nl80211.c 80.7 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;
}

151 152 153 154 155 156 157 158 159 160 161 162 163 164
/* 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);
}

/* 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;
165 166 167
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
168
	struct nlattr *nl_modes;
169
	struct nlattr *nl_cmds;
170 171 172 173
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
174
	u16 ifmodes = dev->wiphy.interface_modes;
175 176 177 178 179

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

180
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
181
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
182 183
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
184

185 186 187 188 189 190 191 192 193 194 195 196 197 198
	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);

199 200 201 202 203 204 205 206 207 208 209 210
	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;

211 212 213 214 215 216 217 218 219 220 221 222 223
		/* 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);
		}

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

247 248
			NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
				    DBM_TO_MBM(chan->max_power));
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
			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);

281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301
	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);
302 303 304 305
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
306 307 308 309

#undef CMD
	nla_nest_end(msg, nl_cmds);

310 311 312
	return genlmsg_end(msg, hdr);

 nla_put_failure:
313 314
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
315 316 317 318 319 320 321 322
}

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;

323
	mutex_lock(&cfg80211_mutex);
324
	list_for_each_entry(dev, &cfg80211_drv_list, list) {
325
		if (++idx <= start)
326 327 328
			continue;
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
329 330
				       dev) < 0) {
			idx--;
331
			break;
332
		}
333
	}
334
	mutex_unlock(&cfg80211_mutex);
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

	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;
}

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
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;
}

393 394 395
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
396 397
	int result = 0, rem_txq_params = 0;
	struct nlattr *nl_txq_params;
398

399
	rtnl_lock();
400

401 402 403 404 405 406 407 408 409 410 411
	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])
412 413
		result = cfg80211_dev_rename(
			rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
414 415 416 417 418

	mutex_unlock(&cfg80211_mutex);

	if (result)
		goto bad_res;
419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445

	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;
		}
	}
446

447
	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
Sujith's avatar
Sujith committed
448
		enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
449
		struct ieee80211_channel *chan;
450
		struct ieee80211_sta_ht_cap *ht_cap;
451 452 453 454 455 456 457
		u32 freq, sec_freq;

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

458 459
		result = -EINVAL;

Sujith's avatar
Sujith committed
460 461 462 463 464 465 466
		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)
467 468 469 470 471
				goto bad_res;
		}

		freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
		chan = ieee80211_get_channel(&rdev->wiphy, freq);
472 473 474

		/* Primary channel not allowed */
		if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
475
			goto bad_res;
476

Sujith's avatar
Sujith committed
477
		if (channel_type == NL80211_CHAN_HT40MINUS)
478
			sec_freq = freq - 20;
Sujith's avatar
Sujith committed
479
		else if (channel_type == NL80211_CHAN_HT40PLUS)
480 481 482 483
			sec_freq = freq + 20;
		else
			sec_freq = 0;

484 485 486
		ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;

		/* no HT capabilities */
Sujith's avatar
Sujith committed
487
		if (channel_type != NL80211_CHAN_NO_HT &&
488 489 490
		    !ht_cap->ht_supported)
			goto bad_res;

491 492
		if (sec_freq) {
			struct ieee80211_channel *schan;
493 494 495 496 497 498

			/* 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;

499
			schan = ieee80211_get_channel(&rdev->wiphy, sec_freq);
500 501 502

			/* Secondary channel not allowed */
			if (!schan || schan->flags & IEEE80211_CHAN_DISABLED)
503 504 505 506
				goto bad_res;
		}

		result = rdev->ops->set_channel(&rdev->wiphy, chan,
Sujith's avatar
Sujith committed
507
						channel_type);
508 509 510 511 512
		if (result)
			goto bad_res;
	}


513
 bad_res:
514 515 516
	mutex_unlock(&rdev->mtx);
 unlock:
	rtnl_unlock();
517 518 519 520 521 522 523 524 525 526 527 528 529 530 531
	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
532
	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
533 534 535
	return genlmsg_end(msg, hdr);

 nla_put_failure:
536 537
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
538 539 540 541 542 543 544 545 546 547 548
}

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;

549
	mutex_lock(&cfg80211_mutex);
550
	list_for_each_entry(dev, &cfg80211_drv_list, list) {
Johannes Berg's avatar
Johannes Berg committed
551 552
		if (wp_idx < wp_start) {
			wp_idx++;
553
			continue;
Johannes Berg's avatar
Johannes Berg committed
554
		}
555 556 557 558
		if_idx = 0;

		mutex_lock(&dev->devlist_mtx);
		list_for_each_entry(wdev, &dev->netdev_list, list) {
Johannes Berg's avatar
Johannes Berg committed
559 560
			if (if_idx < if_start) {
				if_idx++;
561
				continue;
Johannes Berg's avatar
Johannes Berg committed
562
			}
563 564
			if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
					       cb->nlh->nlmsg_seq, NLM_F_MULTI,
Johannes Berg's avatar
Johannes Berg committed
565 566 567 568 569
					       wdev->netdev) < 0) {
				mutex_unlock(&dev->devlist_mtx);
				goto out;
			}
			if_idx++;
570 571
		}
		mutex_unlock(&dev->devlist_mtx);
Johannes Berg's avatar
Johannes Berg committed
572 573

		wp_idx++;
574
	}
Johannes Berg's avatar
Johannes Berg committed
575
 out:
576
	mutex_unlock(&cfg80211_mutex);
577 578 579 580 581 582 583 584 585 586 587 588 589 590

	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
591
	err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614
	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;
}

615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643
static const struct nla_policy 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;
}

644 645 646
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
647
	struct vif_params params;
648 649 650
	int err, ifindex;
	enum nl80211_iftype type;
	struct net_device *dev;
651
	u32 _flags, *flags = NULL;
652
	bool change = false;
653

654 655
	memset(&params, 0, sizeof(params));

Johannes Berg's avatar
Johannes Berg committed
656 657
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
658
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
659
	if (err)
Johannes Berg's avatar
Johannes Berg committed
660 661
		goto unlock_rtnl;

662
	ifindex = dev->ifindex;
663
	type = dev->ieee80211_ptr->iftype;
664 665
	dev_put(dev);

666
	if (info->attrs[NL80211_ATTR_IFTYPE]) {
667 668 669 670 671 672 673 674
		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;
675
			goto unlock;
676
		}
677 678
	}

679 680
	if (!drv->ops->change_virtual_intf ||
	    !(drv->wiphy.interface_modes & (1 << type))) {
681 682 683 684
		err = -EOPNOTSUPP;
		goto unlock;
	}

685 686 687 688 689
	if (info->attrs[NL80211_ATTR_MESH_ID]) {
		if (type != NL80211_IFTYPE_MESH_POINT) {
			err = -EINVAL;
			goto unlock;
		}
690 691
		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
692
		change = true;
693 694
	}

695 696 697 698 699 700 701
	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);
702 703 704 705 706
		if (err)
			goto unlock;

		flags = &_flags;
		change = true;
707
	}
Johannes Berg's avatar
Johannes Berg committed
708

709 710 711 712 713
	if (change)
		err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
						    type, flags, &params);
	else
		err = 0;
Johannes Berg's avatar
Johannes Berg committed
714 715 716 717

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

718 719
 unlock:
	cfg80211_put_dev(drv);
Johannes Berg's avatar
Johannes Berg committed
720 721
 unlock_rtnl:
	rtnl_unlock();
722 723 724 725 726 727
	return err;
}

static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *drv;
728
	struct vif_params params;
729 730
	int err;
	enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
731
	u32 flags;
732

733 734
	memset(&params, 0, sizeof(params));

735 736 737 738 739 740 741 742 743
	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
744 745
	rtnl_lock();

746
	drv = cfg80211_get_dev_from_info(info);
Johannes Berg's avatar
Johannes Berg committed
747 748 749 750
	if (IS_ERR(drv)) {
		err = PTR_ERR(drv);
		goto unlock_rtnl;
	}
751

752 753
	if (!drv->ops->add_virtual_intf ||
	    !(drv->wiphy.interface_modes & (1 << type))) {
754 755 756 757
		err = -EOPNOTSUPP;
		goto unlock;
	}

758 759 760 761 762 763
	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]);
	}

764 765 766
	err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
				  info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
				  &flags);
767
	err = drv->ops->add_virtual_intf(&drv->wiphy,
768
		nla_data(info->attrs[NL80211_ATTR_IFNAME]),
769 770
		type, err ? NULL : &flags, &params);

771 772
 unlock:
	cfg80211_put_dev(drv);
Johannes Berg's avatar
Johannes Berg committed
773 774
 unlock_rtnl:
	rtnl_unlock();
775 776 777 778 779 780 781 782 783
	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
784 785
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
786
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
787
	if (err)
Johannes Berg's avatar
Johannes Berg committed
788
		goto unlock_rtnl;
789 790 791 792 793 794 795 796 797 798 799 800
	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
801 802
 unlock_rtnl:
	rtnl_unlock();
803 804 805
	return err;
}

806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847
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]);

848
	if (key_idx > 5)
849 850 851 852 853
		return -EINVAL;

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

Johannes Berg's avatar
Johannes Berg committed
854 855
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
856
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
857
	if (err)
Johannes Berg's avatar
Johannes Berg committed
858
		goto unlock_rtnl;
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904

	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
905 906 907
 unlock_rtnl:
	rtnl_unlock();

908 909 910 911 912 913 914 915 916
	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;
917 918
	int (*func)(struct wiphy *wiphy, struct net_device *netdev,
		    u8 key_index);
919 920 921 922 923 924

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

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

925 926 927 928
	if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) {
		if (key_idx < 4 || key_idx > 5)
			return -EINVAL;
	} else if (key_idx > 3)
929 930 931
		return -EINVAL;

	/* currently only support setting default key */
932 933
	if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] &&
	    !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT])
934 935
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
936 937
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
938
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
939
	if (err)
Johannes Berg's avatar
Johannes Berg committed
940
		goto unlock_rtnl;
941

942 943 944 945 946 947
	if (info->attrs[NL80211_ATTR_KEY_DEFAULT])
		func = drv->ops->set_default_key;
	else
		func = drv->ops->set_default_mgmt_key;

	if (!func) {
948 949 950 951
		err = -EOPNOTSUPP;
		goto out;
	}

952
	err = func(&drv->wiphy, dev, key_idx);
953 954 955 956

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
957 958 959 960

 unlock_rtnl:
	rtnl_unlock();

961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990
	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]);

991
	if (key_idx > 5)
992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
		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;
1022 1023 1024 1025
	case WLAN_CIPHER_SUITE_AES_CMAC:
		if (params.key_len != 16)
			return -EINVAL;
		break;
1026 1027 1028 1029
	default:
		return -EINVAL;
	}

Johannes Berg's avatar
Johannes Berg committed
1030 1031
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
1032
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1033
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1034
		goto unlock_rtnl;
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045

	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
1046 1047 1048
 unlock_rtnl:
	rtnl_unlock();

1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
	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]);

1063
	if (key_idx > 5)
1064 1065 1066 1067 1068
		return -EINVAL;

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

Johannes Berg's avatar
Johannes Berg committed
1069 1070
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
1071
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1072
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1073
		goto unlock_rtnl;
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084

	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
1085 1086 1087 1088

 unlock_rtnl:
	rtnl_unlock();

1089 1090 1091
	return err;
}

1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
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;

1102 1103 1104
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
1105 1106
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
1107
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1108
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1109
		goto unlock_rtnl;
1110

1111 1112 1113 1114 1115
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}

1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 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
	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
1180 1181 1182
 unlock_rtnl:
	rtnl_unlock();

1183 1184 1185 1186 1187 1188 1189 1190 1191
	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
1192 1193
	rtnl_lock();

Johannes Berg's avatar
Johannes Berg committed
1194
	err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1195
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1196
		goto unlock_rtnl;
1197 1198 1199 1200 1201 1202

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

1203 1204 1205 1206
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}
1207 1208 1209 1210 1211
	err = drv->ops->del_beacon(&drv->wiphy, dev);

 out:
	cfg80211_put_dev(drv);
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1212 1213 1214
 unlock_rtnl:
	rtnl_unlock();

1215 1216 1217
	return err;
}

1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246
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;
}

1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
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