1 /*
2 * This is the new netlink-based wireless configuration interface.
3 *
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright 2015-2016 Intel Deutschland GmbH
7 */
8
9 #include <linux/if.h>
10 #include <linux/module.h>
11 #include <linux/err.h>
12 #include <linux/slab.h>
13 #include <linux/list.h>
14 #include <linux/if_ether.h>
15 #include <linux/ieee80211.h>
16 #include <linux/nl80211.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/netlink.h>
19 #include <linux/etherdevice.h>
20 #include <net/net_namespace.h>
21 #include <net/genetlink.h>
22 #include <net/cfg80211.h>
23 #include <net/sock.h>
24 #include <net/inet_connection_sock.h>
25 #include "core.h"
26 #include "nl80211.h"
27 #include "reg.h"
28 #include "rdev-ops.h"
29
30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
31 struct genl_info *info,
32 struct cfg80211_crypto_settings *settings,
33 int cipher_limit);
34
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 struct genl_info *info);
39
40 /* the netlink family */
41 static struct genl_family nl80211_fam = {
42 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
43 .name = NL80211_GENL_NAME, /* have users key off the name instead */
44 .hdrsize = 0, /* no private header */
45 .version = 1, /* no particular meaning now */
46 .maxattr = NL80211_ATTR_MAX,
47 .netnsok = true,
48 .pre_doit = nl80211_pre_doit,
49 .post_doit = nl80211_post_doit,
50 };
51
52 /* multicast groups */
53 enum nl80211_multicast_groups {
54 NL80211_MCGRP_CONFIG,
55 NL80211_MCGRP_SCAN,
56 NL80211_MCGRP_REGULATORY,
57 NL80211_MCGRP_MLME,
58 NL80211_MCGRP_VENDOR,
59 NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
60 };
61
62 static const struct genl_multicast_group nl80211_mcgrps[] = {
63 [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
64 [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
65 [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
66 [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
67 [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
68 #ifdef CONFIG_NL80211_TESTMODE
69 [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
70 #endif
71 };
72
73 /* returns ERR_PTR values */
74 static struct wireless_dev *
75 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
76 {
77 struct cfg80211_registered_device *rdev;
78 struct wireless_dev *result = NULL;
79 bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
80 bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
81 u64 wdev_id;
82 int wiphy_idx = -1;
83 int ifidx = -1;
84
85 ASSERT_RTNL();
86
87 if (!have_ifidx && !have_wdev_id)
88 return ERR_PTR(-EINVAL);
89
90 if (have_ifidx)
91 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
92 if (have_wdev_id) {
93 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
94 wiphy_idx = wdev_id >> 32;
95 }
96
97 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
98 struct wireless_dev *wdev;
99
100 if (wiphy_net(&rdev->wiphy) != netns)
101 continue;
102
103 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
104 continue;
105
106 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
107 if (have_ifidx && wdev->netdev &&
108 wdev->netdev->ifindex == ifidx) {
109 result = wdev;
110 break;
111 }
112 if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
113 result = wdev;
114 break;
115 }
116 }
117
118 if (result)
119 break;
120 }
121
122 if (result)
123 return result;
124 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 struct cfg80211_registered_device *rdev = NULL, *tmp;
131 struct net_device *netdev;
132
133 ASSERT_RTNL();
134
135 if (!attrs[NL80211_ATTR_WIPHY] &&
136 !attrs[NL80211_ATTR_IFINDEX] &&
137 !attrs[NL80211_ATTR_WDEV])
138 return ERR_PTR(-EINVAL);
139
140 if (attrs[NL80211_ATTR_WIPHY])
141 rdev = cfg80211_rdev_by_wiphy_idx(
142 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
143
144 if (attrs[NL80211_ATTR_WDEV]) {
145 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
146 struct wireless_dev *wdev;
147 bool found = false;
148
149 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
150 if (tmp) {
151 /* make sure wdev exists */
152 list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
153 if (wdev->identifier != (u32)wdev_id)
154 continue;
155 found = true;
156 break;
157 }
158
159 if (!found)
160 tmp = NULL;
161
162 if (rdev && tmp != rdev)
163 return ERR_PTR(-EINVAL);
164 rdev = tmp;
165 }
166 }
167
168 if (attrs[NL80211_ATTR_IFINDEX]) {
169 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
170
171 netdev = __dev_get_by_index(netns, ifindex);
172 if (netdev) {
173 if (netdev->ieee80211_ptr)
174 tmp = wiphy_to_rdev(
175 netdev->ieee80211_ptr->wiphy);
176 else
177 tmp = NULL;
178
179 /* not wireless device -- return error */
180 if (!tmp)
181 return ERR_PTR(-EINVAL);
182
183 /* mismatch -- return error */
184 if (rdev && tmp != rdev)
185 return ERR_PTR(-EINVAL);
186
187 rdev = tmp;
188 }
189 }
190
191 if (!rdev)
192 return ERR_PTR(-ENODEV);
193
194 if (netns != wiphy_net(&rdev->wiphy))
195 return ERR_PTR(-ENODEV);
196
197 return rdev;
198 }
199
200 /*
201 * This function returns a pointer to the driver
202 * that the genl_info item that is passed refers to.
203 *
204 * The result of this can be a PTR_ERR and hence must
205 * be checked with IS_ERR() for errors.
206 */
207 static struct cfg80211_registered_device *
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 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
216 [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 },
221 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
222 [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
223 [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
224 [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
225
226 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
227 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
228 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
229 [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 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
234 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
235 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
236
237 [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
238 [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
239
240 [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
241 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
242 .len = WLAN_MAX_KEY_LEN },
243 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
244 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
245 [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 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
250 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
251 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
252 .len = IEEE80211_MAX_DATA_LEN },
253 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
254 .len = IEEE80211_MAX_DATA_LEN },
255 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
256 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
257 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
258 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
259 .len = NL80211_MAX_SUPP_RATES },
260 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
261 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
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 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
268 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
269
270 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
271 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
272 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
273 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
274 .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 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
283 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
284 .len = IEEE80211_MAX_DATA_LEN },
285 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
286 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
287
288 [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
289 .len = IEEE80211_MAX_SSID_LEN },
290 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
291 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
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 [NL80211_ATTR_STA_FLAGS2] = {
296 .len = sizeof(struct nl80211_sta_flag_update),
297 },
298 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
299 [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
300 [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
301 [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
302 [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
303 [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
304 [NL80211_ATTR_PID] = { .type = NLA_U32 },
305 [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
306 [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
307 .len = WLAN_PMKID_LEN },
308 [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
309 [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
310 [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
311 [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
312 .len = IEEE80211_MAX_DATA_LEN },
313 [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
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 [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
319 [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
320 [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
321 [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
322 [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 [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
333 .len = IEEE80211_MAX_DATA_LEN },
334 [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
335 .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 [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
340 [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
341 [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
342 [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
343 [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 [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
347 .len = IEEE80211_MAX_DATA_LEN },
348 [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
349 [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
350 [NL80211_ATTR_HT_CAPABILITY_MASK] = {
351 .len = NL80211_HT_CAPABILITY_LEN
352 },
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 [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
362 [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
363 [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
364 [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
365 [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
366 [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
367 [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
368 [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
369 [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
370 .len = NL80211_VHT_CAPABILITY_LEN,
371 },
372 [NL80211_ATTR_MDID] = { .type = NLA_U16 },
373 [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
374 .len = IEEE80211_MAX_DATA_LEN },
375 [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
376 [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
377 [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
378 [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
379 [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
380 [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
381 [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
382 [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 [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
386 [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
387 [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
388 [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
389 .len = IEEE80211_QOS_MAP_LEN_MAX },
390 [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
391 [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 [NL80211_ATTR_TSID] = { .type = NLA_U8 },
397 [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
398 [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 [NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
409 .len = VHT_MUMIMO_GROUPS_DATA_LEN
410 },
411 [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
412 };
413
414 /* policy for the key attributes */
415 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
416 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
417 [NL80211_KEY_IDX] = { .type = NLA_U8 },
418 [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
419 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
420 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
421 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
422 [NL80211_KEY_TYPE] = { .type = NLA_U32 },
423 [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
424 };
425
426 /* policy for the key default flags */
427 static const struct nla_policy
428 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
429 [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
430 [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
431 };
432
433 /* policy for WoWLAN attributes */
434 static const struct nla_policy
435 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
436 [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
437 [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
438 [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
439 [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
440 [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
441 [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
442 [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
443 [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 static const struct nla_policy
449 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
450 [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
451 [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
452 [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
453 [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
454 [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
455 [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
456 [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
457 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
458 },
459 [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
460 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
461 },
462 [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
463 [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
464 [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
465 };
466
467 /* policy for coalesce rule attributes */
468 static const struct nla_policy
469 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
470 [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
471 [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
472 [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
473 };
474
475 /* policy for GTK rekey offload attributes */
476 static const struct nla_policy
477 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
478 [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
479 [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
480 [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
481 };
482
483 static const struct nla_policy
484 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 static const struct nla_policy
491 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
492 [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
493 [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
494 };
495
496 static const struct nla_policy
497 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
498 [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
499 [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
500 [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
501 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
502 },
503 };
504
505 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
506 struct netlink_callback *cb,
507 struct cfg80211_registered_device **rdev,
508 struct wireless_dev **wdev)
509 {
510 int err;
511
512 rtnl_lock();
513
514 if (!cb->args[0]) {
515 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
516 nl80211_fam.attrbuf, nl80211_fam.maxattr,
517 nl80211_policy);
518 if (err)
519 goto out_unlock;
520
521 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
522 nl80211_fam.attrbuf);
523 if (IS_ERR(*wdev)) {
524 err = PTR_ERR(*wdev);
525 goto out_unlock;
526 }
527 *rdev = wiphy_to_rdev((*wdev)->wiphy);
528 /* 0 is the first index - add 1 to parse only once */
529 cb->args[0] = (*rdev)->wiphy_idx + 1;
530 cb->args[1] = (*wdev)->identifier;
531 } else {
532 /* subtract the 1 again here */
533 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
534 struct wireless_dev *tmp;
535
536 if (!wiphy) {
537 err = -ENODEV;
538 goto out_unlock;
539 }
540 *rdev = wiphy_to_rdev(wiphy);
541 *wdev = NULL;
542
543 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
544 if (tmp->identifier == cb->args[1]) {
545 *wdev = tmp;
546 break;
547 }
548 }
549
550 if (!*wdev) {
551 err = -ENODEV;
552 goto out_unlock;
553 }
554 }
555
556 return 0;
557 out_unlock:
558 rtnl_unlock();
559 return err;
560 }
561
562 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
563 {
564 rtnl_unlock();
565 }
566
567 /* IE validation */
568 static bool is_valid_ie_attr(const struct nlattr *attr)
569 {
570 const u8 *pos;
571 int len;
572
573 if (!attr)
574 return true;
575
576 pos = nla_data(attr);
577 len = nla_len(attr);
578
579 while (len) {
580 u8 elemlen;
581
582 if (len < 2)
583 return false;
584 len -= 2;
585
586 elemlen = pos[1];
587 if (elemlen > len)
588 return false;
589
590 len -= elemlen;
591 pos += 2 + elemlen;
592 }
593
594 return true;
595 }
596
597 /* message building helper */
598 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
599 int flags, u8 cmd)
600 {
601 /* 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 struct ieee80211_channel *chan,
607 bool large)
608 {
609 /* Some channels must be completely excluded from the
610 * list to protect old user-space tools from breaking
611 */
612 if (!large && chan->flags &
613 (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
614 return 0;
615
616 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
617 chan->center_freq))
618 goto nla_put_failure;
619
620 if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
621 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
622 goto nla_put_failure;
623 if (chan->flags & IEEE80211_CHAN_NO_IR) {
624 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
625 goto nla_put_failure;
626 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
627 goto nla_put_failure;
628 }
629 if (chan->flags & IEEE80211_CHAN_RADAR) {
630 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
631 goto nla_put_failure;
632 if (large) {
633 u32 time;
634
635 time = elapsed_jiffies_msecs(chan->dfs_state_entered);
636
637 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
638 chan->dfs_state))
639 goto nla_put_failure;
640 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
641 time))
642 goto nla_put_failure;
643 if (nla_put_u32(msg,
644 NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
645 chan->dfs_cac_ms))
646 goto nla_put_failure;
647 }
648 }
649
650 if (large) {
651 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
652 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
653 goto nla_put_failure;
654 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
655 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
656 goto nla_put_failure;
657 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
658 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
659 goto nla_put_failure;
660 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
661 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
662 goto nla_put_failure;
663 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
664 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
665 goto nla_put_failure;
666 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
667 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
668 goto nla_put_failure;
669 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
670 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
671 goto nla_put_failure;
672 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
673 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
674 goto nla_put_failure;
675 }
676
677 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
678 DBM_TO_MBM(chan->max_power)))
679 goto nla_put_failure;
680
681 return 0;
682
683 nla_put_failure:
684 return -ENOBUFS;
685 }
686
687 /* netlink command implementations */
688
689 struct key_parse {
690 struct key_params p;
691 int idx;
692 int type;
693 bool def, defmgmt;
694 bool def_uni, def_multi;
695 };
696
697 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
698 {
699 struct nlattr *tb[NL80211_KEY_MAX + 1];
700 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
701 nl80211_key_policy);
702 if (err)
703 return err;
704
705 k->def = !!tb[NL80211_KEY_DEFAULT];
706 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
707
708 if (k->def) {
709 k->def_uni = true;
710 k->def_multi = true;
711 }
712 if (k->defmgmt)
713 k->def_multi = true;
714
715 if (tb[NL80211_KEY_IDX])
716 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
717
718 if (tb[NL80211_KEY_DATA]) {
719 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
720 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
721 }
722
723 if (tb[NL80211_KEY_SEQ]) {
724 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
725 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
726 }
727
728 if (tb[NL80211_KEY_CIPHER])
729 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
730
731 if (tb[NL80211_KEY_TYPE]) {
732 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
733 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
734 return -EINVAL;
735 }
736
737 if (tb[NL80211_KEY_DEFAULT_TYPES]) {
738 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
739
740 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
741 tb[NL80211_KEY_DEFAULT_TYPES],
742 nl80211_key_default_policy);
743 if (err)
744 return err;
745
746 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
747 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
748 }
749
750 return 0;
751 }
752
753 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
754 {
755 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
756 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
757 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
758 }
759
760 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
761 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
762 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
763 }
764
765 if (info->attrs[NL80211_ATTR_KEY_IDX])
766 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
767
768 if (info->attrs[NL80211_ATTR_KEY_CIPHER])
769 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
770
771 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
772 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
773
774 if (k->def) {
775 k->def_uni = true;
776 k->def_multi = true;
777 }
778 if (k->defmgmt)
779 k->def_multi = true;
780
781 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
782 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
783 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
784 return -EINVAL;
785 }
786
787 if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
788 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
789 int err = nla_parse_nested(
790 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
791 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
792 nl80211_key_default_policy);
793 if (err)
794 return err;
795
796 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
797 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
798 }
799
800 return 0;
801 }
802
803 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
804 {
805 int err;
806
807 memset(k, 0, sizeof(*k));
808 k->idx = -1;
809 k->type = -1;
810
811 if (info->attrs[NL80211_ATTR_KEY])
812 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
813 else
814 err = nl80211_parse_key_old(info, k);
815
816 if (err)
817 return err;
818
819 if (k->def && k->defmgmt)
820 return -EINVAL;
821
822 if (k->defmgmt) {
823 if (k->def_uni || !k->def_multi)
824 return -EINVAL;
825 }
826
827 if (k->idx != -1) {
828 if (k->defmgmt) {
829 if (k->idx < 4 || k->idx > 5)
830 return -EINVAL;
831 } else if (k->def) {
832 if (k->idx < 0 || k->idx > 3)
833 return -EINVAL;
834 } else {
835 if (k->idx < 0 || k->idx > 5)
836 return -EINVAL;
837 }
838 }
839
840 return 0;
841 }
842
843 static struct cfg80211_cached_keys *
844 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
845 struct nlattr *keys, bool *no_ht)
846 {
847 struct key_parse parse;
848 struct nlattr *key;
849 struct cfg80211_cached_keys *result;
850 int rem, err, def = 0;
851
852 result = kzalloc(sizeof(*result), GFP_KERNEL);
853 if (!result)
854 return ERR_PTR(-ENOMEM);
855
856 result->def = -1;
857 result->defmgmt = -1;
858
859 nla_for_each_nested(key, keys, rem) {
860 memset(&parse, 0, sizeof(parse));
861 parse.idx = -1;
862
863 err = nl80211_parse_key_new(key, &parse);
864 if (err)
865 goto error;
866 err = -EINVAL;
867 if (!parse.p.key)
868 goto error;
869 if (parse.idx < 0 || parse.idx > 4)
870 goto error;
871 if (parse.def) {
872 if (def)
873 goto error;
874 def = 1;
875 result->def = parse.idx;
876 if (!parse.def_uni || !parse.def_multi)
877 goto error;
878 } else if (parse.defmgmt)
879 goto error;
880 err = cfg80211_validate_key_settings(rdev, &parse.p,
881 parse.idx, false, NULL);
882 if (err)
883 goto error;
884 result->params[parse.idx].cipher = parse.p.cipher;
885 result->params[parse.idx].key_len = parse.p.key_len;
886 result->params[parse.idx].key = result->data[parse.idx];
887 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
888
889 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
890 parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
891 if (no_ht)
892 *no_ht = true;
893 }
894 }
895
896 return result;
897 error:
898 kfree(result);
899 return ERR_PTR(err);
900 }
901
902 static int nl80211_key_allowed(struct wireless_dev *wdev)
903 {
904 ASSERT_WDEV_LOCK(wdev);
905
906 switch (wdev->iftype) {
907 case NL80211_IFTYPE_AP:
908 case NL80211_IFTYPE_AP_VLAN:
909 case NL80211_IFTYPE_P2P_GO:
910 case NL80211_IFTYPE_MESH_POINT:
911 break;
912 case NL80211_IFTYPE_ADHOC:
913 case NL80211_IFTYPE_STATION:
914 case NL80211_IFTYPE_P2P_CLIENT:
915 if (!wdev->current_bss)
916 return -ENOLINK;
917 break;
918 case NL80211_IFTYPE_UNSPECIFIED:
919 case NL80211_IFTYPE_OCB:
920 case NL80211_IFTYPE_MONITOR:
921 case NL80211_IFTYPE_P2P_DEVICE:
922 case NL80211_IFTYPE_WDS:
923 case NUM_NL80211_IFTYPES:
924 return -EINVAL;
925 }
926
927 return 0;
928 }
929
930 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
931 struct nlattr *tb)
932 {
933 struct ieee80211_channel *chan;
934
935 if (tb == NULL)
936 return NULL;
937 chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
938 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
939 return NULL;
940 return chan;
941 }
942
943 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
944 {
945 struct nlattr *nl_modes = nla_nest_start(msg, attr);
946 int i;
947
948 if (!nl_modes)
949 goto nla_put_failure;
950
951 i = 0;
952 while (ifmodes) {
953 if ((ifmodes & 1) && nla_put_flag(msg, i))
954 goto nla_put_failure;
955 ifmodes >>= 1;
956 i++;
957 }
958
959 nla_nest_end(msg, nl_modes);
960 return 0;
961
962 nla_put_failure:
963 return -ENOBUFS;
964 }
965
966 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
967 struct sk_buff *msg,
968 bool large)
969 {
970 struct nlattr *nl_combis;
971 int i, j;
972
973 nl_combis = nla_nest_start(msg,
974 NL80211_ATTR_INTERFACE_COMBINATIONS);
975 if (!nl_combis)
976 goto nla_put_failure;
977
978 for (i = 0; i < wiphy->n_iface_combinations; i++) {
979 const struct ieee80211_iface_combination *c;
980 struct nlattr *nl_combi, *nl_limits;
981
982 c = &wiphy->iface_combinations[i];
983
984 nl_combi = nla_nest_start(msg, i + 1);
985 if (!nl_combi)
986 goto nla_put_failure;
987
988 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
989 if (!nl_limits)
990 goto nla_put_failure;
991
992 for (j = 0; j < c->n_limits; j++) {
993 struct nlattr *nl_limit;
994
995 nl_limit = nla_nest_start(msg, j + 1);
996 if (!nl_limit)
997 goto nla_put_failure;
998 if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
999 c->limits[j].max))
1000 goto nla_put_failure;
1001 if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1002 c->limits[j].types))
1003 goto nla_put_failure;
1004 nla_nest_end(msg, nl_limit);
1005 }
1006
1007 nla_nest_end(msg, nl_limits);
1008
1009 if (c->beacon_int_infra_match &&
1010 nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1011 goto nla_put_failure;
1012 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1013 c->num_different_channels) ||
1014 nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1015 c->max_interfaces))
1016 goto nla_put_failure;
1017 if (large &&
1018 (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1019 c->radar_detect_widths) ||
1020 nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1021 c->radar_detect_regions)))
1022 goto nla_put_failure;
1023
1024 nla_nest_end(msg, nl_combi);
1025 }
1026
1027 nla_nest_end(msg, nl_combis);
1028
1029 return 0;
1030 nla_put_failure:
1031 return -ENOBUFS;
1032 }
1033
1034 #ifdef CONFIG_PM
1035 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1036 struct sk_buff *msg)
1037 {
1038 const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1039 struct nlattr *nl_tcp;
1040
1041 if (!tcp)
1042 return 0;
1043
1044 nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1045 if (!nl_tcp)
1046 return -ENOBUFS;
1047
1048 if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1049 tcp->data_payload_max))
1050 return -ENOBUFS;
1051
1052 if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1053 tcp->data_payload_max))
1054 return -ENOBUFS;
1055
1056 if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1057 return -ENOBUFS;
1058
1059 if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1060 sizeof(*tcp->tok), tcp->tok))
1061 return -ENOBUFS;
1062
1063 if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1064 tcp->data_interval_max))
1065 return -ENOBUFS;
1066
1067 if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1068 tcp->wake_payload_max))
1069 return -ENOBUFS;
1070
1071 nla_nest_end(msg, nl_tcp);
1072 return 0;
1073 }
1074
1075 static int nl80211_send_wowlan(struct sk_buff *msg,
1076 struct cfg80211_registered_device *rdev,
1077 bool large)
1078 {
1079 struct nlattr *nl_wowlan;
1080
1081 if (!rdev->wiphy.wowlan)
1082 return 0;
1083
1084 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1085 if (!nl_wowlan)
1086 return -ENOBUFS;
1087
1088 if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1089 nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1090 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1091 nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1092 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1093 nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1094 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1095 nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1096 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1097 nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1098 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1099 nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1100 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1101 nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1102 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1103 nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1104 return -ENOBUFS;
1105
1106 if (rdev->wiphy.wowlan->n_patterns) {
1107 struct nl80211_pattern_support pat = {
1108 .max_patterns = rdev->wiphy.wowlan->n_patterns,
1109 .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1110 .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1111 .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1112 };
1113
1114 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1115 sizeof(pat), &pat))
1116 return -ENOBUFS;
1117 }
1118
1119 if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1120 nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1121 rdev->wiphy.wowlan->max_nd_match_sets))
1122 return -ENOBUFS;
1123
1124 if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1125 return -ENOBUFS;
1126
1127 nla_nest_end(msg, nl_wowlan);
1128
1129 return 0;
1130 }
1131 #endif
1132
1133 static int nl80211_send_coalesce(struct sk_buff *msg,
1134 struct cfg80211_registered_device *rdev)
1135 {
1136 struct nl80211_coalesce_rule_support rule;
1137
1138 if (!rdev->wiphy.coalesce)
1139 return 0;
1140
1141 rule.max_rules = rdev->wiphy.coalesce->n_rules;
1142 rule.max_delay = rdev->wiphy.coalesce->max_delay;
1143 rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1144 rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1145 rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1146 rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1147
1148 if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1149 return -ENOBUFS;
1150
1151 return 0;
1152 }
1153
1154 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1155 struct ieee80211_supported_band *sband)
1156 {
1157 struct nlattr *nl_rates, *nl_rate;
1158 struct ieee80211_rate *rate;
1159 int i;
1160
1161 /* add HT info */
1162 if (sband->ht_cap.ht_supported &&
1163 (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1164 sizeof(sband->ht_cap.mcs),
1165 &sband->ht_cap.mcs) ||
1166 nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1167 sband->ht_cap.cap) ||
1168 nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1169 sband->ht_cap.ampdu_factor) ||
1170 nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1171 sband->ht_cap.ampdu_density)))
1172 return -ENOBUFS;
1173
1174 /* add VHT info */
1175 if (sband->vht_cap.vht_supported &&
1176 (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1177 sizeof(sband->vht_cap.vht_mcs),
1178 &sband->vht_cap.vht_mcs) ||
1179 nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1180 sband->vht_cap.cap)))
1181 return -ENOBUFS;
1182
1183 /* add bitrates */
1184 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1185 if (!nl_rates)
1186 return -ENOBUFS;
1187
1188 for (i = 0; i < sband->n_bitrates; i++) {
1189 nl_rate = nla_nest_start(msg, i);
1190 if (!nl_rate)
1191 return -ENOBUFS;
1192
1193 rate = &sband->bitrates[i];
1194 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1195 rate->bitrate))
1196 return -ENOBUFS;
1197 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1198 nla_put_flag(msg,
1199 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1200 return -ENOBUFS;
1201
1202 nla_nest_end(msg, nl_rate);
1203 }
1204
1205 nla_nest_end(msg, nl_rates);
1206
1207 return 0;
1208 }
1209
1210 static int
1211 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1212 const struct ieee80211_txrx_stypes *mgmt_stypes)
1213 {
1214 u16 stypes;
1215 struct nlattr *nl_ftypes, *nl_ifs;
1216 enum nl80211_iftype ift;
1217 int i;
1218
1219 if (!mgmt_stypes)
1220 return 0;
1221
1222 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1223 if (!nl_ifs)
1224 return -ENOBUFS;
1225
1226 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1227 nl_ftypes = nla_nest_start(msg, ift);
1228 if (!nl_ftypes)
1229 return -ENOBUFS;
1230 i = 0;
1231 stypes = mgmt_stypes[ift].tx;
1232 while (stypes) {
1233 if ((stypes & 1) &&
1234 nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1235 (i << 4) | IEEE80211_FTYPE_MGMT))
1236 return -ENOBUFS;
1237 stypes >>= 1;
1238 i++;
1239 }
1240 nla_nest_end(msg, nl_ftypes);
1241 }
1242
1243 nla_nest_end(msg, nl_ifs);
1244
1245 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1246 if (!nl_ifs)
1247 return -ENOBUFS;
1248
1249 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1250 nl_ftypes = nla_nest_start(msg, ift);
1251 if (!nl_ftypes)
1252 return -ENOBUFS;
1253 i = 0;
1254 stypes = mgmt_stypes[ift].rx;
1255 while (stypes) {
1256 if ((stypes & 1) &&
1257 nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1258 (i << 4) | IEEE80211_FTYPE_MGMT))
1259 return -ENOBUFS;
1260 stypes >>= 1;
1261 i++;
1262 }
1263 nla_nest_end(msg, nl_ftypes);
1264 }
1265 nla_nest_end(msg, nl_ifs);
1266
1267 return 0;
1268 }
1269
1270 struct nl80211_dump_wiphy_state {
1271 s64 filter_wiphy;
1272 long start;
1273 long split_start, band_start, chan_start, capa_start;
1274 bool split;
1275 };
1276
1277 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1278 enum nl80211_commands cmd,
1279 struct sk_buff *msg, u32 portid, u32 seq,
1280 int flags, struct nl80211_dump_wiphy_state *state)
1281 {
1282 void *hdr;
1283 struct nlattr *nl_bands, *nl_band;
1284 struct nlattr *nl_freqs, *nl_freq;
1285 struct nlattr *nl_cmds;
1286 enum nl80211_band band;
1287 struct ieee80211_channel *chan;
1288 int i;
1289 const struct ieee80211_txrx_stypes *mgmt_stypes =
1290 rdev->wiphy.mgmt_stypes;
1291 u32 features;
1292
1293 hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1294 if (!hdr)
1295 return -ENOBUFS;
1296
1297 if (WARN_ON(!state))
1298 return -EINVAL;
1299
1300 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1301 nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1302 wiphy_name(&rdev->wiphy)) ||
1303 nla_put_u32(msg, NL80211_ATTR_GENERATION,
1304 cfg80211_rdev_list_generation))
1305 goto nla_put_failure;
1306
1307 if (cmd != NL80211_CMD_NEW_WIPHY)
1308 goto finish;
1309
1310 switch (state->split_start) {
1311 case 0:
1312 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1313 rdev->wiphy.retry_short) ||
1314 nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1315 rdev->wiphy.retry_long) ||
1316 nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1317 rdev->wiphy.frag_threshold) ||
1318 nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1319 rdev->wiphy.rts_threshold) ||
1320 nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1321 rdev->wiphy.coverage_class) ||
1322 nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1323 rdev->wiphy.max_scan_ssids) ||
1324 nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1325 rdev->wiphy.max_sched_scan_ssids) ||
1326 nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1327 rdev->wiphy.max_scan_ie_len) ||
1328 nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1329 rdev->wiphy.max_sched_scan_ie_len) ||
1330 nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1331 rdev->wiphy.max_match_sets) ||
1332 nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1333 rdev->wiphy.max_sched_scan_plans) ||
1334 nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1335 rdev->wiphy.max_sched_scan_plan_interval) ||
1336 nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1337 rdev->wiphy.max_sched_scan_plan_iterations))
1338 goto nla_put_failure;
1339
1340 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1341 nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1342 goto nla_put_failure;
1343 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1344 nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1345 goto nla_put_failure;
1346 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1347 nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1348 goto nla_put_failure;
1349 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1350 nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1351 goto nla_put_failure;
1352 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1353 nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1354 goto nla_put_failure;
1355 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1356 nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1357 goto nla_put_failure;
1358 state->split_start++;
1359 if (state->split)
1360 break;
1361 case 1:
1362 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1363 sizeof(u32) * rdev->wiphy.n_cipher_suites,
1364 rdev->wiphy.cipher_suites))
1365 goto nla_put_failure;
1366
1367 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1368 rdev->wiphy.max_num_pmkids))
1369 goto nla_put_failure;
1370
1371 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1372 nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1373 goto nla_put_failure;
1374
1375 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1376 rdev->wiphy.available_antennas_tx) ||
1377 nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1378 rdev->wiphy.available_antennas_rx))
1379 goto nla_put_failure;
1380
1381 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1382 nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1383 rdev->wiphy.probe_resp_offload))
1384 goto nla_put_failure;
1385
1386 if ((rdev->wiphy.available_antennas_tx ||
1387 rdev->wiphy.available_antennas_rx) &&
1388 rdev->ops->get_antenna) {
1389 u32 tx_ant = 0, rx_ant = 0;
1390 int res;
1391
1392 res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1393 if (!res) {
1394 if (nla_put_u32(msg,
1395 NL80211_ATTR_WIPHY_ANTENNA_TX,
1396 tx_ant) ||
1397 nla_put_u32(msg,
1398 NL80211_ATTR_WIPHY_ANTENNA_RX,
1399 rx_ant))
1400 goto nla_put_failure;
1401 }
1402 }
1403
1404 state->split_start++;
1405 if (state->split)
1406 break;
1407 case 2:
1408 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1409 rdev->wiphy.interface_modes))
1410 goto nla_put_failure;
1411 state->split_start++;
1412 if (state->split)
1413 break;
1414 case 3:
1415 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1416 if (!nl_bands)
1417 goto nla_put_failure;
1418
1419 for (band = state->band_start;
1420 band < NUM_NL80211_BANDS; band++) {
1421 struct ieee80211_supported_band *sband;
1422
1423 sband = rdev->wiphy.bands[band];
1424
1425 if (!sband)
1426 continue;
1427
1428 nl_band = nla_nest_start(msg, band);
1429 if (!nl_band)
1430 goto nla_put_failure;
1431
1432 switch (state->chan_start) {
1433 case 0:
1434 if (nl80211_send_band_rateinfo(msg, sband))
1435 goto nla_put_failure;
1436 state->chan_start++;
1437 if (state->split)
1438 break;
1439 default:
1440 /* add frequencies */
1441 nl_freqs = nla_nest_start(
1442 msg, NL80211_BAND_ATTR_FREQS);
1443 if (!nl_freqs)
1444 goto nla_put_failure;
1445
1446 for (i = state->chan_start - 1;
1447 i < sband->n_channels;
1448 i++) {
1449 nl_freq = nla_nest_start(msg, i);
1450 if (!nl_freq)
1451 goto nla_put_failure;
1452
1453 chan = &sband->channels[i];
1454
1455 if (nl80211_msg_put_channel(
1456 msg, chan,
1457 state->split))
1458 goto nla_put_failure;
1459
1460 nla_nest_end(msg, nl_freq);
1461 if (state->split)
1462 break;
1463 }
1464 if (i < sband->n_channels)
1465 state->chan_start = i + 2;
1466 else
1467 state->chan_start = 0;
1468 nla_nest_end(msg, nl_freqs);
1469 }
1470
1471 nla_nest_end(msg, nl_band);
1472
1473 if (state->split) {
1474 /* start again here */
1475 if (state->chan_start)
1476 band--;
1477 break;
1478 }
1479 }
1480 nla_nest_end(msg, nl_bands);
1481
1482 if (band < NUM_NL80211_BANDS)
1483 state->band_start = band + 1;
1484 else
1485 state->band_start = 0;
1486
1487 /* if bands & channels are done, continue outside */
1488 if (state->band_start == 0 && state->chan_start == 0)
1489 state->split_start++;
1490 if (state->split)
1491 break;
1492 case 4:
1493 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1494 if (!nl_cmds)
1495 goto nla_put_failure;
1496
1497 i = 0;
1498 #define CMD(op, n) \
1499 do { \
1500 if (rdev->ops->op) { \
1501 i++; \
1502 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1503 goto nla_put_failure; \
1504 } \
1505 } while (0)
1506
1507 CMD(add_virtual_intf, NEW_INTERFACE);
1508 CMD(change_virtual_intf, SET_INTERFACE);
1509 CMD(add_key, NEW_KEY);
1510 CMD(start_ap, START_AP);
1511 CMD(add_station, NEW_STATION);
1512 CMD(add_mpath, NEW_MPATH);
1513 CMD(update_mesh_config, SET_MESH_CONFIG);
1514 CMD(change_bss, SET_BSS);
1515 CMD(auth, AUTHENTICATE);
1516 CMD(assoc, ASSOCIATE);
1517 CMD(deauth, DEAUTHENTICATE);
1518 CMD(disassoc, DISASSOCIATE);
1519 CMD(join_ibss, JOIN_IBSS);
1520 CMD(join_mesh, JOIN_MESH);
1521 CMD(set_pmksa, SET_PMKSA);
1522 CMD(del_pmksa, DEL_PMKSA);
1523 CMD(flush_pmksa, FLUSH_PMKSA);
1524 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1525 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1526 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1527 CMD(mgmt_tx, FRAME);
1528 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1529 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1530 i++;
1531 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1532 goto nla_put_failure;
1533 }
1534 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1535 rdev->ops->join_mesh) {
1536 i++;
1537 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1538 goto nla_put_failure;
1539 }
1540 CMD(set_wds_peer, SET_WDS_PEER);
1541 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1542 CMD(tdls_mgmt, TDLS_MGMT);
1543 CMD(tdls_oper, TDLS_OPER);
1544 }
1545 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1546 CMD(sched_scan_start, START_SCHED_SCAN);
1547 CMD(probe_client, PROBE_CLIENT);
1548 CMD(set_noack_map, SET_NOACK_MAP);
1549 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1550 i++;
1551 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1552 goto nla_put_failure;
1553 }
1554 CMD(start_p2p_device, START_P2P_DEVICE);
1555 CMD(set_mcast_rate, SET_MCAST_RATE);
1556 #ifdef CONFIG_NL80211_TESTMODE
1557 CMD(testmode_cmd, TESTMODE);
1558 #endif
1559 if (state->split) {
1560 CMD(crit_proto_start, CRIT_PROTOCOL_START);
1561 CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1562 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1563 CMD(channel_switch, CHANNEL_SWITCH);
1564 CMD(set_qos_map, SET_QOS_MAP);
1565 if (rdev->wiphy.features &
1566 NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1567 CMD(add_tx_ts, ADD_TX_TS);
1568 }
1569 /* add into the if now */
1570 #undef CMD
1571
1572 if (rdev->ops->connect || rdev->ops->auth) {
1573 i++;
1574 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1575 goto nla_put_failure;
1576 }
1577
1578 if (rdev->ops->disconnect || rdev->ops->deauth) {
1579 i++;
1580 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1581 goto nla_put_failure;
1582 }
1583
1584 nla_nest_end(msg, nl_cmds);
1585 state->split_start++;
1586 if (state->split)
1587 break;
1588 case 5:
1589 if (rdev->ops->remain_on_channel &&
1590 (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1591 nla_put_u32(msg,
1592 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1593 rdev->wiphy.max_remain_on_channel_duration))
1594 goto nla_put_failure;
1595
1596 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1597 nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1598 goto nla_put_failure;
1599
1600 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1601 goto nla_put_failure;
1602 state->split_start++;
1603 if (state->split)
1604 break;
1605 case 6:
1606 #ifdef CONFIG_PM
1607 if (nl80211_send_wowlan(msg, rdev, state->split))
1608 goto nla_put_failure;
1609 state->split_start++;
1610 if (state->split)
1611 break;
1612 #else
1613 state->split_start++;
1614 #endif
1615 case 7:
1616 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1617 rdev->wiphy.software_iftypes))
1618 goto nla_put_failure;
1619
1620 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1621 state->split))
1622 goto nla_put_failure;
1623
1624 state->split_start++;
1625 if (state->split)
1626 break;
1627 case 8:
1628 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1629 nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1630 rdev->wiphy.ap_sme_capa))
1631 goto nla_put_failure;
1632
1633 features = rdev->wiphy.features;
1634 /*
1635 * We can only add the per-channel limit information if the
1636 * dump is split, otherwise it makes it too big. Therefore
1637 * only advertise it in that case.
1638 */
1639 if (state->split)
1640 features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1641 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1642 goto nla_put_failure;
1643
1644 if (rdev->wiphy.ht_capa_mod_mask &&
1645 nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1646 sizeof(*rdev->wiphy.ht_capa_mod_mask),
1647 rdev->wiphy.ht_capa_mod_mask))
1648 goto nla_put_failure;
1649
1650 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1651 rdev->wiphy.max_acl_mac_addrs &&
1652 nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1653 rdev->wiphy.max_acl_mac_addrs))
1654 goto nla_put_failure;
1655
1656 /*
1657 * Any information below this point is only available to
1658 * applications that can deal with it being split. This
1659 * helps ensure that newly added capabilities don't break
1660 * older tools by overrunning their buffers.
1661 *
1662 * We still increment split_start so that in the split
1663 * case we'll continue with more data in the next round,
1664 * but break unconditionally so unsplit data stops here.
1665 */
1666 state->split_start++;
1667 break;
1668 case 9:
1669 if (rdev->wiphy.extended_capabilities &&
1670 (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1671 rdev->wiphy.extended_capabilities_len,
1672 rdev->wiphy.extended_capabilities) ||
1673 nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1674 rdev->wiphy.extended_capabilities_len,
1675 rdev->wiphy.extended_capabilities_mask)))
1676 goto nla_put_failure;
1677
1678 if (rdev->wiphy.vht_capa_mod_mask &&
1679 nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1680 sizeof(*rdev->wiphy.vht_capa_mod_mask),
1681 rdev->wiphy.vht_capa_mod_mask))
1682 goto nla_put_failure;
1683
1684 state->split_start++;
1685 break;
1686 case 10:
1687 if (nl80211_send_coalesce(msg, rdev))
1688 goto nla_put_failure;
1689
1690 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1691 (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1692 nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1693 goto nla_put_failure;
1694
1695 if (rdev->wiphy.max_ap_assoc_sta &&
1696 nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1697 rdev->wiphy.max_ap_assoc_sta))
1698 goto nla_put_failure;
1699
1700 state->split_start++;
1701 break;
1702 case 11:
1703 if (rdev->wiphy.n_vendor_commands) {
1704 const struct nl80211_vendor_cmd_info *info;
1705 struct nlattr *nested;
1706
1707 nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1708 if (!nested)
1709 goto nla_put_failure;
1710
1711 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1712 info = &rdev->wiphy.vendor_commands[i].info;
1713 if (nla_put(msg, i + 1, sizeof(*info), info))
1714 goto nla_put_failure;
1715 }
1716 nla_nest_end(msg, nested);
1717 }
1718
1719 if (rdev->wiphy.n_vendor_events) {
1720 const struct nl80211_vendor_cmd_info *info;
1721 struct nlattr *nested;
1722
1723 nested = nla_nest_start(msg,
1724 NL80211_ATTR_VENDOR_EVENTS);
1725 if (!nested)
1726 goto nla_put_failure;
1727
1728 for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1729 info = &rdev->wiphy.vendor_events[i];
1730 if (nla_put(msg, i + 1, sizeof(*info), info))
1731 goto nla_put_failure;
1732 }
1733 nla_nest_end(msg, nested);
1734 }
1735 state->split_start++;
1736 break;
1737 case 12:
1738 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1739 nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1740 rdev->wiphy.max_num_csa_counters))
1741 goto nla_put_failure;
1742
1743 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1744 nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1745 goto nla_put_failure;
1746
1747 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1748 sizeof(rdev->wiphy.ext_features),
1749 rdev->wiphy.ext_features))
1750 goto nla_put_failure;
1751
1752 if (rdev->wiphy.bss_select_support) {
1753 struct nlattr *nested;
1754 u32 bss_select_support = rdev->wiphy.bss_select_support;
1755
1756 nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1757 if (!nested)
1758 goto nla_put_failure;
1759
1760 i = 0;
1761 while (bss_select_support) {
1762 if ((bss_select_support & 1) &&
1763 nla_put_flag(msg, i))
1764 goto nla_put_failure;
1765 i++;
1766 bss_select_support >>= 1;
1767 }
1768 nla_nest_end(msg, nested);
1769 }
1770
1771 state->split_start++;
1772 break;
1773 case 13:
1774 if (rdev->wiphy.num_iftype_ext_capab &&
1775 rdev->wiphy.iftype_ext_capab) {
1776 struct nlattr *nested_ext_capab, *nested;
1777
1778 nested = nla_nest_start(msg,
1779 NL80211_ATTR_IFTYPE_EXT_CAPA);
1780 if (!nested)
1781 goto nla_put_failure;
1782
1783 for (i = state->capa_start;
1784 i < rdev->wiphy.num_iftype_ext_capab; i++) {
1785 const struct wiphy_iftype_ext_capab *capab;
1786
1787 capab = &rdev->wiphy.iftype_ext_capab[i];
1788
1789 nested_ext_capab = nla_nest_start(msg, i);
1790 if (!nested_ext_capab ||
1791 nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1792 capab->iftype) ||
1793 nla_put(msg, NL80211_ATTR_EXT_CAPA,
1794 capab->extended_capabilities_len,
1795 capab->extended_capabilities) ||
1796 nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1797 capab->extended_capabilities_len,
1798 capab->extended_capabilities_mask))
1799 goto nla_put_failure;
1800
1801 nla_nest_end(msg, nested_ext_capab);
1802 if (state->split)
1803 break;
1804 }
1805 nla_nest_end(msg, nested);
1806 if (i < rdev->wiphy.num_iftype_ext_capab) {
1807 state->capa_start = i + 1;
1808 break;
1809 }
1810 }
1811
1812 /* done */
1813 state->split_start = 0;
1814 break;
1815 }
1816 finish:
1817 genlmsg_end(msg, hdr);
1818 return 0;
1819
1820 nla_put_failure:
1821 genlmsg_cancel(msg, hdr);
1822 return -EMSGSIZE;
1823 }
1824
1825 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1826 struct netlink_callback *cb,
1827 struct nl80211_dump_wiphy_state *state)
1828 {
1829 struct nlattr **tb = nl80211_fam.attrbuf;
1830 int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1831 tb, nl80211_fam.maxattr, nl80211_policy);
1832 /* ignore parse errors for backward compatibility */
1833 if (ret)
1834 return 0;
1835
1836 state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1837 if (tb[NL80211_ATTR_WIPHY])
1838 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1839 if (tb[NL80211_ATTR_WDEV])
1840 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1841 if (tb[NL80211_ATTR_IFINDEX]) {
1842 struct net_device *netdev;
1843 struct cfg80211_registered_device *rdev;
1844 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1845
1846 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1847 if (!netdev)
1848 return -ENODEV;
1849 if (netdev->ieee80211_ptr) {
1850 rdev = wiphy_to_rdev(
1851 netdev->ieee80211_ptr->wiphy);
1852 state->filter_wiphy = rdev->wiphy_idx;
1853 }
1854 }
1855
1856 return 0;
1857 }
1858
1859 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1860 {
1861 int idx = 0, ret;
1862 struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1863 struct cfg80211_registered_device *rdev;
1864
1865 rtnl_lock();
1866 if (!state) {
1867 state = kzalloc(sizeof(*state), GFP_KERNEL);
1868 if (!state) {
1869 rtnl_unlock();
1870 return -ENOMEM;
1871 }
1872 state->filter_wiphy = -1;
1873 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1874 if (ret) {
1875 kfree(state);
1876 rtnl_unlock();
1877 return ret;
1878 }
1879 cb->args[0] = (long)state;
1880 }
1881
1882 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1883 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1884 continue;
1885 if (++idx <= state->start)
1886 continue;
1887 if (state->filter_wiphy != -1 &&
1888 state->filter_wiphy != rdev->wiphy_idx)
1889 continue;
1890 /* attempt to fit multiple wiphy data chunks into the skb */
1891 do {
1892 ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1893 skb,
1894 NETLINK_CB(cb->skb).portid,
1895 cb->nlh->nlmsg_seq,
1896 NLM_F_MULTI, state);
1897 if (ret < 0) {
1898 /*
1899 * If sending the wiphy data didn't fit (ENOBUFS
1900 * or EMSGSIZE returned), this SKB is still
1901 * empty (so it's not too big because another
1902 * wiphy dataset is already in the skb) and
1903 * we've not tried to adjust the dump allocation
1904 * yet ... then adjust the alloc size to be
1905 * bigger, and return 1 but with the empty skb.
1906 * This results in an empty message being RX'ed
1907 * in userspace, but that is ignored.
1908 *
1909 * We can then retry with the larger buffer.
1910 */
1911 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1912 !skb->len && !state->split &&
1913 cb->min_dump_alloc < 4096) {
1914 cb->min_dump_alloc = 4096;
1915 state->split_start = 0;
1916 rtnl_unlock();
1917 return 1;
1918 }
1919 idx--;
1920 break;
1921 }
1922 } while (state->split_start > 0);
1923 break;
1924 }
1925 rtnl_unlock();
1926
1927 state->start = idx;
1928
1929 return skb->len;
1930 }
1931
1932 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1933 {
1934 kfree((void *)cb->args[0]);
1935 return 0;
1936 }
1937
1938 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1939 {
1940 struct sk_buff *msg;
1941 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1942 struct nl80211_dump_wiphy_state state = {};
1943
1944 msg = nlmsg_new(4096, GFP_KERNEL);
1945 if (!msg)
1946 return -ENOMEM;
1947
1948 if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1949 info->snd_portid, info->snd_seq, 0,
1950 &state) < 0) {
1951 nlmsg_free(msg);
1952 return -ENOBUFS;
1953 }
1954
1955 return genlmsg_reply(msg, info);
1956 }
1957
1958 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1959 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
1960 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
1961 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
1962 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
1963 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
1964 };
1965
1966 static int parse_txq_params(struct nlattr *tb[],
1967 struct ieee80211_txq_params *txq_params)
1968 {
1969 if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1970 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1971 !tb[NL80211_TXQ_ATTR_AIFS])
1972 return -EINVAL;
1973
1974 txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1975 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1976 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1977 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1978 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1979
1980 if (txq_params->ac >= NL80211_NUM_ACS)
1981 return -EINVAL;
1982
1983 return 0;
1984 }
1985
1986 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1987 {
1988 /*
1989 * You can only set the channel explicitly for WDS interfaces,
1990 * all others have their channel managed via their respective
1991 * "establish a connection" command (connect, join, ...)
1992 *
1993 * For AP/GO and mesh mode, the channel can be set with the
1994 * channel userspace API, but is only stored and passed to the
1995 * low-level driver when the AP starts or the mesh is joined.
1996 * This is for backward compatibility, userspace can also give
1997 * the channel in the start-ap or join-mesh commands instead.
1998 *
1999 * Monitors are special as they are normally slaved to
2000 * whatever else is going on, so they have their own special
2001 * operation to set the monitor channel if possible.
2002 */
2003 return !wdev ||
2004 wdev->iftype == NL80211_IFTYPE_AP ||
2005 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2006 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2007 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2008 }
2009
2010 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2011 struct genl_info *info,
2012 struct cfg80211_chan_def *chandef)
2013 {
2014 u32 control_freq;
2015
2016 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2017 return -EINVAL;
2018
2019 control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2020
2021 chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2022 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2023 chandef->center_freq1 = control_freq;
2024 chandef->center_freq2 = 0;
2025
2026 /* Primary channel not allowed */
2027 if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2028 return -EINVAL;
2029
2030 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2031 enum nl80211_channel_type chantype;
2032
2033 chantype = nla_get_u32(
2034 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2035
2036 switch (chantype) {
2037 case NL80211_CHAN_NO_HT:
2038 case NL80211_CHAN_HT20:
2039 case NL80211_CHAN_HT40PLUS:
2040 case NL80211_CHAN_HT40MINUS:
2041 cfg80211_chandef_create(chandef, chandef->chan,
2042 chantype);
2043 break;
2044 default:
2045 return -EINVAL;
2046 }
2047 } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2048 chandef->width =
2049 nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2050 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2051 chandef->center_freq1 =
2052 nla_get_u32(
2053 info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2054 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2055 chandef->center_freq2 =
2056 nla_get_u32(
2057 info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2058 }
2059
2060 if (!cfg80211_chandef_valid(chandef))
2061 return -EINVAL;
2062
2063 if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2064 IEEE80211_CHAN_DISABLED))
2065 return -EINVAL;
2066
2067 if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2068 chandef->width == NL80211_CHAN_WIDTH_10) &&
2069 !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2070 return -EINVAL;
2071
2072 return 0;
2073 }
2074
2075 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2076 struct net_device *dev,
2077 struct genl_info *info)
2078 {
2079 struct cfg80211_chan_def chandef;
2080 int result;
2081 enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2082 struct wireless_dev *wdev = NULL;
2083
2084 if (dev)
2085 wdev = dev->ieee80211_ptr;
2086 if (!nl80211_can_set_dev_channel(wdev))
2087 return -EOPNOTSUPP;
2088 if (wdev)
2089 iftype = wdev->iftype;
2090
2091 result = nl80211_parse_chandef(rdev, info, &chandef);
2092 if (result)
2093 return result;
2094
2095 switch (iftype) {
2096 case NL80211_IFTYPE_AP:
2097 case NL80211_IFTYPE_P2P_GO:
2098 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2099 iftype)) {
2100 result = -EINVAL;
2101 break;
2102 }
2103 if (wdev->beacon_interval) {
2104 if (!dev || !rdev->ops->set_ap_chanwidth ||
2105 !(rdev->wiphy.features &
2106 NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2107 result = -EBUSY;
2108 break;
2109 }
2110
2111 /* Only allow dynamic channel width changes */
2112 if (chandef.chan != wdev->preset_chandef.chan) {
2113 result = -EBUSY;
2114 break;
2115 }
2116 result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2117 if (result)
2118 break;
2119 }
2120 wdev->preset_chandef = chandef;
2121 result = 0;
2122 break;
2123 case NL80211_IFTYPE_MESH_POINT:
2124 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2125 break;
2126 case NL80211_IFTYPE_MONITOR:
2127 result = cfg80211_set_monitor_channel(rdev, &chandef);
2128 break;
2129 default:
2130 result = -EINVAL;
2131 }
2132
2133 return result;
2134 }
2135
2136 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2137 {
2138 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2139 struct net_device *netdev = info->user_ptr[1];
2140
2141 return __nl80211_set_channel(rdev, netdev, info);
2142 }
2143
2144 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2145 {
2146 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2147 struct net_device *dev = info->user_ptr[1];
2148 struct wireless_dev *wdev = dev->ieee80211_ptr;
2149 const u8 *bssid;
2150
2151 if (!info->attrs[NL80211_ATTR_MAC])
2152 return -EINVAL;
2153
2154 if (netif_running(dev))
2155 return -EBUSY;
2156
2157 if (!rdev->ops->set_wds_peer)
2158 return -EOPNOTSUPP;
2159
2160 if (wdev->iftype != NL80211_IFTYPE_WDS)
2161 return -EOPNOTSUPP;
2162
2163 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2164 return rdev_set_wds_peer(rdev, dev, bssid);
2165 }
2166
2167 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2168 {
2169 struct cfg80211_registered_device *rdev;
2170 struct net_device *netdev = NULL;
2171 struct wireless_dev *wdev;
2172 int result = 0, rem_txq_params = 0;
2173 struct nlattr *nl_txq_params;
2174 u32 changed;
2175 u8 retry_short = 0, retry_long = 0;
2176 u32 frag_threshold = 0, rts_threshold = 0;
2177 u8 coverage_class = 0;
2178
2179 ASSERT_RTNL();
2180
2181 /*
2182 * Try to find the wiphy and netdev. Normally this
2183 * function shouldn't need the netdev, but this is
2184 * done for backward compatibility -- previously
2185 * setting the channel was done per wiphy, but now
2186 * it is per netdev. Previous userland like hostapd
2187 * also passed a netdev to set_wiphy, so that it is
2188 * possible to let that go to the right netdev!
2189 */
2190
2191 if (info->attrs[NL80211_ATTR_IFINDEX]) {
2192 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2193
2194 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2195 if (netdev && netdev->ieee80211_ptr)
2196 rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2197 else
2198 netdev = NULL;
2199 }
2200
2201 if (!netdev) {
2202 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2203 info->attrs);
2204 if (IS_ERR(rdev))
2205 return PTR_ERR(rdev);
2206 wdev = NULL;
2207 netdev = NULL;
2208 result = 0;
2209 } else
2210 wdev = netdev->ieee80211_ptr;
2211
2212 /*
2213 * end workaround code, by now the rdev is available
2214 * and locked, and wdev may or may not be NULL.
2215 */
2216
2217 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2218 result = cfg80211_dev_rename(
2219 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2220
2221 if (result)
2222 return result;
2223
2224 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2225 struct ieee80211_txq_params txq_params;
2226 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2227
2228 if (!rdev->ops->set_txq_params)
2229 return -EOPNOTSUPP;
2230
2231 if (!netdev)
2232 return -EINVAL;
2233
2234 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2235 netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2236 return -EINVAL;
2237
2238 if (!netif_running(netdev))
2239 return -ENETDOWN;
2240
2241 nla_for_each_nested(nl_txq_params,
2242 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2243 rem_txq_params) {
2244 result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2245 nla_data(nl_txq_params),
2246 nla_len(nl_txq_params),
2247 txq_params_policy);
2248 if (result)
2249 return result;
2250 result = parse_txq_params(tb, &txq_params);
2251 if (result)
2252 return result;
2253
2254 result = rdev_set_txq_params(rdev, netdev,
2255 &txq_params);
2256 if (result)
2257 return result;
2258 }
2259 }
2260
2261 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2262 result = __nl80211_set_channel(
2263 rdev,
2264 nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2265 info);
2266 if (result)
2267 return result;
2268 }
2269
2270 if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2271 struct wireless_dev *txp_wdev = wdev;
2272 enum nl80211_tx_power_setting type;
2273 int idx, mbm = 0;
2274
2275 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2276 txp_wdev = NULL;
2277
2278 if (!rdev->ops->set_tx_power)
2279 return -EOPNOTSUPP;
2280
2281 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2282 type = nla_get_u32(info->attrs[idx]);
2283
2284 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2285 (type != NL80211_TX_POWER_AUTOMATIC))
2286 return -EINVAL;
2287
2288 if (type != NL80211_TX_POWER_AUTOMATIC) {
2289 idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2290 mbm = nla_get_u32(info->attrs[idx]);
2291 }
2292
2293 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2294 if (result)
2295 return result;
2296 }
2297
2298 if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2299 info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2300 u32 tx_ant, rx_ant;
2301
2302 if ((!rdev->wiphy.available_antennas_tx &&
2303 !rdev->wiphy.available_antennas_rx) ||
2304 !rdev->ops->set_antenna)
2305 return -EOPNOTSUPP;
2306
2307 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2308 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2309
2310 /* reject antenna configurations which don't match the
2311 * available antenna masks, except for the "all" mask */
2312 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2313 (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2314 return -EINVAL;
2315
2316 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2317 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2318
2319 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2320 if (result)
2321 return result;
2322 }
2323
2324 changed = 0;
2325
2326 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2327 retry_short = nla_get_u8(
2328 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2329 if (retry_short == 0)
2330 return -EINVAL;
2331
2332 changed |= WIPHY_PARAM_RETRY_SHORT;
2333 }
2334
2335 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2336 retry_long = nla_get_u8(
2337 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2338 if (retry_long == 0)
2339 return -EINVAL;
2340
2341 changed |= WIPHY_PARAM_RETRY_LONG;
2342 }
2343
2344 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2345 frag_threshold = nla_get_u32(
2346 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2347 if (frag_threshold < 256)
2348 return -EINVAL;
2349
2350 if (frag_threshold != (u32) -1) {
2351 /*
2352 * Fragments (apart from the last one) are required to
2353 * have even length. Make the fragmentation code
2354 * simpler by stripping LSB should someone try to use
2355 * odd threshold value.
2356 */
2357 frag_threshold &= ~0x1;
2358 }
2359 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2360 }
2361
2362 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2363 rts_threshold = nla_get_u32(
2364 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2365 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2366 }
2367
2368 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2369 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2370 return -EINVAL;
2371
2372 coverage_class = nla_get_u8(
2373 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2374 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2375 }
2376
2377 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2378 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2379 return -EOPNOTSUPP;
2380
2381 changed |= WIPHY_PARAM_DYN_ACK;
2382 }
2383
2384 if (changed) {
2385 u8 old_retry_short, old_retry_long;
2386 u32 old_frag_threshold, old_rts_threshold;
2387 u8 old_coverage_class;
2388
2389 if (!rdev->ops->set_wiphy_params)
2390 return -EOPNOTSUPP;
2391
2392 old_retry_short = rdev->wiphy.retry_short;
2393 old_retry_long = rdev->wiphy.retry_long;
2394 old_frag_threshold = rdev->wiphy.frag_threshold;
2395 old_rts_threshold = rdev->wiphy.rts_threshold;
2396 old_coverage_class = rdev->wiphy.coverage_class;
2397
2398 if (changed & WIPHY_PARAM_RETRY_SHORT)
2399 rdev->wiphy.retry_short = retry_short;
2400 if (changed & WIPHY_PARAM_RETRY_LONG)
2401 rdev->wiphy.retry_long = retry_long;
2402 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2403 rdev->wiphy.frag_threshold = frag_threshold;
2404 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2405 rdev->wiphy.rts_threshold = rts_threshold;
2406 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2407 rdev->wiphy.coverage_class = coverage_class;
2408
2409 result = rdev_set_wiphy_params(rdev, changed);
2410 if (result) {
2411 rdev->wiphy.retry_short = old_retry_short;
2412 rdev->wiphy.retry_long = old_retry_long;
2413 rdev->wiphy.frag_threshold = old_frag_threshold;
2414 rdev->wiphy.rts_threshold = old_rts_threshold;
2415 rdev->wiphy.coverage_class = old_coverage_class;
2416 return result;
2417 }
2418 }
2419 return 0;
2420 }
2421
2422 static inline u64 wdev_id(struct wireless_dev *wdev)
2423 {
2424 return (u64)wdev->identifier |
2425 ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2426 }
2427
2428 static int nl80211_send_chandef(struct sk_buff *msg,
2429 const struct cfg80211_chan_def *chandef)
2430 {
2431 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2432 return -EINVAL;
2433
2434 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2435 chandef->chan->center_freq))
2436 return -ENOBUFS;
2437 switch (chandef->width) {
2438 case NL80211_CHAN_WIDTH_20_NOHT:
2439 case NL80211_CHAN_WIDTH_20:
2440 case NL80211_CHAN_WIDTH_40:
2441 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2442 cfg80211_get_chandef_type(chandef)))
2443 return -ENOBUFS;
2444 break;
2445 default:
2446 break;
2447 }
2448 if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2449 return -ENOBUFS;
2450 if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2451 return -ENOBUFS;
2452 if (chandef->center_freq2 &&
2453 nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2454 return -ENOBUFS;
2455 return 0;
2456 }
2457
2458 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2459 struct cfg80211_registered_device *rdev,
2460 struct wireless_dev *wdev, bool removal)
2461 {
2462 struct net_device *dev = wdev->netdev;
2463 u8 cmd = NL80211_CMD_NEW_INTERFACE;
2464 void *hdr;
2465
2466 if (removal)
2467 cmd = NL80211_CMD_DEL_INTERFACE;
2468
2469 hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2470 if (!hdr)
2471 return -1;
2472
2473 if (dev &&
2474 (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2475 nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2476 goto nla_put_failure;
2477
2478 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2479 nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2480 nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2481 NL80211_ATTR_PAD) ||
2482 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2483 nla_put_u32(msg, NL80211_ATTR_GENERATION,
2484 rdev->devlist_generation ^
2485 (cfg80211_rdev_list_generation << 2)))
2486 goto nla_put_failure;
2487
2488 if (rdev->ops->get_channel) {
2489 int ret;
2490 struct cfg80211_chan_def chandef;
2491
2492 ret = rdev_get_channel(rdev, wdev, &chandef);
2493 if (ret == 0) {
2494 if (nl80211_send_chandef(msg, &chandef))
2495 goto nla_put_failure;
2496 }
2497 }
2498
2499 if (rdev->ops->get_tx_power) {
2500 int dbm, ret;
2501
2502 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2503 if (ret == 0 &&
2504 nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2505 DBM_TO_MBM(dbm)))
2506 goto nla_put_failure;
2507 }
2508
2509 if (wdev->ssid_len) {
2510 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2511 goto nla_put_failure;
2512 }
2513
2514 genlmsg_end(msg, hdr);
2515 return 0;
2516
2517 nla_put_failure:
2518 genlmsg_cancel(msg, hdr);
2519 return -EMSGSIZE;
2520 }
2521
2522 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2523 {
2524 int wp_idx = 0;
2525 int if_idx = 0;
2526 int wp_start = cb->args[0];
2527 int if_start = cb->args[1];
2528 struct cfg80211_registered_device *rdev;
2529 struct wireless_dev *wdev;
2530
2531 rtnl_lock();
2532 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2533 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2534 continue;
2535 if (wp_idx < wp_start) {
2536 wp_idx++;
2537 continue;
2538 }
2539 if_idx = 0;
2540
2541 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2542 if (if_idx < if_start) {
2543 if_idx++;
2544 continue;
2545 }
2546 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2547 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2548 rdev, wdev, false) < 0) {
2549 goto out;
2550 }
2551 if_idx++;
2552 }
2553
2554 wp_idx++;
2555 }
2556 out:
2557 rtnl_unlock();
2558
2559 cb->args[0] = wp_idx;
2560 cb->args[1] = if_idx;
2561
2562 return skb->len;
2563 }
2564
2565 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2566 {
2567 struct sk_buff *msg;
2568 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2569 struct wireless_dev *wdev = info->user_ptr[1];
2570
2571 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2572 if (!msg)
2573 return -ENOMEM;
2574
2575 if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2576 rdev, wdev, false) < 0) {
2577 nlmsg_free(msg);
2578 return -ENOBUFS;
2579 }
2580
2581 return genlmsg_reply(msg, info);
2582 }
2583
2584 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2585 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2586 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2587 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2588 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2589 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2590 [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2591 };
2592
2593 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2594 {
2595 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2596 int flag;
2597
2598 *mntrflags = 0;
2599
2600 if (!nla)
2601 return -EINVAL;
2602
2603 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2604 nla, mntr_flags_policy))
2605 return -EINVAL;
2606
2607 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2608 if (flags[flag])
2609 *mntrflags |= (1<<flag);
2610
2611 return 0;
2612 }
2613
2614 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2615 struct net_device *netdev, u8 use_4addr,
2616 enum nl80211_iftype iftype)
2617 {
2618 if (!use_4addr) {
2619 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2620 return -EBUSY;
2621 return 0;
2622 }
2623
2624 switch (iftype) {
2625 case NL80211_IFTYPE_AP_VLAN:
2626 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2627 return 0;
2628 break;
2629 case NL80211_IFTYPE_STATION:
2630 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2631 return 0;
2632 break;
2633 default:
2634 break;
2635 }
2636
2637 return -EOPNOTSUPP;
2638 }
2639
2640 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2641 {
2642 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2643 struct vif_params params;
2644 int err;
2645 enum nl80211_iftype otype, ntype;
2646 struct net_device *dev = info->user_ptr[1];
2647 u32 _flags, *flags = NULL;
2648 bool change = false;
2649
2650 memset(¶ms, 0, sizeof(params));
2651
2652 otype = ntype = dev->ieee80211_ptr->iftype;
2653
2654 if (info->attrs[NL80211_ATTR_IFTYPE]) {
2655 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2656 if (otype != ntype)
2657 change = true;
2658 if (ntype > NL80211_IFTYPE_MAX)
2659 return -EINVAL;
2660 }
2661
2662 if (info->attrs[NL80211_ATTR_MESH_ID]) {
2663 struct wireless_dev *wdev = dev->ieee80211_ptr;
2664
2665 if (ntype != NL80211_IFTYPE_MESH_POINT)
2666 return -EINVAL;
2667 if (netif_running(dev))
2668 return -EBUSY;
2669
2670 wdev_lock(wdev);
2671 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2672 IEEE80211_MAX_MESH_ID_LEN);
2673 wdev->mesh_id_up_len =
2674 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2675 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2676 wdev->mesh_id_up_len);
2677 wdev_unlock(wdev);
2678 }
2679
2680 if (info->attrs[NL80211_ATTR_4ADDR]) {
2681 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2682 change = true;
2683 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2684 if (err)
2685 return err;
2686 } else {
2687 params.use_4addr = -1;
2688 }
2689
2690 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2691 if (ntype != NL80211_IFTYPE_MONITOR)
2692 return -EINVAL;
2693 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2694 &_flags);
2695 if (err)
2696 return err;
2697
2698 flags = &_flags;
2699 change = true;
2700 }
2701
2702 if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2703 const u8 *mumimo_groups;
2704 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2705
2706 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2707 return -EOPNOTSUPP;
2708
2709 mumimo_groups =
2710 nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2711
2712 /* bits 0 and 63 are reserved and must be zero */
2713 if ((mumimo_groups[0] & BIT(7)) ||
2714 (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0)))
2715 return -EINVAL;
2716
2717 memcpy(params.vht_mumimo_groups, mumimo_groups,
2718 VHT_MUMIMO_GROUPS_DATA_LEN);
2719 change = true;
2720 }
2721
2722 if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2723 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2724
2725 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2726 return -EOPNOTSUPP;
2727
2728 nla_memcpy(params.macaddr,
2729 info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR],
2730 ETH_ALEN);
2731 change = true;
2732 }
2733
2734 if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2735 !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2736 return -EOPNOTSUPP;
2737
2738 if (change)
2739 err = cfg80211_change_iface(rdev, dev, ntype, flags, ¶ms);
2740 else
2741 err = 0;
2742
2743 if (!err && params.use_4addr != -1)
2744 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2745
2746 return err;
2747 }
2748
2749 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2750 {
2751 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2752 struct vif_params params;
2753 struct wireless_dev *wdev;
2754 struct sk_buff *msg, *event;
2755 int err;
2756 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2757 u32 flags;
2758
2759 /* to avoid failing a new interface creation due to pending removal */
2760 cfg80211_destroy_ifaces(rdev);
2761
2762 memset(¶ms, 0, sizeof(params));
2763
2764 if (!info->attrs[NL80211_ATTR_IFNAME])
2765 return -EINVAL;
2766
2767 if (info->attrs[NL80211_ATTR_IFTYPE]) {
2768 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2769 if (type > NL80211_IFTYPE_MAX)
2770 return -EINVAL;
2771 }
2772
2773 if (!rdev->ops->add_virtual_intf ||
2774 !(rdev->wiphy.interface_modes & (1 << type)))
2775 return -EOPNOTSUPP;
2776
2777 if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2778 rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2779 info->attrs[NL80211_ATTR_MAC]) {
2780 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2781 ETH_ALEN);
2782 if (!is_valid_ether_addr(params.macaddr))
2783 return -EADDRNOTAVAIL;
2784 }
2785
2786 if (info->attrs[NL80211_ATTR_4ADDR]) {
2787 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2788 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2789 if (err)
2790 return err;
2791 }
2792
2793 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2794 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2795 &flags);
2796
2797 if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2798 !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2799 return -EOPNOTSUPP;
2800
2801 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2802 if (!msg)
2803 return -ENOMEM;
2804
2805 wdev = rdev_add_virtual_intf(rdev,
2806 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2807 NET_NAME_USER, type, err ? NULL : &flags,
2808 ¶ms);
2809 if (WARN_ON(!wdev)) {
2810 nlmsg_free(msg);
2811 return -EPROTO;
2812 } else if (IS_ERR(wdev)) {
2813 nlmsg_free(msg);
2814 return PTR_ERR(wdev);
2815 }
2816
2817 if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2818 wdev->owner_nlportid = info->snd_portid;
2819
2820 switch (type) {
2821 case NL80211_IFTYPE_MESH_POINT:
2822 if (!info->attrs[NL80211_ATTR_MESH_ID])
2823 break;
2824 wdev_lock(wdev);
2825 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2826 IEEE80211_MAX_MESH_ID_LEN);
2827 wdev->mesh_id_up_len =
2828 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2829 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2830 wdev->mesh_id_up_len);
2831 wdev_unlock(wdev);
2832 break;
2833 case NL80211_IFTYPE_P2P_DEVICE:
2834 /*
2835 * P2P Device doesn't have a netdev, so doesn't go
2836 * through the netdev notifier and must be added here
2837 */
2838 mutex_init(&wdev->mtx);
2839 INIT_LIST_HEAD(&wdev->event_list);
2840 spin_lock_init(&wdev->event_lock);
2841 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2842 spin_lock_init(&wdev->mgmt_registrations_lock);
2843
2844 wdev->identifier = ++rdev->wdev_id;
2845 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2846 rdev->devlist_generation++;
2847 break;
2848 default:
2849 break;
2850 }
2851
2852 if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2853 rdev, wdev, false) < 0) {
2854 nlmsg_free(msg);
2855 return -ENOBUFS;
2856 }
2857
2858 event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2859 if (event) {
2860 if (nl80211_send_iface(event, 0, 0, 0,
2861 rdev, wdev, false) < 0) {
2862 nlmsg_free(event);
2863 goto out;
2864 }
2865
2866 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2867 event, 0, NL80211_MCGRP_CONFIG,
2868 GFP_KERNEL);
2869 }
2870
2871 out:
2872 return genlmsg_reply(msg, info);
2873 }
2874
2875 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2876 {
2877 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2878 struct wireless_dev *wdev = info->user_ptr[1];
2879 struct sk_buff *msg;
2880 int status;
2881
2882 if (!rdev->ops->del_virtual_intf)
2883 return -EOPNOTSUPP;
2884
2885 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2886 if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2887 nlmsg_free(msg);
2888 msg = NULL;
2889 }
2890
2891 /*
2892 * If we remove a wireless device without a netdev then clear
2893 * user_ptr[1] so that nl80211_post_doit won't dereference it
2894 * to check if it needs to do dev_put(). Otherwise it crashes
2895 * since the wdev has been freed, unlike with a netdev where
2896 * we need the dev_put() for the netdev to really be freed.
2897 */
2898 if (!wdev->netdev)
2899 info->user_ptr[1] = NULL;
2900
2901 status = rdev_del_virtual_intf(rdev, wdev);
2902 if (status >= 0 && msg)
2903 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2904 msg, 0, NL80211_MCGRP_CONFIG,
2905 GFP_KERNEL);
2906 else
2907 nlmsg_free(msg);
2908
2909 return status;
2910 }
2911
2912 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2913 {
2914 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2915 struct net_device *dev = info->user_ptr[1];
2916 u16 noack_map;
2917
2918 if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2919 return -EINVAL;
2920
2921 if (!rdev->ops->set_noack_map)
2922 return -EOPNOTSUPP;
2923
2924 noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2925
2926 return rdev_set_noack_map(rdev, dev, noack_map);
2927 }
2928
2929 struct get_key_cookie {
2930 struct sk_buff *msg;
2931 int error;
2932 int idx;
2933 };
2934
2935 static void get_key_callback(void *c, struct key_params *params)
2936 {
2937 struct nlattr *key;
2938 struct get_key_cookie *cookie = c;
2939
2940 if ((params->key &&
2941 nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2942 params->key_len, params->key)) ||
2943 (params->seq &&
2944 nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2945 params->seq_len, params->seq)) ||
2946 (params->cipher &&
2947 nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2948 params->cipher)))
2949 goto nla_put_failure;
2950
2951 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2952 if (!key)
2953 goto nla_put_failure;
2954
2955 if ((params->key &&
2956 nla_put(cookie->msg, NL80211_KEY_DATA,
2957 params->key_len, params->key)) ||
2958 (params->seq &&
2959 nla_put(cookie->msg, NL80211_KEY_SEQ,
2960 params->seq_len, params->seq)) ||
2961 (params->cipher &&
2962 nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2963 params->cipher)))
2964 goto nla_put_failure;
2965
2966 if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2967 goto nla_put_failure;
2968
2969 nla_nest_end(cookie->msg, key);
2970
2971 return;
2972 nla_put_failure:
2973 cookie->error = 1;
2974 }
2975
2976 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2977 {
2978 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2979 int err;
2980 struct net_device *dev = info->user_ptr[1];
2981 u8 key_idx = 0;
2982 const u8 *mac_addr = NULL;
2983 bool pairwise;
2984 struct get_key_cookie cookie = {
2985 .error = 0,
2986 };
2987 void *hdr;
2988 struct sk_buff *msg;
2989
2990 if (info->attrs[NL80211_ATTR_KEY_IDX])
2991 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2992
2993 if (key_idx > 5)
2994 return -EINVAL;
2995
2996 if (info->attrs[NL80211_ATTR_MAC])
2997 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2998
2999 pairwise = !!mac_addr;
3000 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3001 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3002
3003 if (kt >= NUM_NL80211_KEYTYPES)
3004 return -EINVAL;
3005 if (kt != NL80211_KEYTYPE_GROUP &&
3006 kt != NL80211_KEYTYPE_PAIRWISE)
3007 return -EINVAL;
3008 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3009 }
3010
3011 if (!rdev->ops->get_key)
3012 return -EOPNOTSUPP;
3013
3014 if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3015 return -ENOENT;
3016
3017 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3018 if (!msg)
3019 return -ENOMEM;
3020
3021 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3022 NL80211_CMD_NEW_KEY);
3023 if (!hdr)
3024 goto nla_put_failure;
3025
3026 cookie.msg = msg;
3027 cookie.idx = key_idx;
3028
3029 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3030 nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3031 goto nla_put_failure;
3032 if (mac_addr &&
3033 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3034 goto nla_put_failure;
3035
3036 err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3037 get_key_callback);
3038
3039 if (err)
3040 goto free_msg;
3041
3042 if (cookie.error)
3043 goto nla_put_failure;
3044
3045 genlmsg_end(msg, hdr);
3046 return genlmsg_reply(msg, info);
3047
3048 nla_put_failure:
3049 err = -ENOBUFS;
3050 free_msg:
3051 nlmsg_free(msg);
3052 return err;
3053 }
3054
3055 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3056 {
3057 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3058 struct key_parse key;
3059 int err;
3060 struct net_device *dev = info->user_ptr[1];
3061
3062 err = nl80211_parse_key(info, &key);
3063 if (err)
3064 return err;
3065
3066 if (key.idx < 0)
3067 return -EINVAL;
3068
3069 /* only support setting default key */
3070 if (!key.def && !key.defmgmt)
3071 return -EINVAL;
3072
3073 wdev_lock(dev->ieee80211_ptr);
3074
3075 if (key.def) {
3076 if (!rdev->ops->set_default_key) {
3077 err = -EOPNOTSUPP;
3078 goto out;
3079 }
3080
3081 err = nl80211_key_allowed(dev->ieee80211_ptr);
3082 if (err)
3083 goto out;
3084
3085 err = rdev_set_default_key(rdev, dev, key.idx,
3086 key.def_uni, key.def_multi);
3087
3088 if (err)
3089 goto out;
3090
3091 #ifdef CONFIG_CFG80211_WEXT
3092 dev->ieee80211_ptr->wext.default_key = key.idx;
3093 #endif
3094 } else {
3095 if (key.def_uni || !key.def_multi) {
3096 err = -EINVAL;
3097 goto out;
3098 }
3099
3100 if (!rdev->ops->set_default_mgmt_key) {
3101 err = -EOPNOTSUPP;
3102 goto out;
3103 }
3104
3105 err = nl80211_key_allowed(dev->ieee80211_ptr);
3106 if (err)
3107 goto out;
3108
3109 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3110 if (err)
3111 goto out;
3112
3113 #ifdef CONFIG_CFG80211_WEXT
3114 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3115 #endif
3116 }
3117
3118 out:
3119 wdev_unlock(dev->ieee80211_ptr);
3120
3121 return err;
3122 }
3123
3124 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3125 {
3126 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3127 int err;
3128 struct net_device *dev = info->user_ptr[1];
3129 struct key_parse key;
3130 const u8 *mac_addr = NULL;
3131
3132 err = nl80211_parse_key(info, &key);
3133 if (err)
3134 return err;
3135
3136 if (!key.p.key)
3137 return -EINVAL;
3138
3139 if (info->attrs[NL80211_ATTR_MAC])
3140 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3141
3142 if (key.type == -1) {
3143 if (mac_addr)
3144 key.type = NL80211_KEYTYPE_PAIRWISE;
3145 else
3146 key.type = NL80211_KEYTYPE_GROUP;
3147 }
3148
3149 /* for now */
3150 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3151 key.type != NL80211_KEYTYPE_GROUP)
3152 return -EINVAL;
3153
3154 if (!rdev->ops->add_key)
3155 return -EOPNOTSUPP;
3156
3157 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3158 key.type == NL80211_KEYTYPE_PAIRWISE,
3159 mac_addr))
3160 return -EINVAL;
3161
3162 wdev_lock(dev->ieee80211_ptr);
3163 err = nl80211_key_allowed(dev->ieee80211_ptr);
3164 if (!err)
3165 err = rdev_add_key(rdev, dev, key.idx,
3166 key.type == NL80211_KEYTYPE_PAIRWISE,
3167 mac_addr, &key.p);
3168 wdev_unlock(dev->ieee80211_ptr);
3169
3170 return err;
3171 }
3172
3173 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3174 {
3175 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3176 int err;
3177 struct net_device *dev = info->user_ptr[1];
3178 u8 *mac_addr = NULL;
3179 struct key_parse key;
3180
3181 err = nl80211_parse_key(info, &key);
3182 if (err)
3183 return err;
3184
3185 if (info->attrs[NL80211_ATTR_MAC])
3186 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3187
3188 if (key.type == -1) {
3189 if (mac_addr)
3190 key.type = NL80211_KEYTYPE_PAIRWISE;
3191 else
3192 key.type = NL80211_KEYTYPE_GROUP;
3193 }
3194
3195 /* for now */
3196 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3197 key.type != NL80211_KEYTYPE_GROUP)
3198 return -EINVAL;
3199
3200 if (!rdev->ops->del_key)
3201 return -EOPNOTSUPP;
3202
3203 wdev_lock(dev->ieee80211_ptr);
3204 err = nl80211_key_allowed(dev->ieee80211_ptr);
3205
3206 if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3207 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3208 err = -ENOENT;
3209
3210 if (!err)
3211 err = rdev_del_key(rdev, dev, key.idx,
3212 key.type == NL80211_KEYTYPE_PAIRWISE,
3213 mac_addr);
3214
3215 #ifdef CONFIG_CFG80211_WEXT
3216 if (!err) {
3217 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3218 dev->ieee80211_ptr->wext.default_key = -1;
3219 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3220 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3221 }
3222 #endif
3223 wdev_unlock(dev->ieee80211_ptr);
3224
3225 return err;
3226 }
3227
3228 /* This function returns an error or the number of nested attributes */
3229 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3230 {
3231 struct nlattr *attr;
3232 int n_entries = 0, tmp;
3233
3234 nla_for_each_nested(attr, nl_attr, tmp) {
3235 if (nla_len(attr) != ETH_ALEN)
3236 return -EINVAL;
3237
3238 n_entries++;
3239 }
3240
3241 return n_entries;
3242 }
3243
3244 /*
3245 * This function parses ACL information and allocates memory for ACL data.
3246 * On successful return, the calling function is responsible to free the
3247 * ACL buffer returned by this function.
3248 */
3249 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3250 struct genl_info *info)
3251 {
3252 enum nl80211_acl_policy acl_policy;
3253 struct nlattr *attr;
3254 struct cfg80211_acl_data *acl;
3255 int i = 0, n_entries, tmp;
3256
3257 if (!wiphy->max_acl_mac_addrs)
3258 return ERR_PTR(-EOPNOTSUPP);
3259
3260 if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3261 return ERR_PTR(-EINVAL);
3262
3263 acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3264 if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3265 acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3266 return ERR_PTR(-EINVAL);
3267
3268 if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3269 return ERR_PTR(-EINVAL);
3270
3271 n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3272 if (n_entries < 0)
3273 return ERR_PTR(n_entries);
3274
3275 if (n_entries > wiphy->max_acl_mac_addrs)
3276 return ERR_PTR(-ENOTSUPP);
3277
3278 acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3279 GFP_KERNEL);
3280 if (!acl)
3281 return ERR_PTR(-ENOMEM);
3282
3283 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3284 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3285 i++;
3286 }
3287
3288 acl->n_acl_entries = n_entries;
3289 acl->acl_policy = acl_policy;
3290
3291 return acl;
3292 }
3293
3294 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3295 {
3296 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3297 struct net_device *dev = info->user_ptr[1];
3298 struct cfg80211_acl_data *acl;
3299 int err;
3300
3301 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3302 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3303 return -EOPNOTSUPP;
3304
3305 if (!dev->ieee80211_ptr->beacon_interval)
3306 return -EINVAL;
3307
3308 acl = parse_acl_data(&rdev->wiphy, info);
3309 if (IS_ERR(acl))
3310 return PTR_ERR(acl);
3311
3312 err = rdev_set_mac_acl(rdev, dev, acl);
3313
3314 kfree(acl);
3315
3316 return err;
3317 }
3318
3319 static int nl80211_parse_beacon(struct nlattr *attrs[],
3320 struct cfg80211_beacon_data *bcn)
3321 {
3322 bool haveinfo = false;
3323
3324 if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3325 !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3326 !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3327 !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3328 return -EINVAL;
3329
3330 memset(bcn, 0, sizeof(*bcn));
3331
3332 if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3333 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3334 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3335 if (!bcn->head_len)
3336 return -EINVAL;
3337 haveinfo = true;
3338 }
3339
3340 if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3341 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3342 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3343 haveinfo = true;
3344 }
3345
3346 if (!haveinfo)
3347 return -EINVAL;
3348
3349 if (attrs[NL80211_ATTR_IE]) {
3350 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3351 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3352 }
3353
3354 if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3355 bcn->proberesp_ies =
3356 nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3357 bcn->proberesp_ies_len =
3358 nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3359 }
3360
3361 if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3362 bcn->assocresp_ies =
3363 nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3364 bcn->assocresp_ies_len =
3365 nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3366 }
3367
3368 if (attrs[NL80211_ATTR_PROBE_RESP]) {
3369 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3370 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3371 }
3372
3373 return 0;
3374 }
3375
3376 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3377 struct cfg80211_ap_settings *params)
3378 {
3379 struct wireless_dev *wdev;
3380 bool ret = false;
3381
3382 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3383 if (wdev->iftype != NL80211_IFTYPE_AP &&
3384 wdev->iftype != NL80211_IFTYPE_P2P_GO)
3385 continue;
3386
3387 if (!wdev->preset_chandef.chan)
3388 continue;
3389
3390 params->chandef = wdev->preset_chandef;
3391 ret = true;
3392 break;
3393 }
3394
3395 return ret;
3396 }
3397
3398 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3399 enum nl80211_auth_type auth_type,
3400 enum nl80211_commands cmd)
3401 {
3402 if (auth_type > NL80211_AUTHTYPE_MAX)
3403 return false;
3404
3405 switch (cmd) {
3406 case NL80211_CMD_AUTHENTICATE:
3407 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3408 auth_type == NL80211_AUTHTYPE_SAE)
3409 return false;
3410 return true;
3411 case NL80211_CMD_CONNECT:
3412 case NL80211_CMD_START_AP:
3413 /* SAE not supported yet */
3414 if (auth_type == NL80211_AUTHTYPE_SAE)
3415 return false;
3416 return true;
3417 default:
3418 return false;
3419 }
3420 }
3421
3422 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3423 {
3424 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3425 struct net_device *dev = info->user_ptr[1];
3426 struct wireless_dev *wdev = dev->ieee80211_ptr;
3427 struct cfg80211_ap_settings params;
3428 int err;
3429
3430 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3431 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3432 return -EOPNOTSUPP;
3433
3434 if (!rdev->ops->start_ap)
3435 return -EOPNOTSUPP;
3436
3437 if (wdev->beacon_interval)
3438 return -EALREADY;
3439
3440 memset(¶ms, 0, sizeof(params));
3441
3442 /* these are required for START_AP */
3443 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3444 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3445 !info->attrs[NL80211_ATTR_BEACON_HEAD])
3446 return -EINVAL;
3447
3448 err = nl80211_parse_beacon(info->attrs, ¶ms.beacon);
3449 if (err)
3450 return err;
3451
3452 params.beacon_interval =
3453 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3454 params.dtim_period =
3455 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3456
3457 err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3458 if (err)
3459 return err;
3460
3461 /*
3462 * In theory, some of these attributes should be required here
3463 * but since they were not used when the command was originally
3464 * added, keep them optional for old user space programs to let
3465 * them continue to work with drivers that do not need the
3466 * additional information -- drivers must check!
3467 */
3468 if (info->attrs[NL80211_ATTR_SSID]) {
3469 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3470 params.ssid_len =
3471 nla_len(info->attrs[NL80211_ATTR_SSID]);
3472 if (params.ssid_len == 0 ||
3473 params.ssid_len > IEEE80211_MAX_SSID_LEN)
3474 return -EINVAL;
3475 }
3476
3477 if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3478 params.hidden_ssid = nla_get_u32(
3479 info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3480 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3481 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3482 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3483 return -EINVAL;
3484 }
3485
3486 params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3487
3488 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3489 params.auth_type = nla_get_u32(
3490 info->attrs[NL80211_ATTR_AUTH_TYPE]);
3491 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3492 NL80211_CMD_START_AP))
3493 return -EINVAL;
3494 } else
3495 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3496
3497 err = nl80211_crypto_settings(rdev, info, ¶ms.crypto,
3498 NL80211_MAX_NR_CIPHER_SUITES);
3499 if (err)
3500 return err;
3501
3502 if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3503 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3504 return -EOPNOTSUPP;
3505 params.inactivity_timeout = nla_get_u16(
3506 info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3507 }
3508
3509 if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3510 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3511 return -EINVAL;
3512 params.p2p_ctwindow =
3513 nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3514 if (params.p2p_ctwindow > 127)
3515 return -EINVAL;
3516 if (params.p2p_ctwindow != 0 &&
3517 !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3518 return -EINVAL;
3519 }
3520
3521 if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3522 u8 tmp;
3523
3524 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3525 return -EINVAL;
3526 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3527 if (tmp > 1)
3528 return -EINVAL;
3529 params.p2p_opp_ps = tmp;
3530 if (params.p2p_opp_ps != 0 &&
3531 !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3532 return -EINVAL;
3533 }
3534
3535 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3536 err = nl80211_parse_chandef(rdev, info, ¶ms.chandef);
3537 if (err)
3538 return err;
3539 } else if (wdev->preset_chandef.chan) {
3540 params.chandef = wdev->preset_chandef;
3541 } else if (!nl80211_get_ap_channel(rdev, ¶ms))
3542 return -EINVAL;
3543
3544 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, ¶ms.chandef,
3545 wdev->iftype))
3546 return -EINVAL;
3547
3548 if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3549 params.smps_mode =
3550 nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3551 switch (params.smps_mode) {
3552 case NL80211_SMPS_OFF:
3553 break;
3554 case NL80211_SMPS_STATIC:
3555 if (!(rdev->wiphy.features &
3556 NL80211_FEATURE_STATIC_SMPS))
3557 return -EINVAL;
3558 break;
3559 case NL80211_SMPS_DYNAMIC:
3560 if (!(rdev->wiphy.features &
3561 NL80211_FEATURE_DYNAMIC_SMPS))
3562 return -EINVAL;
3563 break;
3564 default:
3565 return -EINVAL;
3566 }
3567 } else {
3568 params.smps_mode = NL80211_SMPS_OFF;
3569 }
3570
3571 params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3572 if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3573 return -EOPNOTSUPP;
3574
3575 if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3576 params.acl = parse_acl_data(&rdev->wiphy, info);
3577 if (IS_ERR(params.acl))
3578 return PTR_ERR(params.acl);
3579 }
3580
3581 wdev_lock(wdev);
3582 err = rdev_start_ap(rdev, dev, ¶ms);
3583 if (!err) {
3584 wdev->preset_chandef = params.chandef;
3585 wdev->beacon_interval = params.beacon_interval;
3586 wdev->chandef = params.chandef;
3587 wdev->ssid_len = params.ssid_len;
3588 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3589 }
3590 wdev_unlock(wdev);
3591
3592 kfree(params.acl);
3593
3594 return err;
3595 }
3596
3597 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3598 {
3599 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3600 struct net_device *dev = info->user_ptr[1];
3601 struct wireless_dev *wdev = dev->ieee80211_ptr;
3602 struct cfg80211_beacon_data params;
3603 int err;
3604
3605 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3606 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3607 return -EOPNOTSUPP;
3608
3609 if (!rdev->ops->change_beacon)
3610 return -EOPNOTSUPP;
3611
3612 if (!wdev->beacon_interval)
3613 return -EINVAL;
3614
3615 err = nl80211_parse_beacon(info->attrs, ¶ms);
3616 if (err)
3617 return err;
3618
3619 wdev_lock(wdev);
3620 err = rdev_change_beacon(rdev, dev, ¶ms);
3621 wdev_unlock(wdev);
3622
3623 return err;
3624 }
3625
3626 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3627 {
3628 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3629 struct net_device *dev = info->user_ptr[1];
3630
3631 return cfg80211_stop_ap(rdev, dev, false);
3632 }
3633
3634 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3635 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3636 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3637 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3638 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3639 [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3640 [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3641 };
3642
3643 static int parse_station_flags(struct genl_info *info,
3644 enum nl80211_iftype iftype,
3645 struct station_parameters *params)
3646 {
3647 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3648 struct nlattr *nla;
3649 int flag;
3650
3651 /*
3652 * Try parsing the new attribute first so userspace
3653 * can specify both for older kernels.
3654 */
3655 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3656 if (nla) {
3657 struct nl80211_sta_flag_update *sta_flags;
3658
3659 sta_flags = nla_data(nla);
3660 params->sta_flags_mask = sta_flags->mask;
3661 params->sta_flags_set = sta_flags->set;
3662 params->sta_flags_set &= params->sta_flags_mask;
3663 if ((params->sta_flags_mask |
3664 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3665 return -EINVAL;
3666 return 0;
3667 }
3668
3669 /* if present, parse the old attribute */
3670
3671 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3672 if (!nla)
3673 return 0;
3674
3675 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3676 nla, sta_flags_policy))
3677 return -EINVAL;
3678
3679 /*
3680 * Only allow certain flags for interface types so that
3681 * other attributes are silently ignored. Remember that
3682 * this is backward compatibility code with old userspace
3683 * and shouldn't be hit in other cases anyway.
3684 */
3685 switch (iftype) {
3686 case NL80211_IFTYPE_AP:
3687 case NL80211_IFTYPE_AP_VLAN:
3688 case NL80211_IFTYPE_P2P_GO:
3689 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3690 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3691 BIT(NL80211_STA_FLAG_WME) |
3692 BIT(NL80211_STA_FLAG_MFP);
3693 break;
3694 case NL80211_IFTYPE_P2P_CLIENT:
3695 case NL80211_IFTYPE_STATION:
3696 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3697 BIT(NL80211_STA_FLAG_TDLS_PEER);
3698 break;
3699 case NL80211_IFTYPE_MESH_POINT:
3700 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3701 BIT(NL80211_STA_FLAG_MFP) |
3702 BIT(NL80211_STA_FLAG_AUTHORIZED);
3703 default:
3704 return -EINVAL;
3705 }
3706
3707 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3708 if (flags[flag]) {
3709 params->sta_flags_set |= (1<<flag);
3710
3711 /* no longer support new API additions in old API */
3712 if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3713 return -EINVAL;
3714 }
3715 }
3716
3717 return 0;
3718 }
3719
3720 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3721 int attr)
3722 {
3723 struct nlattr *rate;
3724 u32 bitrate;
3725 u16 bitrate_compat;
3726 enum nl80211_attrs rate_flg;
3727
3728 rate = nla_nest_start(msg, attr);
3729 if (!rate)
3730 return false;
3731
3732 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3733 bitrate = cfg80211_calculate_bitrate(info);
3734 /* report 16-bit bitrate only if we can */
3735 bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3736 if (bitrate > 0 &&
3737 nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3738 return false;
3739 if (bitrate_compat > 0 &&
3740 nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3741 return false;
3742
3743 switch (info->bw) {
3744 case RATE_INFO_BW_5:
3745 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3746 break;
3747 case RATE_INFO_BW_10:
3748 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3749 break;
3750 default:
3751 WARN_ON(1);
3752 /* fall through */
3753 case RATE_INFO_BW_20:
3754 rate_flg = 0;
3755 break;
3756 case RATE_INFO_BW_40:
3757 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3758 break;
3759 case RATE_INFO_BW_80:
3760 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3761 break;
3762 case RATE_INFO_BW_160:
3763 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3764 break;
3765 }
3766
3767 if (rate_flg && nla_put_flag(msg, rate_flg))
3768 return false;
3769
3770 if (info->flags & RATE_INFO_FLAGS_MCS) {
3771 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3772 return false;
3773 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3774 nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3775 return false;
3776 } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3777 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3778 return false;
3779 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3780 return false;
3781 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3782 nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3783 return false;
3784 }
3785
3786 nla_nest_end(msg, rate);
3787 return true;
3788 }
3789
3790 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3791 int id)
3792 {
3793 void *attr;
3794 int i = 0;
3795
3796 if (!mask)
3797 return true;
3798
3799 attr = nla_nest_start(msg, id);
3800 if (!attr)
3801 return false;
3802
3803 for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3804 if (!(mask & BIT(i)))
3805 continue;
3806
3807 if (nla_put_u8(msg, i, signal[i]))
3808 return false;
3809 }
3810
3811 nla_nest_end(msg, attr);
3812
3813 return true;
3814 }
3815
3816 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3817 u32 seq, int flags,
3818 struct cfg80211_registered_device *rdev,
3819 struct net_device *dev,
3820 const u8 *mac_addr, struct station_info *sinfo)
3821 {
3822 void *hdr;
3823 struct nlattr *sinfoattr, *bss_param;
3824
3825 hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3826 if (!hdr)
3827 return -1;
3828
3829 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3830 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3831 nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3832 goto nla_put_failure;
3833
3834 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3835 if (!sinfoattr)
3836 goto nla_put_failure;
3837
3838 #define PUT_SINFO(attr, memb, type) do { \
3839 BUILD_BUG_ON(sizeof(type) == sizeof(u64)); \
3840 if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) && \
3841 nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr, \
3842 sinfo->memb)) \
3843 goto nla_put_failure; \
3844 } while (0)
3845 #define PUT_SINFO_U64(attr, memb) do { \
3846 if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) && \
3847 nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr, \
3848 sinfo->memb, NL80211_STA_INFO_PAD)) \
3849 goto nla_put_failure; \
3850 } while (0)
3851
3852 PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3853 PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3854
3855 if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3856 BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3857 nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3858 (u32)sinfo->rx_bytes))
3859 goto nla_put_failure;
3860
3861 if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3862 BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3863 nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3864 (u32)sinfo->tx_bytes))
3865 goto nla_put_failure;
3866
3867 PUT_SINFO_U64(RX_BYTES64, rx_bytes);
3868 PUT_SINFO_U64(TX_BYTES64, tx_bytes);
3869 PUT_SINFO(LLID, llid, u16);
3870 PUT_SINFO(PLID, plid, u16);
3871 PUT_SINFO(PLINK_STATE, plink_state, u8);
3872 PUT_SINFO_U64(RX_DURATION, rx_duration);
3873
3874 switch (rdev->wiphy.signal_type) {
3875 case CFG80211_SIGNAL_TYPE_MBM:
3876 PUT_SINFO(SIGNAL, signal, u8);
3877 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3878 break;
3879 default:
3880 break;
3881 }
3882 if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3883 if (!nl80211_put_signal(msg, sinfo->chains,
3884 sinfo->chain_signal,
3885 NL80211_STA_INFO_CHAIN_SIGNAL))
3886 goto nla_put_failure;
3887 }
3888 if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3889 if (!nl80211_put_signal(msg, sinfo->chains,
3890 sinfo->chain_signal_avg,
3891 NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3892 goto nla_put_failure;
3893 }
3894 if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3895 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3896 NL80211_STA_INFO_TX_BITRATE))
3897 goto nla_put_failure;
3898 }
3899 if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3900 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3901 NL80211_STA_INFO_RX_BITRATE))
3902 goto nla_put_failure;
3903 }
3904
3905 PUT_SINFO(RX_PACKETS, rx_packets, u32);
3906 PUT_SINFO(TX_PACKETS, tx_packets, u32);
3907 PUT_SINFO(TX_RETRIES, tx_retries, u32);
3908 PUT_SINFO(TX_FAILED, tx_failed, u32);
3909 PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3910 PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3911 PUT_SINFO(LOCAL_PM, local_pm, u32);
3912 PUT_SINFO(PEER_PM, peer_pm, u32);
3913 PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3914
3915 if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3916 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3917 if (!bss_param)
3918 goto nla_put_failure;
3919
3920 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3921 nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3922 ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3923 nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3924 ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3925 nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3926 nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3927 sinfo->bss_param.dtim_period) ||
3928 nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3929 sinfo->bss_param.beacon_interval))
3930 goto nla_put_failure;
3931
3932 nla_nest_end(msg, bss_param);
3933 }
3934 if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3935 nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3936 sizeof(struct nl80211_sta_flag_update),
3937 &sinfo->sta_flags))
3938 goto nla_put_failure;
3939
3940 PUT_SINFO_U64(T_OFFSET, t_offset);
3941 PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
3942 PUT_SINFO_U64(BEACON_RX, rx_beacon);
3943 PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3944
3945 #undef PUT_SINFO
3946 #undef PUT_SINFO_U64
3947
3948 if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3949 struct nlattr *tidsattr;
3950 int tid;
3951
3952 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3953 if (!tidsattr)
3954 goto nla_put_failure;
3955
3956 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3957 struct cfg80211_tid_stats *tidstats;
3958 struct nlattr *tidattr;
3959
3960 tidstats = &sinfo->pertid[tid];
3961
3962 if (!tidstats->filled)
3963 continue;
3964
3965 tidattr = nla_nest_start(msg, tid + 1);
3966 if (!tidattr)
3967 goto nla_put_failure;
3968
3969 #define PUT_TIDVAL_U64(attr, memb) do { \
3970 if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) && \
3971 nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr, \
3972 tidstats->memb, NL80211_TID_STATS_PAD)) \
3973 goto nla_put_failure; \
3974 } while (0)
3975
3976 PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
3977 PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
3978 PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
3979 PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
3980
3981 #undef PUT_TIDVAL_U64
3982 nla_nest_end(msg, tidattr);
3983 }
3984
3985 nla_nest_end(msg, tidsattr);
3986 }
3987
3988 nla_nest_end(msg, sinfoattr);
3989
3990 if (sinfo->assoc_req_ies_len &&
3991 nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3992 sinfo->assoc_req_ies))
3993 goto nla_put_failure;
3994
3995 genlmsg_end(msg, hdr);
3996 return 0;
3997
3998 nla_put_failure:
3999 genlmsg_cancel(msg, hdr);
4000 return -EMSGSIZE;
4001 }
4002
4003 static int nl80211_dump_station(struct sk_buff *skb,
4004 struct netlink_callback *cb)
4005 {
4006 struct station_info sinfo;
4007 struct cfg80211_registered_device *rdev;
4008 struct wireless_dev *wdev;
4009 u8 mac_addr[ETH_ALEN];
4010 int sta_idx = cb->args[2];
4011 int err;
4012
4013 err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4014 if (err)
4015 return err;
4016
4017 if (!wdev->netdev) {
4018 err = -EINVAL;
4019 goto out_err;
4020 }
4021
4022 if (!rdev->ops->dump_station) {
4023 err = -EOPNOTSUPP;
4024 goto out_err;
4025 }
4026
4027 while (1) {
4028 memset(&sinfo, 0, sizeof(sinfo));
4029 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4030 mac_addr, &sinfo);
4031 if (err == -ENOENT)
4032 break;
4033 if (err)
4034 goto out_err;
4035
4036 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4037 NETLINK_CB(cb->skb).portid,
4038 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4039 rdev, wdev->netdev, mac_addr,
4040 &sinfo) < 0)
4041 goto out;
4042
4043 sta_idx++;
4044 }
4045
4046 out:
4047 cb->args[2] = sta_idx;
4048 err = skb->len;
4049 out_err:
4050 nl80211_finish_wdev_dump(rdev);
4051
4052 return err;
4053 }
4054
4055 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4056 {
4057 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4058 struct net_device *dev = info->user_ptr[1];
4059 struct station_info sinfo;
4060 struct sk_buff *msg;
4061 u8 *mac_addr = NULL;
4062 int err;
4063
4064 memset(&sinfo, 0, sizeof(sinfo));
4065
4066 if (!info->attrs[NL80211_ATTR_MAC])
4067 return -EINVAL;
4068
4069 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4070
4071 if (!rdev->ops->get_station)
4072 return -EOPNOTSUPP;
4073
4074 err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4075 if (err)
4076 return err;
4077
4078 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4079 if (!msg)
4080 return -ENOMEM;
4081
4082 if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4083 info->snd_portid, info->snd_seq, 0,
4084 rdev, dev, mac_addr, &sinfo) < 0) {
4085 nlmsg_free(msg);
4086 return -ENOBUFS;
4087 }
4088
4089 return genlmsg_reply(msg, info);
4090 }
4091
4092 int cfg80211_check_station_change(struct wiphy *wiphy,
4093 struct station_parameters *params,
4094 enum cfg80211_station_type statype)
4095 {
4096 if (params->listen_interval != -1 &&
4097 statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4098 return -EINVAL;
4099
4100 if (params->support_p2p_ps != -1 &&
4101 statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4102 return -EINVAL;
4103
4104 if (params->aid &&
4105 !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4106 statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4107 return -EINVAL;
4108
4109 /* When you run into this, adjust the code below for the new flag */
4110 BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4111
4112 switch (statype) {
4113 case CFG80211_STA_MESH_PEER_KERNEL:
4114 case CFG80211_STA_MESH_PEER_USER:
4115 /*
4116 * No ignoring the TDLS flag here -- the userspace mesh
4117 * code doesn't have the bug of including TDLS in the
4118 * mask everywhere.
4119 */
4120 if (params->sta_flags_mask &
4121 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4122 BIT(NL80211_STA_FLAG_MFP) |
4123 BIT(NL80211_STA_FLAG_AUTHORIZED)))
4124 return -EINVAL;
4125 break;
4126 case CFG80211_STA_TDLS_PEER_SETUP:
4127 case CFG80211_STA_TDLS_PEER_ACTIVE:
4128 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4129 return -EINVAL;
4130 /* ignore since it can't change */
4131 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4132 break;
4133 default:
4134 /* disallow mesh-specific things */
4135 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4136 return -EINVAL;
4137 if (params->local_pm)
4138 return -EINVAL;
4139 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4140 return -EINVAL;
4141 }
4142
4143 if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4144 statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4145 /* TDLS can't be set, ... */
4146 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4147 return -EINVAL;
4148 /*
4149 * ... but don't bother the driver with it. This works around
4150 * a hostapd/wpa_supplicant issue -- it always includes the
4151 * TLDS_PEER flag in the mask even for AP mode.
4152 */
4153 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4154 }
4155
4156 if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4157 statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4158 /* reject other things that can't change */
4159 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4160 return -EINVAL;
4161 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4162 return -EINVAL;
4163 if (params->supported_rates)
4164 return -EINVAL;
4165 if (params->ext_capab || params->ht_capa || params->vht_capa)
4166 return -EINVAL;
4167 }
4168
4169 if (statype != CFG80211_STA_AP_CLIENT &&
4170 statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4171 if (params->vlan)
4172 return -EINVAL;
4173 }
4174
4175 switch (statype) {
4176 case CFG80211_STA_AP_MLME_CLIENT:
4177 /* Use this only for authorizing/unauthorizing a station */
4178 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4179 return -EOPNOTSUPP;
4180 break;
4181 case CFG80211_STA_AP_CLIENT:
4182 case CFG80211_STA_AP_CLIENT_UNASSOC:
4183 /* accept only the listed bits */
4184 if (params->sta_flags_mask &
4185 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4186 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4187 BIT(NL80211_STA_FLAG_ASSOCIATED) |
4188 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4189 BIT(NL80211_STA_FLAG_WME) |
4190 BIT(NL80211_STA_FLAG_MFP)))
4191 return -EINVAL;
4192
4193 /* but authenticated/associated only if driver handles it */
4194 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4195 params->sta_flags_mask &
4196 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4197 BIT(NL80211_STA_FLAG_ASSOCIATED)))
4198 return -EINVAL;
4199 break;
4200 case CFG80211_STA_IBSS:
4201 case CFG80211_STA_AP_STA:
4202 /* reject any changes other than AUTHORIZED */
4203 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4204 return -EINVAL;
4205 break;
4206 case CFG80211_STA_TDLS_PEER_SETUP:
4207 /* reject any changes other than AUTHORIZED or WME */
4208 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4209 BIT(NL80211_STA_FLAG_WME)))
4210 return -EINVAL;
4211 /* force (at least) rates when authorizing */
4212 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4213 !params->supported_rates)
4214 return -EINVAL;
4215 break;
4216 case CFG80211_STA_TDLS_PEER_ACTIVE:
4217 /* reject any changes */
4218 return -EINVAL;
4219 case CFG80211_STA_MESH_PEER_KERNEL:
4220 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4221 return -EINVAL;
4222 break;
4223 case CFG80211_STA_MESH_PEER_USER:
4224 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4225 params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4226 return -EINVAL;
4227 break;
4228 }
4229
4230 return 0;
4231 }
4232 EXPORT_SYMBOL(cfg80211_check_station_change);
4233
4234 /*
4235 * Get vlan interface making sure it is running and on the right wiphy.
4236 */
4237 static struct net_device *get_vlan(struct genl_info *info,
4238 struct cfg80211_registered_device *rdev)
4239 {
4240 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4241 struct net_device *v;
4242 int ret;
4243
4244 if (!vlanattr)
4245 return NULL;
4246
4247 v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4248 if (!v)
4249 return ERR_PTR(-ENODEV);
4250
4251 if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4252 ret = -EINVAL;
4253 goto error;
4254 }
4255
4256 if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4257 v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4258 v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4259 ret = -EINVAL;
4260 goto error;
4261 }
4262
4263 if (!netif_running(v)) {
4264 ret = -ENETDOWN;
4265 goto error;
4266 }
4267
4268 return v;
4269 error:
4270 dev_put(v);
4271 return ERR_PTR(ret);
4272 }
4273
4274 static const struct nla_policy
4275 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4276 [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4277 [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4278 };
4279
4280 static int nl80211_parse_sta_wme(struct genl_info *info,
4281 struct station_parameters *params)
4282 {
4283 struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4284 struct nlattr *nla;
4285 int err;
4286
4287 /* parse WME attributes if present */
4288 if (!info->attrs[NL80211_ATTR_STA_WME])
4289 return 0;
4290
4291 nla = info->attrs[NL80211_ATTR_STA_WME];
4292 err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4293 nl80211_sta_wme_policy);
4294 if (err)
4295 return err;
4296
4297 if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4298 params->uapsd_queues = nla_get_u8(
4299 tb[NL80211_STA_WME_UAPSD_QUEUES]);
4300 if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4301 return -EINVAL;
4302
4303 if (tb[NL80211_STA_WME_MAX_SP])
4304 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4305
4306 if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4307 return -EINVAL;
4308
4309 params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4310
4311 return 0;
4312 }
4313
4314 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4315 struct station_parameters *params)
4316 {
4317 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4318 params->supported_channels =
4319 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4320 params->supported_channels_len =
4321 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4322 /*
4323 * Need to include at least one (first channel, number of
4324 * channels) tuple for each subband, and must have proper
4325 * tuples for the rest of the data as well.
4326 */
4327 if (params->supported_channels_len < 2)
4328 return -EINVAL;
4329 if (params->supported_channels_len % 2)
4330 return -EINVAL;
4331 }
4332
4333 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4334 params->supported_oper_classes =
4335 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4336 params->supported_oper_classes_len =
4337 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4338 /*
4339 * The value of the Length field of the Supported Operating
4340 * Classes element is between 2 and 253.
4341 */
4342 if (params->supported_oper_classes_len < 2 ||
4343 params->supported_oper_classes_len > 253)
4344 return -EINVAL;
4345 }
4346 return 0;
4347 }
4348
4349 static int nl80211_set_station_tdls(struct genl_info *info,
4350 struct station_parameters *params)
4351 {
4352 int err;
4353 /* Dummy STA entry gets updated once the peer capabilities are known */
4354 if (info->attrs[NL80211_ATTR_PEER_AID])
4355 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4356 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4357 params->ht_capa =
4358 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4359 if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4360 params->vht_capa =
4361 nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4362
4363 err = nl80211_parse_sta_channel_info(info, params);
4364 if (err)
4365 return err;
4366
4367 return nl80211_parse_sta_wme(info, params);
4368 }
4369
4370 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4371 {
4372 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4373 struct net_device *dev = info->user_ptr[1];
4374 struct station_parameters params;
4375 u8 *mac_addr;
4376 int err;
4377
4378 memset(¶ms, 0, sizeof(params));
4379
4380 if (!rdev->ops->change_station)
4381 return -EOPNOTSUPP;
4382
4383 /*
4384 * AID and listen_interval properties can be set only for unassociated
4385 * station. Include these parameters here and will check them in
4386 * cfg80211_check_station_change().
4387 */
4388 if (info->attrs[NL80211_ATTR_STA_AID])
4389 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4390
4391 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4392 params.listen_interval =
4393 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4394 else
4395 params.listen_interval = -1;
4396
4397 if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4398 u8 tmp;
4399
4400 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4401 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4402 return -EINVAL;
4403
4404 params.support_p2p_ps = tmp;
4405 } else {
4406 params.support_p2p_ps = -1;
4407 }
4408
4409 if (!info->attrs[NL80211_ATTR_MAC])
4410 return -EINVAL;
4411
4412 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4413
4414 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4415 params.supported_rates =
4416 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4417 params.supported_rates_len =
4418 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4419 }
4420
4421 if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4422 params.capability =
4423 nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4424 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4425 }
4426
4427 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4428 params.ext_capab =
4429 nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4430 params.ext_capab_len =
4431 nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4432 }
4433
4434 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, ¶ms))
4435 return -EINVAL;
4436
4437 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4438 params.plink_action =
4439 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4440 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4441 return -EINVAL;
4442 }
4443
4444 if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4445 params.plink_state =
4446 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4447 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4448 return -EINVAL;
4449 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4450 params.peer_aid = nla_get_u16(
4451 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4452 if (params.peer_aid > IEEE80211_MAX_AID)
4453 return -EINVAL;
4454 }
4455 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4456 }
4457
4458 if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4459 enum nl80211_mesh_power_mode pm = nla_get_u32(
4460 info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4461
4462 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4463 pm > NL80211_MESH_POWER_MAX)
4464 return -EINVAL;
4465
4466 params.local_pm = pm;
4467 }
4468
4469 /* Include parameters for TDLS peer (will check later) */
4470 err = nl80211_set_station_tdls(info, ¶ms);
4471 if (err)
4472 return err;
4473
4474 params.vlan = get_vlan(info, rdev);
4475 if (IS_ERR(params.vlan))
4476 return PTR_ERR(params.vlan);
4477
4478 switch (dev->ieee80211_ptr->iftype) {
4479 case NL80211_IFTYPE_AP:
4480 case NL80211_IFTYPE_AP_VLAN:
4481 case NL80211_IFTYPE_P2P_GO:
4482 case NL80211_IFTYPE_P2P_CLIENT:
4483 case NL80211_IFTYPE_STATION:
4484 case NL80211_IFTYPE_ADHOC:
4485 case NL80211_IFTYPE_MESH_POINT:
4486 break;
4487 default:
4488 err = -EOPNOTSUPP;
4489 goto out_put_vlan;
4490 }
4491
4492 /* driver will call cfg80211_check_station_change() */
4493 err = rdev_change_station(rdev, dev, mac_addr, ¶ms);
4494
4495 out_put_vlan:
4496 if (params.vlan)
4497 dev_put(params.vlan);
4498
4499 return err;
4500 }
4501
4502 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4503 {
4504 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4505 int err;
4506 struct net_device *dev = info->user_ptr[1];
4507 struct station_parameters params;
4508 u8 *mac_addr = NULL;
4509 u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4510 BIT(NL80211_STA_FLAG_ASSOCIATED);
4511
4512 memset(¶ms, 0, sizeof(params));
4513
4514 if (!rdev->ops->add_station)
4515 return -EOPNOTSUPP;
4516
4517 if (!info->attrs[NL80211_ATTR_MAC])
4518 return -EINVAL;
4519
4520 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4521 return -EINVAL;
4522
4523 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4524 return -EINVAL;
4525
4526 if (!info->attrs[NL80211_ATTR_STA_AID] &&
4527 !info->attrs[NL80211_ATTR_PEER_AID])
4528 return -EINVAL;
4529
4530 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4531 params.supported_rates =
4532 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4533 params.supported_rates_len =
4534 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4535 params.listen_interval =
4536 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4537
4538 if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4539 u8 tmp;
4540
4541 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4542 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4543 return -EINVAL;
4544
4545 params.support_p2p_ps = tmp;
4546 } else {
4547 /*
4548 * if not specified, assume it's supported for P2P GO interface,
4549 * and is NOT supported for AP interface
4550 */
4551 params.support_p2p_ps =
4552 dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4553 }
4554
4555 if (info->attrs[NL80211_ATTR_PEER_AID])
4556 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4557 else
4558 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4559 if (!params.aid || params.aid > IEEE80211_MAX_AID)
4560 return -EINVAL;
4561
4562 if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4563 params.capability =
4564 nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4565 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4566 }
4567
4568 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4569 params.ext_capab =
4570 nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4571 params.ext_capab_len =
4572 nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4573 }
4574
4575 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4576 params.ht_capa =
4577 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4578
4579 if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4580 params.vht_capa =
4581 nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4582
4583 if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4584 params.opmode_notif_used = true;
4585 params.opmode_notif =
4586 nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4587 }
4588
4589 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4590 params.plink_action =
4591 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4592 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4593 return -EINVAL;
4594 }
4595
4596 err = nl80211_parse_sta_channel_info(info, ¶ms);
4597 if (err)
4598 return err;
4599
4600 err = nl80211_parse_sta_wme(info, ¶ms);
4601 if (err)
4602 return err;
4603
4604 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, ¶ms))
4605 return -EINVAL;
4606
4607 /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4608 * as userspace might just pass through the capabilities from the IEs
4609 * directly, rather than enforcing this restriction and returning an
4610 * error in this case.
4611 */
4612 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4613 params.ht_capa = NULL;
4614 params.vht_capa = NULL;
4615 }
4616
4617 /* When you run into this, adjust the code below for the new flag */
4618 BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4619
4620 switch (dev->ieee80211_ptr->iftype) {
4621 case NL80211_IFTYPE_AP:
4622 case NL80211_IFTYPE_AP_VLAN:
4623 case NL80211_IFTYPE_P2P_GO:
4624 /* ignore WME attributes if iface/sta is not capable */
4625 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4626 !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4627 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4628
4629 /* TDLS peers cannot be added */
4630 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4631 info->attrs[NL80211_ATTR_PEER_AID])
4632 return -EINVAL;
4633 /* but don't bother the driver with it */
4634 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4635
4636 /* allow authenticated/associated only if driver handles it */
4637 if (!(rdev->wiphy.features &
4638 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4639 params.sta_flags_mask & auth_assoc)
4640 return -EINVAL;
4641
4642 /* Older userspace, or userspace wanting to be compatible with
4643 * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4644 * and assoc flags in the mask, but assumes the station will be
4645 * added as associated anyway since this was the required driver
4646 * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4647 * introduced.
4648 * In order to not bother drivers with this quirk in the API
4649 * set the flags in both the mask and set for new stations in
4650 * this case.
4651 */
4652 if (!(params.sta_flags_mask & auth_assoc)) {
4653 params.sta_flags_mask |= auth_assoc;
4654 params.sta_flags_set |= auth_assoc;
4655 }
4656
4657 /* must be last in here for error handling */
4658 params.vlan = get_vlan(info, rdev);
4659 if (IS_ERR(params.vlan))
4660 return PTR_ERR(params.vlan);
4661 break;
4662 case NL80211_IFTYPE_MESH_POINT:
4663 /* ignore uAPSD data */
4664 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4665
4666 /* associated is disallowed */
4667 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4668 return -EINVAL;
4669 /* TDLS peers cannot be added */
4670 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4671 info->attrs[NL80211_ATTR_PEER_AID])
4672 return -EINVAL;
4673 break;
4674 case NL80211_IFTYPE_STATION:
4675 case NL80211_IFTYPE_P2P_CLIENT:
4676 /* ignore uAPSD data */
4677 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4678
4679 /* these are disallowed */
4680 if (params.sta_flags_mask &
4681 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4682 BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4683 return -EINVAL;
4684 /* Only TDLS peers can be added */
4685 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4686 return -EINVAL;
4687 /* Can only add if TDLS ... */
4688 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4689 return -EOPNOTSUPP;
4690 /* ... with external setup is supported */
4691 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4692 return -EOPNOTSUPP;
4693 /*
4694 * Older wpa_supplicant versions always mark the TDLS peer
4695 * as authorized, but it shouldn't yet be.
4696 */
4697 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4698 break;
4699 default:
4700 return -EOPNOTSUPP;
4701 }
4702
4703 /* be aware of params.vlan when changing code here */
4704
4705 err = rdev_add_station(rdev, dev, mac_addr, ¶ms);
4706
4707 if (params.vlan)
4708 dev_put(params.vlan);
4709 return err;
4710 }
4711
4712 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4713 {
4714 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4715 struct net_device *dev = info->user_ptr[1];
4716 struct station_del_parameters params;
4717
4718 memset(¶ms, 0, sizeof(params));
4719
4720 if (info->attrs[NL80211_ATTR_MAC])
4721 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4722
4723 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4724 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4725 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4726 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4727 return -EINVAL;
4728
4729 if (!rdev->ops->del_station)
4730 return -EOPNOTSUPP;
4731
4732 if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4733 params.subtype =
4734 nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4735 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4736 params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4737 return -EINVAL;
4738 } else {
4739 /* Default to Deauthentication frame */
4740 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4741 }
4742
4743 if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4744 params.reason_code =
4745 nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4746 if (params.reason_code == 0)
4747 return -EINVAL; /* 0 is reserved */
4748 } else {
4749 /* Default to reason code 2 */
4750 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4751 }
4752
4753 return rdev_del_station(rdev, dev, ¶ms);
4754 }
4755
4756 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4757 int flags, struct net_device *dev,
4758 u8 *dst, u8 *next_hop,
4759 struct mpath_info *pinfo)
4760 {
4761 void *hdr;
4762 struct nlattr *pinfoattr;
4763
4764 hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4765 if (!hdr)
4766 return -1;
4767
4768 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4769 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4770 nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4771 nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4772 goto nla_put_failure;
4773
4774 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4775 if (!pinfoattr)
4776 goto nla_put_failure;
4777 if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4778 nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4779 pinfo->frame_qlen))
4780 goto nla_put_failure;
4781 if (((pinfo->filled & MPATH_INFO_SN) &&
4782 nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4783 ((pinfo->filled & MPATH_INFO_METRIC) &&
4784 nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4785 pinfo->metric)) ||
4786 ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4787 nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4788 pinfo->exptime)) ||
4789 ((pinfo->filled & MPATH_INFO_FLAGS) &&
4790 nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4791 pinfo->flags)) ||
4792 ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4793 nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4794 pinfo->discovery_timeout)) ||
4795 ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4796 nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4797 pinfo->discovery_retries)))
4798 goto nla_put_failure;
4799
4800 nla_nest_end(msg, pinfoattr);
4801
4802 genlmsg_end(msg, hdr);
4803 return 0;
4804
4805 nla_put_failure:
4806 genlmsg_cancel(msg, hdr);
4807 return -EMSGSIZE;
4808 }
4809
4810 static int nl80211_dump_mpath(struct sk_buff *skb,
4811 struct netlink_callback *cb)
4812 {
4813 struct mpath_info pinfo;
4814 struct cfg80211_registered_device *rdev;
4815 struct wireless_dev *wdev;
4816 u8 dst[ETH_ALEN];
4817 u8 next_hop[ETH_ALEN];
4818 int path_idx = cb->args[2];
4819 int err;
4820
4821 err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4822 if (err)
4823 return err;
4824
4825 if (!rdev->ops->dump_mpath) {
4826 err = -EOPNOTSUPP;
4827 goto out_err;
4828 }
4829
4830 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4831 err = -EOPNOTSUPP;
4832 goto out_err;
4833 }
4834
4835 while (1) {
4836 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4837 next_hop, &pinfo);
4838 if (err == -ENOENT)
4839 break;
4840 if (err)
4841 goto out_err;
4842
4843 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4844 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4845 wdev->netdev, dst, next_hop,
4846 &pinfo) < 0)
4847 goto out;
4848
4849 path_idx++;
4850 }
4851
4852 out:
4853 cb->args[2] = path_idx;
4854 err = skb->len;
4855 out_err:
4856 nl80211_finish_wdev_dump(rdev);
4857 return err;
4858 }
4859
4860 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4861 {
4862 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4863 int err;
4864 struct net_device *dev = info->user_ptr[1];
4865 struct mpath_info pinfo;
4866 struct sk_buff *msg;
4867 u8 *dst = NULL;
4868 u8 next_hop[ETH_ALEN];
4869
4870 memset(&pinfo, 0, sizeof(pinfo));
4871
4872 if (!info->attrs[NL80211_ATTR_MAC])
4873 return -EINVAL;
4874
4875 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4876
4877 if (!rdev->ops->get_mpath)
4878 return -EOPNOTSUPP;
4879
4880 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4881 return -EOPNOTSUPP;
4882
4883 err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4884 if (err)
4885 return err;
4886
4887 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4888 if (!msg)
4889 return -ENOMEM;
4890
4891 if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4892 dev, dst, next_hop, &pinfo) < 0) {
4893 nlmsg_free(msg);
4894 return -ENOBUFS;
4895 }
4896
4897 return genlmsg_reply(msg, info);
4898 }
4899
4900 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4901 {
4902 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4903 struct net_device *dev = info->user_ptr[1];
4904 u8 *dst = NULL;
4905 u8 *next_hop = NULL;
4906
4907 if (!info->attrs[NL80211_ATTR_MAC])
4908 return -EINVAL;
4909
4910 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4911 return -EINVAL;
4912
4913 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4914 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4915
4916 if (!rdev->ops->change_mpath)
4917 return -EOPNOTSUPP;
4918
4919 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4920 return -EOPNOTSUPP;
4921
4922 return rdev_change_mpath(rdev, dev, dst, next_hop);
4923 }
4924
4925 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4926 {
4927 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4928 struct net_device *dev = info->user_ptr[1];
4929 u8 *dst = NULL;
4930 u8 *next_hop = NULL;
4931
4932 if (!info->attrs[NL80211_ATTR_MAC])
4933 return -EINVAL;
4934
4935 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4936 return -EINVAL;
4937
4938 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4939 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4940
4941 if (!rdev->ops->add_mpath)
4942 return -EOPNOTSUPP;
4943
4944 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4945 return -EOPNOTSUPP;
4946
4947 return rdev_add_mpath(rdev, dev, dst, next_hop);
4948 }
4949
4950 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4951 {
4952 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4953 struct net_device *dev = info->user_ptr[1];
4954 u8 *dst = NULL;
4955
4956 if (info->attrs[NL80211_ATTR_MAC])
4957 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4958
4959 if (!rdev->ops->del_mpath)
4960 return -EOPNOTSUPP;
4961
4962 return rdev_del_mpath(rdev, dev, dst);
4963 }
4964
4965 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4966 {
4967 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4968 int err;
4969 struct net_device *dev = info->user_ptr[1];
4970 struct mpath_info pinfo;
4971 struct sk_buff *msg;
4972 u8 *dst = NULL;
4973 u8 mpp[ETH_ALEN];
4974
4975 memset(&pinfo, 0, sizeof(pinfo));
4976
4977 if (!info->attrs[NL80211_ATTR_MAC])
4978 return -EINVAL;
4979
4980 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4981
4982 if (!rdev->ops->get_mpp)
4983 return -EOPNOTSUPP;
4984
4985 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4986 return -EOPNOTSUPP;
4987
4988 err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4989 if (err)
4990 return err;
4991
4992 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4993 if (!msg)
4994 return -ENOMEM;
4995
4996 if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4997 dev, dst, mpp, &pinfo) < 0) {
4998 nlmsg_free(msg);
4999 return -ENOBUFS;
5000 }
5001
5002 return genlmsg_reply(msg, info);
5003 }
5004
5005 static int nl80211_dump_mpp(struct sk_buff *skb,
5006 struct netlink_callback *cb)
5007 {
5008 struct mpath_info pinfo;
5009 struct cfg80211_registered_device *rdev;
5010 struct wireless_dev *wdev;
5011 u8 dst[ETH_ALEN];
5012 u8 mpp[ETH_ALEN];
5013 int path_idx = cb->args[2];
5014 int err;
5015
5016 err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5017 if (err)
5018 return err;
5019
5020 if (!rdev->ops->dump_mpp) {
5021 err = -EOPNOTSUPP;
5022 goto out_err;
5023 }
5024
5025 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5026 err = -EOPNOTSUPP;
5027 goto out_err;
5028 }
5029
5030 while (1) {
5031 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5032 mpp, &pinfo);
5033 if (err == -ENOENT)
5034 break;
5035 if (err)
5036 goto out_err;
5037
5038 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5039 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5040 wdev->netdev, dst, mpp,
5041 &pinfo) < 0)
5042 goto out;
5043
5044 path_idx++;
5045 }
5046
5047 out:
5048 cb->args[2] = path_idx;
5049 err = skb->len;
5050 out_err:
5051 nl80211_finish_wdev_dump(rdev);
5052 return err;
5053 }
5054
5055 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5056 {
5057 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5058 struct net_device *dev = info->user_ptr[1];
5059 struct wireless_dev *wdev = dev->ieee80211_ptr;
5060 struct bss_parameters params;
5061 int err;
5062
5063 memset(¶ms, 0, sizeof(params));
5064 /* default to not changing parameters */
5065 params.use_cts_prot = -1;
5066 params.use_short_preamble = -1;
5067 params.use_short_slot_time = -1;
5068 params.ap_isolate = -1;
5069 params.ht_opmode = -1;
5070 params.p2p_ctwindow = -1;
5071 params.p2p_opp_ps = -1;
5072
5073 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5074 params.use_cts_prot =
5075 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5076 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5077 params.use_short_preamble =
5078 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5079 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5080 params.use_short_slot_time =
5081 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5082 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5083 params.basic_rates =
5084 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5085 params.basic_rates_len =
5086 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5087 }
5088 if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5089 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5090 if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5091 params.ht_opmode =
5092 nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5093
5094 if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5095 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5096 return -EINVAL;
5097 params.p2p_ctwindow =
5098 nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5099 if (params.p2p_ctwindow < 0)
5100 return -EINVAL;
5101 if (params.p2p_ctwindow != 0 &&
5102 !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5103 return -EINVAL;
5104 }
5105
5106 if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5107 u8 tmp;
5108
5109 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5110 return -EINVAL;
5111 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5112 if (tmp > 1)
5113 return -EINVAL;
5114 params.p2p_opp_ps = tmp;
5115 if (params.p2p_opp_ps &&
5116 !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5117 return -EINVAL;
5118 }
5119
5120 if (!rdev->ops->change_bss)
5121 return -EOPNOTSUPP;
5122
5123 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5124 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5125 return -EOPNOTSUPP;
5126
5127 wdev_lock(wdev);
5128 err = rdev_change_bss(rdev, dev, ¶ms);
5129 wdev_unlock(wdev);
5130
5131 return err;
5132 }
5133
5134 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5135 {
5136 char *data = NULL;
5137 bool is_indoor;
5138 enum nl80211_user_reg_hint_type user_reg_hint_type;
5139 u32 owner_nlportid;
5140
5141 /*
5142 * You should only get this when cfg80211 hasn't yet initialized
5143 * completely when built-in to the kernel right between the time
5144 * window between nl80211_init() and regulatory_init(), if that is
5145 * even possible.
5146 */
5147 if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5148 return -EINPROGRESS;
5149
5150 if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5151 user_reg_hint_type =
5152 nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5153 else
5154 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5155
5156 switch (user_reg_hint_type) {
5157 case NL80211_USER_REG_HINT_USER:
5158 case NL80211_USER_REG_HINT_CELL_BASE:
5159 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5160 return -EINVAL;
5161
5162 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5163 return regulatory_hint_user(data, user_reg_hint_type);
5164 case NL80211_USER_REG_HINT_INDOOR:
5165 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5166 owner_nlportid = info->snd_portid;
5167 is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5168 } else {
5169 owner_nlportid = 0;
5170 is_indoor = true;
5171 }
5172
5173 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5174 default:
5175 return -EINVAL;
5176 }
5177 }
5178
5179 static int nl80211_get_mesh_config(struct sk_buff *skb,
5180 struct genl_info *info)
5181 {
5182 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5183 struct net_device *dev = info->user_ptr[1];
5184 struct wireless_dev *wdev = dev->ieee80211_ptr;
5185 struct mesh_config cur_params;
5186 int err = 0;
5187 void *hdr;
5188 struct nlattr *pinfoattr;
5189 struct sk_buff *msg;
5190
5191 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5192 return -EOPNOTSUPP;
5193
5194 if (!rdev->ops->get_mesh_config)
5195 return -EOPNOTSUPP;
5196
5197 wdev_lock(wdev);
5198 /* If not connected, get default parameters */
5199 if (!wdev->mesh_id_len)
5200 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5201 else
5202 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5203 wdev_unlock(wdev);
5204
5205 if (err)
5206 return err;
5207
5208 /* Draw up a netlink message to send back */
5209 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5210 if (!msg)
5211 return -ENOMEM;
5212 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5213 NL80211_CMD_GET_MESH_CONFIG);
5214 if (!hdr)
5215 goto out;
5216 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5217 if (!pinfoattr)
5218 goto nla_put_failure;
5219 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5220 nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5221 cur_params.dot11MeshRetryTimeout) ||
5222 nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5223 cur_params.dot11MeshConfirmTimeout) ||
5224 nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5225 cur_params.dot11MeshHoldingTimeout) ||
5226 nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5227 cur_params.dot11MeshMaxPeerLinks) ||
5228 nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5229 cur_params.dot11MeshMaxRetries) ||
5230 nla_put_u8(msg, NL80211_MESHCONF_TTL,
5231 cur_params.dot11MeshTTL) ||
5232 nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5233 cur_params.element_ttl) ||
5234 nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5235 cur_params.auto_open_plinks) ||
5236 nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5237 cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5238 nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5239 cur_params.dot11MeshHWMPmaxPREQretries) ||
5240 nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5241 cur_params.path_refresh_time) ||
5242 nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5243 cur_params.min_discovery_timeout) ||
5244 nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5245 cur_params.dot11MeshHWMPactivePathTimeout) ||
5246 nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5247 cur_params.dot11MeshHWMPpreqMinInterval) ||
5248 nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5249 cur_params.dot11MeshHWMPperrMinInterval) ||
5250 nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5251 cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5252 nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5253 cur_params.dot11MeshHWMPRootMode) ||
5254 nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5255 cur_params.dot11MeshHWMPRannInterval) ||
5256 nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5257 cur_params.dot11MeshGateAnnouncementProtocol) ||
5258 nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5259 cur_params.dot11MeshForwarding) ||
5260 nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5261 cur_params.rssi_threshold) ||
5262 nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5263 cur_params.ht_opmode) ||
5264 nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5265 cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5266 nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5267 cur_params.dot11MeshHWMProotInterval) ||
5268 nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5269 cur_params.dot11MeshHWMPconfirmationInterval) ||
5270 nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5271 cur_params.power_mode) ||
5272 nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5273 cur_params.dot11MeshAwakeWindowDuration) ||
5274 nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5275 cur_params.plink_timeout))
5276 goto nla_put_failure;
5277 nla_nest_end(msg, pinfoattr);
5278 genlmsg_end(msg, hdr);
5279 return genlmsg_reply(msg, info);
5280
5281 nla_put_failure:
5282 genlmsg_cancel(msg, hdr);
5283 out:
5284 nlmsg_free(msg);
5285 return -ENOBUFS;
5286 }
5287
5288 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5289 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5290 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5291 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5292 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5293 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5294 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5295 [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5296 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5297 [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5298 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5299 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5300 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5301 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5302 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5303 [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5304 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5305 [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5306 [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5307 [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5308 [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5309 [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5310 [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5311 [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5312 [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5313 [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5314 [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5315 [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5316 [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5317 };
5318
5319 static const struct nla_policy
5320 nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5321 [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5322 [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5323 [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5324 [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5325 [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5326 [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5327 [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5328 .len = IEEE80211_MAX_DATA_LEN },
5329 [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5330 };
5331
5332 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5333 {
5334 u8 val = nla_get_u8(nla);
5335 if (val < min || val > max)
5336 return -EINVAL;
5337 *out = val;
5338 return 0;
5339 }
5340
5341 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5342 {
5343 u8 val = nla_get_u8(nla);
5344 if (val < min || val > max)
5345 return -EINVAL;
5346 *out = val;
5347 return 0;
5348 }
5349
5350 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5351 {
5352 u16 val = nla_get_u16(nla);
5353 if (val < min || val > max)
5354 return -EINVAL;
5355 *out = val;
5356 return 0;
5357 }
5358
5359 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5360 {
5361 u32 val = nla_get_u32(nla);
5362 if (val < min || val > max)
5363 return -EINVAL;
5364 *out = val;
5365 return 0;
5366 }
5367
5368 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5369 {
5370 s32 val = nla_get_s32(nla);
5371 if (val < min || val > max)
5372 return -EINVAL;
5373 *out = val;
5374 return 0;
5375 }
5376
5377 static int nl80211_parse_mesh_config(struct genl_info *info,
5378 struct mesh_config *cfg,
5379 u32 *mask_out)
5380 {
5381 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5382 u32 mask = 0;
5383 u16 ht_opmode;
5384
5385 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5386 do { \
5387 if (tb[attr]) { \
5388 if (fn(tb[attr], min, max, &cfg->param)) \
5389 return -EINVAL; \
5390 mask |= (1 << (attr - 1)); \
5391 } \
5392 } while (0)
5393
5394 if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5395 return -EINVAL;
5396 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5397 info->attrs[NL80211_ATTR_MESH_CONFIG],
5398 nl80211_meshconf_params_policy))
5399 return -EINVAL;
5400
5401 /* This makes sure that there aren't more than 32 mesh config
5402 * parameters (otherwise our bitfield scheme would not work.) */
5403 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5404
5405 /* Fill in the params struct */
5406 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5407 mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5408 nl80211_check_u16);
5409 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5410 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5411 nl80211_check_u16);
5412 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5413 mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5414 nl80211_check_u16);
5415 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5416 mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5417 nl80211_check_u16);
5418 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5419 mask, NL80211_MESHCONF_MAX_RETRIES,
5420 nl80211_check_u8);
5421 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5422 mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5423 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5424 mask, NL80211_MESHCONF_ELEMENT_TTL,
5425 nl80211_check_u8);
5426 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5427 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5428 nl80211_check_bool);
5429 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5430 1, 255, mask,
5431 NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5432 nl80211_check_u32);
5433 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5434 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5435 nl80211_check_u8);
5436 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5437 mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5438 nl80211_check_u32);
5439 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5440 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5441 nl80211_check_u16);
5442 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5443 1, 65535, mask,
5444 NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5445 nl80211_check_u32);
5446 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5447 1, 65535, mask,
5448 NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5449 nl80211_check_u16);
5450 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5451 1, 65535, mask,
5452 NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5453 nl80211_check_u16);
5454 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5455 dot11MeshHWMPnetDiameterTraversalTime,
5456 1, 65535, mask,
5457 NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5458 nl80211_check_u16);
5459 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5460 mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5461 nl80211_check_u8);
5462 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5463 mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5464 nl80211_check_u16);
5465 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5466 dot11MeshGateAnnouncementProtocol, 0, 1,
5467 mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5468 nl80211_check_bool);
5469 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5470 mask, NL80211_MESHCONF_FORWARDING,
5471 nl80211_check_bool);
5472 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5473 mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5474 nl80211_check_s32);
5475 /*
5476 * Check HT operation mode based on
5477 * IEEE 802.11 2012 8.4.2.59 HT Operation element.
5478 */
5479 if (tb[NL80211_MESHCONF_HT_OPMODE]) {
5480 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
5481
5482 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
5483 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
5484 IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5485 return -EINVAL;
5486
5487 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
5488 (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5489 return -EINVAL;
5490
5491 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
5492 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
5493 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
5494 if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
5495 return -EINVAL;
5496 break;
5497 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
5498 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
5499 if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5500 return -EINVAL;
5501 break;
5502 }
5503 cfg->ht_opmode = ht_opmode;
5504 }
5505 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5506 1, 65535, mask,
5507 NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5508 nl80211_check_u32);
5509 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5510 mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5511 nl80211_check_u16);
5512 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5513 dot11MeshHWMPconfirmationInterval,
5514 1, 65535, mask,
5515 NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5516 nl80211_check_u16);
5517 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5518 NL80211_MESH_POWER_ACTIVE,
5519 NL80211_MESH_POWER_MAX,
5520 mask, NL80211_MESHCONF_POWER_MODE,
5521 nl80211_check_u32);
5522 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5523 0, 65535, mask,
5524 NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
5525 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5526 mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5527 nl80211_check_u32);
5528 if (mask_out)
5529 *mask_out = mask;
5530
5531 return 0;
5532
5533 #undef FILL_IN_MESH_PARAM_IF_SET
5534 }
5535
5536 static int nl80211_parse_mesh_setup(struct genl_info *info,
5537 struct mesh_setup *setup)
5538 {
5539 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5540 struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5541
5542 if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5543 return -EINVAL;
5544 if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5545 info->attrs[NL80211_ATTR_MESH_SETUP],
5546 nl80211_mesh_setup_params_policy))
5547 return -EINVAL;
5548
5549 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5550 setup->sync_method =
5551 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5552 IEEE80211_SYNC_METHOD_VENDOR :
5553 IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5554
5555 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5556 setup->path_sel_proto =
5557 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5558 IEEE80211_PATH_PROTOCOL_VENDOR :
5559 IEEE80211_PATH_PROTOCOL_HWMP;
5560
5561 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5562 setup->path_metric =
5563 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5564 IEEE80211_PATH_METRIC_VENDOR :
5565 IEEE80211_PATH_METRIC_AIRTIME;
5566
5567 if (tb[NL80211_MESH_SETUP_IE]) {
5568 struct nlattr *ieattr =
5569 tb[NL80211_MESH_SETUP_IE];
5570 if (!is_valid_ie_attr(ieattr))
5571 return -EINVAL;
5572 setup->ie = nla_data(ieattr);
5573 setup->ie_len = nla_len(ieattr);
5574 }
5575 if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5576 !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5577 return -EINVAL;
5578 setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5579 setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5580 setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5581 if (setup->is_secure)
5582 setup->user_mpm = true;
5583
5584 if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5585 if (!setup->user_mpm)
5586 return -EINVAL;
5587 setup->auth_id =
5588 nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5589 }
5590
5591 return 0;
5592 }
5593
5594 static int nl80211_update_mesh_config(struct sk_buff *skb,
5595 struct genl_info *info)
5596 {
5597 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5598 struct net_device *dev = info->user_ptr[1];
5599 struct wireless_dev *wdev = dev->ieee80211_ptr;
5600 struct mesh_config cfg;
5601 u32 mask;
5602 int err;
5603
5604 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5605 return -EOPNOTSUPP;
5606
5607 if (!rdev->ops->update_mesh_config)
5608 return -EOPNOTSUPP;
5609
5610 err = nl80211_parse_mesh_config(info, &cfg, &mask);
5611 if (err)
5612 return err;
5613
5614 wdev_lock(wdev);
5615 if (!wdev->mesh_id_len)
5616 err = -ENOLINK;
5617
5618 if (!err)
5619 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5620
5621 wdev_unlock(wdev);
5622
5623 return err;
5624 }
5625
5626 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5627 struct sk_buff *msg)
5628 {
5629 struct nlattr *nl_reg_rules;
5630 unsigned int i;
5631
5632 if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5633 (regdom->dfs_region &&
5634 nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5635 goto nla_put_failure;
5636
5637 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5638 if (!nl_reg_rules)
5639 goto nla_put_failure;
5640
5641 for (i = 0; i < regdom->n_reg_rules; i++) {
5642 struct nlattr *nl_reg_rule;
5643 const struct ieee80211_reg_rule *reg_rule;
5644 const struct ieee80211_freq_range *freq_range;
5645 const struct ieee80211_power_rule *power_rule;
5646 unsigned int max_bandwidth_khz;
5647
5648 reg_rule = ®dom->reg_rules[i];
5649 freq_range = ®_rule->freq_range;
5650 power_rule = ®_rule->power_rule;
5651
5652 nl_reg_rule = nla_nest_start(msg, i);
5653 if (!nl_reg_rule)
5654 goto nla_put_failure;
5655
5656 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5657 if (!max_bandwidth_khz)
5658 max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5659 reg_rule);
5660
5661 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5662 reg_rule->flags) ||
5663 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5664 freq_range->start_freq_khz) ||
5665 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5666 freq_range->end_freq_khz) ||
5667 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5668 max_bandwidth_khz) ||
5669 nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5670 power_rule->max_antenna_gain) ||
5671 nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5672 power_rule->max_eirp) ||
5673 nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5674 reg_rule->dfs_cac_ms))
5675 goto nla_put_failure;
5676
5677 nla_nest_end(msg, nl_reg_rule);
5678 }
5679
5680 nla_nest_end(msg, nl_reg_rules);
5681 return 0;
5682
5683 nla_put_failure:
5684 return -EMSGSIZE;
5685 }
5686
5687 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5688 {
5689 const struct ieee80211_regdomain *regdom = NULL;
5690 struct cfg80211_registered_device *rdev;
5691 struct wiphy *wiphy = NULL;
5692 struct sk_buff *msg;
5693 void *hdr;
5694
5695 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5696 if (!msg)
5697 return -ENOBUFS;
5698
5699 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5700 NL80211_CMD_GET_REG);
5701 if (!hdr)
5702 goto put_failure;
5703
5704 if (info->attrs[NL80211_ATTR_WIPHY]) {
5705 bool self_managed;
5706
5707 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5708 if (IS_ERR(rdev)) {
5709 nlmsg_free(msg);
5710 return PTR_ERR(rdev);
5711 }
5712
5713 wiphy = &rdev->wiphy;
5714 self_managed = wiphy->regulatory_flags &
5715 REGULATORY_WIPHY_SELF_MANAGED;
5716 regdom = get_wiphy_regdom(wiphy);
5717
5718 /* a self-managed-reg device must have a private regdom */
5719 if (WARN_ON(!regdom && self_managed)) {
5720 nlmsg_free(msg);
5721 return -EINVAL;
5722 }
5723
5724 if (regdom &&
5725 nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5726 goto nla_put_failure;
5727 }
5728
5729 if (!wiphy && reg_last_request_cell_base() &&
5730 nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5731 NL80211_USER_REG_HINT_CELL_BASE))
5732 goto nla_put_failure;
5733
5734 rcu_read_lock();
5735
5736 if (!regdom)
5737 regdom = rcu_dereference(cfg80211_regdomain);
5738
5739 if (nl80211_put_regdom(regdom, msg))
5740 goto nla_put_failure_rcu;
5741
5742 rcu_read_unlock();
5743
5744 genlmsg_end(msg, hdr);
5745 return genlmsg_reply(msg, info);
5746
5747 nla_put_failure_rcu:
5748 rcu_read_unlock();
5749 nla_put_failure:
5750 genlmsg_cancel(msg, hdr);
5751 put_failure:
5752 nlmsg_free(msg);
5753 return -EMSGSIZE;
5754 }
5755
5756 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5757 u32 seq, int flags, struct wiphy *wiphy,
5758 const struct ieee80211_regdomain *regdom)
5759 {
5760 void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5761 NL80211_CMD_GET_REG);
5762
5763 if (!hdr)
5764 return -1;
5765
5766 genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5767
5768 if (nl80211_put_regdom(regdom, msg))
5769 goto nla_put_failure;
5770
5771 if (!wiphy && reg_last_request_cell_base() &&
5772 nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5773 NL80211_USER_REG_HINT_CELL_BASE))
5774 goto nla_put_failure;
5775
5776 if (wiphy &&
5777 nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5778 goto nla_put_failure;
5779
5780 if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5781 nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5782 goto nla_put_failure;
5783
5784 genlmsg_end(msg, hdr);
5785 return 0;
5786
5787 nla_put_failure:
5788 genlmsg_cancel(msg, hdr);
5789 return -EMSGSIZE;
5790 }
5791
5792 static int nl80211_get_reg_dump(struct sk_buff *skb,
5793 struct netlink_callback *cb)
5794 {
5795 const struct ieee80211_regdomain *regdom = NULL;
5796 struct cfg80211_registered_device *rdev;
5797 int err, reg_idx, start = cb->args[2];
5798
5799 rtnl_lock();
5800
5801 if (cfg80211_regdomain && start == 0) {
5802 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5803 NLM_F_MULTI, NULL,
5804 rtnl_dereference(cfg80211_regdomain));
5805 if (err < 0)
5806 goto out_err;
5807 }
5808
5809 /* the global regdom is idx 0 */
5810 reg_idx = 1;
5811 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5812 regdom = get_wiphy_regdom(&rdev->wiphy);
5813 if (!regdom)
5814 continue;
5815
5816 if (++reg_idx <= start)
5817 continue;
5818
5819 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5820 NLM_F_MULTI, &rdev->wiphy, regdom);
5821 if (err < 0) {
5822 reg_idx--;
5823 break;
5824 }
5825 }
5826
5827 cb->args[2] = reg_idx;
5828 err = skb->len;
5829 out_err:
5830 rtnl_unlock();
5831 return err;
5832 }
5833
5834 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5835 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5836 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
5837 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
5838 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
5839 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
5840 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
5841 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
5842 [NL80211_ATTR_DFS_CAC_TIME] = { .type = NLA_U32 },
5843 };
5844
5845 static int parse_reg_rule(struct nlattr *tb[],
5846 struct ieee80211_reg_rule *reg_rule)
5847 {
5848 struct ieee80211_freq_range *freq_range = ®_rule->freq_range;
5849 struct ieee80211_power_rule *power_rule = ®_rule->power_rule;
5850
5851 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5852 return -EINVAL;
5853 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5854 return -EINVAL;
5855 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5856 return -EINVAL;
5857 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5858 return -EINVAL;
5859 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5860 return -EINVAL;
5861
5862 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5863
5864 freq_range->start_freq_khz =
5865 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5866 freq_range->end_freq_khz =
5867 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5868 freq_range->max_bandwidth_khz =
5869 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5870
5871 power_rule->max_eirp =
5872 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5873
5874 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5875 power_rule->max_antenna_gain =
5876 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5877
5878 if (tb[NL80211_ATTR_DFS_CAC_TIME])
5879 reg_rule->dfs_cac_ms =
5880 nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5881
5882 return 0;
5883 }
5884
5885 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5886 {
5887 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5888 struct nlattr *nl_reg_rule;
5889 char *alpha2;
5890 int rem_reg_rules, r;
5891 u32 num_rules = 0, rule_idx = 0, size_of_regd;
5892 enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5893 struct ieee80211_regdomain *rd;
5894
5895 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5896 return -EINVAL;
5897
5898 if (!info->attrs[NL80211_ATTR_REG_RULES])
5899 return -EINVAL;
5900
5901 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5902
5903 if (info->attrs[NL80211_ATTR_DFS_REGION])
5904 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5905
5906 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5907 rem_reg_rules) {
5908 num_rules++;
5909 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5910 return -EINVAL;
5911 }
5912
5913 if (!reg_is_valid_request(alpha2))
5914 return -EINVAL;
5915
5916 size_of_regd = sizeof(struct ieee80211_regdomain) +
5917 num_rules * sizeof(struct ieee80211_reg_rule);
5918
5919 rd = kzalloc(size_of_regd, GFP_KERNEL);
5920 if (!rd)
5921 return -ENOMEM;
5922
5923 rd->n_reg_rules = num_rules;
5924 rd->alpha2[0] = alpha2[0];
5925 rd->alpha2[1] = alpha2[1];
5926
5927 /*
5928 * Disable DFS master mode if the DFS region was
5929 * not supported or known on this kernel.
5930 */
5931 if (reg_supported_dfs_region(dfs_region))
5932 rd->dfs_region = dfs_region;
5933
5934 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5935 rem_reg_rules) {
5936 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5937 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5938 reg_rule_policy);
5939 if (r)
5940 goto bad_reg;
5941 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5942 if (r)
5943 goto bad_reg;
5944
5945 rule_idx++;
5946
5947 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5948 r = -EINVAL;
5949 goto bad_reg;
5950 }
5951 }
5952
5953 /* set_regdom takes ownership of rd */
5954 return set_regdom(rd, REGD_SOURCE_CRDA);
5955 bad_reg:
5956 kfree(rd);
5957 return r;
5958 }
5959 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5960
5961 static int validate_scan_freqs(struct nlattr *freqs)
5962 {
5963 struct nlattr *attr1, *attr2;
5964 int n_channels = 0, tmp1, tmp2;
5965
5966 nla_for_each_nested(attr1, freqs, tmp1) {
5967 n_channels++;
5968 /*
5969 * Some hardware has a limited channel list for
5970 * scanning, and it is pretty much nonsensical
5971 * to scan for a channel twice, so disallow that
5972 * and don't require drivers to check that the
5973 * channel list they get isn't longer than what
5974 * they can scan, as long as they can scan all
5975 * the channels they registered at once.
5976 */
5977 nla_for_each_nested(attr2, freqs, tmp2)
5978 if (attr1 != attr2 &&
5979 nla_get_u32(attr1) == nla_get_u32(attr2))
5980 return 0;
5981 }
5982
5983 return n_channels;
5984 }
5985
5986 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
5987 {
5988 return b < NUM_NL80211_BANDS && wiphy->bands[b];
5989 }
5990
5991 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
5992 struct cfg80211_bss_selection *bss_select)
5993 {
5994 struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
5995 struct nlattr *nest;
5996 int err;
5997 bool found = false;
5998 int i;
5999
6000 /* only process one nested attribute */
6001 nest = nla_data(nla);
6002 if (!nla_ok(nest, nla_len(nest)))
6003 return -EINVAL;
6004
6005 err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
6006 nla_len(nest), nl80211_bss_select_policy);
6007 if (err)
6008 return err;
6009
6010 /* only one attribute may be given */
6011 for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
6012 if (attr[i]) {
6013 if (found)
6014 return -EINVAL;
6015 found = true;
6016 }
6017 }
6018
6019 bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
6020
6021 if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6022 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6023
6024 if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6025 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6026 bss_select->param.band_pref =
6027 nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6028 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6029 return -EINVAL;
6030 }
6031
6032 if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6033 struct nl80211_bss_select_rssi_adjust *adj_param;
6034
6035 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6036 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6037 bss_select->param.adjust.band = adj_param->band;
6038 bss_select->param.adjust.delta = adj_param->delta;
6039 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6040 return -EINVAL;
6041 }
6042
6043 /* user-space did not provide behaviour attribute */
6044 if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6045 return -EINVAL;
6046
6047 if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6048 return -EINVAL;
6049
6050 return 0;
6051 }
6052
6053 static int nl80211_parse_random_mac(struct nlattr **attrs,
6054 u8 *mac_addr, u8 *mac_addr_mask)
6055 {
6056 int i;
6057
6058 if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6059 eth_zero_addr(mac_addr);
6060 eth_zero_addr(mac_addr_mask);
6061 mac_addr[0] = 0x2;
6062 mac_addr_mask[0] = 0x3;
6063
6064 return 0;
6065 }
6066
6067 /* need both or none */
6068 if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6069 return -EINVAL;
6070
6071 memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6072 memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6073
6074 /* don't allow or configure an mcast address */
6075 if (!is_multicast_ether_addr(mac_addr_mask) ||
6076 is_multicast_ether_addr(mac_addr))
6077 return -EINVAL;
6078
6079 /*
6080 * allow users to pass a MAC address that has bits set outside
6081 * of the mask, but don't bother drivers with having to deal
6082 * with such bits
6083 */
6084 for (i = 0; i < ETH_ALEN; i++)
6085 mac_addr[i] &= mac_addr_mask[i];
6086
6087 return 0;
6088 }
6089
6090 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6091 {
6092 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6093 struct wireless_dev *wdev = info->user_ptr[1];
6094 struct cfg80211_scan_request *request;
6095 struct nlattr *attr;
6096 struct wiphy *wiphy;
6097 int err, tmp, n_ssids = 0, n_channels, i;
6098 size_t ie_len;
6099
6100 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6101 return -EINVAL;
6102
6103 wiphy = &rdev->wiphy;
6104
6105 if (!rdev->ops->scan)
6106 return -EOPNOTSUPP;
6107
6108 if (rdev->scan_req || rdev->scan_msg) {
6109 err = -EBUSY;
6110 goto unlock;
6111 }
6112
6113 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6114 n_channels = validate_scan_freqs(
6115 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6116 if (!n_channels) {
6117 err = -EINVAL;
6118 goto unlock;
6119 }
6120 } else {
6121 n_channels = ieee80211_get_num_supported_channels(wiphy);
6122 }
6123
6124 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6125 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6126 n_ssids++;
6127
6128 if (n_ssids > wiphy->max_scan_ssids) {
6129 err = -EINVAL;
6130 goto unlock;
6131 }
6132
6133 if (info->attrs[NL80211_ATTR_IE])
6134 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6135 else
6136 ie_len = 0;
6137
6138 if (ie_len > wiphy->max_scan_ie_len) {
6139 err = -EINVAL;
6140 goto unlock;
6141 }
6142
6143 request = kzalloc(sizeof(*request)
6144 + sizeof(*request->ssids) * n_ssids
6145 + sizeof(*request->channels) * n_channels
6146 + ie_len, GFP_KERNEL);
6147 if (!request) {
6148 err = -ENOMEM;
6149 goto unlock;
6150 }
6151
6152 if (n_ssids)
6153 request->ssids = (void *)&request->channels[n_channels];
6154 request->n_ssids = n_ssids;
6155 if (ie_len) {
6156 if (n_ssids)
6157 request->ie = (void *)(request->ssids + n_ssids);
6158 else
6159 request->ie = (void *)(request->channels + n_channels);
6160 }
6161
6162 i = 0;
6163 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6164 /* user specified, bail out if channel not found */
6165 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6166 struct ieee80211_channel *chan;
6167
6168 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6169
6170 if (!chan) {
6171 err = -EINVAL;
6172 goto out_free;
6173 }
6174
6175 /* ignore disabled channels */
6176 if (chan->flags & IEEE80211_CHAN_DISABLED)
6177 continue;
6178
6179 request->channels[i] = chan;
6180 i++;
6181 }
6182 } else {
6183 enum nl80211_band band;
6184
6185 /* all channels */
6186 for (band = 0; band < NUM_NL80211_BANDS; band++) {