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cfg80211/mac80211: re-add get_channel operation
[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->ops->get_channel) {
1763 struct ieee80211_channel *chan;
1764 enum nl80211_channel_type channel_type;
1765
1766 chan = rdev->ops->get_channel(&rdev->wiphy, wdev,
1767 &channel_type);
1768 if (chan &&
1769 (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1770 chan->center_freq) ||
1771 nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1772 channel_type)))
1773 goto nla_put_failure;
1774 }
1775
1776 return genlmsg_end(msg, hdr);
1777
1778 nla_put_failure:
1779 genlmsg_cancel(msg, hdr);
1780 return -EMSGSIZE;
1781 }
1782
1783 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1784 {
1785 int wp_idx = 0;
1786 int if_idx = 0;
1787 int wp_start = cb->args[0];
1788 int if_start = cb->args[1];
1789 struct cfg80211_registered_device *rdev;
1790 struct wireless_dev *wdev;
1791
1792 mutex_lock(&cfg80211_mutex);
1793 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1794 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1795 continue;
1796 if (wp_idx < wp_start) {
1797 wp_idx++;
1798 continue;
1799 }
1800 if_idx = 0;
1801
1802 mutex_lock(&rdev->devlist_mtx);
1803 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1804 if (if_idx < if_start) {
1805 if_idx++;
1806 continue;
1807 }
1808 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1809 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1810 rdev, wdev) < 0) {
1811 mutex_unlock(&rdev->devlist_mtx);
1812 goto out;
1813 }
1814 if_idx++;
1815 }
1816 mutex_unlock(&rdev->devlist_mtx);
1817
1818 wp_idx++;
1819 }
1820 out:
1821 mutex_unlock(&cfg80211_mutex);
1822
1823 cb->args[0] = wp_idx;
1824 cb->args[1] = if_idx;
1825
1826 return skb->len;
1827 }
1828
1829 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1830 {
1831 struct sk_buff *msg;
1832 struct cfg80211_registered_device *dev = info->user_ptr[0];
1833 struct wireless_dev *wdev = info->user_ptr[1];
1834
1835 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1836 if (!msg)
1837 return -ENOMEM;
1838
1839 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1840 dev, wdev) < 0) {
1841 nlmsg_free(msg);
1842 return -ENOBUFS;
1843 }
1844
1845 return genlmsg_reply(msg, info);
1846 }
1847
1848 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1849 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1850 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1851 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1852 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1853 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1854 };
1855
1856 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1857 {
1858 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1859 int flag;
1860
1861 *mntrflags = 0;
1862
1863 if (!nla)
1864 return -EINVAL;
1865
1866 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1867 nla, mntr_flags_policy))
1868 return -EINVAL;
1869
1870 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1871 if (flags[flag])
1872 *mntrflags |= (1<<flag);
1873
1874 return 0;
1875 }
1876
1877 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1878 struct net_device *netdev, u8 use_4addr,
1879 enum nl80211_iftype iftype)
1880 {
1881 if (!use_4addr) {
1882 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1883 return -EBUSY;
1884 return 0;
1885 }
1886
1887 switch (iftype) {
1888 case NL80211_IFTYPE_AP_VLAN:
1889 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1890 return 0;
1891 break;
1892 case NL80211_IFTYPE_STATION:
1893 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1894 return 0;
1895 break;
1896 default:
1897 break;
1898 }
1899
1900 return -EOPNOTSUPP;
1901 }
1902
1903 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1904 {
1905 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1906 struct vif_params params;
1907 int err;
1908 enum nl80211_iftype otype, ntype;
1909 struct net_device *dev = info->user_ptr[1];
1910 u32 _flags, *flags = NULL;
1911 bool change = false;
1912
1913 memset(&params, 0, sizeof(params));
1914
1915 otype = ntype = dev->ieee80211_ptr->iftype;
1916
1917 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1918 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1919 if (otype != ntype)
1920 change = true;
1921 if (ntype > NL80211_IFTYPE_MAX)
1922 return -EINVAL;
1923 }
1924
1925 if (info->attrs[NL80211_ATTR_MESH_ID]) {
1926 struct wireless_dev *wdev = dev->ieee80211_ptr;
1927
1928 if (ntype != NL80211_IFTYPE_MESH_POINT)
1929 return -EINVAL;
1930 if (netif_running(dev))
1931 return -EBUSY;
1932
1933 wdev_lock(wdev);
1934 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1935 IEEE80211_MAX_MESH_ID_LEN);
1936 wdev->mesh_id_up_len =
1937 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1938 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1939 wdev->mesh_id_up_len);
1940 wdev_unlock(wdev);
1941 }
1942
1943 if (info->attrs[NL80211_ATTR_4ADDR]) {
1944 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1945 change = true;
1946 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1947 if (err)
1948 return err;
1949 } else {
1950 params.use_4addr = -1;
1951 }
1952
1953 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1954 if (ntype != NL80211_IFTYPE_MONITOR)
1955 return -EINVAL;
1956 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1957 &_flags);
1958 if (err)
1959 return err;
1960
1961 flags = &_flags;
1962 change = true;
1963 }
1964
1965 if (change)
1966 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1967 else
1968 err = 0;
1969
1970 if (!err && params.use_4addr != -1)
1971 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1972
1973 return err;
1974 }
1975
1976 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1977 {
1978 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1979 struct vif_params params;
1980 struct wireless_dev *wdev;
1981 struct sk_buff *msg;
1982 int err;
1983 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1984 u32 flags;
1985
1986 memset(&params, 0, sizeof(params));
1987
1988 if (!info->attrs[NL80211_ATTR_IFNAME])
1989 return -EINVAL;
1990
1991 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1992 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1993 if (type > NL80211_IFTYPE_MAX)
1994 return -EINVAL;
1995 }
1996
1997 if (!rdev->ops->add_virtual_intf ||
1998 !(rdev->wiphy.interface_modes & (1 << type)))
1999 return -EOPNOTSUPP;
2000
2001 if (info->attrs[NL80211_ATTR_4ADDR]) {
2002 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2003 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2004 if (err)
2005 return err;
2006 }
2007
2008 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2009 if (!msg)
2010 return -ENOMEM;
2011
2012 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2013 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2014 &flags);
2015 wdev = rdev->ops->add_virtual_intf(&rdev->wiphy,
2016 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2017 type, err ? NULL : &flags, &params);
2018 if (IS_ERR(wdev)) {
2019 nlmsg_free(msg);
2020 return PTR_ERR(wdev);
2021 }
2022
2023 if (type == NL80211_IFTYPE_MESH_POINT &&
2024 info->attrs[NL80211_ATTR_MESH_ID]) {
2025 wdev_lock(wdev);
2026 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2027 IEEE80211_MAX_MESH_ID_LEN);
2028 wdev->mesh_id_up_len =
2029 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2030 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2031 wdev->mesh_id_up_len);
2032 wdev_unlock(wdev);
2033 }
2034
2035 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
2036 rdev, wdev) < 0) {
2037 nlmsg_free(msg);
2038 return -ENOBUFS;
2039 }
2040
2041 return genlmsg_reply(msg, info);
2042 }
2043
2044 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2045 {
2046 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2047 struct wireless_dev *wdev = info->user_ptr[1];
2048
2049 if (!rdev->ops->del_virtual_intf)
2050 return -EOPNOTSUPP;
2051
2052 /*
2053 * If we remove a wireless device without a netdev then clear
2054 * user_ptr[1] so that nl80211_post_doit won't dereference it
2055 * to check if it needs to do dev_put(). Otherwise it crashes
2056 * since the wdev has been freed, unlike with a netdev where
2057 * we need the dev_put() for the netdev to really be freed.
2058 */
2059 if (!wdev->netdev)
2060 info->user_ptr[1] = NULL;
2061
2062 return rdev->ops->del_virtual_intf(&rdev->wiphy, wdev);
2063 }
2064
2065 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2066 {
2067 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2068 struct net_device *dev = info->user_ptr[1];
2069 u16 noack_map;
2070
2071 if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2072 return -EINVAL;
2073
2074 if (!rdev->ops->set_noack_map)
2075 return -EOPNOTSUPP;
2076
2077 noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2078
2079 return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
2080 }
2081
2082 struct get_key_cookie {
2083 struct sk_buff *msg;
2084 int error;
2085 int idx;
2086 };
2087
2088 static void get_key_callback(void *c, struct key_params *params)
2089 {
2090 struct nlattr *key;
2091 struct get_key_cookie *cookie = c;
2092
2093 if ((params->key &&
2094 nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2095 params->key_len, params->key)) ||
2096 (params->seq &&
2097 nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2098 params->seq_len, params->seq)) ||
2099 (params->cipher &&
2100 nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2101 params->cipher)))
2102 goto nla_put_failure;
2103
2104 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2105 if (!key)
2106 goto nla_put_failure;
2107
2108 if ((params->key &&
2109 nla_put(cookie->msg, NL80211_KEY_DATA,
2110 params->key_len, params->key)) ||
2111 (params->seq &&
2112 nla_put(cookie->msg, NL80211_KEY_SEQ,
2113 params->seq_len, params->seq)) ||
2114 (params->cipher &&
2115 nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2116 params->cipher)))
2117 goto nla_put_failure;
2118
2119 if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2120 goto nla_put_failure;
2121
2122 nla_nest_end(cookie->msg, key);
2123
2124 return;
2125 nla_put_failure:
2126 cookie->error = 1;
2127 }
2128
2129 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2130 {
2131 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2132 int err;
2133 struct net_device *dev = info->user_ptr[1];
2134 u8 key_idx = 0;
2135 const u8 *mac_addr = NULL;
2136 bool pairwise;
2137 struct get_key_cookie cookie = {
2138 .error = 0,
2139 };
2140 void *hdr;
2141 struct sk_buff *msg;
2142
2143 if (info->attrs[NL80211_ATTR_KEY_IDX])
2144 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2145
2146 if (key_idx > 5)
2147 return -EINVAL;
2148
2149 if (info->attrs[NL80211_ATTR_MAC])
2150 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2151
2152 pairwise = !!mac_addr;
2153 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2154 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2155 if (kt >= NUM_NL80211_KEYTYPES)
2156 return -EINVAL;
2157 if (kt != NL80211_KEYTYPE_GROUP &&
2158 kt != NL80211_KEYTYPE_PAIRWISE)
2159 return -EINVAL;
2160 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2161 }
2162
2163 if (!rdev->ops->get_key)
2164 return -EOPNOTSUPP;
2165
2166 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2167 if (!msg)
2168 return -ENOMEM;
2169
2170 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2171 NL80211_CMD_NEW_KEY);
2172 if (IS_ERR(hdr))
2173 return PTR_ERR(hdr);
2174
2175 cookie.msg = msg;
2176 cookie.idx = key_idx;
2177
2178 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2179 nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2180 goto nla_put_failure;
2181 if (mac_addr &&
2182 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2183 goto nla_put_failure;
2184
2185 if (pairwise && mac_addr &&
2186 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2187 return -ENOENT;
2188
2189 err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2190 mac_addr, &cookie, get_key_callback);
2191
2192 if (err)
2193 goto free_msg;
2194
2195 if (cookie.error)
2196 goto nla_put_failure;
2197
2198 genlmsg_end(msg, hdr);
2199 return genlmsg_reply(msg, info);
2200
2201 nla_put_failure:
2202 err = -ENOBUFS;
2203 free_msg:
2204 nlmsg_free(msg);
2205 return err;
2206 }
2207
2208 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2209 {
2210 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2211 struct key_parse key;
2212 int err;
2213 struct net_device *dev = info->user_ptr[1];
2214
2215 err = nl80211_parse_key(info, &key);
2216 if (err)
2217 return err;
2218
2219 if (key.idx < 0)
2220 return -EINVAL;
2221
2222 /* only support setting default key */
2223 if (!key.def && !key.defmgmt)
2224 return -EINVAL;
2225
2226 wdev_lock(dev->ieee80211_ptr);
2227
2228 if (key.def) {
2229 if (!rdev->ops->set_default_key) {
2230 err = -EOPNOTSUPP;
2231 goto out;
2232 }
2233
2234 err = nl80211_key_allowed(dev->ieee80211_ptr);
2235 if (err)
2236 goto out;
2237
2238 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2239 key.def_uni, key.def_multi);
2240
2241 if (err)
2242 goto out;
2243
2244 #ifdef CONFIG_CFG80211_WEXT
2245 dev->ieee80211_ptr->wext.default_key = key.idx;
2246 #endif
2247 } else {
2248 if (key.def_uni || !key.def_multi) {
2249 err = -EINVAL;
2250 goto out;
2251 }
2252
2253 if (!rdev->ops->set_default_mgmt_key) {
2254 err = -EOPNOTSUPP;
2255 goto out;
2256 }
2257
2258 err = nl80211_key_allowed(dev->ieee80211_ptr);
2259 if (err)
2260 goto out;
2261
2262 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2263 dev, key.idx);
2264 if (err)
2265 goto out;
2266
2267 #ifdef CONFIG_CFG80211_WEXT
2268 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2269 #endif
2270 }
2271
2272 out:
2273 wdev_unlock(dev->ieee80211_ptr);
2274
2275 return err;
2276 }
2277
2278 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2279 {
2280 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2281 int err;
2282 struct net_device *dev = info->user_ptr[1];
2283 struct key_parse key;
2284 const u8 *mac_addr = NULL;
2285
2286 err = nl80211_parse_key(info, &key);
2287 if (err)
2288 return err;
2289
2290 if (!key.p.key)
2291 return -EINVAL;
2292
2293 if (info->attrs[NL80211_ATTR_MAC])
2294 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2295
2296 if (key.type == -1) {
2297 if (mac_addr)
2298 key.type = NL80211_KEYTYPE_PAIRWISE;
2299 else
2300 key.type = NL80211_KEYTYPE_GROUP;
2301 }
2302
2303 /* for now */
2304 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2305 key.type != NL80211_KEYTYPE_GROUP)
2306 return -EINVAL;
2307
2308 if (!rdev->ops->add_key)
2309 return -EOPNOTSUPP;
2310
2311 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2312 key.type == NL80211_KEYTYPE_PAIRWISE,
2313 mac_addr))
2314 return -EINVAL;
2315
2316 wdev_lock(dev->ieee80211_ptr);
2317 err = nl80211_key_allowed(dev->ieee80211_ptr);
2318 if (!err)
2319 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2320 key.type == NL80211_KEYTYPE_PAIRWISE,
2321 mac_addr, &key.p);
2322 wdev_unlock(dev->ieee80211_ptr);
2323
2324 return err;
2325 }
2326
2327 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2328 {
2329 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2330 int err;
2331 struct net_device *dev = info->user_ptr[1];
2332 u8 *mac_addr = NULL;
2333 struct key_parse key;
2334
2335 err = nl80211_parse_key(info, &key);
2336 if (err)
2337 return err;
2338
2339 if (info->attrs[NL80211_ATTR_MAC])
2340 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2341
2342 if (key.type == -1) {
2343 if (mac_addr)
2344 key.type = NL80211_KEYTYPE_PAIRWISE;
2345 else
2346 key.type = NL80211_KEYTYPE_GROUP;
2347 }
2348
2349 /* for now */
2350 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2351 key.type != NL80211_KEYTYPE_GROUP)
2352 return -EINVAL;
2353
2354 if (!rdev->ops->del_key)
2355 return -EOPNOTSUPP;
2356
2357 wdev_lock(dev->ieee80211_ptr);
2358 err = nl80211_key_allowed(dev->ieee80211_ptr);
2359
2360 if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2361 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2362 err = -ENOENT;
2363
2364 if (!err)
2365 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2366 key.type == NL80211_KEYTYPE_PAIRWISE,
2367 mac_addr);
2368
2369 #ifdef CONFIG_CFG80211_WEXT
2370 if (!err) {
2371 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2372 dev->ieee80211_ptr->wext.default_key = -1;
2373 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2374 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2375 }
2376 #endif
2377 wdev_unlock(dev->ieee80211_ptr);
2378
2379 return err;
2380 }
2381
2382 static int nl80211_parse_beacon(struct genl_info *info,
2383 struct cfg80211_beacon_data *bcn)
2384 {
2385 bool haveinfo = false;
2386
2387 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2388 !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2389 !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2390 !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2391 return -EINVAL;
2392
2393 memset(bcn, 0, sizeof(*bcn));
2394
2395 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2396 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2397 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2398 if (!bcn->head_len)
2399 return -EINVAL;
2400 haveinfo = true;
2401 }
2402
2403 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2404 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2405 bcn->tail_len =
2406 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2407 haveinfo = true;
2408 }
2409
2410 if (!haveinfo)
2411 return -EINVAL;
2412
2413 if (info->attrs[NL80211_ATTR_IE]) {
2414 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2415 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2416 }
2417
2418 if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2419 bcn->proberesp_ies =
2420 nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2421 bcn->proberesp_ies_len =
2422 nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2423 }
2424
2425 if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2426 bcn->assocresp_ies =
2427 nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2428 bcn->assocresp_ies_len =
2429 nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2430 }
2431
2432 if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2433 bcn->probe_resp =
2434 nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2435 bcn->probe_resp_len =
2436 nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2437 }
2438
2439 return 0;
2440 }
2441
2442 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2443 struct cfg80211_ap_settings *params)
2444 {
2445 struct wireless_dev *wdev;
2446 bool ret = false;
2447
2448 mutex_lock(&rdev->devlist_mtx);
2449
2450 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2451 if (wdev->iftype != NL80211_IFTYPE_AP &&
2452 wdev->iftype != NL80211_IFTYPE_P2P_GO)
2453 continue;
2454
2455 if (!wdev->preset_chan)
2456 continue;
2457
2458 params->channel = wdev->preset_chan;
2459 params->channel_type = wdev->preset_chantype;
2460 ret = true;
2461 break;
2462 }
2463
2464 mutex_unlock(&rdev->devlist_mtx);
2465
2466 return ret;
2467 }
2468
2469 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2470 {
2471 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2472 struct net_device *dev = info->user_ptr[1];
2473 struct wireless_dev *wdev = dev->ieee80211_ptr;
2474 struct cfg80211_ap_settings params;
2475 int err;
2476
2477 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2478 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2479 return -EOPNOTSUPP;
2480
2481 if (!rdev->ops->start_ap)
2482 return -EOPNOTSUPP;
2483
2484 if (wdev->beacon_interval)
2485 return -EALREADY;
2486
2487 memset(&params, 0, sizeof(params));
2488
2489 /* these are required for START_AP */
2490 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2491 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2492 !info->attrs[NL80211_ATTR_BEACON_HEAD])
2493 return -EINVAL;
2494
2495 err = nl80211_parse_beacon(info, &params.beacon);
2496 if (err)
2497 return err;
2498
2499 params.beacon_interval =
2500 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2501 params.dtim_period =
2502 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2503
2504 err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2505 if (err)
2506 return err;
2507
2508 /*
2509 * In theory, some of these attributes should be required here
2510 * but since they were not used when the command was originally
2511 * added, keep them optional for old user space programs to let
2512 * them continue to work with drivers that do not need the
2513 * additional information -- drivers must check!
2514 */
2515 if (info->attrs[NL80211_ATTR_SSID]) {
2516 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2517 params.ssid_len =
2518 nla_len(info->attrs[NL80211_ATTR_SSID]);
2519 if (params.ssid_len == 0 ||
2520 params.ssid_len > IEEE80211_MAX_SSID_LEN)
2521 return -EINVAL;
2522 }
2523
2524 if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2525 params.hidden_ssid = nla_get_u32(
2526 info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2527 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2528 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2529 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2530 return -EINVAL;
2531 }
2532
2533 params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2534
2535 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2536 params.auth_type = nla_get_u32(
2537 info->attrs[NL80211_ATTR_AUTH_TYPE]);
2538 if (!nl80211_valid_auth_type(params.auth_type))
2539 return -EINVAL;
2540 } else
2541 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2542
2543 err = nl80211_crypto_settings(rdev, info, &params.crypto,
2544 NL80211_MAX_NR_CIPHER_SUITES);
2545 if (err)
2546 return err;
2547
2548 if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2549 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2550 return -EOPNOTSUPP;
2551 params.inactivity_timeout = nla_get_u16(
2552 info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2553 }
2554
2555 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2556 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2557
2558 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2559 !nl80211_valid_channel_type(info, &channel_type))
2560 return -EINVAL;
2561
2562 params.channel = rdev_freq_to_chan(rdev,
2563 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2564 channel_type);
2565 if (!params.channel)
2566 return -EINVAL;
2567 params.channel_type = channel_type;
2568 } else if (wdev->preset_chan) {
2569 params.channel = wdev->preset_chan;
2570 params.channel_type = wdev->preset_chantype;
2571 } else if (!nl80211_get_ap_channel(rdev, &params))
2572 return -EINVAL;
2573
2574 if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2575 params.channel_type))
2576 return -EINVAL;
2577
2578 mutex_lock(&rdev->devlist_mtx);
2579 err = cfg80211_can_use_chan(rdev, wdev, params.channel,
2580 CHAN_MODE_SHARED);
2581 mutex_unlock(&rdev->devlist_mtx);
2582
2583 if (err)
2584 return err;
2585
2586 err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2587 if (!err) {
2588 wdev->preset_chan = params.channel;
2589 wdev->preset_chantype = params.channel_type;
2590 wdev->beacon_interval = params.beacon_interval;
2591 wdev->channel = params.channel;
2592 }
2593 return err;
2594 }
2595
2596 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2597 {
2598 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2599 struct net_device *dev = info->user_ptr[1];
2600 struct wireless_dev *wdev = dev->ieee80211_ptr;
2601 struct cfg80211_beacon_data params;
2602 int err;
2603
2604 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2605 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2606 return -EOPNOTSUPP;
2607
2608 if (!rdev->ops->change_beacon)
2609 return -EOPNOTSUPP;
2610
2611 if (!wdev->beacon_interval)
2612 return -EINVAL;
2613
2614 err = nl80211_parse_beacon(info, &params);
2615 if (err)
2616 return err;
2617
2618 return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2619 }
2620
2621 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2622 {
2623 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2624 struct net_device *dev = info->user_ptr[1];
2625
2626 return cfg80211_stop_ap(rdev, dev);
2627 }
2628
2629 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2630 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2631 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2632 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2633 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2634 [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2635 [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2636 };
2637
2638 static int parse_station_flags(struct genl_info *info,
2639 enum nl80211_iftype iftype,
2640 struct station_parameters *params)
2641 {
2642 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2643 struct nlattr *nla;
2644 int flag;
2645
2646 /*
2647 * Try parsing the new attribute first so userspace
2648 * can specify both for older kernels.
2649 */
2650 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2651 if (nla) {
2652 struct nl80211_sta_flag_update *sta_flags;
2653
2654 sta_flags = nla_data(nla);
2655 params->sta_flags_mask = sta_flags->mask;
2656 params->sta_flags_set = sta_flags->set;
2657 if ((params->sta_flags_mask |
2658 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2659 return -EINVAL;
2660 return 0;
2661 }
2662
2663 /* if present, parse the old attribute */
2664
2665 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2666 if (!nla)
2667 return 0;
2668
2669 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2670 nla, sta_flags_policy))
2671 return -EINVAL;
2672
2673 /*
2674 * Only allow certain flags for interface types so that
2675 * other attributes are silently ignored. Remember that
2676 * this is backward compatibility code with old userspace
2677 * and shouldn't be hit in other cases anyway.
2678 */
2679 switch (iftype) {
2680 case NL80211_IFTYPE_AP:
2681 case NL80211_IFTYPE_AP_VLAN:
2682 case NL80211_IFTYPE_P2P_GO:
2683 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2684 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2685 BIT(NL80211_STA_FLAG_WME) |
2686 BIT(NL80211_STA_FLAG_MFP);
2687 break;
2688 case NL80211_IFTYPE_P2P_CLIENT:
2689 case NL80211_IFTYPE_STATION:
2690 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2691 BIT(NL80211_STA_FLAG_TDLS_PEER);
2692 break;
2693 case NL80211_IFTYPE_MESH_POINT:
2694 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2695 BIT(NL80211_STA_FLAG_MFP) |
2696 BIT(NL80211_STA_FLAG_AUTHORIZED);
2697 default:
2698 return -EINVAL;
2699 }
2700
2701 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2702 if (flags[flag]) {
2703 params->sta_flags_set |= (1<<flag);
2704
2705 /* no longer support new API additions in old API */
2706 if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2707 return -EINVAL;
2708 }
2709 }
2710
2711 return 0;
2712 }
2713
2714 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2715 int attr)
2716 {
2717 struct nlattr *rate;
2718 u32 bitrate;
2719 u16 bitrate_compat;
2720
2721 rate = nla_nest_start(msg, attr);
2722 if (!rate)
2723 goto nla_put_failure;
2724
2725 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2726 bitrate = cfg80211_calculate_bitrate(info);
2727 /* report 16-bit bitrate only if we can */
2728 bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2729 if ((bitrate > 0 &&
2730 nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate)) ||
2731 (bitrate_compat > 0 &&
2732 nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat)) ||
2733 ((info->flags & RATE_INFO_FLAGS_MCS) &&
2734 nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2735 ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2736 nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2737 ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2738 nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2739 goto nla_put_failure;
2740
2741 nla_nest_end(msg, rate);
2742 return true;
2743
2744 nla_put_failure:
2745 return false;
2746 }
2747
2748 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2749 int flags,
2750 struct cfg80211_registered_device *rdev,
2751 struct net_device *dev,
2752 const u8 *mac_addr, struct station_info *sinfo)
2753 {
2754 void *hdr;
2755 struct nlattr *sinfoattr, *bss_param;
2756
2757 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2758 if (!hdr)
2759 return -1;
2760
2761 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2762 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2763 nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2764 goto nla_put_failure;
2765
2766 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2767 if (!sinfoattr)
2768 goto nla_put_failure;
2769 if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2770 nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2771 sinfo->connected_time))
2772 goto nla_put_failure;
2773 if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2774 nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2775 sinfo->inactive_time))
2776 goto nla_put_failure;
2777 if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2778 nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2779 sinfo->rx_bytes))
2780 goto nla_put_failure;
2781 if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2782 nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2783 sinfo->tx_bytes))
2784 goto nla_put_failure;
2785 if ((sinfo->filled & STATION_INFO_LLID) &&
2786 nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2787 goto nla_put_failure;
2788 if ((sinfo->filled & STATION_INFO_PLID) &&
2789 nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2790 goto nla_put_failure;
2791 if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2792 nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2793 sinfo->plink_state))
2794 goto nla_put_failure;
2795 switch (rdev->wiphy.signal_type) {
2796 case CFG80211_SIGNAL_TYPE_MBM:
2797 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2798 nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2799 sinfo->signal))
2800 goto nla_put_failure;
2801 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2802 nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2803 sinfo->signal_avg))
2804 goto nla_put_failure;
2805 break;
2806 default:
2807 break;
2808 }
2809 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2810 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2811 NL80211_STA_INFO_TX_BITRATE))
2812 goto nla_put_failure;
2813 }
2814 if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2815 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2816 NL80211_STA_INFO_RX_BITRATE))
2817 goto nla_put_failure;
2818 }
2819 if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2820 nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2821 sinfo->rx_packets))
2822 goto nla_put_failure;
2823 if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2824 nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2825 sinfo->tx_packets))
2826 goto nla_put_failure;
2827 if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2828 nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2829 sinfo->tx_retries))
2830 goto nla_put_failure;
2831 if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2832 nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2833 sinfo->tx_failed))
2834 goto nla_put_failure;
2835 if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2836 nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2837 sinfo->beacon_loss_count))
2838 goto nla_put_failure;
2839 if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2840 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2841 if (!bss_param)
2842 goto nla_put_failure;
2843
2844 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2845 nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2846 ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2847 nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2848 ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2849 nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2850 nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2851 sinfo->bss_param.dtim_period) ||
2852 nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2853 sinfo->bss_param.beacon_interval))
2854 goto nla_put_failure;
2855
2856 nla_nest_end(msg, bss_param);
2857 }
2858 if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2859 nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2860 sizeof(struct nl80211_sta_flag_update),
2861 &sinfo->sta_flags))
2862 goto nla_put_failure;
2863 if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2864 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2865 sinfo->t_offset))
2866 goto nla_put_failure;
2867 nla_nest_end(msg, sinfoattr);
2868
2869 if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2870 nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2871 sinfo->assoc_req_ies))
2872 goto nla_put_failure;
2873
2874 return genlmsg_end(msg, hdr);
2875
2876 nla_put_failure:
2877 genlmsg_cancel(msg, hdr);
2878 return -EMSGSIZE;
2879 }
2880
2881 static int nl80211_dump_station(struct sk_buff *skb,
2882 struct netlink_callback *cb)
2883 {
2884 struct station_info sinfo;
2885 struct cfg80211_registered_device *dev;
2886 struct net_device *netdev;
2887 u8 mac_addr[ETH_ALEN];
2888 int sta_idx = cb->args[1];
2889 int err;
2890
2891 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2892 if (err)
2893 return err;
2894
2895 if (!dev->ops->dump_station) {
2896 err = -EOPNOTSUPP;
2897 goto out_err;
2898 }
2899
2900 while (1) {
2901 memset(&sinfo, 0, sizeof(sinfo));
2902 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2903 mac_addr, &sinfo);
2904 if (err == -ENOENT)
2905 break;
2906 if (err)
2907 goto out_err;
2908
2909 if (nl80211_send_station(skb,
2910 NETLINK_CB(cb->skb).pid,
2911 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2912 dev, netdev, mac_addr,
2913 &sinfo) < 0)
2914 goto out;
2915
2916 sta_idx++;
2917 }
2918
2919
2920 out:
2921 cb->args[1] = sta_idx;
2922 err = skb->len;
2923 out_err:
2924 nl80211_finish_netdev_dump(dev);
2925
2926 return err;
2927 }
2928
2929 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2930 {
2931 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2932 struct net_device *dev = info->user_ptr[1];
2933 struct station_info sinfo;
2934 struct sk_buff *msg;
2935 u8 *mac_addr = NULL;
2936 int err;
2937
2938 memset(&sinfo, 0, sizeof(sinfo));
2939
2940 if (!info->attrs[NL80211_ATTR_MAC])
2941 return -EINVAL;
2942
2943 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2944
2945 if (!rdev->ops->get_station)
2946 return -EOPNOTSUPP;
2947
2948 err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2949 if (err)
2950 return err;
2951
2952 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2953 if (!msg)
2954 return -ENOMEM;
2955
2956 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2957 rdev, dev, mac_addr, &sinfo) < 0) {
2958 nlmsg_free(msg);
2959 return -ENOBUFS;
2960 }
2961
2962 return genlmsg_reply(msg, info);
2963 }
2964
2965 /*
2966 * Get vlan interface making sure it is running and on the right wiphy.
2967 */
2968 static struct net_device *get_vlan(struct genl_info *info,
2969 struct cfg80211_registered_device *rdev)
2970 {
2971 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2972 struct net_device *v;
2973 int ret;
2974
2975 if (!vlanattr)
2976 return NULL;
2977
2978 v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2979 if (!v)
2980 return ERR_PTR(-ENODEV);
2981
2982 if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2983 ret = -EINVAL;
2984 goto error;
2985 }
2986
2987 if (!netif_running(v)) {
2988 ret = -ENETDOWN;
2989 goto error;
2990 }
2991
2992 return v;
2993 error:
2994 dev_put(v);
2995 return ERR_PTR(ret);
2996 }
2997
2998 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2999 {
3000 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3001 int err;
3002 struct net_device *dev = info->user_ptr[1];
3003 struct station_parameters params;
3004 u8 *mac_addr = NULL;
3005
3006 memset(&params, 0, sizeof(params));
3007
3008 params.listen_interval = -1;
3009 params.plink_state = -1;
3010
3011 if (info->attrs[NL80211_ATTR_STA_AID])
3012 return -EINVAL;
3013
3014 if (!info->attrs[NL80211_ATTR_MAC])
3015 return -EINVAL;
3016
3017 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3018
3019 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3020 params.supported_rates =
3021 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3022 params.supported_rates_len =
3023 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3024 }
3025
3026 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3027 params.listen_interval =
3028 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3029
3030 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3031 params.ht_capa =
3032 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3033
3034 if (!rdev->ops->change_station)
3035 return -EOPNOTSUPP;
3036
3037 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3038 return -EINVAL;
3039
3040 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3041 params.plink_action =
3042 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3043
3044 if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3045 params.plink_state =
3046 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3047
3048 switch (dev->ieee80211_ptr->iftype) {
3049 case NL80211_IFTYPE_AP:
3050 case NL80211_IFTYPE_AP_VLAN:
3051 case NL80211_IFTYPE_P2P_GO:
3052 /* disallow mesh-specific things */
3053 if (params.plink_action)
3054 return -EINVAL;
3055
3056 /* TDLS can't be set, ... */
3057 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3058 return -EINVAL;
3059 /*
3060 * ... but don't bother the driver with it. This works around
3061 * a hostapd/wpa_supplicant issue -- it always includes the
3062 * TLDS_PEER flag in the mask even for AP mode.
3063 */
3064 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3065
3066 /* accept only the listed bits */
3067 if (params.sta_flags_mask &
3068 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3069 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3070 BIT(NL80211_STA_FLAG_WME) |
3071 BIT(NL80211_STA_FLAG_MFP)))
3072 return -EINVAL;
3073
3074 /* must be last in here for error handling */
3075 params.vlan = get_vlan(info, rdev);
3076 if (IS_ERR(params.vlan))
3077 return PTR_ERR(params.vlan);
3078 break;
3079 case NL80211_IFTYPE_P2P_CLIENT:
3080 case NL80211_IFTYPE_STATION:
3081 /*
3082 * Don't allow userspace to change the TDLS_PEER flag,
3083 * but silently ignore attempts to change it since we
3084 * don't have state here to verify that it doesn't try
3085 * to change the flag.
3086 */
3087 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3088 /* fall through */
3089 case NL80211_IFTYPE_ADHOC:
3090 /* disallow things sta doesn't support */
3091 if (params.plink_action)
3092 return -EINVAL;
3093 if (params.ht_capa)
3094 return -EINVAL;
3095 if (params.listen_interval >= 0)
3096 return -EINVAL;
3097 /* reject any changes other than AUTHORIZED */
3098 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3099 return -EINVAL;
3100 break;
3101 case NL80211_IFTYPE_MESH_POINT:
3102 /* disallow things mesh doesn't support */
3103 if (params.vlan)
3104 return -EINVAL;
3105 if (params.ht_capa)
3106 return -EINVAL;
3107 if (params.listen_interval >= 0)
3108 return -EINVAL;
3109 /*
3110 * No special handling for TDLS here -- the userspace
3111 * mesh code doesn't have this bug.
3112 */
3113 if (params.sta_flags_mask &
3114 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3115 BIT(NL80211_STA_FLAG_MFP) |
3116 BIT(NL80211_STA_FLAG_AUTHORIZED)))
3117 return -EINVAL;
3118 break;
3119 default:
3120 return -EOPNOTSUPP;
3121 }
3122
3123 /* be aware of params.vlan when changing code here */
3124
3125 err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
3126
3127 if (params.vlan)
3128 dev_put(params.vlan);
3129
3130 return err;
3131 }
3132
3133 static struct nla_policy
3134 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3135 [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3136 [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3137 };
3138
3139 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3140 {
3141 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3142 int err;
3143 struct net_device *dev = info->user_ptr[1];
3144 struct station_parameters params;
3145 u8 *mac_addr = NULL;
3146
3147 memset(&params, 0, sizeof(params));
3148
3149 if (!info->attrs[NL80211_ATTR_MAC])
3150 return -EINVAL;
3151
3152 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3153 return -EINVAL;
3154
3155 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3156 return -EINVAL;
3157
3158 if (!info->attrs[NL80211_ATTR_STA_AID])
3159 return -EINVAL;
3160
3161 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3162 params.supported_rates =
3163 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3164 params.supported_rates_len =
3165 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3166 params.listen_interval =
3167 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3168
3169 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3170 if (!params.aid || params.aid > IEEE80211_MAX_AID)
3171 return -EINVAL;
3172
3173 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3174 params.ht_capa =
3175 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3176
3177 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3178 params.plink_action =
3179 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3180
3181 if (!rdev->ops->add_station)
3182 return -EOPNOTSUPP;
3183
3184 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3185 return -EINVAL;
3186
3187 switch (dev->ieee80211_ptr->iftype) {
3188 case NL80211_IFTYPE_AP:
3189 case NL80211_IFTYPE_AP_VLAN:
3190 case NL80211_IFTYPE_P2P_GO:
3191 /* parse WME attributes if sta is WME capable */
3192 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3193 (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3194 info->attrs[NL80211_ATTR_STA_WME]) {
3195 struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3196 struct nlattr *nla;
3197
3198 nla = info->attrs[NL80211_ATTR_STA_WME];
3199 err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3200 nl80211_sta_wme_policy);
3201 if (err)
3202 return err;
3203
3204 if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3205 params.uapsd_queues =
3206 nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3207 if (params.uapsd_queues &
3208 ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3209 return -EINVAL;
3210
3211 if (tb[NL80211_STA_WME_MAX_SP])
3212 params.max_sp =
3213 nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3214
3215 if (params.max_sp &
3216 ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3217 return -EINVAL;
3218
3219 params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3220 }
3221 /* TDLS peers cannot be added */
3222 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3223 return -EINVAL;
3224 /* but don't bother the driver with it */
3225 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3226
3227 /* must be last in here for error handling */
3228 params.vlan = get_vlan(info, rdev);
3229 if (IS_ERR(params.vlan))
3230 return PTR_ERR(params.vlan);
3231 break;
3232 case NL80211_IFTYPE_MESH_POINT:
3233 /* TDLS peers cannot be added */
3234 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3235 return -EINVAL;
3236 break;
3237 case NL80211_IFTYPE_STATION:
3238 /* Only TDLS peers can be added */
3239 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3240 return -EINVAL;
3241 /* Can only add if TDLS ... */
3242 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3243 return -EOPNOTSUPP;
3244 /* ... with external setup is supported */
3245 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3246 return -EOPNOTSUPP;
3247 break;
3248 default:
3249 return -EOPNOTSUPP;
3250 }
3251
3252 /* be aware of params.vlan when changing code here */
3253
3254 err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3255
3256 if (params.vlan)
3257 dev_put(params.vlan);
3258 return err;
3259 }
3260
3261 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3262 {
3263 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3264 struct net_device *dev = info->user_ptr[1];
3265 u8 *mac_addr = NULL;
3266
3267 if (info->attrs[NL80211_ATTR_MAC])
3268 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3269
3270 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3271 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3272 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3273 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3274 return -EINVAL;
3275
3276 if (!rdev->ops->del_station)
3277 return -EOPNOTSUPP;
3278
3279 return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3280 }
3281
3282 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3283 int flags, struct net_device *dev,
3284 u8 *dst, u8 *next_hop,
3285 struct mpath_info *pinfo)
3286 {
3287 void *hdr;
3288 struct nlattr *pinfoattr;
3289
3290 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3291 if (!hdr)
3292 return -1;
3293
3294 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3295 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3296 nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3297 nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3298 goto nla_put_failure;
3299
3300 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3301 if (!pinfoattr)
3302 goto nla_put_failure;
3303 if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3304 nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3305 pinfo->frame_qlen))
3306 goto nla_put_failure;
3307 if (((pinfo->filled & MPATH_INFO_SN) &&
3308 nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3309 ((pinfo->filled & MPATH_INFO_METRIC) &&
3310 nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3311 pinfo->metric)) ||
3312 ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3313 nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3314 pinfo->exptime)) ||
3315 ((pinfo->filled & MPATH_INFO_FLAGS) &&
3316 nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3317 pinfo->flags)) ||
3318 ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3319 nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3320 pinfo->discovery_timeout)) ||
3321 ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3322 nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3323 pinfo->discovery_retries)))
3324 goto nla_put_failure;
3325
3326 nla_nest_end(msg, pinfoattr);
3327
3328 return genlmsg_end(msg, hdr);
3329
3330 nla_put_failure:
3331 genlmsg_cancel(msg, hdr);
3332 return -EMSGSIZE;
3333 }
3334
3335 static int nl80211_dump_mpath(struct sk_buff *skb,
3336 struct netlink_callback *cb)
3337 {
3338 struct mpath_info pinfo;
3339 struct cfg80211_registered_device *dev;
3340 struct net_device *netdev;
3341 u8 dst[ETH_ALEN];
3342 u8 next_hop[ETH_ALEN];
3343 int path_idx = cb->args[1];
3344 int err;
3345
3346 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3347 if (err)
3348 return err;
3349
3350 if (!dev->ops->dump_mpath) {
3351 err = -EOPNOTSUPP;
3352 goto out_err;
3353 }
3354
3355 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3356 err = -EOPNOTSUPP;
3357 goto out_err;
3358 }
3359
3360 while (1) {
3361 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3362 dst, next_hop, &pinfo);
3363 if (err == -ENOENT)
3364 break;
3365 if (err)
3366 goto out_err;
3367
3368 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3369 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3370 netdev, dst, next_hop,
3371 &pinfo) < 0)
3372 goto out;
3373
3374 path_idx++;
3375 }
3376
3377
3378 out:
3379 cb->args[1] = path_idx;
3380 err = skb->len;
3381 out_err:
3382 nl80211_finish_netdev_dump(dev);
3383 return err;
3384 }
3385
3386 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3387 {
3388 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3389 int err;
3390 struct net_device *dev = info->user_ptr[1];
3391 struct mpath_info pinfo;
3392 struct sk_buff *msg;
3393 u8 *dst = NULL;
3394 u8 next_hop[ETH_ALEN];
3395
3396 memset(&pinfo, 0, sizeof(pinfo));
3397
3398 if (!info->attrs[NL80211_ATTR_MAC])
3399 return -EINVAL;
3400
3401 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3402
3403 if (!rdev->ops->get_mpath)
3404 return -EOPNOTSUPP;
3405
3406 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3407 return -EOPNOTSUPP;
3408
3409 err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3410 if (err)
3411 return err;
3412
3413 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3414 if (!msg)
3415 return -ENOMEM;
3416
3417 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3418 dev, dst, next_hop, &pinfo) < 0) {
3419 nlmsg_free(msg);
3420 return -ENOBUFS;
3421 }
3422
3423 return genlmsg_reply(msg, info);
3424 }
3425
3426 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3427 {
3428 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3429 struct net_device *dev = info->user_ptr[1];
3430 u8 *dst = NULL;
3431 u8 *next_hop = NULL;
3432
3433 if (!info->attrs[NL80211_ATTR_MAC])
3434 return -EINVAL;
3435
3436 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3437 return -EINVAL;
3438
3439 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3440 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3441
3442 if (!rdev->ops->change_mpath)
3443 return -EOPNOTSUPP;
3444
3445 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3446 return -EOPNOTSUPP;
3447
3448 return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3449 }
3450
3451 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3452 {
3453 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3454 struct net_device *dev = info->user_ptr[1];
3455 u8 *dst = NULL;
3456 u8 *next_hop = NULL;
3457
3458 if (!info->attrs[NL80211_ATTR_MAC])
3459 return -EINVAL;
3460
3461 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3462 return -EINVAL;
3463
3464 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3465 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3466
3467 if (!rdev->ops->add_mpath)
3468 return -EOPNOTSUPP;
3469
3470 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3471 return -EOPNOTSUPP;
3472
3473 return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3474 }
3475
3476 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3477 {
3478 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3479 struct net_device *dev = info->user_ptr[1];
3480 u8 *dst = NULL;
3481
3482 if (info->attrs[NL80211_ATTR_MAC])
3483 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3484
3485 if (!rdev->ops->del_mpath)
3486 return -EOPNOTSUPP;
3487
3488 return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3489 }
3490
3491 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3492 {
3493 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3494 struct net_device *dev = info->user_ptr[1];
3495 struct bss_parameters params;
3496
3497 memset(&params, 0, sizeof(params));
3498 /* default to not changing parameters */
3499 params.use_cts_prot = -1;
3500 params.use_short_preamble = -1;
3501 params.use_short_slot_time = -1;
3502 params.ap_isolate = -1;
3503 params.ht_opmode = -1;
3504
3505 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3506 params.use_cts_prot =
3507 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3508 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3509 params.use_short_preamble =
3510 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3511 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3512 params.use_short_slot_time =
3513 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3514 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3515 params.basic_rates =
3516 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3517 params.basic_rates_len =
3518 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3519 }
3520 if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3521 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3522 if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3523 params.ht_opmode =
3524 nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3525
3526 if (!rdev->ops->change_bss)
3527 return -EOPNOTSUPP;
3528
3529 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3530 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3531 return -EOPNOTSUPP;
3532
3533 return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3534 }
3535
3536 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3537 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
3538 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
3539 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
3540 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
3541 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
3542 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
3543 };
3544
3545 static int parse_reg_rule(struct nlattr *tb[],
3546 struct ieee80211_reg_rule *reg_rule)
3547 {
3548 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3549 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3550
3551 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3552 return -EINVAL;
3553 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3554 return -EINVAL;
3555 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3556 return -EINVAL;
3557 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3558 return -EINVAL;
3559 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3560 return -EINVAL;
3561
3562 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3563
3564 freq_range->start_freq_khz =
3565 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3566 freq_range->end_freq_khz =
3567 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3568 freq_range->max_bandwidth_khz =
3569 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3570
3571 power_rule->max_eirp =
3572 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3573
3574 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3575 power_rule->max_antenna_gain =
3576 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3577
3578 return 0;
3579 }
3580
3581 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3582 {
3583 int r;
3584 char *data = NULL;
3585
3586 /*
3587 * You should only get this when cfg80211 hasn't yet initialized
3588 * completely when built-in to the kernel right between the time
3589 * window between nl80211_init() and regulatory_init(), if that is
3590 * even possible.
3591 */
3592 mutex_lock(&cfg80211_mutex);
3593 if (unlikely(!cfg80211_regdomain)) {
3594 mutex_unlock(&cfg80211_mutex);
3595 return -EINPROGRESS;
3596 }
3597 mutex_unlock(&cfg80211_mutex);
3598
3599 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3600 return -EINVAL;
3601
3602 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3603
3604 r = regulatory_hint_user(data);
3605
3606 return r;
3607 }
3608
3609 static int nl80211_get_mesh_config(struct sk_buff *skb,
3610 struct genl_info *info)
3611 {
3612 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3613 struct net_device *dev = info->user_ptr[1];
3614 struct wireless_dev *wdev = dev->ieee80211_ptr;
3615 struct mesh_config cur_params;
3616 int err = 0;
3617 void *hdr;
3618 struct nlattr *pinfoattr;
3619 struct sk_buff *msg;
3620
3621 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3622 return -EOPNOTSUPP;
3623
3624 if (!rdev->ops->get_mesh_config)
3625 return -EOPNOTSUPP;
3626
3627 wdev_lock(wdev);
3628 /* If not connected, get default parameters */
3629 if (!wdev->mesh_id_len)
3630 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3631 else
3632 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3633 &cur_params);
3634 wdev_unlock(wdev);
3635
3636 if (err)
3637 return err;
3638
3639 /* Draw up a netlink message to send back */
3640 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3641 if (!msg)
3642 return -ENOMEM;
3643 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3644 NL80211_CMD_GET_MESH_CONFIG);
3645 if (!hdr)
3646 goto out;
3647 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3648 if (!pinfoattr)
3649 goto nla_put_failure;
3650 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3651 nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3652 cur_params.dot11MeshRetryTimeout) ||
3653 nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3654 cur_params.dot11MeshConfirmTimeout) ||
3655 nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3656 cur_params.dot11MeshHoldingTimeout) ||
3657 nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3658 cur_params.dot11MeshMaxPeerLinks) ||
3659 nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3660 cur_params.dot11MeshMaxRetries) ||
3661 nla_put_u8(msg, NL80211_MESHCONF_TTL,
3662 cur_params.dot11MeshTTL) ||
3663 nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3664 cur_params.element_ttl) ||
3665 nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3666 cur_params.auto_open_plinks) ||
3667 nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3668 cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3669 nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3670 cur_params.dot11MeshHWMPmaxPREQretries) ||
3671 nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3672 cur_params.path_refresh_time) ||
3673 nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3674 cur_params.min_discovery_timeout) ||
3675 nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3676 cur_params.dot11MeshHWMPactivePathTimeout) ||
3677 nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3678 cur_params.dot11MeshHWMPpreqMinInterval) ||
3679 nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3680 cur_params.dot11MeshHWMPperrMinInterval) ||
3681 nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3682 cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3683 nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3684 cur_params.dot11MeshHWMPRootMode) ||
3685 nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3686 cur_params.dot11MeshHWMPRannInterval) ||
3687 nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3688 cur_params.dot11MeshGateAnnouncementProtocol) ||
3689 nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3690 cur_params.dot11MeshForwarding) ||
3691 nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3692 cur_params.rssi_threshold) ||
3693 nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3694 cur_params.ht_opmode) ||
3695 nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3696 cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3697 nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3698 cur_params.dot11MeshHWMProotInterval) ||
3699 nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3700 cur_params.dot11MeshHWMPconfirmationInterval))
3701 goto nla_put_failure;
3702 nla_nest_end(msg, pinfoattr);
3703 genlmsg_end(msg, hdr);
3704 return genlmsg_reply(msg, info);
3705
3706 nla_put_failure:
3707 genlmsg_cancel(msg, hdr);
3708 out:
3709 nlmsg_free(msg);
3710 return -ENOBUFS;
3711 }
3712
3713 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3714 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3715 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3716 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3717 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3718 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3719 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3720 [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3721 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3722 [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3723 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3724 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3725 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3726 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3727 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3728 [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3729 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3730 [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3731 [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3732 [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3733 [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3734 [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3735 [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3736 [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3737 [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3738 [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3739 };
3740
3741 static const struct nla_policy
3742 nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3743 [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3744 [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3745 [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3746 [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3747 [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3748 .len = IEEE80211_MAX_DATA_LEN },
3749 [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3750 };
3751
3752 static int nl80211_parse_mesh_config(struct genl_info *info,
3753 struct mesh_config *cfg,
3754 u32 *mask_out)
3755 {
3756 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3757 u32 mask = 0;
3758
3759 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3760 do {\
3761 if (table[attr_num]) {\
3762 cfg->param = nla_fn(table[attr_num]); \
3763 mask |= (1 << (attr_num - 1)); \
3764 } \
3765 } while (0);\
3766
3767
3768 if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3769 return -EINVAL;
3770 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3771 info->attrs[NL80211_ATTR_MESH_CONFIG],
3772 nl80211_meshconf_params_policy))
3773 return -EINVAL;
3774
3775 /* This makes sure that there aren't more than 32 mesh config
3776 * parameters (otherwise our bitfield scheme would not work.) */
3777 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3778
3779 /* Fill in the params struct */
3780 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3781 mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3782 nla_get_u16);
3783 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3784 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3785 nla_get_u16);
3786 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3787 mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3788 nla_get_u16);
3789 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3790 mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3791 nla_get_u16);
3792 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3793 mask, NL80211_MESHCONF_MAX_RETRIES,
3794 nla_get_u8);
3795 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3796 mask, NL80211_MESHCONF_TTL, nla_get_u8);
3797 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3798 mask, NL80211_MESHCONF_ELEMENT_TTL,
3799 nla_get_u8);
3800 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3801 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3802 nla_get_u8);
3803 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3804 NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3805 nla_get_u32);
3806 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3807 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3808 nla_get_u8);
3809 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3810 mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3811 nla_get_u32);
3812 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3813 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3814 nla_get_u16);
3815 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3816 NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3817 nla_get_u32);
3818 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3819 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3820 nla_get_u16);
3821 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3822 mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3823 nla_get_u16);
3824 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3825 dot11MeshHWMPnetDiameterTraversalTime, mask,
3826 NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3827 nla_get_u16);
3828 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3829 NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3830 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3831 NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3832 nla_get_u16);
3833 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3834 dot11MeshGateAnnouncementProtocol, mask,
3835 NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3836 nla_get_u8);
3837 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3838 mask, NL80211_MESHCONF_FORWARDING,
3839 nla_get_u8);
3840 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3841 mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3842 nla_get_u32);
3843 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3844 mask, NL80211_MESHCONF_HT_OPMODE,
3845 nla_get_u16);
3846 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3847 mask,
3848 NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3849 nla_get_u32);
3850 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3851 mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3852 nla_get_u16);
3853 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3854 dot11MeshHWMPconfirmationInterval, mask,
3855 NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3856 nla_get_u16);
3857 if (mask_out)
3858 *mask_out = mask;
3859
3860 return 0;
3861
3862 #undef FILL_IN_MESH_PARAM_IF_SET
3863 }
3864
3865 static int nl80211_parse_mesh_setup(struct genl_info *info,
3866 struct mesh_setup *setup)
3867 {
3868 struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3869
3870 if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3871 return -EINVAL;
3872 if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3873 info->attrs[NL80211_ATTR_MESH_SETUP],
3874 nl80211_mesh_setup_params_policy))
3875 return -EINVAL;
3876
3877 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3878 setup->sync_method =
3879 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3880 IEEE80211_SYNC_METHOD_VENDOR :
3881 IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3882
3883 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3884 setup->path_sel_proto =
3885 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3886 IEEE80211_PATH_PROTOCOL_VENDOR :
3887 IEEE80211_PATH_PROTOCOL_HWMP;
3888
3889 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3890 setup->path_metric =
3891 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3892 IEEE80211_PATH_METRIC_VENDOR :
3893 IEEE80211_PATH_METRIC_AIRTIME;
3894
3895
3896 if (tb[NL80211_MESH_SETUP_IE]) {
3897 struct nlattr *ieattr =
3898 tb[NL80211_MESH_SETUP_IE];
3899 if (!is_valid_ie_attr(ieattr))
3900 return -EINVAL;
3901 setup->ie = nla_data(ieattr);
3902 setup->ie_len = nla_len(ieattr);
3903 }
3904 setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3905 setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3906
3907 return 0;
3908 }
3909
3910 static int nl80211_update_mesh_config(struct sk_buff *skb,
3911 struct genl_info *info)
3912 {
3913 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3914 struct net_device *dev = info->user_ptr[1];
3915 struct wireless_dev *wdev = dev->ieee80211_ptr;
3916 struct mesh_config cfg;
3917 u32 mask;
3918 int err;
3919
3920 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3921 return -EOPNOTSUPP;
3922
3923 if (!rdev->ops->update_mesh_config)
3924 return -EOPNOTSUPP;
3925
3926 err = nl80211_parse_mesh_config(info, &cfg, &mask);
3927 if (err)
3928 return err;
3929
3930 wdev_lock(wdev);
3931 if (!wdev->mesh_id_len)
3932 err = -ENOLINK;
3933
3934 if (!err)
3935 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3936 mask, &cfg);
3937
3938 wdev_unlock(wdev);
3939
3940 return err;
3941 }
3942
3943 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3944 {
3945 struct sk_buff *msg;
3946 void *hdr = NULL;
3947 struct nlattr *nl_reg_rules;
3948 unsigned int i;
3949 int err = -EINVAL;
3950
3951 mutex_lock(&cfg80211_mutex);
3952
3953 if (!cfg80211_regdomain)
3954 goto out;
3955
3956 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3957 if (!msg) {
3958 err = -ENOBUFS;
3959 goto out;
3960 }
3961
3962 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3963 NL80211_CMD_GET_REG);
3964 if (!hdr)
3965 goto put_failure;
3966
3967 if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3968 cfg80211_regdomain->alpha2) ||
3969 (cfg80211_regdomain->dfs_region &&
3970 nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3971 cfg80211_regdomain->dfs_region)))
3972 goto nla_put_failure;
3973
3974 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3975 if (!nl_reg_rules)
3976 goto nla_put_failure;
3977
3978 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3979 struct nlattr *nl_reg_rule;
3980 const struct ieee80211_reg_rule *reg_rule;
3981 const struct ieee80211_freq_range *freq_range;
3982 const struct ieee80211_power_rule *power_rule;
3983
3984 reg_rule = &cfg80211_regdomain->reg_rules[i];
3985 freq_range = &reg_rule->freq_range;
3986 power_rule = &reg_rule->power_rule;
3987
3988 nl_reg_rule = nla_nest_start(msg, i);
3989 if (!nl_reg_rule)
3990 goto nla_put_failure;
3991
3992 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3993 reg_rule->flags) ||
3994 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3995 freq_range->start_freq_khz) ||
3996 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3997 freq_range->end_freq_khz) ||
3998 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3999 freq_range->max_bandwidth_khz) ||
4000 nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4001 power_rule->max_antenna_gain) ||
4002 nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4003 power_rule->max_eirp))
4004 goto nla_put_failure;
4005
4006 nla_nest_end(msg, nl_reg_rule);
4007 }
4008
4009 nla_nest_end(msg, nl_reg_rules);
4010
4011 genlmsg_end(msg, hdr);
4012 err = genlmsg_reply(msg, info);
4013 goto out;
4014
4015 nla_put_failure:
4016 genlmsg_cancel(msg, hdr);
4017 put_failure:
4018 nlmsg_free(msg);
4019 err = -EMSGSIZE;
4020 out:
4021 mutex_unlock(&cfg80211_mutex);
4022 return err;
4023 }
4024
4025 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4026 {
4027 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4028 struct nlattr *nl_reg_rule;
4029 char *alpha2 = NULL;
4030 int rem_reg_rules = 0, r = 0;
4031 u32 num_rules = 0, rule_idx = 0, size_of_regd;
4032 u8 dfs_region = 0;
4033 struct ieee80211_regdomain *rd = NULL;
4034
4035 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4036 return -EINVAL;
4037
4038 if (!info->attrs[NL80211_ATTR_REG_RULES])
4039 return -EINVAL;
4040
4041 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4042
4043 if (info->attrs[NL80211_ATTR_DFS_REGION])
4044 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4045
4046 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4047 rem_reg_rules) {
4048 num_rules++;
4049 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4050 return -EINVAL;
4051 }
4052
4053 mutex_lock(&cfg80211_mutex);
4054
4055 if (!reg_is_valid_request(alpha2)) {
4056 r = -EINVAL;
4057 goto bad_reg;
4058 }
4059
4060 size_of_regd = sizeof(struct ieee80211_regdomain) +
4061 (num_rules * sizeof(struct ieee80211_reg_rule));
4062
4063 rd = kzalloc(size_of_regd, GFP_KERNEL);
4064 if (!rd) {
4065 r = -ENOMEM;
4066 goto bad_reg;
4067 }
4068
4069 rd->n_reg_rules = num_rules;
4070 rd->alpha2[0] = alpha2[0];
4071 rd->alpha2[1] = alpha2[1];
4072
4073 /*
4074 * Disable DFS master mode if the DFS region was
4075 * not supported or known on this kernel.
4076 */
4077 if (reg_supported_dfs_region(dfs_region))
4078 rd->dfs_region = dfs_region;
4079
4080 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4081 rem_reg_rules) {
4082 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4083 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4084 reg_rule_policy);
4085 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4086 if (r)
4087 goto bad_reg;
4088
4089 rule_idx++;
4090
4091 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4092 r = -EINVAL;
4093 goto bad_reg;
4094 }
4095 }
4096
4097 BUG_ON(rule_idx != num_rules);
4098
4099 r = set_regdom(rd);
4100
4101 mutex_unlock(&cfg80211_mutex);
4102
4103 return r;
4104
4105 bad_reg:
4106 mutex_unlock(&cfg80211_mutex);
4107 kfree(rd);
4108 return r;
4109 }
4110
4111 static int validate_scan_freqs(struct nlattr *freqs)
4112 {
4113 struct nlattr *attr1, *attr2;
4114 int n_channels = 0, tmp1, tmp2;
4115
4116 nla_for_each_nested(attr1, freqs, tmp1) {
4117 n_channels++;
4118 /*
4119 * Some hardware has a limited channel list for
4120 * scanning, and it is pretty much nonsensical
4121 * to scan for a channel twice, so disallow that
4122 * and don't require drivers to check that the
4123 * channel list they get isn't longer than what
4124 * they can scan, as long as they can scan all
4125 * the channels they registered at once.
4126 */
4127 nla_for_each_nested(attr2, freqs, tmp2)
4128 if (attr1 != attr2 &&
4129 nla_get_u32(attr1) == nla_get_u32(attr2))
4130 return 0;
4131 }
4132
4133 return n_channels;
4134 }
4135
4136 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4137 {
4138 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4139 struct wireless_dev *wdev = info->user_ptr[1];
4140 struct cfg80211_scan_request *request;
4141 struct nlattr *attr;
4142 struct wiphy *wiphy;
4143 int err, tmp, n_ssids = 0, n_channels, i;
4144 size_t ie_len;
4145
4146 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4147 return -EINVAL;
4148
4149 wiphy = &rdev->wiphy;
4150
4151 if (!rdev->ops->scan)
4152 return -EOPNOTSUPP;
4153
4154 if (rdev->scan_req)
4155 return -EBUSY;
4156
4157 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4158 n_channels = validate_scan_freqs(
4159 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4160 if (!n_channels)
4161 return -EINVAL;
4162 } else {
4163 enum ieee80211_band band;
4164 n_channels = 0;
4165
4166 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4167 if (wiphy->bands[band])
4168 n_channels += wiphy->bands[band]->n_channels;
4169 }
4170
4171 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4172 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4173 n_ssids++;
4174
4175 if (n_ssids > wiphy->max_scan_ssids)
4176 return -EINVAL;
4177
4178 if (info->attrs[NL80211_ATTR_IE])
4179 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4180 else
4181 ie_len = 0;
4182
4183 if (ie_len > wiphy->max_scan_ie_len)
4184 return -EINVAL;
4185
4186 request = kzalloc(sizeof(*request)
4187 + sizeof(*request->ssids) * n_ssids
4188 + sizeof(*request->channels) * n_channels
4189 + ie_len, GFP_KERNEL);
4190 if (!request)
4191 return -ENOMEM;
4192
4193 if (n_ssids)
4194 request->ssids = (void *)&request->channels[n_channels];
4195 request->n_ssids = n_ssids;
4196 if (ie_len) {
4197 if (request->ssids)
4198 request->ie = (void *)(request->ssids + n_ssids);
4199 else
4200 request->ie = (void *)(request->channels + n_channels);
4201 }
4202
4203 i = 0;
4204 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4205 /* user specified, bail out if channel not found */
4206 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4207 struct ieee80211_channel *chan;
4208
4209 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4210
4211 if (!chan) {
4212 err = -EINVAL;
4213 goto out_free;
4214 }
4215
4216 /* ignore disabled channels */
4217 if (chan->flags & IEEE80211_CHAN_DISABLED)
4218 continue;
4219
4220 request->channels[i] = chan;
4221 i++;
4222 }
4223 } else {
4224 enum ieee80211_band band;
4225
4226 /* all channels */
4227 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4228 int j;
4229 if (!wiphy->bands[band])
4230 continue;
4231 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4232 struct ieee80211_channel *chan;
4233
4234 chan = &wiphy->bands[band]->channels[j];
4235
4236 if (chan->flags & IEEE80211_CHAN_DISABLED)
4237 continue;
4238
4239 request->channels[i] = chan;
4240 i++;
4241 }
4242 }
4243 }
4244
4245 if (!i) {
4246 err = -EINVAL;
4247 goto out_free;
4248 }
4249
4250 request->n_channels = i;
4251
4252 i = 0;
4253 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4254 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4255 if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4256 err = -EINVAL;
4257 goto out_free;
4258 }
4259 request->ssids[i].ssid_len = nla_len(attr);
4260 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4261 i++;
4262 }
4263 }
4264
4265 if (info->attrs[NL80211_ATTR_IE]) {
4266 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4267 memcpy((void *)request->ie,
4268 nla_data(info->attrs[NL80211_ATTR_IE]),
4269 request->ie_len);
4270 }
4271
4272 for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4273 if (wiphy->bands[i])
4274 request->rates[i] =
4275 (1 << wiphy->bands[i]->n_bitrates) - 1;
4276
4277 if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4278 nla_for_each_nested(attr,
4279 info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4280 tmp) {
4281 enum ieee80211_band band = nla_type(attr);
4282
4283 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4284 err = -EINVAL;
4285 goto out_free;
4286 }
4287 err = ieee80211_get_ratemask(wiphy->bands[band],
4288 nla_data(attr),
4289 nla_len(attr),
4290 &request->rates[band]);
4291 if (err)
4292 goto out_free;
4293 }
4294 }
4295
4296 request->no_cck =
4297 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4298
4299 request->wdev = wdev;
4300 request->wiphy = &rdev->wiphy;
4301
4302 rdev->scan_req = request;
4303 err = rdev->ops->scan(&rdev->wiphy, request);
4304
4305 if (!err) {
4306 nl80211_send_scan_start(rdev, wdev);
4307 if (wdev->netdev)
4308 dev_hold(wdev->netdev);
4309 } else {
4310 out_free:
4311 rdev->scan_req = NULL;
4312 kfree(request);
4313 }
4314
4315 return err;
4316 }
4317
4318 static int nl80211_start_sched_scan(struct sk_buff *skb,
4319 struct genl_info *info)
4320 {
4321 struct cfg80211_sched_scan_request *request;
4322 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4323 struct net_device *dev = info->user_ptr[1];
4324 struct nlattr *attr;
4325 struct wiphy *wiphy;
4326 int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4327 u32 interval;
4328 enum ieee80211_band band;
4329 size_t ie_len;
4330 struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4331
4332 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4333 !rdev->ops->sched_scan_start)
4334 return -EOPNOTSUPP;
4335
4336 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4337 return -EINVAL;
4338
4339 if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4340 return -EINVAL;
4341
4342 interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4343 if (interval == 0)
4344 return -EINVAL;
4345
4346 wiphy = &rdev->wiphy;
4347
4348 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4349 n_channels = validate_scan_freqs(
4350 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4351 if (!n_channels)
4352 return -EINVAL;
4353 } else {
4354 n_channels = 0;
4355
4356 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4357 if (wiphy->bands[band])
4358 n_channels += wiphy->bands[band]->n_channels;
4359 }
4360
4361 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4362 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4363 tmp)
4364 n_ssids++;
4365
4366 if (n_ssids > wiphy->max_sched_scan_ssids)
4367 return -EINVAL;
4368
4369 if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4370 nla_for_each_nested(attr,
4371 info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4372 tmp)
4373 n_match_sets++;
4374
4375 if (n_match_sets > wiphy->max_match_sets)
4376 return -EINVAL;
4377
4378 if (info->attrs[NL80211_ATTR_IE])
4379 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4380 else
4381 ie_len = 0;
4382
4383 if (ie_len > wiphy->max_sched_scan_ie_len)
4384 return -EINVAL;
4385
4386 mutex_lock(&rdev->sched_scan_mtx);
4387
4388 if (rdev->sched_scan_req) {
4389 err = -EINPROGRESS;
4390 goto out;
4391 }
4392
4393 request = kzalloc(sizeof(*request)
4394 + sizeof(*request->ssids) * n_ssids
4395 + sizeof(*request->match_sets) * n_match_sets
4396 + sizeof(*request->channels) * n_channels
4397 + ie_len, GFP_KERNEL);
4398 if (!request) {
4399 err = -ENOMEM;
4400 goto out;
4401 }
4402
4403 if (n_ssids)
4404 request->ssids = (void *)&request->channels[n_channels];
4405 request->n_ssids = n_ssids;
4406 if (ie_len) {
4407 if (request->ssids)
4408 request->ie = (void *)(request->ssids + n_ssids);
4409 else
4410 request->ie = (void *)(request->channels + n_channels);
4411 }
4412
4413 if (n_match_sets) {
4414 if (request->ie)
4415 request->match_sets = (void *)(request->ie + ie_len);
4416 else if (request->ssids)
4417 request->match_sets =
4418 (void *)(request->ssids + n_ssids);
4419 else
4420 request->match_sets =
4421 (void *)(request->channels + n_channels);
4422 }
4423 request->n_match_sets = n_match_sets;
4424
4425 i = 0;
4426 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4427 /* user specified, bail out if channel not found */
4428 nla_for_each_nested(attr,
4429 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4430 tmp) {
4431 struct ieee80211_channel *chan;
4432
4433 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4434
4435 if (!chan) {
4436 err = -EINVAL;
4437 goto out_free;
4438 }
4439
4440 /* ignore disabled channels */
4441 if (chan->flags & IEEE80211_CHAN_DISABLED)
4442 continue;
4443
4444 request->channels[i] = chan;
4445 i++;
4446 }
4447 } else {
4448 /* all channels */
4449 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4450 int j;
4451 if (!wiphy->bands[band])
4452 continue;
4453 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4454 struct ieee80211_channel *chan;
4455
4456 chan = &wiphy->bands[band]->channels[j];
4457
4458 if (chan->flags & IEEE80211_CHAN_DISABLED)
4459 continue;
4460
4461 request->channels[i] = chan;
4462 i++;
4463 }
4464 }
4465 }
4466
4467 if (!i) {
4468 err = -EINVAL;
4469 goto out_free;
4470 }
4471
4472 request->n_channels = i;
4473
4474 i = 0;
4475 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4476 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4477 tmp) {
4478 if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4479 err = -EINVAL;
4480 goto out_free;
4481 }
4482 request->ssids[i].ssid_len = nla_len(attr);
4483 memcpy(request->ssids[i].ssid, nla_data(attr),
4484 nla_len(attr));
4485 i++;
4486 }
4487 }
4488
4489 i = 0;
4490 if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4491 nla_for_each_nested(attr,
4492 info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4493 tmp) {
4494 struct nlattr *ssid, *rssi;
4495
4496 nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4497 nla_data(attr), nla_len(attr),
4498 nl80211_match_policy);
4499 ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4500 if (ssid) {
4501 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4502 err = -EINVAL;
4503 goto out_free;
4504 }
4505 memcpy(request->match_sets[i].ssid.ssid,
4506 nla_data(ssid), nla_len(ssid));
4507 request->match_sets[i].ssid.ssid_len =
4508 nla_len(ssid);
4509 }
4510 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4511 if (rssi)
4512 request->rssi_thold = nla_get_u32(rssi);
4513 else
4514 request->rssi_thold =
4515 NL80211_SCAN_RSSI_THOLD_OFF;
4516 i++;
4517 }
4518 }
4519
4520 if (info->attrs[NL80211_ATTR_IE]) {
4521 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4522 memcpy((void *)request->ie,
4523 nla_data(info->attrs[NL80211_ATTR_IE]),
4524 request->ie_len);
4525 }
4526
4527 request->dev = dev;
4528 request->wiphy = &rdev->wiphy;
4529 request->interval = interval;
4530
4531 err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4532 if (!err) {
4533 rdev->sched_scan_req = request;
4534 nl80211_send_sched_scan(rdev, dev,
4535 NL80211_CMD_START_SCHED_SCAN);
4536 goto out;
4537 }
4538
4539 out_free:
4540 kfree(request);
4541 out:
4542 mutex_unlock(&rdev->sched_scan_mtx);
4543 return err;
4544 }
4545
4546 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4547 struct genl_info *info)
4548 {
4549 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4550 int err;
4551
4552 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4553 !rdev->ops->sched_scan_stop)
4554 return -EOPNOTSUPP;
4555
4556 mutex_lock(&rdev->sched_scan_mtx);
4557 err = __cfg80211_stop_sched_scan(rdev, false);
4558 mutex_unlock(&rdev->sched_scan_mtx);
4559
4560 return err;
4561 }
4562
4563 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4564 u32 seq, int flags,
4565 struct cfg80211_registered_device *rdev,
4566 struct wireless_dev *wdev,
4567 struct cfg80211_internal_bss *intbss)
4568 {
4569 struct cfg80211_bss *res = &intbss->pub;
4570 void *hdr;
4571 struct nlattr *bss;
4572
4573 ASSERT_WDEV_LOCK(wdev);
4574
4575 hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4576 NL80211_CMD_NEW_SCAN_RESULTS);
4577 if (!hdr)
4578 return -1;
4579
4580 genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4581
4582 if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4583 nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4584 goto nla_put_failure;
4585
4586 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4587 if (!bss)
4588 goto nla_put_failure;
4589 if ((!is_zero_ether_addr(res->bssid) &&
4590 nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4591 (res->information_elements && res->len_information_elements &&
4592 nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4593 res->len_information_elements,
4594 res->information_elements)) ||
4595 (res->beacon_ies && res->len_beacon_ies &&
4596 res->beacon_ies != res->information_elements &&
4597 nla_put(msg, NL80211_BSS_BEACON_IES,
4598 res->len_beacon_ies, res->beacon_ies)))
4599 goto nla_put_failure;
4600 if (res->tsf &&
4601 nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4602 goto nla_put_failure;
4603 if (res->beacon_interval &&
4604 nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4605 goto nla_put_failure;
4606 if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4607 nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4608 nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4609 jiffies_to_msecs(jiffies - intbss->ts)))
4610 goto nla_put_failure;
4611
4612 switch (rdev->wiphy.signal_type) {
4613 case CFG80211_SIGNAL_TYPE_MBM:
4614 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4615 goto nla_put_failure;
4616 break;
4617 case CFG80211_SIGNAL_TYPE_UNSPEC:
4618 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4619 goto nla_put_failure;
4620 break;
4621 default:
4622 break;
4623 }
4624
4625 switch (wdev->iftype) {
4626 case NL80211_IFTYPE_P2P_CLIENT:
4627 case NL80211_IFTYPE_STATION:
4628 if (intbss == wdev->current_bss &&
4629 nla_put_u32(msg, NL80211_BSS_STATUS,
4630 NL80211_BSS_STATUS_ASSOCIATED))
4631 goto nla_put_failure;
4632 break;
4633 case NL80211_IFTYPE_ADHOC:
4634 if (intbss == wdev->current_bss &&
4635 nla_put_u32(msg, NL80211_BSS_STATUS,
4636 NL80211_BSS_STATUS_IBSS_JOINED))
4637 goto nla_put_failure;
4638 break;
4639 default:
4640 break;
4641 }
4642
4643 nla_nest_end(msg, bss);
4644
4645 return genlmsg_end(msg, hdr);
4646
4647 nla_put_failure:
4648 genlmsg_cancel(msg, hdr);
4649 return -EMSGSIZE;
4650 }
4651
4652 static int nl80211_dump_scan(struct sk_buff *skb,
4653 struct netlink_callback *cb)
4654 {
4655 struct cfg80211_registered_device *rdev;
4656 struct net_device *dev;
4657 struct cfg80211_internal_bss *scan;
4658 struct wireless_dev *wdev;
4659 int start = cb->args[1], idx = 0;
4660 int err;
4661
4662 err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4663 if (err)
4664 return err;
4665
4666 wdev = dev->ieee80211_ptr;
4667
4668 wdev_lock(wdev);
4669 spin_lock_bh(&rdev->bss_lock);
4670 cfg80211_bss_expire(rdev);
4671
4672 cb->seq = rdev->bss_generation;
4673
4674 list_for_each_entry(scan, &rdev->bss_list, list) {
4675 if (++idx <= start)
4676 continue;
4677 if (nl80211_send_bss(skb, cb,
4678 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4679 rdev, wdev, scan) < 0) {
4680 idx--;
4681 break;
4682 }
4683 }
4684
4685 spin_unlock_bh(&rdev->bss_lock);
4686 wdev_unlock(wdev);
4687
4688 cb->args[1] = idx;
4689 nl80211_finish_netdev_dump(rdev);
4690
4691 return skb->len;
4692 }
4693
4694 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4695 int flags, struct net_device *dev,
4696 struct survey_info *survey)
4697 {
4698 void *hdr;
4699 struct nlattr *infoattr;
4700
4701 hdr = nl80211hdr_put(msg, pid, seq, flags,
4702 NL80211_CMD_NEW_SURVEY_RESULTS);
4703 if (!hdr)
4704 return -ENOMEM;
4705
4706 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4707 goto nla_put_failure;
4708
4709 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4710 if (!infoattr)
4711 goto nla_put_failure;
4712
4713 if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4714 survey->channel->center_freq))
4715 goto nla_put_failure;
4716
4717 if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4718 nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4719 goto nla_put_failure;
4720 if ((survey->filled & SURVEY_INFO_IN_USE) &&
4721 nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4722 goto nla_put_failure;
4723 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4724 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4725 survey->channel_time))
4726 goto nla_put_failure;
4727 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4728 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4729 survey->channel_time_busy))
4730 goto nla_put_failure;
4731 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4732 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4733 survey->channel_time_ext_busy))
4734 goto nla_put_failure;
4735 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4736 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4737 survey->channel_time_rx))
4738 goto nla_put_failure;
4739 if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4740 nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4741 survey->channel_time_tx))
4742 goto nla_put_failure;
4743
4744 nla_nest_end(msg, infoattr);
4745
4746 return genlmsg_end(msg, hdr);
4747
4748 nla_put_failure:
4749 genlmsg_cancel(msg, hdr);
4750 return -EMSGSIZE;
4751 }
4752
4753 static int nl80211_dump_survey(struct sk_buff *skb,
4754 struct netlink_callback *cb)
4755 {
4756 struct survey_info survey;
4757 struct cfg80211_registered_device *dev;
4758 struct net_device *netdev;
4759 int survey_idx = cb->args[1];
4760 int res;
4761
4762 res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4763 if (res)
4764 return res;
4765
4766 if (!dev->ops->dump_survey) {
4767 res = -EOPNOTSUPP;
4768 goto out_err;
4769 }
4770
4771 while (1) {
4772 struct ieee80211_channel *chan;
4773
4774 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4775 &survey);
4776 if (res == -ENOENT)
4777 break;
4778 if (res)
4779 goto out_err;
4780
4781 /* Survey without a channel doesn't make sense */
4782 if (!survey.channel) {
4783 res = -EINVAL;
4784 goto out;
4785 }
4786
4787 chan = ieee80211_get_channel(&dev->wiphy,
4788 survey.channel->center_freq);
4789 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4790 survey_idx++;
4791 continue;
4792 }
4793
4794 if (nl80211_send_survey(skb,
4795 NETLINK_CB(cb->skb).pid,
4796 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4797 netdev,
4798 &survey) < 0)
4799 goto out;
4800 survey_idx++;
4801 }
4802
4803 out:
4804 cb->args[1] = survey_idx;
4805 res = skb->len;
4806 out_err:
4807 nl80211_finish_netdev_dump(dev);
4808 return res;
4809 }
4810
4811 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4812 {
4813 return auth_type <= NL80211_AUTHTYPE_MAX;
4814 }
4815
4816 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4817 {
4818 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4819 NL80211_WPA_VERSION_2));
4820 }
4821
4822 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4823 {
4824 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4825 struct net_device *dev = info->user_ptr[1];
4826 struct ieee80211_channel *chan;
4827 const u8 *bssid, *ssid, *ie = NULL;
4828 int err, ssid_len, ie_len = 0;
4829 enum nl80211_auth_type auth_type;
4830 struct key_parse key;
4831 bool local_state_change;
4832
4833 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4834 return -EINVAL;
4835
4836 if (!info->attrs[NL80211_ATTR_MAC])
4837 return -EINVAL;
4838
4839 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4840 return -EINVAL;
4841
4842 if (!info->attrs[NL80211_ATTR_SSID])
4843 return -EINVAL;
4844
4845 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4846 return -EINVAL;
4847
4848 err = nl80211_parse_key(info, &key);
4849 if (err)
4850 return err;
4851
4852 if (key.idx >= 0) {
4853 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4854 return -EINVAL;
4855 if (!key.p.key || !key.p.key_len)
4856 return -EINVAL;
4857 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4858 key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4859 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4860 key.p.key_len != WLAN_KEY_LEN_WEP104))
4861 return -EINVAL;
4862 if (key.idx > 4)
4863 return -EINVAL;
4864 } else {
4865 key.p.key_len = 0;
4866 key.p.key = NULL;
4867 }
4868
4869 if (key.idx >= 0) {
4870 int i;
4871 bool ok = false;
4872 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4873 if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4874 ok = true;
4875 break;
4876 }
4877 }
4878 if (!ok)
4879 return -EINVAL;
4880 }
4881
4882 if (!rdev->ops->auth)
4883 return -EOPNOTSUPP;
4884
4885 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4886 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4887 return -EOPNOTSUPP;
4888
4889 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4890 chan = ieee80211_get_channel(&rdev->wiphy,
4891 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4892 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4893 return -EINVAL;
4894
4895 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4896 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4897
4898 if (info->attrs[NL80211_ATTR_IE]) {
4899 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4900 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4901 }
4902
4903 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4904 if (!nl80211_valid_auth_type(auth_type))
4905 return -EINVAL;
4906
4907 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4908
4909 /*
4910 * Since we no longer track auth state, ignore
4911 * requests to only change local state.
4912 */
4913 if (local_state_change)
4914 return 0;
4915
4916 return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4917 ssid, ssid_len, ie, ie_len,
4918 key.p.key, key.p.key_len, key.idx);
4919 }
4920
4921 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4922 struct genl_info *info,
4923 struct cfg80211_crypto_settings *settings,
4924 int cipher_limit)
4925 {
4926 memset(settings, 0, sizeof(*settings));
4927
4928 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4929
4930 if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4931 u16 proto;
4932 proto = nla_get_u16(
4933 info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4934 settings->control_port_ethertype = cpu_to_be16(proto);
4935 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4936 proto != ETH_P_PAE)
4937 return -EINVAL;
4938 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4939 settings->control_port_no_encrypt = true;
4940 } else
4941 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4942
4943 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4944 void *data;
4945 int len, i;
4946
4947 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4948 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4949 settings->n_ciphers_pairwise = len / sizeof(u32);
4950
4951 if (len % sizeof(u32))
4952 return -EINVAL;
4953
4954 if (settings->n_ciphers_pairwise > cipher_limit)
4955 return -EINVAL;
4956
4957 memcpy(settings->ciphers_pairwise, data, len);
4958
4959 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4960 if (!cfg80211_supported_cipher_suite(
4961 &rdev->wiphy,
4962 settings->ciphers_pairwise[i]))
4963 return -EINVAL;
4964 }
4965
4966 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4967 settings->cipher_group =
4968 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4969 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4970 settings->cipher_group))
4971 return -EINVAL;
4972 }
4973
4974 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4975 settings->wpa_versions =
4976 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4977 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4978 return -EINVAL;
4979 }
4980
4981 if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4982 void *data;
4983 int len;
4984
4985 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4986 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4987 settings->n_akm_suites = len / sizeof(u32);
4988
4989 if (len % sizeof(u32))
4990 return -EINVAL;
4991
4992 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4993 return -EINVAL;
4994
4995 memcpy(settings->akm_suites, data, len);
4996 }
4997
4998 return 0;
4999 }
5000
5001 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5002 {
5003 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5004 struct net_device *dev = info->user_ptr[1];
5005 struct cfg80211_crypto_settings crypto;
5006 struct ieee80211_channel *chan;
5007 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5008 int err, ssid_len, ie_len = 0;
5009 bool use_mfp = false;
5010 u32 flags = 0;
5011 struct ieee80211_ht_cap *ht_capa = NULL;
5012 struct ieee80211_ht_cap *ht_capa_mask = NULL;
5013
5014 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5015 return -EINVAL;
5016
5017 if (!info->attrs[NL80211_ATTR_MAC] ||
5018 !info->attrs[NL80211_ATTR_SSID] ||
5019 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5020 return -EINVAL;
5021
5022 if (!rdev->ops->assoc)
5023 return -EOPNOTSUPP;
5024
5025 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5026 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5027 return -EOPNOTSUPP;
5028
5029 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5030
5031 chan = ieee80211_get_channel(&rdev->wiphy,
5032 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5033 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5034 return -EINVAL;
5035
5036 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5037 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5038
5039 if (info->attrs[NL80211_ATTR_IE]) {
5040 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5041 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5042 }
5043
5044 if (info->attrs[NL80211_ATTR_USE_MFP]) {
5045 enum nl80211_mfp mfp =
5046 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5047 if (mfp == NL80211_MFP_REQUIRED)
5048 use_mfp = true;
5049 else if (mfp != NL80211_MFP_NO)
5050 return -EINVAL;
5051 }
5052
5053 if (info->attrs[NL80211_ATTR_PREV_BSSID])
5054 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5055
5056 if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5057 flags |= ASSOC_REQ_DISABLE_HT;
5058
5059 if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5060 ht_capa_mask =
5061 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5062
5063 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5064 if (!ht_capa_mask)
5065 return -EINVAL;
5066 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5067 }
5068
5069 err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5070 if (!err)
5071 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5072 ssid, ssid_len, ie, ie_len, use_mfp,
5073 &crypto, flags, ht_capa,
5074 ht_capa_mask);
5075
5076 return err;
5077 }
5078
5079 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5080 {
5081 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5082 struct net_device *dev = info->user_ptr[1];
5083 const u8 *ie = NULL, *bssid;
5084 int ie_len = 0;
5085 u16 reason_code;
5086 bool local_state_change;
5087
5088 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5089 return -EINVAL;
5090
5091 if (!info->attrs[NL80211_ATTR_MAC])
5092 return -EINVAL;
5093
5094 if (!info->attrs[NL80211_ATTR_REASON_CODE])
5095 return -EINVAL;
5096
5097 if (!rdev->ops->deauth)
5098 return -EOPNOTSUPP;
5099
5100 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5101 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5102 return -EOPNOTSUPP;
5103
5104 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5105
5106 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5107 if (reason_code == 0) {
5108 /* Reason Code 0 is reserved */
5109 return -EINVAL;
5110 }
5111
5112 if (info->attrs[NL80211_ATTR_IE]) {
5113 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5114 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5115 }
5116
5117 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5118
5119 return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5120 local_state_change);
5121 }
5122
5123 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5124 {
5125 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5126 struct net_device *dev = info->user_ptr[1];
5127 const u8 *ie = NULL, *bssid;
5128 int ie_len = 0;
5129 u16 reason_code;
5130 bool local_state_change;
5131
5132 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5133 return -EINVAL;
5134
5135 if (!info->attrs[NL80211_ATTR_MAC])
5136 return -EINVAL;
5137
5138 if (!info->attrs[NL80211_ATTR_REASON_CODE])
5139 return -EINVAL;
5140
5141 if (!rdev->ops->disassoc)
5142 return -EOPNOTSUPP;
5143
5144 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5145 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5146 return -EOPNOTSUPP;
5147
5148 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5149
5150 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5151 if (reason_code == 0) {
5152 /* Reason Code 0 is reserved */
5153 return -EINVAL;
5154 }
5155
5156 if (info->attrs[NL80211_ATTR_IE]) {
5157 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5158 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5159 }
5160
5161 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5162
5163 return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5164 local_state_change);
5165 }
5166
5167 static bool
5168 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5169 int mcast_rate[IEEE80211_NUM_BANDS],
5170 int rateval)
5171 {
5172 struct wiphy *wiphy = &rdev->wiphy;
5173 bool found = false;
5174 int band, i;
5175
5176 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5177 struct ieee80211_supported_band *sband;
5178
5179 sband = wiphy->bands[band];
5180 if (!sband)
5181 continue;
5182
5183 for (i = 0; i < sband->n_bitrates; i++) {
5184 if (sband->bitrates[i].bitrate == rateval) {
5185 mcast_rate[band] = i + 1;
5186 found = true;
5187 break;
5188 }
5189 }
5190 }
5191
5192 return found;
5193 }
5194
5195 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5196 {
5197 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5198 struct net_device *dev = info->user_ptr[1];
5199 struct cfg80211_ibss_params ibss;
5200 struct wiphy *wiphy;
5201 struct cfg80211_cached_keys *connkeys = NULL;
5202 int err;
5203
5204 memset(&ibss, 0, sizeof(ibss));
5205
5206 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5207 return -EINVAL;
5208
5209 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5210 !info->attrs[NL80211_ATTR_SSID] ||
5211 !nla_len(info->attrs[NL80211_ATTR_SSID]))
5212 return -EINVAL;
5213
5214 ibss.beacon_interval = 100;
5215
5216 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5217 ibss.beacon_interval =
5218 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5219 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5220 return -EINVAL;
5221 }
5222
5223 if (!rdev->ops->join_ibss)
5224 return -EOPNOTSUPP;
5225
5226 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5227 return -EOPNOTSUPP;
5228
5229 wiphy = &rdev->wiphy;
5230
5231 if (info->attrs[NL80211_ATTR_MAC]) {
5232 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5233
5234 if (!is_valid_ether_addr(ibss.bssid))
5235 return -EINVAL;
5236 }
5237 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5238 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5239
5240 if (info->attrs[NL80211_ATTR_IE]) {
5241 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5242 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5243 }
5244
5245 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5246 enum nl80211_channel_type channel_type;
5247
5248 if (!nl80211_valid_channel_type(info, &channel_type))
5249 return -EINVAL;
5250
5251 if (channel_type != NL80211_CHAN_NO_HT &&
5252 !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5253 return -EINVAL;
5254
5255 ibss.channel_type = channel_type;
5256 } else {
5257 ibss.channel_type = NL80211_CHAN_NO_HT;
5258 }
5259
5260 ibss.channel = rdev_freq_to_chan(rdev,
5261 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5262 ibss.channel_type);
5263 if (!ibss.channel ||
5264 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5265 ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5266 return -EINVAL;
5267
5268 /* Both channels should be able to initiate communication */
5269 if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5270 ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5271 !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5272 ibss.channel_type))
5273 return -EINVAL;
5274
5275 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5276 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5277
5278 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5279 u8 *rates =
5280 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5281 int n_rates =
5282 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5283 struct ieee80211_supported_band *sband =
5284 wiphy->bands[ibss.channel->band];
5285
5286 err = ieee80211_get_ratemask(sband, rates, n_rates,
5287 &ibss.basic_rates);
5288 if (err)
5289 return err;
5290 }
5291
5292 if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5293 !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5294 nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5295 return -EINVAL;
5296
5297 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5298 connkeys = nl80211_parse_connkeys(rdev,
5299 info->attrs[NL80211_ATTR_KEYS]);
5300 if (IS_ERR(connkeys))
5301 return PTR_ERR(connkeys);
5302 }
5303
5304 ibss.control_port =
5305 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5306
5307 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5308 if (err)
5309 kfree(connkeys);
5310 return err;
5311 }
5312
5313 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5314 {
5315 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5316 struct net_device *dev = info->user_ptr[1];
5317
5318 if (!rdev->ops->leave_ibss)
5319 return -EOPNOTSUPP;
5320
5321 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5322 return -EOPNOTSUPP;
5323
5324 return cfg80211_leave_ibss(rdev, dev, false);
5325 }
5326
5327 #ifdef CONFIG_NL80211_TESTMODE
5328 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5329 .name = "testmode",
5330 };
5331
5332 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5333 {
5334 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5335 int err;
5336
5337 if (!info->attrs[NL80211_ATTR_TESTDATA])
5338 return -EINVAL;
5339
5340 err = -EOPNOTSUPP;
5341 if (rdev->ops->testmode_cmd) {
5342 rdev->testmode_info = info;
5343 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5344 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5345 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5346 rdev->testmode_info = NULL;
5347 }
5348
5349 return err;
5350 }
5351
5352 static int nl80211_testmode_dump(struct sk_buff *skb,
5353 struct netlink_callback *cb)
5354 {
5355 struct cfg80211_registered_device *rdev;
5356 int err;
5357 long phy_idx;
5358 void *data = NULL;
5359 int data_len = 0;
5360
5361 if (cb->args[0]) {
5362 /*
5363 * 0 is a valid index, but not valid for args[0],
5364 * so we need to offset by 1.
5365 */
5366 phy_idx = cb->args[0] - 1;
5367 } else {
5368 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5369 nl80211_fam.attrbuf, nl80211_fam.maxattr,
5370 nl80211_policy);
5371 if (err)
5372 return err;
5373
5374 mutex_lock(&cfg80211_mutex);
5375 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5376 nl80211_fam.attrbuf);
5377 if (IS_ERR(rdev)) {
5378 mutex_unlock(&cfg80211_mutex);
5379 return PTR_ERR(rdev);
5380 }
5381 phy_idx = rdev->wiphy_idx;
5382 rdev = NULL;
5383 mutex_unlock(&cfg80211_mutex);
5384
5385 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5386 cb->args[1] =
5387 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5388 }
5389
5390 if (cb->args[1]) {
5391 data = nla_data((void *)cb->args[1]);
5392 data_len = nla_len((void *)cb->args[1]);
5393 }
5394
5395 mutex_lock(&cfg80211_mutex);
5396 rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5397 if (!rdev) {
5398 mutex_unlock(&cfg80211_mutex);
5399 return -ENOENT;
5400 }
5401 cfg80211_lock_rdev(rdev);
5402 mutex_unlock(&cfg80211_mutex);
5403
5404 if (!rdev->ops->testmode_dump) {
5405 err = -EOPNOTSUPP;
5406 goto out_err;
5407 }
5408
5409 while (1) {
5410 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5411 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5412 NL80211_CMD_TESTMODE);
5413 struct nlattr *tmdata;
5414
5415 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5416 genlmsg_cancel(skb, hdr);
5417 break;
5418 }
5419
5420 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5421 if (!tmdata) {
5422 genlmsg_cancel(skb, hdr);
5423 break;
5424 }
5425 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5426 data, data_len);
5427 nla_nest_end(skb, tmdata);
5428
5429 if (err == -ENOBUFS || err == -ENOENT) {
5430 genlmsg_cancel(skb, hdr);
5431 break;
5432 } else if (err) {
5433 genlmsg_cancel(skb, hdr);
5434 goto out_err;
5435 }
5436
5437 genlmsg_end(skb, hdr);
5438 }
5439
5440 err = skb->len;
5441 /* see above */
5442 cb->args[0] = phy_idx + 1;
5443 out_err:
5444 cfg80211_unlock_rdev(rdev);
5445 return err;
5446 }
5447
5448 static struct sk_buff *
5449 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5450 int approxlen, u32 pid, u32 seq, gfp_t gfp)
5451 {
5452 struct sk_buff *skb;
5453 void *hdr;
5454 struct nlattr *data;
5455
5456 skb = nlmsg_new(approxlen + 100, gfp);
5457 if (!skb)
5458 return NULL;
5459
5460 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5461 if (!hdr) {
5462 kfree_skb(skb);
5463 return NULL;
5464 }
5465
5466 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5467 goto nla_put_failure;
5468 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5469
5470 ((void **)skb->cb)[0] = rdev;
5471 ((void **)skb->cb)[1] = hdr;
5472 ((void **)skb->cb)[2] = data;
5473
5474 return skb;
5475
5476 nla_put_failure:
5477 kfree_skb(skb);
5478 return NULL;
5479 }
5480
5481 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5482 int approxlen)
5483 {
5484 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5485
5486 if (WARN_ON(!rdev->testmode_info))
5487 return NULL;
5488
5489 return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5490 rdev->testmode_info->snd_pid,
5491 rdev->testmode_info->snd_seq,
5492 GFP_KERNEL);
5493 }
5494 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5495
5496 int cfg80211_testmode_reply(struct sk_buff *skb)
5497 {
5498 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5499 void *hdr = ((void **)skb->cb)[1];
5500 struct nlattr *data = ((void **)skb->cb)[2];
5501
5502 if (WARN_ON(!rdev->testmode_info)) {
5503 kfree_skb(skb);
5504 return -EINVAL;
5505 }
5506
5507 nla_nest_end(skb, data);
5508 genlmsg_end(skb, hdr);
5509 return genlmsg_reply(skb, rdev->testmode_info);
5510 }
5511 EXPORT_SYMBOL(cfg80211_testmode_reply);
5512
5513 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5514 int approxlen, gfp_t gfp)
5515 {
5516 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5517
5518 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5519 }
5520 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5521
5522 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5523 {
5524 void *hdr = ((void **)skb->cb)[1];
5525 struct nlattr *data = ((void **)skb->cb)[2];
5526
5527 nla_nest_end(skb, data);
5528 genlmsg_end(skb, hdr);
5529 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5530 }
5531 EXPORT_SYMBOL(cfg80211_testmode_event);
5532 #endif
5533
5534 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5535 {
5536 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5537 struct net_device *dev = info->user_ptr[1];
5538 struct cfg80211_connect_params connect;
5539 struct wiphy *wiphy;
5540 struct cfg80211_cached_keys *connkeys = NULL;
5541 int err;
5542
5543 memset(&connect, 0, sizeof(connect));
5544
5545 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5546 return -EINVAL;
5547
5548 if (!info->attrs[NL80211_ATTR_SSID] ||
5549 !nla_len(info->attrs[NL80211_ATTR_SSID]))
5550 return -EINVAL;
5551
5552 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5553 connect.auth_type =
5554 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5555 if (!nl80211_valid_auth_type(connect.auth_type))
5556 return -EINVAL;
5557 } else
5558 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5559
5560 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5561
5562 err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5563 NL80211_MAX_NR_CIPHER_SUITES);
5564 if (err)
5565 return err;
5566
5567 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5568 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5569 return -EOPNOTSUPP;
5570
5571 wiphy = &rdev->wiphy;
5572
5573 connect.bg_scan_period = -1;
5574 if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5575 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5576 connect.bg_scan_period =
5577 nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5578 }
5579
5580 if (info->attrs[NL80211_ATTR_MAC])
5581 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5582 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5583 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5584
5585 if (info->attrs[NL80211_ATTR_IE]) {
5586 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5587 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5588 }
5589
5590 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5591 connect.channel =
5592 ieee80211_get_channel(wiphy,
5593 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5594 if (!connect.channel ||
5595 connect.channel->flags & IEEE80211_CHAN_DISABLED)
5596 return -EINVAL;
5597 }
5598
5599 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5600 connkeys = nl80211_parse_connkeys(rdev,
5601 info->attrs[NL80211_ATTR_KEYS]);
5602 if (IS_ERR(connkeys))
5603 return PTR_ERR(connkeys);
5604 }
5605
5606 if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5607 connect.flags |= ASSOC_REQ_DISABLE_HT;
5608
5609 if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5610 memcpy(&connect.ht_capa_mask,
5611 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5612 sizeof(connect.ht_capa_mask));
5613
5614 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5615 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5616 return -EINVAL;
5617 memcpy(&connect.ht_capa,
5618 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5619 sizeof(connect.ht_capa));
5620 }
5621
5622 err = cfg80211_connect(rdev, dev, &connect, connkeys);
5623 if (err)
5624 kfree(connkeys);
5625 return err;
5626 }
5627
5628 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5629 {
5630 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5631 struct net_device *dev = info->user_ptr[1];
5632 u16 reason;
5633
5634 if (!info->attrs[NL80211_ATTR_REASON_CODE])
5635 reason = WLAN_REASON_DEAUTH_LEAVING;
5636 else
5637 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5638
5639 if (reason == 0)
5640 return -EINVAL;
5641
5642 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5643 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5644 return -EOPNOTSUPP;
5645
5646 return cfg80211_disconnect(rdev, dev, reason, true);
5647 }
5648
5649 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5650 {
5651 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5652 struct net *net;
5653 int err;
5654 u32 pid;
5655
5656 if (!info->attrs[NL80211_ATTR_PID])
5657 return -EINVAL;
5658
5659 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5660
5661 net = get_net_ns_by_pid(pid);
5662 if (IS_ERR(net))
5663 return PTR_ERR(net);
5664
5665 err = 0;
5666
5667 /* check if anything to do */
5668 if (!net_eq(wiphy_net(&rdev->wiphy), net))
5669 err = cfg80211_switch_netns(rdev, net);
5670
5671 put_net(net);
5672 return err;
5673 }
5674
5675 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5676 {
5677 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5678 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5679 struct cfg80211_pmksa *pmksa) = NULL;
5680 struct net_device *dev = info->user_ptr[1];
5681 struct cfg80211_pmksa pmksa;
5682
5683 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5684
5685 if (!info->attrs[NL80211_ATTR_MAC])
5686 return -EINVAL;
5687
5688 if (!info->attrs[NL80211_ATTR_PMKID])
5689 return -EINVAL;
5690
5691 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5692 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5693
5694 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5695 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5696 return -EOPNOTSUPP;
5697
5698 switch (info->genlhdr->cmd) {
5699 case NL80211_CMD_SET_PMKSA:
5700 rdev_ops = rdev->ops->set_pmksa;
5701 break;
5702 case NL80211_CMD_DEL_PMKSA:
5703 rdev_ops = rdev->ops->del_pmksa;
5704 break;
5705 default:
5706 WARN_ON(1);
5707 break;
5708 }
5709
5710 if (!rdev_ops)
5711 return -EOPNOTSUPP;
5712
5713 return rdev_ops(&rdev->wiphy, dev, &pmksa);
5714 }
5715
5716 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5717 {
5718 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5719 struct net_device *dev = info->user_ptr[1];
5720
5721 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5722 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5723 return -EOPNOTSUPP;
5724
5725 if (!rdev->ops->flush_pmksa)
5726 return -EOPNOTSUPP;
5727
5728 return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5729 }
5730
5731 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5732 {
5733 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5734 struct net_device *dev = info->user_ptr[1];
5735 u8 action_code, dialog_token;
5736 u16 status_code;
5737 u8 *peer;
5738
5739 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5740 !rdev->ops->tdls_mgmt)
5741 return -EOPNOTSUPP;
5742
5743 if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5744 !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5745 !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5746 !info->attrs[NL80211_ATTR_IE] ||
5747 !info->attrs[NL80211_ATTR_MAC])
5748 return -EINVAL;
5749
5750 peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5751 action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5752 status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5753 dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5754
5755 return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5756 dialog_token, status_code,
5757 nla_data(info->attrs[NL80211_ATTR_IE]),
5758 nla_len(info->attrs[NL80211_ATTR_IE]));
5759 }
5760
5761 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5762 {
5763 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5764 struct net_device *dev = info->user_ptr[1];
5765 enum nl80211_tdls_operation operation;
5766 u8 *peer;
5767
5768 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5769 !rdev->ops->tdls_oper)
5770 return -EOPNOTSUPP;
5771
5772 if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5773 !info->attrs[NL80211_ATTR_MAC])
5774 return -EINVAL;
5775
5776 operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5777 peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5778
5779 return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5780 }
5781
5782 static int nl80211_remain_on_channel(struct sk_buff *skb,
5783 struct genl_info *info)
5784 {
5785 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5786 struct wireless_dev *wdev = info->user_ptr[1];
5787 struct ieee80211_channel *chan;
5788 struct sk_buff *msg;
5789 void *hdr;
5790 u64 cookie;
5791 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5792 u32 freq, duration;
5793 int err;
5794
5795 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5796 !info->attrs[NL80211_ATTR_DURATION])
5797 return -EINVAL;
5798
5799 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5800
5801 if (!rdev->ops->remain_on_channel ||
5802 !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5803 return -EOPNOTSUPP;
5804
5805 /*
5806 * We should be on that channel for at least a minimum amount of
5807 * time (10ms) but no longer than the driver supports.
5808 */
5809 if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5810 duration > rdev->wiphy.max_remain_on_channel_duration)
5811 return -EINVAL;
5812
5813 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5814 !nl80211_valid_channel_type(info, &channel_type))
5815 return -EINVAL;
5816
5817 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5818 chan = rdev_freq_to_chan(rdev, freq, channel_type);
5819 if (chan == NULL)
5820 return -EINVAL;
5821
5822 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5823 if (!msg)
5824 return -ENOMEM;
5825
5826 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5827 NL80211_CMD_REMAIN_ON_CHANNEL);
5828
5829 if (IS_ERR(hdr)) {
5830 err = PTR_ERR(hdr);
5831 goto free_msg;
5832 }
5833
5834 err = rdev->ops->remain_on_channel(&rdev->wiphy, wdev, chan,
5835 channel_type, duration, &cookie);
5836
5837 if (err)
5838 goto free_msg;
5839
5840 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5841 goto nla_put_failure;
5842
5843 genlmsg_end(msg, hdr);
5844
5845 return genlmsg_reply(msg, info);
5846
5847 nla_put_failure:
5848 err = -ENOBUFS;
5849 free_msg:
5850 nlmsg_free(msg);
5851 return err;
5852 }
5853
5854 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5855 struct genl_info *info)
5856 {
5857 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5858 struct wireless_dev *wdev = info->user_ptr[1];
5859 u64 cookie;
5860
5861 if (!info->attrs[NL80211_ATTR_COOKIE])
5862 return -EINVAL;
5863
5864 if (!rdev->ops->cancel_remain_on_channel)
5865 return -EOPNOTSUPP;
5866
5867 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5868
5869 return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, wdev, cookie);
5870 }
5871
5872 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5873 u8 *rates, u8 rates_len)
5874 {
5875 u8 i;
5876 u32 mask = 0;
5877
5878 for (i = 0; i < rates_len; i++) {
5879 int rate = (rates[i] & 0x7f) * 5;
5880 int ridx;
5881 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5882 struct ieee80211_rate *srate =
5883 &sband->bitrates[ridx];
5884 if (rate == srate->bitrate) {
5885 mask |= 1 << ridx;
5886 break;
5887 }
5888 }
5889 if (ridx == sband->n_bitrates)
5890 return 0; /* rate not found */
5891 }
5892
5893 return mask;
5894 }
5895
5896 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5897 u8 *rates, u8 rates_len,
5898 u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5899 {
5900 u8 i;
5901
5902 memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5903
5904 for (i = 0; i < rates_len; i++) {
5905 int ridx, rbit;
5906
5907 ridx = rates[i] / 8;
5908 rbit = BIT(rates[i] % 8);
5909
5910 /* check validity */
5911 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5912 return false;
5913
5914 /* check availability */
5915 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5916 mcs[ridx] |= rbit;
5917 else
5918 return false;
5919 }
5920
5921 return true;
5922 }
5923
5924 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5925 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5926 .len = NL80211_MAX_SUPP_RATES },
5927 [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5928 .len = NL80211_MAX_SUPP_HT_RATES },
5929 };
5930
5931 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5932 struct genl_info *info)
5933 {
5934 struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5935 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5936 struct cfg80211_bitrate_mask mask;
5937 int rem, i;
5938 struct net_device *dev = info->user_ptr[1];
5939 struct nlattr *tx_rates;
5940 struct ieee80211_supported_band *sband;
5941
5942 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5943 return -EINVAL;
5944
5945 if (!rdev->ops->set_bitrate_mask)
5946 return -EOPNOTSUPP;
5947
5948 memset(&mask, 0, sizeof(mask));
5949 /* Default to all rates enabled */
5950 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5951 sband = rdev->wiphy.bands[i];
5952 mask.control[i].legacy =
5953 sband ? (1 << sband->n_bitrates) - 1 : 0;
5954 if (sband)
5955 memcpy(mask.control[i].mcs,
5956 sband->ht_cap.mcs.rx_mask,
5957 sizeof(mask.control[i].mcs));
5958 else
5959 memset(mask.control[i].mcs, 0,
5960 sizeof(mask.control[i].mcs));
5961 }
5962
5963 /*
5964 * The nested attribute uses enum nl80211_band as the index. This maps
5965 * directly to the enum ieee80211_band values used in cfg80211.
5966 */
5967 BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5968 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5969 {
5970 enum ieee80211_band band = nla_type(tx_rates);
5971 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5972 return -EINVAL;
5973 sband = rdev->wiphy.bands[band];
5974 if (sband == NULL)
5975 return -EINVAL;
5976 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5977 nla_len(tx_rates), nl80211_txattr_policy);
5978 if (tb[NL80211_TXRATE_LEGACY]) {
5979 mask.control[band].legacy = rateset_to_mask(
5980 sband,
5981 nla_data(tb[NL80211_TXRATE_LEGACY]),
5982 nla_len(tb[NL80211_TXRATE_LEGACY]));
5983 if ((mask.control[band].legacy == 0) &&
5984 nla_len(tb[NL80211_TXRATE_LEGACY]))
5985 return -EINVAL;
5986 }
5987 if (tb[NL80211_TXRATE_MCS]) {
5988 if (!ht_rateset_to_mask(
5989 sband,
5990 nla_data(tb[NL80211_TXRATE_MCS]),
5991 nla_len(tb[NL80211_TXRATE_MCS]),
5992 mask.control[band].mcs))
5993 return -EINVAL;
5994 }
5995
5996 if (mask.control[band].legacy == 0) {
5997 /* don't allow empty legacy rates if HT
5998 * is not even supported. */
5999 if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6000 return -EINVAL;
6001
6002 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6003 if (mask.control[band].mcs[i])
6004 break;
6005
6006 /* legacy and mcs rates may not be both empty */
6007 if (i == IEEE80211_HT_MCS_MASK_LEN)
6008 return -EINVAL;
6009 }
6010 }
6011
6012 return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
6013 }
6014
6015 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6016 {
6017 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6018 struct wireless_dev *wdev = info->user_ptr[1];
6019 u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6020
6021 if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6022 return -EINVAL;
6023
6024 if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6025 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6026
6027 switch (wdev->iftype) {
6028 case NL80211_IFTYPE_STATION:
6029 case NL80211_IFTYPE_ADHOC:
6030 case NL80211_IFTYPE_P2P_CLIENT:
6031 case NL80211_IFTYPE_AP:
6032 case NL80211_IFTYPE_AP_VLAN:
6033 case NL80211_IFTYPE_MESH_POINT:
6034 case NL80211_IFTYPE_P2P_GO:
6035 break;
6036 default:
6037 return -EOPNOTSUPP;
6038 }
6039
6040 /* not much point in registering if we can't reply */
6041 if (!rdev->ops->mgmt_tx)
6042 return -EOPNOTSUPP;
6043
6044 return cfg80211_mlme_register_mgmt(wdev, info->snd_pid, frame_type,
6045 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6046 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6047 }
6048
6049 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6050 {
6051 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6052 struct wireless_dev *wdev = info->user_ptr[1];
6053 struct ieee80211_channel *chan;
6054 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6055 bool channel_type_valid = false;
6056 u32 freq;
6057 int err;
6058 void *hdr = NULL;
6059 u64 cookie;
6060 struct sk_buff *msg = NULL;
6061 unsigned int wait = 0;
6062 bool offchan, no_cck, dont_wait_for_ack;
6063
6064 dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6065
6066 if (!info->attrs[NL80211_ATTR_FRAME] ||
6067 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6068 return -EINVAL;
6069
6070 if (!rdev->ops->mgmt_tx)
6071 return -EOPNOTSUPP;
6072
6073 switch (wdev->iftype) {
6074 case NL80211_IFTYPE_STATION:
6075 case NL80211_IFTYPE_ADHOC:
6076 case NL80211_IFTYPE_P2P_CLIENT:
6077 case NL80211_IFTYPE_AP:
6078 case NL80211_IFTYPE_AP_VLAN:
6079 case NL80211_IFTYPE_MESH_POINT:
6080 case NL80211_IFTYPE_P2P_GO:
6081 break;
6082 default:
6083 return -EOPNOTSUPP;
6084 }
6085
6086 if (info->attrs[NL80211_ATTR_DURATION]) {
6087 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6088 return -EINVAL;
6089 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6090
6091 /*
6092 * We should wait on the channel for at least a minimum amount
6093 * of time (10ms) but no longer than the driver supports.
6094 */
6095 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6096 wait > rdev->wiphy.max_remain_on_channel_duration)
6097 return -EINVAL;
6098
6099 }
6100
6101 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
6102 if (!nl80211_valid_channel_type(info, &channel_type))
6103 return -EINVAL;
6104 channel_type_valid = true;
6105 }
6106
6107 offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6108
6109 if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6110 return -EINVAL;
6111
6112 no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6113
6114 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6115 chan = rdev_freq_to_chan(rdev, freq, channel_type);
6116 if (chan == NULL)
6117 return -EINVAL;
6118
6119 if (!dont_wait_for_ack) {
6120 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6121 if (!msg)
6122 return -ENOMEM;
6123
6124 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6125 NL80211_CMD_FRAME);
6126
6127 if (IS_ERR(hdr)) {
6128 err = PTR_ERR(hdr);
6129 goto free_msg;
6130 }
6131 }
6132
6133 err = cfg80211_mlme_mgmt_tx(rdev, wdev, chan, offchan, channel_type,
6134 channel_type_valid, wait,
6135 nla_data(info->attrs[NL80211_ATTR_FRAME]),
6136 nla_len(info->attrs[NL80211_ATTR_FRAME]),
6137 no_cck, dont_wait_for_ack, &cookie);
6138 if (err)
6139 goto free_msg;
6140
6141 if (msg) {
6142 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6143 goto nla_put_failure;
6144
6145 genlmsg_end(msg, hdr);
6146 return genlmsg_reply(msg, info);
6147 }
6148
6149 return 0;
6150
6151 nla_put_failure:
6152 err = -ENOBUFS;
6153 free_msg:
6154 nlmsg_free(msg);
6155 return err;
6156 }
6157
6158 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6159 {
6160 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6161 struct wireless_dev *wdev = info->user_ptr[1];
6162 u64 cookie;
6163
6164 if (!info->attrs[NL80211_ATTR_COOKIE])
6165 return -EINVAL;
6166
6167 if (!rdev->ops->mgmt_tx_cancel_wait)
6168 return -EOPNOTSUPP;
6169
6170 switch (wdev->iftype) {
6171 case NL80211_IFTYPE_STATION:
6172 case NL80211_IFTYPE_ADHOC:
6173 case NL80211_IFTYPE_P2P_CLIENT:
6174 case NL80211_IFTYPE_AP:
6175 case NL80211_IFTYPE_AP_VLAN:
6176 case NL80211_IFTYPE_P2P_GO:
6177 break;
6178 default:
6179 return -EOPNOTSUPP;
6180 }
6181
6182 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6183
6184 return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, wdev, cookie);
6185 }
6186
6187 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6188 {
6189 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6190 struct wireless_dev *wdev;
6191 struct net_device *dev = info->user_ptr[1];
6192 u8 ps_state;
6193 bool state;
6194 int err;
6195
6196 if (!info->attrs[NL80211_ATTR_PS_STATE])
6197 return -EINVAL;
6198
6199 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6200
6201 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6202 return -EINVAL;
6203
6204 wdev = dev->ieee80211_ptr;
6205
6206 if (!rdev->ops->set_power_mgmt)
6207 return -EOPNOTSUPP;
6208
6209 state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6210
6211 if (state == wdev->ps)
6212 return 0;
6213
6214 err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6215 wdev->ps_timeout);
6216 if (!err)
6217 wdev->ps = state;
6218 return err;
6219 }
6220
6221 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6222 {
6223 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6224 enum nl80211_ps_state ps_state;
6225 struct wireless_dev *wdev;
6226 struct net_device *dev = info->user_ptr[1];
6227 struct sk_buff *msg;
6228 void *hdr;
6229 int err;
6230
6231 wdev = dev->ieee80211_ptr;
6232
6233 if (!rdev->ops->set_power_mgmt)
6234 return -EOPNOTSUPP;
6235
6236 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6237 if (!msg)
6238 return -ENOMEM;
6239
6240 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6241 NL80211_CMD_GET_POWER_SAVE);
6242 if (!hdr) {
6243 err = -ENOBUFS;
6244 goto free_msg;
6245 }
6246
6247 if (wdev->ps)
6248 ps_state = NL80211_PS_ENABLED;
6249 else
6250 ps_state = NL80211_PS_DISABLED;
6251
6252 if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6253 goto nla_put_failure;
6254
6255 genlmsg_end(msg, hdr);
6256 return genlmsg_reply(msg, info);
6257
6258 nla_put_failure:
6259 err = -ENOBUFS;
6260 free_msg:
6261 nlmsg_free(msg);
6262 return err;
6263 }
6264
6265 static struct nla_policy
6266 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6267 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6268 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6269 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6270 };
6271
6272 static int nl80211_set_cqm_rssi(struct genl_info *info,
6273 s32 threshold, u32 hysteresis)
6274 {
6275 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6276 struct wireless_dev *wdev;
6277 struct net_device *dev = info->user_ptr[1];
6278
6279 if (threshold > 0)
6280 return -EINVAL;
6281
6282 wdev = dev->ieee80211_ptr;
6283
6284 if (!rdev->ops->set_cqm_rssi_config)
6285 return -EOPNOTSUPP;
6286
6287 if (wdev->iftype != NL80211_IFTYPE_STATION &&
6288 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6289 return -EOPNOTSUPP;
6290
6291 return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6292 threshold, hysteresis);
6293 }
6294
6295 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6296 {
6297 struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6298 struct nlattr *cqm;
6299 int err;
6300
6301 cqm = info->attrs[NL80211_ATTR_CQM];
6302 if (!cqm) {
6303 err = -EINVAL;
6304 goto out;
6305 }
6306
6307 err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6308 nl80211_attr_cqm_policy);
6309 if (err)
6310 goto out;
6311
6312 if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6313 attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6314 s32 threshold;
6315 u32 hysteresis;
6316 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6317 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6318 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6319 } else
6320 err = -EINVAL;
6321
6322 out:
6323 return err;
6324 }
6325
6326 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6327 {
6328 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6329 struct net_device *dev = info->user_ptr[1];
6330 struct mesh_config cfg;
6331 struct mesh_setup setup;
6332 int err;
6333
6334 /* start with default */
6335 memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6336 memcpy(&setup, &default_mesh_setup, sizeof(setup));
6337
6338 if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6339 /* and parse parameters if given */
6340 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6341 if (err)
6342 return err;
6343 }
6344
6345 if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6346 !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6347 return -EINVAL;
6348
6349 setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6350 setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6351
6352 if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6353 !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6354 nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6355 return -EINVAL;
6356
6357 if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6358 /* parse additional setup parameters if given */
6359 err = nl80211_parse_mesh_setup(info, &setup);
6360 if (err)
6361 return err;
6362 }
6363
6364 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6365 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6366
6367 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6368 !nl80211_valid_channel_type(info, &channel_type))
6369 return -EINVAL;
6370
6371 setup.channel = rdev_freq_to_chan(rdev,
6372 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6373 channel_type);
6374 if (!setup.channel)
6375 return -EINVAL;
6376 setup.channel_type = channel_type;
6377 } else {
6378 /* cfg80211_join_mesh() will sort it out */
6379 setup.channel = NULL;
6380 }
6381
6382 return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6383 }
6384
6385 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6386 {
6387 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6388 struct net_device *dev = info->user_ptr[1];
6389
6390 return cfg80211_leave_mesh(rdev, dev);
6391 }
6392
6393 #ifdef CONFIG_PM
6394 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6395 {
6396 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6397 struct sk_buff *msg;
6398 void *hdr;
6399
6400 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6401 return -EOPNOTSUPP;
6402
6403 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6404 if (!msg)
6405 return -ENOMEM;
6406
6407 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6408 NL80211_CMD_GET_WOWLAN);
6409 if (!hdr)
6410 goto nla_put_failure;
6411
6412 if (rdev->wowlan) {
6413 struct nlattr *nl_wowlan;
6414
6415 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6416 if (!nl_wowlan)
6417 goto nla_put_failure;
6418
6419 if ((rdev->wowlan->any &&
6420 nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6421 (rdev->wowlan->disconnect &&
6422 nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6423 (rdev->wowlan->magic_pkt &&
6424 nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6425 (rdev->wowlan->gtk_rekey_failure &&
6426 nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6427 (rdev->wowlan->eap_identity_req &&
6428 nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6429 (rdev->wowlan->four_way_handshake &&
6430 nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6431 (rdev->wowlan->rfkill_release &&
6432 nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6433 goto nla_put_failure;
6434 if (rdev->wowlan->n_patterns) {
6435 struct nlattr *nl_pats, *nl_pat;
6436 int i, pat_len;
6437
6438 nl_pats = nla_nest_start(msg,
6439 NL80211_WOWLAN_TRIG_PKT_PATTERN);
6440 if (!nl_pats)
6441 goto nla_put_failure;
6442
6443 for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6444 nl_pat = nla_nest_start(msg, i + 1);
6445 if (!nl_pat)
6446 goto nla_put_failure;
6447 pat_len = rdev->wowlan->patterns[i].pattern_len;
6448 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6449 DIV_ROUND_UP(pat_len, 8),
6450 rdev->wowlan->patterns[i].mask) ||
6451 nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6452 pat_len,
6453 rdev->wowlan->patterns[i].pattern))
6454 goto nla_put_failure;
6455 nla_nest_end(msg, nl_pat);
6456 }
6457 nla_nest_end(msg, nl_pats);
6458 }
6459
6460 nla_nest_end(msg, nl_wowlan);
6461 }
6462
6463 genlmsg_end(msg, hdr);
6464 return genlmsg_reply(msg, info);
6465
6466 nla_put_failure:
6467 nlmsg_free(msg);
6468 return -ENOBUFS;
6469 }
6470
6471 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6472 {
6473 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6474 struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6475 struct cfg80211_wowlan new_triggers = {};
6476 struct cfg80211_wowlan *ntrig;
6477 struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6478 int err, i;
6479 bool prev_enabled = rdev->wowlan;
6480
6481 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6482 return -EOPNOTSUPP;
6483
6484 if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
6485 cfg80211_rdev_free_wowlan(rdev);
6486 rdev->wowlan = NULL;
6487 goto set_wakeup;
6488 }
6489
6490 err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6491 nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6492 nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6493 nl80211_wowlan_policy);
6494 if (err)
6495 return err;
6496
6497 if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6498 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6499 return -EINVAL;
6500 new_triggers.any = true;
6501 }
6502
6503 if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6504 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6505 return -EINVAL;
6506 new_triggers.disconnect = true;
6507 }
6508
6509 if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6510 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6511 return -EINVAL;
6512 new_triggers.magic_pkt = true;
6513 }
6514
6515 if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6516 return -EINVAL;
6517
6518 if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6519 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6520 return -EINVAL;
6521 new_triggers.gtk_rekey_failure = true;
6522 }
6523
6524 if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6525 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6526 return -EINVAL;
6527 new_triggers.eap_identity_req = true;
6528 }
6529
6530 if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6531 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6532 return -EINVAL;
6533 new_triggers.four_way_handshake = true;
6534 }
6535
6536 if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6537 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6538 return -EINVAL;
6539 new_triggers.rfkill_release = true;
6540 }
6541
6542 if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6543 struct nlattr *pat;
6544 int n_patterns = 0;
6545 int rem, pat_len, mask_len;
6546 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6547
6548 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6549 rem)
6550 n_patterns++;
6551 if (n_patterns > wowlan->n_patterns)
6552 return -EINVAL;
6553
6554 new_triggers.patterns = kcalloc(n_patterns,
6555 sizeof(new_triggers.patterns[0]),
6556 GFP_KERNEL);
6557 if (!new_triggers.patterns)
6558 return -ENOMEM;
6559
6560 new_triggers.n_patterns = n_patterns;
6561 i = 0;
6562
6563 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6564 rem) {
6565 nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6566 nla_data(pat), nla_len(pat), NULL);
6567 err = -EINVAL;
6568 if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6569 !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6570 goto error;
6571 pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6572 mask_len = DIV_ROUND_UP(pat_len, 8);
6573 if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6574 mask_len)
6575 goto error;
6576 if (pat_len > wowlan->pattern_max_len ||
6577 pat_len < wowlan->pattern_min_len)
6578 goto error;
6579
6580 new_triggers.patterns[i].mask =
6581 kmalloc(mask_len + pat_len, GFP_KERNEL);
6582 if (!new_triggers.patterns[i].mask) {
6583 err = -ENOMEM;
6584 goto error;
6585 }
6586 new_triggers.patterns[i].pattern =
6587 new_triggers.patterns[i].mask + mask_len;
6588 memcpy(new_triggers.patterns[i].mask,
6589 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6590 mask_len);
6591 new_triggers.patterns[i].pattern_len = pat_len;
6592 memcpy(new_triggers.patterns[i].pattern,
6593 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6594 pat_len);
6595 i++;
6596 }
6597 }
6598
6599 ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
6600 if (!ntrig) {
6601 err = -ENOMEM;
6602 goto error;
6603 }
6604 cfg80211_rdev_free_wowlan(rdev);
6605 rdev->wowlan = ntrig;
6606
6607 set_wakeup:
6608 if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6609 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6610
6611 return 0;
6612 error:
6613 for (i = 0; i < new_triggers.n_patterns; i++)
6614 kfree(new_triggers.patterns[i].mask);
6615 kfree(new_triggers.patterns);
6616 return err;
6617 }
6618 #endif
6619
6620 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6621 {
6622 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6623 struct net_device *dev = info->user_ptr[1];
6624 struct wireless_dev *wdev = dev->ieee80211_ptr;
6625 struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6626 struct cfg80211_gtk_rekey_data rekey_data;
6627 int err;
6628
6629 if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6630 return -EINVAL;
6631
6632 err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6633 nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6634 nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6635 nl80211_rekey_policy);
6636 if (err)
6637 return err;
6638
6639 if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6640 return -ERANGE;
6641 if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6642 return -ERANGE;
6643 if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6644 return -ERANGE;
6645
6646 memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6647 NL80211_KEK_LEN);
6648 memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6649 NL80211_KCK_LEN);
6650 memcpy(rekey_data.replay_ctr,
6651 nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6652 NL80211_REPLAY_CTR_LEN);
6653
6654 wdev_lock(wdev);
6655 if (!wdev->current_bss) {
6656 err = -ENOTCONN;
6657 goto out;
6658 }
6659
6660 if (!rdev->ops->set_rekey_data) {
6661 err = -EOPNOTSUPP;
6662 goto out;
6663 }
6664
6665 err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6666 out:
6667 wdev_unlock(wdev);
6668 return err;
6669 }
6670
6671 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6672 struct genl_info *info)
6673 {
6674 struct net_device *dev = info->user_ptr[1];
6675 struct wireless_dev *wdev = dev->ieee80211_ptr;
6676
6677 if (wdev->iftype != NL80211_IFTYPE_AP &&
6678 wdev->iftype != NL80211_IFTYPE_P2P_GO)
6679 return -EINVAL;
6680
6681 if (wdev->ap_unexpected_nlpid)
6682 return -EBUSY;
6683
6684 wdev->ap_unexpected_nlpid = info->snd_pid;
6685 return 0;
6686 }
6687
6688 static int nl80211_probe_client(struct sk_buff *skb,
6689 struct genl_info *info)
6690 {
6691 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6692 struct net_device *dev = info->user_ptr[1];
6693 struct wireless_dev *wdev = dev->ieee80211_ptr;
6694 struct sk_buff *msg;
6695 void *hdr;
6696 const u8 *addr;
6697 u64 cookie;
6698 int err;
6699
6700 if (wdev->iftype != NL80211_IFTYPE_AP &&
6701 wdev->iftype != NL80211_IFTYPE_P2P_GO)
6702 return -EOPNOTSUPP;
6703
6704 if (!info->attrs[NL80211_ATTR_MAC])
6705 return -EINVAL;
6706
6707 if (!rdev->ops->probe_client)
6708 return -EOPNOTSUPP;
6709
6710 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6711 if (!msg)
6712 return -ENOMEM;
6713
6714 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6715 NL80211_CMD_PROBE_CLIENT);
6716
6717 if (IS_ERR(hdr)) {
6718 err = PTR_ERR(hdr);
6719 goto free_msg;
6720 }
6721
6722 addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6723
6724 err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6725 if (err)
6726 goto free_msg;
6727
6728 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6729 goto nla_put_failure;
6730
6731 genlmsg_end(msg, hdr);
6732
6733 return genlmsg_reply(msg, info);
6734
6735 nla_put_failure:
6736 err = -ENOBUFS;
6737 free_msg:
6738 nlmsg_free(msg);
6739 return err;
6740 }
6741
6742 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6743 {
6744 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6745
6746 if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6747 return -EOPNOTSUPP;
6748
6749 if (rdev->ap_beacons_nlpid)
6750 return -EBUSY;
6751
6752 rdev->ap_beacons_nlpid = info->snd_pid;
6753
6754 return 0;
6755 }
6756
6757 #define NL80211_FLAG_NEED_WIPHY 0x01
6758 #define NL80211_FLAG_NEED_NETDEV 0x02
6759 #define NL80211_FLAG_NEED_RTNL 0x04
6760 #define NL80211_FLAG_CHECK_NETDEV_UP 0x08
6761 #define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\
6762 NL80211_FLAG_CHECK_NETDEV_UP)
6763 #define NL80211_FLAG_NEED_WDEV 0x10
6764 /* If a netdev is associated, it must be UP */
6765 #define NL80211_FLAG_NEED_WDEV_UP (NL80211_FLAG_NEED_WDEV |\
6766 NL80211_FLAG_CHECK_NETDEV_UP)
6767
6768 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6769 struct genl_info *info)
6770 {
6771 struct cfg80211_registered_device *rdev;
6772 struct wireless_dev *wdev;
6773 struct net_device *dev;
6774 bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6775
6776 if (rtnl)
6777 rtnl_lock();
6778
6779 if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6780 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6781 if (IS_ERR(rdev)) {
6782 if (rtnl)
6783 rtnl_unlock();
6784 return PTR_ERR(rdev);
6785 }
6786 info->user_ptr[0] = rdev;
6787 } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
6788 ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
6789 mutex_lock(&cfg80211_mutex);
6790 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
6791 info->attrs);
6792 if (IS_ERR(wdev)) {
6793 mutex_unlock(&cfg80211_mutex);
6794 if (rtnl)
6795 rtnl_unlock();
6796 return PTR_ERR(wdev);
6797 }
6798
6799 dev = wdev->netdev;
6800 rdev = wiphy_to_dev(wdev->wiphy);
6801
6802 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6803 if (!dev) {
6804 mutex_unlock(&cfg80211_mutex);
6805 if (rtnl)
6806 rtnl_unlock();
6807 return -EINVAL;
6808 }
6809
6810 info->user_ptr[1] = dev;
6811 } else {
6812 info->user_ptr[1] = wdev;
6813 }
6814
6815 if (dev) {
6816 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6817 !netif_running(dev)) {
6818 mutex_unlock(&cfg80211_mutex);
6819 if (rtnl)
6820 rtnl_unlock();
6821 return -ENETDOWN;
6822 }
6823
6824 dev_hold(dev);
6825 }
6826
6827 cfg80211_lock_rdev(rdev);
6828
6829 mutex_unlock(&cfg80211_mutex);
6830
6831 info->user_ptr[0] = rdev;
6832 }
6833
6834 return 0;
6835 }
6836
6837 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6838 struct genl_info *info)
6839 {
6840 if (info->user_ptr[0])
6841 cfg80211_unlock_rdev(info->user_ptr[0]);
6842 if (info->user_ptr[1]) {
6843 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
6844 struct wireless_dev *wdev = info->user_ptr[1];
6845
6846 if (wdev->netdev)
6847 dev_put(wdev->netdev);
6848 } else {
6849 dev_put(info->user_ptr[1]);
6850 }
6851 }
6852 if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6853 rtnl_unlock();
6854 }
6855
6856 static struct genl_ops nl80211_ops[] = {
6857 {
6858 .cmd = NL80211_CMD_GET_WIPHY,
6859 .doit = nl80211_get_wiphy,
6860 .dumpit = nl80211_dump_wiphy,
6861 .policy = nl80211_policy,
6862 /* can be retrieved by unprivileged users */
6863 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6864 },
6865 {
6866 .cmd = NL80211_CMD_SET_WIPHY,
6867 .doit = nl80211_set_wiphy,
6868 .policy = nl80211_policy,
6869 .flags = GENL_ADMIN_PERM,
6870 .internal_flags = NL80211_FLAG_NEED_RTNL,
6871 },
6872 {
6873 .cmd = NL80211_CMD_GET_INTERFACE,
6874 .doit = nl80211_get_interface,
6875 .dumpit = nl80211_dump_interface,
6876 .policy = nl80211_policy,
6877 /* can be retrieved by unprivileged users */
6878 .internal_flags = NL80211_FLAG_NEED_WDEV,
6879 },
6880 {
6881 .cmd = NL80211_CMD_SET_INTERFACE,
6882 .doit = nl80211_set_interface,
6883 .policy = nl80211_policy,
6884 .flags = GENL_ADMIN_PERM,
6885 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6886 NL80211_FLAG_NEED_RTNL,
6887 },
6888 {
6889 .cmd = NL80211_CMD_NEW_INTERFACE,
6890 .doit = nl80211_new_interface,
6891 .policy = nl80211_policy,
6892 .flags = GENL_ADMIN_PERM,
6893 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6894 NL80211_FLAG_NEED_RTNL,
6895 },
6896 {
6897 .cmd = NL80211_CMD_DEL_INTERFACE,
6898 .doit = nl80211_del_interface,
6899 .policy = nl80211_policy,
6900 .flags = GENL_ADMIN_PERM,
6901 .internal_flags = NL80211_FLAG_NEED_WDEV |
6902 NL80211_FLAG_NEED_RTNL,
6903 },
6904 {
6905 .cmd = NL80211_CMD_GET_KEY,
6906 .doit = nl80211_get_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_SET_KEY,
6914 .doit = nl80211_set_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_NEW_KEY,
6922 .doit = nl80211_new_key,
6923 .policy = nl80211_policy,
6924 .flags = GENL_ADMIN_PERM,
6925 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6926 NL80211_FLAG_NEED_RTNL,
6927 },
6928 {
6929 .cmd = NL80211_CMD_DEL_KEY,
6930 .doit = nl80211_del_key,
6931 .policy = nl80211_policy,
6932 .flags = GENL_ADMIN_PERM,
6933 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6934 NL80211_FLAG_NEED_RTNL,
6935 },
6936 {
6937 .cmd = NL80211_CMD_SET_BEACON,
6938 .policy = nl80211_policy,
6939 .flags = GENL_ADMIN_PERM,
6940 .doit = nl80211_set_beacon,
6941 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6942 NL80211_FLAG_NEED_RTNL,
6943 },
6944 {
6945 .cmd = NL80211_CMD_START_AP,
6946 .policy = nl80211_policy,
6947 .flags = GENL_ADMIN_PERM,
6948 .doit = nl80211_start_ap,
6949 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6950 NL80211_FLAG_NEED_RTNL,
6951 },
6952 {
6953 .cmd = NL80211_CMD_STOP_AP,
6954 .policy = nl80211_policy,
6955 .flags = GENL_ADMIN_PERM,
6956 .doit = nl80211_stop_ap,
6957 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6958 NL80211_FLAG_NEED_RTNL,
6959 },
6960 {
6961 .cmd = NL80211_CMD_GET_STATION,
6962 .doit = nl80211_get_station,
6963 .dumpit = nl80211_dump_station,
6964 .policy = nl80211_policy,
6965 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6966 NL80211_FLAG_NEED_RTNL,
6967 },
6968 {
6969 .cmd = NL80211_CMD_SET_STATION,
6970 .doit = nl80211_set_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_NEW_STATION,
6978 .doit = nl80211_new_station,
6979 .policy = nl80211_policy,
6980 .flags = GENL_ADMIN_PERM,
6981 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6982 NL80211_FLAG_NEED_RTNL,
6983 },
6984 {
6985 .cmd = NL80211_CMD_DEL_STATION,
6986 .doit = nl80211_del_station,
6987 .policy = nl80211_policy,
6988 .flags = GENL_ADMIN_PERM,
6989 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6990 NL80211_FLAG_NEED_RTNL,
6991 },
6992 {
6993 .cmd = NL80211_CMD_GET_MPATH,
6994 .doit = nl80211_get_mpath,
6995 .dumpit = nl80211_dump_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_SET_MPATH,
7003 .doit = nl80211_set_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_NEW_MPATH,
7011 .doit = nl80211_new_mpath,
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_DEL_MPATH,
7019 .doit = nl80211_del_mpath,
7020 .policy = nl80211_policy,
7021 .flags = GENL_ADMIN_PERM,
7022 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7023 NL80211_FLAG_NEED_RTNL,
7024 },
7025 {
7026 .cmd = NL80211_CMD_SET_BSS,
7027 .doit = nl80211_set_bss,
7028 .policy = nl80211_policy,
7029 .flags = GENL_ADMIN_PERM,
7030 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7031 NL80211_FLAG_NEED_RTNL,
7032 },
7033 {
7034 .cmd = NL80211_CMD_GET_REG,
7035 .doit = nl80211_get_reg,
7036 .policy = nl80211_policy,
7037 /* can be retrieved by unprivileged users */
7038 },
7039 {
7040 .cmd = NL80211_CMD_SET_REG,
7041 .doit = nl80211_set_reg,
7042 .policy = nl80211_policy,
7043 .flags = GENL_ADMIN_PERM,
7044 },
7045 {
7046 .cmd = NL80211_CMD_REQ_SET_REG,
7047 .doit = nl80211_req_set_reg,
7048 .policy = nl80211_policy,
7049 .flags = GENL_ADMIN_PERM,
7050 },
7051 {
7052 .cmd = NL80211_CMD_GET_MESH_CONFIG,
7053 .doit = nl80211_get_mesh_config,
7054 .policy = nl80211_policy,
7055 /* can be retrieved by unprivileged users */
7056 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7057 NL80211_FLAG_NEED_RTNL,
7058 },
7059 {
7060 .cmd = NL80211_CMD_SET_MESH_CONFIG,
7061 .doit = nl80211_update_mesh_config,
7062 .policy = nl80211_policy,
7063 .flags = GENL_ADMIN_PERM,
7064 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7065 NL80211_FLAG_NEED_RTNL,
7066 },
7067 {
7068 .cmd = NL80211_CMD_TRIGGER_SCAN,
7069 .doit = nl80211_trigger_scan,
7070 .policy = nl80211_policy,
7071 .flags = GENL_ADMIN_PERM,
7072 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7073 NL80211_FLAG_NEED_RTNL,
7074 },
7075 {
7076 .cmd = NL80211_CMD_GET_SCAN,
7077 .policy = nl80211_policy,
7078 .dumpit = nl80211_dump_scan,
7079 },
7080 {
7081 .cmd = NL80211_CMD_START_SCHED_SCAN,
7082 .doit = nl80211_start_sched_scan,
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_STOP_SCHED_SCAN,
7090 .doit = nl80211_stop_sched_scan,
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_AUTHENTICATE,
7098 .doit = nl80211_authenticate,
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_ASSOCIATE,
7106 .doit = nl80211_associate,
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_DEAUTHENTICATE,
7114 .doit = nl80211_deauthenticate,
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_DISASSOCIATE,
7122 .doit = nl80211_disassociate,
7123 .policy = nl80211_policy,
7124 .flags = GENL_ADMIN_PERM,
7125 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7126 NL80211_FLAG_NEED_RTNL,
7127 },
7128 {
7129 .cmd = NL80211_CMD_JOIN_IBSS,
7130 .doit = nl80211_join_ibss,
7131 .policy = nl80211_policy,
7132 .flags = GENL_ADMIN_PERM,
7133 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7134 NL80211_FLAG_NEED_RTNL,
7135 },
7136 {
7137 .cmd = NL80211_CMD_LEAVE_IBSS,
7138 .doit = nl80211_leave_ibss,
7139 .policy = nl80211_policy,
7140 .flags = GENL_ADMIN_PERM,
7141 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7142 NL80211_FLAG_NEED_RTNL,
7143 },
7144 #ifdef CONFIG_NL80211_TESTMODE
7145 {
7146 .cmd = NL80211_CMD_TESTMODE,
7147 .doit = nl80211_testmode_do,
7148 .dumpit = nl80211_testmode_dump,
7149 .policy = nl80211_policy,
7150 .flags = GENL_ADMIN_PERM,
7151 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7152 NL80211_FLAG_NEED_RTNL,
7153 },
7154 #endif
7155 {
7156 .cmd = NL80211_CMD_CONNECT,
7157 .doit = nl80211_connect,
7158 .policy = nl80211_policy,
7159 .flags = GENL_ADMIN_PERM,
7160 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7161 NL80211_FLAG_NEED_RTNL,
7162 },
7163 {
7164 .cmd = NL80211_CMD_DISCONNECT,
7165 .doit = nl80211_disconnect,
7166 .policy = nl80211_policy,
7167 .flags = GENL_ADMIN_PERM,
7168 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7169 NL80211_FLAG_NEED_RTNL,
7170 },
7171 {
7172 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7173 .doit = nl80211_wiphy_netns,
7174 .policy = nl80211_policy,
7175 .flags = GENL_ADMIN_PERM,
7176 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7177 NL80211_FLAG_NEED_RTNL,
7178 },
7179 {
7180 .cmd = NL80211_CMD_GET_SURVEY,
7181 .policy = nl80211_policy,
7182 .dumpit = nl80211_dump_survey,
7183 },
7184 {
7185 .cmd = NL80211_CMD_SET_PMKSA,
7186 .doit = nl80211_setdel_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_DEL_PMKSA,
7194 .doit = nl80211_setdel_pmksa,
7195 .policy = nl80211_policy,
7196 .flags = GENL_ADMIN_PERM,
7197 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7198 NL80211_FLAG_NEED_RTNL,
7199 },
7200 {
7201 .cmd = NL80211_CMD_FLUSH_PMKSA,
7202 .doit = nl80211_flush_pmksa,
7203 .policy = nl80211_policy,
7204 .flags = GENL_ADMIN_PERM,
7205 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7206 NL80211_FLAG_NEED_RTNL,
7207 },
7208 {
7209 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7210 .doit = nl80211_remain_on_channel,
7211 .policy = nl80211_policy,
7212 .flags = GENL_ADMIN_PERM,
7213 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7214 NL80211_FLAG_NEED_RTNL,
7215 },
7216 {
7217 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7218 .doit = nl80211_cancel_remain_on_channel,
7219 .policy = nl80211_policy,
7220 .flags = GENL_ADMIN_PERM,
7221 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7222 NL80211_FLAG_NEED_RTNL,
7223 },
7224 {
7225 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7226 .doit = nl80211_set_tx_bitrate_mask,
7227 .policy = nl80211_policy,
7228 .flags = GENL_ADMIN_PERM,
7229 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7230 NL80211_FLAG_NEED_RTNL,
7231 },
7232 {
7233 .cmd = NL80211_CMD_REGISTER_FRAME,
7234 .doit = nl80211_register_mgmt,
7235 .policy = nl80211_policy,
7236 .flags = GENL_ADMIN_PERM,
7237 .internal_flags = NL80211_FLAG_NEED_WDEV |
7238 NL80211_FLAG_NEED_RTNL,
7239 },
7240 {
7241 .cmd = NL80211_CMD_FRAME,
7242 .doit = nl80211_tx_mgmt,
7243 .policy = nl80211_policy,
7244 .flags = GENL_ADMIN_PERM,
7245 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7246 NL80211_FLAG_NEED_RTNL,
7247 },
7248 {
7249 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7250 .doit = nl80211_tx_mgmt_cancel_wait,
7251 .policy = nl80211_policy,
7252 .flags = GENL_ADMIN_PERM,
7253 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7254 NL80211_FLAG_NEED_RTNL,
7255 },
7256 {
7257 .cmd = NL80211_CMD_SET_POWER_SAVE,
7258 .doit = nl80211_set_power_save,
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_GET_POWER_SAVE,
7266 .doit = nl80211_get_power_save,
7267 .policy = nl80211_policy,
7268 /* can be retrieved by unprivileged users */
7269 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7270 NL80211_FLAG_NEED_RTNL,
7271 },
7272 {
7273 .cmd = NL80211_CMD_SET_CQM,
7274 .doit = nl80211_set_cqm,
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_SET_CHANNEL,
7282 .doit = nl80211_set_channel,
7283 .policy = nl80211_policy,
7284 .flags = GENL_ADMIN_PERM,
7285 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7286 NL80211_FLAG_NEED_RTNL,
7287 },
7288 {
7289 .cmd = NL80211_CMD_SET_WDS_PEER,
7290 .doit = nl80211_set_wds_peer,
7291 .policy = nl80211_policy,
7292 .flags = GENL_ADMIN_PERM,
7293 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7294 NL80211_FLAG_NEED_RTNL,
7295 },
7296 {
7297 .cmd = NL80211_CMD_JOIN_MESH,
7298 .doit = nl80211_join_mesh,
7299 .policy = nl80211_policy,
7300 .flags = GENL_ADMIN_PERM,
7301 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7302 NL80211_FLAG_NEED_RTNL,
7303 },
7304 {
7305 .cmd = NL80211_CMD_LEAVE_MESH,
7306 .doit = nl80211_leave_mesh,
7307 .policy = nl80211_policy,
7308 .flags = GENL_ADMIN_PERM,
7309 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7310 NL80211_FLAG_NEED_RTNL,
7311 },
7312 #ifdef CONFIG_PM
7313 {
7314 .cmd = NL80211_CMD_GET_WOWLAN,
7315 .doit = nl80211_get_wowlan,
7316 .policy = nl80211_policy,
7317 /* can be retrieved by unprivileged users */
7318 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7319 NL80211_FLAG_NEED_RTNL,
7320 },
7321 {
7322 .cmd = NL80211_CMD_SET_WOWLAN,
7323 .doit = nl80211_set_wowlan,
7324 .policy = nl80211_policy,
7325 .flags = GENL_ADMIN_PERM,
7326 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7327 NL80211_FLAG_NEED_RTNL,
7328 },
7329 #endif
7330 {
7331 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7332 .doit = nl80211_set_rekey_data,
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_TDLS_MGMT,
7340 .doit = nl80211_tdls_mgmt,
7341 .policy = nl80211_policy,
7342 .flags = GENL_ADMIN_PERM,
7343 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7344 NL80211_FLAG_NEED_RTNL,
7345 },
7346 {
7347 .cmd = NL80211_CMD_TDLS_OPER,
7348 .doit = nl80211_tdls_oper,
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_UNEXPECTED_FRAME,
7356 .doit = nl80211_register_unexpected_frame,
7357 .policy = nl80211_policy,
7358 .flags = GENL_ADMIN_PERM,
7359 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7360 NL80211_FLAG_NEED_RTNL,
7361 },
7362 {
7363 .cmd = NL80211_CMD_PROBE_CLIENT,
7364 .doit = nl80211_probe_client,
7365 .policy = nl80211_policy,
7366 .flags = GENL_ADMIN_PERM,
7367 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7368 NL80211_FLAG_NEED_RTNL,
7369 },
7370 {
7371 .cmd = NL80211_CMD_REGISTER_BEACONS,
7372 .doit = nl80211_register_beacons,
7373 .policy = nl80211_policy,
7374 .flags = GENL_ADMIN_PERM,
7375 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7376 NL80211_FLAG_NEED_RTNL,
7377 },
7378 {
7379 .cmd = NL80211_CMD_SET_NOACK_MAP,
7380 .doit = nl80211_set_noack_map,
7381 .policy = nl80211_policy,
7382 .flags = GENL_ADMIN_PERM,
7383 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7384 NL80211_FLAG_NEED_RTNL,
7385 },
7386
7387 };
7388
7389 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7390 .name = "mlme",
7391 };
7392
7393 /* multicast groups */
7394 static struct genl_multicast_group nl80211_config_mcgrp = {
7395 .name = "config",
7396 };
7397 static struct genl_multicast_group nl80211_scan_mcgrp = {
7398 .name = "scan",
7399 };
7400 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7401 .name = "regulatory",
7402 };
7403
7404 /* notification functions */
7405
7406 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7407 {
7408 struct sk_buff *msg;
7409
7410 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7411 if (!msg)
7412 return;
7413
7414 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7415 nlmsg_free(msg);
7416 return;
7417 }
7418
7419 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7420 nl80211_config_mcgrp.id, GFP_KERNEL);
7421 }
7422
7423 static int nl80211_add_scan_req(struct sk_buff *msg,
7424 struct cfg80211_registered_device *rdev)
7425 {
7426 struct cfg80211_scan_request *req = rdev->scan_req;
7427 struct nlattr *nest;
7428 int i;
7429
7430 ASSERT_RDEV_LOCK(rdev);
7431
7432 if (WARN_ON(!req))
7433 return 0;
7434
7435 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7436 if (!nest)
7437 goto nla_put_failure;
7438 for (i = 0; i < req->n_ssids; i++) {
7439 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7440 goto nla_put_failure;
7441 }
7442 nla_nest_end(msg, nest);
7443
7444 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7445 if (!nest)
7446 goto nla_put_failure;
7447 for (i = 0; i < req->n_channels; i++) {
7448 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7449 goto nla_put_failure;
7450 }
7451 nla_nest_end(msg, nest);
7452
7453 if (req->ie &&
7454 nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7455 goto nla_put_failure;
7456
7457 return 0;
7458 nla_put_failure:
7459 return -ENOBUFS;
7460 }
7461
7462 static int nl80211_send_scan_msg(struct sk_buff *msg,
7463 struct cfg80211_registered_device *rdev,
7464 struct wireless_dev *wdev,
7465 u32 pid, u32 seq, int flags,
7466 u32 cmd)
7467 {
7468 void *hdr;
7469
7470 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7471 if (!hdr)
7472 return -1;
7473
7474 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7475 (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
7476 wdev->netdev->ifindex)) ||
7477 nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
7478 goto nla_put_failure;
7479
7480 /* ignore errors and send incomplete event anyway */
7481 nl80211_add_scan_req(msg, rdev);
7482
7483 return genlmsg_end(msg, hdr);
7484
7485 nla_put_failure:
7486 genlmsg_cancel(msg, hdr);
7487 return -EMSGSIZE;
7488 }
7489
7490 static int
7491 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7492 struct cfg80211_registered_device *rdev,
7493 struct net_device *netdev,
7494 u32 pid, u32 seq, int flags, u32 cmd)
7495 {
7496 void *hdr;
7497
7498 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7499 if (!hdr)
7500 return -1;
7501
7502 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7503 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7504 goto nla_put_failure;
7505
7506 return genlmsg_end(msg, hdr);
7507
7508 nla_put_failure:
7509 genlmsg_cancel(msg, hdr);
7510 return -EMSGSIZE;
7511 }
7512
7513 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7514 struct wireless_dev *wdev)
7515 {
7516 struct sk_buff *msg;
7517
7518 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7519 if (!msg)
7520 return;
7521
7522 if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7523 NL80211_CMD_TRIGGER_SCAN) < 0) {
7524 nlmsg_free(msg);
7525 return;
7526 }
7527
7528 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7529 nl80211_scan_mcgrp.id, GFP_KERNEL);
7530 }
7531
7532 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7533 struct wireless_dev *wdev)
7534 {
7535 struct sk_buff *msg;
7536
7537 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7538 if (!msg)
7539 return;
7540
7541 if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7542 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7543 nlmsg_free(msg);
7544 return;
7545 }
7546
7547 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7548 nl80211_scan_mcgrp.id, GFP_KERNEL);
7549 }
7550
7551 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7552 struct wireless_dev *wdev)
7553 {
7554 struct sk_buff *msg;
7555
7556 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7557 if (!msg)
7558 return;
7559
7560 if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7561 NL80211_CMD_SCAN_ABORTED) < 0) {
7562 nlmsg_free(msg);
7563 return;
7564 }
7565
7566 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7567 nl80211_scan_mcgrp.id, GFP_KERNEL);
7568 }
7569
7570 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7571 struct net_device *netdev)
7572 {
7573 struct sk_buff *msg;
7574
7575 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7576 if (!msg)
7577 return;
7578
7579 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7580 NL80211_CMD_SCHED_SCAN_RESULTS) < 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 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7590 struct net_device *netdev, u32 cmd)
7591 {
7592 struct sk_buff *msg;
7593
7594 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7595 if (!msg)
7596 return;
7597
7598 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7599 nlmsg_free(msg);
7600 return;
7601 }
7602
7603 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7604 nl80211_scan_mcgrp.id, GFP_KERNEL);
7605 }
7606
7607 /*
7608 * This can happen on global regulatory changes or device specific settings
7609 * based on custom world regulatory domains.
7610 */
7611 void nl80211_send_reg_change_event(struct regulatory_request *request)
7612 {
7613 struct sk_buff *msg;
7614 void *hdr;
7615
7616 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7617 if (!msg)
7618 return;
7619
7620 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7621 if (!hdr) {
7622 nlmsg_free(msg);
7623 return;
7624 }
7625
7626 /* Userspace can always count this one always being set */
7627 if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7628 goto nla_put_failure;
7629
7630 if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7631 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7632 NL80211_REGDOM_TYPE_WORLD))
7633 goto nla_put_failure;
7634 } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7635 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7636 NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7637 goto nla_put_failure;
7638 } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7639 request->intersect) {
7640 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7641 NL80211_REGDOM_TYPE_INTERSECTION))
7642 goto nla_put_failure;
7643 } else {
7644 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7645 NL80211_REGDOM_TYPE_COUNTRY) ||
7646 nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7647 request->alpha2))
7648 goto nla_put_failure;
7649 }
7650
7651 if (wiphy_idx_valid(request->wiphy_idx) &&
7652 nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7653 goto nla_put_failure;
7654
7655 genlmsg_end(msg, hdr);
7656
7657 rcu_read_lock();
7658 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7659 GFP_ATOMIC);
7660 rcu_read_unlock();
7661
7662 return;
7663
7664 nla_put_failure:
7665 genlmsg_cancel(msg, hdr);
7666 nlmsg_free(msg);
7667 }
7668
7669 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7670 struct net_device *netdev,
7671 const u8 *buf, size_t len,
7672 enum nl80211_commands cmd, gfp_t gfp)
7673 {
7674 struct sk_buff *msg;
7675 void *hdr;
7676
7677 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7678 if (!msg)
7679 return;
7680
7681 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7682 if (!hdr) {
7683 nlmsg_free(msg);
7684 return;
7685 }
7686
7687 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7688 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7689 nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7690 goto nla_put_failure;
7691
7692 genlmsg_end(msg, hdr);
7693
7694 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7695 nl80211_mlme_mcgrp.id, gfp);
7696 return;
7697
7698 nla_put_failure:
7699 genlmsg_cancel(msg, hdr);
7700 nlmsg_free(msg);
7701 }
7702
7703 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7704 struct net_device *netdev, const u8 *buf,
7705 size_t len, gfp_t gfp)
7706 {
7707 nl80211_send_mlme_event(rdev, netdev, buf, len,
7708 NL80211_CMD_AUTHENTICATE, gfp);
7709 }
7710
7711 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7712 struct net_device *netdev, const u8 *buf,
7713 size_t len, gfp_t gfp)
7714 {
7715 nl80211_send_mlme_event(rdev, netdev, buf, len,
7716 NL80211_CMD_ASSOCIATE, gfp);
7717 }
7718
7719 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7720 struct net_device *netdev, const u8 *buf,
7721 size_t len, gfp_t gfp)
7722 {
7723 nl80211_send_mlme_event(rdev, netdev, buf, len,
7724 NL80211_CMD_DEAUTHENTICATE, gfp);
7725 }
7726
7727 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7728 struct net_device *netdev, const u8 *buf,
7729 size_t len, gfp_t gfp)
7730 {
7731 nl80211_send_mlme_event(rdev, netdev, buf, len,
7732 NL80211_CMD_DISASSOCIATE, gfp);
7733 }
7734
7735 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7736 struct net_device *netdev, const u8 *buf,
7737 size_t len, gfp_t gfp)
7738 {
7739 nl80211_send_mlme_event(rdev, netdev, buf, len,
7740 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7741 }
7742
7743 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7744 struct net_device *netdev, const u8 *buf,
7745 size_t len, gfp_t gfp)
7746 {
7747 nl80211_send_mlme_event(rdev, netdev, buf, len,
7748 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7749 }
7750
7751 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7752 struct net_device *netdev, int cmd,
7753 const u8 *addr, gfp_t gfp)
7754 {
7755 struct sk_buff *msg;
7756 void *hdr;
7757
7758 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7759 if (!msg)
7760 return;
7761
7762 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7763 if (!hdr) {
7764 nlmsg_free(msg);
7765 return;
7766 }
7767
7768 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7769 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7770 nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7771 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7772 goto nla_put_failure;
7773
7774 genlmsg_end(msg, hdr);
7775
7776 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7777 nl80211_mlme_mcgrp.id, gfp);
7778 return;
7779
7780 nla_put_failure:
7781 genlmsg_cancel(msg, hdr);
7782 nlmsg_free(msg);
7783 }
7784
7785 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7786 struct net_device *netdev, const u8 *addr,
7787 gfp_t gfp)
7788 {
7789 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7790 addr, gfp);
7791 }
7792
7793 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7794 struct net_device *netdev, const u8 *addr,
7795 gfp_t gfp)
7796 {
7797 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7798 addr, gfp);
7799 }
7800
7801 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7802 struct net_device *netdev, const u8 *bssid,
7803 const u8 *req_ie, size_t req_ie_len,
7804 const u8 *resp_ie, size_t resp_ie_len,
7805 u16 status, gfp_t gfp)
7806 {
7807 struct sk_buff *msg;
7808 void *hdr;
7809
7810 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7811 if (!msg)
7812 return;
7813
7814 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7815 if (!hdr) {
7816 nlmsg_free(msg);
7817 return;
7818 }
7819
7820 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7821 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7822 (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7823 nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7824 (req_ie &&
7825 nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7826 (resp_ie &&
7827 nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7828 goto nla_put_failure;
7829
7830 genlmsg_end(msg, hdr);
7831
7832 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7833 nl80211_mlme_mcgrp.id, gfp);
7834 return;
7835
7836 nla_put_failure:
7837 genlmsg_cancel(msg, hdr);
7838 nlmsg_free(msg);
7839
7840 }
7841
7842 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7843 struct net_device *netdev, const u8 *bssid,
7844 const u8 *req_ie, size_t req_ie_len,
7845 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7846 {
7847 struct sk_buff *msg;
7848 void *hdr;
7849
7850 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7851 if (!msg)
7852 return;
7853
7854 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7855 if (!hdr) {
7856 nlmsg_free(msg);
7857 return;
7858 }
7859
7860 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7861 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7862 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7863 (req_ie &&
7864 nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7865 (resp_ie &&
7866 nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7867 goto nla_put_failure;
7868
7869 genlmsg_end(msg, hdr);
7870
7871 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7872 nl80211_mlme_mcgrp.id, gfp);
7873 return;
7874
7875 nla_put_failure:
7876 genlmsg_cancel(msg, hdr);
7877 nlmsg_free(msg);
7878
7879 }
7880
7881 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7882 struct net_device *netdev, u16 reason,
7883 const u8 *ie, size_t ie_len, bool from_ap)
7884 {
7885 struct sk_buff *msg;
7886 void *hdr;
7887
7888 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7889 if (!msg)
7890 return;
7891
7892 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7893 if (!hdr) {
7894 nlmsg_free(msg);
7895 return;
7896 }
7897
7898 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7899 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7900 (from_ap && reason &&
7901 nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7902 (from_ap &&
7903 nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7904 (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7905 goto nla_put_failure;
7906
7907 genlmsg_end(msg, hdr);
7908
7909 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7910 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7911 return;
7912
7913 nla_put_failure:
7914 genlmsg_cancel(msg, hdr);
7915 nlmsg_free(msg);
7916
7917 }
7918
7919 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7920 struct net_device *netdev, const u8 *bssid,
7921 gfp_t gfp)
7922 {
7923 struct sk_buff *msg;
7924 void *hdr;
7925
7926 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7927 if (!msg)
7928 return;
7929
7930 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7931 if (!hdr) {
7932 nlmsg_free(msg);
7933 return;
7934 }
7935
7936 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7937 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7938 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7939 goto nla_put_failure;
7940
7941 genlmsg_end(msg, hdr);
7942
7943 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7944 nl80211_mlme_mcgrp.id, gfp);
7945 return;
7946
7947 nla_put_failure:
7948 genlmsg_cancel(msg, hdr);
7949 nlmsg_free(msg);
7950 }
7951
7952 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7953 struct net_device *netdev,
7954 const u8 *macaddr, const u8* ie, u8 ie_len,
7955 gfp_t gfp)
7956 {
7957 struct sk_buff *msg;
7958 void *hdr;
7959
7960 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7961 if (!msg)
7962 return;
7963
7964 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7965 if (!hdr) {
7966 nlmsg_free(msg);
7967 return;
7968 }
7969
7970 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7971 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7972 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7973 (ie_len && ie &&
7974 nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7975 goto nla_put_failure;
7976
7977 genlmsg_end(msg, hdr);
7978
7979 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7980 nl80211_mlme_mcgrp.id, gfp);
7981 return;
7982
7983 nla_put_failure:
7984 genlmsg_cancel(msg, hdr);
7985 nlmsg_free(msg);
7986 }
7987
7988 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7989 struct net_device *netdev, const u8 *addr,
7990 enum nl80211_key_type key_type, int key_id,
7991 const u8 *tsc, gfp_t gfp)
7992 {
7993 struct sk_buff *msg;
7994 void *hdr;
7995
7996 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7997 if (!msg)
7998 return;
7999
8000 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
8001 if (!hdr) {
8002 nlmsg_free(msg);
8003 return;
8004 }
8005
8006 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8007 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8008 (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
8009 nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
8010 (key_id != -1 &&
8011 nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
8012 (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
8013 goto nla_put_failure;
8014
8015 genlmsg_end(msg, hdr);
8016
8017 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8018 nl80211_mlme_mcgrp.id, gfp);
8019 return;
8020
8021 nla_put_failure:
8022 genlmsg_cancel(msg, hdr);
8023 nlmsg_free(msg);
8024 }
8025
8026 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
8027 struct ieee80211_channel *channel_before,
8028 struct ieee80211_channel *channel_after)
8029 {
8030 struct sk_buff *msg;
8031 void *hdr;
8032 struct nlattr *nl_freq;
8033
8034 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
8035 if (!msg)
8036 return;
8037
8038 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
8039 if (!hdr) {
8040 nlmsg_free(msg);
8041 return;
8042 }
8043
8044 /*
8045 * Since we are applying the beacon hint to a wiphy we know its
8046 * wiphy_idx is valid
8047 */
8048 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
8049 goto nla_put_failure;
8050
8051 /* Before */
8052 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
8053 if (!nl_freq)
8054 goto nla_put_failure;
8055 if (nl80211_msg_put_channel(msg, channel_before))
8056 goto nla_put_failure;
8057 nla_nest_end(msg, nl_freq);
8058
8059 /* After */
8060 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
8061 if (!nl_freq)
8062 goto nla_put_failure;
8063 if (nl80211_msg_put_channel(msg, channel_after))
8064 goto nla_put_failure;
8065 nla_nest_end(msg, nl_freq);
8066
8067 genlmsg_end(msg, hdr);
8068
8069 rcu_read_lock();
8070 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8071 GFP_ATOMIC);
8072 rcu_read_unlock();
8073
8074 return;
8075
8076 nla_put_failure:
8077 genlmsg_cancel(msg, hdr);
8078 nlmsg_free(msg);
8079 }
8080
8081 static void nl80211_send_remain_on_chan_event(
8082 int cmd, struct cfg80211_registered_device *rdev,
8083 struct wireless_dev *wdev, u64 cookie,
8084 struct ieee80211_channel *chan,
8085 enum nl80211_channel_type channel_type,
8086 unsigned int duration, gfp_t gfp)
8087 {
8088 struct sk_buff *msg;
8089 void *hdr;
8090
8091 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8092 if (!msg)
8093 return;
8094
8095 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8096 if (!hdr) {
8097 nlmsg_free(msg);
8098 return;
8099 }
8100
8101 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8102 (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8103 wdev->netdev->ifindex)) ||
8104 nla_put_u32(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
8105 nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
8106 nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
8107 nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8108 goto nla_put_failure;
8109
8110 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
8111 nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
8112 goto nla_put_failure;
8113
8114 genlmsg_end(msg, hdr);
8115
8116 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8117 nl80211_mlme_mcgrp.id, gfp);
8118 return;
8119
8120 nla_put_failure:
8121 genlmsg_cancel(msg, hdr);
8122 nlmsg_free(msg);
8123 }
8124
8125 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
8126 struct wireless_dev *wdev, u64 cookie,
8127 struct ieee80211_channel *chan,
8128 enum nl80211_channel_type channel_type,
8129 unsigned int duration, gfp_t gfp)
8130 {
8131 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
8132 rdev, wdev, cookie, chan,
8133 channel_type, duration, gfp);
8134 }
8135
8136 void nl80211_send_remain_on_channel_cancel(
8137 struct cfg80211_registered_device *rdev,
8138 struct wireless_dev *wdev,
8139 u64 cookie, struct ieee80211_channel *chan,
8140 enum nl80211_channel_type channel_type, gfp_t gfp)
8141 {
8142 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8143 rdev, wdev, cookie, chan,
8144 channel_type, 0, gfp);
8145 }
8146
8147 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8148 struct net_device *dev, const u8 *mac_addr,
8149 struct station_info *sinfo, gfp_t gfp)
8150 {
8151 struct sk_buff *msg;
8152
8153 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8154 if (!msg)
8155 return;
8156
8157 if (nl80211_send_station(msg, 0, 0, 0,
8158 rdev, dev, mac_addr, sinfo) < 0) {
8159 nlmsg_free(msg);
8160 return;
8161 }
8162
8163 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8164 nl80211_mlme_mcgrp.id, gfp);
8165 }
8166
8167 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8168 struct net_device *dev, const u8 *mac_addr,
8169 gfp_t gfp)
8170 {
8171 struct sk_buff *msg;
8172 void *hdr;
8173
8174 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8175 if (!msg)
8176 return;
8177
8178 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8179 if (!hdr) {
8180 nlmsg_free(msg);
8181 return;
8182 }
8183
8184 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8185 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8186 goto nla_put_failure;
8187
8188 genlmsg_end(msg, hdr);
8189
8190 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8191 nl80211_mlme_mcgrp.id, gfp);
8192 return;
8193
8194 nla_put_failure:
8195 genlmsg_cancel(msg, hdr);
8196 nlmsg_free(msg);
8197 }
8198
8199 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8200 const u8 *addr, gfp_t gfp)
8201 {
8202 struct wireless_dev *wdev = dev->ieee80211_ptr;
8203 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8204 struct sk_buff *msg;
8205 void *hdr;
8206 int err;
8207 u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8208
8209 if (!nlpid)
8210 return false;
8211
8212 msg = nlmsg_new(100, gfp);
8213 if (!msg)
8214 return true;
8215
8216 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8217 if (!hdr) {
8218 nlmsg_free(msg);
8219 return true;
8220 }
8221
8222 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8223 nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8224 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8225 goto nla_put_failure;
8226
8227 err = genlmsg_end(msg, hdr);
8228 if (err < 0) {
8229 nlmsg_free(msg);
8230 return true;
8231 }
8232
8233 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8234 return true;
8235
8236 nla_put_failure:
8237 genlmsg_cancel(msg, hdr);
8238 nlmsg_free(msg);
8239 return true;
8240 }
8241
8242 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8243 {
8244 return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8245 addr, gfp);
8246 }
8247
8248 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8249 const u8 *addr, gfp_t gfp)
8250 {
8251 return __nl80211_unexpected_frame(dev,
8252 NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8253 addr, gfp);
8254 }
8255
8256 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8257 struct wireless_dev *wdev, u32 nlpid,
8258 int freq, int sig_dbm,
8259 const u8 *buf, size_t len, gfp_t gfp)
8260 {
8261 struct net_device *netdev = wdev->netdev;
8262 struct sk_buff *msg;
8263 void *hdr;
8264
8265 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8266 if (!msg)
8267 return -ENOMEM;
8268
8269 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8270 if (!hdr) {
8271 nlmsg_free(msg);
8272 return -ENOMEM;
8273 }
8274
8275 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8276 (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8277 netdev->ifindex)) ||
8278 nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8279 (sig_dbm &&
8280 nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8281 nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8282 goto nla_put_failure;
8283
8284 genlmsg_end(msg, hdr);
8285
8286 return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8287
8288 nla_put_failure:
8289 genlmsg_cancel(msg, hdr);
8290 nlmsg_free(msg);
8291 return -ENOBUFS;
8292 }
8293
8294 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8295 struct wireless_dev *wdev, u64 cookie,
8296 const u8 *buf, size_t len, bool ack,
8297 gfp_t gfp)
8298 {
8299 struct net_device *netdev = wdev->netdev;
8300 struct sk_buff *msg;
8301 void *hdr;
8302
8303 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8304 if (!msg)
8305 return;
8306
8307 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8308 if (!hdr) {
8309 nlmsg_free(msg);
8310 return;
8311 }
8312
8313 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8314 (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8315 netdev->ifindex)) ||
8316 nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8317 nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8318 (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8319 goto nla_put_failure;
8320
8321 genlmsg_end(msg, hdr);
8322
8323 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8324 return;
8325
8326 nla_put_failure:
8327 genlmsg_cancel(msg, hdr);
8328 nlmsg_free(msg);
8329 }
8330
8331 void
8332 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8333 struct net_device *netdev,
8334 enum nl80211_cqm_rssi_threshold_event rssi_event,
8335 gfp_t gfp)
8336 {
8337 struct sk_buff *msg;
8338 struct nlattr *pinfoattr;
8339 void *hdr;
8340
8341 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8342 if (!msg)
8343 return;
8344
8345 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8346 if (!hdr) {
8347 nlmsg_free(msg);
8348 return;
8349 }
8350
8351 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8352 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8353 goto nla_put_failure;
8354
8355 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8356 if (!pinfoattr)
8357 goto nla_put_failure;
8358
8359 if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8360 rssi_event))
8361 goto nla_put_failure;
8362
8363 nla_nest_end(msg, pinfoattr);
8364
8365 genlmsg_end(msg, hdr);
8366
8367 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8368 nl80211_mlme_mcgrp.id, gfp);
8369 return;
8370
8371 nla_put_failure:
8372 genlmsg_cancel(msg, hdr);
8373 nlmsg_free(msg);
8374 }
8375
8376 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8377 struct net_device *netdev, const u8 *bssid,
8378 const u8 *replay_ctr, gfp_t gfp)
8379 {
8380 struct sk_buff *msg;
8381 struct nlattr *rekey_attr;
8382 void *hdr;
8383
8384 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8385 if (!msg)
8386 return;
8387
8388 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8389 if (!hdr) {
8390 nlmsg_free(msg);
8391 return;
8392 }
8393
8394 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8395 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8396 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8397 goto nla_put_failure;
8398
8399 rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8400 if (!rekey_attr)
8401 goto nla_put_failure;
8402
8403 if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8404 NL80211_REPLAY_CTR_LEN, replay_ctr))
8405 goto nla_put_failure;
8406
8407 nla_nest_end(msg, rekey_attr);
8408
8409 genlmsg_end(msg, hdr);
8410
8411 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8412 nl80211_mlme_mcgrp.id, gfp);
8413 return;
8414
8415 nla_put_failure:
8416 genlmsg_cancel(msg, hdr);
8417 nlmsg_free(msg);
8418 }
8419
8420 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8421 struct net_device *netdev, int index,
8422 const u8 *bssid, bool preauth, gfp_t gfp)
8423 {
8424 struct sk_buff *msg;
8425 struct nlattr *attr;
8426 void *hdr;
8427
8428 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8429 if (!msg)
8430 return;
8431
8432 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8433 if (!hdr) {
8434 nlmsg_free(msg);
8435 return;
8436 }
8437
8438 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8439 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8440 goto nla_put_failure;
8441
8442 attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8443 if (!attr)
8444 goto nla_put_failure;
8445
8446 if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8447 nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8448 (preauth &&
8449 nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8450 goto nla_put_failure;
8451
8452 nla_nest_end(msg, attr);
8453
8454 genlmsg_end(msg, hdr);
8455
8456 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8457 nl80211_mlme_mcgrp.id, gfp);
8458 return;
8459
8460 nla_put_failure:
8461 genlmsg_cancel(msg, hdr);
8462 nlmsg_free(msg);
8463 }
8464
8465 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8466 struct net_device *netdev, int freq,
8467 enum nl80211_channel_type type, gfp_t gfp)
8468 {
8469 struct sk_buff *msg;
8470 void *hdr;
8471
8472 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8473 if (!msg)
8474 return;
8475
8476 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8477 if (!hdr) {
8478 nlmsg_free(msg);
8479 return;
8480 }
8481
8482 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8483 nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8484 nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8485 goto nla_put_failure;
8486
8487 genlmsg_end(msg, hdr);
8488
8489 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8490 nl80211_mlme_mcgrp.id, gfp);
8491 return;
8492
8493 nla_put_failure:
8494 genlmsg_cancel(msg, hdr);
8495 nlmsg_free(msg);
8496 }
8497
8498 void
8499 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8500 struct net_device *netdev, const u8 *peer,
8501 u32 num_packets, gfp_t gfp)
8502 {
8503 struct sk_buff *msg;
8504 struct nlattr *pinfoattr;
8505 void *hdr;
8506
8507 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8508 if (!msg)
8509 return;
8510
8511 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8512 if (!hdr) {
8513 nlmsg_free(msg);
8514 return;
8515 }
8516
8517 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8518 nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8519 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8520 goto nla_put_failure;
8521
8522 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8523 if (!pinfoattr)
8524 goto nla_put_failure;
8525
8526 if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8527 goto nla_put_failure;
8528
8529 nla_nest_end(msg, pinfoattr);
8530
8531 genlmsg_end(msg, hdr);
8532
8533 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8534 nl80211_mlme_mcgrp.id, gfp);
8535 return;
8536
8537 nla_put_failure:
8538 genlmsg_cancel(msg, hdr);
8539 nlmsg_free(msg);
8540 }
8541
8542 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8543 u64 cookie, bool acked, gfp_t gfp)
8544 {
8545 struct wireless_dev *wdev = dev->ieee80211_ptr;
8546 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8547 struct sk_buff *msg;
8548 void *hdr;
8549 int err;
8550
8551 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8552 if (!msg)
8553 return;
8554
8555 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8556 if (!hdr) {
8557 nlmsg_free(msg);
8558 return;
8559 }
8560
8561 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8562 nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8563 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8564 nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8565 (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8566 goto nla_put_failure;
8567
8568 err = genlmsg_end(msg, hdr);
8569 if (err < 0) {
8570 nlmsg_free(msg);
8571 return;
8572 }
8573
8574 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8575 nl80211_mlme_mcgrp.id, gfp);
8576 return;
8577
8578 nla_put_failure:
8579 genlmsg_cancel(msg, hdr);
8580 nlmsg_free(msg);
8581 }
8582 EXPORT_SYMBOL(cfg80211_probe_status);
8583
8584 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8585 const u8 *frame, size_t len,
8586 int freq, int sig_dbm, gfp_t gfp)
8587 {
8588 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8589 struct sk_buff *msg;
8590 void *hdr;
8591 u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8592
8593 if (!nlpid)
8594 return;
8595
8596 msg = nlmsg_new(len + 100, gfp);
8597 if (!msg)
8598 return;
8599
8600 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8601 if (!hdr) {
8602 nlmsg_free(msg);
8603 return;
8604 }
8605
8606 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8607 (freq &&
8608 nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8609 (sig_dbm &&
8610 nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8611 nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8612 goto nla_put_failure;
8613
8614 genlmsg_end(msg, hdr);
8615
8616 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8617 return;
8618
8619 nla_put_failure:
8620 genlmsg_cancel(msg, hdr);
8621 nlmsg_free(msg);
8622 }
8623 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8624
8625 static int nl80211_netlink_notify(struct notifier_block * nb,
8626 unsigned long state,
8627 void *_notify)
8628 {
8629 struct netlink_notify *notify = _notify;
8630 struct cfg80211_registered_device *rdev;
8631 struct wireless_dev *wdev;
8632
8633 if (state != NETLINK_URELEASE)
8634 return NOTIFY_DONE;
8635
8636 rcu_read_lock();
8637
8638 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8639 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
8640 cfg80211_mlme_unregister_socket(wdev, notify->pid);
8641 if (rdev->ap_beacons_nlpid == notify->pid)
8642 rdev->ap_beacons_nlpid = 0;
8643 }
8644
8645 rcu_read_unlock();
8646
8647 return NOTIFY_DONE;
8648 }
8649
8650 static struct notifier_block nl80211_netlink_notifier = {
8651 .notifier_call = nl80211_netlink_notify,
8652 };
8653
8654 /* initialisation/exit functions */
8655
8656 int nl80211_init(void)
8657 {
8658 int err;
8659
8660 err = genl_register_family_with_ops(&nl80211_fam,
8661 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8662 if (err)
8663 return err;
8664
8665 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8666 if (err)
8667 goto err_out;
8668
8669 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8670 if (err)
8671 goto err_out;
8672
8673 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8674 if (err)
8675 goto err_out;
8676
8677 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8678 if (err)
8679 goto err_out;
8680
8681 #ifdef CONFIG_NL80211_TESTMODE
8682 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8683 if (err)
8684 goto err_out;
8685 #endif
8686
8687 err = netlink_register_notifier(&nl80211_netlink_notifier);
8688 if (err)
8689 goto err_out;
8690
8691 return 0;
8692 err_out:
8693 genl_unregister_family(&nl80211_fam);
8694 return err;
8695 }
8696
8697 void nl80211_exit(void)
8698 {
8699 netlink_unregister_notifier(&nl80211_netlink_notifier);
8700 genl_unregister_family(&nl80211_fam);
8701 }
Linux kernel - Deliverables
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