xref: /openbmc/linux/net/wireless/wext-compat.c (revision 585b6e13)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * cfg80211 - wext compat code
4  *
5  * This is temporary code until all wireless functionality is migrated
6  * into cfg80211, when that happens all the exports here go away and
7  * we directly assign the wireless handlers of wireless interfaces.
8  *
9  * Copyright 2008-2009	Johannes Berg <johannes@sipsolutions.net>
10  * Copyright (C) 2019-2022 Intel Corporation
11  */
12 
13 #include <linux/export.h>
14 #include <linux/wireless.h>
15 #include <linux/nl80211.h>
16 #include <linux/if_arp.h>
17 #include <linux/etherdevice.h>
18 #include <linux/slab.h>
19 #include <net/iw_handler.h>
20 #include <net/cfg80211.h>
21 #include <net/cfg80211-wext.h>
22 #include "wext-compat.h"
23 #include "core.h"
24 #include "rdev-ops.h"
25 
cfg80211_wext_giwname(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)26 int cfg80211_wext_giwname(struct net_device *dev,
27 			  struct iw_request_info *info,
28 			  union iwreq_data *wrqu, char *extra)
29 {
30 	strcpy(wrqu->name, "IEEE 802.11");
31 	return 0;
32 }
33 EXPORT_WEXT_HANDLER(cfg80211_wext_giwname);
34 
cfg80211_wext_siwmode(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)35 int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
36 			  union iwreq_data *wrqu, char *extra)
37 {
38 	__u32 *mode = &wrqu->mode;
39 	struct wireless_dev *wdev = dev->ieee80211_ptr;
40 	struct cfg80211_registered_device *rdev;
41 	struct vif_params vifparams;
42 	enum nl80211_iftype type;
43 	int ret;
44 
45 	rdev = wiphy_to_rdev(wdev->wiphy);
46 
47 	switch (*mode) {
48 	case IW_MODE_INFRA:
49 		type = NL80211_IFTYPE_STATION;
50 		break;
51 	case IW_MODE_ADHOC:
52 		type = NL80211_IFTYPE_ADHOC;
53 		break;
54 	case IW_MODE_MONITOR:
55 		type = NL80211_IFTYPE_MONITOR;
56 		break;
57 	default:
58 		return -EINVAL;
59 	}
60 
61 	if (type == wdev->iftype)
62 		return 0;
63 
64 	memset(&vifparams, 0, sizeof(vifparams));
65 
66 	wiphy_lock(wdev->wiphy);
67 	ret = cfg80211_change_iface(rdev, dev, type, &vifparams);
68 	wiphy_unlock(wdev->wiphy);
69 
70 	return ret;
71 }
72 EXPORT_WEXT_HANDLER(cfg80211_wext_siwmode);
73 
cfg80211_wext_giwmode(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)74 int cfg80211_wext_giwmode(struct net_device *dev, struct iw_request_info *info,
75 			  union iwreq_data *wrqu, char *extra)
76 {
77 	__u32 *mode = &wrqu->mode;
78 	struct wireless_dev *wdev = dev->ieee80211_ptr;
79 
80 	if (!wdev)
81 		return -EOPNOTSUPP;
82 
83 	switch (wdev->iftype) {
84 	case NL80211_IFTYPE_AP:
85 		*mode = IW_MODE_MASTER;
86 		break;
87 	case NL80211_IFTYPE_STATION:
88 		*mode = IW_MODE_INFRA;
89 		break;
90 	case NL80211_IFTYPE_ADHOC:
91 		*mode = IW_MODE_ADHOC;
92 		break;
93 	case NL80211_IFTYPE_MONITOR:
94 		*mode = IW_MODE_MONITOR;
95 		break;
96 	case NL80211_IFTYPE_WDS:
97 		*mode = IW_MODE_REPEAT;
98 		break;
99 	case NL80211_IFTYPE_AP_VLAN:
100 		*mode = IW_MODE_SECOND;		/* FIXME */
101 		break;
102 	default:
103 		*mode = IW_MODE_AUTO;
104 		break;
105 	}
106 	return 0;
107 }
108 EXPORT_WEXT_HANDLER(cfg80211_wext_giwmode);
109 
110 
cfg80211_wext_giwrange(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)111 int cfg80211_wext_giwrange(struct net_device *dev,
112 			   struct iw_request_info *info,
113 			   union iwreq_data *wrqu, char *extra)
114 {
115 	struct iw_point *data = &wrqu->data;
116 	struct wireless_dev *wdev = dev->ieee80211_ptr;
117 	struct iw_range *range = (struct iw_range *) extra;
118 	enum nl80211_band band;
119 	int i, c = 0;
120 
121 	if (!wdev)
122 		return -EOPNOTSUPP;
123 
124 	data->length = sizeof(struct iw_range);
125 	memset(range, 0, sizeof(struct iw_range));
126 
127 	range->we_version_compiled = WIRELESS_EXT;
128 	range->we_version_source = 21;
129 	range->retry_capa = IW_RETRY_LIMIT;
130 	range->retry_flags = IW_RETRY_LIMIT;
131 	range->min_retry = 0;
132 	range->max_retry = 255;
133 	range->min_rts = 0;
134 	range->max_rts = 2347;
135 	range->min_frag = 256;
136 	range->max_frag = 2346;
137 
138 	range->max_encoding_tokens = 4;
139 
140 	range->max_qual.updated = IW_QUAL_NOISE_INVALID;
141 
142 	switch (wdev->wiphy->signal_type) {
143 	case CFG80211_SIGNAL_TYPE_NONE:
144 		break;
145 	case CFG80211_SIGNAL_TYPE_MBM:
146 		range->max_qual.level = (u8)-110;
147 		range->max_qual.qual = 70;
148 		range->avg_qual.qual = 35;
149 		range->max_qual.updated |= IW_QUAL_DBM;
150 		range->max_qual.updated |= IW_QUAL_QUAL_UPDATED;
151 		range->max_qual.updated |= IW_QUAL_LEVEL_UPDATED;
152 		break;
153 	case CFG80211_SIGNAL_TYPE_UNSPEC:
154 		range->max_qual.level = 100;
155 		range->max_qual.qual = 100;
156 		range->avg_qual.qual = 50;
157 		range->max_qual.updated |= IW_QUAL_QUAL_UPDATED;
158 		range->max_qual.updated |= IW_QUAL_LEVEL_UPDATED;
159 		break;
160 	}
161 
162 	range->avg_qual.level = range->max_qual.level / 2;
163 	range->avg_qual.noise = range->max_qual.noise / 2;
164 	range->avg_qual.updated = range->max_qual.updated;
165 
166 	for (i = 0; i < wdev->wiphy->n_cipher_suites; i++) {
167 		switch (wdev->wiphy->cipher_suites[i]) {
168 		case WLAN_CIPHER_SUITE_TKIP:
169 			range->enc_capa |= (IW_ENC_CAPA_CIPHER_TKIP |
170 					    IW_ENC_CAPA_WPA);
171 			break;
172 
173 		case WLAN_CIPHER_SUITE_CCMP:
174 			range->enc_capa |= (IW_ENC_CAPA_CIPHER_CCMP |
175 					    IW_ENC_CAPA_WPA2);
176 			break;
177 
178 		case WLAN_CIPHER_SUITE_WEP40:
179 			range->encoding_size[range->num_encoding_sizes++] =
180 				WLAN_KEY_LEN_WEP40;
181 			break;
182 
183 		case WLAN_CIPHER_SUITE_WEP104:
184 			range->encoding_size[range->num_encoding_sizes++] =
185 				WLAN_KEY_LEN_WEP104;
186 			break;
187 		}
188 	}
189 
190 	for (band = 0; band < NUM_NL80211_BANDS; band ++) {
191 		struct ieee80211_supported_band *sband;
192 
193 		sband = wdev->wiphy->bands[band];
194 
195 		if (!sband)
196 			continue;
197 
198 		for (i = 0; i < sband->n_channels && c < IW_MAX_FREQUENCIES; i++) {
199 			struct ieee80211_channel *chan = &sband->channels[i];
200 
201 			if (!(chan->flags & IEEE80211_CHAN_DISABLED)) {
202 				range->freq[c].i =
203 					ieee80211_frequency_to_channel(
204 						chan->center_freq);
205 				range->freq[c].m = chan->center_freq;
206 				range->freq[c].e = 6;
207 				c++;
208 			}
209 		}
210 	}
211 	range->num_channels = c;
212 	range->num_frequency = c;
213 
214 	IW_EVENT_CAPA_SET_KERNEL(range->event_capa);
215 	IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWAP);
216 	IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWSCAN);
217 
218 	if (wdev->wiphy->max_scan_ssids > 0)
219 		range->scan_capa |= IW_SCAN_CAPA_ESSID;
220 
221 	return 0;
222 }
223 EXPORT_WEXT_HANDLER(cfg80211_wext_giwrange);
224 
225 
226 /**
227  * cfg80211_wext_freq - get wext frequency for non-"auto"
228  * @freq: the wext freq encoding
229  *
230  * Returns a frequency, or a negative error code, or 0 for auto.
231  */
cfg80211_wext_freq(struct iw_freq * freq)232 int cfg80211_wext_freq(struct iw_freq *freq)
233 {
234 	/*
235 	 * Parse frequency - return 0 for auto and
236 	 * -EINVAL for impossible things.
237 	 */
238 	if (freq->e == 0) {
239 		enum nl80211_band band = NL80211_BAND_2GHZ;
240 		if (freq->m < 0)
241 			return 0;
242 		if (freq->m > 14)
243 			band = NL80211_BAND_5GHZ;
244 		return ieee80211_channel_to_frequency(freq->m, band);
245 	} else {
246 		int i, div = 1000000;
247 		for (i = 0; i < freq->e; i++)
248 			div /= 10;
249 		if (div <= 0)
250 			return -EINVAL;
251 		return freq->m / div;
252 	}
253 }
254 
cfg80211_wext_siwrts(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)255 int cfg80211_wext_siwrts(struct net_device *dev,
256 			 struct iw_request_info *info,
257 			 union iwreq_data *wrqu, char *extra)
258 {
259 	struct iw_param *rts = &wrqu->rts;
260 	struct wireless_dev *wdev = dev->ieee80211_ptr;
261 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
262 	u32 orts = wdev->wiphy->rts_threshold;
263 	int err;
264 
265 	wiphy_lock(&rdev->wiphy);
266 	if (rts->disabled || !rts->fixed) {
267 		wdev->wiphy->rts_threshold = (u32) -1;
268 	} else if (rts->value < 0) {
269 		err = -EINVAL;
270 		goto out;
271 	} else {
272 		wdev->wiphy->rts_threshold = rts->value;
273 	}
274 
275 	err = rdev_set_wiphy_params(rdev, WIPHY_PARAM_RTS_THRESHOLD);
276 
277 	if (err)
278 		wdev->wiphy->rts_threshold = orts;
279 
280 out:
281 	wiphy_unlock(&rdev->wiphy);
282 	return err;
283 }
284 EXPORT_WEXT_HANDLER(cfg80211_wext_siwrts);
285 
cfg80211_wext_giwrts(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)286 int cfg80211_wext_giwrts(struct net_device *dev,
287 			 struct iw_request_info *info,
288 			 union iwreq_data *wrqu, char *extra)
289 {
290 	struct iw_param *rts = &wrqu->rts;
291 	struct wireless_dev *wdev = dev->ieee80211_ptr;
292 
293 	rts->value = wdev->wiphy->rts_threshold;
294 	rts->disabled = rts->value == (u32) -1;
295 	rts->fixed = 1;
296 
297 	return 0;
298 }
299 EXPORT_WEXT_HANDLER(cfg80211_wext_giwrts);
300 
cfg80211_wext_siwfrag(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)301 int cfg80211_wext_siwfrag(struct net_device *dev,
302 			  struct iw_request_info *info,
303 			  union iwreq_data *wrqu, char *extra)
304 {
305 	struct iw_param *frag = &wrqu->frag;
306 	struct wireless_dev *wdev = dev->ieee80211_ptr;
307 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
308 	u32 ofrag = wdev->wiphy->frag_threshold;
309 	int err;
310 
311 	wiphy_lock(&rdev->wiphy);
312 	if (frag->disabled || !frag->fixed) {
313 		wdev->wiphy->frag_threshold = (u32) -1;
314 	} else if (frag->value < 256) {
315 		err = -EINVAL;
316 		goto out;
317 	} else {
318 		/* Fragment length must be even, so strip LSB. */
319 		wdev->wiphy->frag_threshold = frag->value & ~0x1;
320 	}
321 
322 	err = rdev_set_wiphy_params(rdev, WIPHY_PARAM_FRAG_THRESHOLD);
323 	if (err)
324 		wdev->wiphy->frag_threshold = ofrag;
325 out:
326 	wiphy_unlock(&rdev->wiphy);
327 
328 	return err;
329 }
330 EXPORT_WEXT_HANDLER(cfg80211_wext_siwfrag);
331 
cfg80211_wext_giwfrag(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)332 int cfg80211_wext_giwfrag(struct net_device *dev,
333 			  struct iw_request_info *info,
334 			  union iwreq_data *wrqu, char *extra)
335 {
336 	struct iw_param *frag = &wrqu->frag;
337 	struct wireless_dev *wdev = dev->ieee80211_ptr;
338 
339 	frag->value = wdev->wiphy->frag_threshold;
340 	frag->disabled = frag->value == (u32) -1;
341 	frag->fixed = 1;
342 
343 	return 0;
344 }
345 EXPORT_WEXT_HANDLER(cfg80211_wext_giwfrag);
346 
cfg80211_wext_siwretry(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)347 static int cfg80211_wext_siwretry(struct net_device *dev,
348 				  struct iw_request_info *info,
349 				  union iwreq_data *wrqu, char *extra)
350 {
351 	struct iw_param *retry = &wrqu->retry;
352 	struct wireless_dev *wdev = dev->ieee80211_ptr;
353 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
354 	u32 changed = 0;
355 	u8 olong = wdev->wiphy->retry_long;
356 	u8 oshort = wdev->wiphy->retry_short;
357 	int err;
358 
359 	if (retry->disabled || retry->value < 1 || retry->value > 255 ||
360 	    (retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
361 		return -EINVAL;
362 
363 	wiphy_lock(&rdev->wiphy);
364 	if (retry->flags & IW_RETRY_LONG) {
365 		wdev->wiphy->retry_long = retry->value;
366 		changed |= WIPHY_PARAM_RETRY_LONG;
367 	} else if (retry->flags & IW_RETRY_SHORT) {
368 		wdev->wiphy->retry_short = retry->value;
369 		changed |= WIPHY_PARAM_RETRY_SHORT;
370 	} else {
371 		wdev->wiphy->retry_short = retry->value;
372 		wdev->wiphy->retry_long = retry->value;
373 		changed |= WIPHY_PARAM_RETRY_LONG;
374 		changed |= WIPHY_PARAM_RETRY_SHORT;
375 	}
376 
377 	err = rdev_set_wiphy_params(rdev, changed);
378 	if (err) {
379 		wdev->wiphy->retry_short = oshort;
380 		wdev->wiphy->retry_long = olong;
381 	}
382 	wiphy_unlock(&rdev->wiphy);
383 
384 	return err;
385 }
386 
cfg80211_wext_giwretry(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)387 int cfg80211_wext_giwretry(struct net_device *dev,
388 			   struct iw_request_info *info,
389 			   union iwreq_data *wrqu, char *extra)
390 {
391 	struct iw_param *retry = &wrqu->retry;
392 	struct wireless_dev *wdev = dev->ieee80211_ptr;
393 
394 	retry->disabled = 0;
395 
396 	if (retry->flags == 0 || (retry->flags & IW_RETRY_SHORT)) {
397 		/*
398 		 * First return short value, iwconfig will ask long value
399 		 * later if needed
400 		 */
401 		retry->flags |= IW_RETRY_LIMIT | IW_RETRY_SHORT;
402 		retry->value = wdev->wiphy->retry_short;
403 		if (wdev->wiphy->retry_long == wdev->wiphy->retry_short)
404 			retry->flags |= IW_RETRY_LONG;
405 
406 		return 0;
407 	}
408 
409 	if (retry->flags & IW_RETRY_LONG) {
410 		retry->flags = IW_RETRY_LIMIT | IW_RETRY_LONG;
411 		retry->value = wdev->wiphy->retry_long;
412 	}
413 
414 	return 0;
415 }
416 EXPORT_WEXT_HANDLER(cfg80211_wext_giwretry);
417 
__cfg80211_set_encryption(struct cfg80211_registered_device * rdev,struct net_device * dev,bool pairwise,const u8 * addr,bool remove,bool tx_key,int idx,struct key_params * params)418 static int __cfg80211_set_encryption(struct cfg80211_registered_device *rdev,
419 				     struct net_device *dev, bool pairwise,
420 				     const u8 *addr, bool remove, bool tx_key,
421 				     int idx, struct key_params *params)
422 {
423 	struct wireless_dev *wdev = dev->ieee80211_ptr;
424 	int err, i;
425 	bool rejoin = false;
426 
427 	if (wdev->valid_links)
428 		return -EINVAL;
429 
430 	if (pairwise && !addr)
431 		return -EINVAL;
432 
433 	/*
434 	 * In many cases we won't actually need this, but it's better
435 	 * to do it first in case the allocation fails. Don't use wext.
436 	 */
437 	if (!wdev->wext.keys) {
438 		wdev->wext.keys = kzalloc(sizeof(*wdev->wext.keys),
439 					  GFP_KERNEL);
440 		if (!wdev->wext.keys)
441 			return -ENOMEM;
442 		for (i = 0; i < 4; i++)
443 			wdev->wext.keys->params[i].key =
444 				wdev->wext.keys->data[i];
445 	}
446 
447 	if (wdev->iftype != NL80211_IFTYPE_ADHOC &&
448 	    wdev->iftype != NL80211_IFTYPE_STATION)
449 		return -EOPNOTSUPP;
450 
451 	if (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
452 		if (!wdev->connected)
453 			return -ENOLINK;
454 
455 		if (!rdev->ops->set_default_mgmt_key)
456 			return -EOPNOTSUPP;
457 
458 		if (idx < 4 || idx > 5)
459 			return -EINVAL;
460 	} else if (idx < 0 || idx > 3)
461 		return -EINVAL;
462 
463 	if (remove) {
464 		err = 0;
465 		if (wdev->connected ||
466 		    (wdev->iftype == NL80211_IFTYPE_ADHOC &&
467 		     wdev->u.ibss.current_bss)) {
468 			/*
469 			 * If removing the current TX key, we will need to
470 			 * join a new IBSS without the privacy bit clear.
471 			 */
472 			if (idx == wdev->wext.default_key &&
473 			    wdev->iftype == NL80211_IFTYPE_ADHOC) {
474 				__cfg80211_leave_ibss(rdev, wdev->netdev, true);
475 				rejoin = true;
476 			}
477 
478 			if (!pairwise && addr &&
479 			    !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
480 				err = -ENOENT;
481 			else
482 				err = rdev_del_key(rdev, dev, -1, idx, pairwise,
483 						   addr);
484 		}
485 		wdev->wext.connect.privacy = false;
486 		/*
487 		 * Applications using wireless extensions expect to be
488 		 * able to delete keys that don't exist, so allow that.
489 		 */
490 		if (err == -ENOENT)
491 			err = 0;
492 		if (!err) {
493 			if (!addr && idx < 4) {
494 				memset(wdev->wext.keys->data[idx], 0,
495 				       sizeof(wdev->wext.keys->data[idx]));
496 				wdev->wext.keys->params[idx].key_len = 0;
497 				wdev->wext.keys->params[idx].cipher = 0;
498 			}
499 			if (idx == wdev->wext.default_key)
500 				wdev->wext.default_key = -1;
501 			else if (idx == wdev->wext.default_mgmt_key)
502 				wdev->wext.default_mgmt_key = -1;
503 		}
504 
505 		if (!err && rejoin)
506 			err = cfg80211_ibss_wext_join(rdev, wdev);
507 
508 		return err;
509 	}
510 
511 	if (addr)
512 		tx_key = false;
513 
514 	if (cfg80211_validate_key_settings(rdev, params, idx, pairwise, addr))
515 		return -EINVAL;
516 
517 	err = 0;
518 	if (wdev->connected ||
519 	    (wdev->iftype == NL80211_IFTYPE_ADHOC &&
520 	     wdev->u.ibss.current_bss))
521 		err = rdev_add_key(rdev, dev, -1, idx, pairwise, addr, params);
522 	else if (params->cipher != WLAN_CIPHER_SUITE_WEP40 &&
523 		 params->cipher != WLAN_CIPHER_SUITE_WEP104)
524 		return -EINVAL;
525 	if (err)
526 		return err;
527 
528 	/*
529 	 * We only need to store WEP keys, since they're the only keys that
530 	 * can be set before a connection is established and persist after
531 	 * disconnecting.
532 	 */
533 	if (!addr && (params->cipher == WLAN_CIPHER_SUITE_WEP40 ||
534 		      params->cipher == WLAN_CIPHER_SUITE_WEP104)) {
535 		wdev->wext.keys->params[idx] = *params;
536 		memcpy(wdev->wext.keys->data[idx],
537 			params->key, params->key_len);
538 		wdev->wext.keys->params[idx].key =
539 			wdev->wext.keys->data[idx];
540 	}
541 
542 	if ((params->cipher == WLAN_CIPHER_SUITE_WEP40 ||
543 	     params->cipher == WLAN_CIPHER_SUITE_WEP104) &&
544 	    (tx_key || (!addr && wdev->wext.default_key == -1))) {
545 		if (wdev->connected ||
546 		    (wdev->iftype == NL80211_IFTYPE_ADHOC &&
547 		     wdev->u.ibss.current_bss)) {
548 			/*
549 			 * If we are getting a new TX key from not having
550 			 * had one before we need to join a new IBSS with
551 			 * the privacy bit set.
552 			 */
553 			if (wdev->iftype == NL80211_IFTYPE_ADHOC &&
554 			    wdev->wext.default_key == -1) {
555 				__cfg80211_leave_ibss(rdev, wdev->netdev, true);
556 				rejoin = true;
557 			}
558 			err = rdev_set_default_key(rdev, dev, -1, idx, true,
559 						   true);
560 		}
561 		if (!err) {
562 			wdev->wext.default_key = idx;
563 			if (rejoin)
564 				err = cfg80211_ibss_wext_join(rdev, wdev);
565 		}
566 		return err;
567 	}
568 
569 	if (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC &&
570 	    (tx_key || (!addr && wdev->wext.default_mgmt_key == -1))) {
571 		if (wdev->connected ||
572 		    (wdev->iftype == NL80211_IFTYPE_ADHOC &&
573 		     wdev->u.ibss.current_bss))
574 			err = rdev_set_default_mgmt_key(rdev, dev, -1, idx);
575 		if (!err)
576 			wdev->wext.default_mgmt_key = idx;
577 		return err;
578 	}
579 
580 	return 0;
581 }
582 
cfg80211_set_encryption(struct cfg80211_registered_device * rdev,struct net_device * dev,bool pairwise,const u8 * addr,bool remove,bool tx_key,int idx,struct key_params * params)583 static int cfg80211_set_encryption(struct cfg80211_registered_device *rdev,
584 				   struct net_device *dev, bool pairwise,
585 				   const u8 *addr, bool remove, bool tx_key,
586 				   int idx, struct key_params *params)
587 {
588 	int err;
589 
590 	wdev_lock(dev->ieee80211_ptr);
591 	err = __cfg80211_set_encryption(rdev, dev, pairwise, addr,
592 					remove, tx_key, idx, params);
593 	wdev_unlock(dev->ieee80211_ptr);
594 
595 	return err;
596 }
597 
cfg80211_wext_siwencode(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * keybuf)598 static int cfg80211_wext_siwencode(struct net_device *dev,
599 				   struct iw_request_info *info,
600 				   union iwreq_data *wrqu, char *keybuf)
601 {
602 	struct iw_point *erq = &wrqu->encoding;
603 	struct wireless_dev *wdev = dev->ieee80211_ptr;
604 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
605 	int idx, err;
606 	bool remove = false;
607 	struct key_params params;
608 
609 	if (wdev->iftype != NL80211_IFTYPE_STATION &&
610 	    wdev->iftype != NL80211_IFTYPE_ADHOC)
611 		return -EOPNOTSUPP;
612 
613 	/* no use -- only MFP (set_default_mgmt_key) is optional */
614 	if (!rdev->ops->del_key ||
615 	    !rdev->ops->add_key ||
616 	    !rdev->ops->set_default_key)
617 		return -EOPNOTSUPP;
618 
619 	wiphy_lock(&rdev->wiphy);
620 	if (wdev->valid_links) {
621 		err = -EOPNOTSUPP;
622 		goto out;
623 	}
624 
625 	idx = erq->flags & IW_ENCODE_INDEX;
626 	if (idx == 0) {
627 		idx = wdev->wext.default_key;
628 		if (idx < 0)
629 			idx = 0;
630 	} else if (idx < 1 || idx > 4) {
631 		err = -EINVAL;
632 		goto out;
633 	} else {
634 		idx--;
635 	}
636 
637 	if (erq->flags & IW_ENCODE_DISABLED)
638 		remove = true;
639 	else if (erq->length == 0) {
640 		/* No key data - just set the default TX key index */
641 		err = 0;
642 		wdev_lock(wdev);
643 		if (wdev->connected ||
644 		    (wdev->iftype == NL80211_IFTYPE_ADHOC &&
645 		     wdev->u.ibss.current_bss))
646 			err = rdev_set_default_key(rdev, dev, -1, idx, true,
647 						   true);
648 		if (!err)
649 			wdev->wext.default_key = idx;
650 		wdev_unlock(wdev);
651 		goto out;
652 	}
653 
654 	memset(&params, 0, sizeof(params));
655 	params.key = keybuf;
656 	params.key_len = erq->length;
657 	if (erq->length == 5) {
658 		params.cipher = WLAN_CIPHER_SUITE_WEP40;
659 	} else if (erq->length == 13) {
660 		params.cipher = WLAN_CIPHER_SUITE_WEP104;
661 	} else if (!remove) {
662 		err = -EINVAL;
663 		goto out;
664 	}
665 
666 	err = cfg80211_set_encryption(rdev, dev, false, NULL, remove,
667 				      wdev->wext.default_key == -1,
668 				      idx, &params);
669 out:
670 	wiphy_unlock(&rdev->wiphy);
671 
672 	return err;
673 }
674 
cfg80211_wext_siwencodeext(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)675 static int cfg80211_wext_siwencodeext(struct net_device *dev,
676 				      struct iw_request_info *info,
677 				      union iwreq_data *wrqu, char *extra)
678 {
679 	struct iw_point *erq = &wrqu->encoding;
680 	struct wireless_dev *wdev = dev->ieee80211_ptr;
681 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
682 	struct iw_encode_ext *ext = (struct iw_encode_ext *) extra;
683 	const u8 *addr;
684 	int idx;
685 	bool remove = false;
686 	struct key_params params;
687 	u32 cipher;
688 	int ret;
689 
690 	if (wdev->iftype != NL80211_IFTYPE_STATION &&
691 	    wdev->iftype != NL80211_IFTYPE_ADHOC)
692 		return -EOPNOTSUPP;
693 
694 	/* no use -- only MFP (set_default_mgmt_key) is optional */
695 	if (!rdev->ops->del_key ||
696 	    !rdev->ops->add_key ||
697 	    !rdev->ops->set_default_key)
698 		return -EOPNOTSUPP;
699 
700 	wdev_lock(wdev);
701 	if (wdev->valid_links) {
702 		wdev_unlock(wdev);
703 		return -EOPNOTSUPP;
704 	}
705 	wdev_unlock(wdev);
706 
707 	switch (ext->alg) {
708 	case IW_ENCODE_ALG_NONE:
709 		remove = true;
710 		cipher = 0;
711 		break;
712 	case IW_ENCODE_ALG_WEP:
713 		if (ext->key_len == 5)
714 			cipher = WLAN_CIPHER_SUITE_WEP40;
715 		else if (ext->key_len == 13)
716 			cipher = WLAN_CIPHER_SUITE_WEP104;
717 		else
718 			return -EINVAL;
719 		break;
720 	case IW_ENCODE_ALG_TKIP:
721 		cipher = WLAN_CIPHER_SUITE_TKIP;
722 		break;
723 	case IW_ENCODE_ALG_CCMP:
724 		cipher = WLAN_CIPHER_SUITE_CCMP;
725 		break;
726 	case IW_ENCODE_ALG_AES_CMAC:
727 		cipher = WLAN_CIPHER_SUITE_AES_CMAC;
728 		break;
729 	default:
730 		return -EOPNOTSUPP;
731 	}
732 
733 	if (erq->flags & IW_ENCODE_DISABLED)
734 		remove = true;
735 
736 	idx = erq->flags & IW_ENCODE_INDEX;
737 	if (cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
738 		if (idx < 4 || idx > 5) {
739 			idx = wdev->wext.default_mgmt_key;
740 			if (idx < 0)
741 				return -EINVAL;
742 		} else
743 			idx--;
744 	} else {
745 		if (idx < 1 || idx > 4) {
746 			idx = wdev->wext.default_key;
747 			if (idx < 0)
748 				return -EINVAL;
749 		} else
750 			idx--;
751 	}
752 
753 	addr = ext->addr.sa_data;
754 	if (is_broadcast_ether_addr(addr))
755 		addr = NULL;
756 
757 	memset(&params, 0, sizeof(params));
758 	params.key = ext->key;
759 	params.key_len = ext->key_len;
760 	params.cipher = cipher;
761 
762 	if (ext->ext_flags & IW_ENCODE_EXT_RX_SEQ_VALID) {
763 		params.seq = ext->rx_seq;
764 		params.seq_len = 6;
765 	}
766 
767 	wiphy_lock(wdev->wiphy);
768 	ret = cfg80211_set_encryption(
769 			rdev, dev,
770 			!(ext->ext_flags & IW_ENCODE_EXT_GROUP_KEY),
771 			addr, remove,
772 			ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY,
773 			idx, &params);
774 	wiphy_unlock(wdev->wiphy);
775 
776 	return ret;
777 }
778 
cfg80211_wext_giwencode(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * keybuf)779 static int cfg80211_wext_giwencode(struct net_device *dev,
780 				   struct iw_request_info *info,
781 				   union iwreq_data *wrqu, char *keybuf)
782 {
783 	struct iw_point *erq = &wrqu->encoding;
784 	struct wireless_dev *wdev = dev->ieee80211_ptr;
785 	int idx;
786 
787 	if (wdev->iftype != NL80211_IFTYPE_STATION &&
788 	    wdev->iftype != NL80211_IFTYPE_ADHOC)
789 		return -EOPNOTSUPP;
790 
791 	idx = erq->flags & IW_ENCODE_INDEX;
792 	if (idx == 0) {
793 		idx = wdev->wext.default_key;
794 		if (idx < 0)
795 			idx = 0;
796 	} else if (idx < 1 || idx > 4)
797 		return -EINVAL;
798 	else
799 		idx--;
800 
801 	erq->flags = idx + 1;
802 
803 	if (!wdev->wext.keys || !wdev->wext.keys->params[idx].cipher) {
804 		erq->flags |= IW_ENCODE_DISABLED;
805 		erq->length = 0;
806 		return 0;
807 	}
808 
809 	erq->length = min_t(size_t, erq->length,
810 			    wdev->wext.keys->params[idx].key_len);
811 	memcpy(keybuf, wdev->wext.keys->params[idx].key, erq->length);
812 	erq->flags |= IW_ENCODE_ENABLED;
813 
814 	return 0;
815 }
816 
cfg80211_wext_siwfreq(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)817 static int cfg80211_wext_siwfreq(struct net_device *dev,
818 				 struct iw_request_info *info,
819 				 union iwreq_data *wrqu, char *extra)
820 {
821 	struct iw_freq *wextfreq = &wrqu->freq;
822 	struct wireless_dev *wdev = dev->ieee80211_ptr;
823 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
824 	struct cfg80211_chan_def chandef = {
825 		.width = NL80211_CHAN_WIDTH_20_NOHT,
826 	};
827 	int freq, ret;
828 
829 	wiphy_lock(&rdev->wiphy);
830 
831 	switch (wdev->iftype) {
832 	case NL80211_IFTYPE_STATION:
833 		ret = cfg80211_mgd_wext_siwfreq(dev, info, wextfreq, extra);
834 		break;
835 	case NL80211_IFTYPE_ADHOC:
836 		ret = cfg80211_ibss_wext_siwfreq(dev, info, wextfreq, extra);
837 		break;
838 	case NL80211_IFTYPE_MONITOR:
839 		freq = cfg80211_wext_freq(wextfreq);
840 		if (freq < 0) {
841 			ret = freq;
842 			break;
843 		}
844 		if (freq == 0) {
845 			ret = -EINVAL;
846 			break;
847 		}
848 		chandef.center_freq1 = freq;
849 		chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
850 		if (!chandef.chan) {
851 			ret = -EINVAL;
852 			break;
853 		}
854 		ret = cfg80211_set_monitor_channel(rdev, &chandef);
855 		break;
856 	case NL80211_IFTYPE_MESH_POINT:
857 		freq = cfg80211_wext_freq(wextfreq);
858 		if (freq < 0) {
859 			ret = freq;
860 			break;
861 		}
862 		if (freq == 0) {
863 			ret = -EINVAL;
864 			break;
865 		}
866 		chandef.center_freq1 = freq;
867 		chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
868 		if (!chandef.chan) {
869 			ret = -EINVAL;
870 			break;
871 		}
872 		ret = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
873 		break;
874 	default:
875 		ret = -EOPNOTSUPP;
876 		break;
877 	}
878 
879 	wiphy_unlock(&rdev->wiphy);
880 
881 	return ret;
882 }
883 
cfg80211_wext_giwfreq(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)884 static int cfg80211_wext_giwfreq(struct net_device *dev,
885 				 struct iw_request_info *info,
886 				 union iwreq_data *wrqu, char *extra)
887 {
888 	struct iw_freq *freq = &wrqu->freq;
889 	struct wireless_dev *wdev = dev->ieee80211_ptr;
890 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
891 	struct cfg80211_chan_def chandef = {};
892 	int ret;
893 
894 	wiphy_lock(&rdev->wiphy);
895 	switch (wdev->iftype) {
896 	case NL80211_IFTYPE_STATION:
897 		ret = cfg80211_mgd_wext_giwfreq(dev, info, freq, extra);
898 		break;
899 	case NL80211_IFTYPE_ADHOC:
900 		ret = cfg80211_ibss_wext_giwfreq(dev, info, freq, extra);
901 		break;
902 	case NL80211_IFTYPE_MONITOR:
903 		if (!rdev->ops->get_channel) {
904 			ret = -EINVAL;
905 			break;
906 		}
907 
908 		ret = rdev_get_channel(rdev, wdev, 0, &chandef);
909 		if (ret)
910 			break;
911 		freq->m = chandef.chan->center_freq;
912 		freq->e = 6;
913 		ret = 0;
914 		break;
915 	default:
916 		ret = -EINVAL;
917 		break;
918 	}
919 
920 	wiphy_unlock(&rdev->wiphy);
921 
922 	return ret;
923 }
924 
cfg80211_wext_siwtxpower(struct net_device * dev,struct iw_request_info * info,union iwreq_data * data,char * extra)925 static int cfg80211_wext_siwtxpower(struct net_device *dev,
926 				    struct iw_request_info *info,
927 				    union iwreq_data *data, char *extra)
928 {
929 	struct wireless_dev *wdev = dev->ieee80211_ptr;
930 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
931 	enum nl80211_tx_power_setting type;
932 	int dbm = 0;
933 	int ret;
934 
935 	if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
936 		return -EINVAL;
937 	if (data->txpower.flags & IW_TXPOW_RANGE)
938 		return -EINVAL;
939 
940 	if (!rdev->ops->set_tx_power)
941 		return -EOPNOTSUPP;
942 
943 	/* only change when not disabling */
944 	if (!data->txpower.disabled) {
945 		rfkill_set_sw_state(rdev->wiphy.rfkill, false);
946 
947 		if (data->txpower.fixed) {
948 			/*
949 			 * wext doesn't support negative values, see
950 			 * below where it's for automatic
951 			 */
952 			if (data->txpower.value < 0)
953 				return -EINVAL;
954 			dbm = data->txpower.value;
955 			type = NL80211_TX_POWER_FIXED;
956 			/* TODO: do regulatory check! */
957 		} else {
958 			/*
959 			 * Automatic power level setting, max being the value
960 			 * passed in from userland.
961 			 */
962 			if (data->txpower.value < 0) {
963 				type = NL80211_TX_POWER_AUTOMATIC;
964 			} else {
965 				dbm = data->txpower.value;
966 				type = NL80211_TX_POWER_LIMITED;
967 			}
968 		}
969 	} else {
970 		if (rfkill_set_sw_state(rdev->wiphy.rfkill, true))
971 			schedule_work(&rdev->rfkill_block);
972 		return 0;
973 	}
974 
975 	wiphy_lock(&rdev->wiphy);
976 	ret = rdev_set_tx_power(rdev, wdev, type, DBM_TO_MBM(dbm));
977 	wiphy_unlock(&rdev->wiphy);
978 
979 	return ret;
980 }
981 
cfg80211_wext_giwtxpower(struct net_device * dev,struct iw_request_info * info,union iwreq_data * data,char * extra)982 static int cfg80211_wext_giwtxpower(struct net_device *dev,
983 				    struct iw_request_info *info,
984 				    union iwreq_data *data, char *extra)
985 {
986 	struct wireless_dev *wdev = dev->ieee80211_ptr;
987 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
988 	int err, val;
989 
990 	if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
991 		return -EINVAL;
992 	if (data->txpower.flags & IW_TXPOW_RANGE)
993 		return -EINVAL;
994 
995 	if (!rdev->ops->get_tx_power)
996 		return -EOPNOTSUPP;
997 
998 	wiphy_lock(&rdev->wiphy);
999 	err = rdev_get_tx_power(rdev, wdev, &val);
1000 	wiphy_unlock(&rdev->wiphy);
1001 	if (err)
1002 		return err;
1003 
1004 	/* well... oh well */
1005 	data->txpower.fixed = 1;
1006 	data->txpower.disabled = rfkill_blocked(rdev->wiphy.rfkill);
1007 	data->txpower.value = val;
1008 	data->txpower.flags = IW_TXPOW_DBM;
1009 
1010 	return 0;
1011 }
1012 
cfg80211_set_auth_alg(struct wireless_dev * wdev,s32 auth_alg)1013 static int cfg80211_set_auth_alg(struct wireless_dev *wdev,
1014 				 s32 auth_alg)
1015 {
1016 	int nr_alg = 0;
1017 
1018 	if (!auth_alg)
1019 		return -EINVAL;
1020 
1021 	if (auth_alg & ~(IW_AUTH_ALG_OPEN_SYSTEM |
1022 			 IW_AUTH_ALG_SHARED_KEY |
1023 			 IW_AUTH_ALG_LEAP))
1024 		return -EINVAL;
1025 
1026 	if (auth_alg & IW_AUTH_ALG_OPEN_SYSTEM) {
1027 		nr_alg++;
1028 		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1029 	}
1030 
1031 	if (auth_alg & IW_AUTH_ALG_SHARED_KEY) {
1032 		nr_alg++;
1033 		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_SHARED_KEY;
1034 	}
1035 
1036 	if (auth_alg & IW_AUTH_ALG_LEAP) {
1037 		nr_alg++;
1038 		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_NETWORK_EAP;
1039 	}
1040 
1041 	if (nr_alg > 1)
1042 		wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1043 
1044 	return 0;
1045 }
1046 
cfg80211_set_wpa_version(struct wireless_dev * wdev,u32 wpa_versions)1047 static int cfg80211_set_wpa_version(struct wireless_dev *wdev, u32 wpa_versions)
1048 {
1049 	if (wpa_versions & ~(IW_AUTH_WPA_VERSION_WPA |
1050 			     IW_AUTH_WPA_VERSION_WPA2|
1051 		             IW_AUTH_WPA_VERSION_DISABLED))
1052 		return -EINVAL;
1053 
1054 	if ((wpa_versions & IW_AUTH_WPA_VERSION_DISABLED) &&
1055 	    (wpa_versions & (IW_AUTH_WPA_VERSION_WPA|
1056 			     IW_AUTH_WPA_VERSION_WPA2)))
1057 		return -EINVAL;
1058 
1059 	if (wpa_versions & IW_AUTH_WPA_VERSION_DISABLED)
1060 		wdev->wext.connect.crypto.wpa_versions &=
1061 			~(NL80211_WPA_VERSION_1|NL80211_WPA_VERSION_2);
1062 
1063 	if (wpa_versions & IW_AUTH_WPA_VERSION_WPA)
1064 		wdev->wext.connect.crypto.wpa_versions |=
1065 			NL80211_WPA_VERSION_1;
1066 
1067 	if (wpa_versions & IW_AUTH_WPA_VERSION_WPA2)
1068 		wdev->wext.connect.crypto.wpa_versions |=
1069 			NL80211_WPA_VERSION_2;
1070 
1071 	return 0;
1072 }
1073 
cfg80211_set_cipher_group(struct wireless_dev * wdev,u32 cipher)1074 static int cfg80211_set_cipher_group(struct wireless_dev *wdev, u32 cipher)
1075 {
1076 	if (cipher & IW_AUTH_CIPHER_WEP40)
1077 		wdev->wext.connect.crypto.cipher_group =
1078 			WLAN_CIPHER_SUITE_WEP40;
1079 	else if (cipher & IW_AUTH_CIPHER_WEP104)
1080 		wdev->wext.connect.crypto.cipher_group =
1081 			WLAN_CIPHER_SUITE_WEP104;
1082 	else if (cipher & IW_AUTH_CIPHER_TKIP)
1083 		wdev->wext.connect.crypto.cipher_group =
1084 			WLAN_CIPHER_SUITE_TKIP;
1085 	else if (cipher & IW_AUTH_CIPHER_CCMP)
1086 		wdev->wext.connect.crypto.cipher_group =
1087 			WLAN_CIPHER_SUITE_CCMP;
1088 	else if (cipher & IW_AUTH_CIPHER_AES_CMAC)
1089 		wdev->wext.connect.crypto.cipher_group =
1090 			WLAN_CIPHER_SUITE_AES_CMAC;
1091 	else if (cipher & IW_AUTH_CIPHER_NONE)
1092 		wdev->wext.connect.crypto.cipher_group = 0;
1093 	else
1094 		return -EINVAL;
1095 
1096 	return 0;
1097 }
1098 
cfg80211_set_cipher_pairwise(struct wireless_dev * wdev,u32 cipher)1099 static int cfg80211_set_cipher_pairwise(struct wireless_dev *wdev, u32 cipher)
1100 {
1101 	int nr_ciphers = 0;
1102 	u32 *ciphers_pairwise = wdev->wext.connect.crypto.ciphers_pairwise;
1103 
1104 	if (cipher & IW_AUTH_CIPHER_WEP40) {
1105 		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_WEP40;
1106 		nr_ciphers++;
1107 	}
1108 
1109 	if (cipher & IW_AUTH_CIPHER_WEP104) {
1110 		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_WEP104;
1111 		nr_ciphers++;
1112 	}
1113 
1114 	if (cipher & IW_AUTH_CIPHER_TKIP) {
1115 		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_TKIP;
1116 		nr_ciphers++;
1117 	}
1118 
1119 	if (cipher & IW_AUTH_CIPHER_CCMP) {
1120 		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_CCMP;
1121 		nr_ciphers++;
1122 	}
1123 
1124 	if (cipher & IW_AUTH_CIPHER_AES_CMAC) {
1125 		ciphers_pairwise[nr_ciphers] = WLAN_CIPHER_SUITE_AES_CMAC;
1126 		nr_ciphers++;
1127 	}
1128 
1129 	BUILD_BUG_ON(NL80211_MAX_NR_CIPHER_SUITES < 5);
1130 
1131 	wdev->wext.connect.crypto.n_ciphers_pairwise = nr_ciphers;
1132 
1133 	return 0;
1134 }
1135 
1136 
cfg80211_set_key_mgt(struct wireless_dev * wdev,u32 key_mgt)1137 static int cfg80211_set_key_mgt(struct wireless_dev *wdev, u32 key_mgt)
1138 {
1139 	int nr_akm_suites = 0;
1140 
1141 	if (key_mgt & ~(IW_AUTH_KEY_MGMT_802_1X |
1142 			IW_AUTH_KEY_MGMT_PSK))
1143 		return -EINVAL;
1144 
1145 	if (key_mgt & IW_AUTH_KEY_MGMT_802_1X) {
1146 		wdev->wext.connect.crypto.akm_suites[nr_akm_suites] =
1147 			WLAN_AKM_SUITE_8021X;
1148 		nr_akm_suites++;
1149 	}
1150 
1151 	if (key_mgt & IW_AUTH_KEY_MGMT_PSK) {
1152 		wdev->wext.connect.crypto.akm_suites[nr_akm_suites] =
1153 			WLAN_AKM_SUITE_PSK;
1154 		nr_akm_suites++;
1155 	}
1156 
1157 	wdev->wext.connect.crypto.n_akm_suites = nr_akm_suites;
1158 
1159 	return 0;
1160 }
1161 
cfg80211_wext_siwauth(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)1162 static int cfg80211_wext_siwauth(struct net_device *dev,
1163 				 struct iw_request_info *info,
1164 				 union iwreq_data *wrqu, char *extra)
1165 {
1166 	struct iw_param *data = &wrqu->param;
1167 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1168 
1169 	if (wdev->iftype != NL80211_IFTYPE_STATION)
1170 		return -EOPNOTSUPP;
1171 
1172 	switch (data->flags & IW_AUTH_INDEX) {
1173 	case IW_AUTH_PRIVACY_INVOKED:
1174 		wdev->wext.connect.privacy = data->value;
1175 		return 0;
1176 	case IW_AUTH_WPA_VERSION:
1177 		return cfg80211_set_wpa_version(wdev, data->value);
1178 	case IW_AUTH_CIPHER_GROUP:
1179 		return cfg80211_set_cipher_group(wdev, data->value);
1180 	case IW_AUTH_KEY_MGMT:
1181 		return cfg80211_set_key_mgt(wdev, data->value);
1182 	case IW_AUTH_CIPHER_PAIRWISE:
1183 		return cfg80211_set_cipher_pairwise(wdev, data->value);
1184 	case IW_AUTH_80211_AUTH_ALG:
1185 		return cfg80211_set_auth_alg(wdev, data->value);
1186 	case IW_AUTH_WPA_ENABLED:
1187 	case IW_AUTH_RX_UNENCRYPTED_EAPOL:
1188 	case IW_AUTH_DROP_UNENCRYPTED:
1189 	case IW_AUTH_MFP:
1190 		return 0;
1191 	default:
1192 		return -EOPNOTSUPP;
1193 	}
1194 }
1195 
cfg80211_wext_giwauth(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)1196 static int cfg80211_wext_giwauth(struct net_device *dev,
1197 				 struct iw_request_info *info,
1198 				 union iwreq_data *wrqu, char *extra)
1199 {
1200 	/* XXX: what do we need? */
1201 
1202 	return -EOPNOTSUPP;
1203 }
1204 
cfg80211_wext_siwpower(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)1205 static int cfg80211_wext_siwpower(struct net_device *dev,
1206 				  struct iw_request_info *info,
1207 				  union iwreq_data *wrqu, char *extra)
1208 {
1209 	struct iw_param *wrq = &wrqu->power;
1210 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1211 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1212 	bool ps;
1213 	int timeout = wdev->ps_timeout;
1214 	int err;
1215 
1216 	if (wdev->iftype != NL80211_IFTYPE_STATION)
1217 		return -EINVAL;
1218 
1219 	if (!rdev->ops->set_power_mgmt)
1220 		return -EOPNOTSUPP;
1221 
1222 	if (wrq->disabled) {
1223 		ps = false;
1224 	} else {
1225 		switch (wrq->flags & IW_POWER_MODE) {
1226 		case IW_POWER_ON:       /* If not specified */
1227 		case IW_POWER_MODE:     /* If set all mask */
1228 		case IW_POWER_ALL_R:    /* If explicitely state all */
1229 			ps = true;
1230 			break;
1231 		default:                /* Otherwise we ignore */
1232 			return -EINVAL;
1233 		}
1234 
1235 		if (wrq->flags & ~(IW_POWER_MODE | IW_POWER_TIMEOUT))
1236 			return -EINVAL;
1237 
1238 		if (wrq->flags & IW_POWER_TIMEOUT)
1239 			timeout = wrq->value / 1000;
1240 	}
1241 
1242 	wiphy_lock(&rdev->wiphy);
1243 	err = rdev_set_power_mgmt(rdev, dev, ps, timeout);
1244 	wiphy_unlock(&rdev->wiphy);
1245 	if (err)
1246 		return err;
1247 
1248 	wdev->ps = ps;
1249 	wdev->ps_timeout = timeout;
1250 
1251 	return 0;
1252 
1253 }
1254 
cfg80211_wext_giwpower(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)1255 static int cfg80211_wext_giwpower(struct net_device *dev,
1256 				  struct iw_request_info *info,
1257 				  union iwreq_data *wrqu, char *extra)
1258 {
1259 	struct iw_param *wrq = &wrqu->power;
1260 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1261 
1262 	wrq->disabled = !wdev->ps;
1263 
1264 	return 0;
1265 }
1266 
cfg80211_wext_siwrate(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)1267 static int cfg80211_wext_siwrate(struct net_device *dev,
1268 				 struct iw_request_info *info,
1269 				 union iwreq_data *wrqu, char *extra)
1270 {
1271 	struct iw_param *rate = &wrqu->bitrate;
1272 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1273 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1274 	struct cfg80211_bitrate_mask mask;
1275 	u32 fixed, maxrate;
1276 	struct ieee80211_supported_band *sband;
1277 	int band, ridx, ret;
1278 	bool match = false;
1279 
1280 	if (!rdev->ops->set_bitrate_mask)
1281 		return -EOPNOTSUPP;
1282 
1283 	memset(&mask, 0, sizeof(mask));
1284 	fixed = 0;
1285 	maxrate = (u32)-1;
1286 
1287 	if (rate->value < 0) {
1288 		/* nothing */
1289 	} else if (rate->fixed) {
1290 		fixed = rate->value / 100000;
1291 	} else {
1292 		maxrate = rate->value / 100000;
1293 	}
1294 
1295 	for (band = 0; band < NUM_NL80211_BANDS; band++) {
1296 		sband = wdev->wiphy->bands[band];
1297 		if (sband == NULL)
1298 			continue;
1299 		for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
1300 			struct ieee80211_rate *srate = &sband->bitrates[ridx];
1301 			if (fixed == srate->bitrate) {
1302 				mask.control[band].legacy = 1 << ridx;
1303 				match = true;
1304 				break;
1305 			}
1306 			if (srate->bitrate <= maxrate) {
1307 				mask.control[band].legacy |= 1 << ridx;
1308 				match = true;
1309 			}
1310 		}
1311 	}
1312 
1313 	if (!match)
1314 		return -EINVAL;
1315 
1316 	wiphy_lock(&rdev->wiphy);
1317 	if (dev->ieee80211_ptr->valid_links)
1318 		ret = -EOPNOTSUPP;
1319 	else
1320 		ret = rdev_set_bitrate_mask(rdev, dev, 0, NULL, &mask);
1321 	wiphy_unlock(&rdev->wiphy);
1322 
1323 	return ret;
1324 }
1325 
cfg80211_wext_giwrate(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)1326 static int cfg80211_wext_giwrate(struct net_device *dev,
1327 				 struct iw_request_info *info,
1328 				 union iwreq_data *wrqu, char *extra)
1329 {
1330 	struct iw_param *rate = &wrqu->bitrate;
1331 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1332 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1333 	struct station_info sinfo = {};
1334 	u8 addr[ETH_ALEN];
1335 	int err;
1336 
1337 	if (wdev->iftype != NL80211_IFTYPE_STATION)
1338 		return -EOPNOTSUPP;
1339 
1340 	if (!rdev->ops->get_station)
1341 		return -EOPNOTSUPP;
1342 
1343 	err = 0;
1344 	wdev_lock(wdev);
1345 	if (!wdev->valid_links && wdev->links[0].client.current_bss)
1346 		memcpy(addr, wdev->links[0].client.current_bss->pub.bssid,
1347 		       ETH_ALEN);
1348 	else
1349 		err = -EOPNOTSUPP;
1350 	wdev_unlock(wdev);
1351 	if (err)
1352 		return err;
1353 
1354 	wiphy_lock(&rdev->wiphy);
1355 	err = rdev_get_station(rdev, dev, addr, &sinfo);
1356 	wiphy_unlock(&rdev->wiphy);
1357 	if (err)
1358 		return err;
1359 
1360 	if (!(sinfo.filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) {
1361 		err = -EOPNOTSUPP;
1362 		goto free;
1363 	}
1364 
1365 	rate->value = 100000 * cfg80211_calculate_bitrate(&sinfo.txrate);
1366 
1367 free:
1368 	cfg80211_sinfo_release_content(&sinfo);
1369 	return err;
1370 }
1371 
1372 /* Get wireless statistics.  Called by /proc/net/wireless and by SIOCGIWSTATS */
cfg80211_wireless_stats(struct net_device * dev)1373 static struct iw_statistics *cfg80211_wireless_stats(struct net_device *dev)
1374 {
1375 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1376 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1377 	/* we are under RTNL - globally locked - so can use static structs */
1378 	static struct iw_statistics wstats;
1379 	static struct station_info sinfo = {};
1380 	u8 bssid[ETH_ALEN];
1381 	int ret;
1382 
1383 	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION)
1384 		return NULL;
1385 
1386 	if (!rdev->ops->get_station)
1387 		return NULL;
1388 
1389 	/* Grab BSSID of current BSS, if any */
1390 	wdev_lock(wdev);
1391 	if (wdev->valid_links || !wdev->links[0].client.current_bss) {
1392 		wdev_unlock(wdev);
1393 		return NULL;
1394 	}
1395 	memcpy(bssid, wdev->links[0].client.current_bss->pub.bssid, ETH_ALEN);
1396 	wdev_unlock(wdev);
1397 
1398 	memset(&sinfo, 0, sizeof(sinfo));
1399 
1400 	wiphy_lock(&rdev->wiphy);
1401 	ret = rdev_get_station(rdev, dev, bssid, &sinfo);
1402 	wiphy_unlock(&rdev->wiphy);
1403 
1404 	if (ret)
1405 		return NULL;
1406 
1407 	memset(&wstats, 0, sizeof(wstats));
1408 
1409 	switch (rdev->wiphy.signal_type) {
1410 	case CFG80211_SIGNAL_TYPE_MBM:
1411 		if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_SIGNAL)) {
1412 			int sig = sinfo.signal;
1413 			wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED;
1414 			wstats.qual.updated |= IW_QUAL_QUAL_UPDATED;
1415 			wstats.qual.updated |= IW_QUAL_DBM;
1416 			wstats.qual.level = sig;
1417 			if (sig < -110)
1418 				sig = -110;
1419 			else if (sig > -40)
1420 				sig = -40;
1421 			wstats.qual.qual = sig + 110;
1422 			break;
1423 		}
1424 		fallthrough;
1425 	case CFG80211_SIGNAL_TYPE_UNSPEC:
1426 		if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_SIGNAL)) {
1427 			wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED;
1428 			wstats.qual.updated |= IW_QUAL_QUAL_UPDATED;
1429 			wstats.qual.level = sinfo.signal;
1430 			wstats.qual.qual = sinfo.signal;
1431 			break;
1432 		}
1433 		fallthrough;
1434 	default:
1435 		wstats.qual.updated |= IW_QUAL_LEVEL_INVALID;
1436 		wstats.qual.updated |= IW_QUAL_QUAL_INVALID;
1437 	}
1438 
1439 	wstats.qual.updated |= IW_QUAL_NOISE_INVALID;
1440 	if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC))
1441 		wstats.discard.misc = sinfo.rx_dropped_misc;
1442 	if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))
1443 		wstats.discard.retries = sinfo.tx_failed;
1444 
1445 	cfg80211_sinfo_release_content(&sinfo);
1446 
1447 	return &wstats;
1448 }
1449 
cfg80211_wext_siwap(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)1450 static int cfg80211_wext_siwap(struct net_device *dev,
1451 			       struct iw_request_info *info,
1452 			       union iwreq_data *wrqu, char *extra)
1453 {
1454 	struct sockaddr *ap_addr = &wrqu->ap_addr;
1455 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1456 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1457 	int ret;
1458 
1459 	wiphy_lock(&rdev->wiphy);
1460 	switch (wdev->iftype) {
1461 	case NL80211_IFTYPE_ADHOC:
1462 		ret = cfg80211_ibss_wext_siwap(dev, info, ap_addr, extra);
1463 		break;
1464 	case NL80211_IFTYPE_STATION:
1465 		ret = cfg80211_mgd_wext_siwap(dev, info, ap_addr, extra);
1466 		break;
1467 	default:
1468 		ret = -EOPNOTSUPP;
1469 		break;
1470 	}
1471 	wiphy_unlock(&rdev->wiphy);
1472 
1473 	return ret;
1474 }
1475 
cfg80211_wext_giwap(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)1476 static int cfg80211_wext_giwap(struct net_device *dev,
1477 			       struct iw_request_info *info,
1478 			       union iwreq_data *wrqu, char *extra)
1479 {
1480 	struct sockaddr *ap_addr = &wrqu->ap_addr;
1481 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1482 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1483 	int ret;
1484 
1485 	wiphy_lock(&rdev->wiphy);
1486 	switch (wdev->iftype) {
1487 	case NL80211_IFTYPE_ADHOC:
1488 		ret = cfg80211_ibss_wext_giwap(dev, info, ap_addr, extra);
1489 		break;
1490 	case NL80211_IFTYPE_STATION:
1491 		ret = cfg80211_mgd_wext_giwap(dev, info, ap_addr, extra);
1492 		break;
1493 	default:
1494 		ret = -EOPNOTSUPP;
1495 		break;
1496 	}
1497 	wiphy_unlock(&rdev->wiphy);
1498 
1499 	return ret;
1500 }
1501 
cfg80211_wext_siwessid(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * ssid)1502 static int cfg80211_wext_siwessid(struct net_device *dev,
1503 				  struct iw_request_info *info,
1504 				  union iwreq_data *wrqu, char *ssid)
1505 {
1506 	struct iw_point *data = &wrqu->data;
1507 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1508 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1509 	int ret;
1510 
1511 	wiphy_lock(&rdev->wiphy);
1512 	switch (wdev->iftype) {
1513 	case NL80211_IFTYPE_ADHOC:
1514 		ret = cfg80211_ibss_wext_siwessid(dev, info, data, ssid);
1515 		break;
1516 	case NL80211_IFTYPE_STATION:
1517 		ret = cfg80211_mgd_wext_siwessid(dev, info, data, ssid);
1518 		break;
1519 	default:
1520 		ret = -EOPNOTSUPP;
1521 		break;
1522 	}
1523 	wiphy_unlock(&rdev->wiphy);
1524 
1525 	return ret;
1526 }
1527 
cfg80211_wext_giwessid(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * ssid)1528 static int cfg80211_wext_giwessid(struct net_device *dev,
1529 				  struct iw_request_info *info,
1530 				  union iwreq_data *wrqu, char *ssid)
1531 {
1532 	struct iw_point *data = &wrqu->data;
1533 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1534 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1535 	int ret;
1536 
1537 	data->flags = 0;
1538 	data->length = 0;
1539 
1540 	wiphy_lock(&rdev->wiphy);
1541 	switch (wdev->iftype) {
1542 	case NL80211_IFTYPE_ADHOC:
1543 		ret = cfg80211_ibss_wext_giwessid(dev, info, data, ssid);
1544 		break;
1545 	case NL80211_IFTYPE_STATION:
1546 		ret = cfg80211_mgd_wext_giwessid(dev, info, data, ssid);
1547 		break;
1548 	default:
1549 		ret = -EOPNOTSUPP;
1550 		break;
1551 	}
1552 	wiphy_unlock(&rdev->wiphy);
1553 
1554 	return ret;
1555 }
1556 
cfg80211_wext_siwpmksa(struct net_device * dev,struct iw_request_info * info,union iwreq_data * wrqu,char * extra)1557 static int cfg80211_wext_siwpmksa(struct net_device *dev,
1558 				  struct iw_request_info *info,
1559 				  union iwreq_data *wrqu, char *extra)
1560 {
1561 	struct wireless_dev *wdev = dev->ieee80211_ptr;
1562 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1563 	struct cfg80211_pmksa cfg_pmksa;
1564 	struct iw_pmksa *pmksa = (struct iw_pmksa *)extra;
1565 	int ret;
1566 
1567 	memset(&cfg_pmksa, 0, sizeof(struct cfg80211_pmksa));
1568 
1569 	if (wdev->iftype != NL80211_IFTYPE_STATION)
1570 		return -EINVAL;
1571 
1572 	cfg_pmksa.bssid = pmksa->bssid.sa_data;
1573 	cfg_pmksa.pmkid = pmksa->pmkid;
1574 
1575 	wiphy_lock(&rdev->wiphy);
1576 	switch (pmksa->cmd) {
1577 	case IW_PMKSA_ADD:
1578 		if (!rdev->ops->set_pmksa) {
1579 			ret = -EOPNOTSUPP;
1580 			break;
1581 		}
1582 
1583 		ret = rdev_set_pmksa(rdev, dev, &cfg_pmksa);
1584 		break;
1585 	case IW_PMKSA_REMOVE:
1586 		if (!rdev->ops->del_pmksa) {
1587 			ret = -EOPNOTSUPP;
1588 			break;
1589 		}
1590 
1591 		ret = rdev_del_pmksa(rdev, dev, &cfg_pmksa);
1592 		break;
1593 	case IW_PMKSA_FLUSH:
1594 		if (!rdev->ops->flush_pmksa) {
1595 			ret = -EOPNOTSUPP;
1596 			break;
1597 		}
1598 
1599 		ret = rdev_flush_pmksa(rdev, dev);
1600 		break;
1601 	default:
1602 		ret = -EOPNOTSUPP;
1603 		break;
1604 	}
1605 	wiphy_unlock(&rdev->wiphy);
1606 
1607 	return ret;
1608 }
1609 
1610 static const iw_handler cfg80211_handlers[] = {
1611 	IW_HANDLER(SIOCGIWNAME,		cfg80211_wext_giwname),
1612 	IW_HANDLER(SIOCSIWFREQ,		cfg80211_wext_siwfreq),
1613 	IW_HANDLER(SIOCGIWFREQ,		cfg80211_wext_giwfreq),
1614 	IW_HANDLER(SIOCSIWMODE,		cfg80211_wext_siwmode),
1615 	IW_HANDLER(SIOCGIWMODE,		cfg80211_wext_giwmode),
1616 	IW_HANDLER(SIOCGIWRANGE,	cfg80211_wext_giwrange),
1617 	IW_HANDLER(SIOCSIWAP,		cfg80211_wext_siwap),
1618 	IW_HANDLER(SIOCGIWAP,		cfg80211_wext_giwap),
1619 	IW_HANDLER(SIOCSIWMLME,		cfg80211_wext_siwmlme),
1620 	IW_HANDLER(SIOCSIWSCAN,		cfg80211_wext_siwscan),
1621 	IW_HANDLER(SIOCGIWSCAN,		cfg80211_wext_giwscan),
1622 	IW_HANDLER(SIOCSIWESSID,	cfg80211_wext_siwessid),
1623 	IW_HANDLER(SIOCGIWESSID,	cfg80211_wext_giwessid),
1624 	IW_HANDLER(SIOCSIWRATE,		cfg80211_wext_siwrate),
1625 	IW_HANDLER(SIOCGIWRATE,		cfg80211_wext_giwrate),
1626 	IW_HANDLER(SIOCSIWRTS,		cfg80211_wext_siwrts),
1627 	IW_HANDLER(SIOCGIWRTS,		cfg80211_wext_giwrts),
1628 	IW_HANDLER(SIOCSIWFRAG,		cfg80211_wext_siwfrag),
1629 	IW_HANDLER(SIOCGIWFRAG,		cfg80211_wext_giwfrag),
1630 	IW_HANDLER(SIOCSIWTXPOW,	cfg80211_wext_siwtxpower),
1631 	IW_HANDLER(SIOCGIWTXPOW,	cfg80211_wext_giwtxpower),
1632 	IW_HANDLER(SIOCSIWRETRY,	cfg80211_wext_siwretry),
1633 	IW_HANDLER(SIOCGIWRETRY,	cfg80211_wext_giwretry),
1634 	IW_HANDLER(SIOCSIWENCODE,	cfg80211_wext_siwencode),
1635 	IW_HANDLER(SIOCGIWENCODE,	cfg80211_wext_giwencode),
1636 	IW_HANDLER(SIOCSIWPOWER,	cfg80211_wext_siwpower),
1637 	IW_HANDLER(SIOCGIWPOWER,	cfg80211_wext_giwpower),
1638 	IW_HANDLER(SIOCSIWGENIE,	cfg80211_wext_siwgenie),
1639 	IW_HANDLER(SIOCSIWAUTH,		cfg80211_wext_siwauth),
1640 	IW_HANDLER(SIOCGIWAUTH,		cfg80211_wext_giwauth),
1641 	IW_HANDLER(SIOCSIWENCODEEXT,	cfg80211_wext_siwencodeext),
1642 	IW_HANDLER(SIOCSIWPMKSA,	cfg80211_wext_siwpmksa),
1643 };
1644 
1645 const struct iw_handler_def cfg80211_wext_handler = {
1646 	.num_standard		= ARRAY_SIZE(cfg80211_handlers),
1647 	.standard		= cfg80211_handlers,
1648 	.get_wireless_stats = cfg80211_wireless_stats,
1649 };
1650