nl80211.c 194 KB
Newer Older
1 2 3
/*
 * This is the new netlink-based wireless configuration interface.
 *
4
 * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
5 6 7 8 9
 */

#include <linux/if.h>
#include <linux/module.h>
#include <linux/err.h>
10
#include <linux/slab.h>
11 12 13 14 15 16
#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>
17
#include <linux/etherdevice.h>
18
#include <net/net_namespace.h>
19 20
#include <net/genetlink.h>
#include <net/cfg80211.h>
21
#include <net/sock.h>
22 23
#include "core.h"
#include "nl80211.h"
24
#include "reg.h"
25

26 27 28 29 30 31
static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
				   struct genl_info *info,
				   struct cfg80211_crypto_settings *settings,
				   int cipher_limit);

32 33 34 35 36
static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
			    struct genl_info *info);
static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
			      struct genl_info *info);

37 38 39 40 41 42 43
/* 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,
44
	.netnsok = true,
45 46
	.pre_doit = nl80211_pre_doit,
	.post_doit = nl80211_post_doit,
47 48
};

49
/* internal helper: get rdev and dev */
50
static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
51
				       struct cfg80211_registered_device **rdev,
52 53
				       struct net_device **dev)
{
54
	struct nlattr **attrs = info->attrs;
55 56
	int ifindex;

Johannes Berg's avatar
Johannes Berg committed
57
	if (!attrs[NL80211_ATTR_IFINDEX])
58 59
		return -EINVAL;

Johannes Berg's avatar
Johannes Berg committed
60
	ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
61
	*dev = dev_get_by_index(genl_info_net(info), ifindex);
62 63 64
	if (!*dev)
		return -ENODEV;

65
	*rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
66
	if (IS_ERR(*rdev)) {
67
		dev_put(*dev);
68
		return PTR_ERR(*rdev);
69 70 71 72 73 74
	}

	return 0;
}

/* policy for the attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
75
static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
76 77
	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
78
				      .len = 20-1 },
79
	[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
80
	[NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
Sujith's avatar
Sujith committed
81
	[NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
82 83 84 85
	[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 },
86
	[NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
87 88 89 90

	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
91 92

	[NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
93
	[NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
94

95
	[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
96 97 98 99 100
	[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 },
101
	[NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
102
	[NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
103 104 105 106 107 108 109

	[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 },
110 111 112 113 114
	[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 },
115
	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
116
	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
Johannes Berg's avatar
Johannes Berg committed
117
	[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
118 119 120
	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_MESH_ID_LEN },
	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
121

122 123 124
	[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
	[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },

125 126 127
	[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 },
128 129
	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
					   .len = NL80211_MAX_SUPP_RATES },
130
	[NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
131

132
	[NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
133
	[NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
134

135 136
	[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
					 .len = NL80211_HT_CAPABILITY_LEN },
137 138 139 140

	[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
	[NL80211_ATTR_IE] = { .type = NLA_BINARY,
			      .len = IEEE80211_MAX_DATA_LEN },
141 142
	[NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
	[NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
143 144 145 146 147

	[NL80211_ATTR_SSID] = { .type = NLA_BINARY,
				.len = IEEE80211_MAX_SSID_LEN },
	[NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
Johannes Berg's avatar
Johannes Berg committed
148
	[NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
149
	[NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
150
	[NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
151 152 153
	[NL80211_ATTR_STA_FLAGS2] = {
		.len = sizeof(struct nl80211_sta_flag_update),
	},
154
	[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
155 156
	[NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
	[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
157 158 159
	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
160
	[NL80211_ATTR_PID] = { .type = NLA_U32 },
161
	[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
Samuel Ortiz's avatar
Samuel Ortiz committed
162 163
	[NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
				 .len = WLAN_PMKID_LEN },
164 165
	[NL80211_ATTR_DURATION] = { .type = NLA_U32 },
	[NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
166
	[NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
167 168 169
	[NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
				 .len = IEEE80211_MAX_DATA_LEN },
	[NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
Kalle Valo's avatar
Kalle Valo committed
170
	[NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
171
	[NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
172
	[NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
173
	[NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
174 175
	[NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
176
	[NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
177 178
	[NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
179
	[NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
180
	[NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
181
	[NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
182
	[NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
183
	[NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
184
	[NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
185
	[NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
186
	[NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
187
	[NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
188 189 190 191
	[NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
					 .len = IEEE80211_MAX_DATA_LEN },
	[NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
					 .len = IEEE80211_MAX_DATA_LEN },
192
	[NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
193
	[NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
194
	[NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
195 196 197 198 199
	[NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
	[NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
	[NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
	[NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
	[NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
200 201
};

202
/* policy for the key attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
203
static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
Johannes Berg's avatar
Johannes Berg committed
204
	[NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
205 206 207 208 209
	[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 },
210
	[NL80211_KEY_TYPE] = { .type = NLA_U32 },
211 212 213 214 215 216 217 218
	[NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
};

/* policy for the key default flags */
static const struct nla_policy
nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
	[NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
	[NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
219 220
};

221 222 223 224 225 226 227
/* policy for WoWLAN attributes */
static const struct nla_policy
nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
	[NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
228 229 230 231
	[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
	[NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
232 233
};

234 235 236 237 238 239 240 241
/* policy for GTK rekey offload attributes */
static const struct nla_policy
nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
	[NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
	[NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
	[NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
};

242 243 244 245 246 247
static const struct nla_policy
nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
	[NL80211_ATTR_SCHED_SCAN_MATCH_SSID] = { .type = NLA_BINARY,
						 .len = IEEE80211_MAX_SSID_LEN },
};

248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267
/* 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;
}

268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291
static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
				       struct netlink_callback *cb,
				       struct cfg80211_registered_device **rdev,
				       struct net_device **dev)
{
	int ifidx = cb->args[0];
	int err;

	if (!ifidx)
		ifidx = nl80211_get_ifidx(cb);
	if (ifidx < 0)
		return ifidx;

	cb->args[0] = ifidx;

	rtnl_lock();

	*dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
	if (!*dev) {
		err = -ENODEV;
		goto out_rtnl;
	}

	*rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
292 293
	if (IS_ERR(*rdev)) {
		err = PTR_ERR(*rdev);
294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
		goto out_rtnl;
	}

	return 0;
 out_rtnl:
	rtnl_unlock();
	return err;
}

static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
{
	cfg80211_unlock_rdev(rdev);
	rtnl_unlock();
}

309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338
/* 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;
}

339 340 341 342 343 344 345 346
/* 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);
}

347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370
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;
}

371 372
/* netlink command implementations */

373 374 375
struct key_parse {
	struct key_params p;
	int idx;
376
	int type;
377
	bool def, defmgmt;
378
	bool def_uni, def_multi;
379 380 381 382 383 384 385 386 387 388 389 390 391
};

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];

392 393 394 395 396 397 398
	if (k->def) {
		k->def_uni = true;
		k->def_multi = true;
	}
	if (k->defmgmt)
		k->def_multi = true;

399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414
	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]);

415 416 417 418 419 420
	if (tb[NL80211_KEY_TYPE]) {
		k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
		if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
			return -EINVAL;
	}

421 422 423 424 425 426 427 428 429 430 431 432 433
	if (tb[NL80211_KEY_DEFAULT_TYPES]) {
		struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
		int err = nla_parse_nested(kdt,
					   NUM_NL80211_KEY_DEFAULT_TYPES - 1,
					   tb[NL80211_KEY_DEFAULT_TYPES],
					   nl80211_key_default_policy);
		if (err)
			return err;

		k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
		k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
	}

434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457
	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];

458 459 460 461 462 463 464
	if (k->def) {
		k->def_uni = true;
		k->def_multi = true;
	}
	if (k->defmgmt)
		k->def_multi = true;

465 466 467 468 469 470
	if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
		k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
		if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
			return -EINVAL;
	}

471 472 473 474 475 476 477 478 479 480 481 482 483
	if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
		struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
		int err = nla_parse_nested(
				kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
				info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
				nl80211_key_default_policy);
		if (err)
			return err;

		k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
		k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
	}

484 485 486 487 488 489 490 491 492
	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;
493
	k->type = -1;
494 495 496 497 498 499 500 501 502 503 504 505

	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;

506 507 508 509 510
	if (k->defmgmt) {
		if (k->def_uni || !k->def_multi)
			return -EINVAL;
	}

511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526
	if (k->idx != -1) {
		if (k->defmgmt) {
			if (k->idx < 4 || k->idx > 5)
				return -EINVAL;
		} else if (k->def) {
			if (k->idx < 0 || k->idx > 3)
				return -EINVAL;
		} else {
			if (k->idx < 0 || k->idx > 5)
				return -EINVAL;
		}
	}

	return 0;
}

Johannes Berg's avatar
Johannes Berg committed
527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559
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;
560 561
			if (!parse.def_uni || !parse.def_multi)
				goto error;
Johannes Berg's avatar
Johannes Berg committed
562 563 564
		} else if (parse.defmgmt)
			goto error;
		err = cfg80211_validate_key_settings(rdev, &parse.p,
565
						     parse.idx, false, NULL);
Johannes Berg's avatar
Johannes Berg committed
566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586
		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);

	switch (wdev->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
587
	case NL80211_IFTYPE_P2P_GO:
588
	case NL80211_IFTYPE_MESH_POINT:
Johannes Berg's avatar
Johannes Berg committed
589 590 591 592 593 594
		break;
	case NL80211_IFTYPE_ADHOC:
		if (!wdev->current_bss)
			return -ENOLINK;
		break;
	case NL80211_IFTYPE_STATION:
595
	case NL80211_IFTYPE_P2P_CLIENT:
Johannes Berg's avatar
Johannes Berg committed
596 597 598 599 600 601 602 603 604 605
		if (wdev->sme_state != CFG80211_SME_CONNECTED)
			return -ENOLINK;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687
static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
{
	struct nlattr *nl_modes = nla_nest_start(msg, attr);
	int i;

	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);
	return 0;

nla_put_failure:
	return -ENOBUFS;
}

static int nl80211_put_iface_combinations(struct wiphy *wiphy,
					  struct sk_buff *msg)
{
	struct nlattr *nl_combis;
	int i, j;

	nl_combis = nla_nest_start(msg,
				NL80211_ATTR_INTERFACE_COMBINATIONS);
	if (!nl_combis)
		goto nla_put_failure;

	for (i = 0; i < wiphy->n_iface_combinations; i++) {
		const struct ieee80211_iface_combination *c;
		struct nlattr *nl_combi, *nl_limits;

		c = &wiphy->iface_combinations[i];

		nl_combi = nla_nest_start(msg, i + 1);
		if (!nl_combi)
			goto nla_put_failure;

		nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
		if (!nl_limits)
			goto nla_put_failure;

		for (j = 0; j < c->n_limits; j++) {
			struct nlattr *nl_limit;

			nl_limit = nla_nest_start(msg, j + 1);
			if (!nl_limit)
				goto nla_put_failure;
			NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
				    c->limits[j].max);
			if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
						c->limits[j].types))
				goto nla_put_failure;
			nla_nest_end(msg, nl_limit);
		}

		nla_nest_end(msg, nl_limits);

		if (c->beacon_int_infra_match)
			NLA_PUT_FLAG(msg,
				NL80211_IFACE_COMB_STA_AP_BI_MATCH);
		NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
			    c->num_different_channels);
		NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
			    c->max_interfaces);

		nla_nest_end(msg, nl_combi);
	}

	nla_nest_end(msg, nl_combis);

	return 0;
nla_put_failure:
	return -ENOBUFS;
}

688 689 690 691
static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
692 693 694
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
695
	struct nlattr *nl_cmds;
696 697 698 699
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
700 701
	const struct ieee80211_txrx_stypes *mgmt_stypes =
				dev->wiphy.mgmt_stypes;
702 703 704 705 706

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

707
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
708
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
709

710 711 712
	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
		    cfg80211_rdev_list_generation);

713 714 715 716 717 718 719 720
	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);
721 722
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
		    dev->wiphy.coverage_class);
723 724
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
725 726
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
		   dev->wiphy.max_sched_scan_ssids);
727 728
	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
		    dev->wiphy.max_scan_ie_len);
729 730
	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
		    dev->wiphy.max_sched_scan_ie_len);
731 732
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_MATCH_SETS,
		   dev->wiphy.max_match_sets);
733

734 735
	if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
736 737
	if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
738 739
	if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
740 741
	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
		NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
742 743 744 745
	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)
		NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_SUPPORT);
	if (dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)
		NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP);
746

747 748 749 750
	NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
		sizeof(u32) * dev->wiphy.n_cipher_suites,
		dev->wiphy.cipher_suites);

Samuel Ortiz's avatar
Samuel Ortiz committed
751 752 753
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
		   dev->wiphy.max_num_pmkids);

754 755 756
	if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
		NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);

757 758 759 760 761
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
		    dev->wiphy.available_antennas_tx);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
		    dev->wiphy.available_antennas_rx);

762 763
	if ((dev->wiphy.available_antennas_tx ||
	     dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
764 765 766 767 768 769 770 771 772
		u32 tx_ant = 0, rx_ant = 0;
		int res;
		res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
		if (!res) {
			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
		}
	}

773 774
	if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
				dev->wiphy.interface_modes))
775 776
		goto nla_put_failure;

777 778 779 780 781 782 783 784 785 786 787 788
	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;

789 790 791 792 793 794 795 796 797 798 799 800 801
		/* 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);
		}

802 803 804 805 806 807 808 809 810 811 812
		/* 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];
813 814 815

			if (nl80211_msg_put_channel(msg, chan))
				goto nla_put_failure;
816

817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847
			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);

848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866
	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);
867
	CMD(update_mesh_config, SET_MESH_CONFIG);
868
	CMD(change_bss, SET_BSS);
869 870 871 872
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
Johannes Berg's avatar
Johannes Berg committed
873
	CMD(join_ibss, JOIN_IBSS);
874
	CMD(join_mesh, JOIN_MESH);
Samuel Ortiz's avatar
Samuel Ortiz committed
875 876 877
	CMD(set_pmksa, SET_PMKSA);
	CMD(del_pmksa, DEL_PMKSA);
	CMD(flush_pmksa, FLUSH_PMKSA);
878
	CMD(remain_on_channel, REMAIN_ON_CHANNEL);
879
	CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
880
	CMD(mgmt_tx, FRAME);
881
	CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
882
	if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
883 884 885
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
	}
886
	CMD(set_channel, SET_CHANNEL);
887
	CMD(set_wds_peer, SET_WDS_PEER);
888 889 890 891
	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
		CMD(tdls_mgmt, TDLS_MGMT);
		CMD(tdls_oper, TDLS_OPER);
	}
892 893
	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
		CMD(sched_scan_start, START_SCHED_SCAN);
894 895

#undef CMD
896

897
	if (dev->ops->connect || dev->ops->auth) {
898 899 900 901
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
	}

902
	if (dev->ops->disconnect || dev->ops->deauth) {
903 904 905 906
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
	}

907 908
	nla_nest_end(msg, nl_cmds);

909 910 911 912
	if (dev->ops->remain_on_channel)
		NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
			    dev->wiphy.max_remain_on_channel_duration);

913
	if (dev->ops->mgmt_tx_cancel_wait)
914 915
		NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);

916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940
	if (mgmt_stypes) {
		u16 stypes;
		struct nlattr *nl_ftypes, *nl_ifs;
		enum nl80211_iftype ift;

		nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
		if (!nl_ifs)
			goto nla_put_failure;

		for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
			nl_ftypes = nla_nest_start(msg, ift);
			if (!nl_ftypes)
				goto nla_put_failure;
			i = 0;
			stypes = mgmt_stypes[ift].tx;
			while (stypes) {
				if (stypes & 1)
					NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
						    (i << 4) | IEEE80211_FTYPE_MGMT);
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}

Johannes Berg's avatar
Johannes Berg committed
941 942
		nla_nest_end(msg, nl_ifs);

943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964
		nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
		if (!nl_ifs)
			goto nla_put_failure;

		for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
			nl_ftypes = nla_nest_start(msg, ift);
			if (!nl_ftypes)
				goto nla_put_failure;
			i = 0;
			stypes = mgmt_stypes[ift].rx;
			while (stypes) {
				if (stypes & 1)
					NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
						    (i << 4) | IEEE80211_FTYPE_MGMT);
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}
		nla_nest_end(msg, nl_ifs);
	}

965 966 967 968 969 970 971 972 973 974 975 976 977 978
	if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
		struct nlattr *nl_wowlan;

		nl_wowlan = nla_nest_start(msg,
				NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
		if (!nl_wowlan)
			goto nla_put_failure;

		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
979 980 981 982 983 984 985 986 987 988
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003
		if (dev->wiphy.wowlan.n_patterns) {
			struct nl80211_wowlan_pattern_support pat = {
				.max_patterns = dev->wiphy.wowlan.n_patterns,
				.min_pattern_len =
					dev->wiphy.wowlan.pattern_min_len,
				.max_pattern_len =
					dev->wiphy.wowlan.pattern_max_len,
			};
			NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
				sizeof(pat), &pat);
		}

		nla_nest_end(msg, nl_wowlan);
	}

1004 1005 1006 1007 1008 1009 1010
	if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
				dev->wiphy.software_iftypes))
		goto nla_put_failure;

	if (nl80211_put_iface_combinations(&dev->wiphy, msg))
		goto nla_put_failure;

1011 1012 1013
	return genlmsg_end(msg, hdr);

 nla_put_failure:
1014 1015
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
1016 1017 1018 1019 1020 1021 1022 1023
}

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;

1024
	mutex_lock(&cfg80211_mutex);
1025
	list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1026 1027
		if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
			continue;
1028
		if (++idx <= start)
1029 1030 1031
			continue;
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
1032 1033
				       dev) < 0) {
			idx--;
1034
			break;
1035
		}
1036
	}
1037
	mutex_unlock(&cfg80211_mutex);
1038 1039 1040 1041 1042 1043 1044 1045 1046

	cb->args[0] = idx;

	return skb->len;
}

static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct sk_buff *msg;
1047
	struct cfg80211_registered_device *dev = info->user_ptr[0];
1048

1049
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1050
	if (!msg)
1051
		return -ENOMEM;
1052

1053 1054 1055 1056
	if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
		nlmsg_free(msg);
		return -ENOBUFS;
	}
1057

Johannes Berg's avatar
Johannes Berg committed
1058
	return genlmsg_reply(msg, info);
1059 1060
}

1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
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;
}

1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
{
	/*
	 * You can only set the channel explicitly for AP, mesh
	 * and WDS type interfaces; all others have their channel
	 * managed via their respective "establish a connection"
	 * command (connect, join, ...)
	 *
	 * Monitors are special as they are normally slaved to
	 * whatever else is going on, so they behave as though
	 * you tried setting the wiphy channel itself.
	 */
	return !wdev ||
		wdev->iftype == NL80211_IFTYPE_AP ||
		wdev->iftype == NL80211_IFTYPE_WDS ||
		wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1102 1103
		wdev->iftype == NL80211_IFTYPE_MONITOR ||
		wdev->iftype == NL80211_IFTYPE_P2P_GO;
1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
}

static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
				 struct wireless_dev *wdev,
				 struct genl_info *info)
{
	enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
	u32 freq;
	int result;

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

	if (!nl80211_can_set_dev_channel(wdev))
		return -EOPNOTSUPP;

	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)
			return -EINVAL;
	}

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

	mutex_lock(&rdev->devlist_mtx);
	if (wdev) {
		wdev_lock(wdev);
		result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
		wdev_unlock(wdev);
	} else {
		result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
	}
	mutex_unlock(&rdev->devlist_mtx);

	return result;
}

static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
{
1147 1148
	struct cfg80211_registered_device *rdev = info->user_ptr[0];
	struct net_device *netdev = info->user_ptr[1];
1149

1150
	return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1151 1152
}

1153 1154
static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
{
1155 1156 1157
	struct cfg80211_registered_device *rdev = info->user_ptr[0];
	struct net_device *dev = info->user_ptr[1];
	struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg's avatar
Johannes Berg committed
1158
	const u8 *bssid;
1159 1160 1161 1162

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

1163 1164
	if (netif_running(dev))
		return -EBUSY;
1165

1166 1167
	if (!rdev->ops->set_wds_peer)
		return -EOPNOTSUPP;
1168

1169 1170
	if (wdev->iftype != NL80211_IFTYPE_WDS)
		return -EOPNOTSUPP;
1171 1172

	bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1173
	return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1174 1175 1176
}


1177 1178 1179
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev;
1180 1181
	struct net_device *netdev = NULL;
	struct wireless_dev *wdev;
Bill Jordan's avatar
Bill Jordan committed
1182
	int result = 0, rem_txq_params = 0;
1183
	struct nlattr *nl_txq_params;
1184 1185 1186
	u32 changed;
	u8 retry_short = 0, retry_long = 0;
	u32 frag_threshold = 0, rts_threshold = 0;
Lukáš Turek's avatar