nl80211.c 137 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
10
11
12
13
14
15
 */

#include <linux/if.h>
#include <linux/module.h>
#include <linux/err.h>
#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>
16
#include <linux/etherdevice.h>
17
#include <net/net_namespace.h>
18
19
#include <net/genetlink.h>
#include <net/cfg80211.h>
20
#include <net/sock.h>
21
22
#include "core.h"
#include "nl80211.h"
23
#include "reg.h"
24
25
26
27
28
29
30
31

/* 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,
32
	.netnsok = true,
33
34
};

35
/* internal helper: get rdev and dev */
36
static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
37
				       struct cfg80211_registered_device **rdev,
38
39
				       struct net_device **dev)
{
40
	struct nlattr **attrs = info->attrs;
41
42
	int ifindex;

Johannes Berg's avatar
Johannes Berg committed
43
	if (!attrs[NL80211_ATTR_IFINDEX])
44
45
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
46
	ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
47
	*dev = dev_get_by_index(genl_info_net(info), ifindex);
48
49
50
	if (!*dev)
		return -ENODEV;

51
	*rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
52
	if (IS_ERR(*rdev)) {
53
		dev_put(*dev);
54
		return PTR_ERR(*rdev);
55
56
57
58
59
60
	}

	return 0;
}

/* policy for the attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
61
static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
62
63
	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
64
				      .len = 20-1 },
65
	[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
66
	[NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
Sujith's avatar
Sujith committed
67
	[NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
68
69
70
71
	[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 },
72
	[NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
73
74
75
76

	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
77
78

	[NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
79
	[NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
80

81
	[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
82
83
84
85
86
	[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 },
87
	[NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
88
89
90
91
92
93
94

	[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 },
95
96
97
98
99
	[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 },
100
	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
101
	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
Johannes Berg's avatar
Johannes Berg committed
102
	[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
103
104
105
	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_MESH_ID_LEN },
	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
106

107
108
109
	[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
	[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },

110
111
112
	[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 },
113
114
	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
					   .len = NL80211_MAX_SUPP_RATES },
115

116
117
	[NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },

118
119
	[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
					 .len = NL80211_HT_CAPABILITY_LEN },
120
121
122
123

	[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
	[NL80211_ATTR_IE] = { .type = NLA_BINARY,
			      .len = IEEE80211_MAX_DATA_LEN },
124
125
	[NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
	[NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
126
127
128
129
130

	[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
131
	[NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
132
	[NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
133
	[NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
134
135
136
	[NL80211_ATTR_STA_FLAGS2] = {
		.len = sizeof(struct nl80211_sta_flag_update),
	},
137
	[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
138
139
140
	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
141
	[NL80211_ATTR_PID] = { .type = NLA_U32 },
142
	[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
Samuel Ortiz's avatar
Samuel Ortiz committed
143
144
	[NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
				 .len = WLAN_PMKID_LEN },
145
146
	[NL80211_ATTR_DURATION] = { .type = NLA_U32 },
	[NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
147
	[NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
148
149
150
	[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
151
	[NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
152
	[NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
153
154
};

155
/* policy for the attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
156
static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
Johannes Berg's avatar
Johannes Berg committed
157
	[NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
158
159
160
161
162
163
164
	[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 },
};

165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
/* 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;
}

185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/* 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;
}

215
216
217
218
219
220
221
222
/* 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);
}

223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
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;
}

247
248
/* netlink command implementations */

249
250
251
252
253
254
255
256
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
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
struct key_parse {
	struct key_params p;
	int idx;
	bool def, defmgmt;
};

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];

	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]);

	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];

	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;

	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;

	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
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
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;
		} else if (parse.defmgmt)
			goto error;
		err = cfg80211_validate_key_settings(rdev, &parse.p,
						     parse.idx, NULL);
		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);

	if (!netif_running(wdev->netdev))
		return -ENETDOWN;

	switch (wdev->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
		break;
	case NL80211_IFTYPE_ADHOC:
		if (!wdev->current_bss)
			return -ENOLINK;
		break;
	case NL80211_IFTYPE_STATION:
		if (wdev->sme_state != CFG80211_SME_CONNECTED)
			return -ENOLINK;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

420
421
422
423
static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
424
425
426
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
427
	struct nlattr *nl_modes;
428
	struct nlattr *nl_cmds;
429
430
431
432
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
433
	u16 ifmodes = dev->wiphy.interface_modes;
434
435
436
437
438

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

439
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
440
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
441

442
443
444
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
		    cfg80211_rdev_list_generation);

445
446
447
448
449
450
451
452
	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);
453
454
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
		    dev->wiphy.coverage_class);
455

456
457
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
458
459
	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
		    dev->wiphy.max_scan_ie_len);
460

461
462
463
464
	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
465
466
467
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
		   dev->wiphy.max_num_pmkids);

468
469
470
471
472
473
474
475
476
477
478
479
480
481
	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);

482
483
484
485
486
487
488
489
490
491
492
493
	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;

494
495
496
497
498
499
500
501
502
503
504
505
506
		/* 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);
		}

507
508
509
510
511
512
513
514
515
516
517
		/* 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];
518
519
520

			if (nl80211_msg_put_channel(msg, chan))
				goto nla_put_failure;
521

522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
			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);

553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
	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);
	CMD(set_mesh_params, SET_MESH_PARAMS);
	CMD(change_bss, SET_BSS);
574
575
576
577
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
Johannes Berg's avatar
Johannes Berg committed
578
	CMD(join_ibss, JOIN_IBSS);
Samuel Ortiz's avatar
Samuel Ortiz committed
579
580
581
	CMD(set_pmksa, SET_PMKSA);
	CMD(del_pmksa, DEL_PMKSA);
	CMD(flush_pmksa, FLUSH_PMKSA);
582
	CMD(remain_on_channel, REMAIN_ON_CHANNEL);
583
	CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
584
	CMD(action, ACTION);
585
	if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
586
587
588
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
	}
589
590

#undef CMD
591

592
	if (dev->ops->connect || dev->ops->auth) {
593
594
595
596
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
	}

597
	if (dev->ops->disconnect || dev->ops->deauth) {
598
599
600
601
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
	}

602
603
	nla_nest_end(msg, nl_cmds);

604
605
606
	return genlmsg_end(msg, hdr);

 nla_put_failure:
607
608
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
609
610
611
612
613
614
615
616
}

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;

617
	mutex_lock(&cfg80211_mutex);
618
	list_for_each_entry(dev, &cfg80211_rdev_list, list) {
619
620
		if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
			continue;
621
		if (++idx <= start)
622
623
624
			continue;
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
625
626
				       dev) < 0) {
			idx--;
627
			break;
628
		}
629
	}
630
	mutex_unlock(&cfg80211_mutex);
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645

	cb->args[0] = idx;

	return skb->len;
}

static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct sk_buff *msg;
	struct cfg80211_registered_device *dev;

	dev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(dev))
		return PTR_ERR(dev);

646
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
647
648
649
650
651
652
	if (!msg)
		goto out_err;

	if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
		goto out_free;

653
	cfg80211_unlock_rdev(dev);
654

Johannes Berg's avatar
Johannes Berg committed
655
	return genlmsg_reply(msg, info);
656
657
658
659

 out_free:
	nlmsg_free(msg);
 out_err:
660
	cfg80211_unlock_rdev(dev);
661
662
663
	return -ENOBUFS;
}

664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
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;
}

689
690
691
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
692
693
	int result = 0, rem_txq_params = 0;
	struct nlattr *nl_txq_params;
694
695
696
	u32 changed;
	u8 retry_short = 0, retry_long = 0;
	u32 frag_threshold = 0, rts_threshold = 0;
697
	u8 coverage_class = 0;
698

699
	rtnl_lock();
700

701
702
	mutex_lock(&cfg80211_mutex);

703
	rdev = __cfg80211_rdev_from_info(info);
704
	if (IS_ERR(rdev)) {
705
		mutex_unlock(&cfg80211_mutex);
706
707
708
709
710
711
712
		result = PTR_ERR(rdev);
		goto unlock;
	}

	mutex_lock(&rdev->mtx);

	if (info->attrs[NL80211_ATTR_WIPHY_NAME])
713
714
		result = cfg80211_dev_rename(
			rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
715
716
717
718
719

	mutex_unlock(&cfg80211_mutex);

	if (result)
		goto bad_res;
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746

	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;
		}
	}
747

748
	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
Sujith's avatar
Sujith committed
749
		enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
750
		u32 freq;
751

752
753
		result = -EINVAL;

Sujith's avatar
Sujith committed
754
755
756
757
758
759
760
		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)
761
762
763
764
				goto bad_res;
		}

		freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
765

766
		mutex_lock(&rdev->devlist_mtx);
767
		result = rdev_set_freq(rdev, NULL, freq, channel_type);
768
		mutex_unlock(&rdev->devlist_mtx);
769
770
771
772
		if (result)
			goto bad_res;
	}

773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
	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;
	}

820
821
822
823
824
825
	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;
	}

826
827
828
	if (changed) {
		u8 old_retry_short, old_retry_long;
		u32 old_frag_threshold, old_rts_threshold;
829
		u8 old_coverage_class;
830
831
832
833
834
835
836
837
838
839

		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;
840
		old_coverage_class = rdev->wiphy.coverage_class;
841
842
843
844
845
846
847
848
849

		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;
850
851
		if (changed & WIPHY_PARAM_COVERAGE_CLASS)
			rdev->wiphy.coverage_class = coverage_class;
852
853
854
855
856
857
858

		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;
859
			rdev->wiphy.coverage_class = old_coverage_class;
860
861
		}
	}
862

863
 bad_res:
864
865
866
	mutex_unlock(&rdev->mtx);
 unlock:
	rtnl_unlock();
867
868
869
870
871
	return result;
}


static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
872
			      struct cfg80211_registered_device *rdev,
873
874
875
876
877
878
879
880
881
			      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);
882
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
883
	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
Johannes Berg's avatar
Johannes Berg committed
884
	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
885
886
887
888
889

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

890
891
892
	return genlmsg_end(msg, hdr);

 nla_put_failure:
893
894
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
895
896
897
898
899
900
901
902
}

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];
903
	struct cfg80211_registered_device *rdev;
904
905
	struct wireless_dev *wdev;

906
	mutex_lock(&cfg80211_mutex);
907
908
	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
		if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
909
			continue;
Johannes Berg's avatar
Johannes Berg committed
910
911
		if (wp_idx < wp_start) {
			wp_idx++;
912
			continue;
Johannes Berg's avatar
Johannes Berg committed
913
		}
914
915
		if_idx = 0;

916
917
		mutex_lock(&rdev->devlist_mtx);
		list_for_each_entry(wdev, &rdev->netdev_list, list) {
Johannes Berg's avatar
Johannes Berg committed
918
919
			if (if_idx < if_start) {
				if_idx++;
920
				continue;
Johannes Berg's avatar
Johannes Berg committed
921
			}
922
923
			if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
					       cb->nlh->nlmsg_seq, NLM_F_MULTI,
924
925
					       rdev, wdev->netdev) < 0) {
				mutex_unlock(&rdev->devlist_mtx);
Johannes Berg's avatar
Johannes Berg committed
926
927
928
				goto out;
			}
			if_idx++;
929
		}
930
		mutex_unlock(&rdev->devlist_mtx);
Johannes Berg's avatar
Johannes Berg committed
931
932

		wp_idx++;
933
	}
Johannes Berg's avatar
Johannes Berg committed
934
 out:
935
	mutex_unlock(&cfg80211_mutex);
936
937
938
939
940
941
942
943
944
945
946
947
948
949

	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;
	struct cfg80211_registered_device *dev;
	struct net_device *netdev;
	int err;

950
	err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
951
952
953
	if (err)
		return err;

954
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
955
956
957
	if (!msg)
		goto out_err;

958
959
	if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
			       dev, netdev) < 0)
960
961
962
		goto out_free;

	dev_put(netdev);
963
	cfg80211_unlock_rdev(dev);
964

Johannes Berg's avatar
Johannes Berg committed
965
	return genlmsg_reply(msg, info);
966
967
968
969
970

 out_free:
	nlmsg_free(msg);
 out_err:
	dev_put(netdev);
971
	cfg80211_unlock_rdev(dev);
972
973
974
	return -ENOBUFS;
}

975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
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;
}

1004
static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1005
1006
			       struct net_device *netdev, u8 use_4addr,
			       enum nl80211_iftype iftype)
1007
{
1008
1009
1010
	if (!use_4addr) {
		if (netdev && netdev->br_port)
			return -EBUSY;
1011
		return 0;
1012
	}
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029

	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;
}

1030
1031
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
1032
	struct cfg80211_registered_device *rdev;
1033
	struct vif_params params;
1034
	int err;
Johannes Berg's avatar
Johannes Berg committed
1035
	enum nl80211_iftype otype, ntype;
1036
	struct net_device *dev;
1037
	u32 _flags, *flags = NULL;
1038
	bool change = false;
1039

1040
1041
	memset(&params, 0, sizeof(params));

Johannes Berg's avatar
Johannes Berg committed
1042
1043
	rtnl_lock();

1044
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1045
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1046
1047
		goto unlock_rtnl;

Johannes Berg's avatar
Johannes Berg committed
1048
	otype = ntype = dev->ieee80211_ptr->iftype;
1049

1050
	if (info->attrs[NL80211_ATTR_IFTYPE]) {
1051
		ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
Johannes Berg's avatar
Johannes Berg committed
1052
		if (otype != ntype)
1053
			change = true;
Johannes Berg's avatar
Johannes Berg committed
1054
		if (ntype > NL80211_IFTYPE_MAX) {
1055
			err = -EINVAL;
1056
			goto unlock;
1057
		}
1058
1059
	}

1060
	if (info->attrs[NL80211_ATTR_MESH_ID]) {
Johannes Berg's avatar
Johannes Berg committed
1061
		if (ntype != NL80211_IFTYPE_MESH_POINT) {
1062
1063
1064
			err = -EINVAL;
			goto unlock;
		}
1065
1066
		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1067
		change = true;
1068
1069
	}

1070
1071
1072
	if (info->attrs[NL80211_ATTR_4ADDR]) {
		params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
		change = true;
1073
		err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1074
1075
		if (err)
			goto unlock;
1076
1077
1078
1079
	} else {
		params.use_4addr = -1;
	}

1080
	if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
Johannes Berg's avatar
Johannes Berg committed
1081
		if (ntype != NL80211_IFTYPE_MONITOR) {
1082
1083
1084
1085
1086
			err = -EINVAL;
			goto unlock;
		}
		err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
					  &_flags);
1087
1088
1089
1090
1091
		if (err)
			goto unlock;

		flags = &_flags;
		change = true;
1092
	}
Johannes Berg's avatar
Johannes Berg committed
1093

1094
	if (change)
1095
		err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1096
1097
	else
		err = 0;
Johannes Berg's avatar
Johannes Berg committed
1098

1099
1100
1101
	if (!err && params.use_4addr != -1)
		dev->ieee80211_ptr->use_4addr = params.use_4addr;

1102
 unlock:
1103
	dev_put(dev);
1104
	cfg80211_unlock_rdev(rdev);
Johannes Berg's avatar
Johannes Berg committed
1105
1106
 unlock_rtnl:
	rtnl_unlock();
1107
1108
1109
1110
1111
	return err;
}

static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
1112
	struct cfg80211_registered_device *rdev;
1113
	struct vif_params params;
1114
1115
	int err;
	enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1116
	u32 flags;
1117

1118
1119
	memset(&params, 0, sizeof(params));

1120
1121
1122
1123
1124
1125
1126
1127
1128
	if (!info->attrs[NL80211_ATTR_IFNAME])
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_IFTYPE]) {
		type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
		if (type > NL80211_IFTYPE_MAX)
			return -EINVAL;
	}

Johannes Berg's avatar
Johannes Berg committed
1129
1130
	rtnl_lock();

1131
1132
1133
	rdev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
Johannes Berg's avatar
Johannes Berg committed
1134
1135
		goto unlock_rtnl;
	}
1136

1137
1138
	if (!rdev->ops->add_virtual_intf ||
	    !(rdev->wiphy.interface_modes & (1 << type))) {
1139
1140
1141
1142
		err = -EOPNOTSUPP;
		goto unlock;
	}

1143
1144
1145
1146
1147
1148
	if (type == NL80211_IFTYPE_MESH_POINT &&
	    info->attrs[NL80211_ATTR_MESH_ID]) {
		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
	}

1149
	if (info->attrs[NL80211_ATTR_4ADDR]) {
1150
		params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1151
		err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1152
1153
1154
		if (err)
			goto unlock;
	}
1155

1156
1157
1158
	err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
				  info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
				  &flags);
1159
	err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1160
		nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1161
1162
		type, err ? NULL : &flags, &params);

1163
 unlock:
1164
	cfg80211_unlock_rdev(rdev);
Johannes Berg's avatar
Johannes Berg committed
1165
1166
 unlock_rtnl:
	rtnl_unlock();
1167
1168
1169
1170
1171
	return err;
}

static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
{
1172
	struct cfg80211_registered_device *rdev;
1173
	int err;
1174
1175
	struct net_device *dev;

Johannes Berg's avatar
Johannes Berg committed
1176
1177
	rtnl_lock();

1178
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1179
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1180
		goto unlock_rtnl;
1181

1182
	if (!rdev->ops->del_virtual_intf) {
1183
1184
1185
1186
		err = -EOPNOTSUPP;
		goto out;
	}

1187
	err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1188
1189

 out:
1190
	cfg80211_unlock_rdev(rdev);
1191
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1192
1193
 unlock_rtnl:
	rtnl_unlock();
1194
1195
1196
	return err;
}

1197
1198
1199
struct get_key_cookie {
	struct sk_buff *msg;
	int error;
1200
	int idx;
1201
1202
1203
1204
};

static void get_key_callback(void *c, struct key_params *params)
{
1205
	struct nlattr *key;
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
	struct get_key_cookie *cookie = c;

	if (params->key)
		NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
			params->key_len, params->key);

	if (params->seq)
		NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
			params->seq_len, params->seq);

	if (params->cipher)
		NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
			    params->cipher);

1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
	key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
	if (!key)
		goto nla_put_failure;

	if (params->key)
		NLA_PUT(cookie->msg, NL80211_KEY_DATA,
			params->key_len, params->key);

	if (params->seq)
		NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
			params->seq_len, params->seq);

	if (params->cipher)
		NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
			    params->cipher);

	NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);

	nla_nest_end(cookie->msg, key);

1240
1241
1242
1243
1244
1245
1246
	return;
 nla_put_failure:
	cookie->error = 1;
}

static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
{
1247
	struct cfg80211_registered_device *rdev;
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
	int err;
	struct net_device *dev;
	u8 key_idx = 0;
	u8 *mac_addr = NULL;
	struct get_key_cookie cookie = {
		.error = 0,
	};
	void *hdr;
	struct sk_buff *msg;

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

1261
	if (key_idx > 5)
1262
1263
1264
1265
1266
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_MAC])
		mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

Johannes Berg's avatar
Johannes Berg committed
1267
1268
	rtnl_lock();

1269
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1270
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1271
		goto unlock_rtnl;
1272

1273
	if (!rdev->ops->get_key) {
1274
1275
1276
1277
		err = -EOPNOTSUPP;
		goto out;
	}

1278
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
	if (!msg) {
		err = -ENOMEM;
		goto out;
	}

	hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
			     NL80211_CMD_NEW_KEY);

	if (IS_ERR(hdr)) {
		err = PTR_ERR(hdr);
Niko Jokinen's avatar
Niko Jokinen committed
1289
		goto free_msg;
1290
1291
1292
	}

	cookie.msg = msg;
1293
	cookie.idx = key_idx;
1294
1295
1296
1297
1298
1299

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
	NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
	if (mac_addr)
		NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);

1300
	err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1301
1302
1303
				&cookie, get_key_callback);

	if (err)
Niko Jokinen's avatar
Niko Jokinen committed
1304
		goto free_msg;
1305
1306
1307
1308
1309

	if (cookie.error)
		goto nla_put_failure;

	genlmsg_end(msg, hdr);
Johannes Berg's avatar
Johannes Berg committed
1310
	err = genlmsg_reply(msg, info);
1311
1312
1313
1314
	goto out;

 nla_put_failure:
	err = -ENOBUFS;
Niko Jokinen's avatar
Niko Jokinen committed
1315
 free_msg:
1316
1317
	nlmsg_free(msg);
 out:
1318
	cfg80211_unlock_rdev(rdev);