1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3 
4   Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
5 
6   Portions of this file are based on the WEP enablement code provided by the
7   Host AP project hostap-drivers v0.1.3
8   Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
9   <j@w1.fi>
10   Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
11 
12 
13   Contact Information:
14   Intel Linux Wireless <ilw@linux.intel.com>
15   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
16 
17 ******************************************************************************/
18 
19 #include <linux/hardirq.h>
20 #include <linux/kmod.h>
21 #include <linux/slab.h>
22 #include <linux/module.h>
23 #include <linux/jiffies.h>
24 
25 #include <net/lib80211.h>
26 #include <linux/wireless.h>
27 
28 #include "libipw.h"
29 
30 static const char *libipw_modes[] = {
31 	"?", "a", "b", "ab", "g", "ag", "bg", "abg"
32 };
33 
34 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
35 {
36 	unsigned long end = jiffies;
37 
38 	if (end >= start)
39 		return jiffies_to_msecs(end - start);
40 
41 	return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
42 }
43 
44 #define MAX_CUSTOM_LEN 64
45 static char *libipw_translate_scan(struct libipw_device *ieee,
46 				      char *start, char *stop,
47 				      struct libipw_network *network,
48 				      struct iw_request_info *info)
49 {
50 	char custom[MAX_CUSTOM_LEN];
51 	char *p;
52 	struct iw_event iwe;
53 	int i, j;
54 	char *current_val;	/* For rates */
55 	u8 rate;
56 
57 	/* First entry *MUST* be the AP MAC address */
58 	iwe.cmd = SIOCGIWAP;
59 	iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
60 	memcpy(iwe.u.ap_addr.sa_data, network->bssid, ETH_ALEN);
61 	start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_ADDR_LEN);
62 
63 	/* Remaining entries will be displayed in the order we provide them */
64 
65 	/* Add the ESSID */
66 	iwe.cmd = SIOCGIWESSID;
67 	iwe.u.data.flags = 1;
68 	iwe.u.data.length = min(network->ssid_len, (u8) 32);
69 	start = iwe_stream_add_point(info, start, stop,
70 				     &iwe, network->ssid);
71 
72 	/* Add the protocol name */
73 	iwe.cmd = SIOCGIWNAME;
74 	snprintf(iwe.u.name, IFNAMSIZ, "IEEE 802.11%s",
75 		 libipw_modes[network->mode]);
76 	start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_CHAR_LEN);
77 
78 	/* Add mode */
79 	iwe.cmd = SIOCGIWMODE;
80 	if (network->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
81 		if (network->capability & WLAN_CAPABILITY_ESS)
82 			iwe.u.mode = IW_MODE_MASTER;
83 		else
84 			iwe.u.mode = IW_MODE_ADHOC;
85 
86 		start = iwe_stream_add_event(info, start, stop,
87 					     &iwe, IW_EV_UINT_LEN);
88 	}
89 
90 	/* Add channel and frequency */
91 	/* Note : userspace automatically computes channel using iwrange */
92 	iwe.cmd = SIOCGIWFREQ;
93 	iwe.u.freq.m = libipw_channel_to_freq(ieee, network->channel);
94 	iwe.u.freq.e = 6;
95 	iwe.u.freq.i = 0;
96 	start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_FREQ_LEN);
97 
98 	/* Add encryption capability */
99 	iwe.cmd = SIOCGIWENCODE;
100 	if (network->capability & WLAN_CAPABILITY_PRIVACY)
101 		iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
102 	else
103 		iwe.u.data.flags = IW_ENCODE_DISABLED;
104 	iwe.u.data.length = 0;
105 	start = iwe_stream_add_point(info, start, stop,
106 				     &iwe, network->ssid);
107 
108 	/* Add basic and extended rates */
109 	/* Rate : stuffing multiple values in a single event require a bit
110 	 * more of magic - Jean II */
111 	current_val = start + iwe_stream_lcp_len(info);
112 	iwe.cmd = SIOCGIWRATE;
113 	/* Those two flags are ignored... */
114 	iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
115 
116 	for (i = 0, j = 0; i < network->rates_len;) {
117 		if (j < network->rates_ex_len &&
118 		    ((network->rates_ex[j] & 0x7F) <
119 		     (network->rates[i] & 0x7F)))
120 			rate = network->rates_ex[j++] & 0x7F;
121 		else
122 			rate = network->rates[i++] & 0x7F;
123 		/* Bit rate given in 500 kb/s units (+ 0x80) */
124 		iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
125 		/* Add new value to event */
126 		current_val = iwe_stream_add_value(info, start, current_val,
127 						   stop, &iwe, IW_EV_PARAM_LEN);
128 	}
129 	for (; j < network->rates_ex_len; j++) {
130 		rate = network->rates_ex[j] & 0x7F;
131 		/* Bit rate given in 500 kb/s units (+ 0x80) */
132 		iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
133 		/* Add new value to event */
134 		current_val = iwe_stream_add_value(info, start, current_val,
135 						   stop, &iwe, IW_EV_PARAM_LEN);
136 	}
137 	/* Check if we added any rate */
138 	if ((current_val - start) > iwe_stream_lcp_len(info))
139 		start = current_val;
140 
141 	/* Add quality statistics */
142 	iwe.cmd = IWEVQUAL;
143 	iwe.u.qual.updated = IW_QUAL_QUAL_UPDATED | IW_QUAL_LEVEL_UPDATED |
144 	    IW_QUAL_NOISE_UPDATED;
145 
146 	if (!(network->stats.mask & LIBIPW_STATMASK_RSSI)) {
147 		iwe.u.qual.updated |= IW_QUAL_QUAL_INVALID |
148 		    IW_QUAL_LEVEL_INVALID;
149 		iwe.u.qual.qual = 0;
150 	} else {
151 		if (ieee->perfect_rssi == ieee->worst_rssi)
152 			iwe.u.qual.qual = 100;
153 		else
154 			iwe.u.qual.qual =
155 			    (100 *
156 			     (ieee->perfect_rssi - ieee->worst_rssi) *
157 			     (ieee->perfect_rssi - ieee->worst_rssi) -
158 			     (ieee->perfect_rssi - network->stats.rssi) *
159 			     (15 * (ieee->perfect_rssi - ieee->worst_rssi) +
160 			      62 * (ieee->perfect_rssi -
161 				    network->stats.rssi))) /
162 			    ((ieee->perfect_rssi -
163 			      ieee->worst_rssi) * (ieee->perfect_rssi -
164 						   ieee->worst_rssi));
165 		if (iwe.u.qual.qual > 100)
166 			iwe.u.qual.qual = 100;
167 		else if (iwe.u.qual.qual < 1)
168 			iwe.u.qual.qual = 0;
169 	}
170 
171 	if (!(network->stats.mask & LIBIPW_STATMASK_NOISE)) {
172 		iwe.u.qual.updated |= IW_QUAL_NOISE_INVALID;
173 		iwe.u.qual.noise = 0;
174 	} else {
175 		iwe.u.qual.noise = network->stats.noise;
176 	}
177 
178 	if (!(network->stats.mask & LIBIPW_STATMASK_SIGNAL)) {
179 		iwe.u.qual.updated |= IW_QUAL_LEVEL_INVALID;
180 		iwe.u.qual.level = 0;
181 	} else {
182 		iwe.u.qual.level = network->stats.signal;
183 	}
184 
185 	start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_QUAL_LEN);
186 
187 	iwe.cmd = IWEVCUSTOM;
188 	p = custom;
189 
190 	iwe.u.data.length = p - custom;
191 	if (iwe.u.data.length)
192 		start = iwe_stream_add_point(info, start, stop, &iwe, custom);
193 
194 	memset(&iwe, 0, sizeof(iwe));
195 	if (network->wpa_ie_len) {
196 		char buf[MAX_WPA_IE_LEN];
197 		memcpy(buf, network->wpa_ie, network->wpa_ie_len);
198 		iwe.cmd = IWEVGENIE;
199 		iwe.u.data.length = network->wpa_ie_len;
200 		start = iwe_stream_add_point(info, start, stop, &iwe, buf);
201 	}
202 
203 	memset(&iwe, 0, sizeof(iwe));
204 	if (network->rsn_ie_len) {
205 		char buf[MAX_WPA_IE_LEN];
206 		memcpy(buf, network->rsn_ie, network->rsn_ie_len);
207 		iwe.cmd = IWEVGENIE;
208 		iwe.u.data.length = network->rsn_ie_len;
209 		start = iwe_stream_add_point(info, start, stop, &iwe, buf);
210 	}
211 
212 	/* Add EXTRA: Age to display seconds since last beacon/probe response
213 	 * for given network. */
214 	iwe.cmd = IWEVCUSTOM;
215 	p = custom;
216 	p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom),
217 		      " Last beacon: %ums ago",
218 		      elapsed_jiffies_msecs(network->last_scanned));
219 	iwe.u.data.length = p - custom;
220 	if (iwe.u.data.length)
221 		start = iwe_stream_add_point(info, start, stop, &iwe, custom);
222 
223 	/* Add spectrum management information */
224 	iwe.cmd = -1;
225 	p = custom;
226 	p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), " Channel flags: ");
227 
228 	if (libipw_get_channel_flags(ieee, network->channel) &
229 	    LIBIPW_CH_INVALID) {
230 		iwe.cmd = IWEVCUSTOM;
231 		p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), "INVALID ");
232 	}
233 
234 	if (libipw_get_channel_flags(ieee, network->channel) &
235 	    LIBIPW_CH_RADAR_DETECT) {
236 		iwe.cmd = IWEVCUSTOM;
237 		p += scnprintf(p, MAX_CUSTOM_LEN - (p - custom), "DFS ");
238 	}
239 
240 	if (iwe.cmd == IWEVCUSTOM) {
241 		iwe.u.data.length = p - custom;
242 		start = iwe_stream_add_point(info, start, stop, &iwe, custom);
243 	}
244 
245 	return start;
246 }
247 
248 #define SCAN_ITEM_SIZE 128
249 
250 int libipw_wx_get_scan(struct libipw_device *ieee,
251 			  struct iw_request_info *info,
252 			  union iwreq_data *wrqu, char *extra)
253 {
254 	struct libipw_network *network;
255 	unsigned long flags;
256 	int err = 0;
257 
258 	char *ev = extra;
259 	char *stop = ev + wrqu->data.length;
260 	int i = 0;
261 
262 	LIBIPW_DEBUG_WX("Getting scan\n");
263 
264 	spin_lock_irqsave(&ieee->lock, flags);
265 
266 	list_for_each_entry(network, &ieee->network_list, list) {
267 		i++;
268 		if (stop - ev < SCAN_ITEM_SIZE) {
269 			err = -E2BIG;
270 			break;
271 		}
272 
273 		if (ieee->scan_age == 0 ||
274 		    time_after(network->last_scanned + ieee->scan_age, jiffies))
275 			ev = libipw_translate_scan(ieee, ev, stop, network,
276 						      info);
277 		else {
278 			LIBIPW_DEBUG_SCAN("Not showing network '%*pE (%pM)' due to age (%ums).\n",
279 					  network->ssid_len, network->ssid,
280 					  network->bssid,
281 					  elapsed_jiffies_msecs(
282 					               network->last_scanned));
283 		}
284 	}
285 
286 	spin_unlock_irqrestore(&ieee->lock, flags);
287 
288 	wrqu->data.length = ev - extra;
289 	wrqu->data.flags = 0;
290 
291 	LIBIPW_DEBUG_WX("exit: %d networks returned.\n", i);
292 
293 	return err;
294 }
295 
296 int libipw_wx_set_encode(struct libipw_device *ieee,
297 			    struct iw_request_info *info,
298 			    union iwreq_data *wrqu, char *keybuf)
299 {
300 	struct iw_point *erq = &(wrqu->encoding);
301 	struct net_device *dev = ieee->dev;
302 	struct libipw_security sec = {
303 		.flags = 0
304 	};
305 	int i, key, key_provided, len;
306 	struct lib80211_crypt_data **crypt;
307 	int host_crypto = ieee->host_encrypt || ieee->host_decrypt;
308 
309 	LIBIPW_DEBUG_WX("SET_ENCODE\n");
310 
311 	key = erq->flags & IW_ENCODE_INDEX;
312 	if (key) {
313 		if (key > WEP_KEYS)
314 			return -EINVAL;
315 		key--;
316 		key_provided = 1;
317 	} else {
318 		key_provided = 0;
319 		key = ieee->crypt_info.tx_keyidx;
320 	}
321 
322 	LIBIPW_DEBUG_WX("Key: %d [%s]\n", key, key_provided ?
323 			   "provided" : "default");
324 
325 	crypt = &ieee->crypt_info.crypt[key];
326 
327 	if (erq->flags & IW_ENCODE_DISABLED) {
328 		if (key_provided && *crypt) {
329 			LIBIPW_DEBUG_WX("Disabling encryption on key %d.\n",
330 					   key);
331 			lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
332 		} else
333 			LIBIPW_DEBUG_WX("Disabling encryption.\n");
334 
335 		/* Check all the keys to see if any are still configured,
336 		 * and if no key index was provided, de-init them all */
337 		for (i = 0; i < WEP_KEYS; i++) {
338 			if (ieee->crypt_info.crypt[i] != NULL) {
339 				if (key_provided)
340 					break;
341 				lib80211_crypt_delayed_deinit(&ieee->crypt_info,
342 							       &ieee->crypt_info.crypt[i]);
343 			}
344 		}
345 
346 		if (i == WEP_KEYS) {
347 			sec.enabled = 0;
348 			sec.encrypt = 0;
349 			sec.level = SEC_LEVEL_0;
350 			sec.flags |= SEC_ENABLED | SEC_LEVEL | SEC_ENCRYPT;
351 		}
352 
353 		goto done;
354 	}
355 
356 	sec.enabled = 1;
357 	sec.encrypt = 1;
358 	sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
359 
360 	if (*crypt != NULL && (*crypt)->ops != NULL &&
361 	    strcmp((*crypt)->ops->name, "WEP") != 0) {
362 		/* changing to use WEP; deinit previously used algorithm
363 		 * on this key */
364 		lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
365 	}
366 
367 	if (*crypt == NULL && host_crypto) {
368 		struct lib80211_crypt_data *new_crypt;
369 
370 		/* take WEP into use */
371 		new_crypt = kzalloc(sizeof(struct lib80211_crypt_data),
372 				    GFP_KERNEL);
373 		if (new_crypt == NULL)
374 			return -ENOMEM;
375 		new_crypt->ops = lib80211_get_crypto_ops("WEP");
376 		if (!new_crypt->ops) {
377 			request_module("lib80211_crypt_wep");
378 			new_crypt->ops = lib80211_get_crypto_ops("WEP");
379 		}
380 
381 		if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
382 			new_crypt->priv = new_crypt->ops->init(key);
383 
384 		if (!new_crypt->ops || !new_crypt->priv) {
385 			kfree(new_crypt);
386 			new_crypt = NULL;
387 
388 			printk(KERN_WARNING "%s: could not initialize WEP: "
389 			       "load module lib80211_crypt_wep\n", dev->name);
390 			return -EOPNOTSUPP;
391 		}
392 		*crypt = new_crypt;
393 	}
394 
395 	/* If a new key was provided, set it up */
396 	if (erq->length > 0) {
397 		len = erq->length <= 5 ? 5 : 13;
398 		memcpy(sec.keys[key], keybuf, erq->length);
399 		if (len > erq->length)
400 			memset(sec.keys[key] + erq->length, 0,
401 			       len - erq->length);
402 		LIBIPW_DEBUG_WX("Setting key %d to '%*pE' (%d:%d bytes)\n",
403 				   key, len, sec.keys[key],
404 				   erq->length, len);
405 		sec.key_sizes[key] = len;
406 		if (*crypt)
407 			(*crypt)->ops->set_key(sec.keys[key], len, NULL,
408 					       (*crypt)->priv);
409 		sec.flags |= (1 << key);
410 		/* This ensures a key will be activated if no key is
411 		 * explicitly set */
412 		if (key == sec.active_key)
413 			sec.flags |= SEC_ACTIVE_KEY;
414 
415 	} else {
416 		if (host_crypto) {
417 			len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
418 						     NULL, (*crypt)->priv);
419 			if (len == 0) {
420 				/* Set a default key of all 0 */
421 				LIBIPW_DEBUG_WX("Setting key %d to all "
422 						   "zero.\n", key);
423 				memset(sec.keys[key], 0, 13);
424 				(*crypt)->ops->set_key(sec.keys[key], 13, NULL,
425 						       (*crypt)->priv);
426 				sec.key_sizes[key] = 13;
427 				sec.flags |= (1 << key);
428 			}
429 		}
430 		/* No key data - just set the default TX key index */
431 		if (key_provided) {
432 			LIBIPW_DEBUG_WX("Setting key %d to default Tx "
433 					   "key.\n", key);
434 			ieee->crypt_info.tx_keyidx = key;
435 			sec.active_key = key;
436 			sec.flags |= SEC_ACTIVE_KEY;
437 		}
438 	}
439 	if (erq->flags & (IW_ENCODE_OPEN | IW_ENCODE_RESTRICTED)) {
440 		ieee->open_wep = !(erq->flags & IW_ENCODE_RESTRICTED);
441 		sec.auth_mode = ieee->open_wep ? WLAN_AUTH_OPEN :
442 		    WLAN_AUTH_SHARED_KEY;
443 		sec.flags |= SEC_AUTH_MODE;
444 		LIBIPW_DEBUG_WX("Auth: %s\n",
445 				   sec.auth_mode == WLAN_AUTH_OPEN ?
446 				   "OPEN" : "SHARED KEY");
447 	}
448 
449 	/* For now we just support WEP, so only set that security level...
450 	 * TODO: When WPA is added this is one place that needs to change */
451 	sec.flags |= SEC_LEVEL;
452 	sec.level = SEC_LEVEL_1;	/* 40 and 104 bit WEP */
453 	sec.encode_alg[key] = SEC_ALG_WEP;
454 
455       done:
456 	if (ieee->set_security)
457 		ieee->set_security(dev, &sec);
458 
459 	return 0;
460 }
461 
462 int libipw_wx_get_encode(struct libipw_device *ieee,
463 			    struct iw_request_info *info,
464 			    union iwreq_data *wrqu, char *keybuf)
465 {
466 	struct iw_point *erq = &(wrqu->encoding);
467 	int len, key;
468 	struct libipw_security *sec = &ieee->sec;
469 
470 	LIBIPW_DEBUG_WX("GET_ENCODE\n");
471 
472 	key = erq->flags & IW_ENCODE_INDEX;
473 	if (key) {
474 		if (key > WEP_KEYS)
475 			return -EINVAL;
476 		key--;
477 	} else
478 		key = ieee->crypt_info.tx_keyidx;
479 
480 	erq->flags = key + 1;
481 
482 	if (!sec->enabled) {
483 		erq->length = 0;
484 		erq->flags |= IW_ENCODE_DISABLED;
485 		return 0;
486 	}
487 
488 	len = sec->key_sizes[key];
489 	memcpy(keybuf, sec->keys[key], len);
490 
491 	erq->length = len;
492 	erq->flags |= IW_ENCODE_ENABLED;
493 
494 	if (ieee->open_wep)
495 		erq->flags |= IW_ENCODE_OPEN;
496 	else
497 		erq->flags |= IW_ENCODE_RESTRICTED;
498 
499 	return 0;
500 }
501 
502 int libipw_wx_set_encodeext(struct libipw_device *ieee,
503 			       struct iw_request_info *info,
504 			       union iwreq_data *wrqu, char *extra)
505 {
506 	struct net_device *dev = ieee->dev;
507 	struct iw_point *encoding = &wrqu->encoding;
508 	struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
509 	int i, idx, ret = 0;
510 	int group_key = 0;
511 	const char *alg, *module;
512 	struct lib80211_crypto_ops *ops;
513 	struct lib80211_crypt_data **crypt;
514 
515 	struct libipw_security sec = {
516 		.flags = 0,
517 	};
518 
519 	idx = encoding->flags & IW_ENCODE_INDEX;
520 	if (idx) {
521 		if (idx < 1 || idx > WEP_KEYS)
522 			return -EINVAL;
523 		idx--;
524 	} else
525 		idx = ieee->crypt_info.tx_keyidx;
526 
527 	if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) {
528 		crypt = &ieee->crypt_info.crypt[idx];
529 		group_key = 1;
530 	} else {
531 		/* some Cisco APs use idx>0 for unicast in dynamic WEP */
532 		if (idx != 0 && ext->alg != IW_ENCODE_ALG_WEP)
533 			return -EINVAL;
534 		if (ieee->iw_mode == IW_MODE_INFRA)
535 			crypt = &ieee->crypt_info.crypt[idx];
536 		else
537 			return -EINVAL;
538 	}
539 
540 	sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
541 	if ((encoding->flags & IW_ENCODE_DISABLED) ||
542 	    ext->alg == IW_ENCODE_ALG_NONE) {
543 		if (*crypt)
544 			lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
545 
546 		for (i = 0; i < WEP_KEYS; i++)
547 			if (ieee->crypt_info.crypt[i] != NULL)
548 				break;
549 
550 		if (i == WEP_KEYS) {
551 			sec.enabled = 0;
552 			sec.encrypt = 0;
553 			sec.level = SEC_LEVEL_0;
554 			sec.flags |= SEC_LEVEL;
555 		}
556 		goto done;
557 	}
558 
559 	sec.enabled = 1;
560 	sec.encrypt = 1;
561 
562 	if (group_key ? !ieee->host_mc_decrypt :
563 	    !(ieee->host_encrypt || ieee->host_decrypt ||
564 	      ieee->host_encrypt_msdu))
565 		goto skip_host_crypt;
566 
567 	switch (ext->alg) {
568 	case IW_ENCODE_ALG_WEP:
569 		alg = "WEP";
570 		module = "lib80211_crypt_wep";
571 		break;
572 	case IW_ENCODE_ALG_TKIP:
573 		alg = "TKIP";
574 		module = "lib80211_crypt_tkip";
575 		break;
576 	case IW_ENCODE_ALG_CCMP:
577 		alg = "CCMP";
578 		module = "lib80211_crypt_ccmp";
579 		break;
580 	default:
581 		LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
582 				   dev->name, ext->alg);
583 		ret = -EINVAL;
584 		goto done;
585 	}
586 
587 	ops = lib80211_get_crypto_ops(alg);
588 	if (ops == NULL) {
589 		request_module(module);
590 		ops = lib80211_get_crypto_ops(alg);
591 	}
592 	if (ops == NULL) {
593 		LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
594 				   dev->name, ext->alg);
595 		ret = -EINVAL;
596 		goto done;
597 	}
598 
599 	if (*crypt == NULL || (*crypt)->ops != ops) {
600 		struct lib80211_crypt_data *new_crypt;
601 
602 		lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
603 
604 		new_crypt = kzalloc(sizeof(*new_crypt), GFP_KERNEL);
605 		if (new_crypt == NULL) {
606 			ret = -ENOMEM;
607 			goto done;
608 		}
609 		new_crypt->ops = ops;
610 		if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
611 			new_crypt->priv = new_crypt->ops->init(idx);
612 		if (new_crypt->priv == NULL) {
613 			kfree(new_crypt);
614 			ret = -EINVAL;
615 			goto done;
616 		}
617 		*crypt = new_crypt;
618 	}
619 
620 	if (ext->key_len > 0 && (*crypt)->ops->set_key &&
621 	    (*crypt)->ops->set_key(ext->key, ext->key_len, ext->rx_seq,
622 				   (*crypt)->priv) < 0) {
623 		LIBIPW_DEBUG_WX("%s: key setting failed\n", dev->name);
624 		ret = -EINVAL;
625 		goto done;
626 	}
627 
628       skip_host_crypt:
629 	if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
630 		ieee->crypt_info.tx_keyidx = idx;
631 		sec.active_key = idx;
632 		sec.flags |= SEC_ACTIVE_KEY;
633 	}
634 
635 	if (ext->alg != IW_ENCODE_ALG_NONE) {
636 		memcpy(sec.keys[idx], ext->key, ext->key_len);
637 		sec.key_sizes[idx] = ext->key_len;
638 		sec.flags |= (1 << idx);
639 		if (ext->alg == IW_ENCODE_ALG_WEP) {
640 			sec.encode_alg[idx] = SEC_ALG_WEP;
641 			sec.flags |= SEC_LEVEL;
642 			sec.level = SEC_LEVEL_1;
643 		} else if (ext->alg == IW_ENCODE_ALG_TKIP) {
644 			sec.encode_alg[idx] = SEC_ALG_TKIP;
645 			sec.flags |= SEC_LEVEL;
646 			sec.level = SEC_LEVEL_2;
647 		} else if (ext->alg == IW_ENCODE_ALG_CCMP) {
648 			sec.encode_alg[idx] = SEC_ALG_CCMP;
649 			sec.flags |= SEC_LEVEL;
650 			sec.level = SEC_LEVEL_3;
651 		}
652 		/* Don't set sec level for group keys. */
653 		if (group_key)
654 			sec.flags &= ~SEC_LEVEL;
655 	}
656       done:
657 	if (ieee->set_security)
658 		ieee->set_security(dev, &sec);
659 
660 	return ret;
661 }
662 
663 int libipw_wx_get_encodeext(struct libipw_device *ieee,
664 			       struct iw_request_info *info,
665 			       union iwreq_data *wrqu, char *extra)
666 {
667 	struct iw_point *encoding = &wrqu->encoding;
668 	struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
669 	struct libipw_security *sec = &ieee->sec;
670 	int idx, max_key_len;
671 
672 	max_key_len = encoding->length - sizeof(*ext);
673 	if (max_key_len < 0)
674 		return -EINVAL;
675 
676 	idx = encoding->flags & IW_ENCODE_INDEX;
677 	if (idx) {
678 		if (idx < 1 || idx > WEP_KEYS)
679 			return -EINVAL;
680 		idx--;
681 	} else
682 		idx = ieee->crypt_info.tx_keyidx;
683 
684 	if (!(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) &&
685 	    ext->alg != IW_ENCODE_ALG_WEP)
686 		if (idx != 0 || ieee->iw_mode != IW_MODE_INFRA)
687 			return -EINVAL;
688 
689 	encoding->flags = idx + 1;
690 	memset(ext, 0, sizeof(*ext));
691 
692 	if (!sec->enabled) {
693 		ext->alg = IW_ENCODE_ALG_NONE;
694 		ext->key_len = 0;
695 		encoding->flags |= IW_ENCODE_DISABLED;
696 	} else {
697 		if (sec->encode_alg[idx] == SEC_ALG_WEP)
698 			ext->alg = IW_ENCODE_ALG_WEP;
699 		else if (sec->encode_alg[idx] == SEC_ALG_TKIP)
700 			ext->alg = IW_ENCODE_ALG_TKIP;
701 		else if (sec->encode_alg[idx] == SEC_ALG_CCMP)
702 			ext->alg = IW_ENCODE_ALG_CCMP;
703 		else
704 			return -EINVAL;
705 
706 		ext->key_len = sec->key_sizes[idx];
707 		memcpy(ext->key, sec->keys[idx], ext->key_len);
708 		encoding->flags |= IW_ENCODE_ENABLED;
709 		if (ext->key_len &&
710 		    (ext->alg == IW_ENCODE_ALG_TKIP ||
711 		     ext->alg == IW_ENCODE_ALG_CCMP))
712 			ext->ext_flags |= IW_ENCODE_EXT_TX_SEQ_VALID;
713 
714 	}
715 
716 	return 0;
717 }
718 
719 EXPORT_SYMBOL(libipw_wx_set_encodeext);
720 EXPORT_SYMBOL(libipw_wx_get_encodeext);
721 
722 EXPORT_SYMBOL(libipw_wx_get_scan);
723 EXPORT_SYMBOL(libipw_wx_set_encode);
724 EXPORT_SYMBOL(libipw_wx_get_encode);
725