nl80211.c 127 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
	}

	return 0;
}

/* policy for the attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
61
static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
62 63
	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
64
				      .len = 20-1 },
65
	[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
66
	[NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
Sujith's avatar
Sujith committed
67
	[NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
68 69 70 71
	[NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
	[NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
	[NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
72
	[NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
73 74 75 76

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

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

81
	[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
82 83 84 85 86
	[NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
				    .len = WLAN_MAX_KEY_LEN },
	[NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
	[NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
	[NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
87
	[NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
88 89 90 91 92 93 94

	[NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
	[NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
	[NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
				       .len = IEEE80211_MAX_DATA_LEN },
	[NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
				       .len = IEEE80211_MAX_DATA_LEN },
95 96 97 98 99
	[NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
	[NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
	[NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
	[NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
					       .len = NL80211_MAX_SUPP_RATES },
100
	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
101
	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
Johannes Berg's avatar
Johannes Berg committed
102
	[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
103 104 105
	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_MESH_ID_LEN },
	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
106

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

110 111 112
	[NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
	[NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
	[NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
113 114
	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
					   .len = NL80211_MAX_SUPP_RATES },
115

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

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

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

	[NL80211_ATTR_SSID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_SSID_LEN },
	[NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
131
	[NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
132
	[NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
133
	[NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
134 135 136
	[NL80211_ATTR_STA_FLAGS2] = {
		.len = sizeof(struct nl80211_sta_flag_update),
	},
137
	[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
138 139 140
	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
141
	[NL80211_ATTR_PID] = { .type = NLA_U32 },
142
	[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
143 144
	[NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
				 .len = WLAN_PMKID_LEN },
145 146
	[NL80211_ATTR_DURATION] = { .type = NLA_U32 },
	[NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
147
	[NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
148 149
};

150
/* policy for the attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
151
static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
152
	[NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
153 154 155 156 157 158 159
	[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 },
};

160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
/* ifidx get helper */
static int nl80211_get_ifidx(struct netlink_callback *cb)
{
	int res;

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

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

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

180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209
/* 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;
}

210 211 212 213 214 215 216 217
/* 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);
}

218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241
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;
}

242 243
/* netlink command implementations */

244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337
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;
}

338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414
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;
}

415 416 417 418
static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
419 420 421
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
422
	struct nlattr *nl_modes;
423
	struct nlattr *nl_cmds;
424 425 426 427
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
428
	u16 ifmodes = dev->wiphy.interface_modes;
429 430 431 432 433

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

434
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
435
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
436

437 438 439
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
		    cfg80211_rdev_list_generation);

440 441 442 443 444 445 446 447
	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);
448 449
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
		    dev->wiphy.coverage_class);
450

451 452
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
453 454
	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
		    dev->wiphy.max_scan_ie_len);
455

456 457 458 459
	NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
		sizeof(u32) * dev->wiphy.n_cipher_suites,
		dev->wiphy.cipher_suites);

460 461 462
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
		   dev->wiphy.max_num_pmkids);

463 464 465 466 467 468 469 470 471 472 473 474 475 476
	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);

477 478 479 480 481 482 483 484 485 486 487 488
	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;

489 490 491 492 493 494 495 496 497 498 499 500 501
		/* 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);
		}

502 503 504 505 506 507 508 509 510 511 512
		/* 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];
513 514 515

			if (nl80211_msg_put_channel(msg, chan))
				goto nla_put_failure;
516

517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547
			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);

548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568
	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);
569 570 571 572
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
573
	CMD(join_ibss, JOIN_IBSS);
574 575 576
	CMD(set_pmksa, SET_PMKSA);
	CMD(del_pmksa, DEL_PMKSA);
	CMD(flush_pmksa, FLUSH_PMKSA);
577
	CMD(remain_on_channel, REMAIN_ON_CHANNEL);
578
	CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
579
	if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
580 581 582
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
	}
583 584

#undef CMD
585

586
	if (dev->ops->connect || dev->ops->auth) {
587 588 589 590
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
	}

591
	if (dev->ops->disconnect || dev->ops->deauth) {
592 593 594 595
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
	}

596 597
	nla_nest_end(msg, nl_cmds);

598 599 600
	return genlmsg_end(msg, hdr);

 nla_put_failure:
601 602
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
603 604 605 606 607 608 609 610
}

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;

611
	mutex_lock(&cfg80211_mutex);
612
	list_for_each_entry(dev, &cfg80211_rdev_list, list) {
613 614
		if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
			continue;
615
		if (++idx <= start)
616 617 618
			continue;
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
619 620
				       dev) < 0) {
			idx--;
621
			break;
622
		}
623
	}
624
	mutex_unlock(&cfg80211_mutex);
625 626 627 628 629 630 631 632 633 634 635 636 637 638 639

	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);

640
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
641 642 643 644 645 646
	if (!msg)
		goto out_err;

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

647
	cfg80211_unlock_rdev(dev);
648

Johannes Berg's avatar
Johannes Berg committed
649
	return genlmsg_reply(msg, info);
650 651 652 653

 out_free:
	nlmsg_free(msg);
 out_err:
654
	cfg80211_unlock_rdev(dev);
655 656 657
	return -ENOBUFS;
}

658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682
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;
}

683 684 685
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
686 687
	int result = 0, rem_txq_params = 0;
	struct nlattr *nl_txq_params;
688 689 690
	u32 changed;
	u8 retry_short = 0, retry_long = 0;
	u32 frag_threshold = 0, rts_threshold = 0;
691
	u8 coverage_class = 0;
692

693
	rtnl_lock();
694

695 696
	mutex_lock(&cfg80211_mutex);

697
	rdev = __cfg80211_rdev_from_info(info);
698
	if (IS_ERR(rdev)) {
699
		mutex_unlock(&cfg80211_mutex);
700 701 702 703 704 705 706
		result = PTR_ERR(rdev);
		goto unlock;
	}

	mutex_lock(&rdev->mtx);

	if (info->attrs[NL80211_ATTR_WIPHY_NAME])
707 708
		result = cfg80211_dev_rename(
			rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
709 710 711 712 713

	mutex_unlock(&cfg80211_mutex);

	if (result)
		goto bad_res;
714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740

	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;
		}
	}
741

742
	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
Sujith's avatar
Sujith committed
743
		enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
744
		u32 freq;
745

746 747
		result = -EINVAL;

Sujith's avatar
Sujith committed
748 749 750 751 752 753 754
		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)
755 756 757 758
				goto bad_res;
		}

		freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
759

760
		mutex_lock(&rdev->devlist_mtx);
761
		result = rdev_set_freq(rdev, NULL, freq, channel_type);
762
		mutex_unlock(&rdev->devlist_mtx);
763 764 765 766
		if (result)
			goto bad_res;
	}

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
	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;
	}

814 815 816 817 818 819
	if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
		coverage_class = nla_get_u8(
			info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
		changed |= WIPHY_PARAM_COVERAGE_CLASS;
	}

820 821 822
	if (changed) {
		u8 old_retry_short, old_retry_long;
		u32 old_frag_threshold, old_rts_threshold;
823
		u8 old_coverage_class;
824 825 826 827 828 829 830 831 832 833

		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;
834
		old_coverage_class = rdev->wiphy.coverage_class;
835 836 837 838 839 840 841 842 843

		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;
844 845
		if (changed & WIPHY_PARAM_COVERAGE_CLASS)
			rdev->wiphy.coverage_class = coverage_class;
846 847 848 849 850 851 852

		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;
853
			rdev->wiphy.coverage_class = old_coverage_class;
854 855
		}
	}
856

857
 bad_res:
858 859 860
	mutex_unlock(&rdev->mtx);
 unlock:
	rtnl_unlock();
861 862 863 864 865
	return result;
}


static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
866
			      struct cfg80211_registered_device *rdev,
867 868 869 870 871 872 873 874 875
			      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);
876
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
877
	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
878
	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
879 880 881 882 883

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

884 885 886
	return genlmsg_end(msg, hdr);

 nla_put_failure:
887 888
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
889 890 891 892 893 894 895 896
}

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];
897
	struct cfg80211_registered_device *rdev;
898 899
	struct wireless_dev *wdev;

900
	mutex_lock(&cfg80211_mutex);
901 902
	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
		if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
903
			continue;
Johannes Berg's avatar
Johannes Berg committed
904 905
		if (wp_idx < wp_start) {
			wp_idx++;
906
			continue;
Johannes Berg's avatar
Johannes Berg committed
907
		}
908 909
		if_idx = 0;

910 911
		mutex_lock(&rdev->devlist_mtx);
		list_for_each_entry(wdev, &rdev->netdev_list, list) {
Johannes Berg's avatar
Johannes Berg committed
912 913
			if (if_idx < if_start) {
				if_idx++;
914
				continue;
Johannes Berg's avatar
Johannes Berg committed
915
			}
916 917
			if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
					       cb->nlh->nlmsg_seq, NLM_F_MULTI,
918 919
					       rdev, wdev->netdev) < 0) {
				mutex_unlock(&rdev->devlist_mtx);
Johannes Berg's avatar
Johannes Berg committed
920 921 922
				goto out;
			}
			if_idx++;
923
		}
924
		mutex_unlock(&rdev->devlist_mtx);
Johannes Berg's avatar
Johannes Berg committed
925 926

		wp_idx++;
927
	}
Johannes Berg's avatar
Johannes Berg committed
928
 out:
929
	mutex_unlock(&cfg80211_mutex);
930 931 932 933 934 935 936 937 938 939 940 941 942 943

	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;

944
	err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
945 946 947
	if (err)
		return err;

948
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
949 950 951
	if (!msg)
		goto out_err;

952 953
	if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
			       dev, netdev) < 0)
954 955 956
		goto out_free;

	dev_put(netdev);
957
	cfg80211_unlock_rdev(dev);
958

Johannes Berg's avatar
Johannes Berg committed
959
	return genlmsg_reply(msg, info);
960 961 962 963 964

 out_free:
	nlmsg_free(msg);
 out_err:
	dev_put(netdev);
965
	cfg80211_unlock_rdev(dev);
966 967 968
	return -ENOBUFS;
}

969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997
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;
}

998
static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
999 1000
			       struct net_device *netdev, u8 use_4addr,
			       enum nl80211_iftype iftype)
1001
{
1002 1003 1004
	if (!use_4addr) {
		if (netdev && netdev->br_port)
			return -EBUSY;
1005
		return 0;
1006
	}
1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023

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

	return -EOPNOTSUPP;
}

1024 1025
static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
1026
	struct cfg80211_registered_device *rdev;
1027
	struct vif_params params;
1028
	int err;
1029
	enum nl80211_iftype otype, ntype;
1030
	struct net_device *dev;
1031
	u32 _flags, *flags = NULL;
1032
	bool change = false;
1033

1034 1035
	memset(&params, 0, sizeof(params));

Johannes Berg's avatar
Johannes Berg committed
1036 1037
	rtnl_lock();

1038
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1039
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1040 1041
		goto unlock_rtnl;

1042
	otype = ntype = dev->ieee80211_ptr->iftype;
1043

1044
	if (info->attrs[NL80211_ATTR_IFTYPE]) {
1045
		ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1046
		if (otype != ntype)
1047
			change = true;
1048
		if (ntype > NL80211_IFTYPE_MAX) {
1049
			err = -EINVAL;
1050
			goto unlock;
1051
		}
1052 1053
	}

1054
	if (info->attrs[NL80211_ATTR_MESH_ID]) {
1055
		if (ntype != NL80211_IFTYPE_MESH_POINT) {
1056 1057 1058
			err = -EINVAL;
			goto unlock;
		}
1059 1060
		params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
		params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1061
		change = true;
1062 1063
	}

1064 1065 1066
	if (info->attrs[NL80211_ATTR_4ADDR]) {
		params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
		change = true;
1067
		err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1068 1069
		if (err)
			goto unlock;
1070 1071 1072 1073
	} else {
		params.use_4addr = -1;
	}

1074
	if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1075
		if (ntype != NL80211_IFTYPE_MONITOR) {
1076 1077 1078 1079 1080
			err = -EINVAL;
			goto unlock;
		}
		err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
					  &_flags);
1081 1082 1083 1084 1085
		if (err)
			goto unlock;

		flags = &_flags;
		change = true;
1086
	}
Johannes Berg's avatar
Johannes Berg committed
1087

1088
	if (change)
1089
		err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1090 1091
	else
		err = 0;
1092

1093 1094 1095
	if (!err && params.use_4addr != -1)
		dev->ieee80211_ptr->use_4addr = params.use_4addr;

1096
 unlock:
1097
	dev_put(dev);
1098
	cfg80211_unlock_rdev(rdev);
Johannes Berg's avatar
Johannes Berg committed
1099 1100
 unlock_rtnl:
	rtnl_unlock();
1101 1102 1103 1104 1105
	return err;
}

static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
1106
	struct cfg80211_registered_device *rdev;
1107
	struct vif_params params;
1108 1109
	int err;
	enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1110
	u32 flags;
1111

1112 1113
	memset(&params, 0, sizeof(params));

1114 1115 1116 1117 1118 1119 1120 1121 1122
	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
1123 1124
	rtnl_lock();

1125 1126 1127
	rdev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
Johannes Berg's avatar
Johannes Berg committed
1128 1129
		goto unlock_rtnl;
	}
1130

1131 1132
	if (!rdev->ops->add_virtual_intf ||
	    !(rdev->wiphy.interface_modes & (1 << type))) {
1133 1134 1135 1136
		err = -EOPNOTSUPP;
		goto unlock;
	}

1137 1138 1139 1140 1141 1142
	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]);
	}

1143
	if (info->attrs[NL80211_ATTR_4ADDR]) {
1144
		params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1145
		err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1146 1147 1148
		if (err)
			goto unlock;
	}
1149

1150 1151 1152
	err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
				  info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
				  &flags);
1153
	err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1154
		nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1155 1156
		type, err ? NULL : &flags, &params);

1157
 unlock:
1158
	cfg80211_unlock_rdev(rdev);
Johannes Berg's avatar
Johannes Berg committed
1159 1160
 unlock_rtnl:
	rtnl_unlock();
1161 1162 1163 1164 1165
	return err;
}

static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
{
1166
	struct cfg80211_registered_device *rdev;
1167
	int err;
1168 1169
	struct net_device *dev;

Johannes Berg's avatar
Johannes Berg committed
1170 1171
	rtnl_lock();

1172
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1173
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1174
		goto unlock_rtnl;
1175

1176
	if (!rdev->ops->del_virtual_intf) {
1177 1178 1179 1180
		err = -EOPNOTSUPP;
		goto out;
	}

1181
	err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1182 1183

 out:
1184
	cfg80211_unlock_rdev(rdev);
1185
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1186 1187
 unlock_rtnl:
	rtnl_unlock();
1188 1189 1190
	return err;
}

1191 1192 1193
struct get_key_cookie {
	struct sk_buff *msg;
	int error;
1194
	int idx;
1195 1196 1197 1198
};

static void get_key_callback(void *c, struct key_params *params)
{
1199
	struct nlattr *key;
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
	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);

1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233
	key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
	if (!key)
		goto nla_put_failure;

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

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

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

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

	nla_nest_end(cookie->msg, key);

1234 1235 1236 1237 1238 1239 1240
	return;
 nla_put_failure:
	cookie->error = 1;
}

static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
{
1241
	struct cfg80211_registered_device *rdev;
1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254
	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]);

1255
	if (key_idx > 5)
1256 1257 1258 1259 1260
		return -EINVAL;

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

Johannes Berg's avatar
Johannes Berg committed
1261 1262
	rtnl_lock();

1263
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1264
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1265
		goto unlock_rtnl;
1266

1267
	if (!rdev->ops->get_key) {
1268 1269 1270 1271
		err = -EOPNOTSUPP;
		goto out;
	}

1272
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1273 1274 1275 1276 1277 1278 1279 1280 1281 1282
	if (!msg) {
		err = -ENOMEM;
		goto out;
	}

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

	if (IS_ERR(hdr)) {
		err = PTR_ERR(hdr);
Niko Jokinen's avatar
Niko Jokinen committed
1283
		goto free_msg;
1284 1285 1286
	}

	cookie.msg = msg;
1287
	cookie.idx = key_idx;
1288 1289 1290 1291 1292 1293

	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);

1294
	err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1295 1296 1297
				&cookie, get_key_callback);

	if (err)
Niko Jokinen's avatar
Niko Jokinen committed
1298
		goto free_msg;
1299 1300 1301 1302 1303

	if (cookie.error)
		goto nla_put_failure;

	genlmsg_end(msg, hdr);
Johannes Berg's avatar
Johannes Berg committed
1304
	err = genlmsg_reply(msg, info);
1305 1306 1307 1308
	goto out;

 nla_put_failure:
	err = -ENOBUFS;
Niko Jokinen's avatar
Niko Jokinen committed
1309
 free_msg:
1310 1311
	nlmsg_free(msg);
 out:
1312
	cfg80211_unlock_rdev(rdev);
1313
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1314 1315 1316
 unlock_rtnl:
	rtnl_unlock();

1317 1318 1319 1320 1321
	return err;
}

static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
{
1322
	struct cfg80211_registered_device *rdev;
1323
	struct key_parse key;
1324 1325
	int err;
	struct net_device *dev;
1326 1327
	int (*func)(struct wiphy *wiphy, struct net_device *netdev,
		    u8 key_index);
1328

1329 1330 1331
	err = nl80211_parse_key(info, &key);
	if (err)
		return err;
1332

1333
	if (key.idx < 0)
1334 1335
		return -EINVAL;

1336 1337
	/* only support setting default key */
	if (!key.def && !key.defmgmt)
1338 1339
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
1340 1341
	rtnl_lock();

1342
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1343
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1344
		goto unlock_rtnl;
1345

1346
	if (key.def)
1347
		func = rdev->ops->set_default_key;
1348
	else
1349
		func = rdev->ops->set_default_mgmt_key;
1350 1351

	if (!func) {
1352 1353 1354 1355
		err = -EOPNOTSUPP;
		goto out;
	}

1356 1357 1358 1359 1360
	wdev_lock(dev->ieee80211_ptr);
	err = nl80211_key_allowed(dev->ieee80211_ptr);
	if (!err)
		err = func(&rdev->wiphy, dev, key.idx);

Johannes Berg's avatar
Johannes Berg committed
1361
#ifdef CONFIG_CFG80211_WEXT
1362
	if (!err) {
1363
		if (func == rdev->ops->set_default_key)
1364
			dev->ieee80211_ptr->wext.default_key = key.idx;
1365
		else
1366
			dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1367 1368
	}
#endif
1369
	wdev_unlock(dev->ieee80211_ptr);
1370 1371

 out:
1372
	cfg80211_unlock_rdev(rdev);
1373
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1374 1375 1376 1377

 unlock_rtnl:
	rtnl_unlock();

1378 1379 1380 1381 1382
	return err;
}

static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
{
1383
	struct cfg80211_registered_device *rdev;
1384
	int err;
1385
	struct net_device *dev;
1386
	struct key_parse key;
1387 1388
	u8 *mac_addr = NULL;

1389 1390 1391
	err = nl80211_parse_key(info, &key);
	if (err)
		return err;
1392

1393
	if (!key.p.key)
1394 1395 1396 1397 1398
		return -EINVAL;

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

Johannes Berg's avatar
Johannes Berg committed
1399 1400
	rtnl_lock();

1401
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1402
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1403
		goto unlock_rtnl;
1404

1405 1406
	if (!rdev->ops->add_key) {
		err = -EOPNOTSUPP;
1407 1408 1409
		goto out;
	}

1410 1411
	if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
		err = -EINVAL;
1412 1413 1414
		goto out;
	}

1415 1416 1417 1418 1419 1420
	wdev_lock(dev->ieee80211_ptr);
	err = nl80211_key_allowed(dev->ieee80211_ptr);
	if (!err)
		err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
					 mac_addr, &key.p);
	wdev_unlock(dev->ieee80211_ptr);
1421 1422

 out:
1423
	cfg80211_unlock_rdev(rdev);
1424
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1425 1426 1427
 unlock_rtnl:
	rtnl_unlock();

1428 1429 1430 1431 1432
	return err;
}

static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
{
1433
	struct cfg80211_registered_device *rdev;
1434 1435 1436
	int err;
	struct net_device *dev;
	u8 *mac_addr = NULL;
1437
	struct key_parse key;
1438

1439 1440 1441
	err = nl80211_parse_key(info, &key);
	if (err)
		return err;
1442 1443 1444 1445

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

Johannes Berg's avatar
Johannes Berg committed
1446 1447
	rtnl_lock();

1448
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1449
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1450
		goto unlock_rtnl;
1451

1452
	if (!rdev->ops->del_key) {
1453 1454 1455 1456
		err = -EOPNOTSUPP;
		goto out;
	}

1457 1458 1459 1460
	wdev_lock(dev->ieee80211_ptr);
	err = nl80211_key_allowed(dev->ieee80211_ptr);
	if (!err)
		err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1461

Johannes Berg's avatar
Johannes Berg committed
1462
#ifdef CONFIG_CFG80211_WEXT
1463
	if (!err) {
1464
		if (key.idx == dev->ieee80211_ptr->wext.default_key)
1465
			dev->ieee80211_ptr->wext.default_key = -1;
1466
		else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1467 1468 1469
			dev->ieee80211_ptr->wext.default_mgmt_key = -1;
	}
#endif
1470
	wdev_unlock(dev->ieee80211_ptr);
1471

1472
 out:
1473
	cfg80211_unlock_rdev(rdev);
1474
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1475 1476 1477 1478

 unlock_rtnl:
	rtnl_unlock();

1479 1480 1481
	return err;
}

1482 1483 1484 1485
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);
1486
	struct cfg80211_registered_device *rdev;
1487 1488 1489 1490 1491
	int err;
	struct net_device *dev;
	struct beacon_parameters params;
	int haveinfo = 0;

1492 1493 1494
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
1495 1496
	rtnl_lock();

1497
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1498
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1499
		goto unlock_rtnl;
1500

1501 1502 1503 1504 1505
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}

1506 1507 1508 1509 1510 1511 1512 1513 1514 1515
	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;
		}

1516
		call = rdev->ops->add_beacon;
1517 1518
		break;
	case NL80211_CMD_SET_BEACON:
1519
		call = rdev->ops->set_beacon;
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 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564
		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;
	}

1565
	err = call(&rdev->wiphy, dev, &params);
1566 1567

 out:
1568
	cfg80211_unlock_rdev(rdev);
1569
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1570 1571 1572
 unlock_rtnl:
	rtnl_unlock();

1573 1574 1575 1576 1577
	return err;
}

static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
{
1578
	struct cfg80211_registered_device *rdev;
1579 1580 1581
	int err;
	struct net_device *dev;

Johannes Berg's avatar
Johannes Berg committed
1582 1583
	rtnl_lock();

1584
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1585
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1586
		goto unlock_rtnl;
1587

1588
	if (!rdev->ops->del_beacon) {
1589 1590 1591 1592
		err = -EOPNOTSUPP;
		goto out;
	}

1593 1594 1595 1596
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}
1597
	err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1598 1599

 out:
1600
	cfg80211_unlock_rdev(rdev);
1601
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1602 1603 1604
 unlock_rtnl:
	rtnl_unlock();

1605 1606 1607
	return err;
}

1608 1609 1610 1611
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 },
1612
	[NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1613 1614
};

1615 1616
static int parse_station_flags(struct genl_info *info,
			       struct station_parameters *params)
1617 1618
{
	struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1619
	struct nlattr *nla;
1620 1621
	int flag;

1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639
	/*
	 * Try parsing the new attribute first so userspace
	 * can specify both for older kernels.
	 */
	nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
	if (nla) {
		struct nl80211_sta_flag_update *sta_flags;

		sta_flags = nla_data(nla);
		params->sta_flags_mask = sta_flags->mask;
		params->sta_flags_set = sta_flags->set;
		if ((params->sta_flags_mask |
		     params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
			return -EINVAL;
		return 0;
	}

	/* if present, parse the old attribute */
1640

1641
	nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1642 1643 1644 1645 1646 1647 1648
	if (!nla)
		return 0;

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

1649 1650
	params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
	params->sta_flags_mask &= ~1;
1651 1652 1653

	for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
		if (flags[flag])
1654
			params->sta_flags_set |= (1<<flag);
1655 1656 1657 1658

	return 0;
}

1659 1660
static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
				int flags, struct net_device *dev,
1661
				const u8 *mac_addr, struct station_info *sinfo)
1662 1663
{
	void *hdr;
1664 1665
	struct nlattr *sinfoattr, *txrate;
	u16 bitrate;
1666 1667 1668 1669 1670 1671 1672 1673

	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);

1674 1675
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);

1676 1677
	sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
	if (!sinfoattr)
1678
		goto nla_put_failure;
1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696
	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);
1697 1698 1699 1700 1701 1702 1703 1704
	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;

1705 1706
		/* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
		bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1707 1708
		if (bitrate > 0)
			NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1709

1710 1711 1712 1713 1714 1715 1716 1717 1718 1719
		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);
	}
1720 1721 1722 1723 1724 1725
	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);
1726
	nla_nest_end(msg, sinfoattr);
1727 1728 1729 1730

	return genlmsg_end(msg, hdr);

 nla_put_failure:
1731 1732
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
1733 1734
}

1735
static int nl80211_dump_station(struct sk_buff *skb,
Johannes Berg's avatar
Johannes Berg committed
1736
				struct netlink_callback *cb)
1737 1738 1739
{
	struct station_info sinfo;
	struct cfg80211_registered_device *dev;
Johannes Berg's avatar
Johannes Berg committed
1740
	struct net_device *netdev;
1741
	u8 mac_addr[ETH_ALEN];
Johannes Berg's avatar
Johannes Berg committed
1742 1743
	int ifidx = cb->args[0];
	int sta_idx = cb->args[1];
1744 1745
	int err;

1746 1747 1748 1749
	if (!ifidx)
		ifidx = nl80211_get_ifidx(cb);
	if (ifidx < 0)
		return ifidx;
1750

Johannes Berg's avatar
Johannes Berg committed
1751 1752
	rtnl_lock();

1753
	netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
Johannes Berg's avatar
Johannes Berg committed
1754 1755 1756 1757
	if (!netdev) {
		err = -ENODEV;
		goto out_rtnl;
	}
1758

1759
	dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
Johannes Berg's avatar
Johannes Berg committed
1760 1761
	if (IS_ERR(dev)) {
		err = PTR_ERR(dev);
Johannes Berg's avatar
Johannes Berg committed
1762
		goto out_rtnl;
Johannes Berg's avatar
Johannes Berg committed
1763 1764 1765
	}

	if (!dev->ops->dump_station) {
1766
		err = -EOPNOTSUPP;
Johannes Berg's avatar
Johannes Berg committed
1767 1768 1769 1770 1771 1772 1773 1774 1775
		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
1776
			goto out_err;
Johannes Berg's avatar
Johannes Berg committed
1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792

		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:
1793
	cfg80211_unlock_rdev(dev);
Johannes Berg's avatar
Johannes Berg committed
1794 1795
 out_rtnl:
	rtnl_unlock();
Johannes Berg's avatar
Johannes Berg committed
1796 1797

	return err;
1798
}
1799

1800 1801
static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
{
1802
	struct cfg80211_registered_device *rdev;
1803 1804
	int err;
	struct net_device *dev;
1805
	struct station_info sinfo;
1806 1807 1808
	struct sk_buff *msg;
	u8 *mac_addr = NULL;

1809
	memset(&sinfo, 0, sizeof(sinfo));
1810 1811 1812 1813 1814 1815

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

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

Johannes Berg's avatar
Johannes Berg committed
1816 1817
	rtnl_lock();

1818
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1819
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1820
		goto out_rtnl;
1821

1822
	if (!rdev->ops->get_station) {
1823 1824 1825 1826
		err = -EOPNOTSUPP;
		goto out;
	}

1827
	err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1828 1829 1830
	if (err)
		goto out;

1831
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1832 1833 1834 1835
	if (!msg)
		goto out;

	if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1836
				 dev, mac_addr, &sinfo) < 0)
1837 1838
		goto out_free;

Johannes Berg's avatar
Johannes Berg committed
1839
	err = genlmsg_reply(msg, info);
1840 1841 1842 1843 1844
	goto out;

 out_free:
	nlmsg_free(msg);
 out:
1845
	cfg80211_unlock_rdev(rdev);
1846
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1847 1848 1849
 out_rtnl:
	rtnl_unlock();

1850
	return err;
1851 1852 1853
}

/*
1854
 * Get vlan interface making sure it is running and on the right wiphy.
1855
 */
1856
static int get_vlan(struct genl_info *info,
1857 1858 1859
		    struct cfg80211_registered_device *rdev,
		    struct net_device **vlan)
{
1860
	struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1861 1862 1863
	*vlan = NULL;

	if (vlanattr) {
1864 1865
		*vlan = dev_get_by_index(genl_info_net(info),
					 nla_get_u32(vlanattr));
1866 1867 1868 1869 1870 1871
		if (!*vlan)
			return -ENODEV;
		if (!(*vlan)->ieee80211_ptr)
			return -EINVAL;
		if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
			return -EINVAL;
1872 1873
		if (!netif_running(*vlan))
			return -ENETDOWN;
1874 1875 1876 1877 1878 1879
	}
	return 0;
}

static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
{
1880
	struct cfg80211_registered_device *rdev;
1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908
	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]);

1909 1910 1911 1912
	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
		params.ht_capa =
			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);

1913
	if (parse_station_flags(info, &params))
1914 1915
		return -EINVAL;

1916 1917 1918 1919
	if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
		params.plink_action =
		    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);

Johannes Berg's avatar
Johannes Berg committed
1920 1921
	rtnl_lock();

1922
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1923
	if (err)
Johannes Berg's avatar
Johannes Berg committed
1924
		goto out_rtnl;
1925

1926
	err = get_vlan(info, rdev, &params.vlan);
1927
	if (err)
1928
		goto out;
1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969

	/* validate settings */
	err = 0;

	switch (dev->ieee80211_ptr->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
		/* disallow mesh-specific things */
		if (params.plink_action)
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_STATION:
		/* disallow everything but AUTHORIZED flag */
		if (params.plink_action)
			err = -EINVAL;
		if (params.vlan)
			err = -EINVAL;
		if (params.supported_rates)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_MESH_POINT:
		/* disallow things mesh doesn't support */
		if (params.vlan)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.supported_rates)
			err = -EINVAL;
		if (params.sta_flags_mask)
			err = -EINVAL;
		break;
	default:
		err = -EINVAL;
1970 1971
	}

1972 1973 1974
	if (err)
		goto out;

1975
	if (!rdev->ops->change_station) {
1976 1977 1978 1979
		err = -EOPNOTSUPP;
		goto out;
	}

1980
	err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1981 1982 1983 1984

 out:
	if (params.vlan)
		dev_put(params.vlan);
1985
	cfg80211_unlock_rdev(rdev);
1986
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
1987 1988 1989
 out_rtnl:
	rtnl_unlock();

1990 1991 1992 1993 1994
	return err;
}

static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
{
1995
	struct cfg80211_registered_device *rdev;
1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
	int err;
	struct net_device *dev;
	struct station_parameters params;
	u8 *mac_addr = NULL;

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

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

	if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
		return -EINVAL;

	mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
	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]);
	params.listen_interval =
		nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2019

2020 2021 2022 2023 2024
	if (info->attrs[NL80211_ATTR_STA_AID]) {
		params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
		if (!params.aid || params.aid > IEEE80211_MAX_AID)
			return -EINVAL;
	}
2025

2026 2027 2028
	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
		params.ht_capa =
			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2029

2030
	if (parse_station_flags(info, &params))
2031 2032
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
2033 2034
	rtnl_lock();

2035
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2036
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2037
		goto out_rtnl;
2038

2039
	err = get_vlan(info, rdev, &params.vlan);
2040
	if (err)
2041
		goto out;
2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069

	/* validate settings */
	err = 0;

	switch (dev->ieee80211_ptr->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
		/* all ok but must have AID */
		if (!params.aid)
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_MESH_POINT:
		/* disallow things mesh doesn't support */
		if (params.vlan)
			err = -EINVAL;
		if (params.aid)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.supported_rates)
			err = -EINVAL;
		if (params.sta_flags_mask)
			err = -EINVAL;
		break;
	default:
		err = -EINVAL;
2070 2071
	}

2072 2073 2074
	if (err)
		goto out;

2075
	if (!rdev->ops->add_station) {
2076 2077 2078 2079
		err = -EOPNOTSUPP;
		goto out;
	}

2080 2081 2082 2083 2084
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

2085
	err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2086 2087 2088 2089

 out:
	if (params.vlan)
		dev_put(params.vlan);
2090
	cfg80211_unlock_rdev(rdev);
2091
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
2092 2093 2094
 out_rtnl:
	rtnl_unlock();

2095 2096 2097 2098 2099
	return err;
}

static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
{
2100
	struct cfg80211_registered_device *rdev;
2101 2102 2103 2104 2105 2106 2107
	int err;
	struct net_device *dev;
	u8 *mac_addr = NULL;

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

Johannes Berg's avatar
Johannes Berg committed
2108 2109
	rtnl_lock();

2110
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2111
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2112
		goto out_rtnl;
2113

2114
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2115 2116
	    dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
	    dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2117 2118 2119 2120
		err = -EINVAL;
		goto out;
	}

2121
	if (!rdev->ops->del_station) {
2122 2123 2124 2125
		err = -EOPNOTSUPP;
		goto out;
	}

2126
	err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2127 2128

 out:
2129
	cfg80211_unlock_rdev(rdev);
2130
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
2131 2132 2133
 out_rtnl:
	rtnl_unlock();

2134 2135 2136
	return err;
}

2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152
static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
				int flags, struct net_device *dev,
				u8 *dst, u8 *next_hop,
				struct mpath_info *pinfo)
{
	void *hdr;
	struct nlattr *pinfoattr;

	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, dst);
	NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);

2153 2154
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);

2155 2156 2157 2158 2159 2160
	pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
	if (!pinfoattr)
		goto nla_put_failure;
	if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
		NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
			    pinfo->frame_qlen);
2161 2162 2163
	if (pinfo->filled & MPATH_INFO_SN)
		NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
			    pinfo->sn);
2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184
	if (pinfo->filled & MPATH_INFO_METRIC)
		NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
			    pinfo->metric);
	if (pinfo->filled & MPATH_INFO_EXPTIME)
		NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
			    pinfo->exptime);
	if (pinfo->filled & MPATH_INFO_FLAGS)
		NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
			    pinfo->flags);
	if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
		NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
			    pinfo->discovery_timeout);
	if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
		NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
			    pinfo->discovery_retries);

	nla_nest_end(msg, pinfoattr);

	return genlmsg_end(msg, hdr);

 nla_put_failure:
2185 2186
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
2187 2188 2189
}

static int nl80211_dump_mpath(struct sk_buff *skb,
Johannes Berg's avatar
Johannes Berg committed
2190
			      struct netlink_callback *cb)
2191 2192 2193
{
	struct mpath_info pinfo;
	struct cfg80211_registered_device *dev;
Johannes Berg's avatar
Johannes Berg committed
2194
	struct net_device *netdev;
2195 2196
	u8 dst[ETH_ALEN];
	u8 next_hop[ETH_ALEN];
Johannes Berg's avatar
Johannes Berg committed
2197 2198
	int ifidx = cb->args[0];
	int path_idx = cb->args[1];
2199 2200
	int err;

2201 2202 2203 2204
	if (!ifidx)
		ifidx = nl80211_get_ifidx(cb);
	if (ifidx < 0)
		return ifidx;
Johannes Berg's avatar
Johannes Berg committed
2205

Johannes Berg's avatar
Johannes Berg committed
2206 2207
	rtnl_lock();

2208
	netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
Johannes Berg's avatar
Johannes Berg committed
2209 2210 2211 2212
	if (!netdev) {
		err = -ENODEV;
		goto out_rtnl;
	}
Johannes Berg's avatar
Johannes Berg committed
2213

2214
	dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
Johannes Berg's avatar
Johannes Berg committed
2215 2216
	if (IS_ERR(dev)) {
		err = PTR_ERR(dev);
Johannes Berg's avatar
Johannes Berg committed
2217
		goto out_rtnl;
Johannes Berg's avatar
Johannes Berg committed
2218 2219 2220
	}

	if (!dev->ops->dump_mpath) {
2221
		err = -EOPNOTSUPP;
Johannes Berg's avatar
Johannes Berg committed
2222 2223 2224
		goto out_err;
	}

2225 2226
	if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
		err = -EOPNOTSUPP;
2227
		goto out_err;
2228 2229
	}

Johannes Berg's avatar
Johannes Berg committed
2230 2231 2232 2233
	while (1) {
		err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
					   dst, next_hop, &pinfo);
		if (err == -ENOENT)
2234
			break;
Johannes Berg's avatar
Johannes Berg committed
2235
		if (err)
Johannes Berg's avatar
Johannes Berg committed
2236
			goto out_err;
2237

Johannes Berg's avatar
Johannes Berg committed
2238 2239 2240 2241 2242
		if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
				       netdev, dst, next_hop,
				       &pinfo) < 0)
			goto out;
2243

Johannes Berg's avatar
Johannes Berg committed
2244
		path_idx++;
2245 2246 2247
	}


Johannes Berg's avatar
Johannes Berg committed
2248 2249 2250 2251
 out:
	cb->args[1] = path_idx;
	err = skb->len;
 out_err:
2252
	cfg80211_unlock_rdev(dev);
Johannes Berg's avatar
Johannes Berg committed
2253 2254
 out_rtnl:
	rtnl_unlock();
Johannes Berg's avatar
Johannes Berg committed
2255 2256

	return err;
2257 2258 2259 2260
}

static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
{
2261
	struct cfg80211_registered_device *rdev;
2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275
	int err;
	struct net_device *dev;
	struct mpath_info pinfo;
	struct sk_buff *msg;
	u8 *dst = NULL;
	u8 next_hop[ETH_ALEN];

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

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

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

Johannes Berg's avatar
Johannes Berg committed
2276 2277
	rtnl_lock();

2278
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2279
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2280
		goto out_rtnl;
2281

2282
	if (!rdev->ops->get_mpath) {
2283 2284 2285 2286
		err = -EOPNOTSUPP;
		goto out;
	}

2287 2288 2289 2290 2291
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
		err = -EOPNOTSUPP;
		goto out;
	}

2292
	err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2293 2294 2295
	if (err)
		goto out;

2296
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2297 2298 2299 2300 2301 2302 2303
	if (!msg)
		goto out;

	if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
				 dev, dst, next_hop, &pinfo) < 0)
		goto out_free;

Johannes Berg's avatar
Johannes Berg committed
2304
	err = genlmsg_reply(msg, info);
2305 2306 2307 2308 2309
	goto out;

 out_free:
	nlmsg_free(msg);
 out:
2310
	cfg80211_unlock_rdev(rdev);
2311
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
2312 2313 2314
 out_rtnl:
	rtnl_unlock();

2315 2316 2317 2318 2319
	return err;
}

static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
{
2320
	struct cfg80211_registered_device *rdev;
2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334
	int err;
	struct net_device *dev;
	u8 *dst = NULL;
	u8 *next_hop = NULL;

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

	if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
		return -EINVAL;

	dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
	next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);

Johannes Berg's avatar
Johannes Berg committed
2335 2336
	rtnl_lock();

2337
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2338
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2339
		goto out_rtnl;
2340

2341
	if (!rdev->ops->change_mpath) {
2342 2343 2344 2345
		err = -EOPNOTSUPP;
		goto out;
	}

2346 2347 2348 2349 2350
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
		err = -EOPNOTSUPP;
		goto out;
	}

2351 2352 2353 2354 2355
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

2356
	err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2357 2358

 out:
2359
	cfg80211_unlock_rdev(rdev);
2360
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
2361 2362 2363
 out_rtnl:
	rtnl_unlock();

2364 2365 2366 2367
	return err;
}
static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
{
2368
	struct cfg80211_registered_device *rdev;
2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382
	int err;
	struct net_device *dev;
	u8 *dst = NULL;
	u8 *next_hop = NULL;

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

	if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
		return -EINVAL;

	dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
	next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);

Johannes Berg's avatar
Johannes Berg committed
2383 2384
	rtnl_lock();

2385
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2386
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2387
		goto out_rtnl;
2388

2389
	if (!rdev->ops->add_mpath) {
2390 2391 2392 2393
		err = -EOPNOTSUPP;
		goto out;
	}

2394 2395 2396 2397 2398
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
		err = -EOPNOTSUPP;
		goto out;
	}

2399 2400 2401 2402 2403
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

2404
	err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2405 2406

 out:
2407
	cfg80211_unlock_rdev(rdev);
2408
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
2409 2410 2411
 out_rtnl:
	rtnl_unlock();

2412 2413 2414 2415 2416
	return err;
}

static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
{
2417
	struct cfg80211_registered_device *rdev;
2418 2419 2420 2421 2422 2423 2424
	int err;
	struct net_device *dev;
	u8 *dst = NULL;

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

Johannes Berg's avatar
Johannes Berg committed
2425 2426
	rtnl_lock();

2427
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2428
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2429
		goto out_rtnl;
2430

2431
	if (!rdev->ops->del_mpath) {
2432 2433 2434 2435
		err = -EOPNOTSUPP;
		goto out;
	}

2436
	err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2437 2438

 out:
2439
	cfg80211_unlock_rdev(rdev);
2440
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
2441 2442 2443
 out_rtnl:
	rtnl_unlock();

2444 2445 2446
	return err;
}

2447 2448
static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
{
2449
	struct cfg80211_registered_device *rdev;
2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468
	int err;
	struct net_device *dev;
	struct bss_parameters params;

	memset(&params, 0, sizeof(params));
	/* default to not changing parameters */
	params.use_cts_prot = -1;
	params.use_short_preamble = -1;
	params.use_short_slot_time = -1;

	if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
		params.use_cts_prot =
		    nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
	if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
		params.use_short_preamble =
		    nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
	if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
		params.use_short_slot_time =
		    nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2469 2470 2471 2472 2473 2474
	if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
		params.basic_rates =
			nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
		params.basic_rates_len =
			nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
	}
2475

Johannes Berg's avatar
Johannes Berg committed
2476 2477
	rtnl_lock();

2478
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2479
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2480
		goto out_rtnl;
2481

2482
	if (!rdev->ops->change_bss) {
2483 2484 2485 2486
		err = -EOPNOTSUPP;
		goto out;
	}

2487 2488 2489 2490 2491
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
		err = -EOPNOTSUPP;
		goto out;
	}

2492
	err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2493 2494

 out:
2495
	cfg80211_unlock_rdev(rdev);
2496
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
2497 2498 2499
 out_rtnl:
	rtnl_unlock();

2500 2501 2502
	return err;
}

Alexey Dobriyan's avatar
Alexey Dobriyan committed
2503
static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552
	[NL80211_ATTR_REG_RULE_FLAGS]		= { .type = NLA_U32 },
	[NL80211_ATTR_FREQ_RANGE_START]		= { .type = NLA_U32 },
	[NL80211_ATTR_FREQ_RANGE_END]		= { .type = NLA_U32 },
	[NL80211_ATTR_FREQ_RANGE_MAX_BW]	= { .type = NLA_U32 },
	[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]	= { .type = NLA_U32 },
	[NL80211_ATTR_POWER_RULE_MAX_EIRP]	= { .type = NLA_U32 },
};

static int parse_reg_rule(struct nlattr *tb[],
	struct ieee80211_reg_rule *reg_rule)
{
	struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
	struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;

	if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
		return -EINVAL;
	if (!tb[NL80211_ATTR_FREQ_RANGE_START])
		return -EINVAL;
	if (!tb[NL80211_ATTR_FREQ_RANGE_END])
		return -EINVAL;
	if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
		return -EINVAL;
	if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
		return -EINVAL;

	reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);

	freq_range->start_freq_khz =
		nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
	freq_range->end_freq_khz =
		nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
	freq_range->max_bandwidth_khz =
		nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);

	power_rule->max_eirp =
		nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);

	if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
		power_rule->max_antenna_gain =
			nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);

	return 0;
}

static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
{
	int r;
	char *data = NULL;

2553 2554 2555 2556 2557 2558 2559 2560
	/*
	 * You should only get this when cfg80211 hasn't yet initialized
	 * completely when built-in to the kernel right between the time
	 * window between nl80211_init() and regulatory_init(), if that is
	 * even possible.
	 */
	mutex_lock(&cfg80211_mutex);
	if (unlikely(!cfg80211_regdomain)) {
2561 2562
		mutex_unlock(&cfg80211_mutex);
		return -EINPROGRESS;
2563
	}
2564
	mutex_unlock(&cfg80211_mutex);
2565

2566 2567
	if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
		return -EINVAL;
2568 2569 2570

	data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);

2571 2572
	r = regulatory_hint_user(data);

2573 2574 2575
	return r;
}

2576 2577 2578
static int nl80211_get_mesh_params(struct sk_buff *skb,
	struct genl_info *info)
{
2579
	struct cfg80211_registered_device *rdev;
2580 2581 2582 2583 2584 2585 2586
	struct mesh_config cur_params;
	int err;
	struct net_device *dev;
	void *hdr;
	struct nlattr *pinfoattr;
	struct sk_buff *msg;

Johannes Berg's avatar
Johannes Berg committed
2587 2588
	rtnl_lock();

2589
	/* Look up our device */
2590
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2591
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2592
		goto out_rtnl;
2593

2594
	if (!rdev->ops->get_mesh_params) {
2595 2596 2597 2598
		err = -EOPNOTSUPP;
		goto out;
	}

2599
	/* Get the mesh params */
2600
	err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2601 2602 2603 2604
	if (err)
		goto out;

	/* Draw up a netlink message to send back */
2605
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643
	if (!msg) {
		err = -ENOBUFS;
		goto out;
	}
	hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
			     NL80211_CMD_GET_MESH_PARAMS);
	if (!hdr)
		goto nla_put_failure;
	pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
	if (!pinfoattr)
		goto nla_put_failure;
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
	NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
			cur_params.dot11MeshRetryTimeout);
	NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
			cur_params.dot11MeshConfirmTimeout);
	NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
			cur_params.dot11MeshHoldingTimeout);
	NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
			cur_params.dot11MeshMaxPeerLinks);
	NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
			cur_params.dot11MeshMaxRetries);
	NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
			cur_params.dot11MeshTTL);
	NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
			cur_params.auto_open_plinks);
	NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
			cur_params.dot11MeshHWMPmaxPREQretries);
	NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
			cur_params.path_refresh_time);
	NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
			cur_params.min_discovery_timeout);
	NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
			cur_params.dot11MeshHWMPactivePathTimeout);
	NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
			cur_params.dot11MeshHWMPpreqMinInterval);
	NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
			cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2644 2645
	NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
			cur_params.dot11MeshHWMPRootMode);
2646 2647
	nla_nest_end(msg, pinfoattr);
	genlmsg_end(msg, hdr);
Johannes Berg's avatar
Johannes Berg committed
2648
	err = genlmsg_reply(msg, info);
2649 2650
	goto out;

Johannes Berg's avatar
Johannes Berg committed
2651
 nla_put_failure:
2652 2653
	genlmsg_cancel(msg, hdr);
	err = -EMSGSIZE;
Johannes Berg's avatar
Johannes Berg committed
2654
 out:
2655
	/* Cleanup */
2656
	cfg80211_unlock_rdev(rdev);
2657
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
2658 2659 2660
 out_rtnl:
	rtnl_unlock();

2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671
	return err;
}

#define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
do {\
	if (table[attr_num]) {\
		cfg.param = nla_fn(table[attr_num]); \
		mask |= (1 << (attr_num - 1)); \
	} \
} while (0);\

Alexey Dobriyan's avatar
Alexey Dobriyan committed
2672
static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692
	[NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
	[NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
	[NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
	[NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
	[NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
	[NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
	[NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },

	[NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
	[NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
	[NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
	[NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
	[NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
	[NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
};

static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
{
	int err;
	u32 mask;
2693
	struct cfg80211_registered_device *rdev;
2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705
	struct net_device *dev;
	struct mesh_config cfg;
	struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
	struct nlattr *parent_attr;

	parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
	if (!parent_attr)
		return -EINVAL;
	if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
			parent_attr, nl80211_meshconf_params_policy))
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
2706 2707
	rtnl_lock();

2708
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2709
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2710
		goto out_rtnl;
2711

2712
	if (!rdev->ops->set_mesh_params) {
2713 2714 2715 2716
		err = -EOPNOTSUPP;
		goto out;
	}

2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754
	/* This makes sure that there aren't more than 32 mesh config
	 * parameters (otherwise our bitfield scheme would not work.) */
	BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);

	/* Fill in the params struct */
	mask = 0;
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
			mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
			mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
			mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
			mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
			mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
			mask, NL80211_MESHCONF_TTL, nla_get_u8);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
			mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
			mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
			nla_get_u8);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
			mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
			mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
			nla_get_u16);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
			mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
			nla_get_u32);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
			mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
			nla_get_u16);
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
			dot11MeshHWMPnetDiameterTraversalTime,
			mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
			nla_get_u16);
2755 2756 2757 2758
	FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
			dot11MeshHWMPRootMode, mask,
			NL80211_MESHCONF_HWMP_ROOTMODE,
			nla_get_u8);
2759 2760

	/* Apply changes */
2761
	err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2762

2763
 out:
2764
	/* cleanup */
2765
	cfg80211_unlock_rdev(rdev);
2766
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
2767 2768 2769
 out_rtnl:
	rtnl_unlock();

2770 2771 2772 2773 2774
	return err;
}

#undef FILL_IN_MESH_PARAM_IF_SET

2775 2776 2777 2778 2779 2780 2781 2782
static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
{
	struct sk_buff *msg;
	void *hdr = NULL;
	struct nlattr *nl_reg_rules;
	unsigned int i;
	int err = -EINVAL;

2783
	mutex_lock(&cfg80211_mutex);
2784 2785 2786 2787

	if (!cfg80211_regdomain)
		goto out;

2788
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838
	if (!msg) {
		err = -ENOBUFS;
		goto out;
	}

	hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
			     NL80211_CMD_GET_REG);
	if (!hdr)
		goto nla_put_failure;

	NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
		cfg80211_regdomain->alpha2);

	nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
	if (!nl_reg_rules)
		goto nla_put_failure;

	for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
		struct nlattr *nl_reg_rule;
		const struct ieee80211_reg_rule *reg_rule;
		const struct ieee80211_freq_range *freq_range;
		const struct ieee80211_power_rule *power_rule;

		reg_rule = &cfg80211_regdomain->reg_rules[i];
		freq_range = &reg_rule->freq_range;
		power_rule = &reg_rule->power_rule;

		nl_reg_rule = nla_nest_start(msg, i);
		if (!nl_reg_rule)
			goto nla_put_failure;

		NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
			reg_rule->flags);
		NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
			freq_range->start_freq_khz);
		NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
			freq_range->end_freq_khz);
		NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
			freq_range->max_bandwidth_khz);
		NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
			power_rule->max_antenna_gain);
		NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
			power_rule->max_eirp);

		nla_nest_end(msg, nl_reg_rule);
	}

	nla_nest_end(msg, nl_reg_rules);

	genlmsg_end(msg, hdr);
Johannes Berg's avatar
Johannes Berg committed
2839
	err = genlmsg_reply(msg, info);
2840 2841 2842 2843 2844 2845
	goto out;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
	err = -EMSGSIZE;
out:
2846
	mutex_unlock(&cfg80211_mutex);
2847 2848 2849
	return err;
}

2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870
static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
{
	struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
	struct nlattr *nl_reg_rule;
	char *alpha2 = NULL;
	int rem_reg_rules = 0, r = 0;
	u32 num_rules = 0, rule_idx = 0, size_of_regd;
	struct ieee80211_regdomain *rd = NULL;

	if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_REG_RULES])
		return -EINVAL;

	alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);

	nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
			rem_reg_rules) {
		num_rules++;
		if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2871
			return -EINVAL;
2872 2873
	}

2874 2875
	mutex_lock(&cfg80211_mutex);

2876 2877 2878 2879
	if (!reg_is_valid_request(alpha2)) {
		r = -EINVAL;
		goto bad_reg;
	}
2880 2881 2882 2883 2884

	size_of_regd = sizeof(struct ieee80211_regdomain) +
		(num_rules * sizeof(struct ieee80211_reg_rule));

	rd = kzalloc(size_of_regd, GFP_KERNEL);
2885 2886 2887 2888
	if (!rd) {
		r = -ENOMEM;
		goto bad_reg;
	}
2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904

	rd->n_reg_rules = num_rules;
	rd->alpha2[0] = alpha2[0];
	rd->alpha2[1] = alpha2[1];

	nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
			rem_reg_rules) {
		nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
			nla_data(nl_reg_rule), nla_len(nl_reg_rule),
			reg_rule_policy);
		r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
		if (r)
			goto bad_reg;

		rule_idx++;

2905 2906
		if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
			r = -EINVAL;
2907
			goto bad_reg;
2908
		}
2909 2910 2911 2912 2913
	}

	BUG_ON(rule_idx != num_rules);

	r = set_regdom(rd);
2914

2915
	mutex_unlock(&cfg80211_mutex);
2916

2917 2918
	return r;

2919
 bad_reg:
2920
	mutex_unlock(&cfg80211_mutex);
2921
	kfree(rd);
2922
	return r;
2923 2924
}

2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949
static int validate_scan_freqs(struct nlattr *freqs)
{
	struct nlattr *attr1, *attr2;
	int n_channels = 0, tmp1, tmp2;

	nla_for_each_nested(attr1, freqs, tmp1) {
		n_channels++;
		/*
		 * Some hardware has a limited channel list for
		 * scanning, and it is pretty much nonsensical
		 * to scan for a channel twice, so disallow that
		 * and don't require drivers to check that the
		 * channel list they get isn't longer than what
		 * they can scan, as long as they can scan all
		 * the channels they registered at once.
		 */
		nla_for_each_nested(attr2, freqs, tmp2)
			if (attr1 != attr2 &&
			    nla_get_u32(attr1) == nla_get_u32(attr2))
				return 0;
	}

	return n_channels;
}

2950 2951
static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
{
2952
	struct cfg80211_registered_device *rdev;
2953 2954 2955 2956 2957 2958
	struct net_device *dev;
	struct cfg80211_scan_request *request;
	struct cfg80211_ssid *ssid;
	struct ieee80211_channel *channel;
	struct nlattr *attr;
	struct wiphy *wiphy;
2959
	int err, tmp, n_ssids = 0, n_channels, i;
2960
	enum ieee80211_band band;
2961
	size_t ie_len;
2962

2963 2964 2965
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
2966 2967
	rtnl_lock();

2968
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2969
	if (err)
Johannes Berg's avatar
Johannes Berg committed
2970
		goto out_rtnl;
2971

2972
	wiphy = &rdev->wiphy;
2973

2974
	if (!rdev->ops->scan) {
2975 2976 2977 2978
		err = -EOPNOTSUPP;
		goto out;
	}

2979 2980 2981 2982 2983
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

2984
	if (rdev->scan_req) {
2985
		err = -EBUSY;
Johannes Berg's avatar
Johannes Berg committed
2986
		goto out;
2987 2988 2989
	}

	if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2990 2991
		n_channels = validate_scan_freqs(
				info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2992 2993
		if (!n_channels) {
			err = -EINVAL;
Johannes Berg's avatar
Johannes Berg committed
2994
			goto out;
2995 2996
		}
	} else {
2997 2998
		n_channels = 0;

2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009
		for (band = 0; band < IEEE80211_NUM_BANDS; band++)
			if (wiphy->bands[band])
				n_channels += wiphy->bands[band]->n_channels;
	}

	if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
		nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
			n_ssids++;

	if (n_ssids > wiphy->max_scan_ssids) {
		err = -EINVAL;
Johannes Berg's avatar
Johannes Berg committed
3010
		goto out;
3011 3012
	}

3013 3014 3015 3016 3017
	if (info->attrs[NL80211_ATTR_IE])
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
	else
		ie_len = 0;

3018 3019 3020 3021 3022
	if (ie_len > wiphy->max_scan_ie_len) {
		err = -EINVAL;
		goto out;
	}

3023 3024
	request = kzalloc(sizeof(*request)
			+ sizeof(*ssid) * n_ssids
3025 3026
			+ sizeof(channel) * n_channels
			+ ie_len, GFP_KERNEL);
3027 3028
	if (!request) {
		err = -ENOMEM;
Johannes Berg's avatar
Johannes Berg committed
3029
		goto out;
3030 3031 3032
	}

	if (n_ssids)
3033
		request->ssids = (void *)&request->channels[n_channels];
3034
	request->n_ssids = n_ssids;
3035 3036 3037 3038 3039 3040
	if (ie_len) {
		if (request->ssids)
			request->ie = (void *)(request->ssids + n_ssids);
		else
			request->ie = (void *)(request->channels + n_channels);
	}
3041

3042
	i = 0;
3043 3044 3045
	if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
		/* user specified, bail out if channel not found */
		nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3046 3047 3048 3049 3050
			struct ieee80211_channel *chan;

			chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));

			if (!chan) {
3051 3052 3053
				err = -EINVAL;
				goto out_free;
			}
3054 3055 3056 3057 3058 3059

			/* ignore disabled channels */
			if (chan->flags & IEEE80211_CHAN_DISABLED)
				continue;

			request->channels[i] = chan;
3060 3061 3062 3063 3064 3065 3066 3067 3068
			i++;
		}
	} else {
		/* all channels */
		for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
			int j;
			if (!wiphy->bands[band])
				continue;
			for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3069 3070 3071 3072 3073 3074 3075 3076
				struct ieee80211_channel *chan;

				chan = &wiphy->bands[band]->channels[j];

				if (chan->flags & IEEE80211_CHAN_DISABLED)
					continue;

				request->channels[i] = chan;
3077 3078 3079 3080 3081
				i++;
			}
		}
	}

3082 3083 3084 3085 3086 3087 3088
	if (!i) {
		err = -EINVAL;
		goto out_free;
	}

	request->n_channels = i;

3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101
	i = 0;
	if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
		nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
			if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
				err = -EINVAL;
				goto out_free;
			}
			memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
			request->ssids[i].ssid_len = nla_len(attr);
			i++;
		}
	}

3102 3103
	if (info->attrs[NL80211_ATTR_IE]) {
		request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3104 3105
		memcpy((void *)request->ie,
		       nla_data(info->attrs[NL80211_ATTR_IE]),
3106 3107 3108
		       request->ie_len);
	}

3109
	request->dev = dev;
3110
	request->wiphy = &rdev->wiphy;
3111

3112 3113
	rdev->scan_req = request;
	err = rdev->ops->scan(&rdev->wiphy, dev, request);
3114

3115
	if (!err) {
3116
		nl80211_send_scan_start(rdev, dev);
3117 3118
		dev_hold(dev);
	}
3119

3120 3121
 out_free:
	if (err) {
3122
		rdev->scan_req = NULL;
3123 3124 3125
		kfree(request);
	}
 out:
3126
	cfg80211_unlock_rdev(rdev);
3127
	dev_put(dev);
Johannes Berg's avatar
Johannes Berg committed
3128 3129 3130
 out_rtnl:
	rtnl_unlock();

3131 3132 3133 3134 3135
	return err;
}

static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			    struct cfg80211_registered_device *rdev,
Johannes Berg's avatar
Johannes Berg committed
3136 3137
			    struct wireless_dev *wdev,
			    struct cfg80211_internal_bss *intbss)
3138
{
Johannes Berg's avatar
Johannes Berg committed
3139
	struct cfg80211_bss *res = &intbss->pub;
3140 3141
	void *hdr;
	struct nlattr *bss;
Johannes Berg's avatar
Johannes Berg committed
3142 3143 3144
	int i;

	ASSERT_WDEV_LOCK(wdev);
3145 3146 3147 3148 3149 3150

	hdr = nl80211hdr_put(msg, pid, seq, flags,
			     NL80211_CMD_NEW_SCAN_RESULTS);
	if (!hdr)
		return -1;

3151
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
Johannes Berg's avatar
Johannes Berg committed
3152
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3153 3154 3155 3156 3157 3158 3159 3160 3161 3162

	bss = nla_nest_start(msg, NL80211_ATTR_BSS);
	if (!bss)
		goto nla_put_failure;
	if (!is_zero_ether_addr(res->bssid))
		NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
	if (res->information_elements && res->len_information_elements)
		NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
			res->len_information_elements,
			res->information_elements);
3163 3164 3165 3166
	if (res->beacon_ies && res->len_beacon_ies &&
	    res->beacon_ies != res->information_elements)
		NLA_PUT(msg, NL80211_BSS_BEACON_IES,
			res->len_beacon_ies, res->beacon_ies);
3167 3168 3169 3170 3171 3172
	if (res->tsf)
		NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
	if (res->beacon_interval)
		NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
	NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
	NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3173 3174
	NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
		jiffies_to_msecs(jiffies - intbss->ts));
3175

3176
	switch (rdev->wiphy.signal_type) {
3177 3178 3179 3180 3181 3182 3183 3184 3185 3186
	case CFG80211_SIGNAL_TYPE_MBM:
		NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
		break;
	case CFG80211_SIGNAL_TYPE_UNSPEC:
		NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
		break;
	default:
		break;
	}

Johannes Berg's avatar
Johannes Berg committed
3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208
	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
		if (intbss == wdev->current_bss)
			NLA_PUT_U32(msg, NL80211_BSS_STATUS,
				    NL80211_BSS_STATUS_ASSOCIATED);
		else for (i = 0; i < MAX_AUTH_BSSES; i++) {
			if (intbss != wdev->auth_bsses[i])
				continue;
			NLA_PUT_U32(msg, NL80211_BSS_STATUS,
				    NL80211_BSS_STATUS_AUTHENTICATED);
			break;
		}
		break;
	case NL80211_IFTYPE_ADHOC:
		if (intbss == wdev->current_bss)
			NLA_PUT_U32(msg, NL80211_BSS_STATUS,
				    NL80211_BSS_STATUS_IBSS_JOINED);
		break;
	default:
		break;
	}

3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220
	nla_nest_end(msg, bss);

	return genlmsg_end(msg, hdr);

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
}

static int nl80211_dump_scan(struct sk_buff *skb,
			     struct netlink_callback *cb)
{
Johannes Berg's avatar
Johannes Berg committed
3221 3222
	struct cfg80211_registered_device *rdev;
	struct net_device *dev;
3223
	struct cfg80211_internal_bss *scan;
Johannes Berg's avatar
Johannes Berg committed
3224
	struct wireless_dev *wdev;
3225 3226 3227 3228
	int ifidx = cb->args[0];
	int start = cb->args[1], idx = 0;
	int err;

3229 3230 3231 3232 3233
	if (!ifidx)
		ifidx = nl80211_get_ifidx(cb);
	if (ifidx < 0)
		return ifidx;
	cb->args[0] = ifidx;
3234

3235
	dev = dev_get_by_index(sock_net(skb->sk), ifidx);
Johannes Berg's avatar
Johannes Berg committed
3236
	if (!dev)
3237 3238
		return -ENODEV;

3239
	rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
Johannes Berg's avatar
Johannes Berg committed
3240 3241
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
3242 3243 3244
		goto out_put_netdev;
	}

Johannes Berg's avatar
Johannes Berg committed
3245
	wdev = dev->ieee80211_ptr;
3246

Johannes Berg's avatar
Johannes Berg committed
3247 3248 3249 3250 3251
	wdev_lock(wdev);
	spin_lock_bh(&rdev->bss_lock);
	cfg80211_bss_expire(rdev);

	list_for_each_entry(scan, &rdev->bss_list, list) {
3252 3253 3254 3255 3256
		if (++idx <= start)
			continue;
		if (nl80211_send_bss(skb,
				NETLINK_CB(cb->skb).pid,
				cb->nlh->nlmsg_seq, NLM_F_MULTI,
Johannes Berg's avatar
Johannes Berg committed
3257
				rdev, wdev, scan) < 0) {
3258 3259 3260 3261 3262 3263
			idx--;
			goto out;
		}
	}

 out:
Johannes Berg's avatar
Johannes Berg committed
3264 3265
	spin_unlock_bh(&rdev->bss_lock);
	wdev_unlock(wdev);
3266 3267 3268

	cb->args[1] = idx;
	err = skb->len;
Johannes Berg's avatar
Johannes Berg committed
3269
	cfg80211_unlock_rdev(rdev);
3270
 out_put_netdev:
Johannes Berg's avatar
Johannes Berg committed
3271
	dev_put(dev);
3272 3273 3274 3275

	return err;
}

3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375
static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
				int flags, struct net_device *dev,
				struct survey_info *survey)
{
	void *hdr;
	struct nlattr *infoattr;

	/* Survey without a channel doesn't make sense */
	if (!survey->channel)
		return -EINVAL;

	hdr = nl80211hdr_put(msg, pid, seq, flags,
			     NL80211_CMD_NEW_SURVEY_RESULTS);
	if (!hdr)
		return -ENOMEM;

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);

	infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
	if (!infoattr)
		goto nla_put_failure;

	NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
		    survey->channel->center_freq);
	if (survey->filled & SURVEY_INFO_NOISE_DBM)
		NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
			    survey->noise);

	nla_nest_end(msg, infoattr);

	return genlmsg_end(msg, hdr);

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
}

static int nl80211_dump_survey(struct sk_buff *skb,
			struct netlink_callback *cb)
{
	struct survey_info survey;
	struct cfg80211_registered_device *dev;
	struct net_device *netdev;
	int ifidx = cb->args[0];
	int survey_idx = cb->args[1];
	int res;

	if (!ifidx)
		ifidx = nl80211_get_ifidx(cb);
	if (ifidx < 0)
		return ifidx;
	cb->args[0] = ifidx;

	rtnl_lock();

	netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
	if (!netdev) {
		res = -ENODEV;
		goto out_rtnl;
	}

	dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
	if (IS_ERR(dev)) {
		res = PTR_ERR(dev);
		goto out_rtnl;
	}

	if (!dev->ops->dump_survey) {
		res = -EOPNOTSUPP;
		goto out_err;
	}

	while (1) {
		res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
					    &survey);
		if (res == -ENOENT)
			break;
		if (res)
			goto out_err;

		if (nl80211_send_survey(skb,
				NETLINK_CB(cb->skb).pid,
				cb->nlh->nlmsg_seq, NLM_F_MULTI,
				netdev,
				&survey) < 0)
			goto out;
		survey_idx++;
	}

 out:
	cb->args[1] = survey_idx;
	res = skb->len;
 out_err:
	cfg80211_unlock_rdev(dev);
 out_rtnl:
	rtnl_unlock();

	return res;
}

3376 3377
static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
{
3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399
	return auth_type <= NL80211_AUTHTYPE_MAX;
}

static bool nl80211_valid_wpa_versions(u32 wpa_versions)
{
	return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
				  NL80211_WPA_VERSION_2));
}

static bool nl80211_valid_akm_suite(u32 akm)
{
	return akm == WLAN_AKM_SUITE_8021X ||
		akm == WLAN_AKM_SUITE_PSK;
}

static bool nl80211_valid_cipher_suite(u32 cipher)
{
	return cipher == WLAN_CIPHER_SUITE_WEP40 ||
		cipher == WLAN_CIPHER_SUITE_WEP104 ||
		cipher == WLAN_CIPHER_SUITE_TKIP ||
		cipher == WLAN_CIPHER_SUITE_CCMP ||
		cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3400 3401
}

3402

3403 3404
static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
{
3405
	struct cfg80211_registered_device *rdev;
3406
	struct net_device *dev;
3407 3408 3409 3410
	struct ieee80211_channel *chan;
	const u8 *bssid, *ssid, *ie = NULL;
	int err, ssid_len, ie_len = 0;
	enum nl80211_auth_type auth_type;
3411
	struct key_parse key;
3412

3413 3414 3415 3416 3417 3418
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

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

3419 3420 3421
	if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
		return -EINVAL;

3422 3423 3424 3425 3426 3427
	if (!info->attrs[NL80211_ATTR_SSID])
		return -EINVAL;

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

3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446
	err = nl80211_parse_key(info, &key);
	if (err)
		return err;

	if (key.idx >= 0) {
		if (!key.p.key || !key.p.key_len)
			return -EINVAL;
		if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
		     key.p.key_len != WLAN_KEY_LEN_WEP40) &&
		    (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
		     key.p.key_len != WLAN_KEY_LEN_WEP104))
			return -EINVAL;
		if (key.idx > 4)
			return -EINVAL;
	} else {
		key.p.key_len = 0;
		key.p.key = NULL;
	}

3447 3448
	rtnl_lock();

3449
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3450 3451 3452
	if (err)
		goto unlock_rtnl;

3453
	if (!rdev->ops->auth) {
3454 3455 3456 3457
		err = -EOPNOTSUPP;
		goto out;
	}

3458 3459 3460 3461 3462
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

3463 3464 3465 3466 3467
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

3468
	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3469
	chan = ieee80211_get_channel(&rdev->wiphy,
3470 3471 3472 3473
		nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
	if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
		err = -EINVAL;
		goto out;
3474 3475
	}

3476 3477
	ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
	ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3478 3479

	if (info->attrs[NL80211_ATTR_IE]) {
3480 3481
		ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3482 3483
	}

3484 3485
	auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
	if (!nl80211_valid_auth_type(auth_type)) {
3486 3487
		err = -EINVAL;
		goto out;
3488 3489
	}

3490
	err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3491 3492
				 ssid, ssid_len, ie, ie_len,
				 key.p.key, key.p.key_len, key.idx);
3493 3494

out:
3495
	cfg80211_unlock_rdev(rdev);
3496 3497 3498 3499 3500 3501
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

3502
static int nl80211_crypto_settings(struct genl_info *info,
3503 3504
				   struct cfg80211_crypto_settings *settings,
				   int cipher_limit)
3505
{
3506 3507
	memset(settings, 0, sizeof(*settings));

3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520
	settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];

	if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
		void *data;
		int len, i;

		data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
		len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
		settings->n_ciphers_pairwise = len / sizeof(u32);

		if (len % sizeof(u32))
			return -EINVAL;

3521
		if (settings->n_ciphers_pairwise > cipher_limit)
3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566
			return -EINVAL;

		memcpy(settings->ciphers_pairwise, data, len);

		for (i = 0; i < settings->n_ciphers_pairwise; i++)
			if (!nl80211_valid_cipher_suite(
					settings->ciphers_pairwise[i]))
				return -EINVAL;
	}

	if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
		settings->cipher_group =
			nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
		if (!nl80211_valid_cipher_suite(settings->cipher_group))
			return -EINVAL;
	}

	if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
		settings->wpa_versions =
			nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
		if (!nl80211_valid_wpa_versions(settings->wpa_versions))
			return -EINVAL;
	}

	if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
		void *data;
		int len, i;

		data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
		len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
		settings->n_akm_suites = len / sizeof(u32);

		if (len % sizeof(u32))
			return -EINVAL;

		memcpy(settings->akm_suites, data, len);

		for (i = 0; i < settings->n_ciphers_pairwise; i++)
			if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
				return -EINVAL;
	}

	return 0;
}

3567 3568
static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
{
3569
	struct cfg80211_registered_device *rdev;
3570
	struct net_device *dev;
3571
	struct wireless_dev *wdev;
3572
	struct cfg80211_crypto_settings crypto;
3573
	struct ieee80211_channel *chan, *fixedchan;
3574
	const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3575 3576
	int err, ssid_len, ie_len = 0;
	bool use_mfp = false;
3577

3578 3579 3580 3581
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_MAC] ||
3582 3583
	    !info->attrs[NL80211_ATTR_SSID] ||
	    !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3584 3585
		return -EINVAL;

3586 3587
	rtnl_lock();

3588
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3589 3590 3591
	if (err)
		goto unlock_rtnl;

3592
	if (!rdev->ops->assoc) {
3593 3594 3595 3596
		err = -EOPNOTSUPP;
		goto out;
	}

3597 3598 3599 3600 3601
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

3602 3603 3604 3605 3606
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

3607
	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3608

3609 3610 3611 3612 3613
	chan = ieee80211_get_channel(&rdev->wiphy,
		nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
	if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
		err = -EINVAL;
		goto out;
3614 3615
	}

3616
	mutex_lock(&rdev->devlist_mtx);
3617 3618
	wdev = dev->ieee80211_ptr;
	fixedchan = rdev_fixed_channel(rdev, wdev);
3619 3620 3621 3622 3623 3624 3625
	if (fixedchan && chan != fixedchan) {
		err = -EBUSY;
		mutex_unlock(&rdev->devlist_mtx);
		goto out;
	}
	mutex_unlock(&rdev->devlist_mtx);

3626 3627
	ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
	ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3628 3629

	if (info->attrs[NL80211_ATTR_IE]) {
3630 3631
		ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3632 3633
	}

3634
	if (info->attrs[NL80211_ATTR_USE_MFP]) {
3635
		enum nl80211_mfp mfp =
3636
			nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3637
		if (mfp == NL80211_MFP_REQUIRED)
3638
			use_mfp = true;
3639
		else if (mfp != NL80211_MFP_NO) {
3640 3641 3642 3643 3644
			err = -EINVAL;
			goto out;
		}
	}

3645 3646 3647
	if (info->attrs[NL80211_ATTR_PREV_BSSID])
		prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);

3648
	err = nl80211_crypto_settings(info, &crypto, 1);
3649
	if (!err)
3650 3651
		err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
					  ssid, ssid_len, ie, ie_len, use_mfp,
3652
					  &crypto);
3653 3654

out:
3655
	cfg80211_unlock_rdev(rdev);
3656 3657 3658 3659 3660 3661 3662 3663
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
{
3664
	struct cfg80211_registered_device *rdev;
3665
	struct net_device *dev;
3666 3667 3668
	const u8 *ie = NULL, *bssid;
	int err, ie_len = 0;
	u16 reason_code;
3669

3670 3671 3672 3673 3674 3675 3676 3677 3678
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

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

	if (!info->attrs[NL80211_ATTR_REASON_CODE])
		return -EINVAL;

3679 3680
	rtnl_lock();

3681
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3682 3683 3684
	if (err)
		goto unlock_rtnl;

3685
	if (!rdev->ops->deauth) {
3686 3687 3688 3689
		err = -EOPNOTSUPP;
		goto out;
	}

3690 3691 3692 3693 3694
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

3695 3696 3697 3698 3699
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

3700
	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3701

3702 3703
	reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
	if (reason_code == 0) {
3704 3705 3706
		/* Reason Code 0 is reserved */
		err = -EINVAL;
		goto out;
3707
	}
3708 3709

	if (info->attrs[NL80211_ATTR_IE]) {
3710 3711
		ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3712 3713
	}

3714
	err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3715 3716

out:
3717
	cfg80211_unlock_rdev(rdev);
3718 3719 3720 3721 3722 3723 3724 3725
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
{
3726
	struct cfg80211_registered_device *rdev;
3727
	struct net_device *dev;
3728 3729 3730
	const u8 *ie = NULL, *bssid;
	int err, ie_len = 0;
	u16 reason_code;
3731

3732 3733 3734 3735 3736 3737 3738 3739 3740
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

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

	if (!info->attrs[NL80211_ATTR_REASON_CODE])
		return -EINVAL;

3741 3742
	rtnl_lock();

3743
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3744 3745 3746
	if (err)
		goto unlock_rtnl;

3747
	if (!rdev->ops->disassoc) {
3748 3749 3750 3751
		err = -EOPNOTSUPP;
		goto out;
	}

3752 3753 3754 3755 3756
	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

3757 3758 3759 3760 3761
	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

3762
	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3763

3764 3765
	reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
	if (reason_code == 0) {
3766 3767 3768
		/* Reason Code 0 is reserved */
		err = -EINVAL;
		goto out;
3769
	}
3770 3771

	if (info->attrs[NL80211_ATTR_IE]) {
3772 3773
		ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3774 3775
	}

3776
	err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3777 3778

out:
3779
	cfg80211_unlock_rdev(rdev);
3780 3781 3782 3783 3784 3785
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

3786 3787
static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
{
3788
	struct cfg80211_registered_device *rdev;
3789 3790 3791
	struct net_device *dev;
	struct cfg80211_ibss_params ibss;
	struct wiphy *wiphy;
3792
	struct cfg80211_cached_keys *connkeys = NULL;
3793 3794
	int err;

3795 3796
	memset(&ibss, 0, sizeof(ibss));

3797 3798 3799 3800 3801 3802 3803 3804
	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
	    !info->attrs[NL80211_ATTR_SSID] ||
	    !nla_len(info->attrs[NL80211_ATTR_SSID]))
		return -EINVAL;

3805 3806 3807 3808 3809 3810 3811 3812 3813
	ibss.beacon_interval = 100;

	if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
		ibss.beacon_interval =
			nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
		if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
			return -EINVAL;
	}

3814 3815
	rtnl_lock();

3816
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3817 3818 3819
	if (err)
		goto unlock_rtnl;

3820
	if (!rdev->ops->join_ibss) {
3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834
		err = -EOPNOTSUPP;
		goto out;
	}

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

3835
	wiphy = &rdev->wiphy;
3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856

	if (info->attrs[NL80211_ATTR_MAC])
		ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
	ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
	ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);

	if (info->attrs[NL80211_ATTR_IE]) {
		ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
	}

	ibss.channel = ieee80211_get_channel(wiphy,
		nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
	if (!ibss.channel ||
	    ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
	    ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
		err = -EINVAL;
		goto out;
	}

	ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867
	ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];

	if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
		connkeys = nl80211_parse_connkeys(rdev,
					info->attrs[NL80211_ATTR_KEYS]);
		if (IS_ERR(connkeys)) {
			err = PTR_ERR(connkeys);
			connkeys = NULL;
			goto out;
		}
	}
3868

3869
	err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3870 3871

out:
3872
	cfg80211_unlock_rdev(rdev);
3873 3874
	dev_put(dev);
unlock_rtnl:
3875 3876
	if (err)
		kfree(connkeys);
3877 3878 3879 3880 3881 3882
	rtnl_unlock();
	return err;
}

static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
{
3883
	struct cfg80211_registered_device *rdev;
3884 3885 3886 3887 3888
	struct net_device *dev;
	int err;

	rtnl_lock();

3889
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3890 3891 3892
	if (err)
		goto unlock_rtnl;

3893
	if (!rdev->ops->leave_ibss) {
3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907
		err = -EOPNOTSUPP;
		goto out;
	}

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

3908
	err = cfg80211_leave_ibss(rdev, dev, false);
3909 3910

out:
3911
	cfg80211_unlock_rdev(rdev);
3912 3913 3914 3915 3916 3917
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947
#ifdef CONFIG_NL80211_TESTMODE
static struct genl_multicast_group nl80211_testmode_mcgrp = {
	.name = "testmode",
};

static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
	int err;

	if (!info->attrs[NL80211_ATTR_TESTDATA])
		return -EINVAL;

	rtnl_lock();

	rdev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
		goto unlock_rtnl;
	}

	err = -EOPNOTSUPP;
	if (rdev->ops->testmode_cmd) {
		rdev->testmode_info = info;
		err = rdev->ops->testmode_cmd(&rdev->wiphy,
				nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
				nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
		rdev->testmode_info = NULL;
	}

3948
	cfg80211_unlock_rdev(rdev);
3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039

 unlock_rtnl:
	rtnl_unlock();
	return err;
}

static struct sk_buff *
__cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
			      int approxlen, u32 pid, u32 seq, gfp_t gfp)
{
	struct sk_buff *skb;
	void *hdr;
	struct nlattr *data;

	skb = nlmsg_new(approxlen + 100, gfp);
	if (!skb)
		return NULL;

	hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
	if (!hdr) {
		kfree_skb(skb);
		return NULL;
	}

	NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);

	((void **)skb->cb)[0] = rdev;
	((void **)skb->cb)[1] = hdr;
	((void **)skb->cb)[2] = data;

	return skb;

 nla_put_failure:
	kfree_skb(skb);
	return NULL;
}

struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
						  int approxlen)
{
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);

	if (WARN_ON(!rdev->testmode_info))
		return NULL;

	return __cfg80211_testmode_alloc_skb(rdev, approxlen,
				rdev->testmode_info->snd_pid,
				rdev->testmode_info->snd_seq,
				GFP_KERNEL);
}
EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);

int cfg80211_testmode_reply(struct sk_buff *skb)
{
	struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
	void *hdr = ((void **)skb->cb)[1];
	struct nlattr *data = ((void **)skb->cb)[2];

	if (WARN_ON(!rdev->testmode_info)) {
		kfree_skb(skb);
		return -EINVAL;
	}

	nla_nest_end(skb, data);
	genlmsg_end(skb, hdr);
	return genlmsg_reply(skb, rdev->testmode_info);
}
EXPORT_SYMBOL(cfg80211_testmode_reply);

struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
						  int approxlen, gfp_t gfp)
{
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);

	return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
}
EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);

void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
{
	void *hdr = ((void **)skb->cb)[1];
	struct nlattr *data = ((void **)skb->cb)[2];

	nla_nest_end(skb, data);
	genlmsg_end(skb, hdr);
	genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
}
EXPORT_SYMBOL(cfg80211_testmode_event);
#endif

4040 4041
static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
{
4042
	struct cfg80211_registered_device *rdev;
4043 4044 4045
	struct net_device *dev;
	struct cfg80211_connect_params connect;
	struct wiphy *wiphy;
4046
	struct cfg80211_cached_keys *connkeys = NULL;
4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067
	int err;

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

	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_SSID] ||
	    !nla_len(info->attrs[NL80211_ATTR_SSID]))
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
		connect.auth_type =
			nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
		if (!nl80211_valid_auth_type(connect.auth_type))
			return -EINVAL;
	} else
		connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;

	connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];

4068 4069
	err = nl80211_crypto_settings(info, &connect.crypto,
				      NL80211_MAX_NR_CIPHER_SUITES);
4070 4071 4072 4073
	if (err)
		return err;
	rtnl_lock();

4074
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087
	if (err)
		goto unlock_rtnl;

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

4088
	wiphy = &rdev->wiphy;
4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110

	if (info->attrs[NL80211_ATTR_MAC])
		connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
	connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
	connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);

	if (info->attrs[NL80211_ATTR_IE]) {
		connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
		connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
	}

	if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
		connect.channel =
			ieee80211_get_channel(wiphy,
			    nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
		if (!connect.channel ||
		    connect.channel->flags & IEEE80211_CHAN_DISABLED) {
			err = -EINVAL;
			goto out;
		}
	}

4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121
	if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
		connkeys = nl80211_parse_connkeys(rdev,
					info->attrs[NL80211_ATTR_KEYS]);
		if (IS_ERR(connkeys)) {
			err = PTR_ERR(connkeys);
			connkeys = NULL;
			goto out;
		}
	}

	err = cfg80211_connect(rdev, dev, &connect, connkeys);
4122 4123

out:
4124
	cfg80211_unlock_rdev(rdev);
4125 4126
	dev_put(dev);
unlock_rtnl:
4127 4128
	if (err)
		kfree(connkeys);
4129 4130 4131 4132 4133 4134
	rtnl_unlock();
	return err;
}

static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
{
4135
	struct cfg80211_registered_device *rdev;
4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149
	struct net_device *dev;
	int err;
	u16 reason;

	if (!info->attrs[NL80211_ATTR_REASON_CODE])
		reason = WLAN_REASON_DEAUTH_LEAVING;
	else
		reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);

	if (reason == 0)
		return -EINVAL;

	rtnl_lock();

4150
	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163
	if (err)
		goto unlock_rtnl;

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

4164
	err = cfg80211_disconnect(rdev, dev, reason, true);
4165 4166

out:
4167
	cfg80211_unlock_rdev(rdev);
4168 4169 4170 4171 4172 4173
	dev_put(dev);
unlock_rtnl:
	rtnl_unlock();
	return err;
}

4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190
static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
	struct net *net;
	int err;
	u32 pid;

	if (!info->attrs[NL80211_ATTR_PID])
		return -EINVAL;

	pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);

	rtnl_lock();

	rdev = cfg80211_get_dev_from_info(info);
	if (IS_ERR(rdev)) {
		err = PTR_ERR(rdev);
4191
		goto out_rtnl;
4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210
	}

	net = get_net_ns_by_pid(pid);
	if (IS_ERR(net)) {
		err = PTR_ERR(net);
		goto out;
	}

	err = 0;

	/* check if anything to do */
	if (net_eq(wiphy_net(&rdev->wiphy), net))
		goto out_put_net;

	err = cfg80211_switch_netns(rdev, net);
 out_put_net:
	put_net(net);
 out:
	cfg80211_unlock_rdev(rdev);
4211
 out_rtnl:
4212 4213 4214 4215
	rtnl_unlock();
	return err;
}

4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308
static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
	int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
			struct cfg80211_pmksa *pmksa) = NULL;
	int err;
	struct net_device *dev;
	struct cfg80211_pmksa pmksa;

	memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));

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

	if (!info->attrs[NL80211_ATTR_PMKID])
		return -EINVAL;

	rtnl_lock();

	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
	if (err)
		goto out_rtnl;

	pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
	pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

	switch (info->genlhdr->cmd) {
	case NL80211_CMD_SET_PMKSA:
		rdev_ops = rdev->ops->set_pmksa;
		break;
	case NL80211_CMD_DEL_PMKSA:
		rdev_ops = rdev->ops->del_pmksa;
		break;
	default:
		WARN_ON(1);
		break;
	}

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

	err = rdev_ops(&rdev->wiphy, dev, &pmksa);

 out:
	cfg80211_unlock_rdev(rdev);
	dev_put(dev);
 out_rtnl:
	rtnl_unlock();

	return err;
}

static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
	int err;
	struct net_device *dev;

	rtnl_lock();

	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
	if (err)
		goto out_rtnl;

	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!rdev->ops->flush_pmksa) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);

 out:
	cfg80211_unlock_rdev(rdev);
	dev_put(dev);
 out_rtnl:
	rtnl_unlock();

	return err;

}

4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445
static int nl80211_remain_on_channel(struct sk_buff *skb,
				     struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
	struct net_device *dev;
	struct ieee80211_channel *chan;
	struct sk_buff *msg;
	void *hdr;
	u64 cookie;
	enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
	u32 freq, duration;
	int err;

	if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
	    !info->attrs[NL80211_ATTR_DURATION])
		return -EINVAL;

	duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);

	/*
	 * We should be on that channel for at least one jiffie,
	 * and more than 5 seconds seems excessive.
	 */
	if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
		return -EINVAL;

	rtnl_lock();

	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
	if (err)
		goto unlock_rtnl;

	if (!rdev->ops->remain_on_channel) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

	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)
			err = -EINVAL;
			goto out;
	}

	freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
	chan = rdev_freq_to_chan(rdev, freq, channel_type);
	if (chan == NULL) {
		err = -EINVAL;
		goto out;
	}

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg) {
		err = -ENOMEM;
		goto out;
	}

	hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
			     NL80211_CMD_REMAIN_ON_CHANNEL);

	if (IS_ERR(hdr)) {
		err = PTR_ERR(hdr);
		goto free_msg;
	}

	err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
					   channel_type, duration, &cookie);

	if (err)
		goto free_msg;

	NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);

	genlmsg_end(msg, hdr);
	err = genlmsg_reply(msg, info);
	goto out;

 nla_put_failure:
	err = -ENOBUFS;
 free_msg:
	nlmsg_free(msg);
 out:
	cfg80211_unlock_rdev(rdev);
	dev_put(dev);
 unlock_rtnl:
	rtnl_unlock();
	return err;
}

static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
					    struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
	struct net_device *dev;
	u64 cookie;
	int err;

	if (!info->attrs[NL80211_ATTR_COOKIE])
		return -EINVAL;

	rtnl_lock();

	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
	if (err)
		goto unlock_rtnl;

	if (!rdev->ops->cancel_remain_on_channel) {
		err = -EOPNOTSUPP;
		goto out;
	}

	if (!netif_running(dev)) {
		err = -ENETDOWN;
		goto out;
	}

	cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);

	err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);

 out:
	cfg80211_unlock_rdev(rdev);
	dev_put(dev);
 unlock_rtnl:
	rtnl_unlock();
	return err;
}

4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469
static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
			   u8 *rates, u8 rates_len)
{
	u8 i;
	u32 mask = 0;

	for (i = 0; i < rates_len; i++) {
		int rate = (rates[i] & 0x7f) * 5;
		int ridx;
		for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
			struct ieee80211_rate *srate =
				&sband->bitrates[ridx];
			if (rate == srate->bitrate) {
				mask |= 1 << ridx;
				break;
			}
		}
		if (ridx == sband->n_bitrates)
			return 0; /* rate not found */
	}

	return mask;
}

Alexey Dobriyan's avatar
Alexey Dobriyan committed
4470
static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547
	[NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
				    .len = NL80211_MAX_SUPP_RATES },
};

static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
				       struct genl_info *info)
{
	struct nlattr *tb[NL80211_TXRATE_MAX + 1];
	struct cfg80211_registered_device *rdev;
	struct cfg80211_bitrate_mask mask;
	int err, rem, i;
	struct net_device *dev;
	struct nlattr *tx_rates;
	struct ieee80211_supported_band *sband;

	if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
		return -EINVAL;

	rtnl_lock();

	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
	if (err)
		goto unlock_rtnl;

	if (!rdev->ops->set_bitrate_mask) {
		err = -EOPNOTSUPP;
		goto unlock;
	}

	memset(&mask, 0, sizeof(mask));
	/* Default to all rates enabled */
	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
		sband = rdev->wiphy.bands[i];
		mask.control[i].legacy =
			sband ? (1 << sband->n_bitrates) - 1 : 0;
	}

	/*
	 * The nested attribute uses enum nl80211_band as the index. This maps
	 * directly to the enum ieee80211_band values used in cfg80211.
	 */
	nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
	{
		enum ieee80211_band band = nla_type(tx_rates);
		if (band < 0 || band >= IEEE80211_NUM_BANDS) {
			err = -EINVAL;
			goto unlock;
		}
		sband = rdev->wiphy.bands[band];
		if (sband == NULL) {
			err = -EINVAL;
			goto unlock;
		}
		nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
			  nla_len(tx_rates), nl80211_txattr_policy);
		if (tb[NL80211_TXRATE_LEGACY]) {
			mask.control[band].legacy = rateset_to_mask(
				sband,
				nla_data(tb[NL80211_TXRATE_LEGACY]),
				nla_len(tb[NL80211_TXRATE_LEGACY]));
			if (mask.control[band].legacy == 0) {
				err = -EINVAL;
				goto unlock;
			}
		}
	}

	err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);

 unlock:
	dev_put(dev);
	cfg80211_unlock_rdev(rdev);
 unlock_rtnl:
	rtnl_unlock();
	return err;
}

4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584
static struct genl_ops nl80211_ops[] = {
	{
		.cmd = NL80211_CMD_GET_WIPHY,
		.doit = nl80211_get_wiphy,
		.dumpit = nl80211_dump_wiphy,
		.policy = nl80211_policy,
		/* can be retrieved by unprivileged users */
	},
	{
		.cmd = NL80211_CMD_SET_WIPHY,
		.doit = nl80211_set_wiphy,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_GET_INTERFACE,
		.doit = nl80211_get_interface,
		.dumpit = nl80211_dump_interface,
		.policy = nl80211_policy,
		/* can be retrieved by unprivileged users */
	},
	{
		.cmd = NL80211_CMD_SET_INTERFACE,
		.doit = nl80211_set_interface,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_NEW_INTERFACE,
		.doit = nl80211_new_interface,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DEL_INTERFACE,
		.doit = nl80211_del_interface,
		.policy = nl80211_policy,
4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_GET_KEY,
		.doit = nl80211_get_key,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_SET_KEY,
		.doit = nl80211_set_key,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_NEW_KEY,
		.doit = nl80211_new_key,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DEL_KEY,
		.doit = nl80211_del_key,
		.policy = nl80211_policy,
4609 4610
		.flags = GENL_ADMIN_PERM,
	},
4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628
	{
		.cmd = NL80211_CMD_SET_BEACON,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
		.doit = nl80211_addset_beacon,
	},
	{
		.cmd = NL80211_CMD_NEW_BEACON,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
		.doit = nl80211_addset_beacon,
	},
	{
		.cmd = NL80211_CMD_DEL_BEACON,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
		.doit = nl80211_del_beacon,
	},
4629 4630 4631
	{
		.cmd = NL80211_CMD_GET_STATION,
		.doit = nl80211_get_station,
4632
		.dumpit = nl80211_dump_station,
4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650
		.policy = nl80211_policy,
	},
	{
		.cmd = NL80211_CMD_SET_STATION,
		.doit = nl80211_set_station,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_NEW_STATION,
		.doit = nl80211_new_station,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DEL_STATION,
		.doit = nl80211_del_station,
		.policy = nl80211_policy,
4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_GET_MPATH,
		.doit = nl80211_get_mpath,
		.dumpit = nl80211_dump_mpath,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_SET_MPATH,
		.doit = nl80211_set_mpath,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_NEW_MPATH,
		.doit = nl80211_new_mpath,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DEL_MPATH,
		.doit = nl80211_del_mpath,
		.policy = nl80211_policy,
4676 4677 4678 4679 4680 4681
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_SET_BSS,
		.doit = nl80211_set_bss,
		.policy = nl80211_policy,
4682 4683
		.flags = GENL_ADMIN_PERM,
	},
4684 4685 4686 4687 4688 4689
	{
		.cmd = NL80211_CMD_GET_REG,
		.doit = nl80211_get_reg,
		.policy = nl80211_policy,
		/* can be retrieved by unprivileged users */
	},
4690 4691 4692 4693 4694 4695 4696 4697 4698 4699
	{
		.cmd = NL80211_CMD_SET_REG,
		.doit = nl80211_set_reg,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_REQ_SET_REG,
		.doit = nl80211_req_set_reg,
		.policy = nl80211_policy,
4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_GET_MESH_PARAMS,
		.doit = nl80211_get_mesh_params,
		.policy = nl80211_policy,
		/* can be retrieved by unprivileged users */
	},
	{
		.cmd = NL80211_CMD_SET_MESH_PARAMS,
		.doit = nl80211_set_mesh_params,
		.policy = nl80211_policy,
4712 4713
		.flags = GENL_ADMIN_PERM,
	},
4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724
	{
		.cmd = NL80211_CMD_TRIGGER_SCAN,
		.doit = nl80211_trigger_scan,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_GET_SCAN,
		.policy = nl80211_policy,
		.dumpit = nl80211_dump_scan,
	},
4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748
	{
		.cmd = NL80211_CMD_AUTHENTICATE,
		.doit = nl80211_authenticate,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_ASSOCIATE,
		.doit = nl80211_associate,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DEAUTHENTICATE,
		.doit = nl80211_deauthenticate,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DISASSOCIATE,
		.doit = nl80211_disassociate,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760
	{
		.cmd = NL80211_CMD_JOIN_IBSS,
		.doit = nl80211_join_ibss,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_LEAVE_IBSS,
		.doit = nl80211_leave_ibss,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4761 4762 4763 4764 4765 4766 4767 4768
#ifdef CONFIG_NL80211_TESTMODE
	{
		.cmd = NL80211_CMD_TESTMODE,
		.doit = nl80211_testmode_do,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
#endif
4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780
	{
		.cmd = NL80211_CMD_CONNECT,
		.doit = nl80211_connect,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DISCONNECT,
		.doit = nl80211_disconnect,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4781 4782 4783 4784 4785 4786
	{
		.cmd = NL80211_CMD_SET_WIPHY_NETNS,
		.doit = nl80211_wiphy_netns,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4787 4788 4789 4790 4791
	{
		.cmd = NL80211_CMD_GET_SURVEY,
		.policy = nl80211_policy,
		.dumpit = nl80211_dump_survey,
	},
4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809
	{
		.cmd = NL80211_CMD_SET_PMKSA,
		.doit = nl80211_setdel_pmksa,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_DEL_PMKSA,
		.doit = nl80211_setdel_pmksa,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_FLUSH_PMKSA,
		.doit = nl80211_flush_pmksa,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821
	{
		.cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
		.doit = nl80211_remain_on_channel,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
	{
		.cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
		.doit = nl80211_cancel_remain_on_channel,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4822 4823 4824 4825 4826 4827
	{
		.cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
		.doit = nl80211_set_tx_bitrate_mask,
		.policy = nl80211_policy,
		.flags = GENL_ADMIN_PERM,
	},
4828
};
4829

4830 4831 4832
static struct genl_multicast_group nl80211_mlme_mcgrp = {
	.name = "mlme",
};
4833 4834 4835 4836 4837

/* multicast groups */
static struct genl_multicast_group nl80211_config_mcgrp = {
	.name = "config",
};
4838 4839 4840
static struct genl_multicast_group nl80211_scan_mcgrp = {
	.name = "scan",
};
4841 4842 4843
static struct genl_multicast_group nl80211_regulatory_mcgrp = {
	.name = "regulatory",
};
4844 4845 4846 4847 4848 4849 4850

/* notification functions */

void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
{
	struct sk_buff *msg;

4851
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4852 4853 4854 4855 4856 4857 4858 4859
	if (!msg)
		return;

	if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
		nlmsg_free(msg);
		return;
	}

4860 4861
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_config_mcgrp.id, GFP_KERNEL);
4862 4863
}

4864 4865 4866 4867 4868 4869 4870
static int nl80211_add_scan_req(struct sk_buff *msg,
				struct cfg80211_registered_device *rdev)
{
	struct cfg80211_scan_request *req = rdev->scan_req;
	struct nlattr *nest;
	int i;

Johannes Berg's avatar
Johannes Berg committed
4871 4872
	ASSERT_RDEV_LOCK(rdev);

4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897
	if (WARN_ON(!req))
		return 0;

	nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
	if (!nest)
		goto nla_put_failure;
	for (i = 0; i < req->n_ssids; i++)
		NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
	nla_nest_end(msg, nest);

	nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
	if (!nest)
		goto nla_put_failure;
	for (i = 0; i < req->n_channels; i++)
		NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
	nla_nest_end(msg, nest);

	if (req->ie)
		NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);

	return 0;
 nla_put_failure:
	return -ENOBUFS;
}

4898 4899 4900 4901 4902
static int nl80211_send_scan_msg(struct sk_buff *msg,
				 struct cfg80211_registered_device *rdev,
				 struct net_device *netdev,
				 u32 pid, u32 seq, int flags,
				 u32 cmd)
4903 4904 4905 4906 4907 4908 4909
{
	void *hdr;

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

4910
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4911 4912
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);

4913 4914
	/* ignore errors and send incomplete event anyway */
	nl80211_add_scan_req(msg, rdev);
4915 4916 4917 4918 4919 4920 4921 4922

	return genlmsg_end(msg, hdr);

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
}

4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937
void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
			     struct net_device *netdev)
{
	struct sk_buff *msg;

	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!msg)
		return;

	if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
				  NL80211_CMD_TRIGGER_SCAN) < 0) {
		nlmsg_free(msg);
		return;
	}

4938 4939
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_scan_mcgrp.id, GFP_KERNEL);
4940 4941
}

4942 4943 4944 4945 4946
void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
			    struct net_device *netdev)
{
	struct sk_buff *msg;

4947
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4948 4949 4950
	if (!msg)
		return;

4951 4952
	if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
				  NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4953 4954 4955 4956
		nlmsg_free(msg);
		return;
	}

4957 4958
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_scan_mcgrp.id, GFP_KERNEL);
4959 4960 4961 4962 4963 4964 4965
}

void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
			       struct net_device *netdev)
{
	struct sk_buff *msg;

4966
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4967 4968 4969
	if (!msg)
		return;

4970 4971
	if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
				  NL80211_CMD_SCAN_ABORTED) < 0) {
4972 4973 4974 4975
		nlmsg_free(msg);
		return;
	}

4976 4977
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_scan_mcgrp.id, GFP_KERNEL);
4978 4979
}

4980 4981 4982 4983 4984 4985 4986 4987 4988
/*
 * This can happen on global regulatory changes or device specific settings
 * based on custom world regulatory domains.
 */
void nl80211_send_reg_change_event(struct regulatory_request *request)
{
	struct sk_buff *msg;
	void *hdr;

4989
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	/* Userspace can always count this one always being set */
	NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);

	if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
		NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
			   NL80211_REGDOM_TYPE_WORLD);
	else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
		NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
			   NL80211_REGDOM_TYPE_CUSTOM_WORLD);
	else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
		 request->intersect)
		NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
			   NL80211_REGDOM_TYPE_INTERSECTION);
	else {
		NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
			   NL80211_REGDOM_TYPE_COUNTRY);
		NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
	}

	if (wiphy_idx_valid(request->wiphy_idx))
		NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

5026
	rcu_read_lock();
5027
	genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5028 5029
				GFP_ATOMIC);
	rcu_read_unlock();
5030 5031 5032 5033 5034 5035 5036 5037

	return;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);
}

5038 5039 5040
static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
				    struct net_device *netdev,
				    const u8 *buf, size_t len,
5041
				    enum nl80211_commands cmd, gfp_t gfp)
5042 5043 5044 5045
{
	struct sk_buff *msg;
	void *hdr;

5046
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

5065 5066
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
5067 5068 5069 5070 5071 5072 5073 5074
	return;

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);
}

void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5075 5076
			  struct net_device *netdev, const u8 *buf,
			  size_t len, gfp_t gfp)
5077 5078
{
	nl80211_send_mlme_event(rdev, netdev, buf, len,
5079
				NL80211_CMD_AUTHENTICATE, gfp);
5080 5081 5082 5083
}

void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
			   struct net_device *netdev, const u8 *buf,
5084
			   size_t len, gfp_t gfp)
5085
{
5086 5087
	nl80211_send_mlme_event(rdev, netdev, buf, len,
				NL80211_CMD_ASSOCIATE, gfp);
5088 5089
}

5090
void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5091 5092
			 struct net_device *netdev, const u8 *buf,
			 size_t len, gfp_t gfp)
5093 5094
{
	nl80211_send_mlme_event(rdev, netdev, buf, len,
5095
				NL80211_CMD_DEAUTHENTICATE, gfp);
5096 5097
}

5098 5099
void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
			   struct net_device *netdev, const u8 *buf,
5100
			   size_t len, gfp_t gfp)
5101 5102
{
	nl80211_send_mlme_event(rdev, netdev, buf, len,
5103
				NL80211_CMD_DISASSOCIATE, gfp);
5104 5105
}

5106 5107
static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
				      struct net_device *netdev, int cmd,
5108
				      const u8 *addr, gfp_t gfp)
5109 5110 5111 5112
{
	struct sk_buff *msg;
	void *hdr;

5113
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

5133 5134
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
5135 5136 5137 5138 5139 5140 5141 5142
	return;

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);
}

void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5143 5144
			       struct net_device *netdev, const u8 *addr,
			       gfp_t gfp)
5145 5146
{
	nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5147
				  addr, gfp);
5148 5149 5150
}

void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5151 5152
				struct net_device *netdev, const u8 *addr,
				gfp_t gfp)
5153
{
5154 5155
	nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
				  addr, gfp);
5156 5157
}

5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191
void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
				 struct net_device *netdev, const u8 *bssid,
				 const u8 *req_ie, size_t req_ie_len,
				 const u8 *resp_ie, size_t resp_ie_len,
				 u16 status, gfp_t gfp)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	if (bssid)
		NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
	NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
	if (req_ie)
		NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
	if (resp_ie)
		NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

5192 5193
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232
	return;

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);

}

void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
			 struct net_device *netdev, const u8 *bssid,
			 const u8 *req_ie, size_t req_ie_len,
			 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
	if (req_ie)
		NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
	if (resp_ie)
		NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

5233 5234
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
5235 5236 5237 5238 5239 5240 5241 5242 5243 5244
	return;

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);

}

void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
			       struct net_device *netdev, u16 reason,
Johannes Berg's avatar
Johannes Berg committed
5245
			       const u8 *ie, size_t ie_len, bool from_ap)
5246 5247 5248 5249
{
	struct sk_buff *msg;
	void *hdr;

Johannes Berg's avatar
Johannes Berg committed
5250
	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	if (from_ap && reason)
		NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
	if (from_ap)
		NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
	if (ie)
		NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

5274 5275
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, GFP_KERNEL);
5276 5277 5278 5279 5280 5281 5282 5283
	return;

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);

}

5284 5285 5286 5287 5288 5289 5290
void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
			     struct net_device *netdev, const u8 *bssid,
			     gfp_t gfp)
{
	struct sk_buff *msg;
	void *hdr;

5291
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

5310 5311
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
5312 5313 5314 5315 5316 5317 5318
	return;

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);
}

5319 5320 5321
void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
				 struct net_device *netdev, const u8 *addr,
				 enum nl80211_key_type key_type, int key_id,
5322
				 const u8 *tsc, gfp_t gfp)
5323 5324 5325 5326
{
	struct sk_buff *msg;
	void *hdr;

5327
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339 5340 5341 5342 5343 5344 5345 5346 5347 5348 5349 5350
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	if (addr)
		NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
	NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
	NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
	if (tsc)
		NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

5351 5352
	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
5353 5354 5355 5356 5357 5358 5359
	return;

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);
}

5360 5361 5362 5363 5364 5365 5366 5367
void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
				    struct ieee80211_channel *channel_before,
				    struct ieee80211_channel *channel_after)
{
	struct sk_buff *msg;
	void *hdr;
	struct nlattr *nl_freq;

5368
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380 5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402 5403 5404
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	/*
	 * Since we are applying the beacon hint to a wiphy we know its
	 * wiphy_idx is valid
	 */
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));

	/* Before */
	nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
	if (!nl_freq)
		goto nla_put_failure;
	if (nl80211_msg_put_channel(msg, channel_before))
		goto nla_put_failure;
	nla_nest_end(msg, nl_freq);

	/* After */
	nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
	if (!nl_freq)
		goto nla_put_failure;
	if (nl80211_msg_put_channel(msg, channel_after))
		goto nla_put_failure;
	nla_nest_end(msg, nl_freq);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

5405 5406 5407 5408
	rcu_read_lock();
	genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
				GFP_ATOMIC);
	rcu_read_unlock();
5409 5410 5411 5412 5413 5414 5415 5416

	return;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);
}

5417 5418 5419 5420 5421 5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457 5458 5459 5460 5461 5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474 5475 5476 5477 5478 5479 5480
static void nl80211_send_remain_on_chan_event(
	int cmd, struct cfg80211_registered_device *rdev,
	struct net_device *netdev, u64 cookie,
	struct ieee80211_channel *chan,
	enum nl80211_channel_type channel_type,
	unsigned int duration, gfp_t gfp)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
	if (!msg)
		return;

	hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
	if (!hdr) {
		nlmsg_free(msg);
		return;
	}

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
	NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);

	if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
		NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);

	if (genlmsg_end(msg, hdr) < 0) {
		nlmsg_free(msg);
		return;
	}

	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
	return;

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);
}

void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
				    struct net_device *netdev, u64 cookie,
				    struct ieee80211_channel *chan,
				    enum nl80211_channel_type channel_type,
				    unsigned int duration, gfp_t gfp)
{
	nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
					  rdev, netdev, cookie, chan,
					  channel_type, duration, gfp);
}

void nl80211_send_remain_on_channel_cancel(
	struct cfg80211_registered_device *rdev, struct net_device *netdev,
	u64 cookie, struct ieee80211_channel *chan,
	enum nl80211_channel_type channel_type, gfp_t gfp)
{
	nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
					  rdev, netdev, cookie, chan,
					  channel_type, 0, gfp);
}

5481 5482 5483 5484 5485 5486 5487 5488 5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499
void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
			    struct net_device *dev, const u8 *mac_addr,
			    struct station_info *sinfo, gfp_t gfp)
{
	struct sk_buff *msg;

	msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
	if (!msg)
		return;

	if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
		nlmsg_free(msg);
		return;
	}

	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
				nl80211_mlme_mcgrp.id, gfp);
}

5500 5501 5502 5503
/* initialisation/exit functions */

int nl80211_init(void)
{
5504
	int err;
5505

5506 5507
	err = genl_register_family_with_ops(&nl80211_fam,
		nl80211_ops, ARRAY_SIZE(nl80211_ops));
5508 5509 5510 5511 5512 5513 5514
	if (err)
		return err;

	err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
	if (err)
		goto err_out;

5515 5516 5517 5518
	err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
	if (err)
		goto err_out;

5519 5520 5521 5522
	err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
	if (err)
		goto err_out;

5523 5524 5525 5526
	err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
	if (err)
		goto err_out;

5527 5528 5529 5530 5531 5532
#ifdef CONFIG_NL80211_TESTMODE
	err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
	if (err)
		goto err_out;
#endif

5533 5534 5535 5536 5537 5538 5539 5540 5541 5542
	return 0;
 err_out:
	genl_unregister_family(&nl80211_fam);
	return err;
}

void nl80211_exit(void)
{
	genl_unregister_family(&nl80211_fam);
}