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33#include <linux/kmod.h>
34#include <linux/slab.h>
35#include <linux/module.h>
36#include <linux/jiffies.h>
37
38#include <net/lib80211.h>
39#include <linux/wireless.h>
40
41#include "libipw.h"
42
43static const char *libipw_modes[] = {
44 "?", "a", "b", "ab", "g", "ag", "bg", "abg"
45};
46
47static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
48{
49 unsigned long end = jiffies;
50
51 if (end >= start)
52 return jiffies_to_msecs(end - start);
53
54 return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
55}
56
57#define MAX_CUSTOM_LEN 64
58static char *libipw_translate_scan(struct libipw_device *ieee,
59 char *start, char *stop,
60 struct libipw_network *network,
61 struct iw_request_info *info)
62{
63 char custom[MAX_CUSTOM_LEN];
64 char *p;
65 struct iw_event iwe;
66 int i, j;
67 char *current_val;
68 u8 rate;
69
70
71 iwe.cmd = SIOCGIWAP;
72 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
73 memcpy(iwe.u.ap_addr.sa_data, network->bssid, ETH_ALEN);
74 start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_ADDR_LEN);
75
76
77
78
79 iwe.cmd = SIOCGIWESSID;
80 iwe.u.data.flags = 1;
81 iwe.u.data.length = min(network->ssid_len, (u8) 32);
82 start = iwe_stream_add_point(info, start, stop,
83 &iwe, network->ssid);
84
85
86 iwe.cmd = SIOCGIWNAME;
87 snprintf(iwe.u.name, IFNAMSIZ, "IEEE 802.11%s",
88 libipw_modes[network->mode]);
89 start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_CHAR_LEN);
90
91
92 iwe.cmd = SIOCGIWMODE;
93 if (network->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
94 if (network->capability & WLAN_CAPABILITY_ESS)
95 iwe.u.mode = IW_MODE_MASTER;
96 else
97 iwe.u.mode = IW_MODE_ADHOC;
98
99 start = iwe_stream_add_event(info, start, stop,
100 &iwe, IW_EV_UINT_LEN);
101 }
102
103
104
105 iwe.cmd = SIOCGIWFREQ;
106 iwe.u.freq.m = libipw_channel_to_freq(ieee, network->channel);
107 iwe.u.freq.e = 6;
108 iwe.u.freq.i = 0;
109 start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_FREQ_LEN);
110
111
112 iwe.cmd = SIOCGIWENCODE;
113 if (network->capability & WLAN_CAPABILITY_PRIVACY)
114 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
115 else
116 iwe.u.data.flags = IW_ENCODE_DISABLED;
117 iwe.u.data.length = 0;
118 start = iwe_stream_add_point(info, start, stop,
119 &iwe, network->ssid);
120
121
122
123
124 current_val = start + iwe_stream_lcp_len(info);
125 iwe.cmd = SIOCGIWRATE;
126
127 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
128
129 for (i = 0, j = 0; i < network->rates_len;) {
130 if (j < network->rates_ex_len &&
131 ((network->rates_ex[j] & 0x7F) <
132 (network->rates[i] & 0x7F)))
133 rate = network->rates_ex[j++] & 0x7F;
134 else
135 rate = network->rates[i++] & 0x7F;
136
137 iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
138
139 current_val = iwe_stream_add_value(info, start, current_val,
140 stop, &iwe, IW_EV_PARAM_LEN);
141 }
142 for (; j < network->rates_ex_len; j++) {
143 rate = network->rates_ex[j] & 0x7F;
144
145 iwe.u.bitrate.value = ((rate & 0x7f) * 500000);
146
147 current_val = iwe_stream_add_value(info, start, current_val,
148 stop, &iwe, IW_EV_PARAM_LEN);
149 }
150
151 if ((current_val - start) > iwe_stream_lcp_len(info))
152 start = current_val;
153
154
155 iwe.cmd = IWEVQUAL;
156 iwe.u.qual.updated = IW_QUAL_QUAL_UPDATED | IW_QUAL_LEVEL_UPDATED |
157 IW_QUAL_NOISE_UPDATED;
158
159 if (!(network->stats.mask & LIBIPW_STATMASK_RSSI)) {
160 iwe.u.qual.updated |= IW_QUAL_QUAL_INVALID |
161 IW_QUAL_LEVEL_INVALID;
162 iwe.u.qual.qual = 0;
163 } else {
164 if (ieee->perfect_rssi == ieee->worst_rssi)
165 iwe.u.qual.qual = 100;
166 else
167 iwe.u.qual.qual =
168 (100 *
169 (ieee->perfect_rssi - ieee->worst_rssi) *
170 (ieee->perfect_rssi - ieee->worst_rssi) -
171 (ieee->perfect_rssi - network->stats.rssi) *
172 (15 * (ieee->perfect_rssi - ieee->worst_rssi) +
173 62 * (ieee->perfect_rssi -
174 network->stats.rssi))) /
175 ((ieee->perfect_rssi -
176 ieee->worst_rssi) * (ieee->perfect_rssi -
177 ieee->worst_rssi));
178 if (iwe.u.qual.qual > 100)
179 iwe.u.qual.qual = 100;
180 else if (iwe.u.qual.qual < 1)
181 iwe.u.qual.qual = 0;
182 }
183
184 if (!(network->stats.mask & LIBIPW_STATMASK_NOISE)) {
185 iwe.u.qual.updated |= IW_QUAL_NOISE_INVALID;
186 iwe.u.qual.noise = 0;
187 } else {
188 iwe.u.qual.noise = network->stats.noise;
189 }
190
191 if (!(network->stats.mask & LIBIPW_STATMASK_SIGNAL)) {
192 iwe.u.qual.updated |= IW_QUAL_LEVEL_INVALID;
193 iwe.u.qual.level = 0;
194 } else {
195 iwe.u.qual.level = network->stats.signal;
196 }
197
198 start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_QUAL_LEN);
199
200 iwe.cmd = IWEVCUSTOM;
201 p = custom;
202
203 iwe.u.data.length = p - custom;
204 if (iwe.u.data.length)
205 start = iwe_stream_add_point(info, start, stop, &iwe, custom);
206
207 memset(&iwe, 0, sizeof(iwe));
208 if (network->wpa_ie_len) {
209 char buf[MAX_WPA_IE_LEN];
210 memcpy(buf, network->wpa_ie, network->wpa_ie_len);
211 iwe.cmd = IWEVGENIE;
212 iwe.u.data.length = network->wpa_ie_len;
213 start = iwe_stream_add_point(info, start, stop, &iwe, buf);
214 }
215
216 memset(&iwe, 0, sizeof(iwe));
217 if (network->rsn_ie_len) {
218 char buf[MAX_WPA_IE_LEN];
219 memcpy(buf, network->rsn_ie, network->rsn_ie_len);
220 iwe.cmd = IWEVGENIE;
221 iwe.u.data.length = network->rsn_ie_len;
222 start = iwe_stream_add_point(info, start, stop, &iwe, buf);
223 }
224
225
226
227 iwe.cmd = IWEVCUSTOM;
228 p = custom;
229 p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
230 " Last beacon: %ums ago",
231 elapsed_jiffies_msecs(network->last_scanned));
232 iwe.u.data.length = p - custom;
233 if (iwe.u.data.length)
234 start = iwe_stream_add_point(info, start, stop, &iwe, custom);
235
236
237 iwe.cmd = -1;
238 p = custom;
239 p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), " Channel flags: ");
240
241 if (libipw_get_channel_flags(ieee, network->channel) &
242 LIBIPW_CH_INVALID) {
243 iwe.cmd = IWEVCUSTOM;
244 p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), "INVALID ");
245 }
246
247 if (libipw_get_channel_flags(ieee, network->channel) &
248 LIBIPW_CH_RADAR_DETECT) {
249 iwe.cmd = IWEVCUSTOM;
250 p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), "DFS ");
251 }
252
253 if (iwe.cmd == IWEVCUSTOM) {
254 iwe.u.data.length = p - custom;
255 start = iwe_stream_add_point(info, start, stop, &iwe, custom);
256 }
257
258 return start;
259}
260
261#define SCAN_ITEM_SIZE 128
262
263int libipw_wx_get_scan(struct libipw_device *ieee,
264 struct iw_request_info *info,
265 union iwreq_data *wrqu, char *extra)
266{
267 struct libipw_network *network;
268 unsigned long flags;
269 int err = 0;
270
271 char *ev = extra;
272 char *stop = ev + wrqu->data.length;
273 int i = 0;
274 DECLARE_SSID_BUF(ssid);
275
276 LIBIPW_DEBUG_WX("Getting scan\n");
277
278 spin_lock_irqsave(&ieee->lock, flags);
279
280 list_for_each_entry(network, &ieee->network_list, list) {
281 i++;
282 if (stop - ev < SCAN_ITEM_SIZE) {
283 err = -E2BIG;
284 break;
285 }
286
287 if (ieee->scan_age == 0 ||
288 time_after(network->last_scanned + ieee->scan_age, jiffies))
289 ev = libipw_translate_scan(ieee, ev, stop, network,
290 info);
291 else {
292 LIBIPW_DEBUG_SCAN("Not showing network '%s ("
293 "%pM)' due to age (%ums).\n",
294 print_ssid(ssid, network->ssid,
295 network->ssid_len),
296 network->bssid,
297 elapsed_jiffies_msecs(
298 network->last_scanned));
299 }
300 }
301
302 spin_unlock_irqrestore(&ieee->lock, flags);
303
304 wrqu->data.length = ev - extra;
305 wrqu->data.flags = 0;
306
307 LIBIPW_DEBUG_WX("exit: %d networks returned.\n", i);
308
309 return err;
310}
311
312int libipw_wx_set_encode(struct libipw_device *ieee,
313 struct iw_request_info *info,
314 union iwreq_data *wrqu, char *keybuf)
315{
316 struct iw_point *erq = &(wrqu->encoding);
317 struct net_device *dev = ieee->dev;
318 struct libipw_security sec = {
319 .flags = 0
320 };
321 int i, key, key_provided, len;
322 struct lib80211_crypt_data **crypt;
323 int host_crypto = ieee->host_encrypt || ieee->host_decrypt;
324 DECLARE_SSID_BUF(ssid);
325
326 LIBIPW_DEBUG_WX("SET_ENCODE\n");
327
328 key = erq->flags & IW_ENCODE_INDEX;
329 if (key) {
330 if (key > WEP_KEYS)
331 return -EINVAL;
332 key--;
333 key_provided = 1;
334 } else {
335 key_provided = 0;
336 key = ieee->crypt_info.tx_keyidx;
337 }
338
339 LIBIPW_DEBUG_WX("Key: %d [%s]\n", key, key_provided ?
340 "provided" : "default");
341
342 crypt = &ieee->crypt_info.crypt[key];
343
344 if (erq->flags & IW_ENCODE_DISABLED) {
345 if (key_provided && *crypt) {
346 LIBIPW_DEBUG_WX("Disabling encryption on key %d.\n",
347 key);
348 lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
349 } else
350 LIBIPW_DEBUG_WX("Disabling encryption.\n");
351
352
353
354 for (i = 0; i < WEP_KEYS; i++) {
355 if (ieee->crypt_info.crypt[i] != NULL) {
356 if (key_provided)
357 break;
358 lib80211_crypt_delayed_deinit(&ieee->crypt_info,
359 &ieee->crypt_info.crypt[i]);
360 }
361 }
362
363 if (i == WEP_KEYS) {
364 sec.enabled = 0;
365 sec.encrypt = 0;
366 sec.level = SEC_LEVEL_0;
367 sec.flags |= SEC_ENABLED | SEC_LEVEL | SEC_ENCRYPT;
368 }
369
370 goto done;
371 }
372
373 sec.enabled = 1;
374 sec.encrypt = 1;
375 sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
376
377 if (*crypt != NULL && (*crypt)->ops != NULL &&
378 strcmp((*crypt)->ops->name, "WEP") != 0) {
379
380
381 lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
382 }
383
384 if (*crypt == NULL && host_crypto) {
385 struct lib80211_crypt_data *new_crypt;
386
387
388 new_crypt = kzalloc(sizeof(struct lib80211_crypt_data),
389 GFP_KERNEL);
390 if (new_crypt == NULL)
391 return -ENOMEM;
392 new_crypt->ops = lib80211_get_crypto_ops("WEP");
393 if (!new_crypt->ops) {
394 request_module("lib80211_crypt_wep");
395 new_crypt->ops = lib80211_get_crypto_ops("WEP");
396 }
397
398 if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
399 new_crypt->priv = new_crypt->ops->init(key);
400
401 if (!new_crypt->ops || !new_crypt->priv) {
402 kfree(new_crypt);
403 new_crypt = NULL;
404
405 printk(KERN_WARNING "%s: could not initialize WEP: "
406 "load module lib80211_crypt_wep\n", dev->name);
407 return -EOPNOTSUPP;
408 }
409 *crypt = new_crypt;
410 }
411
412
413 if (erq->length > 0) {
414 len = erq->length <= 5 ? 5 : 13;
415 memcpy(sec.keys[key], keybuf, erq->length);
416 if (len > erq->length)
417 memset(sec.keys[key] + erq->length, 0,
418 len - erq->length);
419 LIBIPW_DEBUG_WX("Setting key %d to '%s' (%d:%d bytes)\n",
420 key, print_ssid(ssid, sec.keys[key], len),
421 erq->length, len);
422 sec.key_sizes[key] = len;
423 if (*crypt)
424 (*crypt)->ops->set_key(sec.keys[key], len, NULL,
425 (*crypt)->priv);
426 sec.flags |= (1 << key);
427
428
429 if (key == sec.active_key)
430 sec.flags |= SEC_ACTIVE_KEY;
431
432 } else {
433 if (host_crypto) {
434 len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
435 NULL, (*crypt)->priv);
436 if (len == 0) {
437
438 LIBIPW_DEBUG_WX("Setting key %d to all "
439 "zero.\n", key);
440 memset(sec.keys[key], 0, 13);
441 (*crypt)->ops->set_key(sec.keys[key], 13, NULL,
442 (*crypt)->priv);
443 sec.key_sizes[key] = 13;
444 sec.flags |= (1 << key);
445 }
446 }
447
448 if (key_provided) {
449 LIBIPW_DEBUG_WX("Setting key %d to default Tx "
450 "key.\n", key);
451 ieee->crypt_info.tx_keyidx = key;
452 sec.active_key = key;
453 sec.flags |= SEC_ACTIVE_KEY;
454 }
455 }
456 if (erq->flags & (IW_ENCODE_OPEN | IW_ENCODE_RESTRICTED)) {
457 ieee->open_wep = !(erq->flags & IW_ENCODE_RESTRICTED);
458 sec.auth_mode = ieee->open_wep ? WLAN_AUTH_OPEN :
459 WLAN_AUTH_SHARED_KEY;
460 sec.flags |= SEC_AUTH_MODE;
461 LIBIPW_DEBUG_WX("Auth: %s\n",
462 sec.auth_mode == WLAN_AUTH_OPEN ?
463 "OPEN" : "SHARED KEY");
464 }
465
466
467
468 sec.flags |= SEC_LEVEL;
469 sec.level = SEC_LEVEL_1;
470 sec.encode_alg[key] = SEC_ALG_WEP;
471
472 done:
473 if (ieee->set_security)
474 ieee->set_security(dev, &sec);
475
476
477
478
479
480
481 if (ieee->reset_on_keychange &&
482 ieee->iw_mode != IW_MODE_INFRA &&
483 ieee->reset_port && ieee->reset_port(dev)) {
484 printk(KERN_DEBUG "%s: reset_port failed\n", dev->name);
485 return -EINVAL;
486 }
487 return 0;
488}
489
490int libipw_wx_get_encode(struct libipw_device *ieee,
491 struct iw_request_info *info,
492 union iwreq_data *wrqu, char *keybuf)
493{
494 struct iw_point *erq = &(wrqu->encoding);
495 int len, key;
496 struct lib80211_crypt_data *crypt;
497 struct libipw_security *sec = &ieee->sec;
498
499 LIBIPW_DEBUG_WX("GET_ENCODE\n");
500
501 key = erq->flags & IW_ENCODE_INDEX;
502 if (key) {
503 if (key > WEP_KEYS)
504 return -EINVAL;
505 key--;
506 } else
507 key = ieee->crypt_info.tx_keyidx;
508
509 crypt = ieee->crypt_info.crypt[key];
510 erq->flags = key + 1;
511
512 if (!sec->enabled) {
513 erq->length = 0;
514 erq->flags |= IW_ENCODE_DISABLED;
515 return 0;
516 }
517
518 len = sec->key_sizes[key];
519 memcpy(keybuf, sec->keys[key], len);
520
521 erq->length = len;
522 erq->flags |= IW_ENCODE_ENABLED;
523
524 if (ieee->open_wep)
525 erq->flags |= IW_ENCODE_OPEN;
526 else
527 erq->flags |= IW_ENCODE_RESTRICTED;
528
529 return 0;
530}
531
532int libipw_wx_set_encodeext(struct libipw_device *ieee,
533 struct iw_request_info *info,
534 union iwreq_data *wrqu, char *extra)
535{
536 struct net_device *dev = ieee->dev;
537 struct iw_point *encoding = &wrqu->encoding;
538 struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
539 int i, idx, ret = 0;
540 int group_key = 0;
541 const char *alg, *module;
542 struct lib80211_crypto_ops *ops;
543 struct lib80211_crypt_data **crypt;
544
545 struct libipw_security sec = {
546 .flags = 0,
547 };
548
549 idx = encoding->flags & IW_ENCODE_INDEX;
550 if (idx) {
551 if (idx < 1 || idx > WEP_KEYS)
552 return -EINVAL;
553 idx--;
554 } else
555 idx = ieee->crypt_info.tx_keyidx;
556
557 if (ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) {
558 crypt = &ieee->crypt_info.crypt[idx];
559 group_key = 1;
560 } else {
561
562 if (idx != 0 && ext->alg != IW_ENCODE_ALG_WEP)
563 return -EINVAL;
564 if (ieee->iw_mode == IW_MODE_INFRA)
565 crypt = &ieee->crypt_info.crypt[idx];
566 else
567 return -EINVAL;
568 }
569
570 sec.flags |= SEC_ENABLED | SEC_ENCRYPT;
571 if ((encoding->flags & IW_ENCODE_DISABLED) ||
572 ext->alg == IW_ENCODE_ALG_NONE) {
573 if (*crypt)
574 lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
575
576 for (i = 0; i < WEP_KEYS; i++)
577 if (ieee->crypt_info.crypt[i] != NULL)
578 break;
579
580 if (i == WEP_KEYS) {
581 sec.enabled = 0;
582 sec.encrypt = 0;
583 sec.level = SEC_LEVEL_0;
584 sec.flags |= SEC_LEVEL;
585 }
586 goto done;
587 }
588
589 sec.enabled = 1;
590 sec.encrypt = 1;
591
592 if (group_key ? !ieee->host_mc_decrypt :
593 !(ieee->host_encrypt || ieee->host_decrypt ||
594 ieee->host_encrypt_msdu))
595 goto skip_host_crypt;
596
597 switch (ext->alg) {
598 case IW_ENCODE_ALG_WEP:
599 alg = "WEP";
600 module = "lib80211_crypt_wep";
601 break;
602 case IW_ENCODE_ALG_TKIP:
603 alg = "TKIP";
604 module = "lib80211_crypt_tkip";
605 break;
606 case IW_ENCODE_ALG_CCMP:
607 alg = "CCMP";
608 module = "lib80211_crypt_ccmp";
609 break;
610 default:
611 LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
612 dev->name, ext->alg);
613 ret = -EINVAL;
614 goto done;
615 }
616
617 ops = lib80211_get_crypto_ops(alg);
618 if (ops == NULL) {
619 request_module(module);
620 ops = lib80211_get_crypto_ops(alg);
621 }
622 if (ops == NULL) {
623 LIBIPW_DEBUG_WX("%s: unknown crypto alg %d\n",
624 dev->name, ext->alg);
625 ret = -EINVAL;
626 goto done;
627 }
628
629 if (*crypt == NULL || (*crypt)->ops != ops) {
630 struct lib80211_crypt_data *new_crypt;
631
632 lib80211_crypt_delayed_deinit(&ieee->crypt_info, crypt);
633
634 new_crypt = kzalloc(sizeof(*new_crypt), GFP_KERNEL);
635 if (new_crypt == NULL) {
636 ret = -ENOMEM;
637 goto done;
638 }
639 new_crypt->ops = ops;
640 if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
641 new_crypt->priv = new_crypt->ops->init(idx);
642 if (new_crypt->priv == NULL) {
643 kfree(new_crypt);
644 ret = -EINVAL;
645 goto done;
646 }
647 *crypt = new_crypt;
648 }
649
650 if (ext->key_len > 0 && (*crypt)->ops->set_key &&
651 (*crypt)->ops->set_key(ext->key, ext->key_len, ext->rx_seq,
652 (*crypt)->priv) < 0) {
653 LIBIPW_DEBUG_WX("%s: key setting failed\n", dev->name);
654 ret = -EINVAL;
655 goto done;
656 }
657
658 skip_host_crypt:
659 if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
660 ieee->crypt_info.tx_keyidx = idx;
661 sec.active_key = idx;
662 sec.flags |= SEC_ACTIVE_KEY;
663 }
664
665 if (ext->alg != IW_ENCODE_ALG_NONE) {
666 memcpy(sec.keys[idx], ext->key, ext->key_len);
667 sec.key_sizes[idx] = ext->key_len;
668 sec.flags |= (1 << idx);
669 if (ext->alg == IW_ENCODE_ALG_WEP) {
670 sec.encode_alg[idx] = SEC_ALG_WEP;
671 sec.flags |= SEC_LEVEL;
672 sec.level = SEC_LEVEL_1;
673 } else if (ext->alg == IW_ENCODE_ALG_TKIP) {
674 sec.encode_alg[idx] = SEC_ALG_TKIP;
675 sec.flags |= SEC_LEVEL;
676 sec.level = SEC_LEVEL_2;
677 } else if (ext->alg == IW_ENCODE_ALG_CCMP) {
678 sec.encode_alg[idx] = SEC_ALG_CCMP;
679 sec.flags |= SEC_LEVEL;
680 sec.level = SEC_LEVEL_3;
681 }
682
683 if (group_key)
684 sec.flags &= ~SEC_LEVEL;
685 }
686 done:
687 if (ieee->set_security)
688 ieee->set_security(ieee->dev, &sec);
689
690
691
692
693
694
695
696
697 if (ieee->reset_on_keychange &&
698 ieee->iw_mode != IW_MODE_INFRA &&
699 ieee->reset_port && ieee->reset_port(dev)) {
700 LIBIPW_DEBUG_WX("%s: reset_port failed\n", dev->name);
701 return -EINVAL;
702 }
703
704 return ret;
705}
706
707int libipw_wx_get_encodeext(struct libipw_device *ieee,
708 struct iw_request_info *info,
709 union iwreq_data *wrqu, char *extra)
710{
711 struct iw_point *encoding = &wrqu->encoding;
712 struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
713 struct libipw_security *sec = &ieee->sec;
714 int idx, max_key_len;
715
716 max_key_len = encoding->length - sizeof(*ext);
717 if (max_key_len < 0)
718 return -EINVAL;
719
720 idx = encoding->flags & IW_ENCODE_INDEX;
721 if (idx) {
722 if (idx < 1 || idx > WEP_KEYS)
723 return -EINVAL;
724 idx--;
725 } else
726 idx = ieee->crypt_info.tx_keyidx;
727
728 if (!(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY) &&
729 ext->alg != IW_ENCODE_ALG_WEP)
730 if (idx != 0 || ieee->iw_mode != IW_MODE_INFRA)
731 return -EINVAL;
732
733 encoding->flags = idx + 1;
734 memset(ext, 0, sizeof(*ext));
735
736 if (!sec->enabled) {
737 ext->alg = IW_ENCODE_ALG_NONE;
738 ext->key_len = 0;
739 encoding->flags |= IW_ENCODE_DISABLED;
740 } else {
741 if (sec->encode_alg[idx] == SEC_ALG_WEP)
742 ext->alg = IW_ENCODE_ALG_WEP;
743 else if (sec->encode_alg[idx] == SEC_ALG_TKIP)
744 ext->alg = IW_ENCODE_ALG_TKIP;
745 else if (sec->encode_alg[idx] == SEC_ALG_CCMP)
746 ext->alg = IW_ENCODE_ALG_CCMP;
747 else
748 return -EINVAL;
749
750 ext->key_len = sec->key_sizes[idx];
751 memcpy(ext->key, sec->keys[idx], ext->key_len);
752 encoding->flags |= IW_ENCODE_ENABLED;
753 if (ext->key_len &&
754 (ext->alg == IW_ENCODE_ALG_TKIP ||
755 ext->alg == IW_ENCODE_ALG_CCMP))
756 ext->ext_flags |= IW_ENCODE_EXT_TX_SEQ_VALID;
757
758 }
759
760 return 0;
761}
762
763EXPORT_SYMBOL(libipw_wx_set_encodeext);
764EXPORT_SYMBOL(libipw_wx_get_encodeext);
765
766EXPORT_SYMBOL(libipw_wx_get_scan);
767EXPORT_SYMBOL(libipw_wx_set_encode);
768EXPORT_SYMBOL(libipw_wx_get_encode);
769
