nl80211.c 114 KB
Newer Older
1 2 3
/*
 * This is the new netlink-based wireless configuration interface.
 *
4
 * Copyright 2006-2009	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 61 62 63
	}

	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,
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 73 74 75

	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
76 77

	[NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
78
	[NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
79

80
	[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
81 82 83 84 85
	[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 },
86
	[NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
87 88 89 90 91 92 93

	[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 },
94 95 96 97 98
	[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 },
99
	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
100
	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
Johannes Berg's avatar
Johannes Berg committed
101
	[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
102 103 104
	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_MESH_ID_LEN },
	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
105

106 107 108
	[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
	[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },

109 110 111
	[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 },
112 113
	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
					   .len = NL80211_MAX_SUPP_RATES },
114

115 116
	[NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },

117 118
	[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
					 .len = NL80211_HT_CAPABILITY_LEN },
119 120 121 122

	[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
	[NL80211_ATTR_IE] = { .type = NLA_BINARY,
			      .len = IEEE80211_MAX_DATA_LEN },
123 124
	[NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
	[NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
125 126 127 128 129

	[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
130
	[NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
131
	[NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
132
	[NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
133 134 135
	[NL80211_ATTR_STA_FLAGS2] = {
		.len = sizeof(struct nl80211_sta_flag_update),
	},
136
	[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
137 138 139
	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
140
	[NL80211_ATTR_PID] = { .type = NLA_U32 },
141 142
};

143 144 145
/* policy for the attributes */
static struct nla_policy
nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
Johannes Berg's avatar
Johannes Berg committed
146
	[NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
147 148 149 150 151 152 153
	[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 },
};

154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183
/* 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;
}

184 185 186 187 188 189 190 191
/* 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);
}

192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215
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;
}

216 217
/* netlink command implementations */

218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311
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
312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388
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;
}

389 390 391 392
static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
393 394 395
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
396
	struct nlattr *nl_modes;
397
	struct nlattr *nl_cmds;
398 399 400 401
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
402
	u16 ifmodes = dev->wiphy.interface_modes;
403 404 405 406 407

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

408
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
409
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
410 411 412 413 414 415 416 417 418 419

	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);

420 421
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
422 423
	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
		    dev->wiphy.max_scan_ie_len);
424

425 426 427 428
	NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
		sizeof(u32) * dev->wiphy.n_cipher_suites,
		dev->wiphy.cipher_suites);

429 430 431 432 433 434 435 436 437 438 439 440 441 442
	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);

443 444 445 446 447 448 449 450 451 452 453 454
	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;

455 456 457 458 459 460 461 462 463 464 465 466 467
		/* 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);
		}

468 469 470 471 472 473 474 475 476 477 478
		/* 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];
479 480 481

			if (nl80211_msg_put_channel(msg, chan))
				goto nla_put_failure;
482

483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513
			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);

514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534
	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);
535 536 537 538
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
Johannes Berg's avatar
Johannes Berg committed
539
	CMD(join_ibss, JOIN_IBSS);
540 541 542 543
	if (dev->wiphy.netnsok) {
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
	}
544 545

#undef CMD
546

547
	if (dev->ops->connect || dev->ops->auth) {
548 549 550 551
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
	}

552
	if (dev->ops->disconnect || dev->ops->deauth) {
553 554 555 556
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
	}

557 558
	nla_nest_end(msg, nl_cmds);

559 560 561
	return genlmsg_end(msg, hdr);

 nla_put_failure:
562 563
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
564 565 566 567 568 569 570 571
}

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;

572
	mutex_lock(&cfg80211_mutex);
573
	list_for_each_entry(dev, &cfg80211_rdev_list, list) {
574 575
		if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
			continue;
576
		if (++idx <= start)
577 578 579
			continue;
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
580 581
				       dev) < 0) {
			idx--;
582
			break;
583
		}
584
	}
585
	mutex_unlock(&cfg80211_mutex);
586 587 588 589 590 591 592 593 594 595 596 597 598 599 600

	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);

601
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
602 603 604 605 606 607
	if (!msg)
		goto out_err;

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

608
	cfg80211_unlock_rdev(dev);
609

Johannes Berg's avatar
Johannes Berg committed
610
	return genlmsg_reply(msg, info);
611 612 613 614

 out_free:
	nlmsg_free(msg);
 out_err:
615
	cfg80211_unlock_rdev(dev);
616 617 618
	return -ENOBUFS;
}

619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643
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;
}

644 645 646
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
647 648
	int result = 0, rem_txq_params = 0;
	struct nlattr *nl_txq_params;
649 650 651
	u32 changed;
	u8 retry_short = 0, retry_long = 0;
	u32 frag_threshold = 0, rts_threshold = 0;
652

653
	rtnl_lock();
654

655 656
	mutex_lock(&cfg80211_mutex);

657
	rdev = __cfg80211_rdev_from_info(info);
658
	if (IS_ERR(rdev)) {
659
		mutex_unlock(&cfg80211_mutex);
660 661 662 663 664 665 666
		result = PTR_ERR(rdev);
		goto unlock;
	}

	mutex_lock(&rdev->mtx);

	if (info->attrs[NL80211_ATTR_WIPHY_NAME])
667 668
		result = cfg80211_dev_rename(
			rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
669 670 671 672 673

	mutex_unlock(&cfg80211_mutex);

	if (result)
		goto bad_res;
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

	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;
		}
	}
701

702
	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
Sujith's avatar
Sujith committed
703
		enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
704
		struct ieee80211_channel *chan;
705
		struct ieee80211_sta_ht_cap *ht_cap;
706
		u32 freq;
707 708 709 710 711 712

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

713 714
		result = -EINVAL;

Sujith's avatar
Sujith committed
715 716 717 718 719 720 721
		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)
722 723 724 725 726
				goto bad_res;
		}

		freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
		chan = ieee80211_get_channel(&rdev->wiphy, freq);
727 728 729

		/* Primary channel not allowed */
		if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
730
			goto bad_res;
731

732 733
		if (channel_type == NL80211_CHAN_HT40MINUS &&
		    (chan->flags & IEEE80211_CHAN_NO_HT40MINUS))
734
			goto bad_res;
735 736
		else if (channel_type == NL80211_CHAN_HT40PLUS &&
			 (chan->flags & IEEE80211_CHAN_NO_HT40PLUS))
737 738
			goto bad_res;

739 740 741 742 743
		/*
		 * At this point we know if that if HT40 was requested
		 * we are allowed to use it and the extension channel
		 * exists.
		 */
744

745
		ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
746

747 748 749 750
		/* no HT capabilities or intolerant */
		if (channel_type != NL80211_CHAN_NO_HT) {
			if (!ht_cap->ht_supported)
				goto bad_res;
751 752 753
			if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
			    (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
				goto bad_res;
754 755 756
		}

		result = rdev->ops->set_channel(&rdev->wiphy, chan,
Sujith's avatar
Sujith committed
757
						channel_type);
758 759
		if (result)
			goto bad_res;
760 761

		rdev->channel = chan;
762 763
	}

764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
	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;
	}

	if (changed) {
		u8 old_retry_short, old_retry_long;
		u32 old_frag_threshold, old_rts_threshold;

		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;

		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;

		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;
		}
	}
842

843
 bad_res:
844 845 846
	mutex_unlock(&rdev->mtx);
 unlock:
	rtnl_unlock();
847 848 849 850 851
	return result;
}


static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
852
			      struct cfg80211_registered_device *rdev,
853 854 855 856 857 858 859 860 861
			      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);
862
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
863
	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
Johannes Berg's avatar
Johannes Berg committed
864
	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
865 866 867
	return genlmsg_end(msg, hdr);

 nla_put_failure:
868 869
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
870 871 872 873 874 875 876 877 878 879 880
}

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;

881
	mutex_lock(&cfg80211_mutex);
882
	list_for_each_entry(dev, &cfg80211_rdev_list, list) {
883 884
		if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
			continue;
Johannes Berg's avatar
Johannes Berg committed
885 886
		if (wp_idx < wp_start) {
			wp_idx++;
887
			continue;
Johannes Berg's avatar
Johannes Berg committed
888
		}
889 890 891 892
		if_idx = 0;

		mutex_lock(&dev->devlist_mtx);
		list_for_each_entry(wdev, &dev->netdev_list, list) {
Johannes Berg's avatar
Johannes Berg committed
893 894
			if (if_idx < if_start) {
				if_idx++;
895
				continue;
Johannes Berg's avatar
Johannes Berg committed
896
			}
897 898
			if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
					       cb->nlh->nlmsg_seq, NLM_F_MULTI,
899
					       dev, wdev->netdev) < 0) {
Johannes Berg's avatar
Johannes Berg committed
900 901 902 903
				mutex_unlock(&dev->devlist_mtx);
				goto out;
			}
			if_idx++;
904 905
		}
		mutex_unlock(&dev->devlist_mtx);
Johannes Berg's avatar
Johannes Berg committed
906 907

		wp_idx++;
908
	}
Johannes Berg's avatar
Johannes Berg committed
909
 out:
910
	mutex_unlock(&cfg80211_mutex);
911 912 913 914 915 916 917 918 919 920 921 922 923 924

	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;

925
	err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
926 927 928
	if (err)
		return err;

929
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
930 931 932
	if (!msg)
		goto out_err;

933 934
	if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
			       dev, netdev) < 0)
935 936 937
		goto out_free;

	dev_put(netdev);
938
	cfg80211_unlock_rdev(dev);
939

Johannes Berg's avatar
Johannes Berg committed
940
	return genlmsg_reply(msg, info);
941 942 943 944 945

 out_free:
	nlmsg_free(msg);
 out_err:
	dev_put(netdev);
946
	cfg80211_unlock_rdev(dev);
947 948 949
	return -ENOBUFS;
}

950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978
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;
}

979 980
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
981
	struct cfg80211_registered_device *rdev;
982
	struct vif_params params;
983
	int err;
Johannes Berg's avatar
Johannes Berg committed
984
	enum nl80211_iftype otype, ntype;
985
	struct net_device *dev;
986
	u32 _flags, *flags = NULL;
987
	bool change = false;
988

989 990
	memset(&params, 0, sizeof(params));

Johannes Berg's avatar
Johannes Berg committed
991 992
	rtnl_lock();

993
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
994
	if (err)
Johannes Berg's avatar
Johannes Berg committed
995 996
		goto unlock_rtnl;

Johannes Berg's avatar
Johannes Berg committed
997
	otype = ntype = dev->ieee80211_ptr->iftype;
998

999
	if (info->attrs[NL80211_ATTR_IFTYPE]) {
1000
		ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
Johannes Berg's avatar
Johannes Berg committed
1001
		if (otype != ntype)
1002
			change = true;
Johannes Berg's avatar
Johannes Berg committed
1003
		if (ntype > NL80211_IFTYPE_MAX) {
1004
			err = -EINVAL;
1005
			goto unlock;
1006
		}
1007 1008
	}

1009 1010
	if (!rdev->ops->change_virtual_intf ||
	    !(rdev->wiphy.interface_modes & (1 << ntype))) {
1011 1012 1013 1014
		err = -EOPNOTSUPP;
		goto unlock;
	}

1015
	if (info->attrs[NL80211_ATTR_MESH_ID]) {
Johannes Berg's avatar
Johannes Berg committed
1016
		if (ntype != NL80211_IFTYPE_MESH_POINT) {
1017 1018 1019
			err = -EINVAL;
			goto unlock;
		}
1020 1021
		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1022
		change = true;
1023 1024
	}

1025
	if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
Johannes Berg's avatar
Johannes Berg committed
1026
		if (ntype != NL80211_IFTYPE_MONITOR) {
1027 1028 1029 1030 1031
			err = -EINVAL;
			goto unlock;
		}
		err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
					  &_flags);
1032 1033 1034 1035 1036
		if (err)
			goto unlock;

		flags = &_flags;
		change = true;
1037
	}
Johannes Berg's avatar
Johannes Berg committed
1038

1039
	if (change)
1040
		err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev,
Johannes Berg's avatar
Johannes Berg committed
1041
						    ntype, flags, &params);
1042 1043
	else
		err = 0;
Johannes Berg's avatar
Johannes Berg committed
1044

1045
	WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
Johannes Berg's avatar
Johannes Berg committed
1046

1047
	if (!err && (ntype != otype)) {
Johannes Berg's avatar
Johannes Berg committed
1048
		if (otype == NL80211_IFTYPE_ADHOC)
1049
			cfg80211_clear_ibss(dev, false);
Johannes Berg's avatar
Johannes Berg committed
1050
	}
Johannes Berg's avatar
Johannes Berg committed
1051

1052
 unlock:
1053
	dev_put(dev);
1054
	cfg80211_unlock_rdev(rdev);
Johannes Berg's avatar
Johannes Berg committed
1055 1056
 unlock_rtnl:
	rtnl_unlock();
1057 1058 1059 1060 1061
	return err;
}

static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
1062
	struct cfg80211_registered_device *rdev;
1063
	struct vif_params params;
1064 1065
	int err;
	enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1066
	u32 flags;
1067

1068 1069
	memset(&params, 0, sizeof(params));

1070 1071 1072 1073 1074 1075 1076 1077 1078
	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
1079 1080
	rtnl_lock();

1081 1082 1083
	rdev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
Johannes Berg's avatar
Johannes Berg committed
1084 1085
		goto unlock_rtnl;
	}
1086

1087 1088
	if (!rdev->ops->add_virtual_intf ||
	    !(rdev->wiphy.interface_modes & (1 << type))) {
1089 1090 1091 1092
		err = -EOPNOTSUPP;
		goto unlock;
	}

1093 1094 1095 1096 1097 1098
	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]);
	}

1099 1100 1101
	err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
				  info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
				  &flags);
1102
	err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1103
		nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1104 1105
		type, err ? NULL : &flags, &params);

1106
 unlock:
1107
	cfg80211_unlock_rdev(rdev);
Johannes Berg's avatar
Johannes Berg committed
1108 1109
 unlock_rtnl:
	rtnl_unlock();
1110 1111 1112 1113 1114
	return err;
}

static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
{
1115
	struct cfg80211_registered_device *rdev;
1116
	int err;
1117 1118
	struct net_device *dev;

Johannes Berg's avatar
Johannes Berg committed
1119 1120
	rtnl_lock();