aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/ipw2x00/libipw_wx.c
blob: 3633c6682e4967575ef040ad620fbb8550531c35 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
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
193
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
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
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
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
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
/******************************************************************************

  Copyright(c) 2004-2005 Intel Corporation. All rights reserved.

  Portions of this file are based on the WEP enablement code provided by the
  Host AP project hostap-drivers v0.1.3
  Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
  <j@w1.fi>
  Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston, MA  02111-1307, USA.

  The full GNU General Public License is included in this distribution in the
  file called LICENSE.

  Contact Information:
  Intel Linux Wireless <ilw@linux.intel.com>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

******************************************************************************/

#include <linux/kmod.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/jiffies.h>

#include <net/lib80211.h>
#include <linux/wireless.h>

#include "libipw.h"

static const char *libipw_modes[] = {
	"?", "a", "b", "ab", "g", "ag", "bg", "abg"
};

static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
{
	unsigned long end = jiffies;

	if (end >= start)
		return jiffies_to_msecs(end - start);

	return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
}

#define MAX_CUSTOM_LEN 64
static char *libipw_translate_scan(struct libipw_device *ieee,
				      char *start, char *stop,
				      struct libipw_network *network,
				      struct iw_request_info *info)
{
	char custom[MAX_CUSTOM_LEN];
	char *p;
	struct iw_event iwe;
	int i, j;
	char *current_val;	/* For rates */
	u8 rate;

	/* First entry *MUST* be the AP MAC address */
	iwe.cmd = SIOCGIWAP;
	iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
	memcpy(iwe.u.ap_addr.sa_data, network->bssid, ETH_ALEN);
	start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_ADDR_LEN);

	/* Remaining entries will be displayed in the order we provide them */

	/* Add the ESSID */
	iwe.cmd = SIOCGIWESSID;
	iwe.u.data.flags = 1;
	iwe.u.data.length = min(network->ssid_len, (u8) 32);
	start = iwe_stream_add_point(info, start, stop,
				     &iwe, network->ssid);

	/* Add the protocol name */
	iwe.cmd = SIOCGIWNAME;
	snprintf(iwe.u.name, IFNAMSIZ, "IEEE 802.11%s",
		 libipw_modes[network->mode]);
	start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_CHAR_LEN);

	/* Add mode */
	iwe.cmd = SIOCGIWMODE;
	if (network->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
		if (network->capability & WLAN_CAPABILITY_ESS)
			iwe.u.mode = IW_MODE_MASTER;
		else
			iwe.u.mode = IW_MODE_ADHOC;

		start = iwe_stream_add_event(info, start, stop,
					     &iwe, IW_EV_UINT_LEN);
	}

	/* Add channel and frequency */
	/* Note : userspace automatically computes channel using iwrange */
	iwe.cmd = SIOCGIWFREQ;
	iwe.u.freq.m = libipw_channel_to_freq(ieee, network->channel);
	iwe.u.freq.e = 6;
	iwe.u.freq.i = 0;
	start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_FREQ_LEN);

	/* Add encryption capability */
	iwe.cmd = SIOCGIWENCODE;
	if (network->capability & WLAN_CAPABILITY_PRIVACY)
		iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
	else
		iwe.u.data.flags = IW_ENCODE_DISABLED;
	iwe.u.data.length = 0;
	start = iwe_stream_add_point(info, start, stop,
				     &iwe, network->ssid);

	/* Add basic and extended rates */
	/* Rate : stuffing multiple values in a single event require a bit
	 * more of magic - Jean II */
	current_val = start + iwe_stream_lcp_len(info);
	iwe.cmd = SIOCGIWRATE;
	/* Those two flags are ignored... */
	iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;

	for (i = 0, j = 0; i < network->rates_len;) {
		if (j < network->rates_ex_len &&
		    ((network->rates_ex[j] & 0x7F) <
		     (network->rates[i] & 0x7F)))
			rate = network->rates_ex[j++] & 0x7F;
		else
			rate = network->rates[i++] & 0x7F;
		/* Bit rate given in 500 kb/s units (+ 0x80) */
		iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
		/* Add new value to event */
		current_val = iwe_stream_add_value(info, start, current_val,
						   stop, &iwe, IW_EV_PARAM_LEN);
	}
	for (; j < network->rates_ex_len; j++) {
		rate = network->rates_ex[j] & 0x7F;
		/* Bit rate given in 500 kb/s units (+ 0x80) */
		iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
		/* Add new value to event */
		current_val = iwe_stream_add_value(info, start, current_val,
						   stop, &iwe, IW_EV_PARAM_LEN);
	}
	/* Check if we added any rate */
	if ((current_val - start) > iwe_stream_lcp_len(info))
		start = current_val;

	/* Add quality statistics */
	iwe.cmd = IWEVQUAL;
	iwe.u.qual.updated = IW_QUAL_QUAL_UPDATED | IW_QUAL_LEVEL_UPDATED |
	    IW_QUAL_NOISE_UPDATED;

	if (!(network->stats.mask & LIBIPW_STATMASK_RSSI)) {
		iwe.u.qual.updated |= IW_QUAL_QUAL_INVALID |
		    IW_QUAL_LEVEL_INVALID;
		iwe.u.qual.qual = 0;
	} else {
		if (ieee->perfect_rssi == ieee->worst_rssi)
			iwe.u.qual.qual = 100;
		else
			iwe.u.qual.qual =
			    (100 *
			     (ieee->perfect_rssi - ieee->worst_rssi) *
			     (ieee->perfect_rssi - ieee->worst_rssi) -
			     (ieee->perfect_rssi - network->stats.rssi) *
			     (15 * (ieee->perfect_rssi - ieee->worst_rssi) +
			      62 * (ieee->perfect_rssi -
				    network->stats.rssi))) /
			    ((ieee->perfect_rssi -
			      ieee->worst_rssi) * (ieee->perfect_rssi -
						   ieee->worst_rssi));
		if (iwe.u.qual.qual > 100)
			iwe.u.qual.qual = 100;
		else if (iwe.u.qual.qual < 1)
			iwe.u.qual.qual = 0;
	}

	if (!(network->stats.mask & LIBIPW_STATMASK_NOISE)) {
		iwe.u.qual.updated |= IW_QUAL_NOISE_INVALID;
		iwe.u.qual.noise = 0;
	} else {
		iwe.u.qual.noise = network->stats.noise;
	}

	if (!(network->stats.mask & LIBIPW_STATMASK_SIGNAL)) {
		iwe.u.qual.updated |= IW_QUAL_LEVEL_INVALID;
		iwe.u.qual.level = 0;
	} else {
		iwe.u.qual.level = network->stats.signal;
	}

	start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_QUAL_LEN);

	iwe.cmd = IWEVCUSTOM;
	p = custom;

	iwe.u.data.length = p - custom;
	if (iwe.u.data.length)
		start = iwe_stream_add_point(info, start, stop, &iwe, custom);

	memset(&iwe, 0, sizeof(iwe));
	if (network->wpa_ie_len) {
		char buf[MAX_WPA_IE_LEN];
		memcpy(buf, network->wpa_ie, network->wpa_ie_len);
		iwe.cmd = IWEVGENIE;
		iwe.u.data.length = network->wpa_ie_len;
		start = iwe_stream_add_point(info, start, stop, &iwe, buf);
	}

	memset(&iwe, 0, sizeof(iwe));
	if (network->rsn_ie_len) {
		char buf[MAX_WPA_IE_LEN];
		memcpy(buf, network->rsn_ie, network->rsn_ie_len);
		iwe.cmd = IWEVGENIE;
		iwe.u.data.length = network->rsn_ie_len;
		start = iwe_stream_add_point(info, start, stop, &iwe, buf);
	}

	/* Add EXTRA: Age to display seconds since last beacon/probe response
	 * for given network. */
	iwe.cmd = IWEVCUSTOM;
	p = custom;
	p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
		      " Last beacon: %ums ago",
		      elapsed_jiffies_msecs(network->last_scanned));
	iwe.u.data.length = p - custom;
	if (iwe.u.data.length)
		start = iwe_stream_add_point(info, start, stop, &iwe, custom);

	/* Add spectrum management information */
	iwe.cmd = -1;
	p = custom;
	p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), " Channel flags: ");

	if (libipw_get_channel_flags(ieee, network->channel) &
	    LIBIPW_CH_INVALID) {
		iwe.cmd = IWEVCUSTOM;
		p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), "INVALID ");
	}

	if (libipw_get_channel_flags(ieee, network->channel) &
	    LIBIPW_CH_RADAR_DETECT) {
		iwe.cmd = IWEVCUSTOM;
		p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), "DFS ");
	}

	if (iwe.cmd == IWEVCUSTOM) {
		iwe.u.data.length = p - custom;
		start = iwe_stream_add_point(info, start, stop, &iwe, custom);
	}

	return start;
}

#define SCAN_ITEM_SIZE 128

int libipw_wx_get_scan(struct libipw_device *ieee,
			  struct iw_request_info *info,
			  union iwreq_data *wrqu, char *extra)
{
	struct libipw_network *network;
	unsigned long flags;
	int err = 0;

	char *ev = extra;
	char *stop = ev + wrqu->data.length;
	int i = 0;
	DECLARE_SSID_BUF(ssid);

	LIBIPW_DEBUG_WX("Getting scan\n");

	spin_lock_irqsave(&ieee->lock, flags);

	list_for_each_entry(network, &ieee->network_list, list) {
		i++;
		if (stop - ev < SCAN_ITEM_SIZE) {
			err = -E2BIG;
			break;
		}

		if (ieee->scan_age == 0 ||
		    time_after(network->last_scanned + ieee->scan_age, jiffies))
			ev = libipw_translate_scan(ieee, ev, stop, network,
						      info);
		else {
			LIBIPW_DEBUG_SCAN("Not showing network '%s ("
					     "%pM)' due to age (%ums).\n",
					     print_ssid(ssid, network->ssid,
							 network->ssid_len),
					     network->bssid,
					     elapsed_jiffies_msecs(
					               network->last_scanned));
		}
	}

	spin_unlock_irqrestore(&ieee->lock, flags);

	wrqu->data.length = ev - extra;
	wrqu->data.flags = 0;

	LIBIPW_DEBUG_WX("exit: %d networks returned.\n", i);

	return err;
}

int libipw_wx_set_encode(struct libipw_device *ieee,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu, char *keybuf)
{
	struct iw_point *erq = &(wrqu->encoding);
	struct net_device *dev = ieee->dev;
	struct libipw_security sec = {
		.flags = 0
	};
	int i, key, key_provided, len;
	struct lib80211_crypt_data **crypt;
	int host_crypto = ieee->host_encrypt || ieee->host_decrypt || ieee->host_build_iv;
	DECLARE_SSID_BUF(ssid);

	LIBIPW_DEBUG_WX("SET_ENCODE\n");

	key = erq->flags & IW_ENCODE_INDEX;
	if (key) {
		if (key > WEP_KEYS)
			return -EINVAL;
		key--;
		key_provided = 1;
	} else {
		key_provided = 0;
		key = ieee->crypt_info.tx_keyidx;
	}

	LIBIPW_DEBUG_WX("Key: %d [%s]\n", key, key_provided ?
			   "provided" : "default");

	crypt = &ieee->crypt_info.crypt[key];

	if (erq->flags & IW_ENCODE_DISABLED) {
		if (key_provided && *crypt) {
			LIBIPW_DEBUG_WX("Disabling encryption on key %d.\n",
					   key);
			lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
		} else
			LIBIPW_DEBUG_WX("Disabling encryption.\n");

		/* Check all the keys to see if any are still configured,
		 * and if no key index was provided, de-init them all */
		for (i = 0; i < WEP_KEYS; i++) {
			if (ieee->crypt_info.crypt[i] != NULL) {
				if (key_provided)
					break;
				lib80211_crypt_delayed_deinit(&ieee->crypt_info,
							       &ieee->crypt_info.crypt[i]);
			}
		}

		if (i == WEP_KEYS) {
			sec.enabled = 0;
			sec.encrypt = 0;
			sec.level = SEC_LEVEL_0;
			sec.flags |= SEC_ENABLED | SEC_LEVEL | SEC_ENCRYPT;
		}

		goto done;
	}

	sec.enabled = 1;
	sec.encrypt = 1;
	sec.flags |= SEC_ENABLED | SEC_ENCRYPT;

	if (*crypt != NULL && (*crypt)->ops != NULL &&
	    strcmp((*crypt)->ops->name, "WEP") != 0) {
		/* changing to use WEP; deinit previously used algorithm
		 * on this key */
		lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
	}

	if (*crypt == NULL && host_crypto) {
		struct lib80211_crypt_data *new_crypt;

		/* take WEP into use */
		new_crypt = kzalloc(sizeof(struct lib80211_crypt_data),
				    GFP_KERNEL);
		if (new_crypt == NULL)
			return -ENOMEM;
		new_crypt->ops = lib80211_get_crypto_ops("WEP");
		if (!new_crypt->ops) {
			request_module("lib80211_crypt_wep");
			new_crypt->ops = lib80211_get_crypto_ops("WEP");
		}

		if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
			new_crypt->priv = new_crypt->ops->init(key);

		if (!new_crypt->ops || !new_crypt->priv) {
			kfree(new_crypt);
			new_crypt = NULL;

			printk(KERN_WARNING "%s: could not initialize WEP: "
			       "load module lib80211_crypt_wep\n", dev->name);
			return -EOPNOTSUPP;
		}
		*crypt = new_crypt;
	}

	/* If a new key was provided, set it up */
	if (erq->length > 0) {
#ifdef CONFIG_LIBIPW_DEBUG
		DECLARE_SSID_BUF(ssid);
#endif

		len = erq->length <= 5 ? 5 : 13;
		memcpy(sec.keys[key], keybuf, erq->length);
		if (len > erq->length)
			memset(sec.keys[key] + erq->length, 0,
			       len - erq->length);
		LIBIPW_DEBUG_WX("Setting key %d to '%s' (%d:%d bytes)\n",
				   key, print_ssid(ssid, sec.keys[key], len),
				   erq->length, len);
		sec.key_sizes[key] = len;
		if (*crypt)
			(*crypt)->ops->set_key(sec.keys[key], len, NULL,
					       (*crypt)->priv);
		sec.flags |= (1 << key);
		/* This ensures a key will be activated if no key is
		 * explicitly set */
		if (key == sec.active_key)
			sec.flags |= SEC_ACTIVE_KEY;

	} else {
		if (host_crypto) {
			len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
						     NULL, (*crypt)->priv);
			if (len == 0) {
				/* Set a default key of all 0 */
				LIBIPW_DEBUG_WX("Setting key %d to all "
						   "zero.\n", key);
				memset(sec.keys[key], 0, 13);
				(*crypt)->ops->set_key(sec.keys[key], 13, NULL,
						       (*crypt)->priv);
				sec.key_sizes[key] = 13;
				sec.flags |= (1 << key);
			}
		}
		/* No key data - just set the default TX key index */
		if (key_provided) {
			LIBIPW_DEBUG_WX("Setting key %d to default Tx "
					   "key.\n", key);
			ieee->crypt_info.tx_keyidx = key;
			sec.active_key = key;
			sec.flags |= SEC_ACTIVE_KEY;
		}
	}
	if (erq->flags & (IW_ENCODE_OPEN | IW_ENCODE_RESTRICTED)) {
		ieee->open_wep = !(erq->flags & IW_ENCODE_RESTRICTED);
		sec.auth_mode = ieee->open_wep ? WLAN_AUTH_OPEN :
		    WLAN_AUTH_SHARED_KEY;
		sec.flags |= SEC_AUTH_MODE;
		LIBIPW_DEBUG_WX("Auth: %s\n",
				   sec.auth_mode == WLAN_AUTH_OPEN ?
				   "OPEN" : "SHARED KEY");
	}

	/* For now we just support WEP, so only set that security level...
	 * TODO: When WPA is added this is one place that needs to change */
	sec.flags |= SEC_LEVEL;
	sec.level = SEC_LEVEL_1;	/* 40 and 104 bit WEP */
	sec.encode_alg[key] = SEC_ALG_WEP;

      done:
	if (ieee->set_security)
		ieee->set_security(dev, &sec);

	/* Do not reset port if card is in Managed mode since resetting will
	 * generate new IEEE 802.11 authentication which may end up in looping
	 * with IEEE 802.1X.  If your hardware requires a reset after WEP
	 * configuration (for example... Prism2), implement the reset_port in
	 * the callbacks structures used to initialize the 802.11 stack. */
	if (ieee->reset_on_keychange &&
	    ieee->iw_mode != IW_MODE_INFRA &&
	    ieee->reset_port && ieee->reset_port(dev)) {
		printk(KERN_DEBUG "%s: reset_port failed\n", dev->name);
		return -EINVAL;
	}
	return 0;
}

int libipw_wx_get_encode(struct libipw_device *ieee,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu, char *keybuf)
{
	struct iw_point *erq = &(wrqu->encoding);
	int len, key;
	struct lib80211_crypt_data *crypt;
	struct libipw_security *sec = &ieee->sec;

	LIBIPW_DEBUG_WX("GET_ENCODE\n");

	key = erq->flags & IW_ENCODE_INDEX;
	if (key) {
		if (key > WEP_KEYS)
			return -EINVAL;
		key--;
	} else
		key = ieee->crypt_info.tx_keyidx;

	crypt = ieee->crypt_info.crypt[key];
	erq->flags = key + 1;

	if (!sec->enabled) {
		erq->length = 0;
		erq->flags |= IW_ENCODE_DISABLED;
		return 0;
	}

	len = sec->key_sizes[key];
	memcpy(keybuf, sec->keys[key], len);

	erq->length = len;
	erq->flags |= IW_ENCODE_ENABLED;

	if (ieee->open_wep)
		erq->flags |= IW_ENCODE_OPEN;
	else
		erq->flags |= IW_ENCODE_RESTRICTED;

	return 0;
}

int libipw_wx_set_encodeext(struct libipw_device *ieee,
			       struct iw_request_info *info,
			       union iwreq_data *wrqu, char *extra)
{
	struct net_device *dev = ieee->dev;
	struct iw_point *encoding = &wrqu->encoding;
	struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
	int i, idx, ret = 0;
	int group_key = 0;
	const char *alg, *module;
	struct lib80211_crypto_ops *ops;
	struct lib80211_crypt_data **crypt;

	struct libipw_security sec = {
		.flags = 0,
	};

	idx = encoding->flags & IW_ENCODE_INDEX;
	if (idx) {
		if (idx < 1 || idx > WEP_KEYS)
			return -EINVAL;
		idx--;
	} else
		idx = ieee->crypt_info.tx_keyidx;

	if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) {
		crypt = &ieee->crypt_info.crypt[idx];
		group_key = 1;
	} else {
		/* some Cisco APs use idx>0 for unicast in dynamic WEP */
		if (idx != 0 && ext->alg != IW_ENCODE_ALG_WEP)
			return -EINVAL;
		if (ieee->iw_mode == IW_MODE_INFRA)
			crypt = &ieee->crypt_info.crypt[idx];
		else
			return -EINVAL;
	}

	sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
	if ((encoding->flags & IW_ENCODE_DISABLED) ||
	    ext->alg == IW_ENCODE_ALG_NONE) {
		if (*crypt)
			lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);

		for (i = 0; i < WEP_KEYS; i++)
			if (ieee->crypt_info.crypt[i] != NULL)
				break;

		if (i == WEP_KEYS) {
			sec.enabled = 0;
			sec.encrypt = 0;
			sec.level = SEC_LEVEL_0;
			sec.flags |= SEC_LEVEL;
		}
		goto done;
	}

	sec.enabled = 1;
	sec.encrypt = 1;

	if (group_key ? !ieee->host_mc_decrypt :
	    !(ieee->host_encrypt || ieee->host_decrypt ||
	      ieee->host_encrypt_msdu))
		goto skip_host_crypt;

	switch (ext->alg) {
	case IW_ENCODE_ALG_WEP:
		alg = "WEP";
		module = "lib80211_crypt_wep";
		break;
	case IW_ENCODE_ALG_TKIP:
		alg = "TKIP";
		module = "lib80211_crypt_tkip";
		break;
	case IW_ENCODE_ALG_CCMP:
		alg = "CCMP";
		module = "lib80211_crypt_ccmp";
		break;
	default:
		LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
				   dev->name, ext->alg);
		ret = -EINVAL;
		goto done;
	}

	ops = lib80211_get_crypto_ops(alg);
	if (ops == NULL) {
		request_module(module);
		ops = lib80211_get_crypto_ops(alg);
	}
	if (ops == NULL) {
		LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
				   dev->name, ext->alg);
		ret = -EINVAL;
		goto done;
	}

	if (*crypt == NULL || (*crypt)->ops != ops) {
		struct lib80211_crypt_data *new_crypt;

		lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);

		new_crypt = kzalloc(sizeof(*new_crypt), GFP_KERNEL);
		if (new_crypt == NULL) {
			ret = -ENOMEM;
			goto done;
		}
		new_crypt->ops = ops;
		if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
			new_crypt->priv = new_crypt->ops->init(idx);
		if (new_crypt->priv == NULL) {
			kfree(new_crypt);
			ret = -EINVAL;
			goto done;
		}
		*crypt = new_crypt;
	}

	if (ext->key_len > 0 && (*crypt)->ops->set_key &&
	    (*crypt)->ops->set_key(ext->key, ext->key_len, ext->rx_seq,
				   (*crypt)->priv) < 0) {
		LIBIPW_DEBUG_WX("%s: key setting failed\n", dev->name);
		ret = -EINVAL;
		goto done;
	}

      skip_host_crypt:
	if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
		ieee->crypt_info.tx_keyidx = idx;
		sec.active_key = idx;
		sec.flags |= SEC_ACTIVE_KEY;
	}

	if (ext->alg != IW_ENCODE_ALG_NONE) {
		memcpy(sec.keys[idx], ext->key, ext->key_len);
		sec.key_sizes[idx] = ext->key_len;
		sec.flags |= (1 << idx);
		if (ext->alg == IW_ENCODE_ALG_WEP) {
			sec.encode_alg[idx] = SEC_ALG_WEP;
			sec.flags |= SEC_LEVEL;
			sec.level = SEC_LEVEL_1;
		} else if (ext->alg == IW_ENCODE_ALG_TKIP) {
			sec.encode_alg[idx] = SEC_ALG_TKIP;
			sec.flags |= SEC_LEVEL;
			sec.level = SEC_LEVEL_2;
		} else if (ext->alg == IW_ENCODE_ALG_CCMP) {
			sec.encode_alg[idx] = SEC_ALG_CCMP;
			sec.flags |= SEC_LEVEL;
			sec.level = SEC_LEVEL_3;
		}
		/* Don't set sec level for group keys. */
		if (group_key)
			sec.flags &= ~SEC_LEVEL;
	}
      done:
	if (ieee->set_security)
		ieee->set_security(ieee->dev, &sec);

	/*
	 * Do not reset port if card is in Managed mode since resetting will
	 * generate new IEEE 802.11 authentication which may end up in looping
	 * with IEEE 802.1X. If your hardware requires a reset after WEP
	 * configuration (for example... Prism2), implement the reset_port in
	 * the callbacks structures used to initialize the 802.11 stack.
	 */
	if (ieee->reset_on_keychange &&
	    ieee->iw_mode != IW_MODE_INFRA &&
	    ieee->reset_port && ieee->reset_port(dev)) {
		LIBIPW_DEBUG_WX("%s: reset_port failed\n", dev->name);
		return -EINVAL;
	}

	return ret;
}

int libipw_wx_get_encodeext(struct libipw_device *ieee,
			       struct iw_request_info *info,
			       union iwreq_data *wrqu, char *extra)
{
	struct iw_point *encoding = &wrqu->encoding;
	struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
	struct libipw_security *sec = &ieee->sec;
	int idx, max_key_len;

	max_key_len = encoding->length - sizeof(*ext);
	if (max_key_len < 0)
		return -EINVAL;

	idx = encoding->flags & IW_ENCODE_INDEX;
	if (idx) {
		if (idx < 1 || idx > WEP_KEYS)
			return -EINVAL;
		idx--;
	} else
		idx = ieee->crypt_info.tx_keyidx;

	if (!(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) &&
	    ext->alg != IW_ENCODE_ALG_WEP)
		if (idx != 0 || ieee->iw_mode != IW_MODE_INFRA)
			return -EINVAL;

	encoding->flags = idx + 1;
	memset(ext, 0, sizeof(*ext));

	if (!sec->enabled) {
		ext->alg = IW_ENCODE_ALG_NONE;
		ext->key_len = 0;
		encoding->flags |= IW_ENCODE_DISABLED;
	} else {
		if (sec->encode_alg[idx] == SEC_ALG_WEP)
			ext->alg = IW_ENCODE_ALG_WEP;
		else if (sec->encode_alg[idx] == SEC_ALG_TKIP)
			ext->alg = IW_ENCODE_ALG_TKIP;
		else if (sec->encode_alg[idx] == SEC_ALG_CCMP)
			ext->alg = IW_ENCODE_ALG_CCMP;
		else
			return -EINVAL;

		ext->key_len = sec->key_sizes[idx];
		memcpy(ext->key, sec->keys[idx], ext->key_len);
		encoding->flags |= IW_ENCODE_ENABLED;
		if (ext->key_len &&
		    (ext->alg == IW_ENCODE_ALG_TKIP ||
		     ext->alg == IW_ENCODE_ALG_CCMP))
			ext->ext_flags |= IW_ENCODE_EXT_TX_SEQ_VALID;

	}

	return 0;
}

EXPORT_SYMBOL(libipw_wx_set_encodeext);
EXPORT_SYMBOL(libipw_wx_get_encodeext);

EXPORT_SYMBOL(libipw_wx_get_scan);
EXPORT_SYMBOL(libipw_wx_set_encode);
EXPORT_SYMBOL(libipw_wx_get_encode);