nl80211.c 364 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
 * Copyright 2013-2014  Intel Mobile Communications GmbH
Beni Lev's avatar
Beni Lev committed
6
 * Copyright 2015-2016	Intel Deutschland GmbH
7 8 9 10 11
 */

#include <linux/if.h>
#include <linux/module.h>
#include <linux/err.h>
12
#include <linux/slab.h>
13 14 15 16 17 18
#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>
19
#include <linux/etherdevice.h>
20
#include <net/net_namespace.h>
21 22
#include <net/genetlink.h>
#include <net/cfg80211.h>
23
#include <net/sock.h>
24
#include <net/inet_connection_sock.h>
25 26
#include "core.h"
#include "nl80211.h"
27
#include "reg.h"
28
#include "rdev-ops.h"
29

30 31 32 33 34
static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
				   struct genl_info *info,
				   struct cfg80211_crypto_settings *settings,
				   int cipher_limit);

35
static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
36
			    struct genl_info *info);
37
static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
38 39
			      struct genl_info *info);

40 41
/* the netlink family */
static struct genl_family nl80211_fam = {
42 43 44 45
	.id = GENL_ID_GENERATE,		/* don't bother with a hardcoded ID */
	.name = NL80211_GENL_NAME,	/* have users key off the name instead */
	.hdrsize = 0,			/* no private header */
	.version = 1,			/* no particular meaning now */
46
	.maxattr = NL80211_ATTR_MAX,
47
	.netnsok = true,
48 49
	.pre_doit = nl80211_pre_doit,
	.post_doit = nl80211_post_doit,
50 51
};

52 53 54 55 56 57
/* multicast groups */
enum nl80211_multicast_groups {
	NL80211_MCGRP_CONFIG,
	NL80211_MCGRP_SCAN,
	NL80211_MCGRP_REGULATORY,
	NL80211_MCGRP_MLME,
58
	NL80211_MCGRP_VENDOR,
59 60 61 62
	NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
};

static const struct genl_multicast_group nl80211_mcgrps[] = {
63 64 65 66 67
	[NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
	[NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
	[NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
	[NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
	[NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
68
#ifdef CONFIG_NL80211_TESTMODE
69
	[NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
70 71 72
#endif
};

73 74 75
/* returns ERR_PTR values */
static struct wireless_dev *
__cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
76
{
77 78 79 80 81 82 83
	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;
84

85
	ASSERT_RTNL();
86

87 88
	if (!have_ifidx && !have_wdev_id)
		return ERR_PTR(-EINVAL);
89

90 91 92 93 94
	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;
95 96
	}

97 98 99 100 101 102 103 104 105
	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;

106
		list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124
			if (have_ifidx && wdev->netdev &&
			    wdev->netdev->ifindex == ifidx) {
				result = wdev;
				break;
			}
			if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
				result = wdev;
				break;
			}
		}

		if (result)
			break;
	}

	if (result)
		return result;
	return ERR_PTR(-ENODEV);
125 126
}

127
static struct cfg80211_registered_device *
128
__cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
129
{
130 131
	struct cfg80211_registered_device *rdev = NULL, *tmp;
	struct net_device *netdev;
132

133
	ASSERT_RTNL();
134

135
	if (!attrs[NL80211_ATTR_WIPHY] &&
136 137
	    !attrs[NL80211_ATTR_IFINDEX] &&
	    !attrs[NL80211_ATTR_WDEV])
138 139
		return ERR_PTR(-EINVAL);

140
	if (attrs[NL80211_ATTR_WIPHY])
141
		rdev = cfg80211_rdev_by_wiphy_idx(
142
				nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
143

144 145 146 147 148 149 150 151
	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 */
152
			list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
153 154 155 156 157 158 159 160 161 162 163 164 165 166 167
				if (wdev->identifier != (u32)wdev_id)
					continue;
				found = true;
				break;
			}

			if (!found)
				tmp = NULL;

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

168 169
	if (attrs[NL80211_ATTR_IFINDEX]) {
		int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
170

171
		netdev = __dev_get_by_index(netns, ifindex);
172 173
		if (netdev) {
			if (netdev->ieee80211_ptr)
174 175
				tmp = wiphy_to_rdev(
					netdev->ieee80211_ptr->wiphy);
176 177 178 179 180 181 182 183 184 185 186 187
			else
				tmp = NULL;

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

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

			rdev = tmp;
188 189 190
		}
	}

Johannes Berg's avatar
Johannes Berg committed
191 192
	if (!rdev)
		return ERR_PTR(-ENODEV);
193

Johannes Berg's avatar
Johannes Berg committed
194 195 196 197
	if (netns != wiphy_net(&rdev->wiphy))
		return ERR_PTR(-ENODEV);

	return rdev;
198 199 200 201 202 203 204 205 206 207
}

/*
 * This function returns a pointer to the driver
 * that the genl_info item that is passed refers to.
 *
 * 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
208
cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
209
{
210
	return __cfg80211_rdev_from_attrs(netns, info->attrs);
211 212
}

213
/* policy for the attributes */
214
static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
215 216
	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
217
				      .len = 20-1 },
218
	[NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
219

220
	[NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
Sujith's avatar
Sujith committed
221
	[NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
222 223 224 225
	[NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
	[NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
	[NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },

226 227 228 229
	[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 },
230
	[NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
231
	[NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
232 233 234 235

	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
236

237 238
	[NL80211_ATTR_MAC] = { .len = ETH_ALEN },
	[NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
239

240
	[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
241 242 243 244 245
	[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 },
246
	[NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
247
	[NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
248 249 250 251 252 253 254

	[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 },
255 256 257 258 259
	[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 },
260
	[NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
261
	[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
Johannes Berg's avatar
Johannes Berg committed
262
	[NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
263
	[NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
264
				   .len = IEEE80211_MAX_MESH_ID_LEN },
265
	[NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
266

267 268 269
	[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
	[NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },

270 271 272
	[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 },
273 274
	[NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
					   .len = NL80211_MAX_SUPP_RATES },
275
	[NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
276

277
	[NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
278
	[NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
279

280
	[NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
281 282 283 284

	[NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
	[NL80211_ATTR_IE] = { .type = NLA_BINARY,
			      .len = IEEE80211_MAX_DATA_LEN },
285 286
	[NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
	[NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
287 288 289 290 291

	[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
292
	[NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
293
	[NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
294
	[NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
295 296 297
	[NL80211_ATTR_STA_FLAGS2] = {
		.len = sizeof(struct nl80211_sta_flag_update),
	},
298
	[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
299 300
	[NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
	[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
301 302 303
	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
304
	[NL80211_ATTR_PID] = { .type = NLA_U32 },
305
	[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
Samuel Ortiz's avatar
Samuel Ortiz committed
306 307
	[NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
				 .len = WLAN_PMKID_LEN },
308 309
	[NL80211_ATTR_DURATION] = { .type = NLA_U32 },
	[NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
310
	[NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
311 312 313
	[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
314
	[NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
315
	[NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
316
	[NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
317
	[NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
318 319
	[NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
320
	[NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
321 322
	[NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
	[NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
323
	[NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
324
	[NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
325
	[NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
326
	[NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
327
	[NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
328
	[NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
329
	[NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
330
	[NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
331
	[NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
332 333 334 335
	[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 },
336
	[NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
337
	[NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
338
	[NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
339 340 341 342 343
	[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 },
344
	[NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
345
	[NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
346 347
	[NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
				      .len = IEEE80211_MAX_DATA_LEN },
348
	[NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
349 350 351 352
	[NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
	[NL80211_ATTR_HT_CAPABILITY_MASK] = {
		.len = NL80211_HT_CAPABILITY_LEN
	},
353
	[NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
354
	[NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
355
	[NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
356
	[NL80211_ATTR_WDEV] = { .type = NLA_U64 },
357
	[NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
358
	[NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
359
	[NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
360
	[NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
361 362
	[NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
	[NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
363 364
	[NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
	[NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
365 366
	[NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
	[NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
367
	[NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
368 369 370 371
	[NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
	[NL80211_ATTR_VHT_CAPABILITY_MASK] = {
		.len = NL80211_VHT_CAPABILITY_LEN,
	},
372 373 374
	[NL80211_ATTR_MDID] = { .type = NLA_U16 },
	[NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
				  .len = IEEE80211_MAX_DATA_LEN },
375
	[NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
376 377 378
	[NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
	[NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
	[NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
379 380
	[NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
	[NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
381 382
	[NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
	[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
383
	[NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
384
	[NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
385 386 387
	[NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
	[NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
	[NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
388 389
	[NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
				   .len = IEEE80211_QOS_MAP_LEN_MAX },
390 391
	[NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
	[NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
392
	[NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
393
	[NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
394
	[NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
395
	[NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
396 397 398
	[NL80211_ATTR_TSID] = { .type = NLA_U8 },
	[NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
	[NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
399
	[NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
400
	[NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
401
	[NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
402
	[NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
403
	[NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
404
	[NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
405
	[NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
406
	[NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
407
	[NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
408 409 410 411
	[NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
		.len = VHT_MUMIMO_GROUPS_DATA_LEN
	},
	[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
412 413
};

414
/* policy for the key attributes */
Alexey Dobriyan's avatar
Alexey Dobriyan committed
415
static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
Johannes Berg's avatar
Johannes Berg committed
416
	[NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
417 418
	[NL80211_KEY_IDX] = { .type = NLA_U8 },
	[NL80211_KEY_CIPHER] = { .type = NLA_U32 },
419
	[NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
420 421
	[NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
	[NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
422
	[NL80211_KEY_TYPE] = { .type = NLA_U32 },
423 424 425 426 427 428 429 430
	[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 },
431 432
};

433 434 435 436 437 438 439
/* 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 },
440 441 442 443
	[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 },
444
	[NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
445
	[NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464
};

static const struct nla_policy
nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
	[NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
	[NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
	[NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
	[NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
	[NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
	[NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
	[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
		.len = sizeof(struct nl80211_wowlan_tcp_data_seq)
	},
	[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
		.len = sizeof(struct nl80211_wowlan_tcp_data_token)
	},
	[NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
	[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
	[NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
465 466
};

467 468 469 470 471 472 473 474
/* policy for coalesce rule attributes */
static const struct nla_policy
nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
	[NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
	[NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
	[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
};

475 476 477 478 479 480 481 482
/* 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 },
};

483 484
static const struct nla_policy
nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
485
	[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
486
						 .len = IEEE80211_MAX_SSID_LEN },
487
	[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
488 489
};

490 491 492 493 494 495
static const struct nla_policy
nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
	[NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
	[NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
};

496 497 498 499 500 501 502 503 504
static const struct nla_policy
nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
	[NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
	[NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
	[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
		.len = sizeof(struct nl80211_bss_select_rssi_adjust)
	},
};

505 506 507 508
static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
				     struct netlink_callback *cb,
				     struct cfg80211_registered_device **rdev,
				     struct wireless_dev **wdev)
509
{
510
	int err;
511

512
	rtnl_lock();
513

514 515 516 517 518 519
	if (!cb->args[0]) {
		err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
				  nl80211_fam.attrbuf, nl80211_fam.maxattr,
				  nl80211_policy);
		if (err)
			goto out_unlock;
520

521 522 523 524 525 526
		*wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
						   nl80211_fam.attrbuf);
		if (IS_ERR(*wdev)) {
			err = PTR_ERR(*wdev);
			goto out_unlock;
		}
527
		*rdev = wiphy_to_rdev((*wdev)->wiphy);
528 529
		/* 0 is the first index - add 1 to parse only once */
		cb->args[0] = (*rdev)->wiphy_idx + 1;
530 531
		cb->args[1] = (*wdev)->identifier;
	} else {
532 533
		/* subtract the 1 again here */
		struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
534
		struct wireless_dev *tmp;
535

536 537 538 539
		if (!wiphy) {
			err = -ENODEV;
			goto out_unlock;
		}
540
		*rdev = wiphy_to_rdev(wiphy);
541
		*wdev = NULL;
542

543
		list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
544 545 546 547 548
			if (tmp->identifier == cb->args[1]) {
				*wdev = tmp;
				break;
			}
		}
549

550 551 552 553
		if (!*wdev) {
			err = -ENODEV;
			goto out_unlock;
		}
554 555 556
	}

	return 0;
557
 out_unlock:
558 559 560 561
	rtnl_unlock();
	return err;
}

562
static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
563 564 565 566
{
	rtnl_unlock();
}

567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596
/* 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;
}

597
/* message building helper */
598
static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
599 600 601
				   int flags, u8 cmd)
{
	/* since there is no private header just add the generic one */
602
	return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
603 604
}

605
static int nl80211_msg_put_channel(struct sk_buff *msg,
606 607
				   struct ieee80211_channel *chan,
				   bool large)
608
{
609 610 611 612 613 614 615
	/* Some channels must be completely excluded from the
	 * list to protect old user-space tools from breaking
	 */
	if (!large && chan->flags &
	    (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
		return 0;

616 617 618
	if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
			chan->center_freq))
		goto nla_put_failure;
619

620 621 622
	if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
		goto nla_put_failure;
623 624 625 626 627 628
	if (chan->flags & IEEE80211_CHAN_NO_IR) {
		if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
			goto nla_put_failure;
		if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
			goto nla_put_failure;
	}
629 630 631 632 633 634 635 636 637 638 639 640 641 642
	if (chan->flags & IEEE80211_CHAN_RADAR) {
		if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
			goto nla_put_failure;
		if (large) {
			u32 time;

			time = elapsed_jiffies_msecs(chan->dfs_state_entered);

			if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
					chan->dfs_state))
				goto nla_put_failure;
			if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
					time))
				goto nla_put_failure;
643 644 645 646
			if (nla_put_u32(msg,
					NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
					chan->dfs_cac_ms))
				goto nla_put_failure;
647 648
		}
	}
649

650 651 652 653 654 655 656 657 658 659 660 661 662
	if (large) {
		if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
			goto nla_put_failure;
		if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
			goto nla_put_failure;
		if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
			goto nla_put_failure;
		if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
			goto nla_put_failure;
663 664 665
		if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
			goto nla_put_failure;
666 667
		if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
668
			goto nla_put_failure;
669 670 671 672 673 674
		if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
			goto nla_put_failure;
		if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
			goto nla_put_failure;
675 676
	}

677 678 679
	if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
			DBM_TO_MBM(chan->max_power)))
		goto nla_put_failure;
680 681 682 683 684 685 686

	return 0;

 nla_put_failure:
	return -ENOBUFS;
}

687 688
/* netlink command implementations */

689 690 691
struct key_parse {
	struct key_params p;
	int idx;
692
	int type;
693
	bool def, defmgmt;
694
	bool def_uni, def_multi;
695 696 697 698 699 700 701 702 703 704 705 706 707
};

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];

708 709 710 711 712 713 714
	if (k->def) {
		k->def_uni = true;
		k->def_multi = true;
	}
	if (k->defmgmt)
		k->def_multi = true;

715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730
	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]);

731 732 733 734 735 736
	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;
	}

737 738
	if (tb[NL80211_KEY_DEFAULT_TYPES]) {
		struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
739

740 741 742
		err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
				       tb[NL80211_KEY_DEFAULT_TYPES],
				       nl80211_key_default_policy);
743 744 745 746 747 748 749
		if (err)
			return err;

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

750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773
	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];

774 775 776 777 778 779 780
	if (k->def) {
		k->def_uni = true;
		k->def_multi = true;
	}
	if (k->defmgmt)
		k->def_multi = true;

781 782 783 784 785 786
	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;
	}

787 788 789 790 791 792 793 794 795 796 797 798 799
	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];
	}

800 801 802 803 804 805 806 807 808
	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;
809
	k->type = -1;
810 811 812 813 814 815 816 817 818 819 820 821

	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;

822 823 824 825 826
	if (k->defmgmt) {
		if (k->def_uni || !k->def_multi)
			return -EINVAL;
	}

827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842
	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
843 844
static struct cfg80211_cached_keys *
nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
845
		       struct nlattr *keys, bool *no_ht)
Johannes Berg's avatar
Johannes Berg committed
846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867
{
	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;

	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;
868
		if (parse.idx < 0 || parse.idx > 3)
Johannes Berg's avatar
Johannes Berg committed
869 870 871 872 873 874
			goto error;
		if (parse.def) {
			if (def)
				goto error;
			def = 1;
			result->def = parse.idx;
875 876
			if (!parse.def_uni || !parse.def_multi)
				goto error;
Johannes Berg's avatar
Johannes Berg committed
877 878 879
		} else if (parse.defmgmt)
			goto error;
		err = cfg80211_validate_key_settings(rdev, &parse.p,
880
						     parse.idx, false, NULL);
Johannes Berg's avatar
Johannes Berg committed
881 882
		if (err)
			goto error;
883 884 885 886 887
		if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
		    parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
			err = -EINVAL;
			goto error;
		}
Johannes Berg's avatar
Johannes Berg committed
888 889 890 891
		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);
892

893 894 895
		/* must be WEP key if we got here */
		if (no_ht)
			*no_ht = true;
Johannes Berg's avatar
Johannes Berg committed
896 897 898 899 900 901 902 903 904 905 906 907 908 909 910
	}

	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:
911
	case NL80211_IFTYPE_P2P_GO:
912
	case NL80211_IFTYPE_MESH_POINT:
Johannes Berg's avatar
Johannes Berg committed
913 914 915
		break;
	case NL80211_IFTYPE_ADHOC:
	case NL80211_IFTYPE_STATION:
916
	case NL80211_IFTYPE_P2P_CLIENT:
917
		if (!wdev->current_bss)
Johannes Berg's avatar
Johannes Berg committed
918 919
			return -ENOLINK;
		break;
920
	case NL80211_IFTYPE_UNSPECIFIED:
921
	case NL80211_IFTYPE_OCB:
922 923 924 925
	case NL80211_IFTYPE_MONITOR:
	case NL80211_IFTYPE_P2P_DEVICE:
	case NL80211_IFTYPE_WDS:
	case NUM_NL80211_IFTYPES:
Johannes Berg's avatar
Johannes Berg committed
926 927 928 929 930 931
		return -EINVAL;
	}

	return 0;
}

932 933 934 935 936 937 938 939 940 941 942 943 944
static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
							struct nlattr *tb)
{
	struct ieee80211_channel *chan;

	if (tb == NULL)
		return NULL;
	chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
	if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
		return NULL;
	return chan;
}

945 946 947 948 949 950 951 952 953 954
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) {
955 956
		if ((ifmodes & 1) && nla_put_flag(msg, i))
			goto nla_put_failure;
957 958 959 960 961 962 963 964 965 966 967 968
		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,
969 970
					  struct sk_buff *msg,
					  bool large)
971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999
{
	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;
1000 1001 1002
			if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
					c->limits[j].max))
				goto nla_put_failure;