nl80211.c 157 KB
Newer Older
1
2
3
/*
 * This is the new netlink-based wireless configuration interface.
 *
4
 * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
5
6
7
8
9
 */

#include <linux/if.h>
#include <linux/module.h>
#include <linux/err.h>
10
#include <linux/slab.h>
11
12
13
14
15
16
#include <linux/list.h>
#include <linux/if_ether.h>
#include <linux/ieee80211.h>
#include <linux/nl80211.h>
#include <linux/rtnetlink.h>
#include <linux/netlink.h>
17
#include <linux/etherdevice.h>
18
#include <net/net_namespace.h>
19
20
#include <net/genetlink.h>
#include <net/cfg80211.h>
21
#include <net/sock.h>
22
23
#include "core.h"
#include "nl80211.h"
24
#include "reg.h"
25

26
27
28
29
30
static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
			    struct genl_info *info);
static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
			      struct genl_info *info);

31
32
33
34
35
36
37
/* the netlink family */
static struct genl_family nl80211_fam = {
	.id = GENL_ID_GENERATE,	/* don't bother with a hardcoded ID */
	.name = "nl80211",	/* have users key off the name instead */
	.hdrsize = 0,		/* no private header */
	.version = 1,		/* no particular meaning now */
	.maxattr = NL80211_ATTR_MAX,
38
	.netnsok = true,
39
40
	.pre_doit = nl80211_pre_doit,
	.post_doit = nl80211_post_doit,
41
42
};

43
/* internal helper: get rdev and dev */
44
static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
45
				       struct cfg80211_registered_device **rdev,
46
47
				       struct net_device **dev)
{
48
	struct nlattr **attrs = info->attrs;
49
50
	int ifindex;

Johannes Berg's avatar
Johannes Berg committed
51
	if (!attrs[NL80211_ATTR_IFINDEX])
52
53
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
54
	ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
55
	*dev = dev_get_by_index(genl_info_net(info), ifindex);
56
57
58
	if (!*dev)
		return -ENODEV;

59
	*rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
60
	if (IS_ERR(*rdev)) {
61
		dev_put(*dev);
62
		return PTR_ERR(*rdev);
63
64
65
66
67
68
	}

	return 0;
}

/* policy for the attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
69
static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
70
71
	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
72
				      .len = 20-1 },
73
	[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
74
	[NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
Sujith's avatar
Sujith committed
75
	[NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
76
77
78
79
	[NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
	[NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
	[NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
80
	[NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
81
82
83
84

	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
85
86

	[NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
87
	[NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
88

89
	[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
90
91
92
93
94
	[NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
				    .len = WLAN_MAX_KEY_LEN },
	[NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
	[NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
	[NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
95
	[NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
96
	[NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
97
98
99
100
101
102
103

	[NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
	[NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
	[NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
				       .len = IEEE80211_MAX_DATA_LEN },
	[NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
				       .len = IEEE80211_MAX_DATA_LEN },
104
105
106
107
108
	[NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
	[NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
	[NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
	[NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
					       .len = NL80211_MAX_SUPP_RATES },
109
	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
110
	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
Johannes Berg's avatar
Johannes Berg committed
111
	[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
112
113
114
	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_MESH_ID_LEN },
	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
115

116
117
118
	[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
	[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },

119
120
121
	[NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
	[NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
	[NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
122
123
	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
					   .len = NL80211_MAX_SUPP_RATES },
124
	[NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
125

126
	[NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
127

128
129
	[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
					 .len = NL80211_HT_CAPABILITY_LEN },
130
131
132
133

	[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
	[NL80211_ATTR_IE] = { .type = NLA_BINARY,
			      .len = IEEE80211_MAX_DATA_LEN },
134
135
	[NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
	[NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
136
137
138
139
140

	[NL80211_ATTR_SSID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_SSID_LEN },
	[NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
Johannes Berg's avatar
Johannes Berg committed
141
	[NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
142
	[NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
143
	[NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
144
145
146
	[NL80211_ATTR_STA_FLAGS2] = {
		.len = sizeof(struct nl80211_sta_flag_update),
	},
147
	[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
148
149
	[NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
	[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
150
151
152
	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
153
	[NL80211_ATTR_PID] = { .type = NLA_U32 },
154
	[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
Samuel Ortiz's avatar
Samuel Ortiz committed
155
156
	[NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
				 .len = WLAN_PMKID_LEN },
157
158
	[NL80211_ATTR_DURATION] = { .type = NLA_U32 },
	[NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
159
	[NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
160
161
162
	[NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
				 .len = IEEE80211_MAX_DATA_LEN },
	[NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
Kalle Valo's avatar
Kalle Valo committed
163
	[NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
164
	[NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
165
	[NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
166
	[NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
167
168
	[NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
169
	[NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
170
171
	[NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
172
	[NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
173
	[NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
174
	[NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
175
176
};

177
/* policy for the key attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
178
static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
Johannes Berg's avatar
Johannes Berg committed
179
	[NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
180
181
182
183
184
	[NL80211_KEY_IDX] = { .type = NLA_U8 },
	[NL80211_KEY_CIPHER] = { .type = NLA_U32 },
	[NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
	[NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
	[NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
185
	[NL80211_KEY_TYPE] = { .type = NLA_U32 },
186
187
188
189
190
191
192
193
	[NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
};

/* policy for the key default flags */
static const struct nla_policy
nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
	[NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
	[NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
194
195
};

196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
/* ifidx get helper */
static int nl80211_get_ifidx(struct netlink_callback *cb)
{
	int res;

	res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
			  nl80211_fam.attrbuf, nl80211_fam.maxattr,
			  nl80211_policy);
	if (res)
		return res;

	if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
		return -EINVAL;

	res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
	if (!res)
		return -EINVAL;
	return res;
}

216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
				       struct netlink_callback *cb,
				       struct cfg80211_registered_device **rdev,
				       struct net_device **dev)
{
	int ifidx = cb->args[0];
	int err;

	if (!ifidx)
		ifidx = nl80211_get_ifidx(cb);
	if (ifidx < 0)
		return ifidx;

	cb->args[0] = ifidx;

	rtnl_lock();

	*dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
	if (!*dev) {
		err = -ENODEV;
		goto out_rtnl;
	}

	*rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
240
241
	if (IS_ERR(*rdev)) {
		err = PTR_ERR(*rdev);
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
		goto out_rtnl;
	}

	return 0;
 out_rtnl:
	rtnl_unlock();
	return err;
}

static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
{
	cfg80211_unlock_rdev(rdev);
	rtnl_unlock();
}

257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
/* IE validation */
static bool is_valid_ie_attr(const struct nlattr *attr)
{
	const u8 *pos;
	int len;

	if (!attr)
		return true;

	pos = nla_data(attr);
	len = nla_len(attr);

	while (len) {
		u8 elemlen;

		if (len < 2)
			return false;
		len -= 2;

		elemlen = pos[1];
		if (elemlen > len)
			return false;

		len -= elemlen;
		pos += 2 + elemlen;
	}

	return true;
}

287
288
289
290
291
292
293
294
/* message building helper */
static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
				   int flags, u8 cmd)
{
	/* since there is no private header just add the generic one */
	return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
}

295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
static int nl80211_msg_put_channel(struct sk_buff *msg,
				   struct ieee80211_channel *chan)
{
	NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
		    chan->center_freq);

	if (chan->flags & IEEE80211_CHAN_DISABLED)
		NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
	if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
		NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
	if (chan->flags & IEEE80211_CHAN_NO_IBSS)
		NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
	if (chan->flags & IEEE80211_CHAN_RADAR)
		NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);

	NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
		    DBM_TO_MBM(chan->max_power));

	return 0;

 nla_put_failure:
	return -ENOBUFS;
}

319
320
/* netlink command implementations */

321
322
323
struct key_parse {
	struct key_params p;
	int idx;
324
	int type;
325
	bool def, defmgmt;
326
	bool def_uni, def_multi;
327
328
329
330
331
332
333
334
335
336
337
338
339
};

static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
{
	struct nlattr *tb[NL80211_KEY_MAX + 1];
	int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
				   nl80211_key_policy);
	if (err)
		return err;

	k->def = !!tb[NL80211_KEY_DEFAULT];
	k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];

340
341
342
343
344
345
346
	if (k->def) {
		k->def_uni = true;
		k->def_multi = true;
	}
	if (k->defmgmt)
		k->def_multi = true;

347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
	if (tb[NL80211_KEY_IDX])
		k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);

	if (tb[NL80211_KEY_DATA]) {
		k->p.key = nla_data(tb[NL80211_KEY_DATA]);
		k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
	}

	if (tb[NL80211_KEY_SEQ]) {
		k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
		k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
	}

	if (tb[NL80211_KEY_CIPHER])
		k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);

363
364
365
366
367
368
	if (tb[NL80211_KEY_TYPE]) {
		k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
		if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
			return -EINVAL;
	}

369
370
371
372
373
374
375
376
377
378
379
380
381
	if (tb[NL80211_KEY_DEFAULT_TYPES]) {
		struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
		int err = nla_parse_nested(kdt,
					   NUM_NL80211_KEY_DEFAULT_TYPES - 1,
					   tb[NL80211_KEY_DEFAULT_TYPES],
					   nl80211_key_default_policy);
		if (err)
			return err;

		k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
		k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
	}

382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
	return 0;
}

static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
{
	if (info->attrs[NL80211_ATTR_KEY_DATA]) {
		k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
		k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
	}

	if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
		k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
		k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
	}

	if (info->attrs[NL80211_ATTR_KEY_IDX])
		k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);

	if (info->attrs[NL80211_ATTR_KEY_CIPHER])
		k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);

	k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
	k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];

406
407
408
409
410
411
412
	if (k->def) {
		k->def_uni = true;
		k->def_multi = true;
	}
	if (k->defmgmt)
		k->def_multi = true;

413
414
415
416
417
418
	if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
		k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
		if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
			return -EINVAL;
	}

419
420
421
422
423
424
425
426
427
428
429
430
431
	if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
		struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
		int err = nla_parse_nested(
				kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
				info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
				nl80211_key_default_policy);
		if (err)
			return err;

		k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
		k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
	}

432
433
434
435
436
437
438
439
440
	return 0;
}

static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
{
	int err;

	memset(k, 0, sizeof(*k));
	k->idx = -1;
441
	k->type = -1;
442
443
444
445
446
447
448
449
450
451
452
453

	if (info->attrs[NL80211_ATTR_KEY])
		err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
	else
		err = nl80211_parse_key_old(info, k);

	if (err)
		return err;

	if (k->def && k->defmgmt)
		return -EINVAL;

454
455
456
457
458
	if (k->defmgmt) {
		if (k->def_uni || !k->def_multi)
			return -EINVAL;
	}

459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
	if (k->idx != -1) {
		if (k->defmgmt) {
			if (k->idx < 4 || k->idx > 5)
				return -EINVAL;
		} else if (k->def) {
			if (k->idx < 0 || k->idx > 3)
				return -EINVAL;
		} else {
			if (k->idx < 0 || k->idx > 5)
				return -EINVAL;
		}
	}

	return 0;
}

Johannes Berg's avatar
Johannes Berg committed
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
static struct cfg80211_cached_keys *
nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
		       struct nlattr *keys)
{
	struct key_parse parse;
	struct nlattr *key;
	struct cfg80211_cached_keys *result;
	int rem, err, def = 0;

	result = kzalloc(sizeof(*result), GFP_KERNEL);
	if (!result)
		return ERR_PTR(-ENOMEM);

	result->def = -1;
	result->defmgmt = -1;

	nla_for_each_nested(key, keys, rem) {
		memset(&parse, 0, sizeof(parse));
		parse.idx = -1;

		err = nl80211_parse_key_new(key, &parse);
		if (err)
			goto error;
		err = -EINVAL;
		if (!parse.p.key)
			goto error;
		if (parse.idx < 0 || parse.idx > 4)
			goto error;
		if (parse.def) {
			if (def)
				goto error;
			def = 1;
			result->def = parse.idx;
508
509
			if (!parse.def_uni || !parse.def_multi)
				goto error;
Johannes Berg's avatar
Johannes Berg committed
510
511
512
		} else if (parse.defmgmt)
			goto error;
		err = cfg80211_validate_key_settings(rdev, &parse.p,
513
						     parse.idx, false, NULL);
Johannes Berg's avatar
Johannes Berg committed
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
		if (err)
			goto error;
		result->params[parse.idx].cipher = parse.p.cipher;
		result->params[parse.idx].key_len = parse.p.key_len;
		result->params[parse.idx].key = result->data[parse.idx];
		memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
	}

	return result;
 error:
	kfree(result);
	return ERR_PTR(err);
}

static int nl80211_key_allowed(struct wireless_dev *wdev)
{
	ASSERT_WDEV_LOCK(wdev);

	switch (wdev->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
535
	case NL80211_IFTYPE_P2P_GO:
Johannes Berg's avatar
Johannes Berg committed
536
537
538
539
540
541
		break;
	case NL80211_IFTYPE_ADHOC:
		if (!wdev->current_bss)
			return -ENOLINK;
		break;
	case NL80211_IFTYPE_STATION:
542
	case NL80211_IFTYPE_P2P_CLIENT:
Johannes Berg's avatar
Johannes Berg committed
543
544
545
546
547
548
549
550
551
552
		if (wdev->sme_state != CFG80211_SME_CONNECTED)
			return -ENOLINK;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

553
554
555
556
static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
557
558
559
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
560
	struct nlattr *nl_modes;
561
	struct nlattr *nl_cmds;
562
563
564
565
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
566
	u16 ifmodes = dev->wiphy.interface_modes;
567
568
	const struct ieee80211_txrx_stypes *mgmt_stypes =
				dev->wiphy.mgmt_stypes;
569
570
571
572
573

	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
	if (!hdr)
		return -1;

574
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
575
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
576

577
578
579
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
		    cfg80211_rdev_list_generation);

580
581
582
583
584
585
586
587
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
		   dev->wiphy.retry_short);
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
		   dev->wiphy.retry_long);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
		    dev->wiphy.frag_threshold);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
		    dev->wiphy.rts_threshold);
588
589
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
		    dev->wiphy.coverage_class);
590
591
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
592
593
	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
		    dev->wiphy.max_scan_ie_len);
594

595
596
597
	if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);

598
599
600
601
	NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
		sizeof(u32) * dev->wiphy.n_cipher_suites,
		dev->wiphy.cipher_suites);

Samuel Ortiz's avatar
Samuel Ortiz committed
602
603
604
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
		   dev->wiphy.max_num_pmkids);

605
606
607
	if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
		NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);

608
609
	if ((dev->wiphy.available_antennas_tx ||
	     dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
610
611
612
613
614
615
616
617
618
		u32 tx_ant = 0, rx_ant = 0;
		int res;
		res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
		if (!res) {
			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
		}
	}

619
620
621
622
623
624
625
626
627
628
629
630
631
632
	nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
	if (!nl_modes)
		goto nla_put_failure;

	i = 0;
	while (ifmodes) {
		if (ifmodes & 1)
			NLA_PUT_FLAG(msg, i);
		ifmodes >>= 1;
		i++;
	}

	nla_nest_end(msg, nl_modes);

633
634
635
636
637
638
639
640
641
642
643
644
	nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
	if (!nl_bands)
		goto nla_put_failure;

	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
		if (!dev->wiphy.bands[band])
			continue;

		nl_band = nla_nest_start(msg, band);
		if (!nl_band)
			goto nla_put_failure;

645
646
647
648
649
650
651
652
653
654
655
656
657
		/* add HT info */
		if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
			NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
				sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
				&dev->wiphy.bands[band]->ht_cap.mcs);
			NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
				dev->wiphy.bands[band]->ht_cap.cap);
			NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
				dev->wiphy.bands[band]->ht_cap.ampdu_factor);
			NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
				dev->wiphy.bands[band]->ht_cap.ampdu_density);
		}

658
659
660
661
662
663
664
665
666
667
668
		/* add frequencies */
		nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
		if (!nl_freqs)
			goto nla_put_failure;

		for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
			nl_freq = nla_nest_start(msg, i);
			if (!nl_freq)
				goto nla_put_failure;

			chan = &dev->wiphy.bands[band]->channels[i];
669
670
671

			if (nl80211_msg_put_channel(msg, chan))
				goto nla_put_failure;
672

673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
			nla_nest_end(msg, nl_freq);
		}

		nla_nest_end(msg, nl_freqs);

		/* add bitrates */
		nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
		if (!nl_rates)
			goto nla_put_failure;

		for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
			nl_rate = nla_nest_start(msg, i);
			if (!nl_rate)
				goto nla_put_failure;

			rate = &dev->wiphy.bands[band]->bitrates[i];
			NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
				    rate->bitrate);
			if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
				NLA_PUT_FLAG(msg,
					NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);

			nla_nest_end(msg, nl_rate);
		}

		nla_nest_end(msg, nl_rates);

		nla_nest_end(msg, nl_band);
	}
	nla_nest_end(msg, nl_bands);

704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
	nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
	if (!nl_cmds)
		goto nla_put_failure;

	i = 0;
#define CMD(op, n)						\
	 do {							\
		if (dev->ops->op) {				\
			i++;					\
			NLA_PUT_U32(msg, i, NL80211_CMD_ ## n);	\
		}						\
	} while (0)

	CMD(add_virtual_intf, NEW_INTERFACE);
	CMD(change_virtual_intf, SET_INTERFACE);
	CMD(add_key, NEW_KEY);
	CMD(add_beacon, NEW_BEACON);
	CMD(add_station, NEW_STATION);
	CMD(add_mpath, NEW_MPATH);
723
	CMD(update_mesh_config, SET_MESH_CONFIG);
724
	CMD(change_bss, SET_BSS);
725
726
727
728
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
Johannes Berg's avatar
Johannes Berg committed
729
	CMD(join_ibss, JOIN_IBSS);
730
	CMD(join_mesh, JOIN_MESH);
Samuel Ortiz's avatar
Samuel Ortiz committed
731
732
733
	CMD(set_pmksa, SET_PMKSA);
	CMD(del_pmksa, DEL_PMKSA);
	CMD(flush_pmksa, FLUSH_PMKSA);
734
	CMD(remain_on_channel, REMAIN_ON_CHANNEL);
735
	CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
736
	CMD(mgmt_tx, FRAME);
737
	CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
738
	if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
739
740
741
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
	}
742
	CMD(set_channel, SET_CHANNEL);
743
	CMD(set_wds_peer, SET_WDS_PEER);
744
745

#undef CMD
746

747
	if (dev->ops->connect || dev->ops->auth) {
748
749
750
751
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
	}

752
	if (dev->ops->disconnect || dev->ops->deauth) {
753
754
755
756
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
	}

757
758
	nla_nest_end(msg, nl_cmds);

759
760
761
762
	if (dev->ops->remain_on_channel)
		NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
			    dev->wiphy.max_remain_on_channel_duration);

763
764
765
766
	/* for now at least assume all drivers have it */
	if (dev->ops->mgmt_tx)
		NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);

767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
	if (mgmt_stypes) {
		u16 stypes;
		struct nlattr *nl_ftypes, *nl_ifs;
		enum nl80211_iftype ift;

		nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
		if (!nl_ifs)
			goto nla_put_failure;

		for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
			nl_ftypes = nla_nest_start(msg, ift);
			if (!nl_ftypes)
				goto nla_put_failure;
			i = 0;
			stypes = mgmt_stypes[ift].tx;
			while (stypes) {
				if (stypes & 1)
					NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
						    (i << 4) | IEEE80211_FTYPE_MGMT);
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}

Johannes Berg's avatar
Johannes Berg committed
792
793
		nla_nest_end(msg, nl_ifs);

794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
		nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
		if (!nl_ifs)
			goto nla_put_failure;

		for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
			nl_ftypes = nla_nest_start(msg, ift);
			if (!nl_ftypes)
				goto nla_put_failure;
			i = 0;
			stypes = mgmt_stypes[ift].rx;
			while (stypes) {
				if (stypes & 1)
					NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
						    (i << 4) | IEEE80211_FTYPE_MGMT);
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}
		nla_nest_end(msg, nl_ifs);
	}

816
817
818
	return genlmsg_end(msg, hdr);

 nla_put_failure:
819
820
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
821
822
823
824
825
826
827
828
}

static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
{
	int idx = 0;
	int start = cb->args[0];
	struct cfg80211_registered_device *dev;

829
	mutex_lock(&cfg80211_mutex);
830
	list_for_each_entry(dev, &cfg80211_rdev_list, list) {
831
832
		if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
			continue;
833
		if (++idx <= start)
834
835
836
			continue;
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
837
838
				       dev) < 0) {
			idx--;
839
			break;
840
		}
841
	}
842
	mutex_unlock(&cfg80211_mutex);
843
844
845
846
847
848
849
850
851

	cb->args[0] = idx;

	return skb->len;
}

static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct sk_buff *msg;
852
	struct cfg80211_registered_device *dev = info->user_ptr[0];
853

854
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
855
	if (!msg)
856
		return -ENOMEM;
857

858
859
860
861
	if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
		nlmsg_free(msg);
		return -ENOBUFS;
	}
862

Johannes Berg's avatar
Johannes Berg committed
863
	return genlmsg_reply(msg, info);
864
865
}

866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
	[NL80211_TXQ_ATTR_QUEUE]		= { .type = NLA_U8 },
	[NL80211_TXQ_ATTR_TXOP]			= { .type = NLA_U16 },
	[NL80211_TXQ_ATTR_CWMIN]		= { .type = NLA_U16 },
	[NL80211_TXQ_ATTR_CWMAX]		= { .type = NLA_U16 },
	[NL80211_TXQ_ATTR_AIFS]			= { .type = NLA_U8 },
};

static int parse_txq_params(struct nlattr *tb[],
			    struct ieee80211_txq_params *txq_params)
{
	if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
	    !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
	    !tb[NL80211_TXQ_ATTR_AIFS])
		return -EINVAL;

	txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
	txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
	txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
	txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
	txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);

	return 0;
}

891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
{
	/*
	 * You can only set the channel explicitly for AP, mesh
	 * and WDS type interfaces; all others have their channel
	 * managed via their respective "establish a connection"
	 * command (connect, join, ...)
	 *
	 * Monitors are special as they are normally slaved to
	 * whatever else is going on, so they behave as though
	 * you tried setting the wiphy channel itself.
	 */
	return !wdev ||
		wdev->iftype == NL80211_IFTYPE_AP ||
		wdev->iftype == NL80211_IFTYPE_WDS ||
		wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
907
908
		wdev->iftype == NL80211_IFTYPE_MONITOR ||
		wdev->iftype == NL80211_IFTYPE_P2P_GO;
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
}

static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
				 struct wireless_dev *wdev,
				 struct genl_info *info)
{
	enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
	u32 freq;
	int result;

	if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
		return -EINVAL;

	if (!nl80211_can_set_dev_channel(wdev))
		return -EOPNOTSUPP;

	if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
		channel_type = nla_get_u32(info->attrs[
				   NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
		if (channel_type != NL80211_CHAN_NO_HT &&
		    channel_type != NL80211_CHAN_HT20 &&
		    channel_type != NL80211_CHAN_HT40PLUS &&
		    channel_type != NL80211_CHAN_HT40MINUS)
			return -EINVAL;
	}

	freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);

	mutex_lock(&rdev->devlist_mtx);
	if (wdev) {
		wdev_lock(wdev);
		result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
		wdev_unlock(wdev);
	} else {
		result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
	}
	mutex_unlock(&rdev->devlist_mtx);

	return result;
}

static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
{
952
953
	struct cfg80211_registered_device *rdev = info->user_ptr[0];
	struct net_device *netdev = info->user_ptr[1];
954

955
	return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
956
957
}

958
959
static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
{
960
961
962
	struct cfg80211_registered_device *rdev = info->user_ptr[0];
	struct net_device *dev = info->user_ptr[1];
	struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg's avatar
Johannes Berg committed
963
	const u8 *bssid;
964
965
966
967

	if (!info->attrs[NL80211_ATTR_MAC])
		return -EINVAL;

968
969
	if (netif_running(dev))
		return -EBUSY;
970

971
972
	if (!rdev->ops->set_wds_peer)
		return -EOPNOTSUPP;
973

974
975
	if (wdev->iftype != NL80211_IFTYPE_WDS)
		return -EOPNOTSUPP;
976
977

	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
978
	return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
979
980
981
}


982
983
984
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
985
986
	struct net_device *netdev = NULL;
	struct wireless_dev *wdev;
Bill Jordan's avatar
Bill Jordan committed
987
	int result = 0, rem_txq_params = 0;
988
	struct nlattr *nl_txq_params;
989
990
991
	u32 changed;
	u8 retry_short = 0, retry_long = 0;
	u32 frag_threshold = 0, rts_threshold = 0;
992
	u8 coverage_class = 0;
993

994
995
996
997
998
999
1000
1001
1002
	/*
	 * Try to find the wiphy and netdev. Normally this
	 * function shouldn't need the netdev, but this is
	 * done for backward compatibility -- previously
	 * setting the channel was done per wiphy, but now
	 * it is per netdev. Previous userland like hostapd
	 * also passed a netdev to set_wiphy, so that it is
	 * possible to let that go to the right netdev!
	 */
1003
1004
	mutex_lock(&cfg80211_mutex);

1005
1006
1007
1008
1009
1010
1011
1012
1013
	if (info->attrs[NL80211_ATTR_IFINDEX]) {
		int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);

		netdev = dev_get_by_index(genl_info_net(info), ifindex);
		if (netdev && netdev->ieee80211_ptr) {
			rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
			mutex_lock(&rdev->mtx);
		} else
			netdev = NULL;
1014
1015
	}

1016
1017
1018
1019
	if (!netdev) {
		rdev = __cfg80211_rdev_from_info(info);
		if (IS_ERR(rdev)) {
			mutex_unlock(&cfg80211_mutex);
1020
			return PTR_ERR(rdev);
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
		}
		wdev = NULL;
		netdev = NULL;
		result = 0;

		mutex_lock(&rdev->mtx);
	} else if (netif_running(netdev) &&
		   nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
		wdev = netdev->ieee80211_ptr;
	else
		wdev = NULL;

	/*
	 * end workaround code, by now the rdev is available
	 * and locked, and wdev may or may not be NULL.
	 */
1037
1038

	if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1039
1040
		result = cfg80211_dev_rename(
			rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1041
1042
1043
1044
1045

	mutex_unlock(&cfg80211_mutex);

	if (result)
		goto bad_res;
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072

	if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
		struct ieee80211_txq_params txq_params;
		struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];

		if (!rdev->ops->set_txq_params) {
			result = -EOPNOTSUPP;
			goto bad_res;
		}

		nla_for_each_nested(nl_txq_params,
				    info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
				    rem_txq_params) {
			nla_parse(tb, NL80211_TXQ_ATTR_MAX,
				  nla_data(nl_txq_params),
				  nla_len(nl_txq_params),
				  txq_params_policy);
			result = parse_txq_params(tb, &txq_params);
			if (result)
				goto bad_res;

			result = rdev->ops->set_txq_params(&rdev->wiphy,
							   &txq_params);
			if (result)
				goto bad_res;
		}
	}
1073

1074
	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1075
		result = __nl80211_set_channel(rdev, wdev, info);
1076
1077
1078
1079
		if (result)
			goto bad_res;
	}

1080
1081
1082
1083
1084
	if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
		enum nl80211_tx_power_setting type;
		int idx, mbm = 0;

		if (!rdev->ops->set_tx_power) {
1085
			result = -EOPNOTSUPP;
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
			goto bad_res;
		}

		idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
		type = nla_get_u32(info->attrs[idx]);

		if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
		    (type != NL80211_TX_POWER_AUTOMATIC)) {
			result = -EINVAL;
			goto bad_res;
		}

		if (type != NL80211_TX_POWER_AUTOMATIC) {
			idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
			mbm = nla_get_u32(info->attrs[idx]);
		}

		result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
		if (result)
			goto bad_res;
	}

1108
1109
1110
	if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
	    info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
		u32 tx_ant, rx_ant;
1111
1112
1113
		if ((!rdev->wiphy.available_antennas_tx &&
		     !rdev->wiphy.available_antennas_rx) ||
		    !rdev->ops->set_antenna) {
1114
1115
1116
1117
1118
1119
1120
			result = -EOPNOTSUPP;
			goto bad_res;
		}

		tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
		rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);

1121
		/* reject antenna configurations which don't match the
1122
1123
1124
		 * available antenna masks, except for the "all" mask */
		if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
		    (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1125
1126
1127
1128
			result = -EINVAL;
			goto bad_res;
		}

1129
1130
		tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
		rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1131

1132
1133
1134
1135
1136
		result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
		if (result)
			goto bad_res;
	}

1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
	changed = 0;

	if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
		retry_short = nla_get_u8(
			info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
		if (retry_short == 0) {
			result = -EINVAL;
			goto bad_res;
		}
		changed |= WIPHY_PARAM_RETRY_SHORT;
	}

	if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
		retry_long = nla_get_u8(
			info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
		if (retry_long == 0) {
			result = -EINVAL;
			goto bad_res;
		}
		changed |= WIPHY_PARAM_RETRY_LONG;
	}

	if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
		frag_threshold = nla_get_u32(
			info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
		if (frag_threshold < 256) {
			result = -EINVAL;
			goto bad_res;
		}
		if (frag_threshold != (u32) -1) {
			/*
			 * Fragments (apart from the last one) are required to
			 * have even length. Make the fragmentation code
			 * simpler by stripping LSB should someone try to use
			 * odd threshold value.
			 */
			frag_threshold &= ~0x1;
		}
		changed |= WIPHY_PARAM_FRAG_THRESHOLD;
	}

	if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
		rts_threshold = nla_get_u32(
			info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
		changed |= WIPHY_PARAM_RTS_THRESHOLD;
	}

1184
1185
1186
1187
1188
1189
	if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
		coverage_class = nla_get_u8(
			info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
		changed |= WIPHY_PARAM_COVERAGE_CLASS;
	}

1190
1191
1192
	if (changed) {
		u8 old_retry_short, old_retry_long;
		u32 old_frag_threshold, old_rts_threshold;
1193
		u8 old_coverage_class;
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203

		if (!rdev->ops->set_wiphy_params) {
			result = -EOPNOTSUPP;
			goto bad_res;
		}

		old_retry_short = rdev->wiphy.retry_short;
		old_retry_long = rdev->wiphy.retry_long;
		old_frag_threshold = rdev->wiphy.frag_threshold;
		old_rts_threshold = rdev->wiphy.rts_threshold;
1204
		old_coverage_class = rdev->wiphy.coverage_class;
1205
1206
1207
1208
1209
1210
1211
1212
1213

		if (changed & WIPHY_PARAM_RETRY_SHORT)
			rdev->wiphy.retry_short = retry_short;
		if (changed & WIPHY_PARAM_RETRY_LONG)
			rdev->wiphy.retry_long = retry_long;
		if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
			rdev->wiphy.frag_threshold = frag_threshold;
		if (changed & WIPHY_PARAM_RTS_THRESHOLD)
			rdev->wiphy.rts_threshold = rts_threshold;
1214
1215
		if (changed & WIPHY_PARAM_COVERAGE_CLASS)
			rdev->wiphy.coverage_class = coverage_class;
1216
1217
1218
1219
1220
1221
1222

		result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
		if (result) {
			rdev->wiphy.retry_short = old_retry_short;
			rdev->wiphy.retry_long = old_retry_long;
			rdev->wiphy.frag_threshold = old_frag_threshold;
			rdev->wiphy.rts_threshold = old_rts_threshold;
1223
			rdev->wiphy.coverage_class = old_coverage_class;
1224
1225
		}
	}
1226

1227
 bad_res:
1228
	mutex_unlock(&rdev->mtx);
1229
1230
	if (netdev)
		dev_put(netdev);
1231
1232
1233
1234
1235
	return result;
}


static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1236
			      struct cfg80211_registered_device *rdev,
1237
1238
1239
1240
1241
1242
1243
1244
1245
			      struct net_device *dev)
{
	void *hdr;

	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
	if (!hdr)
		return -1;

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1246
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1247
	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
Johannes Berg's avatar
Johannes Berg committed
1248
	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1249
1250
1251
1252
1253

	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
		    rdev->devlist_generation ^
			(cfg80211_rdev_list_generation << 2));

1254
1255
1256
	return genlmsg_end(msg, hdr);

 nla_put_failure:
1257
1258
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
1259
1260
1261
1262
1263
1264
1265
1266
}

static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
{
	int wp_idx = 0;
	int if_idx = 0;
	int wp_start = cb->args[0];
	int if_start = cb->args[1];
1267
	struct cfg80211_registered_device *rdev;
1268
1269
	struct wireless_dev *wdev;

1270
	mutex_lock(&cfg80211_mutex);
1271
1272
	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
		if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1273
			continue;
Johannes Berg's avatar
Johannes Berg committed
1274
1275
		if (wp_idx < wp_start) {
			wp_idx++;
1276
			continue;
Johannes Berg's avatar
Johannes Berg committed
1277
		}
1278
1279
		if_idx = 0;

1280
1281
		mutex_lock(&rdev->devlist_mtx);
		list_for_each_entry(wdev, &rdev->netdev_list, list) {
Johannes Berg's avatar
Johannes Berg committed
1282
1283
			if (if_idx < if_start) {
				if_idx++;
1284
				continue;
Johannes Berg's avatar
Johannes Berg committed
1285
			}
1286
1287
			if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
					       cb->nlh->nlmsg_seq, NLM_F_MULTI,
1288
1289
					       rdev, wdev->netdev) < 0) {
				mutex_unlock(&rdev->devlist_mtx);
Johannes Berg's avatar
Johannes Berg committed
1290
1291
1292
				goto out;
			}
			if_idx++;
1293
		}
1294
		mutex_unlock(&rdev->devlist_mtx);
Johannes Berg's avatar
Johannes Berg committed
1295
1296

		wp_idx++;
1297
	}
Johannes Berg's avatar
Johannes Berg committed
1298
 out:
1299
	mutex_unlock(&cfg80211_mutex);
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309

	cb->args[0] = wp_idx;
	cb->args[1] = if_idx;

	return skb->len;
}

static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
{
	struct sk_buff *msg;
1310
1311
	struct cfg80211_registered_device *dev = info->user_ptr[0];
	struct net_device *netdev = info->user_ptr[1];
1312

1313
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1314
	if (!msg)
1315
		return -ENOMEM;
1316

1317
	if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1318
1319
1320
1321
			       dev, netdev) < 0) {
		nlmsg_free(msg);
		return -ENOBUFS;
	}
1322

Johannes Berg's avatar
Johannes Berg committed
1323
	return genlmsg_reply(msg, info);
1324
1325
}

1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
	[NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
	[NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
	[NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
	[NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
	[NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
};

static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
{
	struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
	int flag;

	*mntrflags = 0;

	if (!nla)
		return -EINVAL;

	if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
			     nla, mntr_flags_policy))
		return -EINVAL;

	for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
		if (flags[flag])
			*mntrflags |= (1<<flag);

	return 0;
}

1355
static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1356
1357
			       struct net_device *netdev, u8 use_4addr,
			       enum nl80211_iftype iftype)
1358
{
1359
	if (!use_4addr) {
1360
		if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1361
			return -EBUSY;
1362
		return 0;
1363
	}
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380

	switch (iftype) {
	case NL80211_IFTYPE_AP_VLAN:
		if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
			return 0;
		break;
	case NL80211_IFTYPE_STATION:
		if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
			return 0;
		break;
	default:
		break;
	}

	return -EOPNOTSUPP;
}

1381
1382
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
1383
	struct cfg80211_registered_device *rdev = info->user_ptr[0];
1384
	struct vif_params params;
1385
	int err;
Johannes Berg's avatar
Johannes Berg committed
1386
	enum nl80211_iftype otype, ntype;
1387
	struct net_device *dev = info->user_ptr[1];
1388
	u32 _flags, *flags = NULL;
1389
	bool change = false;
1390

1391
1392
	memset(&params, 0, sizeof(params));