xref: /openbmc/linux/net/wireless/nl80211.c (revision 9ac8d3fb) 
1 /*
2  * This is the new netlink-based wireless configuration interface.
3  *
4  * Copyright 2006, 2007	Johannes Berg <johannes@sipsolutions.net>
5  */
6 
7 #include <linux/if.h>
8 #include <linux/module.h>
9 #include <linux/err.h>
10 #include <linux/mutex.h>
11 #include <linux/list.h>
12 #include <linux/if_ether.h>
13 #include <linux/ieee80211.h>
14 #include <linux/nl80211.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/netlink.h>
17 #include <net/genetlink.h>
18 #include <net/cfg80211.h>
19 #include "core.h"
20 #include "nl80211.h"
21 #include "reg.h"
22 
23 /* the netlink family */
24 static struct genl_family nl80211_fam = {
25 	.id = GENL_ID_GENERATE,	/* don't bother with a hardcoded ID */
26 	.name = "nl80211",	/* have users key off the name instead */
27 	.hdrsize = 0,		/* no private header */
28 	.version = 1,		/* no particular meaning now */
29 	.maxattr = NL80211_ATTR_MAX,
30 };
31 
32 /* internal helper: get drv and dev */
33 static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
34 				       struct cfg80211_registered_device **drv,
35 				       struct net_device **dev)
36 {
37 	int ifindex;
38 
39 	if (!attrs[NL80211_ATTR_IFINDEX])
40 		return -EINVAL;
41 
42 	ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
43 	*dev = dev_get_by_index(&init_net, ifindex);
44 	if (!*dev)
45 		return -ENODEV;
46 
47 	*drv = cfg80211_get_dev_from_ifindex(ifindex);
48 	if (IS_ERR(*drv)) {
49 		dev_put(*dev);
50 		return PTR_ERR(*drv);
51 	}
52 
53 	return 0;
54 }
55 
56 /* policy for the attributes */
57 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
58 	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
59 	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
60 				      .len = BUS_ID_SIZE-1 },
61 
62 	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
63 	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
64 	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
65 
66 	[NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
67 
68 	[NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
69 				    .len = WLAN_MAX_KEY_LEN },
70 	[NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
71 	[NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
72 	[NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
73 
74 	[NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
75 	[NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
76 	[NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
77 				       .len = IEEE80211_MAX_DATA_LEN },
78 	[NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
79 				       .len = IEEE80211_MAX_DATA_LEN },
80 	[NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
81 	[NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
82 	[NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
83 	[NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
84 					       .len = NL80211_MAX_SUPP_RATES },
85 	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
86 	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
87 	[NL80211_ATTR_MNTR_FLAGS] = { .type = NLA_NESTED },
88 	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
89 				.len = IEEE80211_MAX_MESH_ID_LEN },
90 	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
91 
92 	[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
93 	[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
94 
95 	[NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
96 	[NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
97 	[NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
98 
99 	[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
100 					 .len = NL80211_HT_CAPABILITY_LEN },
101 };
102 
103 /* message building helper */
104 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
105 				   int flags, u8 cmd)
106 {
107 	/* since there is no private header just add the generic one */
108 	return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
109 }
110 
111 /* netlink command implementations */
112 
113 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
114 			      struct cfg80211_registered_device *dev)
115 {
116 	void *hdr;
117 	struct nlattr *nl_bands, *nl_band;
118 	struct nlattr *nl_freqs, *nl_freq;
119 	struct nlattr *nl_rates, *nl_rate;
120 	struct nlattr *nl_modes;
121 	enum ieee80211_band band;
122 	struct ieee80211_channel *chan;
123 	struct ieee80211_rate *rate;
124 	int i;
125 	u16 ifmodes = dev->wiphy.interface_modes;
126 
127 	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
128 	if (!hdr)
129 		return -1;
130 
131 	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx);
132 	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
133 
134 	nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
135 	if (!nl_modes)
136 		goto nla_put_failure;
137 
138 	i = 0;
139 	while (ifmodes) {
140 		if (ifmodes & 1)
141 			NLA_PUT_FLAG(msg, i);
142 		ifmodes >>= 1;
143 		i++;
144 	}
145 
146 	nla_nest_end(msg, nl_modes);
147 
148 	nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
149 	if (!nl_bands)
150 		goto nla_put_failure;
151 
152 	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
153 		if (!dev->wiphy.bands[band])
154 			continue;
155 
156 		nl_band = nla_nest_start(msg, band);
157 		if (!nl_band)
158 			goto nla_put_failure;
159 
160 		/* add frequencies */
161 		nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
162 		if (!nl_freqs)
163 			goto nla_put_failure;
164 
165 		for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
166 			nl_freq = nla_nest_start(msg, i);
167 			if (!nl_freq)
168 				goto nla_put_failure;
169 
170 			chan = &dev->wiphy.bands[band]->channels[i];
171 			NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
172 				    chan->center_freq);
173 
174 			if (chan->flags & IEEE80211_CHAN_DISABLED)
175 				NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
176 			if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
177 				NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
178 			if (chan->flags & IEEE80211_CHAN_NO_IBSS)
179 				NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
180 			if (chan->flags & IEEE80211_CHAN_RADAR)
181 				NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
182 
183 			nla_nest_end(msg, nl_freq);
184 		}
185 
186 		nla_nest_end(msg, nl_freqs);
187 
188 		/* add bitrates */
189 		nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
190 		if (!nl_rates)
191 			goto nla_put_failure;
192 
193 		for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
194 			nl_rate = nla_nest_start(msg, i);
195 			if (!nl_rate)
196 				goto nla_put_failure;
197 
198 			rate = &dev->wiphy.bands[band]->bitrates[i];
199 			NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
200 				    rate->bitrate);
201 			if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
202 				NLA_PUT_FLAG(msg,
203 					NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
204 
205 			nla_nest_end(msg, nl_rate);
206 		}
207 
208 		nla_nest_end(msg, nl_rates);
209 
210 		nla_nest_end(msg, nl_band);
211 	}
212 	nla_nest_end(msg, nl_bands);
213 
214 	return genlmsg_end(msg, hdr);
215 
216  nla_put_failure:
217 	genlmsg_cancel(msg, hdr);
218 	return -EMSGSIZE;
219 }
220 
221 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
222 {
223 	int idx = 0;
224 	int start = cb->args[0];
225 	struct cfg80211_registered_device *dev;
226 
227 	mutex_lock(&cfg80211_drv_mutex);
228 	list_for_each_entry(dev, &cfg80211_drv_list, list) {
229 		if (++idx <= start)
230 			continue;
231 		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
232 				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
233 				       dev) < 0) {
234 			idx--;
235 			break;
236 		}
237 	}
238 	mutex_unlock(&cfg80211_drv_mutex);
239 
240 	cb->args[0] = idx;
241 
242 	return skb->len;
243 }
244 
245 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
246 {
247 	struct sk_buff *msg;
248 	struct cfg80211_registered_device *dev;
249 
250 	dev = cfg80211_get_dev_from_info(info);
251 	if (IS_ERR(dev))
252 		return PTR_ERR(dev);
253 
254 	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
255 	if (!msg)
256 		goto out_err;
257 
258 	if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
259 		goto out_free;
260 
261 	cfg80211_put_dev(dev);
262 
263 	return genlmsg_unicast(msg, info->snd_pid);
264 
265  out_free:
266 	nlmsg_free(msg);
267  out_err:
268 	cfg80211_put_dev(dev);
269 	return -ENOBUFS;
270 }
271 
272 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
273 {
274 	struct cfg80211_registered_device *rdev;
275 	int result;
276 
277 	if (!info->attrs[NL80211_ATTR_WIPHY_NAME])
278 		return -EINVAL;
279 
280 	rdev = cfg80211_get_dev_from_info(info);
281 	if (IS_ERR(rdev))
282 		return PTR_ERR(rdev);
283 
284 	result = cfg80211_dev_rename(rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
285 
286 	cfg80211_put_dev(rdev);
287 	return result;
288 }
289 
290 
291 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
292 			      struct net_device *dev)
293 {
294 	void *hdr;
295 
296 	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
297 	if (!hdr)
298 		return -1;
299 
300 	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
301 	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
302 	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
303 	return genlmsg_end(msg, hdr);
304 
305  nla_put_failure:
306 	genlmsg_cancel(msg, hdr);
307 	return -EMSGSIZE;
308 }
309 
310 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
311 {
312 	int wp_idx = 0;
313 	int if_idx = 0;
314 	int wp_start = cb->args[0];
315 	int if_start = cb->args[1];
316 	struct cfg80211_registered_device *dev;
317 	struct wireless_dev *wdev;
318 
319 	mutex_lock(&cfg80211_drv_mutex);
320 	list_for_each_entry(dev, &cfg80211_drv_list, list) {
321 		if (wp_idx < wp_start) {
322 			wp_idx++;
323 			continue;
324 		}
325 		if_idx = 0;
326 
327 		mutex_lock(&dev->devlist_mtx);
328 		list_for_each_entry(wdev, &dev->netdev_list, list) {
329 			if (if_idx < if_start) {
330 				if_idx++;
331 				continue;
332 			}
333 			if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
334 					       cb->nlh->nlmsg_seq, NLM_F_MULTI,
335 					       wdev->netdev) < 0) {
336 				mutex_unlock(&dev->devlist_mtx);
337 				goto out;
338 			}
339 			if_idx++;
340 		}
341 		mutex_unlock(&dev->devlist_mtx);
342 
343 		wp_idx++;
344 	}
345  out:
346 	mutex_unlock(&cfg80211_drv_mutex);
347 
348 	cb->args[0] = wp_idx;
349 	cb->args[1] = if_idx;
350 
351 	return skb->len;
352 }
353 
354 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
355 {
356 	struct sk_buff *msg;
357 	struct cfg80211_registered_device *dev;
358 	struct net_device *netdev;
359 	int err;
360 
361 	err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
362 	if (err)
363 		return err;
364 
365 	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
366 	if (!msg)
367 		goto out_err;
368 
369 	if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
370 		goto out_free;
371 
372 	dev_put(netdev);
373 	cfg80211_put_dev(dev);
374 
375 	return genlmsg_unicast(msg, info->snd_pid);
376 
377  out_free:
378 	nlmsg_free(msg);
379  out_err:
380 	dev_put(netdev);
381 	cfg80211_put_dev(dev);
382 	return -ENOBUFS;
383 }
384 
385 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
386 	[NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
387 	[NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
388 	[NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
389 	[NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
390 	[NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
391 };
392 
393 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
394 {
395 	struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
396 	int flag;
397 
398 	*mntrflags = 0;
399 
400 	if (!nla)
401 		return -EINVAL;
402 
403 	if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
404 			     nla, mntr_flags_policy))
405 		return -EINVAL;
406 
407 	for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
408 		if (flags[flag])
409 			*mntrflags |= (1<<flag);
410 
411 	return 0;
412 }
413 
414 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
415 {
416 	struct cfg80211_registered_device *drv;
417 	struct vif_params params;
418 	int err, ifindex;
419 	enum nl80211_iftype type;
420 	struct net_device *dev;
421 	u32 _flags, *flags = NULL;
422 
423 	memset(&params, 0, sizeof(params));
424 
425 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
426 	if (err)
427 		return err;
428 	ifindex = dev->ifindex;
429 	type = dev->ieee80211_ptr->iftype;
430 	dev_put(dev);
431 
432 	err = -EINVAL;
433 	if (info->attrs[NL80211_ATTR_IFTYPE]) {
434 		type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
435 		if (type > NL80211_IFTYPE_MAX)
436 			goto unlock;
437 	}
438 
439 	if (!drv->ops->change_virtual_intf ||
440 	    !(drv->wiphy.interface_modes & (1 << type))) {
441 		err = -EOPNOTSUPP;
442 		goto unlock;
443 	}
444 
445 	if (info->attrs[NL80211_ATTR_MESH_ID]) {
446 		if (type != NL80211_IFTYPE_MESH_POINT) {
447 			err = -EINVAL;
448 			goto unlock;
449 		}
450 		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
451 		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
452 	}
453 
454 	if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
455 		if (type != NL80211_IFTYPE_MONITOR) {
456 			err = -EINVAL;
457 			goto unlock;
458 		}
459 		err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
460 					  &_flags);
461 		if (!err)
462 			flags = &_flags;
463 	}
464 	rtnl_lock();
465 	err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
466 					    type, flags, &params);
467 
468 	dev = __dev_get_by_index(&init_net, ifindex);
469 	WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));
470 
471 	rtnl_unlock();
472 
473  unlock:
474 	cfg80211_put_dev(drv);
475 	return err;
476 }
477 
478 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
479 {
480 	struct cfg80211_registered_device *drv;
481 	struct vif_params params;
482 	int err;
483 	enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
484 	u32 flags;
485 
486 	memset(&params, 0, sizeof(params));
487 
488 	if (!info->attrs[NL80211_ATTR_IFNAME])
489 		return -EINVAL;
490 
491 	if (info->attrs[NL80211_ATTR_IFTYPE]) {
492 		type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
493 		if (type > NL80211_IFTYPE_MAX)
494 			return -EINVAL;
495 	}
496 
497 	drv = cfg80211_get_dev_from_info(info);
498 	if (IS_ERR(drv))
499 		return PTR_ERR(drv);
500 
501 	if (!drv->ops->add_virtual_intf ||
502 	    !(drv->wiphy.interface_modes & (1 << type))) {
503 		err = -EOPNOTSUPP;
504 		goto unlock;
505 	}
506 
507 	if (type == NL80211_IFTYPE_MESH_POINT &&
508 	    info->attrs[NL80211_ATTR_MESH_ID]) {
509 		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
510 		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
511 	}
512 
513 	rtnl_lock();
514 	err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
515 				  info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
516 				  &flags);
517 	err = drv->ops->add_virtual_intf(&drv->wiphy,
518 		nla_data(info->attrs[NL80211_ATTR_IFNAME]),
519 		type, err ? NULL : &flags, &params);
520 	rtnl_unlock();
521 
522 
523  unlock:
524 	cfg80211_put_dev(drv);
525 	return err;
526 }
527 
528 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
529 {
530 	struct cfg80211_registered_device *drv;
531 	int ifindex, err;
532 	struct net_device *dev;
533 
534 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
535 	if (err)
536 		return err;
537 	ifindex = dev->ifindex;
538 	dev_put(dev);
539 
540 	if (!drv->ops->del_virtual_intf) {
541 		err = -EOPNOTSUPP;
542 		goto out;
543 	}
544 
545 	rtnl_lock();
546 	err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
547 	rtnl_unlock();
548 
549  out:
550 	cfg80211_put_dev(drv);
551 	return err;
552 }
553 
554 struct get_key_cookie {
555 	struct sk_buff *msg;
556 	int error;
557 };
558 
559 static void get_key_callback(void *c, struct key_params *params)
560 {
561 	struct get_key_cookie *cookie = c;
562 
563 	if (params->key)
564 		NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
565 			params->key_len, params->key);
566 
567 	if (params->seq)
568 		NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
569 			params->seq_len, params->seq);
570 
571 	if (params->cipher)
572 		NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
573 			    params->cipher);
574 
575 	return;
576  nla_put_failure:
577 	cookie->error = 1;
578 }
579 
580 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
581 {
582 	struct cfg80211_registered_device *drv;
583 	int err;
584 	struct net_device *dev;
585 	u8 key_idx = 0;
586 	u8 *mac_addr = NULL;
587 	struct get_key_cookie cookie = {
588 		.error = 0,
589 	};
590 	void *hdr;
591 	struct sk_buff *msg;
592 
593 	if (info->attrs[NL80211_ATTR_KEY_IDX])
594 		key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
595 
596 	if (key_idx > 3)
597 		return -EINVAL;
598 
599 	if (info->attrs[NL80211_ATTR_MAC])
600 		mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
601 
602 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
603 	if (err)
604 		return err;
605 
606 	if (!drv->ops->get_key) {
607 		err = -EOPNOTSUPP;
608 		goto out;
609 	}
610 
611 	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
612 	if (!msg) {
613 		err = -ENOMEM;
614 		goto out;
615 	}
616 
617 	hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
618 			     NL80211_CMD_NEW_KEY);
619 
620 	if (IS_ERR(hdr)) {
621 		err = PTR_ERR(hdr);
622 		goto out;
623 	}
624 
625 	cookie.msg = msg;
626 
627 	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
628 	NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
629 	if (mac_addr)
630 		NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
631 
632 	rtnl_lock();
633 	err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
634 				&cookie, get_key_callback);
635 	rtnl_unlock();
636 
637 	if (err)
638 		goto out;
639 
640 	if (cookie.error)
641 		goto nla_put_failure;
642 
643 	genlmsg_end(msg, hdr);
644 	err = genlmsg_unicast(msg, info->snd_pid);
645 	goto out;
646 
647  nla_put_failure:
648 	err = -ENOBUFS;
649 	nlmsg_free(msg);
650  out:
651 	cfg80211_put_dev(drv);
652 	dev_put(dev);
653 	return err;
654 }
655 
656 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
657 {
658 	struct cfg80211_registered_device *drv;
659 	int err;
660 	struct net_device *dev;
661 	u8 key_idx;
662 
663 	if (!info->attrs[NL80211_ATTR_KEY_IDX])
664 		return -EINVAL;
665 
666 	key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
667 
668 	if (key_idx > 3)
669 		return -EINVAL;
670 
671 	/* currently only support setting default key */
672 	if (!info->attrs[NL80211_ATTR_KEY_DEFAULT])
673 		return -EINVAL;
674 
675 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
676 	if (err)
677 		return err;
678 
679 	if (!drv->ops->set_default_key) {
680 		err = -EOPNOTSUPP;
681 		goto out;
682 	}
683 
684 	rtnl_lock();
685 	err = drv->ops->set_default_key(&drv->wiphy, dev, key_idx);
686 	rtnl_unlock();
687 
688  out:
689 	cfg80211_put_dev(drv);
690 	dev_put(dev);
691 	return err;
692 }
693 
694 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
695 {
696 	struct cfg80211_registered_device *drv;
697 	int err;
698 	struct net_device *dev;
699 	struct key_params params;
700 	u8 key_idx = 0;
701 	u8 *mac_addr = NULL;
702 
703 	memset(&params, 0, sizeof(params));
704 
705 	if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
706 		return -EINVAL;
707 
708 	if (info->attrs[NL80211_ATTR_KEY_DATA]) {
709 		params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
710 		params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
711 	}
712 
713 	if (info->attrs[NL80211_ATTR_KEY_IDX])
714 		key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
715 
716 	params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
717 
718 	if (info->attrs[NL80211_ATTR_MAC])
719 		mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
720 
721 	if (key_idx > 3)
722 		return -EINVAL;
723 
724 	/*
725 	 * Disallow pairwise keys with non-zero index unless it's WEP
726 	 * (because current deployments use pairwise WEP keys with
727 	 * non-zero indizes but 802.11i clearly specifies to use zero)
728 	 */
729 	if (mac_addr && key_idx &&
730 	    params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
731 	    params.cipher != WLAN_CIPHER_SUITE_WEP104)
732 		return -EINVAL;
733 
734 	/* TODO: add definitions for the lengths to linux/ieee80211.h */
735 	switch (params.cipher) {
736 	case WLAN_CIPHER_SUITE_WEP40:
737 		if (params.key_len != 5)
738 			return -EINVAL;
739 		break;
740 	case WLAN_CIPHER_SUITE_TKIP:
741 		if (params.key_len != 32)
742 			return -EINVAL;
743 		break;
744 	case WLAN_CIPHER_SUITE_CCMP:
745 		if (params.key_len != 16)
746 			return -EINVAL;
747 		break;
748 	case WLAN_CIPHER_SUITE_WEP104:
749 		if (params.key_len != 13)
750 			return -EINVAL;
751 		break;
752 	default:
753 		return -EINVAL;
754 	}
755 
756 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
757 	if (err)
758 		return err;
759 
760 	if (!drv->ops->add_key) {
761 		err = -EOPNOTSUPP;
762 		goto out;
763 	}
764 
765 	rtnl_lock();
766 	err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
767 	rtnl_unlock();
768 
769  out:
770 	cfg80211_put_dev(drv);
771 	dev_put(dev);
772 	return err;
773 }
774 
775 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
776 {
777 	struct cfg80211_registered_device *drv;
778 	int err;
779 	struct net_device *dev;
780 	u8 key_idx = 0;
781 	u8 *mac_addr = NULL;
782 
783 	if (info->attrs[NL80211_ATTR_KEY_IDX])
784 		key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
785 
786 	if (key_idx > 3)
787 		return -EINVAL;
788 
789 	if (info->attrs[NL80211_ATTR_MAC])
790 		mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
791 
792 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
793 	if (err)
794 		return err;
795 
796 	if (!drv->ops->del_key) {
797 		err = -EOPNOTSUPP;
798 		goto out;
799 	}
800 
801 	rtnl_lock();
802 	err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
803 	rtnl_unlock();
804 
805  out:
806 	cfg80211_put_dev(drv);
807 	dev_put(dev);
808 	return err;
809 }
810 
811 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
812 {
813         int (*call)(struct wiphy *wiphy, struct net_device *dev,
814 		    struct beacon_parameters *info);
815 	struct cfg80211_registered_device *drv;
816 	int err;
817 	struct net_device *dev;
818 	struct beacon_parameters params;
819 	int haveinfo = 0;
820 
821 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
822 	if (err)
823 		return err;
824 
825 	switch (info->genlhdr->cmd) {
826 	case NL80211_CMD_NEW_BEACON:
827 		/* these are required for NEW_BEACON */
828 		if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
829 		    !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
830 		    !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
831 			err = -EINVAL;
832 			goto out;
833 		}
834 
835 		call = drv->ops->add_beacon;
836 		break;
837 	case NL80211_CMD_SET_BEACON:
838 		call = drv->ops->set_beacon;
839 		break;
840 	default:
841 		WARN_ON(1);
842 		err = -EOPNOTSUPP;
843 		goto out;
844 	}
845 
846 	if (!call) {
847 		err = -EOPNOTSUPP;
848 		goto out;
849 	}
850 
851 	memset(&params, 0, sizeof(params));
852 
853 	if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
854 		params.interval =
855 		    nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
856 		haveinfo = 1;
857 	}
858 
859 	if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
860 		params.dtim_period =
861 		    nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
862 		haveinfo = 1;
863 	}
864 
865 	if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
866 		params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
867 		params.head_len =
868 		    nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
869 		haveinfo = 1;
870 	}
871 
872 	if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
873 		params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
874 		params.tail_len =
875 		    nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
876 		haveinfo = 1;
877 	}
878 
879 	if (!haveinfo) {
880 		err = -EINVAL;
881 		goto out;
882 	}
883 
884 	rtnl_lock();
885 	err = call(&drv->wiphy, dev, &params);
886 	rtnl_unlock();
887 
888  out:
889 	cfg80211_put_dev(drv);
890 	dev_put(dev);
891 	return err;
892 }
893 
894 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
895 {
896 	struct cfg80211_registered_device *drv;
897 	int err;
898 	struct net_device *dev;
899 
900 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
901 	if (err)
902 		return err;
903 
904 	if (!drv->ops->del_beacon) {
905 		err = -EOPNOTSUPP;
906 		goto out;
907 	}
908 
909 	rtnl_lock();
910 	err = drv->ops->del_beacon(&drv->wiphy, dev);
911 	rtnl_unlock();
912 
913  out:
914 	cfg80211_put_dev(drv);
915 	dev_put(dev);
916 	return err;
917 }
918 
919 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
920 	[NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
921 	[NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
922 	[NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
923 };
924 
925 static int parse_station_flags(struct nlattr *nla, u32 *staflags)
926 {
927 	struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
928 	int flag;
929 
930 	*staflags = 0;
931 
932 	if (!nla)
933 		return 0;
934 
935 	if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
936 			     nla, sta_flags_policy))
937 		return -EINVAL;
938 
939 	*staflags = STATION_FLAG_CHANGED;
940 
941 	for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
942 		if (flags[flag])
943 			*staflags |= (1<<flag);
944 
945 	return 0;
946 }
947 
948 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
949 				int flags, struct net_device *dev,
950 				u8 *mac_addr, struct station_info *sinfo)
951 {
952 	void *hdr;
953 	struct nlattr *sinfoattr;
954 
955 	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
956 	if (!hdr)
957 		return -1;
958 
959 	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
960 	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
961 
962 	sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
963 	if (!sinfoattr)
964 		goto nla_put_failure;
965 	if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
966 		NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
967 			    sinfo->inactive_time);
968 	if (sinfo->filled & STATION_INFO_RX_BYTES)
969 		NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
970 			    sinfo->rx_bytes);
971 	if (sinfo->filled & STATION_INFO_TX_BYTES)
972 		NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
973 			    sinfo->tx_bytes);
974 	if (sinfo->filled & STATION_INFO_LLID)
975 		NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
976 			    sinfo->llid);
977 	if (sinfo->filled & STATION_INFO_PLID)
978 		NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
979 			    sinfo->plid);
980 	if (sinfo->filled & STATION_INFO_PLINK_STATE)
981 		NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
982 			    sinfo->plink_state);
983 
984 	nla_nest_end(msg, sinfoattr);
985 
986 	return genlmsg_end(msg, hdr);
987 
988  nla_put_failure:
989 	genlmsg_cancel(msg, hdr);
990 	return -EMSGSIZE;
991 }
992 
993 static int nl80211_dump_station(struct sk_buff *skb,
994 				struct netlink_callback *cb)
995 {
996 	struct station_info sinfo;
997 	struct cfg80211_registered_device *dev;
998 	struct net_device *netdev;
999 	u8 mac_addr[ETH_ALEN];
1000 	int ifidx = cb->args[0];
1001 	int sta_idx = cb->args[1];
1002 	int err;
1003 
1004 	if (!ifidx) {
1005 		err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1006 				  nl80211_fam.attrbuf, nl80211_fam.maxattr,
1007 				  nl80211_policy);
1008 		if (err)
1009 			return err;
1010 
1011 		if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1012 			return -EINVAL;
1013 
1014 		ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1015 		if (!ifidx)
1016 			return -EINVAL;
1017 	}
1018 
1019 	netdev = dev_get_by_index(&init_net, ifidx);
1020 	if (!netdev)
1021 		return -ENODEV;
1022 
1023 	dev = cfg80211_get_dev_from_ifindex(ifidx);
1024 	if (IS_ERR(dev)) {
1025 		err = PTR_ERR(dev);
1026 		goto out_put_netdev;
1027 	}
1028 
1029 	if (!dev->ops->dump_station) {
1030 		err = -ENOSYS;
1031 		goto out_err;
1032 	}
1033 
1034 	rtnl_lock();
1035 
1036 	while (1) {
1037 		err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1038 					     mac_addr, &sinfo);
1039 		if (err == -ENOENT)
1040 			break;
1041 		if (err)
1042 			goto out_err_rtnl;
1043 
1044 		if (nl80211_send_station(skb,
1045 				NETLINK_CB(cb->skb).pid,
1046 				cb->nlh->nlmsg_seq, NLM_F_MULTI,
1047 				netdev, mac_addr,
1048 				&sinfo) < 0)
1049 			goto out;
1050 
1051 		sta_idx++;
1052 	}
1053 
1054 
1055  out:
1056 	cb->args[1] = sta_idx;
1057 	err = skb->len;
1058  out_err_rtnl:
1059 	rtnl_unlock();
1060  out_err:
1061 	cfg80211_put_dev(dev);
1062  out_put_netdev:
1063 	dev_put(netdev);
1064 
1065 	return err;
1066 }
1067 
1068 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1069 {
1070 	struct cfg80211_registered_device *drv;
1071 	int err;
1072 	struct net_device *dev;
1073 	struct station_info sinfo;
1074 	struct sk_buff *msg;
1075 	u8 *mac_addr = NULL;
1076 
1077 	memset(&sinfo, 0, sizeof(sinfo));
1078 
1079 	if (!info->attrs[NL80211_ATTR_MAC])
1080 		return -EINVAL;
1081 
1082 	mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1083 
1084 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1085 	if (err)
1086 		return err;
1087 
1088 	if (!drv->ops->get_station) {
1089 		err = -EOPNOTSUPP;
1090 		goto out;
1091 	}
1092 
1093 	rtnl_lock();
1094 	err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1095 	rtnl_unlock();
1096 
1097 	if (err)
1098 		goto out;
1099 
1100 	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1101 	if (!msg)
1102 		goto out;
1103 
1104 	if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1105 				 dev, mac_addr, &sinfo) < 0)
1106 		goto out_free;
1107 
1108 	err = genlmsg_unicast(msg, info->snd_pid);
1109 	goto out;
1110 
1111  out_free:
1112 	nlmsg_free(msg);
1113 
1114  out:
1115 	cfg80211_put_dev(drv);
1116 	dev_put(dev);
1117 	return err;
1118 }
1119 
1120 /*
1121  * Get vlan interface making sure it is on the right wiphy.
1122  */
1123 static int get_vlan(struct nlattr *vlanattr,
1124 		    struct cfg80211_registered_device *rdev,
1125 		    struct net_device **vlan)
1126 {
1127 	*vlan = NULL;
1128 
1129 	if (vlanattr) {
1130 		*vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1131 		if (!*vlan)
1132 			return -ENODEV;
1133 		if (!(*vlan)->ieee80211_ptr)
1134 			return -EINVAL;
1135 		if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1136 			return -EINVAL;
1137 	}
1138 	return 0;
1139 }
1140 
1141 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1142 {
1143 	struct cfg80211_registered_device *drv;
1144 	int err;
1145 	struct net_device *dev;
1146 	struct station_parameters params;
1147 	u8 *mac_addr = NULL;
1148 
1149 	memset(&params, 0, sizeof(params));
1150 
1151 	params.listen_interval = -1;
1152 
1153 	if (info->attrs[NL80211_ATTR_STA_AID])
1154 		return -EINVAL;
1155 
1156 	if (!info->attrs[NL80211_ATTR_MAC])
1157 		return -EINVAL;
1158 
1159 	mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1160 
1161 	if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1162 		params.supported_rates =
1163 			nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1164 		params.supported_rates_len =
1165 			nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1166 	}
1167 
1168 	if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1169 		params.listen_interval =
1170 		    nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1171 
1172 	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1173 		params.ht_capa =
1174 			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1175 
1176 	if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1177 				&params.station_flags))
1178 		return -EINVAL;
1179 
1180 	if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1181 		params.plink_action =
1182 		    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1183 
1184 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1185 	if (err)
1186 		return err;
1187 
1188 	err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1189 	if (err)
1190 		goto out;
1191 
1192 	if (!drv->ops->change_station) {
1193 		err = -EOPNOTSUPP;
1194 		goto out;
1195 	}
1196 
1197 	rtnl_lock();
1198 	err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1199 	rtnl_unlock();
1200 
1201  out:
1202 	if (params.vlan)
1203 		dev_put(params.vlan);
1204 	cfg80211_put_dev(drv);
1205 	dev_put(dev);
1206 	return err;
1207 }
1208 
1209 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1210 {
1211 	struct cfg80211_registered_device *drv;
1212 	int err;
1213 	struct net_device *dev;
1214 	struct station_parameters params;
1215 	u8 *mac_addr = NULL;
1216 
1217 	memset(&params, 0, sizeof(params));
1218 
1219 	if (!info->attrs[NL80211_ATTR_MAC])
1220 		return -EINVAL;
1221 
1222 	if (!info->attrs[NL80211_ATTR_STA_AID])
1223 		return -EINVAL;
1224 
1225 	if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1226 		return -EINVAL;
1227 
1228 	if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1229 		return -EINVAL;
1230 
1231 	mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1232 	params.supported_rates =
1233 		nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1234 	params.supported_rates_len =
1235 		nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1236 	params.listen_interval =
1237 		nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1238 	params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1239 	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1240 		params.ht_capa =
1241 			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1242 
1243 	if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1244 				&params.station_flags))
1245 		return -EINVAL;
1246 
1247 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1248 	if (err)
1249 		return err;
1250 
1251 	err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1252 	if (err)
1253 		goto out;
1254 
1255 	if (!drv->ops->add_station) {
1256 		err = -EOPNOTSUPP;
1257 		goto out;
1258 	}
1259 
1260 	rtnl_lock();
1261 	err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1262 	rtnl_unlock();
1263 
1264  out:
1265 	if (params.vlan)
1266 		dev_put(params.vlan);
1267 	cfg80211_put_dev(drv);
1268 	dev_put(dev);
1269 	return err;
1270 }
1271 
1272 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1273 {
1274 	struct cfg80211_registered_device *drv;
1275 	int err;
1276 	struct net_device *dev;
1277 	u8 *mac_addr = NULL;
1278 
1279 	if (info->attrs[NL80211_ATTR_MAC])
1280 		mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1281 
1282 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1283 	if (err)
1284 		return err;
1285 
1286 	if (!drv->ops->del_station) {
1287 		err = -EOPNOTSUPP;
1288 		goto out;
1289 	}
1290 
1291 	rtnl_lock();
1292 	err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1293 	rtnl_unlock();
1294 
1295  out:
1296 	cfg80211_put_dev(drv);
1297 	dev_put(dev);
1298 	return err;
1299 }
1300 
1301 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1302 				int flags, struct net_device *dev,
1303 				u8 *dst, u8 *next_hop,
1304 				struct mpath_info *pinfo)
1305 {
1306 	void *hdr;
1307 	struct nlattr *pinfoattr;
1308 
1309 	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1310 	if (!hdr)
1311 		return -1;
1312 
1313 	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1314 	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1315 	NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1316 
1317 	pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1318 	if (!pinfoattr)
1319 		goto nla_put_failure;
1320 	if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1321 		NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1322 			    pinfo->frame_qlen);
1323 	if (pinfo->filled & MPATH_INFO_DSN)
1324 		NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1325 			    pinfo->dsn);
1326 	if (pinfo->filled & MPATH_INFO_METRIC)
1327 		NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1328 			    pinfo->metric);
1329 	if (pinfo->filled & MPATH_INFO_EXPTIME)
1330 		NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1331 			    pinfo->exptime);
1332 	if (pinfo->filled & MPATH_INFO_FLAGS)
1333 		NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1334 			    pinfo->flags);
1335 	if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1336 		NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1337 			    pinfo->discovery_timeout);
1338 	if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1339 		NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1340 			    pinfo->discovery_retries);
1341 
1342 	nla_nest_end(msg, pinfoattr);
1343 
1344 	return genlmsg_end(msg, hdr);
1345 
1346  nla_put_failure:
1347 	genlmsg_cancel(msg, hdr);
1348 	return -EMSGSIZE;
1349 }
1350 
1351 static int nl80211_dump_mpath(struct sk_buff *skb,
1352 			      struct netlink_callback *cb)
1353 {
1354 	struct mpath_info pinfo;
1355 	struct cfg80211_registered_device *dev;
1356 	struct net_device *netdev;
1357 	u8 dst[ETH_ALEN];
1358 	u8 next_hop[ETH_ALEN];
1359 	int ifidx = cb->args[0];
1360 	int path_idx = cb->args[1];
1361 	int err;
1362 
1363 	if (!ifidx) {
1364 		err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1365 				  nl80211_fam.attrbuf, nl80211_fam.maxattr,
1366 				  nl80211_policy);
1367 		if (err)
1368 			return err;
1369 
1370 		if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1371 			return -EINVAL;
1372 
1373 		ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1374 		if (!ifidx)
1375 			return -EINVAL;
1376 	}
1377 
1378 	netdev = dev_get_by_index(&init_net, ifidx);
1379 	if (!netdev)
1380 		return -ENODEV;
1381 
1382 	dev = cfg80211_get_dev_from_ifindex(ifidx);
1383 	if (IS_ERR(dev)) {
1384 		err = PTR_ERR(dev);
1385 		goto out_put_netdev;
1386 	}
1387 
1388 	if (!dev->ops->dump_mpath) {
1389 		err = -ENOSYS;
1390 		goto out_err;
1391 	}
1392 
1393 	rtnl_lock();
1394 
1395 	while (1) {
1396 		err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1397 					   dst, next_hop, &pinfo);
1398 		if (err == -ENOENT)
1399 			break;
1400 		if (err)
1401 			goto out_err_rtnl;
1402 
1403 		if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1404 				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
1405 				       netdev, dst, next_hop,
1406 				       &pinfo) < 0)
1407 			goto out;
1408 
1409 		path_idx++;
1410 	}
1411 
1412 
1413  out:
1414 	cb->args[1] = path_idx;
1415 	err = skb->len;
1416  out_err_rtnl:
1417 	rtnl_unlock();
1418  out_err:
1419 	cfg80211_put_dev(dev);
1420  out_put_netdev:
1421 	dev_put(netdev);
1422 
1423 	return err;
1424 }
1425 
1426 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1427 {
1428 	struct cfg80211_registered_device *drv;
1429 	int err;
1430 	struct net_device *dev;
1431 	struct mpath_info pinfo;
1432 	struct sk_buff *msg;
1433 	u8 *dst = NULL;
1434 	u8 next_hop[ETH_ALEN];
1435 
1436 	memset(&pinfo, 0, sizeof(pinfo));
1437 
1438 	if (!info->attrs[NL80211_ATTR_MAC])
1439 		return -EINVAL;
1440 
1441 	dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1442 
1443 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1444 	if (err)
1445 		return err;
1446 
1447 	if (!drv->ops->get_mpath) {
1448 		err = -EOPNOTSUPP;
1449 		goto out;
1450 	}
1451 
1452 	rtnl_lock();
1453 	err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1454 	rtnl_unlock();
1455 
1456 	if (err)
1457 		goto out;
1458 
1459 	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1460 	if (!msg)
1461 		goto out;
1462 
1463 	if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1464 				 dev, dst, next_hop, &pinfo) < 0)
1465 		goto out_free;
1466 
1467 	err = genlmsg_unicast(msg, info->snd_pid);
1468 	goto out;
1469 
1470  out_free:
1471 	nlmsg_free(msg);
1472 
1473  out:
1474 	cfg80211_put_dev(drv);
1475 	dev_put(dev);
1476 	return err;
1477 }
1478 
1479 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
1480 {
1481 	struct cfg80211_registered_device *drv;
1482 	int err;
1483 	struct net_device *dev;
1484 	u8 *dst = NULL;
1485 	u8 *next_hop = NULL;
1486 
1487 	if (!info->attrs[NL80211_ATTR_MAC])
1488 		return -EINVAL;
1489 
1490 	if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1491 		return -EINVAL;
1492 
1493 	dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1494 	next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1495 
1496 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1497 	if (err)
1498 		return err;
1499 
1500 	if (!drv->ops->change_mpath) {
1501 		err = -EOPNOTSUPP;
1502 		goto out;
1503 	}
1504 
1505 	rtnl_lock();
1506 	err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
1507 	rtnl_unlock();
1508 
1509  out:
1510 	cfg80211_put_dev(drv);
1511 	dev_put(dev);
1512 	return err;
1513 }
1514 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
1515 {
1516 	struct cfg80211_registered_device *drv;
1517 	int err;
1518 	struct net_device *dev;
1519 	u8 *dst = NULL;
1520 	u8 *next_hop = NULL;
1521 
1522 	if (!info->attrs[NL80211_ATTR_MAC])
1523 		return -EINVAL;
1524 
1525 	if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1526 		return -EINVAL;
1527 
1528 	dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1529 	next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1530 
1531 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1532 	if (err)
1533 		return err;
1534 
1535 	if (!drv->ops->add_mpath) {
1536 		err = -EOPNOTSUPP;
1537 		goto out;
1538 	}
1539 
1540 	rtnl_lock();
1541 	err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
1542 	rtnl_unlock();
1543 
1544  out:
1545 	cfg80211_put_dev(drv);
1546 	dev_put(dev);
1547 	return err;
1548 }
1549 
1550 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
1551 {
1552 	struct cfg80211_registered_device *drv;
1553 	int err;
1554 	struct net_device *dev;
1555 	u8 *dst = NULL;
1556 
1557 	if (info->attrs[NL80211_ATTR_MAC])
1558 		dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1559 
1560 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1561 	if (err)
1562 		return err;
1563 
1564 	if (!drv->ops->del_mpath) {
1565 		err = -EOPNOTSUPP;
1566 		goto out;
1567 	}
1568 
1569 	rtnl_lock();
1570 	err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
1571 	rtnl_unlock();
1572 
1573  out:
1574 	cfg80211_put_dev(drv);
1575 	dev_put(dev);
1576 	return err;
1577 }
1578 
1579 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
1580 {
1581 	struct cfg80211_registered_device *drv;
1582 	int err;
1583 	struct net_device *dev;
1584 	struct bss_parameters params;
1585 
1586 	memset(&params, 0, sizeof(params));
1587 	/* default to not changing parameters */
1588 	params.use_cts_prot = -1;
1589 	params.use_short_preamble = -1;
1590 	params.use_short_slot_time = -1;
1591 
1592 	if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
1593 		params.use_cts_prot =
1594 		    nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
1595 	if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
1596 		params.use_short_preamble =
1597 		    nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
1598 	if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
1599 		params.use_short_slot_time =
1600 		    nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
1601 
1602 	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1603 	if (err)
1604 		return err;
1605 
1606 	if (!drv->ops->change_bss) {
1607 		err = -EOPNOTSUPP;
1608 		goto out;
1609 	}
1610 
1611 	rtnl_lock();
1612 	err = drv->ops->change_bss(&drv->wiphy, dev, &params);
1613 	rtnl_unlock();
1614 
1615  out:
1616 	cfg80211_put_dev(drv);
1617 	dev_put(dev);
1618 	return err;
1619 }
1620 
1621 static const struct nla_policy
1622 	reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
1623 	[NL80211_ATTR_REG_RULE_FLAGS]		= { .type = NLA_U32 },
1624 	[NL80211_ATTR_FREQ_RANGE_START]		= { .type = NLA_U32 },
1625 	[NL80211_ATTR_FREQ_RANGE_END]		= { .type = NLA_U32 },
1626 	[NL80211_ATTR_FREQ_RANGE_MAX_BW]	= { .type = NLA_U32 },
1627 	[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]	= { .type = NLA_U32 },
1628 	[NL80211_ATTR_POWER_RULE_MAX_EIRP]	= { .type = NLA_U32 },
1629 };
1630 
1631 static int parse_reg_rule(struct nlattr *tb[],
1632 	struct ieee80211_reg_rule *reg_rule)
1633 {
1634 	struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
1635 	struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
1636 
1637 	if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
1638 		return -EINVAL;
1639 	if (!tb[NL80211_ATTR_FREQ_RANGE_START])
1640 		return -EINVAL;
1641 	if (!tb[NL80211_ATTR_FREQ_RANGE_END])
1642 		return -EINVAL;
1643 	if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
1644 		return -EINVAL;
1645 	if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
1646 		return -EINVAL;
1647 
1648 	reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
1649 
1650 	freq_range->start_freq_khz =
1651 		nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
1652 	freq_range->end_freq_khz =
1653 		nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
1654 	freq_range->max_bandwidth_khz =
1655 		nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
1656 
1657 	power_rule->max_eirp =
1658 		nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
1659 
1660 	if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
1661 		power_rule->max_antenna_gain =
1662 			nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
1663 
1664 	return 0;
1665 }
1666 
1667 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
1668 {
1669 	int r;
1670 	char *data = NULL;
1671 
1672 	if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
1673 		return -EINVAL;
1674 
1675 	data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
1676 
1677 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
1678 	/* We ignore world regdom requests with the old regdom setup */
1679 	if (is_world_regdom(data))
1680 		return -EINVAL;
1681 #endif
1682 	mutex_lock(&cfg80211_drv_mutex);
1683 	r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, NULL);
1684 	mutex_unlock(&cfg80211_drv_mutex);
1685 	return r;
1686 }
1687 
1688 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
1689 {
1690 	struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
1691 	struct nlattr *nl_reg_rule;
1692 	char *alpha2 = NULL;
1693 	int rem_reg_rules = 0, r = 0;
1694 	u32 num_rules = 0, rule_idx = 0, size_of_regd;
1695 	struct ieee80211_regdomain *rd = NULL;
1696 
1697 	if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
1698 		return -EINVAL;
1699 
1700 	if (!info->attrs[NL80211_ATTR_REG_RULES])
1701 		return -EINVAL;
1702 
1703 	alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
1704 
1705 	nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
1706 			rem_reg_rules) {
1707 		num_rules++;
1708 		if (num_rules > NL80211_MAX_SUPP_REG_RULES)
1709 			goto bad_reg;
1710 	}
1711 
1712 	if (!reg_is_valid_request(alpha2))
1713 		return -EINVAL;
1714 
1715 	size_of_regd = sizeof(struct ieee80211_regdomain) +
1716 		(num_rules * sizeof(struct ieee80211_reg_rule));
1717 
1718 	rd = kzalloc(size_of_regd, GFP_KERNEL);
1719 	if (!rd)
1720 		return -ENOMEM;
1721 
1722 	rd->n_reg_rules = num_rules;
1723 	rd->alpha2[0] = alpha2[0];
1724 	rd->alpha2[1] = alpha2[1];
1725 
1726 	nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
1727 			rem_reg_rules) {
1728 		nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
1729 			nla_data(nl_reg_rule), nla_len(nl_reg_rule),
1730 			reg_rule_policy);
1731 		r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
1732 		if (r)
1733 			goto bad_reg;
1734 
1735 		rule_idx++;
1736 
1737 		if (rule_idx > NL80211_MAX_SUPP_REG_RULES)
1738 			goto bad_reg;
1739 	}
1740 
1741 	BUG_ON(rule_idx != num_rules);
1742 
1743 	mutex_lock(&cfg80211_drv_mutex);
1744 	r = set_regdom(rd);
1745 	mutex_unlock(&cfg80211_drv_mutex);
1746 	if (r)
1747 		goto bad_reg;
1748 
1749 	return r;
1750 
1751 bad_reg:
1752 	kfree(rd);
1753 	return -EINVAL;
1754 }
1755 
1756 static struct genl_ops nl80211_ops[] = {
1757 	{
1758 		.cmd = NL80211_CMD_GET_WIPHY,
1759 		.doit = nl80211_get_wiphy,
1760 		.dumpit = nl80211_dump_wiphy,
1761 		.policy = nl80211_policy,
1762 		/* can be retrieved by unprivileged users */
1763 	},
1764 	{
1765 		.cmd = NL80211_CMD_SET_WIPHY,
1766 		.doit = nl80211_set_wiphy,
1767 		.policy = nl80211_policy,
1768 		.flags = GENL_ADMIN_PERM,
1769 	},
1770 	{
1771 		.cmd = NL80211_CMD_GET_INTERFACE,
1772 		.doit = nl80211_get_interface,
1773 		.dumpit = nl80211_dump_interface,
1774 		.policy = nl80211_policy,
1775 		/* can be retrieved by unprivileged users */
1776 	},
1777 	{
1778 		.cmd = NL80211_CMD_SET_INTERFACE,
1779 		.doit = nl80211_set_interface,
1780 		.policy = nl80211_policy,
1781 		.flags = GENL_ADMIN_PERM,
1782 	},
1783 	{
1784 		.cmd = NL80211_CMD_NEW_INTERFACE,
1785 		.doit = nl80211_new_interface,
1786 		.policy = nl80211_policy,
1787 		.flags = GENL_ADMIN_PERM,
1788 	},
1789 	{
1790 		.cmd = NL80211_CMD_DEL_INTERFACE,
1791 		.doit = nl80211_del_interface,
1792 		.policy = nl80211_policy,
1793 		.flags = GENL_ADMIN_PERM,
1794 	},
1795 	{
1796 		.cmd = NL80211_CMD_GET_KEY,
1797 		.doit = nl80211_get_key,
1798 		.policy = nl80211_policy,
1799 		.flags = GENL_ADMIN_PERM,
1800 	},
1801 	{
1802 		.cmd = NL80211_CMD_SET_KEY,
1803 		.doit = nl80211_set_key,
1804 		.policy = nl80211_policy,
1805 		.flags = GENL_ADMIN_PERM,
1806 	},
1807 	{
1808 		.cmd = NL80211_CMD_NEW_KEY,
1809 		.doit = nl80211_new_key,
1810 		.policy = nl80211_policy,
1811 		.flags = GENL_ADMIN_PERM,
1812 	},
1813 	{
1814 		.cmd = NL80211_CMD_DEL_KEY,
1815 		.doit = nl80211_del_key,
1816 		.policy = nl80211_policy,
1817 		.flags = GENL_ADMIN_PERM,
1818 	},
1819 	{
1820 		.cmd = NL80211_CMD_SET_BEACON,
1821 		.policy = nl80211_policy,
1822 		.flags = GENL_ADMIN_PERM,
1823 		.doit = nl80211_addset_beacon,
1824 	},
1825 	{
1826 		.cmd = NL80211_CMD_NEW_BEACON,
1827 		.policy = nl80211_policy,
1828 		.flags = GENL_ADMIN_PERM,
1829 		.doit = nl80211_addset_beacon,
1830 	},
1831 	{
1832 		.cmd = NL80211_CMD_DEL_BEACON,
1833 		.policy = nl80211_policy,
1834 		.flags = GENL_ADMIN_PERM,
1835 		.doit = nl80211_del_beacon,
1836 	},
1837 	{
1838 		.cmd = NL80211_CMD_GET_STATION,
1839 		.doit = nl80211_get_station,
1840 		.dumpit = nl80211_dump_station,
1841 		.policy = nl80211_policy,
1842 		.flags = GENL_ADMIN_PERM,
1843 	},
1844 	{
1845 		.cmd = NL80211_CMD_SET_STATION,
1846 		.doit = nl80211_set_station,
1847 		.policy = nl80211_policy,
1848 		.flags = GENL_ADMIN_PERM,
1849 	},
1850 	{
1851 		.cmd = NL80211_CMD_NEW_STATION,
1852 		.doit = nl80211_new_station,
1853 		.policy = nl80211_policy,
1854 		.flags = GENL_ADMIN_PERM,
1855 	},
1856 	{
1857 		.cmd = NL80211_CMD_DEL_STATION,
1858 		.doit = nl80211_del_station,
1859 		.policy = nl80211_policy,
1860 		.flags = GENL_ADMIN_PERM,
1861 	},
1862 	{
1863 		.cmd = NL80211_CMD_GET_MPATH,
1864 		.doit = nl80211_get_mpath,
1865 		.dumpit = nl80211_dump_mpath,
1866 		.policy = nl80211_policy,
1867 		.flags = GENL_ADMIN_PERM,
1868 	},
1869 	{
1870 		.cmd = NL80211_CMD_SET_MPATH,
1871 		.doit = nl80211_set_mpath,
1872 		.policy = nl80211_policy,
1873 		.flags = GENL_ADMIN_PERM,
1874 	},
1875 	{
1876 		.cmd = NL80211_CMD_NEW_MPATH,
1877 		.doit = nl80211_new_mpath,
1878 		.policy = nl80211_policy,
1879 		.flags = GENL_ADMIN_PERM,
1880 	},
1881 	{
1882 		.cmd = NL80211_CMD_DEL_MPATH,
1883 		.doit = nl80211_del_mpath,
1884 		.policy = nl80211_policy,
1885 		.flags = GENL_ADMIN_PERM,
1886 	},
1887 	{
1888 		.cmd = NL80211_CMD_SET_BSS,
1889 		.doit = nl80211_set_bss,
1890 		.policy = nl80211_policy,
1891 		.flags = GENL_ADMIN_PERM,
1892 	},
1893 	{
1894 		.cmd = NL80211_CMD_SET_REG,
1895 		.doit = nl80211_set_reg,
1896 		.policy = nl80211_policy,
1897 		.flags = GENL_ADMIN_PERM,
1898 	},
1899 	{
1900 		.cmd = NL80211_CMD_REQ_SET_REG,
1901 		.doit = nl80211_req_set_reg,
1902 		.policy = nl80211_policy,
1903 		.flags = GENL_ADMIN_PERM,
1904 	},
1905 };
1906 
1907 /* multicast groups */
1908 static struct genl_multicast_group nl80211_config_mcgrp = {
1909 	.name = "config",
1910 };
1911 
1912 /* notification functions */
1913 
1914 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
1915 {
1916 	struct sk_buff *msg;
1917 
1918 	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1919 	if (!msg)
1920 		return;
1921 
1922 	if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
1923 		nlmsg_free(msg);
1924 		return;
1925 	}
1926 
1927 	genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
1928 }
1929 
1930 /* initialisation/exit functions */
1931 
1932 int nl80211_init(void)
1933 {
1934 	int err, i;
1935 
1936 	err = genl_register_family(&nl80211_fam);
1937 	if (err)
1938 		return err;
1939 
1940 	for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
1941 		err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
1942 		if (err)
1943 			goto err_out;
1944 	}
1945 
1946 	err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
1947 	if (err)
1948 		goto err_out;
1949 
1950 	return 0;
1951  err_out:
1952 	genl_unregister_family(&nl80211_fam);
1953 	return err;
1954 }
1955 
1956 void nl80211_exit(void)
1957 {
1958 	genl_unregister_family(&nl80211_fam);
1959 }
1960