nl80211.c 241 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
#include "rdev-ops.h"
26

27
28
29
30
31
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
50
51
/* returns ERR_PTR values */
static struct wireless_dev *
__cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
52
{
53
54
55
56
57
58
59
	struct cfg80211_registered_device *rdev;
	struct wireless_dev *result = NULL;
	bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
	bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
	u64 wdev_id;
	int wiphy_idx = -1;
	int ifidx = -1;
60

61
	assert_cfg80211_lock();
62

63
64
	if (!have_ifidx && !have_wdev_id)
		return ERR_PTR(-EINVAL);
65

66
67
68
69
70
	if (have_ifidx)
		ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
	if (have_wdev_id) {
		wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
		wiphy_idx = wdev_id >> 32;
71
72
	}

73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
		struct wireless_dev *wdev;

		if (wiphy_net(&rdev->wiphy) != netns)
			continue;

		if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
			continue;

		mutex_lock(&rdev->devlist_mtx);
		list_for_each_entry(wdev, &rdev->wdev_list, list) {
			if (have_ifidx && wdev->netdev &&
			    wdev->netdev->ifindex == ifidx) {
				result = wdev;
				break;
			}
			if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
				result = wdev;
				break;
			}
		}
		mutex_unlock(&rdev->devlist_mtx);

		if (result)
			break;
	}

	if (result)
		return result;
	return ERR_PTR(-ENODEV);
103
104
}

105
static struct cfg80211_registered_device *
106
__cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
107
{
108
109
	struct cfg80211_registered_device *rdev = NULL, *tmp;
	struct net_device *netdev;
110
111
112

	assert_cfg80211_lock();

113
	if (!attrs[NL80211_ATTR_WIPHY] &&
114
115
	    !attrs[NL80211_ATTR_IFINDEX] &&
	    !attrs[NL80211_ATTR_WDEV])
116
117
		return ERR_PTR(-EINVAL);

118
	if (attrs[NL80211_ATTR_WIPHY])
119
		rdev = cfg80211_rdev_by_wiphy_idx(
120
				nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
121

122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
	if (attrs[NL80211_ATTR_WDEV]) {
		u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
		struct wireless_dev *wdev;
		bool found = false;

		tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
		if (tmp) {
			/* make sure wdev exists */
			mutex_lock(&tmp->devlist_mtx);
			list_for_each_entry(wdev, &tmp->wdev_list, list) {
				if (wdev->identifier != (u32)wdev_id)
					continue;
				found = true;
				break;
			}
			mutex_unlock(&tmp->devlist_mtx);

			if (!found)
				tmp = NULL;

			if (rdev && tmp != rdev)
				return ERR_PTR(-EINVAL);
			rdev = tmp;
		}
	}

148
149
	if (attrs[NL80211_ATTR_IFINDEX]) {
		int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
Johannes Berg's avatar
Johannes Berg committed
150
		netdev = dev_get_by_index(netns, ifindex);
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
		if (netdev) {
			if (netdev->ieee80211_ptr)
				tmp = wiphy_to_dev(
						netdev->ieee80211_ptr->wiphy);
			else
				tmp = NULL;

			dev_put(netdev);

			/* not wireless device -- return error */
			if (!tmp)
				return ERR_PTR(-EINVAL);

			/* mismatch -- return error */
			if (rdev && tmp != rdev)
				return ERR_PTR(-EINVAL);

			rdev = tmp;
169
170
171
		}
	}

Johannes Berg's avatar
Johannes Berg committed
172
173
	if (!rdev)
		return ERR_PTR(-ENODEV);
174

Johannes Berg's avatar
Johannes Berg committed
175
176
177
178
	if (netns != wiphy_net(&rdev->wiphy))
		return ERR_PTR(-ENODEV);

	return rdev;
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
}

/*
 * This function returns a pointer to the driver
 * that the genl_info item that is passed refers to.
 * If successful, it returns non-NULL and also locks
 * the driver's mutex!
 *
 * This means that you need to call cfg80211_unlock_rdev()
 * before being allowed to acquire &cfg80211_mutex!
 *
 * This is necessary because we need to lock the global
 * mutex to get an item off the list safely, and then
 * we lock the rdev mutex so it doesn't go away under us.
 *
 * We don't want to keep cfg80211_mutex locked
 * for all the time in order to allow requests on
 * other interfaces to go through at the same time.
 *
 * The result of this can be a PTR_ERR and hence must
 * be checked with IS_ERR() for errors.
 */
static struct cfg80211_registered_device *
Johannes Berg's avatar
Johannes Berg committed
202
cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
203
204
205
206
{
	struct cfg80211_registered_device *rdev;

	mutex_lock(&cfg80211_mutex);
207
	rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
208
209
210
211
212
213
214
215
216
217
218
219

	/* if it is not an error we grab the lock on
	 * it to assure it won't be going away while
	 * we operate on it */
	if (!IS_ERR(rdev))
		mutex_lock(&rdev->mtx);

	mutex_unlock(&cfg80211_mutex);

	return rdev;
}

220
/* policy for the attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
221
static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
222
223
	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
224
				      .len = 20-1 },
225
	[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
226

227
	[NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
Sujith's avatar
Sujith committed
228
	[NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
229
230
231
232
	[NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
	[NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
	[NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },

233
234
235
236
	[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 },
237
	[NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
238
239
240
241

	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
242

243
244
	[NL80211_ATTR_MAC] = { .len = ETH_ALEN },
	[NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
245

246
	[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
247
248
249
250
251
	[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 },
252
	[NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
253
	[NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
254
255
256
257
258
259
260

	[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 },
261
262
263
264
265
	[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 },
266
	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
267
	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
Johannes Berg's avatar
Johannes Berg committed
268
	[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
269
	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
270
				   .len = IEEE80211_MAX_MESH_ID_LEN },
271
	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
272

273
274
275
	[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
	[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },

276
277
278
	[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 },
279
280
	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
					   .len = NL80211_MAX_SUPP_RATES },
281
	[NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
282

283
	[NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
284
	[NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
285

286
	[NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
287
288
289
290

	[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
	[NL80211_ATTR_IE] = { .type = NLA_BINARY,
			      .len = IEEE80211_MAX_DATA_LEN },
291
292
	[NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
	[NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
293
294
295
296
297

	[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
298
	[NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
299
	[NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
300
	[NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
301
302
303
	[NL80211_ATTR_STA_FLAGS2] = {
		.len = sizeof(struct nl80211_sta_flag_update),
	},
304
	[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
305
306
	[NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
	[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
307
308
309
	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
310
	[NL80211_ATTR_PID] = { .type = NLA_U32 },
311
	[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
Samuel Ortiz's avatar
Samuel Ortiz committed
312
313
	[NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
				 .len = WLAN_PMKID_LEN },
314
315
	[NL80211_ATTR_DURATION] = { .type = NLA_U32 },
	[NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
316
	[NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
317
318
319
	[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
320
	[NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
321
	[NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
322
	[NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
323
	[NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
324
325
	[NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
326
	[NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
327
328
	[NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
329
	[NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
330
	[NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
331
	[NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
332
	[NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
333
	[NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
334
	[NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
335
	[NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
336
	[NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
337
	[NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
338
339
340
341
	[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 },
342
	[NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
343
	[NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
344
	[NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
345
346
347
348
349
	[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 },
350
	[NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
351
352
	[NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
				      .len = IEEE80211_MAX_DATA_LEN },
353
	[NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
354
355
356
357
	[NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
	[NL80211_ATTR_HT_CAPABILITY_MASK] = {
		.len = NL80211_HT_CAPABILITY_LEN
	},
358
	[NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
359
	[NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
360
	[NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
361
	[NL80211_ATTR_WDEV] = { .type = NLA_U64 },
362
	[NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
363
	[NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
364
	[NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
365
	[NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
366
367
	[NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
	[NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
368
369
};

370
/* policy for the key attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
371
static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
Johannes Berg's avatar
Johannes Berg committed
372
	[NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
373
374
	[NL80211_KEY_IDX] = { .type = NLA_U8 },
	[NL80211_KEY_CIPHER] = { .type = NLA_U32 },
375
	[NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
376
377
	[NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
	[NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
378
	[NL80211_KEY_TYPE] = { .type = NLA_U32 },
379
380
381
382
383
384
385
386
	[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 },
387
388
};

389
390
391
392
393
394
395
/* 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 },
396
397
398
399
	[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 },
400
401
};

402
403
404
405
406
407
408
409
/* 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 },
};

410
411
static const struct nla_policy
nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
412
	[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
413
						 .len = IEEE80211_MAX_SSID_LEN },
414
	[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
415
416
};

417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
/* 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;
}

437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
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);
461
462
	if (IS_ERR(*rdev)) {
		err = PTR_ERR(*rdev);
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
		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();
}

478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
/* 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;
}

508
/* message building helper */
509
static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
510
511
512
				   int flags, u8 cmd)
{
	/* since there is no private header just add the generic one */
513
	return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
514
515
}

516
517
518
static int nl80211_msg_put_channel(struct sk_buff *msg,
				   struct ieee80211_channel *chan)
{
519
520
521
	if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
			chan->center_freq))
		goto nla_put_failure;
522

523
524
525
526
527
528
529
530
531
532
533
534
	if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
		goto nla_put_failure;
	if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
		goto nla_put_failure;
	if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
		goto nla_put_failure;
	if ((chan->flags & IEEE80211_CHAN_RADAR) &&
	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
		goto nla_put_failure;
535

536
537
538
	if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
			DBM_TO_MBM(chan->max_power)))
		goto nla_put_failure;
539
540
541
542
543
544
545

	return 0;

 nla_put_failure:
	return -ENOBUFS;
}

546
547
/* netlink command implementations */

548
549
550
struct key_parse {
	struct key_params p;
	int idx;
551
	int type;
552
	bool def, defmgmt;
553
	bool def_uni, def_multi;
554
555
556
557
558
559
560
561
562
563
564
565
566
};

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];

567
568
569
570
571
572
573
	if (k->def) {
		k->def_uni = true;
		k->def_multi = true;
	}
	if (k->defmgmt)
		k->def_multi = true;

574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
	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]);

590
591
592
593
594
595
	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;
	}

596
597
	if (tb[NL80211_KEY_DEFAULT_TYPES]) {
		struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
598
599
600
		err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
				       tb[NL80211_KEY_DEFAULT_TYPES],
				       nl80211_key_default_policy);
601
602
603
604
605
606
607
		if (err)
			return err;

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

608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
	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];

632
633
634
635
636
637
638
	if (k->def) {
		k->def_uni = true;
		k->def_multi = true;
	}
	if (k->defmgmt)
		k->def_multi = true;

639
640
641
642
643
644
	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;
	}

645
646
647
648
649
650
651
652
653
654
655
656
657
	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];
	}

658
659
660
661
662
663
664
665
666
	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;
667
	k->type = -1;
668
669
670
671
672
673
674
675
676
677
678
679

	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;

680
681
682
683
684
	if (k->defmgmt) {
		if (k->def_uni || !k->def_multi)
			return -EINVAL;
	}

685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
	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
701
702
static struct cfg80211_cached_keys *
nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
703
		       struct nlattr *keys, bool *no_ht)
Johannes Berg's avatar
Johannes Berg committed
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
{
	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;
734
735
			if (!parse.def_uni || !parse.def_multi)
				goto error;
Johannes Berg's avatar
Johannes Berg committed
736
737
738
		} else if (parse.defmgmt)
			goto error;
		err = cfg80211_validate_key_settings(rdev, &parse.p,
739
						     parse.idx, false, NULL);
Johannes Berg's avatar
Johannes Berg committed
740
741
742
743
744
745
		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);
746
747
748
749
750
751

		if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
		    parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
			if (no_ht)
				*no_ht = true;
		}
Johannes Berg's avatar
Johannes Berg committed
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
	}

	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:
767
	case NL80211_IFTYPE_P2P_GO:
768
	case NL80211_IFTYPE_MESH_POINT:
Johannes Berg's avatar
Johannes Berg committed
769
770
771
772
773
774
		break;
	case NL80211_IFTYPE_ADHOC:
		if (!wdev->current_bss)
			return -ENOLINK;
		break;
	case NL80211_IFTYPE_STATION:
775
	case NL80211_IFTYPE_P2P_CLIENT:
Johannes Berg's avatar
Johannes Berg committed
776
777
778
779
780
781
782
783
784
785
		if (wdev->sme_state != CFG80211_SME_CONNECTED)
			return -ENOLINK;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

786
787
788
789
790
791
792
793
794
795
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) {
796
797
		if ((ifmodes & 1) && nla_put_flag(msg, i))
			goto nla_put_failure;
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
		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;
840
841
842
			if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
					c->limits[j].max))
				goto nla_put_failure;
843
844
845
846
847
848
849
850
			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);

851
852
853
854
855
856
857
858
		if (c->beacon_int_infra_match &&
		    nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
			goto nla_put_failure;
		if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
				c->num_different_channels) ||
		    nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
				c->max_interfaces))
			goto nla_put_failure;
859
860
861
862
863
864
865
866
867
868
869

		nla_nest_end(msg, nl_combi);
	}

	nla_nest_end(msg, nl_combis);

	return 0;
nla_put_failure:
	return -ENOBUFS;
}

870
static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
871
872
873
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
874
875
876
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
877
	struct nlattr *nl_cmds;
878
879
880
881
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
882
883
	const struct ieee80211_txrx_stypes *mgmt_stypes =
				dev->wiphy.mgmt_stypes;
884

885
	hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
886
887
888
	if (!hdr)
		return -1;

889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
	if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
	    nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
	    nla_put_u32(msg, NL80211_ATTR_GENERATION,
			cfg80211_rdev_list_generation) ||
	    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) ||
	    nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
		       dev->wiphy.coverage_class) ||
	    nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		       dev->wiphy.max_scan_ssids) ||
	    nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
		       dev->wiphy.max_sched_scan_ssids) ||
	    nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
			dev->wiphy.max_scan_ie_len) ||
	    nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
			dev->wiphy.max_sched_scan_ie_len) ||
	    nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
		       dev->wiphy.max_match_sets))
		goto nla_put_failure;

	if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
	    nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
		goto nla_put_failure;
	if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
	    nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
		goto nla_put_failure;
	if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
	    nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
		goto nla_put_failure;
	if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
	    nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
		goto nla_put_failure;
	if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
	    nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
		goto nla_put_failure;
	if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
	    nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
		goto nla_put_failure;

	if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
		    sizeof(u32) * dev->wiphy.n_cipher_suites,
		    dev->wiphy.cipher_suites))
		goto nla_put_failure;

	if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
		       dev->wiphy.max_num_pmkids))
		goto nla_put_failure;

	if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
	    nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
		goto nla_put_failure;

	if (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))
		goto nla_put_failure;

	if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
	    nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
			dev->wiphy.probe_resp_offload))
		goto nla_put_failure;
957

958
959
	if ((dev->wiphy.available_antennas_tx ||
	     dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
960
961
		u32 tx_ant = 0, rx_ant = 0;
		int res;
962
		res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
963
		if (!res) {
964
965
966
967
968
			if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
					tx_ant) ||
			    nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
					rx_ant))
				goto nla_put_failure;
969
970
971
		}
	}

972
973
	if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
				dev->wiphy.interface_modes))
974
975
		goto nla_put_failure;

976
977
978
979
980
981
982
983
984
985
986
987
	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;

988
		/* add HT info */
989
990
991
992
993
994
995
996
997
998
999
		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)))
			goto nla_put_failure;
1000

1001
1002
1003
1004
1005
1006
1007
1008
1009
		/* add VHT info */
		if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
		    (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
			     sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
			     &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
		     nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
				 dev->wiphy.bands[band]->vht_cap.cap)))
			goto nla_put_failure;

1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
		/* 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];
1021
1022
1023

			if (nl80211_msg_put_channel(msg, chan))
				goto nla_put_failure;
1024

1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
			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];
1041
1042
1043
1044
1045
1046
1047
			if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
					rate->bitrate))
				goto nla_put_failure;
			if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
			    nla_put_flag(msg,
					 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
				goto nla_put_failure;
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057

			nla_nest_end(msg, nl_rate);
		}

		nla_nest_end(msg, nl_rates);

		nla_nest_end(msg, nl_band);
	}
	nla_nest_end(msg, nl_bands);

1058
1059
1060
1061
1062
1063
1064
1065
1066
	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++;					\
1067
1068
			if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
				goto nla_put_failure;		\
1069
1070
1071
1072
1073
1074
		}						\
	} while (0)

	CMD(add_virtual_intf, NEW_INTERFACE);
	CMD(change_virtual_intf, SET_INTERFACE);
	CMD(add_key, NEW_KEY);
1075
	CMD(start_ap, START_AP);
1076
1077
	CMD(add_station, NEW_STATION);
	CMD(add_mpath, NEW_MPATH);
1078
	CMD(update_mesh_config, SET_MESH_CONFIG);
1079
	CMD(change_bss, SET_BSS);
1080
1081
1082
1083
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
Johannes Berg's avatar
Johannes Berg committed
1084
	CMD(join_ibss, JOIN_IBSS);
1085
	CMD(join_mesh, JOIN_MESH);
Samuel Ortiz's avatar
Samuel Ortiz committed
1086
1087
1088
	CMD(set_pmksa, SET_PMKSA);
	CMD(del_pmksa, DEL_PMKSA);
	CMD(flush_pmksa, FLUSH_PMKSA);
1089
1090
	if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
		CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1091
	CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1092
	CMD(mgmt_tx, FRAME);
1093
	CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1094
	if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1095
		i++;
1096
1097
		if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
			goto nla_put_failure;
1098
	}
1099
	if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1100
	    dev->ops->join_mesh) {
1101
1102
1103
1104
		i++;
		if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
			goto nla_put_failure;
	}
1105
	CMD(set_wds_peer, SET_WDS_PEER);
1106
1107
1108
1109
	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
		CMD(tdls_mgmt, TDLS_MGMT);
		CMD(tdls_oper, TDLS_OPER);
	}
1110
1111
	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
		CMD(sched_scan_start, START_SCHED_SCAN);
1112
	CMD(probe_client, PROBE_CLIENT);
1113
	CMD(set_noack_map, SET_NOACK_MAP);
1114
1115
	if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
		i++;
1116
1117
		if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
			goto nla_put_failure;
1118
	}
1119
	CMD(start_p2p_device, START_P2P_DEVICE);
1120
	CMD(set_mcast_rate, SET_MCAST_RATE);
1121

1122
1123
1124
1125
#ifdef CONFIG_NL80211_TESTMODE
	CMD(testmode_cmd, TESTMODE);
#endif

1126
#undef CMD
1127

1128
	if (dev->ops->connect || dev->ops->auth) {
1129
		i++;
1130
1131
		if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
			goto nla_put_failure;
1132
1133
	}

1134
	if (dev->ops->disconnect || dev->ops->deauth) {
1135
		i++;
1136
1137
		if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
			goto nla_put_failure;
1138
1139
	}

1140
1141
	nla_nest_end(msg, nl_cmds);

1142
	if (dev->ops->remain_on_channel &&
1143
1144
1145
1146
	    (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
	    nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
			dev->wiphy.max_remain_on_channel_duration))
		goto nla_put_failure;
1147

1148
1149
1150
	if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
	    nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
		goto nla_put_failure;
1151

1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
	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) {
1168
1169
1170
1171
				if ((stypes & 1) &&
				    nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
						(i << 4) | IEEE80211_FTYPE_MGMT))
					goto nla_put_failure;
1172
1173
1174
1175
1176
1177
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}

Johannes Berg's avatar
Johannes Berg committed
1178
1179
		nla_nest_end(msg, nl_ifs);

1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
		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) {
1191
1192
1193
1194
				if ((stypes & 1) &&
				    nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
						(i << 4) | IEEE80211_FTYPE_MGMT))
					goto nla_put_failure;
1195
1196
1197
1198
1199
1200
1201
1202
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}
		nla_nest_end(msg, nl_ifs);
	}

1203
#ifdef CONFIG_PM
1204
1205
1206
1207
1208
1209
1210
1211
	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;

1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
		if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
		     nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
		    ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
		     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
		    ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
		     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
		    ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
		     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
		    ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
		     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
		    ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
		     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
		    ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
		     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
		    ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
		     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
		    goto nla_put_failure;
1229
1230
1231
1232
1233
1234
1235
1236
		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,
			};
1237
1238
1239
			if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
				    sizeof(pat), &pat))
				goto nla_put_failure;
1240
1241
1242
1243
		}

		nla_nest_end(msg, nl_wowlan);
	}
1244
#endif
1245

1246
1247
1248
1249
1250
1251
1252
	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;

1253
1254
1255
1256
	if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
	    nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
			dev->wiphy.ap_sme_capa))
		goto nla_put_failure;
1257

1258
1259
1260
	if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
			dev->wiphy.features))
		goto nla_put_failure;
1261

1262
1263
1264
1265
1266
	if (dev->wiphy.ht_capa_mod_mask &&
	    nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
		    sizeof(*dev->wiphy.ht_capa_mod_mask),
		    dev->wiphy.ht_capa_mod_mask))
		goto nla_put_failure;
1267

1268
1269
1270
	return genlmsg_end(msg, hdr);

 nla_put_failure:
1271
1272
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
1273
1274
1275
1276
1277
1278
1279
1280
}

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;

1281
	mutex_lock(&cfg80211_mutex);
1282
	list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1283
1284
		if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
			continue;
1285
		if (++idx <= start)
1286
			continue;
1287
		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1288
				       cb->nlh->nlmsg_seq, NLM_F_MULTI,
1289
1290
				       dev) < 0) {
			idx--;
1291
			break;
1292
		}
1293
	}
1294
	mutex_unlock(&cfg80211_mutex);
1295
1296
1297
1298
1299
1300
1301
1302
1303

	cb->args[0] = idx;

	return skb->len;
}

static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
{
	struct sk_buff *msg;
1304
	struct cfg80211_registered_device *dev = info->user_ptr[0];
1305

1306
	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1307
	if (!msg)
1308
		return -ENOMEM;
1309

1310
	if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1311
1312
1313
		nlmsg_free(msg);
		return -ENOBUFS;
	}
1314

Johannes Berg's avatar
Johannes Berg committed
1315
	return genlmsg_reply(msg, info);
1316
1317
}