nl80211.c 82.2 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
/*
 * This is the new netlink-based wireless configuration interface.
 *
 * Copyright 2006, 2007	Johannes Berg <johannes@sipsolutions.net>
 */

#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
18
19
20
#include <net/genetlink.h>
#include <net/cfg80211.h>
#include "core.h"
#include "nl80211.h"
21
#include "reg.h"
22
23
24
25
26
27
28
29
30
31
32

/* 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,
};

/* internal helper: get drv and dev */
Johannes Berg's avatar
Johannes Berg committed
33
static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
34
35
36
37
38
				       struct cfg80211_registered_device **drv,
				       struct net_device **dev)
{
	int ifindex;

Johannes Berg's avatar
Johannes Berg committed
39
	if (!attrs[NL80211_ATTR_IFINDEX])
40
41
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
42
	ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
	*dev = dev_get_by_index(&init_net, ifindex);
	if (!*dev)
		return -ENODEV;

	*drv = cfg80211_get_dev_from_ifindex(ifindex);
	if (IS_ERR(*drv)) {
		dev_put(*dev);
		return PTR_ERR(*drv);
	}

	return 0;
}

/* policy for the attributes */
static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
				      .len = BUS_ID_SIZE-1 },
61
	[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
62
	[NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
Sujith's avatar
Sujith committed
63
	[NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
64
65
66
67

	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
68
69
70
71
72
73
74
75

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

	[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 },
76
77
78
79
80
81
82

	[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 },
83
84
85
86
87
	[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 },
88
	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
89
	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
Johannes Berg's avatar
Johannes Berg committed
90
	[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
91
92
93
	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_MESH_ID_LEN },
	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
94

95
96
97
	[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
	[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },

98
99
100
	[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 },
101
102
	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
					   .len = NL80211_MAX_SUPP_RATES },
103

104
105
	[NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },

106
107
	[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
					 .len = NL80211_HT_CAPABILITY_LEN },
108
109
110
111

	[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
	[NL80211_ATTR_IE] = { .type = NLA_BINARY,
			      .len = IEEE80211_MAX_DATA_LEN },
112
113
	[NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
	[NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
114
115
116
117
118

	[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 },
119
120
};

121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/* 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;
}

151
152
153
154
155
156
157
158
/* 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);
}

159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
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;
}

183
184
185
186
187
188
/* netlink command implementations */

static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
189
190
191
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
192
	struct nlattr *nl_modes;
193
	struct nlattr *nl_cmds;
194
195
196
197
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
198
	u16 ifmodes = dev->wiphy.interface_modes;
199
200
201
202
203

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

204
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
205
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
206
207
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
208
209
	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
		    dev->wiphy.max_scan_ie_len);
210

211
212
213
214
215
216
217
218
219
220
221
222
223
224
	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);

225
226
227
228
229
230
231
232
233
234
235
236
	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;

237
238
239
240
241
242
243
244
245
246
247
248
249
		/* 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);
		}

250
251
252
253
254
255
256
257
258
259
260
		/* 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];
261
262
263

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

296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
	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);
317
318
319
320
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
321
322
323
324

#undef CMD
	nla_nest_end(msg, nl_cmds);

325
326
327
	return genlmsg_end(msg, hdr);

 nla_put_failure:
328
329
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
330
331
332
333
334
335
336
337
}

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;

338
	mutex_lock(&cfg80211_mutex);
339
	list_for_each_entry(dev, &cfg80211_drv_list, list) {
340
		if (++idx <= start)
341
342
343
			continue;
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
344
345
				       dev) < 0) {
			idx--;
346
			break;
347
		}
348
	}
349
	mutex_unlock(&cfg80211_mutex);
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

	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);

	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!msg)
		goto out_err;

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

	cfg80211_put_dev(dev);

	return genlmsg_unicast(msg, info->snd_pid);

 out_free:
	nlmsg_free(msg);
 out_err:
	cfg80211_put_dev(dev);
	return -ENOBUFS;
}

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
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;
}

408
409
410
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
411
412
	int result = 0, rem_txq_params = 0;
	struct nlattr *nl_txq_params;
413

414
	rtnl_lock();
415

416
417
418
419
420
421
422
423
424
425
426
	mutex_lock(&cfg80211_mutex);

	rdev = __cfg80211_drv_from_info(info);
	if (IS_ERR(rdev)) {
		result = PTR_ERR(rdev);
		goto unlock;
	}

	mutex_lock(&rdev->mtx);

	if (info->attrs[NL80211_ATTR_WIPHY_NAME])
427
428
		result = cfg80211_dev_rename(
			rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
429
430
431
432
433

	mutex_unlock(&cfg80211_mutex);

	if (result)
		goto bad_res;
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460

	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;
		}
	}
461

462
	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
Sujith's avatar
Sujith committed
463
		enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
464
		struct ieee80211_channel *chan;
465
		struct ieee80211_sta_ht_cap *ht_cap;
466
467
468
469
470
471
472
		u32 freq, sec_freq;

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

473
474
		result = -EINVAL;

Sujith's avatar
Sujith committed
475
476
477
478
479
480
481
		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)
482
483
484
485
486
				goto bad_res;
		}

		freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
		chan = ieee80211_get_channel(&rdev->wiphy, freq);
487
488
489

		/* Primary channel not allowed */
		if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
490
			goto bad_res;
491

Sujith's avatar
Sujith committed
492
		if (channel_type == NL80211_CHAN_HT40MINUS)
493
			sec_freq = freq - 20;
Sujith's avatar
Sujith committed
494
		else if (channel_type == NL80211_CHAN_HT40PLUS)
495
496
497
498
			sec_freq = freq + 20;
		else
			sec_freq = 0;

499
500
501
		ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;

		/* no HT capabilities */
Sujith's avatar
Sujith committed
502
		if (channel_type != NL80211_CHAN_NO_HT &&
503
504
505
		    !ht_cap->ht_supported)
			goto bad_res;

506
507
		if (sec_freq) {
			struct ieee80211_channel *schan;
508
509
510
511
512
513

			/* no 40 MHz capabilities */
			if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
			    (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
				goto bad_res;

514
			schan = ieee80211_get_channel(&rdev->wiphy, sec_freq);
515
516
517

			/* Secondary channel not allowed */
			if (!schan || schan->flags & IEEE80211_CHAN_DISABLED)
518
519
520
521
				goto bad_res;
		}

		result = rdev->ops->set_channel(&rdev->wiphy, chan,
Sujith's avatar
Sujith committed
522
						channel_type);
523
524
525
526
527
		if (result)
			goto bad_res;
	}


528
 bad_res:
529
530
531
	mutex_unlock(&rdev->mtx);
 unlock:
	rtnl_unlock();
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
	return result;
}


static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      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);
	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
Johannes Berg's avatar
Johannes Berg committed
547
	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
548
549
550
	return genlmsg_end(msg, hdr);

 nla_put_failure:
551
552
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
553
554
555
556
557
558
559
560
561
562
563
}

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];
	struct cfg80211_registered_device *dev;
	struct wireless_dev *wdev;

564
	mutex_lock(&cfg80211_mutex);
565
	list_for_each_entry(dev, &cfg80211_drv_list, list) {
Johannes Berg's avatar
Johannes Berg committed
566
567
		if (wp_idx < wp_start) {
			wp_idx++;
568
			continue;
Johannes Berg's avatar
Johannes Berg committed
569
		}
570
571
572
573
		if_idx = 0;

		mutex_lock(&dev->devlist_mtx);
		list_for_each_entry(wdev, &dev->netdev_list, list) {
Johannes Berg's avatar
Johannes Berg committed
574
575
			if (if_idx < if_start) {
				if_idx++;
576
				continue;
Johannes Berg's avatar
Johannes Berg committed
577
			}
578
579
			if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
					       cb->nlh->nlmsg_seq, NLM_F_MULTI,
Johannes Berg's avatar
Johannes Berg committed
580
581
582
583
584
					       wdev->netdev) < 0) {
				mutex_unlock(&dev->devlist_mtx);
				goto out;
			}
			if_idx++;
585
586
		}
		mutex_unlock(&dev->devlist_mtx);
Johannes Berg's avatar
Johannes Berg committed
587
588

		wp_idx++;
589
	}
Johannes Berg's avatar
Johannes Berg committed
590
 out:
591
	mutex_unlock(&cfg80211_mutex);
592
593
594
595
596
597
598
599
600
601
602
603
604
605

	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;

Johannes Berg's avatar
Johannes Berg committed
606
	err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
	if (err)
		return err;

	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!msg)
		goto out_err;

	if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
		goto out_free;

	dev_put(netdev);
	cfg80211_put_dev(dev);

	return genlmsg_unicast(msg, info->snd_pid);

 out_free:
	nlmsg_free(msg);
 out_err:
	dev_put(netdev);
	cfg80211_put_dev(dev);
	return -ENOBUFS;
}

630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
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;
}

659
660
661
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
662
	struct vif_params params;
663
664
665
	int err, ifindex;
	enum nl80211_iftype type;
	struct net_device *dev;
666
	u32 _flags, *flags = NULL;
667
	bool change = false;
668

669
670
	memset(&params, 0, sizeof(params));

Johannes Berg's avatar
Johannes Berg committed
671
672
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
673
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
674
	if (err)
Johannes Berg's avatar
Johannes Berg committed
675
676
		goto unlock_rtnl;

677
	ifindex = dev->ifindex;
678
	type = dev->ieee80211_ptr->iftype;
679
680
	dev_put(dev);

681
	if (info->attrs[NL80211_ATTR_IFTYPE]) {
682
683
684
685
686
687
688
689
		enum nl80211_iftype ntype;

		ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
		if (type != ntype)
			change = true;
		type = ntype;
		if (type > NL80211_IFTYPE_MAX) {
			err = -EINVAL;
690
			goto unlock;
691
		}
692
693
	}

694
695
	if (!drv->ops->change_virtual_intf ||
	    !(drv->wiphy.interface_modes & (1 << type))) {
696
697
698
699
		err = -EOPNOTSUPP;
		goto unlock;
	}

700
701
702
703
704
	if (info->attrs[NL80211_ATTR_MESH_ID]) {
		if (type != NL80211_IFTYPE_MESH_POINT) {
			err = -EINVAL;
			goto unlock;
		}
705
706
		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
707
		change = true;
708
709
	}

710
711
712
713
714
715
716
	if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
		if (type != NL80211_IFTYPE_MONITOR) {
			err = -EINVAL;
			goto unlock;
		}
		err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
					  &_flags);
717
718
719
720
721
		if (err)
			goto unlock;

		flags = &_flags;
		change = true;
722
	}
Johannes Berg's avatar
Johannes Berg committed
723

724
725
726
727
728
	if (change)
		err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
						    type, flags, &params);
	else
		err = 0;
Johannes Berg's avatar
Johannes Berg committed
729
730
731
732

	dev = __dev_get_by_index(&init_net, ifindex);
	WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));

733
734
 unlock:
	cfg80211_put_dev(drv);
Johannes Berg's avatar
Johannes Berg committed
735
736
 unlock_rtnl:
	rtnl_unlock();
737
738
739
740
741
742
	return err;
}

static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
743
	struct vif_params params;
744
745
	int err;
	enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
746
	u32 flags;
747

748
749
	memset(&params, 0, sizeof(params));

750
751
752
753
754
755
756
757
758
	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
759
760
	rtnl_lock();

761
	drv = cfg80211_get_dev_from_info(info);
Johannes Berg's avatar
Johannes Berg committed
762
763
764
765
	if (IS_ERR(drv)) {
		err = PTR_ERR(drv);
		goto unlock_rtnl;
	}
766

767
768
	if (!drv->ops->add_virtual_intf ||
	    !(drv->wiphy.interface_modes & (1 << type))) {
769
770
771
772
		err = -EOPNOTSUPP;
		goto unlock;
	}

773
774
775
776
777
778
	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]);
	}

779
780
781
	err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
				  info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
				  &flags);
782
	err = drv->ops->add_virtual_intf(&drv->wiphy,
783
		nla_data(info->attrs[NL80211_ATTR_IFNAME]),
784
785
		type, err ? NULL : &flags, &params);

786
787
 unlock:
	cfg80211_put_dev(drv);
Johannes Berg's avatar
Johannes Berg committed
788
789
 unlock_rtnl:
	rtnl_unlock();
790
791
792
793
794
795
796
797
798
	return err;
}

static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int ifindex, err;
	struct net_device *dev;

Johannes Berg's avatar
Johannes Berg committed
799
800
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
801
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
802
	if (err)
Johannes Berg's avatar
Johannes Berg committed
803
		goto unlock_rtnl;
804
805
806
807
808
809
810
811
812
813
814
815
	ifindex = dev->ifindex;
	dev_put(dev);

	if (!drv->ops->del_virtual_intf) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);

 out:
	cfg80211_put_dev(drv);
Johannes Berg's avatar
Johannes Berg committed
816
817
 unlock_rtnl:
	rtnl_unlock();
818
819
820
	return err;
}

821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
struct get_key_cookie {
	struct sk_buff *msg;
	int error;
};

static void get_key_callback(void *c, struct key_params *params)
{
	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);

	return;
 nla_put_failure:
	cookie->error = 1;
}

static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	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]);

863
	if (key_idx > 5)
864
865
866
867
868
		return -EINVAL;

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

Johannes Berg's avatar
Johannes Berg committed
869
870
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
871
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
872
	if (err)
Johannes Berg's avatar
Johannes Berg committed
873
		goto unlock_rtnl;
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919

	if (!drv->ops->get_key) {
		err = -EOPNOTSUPP;
		goto out;
	}

	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	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);
		goto out;
	}

	cookie.msg = msg;

	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);

	err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
				&cookie, get_key_callback);

	if (err)
		goto out;

	if (cookie.error)
		goto nla_put_failure;

	genlmsg_end(msg, hdr);
	err = genlmsg_unicast(msg, info->snd_pid);
	goto out;

 nla_put_failure:
	err = -ENOBUFS;
	nlmsg_free(msg);
 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
920
921
922
 unlock_rtnl:
	rtnl_unlock();

923
924
925
926
927
928
929
930
931
	return err;
}

static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	u8 key_idx;
932
933
	int (*func)(struct wiphy *wiphy, struct net_device *netdev,
		    u8 key_index);
934
935
936
937
938
939

	if (!info->attrs[NL80211_ATTR_KEY_IDX])
		return -EINVAL;

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

940
941
942
943
	if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) {
		if (key_idx < 4 || key_idx > 5)
			return -EINVAL;
	} else if (key_idx > 3)
944
945
946
		return -EINVAL;

	/* currently only support setting default key */
947
948
	if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] &&
	    !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT])
949
950
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
951
952
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
953
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
954
	if (err)
Johannes Berg's avatar
Johannes Berg committed
955
		goto unlock_rtnl;
956

957
958
959
960
961
962
	if (info->attrs[NL80211_ATTR_KEY_DEFAULT])
		func = drv->ops->set_default_key;
	else
		func = drv->ops->set_default_mgmt_key;

	if (!func) {
963
964
965
966
		err = -EOPNOTSUPP;
		goto out;
	}

967
	err = func(&drv->wiphy, dev, key_idx);
968
969
970
971

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
972
973
974
975

 unlock_rtnl:
	rtnl_unlock();

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
1004
1005
	return err;
}

static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	struct key_params params;
	u8 key_idx = 0;
	u8 *mac_addr = NULL;

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

	if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_KEY_DATA]) {
		params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
		params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
	}

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

	params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);

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

1006
	if (key_idx > 5)
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
		return -EINVAL;

	/*
	 * Disallow pairwise keys with non-zero index unless it's WEP
	 * (because current deployments use pairwise WEP keys with
	 * non-zero indizes but 802.11i clearly specifies to use zero)
	 */
	if (mac_addr && key_idx &&
	    params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
	    params.cipher != WLAN_CIPHER_SUITE_WEP104)
		return -EINVAL;

	/* TODO: add definitions for the lengths to linux/ieee80211.h */
	switch (params.cipher) {
	case WLAN_CIPHER_SUITE_WEP40:
		if (params.key_len != 5)
			return -EINVAL;
		break;
	case WLAN_CIPHER_SUITE_TKIP:
		if (params.key_len != 32)
			return -EINVAL;
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		if (params.key_len != 16)
			return -EINVAL;
		break;
	case WLAN_CIPHER_SUITE_WEP104:
		if (params.key_len != 13)
			return -EINVAL;
		break;
1037
1038
1039
1040
	case WLAN_CIPHER_SUITE_AES_CMAC:
		if (params.key_len != 16)
			return -EINVAL;
		break;
1041
1042
1043
1044
	default:
		return -EINVAL;
	}

Johannes Berg's avatar
Johannes Berg committed
1045
1046
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
1047
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1048
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1049
		goto unlock_rtnl;
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060

	if (!drv->ops->add_key) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1061
1062
1063
 unlock_rtnl:
	rtnl_unlock();

1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
	return err;
}

static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	u8 key_idx = 0;
	u8 *mac_addr = NULL;

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

1078
	if (key_idx > 5)
1079
1080
1081
1082
1083
		return -EINVAL;

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

Johannes Berg's avatar
Johannes Berg committed
1084
1085
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
1086
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1087
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1088
		goto unlock_rtnl;
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099

	if (!drv->ops->del_key) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1100
1101
1102
1103

 unlock_rtnl:
	rtnl_unlock();

1104
1105
1106
	return err;
}

1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
{
        int (*call)(struct wiphy *wiphy, struct net_device *dev,
		    struct beacon_parameters *info);
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	struct beacon_parameters params;
	int haveinfo = 0;

1117
1118
1119
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
1120
1121
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
1122
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1123
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1124
		goto unlock_rtnl;
1125

1126
1127
1128
1129
1130
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}

1131
1132
1133
1134
1135
1136
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
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
	switch (info->genlhdr->cmd) {
	case NL80211_CMD_NEW_BEACON:
		/* these are required for NEW_BEACON */
		if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
		    !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
		    !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
			err = -EINVAL;
			goto out;
		}

		call = drv->ops->add_beacon;
		break;
	case NL80211_CMD_SET_BEACON:
		call = drv->ops->set_beacon;
		break;
	default:
		WARN_ON(1);
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!call) {
		err = -EOPNOTSUPP;
		goto out;
	}

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

	if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
		params.interval =
		    nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
		haveinfo = 1;
	}

	if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
		params.dtim_period =
		    nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
		haveinfo = 1;
	}

	if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
		params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
		params.head_len =
		    nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
		haveinfo = 1;
	}

	if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
		params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
		params.tail_len =
		    nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
		haveinfo = 1;
	}

	if (!haveinfo) {
		err = -EINVAL;
		goto out;
	}

	err = call(&drv->wiphy, dev, &params);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1195
1196
1197
 unlock_rtnl:
	rtnl_unlock();

1198
1199
1200
1201
1202
1203
1204
1205
1206
	return err;
}

static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;

Johannes Berg's avatar
Johannes Berg committed
1207
1208
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
1209
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1210
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1211
		goto unlock_rtnl;
1212
1213
1214
1215
1216
1217

	if (!drv->ops->del_beacon) {
		err = -EOPNOTSUPP;
		goto out;
	}

1218
1219
1220
1221
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}
1222
1223
1224
1225
1226
	err = drv->ops->del_beacon(&drv->wiphy, dev);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1227
1228
1229
 unlock_rtnl:
	rtnl_unlock();

1230
1231
1232
	return err;
}

1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
	[NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
	[NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
	[NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
};

static int parse_station_flags(struct nlattr *nla, u32 *staflags)
{
	struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
	int flag;

	*staflags = 0;

	if (!nla)
		return 0;

	if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
			     nla, sta_flags_policy))
		return -EINVAL;

	*staflags = STATION_FLAG_CHANGED;

	for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
		if (flags[flag])
			*staflags |= (1<<flag);

	return 0;
}

1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
static u16 nl80211_calculate_bitrate(struct rate_info *rate)
{
	int modulation, streams, bitrate;

	if (!(rate->flags & RATE_INFO_FLAGS_MCS))
		return rate->legacy;

	/* the formula below does only work for MCS values smaller than 32 */
	if (rate->mcs >= 32)
		return 0;

	modulation = rate->mcs & 7;
	streams = (rate->mcs >> 3) + 1;

	bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
			13500000 : 6500000;

	if (modulation < 4)
		bitrate *= (modulation + 1);
	else if (modulation == 4)
		bitrate *= (modulation + 2);
	else
		bitrate *= (modulation + 3);

	bitrate *= streams;

	if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
		bitrate = (bitrate / 9) * 10;

	/* do NOT round down here */
	return (bitrate + 50000) / 100000;
}

1295
1296
static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
				int flags, struct net_device *dev,
1297
				u8 *mac_addr, struct station_info *sinfo)
1298
1299
{
	void *hdr;
1300
1301
	struct nlattr *sinfoattr, *txrate;
	u16 bitrate;
1302
1303
1304
1305
1306
1307
1308
1309

	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
	if (!hdr)
		return -1;

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);

1310
1311
	sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
	if (!sinfoattr)
1312
		goto nla_put_failure;
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
	if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
		NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
			    sinfo->inactive_time);
	if (sinfo->filled & STATION_INFO_RX_BYTES)
		NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
			    sinfo->rx_bytes);
	if (sinfo->filled & STATION_INFO_TX_BYTES)
		NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
			    sinfo->tx_bytes);
	if (sinfo->filled & STATION_INFO_LLID)
		NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
			    sinfo->llid);
	if (sinfo->filled & STATION_INFO_PLID)
		NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
			    sinfo->plid);
	if (sinfo->filled & STATION_INFO_PLINK_STATE)
		NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
			    sinfo->plink_state);
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
	if (sinfo->filled & STATION_INFO_SIGNAL)
		NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
			   sinfo->signal);
	if (sinfo->filled & STATION_INFO_TX_BITRATE) {
		txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
		if (!txrate)
			goto nla_put_failure;

		/* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
		bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
		if (bitrate > 0)
			NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1343

1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
		if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
			NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
				    sinfo->txrate.mcs);
		if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
			NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
		if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
			NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);

		nla_nest_end(msg, txrate);
	}
1354
1355
1356
1357
1358
1359
	if (sinfo->filled & STATION_INFO_RX_PACKETS)
		NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
			    sinfo->rx_packets);
	if (sinfo->filled & STATION_INFO_TX_PACKETS)
		NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
			    sinfo->tx_packets);
1360
	nla_nest_end(msg, sinfoattr);
1361
1362
1363
1364

	return genlmsg_end(msg, hdr);

 nla_put_failure:
1365
1366
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
1367
1368
}

1369
static int nl80211_dump_station(struct sk_buff *skb,
Johannes Berg's avatar
Johannes Berg committed
1370
				struct netlink_callback *cb)
1371
1372
1373
{
	struct station_info sinfo;
	struct cfg80211_registered_device *dev;
Johannes Berg's avatar
Johannes Berg committed
1374
	struct net_device *netdev;
1375
	u8 mac_addr[ETH_ALEN];
Johannes Berg's avatar
Johannes Berg committed
1376
1377
	int ifidx = cb->args[0];
	int sta_idx = cb->args[1];
1378
1379
	int err;

Johannes Berg's avatar
Johannes Berg committed
1380
1381
1382
1383
1384
1385
	if (!ifidx) {
		err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
				  nl80211_fam.attrbuf, nl80211_fam.maxattr,
				  nl80211_policy);
		if (err)
			return err;
1386

Johannes Berg's avatar
Johannes Berg committed
1387
1388
		if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
			return -EINVAL;
1389

Johannes Berg's avatar
Johannes Berg committed
1390
1391
1392
		ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
		if (!ifidx)
			return -EINVAL;
1393
1394
	}

Johannes Berg's avatar
Johannes Berg committed
1395
1396
1397
1398
1399
1400
1401
	rtnl_lock();

	netdev = __dev_get_by_index(&init_net, ifidx);
	if (!netdev) {
		err = -ENODEV;
		goto out_rtnl;
	}
1402

Johannes Berg's avatar
Johannes Berg committed
1403
1404
1405
	dev = cfg80211_get_dev_from_ifindex(ifidx);
	if (IS_ERR(dev)) {
		err = PTR_ERR(dev);
Johannes Berg's avatar
Johannes Berg committed
1406
		goto out_rtnl;
Johannes Berg's avatar
Johannes Berg committed
1407
1408
1409
	}

	if (!dev->ops->dump_station) {
1410
		err = -EOPNOTSUPP;
Johannes Berg's avatar
Johannes Berg committed
1411
1412
1413
1414
1415
1416
1417
1418
1419
		goto out_err;
	}

	while (1) {
		err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
					     mac_addr, &sinfo);
		if (err == -ENOENT)
			break;
		if (err)
Johannes Berg's avatar
Johannes Berg committed
1420
			goto out_err;
Johannes Berg's avatar
Johannes Berg committed
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437

		if (nl80211_send_station(skb,
				NETLINK_CB(cb->skb).pid,
				cb->nlh->nlmsg_seq, NLM_F_MULTI,
				netdev, mac_addr,
				&sinfo) < 0)
			goto out;

		sta_idx++;
	}


 out:
	cb->args[1] = sta_idx;
	err = skb->len;
 out_err:
	cfg80211_put_dev(dev);
Johannes Berg's avatar
Johannes Berg committed
1438
1439
 out_rtnl:
	rtnl_unlock();
Johannes Berg's avatar
Johannes Berg committed
1440
1441

	return err;
1442
}
1443

1444
1445
static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
{
1446
1447
1448
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
1449
	struct station_info sinfo;
1450
1451
1452
	struct sk_buff *msg;
	u8 *mac_addr = NULL;

1453
	memset(&sinfo, 0, sizeof(sinfo));
1454
1455
1456
1457
1458
1459

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

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

Johannes Berg's avatar
Johannes Berg committed
1460
1461
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
1462
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1463
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1464
		goto out_rtnl;
1465
1466
1467
1468
1469
1470

	if (!drv->ops->get_station) {
		err = -EOPNOTSUPP;
		goto out;
	}

1471
1472
1473
1474
	err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
	if (err)
		goto out;

1475
1476
1477
1478
1479
	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!msg)
		goto out;

	if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1480
				 dev, mac_addr, &sinfo) < 0)
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
		goto out_free;

	err = genlmsg_unicast(msg, info->snd_pid);
	goto out;

 out_free:
	nlmsg_free(msg);
 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1491
1492
1493
 out_rtnl:
	rtnl_unlock();

1494
	return err;
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
}

/*
 * Get vlan interface making sure it is on the right wiphy.
 */
static int get_vlan(struct nlattr *vlanattr,
		    struct cfg80211_registered_device *rdev,
		    struct net_device **vlan)
{
	*vlan = NULL;

	if (vlanattr) {
		*vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
		if (!*vlan)
			return -ENODEV;
		if (!(*vlan)->ieee80211_ptr)
			return -EINVAL;
		if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
			return -EINVAL;
	}
	return 0;
}

static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
	int err;
	struct net_device *dev;
	struct station_parameters params;
	u8 *mac_addr = NULL;

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

	params.listen_interval = -1;

	if (info->attrs[NL80211_ATTR_STA_AID])
		return -EINVAL;

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

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

	if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
		params.supported_rates =
			nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
		params.supported_rates_len =
			nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
	}

	if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
		params.listen_interval =
		    nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);

1549
1550
1551
1552
	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
		params.ht_capa =
			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);

1553
1554