Johannes Berg committed
749
}
750

751
752
753

static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
				   struct ieee80211_if_sta *ifsta)
754
{
755
	DECLARE_MAC_BUF(mac);
756

757
758
759
760
761
762
	ifsta->auth_tries++;
	if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
		printk(KERN_DEBUG "%s: authentication with AP %s"
		       " timed out\n",
		       sdata->dev->name, print_mac(mac, ifsta->bssid));
		ifsta->state = IEEE80211_STA_MLME_DISABLED;
763
764
765
		return;
	}

766
767
768
	ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
	printk(KERN_DEBUG "%s: authenticate with AP %s\n",
	       sdata->dev->name, print_mac(mac, ifsta->bssid));
769

770
771
772
	ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);

	mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
773
774
}

775
776
777
778
779
780
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
				   struct ieee80211_if_sta *ifsta, bool deauth,
				   bool self_disconnected, u16 reason)
{
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;
781
	u32 changed = BSS_CHANGED_ASSOC;
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797

	rcu_read_lock();

	sta = sta_info_get(local, ifsta->bssid);
	if (!sta) {
		rcu_read_unlock();
		return;
	}

	if (deauth) {
		ifsta->direct_probe_tries = 0;
		ifsta->auth_tries = 0;
	}
	ifsta->assoc_scan_tries = 0;
	ifsta->assoc_tries = 0;

798
	netif_tx_stop_all_queues(sdata->dev);
799
800
801
802
803
804
	netif_carrier_off(sdata->dev);

	ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);

	if (self_disconnected) {
		if (deauth)
805
806
			ieee80211_send_deauth_disassoc(sdata,
				IEEE80211_STYPE_DEAUTH, reason);
807
		else
808
809
			ieee80211_send_deauth_disassoc(sdata,
				IEEE80211_STYPE_DISASSOC, reason);
810
811
	}

812
813
814
815
816
817
818
819
820
821
822
823
824
825
	ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
	changed |= ieee80211_reset_erp_info(sdata);

	if (sdata->bss_conf.assoc_ht)
		changed |= BSS_CHANGED_HT;

	sdata->bss_conf.assoc_ht = 0;
	sdata->bss_conf.ht_conf = NULL;
	sdata->bss_conf.ht_bss_conf = NULL;

	ieee80211_led_assoc(local, 0);
	sdata->bss_conf.assoc = 0;

	ieee80211_sta_send_apinfo(sdata, ifsta);
826
827
828
829
830
831
832
833
834
835

	if (self_disconnected)
		ifsta->state = IEEE80211_STA_MLME_DISABLED;

	sta_info_unlink(&sta);

	rcu_read_unlock();

	sta_info_destroy(sta);
}
836

837
838
839
840
841
842
843
844
static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
{
	if (!sdata || !sdata->default_key ||
	    sdata->default_key->conf.alg != ALG_WEP)
		return 0;
	return 1;
}

845
static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
846
847
				      struct ieee80211_if_sta *ifsta)
{
848
	struct ieee80211_local *local = sdata->local;
849
	struct ieee80211_sta_bss *bss;
850
851
852
	int bss_privacy;
	int wep_privacy;
	int privacy_invoked;
853

854
	if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
855
856
		return 0;

857
	bss = ieee80211_rx_bss_get(local, ifsta->bssid,
858
				   local->hw.conf.channel->center_freq,
859
				   ifsta->ssid, ifsta->ssid_len);
860
861
862
	if (!bss)
		return 0;

863
	bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
864
	wep_privacy = !!ieee80211_sta_wep_configured(sdata);
865
	privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
866

867
	ieee80211_rx_bss_put(local, bss);
868

869
870
871
872
	if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
		return 0;

	return 1;
873
874
}

875
static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
876
877
				struct ieee80211_if_sta *ifsta)
{
878
879
	DECLARE_MAC_BUF(mac);

880
881
	ifsta->assoc_tries++;
	if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
882
		printk(KERN_DEBUG "%s: association with AP %s"
883
		       " timed out\n",
884
		       sdata->dev->name, print_mac(mac, ifsta->bssid));
885
		ifsta->state = IEEE80211_STA_MLME_DISABLED;
886
887
888
		return;
	}

889
	ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
890
	printk(KERN_DEBUG "%s: associate with AP %s\n",
891
892
	       sdata->dev->name, print_mac(mac, ifsta->bssid));
	if (ieee80211_privacy_mismatch(sdata, ifsta)) {
893
		printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
894
		       "mixed-cell disabled - abort association\n", sdata->dev->name);
895
		ifsta->state = IEEE80211_STA_MLME_DISABLED;
896
897
898
		return;
	}

899
	ieee80211_send_assoc(sdata, ifsta);
900
901
902
903
904

	mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
}


905
static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
906
907
				 struct ieee80211_if_sta *ifsta)
{
908
	struct ieee80211_local *local = sdata->local;
909
910
	struct sta_info *sta;
	int disassoc;
911
	DECLARE_MAC_BUF(mac);
912
913
914
915
916
917

	/* TODO: start monitoring current AP signal quality and number of
	 * missed beacons. Scan other channels every now and then and search
	 * for better APs. */
	/* TODO: remove expired BSSes */

918
	ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
919

920
921
	rcu_read_lock();

922
923
	sta = sta_info_get(local, ifsta->bssid);
	if (!sta) {
924
		printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
925
		       sdata->dev->name, print_mac(mac, ifsta->bssid));
926
927
928
929
930
		disassoc = 1;
	} else {
		disassoc = 0;
		if (time_after(jiffies,
			       sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
931
			if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
932
				printk(KERN_DEBUG "%s: No ProbeResp from "
933
				       "current AP %s - assume out of "
934
				       "range\n",
935
				       sdata->dev->name, print_mac(mac, ifsta->bssid));
936
				disassoc = 1;
937
			} else
938
				ieee80211_send_probe_req(sdata, ifsta->bssid,
939
940
							 local->scan_ssid,
							 local->scan_ssid_len);
941
			ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
942
		} else {
943
			ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
944
945
946
			if (time_after(jiffies, ifsta->last_probe +
				       IEEE80211_PROBE_INTERVAL)) {
				ifsta->last_probe = jiffies;
947
				ieee80211_send_probe_req(sdata, ifsta->bssid,
948
949
950
951
952
							 ifsta->ssid,
							 ifsta->ssid_len);
			}
		}
	}
953
954
955

	rcu_read_unlock();

Johannes Berg's avatar
Johannes Berg committed
956
957
958
959
960
961
	if (disassoc)
		ieee80211_set_disassoc(sdata, ifsta, true, true,
					WLAN_REASON_PREV_AUTH_NOT_VALID);
	else
		mod_timer(&ifsta->timer, jiffies +
				      IEEE80211_MONITORING_INTERVAL);
962
963
964
}


965
static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
966
967
				     struct ieee80211_if_sta *ifsta)
{
968
	printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
969
	ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
970
	ieee80211_associate(sdata, ifsta);
971
972
973
}


974
static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
975
976
977
978
979
980
981
982
				     struct ieee80211_if_sta *ifsta,
				     struct ieee80211_mgmt *mgmt,
				     size_t len)
{
	u8 *pos;
	struct ieee802_11_elems elems;

	pos = mgmt->u.auth.variable;
983
	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
984
	if (!elems.challenge)
985
		return;
986
	ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
987
988
989
			    elems.challenge_len + 2, 1);
}

990
static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
991
992
993
994
995
				   struct ieee80211_if_sta *ifsta,
				   struct ieee80211_mgmt *mgmt,
				   size_t len)
{
	u16 auth_alg, auth_transaction, status_code;
996
	DECLARE_MAC_BUF(mac);
997

998
	if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
999
	    sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1000
1001
		return;

1002
	if (len < 24 + 6)
1003
1004
		return;

1005
	if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1006
	    memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1007
1008
		return;

1009
	if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1010
	    memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1011
1012
1013
1014
1015
1016
		return;

	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
	auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
	status_code = le16_to_cpu(mgmt->u.auth.status_code);

1017
	if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1018
1019
		/*
		 * IEEE 802.11 standard does not require authentication in IBSS
1020
1021
1022
		 * networks and most implementations do not seem to use it.
		 * However, try to reply to authentication attempts if someone
		 * has actually implemented this.
1023
		 */
1024
		if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1025
			return;
1026
		ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1027
1028
1029
	}

	if (auth_alg != ifsta->auth_alg ||
1030
	    auth_transaction != ifsta->auth_transaction)
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
		return;

	if (status_code != WLAN_STATUS_SUCCESS) {
		if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
			u8 algs[3];
			const int num_algs = ARRAY_SIZE(algs);
			int i, pos;
			algs[0] = algs[1] = algs[2] = 0xff;
			if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
				algs[0] = WLAN_AUTH_OPEN;
			if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
				algs[1] = WLAN_AUTH_SHARED_KEY;
			if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
				algs[2] = WLAN_AUTH_LEAP;
			if (ifsta->auth_alg == WLAN_AUTH_OPEN)
				pos = 0;
			else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
				pos = 1;
			else
				pos = 2;
			for (i = 0; i < num_algs; i++) {
				pos++;
				if (pos >= num_algs)
					pos = 0;
				if (algs[pos] == ifsta->auth_alg ||
				    algs[pos] == 0xff)
					continue;
				if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1059
				    !ieee80211_sta_wep_configured(sdata))
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
					continue;
				ifsta->auth_alg = algs[pos];
				break;
			}
		}
		return;
	}

	switch (ifsta->auth_alg) {
	case WLAN_AUTH_OPEN:
	case WLAN_AUTH_LEAP:
1071
		ieee80211_auth_completed(sdata, ifsta);
1072
1073
1074
		break;
	case WLAN_AUTH_SHARED_KEY:
		if (ifsta->auth_transaction == 4)
1075
			ieee80211_auth_completed(sdata, ifsta);
1076
		else
1077
			ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1078
1079
1080
1081
1082
		break;
	}
}


1083
static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1084
1085
1086
1087
1088
				     struct ieee80211_if_sta *ifsta,
				     struct ieee80211_mgmt *mgmt,
				     size_t len)
{
	u16 reason_code;
1089
	DECLARE_MAC_BUF(mac);
1090

1091
	if (len < 24 + 2)
1092
1093
		return;

1094
	if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1095
1096
1097
1098
		return;

	reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);

Johannes Berg's avatar
Johannes Berg committed
1099
	if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1100
		printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1101

1102
1103
1104
	if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
	    ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
	    ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1105
		ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1106
1107
1108
1109
		mod_timer(&ifsta->timer, jiffies +
				      IEEE80211_RETRY_AUTH_INTERVAL);
	}

1110
	ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1111
	ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1112
1113
1114
}


1115
static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1116
1117
1118
1119
1120
				       struct ieee80211_if_sta *ifsta,
				       struct ieee80211_mgmt *mgmt,
				       size_t len)
{
	u16 reason_code;
1121
	DECLARE_MAC_BUF(mac);
1122

1123
	if (len < 24 + 2)
1124
1125
		return;

1126
	if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1127
1128
1129
1130
		return;

	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);

1131
	if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1132
		printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
1133

1134
1135
	if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
		ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1136
1137
1138
1139
		mod_timer(&ifsta->timer, jiffies +
				      IEEE80211_RETRY_AUTH_INTERVAL);
	}

1140
	ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1141
1142
1143
}


1144
static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1145
1146
1147
1148
1149
					 struct ieee80211_if_sta *ifsta,
					 struct ieee80211_mgmt *mgmt,
					 size_t len,
					 int reassoc)
{
1150
	struct ieee80211_local *local = sdata->local;
1151
	struct ieee80211_supported_band *sband;
1152
	struct sta_info *sta;
1153
	u64 rates, basic_rates;
1154
1155
	u16 capab_info, status_code, aid;
	struct ieee802_11_elems elems;
1156
	struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1157
1158
	u8 *pos;
	int i, j;
1159
	DECLARE_MAC_BUF(mac);
1160
	bool have_higher_than_11mbit = false;