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789d0c7b287ef1ea288c1590a76044d9931d8ec8
[deliverable/linux.git] / net / wireless / nl80211.c
1 /*
2 * This is the new netlink-based wireless configuration interface.
3 *
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 */
6
7 #include <linux/if.h>
8 #include <linux/module.h>
9 #include <linux/err.h>
10 #include <linux/slab.h>
11 #include <linux/list.h>
12 #include <linux/if_ether.h>
13 #include <linux/ieee80211.h>
14 #include <linux/nl80211.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/netlink.h>
17 #include <linux/etherdevice.h>
18 #include <net/net_namespace.h>
19 #include <net/genetlink.h>
20 #include <net/cfg80211.h>
21 #include <net/sock.h>
22 #include "core.h"
23 #include "nl80211.h"
24 #include "reg.h"
25
26 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
28 struct genl_info *info,
29 struct cfg80211_crypto_settings *settings,
30 int cipher_limit);
31
32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
33 struct genl_info *info);
34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
35 struct genl_info *info);
36
37 /* the netlink family */
38 static struct genl_family nl80211_fam = {
39 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
40 .name = "nl80211", /* have users key off the name instead */
41 .hdrsize = 0, /* no private header */
42 .version = 1, /* no particular meaning now */
43 .maxattr = NL80211_ATTR_MAX,
44 .netnsok = true,
45 .pre_doit = nl80211_pre_doit,
46 .post_doit = nl80211_post_doit,
47 };
48
49 /* returns ERR_PTR values */
50 static struct wireless_dev *
51 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
52 {
53 struct cfg80211_registered_device *rdev;
54 struct wireless_dev *result = NULL;
55 bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
56 bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
57 u64 wdev_id;
58 int wiphy_idx = -1;
59 int ifidx = -1;
60
61 assert_cfg80211_lock();
62
63 if (!have_ifidx && !have_wdev_id)
64 return ERR_PTR(-EINVAL);
65
66 if (have_ifidx)
67 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
68 if (have_wdev_id) {
69 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
70 wiphy_idx = wdev_id >> 32;
71 }
72
73 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
74 struct wireless_dev *wdev;
75
76 if (wiphy_net(&rdev->wiphy) != netns)
77 continue;
78
79 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
80 continue;
81
82 mutex_lock(&rdev->devlist_mtx);
83 list_for_each_entry(wdev, &rdev->wdev_list, list) {
84 if (have_ifidx && wdev->netdev &&
85 wdev->netdev->ifindex == ifidx) {
86 result = wdev;
87 break;
88 }
89 if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
90 result = wdev;
91 break;
92 }
93 }
94 mutex_unlock(&rdev->devlist_mtx);
95
96 if (result)
97 break;
98 }
99
100 if (result)
101 return result;
102 return ERR_PTR(-ENODEV);
103 }
104
105 static struct cfg80211_registered_device *
106 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
107 {
108 struct cfg80211_registered_device *rdev = NULL, *tmp;
109 struct net_device *netdev;
110
111 assert_cfg80211_lock();
112
113 if (!attrs[NL80211_ATTR_WIPHY] &&
114 !attrs[NL80211_ATTR_IFINDEX] &&
115 !attrs[NL80211_ATTR_WDEV])
116 return ERR_PTR(-EINVAL);
117
118 if (attrs[NL80211_ATTR_WIPHY])
119 rdev = cfg80211_rdev_by_wiphy_idx(
120 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
121
122 if (attrs[NL80211_ATTR_WDEV]) {
123 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
124 struct wireless_dev *wdev;
125 bool found = false;
126
127 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
128 if (tmp) {
129 /* make sure wdev exists */
130 mutex_lock(&tmp->devlist_mtx);
131 list_for_each_entry(wdev, &tmp->wdev_list, list) {
132 if (wdev->identifier != (u32)wdev_id)
133 continue;
134 found = true;
135 break;
136 }
137 mutex_unlock(&tmp->devlist_mtx);
138
139 if (!found)
140 tmp = NULL;
141
142 if (rdev && tmp != rdev)
143 return ERR_PTR(-EINVAL);
144 rdev = tmp;
145 }
146 }
147
148 if (attrs[NL80211_ATTR_IFINDEX]) {
149 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
150 netdev = dev_get_by_index(netns, ifindex);
151 if (netdev) {
152 if (netdev->ieee80211_ptr)
153 tmp = wiphy_to_dev(
154 netdev->ieee80211_ptr->wiphy);
155 else
156 tmp = NULL;
157
158 dev_put(netdev);
159
160 /* not wireless device -- return error */
161 if (!tmp)
162 return ERR_PTR(-EINVAL);
163
164 /* mismatch -- return error */
165 if (rdev && tmp != rdev)
166 return ERR_PTR(-EINVAL);
167
168 rdev = tmp;
169 }
170 }
171
172 if (!rdev)
173 return ERR_PTR(-ENODEV);
174
175 if (netns != wiphy_net(&rdev->wiphy))
176 return ERR_PTR(-ENODEV);
177
178 return rdev;
179 }
180
181 /*
182 * This function returns a pointer to the driver
183 * that the genl_info item that is passed refers to.
184 * If successful, it returns non-NULL and also locks
185 * the driver's mutex!
186 *
187 * This means that you need to call cfg80211_unlock_rdev()
188 * before being allowed to acquire &cfg80211_mutex!
189 *
190 * This is necessary because we need to lock the global
191 * mutex to get an item off the list safely, and then
192 * we lock the rdev mutex so it doesn't go away under us.
193 *
194 * We don't want to keep cfg80211_mutex locked
195 * for all the time in order to allow requests on
196 * other interfaces to go through at the same time.
197 *
198 * The result of this can be a PTR_ERR and hence must
199 * be checked with IS_ERR() for errors.
200 */
201 static struct cfg80211_registered_device *
202 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
203 {
204 struct cfg80211_registered_device *rdev;
205
206 mutex_lock(&cfg80211_mutex);
207 rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
208
209 /* if it is not an error we grab the lock on
210 * it to assure it won't be going away while
211 * we operate on it */
212 if (!IS_ERR(rdev))
213 mutex_lock(&rdev->mtx);
214
215 mutex_unlock(&cfg80211_mutex);
216
217 return rdev;
218 }
219
220 /* policy for the attributes */
221 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
222 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
223 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
224 .len = 20-1 },
225 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
226 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
227 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
228 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
229 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
230 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
231 [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
232 [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
233
234 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
235 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
236 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
237
238 [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
239 [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
240
241 [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
242 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
243 .len = WLAN_MAX_KEY_LEN },
244 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
245 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
246 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
247 [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
248 [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
249
250 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
251 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
252 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
253 .len = IEEE80211_MAX_DATA_LEN },
254 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
255 .len = IEEE80211_MAX_DATA_LEN },
256 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
257 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
258 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
259 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
260 .len = NL80211_MAX_SUPP_RATES },
261 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
262 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
263 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
264 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
265 .len = IEEE80211_MAX_MESH_ID_LEN },
266 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
267
268 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
269 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
270
271 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
272 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
273 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
274 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
275 .len = NL80211_MAX_SUPP_RATES },
276 [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
277
278 [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
279 [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
280
281 [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
282
283 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
284 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
285 .len = IEEE80211_MAX_DATA_LEN },
286 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
287 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
288
289 [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
290 .len = IEEE80211_MAX_SSID_LEN },
291 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
292 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
293 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
294 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
295 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
296 [NL80211_ATTR_STA_FLAGS2] = {
297 .len = sizeof(struct nl80211_sta_flag_update),
298 },
299 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
300 [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
301 [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
302 [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
303 [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
304 [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
305 [NL80211_ATTR_PID] = { .type = NLA_U32 },
306 [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
307 [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
308 .len = WLAN_PMKID_LEN },
309 [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
310 [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
311 [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
312 [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
313 .len = IEEE80211_MAX_DATA_LEN },
314 [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
315 [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
316 [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
317 [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
318 [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
319 [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
320 [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
321 [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
322 [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
323 [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
324 [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
325 [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
326 [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
327 [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
328 [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
329 [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
330 [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
331 [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
332 [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
333 [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
334 .len = IEEE80211_MAX_DATA_LEN },
335 [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
336 .len = IEEE80211_MAX_DATA_LEN },
337 [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
338 [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
339 [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
340 [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
341 [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
342 [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
343 [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
344 [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .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 };
358
359 /* policy for the key attributes */
360 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
361 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
362 [NL80211_KEY_IDX] = { .type = NLA_U8 },
363 [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
364 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
365 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
366 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
367 [NL80211_KEY_TYPE] = { .type = NLA_U32 },
368 [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
369 };
370
371 /* policy for the key default flags */
372 static const struct nla_policy
373 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
374 [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
375 [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
376 };
377
378 /* policy for WoWLAN attributes */
379 static const struct nla_policy
380 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
381 [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
382 [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
383 [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
384 [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
385 [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
386 [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
387 [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
388 [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
389 };
390
391 /* policy for GTK rekey offload attributes */
392 static const struct nla_policy
393 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
394 [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
395 [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
396 [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
397 };
398
399 static const struct nla_policy
400 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
401 [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
402 .len = IEEE80211_MAX_SSID_LEN },
403 [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
404 };
405
406 /* ifidx get helper */
407 static int nl80211_get_ifidx(struct netlink_callback *cb)
408 {
409 int res;
410
411 res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
412 nl80211_fam.attrbuf, nl80211_fam.maxattr,
413 nl80211_policy);
414 if (res)
415 return res;
416
417 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
418 return -EINVAL;
419
420 res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
421 if (!res)
422 return -EINVAL;
423 return res;
424 }
425
426 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
427 struct netlink_callback *cb,
428 struct cfg80211_registered_device **rdev,
429 struct net_device **dev)
430 {
431 int ifidx = cb->args[0];
432 int err;
433
434 if (!ifidx)
435 ifidx = nl80211_get_ifidx(cb);
436 if (ifidx < 0)
437 return ifidx;
438
439 cb->args[0] = ifidx;
440
441 rtnl_lock();
442
443 *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
444 if (!*dev) {
445 err = -ENODEV;
446 goto out_rtnl;
447 }
448
449 *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
450 if (IS_ERR(*rdev)) {
451 err = PTR_ERR(*rdev);
452 goto out_rtnl;
453 }
454
455 return 0;
456 out_rtnl:
457 rtnl_unlock();
458 return err;
459 }
460
461 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
462 {
463 cfg80211_unlock_rdev(rdev);
464 rtnl_unlock();
465 }
466
467 /* IE validation */
468 static bool is_valid_ie_attr(const struct nlattr *attr)
469 {
470 const u8 *pos;
471 int len;
472
473 if (!attr)
474 return true;
475
476 pos = nla_data(attr);
477 len = nla_len(attr);
478
479 while (len) {
480 u8 elemlen;
481
482 if (len < 2)
483 return false;
484 len -= 2;
485
486 elemlen = pos[1];
487 if (elemlen > len)
488 return false;
489
490 len -= elemlen;
491 pos += 2 + elemlen;
492 }
493
494 return true;
495 }
496
497 /* message building helper */
498 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
499 int flags, u8 cmd)
500 {
501 /* since there is no private header just add the generic one */
502 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
503 }
504
505 static int nl80211_msg_put_channel(struct sk_buff *msg,
506 struct ieee80211_channel *chan)
507 {
508 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
509 chan->center_freq))
510 goto nla_put_failure;
511
512 if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
513 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
514 goto nla_put_failure;
515 if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
516 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
517 goto nla_put_failure;
518 if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
519 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
520 goto nla_put_failure;
521 if ((chan->flags & IEEE80211_CHAN_RADAR) &&
522 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
523 goto nla_put_failure;
524
525 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
526 DBM_TO_MBM(chan->max_power)))
527 goto nla_put_failure;
528
529 return 0;
530
531 nla_put_failure:
532 return -ENOBUFS;
533 }
534
535 /* netlink command implementations */
536
537 struct key_parse {
538 struct key_params p;
539 int idx;
540 int type;
541 bool def, defmgmt;
542 bool def_uni, def_multi;
543 };
544
545 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
546 {
547 struct nlattr *tb[NL80211_KEY_MAX + 1];
548 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
549 nl80211_key_policy);
550 if (err)
551 return err;
552
553 k->def = !!tb[NL80211_KEY_DEFAULT];
554 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
555
556 if (k->def) {
557 k->def_uni = true;
558 k->def_multi = true;
559 }
560 if (k->defmgmt)
561 k->def_multi = true;
562
563 if (tb[NL80211_KEY_IDX])
564 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
565
566 if (tb[NL80211_KEY_DATA]) {
567 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
568 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
569 }
570
571 if (tb[NL80211_KEY_SEQ]) {
572 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
573 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
574 }
575
576 if (tb[NL80211_KEY_CIPHER])
577 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
578
579 if (tb[NL80211_KEY_TYPE]) {
580 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
581 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
582 return -EINVAL;
583 }
584
585 if (tb[NL80211_KEY_DEFAULT_TYPES]) {
586 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
587 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
588 tb[NL80211_KEY_DEFAULT_TYPES],
589 nl80211_key_default_policy);
590 if (err)
591 return err;
592
593 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
594 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
595 }
596
597 return 0;
598 }
599
600 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
601 {
602 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
603 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
604 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
605 }
606
607 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
608 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
609 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
610 }
611
612 if (info->attrs[NL80211_ATTR_KEY_IDX])
613 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
614
615 if (info->attrs[NL80211_ATTR_KEY_CIPHER])
616 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
617
618 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
619 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
620
621 if (k->def) {
622 k->def_uni = true;
623 k->def_multi = true;
624 }
625 if (k->defmgmt)
626 k->def_multi = true;
627
628 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
629 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
630 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
631 return -EINVAL;
632 }
633
634 if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
635 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
636 int err = nla_parse_nested(
637 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
638 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
639 nl80211_key_default_policy);
640 if (err)
641 return err;
642
643 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
644 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
645 }
646
647 return 0;
648 }
649
650 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
651 {
652 int err;
653
654 memset(k, 0, sizeof(*k));
655 k->idx = -1;
656 k->type = -1;
657
658 if (info->attrs[NL80211_ATTR_KEY])
659 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
660 else
661 err = nl80211_parse_key_old(info, k);
662
663 if (err)
664 return err;
665
666 if (k->def && k->defmgmt)
667 return -EINVAL;
668
669 if (k->defmgmt) {
670 if (k->def_uni || !k->def_multi)
671 return -EINVAL;
672 }
673
674 if (k->idx != -1) {
675 if (k->defmgmt) {
676 if (k->idx < 4 || k->idx > 5)
677 return -EINVAL;
678 } else if (k->def) {
679 if (k->idx < 0 || k->idx > 3)
680 return -EINVAL;
681 } else {
682 if (k->idx < 0 || k->idx > 5)
683 return -EINVAL;
684 }
685 }
686
687 return 0;
688 }
689
690 static struct cfg80211_cached_keys *
691 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
692 struct nlattr *keys)
693 {
694 struct key_parse parse;
695 struct nlattr *key;
696 struct cfg80211_cached_keys *result;
697 int rem, err, def = 0;
698
699 result = kzalloc(sizeof(*result), GFP_KERNEL);
700 if (!result)
701 return ERR_PTR(-ENOMEM);
702
703 result->def = -1;
704 result->defmgmt = -1;
705
706 nla_for_each_nested(key, keys, rem) {
707 memset(&parse, 0, sizeof(parse));
708 parse.idx = -1;
709
710 err = nl80211_parse_key_new(key, &parse);
711 if (err)
712 goto error;
713 err = -EINVAL;
714 if (!parse.p.key)
715 goto error;
716 if (parse.idx < 0 || parse.idx > 4)
717 goto error;
718 if (parse.def) {
719 if (def)
720 goto error;
721 def = 1;
722 result->def = parse.idx;
723 if (!parse.def_uni || !parse.def_multi)
724 goto error;
725 } else if (parse.defmgmt)
726 goto error;
727 err = cfg80211_validate_key_settings(rdev, &parse.p,
728 parse.idx, false, NULL);
729 if (err)
730 goto error;
731 result->params[parse.idx].cipher = parse.p.cipher;
732 result->params[parse.idx].key_len = parse.p.key_len;
733 result->params[parse.idx].key = result->data[parse.idx];
734 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
735 }
736
737 return result;
738 error:
739 kfree(result);
740 return ERR_PTR(err);
741 }
742
743 static int nl80211_key_allowed(struct wireless_dev *wdev)
744 {
745 ASSERT_WDEV_LOCK(wdev);
746
747 switch (wdev->iftype) {
748 case NL80211_IFTYPE_AP:
749 case NL80211_IFTYPE_AP_VLAN:
750 case NL80211_IFTYPE_P2P_GO:
751 case NL80211_IFTYPE_MESH_POINT:
752 break;
753 case NL80211_IFTYPE_ADHOC:
754 if (!wdev->current_bss)
755 return -ENOLINK;
756 break;
757 case NL80211_IFTYPE_STATION:
758 case NL80211_IFTYPE_P2P_CLIENT:
759 if (wdev->sme_state != CFG80211_SME_CONNECTED)
760 return -ENOLINK;
761 break;
762 default:
763 return -EINVAL;
764 }
765
766 return 0;
767 }
768
769 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
770 {
771 struct nlattr *nl_modes = nla_nest_start(msg, attr);
772 int i;
773
774 if (!nl_modes)
775 goto nla_put_failure;
776
777 i = 0;
778 while (ifmodes) {
779 if ((ifmodes & 1) && nla_put_flag(msg, i))
780 goto nla_put_failure;
781 ifmodes >>= 1;
782 i++;
783 }
784
785 nla_nest_end(msg, nl_modes);
786 return 0;
787
788 nla_put_failure:
789 return -ENOBUFS;
790 }
791
792 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
793 struct sk_buff *msg)
794 {
795 struct nlattr *nl_combis;
796 int i, j;
797
798 nl_combis = nla_nest_start(msg,
799 NL80211_ATTR_INTERFACE_COMBINATIONS);
800 if (!nl_combis)
801 goto nla_put_failure;
802
803 for (i = 0; i < wiphy->n_iface_combinations; i++) {
804 const struct ieee80211_iface_combination *c;
805 struct nlattr *nl_combi, *nl_limits;
806
807 c = &wiphy->iface_combinations[i];
808
809 nl_combi = nla_nest_start(msg, i + 1);
810 if (!nl_combi)
811 goto nla_put_failure;
812
813 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
814 if (!nl_limits)
815 goto nla_put_failure;
816
817 for (j = 0; j < c->n_limits; j++) {
818 struct nlattr *nl_limit;
819
820 nl_limit = nla_nest_start(msg, j + 1);
821 if (!nl_limit)
822 goto nla_put_failure;
823 if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
824 c->limits[j].max))
825 goto nla_put_failure;
826 if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
827 c->limits[j].types))
828 goto nla_put_failure;
829 nla_nest_end(msg, nl_limit);
830 }
831
832 nla_nest_end(msg, nl_limits);
833
834 if (c->beacon_int_infra_match &&
835 nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
836 goto nla_put_failure;
837 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
838 c->num_different_channels) ||
839 nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
840 c->max_interfaces))
841 goto nla_put_failure;
842
843 nla_nest_end(msg, nl_combi);
844 }
845
846 nla_nest_end(msg, nl_combis);
847
848 return 0;
849 nla_put_failure:
850 return -ENOBUFS;
851 }
852
853 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
854 struct cfg80211_registered_device *dev)
855 {
856 void *hdr;
857 struct nlattr *nl_bands, *nl_band;
858 struct nlattr *nl_freqs, *nl_freq;
859 struct nlattr *nl_rates, *nl_rate;
860 struct nlattr *nl_cmds;
861 enum ieee80211_band band;
862 struct ieee80211_channel *chan;
863 struct ieee80211_rate *rate;
864 int i;
865 const struct ieee80211_txrx_stypes *mgmt_stypes =
866 dev->wiphy.mgmt_stypes;
867
868 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
869 if (!hdr)
870 return -1;
871
872 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
873 nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
874 nla_put_u32(msg, NL80211_ATTR_GENERATION,
875 cfg80211_rdev_list_generation) ||
876 nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
877 dev->wiphy.retry_short) ||
878 nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
879 dev->wiphy.retry_long) ||
880 nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
881 dev->wiphy.frag_threshold) ||
882 nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
883 dev->wiphy.rts_threshold) ||
884 nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
885 dev->wiphy.coverage_class) ||
886 nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
887 dev->wiphy.max_scan_ssids) ||
888 nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
889 dev->wiphy.max_sched_scan_ssids) ||
890 nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
891 dev->wiphy.max_scan_ie_len) ||
892 nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
893 dev->wiphy.max_sched_scan_ie_len) ||
894 nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
895 dev->wiphy.max_match_sets))
896 goto nla_put_failure;
897
898 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
899 nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
900 goto nla_put_failure;
901 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
902 nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
903 goto nla_put_failure;
904 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
905 nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
906 goto nla_put_failure;
907 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
908 nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
909 goto nla_put_failure;
910 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
911 nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
912 goto nla_put_failure;
913 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
914 nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
915 goto nla_put_failure;
916
917 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
918 sizeof(u32) * dev->wiphy.n_cipher_suites,
919 dev->wiphy.cipher_suites))
920 goto nla_put_failure;
921
922 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
923 dev->wiphy.max_num_pmkids))
924 goto nla_put_failure;
925
926 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
927 nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
928 goto nla_put_failure;
929
930 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
931 dev->wiphy.available_antennas_tx) ||
932 nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
933 dev->wiphy.available_antennas_rx))
934 goto nla_put_failure;
935
936 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
937 nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
938 dev->wiphy.probe_resp_offload))
939 goto nla_put_failure;
940
941 if ((dev->wiphy.available_antennas_tx ||
942 dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
943 u32 tx_ant = 0, rx_ant = 0;
944 int res;
945 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
946 if (!res) {
947 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
948 tx_ant) ||
949 nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
950 rx_ant))
951 goto nla_put_failure;
952 }
953 }
954
955 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
956 dev->wiphy.interface_modes))
957 goto nla_put_failure;
958
959 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
960 if (!nl_bands)
961 goto nla_put_failure;
962
963 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
964 if (!dev->wiphy.bands[band])
965 continue;
966
967 nl_band = nla_nest_start(msg, band);
968 if (!nl_band)
969 goto nla_put_failure;
970
971 /* add HT info */
972 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
973 (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
974 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
975 &dev->wiphy.bands[band]->ht_cap.mcs) ||
976 nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
977 dev->wiphy.bands[band]->ht_cap.cap) ||
978 nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
979 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
980 nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
981 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
982 goto nla_put_failure;
983
984 /* add VHT info */
985 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
986 (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
987 sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
988 &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
989 nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
990 dev->wiphy.bands[band]->vht_cap.cap)))
991 goto nla_put_failure;
992
993 /* add frequencies */
994 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
995 if (!nl_freqs)
996 goto nla_put_failure;
997
998 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
999 nl_freq = nla_nest_start(msg, i);
1000 if (!nl_freq)
1001 goto nla_put_failure;
1002
1003 chan = &dev->wiphy.bands[band]->channels[i];
1004
1005 if (nl80211_msg_put_channel(msg, chan))
1006 goto nla_put_failure;
1007
1008 nla_nest_end(msg, nl_freq);
1009 }
1010
1011 nla_nest_end(msg, nl_freqs);
1012
1013 /* add bitrates */
1014 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1015 if (!nl_rates)
1016 goto nla_put_failure;
1017
1018 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1019 nl_rate = nla_nest_start(msg, i);
1020 if (!nl_rate)
1021 goto nla_put_failure;
1022
1023 rate = &dev->wiphy.bands[band]->bitrates[i];
1024 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1025 rate->bitrate))
1026 goto nla_put_failure;
1027 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1028 nla_put_flag(msg,
1029 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1030 goto nla_put_failure;
1031
1032 nla_nest_end(msg, nl_rate);
1033 }
1034
1035 nla_nest_end(msg, nl_rates);
1036
1037 nla_nest_end(msg, nl_band);
1038 }
1039 nla_nest_end(msg, nl_bands);
1040
1041 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1042 if (!nl_cmds)
1043 goto nla_put_failure;
1044
1045 i = 0;
1046 #define CMD(op, n) \
1047 do { \
1048 if (dev->ops->op) { \
1049 i++; \
1050 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1051 goto nla_put_failure; \
1052 } \
1053 } while (0)
1054
1055 CMD(add_virtual_intf, NEW_INTERFACE);
1056 CMD(change_virtual_intf, SET_INTERFACE);
1057 CMD(add_key, NEW_KEY);
1058 CMD(start_ap, START_AP);
1059 CMD(add_station, NEW_STATION);
1060 CMD(add_mpath, NEW_MPATH);
1061 CMD(update_mesh_config, SET_MESH_CONFIG);
1062 CMD(change_bss, SET_BSS);
1063 CMD(auth, AUTHENTICATE);
1064 CMD(assoc, ASSOCIATE);
1065 CMD(deauth, DEAUTHENTICATE);
1066 CMD(disassoc, DISASSOCIATE);
1067 CMD(join_ibss, JOIN_IBSS);
1068 CMD(join_mesh, JOIN_MESH);
1069 CMD(set_pmksa, SET_PMKSA);
1070 CMD(del_pmksa, DEL_PMKSA);
1071 CMD(flush_pmksa, FLUSH_PMKSA);
1072 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1073 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1074 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1075 CMD(mgmt_tx, FRAME);
1076 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1077 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1078 i++;
1079 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1080 goto nla_put_failure;
1081 }
1082 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1083 dev->ops->join_mesh) {
1084 i++;
1085 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1086 goto nla_put_failure;
1087 }
1088 CMD(set_wds_peer, SET_WDS_PEER);
1089 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1090 CMD(tdls_mgmt, TDLS_MGMT);
1091 CMD(tdls_oper, TDLS_OPER);
1092 }
1093 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1094 CMD(sched_scan_start, START_SCHED_SCAN);
1095 CMD(probe_client, PROBE_CLIENT);
1096 CMD(set_noack_map, SET_NOACK_MAP);
1097 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1098 i++;
1099 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1100 goto nla_put_failure;
1101 }
1102
1103 #ifdef CONFIG_NL80211_TESTMODE
1104 CMD(testmode_cmd, TESTMODE);
1105 #endif
1106
1107 #undef CMD
1108
1109 if (dev->ops->connect || dev->ops->auth) {
1110 i++;
1111 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1112 goto nla_put_failure;
1113 }
1114
1115 if (dev->ops->disconnect || dev->ops->deauth) {
1116 i++;
1117 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1118 goto nla_put_failure;
1119 }
1120
1121 nla_nest_end(msg, nl_cmds);
1122
1123 if (dev->ops->remain_on_channel &&
1124 (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1125 nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1126 dev->wiphy.max_remain_on_channel_duration))
1127 goto nla_put_failure;
1128
1129 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1130 nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1131 goto nla_put_failure;
1132
1133 if (mgmt_stypes) {
1134 u16 stypes;
1135 struct nlattr *nl_ftypes, *nl_ifs;
1136 enum nl80211_iftype ift;
1137
1138 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1139 if (!nl_ifs)
1140 goto nla_put_failure;
1141
1142 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1143 nl_ftypes = nla_nest_start(msg, ift);
1144 if (!nl_ftypes)
1145 goto nla_put_failure;
1146 i = 0;
1147 stypes = mgmt_stypes[ift].tx;
1148 while (stypes) {
1149 if ((stypes & 1) &&
1150 nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1151 (i << 4) | IEEE80211_FTYPE_MGMT))
1152 goto nla_put_failure;
1153 stypes >>= 1;
1154 i++;
1155 }
1156 nla_nest_end(msg, nl_ftypes);
1157 }
1158
1159 nla_nest_end(msg, nl_ifs);
1160
1161 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1162 if (!nl_ifs)
1163 goto nla_put_failure;
1164
1165 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1166 nl_ftypes = nla_nest_start(msg, ift);
1167 if (!nl_ftypes)
1168 goto nla_put_failure;
1169 i = 0;
1170 stypes = mgmt_stypes[ift].rx;
1171 while (stypes) {
1172 if ((stypes & 1) &&
1173 nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1174 (i << 4) | IEEE80211_FTYPE_MGMT))
1175 goto nla_put_failure;
1176 stypes >>= 1;
1177 i++;
1178 }
1179 nla_nest_end(msg, nl_ftypes);
1180 }
1181 nla_nest_end(msg, nl_ifs);
1182 }
1183
1184 #ifdef CONFIG_PM
1185 if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1186 struct nlattr *nl_wowlan;
1187
1188 nl_wowlan = nla_nest_start(msg,
1189 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1190 if (!nl_wowlan)
1191 goto nla_put_failure;
1192
1193 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1194 nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1195 ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1196 nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1197 ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1198 nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1199 ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1200 nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1201 ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1202 nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1203 ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1204 nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1205 ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1206 nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1207 ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1208 nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1209 goto nla_put_failure;
1210 if (dev->wiphy.wowlan.n_patterns) {
1211 struct nl80211_wowlan_pattern_support pat = {
1212 .max_patterns = dev->wiphy.wowlan.n_patterns,
1213 .min_pattern_len =
1214 dev->wiphy.wowlan.pattern_min_len,
1215 .max_pattern_len =
1216 dev->wiphy.wowlan.pattern_max_len,
1217 };
1218 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1219 sizeof(pat), &pat))
1220 goto nla_put_failure;
1221 }
1222
1223 nla_nest_end(msg, nl_wowlan);
1224 }
1225 #endif
1226
1227 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1228 dev->wiphy.software_iftypes))
1229 goto nla_put_failure;
1230
1231 if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1232 goto nla_put_failure;
1233
1234 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1235 nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1236 dev->wiphy.ap_sme_capa))
1237 goto nla_put_failure;
1238
1239 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1240 dev->wiphy.features))
1241 goto nla_put_failure;
1242
1243 if (dev->wiphy.ht_capa_mod_mask &&
1244 nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1245 sizeof(*dev->wiphy.ht_capa_mod_mask),
1246 dev->wiphy.ht_capa_mod_mask))
1247 goto nla_put_failure;
1248
1249 return genlmsg_end(msg, hdr);
1250
1251 nla_put_failure:
1252 genlmsg_cancel(msg, hdr);
1253 return -EMSGSIZE;
1254 }
1255
1256 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1257 {
1258 int idx = 0;
1259 int start = cb->args[0];
1260 struct cfg80211_registered_device *dev;
1261
1262 mutex_lock(&cfg80211_mutex);
1263 list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1264 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1265 continue;
1266 if (++idx <= start)
1267 continue;
1268 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1269 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1270 dev) < 0) {
1271 idx--;
1272 break;
1273 }
1274 }
1275 mutex_unlock(&cfg80211_mutex);
1276
1277 cb->args[0] = idx;
1278
1279 return skb->len;
1280 }
1281
1282 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1283 {
1284 struct sk_buff *msg;
1285 struct cfg80211_registered_device *dev = info->user_ptr[0];
1286
1287 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1288 if (!msg)
1289 return -ENOMEM;
1290
1291 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1292 nlmsg_free(msg);
1293 return -ENOBUFS;
1294 }
1295
1296 return genlmsg_reply(msg, info);
1297 }
1298
1299 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1300 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
1301 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
1302 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
1303 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
1304 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
1305 };
1306
1307 static int parse_txq_params(struct nlattr *tb[],
1308 struct ieee80211_txq_params *txq_params)
1309 {
1310 if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1311 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1312 !tb[NL80211_TXQ_ATTR_AIFS])
1313 return -EINVAL;
1314
1315 txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1316 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1317 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1318 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1319 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1320
1321 if (txq_params->ac >= NL80211_NUM_ACS)
1322 return -EINVAL;
1323
1324 return 0;
1325 }
1326
1327 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1328 {
1329 /*
1330 * You can only set the channel explicitly for WDS interfaces,
1331 * all others have their channel managed via their respective
1332 * "establish a connection" command (connect, join, ...)
1333 *
1334 * For AP/GO and mesh mode, the channel can be set with the
1335 * channel userspace API, but is only stored and passed to the
1336 * low-level driver when the AP starts or the mesh is joined.
1337 * This is for backward compatibility, userspace can also give
1338 * the channel in the start-ap or join-mesh commands instead.
1339 *
1340 * Monitors are special as they are normally slaved to
1341 * whatever else is going on, so they have their own special
1342 * operation to set the monitor channel if possible.
1343 */
1344 return !wdev ||
1345 wdev->iftype == NL80211_IFTYPE_AP ||
1346 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1347 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1348 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1349 }
1350
1351 static bool nl80211_valid_channel_type(struct genl_info *info,
1352 enum nl80211_channel_type *channel_type)
1353 {
1354 enum nl80211_channel_type tmp;
1355
1356 if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1357 return false;
1358
1359 tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1360 if (tmp != NL80211_CHAN_NO_HT &&
1361 tmp != NL80211_CHAN_HT20 &&
1362 tmp != NL80211_CHAN_HT40PLUS &&
1363 tmp != NL80211_CHAN_HT40MINUS)
1364 return false;
1365
1366 if (channel_type)
1367 *channel_type = tmp;
1368
1369 return true;
1370 }
1371
1372 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1373 struct wireless_dev *wdev,
1374 struct genl_info *info)
1375 {
1376 struct ieee80211_channel *channel;
1377 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1378 u32 freq;
1379 int result;
1380 enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1381
1382 if (wdev)
1383 iftype = wdev->iftype;
1384
1385 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1386 return -EINVAL;
1387
1388 if (!nl80211_can_set_dev_channel(wdev))
1389 return -EOPNOTSUPP;
1390
1391 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1392 !nl80211_valid_channel_type(info, &channel_type))
1393 return -EINVAL;
1394
1395 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1396
1397 mutex_lock(&rdev->devlist_mtx);
1398 switch (iftype) {
1399 case NL80211_IFTYPE_AP:
1400 case NL80211_IFTYPE_P2P_GO:
1401 if (wdev->beacon_interval) {
1402 result = -EBUSY;
1403 break;
1404 }
1405 channel = rdev_freq_to_chan(rdev, freq, channel_type);
1406 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
1407 channel,
1408 channel_type)) {
1409 result = -EINVAL;
1410 break;
1411 }
1412 wdev->preset_chan = channel;
1413 wdev->preset_chantype = channel_type;
1414 result = 0;
1415 break;
1416 case NL80211_IFTYPE_MESH_POINT:
1417 result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
1418 break;
1419 case NL80211_IFTYPE_MONITOR:
1420 result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
1421 break;
1422 default:
1423 result = -EINVAL;
1424 }
1425 mutex_unlock(&rdev->devlist_mtx);
1426
1427 return result;
1428 }
1429
1430 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1431 {
1432 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1433 struct net_device *netdev = info->user_ptr[1];
1434
1435 return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1436 }
1437
1438 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1439 {
1440 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1441 struct net_device *dev = info->user_ptr[1];
1442 struct wireless_dev *wdev = dev->ieee80211_ptr;
1443 const u8 *bssid;
1444
1445 if (!info->attrs[NL80211_ATTR_MAC])
1446 return -EINVAL;
1447
1448 if (netif_running(dev))
1449 return -EBUSY;
1450
1451 if (!rdev->ops->set_wds_peer)
1452 return -EOPNOTSUPP;
1453
1454 if (wdev->iftype != NL80211_IFTYPE_WDS)
1455 return -EOPNOTSUPP;
1456
1457 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1458 return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1459 }
1460
1461
1462 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1463 {
1464 struct cfg80211_registered_device *rdev;
1465 struct net_device *netdev = NULL;
1466 struct wireless_dev *wdev;
1467 int result = 0, rem_txq_params = 0;
1468 struct nlattr *nl_txq_params;
1469 u32 changed;
1470 u8 retry_short = 0, retry_long = 0;
1471 u32 frag_threshold = 0, rts_threshold = 0;
1472 u8 coverage_class = 0;
1473
1474 /*
1475 * Try to find the wiphy and netdev. Normally this
1476 * function shouldn't need the netdev, but this is
1477 * done for backward compatibility -- previously
1478 * setting the channel was done per wiphy, but now
1479 * it is per netdev. Previous userland like hostapd
1480 * also passed a netdev to set_wiphy, so that it is
1481 * possible to let that go to the right netdev!
1482 */
1483 mutex_lock(&cfg80211_mutex);
1484
1485 if (info->attrs[NL80211_ATTR_IFINDEX]) {
1486 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1487
1488 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1489 if (netdev && netdev->ieee80211_ptr) {
1490 rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1491 mutex_lock(&rdev->mtx);
1492 } else
1493 netdev = NULL;
1494 }
1495
1496 if (!netdev) {
1497 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1498 info->attrs);
1499 if (IS_ERR(rdev)) {
1500 mutex_unlock(&cfg80211_mutex);
1501 return PTR_ERR(rdev);
1502 }
1503 wdev = NULL;
1504 netdev = NULL;
1505 result = 0;
1506
1507 mutex_lock(&rdev->mtx);
1508 } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1509 wdev = netdev->ieee80211_ptr;
1510 else
1511 wdev = NULL;
1512
1513 /*
1514 * end workaround code, by now the rdev is available
1515 * and locked, and wdev may or may not be NULL.
1516 */
1517
1518 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1519 result = cfg80211_dev_rename(
1520 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1521
1522 mutex_unlock(&cfg80211_mutex);
1523
1524 if (result)
1525 goto bad_res;
1526
1527 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1528 struct ieee80211_txq_params txq_params;
1529 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1530
1531 if (!rdev->ops->set_txq_params) {
1532 result = -EOPNOTSUPP;
1533 goto bad_res;
1534 }
1535
1536 if (!netdev) {
1537 result = -EINVAL;
1538 goto bad_res;
1539 }
1540
1541 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1542 netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1543 result = -EINVAL;
1544 goto bad_res;
1545 }
1546
1547 if (!netif_running(netdev)) {
1548 result = -ENETDOWN;
1549 goto bad_res;
1550 }
1551
1552 nla_for_each_nested(nl_txq_params,
1553 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1554 rem_txq_params) {
1555 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1556 nla_data(nl_txq_params),
1557 nla_len(nl_txq_params),
1558 txq_params_policy);
1559 result = parse_txq_params(tb, &txq_params);
1560 if (result)
1561 goto bad_res;
1562
1563 result = rdev->ops->set_txq_params(&rdev->wiphy,
1564 netdev,
1565 &txq_params);
1566 if (result)
1567 goto bad_res;
1568 }
1569 }
1570
1571 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1572 result = __nl80211_set_channel(rdev, wdev, info);
1573 if (result)
1574 goto bad_res;
1575 }
1576
1577 if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1578 enum nl80211_tx_power_setting type;
1579 int idx, mbm = 0;
1580
1581 if (!rdev->ops->set_tx_power) {
1582 result = -EOPNOTSUPP;
1583 goto bad_res;
1584 }
1585
1586 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1587 type = nla_get_u32(info->attrs[idx]);
1588
1589 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1590 (type != NL80211_TX_POWER_AUTOMATIC)) {
1591 result = -EINVAL;
1592 goto bad_res;
1593 }
1594
1595 if (type != NL80211_TX_POWER_AUTOMATIC) {
1596 idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1597 mbm = nla_get_u32(info->attrs[idx]);
1598 }
1599
1600 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1601 if (result)
1602 goto bad_res;
1603 }
1604
1605 if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1606 info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1607 u32 tx_ant, rx_ant;
1608 if ((!rdev->wiphy.available_antennas_tx &&
1609 !rdev->wiphy.available_antennas_rx) ||
1610 !rdev->ops->set_antenna) {
1611 result = -EOPNOTSUPP;
1612 goto bad_res;
1613 }
1614
1615 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1616 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1617
1618 /* reject antenna configurations which don't match the
1619 * available antenna masks, except for the "all" mask */
1620 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1621 (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1622 result = -EINVAL;
1623 goto bad_res;
1624 }
1625
1626 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1627 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1628
1629 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1630 if (result)
1631 goto bad_res;
1632 }
1633
1634 changed = 0;
1635
1636 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1637 retry_short = nla_get_u8(
1638 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1639 if (retry_short == 0) {
1640 result = -EINVAL;
1641 goto bad_res;
1642 }
1643 changed |= WIPHY_PARAM_RETRY_SHORT;
1644 }
1645
1646 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1647 retry_long = nla_get_u8(
1648 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1649 if (retry_long == 0) {
1650 result = -EINVAL;
1651 goto bad_res;
1652 }
1653 changed |= WIPHY_PARAM_RETRY_LONG;
1654 }
1655
1656 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1657 frag_threshold = nla_get_u32(
1658 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1659 if (frag_threshold < 256) {
1660 result = -EINVAL;
1661 goto bad_res;
1662 }
1663 if (frag_threshold != (u32) -1) {
1664 /*
1665 * Fragments (apart from the last one) are required to
1666 * have even length. Make the fragmentation code
1667 * simpler by stripping LSB should someone try to use
1668 * odd threshold value.
1669 */
1670 frag_threshold &= ~0x1;
1671 }
1672 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1673 }
1674
1675 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1676 rts_threshold = nla_get_u32(
1677 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1678 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1679 }
1680
1681 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1682 coverage_class = nla_get_u8(
1683 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1684 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1685 }
1686
1687 if (changed) {
1688 u8 old_retry_short, old_retry_long;
1689 u32 old_frag_threshold, old_rts_threshold;
1690 u8 old_coverage_class;
1691
1692 if (!rdev->ops->set_wiphy_params) {
1693 result = -EOPNOTSUPP;
1694 goto bad_res;
1695 }
1696
1697 old_retry_short = rdev->wiphy.retry_short;
1698 old_retry_long = rdev->wiphy.retry_long;
1699 old_frag_threshold = rdev->wiphy.frag_threshold;
1700 old_rts_threshold = rdev->wiphy.rts_threshold;
1701 old_coverage_class = rdev->wiphy.coverage_class;
1702
1703 if (changed & WIPHY_PARAM_RETRY_SHORT)
1704 rdev->wiphy.retry_short = retry_short;
1705 if (changed & WIPHY_PARAM_RETRY_LONG)
1706 rdev->wiphy.retry_long = retry_long;
1707 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1708 rdev->wiphy.frag_threshold = frag_threshold;
1709 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1710 rdev->wiphy.rts_threshold = rts_threshold;
1711 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1712 rdev->wiphy.coverage_class = coverage_class;
1713
1714 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1715 if (result) {
1716 rdev->wiphy.retry_short = old_retry_short;
1717 rdev->wiphy.retry_long = old_retry_long;
1718 rdev->wiphy.frag_threshold = old_frag_threshold;
1719 rdev->wiphy.rts_threshold = old_rts_threshold;
1720 rdev->wiphy.coverage_class = old_coverage_class;
1721 }
1722 }
1723
1724 bad_res:
1725 mutex_unlock(&rdev->mtx);
1726 if (netdev)
1727 dev_put(netdev);
1728 return result;
1729 }
1730
1731 static inline u64 wdev_id(struct wireless_dev *wdev)
1732 {
1733 return (u64)wdev->identifier |
1734 ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1735 }
1736
1737 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1738 struct cfg80211_registered_device *rdev,
1739 struct wireless_dev *wdev)
1740 {
1741 struct net_device *dev = wdev->netdev;
1742 void *hdr;
1743
1744 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1745 if (!hdr)
1746 return -1;
1747
1748 if (dev &&
1749 (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1750 nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1751 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dev->dev_addr)))
1752 goto nla_put_failure;
1753
1754 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1755 nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1756 nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1757 nla_put_u32(msg, NL80211_ATTR_GENERATION,
1758 rdev->devlist_generation ^
1759 (cfg80211_rdev_list_generation << 2)))
1760 goto nla_put_failure;
1761
1762 if (rdev->monitor_channel) {
1763 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1764 rdev->monitor_channel->center_freq) ||
1765 nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1766 rdev->monitor_channel_type))
1767 goto nla_put_failure;
1768 }
1769
1770 return genlmsg_end(msg, hdr);
1771
1772 nla_put_failure:
1773 genlmsg_cancel(msg, hdr);
1774 return -EMSGSIZE;
1775 }
1776
1777 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1778 {
1779 int wp_idx = 0;
1780 int if_idx = 0;
1781 int wp_start = cb->args[0];
1782 int if_start = cb->args[1];
1783 struct cfg80211_registered_device *rdev;
1784 struct wireless_dev *wdev;
1785
1786 mutex_lock(&cfg80211_mutex);
1787 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1788 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1789 continue;
1790 if (wp_idx < wp_start) {
1791 wp_idx++;
1792 continue;
1793 }
1794 if_idx = 0;
1795
1796 mutex_lock(&rdev->devlist_mtx);
1797 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1798 if (if_idx < if_start) {
1799 if_idx++;
1800 continue;
1801 }
1802 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1803 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1804 rdev, wdev) < 0) {
1805 mutex_unlock(&rdev->devlist_mtx);
1806 goto out;
1807 }
1808 if_idx++;
1809 }
1810 mutex_unlock(&rdev->devlist_mtx);
1811
1812 wp_idx++;
1813 }
1814 out:
1815 mutex_unlock(&cfg80211_mutex);
1816
1817 cb->args[0] = wp_idx;
1818 cb->args[1] = if_idx;
1819
1820 return skb->len;
1821 }
1822
1823 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1824 {
1825 struct sk_buff *msg;
1826 struct cfg80211_registered_device *dev = info->user_ptr[0];
1827 struct wireless_dev *wdev = info->user_ptr[1];
1828
1829 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1830 if (!msg)
1831 return -ENOMEM;
1832
1833 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1834 dev, wdev) < 0) {
1835 nlmsg_free(msg);
1836 return -ENOBUFS;
1837 }
1838
1839 return genlmsg_reply(msg, info);
1840 }
1841
1842 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1843 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1844 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1845 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1846 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1847 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1848 };
1849
1850 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1851 {
1852 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1853 int flag;
1854
1855 *mntrflags = 0;
1856
1857 if (!nla)
1858 return -EINVAL;
1859
1860 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1861 nla, mntr_flags_policy))
1862 return -EINVAL;
1863
1864 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1865 if (flags[flag])
1866 *mntrflags |= (1<<flag);
1867
1868 return 0;
1869 }
1870
1871 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1872 struct net_device *netdev, u8 use_4addr,
1873 enum nl80211_iftype iftype)
1874 {
1875 if (!use_4addr) {
1876 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1877 return -EBUSY;
1878 return 0;
1879 }
1880
1881 switch (iftype) {
1882 case NL80211_IFTYPE_AP_VLAN:
1883 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1884 return 0;
1885 break;
1886 case NL80211_IFTYPE_STATION:
1887 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1888 return 0;
1889 break;
1890 default:
1891 break;
1892 }
1893
1894 return -EOPNOTSUPP;
1895 }
1896
1897 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1898 {
1899 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1900 struct vif_params params;
1901 int err;
1902 enum nl80211_iftype otype, ntype;
1903 struct net_device *dev = info->user_ptr[1];
1904 u32 _flags, *flags = NULL;
1905 bool change = false;
1906
1907 memset(&params, 0, sizeof(params));
1908
1909 otype = ntype = dev->ieee80211_ptr->iftype;
1910
1911 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1912 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1913 if (otype != ntype)
1914 change = true;
1915 if (ntype > NL80211_IFTYPE_MAX)
1916 return -EINVAL;
1917 }
1918
1919 if (info->attrs[NL80211_ATTR_MESH_ID]) {
1920 struct wireless_dev *wdev = dev->ieee80211_ptr;
1921
1922 if (ntype != NL80211_IFTYPE_MESH_POINT)
1923 return -EINVAL;
1924 if (netif_running(dev))
1925 return -EBUSY;
1926
1927 wdev_lock(wdev);
1928 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1929 IEEE80211_MAX_MESH_ID_LEN);
1930 wdev->mesh_id_up_len =
1931 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1932 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1933 wdev->mesh_id_up_len);
1934 wdev_unlock(wdev);
1935 }
1936
1937 if (info->attrs[NL80211_ATTR_4ADDR]) {
1938 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1939 change = true;
1940 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1941 if (err)
1942 return err;
1943 } else {
1944 params.use_4addr = -1;
1945 }
1946
1947 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1948 if (ntype != NL80211_IFTYPE_MONITOR)
1949 return -EINVAL;
1950 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1951 &_flags);
1952 if (err)
1953 return err;
1954
1955 flags = &_flags;
1956 change = true;
1957 }
1958
1959 if (change)
1960 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1961 else
1962 err = 0;
1963
1964 if (!err && params.use_4addr != -1)
1965 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1966
1967 return err;
1968 }
1969
1970 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1971 {
1972 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1973 struct vif_params params;
1974 struct wireless_dev *wdev;
1975 int err;
1976 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1977 u32 flags;
1978
1979 memset(&params, 0, sizeof(params));
1980
1981 if (!info->attrs[NL80211_ATTR_IFNAME])
1982 return -EINVAL;
1983
1984 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1985 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1986 if (type > NL80211_IFTYPE_MAX)
1987 return -EINVAL;
1988 }
1989
1990 if (!rdev->ops->add_virtual_intf ||
1991 !(rdev->wiphy.interface_modes & (1 << type)))
1992 return -EOPNOTSUPP;
1993
1994 if (info->attrs[NL80211_ATTR_4ADDR]) {
1995 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1996 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1997 if (err)
1998 return err;
1999 }
2000
2001 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2002 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2003 &flags);
2004 wdev = rdev->ops->add_virtual_intf(&rdev->wiphy,
2005 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2006 type, err ? NULL : &flags, &params);
2007 if (IS_ERR(wdev))
2008 return PTR_ERR(wdev);
2009
2010 if (type == NL80211_IFTYPE_MESH_POINT &&
2011 info->attrs[NL80211_ATTR_MESH_ID]) {
2012 wdev_lock(wdev);
2013 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2014 IEEE80211_MAX_MESH_ID_LEN);
2015 wdev->mesh_id_up_len =
2016 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2017 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2018 wdev->mesh_id_up_len);
2019 wdev_unlock(wdev);
2020 }
2021
2022 return 0;
2023 }
2024
2025 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2026 {
2027 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2028 struct wireless_dev *wdev = info->user_ptr[1];
2029
2030 if (!rdev->ops->del_virtual_intf)
2031 return -EOPNOTSUPP;
2032
2033 /*
2034 * If we remove a wireless device without a netdev then clear
2035 * user_ptr[1] so that nl80211_post_doit won't dereference it
2036 * to check if it needs to do dev_put(). Otherwise it crashes
2037 * since the wdev has been freed, unlike with a netdev where
2038 * we need the dev_put() for the netdev to really be freed.
2039 */
2040 if (!wdev->netdev)
2041 info->user_ptr[1] = NULL;
2042
2043 return rdev->ops->del_virtual_intf(&rdev->wiphy, wdev);
2044 }
2045
2046 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2047 {
2048 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2049 struct net_device *dev = info->user_ptr[1];
2050 u16 noack_map;
2051
2052 if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2053 return -EINVAL;
2054
2055 if (!rdev->ops->set_noack_map)
2056 return -EOPNOTSUPP;
2057
2058 noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2059
2060 return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
2061 }
2062
2063 struct get_key_cookie {
2064 struct sk_buff *msg;
2065 int error;
2066 int idx;
2067 };
2068
2069 static void get_key_callback(void *c, struct key_params *params)
2070 {
2071 struct nlattr *key;
2072 struct get_key_cookie *cookie = c;
2073
2074 if ((params->key &&
2075 nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2076 params->key_len, params->key)) ||
2077 (params->seq &&
2078 nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2079 params->seq_len, params->seq)) ||
2080 (params->cipher &&
2081 nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2082 params->cipher)))
2083 goto nla_put_failure;
2084
2085 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2086 if (!key)
2087 goto nla_put_failure;
2088
2089 if ((params->key &&
2090 nla_put(cookie->msg, NL80211_KEY_DATA,
2091 params->key_len, params->key)) ||
2092 (params->seq &&
2093 nla_put(cookie->msg, NL80211_KEY_SEQ,
2094 params->seq_len, params->seq)) ||
2095 (params->cipher &&
2096 nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2097 params->cipher)))
2098 goto nla_put_failure;
2099
2100 if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2101 goto nla_put_failure;
2102
2103 nla_nest_end(cookie->msg, key);
2104
2105 return;
2106 nla_put_failure:
2107 cookie->error = 1;
2108 }
2109
2110 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2111 {
2112 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2113 int err;
2114 struct net_device *dev = info->user_ptr[1];
2115 u8 key_idx = 0;
2116 const u8 *mac_addr = NULL;
2117 bool pairwise;
2118 struct get_key_cookie cookie = {
2119 .error = 0,
2120 };
2121 void *hdr;
2122 struct sk_buff *msg;
2123
2124 if (info->attrs[NL80211_ATTR_KEY_IDX])
2125 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2126
2127 if (key_idx > 5)
2128 return -EINVAL;
2129
2130 if (info->attrs[NL80211_ATTR_MAC])
2131 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2132
2133 pairwise = !!mac_addr;
2134 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2135 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2136 if (kt >= NUM_NL80211_KEYTYPES)
2137 return -EINVAL;
2138 if (kt != NL80211_KEYTYPE_GROUP &&
2139 kt != NL80211_KEYTYPE_PAIRWISE)
2140 return -EINVAL;
2141 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2142 }
2143
2144 if (!rdev->ops->get_key)
2145 return -EOPNOTSUPP;
2146
2147 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2148 if (!msg)
2149 return -ENOMEM;
2150
2151 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2152 NL80211_CMD_NEW_KEY);
2153 if (IS_ERR(hdr))
2154 return PTR_ERR(hdr);
2155
2156 cookie.msg = msg;
2157 cookie.idx = key_idx;
2158
2159 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2160 nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2161 goto nla_put_failure;
2162 if (mac_addr &&
2163 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2164 goto nla_put_failure;
2165
2166 if (pairwise && mac_addr &&
2167 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2168 return -ENOENT;
2169
2170 err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2171 mac_addr, &cookie, get_key_callback);
2172
2173 if (err)
2174 goto free_msg;
2175
2176 if (cookie.error)
2177 goto nla_put_failure;
2178
2179 genlmsg_end(msg, hdr);
2180 return genlmsg_reply(msg, info);
2181
2182 nla_put_failure:
2183 err = -ENOBUFS;
2184 free_msg:
2185 nlmsg_free(msg);
2186 return err;
2187 }
2188
2189 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2190 {
2191 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2192 struct key_parse key;
2193 int err;
2194 struct net_device *dev = info->user_ptr[1];
2195
2196 err = nl80211_parse_key(info, &key);
2197 if (err)
2198 return err;
2199
2200 if (key.idx < 0)
2201 return -EINVAL;
2202
2203 /* only support setting default key */
2204 if (!key.def && !key.defmgmt)
2205 return -EINVAL;
2206
2207 wdev_lock(dev->ieee80211_ptr);
2208
2209 if (key.def) {
2210 if (!rdev->ops->set_default_key) {
2211 err = -EOPNOTSUPP;
2212 goto out;
2213 }
2214
2215 err = nl80211_key_allowed(dev->ieee80211_ptr);
2216 if (err)
2217 goto out;
2218
2219 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2220 key.def_uni, key.def_multi);
2221
2222 if (err)
2223 goto out;
2224
2225 #ifdef CONFIG_CFG80211_WEXT
2226 dev->ieee80211_ptr->wext.default_key = key.idx;
2227 #endif
2228 } else {
2229 if (key.def_uni || !key.def_multi) {
2230 err = -EINVAL;
2231 goto out;
2232 }
2233
2234 if (!rdev->ops->set_default_mgmt_key) {
2235 err = -EOPNOTSUPP;
2236 goto out;
2237 }
2238
2239 err = nl80211_key_allowed(dev->ieee80211_ptr);
2240 if (err)
2241 goto out;
2242
2243 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2244 dev, key.idx);
2245 if (err)
2246 goto out;
2247
2248 #ifdef CONFIG_CFG80211_WEXT
2249 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2250 #endif
2251 }
2252
2253 out:
2254 wdev_unlock(dev->ieee80211_ptr);
2255
2256 return err;
2257 }
2258
2259 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2260 {
2261 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2262 int err;
2263 struct net_device *dev = info->user_ptr[1];
2264 struct key_parse key;
2265 const u8 *mac_addr = NULL;
2266
2267 err = nl80211_parse_key(info, &key);
2268 if (err)
2269 return err;
2270
2271 if (!key.p.key)
2272 return -EINVAL;
2273
2274 if (info->attrs[NL80211_ATTR_MAC])
2275 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2276
2277 if (key.type == -1) {
2278 if (mac_addr)
2279 key.type = NL80211_KEYTYPE_PAIRWISE;
2280 else
2281 key.type = NL80211_KEYTYPE_GROUP;
2282 }
2283
2284 /* for now */
2285 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2286 key.type != NL80211_KEYTYPE_GROUP)
2287 return -EINVAL;
2288
2289 if (!rdev->ops->add_key)
2290 return -EOPNOTSUPP;
2291
2292 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2293 key.type == NL80211_KEYTYPE_PAIRWISE,
2294 mac_addr))
2295 return -EINVAL;
2296
2297 wdev_lock(dev->ieee80211_ptr);
2298 err = nl80211_key_allowed(dev->ieee80211_ptr);
2299 if (!err)
2300 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2301 key.type == NL80211_KEYTYPE_PAIRWISE,
2302 mac_addr, &key.p);
2303 wdev_unlock(dev->ieee80211_ptr);
2304
2305 return err;
2306 }
2307
2308 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2309 {
2310 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2311 int err;
2312 struct net_device *dev = info->user_ptr[1];
2313 u8 *mac_addr = NULL;
2314 struct key_parse key;
2315
2316 err = nl80211_parse_key(info, &key);
2317 if (err)
2318 return err;
2319
2320 if (info->attrs[NL80211_ATTR_MAC])
2321 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2322
2323 if (key.type == -1) {
2324 if (mac_addr)
2325 key.type = NL80211_KEYTYPE_PAIRWISE;
2326 else
2327 key.type = NL80211_KEYTYPE_GROUP;
2328 }
2329
2330 /* for now */
2331 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2332 key.type != NL80211_KEYTYPE_GROUP)
2333 return -EINVAL;
2334
2335 if (!rdev->ops->del_key)
2336 return -EOPNOTSUPP;
2337
2338 wdev_lock(dev->ieee80211_ptr);
2339 err = nl80211_key_allowed(dev->ieee80211_ptr);
2340
2341 if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2342 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2343 err = -ENOENT;
2344
2345 if (!err)
2346 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2347 key.type == NL80211_KEYTYPE_PAIRWISE,
2348 mac_addr);
2349
2350 #ifdef CONFIG_CFG80211_WEXT
2351 if (!err) {
2352 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2353 dev->ieee80211_ptr->wext.default_key = -1;
2354 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2355 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2356 }
2357 #endif
2358 wdev_unlock(dev->ieee80211_ptr);
2359
2360 return err;
2361 }
2362
2363 static int nl80211_parse_beacon(struct genl_info *info,
2364 struct cfg80211_beacon_data *bcn)
2365 {
2366 bool haveinfo = false;
2367
2368 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2369 !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2370 !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2371 !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2372 return -EINVAL;
2373
2374 memset(bcn, 0, sizeof(*bcn));
2375
2376 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2377 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2378 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2379 if (!bcn->head_len)
2380 return -EINVAL;
2381 haveinfo = true;
2382 }
2383
2384 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2385 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2386 bcn->tail_len =
2387 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2388 haveinfo = true;
2389 }
2390
2391 if (!haveinfo)
2392 return -EINVAL;
2393
2394 if (info->attrs[NL80211_ATTR_IE]) {
2395 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2396 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2397 }
2398
2399 if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2400 bcn->proberesp_ies =
2401 nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2402 bcn->proberesp_ies_len =
2403 nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2404 }
2405
2406 if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2407 bcn->assocresp_ies =
2408 nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2409 bcn->assocresp_ies_len =
2410 nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2411 }
2412
2413 if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2414 bcn->probe_resp =
2415 nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2416 bcn->probe_resp_len =
2417 nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2418 }
2419
2420 return 0;
2421 }
2422
2423 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2424 struct cfg80211_ap_settings *params)
2425 {
2426 struct wireless_dev *wdev;
2427 bool ret = false;
2428
2429 mutex_lock(&rdev->devlist_mtx);
2430
2431 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2432 if (wdev->iftype != NL80211_IFTYPE_AP &&
2433 wdev->iftype != NL80211_IFTYPE_P2P_GO)
2434 continue;
2435
2436 if (!wdev->preset_chan)
2437 continue;
2438
2439 params->channel = wdev->preset_chan;
2440 params->channel_type = wdev->preset_chantype;
2441 ret = true;
2442 break;
2443 }
2444
2445 mutex_unlock(&rdev->devlist_mtx);
2446
2447 return ret;
2448 }
2449
2450 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2451 {
2452 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2453 struct net_device *dev = info->user_ptr[1];
2454 struct wireless_dev *wdev = dev->ieee80211_ptr;
2455 struct cfg80211_ap_settings params;
2456 int err;
2457
2458 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2459 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2460 return -EOPNOTSUPP;
2461
2462 if (!rdev->ops->start_ap)
2463 return -EOPNOTSUPP;
2464
2465 if (wdev->beacon_interval)
2466 return -EALREADY;
2467
2468 memset(&params, 0, sizeof(params));
2469
2470 /* these are required for START_AP */
2471 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2472 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2473 !info->attrs[NL80211_ATTR_BEACON_HEAD])
2474 return -EINVAL;
2475
2476 err = nl80211_parse_beacon(info, &params.beacon);
2477 if (err)
2478 return err;
2479
2480 params.beacon_interval =
2481 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2482 params.dtim_period =
2483 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2484
2485 err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2486 if (err)
2487 return err;
2488
2489 /*
2490 * In theory, some of these attributes should be required here
2491 * but since they were not used when the command was originally
2492 * added, keep them optional for old user space programs to let
2493 * them continue to work with drivers that do not need the
2494 * additional information -- drivers must check!
2495 */
2496 if (info->attrs[NL80211_ATTR_SSID]) {
2497 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2498 params.ssid_len =
2499 nla_len(info->attrs[NL80211_ATTR_SSID]);
2500 if (params.ssid_len == 0 ||
2501 params.ssid_len > IEEE80211_MAX_SSID_LEN)
2502 return -EINVAL;
2503 }
2504
2505 if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2506 params.hidden_ssid = nla_get_u32(
2507 info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2508 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2509 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2510 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2511 return -EINVAL;
2512 }
2513
2514 params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2515
2516 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2517 params.auth_type = nla_get_u32(
2518 info->attrs[NL80211_ATTR_AUTH_TYPE]);
2519 if (!nl80211_valid_auth_type(params.auth_type))
2520 return -EINVAL;
2521 } else
2522 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2523
2524 err = nl80211_crypto_settings(rdev, info, &params.crypto,
2525 NL80211_MAX_NR_CIPHER_SUITES);
2526 if (err)
2527 return err;
2528
2529 if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2530 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2531 return -EOPNOTSUPP;
2532 params.inactivity_timeout = nla_get_u16(
2533 info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2534 }
2535
2536 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2537 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2538
2539 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2540 !nl80211_valid_channel_type(info, &channel_type))
2541 return -EINVAL;
2542
2543 params.channel = rdev_freq_to_chan(rdev,
2544 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2545 channel_type);
2546 if (!params.channel)
2547 return -EINVAL;
2548 params.channel_type = channel_type;
2549 } else if (wdev->preset_chan) {
2550 params.channel = wdev->preset_chan;
2551 params.channel_type = wdev->preset_chantype;
2552 } else if (!nl80211_get_ap_channel(rdev, &params))
2553 return -EINVAL;
2554
2555 if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2556 params.channel_type))
2557 return -EINVAL;
2558
2559 mutex_lock(&rdev->devlist_mtx);
2560 err = cfg80211_can_use_chan(rdev, wdev, params.channel,
2561 CHAN_MODE_SHARED);
2562 mutex_unlock(&rdev->devlist_mtx);
2563
2564 if (err)
2565 return err;
2566
2567 err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2568 if (!err) {
2569 wdev->preset_chan = params.channel;
2570 wdev->preset_chantype = params.channel_type;
2571 wdev->beacon_interval = params.beacon_interval;
2572 wdev->channel = params.channel;
2573 }
2574 return err;
2575 }
2576
2577 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2578 {
2579 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2580 struct net_device *dev = info->user_ptr[1];
2581 struct wireless_dev *wdev = dev->ieee80211_ptr;
2582 struct cfg80211_beacon_data params;
2583 int err;
2584
2585 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2586 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2587 return -EOPNOTSUPP;
2588
2589 if (!rdev->ops->change_beacon)
2590 return -EOPNOTSUPP;
2591
2592 if (!wdev->beacon_interval)
2593 return -EINVAL;
2594
2595 err = nl80211_parse_beacon(info, &params);
2596 if (err)
2597 return err;
2598
2599 return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2600 }
2601
2602 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2603 {
2604 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2605 struct net_device *dev = info->user_ptr[1];
2606
2607 return cfg80211_stop_ap(rdev, dev);
2608 }
2609
2610 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2611 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2612 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2613 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2614 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2615 [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2616 [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2617 };
2618
2619 static int parse_station_flags(struct genl_info *info,
2620 enum nl80211_iftype iftype,
2621 struct station_parameters *params)
2622 {
2623 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2624 struct nlattr *nla;
2625 int flag;
2626
2627 /*
2628 * Try parsing the new attribute first so userspace
2629 * can specify both for older kernels.
2630 */
2631 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2632 if (nla) {
2633 struct nl80211_sta_flag_update *sta_flags;
2634
2635 sta_flags = nla_data(nla);
2636 params->sta_flags_mask = sta_flags->mask;
2637 params->sta_flags_set = sta_flags->set;
2638 if ((params->sta_flags_mask |
2639 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2640 return -EINVAL;
2641 return 0;
2642 }
2643
2644 /* if present, parse the old attribute */
2645
2646 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2647 if (!nla)
2648 return 0;
2649
2650 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2651 nla, sta_flags_policy))
2652 return -EINVAL;
2653
2654 /*
2655 * Only allow certain flags for interface types so that
2656 * other attributes are silently ignored. Remember that
2657 * this is backward compatibility code with old userspace
2658 * and shouldn't be hit in other cases anyway.
2659 */
2660 switch (iftype) {
2661 case NL80211_IFTYPE_AP:
2662 case NL80211_IFTYPE_AP_VLAN:
2663 case NL80211_IFTYPE_P2P_GO:
2664 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2665 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2666 BIT(NL80211_STA_FLAG_WME) |
2667 BIT(NL80211_STA_FLAG_MFP);
2668 break;
2669 case NL80211_IFTYPE_P2P_CLIENT:
2670 case NL80211_IFTYPE_STATION:
2671 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2672 BIT(NL80211_STA_FLAG_TDLS_PEER);
2673 break;
2674 case NL80211_IFTYPE_MESH_POINT:
2675 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2676 BIT(NL80211_STA_FLAG_MFP) |
2677 BIT(NL80211_STA_FLAG_AUTHORIZED);
2678 default:
2679 return -EINVAL;
2680 }
2681
2682 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2683 if (flags[flag]) {
2684 params->sta_flags_set |= (1<<flag);
2685
2686 /* no longer support new API additions in old API */
2687 if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2688 return -EINVAL;
2689 }
2690 }
2691
2692 return 0;
2693 }
2694
2695 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2696 int attr)
2697 {
2698 struct nlattr *rate;
2699 u32 bitrate;
2700 u16 bitrate_compat;
2701
2702 rate = nla_nest_start(msg, attr);
2703 if (!rate)
2704 goto nla_put_failure;
2705
2706 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2707 bitrate = cfg80211_calculate_bitrate(info);
2708 /* report 16-bit bitrate only if we can */
2709 bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2710 if ((bitrate > 0 &&
2711 nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate)) ||
2712 (bitrate_compat > 0 &&
2713 nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat)) ||
2714 ((info->flags & RATE_INFO_FLAGS_MCS) &&
2715 nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2716 ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2717 nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2718 ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2719 nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2720 goto nla_put_failure;
2721
2722 nla_nest_end(msg, rate);
2723 return true;
2724
2725 nla_put_failure:
2726 return false;
2727 }
2728
2729 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2730 int flags,
2731 struct cfg80211_registered_device *rdev,
2732 struct net_device *dev,
2733 const u8 *mac_addr, struct station_info *sinfo)
2734 {
2735 void *hdr;
2736 struct nlattr *sinfoattr, *bss_param;
2737
2738 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2739 if (!hdr)
2740 return -1;
2741
2742 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2743 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2744 nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2745 goto nla_put_failure;
2746
2747 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2748 if (!sinfoattr)
2749 goto nla_put_failure;
2750 if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2751 nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2752 sinfo->connected_time))
2753 goto nla_put_failure;
2754 if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2755 nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2756 sinfo->inactive_time))
2757 goto nla_put_failure;
2758 if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2759 nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2760 sinfo->rx_bytes))
2761 goto nla_put_failure;
2762 if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2763 nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2764 sinfo->tx_bytes))
2765 goto nla_put_failure;
2766 if ((sinfo->filled & STATION_INFO_LLID) &&
2767 nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2768 goto nla_put_failure;
2769 if ((sinfo->filled & STATION_INFO_PLID) &&
2770 nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2771 goto nla_put_failure;
2772 if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2773 nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2774 sinfo->plink_state))
2775 goto nla_put_failure;
2776 switch (rdev->wiphy.signal_type) {
2777 case CFG80211_SIGNAL_TYPE_MBM:
2778 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2779 nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2780 sinfo->signal))
2781 goto nla_put_failure;
2782 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2783 nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2784 sinfo->signal_avg))
2785 goto nla_put_failure;
2786 break;
2787 default:
2788 break;
2789 }
2790 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2791 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2792 NL80211_STA_INFO_TX_BITRATE))
2793 goto nla_put_failure;
2794 }
2795 if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2796 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2797 NL80211_STA_INFO_RX_BITRATE))
2798 goto nla_put_failure;
2799 }
2800 if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2801 nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2802 sinfo->rx_packets))
2803 goto nla_put_failure;
2804 if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2805 nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2806 sinfo->tx_packets))
2807 goto nla_put_failure;
2808 if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2809 nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2810 sinfo->tx_retries))
2811 goto nla_put_failure;
2812 if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2813 nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2814 sinfo->tx_failed))
2815 goto nla_put_failure;
2816 if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2817 nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2818 sinfo->beacon_loss_count))
2819 goto nla_put_failure;
2820 if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2821 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2822 if (!bss_param)
2823 goto nla_put_failure;
2824
2825 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2826 nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2827 ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2828 nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2829 ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2830 nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2831 nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2832 sinfo->bss_param.dtim_period) ||
2833 nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2834 sinfo->bss_param.beacon_interval))
2835 goto nla_put_failure;
2836
2837 nla_nest_end(msg, bss_param);
2838 }
2839 if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2840 nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2841 sizeof(struct nl80211_sta_flag_update),
2842 &sinfo->sta_flags))
2843 goto nla_put_failure;
2844 if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2845 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2846 sinfo->t_offset))
2847 goto nla_put_failure;
2848 nla_nest_end(msg, sinfoattr);
2849
2850 if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2851 nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2852 sinfo->assoc_req_ies))
2853 goto nla_put_failure;
2854
2855 return genlmsg_end(msg, hdr);
2856
2857 nla_put_failure:
2858 genlmsg_cancel(msg, hdr);
2859 return -EMSGSIZE;
2860 }
2861
2862 static int nl80211_dump_station(struct sk_buff *skb,
2863 struct netlink_callback *cb)
2864 {
2865 struct station_info sinfo;
2866 struct cfg80211_registered_device *dev;
2867 struct net_device *netdev;
2868 u8 mac_addr[ETH_ALEN];
2869 int sta_idx = cb->args[1];
2870 int err;
2871
2872 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2873 if (err)
2874 return err;
2875
2876 if (!dev->ops->dump_station) {
2877 err = -EOPNOTSUPP;
2878 goto out_err;
2879 }
2880
2881 while (1) {
2882 memset(&sinfo, 0, sizeof(sinfo));
2883 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2884 mac_addr, &sinfo);
2885 if (err == -ENOENT)
2886 break;
2887 if (err)
2888 goto out_err;
2889
2890 if (nl80211_send_station(skb,
2891 NETLINK_CB(cb->skb).pid,
2892 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2893 dev, netdev, mac_addr,
2894 &sinfo) < 0)
2895 goto out;
2896
2897 sta_idx++;
2898 }
2899
2900
2901 out:
2902 cb->args[1] = sta_idx;
2903 err = skb->len;
2904 out_err:
2905 nl80211_finish_netdev_dump(dev);
2906
2907 return err;
2908 }
2909
2910 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2911 {
2912 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2913 struct net_device *dev = info->user_ptr[1];
2914 struct station_info sinfo;
2915 struct sk_buff *msg;
2916 u8 *mac_addr = NULL;
2917 int err;
2918
2919 memset(&sinfo, 0, sizeof(sinfo));
2920
2921 if (!info->attrs[NL80211_ATTR_MAC])
2922 return -EINVAL;
2923
2924 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2925
2926 if (!rdev->ops->get_station)
2927 return -EOPNOTSUPP;
2928
2929 err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2930 if (err)
2931 return err;
2932
2933 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2934 if (!msg)
2935 return -ENOMEM;
2936
2937 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2938 rdev, dev, mac_addr, &sinfo) < 0) {
2939 nlmsg_free(msg);
2940 return -ENOBUFS;
2941 }
2942
2943 return genlmsg_reply(msg, info);
2944 }
2945
2946 /*
2947 * Get vlan interface making sure it is running and on the right wiphy.
2948 */
2949 static struct net_device *get_vlan(struct genl_info *info,
2950 struct cfg80211_registered_device *rdev)
2951 {
2952 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2953 struct net_device *v;
2954 int ret;
2955
2956 if (!vlanattr)
2957 return NULL;
2958
2959 v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2960 if (!v)
2961 return ERR_PTR(-ENODEV);
2962
2963 if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2964 ret = -EINVAL;
2965 goto error;
2966 }
2967
2968 if (!netif_running(v)) {
2969 ret = -ENETDOWN;
2970 goto error;
2971 }
2972
2973 return v;
2974 error:
2975 dev_put(v);
2976 return ERR_PTR(ret);
2977 }
2978
2979 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2980 {
2981 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2982 int err;
2983 struct net_device *dev = info->user_ptr[1];
2984 struct station_parameters params;
2985 u8 *mac_addr = NULL;
2986
2987 memset(&params, 0, sizeof(params));
2988
2989 params.listen_interval = -1;
2990 params.plink_state = -1;
2991
2992 if (info->attrs[NL80211_ATTR_STA_AID])
2993 return -EINVAL;
2994
2995 if (!info->attrs[NL80211_ATTR_MAC])
2996 return -EINVAL;
2997
2998 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2999
3000 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3001 params.supported_rates =
3002 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3003 params.supported_rates_len =
3004 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3005 }
3006
3007 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3008 params.listen_interval =
3009 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3010
3011 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3012 params.ht_capa =
3013 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3014
3015 if (!rdev->ops->change_station)
3016 return -EOPNOTSUPP;
3017
3018 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3019 return -EINVAL;
3020
3021 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3022 params.plink_action =
3023 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3024
3025 if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3026 params.plink_state =
3027 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3028
3029 switch (dev->ieee80211_ptr->iftype) {
3030 case NL80211_IFTYPE_AP:
3031 case NL80211_IFTYPE_AP_VLAN:
3032 case NL80211_IFTYPE_P2P_GO:
3033 /* disallow mesh-specific things */
3034 if (params.plink_action)
3035 return -EINVAL;
3036
3037 /* TDLS can't be set, ... */
3038 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3039 return -EINVAL;
3040 /*
3041 * ... but don't bother the driver with it. This works around
3042 * a hostapd/wpa_supplicant issue -- it always includes the
3043 * TLDS_PEER flag in the mask even for AP mode.
3044 */
3045 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3046
3047 /* accept only the listed bits */
3048 if (params.sta_flags_mask &
3049 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3050 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3051 BIT(NL80211_STA_FLAG_WME) |
3052 BIT(NL80211_STA_FLAG_MFP)))
3053 return -EINVAL;
3054
3055 /* must be last in here for error handling */
3056 params.vlan = get_vlan(info, rdev);
3057 if (IS_ERR(params.vlan))
3058 return PTR_ERR(params.vlan);
3059 break;
3060 case NL80211_IFTYPE_P2P_CLIENT:
3061 case NL80211_IFTYPE_STATION:
3062 /*
3063 * Don't allow userspace to change the TDLS_PEER flag,
3064 * but silently ignore attempts to change it since we
3065 * don't have state here to verify that it doesn't try
3066 * to change the flag.
3067 */
3068 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3069 /* fall through */
3070 case NL80211_IFTYPE_ADHOC:
3071 /* disallow things sta doesn't support */
3072 if (params.plink_action)
3073 return -EINVAL;
3074 if (params.ht_capa)
3075 return -EINVAL;
3076 if (params.listen_interval >= 0)
3077 return -EINVAL;
3078 /* reject any changes other than AUTHORIZED */
3079 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3080 return -EINVAL;
3081 break;
3082 case NL80211_IFTYPE_MESH_POINT:
3083 /* disallow things mesh doesn't support */
3084 if (params.vlan)
3085 return -EINVAL;
3086 if (params.ht_capa)
3087 return -EINVAL;
3088 if (params.listen_interval >= 0)
3089 return -EINVAL;
3090 /*
3091 * No special handling for TDLS here -- the userspace
3092 * mesh code doesn't have this bug.
3093 */
3094 if (params.sta_flags_mask &
3095 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3096 BIT(NL80211_STA_FLAG_MFP) |
3097 BIT(NL80211_STA_FLAG_AUTHORIZED)))
3098 return -EINVAL;
3099 break;
3100 default:
3101 return -EOPNOTSUPP;
3102 }
3103
3104 /* be aware of params.vlan when changing code here */
3105
3106 err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
3107
3108 if (params.vlan)
3109 dev_put(params.vlan);
3110
3111 return err;
3112 }
3113
3114 static struct nla_policy
3115 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3116 [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3117 [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3118 };
3119
3120 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3121 {
3122 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3123 int err;
3124 struct net_device *dev = info->user_ptr[1];
3125 struct station_parameters params;
3126 u8 *mac_addr = NULL;
3127
3128 memset(&params, 0, sizeof(params));
3129
3130 if (!info->attrs[NL80211_ATTR_MAC])
3131 return -EINVAL;
3132
3133 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3134 return -EINVAL;
3135
3136 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3137 return -EINVAL;
3138
3139 if (!info->attrs[NL80211_ATTR_STA_AID])
3140 return -EINVAL;
3141
3142 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3143 params.supported_rates =
3144 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3145 params.supported_rates_len =
3146 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3147 params.listen_interval =
3148 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3149
3150 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3151 if (!params.aid || params.aid > IEEE80211_MAX_AID)
3152 return -EINVAL;
3153
3154 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3155 params.ht_capa =
3156 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3157
3158 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3159 params.plink_action =
3160 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3161
3162 if (!rdev->ops->add_station)
3163 return -EOPNOTSUPP;
3164
3165 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3166 return -EINVAL;
3167
3168 switch (dev->ieee80211_ptr->iftype) {
3169 case NL80211_IFTYPE_AP:
3170 case NL80211_IFTYPE_AP_VLAN:
3171 case NL80211_IFTYPE_P2P_GO:
3172 /* parse WME attributes if sta is WME capable */
3173 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3174 (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3175 info->attrs[NL80211_ATTR_STA_WME]) {
3176 struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3177 struct nlattr *nla;
3178
3179 nla = info->attrs[NL80211_ATTR_STA_WME];
3180 err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3181 nl80211_sta_wme_policy);
3182 if (err)
3183 return err;
3184
3185 if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3186 params.uapsd_queues =
3187 nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3188 if (params.uapsd_queues &
3189 ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3190 return -EINVAL;
3191
3192 if (tb[NL80211_STA_WME_MAX_SP])
3193 params.max_sp =
3194 nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3195
3196 if (params.max_sp &
3197 ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3198 return -EINVAL;
3199
3200 params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3201 }
3202 /* TDLS peers cannot be added */
3203 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3204 return -EINVAL;
3205 /* but don't bother the driver with it */
3206 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3207
3208 /* must be last in here for error handling */
3209 params.vlan = get_vlan(info, rdev);
3210 if (IS_ERR(params.vlan))
3211 return PTR_ERR(params.vlan);
3212 break;
3213 case NL80211_IFTYPE_MESH_POINT:
3214 /* TDLS peers cannot be added */
3215 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3216 return -EINVAL;
3217 break;
3218 case NL80211_IFTYPE_STATION:
3219 /* Only TDLS peers can be added */
3220 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3221 return -EINVAL;
3222 /* Can only add if TDLS ... */
3223 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3224 return -EOPNOTSUPP;
3225 /* ... with external setup is supported */
3226 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3227 return -EOPNOTSUPP;
3228 break;
3229 default:
3230 return -EOPNOTSUPP;
3231 }
3232
3233 /* be aware of params.vlan when changing code here */
3234
3235 err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3236
3237 if (params.vlan)
3238 dev_put(params.vlan);
3239 return err;
3240 }
3241
3242 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3243 {
3244 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3245 struct net_device *dev = info->user_ptr[1];
3246 u8 *mac_addr = NULL;
3247
3248 if (info->attrs[NL80211_ATTR_MAC])
3249 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3250
3251 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3252 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3253 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3254 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3255 return -EINVAL;
3256
3257 if (!rdev->ops->del_station)
3258 return -EOPNOTSUPP;
3259
3260 return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3261 }
3262
3263 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3264 int flags, struct net_device *dev,
3265 u8 *dst, u8 *next_hop,
3266 struct mpath_info *pinfo)
3267 {
3268 void *hdr;
3269 struct nlattr *pinfoattr;
3270
3271 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3272 if (!hdr)
3273 return -1;
3274
3275 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3276 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3277 nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3278 nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3279 goto nla_put_failure;
3280
3281 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3282 if (!pinfoattr)
3283 goto nla_put_failure;
3284 if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3285 nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3286 pinfo->frame_qlen))
3287 goto nla_put_failure;
3288 if (((pinfo->filled & MPATH_INFO_SN) &&
3289 nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3290 ((pinfo->filled & MPATH_INFO_METRIC) &&
3291 nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3292 pinfo->metric)) ||
3293 ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3294 nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3295 pinfo->exptime)) ||
3296 ((pinfo->filled & MPATH_INFO_FLAGS) &&
3297 nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3298 pinfo->flags)) ||
3299 ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3300 nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3301 pinfo->discovery_timeout)) ||
3302 ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3303 nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3304 pinfo->discovery_retries)))
3305 goto nla_put_failure;
3306
3307 nla_nest_end(msg, pinfoattr);
3308
3309 return genlmsg_end(msg, hdr);
3310
3311 nla_put_failure:
3312 genlmsg_cancel(msg, hdr);
3313 return -EMSGSIZE;
3314 }
3315
3316 static int nl80211_dump_mpath(struct sk_buff *skb,
3317 struct netlink_callback *cb)
3318 {
3319 struct mpath_info pinfo;
3320 struct cfg80211_registered_device *dev;
3321 struct net_device *netdev;
3322 u8 dst[ETH_ALEN];
3323 u8 next_hop[ETH_ALEN];
3324 int path_idx = cb->args[1];
3325 int err;
3326
3327 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3328 if (err)
3329 return err;
3330
3331 if (!dev->ops->dump_mpath) {
3332 err = -EOPNOTSUPP;
3333 goto out_err;
3334 }
3335
3336 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3337 err = -EOPNOTSUPP;
3338 goto out_err;
3339 }
3340
3341 while (1) {
3342 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3343 dst, next_hop, &pinfo);
3344 if (err == -ENOENT)
3345 break;
3346 if (err)
3347 goto out_err;
3348
3349 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3350 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3351 netdev, dst, next_hop,
3352 &pinfo) < 0)
3353 goto out;
3354
3355 path_idx++;
3356 }
3357
3358
3359 out:
3360 cb->args[1] = path_idx;
3361 err = skb->len;
3362 out_err:
3363 nl80211_finish_netdev_dump(dev);
3364 return err;
3365 }
3366
3367 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3368 {
3369 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3370 int err;
3371 struct net_device *dev = info->user_ptr[1];
3372 struct mpath_info pinfo;
3373 struct sk_buff *msg;
3374 u8 *dst = NULL;
3375 u8 next_hop[ETH_ALEN];
3376
3377 memset(&pinfo, 0, sizeof(pinfo));
3378
3379 if (!info->attrs[NL80211_ATTR_MAC])
3380 return -EINVAL;
3381
3382 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3383
3384 if (!rdev->ops->get_mpath)
3385 return -EOPNOTSUPP;
3386
3387 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3388 return -EOPNOTSUPP;
3389
3390 err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3391 if (err)
3392 return err;
3393
3394 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3395 if (!msg)
3396 return -ENOMEM;
3397
3398 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3399 dev, dst, next_hop, &pinfo) < 0) {
3400 nlmsg_free(msg);
3401 return -ENOBUFS;
3402 }
3403
3404 return genlmsg_reply(msg, info);
3405 }
3406
3407 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3408 {
3409 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3410 struct net_device *dev = info->user_ptr[1];
3411 u8 *dst = NULL;
3412 u8 *next_hop = NULL;
3413
3414 if (!info->attrs[NL80211_ATTR_MAC])
3415 return -EINVAL;
3416
3417 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3418 return -EINVAL;
3419
3420 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3421 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3422
3423 if (!rdev->ops->change_mpath)
3424 return -EOPNOTSUPP;
3425
3426 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3427 return -EOPNOTSUPP;
3428
3429 return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3430 }
3431
3432 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3433 {
3434 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3435 struct net_device *dev = info->user_ptr[1];
3436 u8 *dst = NULL;
3437 u8 *next_hop = NULL;
3438
3439 if (!info->attrs[NL80211_ATTR_MAC])
3440 return -EINVAL;
3441
3442 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3443 return -EINVAL;
3444
3445 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3446 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3447
3448 if (!rdev->ops->add_mpath)
3449 return -EOPNOTSUPP;
3450
3451 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3452 return -EOPNOTSUPP;
3453
3454 return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3455 }
3456
3457 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3458 {
3459 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3460 struct net_device *dev = info->user_ptr[1];
3461 u8 *dst = NULL;
3462
3463 if (info->attrs[NL80211_ATTR_MAC])
3464 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3465
3466 if (!rdev->ops->del_mpath)
3467 return -EOPNOTSUPP;
3468
3469 return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3470 }
3471
3472 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3473 {
3474 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3475 struct net_device *dev = info->user_ptr[1];
3476 struct bss_parameters params;
3477
3478 memset(&params, 0, sizeof(params));
3479 /* default to not changing parameters */
3480 params.use_cts_prot = -1;
3481 params.use_short_preamble = -1;
3482 params.use_short_slot_time = -1;
3483 params.ap_isolate = -1;
3484 params.ht_opmode = -1;
3485
3486 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3487 params.use_cts_prot =
3488 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3489 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3490 params.use_short_preamble =
3491 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3492 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3493 params.use_short_slot_time =
3494 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3495 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3496 params.basic_rates =
3497 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3498 params.basic_rates_len =
3499 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3500 }
3501 if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3502 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3503 if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3504 params.ht_opmode =
3505 nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3506
3507 if (!rdev->ops->change_bss)
3508 return -EOPNOTSUPP;
3509
3510 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3511 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3512 return -EOPNOTSUPP;
3513
3514 return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3515 }
3516
3517 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3518 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
3519 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
3520 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
3521 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
3522 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
3523 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
3524 };
3525
3526 static int parse_reg_rule(struct nlattr *tb[],
3527 struct ieee80211_reg_rule *reg_rule)
3528 {
3529 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3530 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3531
3532 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3533 return -EINVAL;
3534 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3535 return -EINVAL;
3536 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3537 return -EINVAL;
3538 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3539 return -EINVAL;
3540 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3541 return -EINVAL;
3542
3543 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3544
3545 freq_range->start_freq_khz =
3546 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3547 freq_range->end_freq_khz =
3548 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3549 freq_range->max_bandwidth_khz =
3550 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3551
3552 power_rule->max_eirp =
3553 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3554
3555 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3556 power_rule->max_antenna_gain =
3557 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3558
3559 return 0;
3560 }
3561
3562 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3563 {
3564 int r;
3565 char *data = NULL;
3566
3567 /*
3568 * You should only get this when cfg80211 hasn't yet initialized
3569 * completely when built-in to the kernel right between the time
3570 * window between nl80211_init() and regulatory_init(), if that is
3571 * even possible.
3572 */
3573 mutex_lock(&cfg80211_mutex);
3574 if (unlikely(!cfg80211_regdomain)) {
3575 mutex_unlock(&cfg80211_mutex);
3576 return -EINPROGRESS;
3577 }
3578 mutex_unlock(&cfg80211_mutex);
3579
3580 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3581 return -EINVAL;
3582
3583 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3584
3585 r = regulatory_hint_user(data);
3586
3587 return r;
3588 }
3589
3590 static int nl80211_get_mesh_config(struct sk_buff *skb,
3591 struct genl_info *info)
3592 {
3593 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3594 struct net_device *dev = info->user_ptr[1];
3595 struct wireless_dev *wdev = dev->ieee80211_ptr;
3596 struct mesh_config cur_params;
3597 int err = 0;
3598 void *hdr;
3599 struct nlattr *pinfoattr;
3600 struct sk_buff *msg;
3601
3602 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3603 return -EOPNOTSUPP;
3604
3605 if (!rdev->ops->get_mesh_config)
3606 return -EOPNOTSUPP;
3607
3608 wdev_lock(wdev);
3609 /* If not connected, get default parameters */
3610 if (!wdev->mesh_id_len)
3611 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3612 else
3613 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3614 &cur_params);
3615 wdev_unlock(wdev);
3616
3617 if (err)
3618 return err;
3619
3620 /* Draw up a netlink message to send back */
3621 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3622 if (!msg)
3623 return -ENOMEM;
3624 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3625 NL80211_CMD_GET_MESH_CONFIG);
3626 if (!hdr)
3627 goto out;
3628 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3629 if (!pinfoattr)
3630 goto nla_put_failure;
3631 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3632 nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3633 cur_params.dot11MeshRetryTimeout) ||
3634 nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3635 cur_params.dot11MeshConfirmTimeout) ||
3636 nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3637 cur_params.dot11MeshHoldingTimeout) ||
3638 nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3639 cur_params.dot11MeshMaxPeerLinks) ||
3640 nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3641 cur_params.dot11MeshMaxRetries) ||
3642 nla_put_u8(msg, NL80211_MESHCONF_TTL,
3643 cur_params.dot11MeshTTL) ||
3644 nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3645 cur_params.element_ttl) ||
3646 nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3647 cur_params.auto_open_plinks) ||
3648 nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3649 cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3650 nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3651 cur_params.dot11MeshHWMPmaxPREQretries) ||
3652 nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3653 cur_params.path_refresh_time) ||
3654 nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3655 cur_params.min_discovery_timeout) ||
3656 nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3657 cur_params.dot11MeshHWMPactivePathTimeout) ||
3658 nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3659 cur_params.dot11MeshHWMPpreqMinInterval) ||
3660 nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3661 cur_params.dot11MeshHWMPperrMinInterval) ||
3662 nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3663 cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3664 nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3665 cur_params.dot11MeshHWMPRootMode) ||
3666 nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3667 cur_params.dot11MeshHWMPRannInterval) ||
3668 nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3669 cur_params.dot11MeshGateAnnouncementProtocol) ||
3670 nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3671 cur_params.dot11MeshForwarding) ||
3672 nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3673 cur_params.rssi_threshold) ||
3674 nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3675 cur_params.ht_opmode) ||
3676 nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3677 cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3678 nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3679 cur_params.dot11MeshHWMProotInterval) ||
3680 nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3681 cur_params.dot11MeshHWMPconfirmationInterval))
3682 goto nla_put_failure;
3683 nla_nest_end(msg, pinfoattr);
3684 genlmsg_end(msg, hdr);
3685 return genlmsg_reply(msg, info);
3686
3687 nla_put_failure:
3688 genlmsg_cancel(msg, hdr);
3689 out:
3690 nlmsg_free(msg);
3691 return -ENOBUFS;
3692 }
3693
3694 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3695 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3696 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3697 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3698 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3699 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3700 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3701 [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3702 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3703 [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3704 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3705 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3706 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3707 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3708 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3709 [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3710 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3711 [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3712 [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3713 [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3714 [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3715 [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3716 [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3717 [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3718 [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3719 [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3720 };
3721
3722 static const struct nla_policy
3723 nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3724 [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3725 [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3726 [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3727 [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3728 [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3729 .len = IEEE80211_MAX_DATA_LEN },
3730 [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3731 };
3732
3733 static int nl80211_parse_mesh_config(struct genl_info *info,
3734 struct mesh_config *cfg,
3735 u32 *mask_out)
3736 {
3737 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3738 u32 mask = 0;
3739
3740 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3741 do {\
3742 if (table[attr_num]) {\
3743 cfg->param = nla_fn(table[attr_num]); \
3744 mask |= (1 << (attr_num - 1)); \
3745 } \
3746 } while (0);\
3747
3748
3749 if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3750 return -EINVAL;
3751 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3752 info->attrs[NL80211_ATTR_MESH_CONFIG],
3753 nl80211_meshconf_params_policy))
3754 return -EINVAL;
3755
3756 /* This makes sure that there aren't more than 32 mesh config
3757 * parameters (otherwise our bitfield scheme would not work.) */
3758 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3759
3760 /* Fill in the params struct */
3761 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3762 mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3763 nla_get_u16);
3764 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3765 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3766 nla_get_u16);
3767 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3768 mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3769 nla_get_u16);
3770 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3771 mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3772 nla_get_u16);
3773 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3774 mask, NL80211_MESHCONF_MAX_RETRIES,
3775 nla_get_u8);
3776 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3777 mask, NL80211_MESHCONF_TTL, nla_get_u8);
3778 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3779 mask, NL80211_MESHCONF_ELEMENT_TTL,
3780 nla_get_u8);
3781 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3782 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3783 nla_get_u8);
3784 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3785 NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3786 nla_get_u32);
3787 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3788 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3789 nla_get_u8);
3790 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3791 mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3792 nla_get_u32);
3793 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3794 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3795 nla_get_u16);
3796 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3797 NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3798 nla_get_u32);
3799 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3800 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3801 nla_get_u16);
3802 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3803 mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3804 nla_get_u16);
3805 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3806 dot11MeshHWMPnetDiameterTraversalTime, mask,
3807 NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3808 nla_get_u16);
3809 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3810 NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3811 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3812 NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3813 nla_get_u16);
3814 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3815 dot11MeshGateAnnouncementProtocol, mask,
3816 NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3817 nla_get_u8);
3818 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3819 mask, NL80211_MESHCONF_FORWARDING,
3820 nla_get_u8);
3821 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3822 mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3823 nla_get_u32);
3824 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3825 mask, NL80211_MESHCONF_HT_OPMODE,
3826 nla_get_u16);
3827 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3828 mask,
3829 NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3830 nla_get_u32);
3831 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3832 mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3833 nla_get_u16);
3834 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3835 dot11MeshHWMPconfirmationInterval, mask,
3836 NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3837 nla_get_u16);
3838 if (mask_out)
3839 *mask_out = mask;
3840
3841 return 0;
3842
3843 #undef FILL_IN_MESH_PARAM_IF_SET
3844 }
3845
3846 static int nl80211_parse_mesh_setup(struct genl_info *info,
3847 struct mesh_setup *setup)
3848 {
3849 struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3850
3851 if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3852 return -EINVAL;
3853 if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3854 info->attrs[NL80211_ATTR_MESH_SETUP],
3855 nl80211_mesh_setup_params_policy))
3856 return -EINVAL;
3857
3858 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3859 setup->sync_method =
3860 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3861 IEEE80211_SYNC_METHOD_VENDOR :
3862 IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3863
3864 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3865 setup->path_sel_proto =
3866 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3867 IEEE80211_PATH_PROTOCOL_VENDOR :
3868 IEEE80211_PATH_PROTOCOL_HWMP;
3869
3870 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3871 setup->path_metric =
3872 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3873 IEEE80211_PATH_METRIC_VENDOR :
3874 IEEE80211_PATH_METRIC_AIRTIME;
3875
3876
3877 if (tb[NL80211_MESH_SETUP_IE]) {
3878 struct nlattr *ieattr =
3879 tb[NL80211_MESH_SETUP_IE];
3880 if (!is_valid_ie_attr(ieattr))
3881 return -EINVAL;
3882 setup->ie = nla_data(ieattr);
3883 setup->ie_len = nla_len(ieattr);
3884 }
3885 setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3886 setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3887
3888 return 0;
3889 }
3890
3891 static int nl80211_update_mesh_config(struct sk_buff *skb,
3892 struct genl_info *info)
3893 {
3894 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3895 struct net_device *dev = info->user_ptr[1];
3896 struct wireless_dev *wdev = dev->ieee80211_ptr;
3897 struct mesh_config cfg;
3898 u32 mask;
3899 int err;
3900
3901 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3902 return -EOPNOTSUPP;
3903
3904 if (!rdev->ops->update_mesh_config)
3905 return -EOPNOTSUPP;
3906
3907 err = nl80211_parse_mesh_config(info, &cfg, &mask);
3908 if (err)
3909 return err;
3910
3911 wdev_lock(wdev);
3912 if (!wdev->mesh_id_len)
3913 err = -ENOLINK;
3914
3915 if (!err)
3916 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3917 mask, &cfg);
3918
3919 wdev_unlock(wdev);
3920
3921 return err;
3922 }
3923
3924 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3925 {
3926 struct sk_buff *msg;
3927 void *hdr = NULL;
3928 struct nlattr *nl_reg_rules;
3929 unsigned int i;
3930 int err = -EINVAL;
3931
3932 mutex_lock(&cfg80211_mutex);
3933
3934 if (!cfg80211_regdomain)
3935 goto out;
3936
3937 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3938 if (!msg) {
3939 err = -ENOBUFS;
3940 goto out;
3941 }
3942
3943 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3944 NL80211_CMD_GET_REG);
3945 if (!hdr)
3946 goto put_failure;
3947
3948 if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3949 cfg80211_regdomain->alpha2) ||
3950 (cfg80211_regdomain->dfs_region &&
3951 nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3952 cfg80211_regdomain->dfs_region)))
3953 goto nla_put_failure;
3954
3955 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3956 if (!nl_reg_rules)
3957 goto nla_put_failure;
3958
3959 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3960 struct nlattr *nl_reg_rule;
3961 const struct ieee80211_reg_rule *reg_rule;
3962 const struct ieee80211_freq_range *freq_range;
3963 const struct ieee80211_power_rule *power_rule;
3964
3965 reg_rule = &cfg80211_regdomain->reg_rules[i];
3966 freq_range = &reg_rule->freq_range;
3967 power_rule = &reg_rule->power_rule;
3968
3969 nl_reg_rule = nla_nest_start(msg, i);
3970 if (!nl_reg_rule)
3971 goto nla_put_failure;
3972
3973 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3974 reg_rule->flags) ||
3975 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3976 freq_range->start_freq_khz) ||
3977 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3978 freq_range->end_freq_khz) ||
3979 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3980 freq_range->max_bandwidth_khz) ||
3981 nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3982 power_rule->max_antenna_gain) ||
3983 nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3984 power_rule->max_eirp))
3985 goto nla_put_failure;
3986
3987 nla_nest_end(msg, nl_reg_rule);
3988 }
3989
3990 nla_nest_end(msg, nl_reg_rules);
3991
3992 genlmsg_end(msg, hdr);
3993 err = genlmsg_reply(msg, info);
3994 goto out;
3995
3996 nla_put_failure:
3997 genlmsg_cancel(msg, hdr);
3998 put_failure:
3999 nlmsg_free(msg);
4000 err = -EMSGSIZE;
4001 out:
4002 mutex_unlock(&cfg80211_mutex);
4003 return err;
4004 }
4005
4006 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4007 {
4008 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4009 struct nlattr *nl_reg_rule;
4010 char *alpha2 = NULL;
4011 int rem_reg_rules = 0, r = 0;
4012 u32 num_rules = 0, rule_idx = 0, size_of_regd;
4013 u8 dfs_region = 0;
4014 struct ieee80211_regdomain *rd = NULL;
4015
4016 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4017 return -EINVAL;
4018
4019 if (!info->attrs[NL80211_ATTR_REG_RULES])
4020 return -EINVAL;
4021
4022 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4023
4024 if (info->attrs[NL80211_ATTR_DFS_REGION])
4025 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4026
4027 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4028 rem_reg_rules) {
4029 num_rules++;
4030 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4031 return -EINVAL;
4032 }
4033
4034 mutex_lock(&cfg80211_mutex);
4035
4036 if (!reg_is_valid_request(alpha2)) {
4037 r = -EINVAL;
4038 goto bad_reg;
4039 }
4040
4041 size_of_regd = sizeof(struct ieee80211_regdomain) +
4042 (num_rules * sizeof(struct ieee80211_reg_rule));
4043
4044 rd = kzalloc(size_of_regd, GFP_KERNEL);
4045 if (!rd) {
4046 r = -ENOMEM;
4047 goto bad_reg;
4048 }
4049
4050 rd->n_reg_rules = num_rules;
4051 rd->alpha2[0] = alpha2[0];
4052 rd->alpha2[1] = alpha2[1];
4053
4054 /*
4055 * Disable DFS master mode if the DFS region was
4056 * not supported or known on this kernel.
4057 */
4058 if (reg_supported_dfs_region(dfs_region))
4059 rd->dfs_region = dfs_region;
4060
4061 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4062 rem_reg_rules) {
4063 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4064 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4065 reg_rule_policy);
4066 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4067 if (r)
4068 goto bad_reg;
4069
4070 rule_idx++;
4071
4072 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4073 r = -EINVAL;
4074 goto bad_reg;
4075 }
4076 }
4077
4078 BUG_ON(rule_idx != num_rules);
4079
4080 r = set_regdom(rd);
4081
4082 mutex_unlock(&cfg80211_mutex);
4083
4084 return r;
4085
4086 bad_reg:
4087 mutex_unlock(&cfg80211_mutex);
4088 kfree(rd);
4089 return r;
4090 }
4091
4092 static int validate_scan_freqs(struct nlattr *freqs)
4093 {
4094 struct nlattr *attr1, *attr2;
4095 int n_channels = 0, tmp1, tmp2;
4096
4097 nla_for_each_nested(attr1, freqs, tmp1) {
4098 n_channels++;
4099 /*
4100 * Some hardware has a limited channel list for
4101 * scanning, and it is pretty much nonsensical
4102 * to scan for a channel twice, so disallow that
4103 * and don't require drivers to check that the
4104 * channel list they get isn't longer than what
4105 * they can scan, as long as they can scan all
4106 * the channels they registered at once.
4107 */
4108 nla_for_each_nested(attr2, freqs, tmp2)
4109 if (attr1 != attr2 &&
4110 nla_get_u32(attr1) == nla_get_u32(attr2))
4111 return 0;
4112 }
4113
4114 return n_channels;
4115 }
4116
4117 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4118 {
4119 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4120 struct net_device *dev = info->user_ptr[1];
4121 struct cfg80211_scan_request *request;
4122 struct nlattr *attr;
4123 struct wiphy *wiphy;
4124 int err, tmp, n_ssids = 0, n_channels, i;
4125 size_t ie_len;
4126
4127 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4128 return -EINVAL;
4129
4130 wiphy = &rdev->wiphy;
4131
4132 if (!rdev->ops->scan)
4133 return -EOPNOTSUPP;
4134
4135 if (rdev->scan_req)
4136 return -EBUSY;
4137
4138 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4139 n_channels = validate_scan_freqs(
4140 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4141 if (!n_channels)
4142 return -EINVAL;
4143 } else {
4144 enum ieee80211_band band;
4145 n_channels = 0;
4146
4147 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4148 if (wiphy->bands[band])
4149 n_channels += wiphy->bands[band]->n_channels;
4150 }
4151
4152 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4153 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4154 n_ssids++;
4155
4156 if (n_ssids > wiphy->max_scan_ssids)
4157 return -EINVAL;
4158
4159 if (info->attrs[NL80211_ATTR_IE])
4160 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4161 else
4162 ie_len = 0;
4163
4164 if (ie_len > wiphy->max_scan_ie_len)
4165 return -EINVAL;
4166
4167 request = kzalloc(sizeof(*request)
4168 + sizeof(*request->ssids) * n_ssids
4169 + sizeof(*request->channels) * n_channels
4170 + ie_len, GFP_KERNEL);
4171 if (!request)
4172 return -ENOMEM;
4173
4174 if (n_ssids)
4175 request->ssids = (void *)&request->channels[n_channels];
4176 request->n_ssids = n_ssids;
4177 if (ie_len) {
4178 if (request->ssids)
4179 request->ie = (void *)(request->ssids + n_ssids);
4180 else
4181 request->ie = (void *)(request->channels + n_channels);
4182 }
4183
4184 i = 0;
4185 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4186 /* user specified, bail out if channel not found */
4187 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4188 struct ieee80211_channel *chan;
4189
4190 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4191
4192 if (!chan) {
4193 err = -EINVAL;
4194 goto out_free;
4195 }
4196
4197 /* ignore disabled channels */
4198 if (chan->flags & IEEE80211_CHAN_DISABLED)
4199 continue;
4200
4201 request->channels[i] = chan;
4202 i++;
4203 }
4204 } else {
4205 enum ieee80211_band band;
4206
4207 /* all channels */
4208 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4209 int j;
4210 if (!wiphy->bands[band])
4211 continue;
4212 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4213 struct ieee80211_channel *chan;
4214
4215 chan = &wiphy->bands[band]->channels[j];
4216
4217 if (chan->flags & IEEE80211_CHAN_DISABLED)
4218 continue;
4219
4220 request->channels[i] = chan;
4221 i++;
4222 }
4223 }
4224 }
4225
4226 if (!i) {
4227 err = -EINVAL;
4228 goto out_free;
4229 }
4230
4231 request->n_channels = i;
4232
4233 i = 0;
4234 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4235 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4236 if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4237 err = -EINVAL;
4238 goto out_free;
4239 }
4240 request->ssids[i].ssid_len = nla_len(attr);
4241 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4242 i++;
4243 }
4244 }
4245
4246 if (info->attrs[NL80211_ATTR_IE]) {
4247 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4248 memcpy((void *)request->ie,
4249 nla_data(info->attrs[NL80211_ATTR_IE]),
4250 request->ie_len);
4251 }
4252
4253 for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4254 if (wiphy->bands[i])
4255 request->rates[i] =
4256 (1 << wiphy->bands[i]->n_bitrates) - 1;
4257
4258 if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4259 nla_for_each_nested(attr,
4260 info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4261 tmp) {
4262 enum ieee80211_band band = nla_type(attr);
4263
4264 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4265 err = -EINVAL;
4266 goto out_free;
4267 }
4268 err = ieee80211_get_ratemask(wiphy->bands[band],
4269 nla_data(attr),
4270 nla_len(attr),
4271 &request->rates[band]);
4272 if (err)
4273 goto out_free;
4274 }
4275 }
4276
4277 request->no_cck =
4278 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4279
4280 request->dev = dev;
4281 request->wiphy = &rdev->wiphy;
4282
4283 rdev->scan_req = request;
4284 err = rdev->ops->scan(&rdev->wiphy, dev, request);
4285
4286 if (!err) {
4287 nl80211_send_scan_start(rdev, dev);
4288 dev_hold(dev);
4289 } else {
4290 out_free:
4291 rdev->scan_req = NULL;
4292 kfree(request);
4293 }
4294
4295 return err;
4296 }
4297
4298 static int nl80211_start_sched_scan(struct sk_buff *skb,
4299 struct genl_info *info)
4300 {
4301 struct cfg80211_sched_scan_request *request;
4302 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4303 struct net_device *dev = info->user_ptr[1];
4304 struct nlattr *attr;
4305 struct wiphy *wiphy;
4306 int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4307 u32 interval;
4308 enum ieee80211_band band;
4309 size_t ie_len;
4310 struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4311
4312 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4313 !rdev->ops->sched_scan_start)
4314 return -EOPNOTSUPP;
4315
4316 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4317 return -EINVAL;
4318
4319 if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4320 return -EINVAL;
4321
4322 interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4323 if (interval == 0)
4324 return -EINVAL;
4325
4326 wiphy = &rdev->wiphy;
4327
4328 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4329 n_channels = validate_scan_freqs(
4330 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4331 if (!n_channels)
4332 return -EINVAL;
4333 } else {
4334 n_channels = 0;
4335
4336 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4337 if (wiphy->bands[band])
4338 n_channels += wiphy->bands[band]->n_channels;
4339 }
4340
4341 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4342 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4343 tmp)
4344 n_ssids++;
4345
4346 if (n_ssids > wiphy->max_sched_scan_ssids)
4347 return -EINVAL;
4348
4349 if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4350 nla_for_each_nested(attr,
4351 info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4352 tmp)
4353 n_match_sets++;
4354
4355 if (n_match_sets > wiphy->max_match_sets)
4356 return -EINVAL;
4357
4358 if (info->attrs[NL80211_ATTR_IE])
4359 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4360 else
4361 ie_len = 0;
4362
4363 if (ie_len > wiphy->max_sched_scan_ie_len)
4364 return -EINVAL;
4365
4366 mutex_lock(&rdev->sched_scan_mtx);
4367
4368 if (rdev->sched_scan_req) {
4369 err = -EINPROGRESS;
4370 goto out;
4371 }
4372
4373 request = kzalloc(sizeof(*request)
4374 + sizeof(*request->ssids) * n_ssids
4375 + sizeof(*request->match_sets) * n_match_sets
4376 + sizeof(*request->channels) * n_channels
4377 + ie_len, GFP_KERNEL);
4378 if (!request) {
4379 err = -ENOMEM;
4380 goto out;
4381 }
4382
4383 if (n_ssids)
4384 request->ssids = (void *)&request->channels[n_channels];
4385 request->n_ssids = n_ssids;
4386 if (ie_len) {
4387 if (request->ssids)
4388 request->ie = (void *)(request->ssids + n_ssids);
4389 else
4390 request->ie = (void *)(request->channels + n_channels);
4391 }
4392
4393 if (n_match_sets) {
4394 if (request->ie)
4395 request->match_sets = (void *)(request->ie + ie_len);
4396 else if (request->ssids)
4397 request->match_sets =
4398 (void *)(request->ssids + n_ssids);
4399 else
4400 request->match_sets =
4401 (void *)(request->channels + n_channels);
4402 }
4403 request->n_match_sets = n_match_sets;
4404
4405 i = 0;
4406 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4407 /* user specified, bail out if channel not found */
4408 nla_for_each_nested(attr,
4409 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4410 tmp) {
4411 struct ieee80211_channel *chan;
4412
4413 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4414
4415 if (!chan) {
4416 err = -EINVAL;
4417 goto out_free;
4418 }
4419
4420 /* ignore disabled channels */
4421 if (chan->flags & IEEE80211_CHAN_DISABLED)
4422 continue;
4423
4424 request->channels[i] = chan;
4425 i++;
4426 }
4427 } else {
4428 /* all channels */
4429 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4430 int j;
4431 if (!wiphy->bands[band])
4432 continue;
4433 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4434 struct ieee80211_channel *chan;
4435
4436 chan = &wiphy->bands[band]->channels[j];
4437
4438 if (chan->flags & IEEE80211_CHAN_DISABLED)
4439 continue;
4440
4441 request->channels[i] = chan;
4442 i++;
4443 }
4444 }
4445 }
4446
4447 if (!i) {
4448 err = -EINVAL;
4449 goto out_free;
4450 }
4451
4452 request->n_channels = i;
4453
4454 i = 0;
4455 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4456 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4457 tmp) {
4458 if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4459 err = -EINVAL;
4460 goto out_free;
4461 }
4462 request->ssids[i].ssid_len = nla_len(attr);
4463 memcpy(request->ssids[i].ssid, nla_data(attr),
4464 nla_len(attr));
4465 i++;
4466 }
4467 }
4468
4469 i = 0;
4470 if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4471 nla_for_each_nested(attr,
4472 info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4473 tmp) {
4474 struct nlattr *ssid, *rssi;
4475
4476 nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4477 nla_data(attr), nla_len(attr),
4478 nl80211_match_policy);
4479 ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4480 if (ssid) {
4481 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4482 err = -EINVAL;
4483 goto out_free;
4484 }
4485 memcpy(request->match_sets[i].ssid.ssid,
4486 nla_data(ssid), nla_len(ssid));
4487 request->match_sets[i].ssid.ssid_len =
4488 nla_len(ssid);
4489 }
4490 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4491 if (rssi)
4492 request->rssi_thold = nla_get_u32(rssi);
4493 else
4494 request->rssi_thold =
4495 NL80211_SCAN_RSSI_THOLD_OFF;
4496 i++;
4497 }
4498 }
4499
4500 if (info->attrs[NL80211_ATTR_IE]) {
4501 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4502 memcpy((void *)request->ie,
4503 nla_data(info->attrs[NL80211_ATTR_IE]),
4504 request->ie_len);
4505 }
4506
4507 request->dev = dev;
4508 request->wiphy = &rdev->wiphy;
4509 request->interval = interval;
4510
4511 err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4512 if (!err) {
4513 rdev->sched_scan_req = request;
4514 nl80211_send_sched_scan(rdev, dev,
4515 NL80211_CMD_START_SCHED_SCAN);
4516 goto out;
4517 }
4518
4519 out_free:
4520 kfree(request);
4521 out:
4522 mutex_unlock(&rdev->sched_scan_mtx);
4523 return err;
4524 }
4525
4526 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4527 struct genl_info *info)
4528 {
4529 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4530 int err;
4531
4532 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4533 !rdev->ops->sched_scan_stop)
4534 return -EOPNOTSUPP;
4535
4536 mutex_lock(&rdev->sched_scan_mtx);
4537 err = __cfg80211_stop_sched_scan(rdev, false);
4538 mutex_unlock(&rdev->sched_scan_mtx);
4539
4540 return err;
4541 }
4542
4543 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4544 u32 seq, int flags,
4545 struct cfg80211_registered_device *rdev,
4546 struct wireless_dev *wdev,
4547 struct cfg80211_internal_bss *intbss)
4548 {
4549 struct cfg80211_bss *res = &intbss->pub;
4550 void *hdr;
4551 struct nlattr *bss;
4552
4553 ASSERT_WDEV_LOCK(wdev);
4554
4555 hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4556 NL80211_CMD_NEW_SCAN_RESULTS);
4557 if (!hdr)
4558 return -1;
4559
4560 genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4561
4562 if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4563 nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4564 goto nla_put_failure;
4565
4566 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4567 if (!bss)
4568 goto nla_put_failure;
4569 if ((!is_zero_ether_addr(res->bssid) &&
4570 nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4571 (res->information_elements && res->len_information_elements &&
4572 nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4573 res->len_information_elements,
4574 res->information_elements)) ||
4575 (res->beacon_ies && res->len_beacon_ies &&
4576 res->beacon_ies != res->information_elements &&
4577 nla_put(msg, NL80211_BSS_BEACON_IES,
4578 res->len_beacon_ies, res->beacon_ies)))
4579 goto nla_put_failure;
4580 if (res->tsf &&
4581 nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4582 goto nla_put_failure;
4583 if (res->beacon_interval &&
4584 nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4585 goto nla_put_failure;
4586 if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4587 nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4588 nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4589 jiffies_to_msecs(jiffies - intbss->ts)))
4590 goto nla_put_failure;
4591
4592 switch (rdev->wiphy.signal_type) {
4593 case CFG80211_SIGNAL_TYPE_MBM:
4594 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4595 goto nla_put_failure;
4596 break;
4597 case CFG80211_SIGNAL_TYPE_UNSPEC:
4598 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4599 goto nla_put_failure;
4600 break;
4601 default:
4602 break;
4603 }
4604
4605 switch (wdev->iftype) {
4606 case NL80211_IFTYPE_P2P_CLIENT:
4607 case NL80211_IFTYPE_STATION:
4608 if (intbss == wdev->current_bss &&
4609 nla_put_u32(msg, NL80211_BSS_STATUS,
4610 NL80211_BSS_STATUS_ASSOCIATED))
4611 goto nla_put_failure;
4612 break;
4613 case NL80211_IFTYPE_ADHOC:
4614 if (intbss == wdev->current_bss &&
4615 nla_put_u32(msg, NL80211_BSS_STATUS,
4616 NL80211_BSS_STATUS_IBSS_JOINED))
4617 goto nla_put_failure;
4618 break;
4619 default:
4620 break;
4621 }
4622
4623 nla_nest_end(msg, bss);
4624
4625 return genlmsg_end(msg, hdr);
4626
4627 nla_put_failure:
4628 genlmsg_cancel(msg, hdr);
4629 return -EMSGSIZE;
4630 }
4631
4632 static int nl80211_dump_scan(struct sk_buff *skb,
4633 struct netlink_callback *cb)
4634 {
4635 struct cfg80211_registered_device *rdev;
4636 struct net_device *dev;
4637 struct cfg80211_internal_bss *scan;
4638 struct wireless_dev *wdev;
4639 int start = cb->args[1], idx = 0;
4640 int err;
4641
4642 err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4643 if (err)
4644 return err;
4645
4646 wdev = dev->ieee80211_ptr;
4647
4648 wdev_lock(wdev);
4649 spin_lock_bh(&rdev->bss_lock);
4650 cfg80211_bss_expire(rdev);
4651
4652 cb->seq = rdev->bss_generation;
4653
4654 list_for_each_entry(scan, &rdev->bss_list, list) {
4655 if (++idx <= start)
4656 continue;
4657 if (nl80211_send_bss(skb, cb,
4658 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4659 rdev, wdev, scan) < 0) {
4660 idx--;
4661 break;
4662 }
4663 }
4664
4665 spin_unlock_bh(&rdev->bss_lock);
4666 wdev_unlock(wdev);
4667
4668 cb->args[1] = idx;
4669 nl80211_finish_netdev_dump(rdev);
4670
4671 return skb->len;
4672 }
4673
4674 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4675 int flags, struct net_device *dev,
4676 struct survey_info *survey)
4677 {
4678 void *hdr;
4679 struct nlattr *infoattr;
4680
4681 hdr = nl80211hdr_put(msg, pid, seq, flags,
4682 NL80211_CMD_NEW_SURVEY_RESULTS);
4683 if (!hdr)
4684 return -ENOMEM;
4685
4686 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4687 goto nla_put_failure;
4688
4689 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4690 if (!infoattr)
4691 goto nla_put_failure;
4692
4693 if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4694 survey->channel->center_freq))
4695 goto nla_put_failure;
4696
4697 if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4698 nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4699 goto nla_put_failure;
4700 if ((survey->filled & SURVEY_INFO_IN_USE) &&
4701 nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4702 goto nla_put_failure;
4703 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4704 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4705 survey->channel_time))
4706 goto nla_put_failure;
4707 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4708 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4709 survey->channel_time_busy))
4710 goto nla_put_failure;
4711 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4712 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4713 survey->channel_time_ext_busy))
4714 goto nla_put_failure;
4715 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4716 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4717 survey->channel_time_rx))
4718 goto nla_put_failure;
4719 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4720 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4721 survey->channel_time_tx))
4722 goto nla_put_failure;
4723
4724 nla_nest_end(msg, infoattr);
4725
4726 return genlmsg_end(msg, hdr);
4727
4728 nla_put_failure:
4729 genlmsg_cancel(msg, hdr);
4730 return -EMSGSIZE;
4731 }
4732
4733 static int nl80211_dump_survey(struct sk_buff *skb,
4734 struct netlink_callback *cb)
4735 {
4736 struct survey_info survey;
4737 struct cfg80211_registered_device *dev;
4738 struct net_device *netdev;
4739 int survey_idx = cb->args[1];
4740 int res;
4741
4742 res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4743 if (res)
4744 return res;
4745
4746 if (!dev->ops->dump_survey) {
4747 res = -EOPNOTSUPP;
4748 goto out_err;
4749 }
4750
4751 while (1) {
4752 struct ieee80211_channel *chan;
4753
4754 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4755 &survey);
4756 if (res == -ENOENT)
4757 break;
4758 if (res)
4759 goto out_err;
4760
4761 /* Survey without a channel doesn't make sense */
4762 if (!survey.channel) {
4763 res = -EINVAL;
4764 goto out;
4765 }
4766
4767 chan = ieee80211_get_channel(&dev->wiphy,
4768 survey.channel->center_freq);
4769 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4770 survey_idx++;
4771 continue;
4772 }
4773
4774 if (nl80211_send_survey(skb,
4775 NETLINK_CB(cb->skb).pid,
4776 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4777 netdev,
4778 &survey) < 0)
4779 goto out;
4780 survey_idx++;
4781 }
4782
4783 out:
4784 cb->args[1] = survey_idx;
4785 res = skb->len;
4786 out_err:
4787 nl80211_finish_netdev_dump(dev);
4788 return res;
4789 }
4790
4791 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4792 {
4793 return auth_type <= NL80211_AUTHTYPE_MAX;
4794 }
4795
4796 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4797 {
4798 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4799 NL80211_WPA_VERSION_2));
4800 }
4801
4802 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4803 {
4804 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4805 struct net_device *dev = info->user_ptr[1];
4806 struct ieee80211_channel *chan;
4807 const u8 *bssid, *ssid, *ie = NULL;
4808 int err, ssid_len, ie_len = 0;
4809 enum nl80211_auth_type auth_type;
4810 struct key_parse key;
4811 bool local_state_change;
4812
4813 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4814 return -EINVAL;
4815
4816 if (!info->attrs[NL80211_ATTR_MAC])
4817 return -EINVAL;
4818
4819 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4820 return -EINVAL;
4821
4822 if (!info->attrs[NL80211_ATTR_SSID])
4823 return -EINVAL;
4824
4825 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4826 return -EINVAL;
4827
4828 err = nl80211_parse_key(info, &key);
4829 if (err)
4830 return err;
4831
4832 if (key.idx >= 0) {
4833 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4834 return -EINVAL;
4835 if (!key.p.key || !key.p.key_len)
4836 return -EINVAL;
4837 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4838 key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4839 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4840 key.p.key_len != WLAN_KEY_LEN_WEP104))
4841 return -EINVAL;
4842 if (key.idx > 4)
4843 return -EINVAL;
4844 } else {
4845 key.p.key_len = 0;
4846 key.p.key = NULL;
4847 }
4848
4849 if (key.idx >= 0) {
4850 int i;
4851 bool ok = false;
4852 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4853 if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4854 ok = true;
4855 break;
4856 }
4857 }
4858 if (!ok)
4859 return -EINVAL;
4860 }
4861
4862 if (!rdev->ops->auth)
4863 return -EOPNOTSUPP;
4864
4865 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4866 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4867 return -EOPNOTSUPP;
4868
4869 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4870 chan = ieee80211_get_channel(&rdev->wiphy,
4871 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4872 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4873 return -EINVAL;
4874
4875 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4876 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4877
4878 if (info->attrs[NL80211_ATTR_IE]) {
4879 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4880 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4881 }
4882
4883 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4884 if (!nl80211_valid_auth_type(auth_type))
4885 return -EINVAL;
4886
4887 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4888
4889 /*
4890 * Since we no longer track auth state, ignore
4891 * requests to only change local state.
4892 */
4893 if (local_state_change)
4894 return 0;
4895
4896 return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4897 ssid, ssid_len, ie, ie_len,
4898 key.p.key, key.p.key_len, key.idx);
4899 }
4900
4901 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4902 struct genl_info *info,
4903 struct cfg80211_crypto_settings *settings,
4904 int cipher_limit)
4905 {
4906 memset(settings, 0, sizeof(*settings));
4907
4908 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4909
4910 if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4911 u16 proto;
4912 proto = nla_get_u16(
4913 info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4914 settings->control_port_ethertype = cpu_to_be16(proto);
4915 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4916 proto != ETH_P_PAE)
4917 return -EINVAL;
4918 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4919 settings->control_port_no_encrypt = true;
4920 } else
4921 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4922
4923 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4924 void *data;
4925 int len, i;
4926
4927 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4928 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4929 settings->n_ciphers_pairwise = len / sizeof(u32);
4930
4931 if (len % sizeof(u32))
4932 return -EINVAL;
4933
4934 if (settings->n_ciphers_pairwise > cipher_limit)
4935 return -EINVAL;
4936
4937 memcpy(settings->ciphers_pairwise, data, len);
4938
4939 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4940 if (!cfg80211_supported_cipher_suite(
4941 &rdev->wiphy,
4942 settings->ciphers_pairwise[i]))
4943 return -EINVAL;
4944 }
4945
4946 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4947 settings->cipher_group =
4948 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4949 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4950 settings->cipher_group))
4951 return -EINVAL;
4952 }
4953
4954 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4955 settings->wpa_versions =
4956 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4957 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4958 return -EINVAL;
4959 }
4960
4961 if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4962 void *data;
4963 int len;
4964
4965 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4966 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4967 settings->n_akm_suites = len / sizeof(u32);
4968
4969 if (len % sizeof(u32))
4970 return -EINVAL;
4971
4972 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4973 return -EINVAL;
4974
4975 memcpy(settings->akm_suites, data, len);
4976 }
4977
4978 return 0;
4979 }
4980
4981 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4982 {
4983 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4984 struct net_device *dev = info->user_ptr[1];
4985 struct cfg80211_crypto_settings crypto;
4986 struct ieee80211_channel *chan;
4987 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4988 int err, ssid_len, ie_len = 0;
4989 bool use_mfp = false;
4990 u32 flags = 0;
4991 struct ieee80211_ht_cap *ht_capa = NULL;
4992 struct ieee80211_ht_cap *ht_capa_mask = NULL;
4993
4994 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4995 return -EINVAL;
4996
4997 if (!info->attrs[NL80211_ATTR_MAC] ||
4998 !info->attrs[NL80211_ATTR_SSID] ||
4999 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5000 return -EINVAL;
5001
5002 if (!rdev->ops->assoc)
5003 return -EOPNOTSUPP;
5004
5005 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5006 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5007 return -EOPNOTSUPP;
5008
5009 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5010
5011 chan = ieee80211_get_channel(&rdev->wiphy,
5012 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5013 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5014 return -EINVAL;
5015
5016 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5017 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5018
5019 if (info->attrs[NL80211_ATTR_IE]) {
5020 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5021 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5022 }
5023
5024 if (info->attrs[NL80211_ATTR_USE_MFP]) {
5025 enum nl80211_mfp mfp =
5026 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5027 if (mfp == NL80211_MFP_REQUIRED)
5028 use_mfp = true;
5029 else if (mfp != NL80211_MFP_NO)
5030 return -EINVAL;
5031 }
5032
5033 if (info->attrs[NL80211_ATTR_PREV_BSSID])
5034 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5035
5036 if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5037 flags |= ASSOC_REQ_DISABLE_HT;
5038
5039 if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5040 ht_capa_mask =
5041 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5042
5043 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5044 if (!ht_capa_mask)
5045 return -EINVAL;
5046 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5047 }
5048
5049 err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5050 if (!err)
5051 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5052 ssid, ssid_len, ie, ie_len, use_mfp,
5053 &crypto, flags, ht_capa,
5054 ht_capa_mask);
5055
5056 return err;
5057 }
5058
5059 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5060 {
5061 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5062 struct net_device *dev = info->user_ptr[1];
5063 const u8 *ie = NULL, *bssid;
5064 int ie_len = 0;
5065 u16 reason_code;
5066 bool local_state_change;
5067
5068 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5069 return -EINVAL;
5070
5071 if (!info->attrs[NL80211_ATTR_MAC])
5072 return -EINVAL;
5073
5074 if (!info->attrs[NL80211_ATTR_REASON_CODE])
5075 return -EINVAL;
5076
5077 if (!rdev->ops->deauth)
5078 return -EOPNOTSUPP;
5079
5080 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5081 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5082 return -EOPNOTSUPP;
5083
5084 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5085
5086 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5087 if (reason_code == 0) {
5088 /* Reason Code 0 is reserved */
5089 return -EINVAL;
5090 }
5091
5092 if (info->attrs[NL80211_ATTR_IE]) {
5093 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5094 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5095 }
5096
5097 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5098
5099 return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5100 local_state_change);
5101 }
5102
5103 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5104 {
5105 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5106 struct net_device *dev = info->user_ptr[1];
5107 const u8 *ie = NULL, *bssid;
5108 int ie_len = 0;
5109 u16 reason_code;
5110 bool local_state_change;
5111
5112 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5113 return -EINVAL;
5114
5115 if (!info->attrs[NL80211_ATTR_MAC])
5116 return -EINVAL;
5117
5118 if (!info->attrs[NL80211_ATTR_REASON_CODE])
5119 return -EINVAL;
5120
5121 if (!rdev->ops->disassoc)
5122 return -EOPNOTSUPP;
5123
5124 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5125 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5126 return -EOPNOTSUPP;
5127
5128 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5129
5130 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5131 if (reason_code == 0) {
5132 /* Reason Code 0 is reserved */
5133 return -EINVAL;
5134 }
5135
5136 if (info->attrs[NL80211_ATTR_IE]) {
5137 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5138 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5139 }
5140
5141 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5142
5143 return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5144 local_state_change);
5145 }
5146
5147 static bool
5148 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5149 int mcast_rate[IEEE80211_NUM_BANDS],
5150 int rateval)
5151 {
5152 struct wiphy *wiphy = &rdev->wiphy;
5153 bool found = false;
5154 int band, i;
5155
5156 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5157 struct ieee80211_supported_band *sband;
5158
5159 sband = wiphy->bands[band];
5160 if (!sband)
5161 continue;
5162
5163 for (i = 0; i < sband->n_bitrates; i++) {
5164 if (sband->bitrates[i].bitrate == rateval) {
5165 mcast_rate[band] = i + 1;
5166 found = true;
5167 break;
5168 }
5169 }
5170 }
5171
5172 return found;
5173 }
5174
5175 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5176 {
5177 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5178 struct net_device *dev = info->user_ptr[1];
5179 struct cfg80211_ibss_params ibss;
5180 struct wiphy *wiphy;
5181 struct cfg80211_cached_keys *connkeys = NULL;
5182 int err;
5183
5184 memset(&ibss, 0, sizeof(ibss));
5185
5186 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5187 return -EINVAL;
5188
5189 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5190 !info->attrs[NL80211_ATTR_SSID] ||
5191 !nla_len(info->attrs[NL80211_ATTR_SSID]))
5192 return -EINVAL;
5193
5194 ibss.beacon_interval = 100;
5195
5196 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5197 ibss.beacon_interval =
5198 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5199 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5200 return -EINVAL;
5201 }
5202
5203 if (!rdev->ops->join_ibss)
5204 return -EOPNOTSUPP;
5205
5206 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5207 return -EOPNOTSUPP;
5208
5209 wiphy = &rdev->wiphy;
5210
5211 if (info->attrs[NL80211_ATTR_MAC]) {
5212 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5213
5214 if (!is_valid_ether_addr(ibss.bssid))
5215 return -EINVAL;
5216 }
5217 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5218 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5219
5220 if (info->attrs[NL80211_ATTR_IE]) {
5221 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5222 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5223 }
5224
5225 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5226 enum nl80211_channel_type channel_type;
5227
5228 if (!nl80211_valid_channel_type(info, &channel_type))
5229 return -EINVAL;
5230
5231 if (channel_type != NL80211_CHAN_NO_HT &&
5232 !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5233 return -EINVAL;
5234
5235 ibss.channel_type = channel_type;
5236 } else {
5237 ibss.channel_type = NL80211_CHAN_NO_HT;
5238 }
5239
5240 ibss.channel = rdev_freq_to_chan(rdev,
5241 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5242 ibss.channel_type);
5243 if (!ibss.channel ||
5244 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5245 ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5246 return -EINVAL;
5247
5248 /* Both channels should be able to initiate communication */
5249 if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5250 ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5251 !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5252 ibss.channel_type))
5253 return -EINVAL;
5254
5255 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5256 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5257
5258 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5259 u8 *rates =
5260 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5261 int n_rates =
5262 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5263 struct ieee80211_supported_band *sband =
5264 wiphy->bands[ibss.channel->band];
5265
5266 err = ieee80211_get_ratemask(sband, rates, n_rates,
5267 &ibss.basic_rates);
5268 if (err)
5269 return err;
5270 }
5271
5272 if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5273 !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5274 nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5275 return -EINVAL;
5276
5277 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5278 connkeys = nl80211_parse_connkeys(rdev,
5279 info->attrs[NL80211_ATTR_KEYS]);
5280 if (IS_ERR(connkeys))
5281 return PTR_ERR(connkeys);
5282 }
5283
5284 ibss.control_port =
5285 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5286
5287 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5288 if (err)
5289 kfree(connkeys);
5290 return err;
5291 }
5292
5293 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5294 {
5295 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5296 struct net_device *dev = info->user_ptr[1];
5297
5298 if (!rdev->ops->leave_ibss)
5299 return -EOPNOTSUPP;
5300
5301 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5302 return -EOPNOTSUPP;
5303
5304 return cfg80211_leave_ibss(rdev, dev, false);
5305 }
5306
5307 #ifdef CONFIG_NL80211_TESTMODE
5308 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5309 .name = "testmode",
5310 };
5311
5312 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5313 {
5314 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5315 int err;
5316
5317 if (!info->attrs[NL80211_ATTR_TESTDATA])
5318 return -EINVAL;
5319
5320 err = -EOPNOTSUPP;
5321 if (rdev->ops->testmode_cmd) {
5322 rdev->testmode_info = info;
5323 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5324 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5325 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5326 rdev->testmode_info = NULL;
5327 }
5328
5329 return err;
5330 }
5331
5332 static int nl80211_testmode_dump(struct sk_buff *skb,
5333 struct netlink_callback *cb)
5334 {
5335 struct cfg80211_registered_device *rdev;
5336 int err;
5337 long phy_idx;
5338 void *data = NULL;
5339 int data_len = 0;
5340
5341 if (cb->args[0]) {
5342 /*
5343 * 0 is a valid index, but not valid for args[0],
5344 * so we need to offset by 1.
5345 */
5346 phy_idx = cb->args[0] - 1;
5347 } else {
5348 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5349 nl80211_fam.attrbuf, nl80211_fam.maxattr,
5350 nl80211_policy);
5351 if (err)
5352 return err;
5353
5354 mutex_lock(&cfg80211_mutex);
5355 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5356 nl80211_fam.attrbuf);
5357 if (IS_ERR(rdev)) {
5358 mutex_unlock(&cfg80211_mutex);
5359 return PTR_ERR(rdev);
5360 }
5361 phy_idx = rdev->wiphy_idx;
5362 rdev = NULL;
5363 mutex_unlock(&cfg80211_mutex);
5364
5365 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5366 cb->args[1] =
5367 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5368 }
5369
5370 if (cb->args[1]) {
5371 data = nla_data((void *)cb->args[1]);
5372 data_len = nla_len((void *)cb->args[1]);
5373 }
5374
5375 mutex_lock(&cfg80211_mutex);
5376 rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5377 if (!rdev) {
5378 mutex_unlock(&cfg80211_mutex);
5379 return -ENOENT;
5380 }
5381 cfg80211_lock_rdev(rdev);
5382 mutex_unlock(&cfg80211_mutex);
5383
5384 if (!rdev->ops->testmode_dump) {
5385 err = -EOPNOTSUPP;
5386 goto out_err;
5387 }
5388
5389 while (1) {
5390 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5391 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5392 NL80211_CMD_TESTMODE);
5393 struct nlattr *tmdata;
5394
5395 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5396 genlmsg_cancel(skb, hdr);
5397 break;
5398 }
5399
5400 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5401 if (!tmdata) {
5402 genlmsg_cancel(skb, hdr);
5403 break;
5404 }
5405 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5406 data, data_len);
5407 nla_nest_end(skb, tmdata);
5408
5409 if (err == -ENOBUFS || err == -ENOENT) {
5410 genlmsg_cancel(skb, hdr);
5411 break;
5412 } else if (err) {
5413 genlmsg_cancel(skb, hdr);
5414 goto out_err;
5415 }
5416
5417 genlmsg_end(skb, hdr);
5418 }
5419
5420 err = skb->len;
5421 /* see above */
5422 cb->args[0] = phy_idx + 1;
5423 out_err:
5424 cfg80211_unlock_rdev(rdev);
5425 return err;
5426 }
5427
5428 static struct sk_buff *
5429 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5430 int approxlen, u32 pid, u32 seq, gfp_t gfp)
5431 {
5432 struct sk_buff *skb;
5433 void *hdr;
5434 struct nlattr *data;
5435
5436 skb = nlmsg_new(approxlen + 100, gfp);
5437 if (!skb)
5438 return NULL;
5439
5440 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5441 if (!hdr) {
5442 kfree_skb(skb);
5443 return NULL;
5444 }
5445
5446 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5447 goto nla_put_failure;
5448 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5449
5450 ((void **)skb->cb)[0] = rdev;
5451 ((void **)skb->cb)[1] = hdr;
5452 ((void **)skb->cb)[2] = data;
5453
5454 return skb;
5455
5456 nla_put_failure:
5457 kfree_skb(skb);
5458 return NULL;
5459 }
5460
5461 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5462 int approxlen)
5463 {
5464 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5465
5466 if (WARN_ON(!rdev->testmode_info))
5467 return NULL;
5468
5469 return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5470 rdev->testmode_info->snd_pid,
5471 rdev->testmode_info->snd_seq,
5472 GFP_KERNEL);
5473 }
5474 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5475
5476 int cfg80211_testmode_reply(struct sk_buff *skb)
5477 {
5478 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5479 void *hdr = ((void **)skb->cb)[1];
5480 struct nlattr *data = ((void **)skb->cb)[2];
5481
5482 if (WARN_ON(!rdev->testmode_info)) {
5483 kfree_skb(skb);
5484 return -EINVAL;
5485 }
5486
5487 nla_nest_end(skb, data);
5488 genlmsg_end(skb, hdr);
5489 return genlmsg_reply(skb, rdev->testmode_info);
5490 }
5491 EXPORT_SYMBOL(cfg80211_testmode_reply);
5492
5493 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5494 int approxlen, gfp_t gfp)
5495 {
5496 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5497
5498 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5499 }
5500 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5501
5502 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5503 {
5504 void *hdr = ((void **)skb->cb)[1];
5505 struct nlattr *data = ((void **)skb->cb)[2];
5506
5507 nla_nest_end(skb, data);
5508 genlmsg_end(skb, hdr);
5509 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5510 }
5511 EXPORT_SYMBOL(cfg80211_testmode_event);
5512 #endif
5513
5514 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5515 {
5516 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5517 struct net_device *dev = info->user_ptr[1];
5518 struct cfg80211_connect_params connect;
5519 struct wiphy *wiphy;
5520 struct cfg80211_cached_keys *connkeys = NULL;
5521 int err;
5522
5523 memset(&connect, 0, sizeof(connect));
5524
5525 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5526 return -EINVAL;
5527
5528 if (!info->attrs[NL80211_ATTR_SSID] ||
5529 !nla_len(info->attrs[NL80211_ATTR_SSID]))
5530 return -EINVAL;
5531
5532 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5533 connect.auth_type =
5534 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5535 if (!nl80211_valid_auth_type(connect.auth_type))
5536 return -EINVAL;
5537 } else
5538 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5539
5540 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5541
5542 err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5543 NL80211_MAX_NR_CIPHER_SUITES);
5544 if (err)
5545 return err;
5546
5547 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5548 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5549 return -EOPNOTSUPP;
5550
5551 wiphy = &rdev->wiphy;
5552
5553 connect.bg_scan_period = -1;
5554 if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5555 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5556 connect.bg_scan_period =
5557 nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5558 }
5559
5560 if (info->attrs[NL80211_ATTR_MAC])
5561 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5562 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5563 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5564
5565 if (info->attrs[NL80211_ATTR_IE]) {
5566 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5567 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5568 }
5569
5570 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5571 connect.channel =
5572 ieee80211_get_channel(wiphy,
5573 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5574 if (!connect.channel ||
5575 connect.channel->flags & IEEE80211_CHAN_DISABLED)
5576 return -EINVAL;
5577 }
5578
5579 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5580 connkeys = nl80211_parse_connkeys(rdev,
5581 info->attrs[NL80211_ATTR_KEYS]);
5582 if (IS_ERR(connkeys))
5583 return PTR_ERR(connkeys);
5584 }
5585
5586 if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5587 connect.flags |= ASSOC_REQ_DISABLE_HT;
5588
5589 if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5590 memcpy(&connect.ht_capa_mask,
5591 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5592 sizeof(connect.ht_capa_mask));
5593
5594 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5595 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5596 return -EINVAL;
5597 memcpy(&connect.ht_capa,
5598 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5599 sizeof(connect.ht_capa));
5600 }
5601
5602 err = cfg80211_connect(rdev, dev, &connect, connkeys);
5603 if (err)
5604 kfree(connkeys);
5605 return err;
5606 }
5607
5608 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5609 {
5610 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5611 struct net_device *dev = info->user_ptr[1];
5612 u16 reason;
5613
5614 if (!info->attrs[NL80211_ATTR_REASON_CODE])
5615 reason = WLAN_REASON_DEAUTH_LEAVING;
5616 else
5617 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5618
5619 if (reason == 0)
5620 return -EINVAL;
5621
5622 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5623 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5624 return -EOPNOTSUPP;
5625
5626 return cfg80211_disconnect(rdev, dev, reason, true);
5627 }
5628
5629 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5630 {
5631 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5632 struct net *net;
5633 int err;
5634 u32 pid;
5635
5636 if (!info->attrs[NL80211_ATTR_PID])
5637 return -EINVAL;
5638
5639 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5640
5641 net = get_net_ns_by_pid(pid);
5642 if (IS_ERR(net))
5643 return PTR_ERR(net);
5644
5645 err = 0;
5646
5647 /* check if anything to do */
5648 if (!net_eq(wiphy_net(&rdev->wiphy), net))
5649 err = cfg80211_switch_netns(rdev, net);
5650
5651 put_net(net);
5652 return err;
5653 }
5654
5655 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5656 {
5657 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5658 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5659 struct cfg80211_pmksa *pmksa) = NULL;
5660 struct net_device *dev = info->user_ptr[1];
5661 struct cfg80211_pmksa pmksa;
5662
5663 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5664
5665 if (!info->attrs[NL80211_ATTR_MAC])
5666 return -EINVAL;
5667
5668 if (!info->attrs[NL80211_ATTR_PMKID])
5669 return -EINVAL;
5670
5671 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5672 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5673
5674 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5675 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5676 return -EOPNOTSUPP;
5677
5678 switch (info->genlhdr->cmd) {
5679 case NL80211_CMD_SET_PMKSA:
5680 rdev_ops = rdev->ops->set_pmksa;
5681 break;
5682 case NL80211_CMD_DEL_PMKSA:
5683 rdev_ops = rdev->ops->del_pmksa;
5684 break;
5685 default:
5686 WARN_ON(1);
5687 break;
5688 }
5689
5690 if (!rdev_ops)
5691 return -EOPNOTSUPP;
5692
5693 return rdev_ops(&rdev->wiphy, dev, &pmksa);
5694 }
5695
5696 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5697 {
5698 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5699 struct net_device *dev = info->user_ptr[1];
5700
5701 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5702 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5703 return -EOPNOTSUPP;
5704
5705 if (!rdev->ops->flush_pmksa)
5706 return -EOPNOTSUPP;
5707
5708 return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5709 }
5710
5711 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5712 {
5713 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5714 struct net_device *dev = info->user_ptr[1];
5715 u8 action_code, dialog_token;
5716 u16 status_code;
5717 u8 *peer;
5718
5719 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5720 !rdev->ops->tdls_mgmt)
5721 return -EOPNOTSUPP;
5722
5723 if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5724 !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5725 !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5726 !info->attrs[NL80211_ATTR_IE] ||
5727 !info->attrs[NL80211_ATTR_MAC])
5728 return -EINVAL;
5729
5730 peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5731 action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5732 status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5733 dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5734
5735 return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5736 dialog_token, status_code,
5737 nla_data(info->attrs[NL80211_ATTR_IE]),
5738 nla_len(info->attrs[NL80211_ATTR_IE]));
5739 }
5740
5741 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5742 {
5743 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5744 struct net_device *dev = info->user_ptr[1];
5745 enum nl80211_tdls_operation operation;
5746 u8 *peer;
5747
5748 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5749 !rdev->ops->tdls_oper)
5750 return -EOPNOTSUPP;
5751
5752 if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5753 !info->attrs[NL80211_ATTR_MAC])
5754 return -EINVAL;
5755
5756 operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5757 peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5758
5759 return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5760 }
5761
5762 static int nl80211_remain_on_channel(struct sk_buff *skb,
5763 struct genl_info *info)
5764 {
5765 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5766 struct wireless_dev *wdev = info->user_ptr[1];
5767 struct ieee80211_channel *chan;
5768 struct sk_buff *msg;
5769 void *hdr;
5770 u64 cookie;
5771 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5772 u32 freq, duration;
5773 int err;
5774
5775 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5776 !info->attrs[NL80211_ATTR_DURATION])
5777 return -EINVAL;
5778
5779 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5780
5781 if (!rdev->ops->remain_on_channel ||
5782 !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5783 return -EOPNOTSUPP;
5784
5785 /*
5786 * We should be on that channel for at least a minimum amount of
5787 * time (10ms) but no longer than the driver supports.
5788 */
5789 if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5790 duration > rdev->wiphy.max_remain_on_channel_duration)
5791 return -EINVAL;
5792
5793 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5794 !nl80211_valid_channel_type(info, &channel_type))
5795 return -EINVAL;
5796
5797 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5798 chan = rdev_freq_to_chan(rdev, freq, channel_type);
5799 if (chan == NULL)
5800 return -EINVAL;
5801
5802 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5803 if (!msg)
5804 return -ENOMEM;
5805
5806 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5807 NL80211_CMD_REMAIN_ON_CHANNEL);
5808
5809 if (IS_ERR(hdr)) {
5810 err = PTR_ERR(hdr);
5811 goto free_msg;
5812 }
5813
5814 err = rdev->ops->remain_on_channel(&rdev->wiphy, wdev, chan,
5815 channel_type, duration, &cookie);
5816
5817 if (err)
5818 goto free_msg;
5819
5820 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5821 goto nla_put_failure;
5822
5823 genlmsg_end(msg, hdr);
5824
5825 return genlmsg_reply(msg, info);
5826
5827 nla_put_failure:
5828 err = -ENOBUFS;
5829 free_msg:
5830 nlmsg_free(msg);
5831 return err;
5832 }
5833
5834 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5835 struct genl_info *info)
5836 {
5837 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5838 struct wireless_dev *wdev = info->user_ptr[1];
5839 u64 cookie;
5840
5841 if (!info->attrs[NL80211_ATTR_COOKIE])
5842 return -EINVAL;
5843
5844 if (!rdev->ops->cancel_remain_on_channel)
5845 return -EOPNOTSUPP;
5846
5847 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5848
5849 return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, wdev, cookie);
5850 }
5851
5852 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5853 u8 *rates, u8 rates_len)
5854 {
5855 u8 i;
5856 u32 mask = 0;
5857
5858 for (i = 0; i < rates_len; i++) {
5859 int rate = (rates[i] & 0x7f) * 5;
5860 int ridx;
5861 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5862 struct ieee80211_rate *srate =
5863 &sband->bitrates[ridx];
5864 if (rate == srate->bitrate) {
5865 mask |= 1 << ridx;
5866 break;
5867 }
5868 }
5869 if (ridx == sband->n_bitrates)
5870 return 0; /* rate not found */
5871 }
5872
5873 return mask;
5874 }
5875
5876 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5877 u8 *rates, u8 rates_len,
5878 u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5879 {
5880 u8 i;
5881
5882 memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5883
5884 for (i = 0; i < rates_len; i++) {
5885 int ridx, rbit;
5886
5887 ridx = rates[i] / 8;
5888 rbit = BIT(rates[i] % 8);
5889
5890 /* check validity */
5891 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5892 return false;
5893
5894 /* check availability */
5895 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5896 mcs[ridx] |= rbit;
5897 else
5898 return false;
5899 }
5900
5901 return true;
5902 }
5903
5904 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5905 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5906 .len = NL80211_MAX_SUPP_RATES },
5907 [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5908 .len = NL80211_MAX_SUPP_HT_RATES },
5909 };
5910
5911 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5912 struct genl_info *info)
5913 {
5914 struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5915 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5916 struct cfg80211_bitrate_mask mask;
5917 int rem, i;
5918 struct net_device *dev = info->user_ptr[1];
5919 struct nlattr *tx_rates;
5920 struct ieee80211_supported_band *sband;
5921
5922 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5923 return -EINVAL;
5924
5925 if (!rdev->ops->set_bitrate_mask)
5926 return -EOPNOTSUPP;
5927
5928 memset(&mask, 0, sizeof(mask));
5929 /* Default to all rates enabled */
5930 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5931 sband = rdev->wiphy.bands[i];
5932 mask.control[i].legacy =
5933 sband ? (1 << sband->n_bitrates) - 1 : 0;
5934 if (sband)
5935 memcpy(mask.control[i].mcs,
5936 sband->ht_cap.mcs.rx_mask,
5937 sizeof(mask.control[i].mcs));
5938 else
5939 memset(mask.control[i].mcs, 0,
5940 sizeof(mask.control[i].mcs));
5941 }
5942
5943 /*
5944 * The nested attribute uses enum nl80211_band as the index. This maps
5945 * directly to the enum ieee80211_band values used in cfg80211.
5946 */
5947 BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5948 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5949 {
5950 enum ieee80211_band band = nla_type(tx_rates);
5951 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5952 return -EINVAL;
5953 sband = rdev->wiphy.bands[band];
5954 if (sband == NULL)
5955 return -EINVAL;
5956 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5957 nla_len(tx_rates), nl80211_txattr_policy);
5958 if (tb[NL80211_TXRATE_LEGACY]) {
5959 mask.control[band].legacy = rateset_to_mask(
5960 sband,
5961 nla_data(tb[NL80211_TXRATE_LEGACY]),
5962 nla_len(tb[NL80211_TXRATE_LEGACY]));
5963 if ((mask.control[band].legacy == 0) &&
5964 nla_len(tb[NL80211_TXRATE_LEGACY]))
5965 return -EINVAL;
5966 }
5967 if (tb[NL80211_TXRATE_MCS]) {
5968 if (!ht_rateset_to_mask(
5969 sband,
5970 nla_data(tb[NL80211_TXRATE_MCS]),
5971 nla_len(tb[NL80211_TXRATE_MCS]),
5972 mask.control[band].mcs))
5973 return -EINVAL;
5974 }
5975
5976 if (mask.control[band].legacy == 0) {
5977 /* don't allow empty legacy rates if HT
5978 * is not even supported. */
5979 if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5980 return -EINVAL;
5981
5982 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5983 if (mask.control[band].mcs[i])
5984 break;
5985
5986 /* legacy and mcs rates may not be both empty */
5987 if (i == IEEE80211_HT_MCS_MASK_LEN)
5988 return -EINVAL;
5989 }
5990 }
5991
5992 return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5993 }
5994
5995 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5996 {
5997 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5998 struct wireless_dev *wdev = info->user_ptr[1];
5999 u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6000
6001 if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6002 return -EINVAL;
6003
6004 if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6005 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6006
6007 switch (wdev->iftype) {
6008 case NL80211_IFTYPE_STATION:
6009 case NL80211_IFTYPE_ADHOC:
6010 case NL80211_IFTYPE_P2P_CLIENT:
6011 case NL80211_IFTYPE_AP:
6012 case NL80211_IFTYPE_AP_VLAN:
6013 case NL80211_IFTYPE_MESH_POINT:
6014 case NL80211_IFTYPE_P2P_GO:
6015 break;
6016 default:
6017 return -EOPNOTSUPP;
6018 }
6019
6020 /* not much point in registering if we can't reply */
6021 if (!rdev->ops->mgmt_tx)
6022 return -EOPNOTSUPP;
6023
6024 return cfg80211_mlme_register_mgmt(wdev, info->snd_pid, frame_type,
6025 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6026 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6027 }
6028
6029 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6030 {
6031 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6032 struct wireless_dev *wdev = info->user_ptr[1];
6033 struct ieee80211_channel *chan;
6034 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6035 bool channel_type_valid = false;
6036 u32 freq;
6037 int err;
6038 void *hdr = NULL;
6039 u64 cookie;
6040 struct sk_buff *msg = NULL;
6041 unsigned int wait = 0;
6042 bool offchan, no_cck, dont_wait_for_ack;
6043
6044 dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6045
6046 if (!info->attrs[NL80211_ATTR_FRAME] ||
6047 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6048 return -EINVAL;
6049
6050 if (!rdev->ops->mgmt_tx)
6051 return -EOPNOTSUPP;
6052
6053 switch (wdev->iftype) {
6054 case NL80211_IFTYPE_STATION:
6055 case NL80211_IFTYPE_ADHOC:
6056 case NL80211_IFTYPE_P2P_CLIENT:
6057 case NL80211_IFTYPE_AP:
6058 case NL80211_IFTYPE_AP_VLAN:
6059 case NL80211_IFTYPE_MESH_POINT:
6060 case NL80211_IFTYPE_P2P_GO:
6061 break;
6062 default:
6063 return -EOPNOTSUPP;
6064 }
6065
6066 if (info->attrs[NL80211_ATTR_DURATION]) {
6067 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6068 return -EINVAL;
6069 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6070
6071 /*
6072 * We should wait on the channel for at least a minimum amount
6073 * of time (10ms) but no longer than the driver supports.
6074 */
6075 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6076 wait > rdev->wiphy.max_remain_on_channel_duration)
6077 return -EINVAL;
6078
6079 }
6080
6081 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
6082 if (!nl80211_valid_channel_type(info, &channel_type))
6083 return -EINVAL;
6084 channel_type_valid = true;
6085 }
6086
6087 offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6088
6089 if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6090 return -EINVAL;
6091
6092 no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6093
6094 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6095 chan = rdev_freq_to_chan(rdev, freq, channel_type);
6096 if (chan == NULL)
6097 return -EINVAL;
6098
6099 if (!dont_wait_for_ack) {
6100 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6101 if (!msg)
6102 return -ENOMEM;
6103
6104 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6105 NL80211_CMD_FRAME);
6106
6107 if (IS_ERR(hdr)) {
6108 err = PTR_ERR(hdr);
6109 goto free_msg;
6110 }
6111 }
6112
6113 err = cfg80211_mlme_mgmt_tx(rdev, wdev, chan, offchan, channel_type,
6114 channel_type_valid, wait,
6115 nla_data(info->attrs[NL80211_ATTR_FRAME]),
6116 nla_len(info->attrs[NL80211_ATTR_FRAME]),
6117 no_cck, dont_wait_for_ack, &cookie);
6118 if (err)
6119 goto free_msg;
6120
6121 if (msg) {
6122 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6123 goto nla_put_failure;
6124
6125 genlmsg_end(msg, hdr);
6126 return genlmsg_reply(msg, info);
6127 }
6128
6129 return 0;
6130
6131 nla_put_failure:
6132 err = -ENOBUFS;
6133 free_msg:
6134 nlmsg_free(msg);
6135 return err;
6136 }
6137
6138 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6139 {
6140 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6141 struct wireless_dev *wdev = info->user_ptr[1];
6142 u64 cookie;
6143
6144 if (!info->attrs[NL80211_ATTR_COOKIE])
6145 return -EINVAL;
6146
6147 if (!rdev->ops->mgmt_tx_cancel_wait)
6148 return -EOPNOTSUPP;
6149
6150 switch (wdev->iftype) {
6151 case NL80211_IFTYPE_STATION:
6152 case NL80211_IFTYPE_ADHOC:
6153 case NL80211_IFTYPE_P2P_CLIENT:
6154 case NL80211_IFTYPE_AP:
6155 case NL80211_IFTYPE_AP_VLAN:
6156 case NL80211_IFTYPE_P2P_GO:
6157 break;
6158 default:
6159 return -EOPNOTSUPP;
6160 }
6161
6162 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6163
6164 return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, wdev, cookie);
6165 }
6166
6167 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6168 {
6169 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6170 struct wireless_dev *wdev;
6171 struct net_device *dev = info->user_ptr[1];
6172 u8 ps_state;
6173 bool state;
6174 int err;
6175
6176 if (!info->attrs[NL80211_ATTR_PS_STATE])
6177 return -EINVAL;
6178
6179 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6180
6181 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6182 return -EINVAL;
6183
6184 wdev = dev->ieee80211_ptr;
6185
6186 if (!rdev->ops->set_power_mgmt)
6187 return -EOPNOTSUPP;
6188
6189 state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6190
6191 if (state == wdev->ps)
6192 return 0;
6193
6194 err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6195 wdev->ps_timeout);
6196 if (!err)
6197 wdev->ps = state;
6198 return err;
6199 }
6200
6201 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6202 {
6203 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6204 enum nl80211_ps_state ps_state;
6205 struct wireless_dev *wdev;
6206 struct net_device *dev = info->user_ptr[1];
6207 struct sk_buff *msg;
6208 void *hdr;
6209 int err;
6210
6211 wdev = dev->ieee80211_ptr;
6212
6213 if (!rdev->ops->set_power_mgmt)
6214 return -EOPNOTSUPP;
6215
6216 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6217 if (!msg)
6218 return -ENOMEM;
6219
6220 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6221 NL80211_CMD_GET_POWER_SAVE);
6222 if (!hdr) {
6223 err = -ENOBUFS;
6224 goto free_msg;
6225 }
6226
6227 if (wdev->ps)
6228 ps_state = NL80211_PS_ENABLED;
6229 else
6230 ps_state = NL80211_PS_DISABLED;
6231
6232 if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6233 goto nla_put_failure;
6234
6235 genlmsg_end(msg, hdr);
6236 return genlmsg_reply(msg, info);
6237
6238 nla_put_failure:
6239 err = -ENOBUFS;
6240 free_msg:
6241 nlmsg_free(msg);
6242 return err;
6243 }
6244
6245 static struct nla_policy
6246 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6247 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6248 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6249 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6250 };
6251
6252 static int nl80211_set_cqm_rssi(struct genl_info *info,
6253 s32 threshold, u32 hysteresis)
6254 {
6255 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6256 struct wireless_dev *wdev;
6257 struct net_device *dev = info->user_ptr[1];
6258
6259 if (threshold > 0)
6260 return -EINVAL;
6261
6262 wdev = dev->ieee80211_ptr;
6263
6264 if (!rdev->ops->set_cqm_rssi_config)
6265 return -EOPNOTSUPP;
6266
6267 if (wdev->iftype != NL80211_IFTYPE_STATION &&
6268 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6269 return -EOPNOTSUPP;
6270
6271 return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6272 threshold, hysteresis);
6273 }
6274
6275 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6276 {
6277 struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6278 struct nlattr *cqm;
6279 int err;
6280
6281 cqm = info->attrs[NL80211_ATTR_CQM];
6282 if (!cqm) {
6283 err = -EINVAL;
6284 goto out;
6285 }
6286
6287 err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6288 nl80211_attr_cqm_policy);
6289 if (err)
6290 goto out;
6291
6292 if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6293 attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6294 s32 threshold;
6295 u32 hysteresis;
6296 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6297 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6298 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6299 } else
6300 err = -EINVAL;
6301
6302 out:
6303 return err;
6304 }
6305
6306 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6307 {
6308 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6309 struct net_device *dev = info->user_ptr[1];
6310 struct mesh_config cfg;
6311 struct mesh_setup setup;
6312 int err;
6313
6314 /* start with default */
6315 memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6316 memcpy(&setup, &default_mesh_setup, sizeof(setup));
6317
6318 if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6319 /* and parse parameters if given */
6320 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6321 if (err)
6322 return err;
6323 }
6324
6325 if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6326 !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6327 return -EINVAL;
6328
6329 setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6330 setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6331
6332 if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6333 !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6334 nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6335 return -EINVAL;
6336
6337 if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6338 /* parse additional setup parameters if given */
6339 err = nl80211_parse_mesh_setup(info, &setup);
6340 if (err)
6341 return err;
6342 }
6343
6344 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6345 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6346
6347 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6348 !nl80211_valid_channel_type(info, &channel_type))
6349 return -EINVAL;
6350
6351 setup.channel = rdev_freq_to_chan(rdev,
6352 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6353 channel_type);
6354 if (!setup.channel)
6355 return -EINVAL;
6356 setup.channel_type = channel_type;
6357 } else {
6358 /* cfg80211_join_mesh() will sort it out */
6359 setup.channel = NULL;
6360 }
6361
6362 return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6363 }
6364
6365 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6366 {
6367 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6368 struct net_device *dev = info->user_ptr[1];
6369
6370 return cfg80211_leave_mesh(rdev, dev);
6371 }
6372
6373 #ifdef CONFIG_PM
6374 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6375 {
6376 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6377 struct sk_buff *msg;
6378 void *hdr;
6379
6380 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6381 return -EOPNOTSUPP;
6382
6383 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6384 if (!msg)
6385 return -ENOMEM;
6386
6387 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6388 NL80211_CMD_GET_WOWLAN);
6389 if (!hdr)
6390 goto nla_put_failure;
6391
6392 if (rdev->wowlan) {
6393 struct nlattr *nl_wowlan;
6394
6395 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6396 if (!nl_wowlan)
6397 goto nla_put_failure;
6398
6399 if ((rdev->wowlan->any &&
6400 nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6401 (rdev->wowlan->disconnect &&
6402 nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6403 (rdev->wowlan->magic_pkt &&
6404 nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6405 (rdev->wowlan->gtk_rekey_failure &&
6406 nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6407 (rdev->wowlan->eap_identity_req &&
6408 nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6409 (rdev->wowlan->four_way_handshake &&
6410 nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6411 (rdev->wowlan->rfkill_release &&
6412 nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6413 goto nla_put_failure;
6414 if (rdev->wowlan->n_patterns) {
6415 struct nlattr *nl_pats, *nl_pat;
6416 int i, pat_len;
6417
6418 nl_pats = nla_nest_start(msg,
6419 NL80211_WOWLAN_TRIG_PKT_PATTERN);
6420 if (!nl_pats)
6421 goto nla_put_failure;
6422
6423 for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6424 nl_pat = nla_nest_start(msg, i + 1);
6425 if (!nl_pat)
6426 goto nla_put_failure;
6427 pat_len = rdev->wowlan->patterns[i].pattern_len;
6428 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6429 DIV_ROUND_UP(pat_len, 8),
6430 rdev->wowlan->patterns[i].mask) ||
6431 nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6432 pat_len,
6433 rdev->wowlan->patterns[i].pattern))
6434 goto nla_put_failure;
6435 nla_nest_end(msg, nl_pat);
6436 }
6437 nla_nest_end(msg, nl_pats);
6438 }
6439
6440 nla_nest_end(msg, nl_wowlan);
6441 }
6442
6443 genlmsg_end(msg, hdr);
6444 return genlmsg_reply(msg, info);
6445
6446 nla_put_failure:
6447 nlmsg_free(msg);
6448 return -ENOBUFS;
6449 }
6450
6451 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6452 {
6453 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6454 struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6455 struct cfg80211_wowlan no_triggers = {};
6456 struct cfg80211_wowlan new_triggers = {};
6457 struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6458 int err, i;
6459 bool prev_enabled = rdev->wowlan;
6460
6461 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6462 return -EOPNOTSUPP;
6463
6464 if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6465 goto no_triggers;
6466
6467 err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6468 nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6469 nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6470 nl80211_wowlan_policy);
6471 if (err)
6472 return err;
6473
6474 if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6475 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6476 return -EINVAL;
6477 new_triggers.any = true;
6478 }
6479
6480 if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6481 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6482 return -EINVAL;
6483 new_triggers.disconnect = true;
6484 }
6485
6486 if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6487 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6488 return -EINVAL;
6489 new_triggers.magic_pkt = true;
6490 }
6491
6492 if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6493 return -EINVAL;
6494
6495 if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6496 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6497 return -EINVAL;
6498 new_triggers.gtk_rekey_failure = true;
6499 }
6500
6501 if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6502 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6503 return -EINVAL;
6504 new_triggers.eap_identity_req = true;
6505 }
6506
6507 if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6508 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6509 return -EINVAL;
6510 new_triggers.four_way_handshake = true;
6511 }
6512
6513 if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6514 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6515 return -EINVAL;
6516 new_triggers.rfkill_release = true;
6517 }
6518
6519 if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6520 struct nlattr *pat;
6521 int n_patterns = 0;
6522 int rem, pat_len, mask_len;
6523 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6524
6525 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6526 rem)
6527 n_patterns++;
6528 if (n_patterns > wowlan->n_patterns)
6529 return -EINVAL;
6530
6531 new_triggers.patterns = kcalloc(n_patterns,
6532 sizeof(new_triggers.patterns[0]),
6533 GFP_KERNEL);
6534 if (!new_triggers.patterns)
6535 return -ENOMEM;
6536
6537 new_triggers.n_patterns = n_patterns;
6538 i = 0;
6539
6540 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6541 rem) {
6542 nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6543 nla_data(pat), nla_len(pat), NULL);
6544 err = -EINVAL;
6545 if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6546 !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6547 goto error;
6548 pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6549 mask_len = DIV_ROUND_UP(pat_len, 8);
6550 if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6551 mask_len)
6552 goto error;
6553 if (pat_len > wowlan->pattern_max_len ||
6554 pat_len < wowlan->pattern_min_len)
6555 goto error;
6556
6557 new_triggers.patterns[i].mask =
6558 kmalloc(mask_len + pat_len, GFP_KERNEL);
6559 if (!new_triggers.patterns[i].mask) {
6560 err = -ENOMEM;
6561 goto error;
6562 }
6563 new_triggers.patterns[i].pattern =
6564 new_triggers.patterns[i].mask + mask_len;
6565 memcpy(new_triggers.patterns[i].mask,
6566 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6567 mask_len);
6568 new_triggers.patterns[i].pattern_len = pat_len;
6569 memcpy(new_triggers.patterns[i].pattern,
6570 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6571 pat_len);
6572 i++;
6573 }
6574 }
6575
6576 if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6577 struct cfg80211_wowlan *ntrig;
6578 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6579 GFP_KERNEL);
6580 if (!ntrig) {
6581 err = -ENOMEM;
6582 goto error;
6583 }
6584 cfg80211_rdev_free_wowlan(rdev);
6585 rdev->wowlan = ntrig;
6586 } else {
6587 no_triggers:
6588 cfg80211_rdev_free_wowlan(rdev);
6589 rdev->wowlan = NULL;
6590 }
6591
6592 if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6593 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6594
6595 return 0;
6596 error:
6597 for (i = 0; i < new_triggers.n_patterns; i++)
6598 kfree(new_triggers.patterns[i].mask);
6599 kfree(new_triggers.patterns);
6600 return err;
6601 }
6602 #endif
6603
6604 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6605 {
6606 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6607 struct net_device *dev = info->user_ptr[1];
6608 struct wireless_dev *wdev = dev->ieee80211_ptr;
6609 struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6610 struct cfg80211_gtk_rekey_data rekey_data;
6611 int err;
6612
6613 if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6614 return -EINVAL;
6615
6616 err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6617 nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6618 nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6619 nl80211_rekey_policy);
6620 if (err)
6621 return err;
6622
6623 if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6624 return -ERANGE;
6625 if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6626 return -ERANGE;
6627 if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6628 return -ERANGE;
6629
6630 memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6631 NL80211_KEK_LEN);
6632 memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6633 NL80211_KCK_LEN);
6634 memcpy(rekey_data.replay_ctr,
6635 nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6636 NL80211_REPLAY_CTR_LEN);
6637
6638 wdev_lock(wdev);
6639 if (!wdev->current_bss) {
6640 err = -ENOTCONN;
6641 goto out;
6642 }
6643
6644 if (!rdev->ops->set_rekey_data) {
6645 err = -EOPNOTSUPP;
6646 goto out;
6647 }
6648
6649 err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6650 out:
6651 wdev_unlock(wdev);
6652 return err;
6653 }
6654
6655 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6656 struct genl_info *info)
6657 {
6658 struct net_device *dev = info->user_ptr[1];
6659 struct wireless_dev *wdev = dev->ieee80211_ptr;
6660
6661 if (wdev->iftype != NL80211_IFTYPE_AP &&
6662 wdev->iftype != NL80211_IFTYPE_P2P_GO)
6663 return -EINVAL;
6664
6665 if (wdev->ap_unexpected_nlpid)
6666 return -EBUSY;
6667
6668 wdev->ap_unexpected_nlpid = info->snd_pid;
6669 return 0;
6670 }
6671
6672 static int nl80211_probe_client(struct sk_buff *skb,
6673 struct genl_info *info)
6674 {
6675 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6676 struct net_device *dev = info->user_ptr[1];
6677 struct wireless_dev *wdev = dev->ieee80211_ptr;
6678 struct sk_buff *msg;
6679 void *hdr;
6680 const u8 *addr;
6681 u64 cookie;
6682 int err;
6683
6684 if (wdev->iftype != NL80211_IFTYPE_AP &&
6685 wdev->iftype != NL80211_IFTYPE_P2P_GO)
6686 return -EOPNOTSUPP;
6687
6688 if (!info->attrs[NL80211_ATTR_MAC])
6689 return -EINVAL;
6690
6691 if (!rdev->ops->probe_client)
6692 return -EOPNOTSUPP;
6693
6694 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6695 if (!msg)
6696 return -ENOMEM;
6697
6698 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6699 NL80211_CMD_PROBE_CLIENT);
6700
6701 if (IS_ERR(hdr)) {
6702 err = PTR_ERR(hdr);
6703 goto free_msg;
6704 }
6705
6706 addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6707
6708 err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6709 if (err)
6710 goto free_msg;
6711
6712 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6713 goto nla_put_failure;
6714
6715 genlmsg_end(msg, hdr);
6716
6717 return genlmsg_reply(msg, info);
6718
6719 nla_put_failure:
6720 err = -ENOBUFS;
6721 free_msg:
6722 nlmsg_free(msg);
6723 return err;
6724 }
6725
6726 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6727 {
6728 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6729
6730 if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6731 return -EOPNOTSUPP;
6732
6733 if (rdev->ap_beacons_nlpid)
6734 return -EBUSY;
6735
6736 rdev->ap_beacons_nlpid = info->snd_pid;
6737
6738 return 0;
6739 }
6740
6741 #define NL80211_FLAG_NEED_WIPHY 0x01
6742 #define NL80211_FLAG_NEED_NETDEV 0x02
6743 #define NL80211_FLAG_NEED_RTNL 0x04
6744 #define NL80211_FLAG_CHECK_NETDEV_UP 0x08
6745 #define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\
6746 NL80211_FLAG_CHECK_NETDEV_UP)
6747 #define NL80211_FLAG_NEED_WDEV 0x10
6748 /* If a netdev is associated, it must be UP */
6749 #define NL80211_FLAG_NEED_WDEV_UP (NL80211_FLAG_NEED_WDEV |\
6750 NL80211_FLAG_CHECK_NETDEV_UP)
6751
6752 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6753 struct genl_info *info)
6754 {
6755 struct cfg80211_registered_device *rdev;
6756 struct wireless_dev *wdev;
6757 struct net_device *dev;
6758 bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6759
6760 if (rtnl)
6761 rtnl_lock();
6762
6763 if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6764 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6765 if (IS_ERR(rdev)) {
6766 if (rtnl)
6767 rtnl_unlock();
6768 return PTR_ERR(rdev);
6769 }
6770 info->user_ptr[0] = rdev;
6771 } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
6772 ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
6773 mutex_lock(&cfg80211_mutex);
6774 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
6775 info->attrs);
6776 if (IS_ERR(wdev)) {
6777 mutex_unlock(&cfg80211_mutex);
6778 if (rtnl)
6779 rtnl_unlock();
6780 return PTR_ERR(wdev);
6781 }
6782
6783 dev = wdev->netdev;
6784 rdev = wiphy_to_dev(wdev->wiphy);
6785
6786 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6787 if (!dev) {
6788 mutex_unlock(&cfg80211_mutex);
6789 if (rtnl)
6790 rtnl_unlock();
6791 return -EINVAL;
6792 }
6793
6794 info->user_ptr[1] = dev;
6795 } else {
6796 info->user_ptr[1] = wdev;
6797 }
6798
6799 if (dev) {
6800 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6801 !netif_running(dev)) {
6802 mutex_unlock(&cfg80211_mutex);
6803 if (rtnl)
6804 rtnl_unlock();
6805 return -ENETDOWN;
6806 }
6807
6808 dev_hold(dev);
6809 }
6810
6811 cfg80211_lock_rdev(rdev);
6812
6813 mutex_unlock(&cfg80211_mutex);
6814
6815 info->user_ptr[0] = rdev;
6816 }
6817
6818 return 0;
6819 }
6820
6821 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6822 struct genl_info *info)
6823 {
6824 if (info->user_ptr[0])
6825 cfg80211_unlock_rdev(info->user_ptr[0]);
6826 if (info->user_ptr[1]) {
6827 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
6828 struct wireless_dev *wdev = info->user_ptr[1];
6829
6830 if (wdev->netdev)
6831 dev_put(wdev->netdev);
6832 } else {
6833 dev_put(info->user_ptr[1]);
6834 }
6835 }
6836 if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6837 rtnl_unlock();
6838 }
6839
6840 static struct genl_ops nl80211_ops[] = {
6841 {
6842 .cmd = NL80211_CMD_GET_WIPHY,
6843 .doit = nl80211_get_wiphy,
6844 .dumpit = nl80211_dump_wiphy,
6845 .policy = nl80211_policy,
6846 /* can be retrieved by unprivileged users */
6847 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6848 },
6849 {
6850 .cmd = NL80211_CMD_SET_WIPHY,
6851 .doit = nl80211_set_wiphy,
6852 .policy = nl80211_policy,
6853 .flags = GENL_ADMIN_PERM,
6854 .internal_flags = NL80211_FLAG_NEED_RTNL,
6855 },
6856 {
6857 .cmd = NL80211_CMD_GET_INTERFACE,
6858 .doit = nl80211_get_interface,
6859 .dumpit = nl80211_dump_interface,
6860 .policy = nl80211_policy,
6861 /* can be retrieved by unprivileged users */
6862 .internal_flags = NL80211_FLAG_NEED_WDEV,
6863 },
6864 {
6865 .cmd = NL80211_CMD_SET_INTERFACE,
6866 .doit = nl80211_set_interface,
6867 .policy = nl80211_policy,
6868 .flags = GENL_ADMIN_PERM,
6869 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6870 NL80211_FLAG_NEED_RTNL,
6871 },
6872 {
6873 .cmd = NL80211_CMD_NEW_INTERFACE,
6874 .doit = nl80211_new_interface,
6875 .policy = nl80211_policy,
6876 .flags = GENL_ADMIN_PERM,
6877 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6878 NL80211_FLAG_NEED_RTNL,
6879 },
6880 {
6881 .cmd = NL80211_CMD_DEL_INTERFACE,
6882 .doit = nl80211_del_interface,
6883 .policy = nl80211_policy,
6884 .flags = GENL_ADMIN_PERM,
6885 .internal_flags = NL80211_FLAG_NEED_WDEV |
6886 NL80211_FLAG_NEED_RTNL,
6887 },
6888 {
6889 .cmd = NL80211_CMD_GET_KEY,
6890 .doit = nl80211_get_key,
6891 .policy = nl80211_policy,
6892 .flags = GENL_ADMIN_PERM,
6893 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6894 NL80211_FLAG_NEED_RTNL,
6895 },
6896 {
6897 .cmd = NL80211_CMD_SET_KEY,
6898 .doit = nl80211_set_key,
6899 .policy = nl80211_policy,
6900 .flags = GENL_ADMIN_PERM,
6901 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6902 NL80211_FLAG_NEED_RTNL,
6903 },
6904 {
6905 .cmd = NL80211_CMD_NEW_KEY,
6906 .doit = nl80211_new_key,
6907 .policy = nl80211_policy,
6908 .flags = GENL_ADMIN_PERM,
6909 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6910 NL80211_FLAG_NEED_RTNL,
6911 },
6912 {
6913 .cmd = NL80211_CMD_DEL_KEY,
6914 .doit = nl80211_del_key,
6915 .policy = nl80211_policy,
6916 .flags = GENL_ADMIN_PERM,
6917 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6918 NL80211_FLAG_NEED_RTNL,
6919 },
6920 {
6921 .cmd = NL80211_CMD_SET_BEACON,
6922 .policy = nl80211_policy,
6923 .flags = GENL_ADMIN_PERM,
6924 .doit = nl80211_set_beacon,
6925 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6926 NL80211_FLAG_NEED_RTNL,
6927 },
6928 {
6929 .cmd = NL80211_CMD_START_AP,
6930 .policy = nl80211_policy,
6931 .flags = GENL_ADMIN_PERM,
6932 .doit = nl80211_start_ap,
6933 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6934 NL80211_FLAG_NEED_RTNL,
6935 },
6936 {
6937 .cmd = NL80211_CMD_STOP_AP,
6938 .policy = nl80211_policy,
6939 .flags = GENL_ADMIN_PERM,
6940 .doit = nl80211_stop_ap,
6941 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6942 NL80211_FLAG_NEED_RTNL,
6943 },
6944 {
6945 .cmd = NL80211_CMD_GET_STATION,
6946 .doit = nl80211_get_station,
6947 .dumpit = nl80211_dump_station,
6948 .policy = nl80211_policy,
6949 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6950 NL80211_FLAG_NEED_RTNL,
6951 },
6952 {
6953 .cmd = NL80211_CMD_SET_STATION,
6954 .doit = nl80211_set_station,
6955 .policy = nl80211_policy,
6956 .flags = GENL_ADMIN_PERM,
6957 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6958 NL80211_FLAG_NEED_RTNL,
6959 },
6960 {
6961 .cmd = NL80211_CMD_NEW_STATION,
6962 .doit = nl80211_new_station,
6963 .policy = nl80211_policy,
6964 .flags = GENL_ADMIN_PERM,
6965 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6966 NL80211_FLAG_NEED_RTNL,
6967 },
6968 {
6969 .cmd = NL80211_CMD_DEL_STATION,
6970 .doit = nl80211_del_station,
6971 .policy = nl80211_policy,
6972 .flags = GENL_ADMIN_PERM,
6973 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6974 NL80211_FLAG_NEED_RTNL,
6975 },
6976 {
6977 .cmd = NL80211_CMD_GET_MPATH,
6978 .doit = nl80211_get_mpath,
6979 .dumpit = nl80211_dump_mpath,
6980 .policy = nl80211_policy,
6981 .flags = GENL_ADMIN_PERM,
6982 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6983 NL80211_FLAG_NEED_RTNL,
6984 },
6985 {
6986 .cmd = NL80211_CMD_SET_MPATH,
6987 .doit = nl80211_set_mpath,
6988 .policy = nl80211_policy,
6989 .flags = GENL_ADMIN_PERM,
6990 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6991 NL80211_FLAG_NEED_RTNL,
6992 },
6993 {
6994 .cmd = NL80211_CMD_NEW_MPATH,
6995 .doit = nl80211_new_mpath,
6996 .policy = nl80211_policy,
6997 .flags = GENL_ADMIN_PERM,
6998 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6999 NL80211_FLAG_NEED_RTNL,
7000 },
7001 {
7002 .cmd = NL80211_CMD_DEL_MPATH,
7003 .doit = nl80211_del_mpath,
7004 .policy = nl80211_policy,
7005 .flags = GENL_ADMIN_PERM,
7006 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7007 NL80211_FLAG_NEED_RTNL,
7008 },
7009 {
7010 .cmd = NL80211_CMD_SET_BSS,
7011 .doit = nl80211_set_bss,
7012 .policy = nl80211_policy,
7013 .flags = GENL_ADMIN_PERM,
7014 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7015 NL80211_FLAG_NEED_RTNL,
7016 },
7017 {
7018 .cmd = NL80211_CMD_GET_REG,
7019 .doit = nl80211_get_reg,
7020 .policy = nl80211_policy,
7021 /* can be retrieved by unprivileged users */
7022 },
7023 {
7024 .cmd = NL80211_CMD_SET_REG,
7025 .doit = nl80211_set_reg,
7026 .policy = nl80211_policy,
7027 .flags = GENL_ADMIN_PERM,
7028 },
7029 {
7030 .cmd = NL80211_CMD_REQ_SET_REG,
7031 .doit = nl80211_req_set_reg,
7032 .policy = nl80211_policy,
7033 .flags = GENL_ADMIN_PERM,
7034 },
7035 {
7036 .cmd = NL80211_CMD_GET_MESH_CONFIG,
7037 .doit = nl80211_get_mesh_config,
7038 .policy = nl80211_policy,
7039 /* can be retrieved by unprivileged users */
7040 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7041 NL80211_FLAG_NEED_RTNL,
7042 },
7043 {
7044 .cmd = NL80211_CMD_SET_MESH_CONFIG,
7045 .doit = nl80211_update_mesh_config,
7046 .policy = nl80211_policy,
7047 .flags = GENL_ADMIN_PERM,
7048 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7049 NL80211_FLAG_NEED_RTNL,
7050 },
7051 {
7052 .cmd = NL80211_CMD_TRIGGER_SCAN,
7053 .doit = nl80211_trigger_scan,
7054 .policy = nl80211_policy,
7055 .flags = GENL_ADMIN_PERM,
7056 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7057 NL80211_FLAG_NEED_RTNL,
7058 },
7059 {
7060 .cmd = NL80211_CMD_GET_SCAN,
7061 .policy = nl80211_policy,
7062 .dumpit = nl80211_dump_scan,
7063 },
7064 {
7065 .cmd = NL80211_CMD_START_SCHED_SCAN,
7066 .doit = nl80211_start_sched_scan,
7067 .policy = nl80211_policy,
7068 .flags = GENL_ADMIN_PERM,
7069 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7070 NL80211_FLAG_NEED_RTNL,
7071 },
7072 {
7073 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
7074 .doit = nl80211_stop_sched_scan,
7075 .policy = nl80211_policy,
7076 .flags = GENL_ADMIN_PERM,
7077 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7078 NL80211_FLAG_NEED_RTNL,
7079 },
7080 {
7081 .cmd = NL80211_CMD_AUTHENTICATE,
7082 .doit = nl80211_authenticate,
7083 .policy = nl80211_policy,
7084 .flags = GENL_ADMIN_PERM,
7085 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7086 NL80211_FLAG_NEED_RTNL,
7087 },
7088 {
7089 .cmd = NL80211_CMD_ASSOCIATE,
7090 .doit = nl80211_associate,
7091 .policy = nl80211_policy,
7092 .flags = GENL_ADMIN_PERM,
7093 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7094 NL80211_FLAG_NEED_RTNL,
7095 },
7096 {
7097 .cmd = NL80211_CMD_DEAUTHENTICATE,
7098 .doit = nl80211_deauthenticate,
7099 .policy = nl80211_policy,
7100 .flags = GENL_ADMIN_PERM,
7101 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7102 NL80211_FLAG_NEED_RTNL,
7103 },
7104 {
7105 .cmd = NL80211_CMD_DISASSOCIATE,
7106 .doit = nl80211_disassociate,
7107 .policy = nl80211_policy,
7108 .flags = GENL_ADMIN_PERM,
7109 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7110 NL80211_FLAG_NEED_RTNL,
7111 },
7112 {
7113 .cmd = NL80211_CMD_JOIN_IBSS,
7114 .doit = nl80211_join_ibss,
7115 .policy = nl80211_policy,
7116 .flags = GENL_ADMIN_PERM,
7117 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7118 NL80211_FLAG_NEED_RTNL,
7119 },
7120 {
7121 .cmd = NL80211_CMD_LEAVE_IBSS,
7122 .doit = nl80211_leave_ibss,
7123 .policy = nl80211_policy,
7124 .flags = GENL_ADMIN_PERM,
7125 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7126 NL80211_FLAG_NEED_RTNL,
7127 },
7128 #ifdef CONFIG_NL80211_TESTMODE
7129 {
7130 .cmd = NL80211_CMD_TESTMODE,
7131 .doit = nl80211_testmode_do,
7132 .dumpit = nl80211_testmode_dump,
7133 .policy = nl80211_policy,
7134 .flags = GENL_ADMIN_PERM,
7135 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7136 NL80211_FLAG_NEED_RTNL,
7137 },
7138 #endif
7139 {
7140 .cmd = NL80211_CMD_CONNECT,
7141 .doit = nl80211_connect,
7142 .policy = nl80211_policy,
7143 .flags = GENL_ADMIN_PERM,
7144 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7145 NL80211_FLAG_NEED_RTNL,
7146 },
7147 {
7148 .cmd = NL80211_CMD_DISCONNECT,
7149 .doit = nl80211_disconnect,
7150 .policy = nl80211_policy,
7151 .flags = GENL_ADMIN_PERM,
7152 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7153 NL80211_FLAG_NEED_RTNL,
7154 },
7155 {
7156 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7157 .doit = nl80211_wiphy_netns,
7158 .policy = nl80211_policy,
7159 .flags = GENL_ADMIN_PERM,
7160 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7161 NL80211_FLAG_NEED_RTNL,
7162 },
7163 {
7164 .cmd = NL80211_CMD_GET_SURVEY,
7165 .policy = nl80211_policy,
7166 .dumpit = nl80211_dump_survey,
7167 },
7168 {
7169 .cmd = NL80211_CMD_SET_PMKSA,
7170 .doit = nl80211_setdel_pmksa,
7171 .policy = nl80211_policy,
7172 .flags = GENL_ADMIN_PERM,
7173 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7174 NL80211_FLAG_NEED_RTNL,
7175 },
7176 {
7177 .cmd = NL80211_CMD_DEL_PMKSA,
7178 .doit = nl80211_setdel_pmksa,
7179 .policy = nl80211_policy,
7180 .flags = GENL_ADMIN_PERM,
7181 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7182 NL80211_FLAG_NEED_RTNL,
7183 },
7184 {
7185 .cmd = NL80211_CMD_FLUSH_PMKSA,
7186 .doit = nl80211_flush_pmksa,
7187 .policy = nl80211_policy,
7188 .flags = GENL_ADMIN_PERM,
7189 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7190 NL80211_FLAG_NEED_RTNL,
7191 },
7192 {
7193 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7194 .doit = nl80211_remain_on_channel,
7195 .policy = nl80211_policy,
7196 .flags = GENL_ADMIN_PERM,
7197 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7198 NL80211_FLAG_NEED_RTNL,
7199 },
7200 {
7201 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7202 .doit = nl80211_cancel_remain_on_channel,
7203 .policy = nl80211_policy,
7204 .flags = GENL_ADMIN_PERM,
7205 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7206 NL80211_FLAG_NEED_RTNL,
7207 },
7208 {
7209 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7210 .doit = nl80211_set_tx_bitrate_mask,
7211 .policy = nl80211_policy,
7212 .flags = GENL_ADMIN_PERM,
7213 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7214 NL80211_FLAG_NEED_RTNL,
7215 },
7216 {
7217 .cmd = NL80211_CMD_REGISTER_FRAME,
7218 .doit = nl80211_register_mgmt,
7219 .policy = nl80211_policy,
7220 .flags = GENL_ADMIN_PERM,
7221 .internal_flags = NL80211_FLAG_NEED_WDEV |
7222 NL80211_FLAG_NEED_RTNL,
7223 },
7224 {
7225 .cmd = NL80211_CMD_FRAME,
7226 .doit = nl80211_tx_mgmt,
7227 .policy = nl80211_policy,
7228 .flags = GENL_ADMIN_PERM,
7229 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7230 NL80211_FLAG_NEED_RTNL,
7231 },
7232 {
7233 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7234 .doit = nl80211_tx_mgmt_cancel_wait,
7235 .policy = nl80211_policy,
7236 .flags = GENL_ADMIN_PERM,
7237 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7238 NL80211_FLAG_NEED_RTNL,
7239 },
7240 {
7241 .cmd = NL80211_CMD_SET_POWER_SAVE,
7242 .doit = nl80211_set_power_save,
7243 .policy = nl80211_policy,
7244 .flags = GENL_ADMIN_PERM,
7245 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7246 NL80211_FLAG_NEED_RTNL,
7247 },
7248 {
7249 .cmd = NL80211_CMD_GET_POWER_SAVE,
7250 .doit = nl80211_get_power_save,
7251 .policy = nl80211_policy,
7252 /* can be retrieved by unprivileged users */
7253 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7254 NL80211_FLAG_NEED_RTNL,
7255 },
7256 {
7257 .cmd = NL80211_CMD_SET_CQM,
7258 .doit = nl80211_set_cqm,
7259 .policy = nl80211_policy,
7260 .flags = GENL_ADMIN_PERM,
7261 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7262 NL80211_FLAG_NEED_RTNL,
7263 },
7264 {
7265 .cmd = NL80211_CMD_SET_CHANNEL,
7266 .doit = nl80211_set_channel,
7267 .policy = nl80211_policy,
7268 .flags = GENL_ADMIN_PERM,
7269 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7270 NL80211_FLAG_NEED_RTNL,
7271 },
7272 {
7273 .cmd = NL80211_CMD_SET_WDS_PEER,
7274 .doit = nl80211_set_wds_peer,
7275 .policy = nl80211_policy,
7276 .flags = GENL_ADMIN_PERM,
7277 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7278 NL80211_FLAG_NEED_RTNL,
7279 },
7280 {
7281 .cmd = NL80211_CMD_JOIN_MESH,
7282 .doit = nl80211_join_mesh,
7283 .policy = nl80211_policy,
7284 .flags = GENL_ADMIN_PERM,
7285 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7286 NL80211_FLAG_NEED_RTNL,
7287 },
7288 {
7289 .cmd = NL80211_CMD_LEAVE_MESH,
7290 .doit = nl80211_leave_mesh,
7291 .policy = nl80211_policy,
7292 .flags = GENL_ADMIN_PERM,
7293 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7294 NL80211_FLAG_NEED_RTNL,
7295 },
7296 #ifdef CONFIG_PM
7297 {
7298 .cmd = NL80211_CMD_GET_WOWLAN,
7299 .doit = nl80211_get_wowlan,
7300 .policy = nl80211_policy,
7301 /* can be retrieved by unprivileged users */
7302 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7303 NL80211_FLAG_NEED_RTNL,
7304 },
7305 {
7306 .cmd = NL80211_CMD_SET_WOWLAN,
7307 .doit = nl80211_set_wowlan,
7308 .policy = nl80211_policy,
7309 .flags = GENL_ADMIN_PERM,
7310 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7311 NL80211_FLAG_NEED_RTNL,
7312 },
7313 #endif
7314 {
7315 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7316 .doit = nl80211_set_rekey_data,
7317 .policy = nl80211_policy,
7318 .flags = GENL_ADMIN_PERM,
7319 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7320 NL80211_FLAG_NEED_RTNL,
7321 },
7322 {
7323 .cmd = NL80211_CMD_TDLS_MGMT,
7324 .doit = nl80211_tdls_mgmt,
7325 .policy = nl80211_policy,
7326 .flags = GENL_ADMIN_PERM,
7327 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7328 NL80211_FLAG_NEED_RTNL,
7329 },
7330 {
7331 .cmd = NL80211_CMD_TDLS_OPER,
7332 .doit = nl80211_tdls_oper,
7333 .policy = nl80211_policy,
7334 .flags = GENL_ADMIN_PERM,
7335 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7336 NL80211_FLAG_NEED_RTNL,
7337 },
7338 {
7339 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7340 .doit = nl80211_register_unexpected_frame,
7341 .policy = nl80211_policy,
7342 .flags = GENL_ADMIN_PERM,
7343 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7344 NL80211_FLAG_NEED_RTNL,
7345 },
7346 {
7347 .cmd = NL80211_CMD_PROBE_CLIENT,
7348 .doit = nl80211_probe_client,
7349 .policy = nl80211_policy,
7350 .flags = GENL_ADMIN_PERM,
7351 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7352 NL80211_FLAG_NEED_RTNL,
7353 },
7354 {
7355 .cmd = NL80211_CMD_REGISTER_BEACONS,
7356 .doit = nl80211_register_beacons,
7357 .policy = nl80211_policy,
7358 .flags = GENL_ADMIN_PERM,
7359 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7360 NL80211_FLAG_NEED_RTNL,
7361 },
7362 {
7363 .cmd = NL80211_CMD_SET_NOACK_MAP,
7364 .doit = nl80211_set_noack_map,
7365 .policy = nl80211_policy,
7366 .flags = GENL_ADMIN_PERM,
7367 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7368 NL80211_FLAG_NEED_RTNL,
7369 },
7370
7371 };
7372
7373 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7374 .name = "mlme",
7375 };
7376
7377 /* multicast groups */
7378 static struct genl_multicast_group nl80211_config_mcgrp = {
7379 .name = "config",
7380 };
7381 static struct genl_multicast_group nl80211_scan_mcgrp = {
7382 .name = "scan",
7383 };
7384 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7385 .name = "regulatory",
7386 };
7387
7388 /* notification functions */
7389
7390 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7391 {
7392 struct sk_buff *msg;
7393
7394 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7395 if (!msg)
7396 return;
7397
7398 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7399 nlmsg_free(msg);
7400 return;
7401 }
7402
7403 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7404 nl80211_config_mcgrp.id, GFP_KERNEL);
7405 }
7406
7407 static int nl80211_add_scan_req(struct sk_buff *msg,
7408 struct cfg80211_registered_device *rdev)
7409 {
7410 struct cfg80211_scan_request *req = rdev->scan_req;
7411 struct nlattr *nest;
7412 int i;
7413
7414 ASSERT_RDEV_LOCK(rdev);
7415
7416 if (WARN_ON(!req))
7417 return 0;
7418
7419 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7420 if (!nest)
7421 goto nla_put_failure;
7422 for (i = 0; i < req->n_ssids; i++) {
7423 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7424 goto nla_put_failure;
7425 }
7426 nla_nest_end(msg, nest);
7427
7428 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7429 if (!nest)
7430 goto nla_put_failure;
7431 for (i = 0; i < req->n_channels; i++) {
7432 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7433 goto nla_put_failure;
7434 }
7435 nla_nest_end(msg, nest);
7436
7437 if (req->ie &&
7438 nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7439 goto nla_put_failure;
7440
7441 return 0;
7442 nla_put_failure:
7443 return -ENOBUFS;
7444 }
7445
7446 static int nl80211_send_scan_msg(struct sk_buff *msg,
7447 struct cfg80211_registered_device *rdev,
7448 struct net_device *netdev,
7449 u32 pid, u32 seq, int flags,
7450 u32 cmd)
7451 {
7452 void *hdr;
7453
7454 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7455 if (!hdr)
7456 return -1;
7457
7458 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7459 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7460 goto nla_put_failure;
7461
7462 /* ignore errors and send incomplete event anyway */
7463 nl80211_add_scan_req(msg, rdev);
7464
7465 return genlmsg_end(msg, hdr);
7466
7467 nla_put_failure:
7468 genlmsg_cancel(msg, hdr);
7469 return -EMSGSIZE;
7470 }
7471
7472 static int
7473 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7474 struct cfg80211_registered_device *rdev,
7475 struct net_device *netdev,
7476 u32 pid, u32 seq, int flags, u32 cmd)
7477 {
7478 void *hdr;
7479
7480 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7481 if (!hdr)
7482 return -1;
7483
7484 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7485 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7486 goto nla_put_failure;
7487
7488 return genlmsg_end(msg, hdr);
7489
7490 nla_put_failure:
7491 genlmsg_cancel(msg, hdr);
7492 return -EMSGSIZE;
7493 }
7494
7495 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7496 struct net_device *netdev)
7497 {
7498 struct sk_buff *msg;
7499
7500 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7501 if (!msg)
7502 return;
7503
7504 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7505 NL80211_CMD_TRIGGER_SCAN) < 0) {
7506 nlmsg_free(msg);
7507 return;
7508 }
7509
7510 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7511 nl80211_scan_mcgrp.id, GFP_KERNEL);
7512 }
7513
7514 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7515 struct net_device *netdev)
7516 {
7517 struct sk_buff *msg;
7518
7519 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7520 if (!msg)
7521 return;
7522
7523 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7524 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7525 nlmsg_free(msg);
7526 return;
7527 }
7528
7529 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7530 nl80211_scan_mcgrp.id, GFP_KERNEL);
7531 }
7532
7533 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7534 struct net_device *netdev)
7535 {
7536 struct sk_buff *msg;
7537
7538 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7539 if (!msg)
7540 return;
7541
7542 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7543 NL80211_CMD_SCAN_ABORTED) < 0) {
7544 nlmsg_free(msg);
7545 return;
7546 }
7547
7548 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7549 nl80211_scan_mcgrp.id, GFP_KERNEL);
7550 }
7551
7552 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7553 struct net_device *netdev)
7554 {
7555 struct sk_buff *msg;
7556
7557 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7558 if (!msg)
7559 return;
7560
7561 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7562 NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7563 nlmsg_free(msg);
7564 return;
7565 }
7566
7567 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7568 nl80211_scan_mcgrp.id, GFP_KERNEL);
7569 }
7570
7571 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7572 struct net_device *netdev, u32 cmd)
7573 {
7574 struct sk_buff *msg;
7575
7576 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7577 if (!msg)
7578 return;
7579
7580 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7581 nlmsg_free(msg);
7582 return;
7583 }
7584
7585 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7586 nl80211_scan_mcgrp.id, GFP_KERNEL);
7587 }
7588
7589 /*
7590 * This can happen on global regulatory changes or device specific settings
7591 * based on custom world regulatory domains.
7592 */
7593 void nl80211_send_reg_change_event(struct regulatory_request *request)
7594 {
7595 struct sk_buff *msg;
7596 void *hdr;
7597
7598 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7599 if (!msg)
7600 return;
7601
7602 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7603 if (!hdr) {
7604 nlmsg_free(msg);
7605 return;
7606 }
7607
7608 /* Userspace can always count this one always being set */
7609 if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7610 goto nla_put_failure;
7611
7612 if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7613 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7614 NL80211_REGDOM_TYPE_WORLD))
7615 goto nla_put_failure;
7616 } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7617 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7618 NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7619 goto nla_put_failure;
7620 } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7621 request->intersect) {
7622 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7623 NL80211_REGDOM_TYPE_INTERSECTION))
7624 goto nla_put_failure;
7625 } else {
7626 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7627 NL80211_REGDOM_TYPE_COUNTRY) ||
7628 nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7629 request->alpha2))
7630 goto nla_put_failure;
7631 }
7632
7633 if (wiphy_idx_valid(request->wiphy_idx) &&
7634 nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7635 goto nla_put_failure;
7636
7637 genlmsg_end(msg, hdr);
7638
7639 rcu_read_lock();
7640 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7641 GFP_ATOMIC);
7642 rcu_read_unlock();
7643
7644 return;
7645
7646 nla_put_failure:
7647 genlmsg_cancel(msg, hdr);
7648 nlmsg_free(msg);
7649 }
7650
7651 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7652 struct net_device *netdev,
7653 const u8 *buf, size_t len,
7654 enum nl80211_commands cmd, gfp_t gfp)
7655 {
7656 struct sk_buff *msg;
7657 void *hdr;
7658
7659 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7660 if (!msg)
7661 return;
7662
7663 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7664 if (!hdr) {
7665 nlmsg_free(msg);
7666 return;
7667 }
7668
7669 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7670 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7671 nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7672 goto nla_put_failure;
7673
7674 genlmsg_end(msg, hdr);
7675
7676 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7677 nl80211_mlme_mcgrp.id, gfp);
7678 return;
7679
7680 nla_put_failure:
7681 genlmsg_cancel(msg, hdr);
7682 nlmsg_free(msg);
7683 }
7684
7685 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7686 struct net_device *netdev, const u8 *buf,
7687 size_t len, gfp_t gfp)
7688 {
7689 nl80211_send_mlme_event(rdev, netdev, buf, len,
7690 NL80211_CMD_AUTHENTICATE, gfp);
7691 }
7692
7693 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7694 struct net_device *netdev, const u8 *buf,
7695 size_t len, gfp_t gfp)
7696 {
7697 nl80211_send_mlme_event(rdev, netdev, buf, len,
7698 NL80211_CMD_ASSOCIATE, gfp);
7699 }
7700
7701 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7702 struct net_device *netdev, const u8 *buf,
7703 size_t len, gfp_t gfp)
7704 {
7705 nl80211_send_mlme_event(rdev, netdev, buf, len,
7706 NL80211_CMD_DEAUTHENTICATE, gfp);
7707 }
7708
7709 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7710 struct net_device *netdev, const u8 *buf,
7711 size_t len, gfp_t gfp)
7712 {
7713 nl80211_send_mlme_event(rdev, netdev, buf, len,
7714 NL80211_CMD_DISASSOCIATE, gfp);
7715 }
7716
7717 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7718 struct net_device *netdev, const u8 *buf,
7719 size_t len, gfp_t gfp)
7720 {
7721 nl80211_send_mlme_event(rdev, netdev, buf, len,
7722 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7723 }
7724
7725 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7726 struct net_device *netdev, const u8 *buf,
7727 size_t len, gfp_t gfp)
7728 {
7729 nl80211_send_mlme_event(rdev, netdev, buf, len,
7730 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7731 }
7732
7733 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7734 struct net_device *netdev, int cmd,
7735 const u8 *addr, gfp_t gfp)
7736 {
7737 struct sk_buff *msg;
7738 void *hdr;
7739
7740 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7741 if (!msg)
7742 return;
7743
7744 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7745 if (!hdr) {
7746 nlmsg_free(msg);
7747 return;
7748 }
7749
7750 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7751 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7752 nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7753 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7754 goto nla_put_failure;
7755
7756 genlmsg_end(msg, hdr);
7757
7758 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7759 nl80211_mlme_mcgrp.id, gfp);
7760 return;
7761
7762 nla_put_failure:
7763 genlmsg_cancel(msg, hdr);
7764 nlmsg_free(msg);
7765 }
7766
7767 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7768 struct net_device *netdev, const u8 *addr,
7769 gfp_t gfp)
7770 {
7771 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7772 addr, gfp);
7773 }
7774
7775 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7776 struct net_device *netdev, const u8 *addr,
7777 gfp_t gfp)
7778 {
7779 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7780 addr, gfp);
7781 }
7782
7783 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7784 struct net_device *netdev, const u8 *bssid,
7785 const u8 *req_ie, size_t req_ie_len,
7786 const u8 *resp_ie, size_t resp_ie_len,
7787 u16 status, gfp_t gfp)
7788 {
7789 struct sk_buff *msg;
7790 void *hdr;
7791
7792 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7793 if (!msg)
7794 return;
7795
7796 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7797 if (!hdr) {
7798 nlmsg_free(msg);
7799 return;
7800 }
7801
7802 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7803 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7804 (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7805 nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7806 (req_ie &&
7807 nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7808 (resp_ie &&
7809 nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7810 goto nla_put_failure;
7811
7812 genlmsg_end(msg, hdr);
7813
7814 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7815 nl80211_mlme_mcgrp.id, gfp);
7816 return;
7817
7818 nla_put_failure:
7819 genlmsg_cancel(msg, hdr);
7820 nlmsg_free(msg);
7821
7822 }
7823
7824 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7825 struct net_device *netdev, const u8 *bssid,
7826 const u8 *req_ie, size_t req_ie_len,
7827 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7828 {
7829 struct sk_buff *msg;
7830 void *hdr;
7831
7832 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7833 if (!msg)
7834 return;
7835
7836 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7837 if (!hdr) {
7838 nlmsg_free(msg);
7839 return;
7840 }
7841
7842 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7843 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7844 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7845 (req_ie &&
7846 nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7847 (resp_ie &&
7848 nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7849 goto nla_put_failure;
7850
7851 genlmsg_end(msg, hdr);
7852
7853 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7854 nl80211_mlme_mcgrp.id, gfp);
7855 return;
7856
7857 nla_put_failure:
7858 genlmsg_cancel(msg, hdr);
7859 nlmsg_free(msg);
7860
7861 }
7862
7863 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7864 struct net_device *netdev, u16 reason,
7865 const u8 *ie, size_t ie_len, bool from_ap)
7866 {
7867 struct sk_buff *msg;
7868 void *hdr;
7869
7870 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7871 if (!msg)
7872 return;
7873
7874 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7875 if (!hdr) {
7876 nlmsg_free(msg);
7877 return;
7878 }
7879
7880 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7881 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7882 (from_ap && reason &&
7883 nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7884 (from_ap &&
7885 nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7886 (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7887 goto nla_put_failure;
7888
7889 genlmsg_end(msg, hdr);
7890
7891 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7892 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7893 return;
7894
7895 nla_put_failure:
7896 genlmsg_cancel(msg, hdr);
7897 nlmsg_free(msg);
7898
7899 }
7900
7901 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7902 struct net_device *netdev, const u8 *bssid,
7903 gfp_t gfp)
7904 {
7905 struct sk_buff *msg;
7906 void *hdr;
7907
7908 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7909 if (!msg)
7910 return;
7911
7912 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7913 if (!hdr) {
7914 nlmsg_free(msg);
7915 return;
7916 }
7917
7918 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7919 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7920 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7921 goto nla_put_failure;
7922
7923 genlmsg_end(msg, hdr);
7924
7925 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7926 nl80211_mlme_mcgrp.id, gfp);
7927 return;
7928
7929 nla_put_failure:
7930 genlmsg_cancel(msg, hdr);
7931 nlmsg_free(msg);
7932 }
7933
7934 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7935 struct net_device *netdev,
7936 const u8 *macaddr, const u8* ie, u8 ie_len,
7937 gfp_t gfp)
7938 {
7939 struct sk_buff *msg;
7940 void *hdr;
7941
7942 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7943 if (!msg)
7944 return;
7945
7946 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7947 if (!hdr) {
7948 nlmsg_free(msg);
7949 return;
7950 }
7951
7952 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7953 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7954 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7955 (ie_len && ie &&
7956 nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7957 goto nla_put_failure;
7958
7959 genlmsg_end(msg, hdr);
7960
7961 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7962 nl80211_mlme_mcgrp.id, gfp);
7963 return;
7964
7965 nla_put_failure:
7966 genlmsg_cancel(msg, hdr);
7967 nlmsg_free(msg);
7968 }
7969
7970 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7971 struct net_device *netdev, const u8 *addr,
7972 enum nl80211_key_type key_type, int key_id,
7973 const u8 *tsc, gfp_t gfp)
7974 {
7975 struct sk_buff *msg;
7976 void *hdr;
7977
7978 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7979 if (!msg)
7980 return;
7981
7982 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7983 if (!hdr) {
7984 nlmsg_free(msg);
7985 return;
7986 }
7987
7988 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7989 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7990 (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7991 nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7992 (key_id != -1 &&
7993 nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7994 (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7995 goto nla_put_failure;
7996
7997 genlmsg_end(msg, hdr);
7998
7999 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8000 nl80211_mlme_mcgrp.id, gfp);
8001 return;
8002
8003 nla_put_failure:
8004 genlmsg_cancel(msg, hdr);
8005 nlmsg_free(msg);
8006 }
8007
8008 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
8009 struct ieee80211_channel *channel_before,
8010 struct ieee80211_channel *channel_after)
8011 {
8012 struct sk_buff *msg;
8013 void *hdr;
8014 struct nlattr *nl_freq;
8015
8016 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
8017 if (!msg)
8018 return;
8019
8020 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
8021 if (!hdr) {
8022 nlmsg_free(msg);
8023 return;
8024 }
8025
8026 /*
8027 * Since we are applying the beacon hint to a wiphy we know its
8028 * wiphy_idx is valid
8029 */
8030 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
8031 goto nla_put_failure;
8032
8033 /* Before */
8034 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
8035 if (!nl_freq)
8036 goto nla_put_failure;
8037 if (nl80211_msg_put_channel(msg, channel_before))
8038 goto nla_put_failure;
8039 nla_nest_end(msg, nl_freq);
8040
8041 /* After */
8042 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
8043 if (!nl_freq)
8044 goto nla_put_failure;
8045 if (nl80211_msg_put_channel(msg, channel_after))
8046 goto nla_put_failure;
8047 nla_nest_end(msg, nl_freq);
8048
8049 genlmsg_end(msg, hdr);
8050
8051 rcu_read_lock();
8052 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8053 GFP_ATOMIC);
8054 rcu_read_unlock();
8055
8056 return;
8057
8058 nla_put_failure:
8059 genlmsg_cancel(msg, hdr);
8060 nlmsg_free(msg);
8061 }
8062
8063 static void nl80211_send_remain_on_chan_event(
8064 int cmd, struct cfg80211_registered_device *rdev,
8065 struct wireless_dev *wdev, u64 cookie,
8066 struct ieee80211_channel *chan,
8067 enum nl80211_channel_type channel_type,
8068 unsigned int duration, gfp_t gfp)
8069 {
8070 struct sk_buff *msg;
8071 void *hdr;
8072
8073 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8074 if (!msg)
8075 return;
8076
8077 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8078 if (!hdr) {
8079 nlmsg_free(msg);
8080 return;
8081 }
8082
8083 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8084 (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8085 wdev->netdev->ifindex)) ||
8086 nla_put_u32(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
8087 nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
8088 nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
8089 nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8090 goto nla_put_failure;
8091
8092 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
8093 nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
8094 goto nla_put_failure;
8095
8096 genlmsg_end(msg, hdr);
8097
8098 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8099 nl80211_mlme_mcgrp.id, gfp);
8100 return;
8101
8102 nla_put_failure:
8103 genlmsg_cancel(msg, hdr);
8104 nlmsg_free(msg);
8105 }
8106
8107 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
8108 struct wireless_dev *wdev, u64 cookie,
8109 struct ieee80211_channel *chan,
8110 enum nl80211_channel_type channel_type,
8111 unsigned int duration, gfp_t gfp)
8112 {
8113 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
8114 rdev, wdev, cookie, chan,
8115 channel_type, duration, gfp);
8116 }
8117
8118 void nl80211_send_remain_on_channel_cancel(
8119 struct cfg80211_registered_device *rdev,
8120 struct wireless_dev *wdev,
8121 u64 cookie, struct ieee80211_channel *chan,
8122 enum nl80211_channel_type channel_type, gfp_t gfp)
8123 {
8124 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8125 rdev, wdev, cookie, chan,
8126 channel_type, 0, gfp);
8127 }
8128
8129 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8130 struct net_device *dev, const u8 *mac_addr,
8131 struct station_info *sinfo, gfp_t gfp)
8132 {
8133 struct sk_buff *msg;
8134
8135 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8136 if (!msg)
8137 return;
8138
8139 if (nl80211_send_station(msg, 0, 0, 0,
8140 rdev, dev, mac_addr, sinfo) < 0) {
8141 nlmsg_free(msg);
8142 return;
8143 }
8144
8145 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8146 nl80211_mlme_mcgrp.id, gfp);
8147 }
8148
8149 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8150 struct net_device *dev, const u8 *mac_addr,
8151 gfp_t gfp)
8152 {
8153 struct sk_buff *msg;
8154 void *hdr;
8155
8156 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8157 if (!msg)
8158 return;
8159
8160 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8161 if (!hdr) {
8162 nlmsg_free(msg);
8163 return;
8164 }
8165
8166 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8167 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8168 goto nla_put_failure;
8169
8170 genlmsg_end(msg, hdr);
8171
8172 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8173 nl80211_mlme_mcgrp.id, gfp);
8174 return;
8175
8176 nla_put_failure:
8177 genlmsg_cancel(msg, hdr);
8178 nlmsg_free(msg);
8179 }
8180
8181 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8182 const u8 *addr, gfp_t gfp)
8183 {
8184 struct wireless_dev *wdev = dev->ieee80211_ptr;
8185 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8186 struct sk_buff *msg;
8187 void *hdr;
8188 int err;
8189 u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8190
8191 if (!nlpid)
8192 return false;
8193
8194 msg = nlmsg_new(100, gfp);
8195 if (!msg)
8196 return true;
8197
8198 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8199 if (!hdr) {
8200 nlmsg_free(msg);
8201 return true;
8202 }
8203
8204 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8205 nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8206 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8207 goto nla_put_failure;
8208
8209 err = genlmsg_end(msg, hdr);
8210 if (err < 0) {
8211 nlmsg_free(msg);
8212 return true;
8213 }
8214
8215 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8216 return true;
8217
8218 nla_put_failure:
8219 genlmsg_cancel(msg, hdr);
8220 nlmsg_free(msg);
8221 return true;
8222 }
8223
8224 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8225 {
8226 return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8227 addr, gfp);
8228 }
8229
8230 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8231 const u8 *addr, gfp_t gfp)
8232 {
8233 return __nl80211_unexpected_frame(dev,
8234 NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8235 addr, gfp);
8236 }
8237
8238 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8239 struct wireless_dev *wdev, u32 nlpid,
8240 int freq, int sig_dbm,
8241 const u8 *buf, size_t len, gfp_t gfp)
8242 {
8243 struct net_device *netdev = wdev->netdev;
8244 struct sk_buff *msg;
8245 void *hdr;
8246
8247 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8248 if (!msg)
8249 return -ENOMEM;
8250
8251 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8252 if (!hdr) {
8253 nlmsg_free(msg);
8254 return -ENOMEM;
8255 }
8256
8257 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8258 (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8259 netdev->ifindex)) ||
8260 nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8261 (sig_dbm &&
8262 nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8263 nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8264 goto nla_put_failure;
8265
8266 genlmsg_end(msg, hdr);
8267
8268 return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8269
8270 nla_put_failure:
8271 genlmsg_cancel(msg, hdr);
8272 nlmsg_free(msg);
8273 return -ENOBUFS;
8274 }
8275
8276 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8277 struct wireless_dev *wdev, u64 cookie,
8278 const u8 *buf, size_t len, bool ack,
8279 gfp_t gfp)
8280 {
8281 struct net_device *netdev = wdev->netdev;
8282 struct sk_buff *msg;
8283 void *hdr;
8284
8285 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8286 if (!msg)
8287 return;
8288
8289 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8290 if (!hdr) {
8291 nlmsg_free(msg);
8292 return;
8293 }
8294
8295 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8296 (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8297 netdev->ifindex)) ||
8298 nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8299 nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8300 (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8301 goto nla_put_failure;
8302
8303 genlmsg_end(msg, hdr);
8304
8305 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8306 return;
8307
8308 nla_put_failure:
8309 genlmsg_cancel(msg, hdr);
8310 nlmsg_free(msg);
8311 }
8312
8313 void
8314 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8315 struct net_device *netdev,
8316 enum nl80211_cqm_rssi_threshold_event rssi_event,
8317 gfp_t gfp)
8318 {
8319 struct sk_buff *msg;
8320 struct nlattr *pinfoattr;
8321 void *hdr;
8322
8323 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8324 if (!msg)
8325 return;
8326
8327 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8328 if (!hdr) {
8329 nlmsg_free(msg);
8330 return;
8331 }
8332
8333 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8334 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8335 goto nla_put_failure;
8336
8337 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8338 if (!pinfoattr)
8339 goto nla_put_failure;
8340
8341 if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8342 rssi_event))
8343 goto nla_put_failure;
8344
8345 nla_nest_end(msg, pinfoattr);
8346
8347 genlmsg_end(msg, hdr);
8348
8349 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8350 nl80211_mlme_mcgrp.id, gfp);
8351 return;
8352
8353 nla_put_failure:
8354 genlmsg_cancel(msg, hdr);
8355 nlmsg_free(msg);
8356 }
8357
8358 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8359 struct net_device *netdev, const u8 *bssid,
8360 const u8 *replay_ctr, gfp_t gfp)
8361 {
8362 struct sk_buff *msg;
8363 struct nlattr *rekey_attr;
8364 void *hdr;
8365
8366 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8367 if (!msg)
8368 return;
8369
8370 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8371 if (!hdr) {
8372 nlmsg_free(msg);
8373 return;
8374 }
8375
8376 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8377 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8378 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8379 goto nla_put_failure;
8380
8381 rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8382 if (!rekey_attr)
8383 goto nla_put_failure;
8384
8385 if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8386 NL80211_REPLAY_CTR_LEN, replay_ctr))
8387 goto nla_put_failure;
8388
8389 nla_nest_end(msg, rekey_attr);
8390
8391 genlmsg_end(msg, hdr);
8392
8393 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8394 nl80211_mlme_mcgrp.id, gfp);
8395 return;
8396
8397 nla_put_failure:
8398 genlmsg_cancel(msg, hdr);
8399 nlmsg_free(msg);
8400 }
8401
8402 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8403 struct net_device *netdev, int index,
8404 const u8 *bssid, bool preauth, gfp_t gfp)
8405 {
8406 struct sk_buff *msg;
8407 struct nlattr *attr;
8408 void *hdr;
8409
8410 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8411 if (!msg)
8412 return;
8413
8414 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8415 if (!hdr) {
8416 nlmsg_free(msg);
8417 return;
8418 }
8419
8420 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8421 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8422 goto nla_put_failure;
8423
8424 attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8425 if (!attr)
8426 goto nla_put_failure;
8427
8428 if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8429 nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8430 (preauth &&
8431 nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8432 goto nla_put_failure;
8433
8434 nla_nest_end(msg, attr);
8435
8436 genlmsg_end(msg, hdr);
8437
8438 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8439 nl80211_mlme_mcgrp.id, gfp);
8440 return;
8441
8442 nla_put_failure:
8443 genlmsg_cancel(msg, hdr);
8444 nlmsg_free(msg);
8445 }
8446
8447 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8448 struct net_device *netdev, int freq,
8449 enum nl80211_channel_type type, gfp_t gfp)
8450 {
8451 struct sk_buff *msg;
8452 void *hdr;
8453
8454 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8455 if (!msg)
8456 return;
8457
8458 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8459 if (!hdr) {
8460 nlmsg_free(msg);
8461 return;
8462 }
8463
8464 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8465 nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8466 nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8467 goto nla_put_failure;
8468
8469 genlmsg_end(msg, hdr);
8470
8471 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8472 nl80211_mlme_mcgrp.id, gfp);
8473 return;
8474
8475 nla_put_failure:
8476 genlmsg_cancel(msg, hdr);
8477 nlmsg_free(msg);
8478 }
8479
8480 void
8481 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8482 struct net_device *netdev, const u8 *peer,
8483 u32 num_packets, gfp_t gfp)
8484 {
8485 struct sk_buff *msg;
8486 struct nlattr *pinfoattr;
8487 void *hdr;
8488
8489 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8490 if (!msg)
8491 return;
8492
8493 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8494 if (!hdr) {
8495 nlmsg_free(msg);
8496 return;
8497 }
8498
8499 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8500 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8501 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8502 goto nla_put_failure;
8503
8504 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8505 if (!pinfoattr)
8506 goto nla_put_failure;
8507
8508 if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8509 goto nla_put_failure;
8510
8511 nla_nest_end(msg, pinfoattr);
8512
8513 genlmsg_end(msg, hdr);
8514
8515 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8516 nl80211_mlme_mcgrp.id, gfp);
8517 return;
8518
8519 nla_put_failure:
8520 genlmsg_cancel(msg, hdr);
8521 nlmsg_free(msg);
8522 }
8523
8524 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8525 u64 cookie, bool acked, gfp_t gfp)
8526 {
8527 struct wireless_dev *wdev = dev->ieee80211_ptr;
8528 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8529 struct sk_buff *msg;
8530 void *hdr;
8531 int err;
8532
8533 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8534 if (!msg)
8535 return;
8536
8537 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8538 if (!hdr) {
8539 nlmsg_free(msg);
8540 return;
8541 }
8542
8543 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8544 nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8545 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8546 nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8547 (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8548 goto nla_put_failure;
8549
8550 err = genlmsg_end(msg, hdr);
8551 if (err < 0) {
8552 nlmsg_free(msg);
8553 return;
8554 }
8555
8556 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8557 nl80211_mlme_mcgrp.id, gfp);
8558 return;
8559
8560 nla_put_failure:
8561 genlmsg_cancel(msg, hdr);
8562 nlmsg_free(msg);
8563 }
8564 EXPORT_SYMBOL(cfg80211_probe_status);
8565
8566 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8567 const u8 *frame, size_t len,
8568 int freq, int sig_dbm, gfp_t gfp)
8569 {
8570 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8571 struct sk_buff *msg;
8572 void *hdr;
8573 u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8574
8575 if (!nlpid)
8576 return;
8577
8578 msg = nlmsg_new(len + 100, gfp);
8579 if (!msg)
8580 return;
8581
8582 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8583 if (!hdr) {
8584 nlmsg_free(msg);
8585 return;
8586 }
8587
8588 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8589 (freq &&
8590 nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8591 (sig_dbm &&
8592 nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8593 nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8594 goto nla_put_failure;
8595
8596 genlmsg_end(msg, hdr);
8597
8598 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8599 return;
8600
8601 nla_put_failure:
8602 genlmsg_cancel(msg, hdr);
8603 nlmsg_free(msg);
8604 }
8605 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8606
8607 static int nl80211_netlink_notify(struct notifier_block * nb,
8608 unsigned long state,
8609 void *_notify)
8610 {
8611 struct netlink_notify *notify = _notify;
8612 struct cfg80211_registered_device *rdev;
8613 struct wireless_dev *wdev;
8614
8615 if (state != NETLINK_URELEASE)
8616 return NOTIFY_DONE;
8617
8618 rcu_read_lock();
8619
8620 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8621 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
8622 cfg80211_mlme_unregister_socket(wdev, notify->pid);
8623 if (rdev->ap_beacons_nlpid == notify->pid)
8624 rdev->ap_beacons_nlpid = 0;
8625 }
8626
8627 rcu_read_unlock();
8628
8629 return NOTIFY_DONE;
8630 }
8631
8632 static struct notifier_block nl80211_netlink_notifier = {
8633 .notifier_call = nl80211_netlink_notify,
8634 };
8635
8636 /* initialisation/exit functions */
8637
8638 int nl80211_init(void)
8639 {
8640 int err;
8641
8642 err = genl_register_family_with_ops(&nl80211_fam,
8643 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8644 if (err)
8645 return err;
8646
8647 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8648 if (err)
8649 goto err_out;
8650
8651 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8652 if (err)
8653 goto err_out;
8654
8655 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8656 if (err)
8657 goto err_out;
8658
8659 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8660 if (err)
8661 goto err_out;
8662
8663 #ifdef CONFIG_NL80211_TESTMODE
8664 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8665 if (err)
8666 goto err_out;
8667 #endif
8668
8669 err = netlink_register_notifier(&nl80211_netlink_notifier);
8670 if (err)
8671 goto err_out;
8672
8673 return 0;
8674 err_out:
8675 genl_unregister_family(&nl80211_fam);
8676 return err;
8677 }
8678
8679 void nl80211_exit(void)
8680 {
8681 netlink_unregister_notifier(&nl80211_netlink_notifier);
8682 genl_unregister_family(&nl80211_fam);
8683 }
Linux kernel - Deliverables
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