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nl80211: advertise maximum remain-on-channel duration
[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 int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
27 struct genl_info *info);
28 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
29 struct genl_info *info);
30
31 /* the netlink family */
32 static struct genl_family nl80211_fam = {
33 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
34 .name = "nl80211", /* have users key off the name instead */
35 .hdrsize = 0, /* no private header */
36 .version = 1, /* no particular meaning now */
37 .maxattr = NL80211_ATTR_MAX,
38 .netnsok = true,
39 .pre_doit = nl80211_pre_doit,
40 .post_doit = nl80211_post_doit,
41 };
42
43 /* internal helper: get rdev and dev */
44 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
45 struct cfg80211_registered_device **rdev,
46 struct net_device **dev)
47 {
48 struct nlattr **attrs = info->attrs;
49 int ifindex;
50
51 if (!attrs[NL80211_ATTR_IFINDEX])
52 return -EINVAL;
53
54 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
55 *dev = dev_get_by_index(genl_info_net(info), ifindex);
56 if (!*dev)
57 return -ENODEV;
58
59 *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
60 if (IS_ERR(*rdev)) {
61 dev_put(*dev);
62 return PTR_ERR(*rdev);
63 }
64
65 return 0;
66 }
67
68 /* policy for the attributes */
69 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
70 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
71 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
72 .len = 20-1 },
73 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
74 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
75 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
76 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
77 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
78 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
79 [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
80 [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
81
82 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
83 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
84 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
85
86 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
87 [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
88
89 [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
90 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
91 .len = WLAN_MAX_KEY_LEN },
92 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
93 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
94 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
95 [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
96 [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
97
98 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
99 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
100 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
101 .len = IEEE80211_MAX_DATA_LEN },
102 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
103 .len = IEEE80211_MAX_DATA_LEN },
104 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
105 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
106 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
107 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
108 .len = NL80211_MAX_SUPP_RATES },
109 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
110 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
111 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
112 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
113 .len = IEEE80211_MAX_MESH_ID_LEN },
114 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
115
116 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
117 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
118
119 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
120 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
121 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
122 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
123 .len = NL80211_MAX_SUPP_RATES },
124 [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
125
126 [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
127
128 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
129 .len = NL80211_HT_CAPABILITY_LEN },
130
131 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
132 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
133 .len = IEEE80211_MAX_DATA_LEN },
134 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
135 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
136
137 [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
138 .len = IEEE80211_MAX_SSID_LEN },
139 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
140 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
141 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
142 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
143 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
144 [NL80211_ATTR_STA_FLAGS2] = {
145 .len = sizeof(struct nl80211_sta_flag_update),
146 },
147 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
148 [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
149 [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
150 [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
151 [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
152 [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
153 [NL80211_ATTR_PID] = { .type = NLA_U32 },
154 [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
155 [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
156 .len = WLAN_PMKID_LEN },
157 [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
158 [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
159 [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
160 [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
161 .len = IEEE80211_MAX_DATA_LEN },
162 [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
163 [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
164 [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
165 [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
166 [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
167 [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
168 [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
169 [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
170 [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
171 [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
172 [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
173 [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
174 [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
175 };
176
177 /* policy for the key attributes */
178 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
179 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
180 [NL80211_KEY_IDX] = { .type = NLA_U8 },
181 [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
182 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
183 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
184 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
185 [NL80211_KEY_TYPE] = { .type = NLA_U32 },
186 [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
187 };
188
189 /* policy for the key default flags */
190 static const struct nla_policy
191 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
192 [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
193 [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
194 };
195
196 /* ifidx get helper */
197 static int nl80211_get_ifidx(struct netlink_callback *cb)
198 {
199 int res;
200
201 res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
202 nl80211_fam.attrbuf, nl80211_fam.maxattr,
203 nl80211_policy);
204 if (res)
205 return res;
206
207 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
208 return -EINVAL;
209
210 res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
211 if (!res)
212 return -EINVAL;
213 return res;
214 }
215
216 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
217 struct netlink_callback *cb,
218 struct cfg80211_registered_device **rdev,
219 struct net_device **dev)
220 {
221 int ifidx = cb->args[0];
222 int err;
223
224 if (!ifidx)
225 ifidx = nl80211_get_ifidx(cb);
226 if (ifidx < 0)
227 return ifidx;
228
229 cb->args[0] = ifidx;
230
231 rtnl_lock();
232
233 *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
234 if (!*dev) {
235 err = -ENODEV;
236 goto out_rtnl;
237 }
238
239 *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
240 if (IS_ERR(*rdev)) {
241 err = PTR_ERR(*rdev);
242 goto out_rtnl;
243 }
244
245 return 0;
246 out_rtnl:
247 rtnl_unlock();
248 return err;
249 }
250
251 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
252 {
253 cfg80211_unlock_rdev(rdev);
254 rtnl_unlock();
255 }
256
257 /* IE validation */
258 static bool is_valid_ie_attr(const struct nlattr *attr)
259 {
260 const u8 *pos;
261 int len;
262
263 if (!attr)
264 return true;
265
266 pos = nla_data(attr);
267 len = nla_len(attr);
268
269 while (len) {
270 u8 elemlen;
271
272 if (len < 2)
273 return false;
274 len -= 2;
275
276 elemlen = pos[1];
277 if (elemlen > len)
278 return false;
279
280 len -= elemlen;
281 pos += 2 + elemlen;
282 }
283
284 return true;
285 }
286
287 /* message building helper */
288 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
289 int flags, u8 cmd)
290 {
291 /* since there is no private header just add the generic one */
292 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
293 }
294
295 static int nl80211_msg_put_channel(struct sk_buff *msg,
296 struct ieee80211_channel *chan)
297 {
298 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
299 chan->center_freq);
300
301 if (chan->flags & IEEE80211_CHAN_DISABLED)
302 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
303 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
304 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
305 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
306 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
307 if (chan->flags & IEEE80211_CHAN_RADAR)
308 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
309
310 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
311 DBM_TO_MBM(chan->max_power));
312
313 return 0;
314
315 nla_put_failure:
316 return -ENOBUFS;
317 }
318
319 /* netlink command implementations */
320
321 struct key_parse {
322 struct key_params p;
323 int idx;
324 int type;
325 bool def, defmgmt;
326 bool def_uni, def_multi;
327 };
328
329 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
330 {
331 struct nlattr *tb[NL80211_KEY_MAX + 1];
332 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
333 nl80211_key_policy);
334 if (err)
335 return err;
336
337 k->def = !!tb[NL80211_KEY_DEFAULT];
338 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
339
340 if (k->def) {
341 k->def_uni = true;
342 k->def_multi = true;
343 }
344 if (k->defmgmt)
345 k->def_multi = true;
346
347 if (tb[NL80211_KEY_IDX])
348 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
349
350 if (tb[NL80211_KEY_DATA]) {
351 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
352 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
353 }
354
355 if (tb[NL80211_KEY_SEQ]) {
356 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
357 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
358 }
359
360 if (tb[NL80211_KEY_CIPHER])
361 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
362
363 if (tb[NL80211_KEY_TYPE]) {
364 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
365 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
366 return -EINVAL;
367 }
368
369 if (tb[NL80211_KEY_DEFAULT_TYPES]) {
370 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
371 int err = nla_parse_nested(kdt,
372 NUM_NL80211_KEY_DEFAULT_TYPES - 1,
373 tb[NL80211_KEY_DEFAULT_TYPES],
374 nl80211_key_default_policy);
375 if (err)
376 return err;
377
378 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
379 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
380 }
381
382 return 0;
383 }
384
385 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
386 {
387 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
388 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
389 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
390 }
391
392 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
393 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
394 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
395 }
396
397 if (info->attrs[NL80211_ATTR_KEY_IDX])
398 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
399
400 if (info->attrs[NL80211_ATTR_KEY_CIPHER])
401 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
402
403 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
404 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
405
406 if (k->def) {
407 k->def_uni = true;
408 k->def_multi = true;
409 }
410 if (k->defmgmt)
411 k->def_multi = true;
412
413 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
414 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
415 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
416 return -EINVAL;
417 }
418
419 if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
420 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
421 int err = nla_parse_nested(
422 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
423 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
424 nl80211_key_default_policy);
425 if (err)
426 return err;
427
428 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
429 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
430 }
431
432 return 0;
433 }
434
435 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
436 {
437 int err;
438
439 memset(k, 0, sizeof(*k));
440 k->idx = -1;
441 k->type = -1;
442
443 if (info->attrs[NL80211_ATTR_KEY])
444 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
445 else
446 err = nl80211_parse_key_old(info, k);
447
448 if (err)
449 return err;
450
451 if (k->def && k->defmgmt)
452 return -EINVAL;
453
454 if (k->defmgmt) {
455 if (k->def_uni || !k->def_multi)
456 return -EINVAL;
457 }
458
459 if (k->idx != -1) {
460 if (k->defmgmt) {
461 if (k->idx < 4 || k->idx > 5)
462 return -EINVAL;
463 } else if (k->def) {
464 if (k->idx < 0 || k->idx > 3)
465 return -EINVAL;
466 } else {
467 if (k->idx < 0 || k->idx > 5)
468 return -EINVAL;
469 }
470 }
471
472 return 0;
473 }
474
475 static struct cfg80211_cached_keys *
476 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
477 struct nlattr *keys)
478 {
479 struct key_parse parse;
480 struct nlattr *key;
481 struct cfg80211_cached_keys *result;
482 int rem, err, def = 0;
483
484 result = kzalloc(sizeof(*result), GFP_KERNEL);
485 if (!result)
486 return ERR_PTR(-ENOMEM);
487
488 result->def = -1;
489 result->defmgmt = -1;
490
491 nla_for_each_nested(key, keys, rem) {
492 memset(&parse, 0, sizeof(parse));
493 parse.idx = -1;
494
495 err = nl80211_parse_key_new(key, &parse);
496 if (err)
497 goto error;
498 err = -EINVAL;
499 if (!parse.p.key)
500 goto error;
501 if (parse.idx < 0 || parse.idx > 4)
502 goto error;
503 if (parse.def) {
504 if (def)
505 goto error;
506 def = 1;
507 result->def = parse.idx;
508 if (!parse.def_uni || !parse.def_multi)
509 goto error;
510 } else if (parse.defmgmt)
511 goto error;
512 err = cfg80211_validate_key_settings(rdev, &parse.p,
513 parse.idx, false, NULL);
514 if (err)
515 goto error;
516 result->params[parse.idx].cipher = parse.p.cipher;
517 result->params[parse.idx].key_len = parse.p.key_len;
518 result->params[parse.idx].key = result->data[parse.idx];
519 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
520 }
521
522 return result;
523 error:
524 kfree(result);
525 return ERR_PTR(err);
526 }
527
528 static int nl80211_key_allowed(struct wireless_dev *wdev)
529 {
530 ASSERT_WDEV_LOCK(wdev);
531
532 switch (wdev->iftype) {
533 case NL80211_IFTYPE_AP:
534 case NL80211_IFTYPE_AP_VLAN:
535 case NL80211_IFTYPE_P2P_GO:
536 break;
537 case NL80211_IFTYPE_ADHOC:
538 if (!wdev->current_bss)
539 return -ENOLINK;
540 break;
541 case NL80211_IFTYPE_STATION:
542 case NL80211_IFTYPE_P2P_CLIENT:
543 if (wdev->sme_state != CFG80211_SME_CONNECTED)
544 return -ENOLINK;
545 break;
546 default:
547 return -EINVAL;
548 }
549
550 return 0;
551 }
552
553 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
554 struct cfg80211_registered_device *dev)
555 {
556 void *hdr;
557 struct nlattr *nl_bands, *nl_band;
558 struct nlattr *nl_freqs, *nl_freq;
559 struct nlattr *nl_rates, *nl_rate;
560 struct nlattr *nl_modes;
561 struct nlattr *nl_cmds;
562 enum ieee80211_band band;
563 struct ieee80211_channel *chan;
564 struct ieee80211_rate *rate;
565 int i;
566 u16 ifmodes = dev->wiphy.interface_modes;
567 const struct ieee80211_txrx_stypes *mgmt_stypes =
568 dev->wiphy.mgmt_stypes;
569
570 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
571 if (!hdr)
572 return -1;
573
574 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
575 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
576
577 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
578 cfg80211_rdev_list_generation);
579
580 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
581 dev->wiphy.retry_short);
582 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
583 dev->wiphy.retry_long);
584 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
585 dev->wiphy.frag_threshold);
586 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
587 dev->wiphy.rts_threshold);
588 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
589 dev->wiphy.coverage_class);
590 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
591 dev->wiphy.max_scan_ssids);
592 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
593 dev->wiphy.max_scan_ie_len);
594
595 if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
596 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
597
598 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
599 sizeof(u32) * dev->wiphy.n_cipher_suites,
600 dev->wiphy.cipher_suites);
601
602 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
603 dev->wiphy.max_num_pmkids);
604
605 if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
606 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
607
608 if (dev->wiphy.available_antennas && dev->ops->get_antenna) {
609 u32 tx_ant = 0, rx_ant = 0;
610 int res;
611 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
612 if (!res) {
613 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
614 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
615 }
616 }
617
618 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
619 if (!nl_modes)
620 goto nla_put_failure;
621
622 i = 0;
623 while (ifmodes) {
624 if (ifmodes & 1)
625 NLA_PUT_FLAG(msg, i);
626 ifmodes >>= 1;
627 i++;
628 }
629
630 nla_nest_end(msg, nl_modes);
631
632 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
633 if (!nl_bands)
634 goto nla_put_failure;
635
636 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
637 if (!dev->wiphy.bands[band])
638 continue;
639
640 nl_band = nla_nest_start(msg, band);
641 if (!nl_band)
642 goto nla_put_failure;
643
644 /* add HT info */
645 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
646 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
647 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
648 &dev->wiphy.bands[band]->ht_cap.mcs);
649 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
650 dev->wiphy.bands[band]->ht_cap.cap);
651 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
652 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
653 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
654 dev->wiphy.bands[band]->ht_cap.ampdu_density);
655 }
656
657 /* add frequencies */
658 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
659 if (!nl_freqs)
660 goto nla_put_failure;
661
662 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
663 nl_freq = nla_nest_start(msg, i);
664 if (!nl_freq)
665 goto nla_put_failure;
666
667 chan = &dev->wiphy.bands[band]->channels[i];
668
669 if (nl80211_msg_put_channel(msg, chan))
670 goto nla_put_failure;
671
672 nla_nest_end(msg, nl_freq);
673 }
674
675 nla_nest_end(msg, nl_freqs);
676
677 /* add bitrates */
678 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
679 if (!nl_rates)
680 goto nla_put_failure;
681
682 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
683 nl_rate = nla_nest_start(msg, i);
684 if (!nl_rate)
685 goto nla_put_failure;
686
687 rate = &dev->wiphy.bands[band]->bitrates[i];
688 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
689 rate->bitrate);
690 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
691 NLA_PUT_FLAG(msg,
692 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
693
694 nla_nest_end(msg, nl_rate);
695 }
696
697 nla_nest_end(msg, nl_rates);
698
699 nla_nest_end(msg, nl_band);
700 }
701 nla_nest_end(msg, nl_bands);
702
703 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
704 if (!nl_cmds)
705 goto nla_put_failure;
706
707 i = 0;
708 #define CMD(op, n) \
709 do { \
710 if (dev->ops->op) { \
711 i++; \
712 NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
713 } \
714 } while (0)
715
716 CMD(add_virtual_intf, NEW_INTERFACE);
717 CMD(change_virtual_intf, SET_INTERFACE);
718 CMD(add_key, NEW_KEY);
719 CMD(add_beacon, NEW_BEACON);
720 CMD(add_station, NEW_STATION);
721 CMD(add_mpath, NEW_MPATH);
722 CMD(update_mesh_params, SET_MESH_PARAMS);
723 CMD(change_bss, SET_BSS);
724 CMD(auth, AUTHENTICATE);
725 CMD(assoc, ASSOCIATE);
726 CMD(deauth, DEAUTHENTICATE);
727 CMD(disassoc, DISASSOCIATE);
728 CMD(join_ibss, JOIN_IBSS);
729 CMD(join_mesh, JOIN_MESH);
730 CMD(set_pmksa, SET_PMKSA);
731 CMD(del_pmksa, DEL_PMKSA);
732 CMD(flush_pmksa, FLUSH_PMKSA);
733 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
734 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
735 CMD(mgmt_tx, FRAME);
736 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
737 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
738 i++;
739 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
740 }
741 CMD(set_channel, SET_CHANNEL);
742 CMD(set_wds_peer, SET_WDS_PEER);
743
744 #undef CMD
745
746 if (dev->ops->connect || dev->ops->auth) {
747 i++;
748 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
749 }
750
751 if (dev->ops->disconnect || dev->ops->deauth) {
752 i++;
753 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
754 }
755
756 nla_nest_end(msg, nl_cmds);
757
758 if (dev->ops->remain_on_channel)
759 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
760 dev->wiphy.max_remain_on_channel_duration);
761
762 /* for now at least assume all drivers have it */
763 if (dev->ops->mgmt_tx)
764 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
765
766 if (mgmt_stypes) {
767 u16 stypes;
768 struct nlattr *nl_ftypes, *nl_ifs;
769 enum nl80211_iftype ift;
770
771 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
772 if (!nl_ifs)
773 goto nla_put_failure;
774
775 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
776 nl_ftypes = nla_nest_start(msg, ift);
777 if (!nl_ftypes)
778 goto nla_put_failure;
779 i = 0;
780 stypes = mgmt_stypes[ift].tx;
781 while (stypes) {
782 if (stypes & 1)
783 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
784 (i << 4) | IEEE80211_FTYPE_MGMT);
785 stypes >>= 1;
786 i++;
787 }
788 nla_nest_end(msg, nl_ftypes);
789 }
790
791 nla_nest_end(msg, nl_ifs);
792
793 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
794 if (!nl_ifs)
795 goto nla_put_failure;
796
797 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
798 nl_ftypes = nla_nest_start(msg, ift);
799 if (!nl_ftypes)
800 goto nla_put_failure;
801 i = 0;
802 stypes = mgmt_stypes[ift].rx;
803 while (stypes) {
804 if (stypes & 1)
805 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
806 (i << 4) | IEEE80211_FTYPE_MGMT);
807 stypes >>= 1;
808 i++;
809 }
810 nla_nest_end(msg, nl_ftypes);
811 }
812 nla_nest_end(msg, nl_ifs);
813 }
814
815 return genlmsg_end(msg, hdr);
816
817 nla_put_failure:
818 genlmsg_cancel(msg, hdr);
819 return -EMSGSIZE;
820 }
821
822 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
823 {
824 int idx = 0;
825 int start = cb->args[0];
826 struct cfg80211_registered_device *dev;
827
828 mutex_lock(&cfg80211_mutex);
829 list_for_each_entry(dev, &cfg80211_rdev_list, list) {
830 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
831 continue;
832 if (++idx <= start)
833 continue;
834 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
835 cb->nlh->nlmsg_seq, NLM_F_MULTI,
836 dev) < 0) {
837 idx--;
838 break;
839 }
840 }
841 mutex_unlock(&cfg80211_mutex);
842
843 cb->args[0] = idx;
844
845 return skb->len;
846 }
847
848 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
849 {
850 struct sk_buff *msg;
851 struct cfg80211_registered_device *dev = info->user_ptr[0];
852
853 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
854 if (!msg)
855 return -ENOMEM;
856
857 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
858 nlmsg_free(msg);
859 return -ENOBUFS;
860 }
861
862 return genlmsg_reply(msg, info);
863 }
864
865 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
866 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
867 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
868 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
869 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
870 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
871 };
872
873 static int parse_txq_params(struct nlattr *tb[],
874 struct ieee80211_txq_params *txq_params)
875 {
876 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
877 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
878 !tb[NL80211_TXQ_ATTR_AIFS])
879 return -EINVAL;
880
881 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
882 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
883 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
884 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
885 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
886
887 return 0;
888 }
889
890 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
891 {
892 /*
893 * You can only set the channel explicitly for AP, mesh
894 * and WDS type interfaces; all others have their channel
895 * managed via their respective "establish a connection"
896 * command (connect, join, ...)
897 *
898 * Monitors are special as they are normally slaved to
899 * whatever else is going on, so they behave as though
900 * you tried setting the wiphy channel itself.
901 */
902 return !wdev ||
903 wdev->iftype == NL80211_IFTYPE_AP ||
904 wdev->iftype == NL80211_IFTYPE_WDS ||
905 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
906 wdev->iftype == NL80211_IFTYPE_MONITOR ||
907 wdev->iftype == NL80211_IFTYPE_P2P_GO;
908 }
909
910 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
911 struct wireless_dev *wdev,
912 struct genl_info *info)
913 {
914 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
915 u32 freq;
916 int result;
917
918 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
919 return -EINVAL;
920
921 if (!nl80211_can_set_dev_channel(wdev))
922 return -EOPNOTSUPP;
923
924 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
925 channel_type = nla_get_u32(info->attrs[
926 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
927 if (channel_type != NL80211_CHAN_NO_HT &&
928 channel_type != NL80211_CHAN_HT20 &&
929 channel_type != NL80211_CHAN_HT40PLUS &&
930 channel_type != NL80211_CHAN_HT40MINUS)
931 return -EINVAL;
932 }
933
934 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
935
936 mutex_lock(&rdev->devlist_mtx);
937 if (wdev) {
938 wdev_lock(wdev);
939 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
940 wdev_unlock(wdev);
941 } else {
942 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
943 }
944 mutex_unlock(&rdev->devlist_mtx);
945
946 return result;
947 }
948
949 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
950 {
951 struct cfg80211_registered_device *rdev = info->user_ptr[0];
952 struct net_device *netdev = info->user_ptr[1];
953
954 return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
955 }
956
957 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
958 {
959 struct cfg80211_registered_device *rdev = info->user_ptr[0];
960 struct net_device *dev = info->user_ptr[1];
961 struct wireless_dev *wdev = dev->ieee80211_ptr;
962 const u8 *bssid;
963
964 if (!info->attrs[NL80211_ATTR_MAC])
965 return -EINVAL;
966
967 if (netif_running(dev))
968 return -EBUSY;
969
970 if (!rdev->ops->set_wds_peer)
971 return -EOPNOTSUPP;
972
973 if (wdev->iftype != NL80211_IFTYPE_WDS)
974 return -EOPNOTSUPP;
975
976 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
977 return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
978 }
979
980
981 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
982 {
983 struct cfg80211_registered_device *rdev;
984 struct net_device *netdev = NULL;
985 struct wireless_dev *wdev;
986 int result = 0, rem_txq_params = 0;
987 struct nlattr *nl_txq_params;
988 u32 changed;
989 u8 retry_short = 0, retry_long = 0;
990 u32 frag_threshold = 0, rts_threshold = 0;
991 u8 coverage_class = 0;
992
993 /*
994 * Try to find the wiphy and netdev. Normally this
995 * function shouldn't need the netdev, but this is
996 * done for backward compatibility -- previously
997 * setting the channel was done per wiphy, but now
998 * it is per netdev. Previous userland like hostapd
999 * also passed a netdev to set_wiphy, so that it is
1000 * possible to let that go to the right netdev!
1001 */
1002 mutex_lock(&cfg80211_mutex);
1003
1004 if (info->attrs[NL80211_ATTR_IFINDEX]) {
1005 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1006
1007 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1008 if (netdev && netdev->ieee80211_ptr) {
1009 rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1010 mutex_lock(&rdev->mtx);
1011 } else
1012 netdev = NULL;
1013 }
1014
1015 if (!netdev) {
1016 rdev = __cfg80211_rdev_from_info(info);
1017 if (IS_ERR(rdev)) {
1018 mutex_unlock(&cfg80211_mutex);
1019 return PTR_ERR(rdev);
1020 }
1021 wdev = NULL;
1022 netdev = NULL;
1023 result = 0;
1024
1025 mutex_lock(&rdev->mtx);
1026 } else if (netif_running(netdev) &&
1027 nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1028 wdev = netdev->ieee80211_ptr;
1029 else
1030 wdev = NULL;
1031
1032 /*
1033 * end workaround code, by now the rdev is available
1034 * and locked, and wdev may or may not be NULL.
1035 */
1036
1037 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1038 result = cfg80211_dev_rename(
1039 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1040
1041 mutex_unlock(&cfg80211_mutex);
1042
1043 if (result)
1044 goto bad_res;
1045
1046 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1047 struct ieee80211_txq_params txq_params;
1048 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1049
1050 if (!rdev->ops->set_txq_params) {
1051 result = -EOPNOTSUPP;
1052 goto bad_res;
1053 }
1054
1055 nla_for_each_nested(nl_txq_params,
1056 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1057 rem_txq_params) {
1058 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1059 nla_data(nl_txq_params),
1060 nla_len(nl_txq_params),
1061 txq_params_policy);
1062 result = parse_txq_params(tb, &txq_params);
1063 if (result)
1064 goto bad_res;
1065
1066 result = rdev->ops->set_txq_params(&rdev->wiphy,
1067 &txq_params);
1068 if (result)
1069 goto bad_res;
1070 }
1071 }
1072
1073 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1074 result = __nl80211_set_channel(rdev, wdev, info);
1075 if (result)
1076 goto bad_res;
1077 }
1078
1079 if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1080 enum nl80211_tx_power_setting type;
1081 int idx, mbm = 0;
1082
1083 if (!rdev->ops->set_tx_power) {
1084 result = -EOPNOTSUPP;
1085 goto bad_res;
1086 }
1087
1088 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1089 type = nla_get_u32(info->attrs[idx]);
1090
1091 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1092 (type != NL80211_TX_POWER_AUTOMATIC)) {
1093 result = -EINVAL;
1094 goto bad_res;
1095 }
1096
1097 if (type != NL80211_TX_POWER_AUTOMATIC) {
1098 idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1099 mbm = nla_get_u32(info->attrs[idx]);
1100 }
1101
1102 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1103 if (result)
1104 goto bad_res;
1105 }
1106
1107 if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1108 info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1109 u32 tx_ant, rx_ant;
1110 if (!rdev->wiphy.available_antennas || !rdev->ops->set_antenna) {
1111 result = -EOPNOTSUPP;
1112 goto bad_res;
1113 }
1114
1115 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1116 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1117
1118 /* reject antenna configurations which don't match the
1119 * available antenna mask, except for the "all" mask */
1120 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas)) ||
1121 (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas))) {
1122 result = -EINVAL;
1123 goto bad_res;
1124 }
1125
1126 tx_ant = tx_ant & rdev->wiphy.available_antennas;
1127 rx_ant = rx_ant & rdev->wiphy.available_antennas;
1128
1129 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1130 if (result)
1131 goto bad_res;
1132 }
1133
1134 changed = 0;
1135
1136 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1137 retry_short = nla_get_u8(
1138 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1139 if (retry_short == 0) {
1140 result = -EINVAL;
1141 goto bad_res;
1142 }
1143 changed |= WIPHY_PARAM_RETRY_SHORT;
1144 }
1145
1146 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1147 retry_long = nla_get_u8(
1148 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1149 if (retry_long == 0) {
1150 result = -EINVAL;
1151 goto bad_res;
1152 }
1153 changed |= WIPHY_PARAM_RETRY_LONG;
1154 }
1155
1156 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1157 frag_threshold = nla_get_u32(
1158 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1159 if (frag_threshold < 256) {
1160 result = -EINVAL;
1161 goto bad_res;
1162 }
1163 if (frag_threshold != (u32) -1) {
1164 /*
1165 * Fragments (apart from the last one) are required to
1166 * have even length. Make the fragmentation code
1167 * simpler by stripping LSB should someone try to use
1168 * odd threshold value.
1169 */
1170 frag_threshold &= ~0x1;
1171 }
1172 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1173 }
1174
1175 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1176 rts_threshold = nla_get_u32(
1177 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1178 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1179 }
1180
1181 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1182 coverage_class = nla_get_u8(
1183 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1184 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1185 }
1186
1187 if (changed) {
1188 u8 old_retry_short, old_retry_long;
1189 u32 old_frag_threshold, old_rts_threshold;
1190 u8 old_coverage_class;
1191
1192 if (!rdev->ops->set_wiphy_params) {
1193 result = -EOPNOTSUPP;
1194 goto bad_res;
1195 }
1196
1197 old_retry_short = rdev->wiphy.retry_short;
1198 old_retry_long = rdev->wiphy.retry_long;
1199 old_frag_threshold = rdev->wiphy.frag_threshold;
1200 old_rts_threshold = rdev->wiphy.rts_threshold;
1201 old_coverage_class = rdev->wiphy.coverage_class;
1202
1203 if (changed & WIPHY_PARAM_RETRY_SHORT)
1204 rdev->wiphy.retry_short = retry_short;
1205 if (changed & WIPHY_PARAM_RETRY_LONG)
1206 rdev->wiphy.retry_long = retry_long;
1207 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1208 rdev->wiphy.frag_threshold = frag_threshold;
1209 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1210 rdev->wiphy.rts_threshold = rts_threshold;
1211 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1212 rdev->wiphy.coverage_class = coverage_class;
1213
1214 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1215 if (result) {
1216 rdev->wiphy.retry_short = old_retry_short;
1217 rdev->wiphy.retry_long = old_retry_long;
1218 rdev->wiphy.frag_threshold = old_frag_threshold;
1219 rdev->wiphy.rts_threshold = old_rts_threshold;
1220 rdev->wiphy.coverage_class = old_coverage_class;
1221 }
1222 }
1223
1224 bad_res:
1225 mutex_unlock(&rdev->mtx);
1226 if (netdev)
1227 dev_put(netdev);
1228 return result;
1229 }
1230
1231
1232 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1233 struct cfg80211_registered_device *rdev,
1234 struct net_device *dev)
1235 {
1236 void *hdr;
1237
1238 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1239 if (!hdr)
1240 return -1;
1241
1242 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1243 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1244 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1245 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1246
1247 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1248 rdev->devlist_generation ^
1249 (cfg80211_rdev_list_generation << 2));
1250
1251 return genlmsg_end(msg, hdr);
1252
1253 nla_put_failure:
1254 genlmsg_cancel(msg, hdr);
1255 return -EMSGSIZE;
1256 }
1257
1258 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1259 {
1260 int wp_idx = 0;
1261 int if_idx = 0;
1262 int wp_start = cb->args[0];
1263 int if_start = cb->args[1];
1264 struct cfg80211_registered_device *rdev;
1265 struct wireless_dev *wdev;
1266
1267 mutex_lock(&cfg80211_mutex);
1268 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1269 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1270 continue;
1271 if (wp_idx < wp_start) {
1272 wp_idx++;
1273 continue;
1274 }
1275 if_idx = 0;
1276
1277 mutex_lock(&rdev->devlist_mtx);
1278 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1279 if (if_idx < if_start) {
1280 if_idx++;
1281 continue;
1282 }
1283 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1284 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1285 rdev, wdev->netdev) < 0) {
1286 mutex_unlock(&rdev->devlist_mtx);
1287 goto out;
1288 }
1289 if_idx++;
1290 }
1291 mutex_unlock(&rdev->devlist_mtx);
1292
1293 wp_idx++;
1294 }
1295 out:
1296 mutex_unlock(&cfg80211_mutex);
1297
1298 cb->args[0] = wp_idx;
1299 cb->args[1] = if_idx;
1300
1301 return skb->len;
1302 }
1303
1304 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1305 {
1306 struct sk_buff *msg;
1307 struct cfg80211_registered_device *dev = info->user_ptr[0];
1308 struct net_device *netdev = info->user_ptr[1];
1309
1310 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1311 if (!msg)
1312 return -ENOMEM;
1313
1314 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1315 dev, netdev) < 0) {
1316 nlmsg_free(msg);
1317 return -ENOBUFS;
1318 }
1319
1320 return genlmsg_reply(msg, info);
1321 }
1322
1323 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1324 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1325 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1326 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1327 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1328 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1329 };
1330
1331 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1332 {
1333 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1334 int flag;
1335
1336 *mntrflags = 0;
1337
1338 if (!nla)
1339 return -EINVAL;
1340
1341 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1342 nla, mntr_flags_policy))
1343 return -EINVAL;
1344
1345 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1346 if (flags[flag])
1347 *mntrflags |= (1<<flag);
1348
1349 return 0;
1350 }
1351
1352 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1353 struct net_device *netdev, u8 use_4addr,
1354 enum nl80211_iftype iftype)
1355 {
1356 if (!use_4addr) {
1357 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1358 return -EBUSY;
1359 return 0;
1360 }
1361
1362 switch (iftype) {
1363 case NL80211_IFTYPE_AP_VLAN:
1364 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1365 return 0;
1366 break;
1367 case NL80211_IFTYPE_STATION:
1368 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1369 return 0;
1370 break;
1371 default:
1372 break;
1373 }
1374
1375 return -EOPNOTSUPP;
1376 }
1377
1378 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1379 {
1380 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1381 struct vif_params params;
1382 int err;
1383 enum nl80211_iftype otype, ntype;
1384 struct net_device *dev = info->user_ptr[1];
1385 u32 _flags, *flags = NULL;
1386 bool change = false;
1387
1388 memset(&params, 0, sizeof(params));
1389
1390 otype = ntype = dev->ieee80211_ptr->iftype;
1391
1392 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1393 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1394 if (otype != ntype)
1395 change = true;
1396 if (ntype > NL80211_IFTYPE_MAX)
1397 return -EINVAL;
1398 }
1399
1400 if (info->attrs[NL80211_ATTR_MESH_ID]) {
1401 struct wireless_dev *wdev = dev->ieee80211_ptr;
1402
1403 if (ntype != NL80211_IFTYPE_MESH_POINT)
1404 return -EINVAL;
1405 if (netif_running(dev))
1406 return -EBUSY;
1407
1408 wdev_lock(wdev);
1409 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1410 IEEE80211_MAX_MESH_ID_LEN);
1411 wdev->mesh_id_up_len =
1412 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1413 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1414 wdev->mesh_id_up_len);
1415 wdev_unlock(wdev);
1416 }
1417
1418 if (info->attrs[NL80211_ATTR_4ADDR]) {
1419 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1420 change = true;
1421 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1422 if (err)
1423 return err;
1424 } else {
1425 params.use_4addr = -1;
1426 }
1427
1428 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1429 if (ntype != NL80211_IFTYPE_MONITOR)
1430 return -EINVAL;
1431 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1432 &_flags);
1433 if (err)
1434 return err;
1435
1436 flags = &_flags;
1437 change = true;
1438 }
1439
1440 if (change)
1441 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1442 else
1443 err = 0;
1444
1445 if (!err && params.use_4addr != -1)
1446 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1447
1448 return err;
1449 }
1450
1451 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1452 {
1453 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1454 struct vif_params params;
1455 struct net_device *dev;
1456 int err;
1457 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1458 u32 flags;
1459
1460 memset(&params, 0, sizeof(params));
1461
1462 if (!info->attrs[NL80211_ATTR_IFNAME])
1463 return -EINVAL;
1464
1465 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1466 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1467 if (type > NL80211_IFTYPE_MAX)
1468 return -EINVAL;
1469 }
1470
1471 if (!rdev->ops->add_virtual_intf ||
1472 !(rdev->wiphy.interface_modes & (1 << type)))
1473 return -EOPNOTSUPP;
1474
1475 if (info->attrs[NL80211_ATTR_4ADDR]) {
1476 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1477 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1478 if (err)
1479 return err;
1480 }
1481
1482 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1483 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1484 &flags);
1485 dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1486 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1487 type, err ? NULL : &flags, &params);
1488 if (IS_ERR(dev))
1489 return PTR_ERR(dev);
1490
1491 if (type == NL80211_IFTYPE_MESH_POINT &&
1492 info->attrs[NL80211_ATTR_MESH_ID]) {
1493 struct wireless_dev *wdev = dev->ieee80211_ptr;
1494
1495 wdev_lock(wdev);
1496 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1497 IEEE80211_MAX_MESH_ID_LEN);
1498 wdev->mesh_id_up_len =
1499 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1500 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1501 wdev->mesh_id_up_len);
1502 wdev_unlock(wdev);
1503 }
1504
1505 return 0;
1506 }
1507
1508 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1509 {
1510 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1511 struct net_device *dev = info->user_ptr[1];
1512
1513 if (!rdev->ops->del_virtual_intf)
1514 return -EOPNOTSUPP;
1515
1516 return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1517 }
1518
1519 struct get_key_cookie {
1520 struct sk_buff *msg;
1521 int error;
1522 int idx;
1523 };
1524
1525 static void get_key_callback(void *c, struct key_params *params)
1526 {
1527 struct nlattr *key;
1528 struct get_key_cookie *cookie = c;
1529
1530 if (params->key)
1531 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1532 params->key_len, params->key);
1533
1534 if (params->seq)
1535 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1536 params->seq_len, params->seq);
1537
1538 if (params->cipher)
1539 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1540 params->cipher);
1541
1542 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1543 if (!key)
1544 goto nla_put_failure;
1545
1546 if (params->key)
1547 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1548 params->key_len, params->key);
1549
1550 if (params->seq)
1551 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1552 params->seq_len, params->seq);
1553
1554 if (params->cipher)
1555 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1556 params->cipher);
1557
1558 NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1559
1560 nla_nest_end(cookie->msg, key);
1561
1562 return;
1563 nla_put_failure:
1564 cookie->error = 1;
1565 }
1566
1567 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1568 {
1569 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1570 int err;
1571 struct net_device *dev = info->user_ptr[1];
1572 u8 key_idx = 0;
1573 const u8 *mac_addr = NULL;
1574 bool pairwise;
1575 struct get_key_cookie cookie = {
1576 .error = 0,
1577 };
1578 void *hdr;
1579 struct sk_buff *msg;
1580
1581 if (info->attrs[NL80211_ATTR_KEY_IDX])
1582 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1583
1584 if (key_idx > 5)
1585 return -EINVAL;
1586
1587 if (info->attrs[NL80211_ATTR_MAC])
1588 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1589
1590 pairwise = !!mac_addr;
1591 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1592 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1593 if (kt >= NUM_NL80211_KEYTYPES)
1594 return -EINVAL;
1595 if (kt != NL80211_KEYTYPE_GROUP &&
1596 kt != NL80211_KEYTYPE_PAIRWISE)
1597 return -EINVAL;
1598 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1599 }
1600
1601 if (!rdev->ops->get_key)
1602 return -EOPNOTSUPP;
1603
1604 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1605 if (!msg)
1606 return -ENOMEM;
1607
1608 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1609 NL80211_CMD_NEW_KEY);
1610 if (IS_ERR(hdr))
1611 return PTR_ERR(hdr);
1612
1613 cookie.msg = msg;
1614 cookie.idx = key_idx;
1615
1616 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1617 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1618 if (mac_addr)
1619 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1620
1621 if (pairwise && mac_addr &&
1622 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1623 return -ENOENT;
1624
1625 err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1626 mac_addr, &cookie, get_key_callback);
1627
1628 if (err)
1629 goto free_msg;
1630
1631 if (cookie.error)
1632 goto nla_put_failure;
1633
1634 genlmsg_end(msg, hdr);
1635 return genlmsg_reply(msg, info);
1636
1637 nla_put_failure:
1638 err = -ENOBUFS;
1639 free_msg:
1640 nlmsg_free(msg);
1641 return err;
1642 }
1643
1644 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1645 {
1646 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1647 struct key_parse key;
1648 int err;
1649 struct net_device *dev = info->user_ptr[1];
1650
1651 err = nl80211_parse_key(info, &key);
1652 if (err)
1653 return err;
1654
1655 if (key.idx < 0)
1656 return -EINVAL;
1657
1658 /* only support setting default key */
1659 if (!key.def && !key.defmgmt)
1660 return -EINVAL;
1661
1662 wdev_lock(dev->ieee80211_ptr);
1663
1664 if (key.def) {
1665 if (!rdev->ops->set_default_key) {
1666 err = -EOPNOTSUPP;
1667 goto out;
1668 }
1669
1670 err = nl80211_key_allowed(dev->ieee80211_ptr);
1671 if (err)
1672 goto out;
1673
1674 if (!(rdev->wiphy.flags &
1675 WIPHY_FLAG_SUPPORTS_SEPARATE_DEFAULT_KEYS)) {
1676 if (!key.def_uni || !key.def_multi) {
1677 err = -EOPNOTSUPP;
1678 goto out;
1679 }
1680 }
1681
1682 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1683 key.def_uni, key.def_multi);
1684
1685 if (err)
1686 goto out;
1687
1688 #ifdef CONFIG_CFG80211_WEXT
1689 dev->ieee80211_ptr->wext.default_key = key.idx;
1690 #endif
1691 } else {
1692 if (key.def_uni || !key.def_multi) {
1693 err = -EINVAL;
1694 goto out;
1695 }
1696
1697 if (!rdev->ops->set_default_mgmt_key) {
1698 err = -EOPNOTSUPP;
1699 goto out;
1700 }
1701
1702 err = nl80211_key_allowed(dev->ieee80211_ptr);
1703 if (err)
1704 goto out;
1705
1706 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1707 dev, key.idx);
1708 if (err)
1709 goto out;
1710
1711 #ifdef CONFIG_CFG80211_WEXT
1712 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1713 #endif
1714 }
1715
1716 out:
1717 wdev_unlock(dev->ieee80211_ptr);
1718
1719 return err;
1720 }
1721
1722 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1723 {
1724 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1725 int err;
1726 struct net_device *dev = info->user_ptr[1];
1727 struct key_parse key;
1728 const u8 *mac_addr = NULL;
1729
1730 err = nl80211_parse_key(info, &key);
1731 if (err)
1732 return err;
1733
1734 if (!key.p.key)
1735 return -EINVAL;
1736
1737 if (info->attrs[NL80211_ATTR_MAC])
1738 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1739
1740 if (key.type == -1) {
1741 if (mac_addr)
1742 key.type = NL80211_KEYTYPE_PAIRWISE;
1743 else
1744 key.type = NL80211_KEYTYPE_GROUP;
1745 }
1746
1747 /* for now */
1748 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1749 key.type != NL80211_KEYTYPE_GROUP)
1750 return -EINVAL;
1751
1752 if (!rdev->ops->add_key)
1753 return -EOPNOTSUPP;
1754
1755 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1756 key.type == NL80211_KEYTYPE_PAIRWISE,
1757 mac_addr))
1758 return -EINVAL;
1759
1760 wdev_lock(dev->ieee80211_ptr);
1761 err = nl80211_key_allowed(dev->ieee80211_ptr);
1762 if (!err)
1763 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1764 key.type == NL80211_KEYTYPE_PAIRWISE,
1765 mac_addr, &key.p);
1766 wdev_unlock(dev->ieee80211_ptr);
1767
1768 return err;
1769 }
1770
1771 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1772 {
1773 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1774 int err;
1775 struct net_device *dev = info->user_ptr[1];
1776 u8 *mac_addr = NULL;
1777 struct key_parse key;
1778
1779 err = nl80211_parse_key(info, &key);
1780 if (err)
1781 return err;
1782
1783 if (info->attrs[NL80211_ATTR_MAC])
1784 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1785
1786 if (key.type == -1) {
1787 if (mac_addr)
1788 key.type = NL80211_KEYTYPE_PAIRWISE;
1789 else
1790 key.type = NL80211_KEYTYPE_GROUP;
1791 }
1792
1793 /* for now */
1794 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1795 key.type != NL80211_KEYTYPE_GROUP)
1796 return -EINVAL;
1797
1798 if (!rdev->ops->del_key)
1799 return -EOPNOTSUPP;
1800
1801 wdev_lock(dev->ieee80211_ptr);
1802 err = nl80211_key_allowed(dev->ieee80211_ptr);
1803
1804 if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1805 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1806 err = -ENOENT;
1807
1808 if (!err)
1809 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1810 key.type == NL80211_KEYTYPE_PAIRWISE,
1811 mac_addr);
1812
1813 #ifdef CONFIG_CFG80211_WEXT
1814 if (!err) {
1815 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1816 dev->ieee80211_ptr->wext.default_key = -1;
1817 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1818 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1819 }
1820 #endif
1821 wdev_unlock(dev->ieee80211_ptr);
1822
1823 return err;
1824 }
1825
1826 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1827 {
1828 int (*call)(struct wiphy *wiphy, struct net_device *dev,
1829 struct beacon_parameters *info);
1830 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1831 struct net_device *dev = info->user_ptr[1];
1832 struct beacon_parameters params;
1833 int haveinfo = 0;
1834
1835 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1836 return -EINVAL;
1837
1838 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1839 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1840 return -EOPNOTSUPP;
1841
1842 switch (info->genlhdr->cmd) {
1843 case NL80211_CMD_NEW_BEACON:
1844 /* these are required for NEW_BEACON */
1845 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1846 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1847 !info->attrs[NL80211_ATTR_BEACON_HEAD])
1848 return -EINVAL;
1849
1850 call = rdev->ops->add_beacon;
1851 break;
1852 case NL80211_CMD_SET_BEACON:
1853 call = rdev->ops->set_beacon;
1854 break;
1855 default:
1856 WARN_ON(1);
1857 return -EOPNOTSUPP;
1858 }
1859
1860 if (!call)
1861 return -EOPNOTSUPP;
1862
1863 memset(&params, 0, sizeof(params));
1864
1865 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1866 params.interval =
1867 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1868 haveinfo = 1;
1869 }
1870
1871 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1872 params.dtim_period =
1873 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1874 haveinfo = 1;
1875 }
1876
1877 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1878 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1879 params.head_len =
1880 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1881 haveinfo = 1;
1882 }
1883
1884 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1885 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1886 params.tail_len =
1887 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1888 haveinfo = 1;
1889 }
1890
1891 if (!haveinfo)
1892 return -EINVAL;
1893
1894 return call(&rdev->wiphy, dev, &params);
1895 }
1896
1897 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1898 {
1899 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1900 struct net_device *dev = info->user_ptr[1];
1901
1902 if (!rdev->ops->del_beacon)
1903 return -EOPNOTSUPP;
1904
1905 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1906 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1907 return -EOPNOTSUPP;
1908
1909 return rdev->ops->del_beacon(&rdev->wiphy, dev);
1910 }
1911
1912 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1913 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1914 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1915 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1916 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1917 };
1918
1919 static int parse_station_flags(struct genl_info *info,
1920 struct station_parameters *params)
1921 {
1922 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1923 struct nlattr *nla;
1924 int flag;
1925
1926 /*
1927 * Try parsing the new attribute first so userspace
1928 * can specify both for older kernels.
1929 */
1930 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1931 if (nla) {
1932 struct nl80211_sta_flag_update *sta_flags;
1933
1934 sta_flags = nla_data(nla);
1935 params->sta_flags_mask = sta_flags->mask;
1936 params->sta_flags_set = sta_flags->set;
1937 if ((params->sta_flags_mask |
1938 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1939 return -EINVAL;
1940 return 0;
1941 }
1942
1943 /* if present, parse the old attribute */
1944
1945 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1946 if (!nla)
1947 return 0;
1948
1949 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1950 nla, sta_flags_policy))
1951 return -EINVAL;
1952
1953 params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1954 params->sta_flags_mask &= ~1;
1955
1956 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1957 if (flags[flag])
1958 params->sta_flags_set |= (1<<flag);
1959
1960 return 0;
1961 }
1962
1963 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1964 int flags, struct net_device *dev,
1965 const u8 *mac_addr, struct station_info *sinfo)
1966 {
1967 void *hdr;
1968 struct nlattr *sinfoattr, *txrate;
1969 u16 bitrate;
1970
1971 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1972 if (!hdr)
1973 return -1;
1974
1975 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1976 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1977
1978 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1979
1980 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1981 if (!sinfoattr)
1982 goto nla_put_failure;
1983 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1984 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1985 sinfo->inactive_time);
1986 if (sinfo->filled & STATION_INFO_RX_BYTES)
1987 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1988 sinfo->rx_bytes);
1989 if (sinfo->filled & STATION_INFO_TX_BYTES)
1990 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1991 sinfo->tx_bytes);
1992 if (sinfo->filled & STATION_INFO_LLID)
1993 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1994 sinfo->llid);
1995 if (sinfo->filled & STATION_INFO_PLID)
1996 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1997 sinfo->plid);
1998 if (sinfo->filled & STATION_INFO_PLINK_STATE)
1999 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2000 sinfo->plink_state);
2001 if (sinfo->filled & STATION_INFO_SIGNAL)
2002 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2003 sinfo->signal);
2004 if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2005 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2006 sinfo->signal_avg);
2007 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2008 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
2009 if (!txrate)
2010 goto nla_put_failure;
2011
2012 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2013 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
2014 if (bitrate > 0)
2015 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2016
2017 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
2018 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
2019 sinfo->txrate.mcs);
2020 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2021 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2022 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
2023 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2024
2025 nla_nest_end(msg, txrate);
2026 }
2027 if (sinfo->filled & STATION_INFO_RX_PACKETS)
2028 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2029 sinfo->rx_packets);
2030 if (sinfo->filled & STATION_INFO_TX_PACKETS)
2031 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2032 sinfo->tx_packets);
2033 if (sinfo->filled & STATION_INFO_TX_RETRIES)
2034 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2035 sinfo->tx_retries);
2036 if (sinfo->filled & STATION_INFO_TX_FAILED)
2037 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2038 sinfo->tx_failed);
2039 nla_nest_end(msg, sinfoattr);
2040
2041 return genlmsg_end(msg, hdr);
2042
2043 nla_put_failure:
2044 genlmsg_cancel(msg, hdr);
2045 return -EMSGSIZE;
2046 }
2047
2048 static int nl80211_dump_station(struct sk_buff *skb,
2049 struct netlink_callback *cb)
2050 {
2051 struct station_info sinfo;
2052 struct cfg80211_registered_device *dev;
2053 struct net_device *netdev;
2054 u8 mac_addr[ETH_ALEN];
2055 int sta_idx = cb->args[1];
2056 int err;
2057
2058 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2059 if (err)
2060 return err;
2061
2062 if (!dev->ops->dump_station) {
2063 err = -EOPNOTSUPP;
2064 goto out_err;
2065 }
2066
2067 while (1) {
2068 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2069 mac_addr, &sinfo);
2070 if (err == -ENOENT)
2071 break;
2072 if (err)
2073 goto out_err;
2074
2075 if (nl80211_send_station(skb,
2076 NETLINK_CB(cb->skb).pid,
2077 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2078 netdev, mac_addr,
2079 &sinfo) < 0)
2080 goto out;
2081
2082 sta_idx++;
2083 }
2084
2085
2086 out:
2087 cb->args[1] = sta_idx;
2088 err = skb->len;
2089 out_err:
2090 nl80211_finish_netdev_dump(dev);
2091
2092 return err;
2093 }
2094
2095 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2096 {
2097 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2098 struct net_device *dev = info->user_ptr[1];
2099 struct station_info sinfo;
2100 struct sk_buff *msg;
2101 u8 *mac_addr = NULL;
2102 int err;
2103
2104 memset(&sinfo, 0, sizeof(sinfo));
2105
2106 if (!info->attrs[NL80211_ATTR_MAC])
2107 return -EINVAL;
2108
2109 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2110
2111 if (!rdev->ops->get_station)
2112 return -EOPNOTSUPP;
2113
2114 err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2115 if (err)
2116 return err;
2117
2118 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2119 if (!msg)
2120 return -ENOMEM;
2121
2122 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2123 dev, mac_addr, &sinfo) < 0) {
2124 nlmsg_free(msg);
2125 return -ENOBUFS;
2126 }
2127
2128 return genlmsg_reply(msg, info);
2129 }
2130
2131 /*
2132 * Get vlan interface making sure it is running and on the right wiphy.
2133 */
2134 static int get_vlan(struct genl_info *info,
2135 struct cfg80211_registered_device *rdev,
2136 struct net_device **vlan)
2137 {
2138 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2139 *vlan = NULL;
2140
2141 if (vlanattr) {
2142 *vlan = dev_get_by_index(genl_info_net(info),
2143 nla_get_u32(vlanattr));
2144 if (!*vlan)
2145 return -ENODEV;
2146 if (!(*vlan)->ieee80211_ptr)
2147 return -EINVAL;
2148 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2149 return -EINVAL;
2150 if (!netif_running(*vlan))
2151 return -ENETDOWN;
2152 }
2153 return 0;
2154 }
2155
2156 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2157 {
2158 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2159 int err;
2160 struct net_device *dev = info->user_ptr[1];
2161 struct station_parameters params;
2162 u8 *mac_addr = NULL;
2163
2164 memset(&params, 0, sizeof(params));
2165
2166 params.listen_interval = -1;
2167
2168 if (info->attrs[NL80211_ATTR_STA_AID])
2169 return -EINVAL;
2170
2171 if (!info->attrs[NL80211_ATTR_MAC])
2172 return -EINVAL;
2173
2174 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2175
2176 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2177 params.supported_rates =
2178 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2179 params.supported_rates_len =
2180 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2181 }
2182
2183 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2184 params.listen_interval =
2185 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2186
2187 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2188 params.ht_capa =
2189 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2190
2191 if (parse_station_flags(info, &params))
2192 return -EINVAL;
2193
2194 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2195 params.plink_action =
2196 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2197
2198 err = get_vlan(info, rdev, &params.vlan);
2199 if (err)
2200 goto out;
2201
2202 /* validate settings */
2203 err = 0;
2204
2205 switch (dev->ieee80211_ptr->iftype) {
2206 case NL80211_IFTYPE_AP:
2207 case NL80211_IFTYPE_AP_VLAN:
2208 case NL80211_IFTYPE_P2P_GO:
2209 /* disallow mesh-specific things */
2210 if (params.plink_action)
2211 err = -EINVAL;
2212 break;
2213 case NL80211_IFTYPE_P2P_CLIENT:
2214 case NL80211_IFTYPE_STATION:
2215 /* disallow everything but AUTHORIZED flag */
2216 if (params.plink_action)
2217 err = -EINVAL;
2218 if (params.vlan)
2219 err = -EINVAL;
2220 if (params.supported_rates)
2221 err = -EINVAL;
2222 if (params.ht_capa)
2223 err = -EINVAL;
2224 if (params.listen_interval >= 0)
2225 err = -EINVAL;
2226 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2227 err = -EINVAL;
2228 break;
2229 case NL80211_IFTYPE_MESH_POINT:
2230 /* disallow things mesh doesn't support */
2231 if (params.vlan)
2232 err = -EINVAL;
2233 if (params.ht_capa)
2234 err = -EINVAL;
2235 if (params.listen_interval >= 0)
2236 err = -EINVAL;
2237 if (params.supported_rates)
2238 err = -EINVAL;
2239 if (params.sta_flags_mask)
2240 err = -EINVAL;
2241 break;
2242 default:
2243 err = -EINVAL;
2244 }
2245
2246 if (err)
2247 goto out;
2248
2249 if (!rdev->ops->change_station) {
2250 err = -EOPNOTSUPP;
2251 goto out;
2252 }
2253
2254 err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2255
2256 out:
2257 if (params.vlan)
2258 dev_put(params.vlan);
2259
2260 return err;
2261 }
2262
2263 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2264 {
2265 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2266 int err;
2267 struct net_device *dev = info->user_ptr[1];
2268 struct station_parameters params;
2269 u8 *mac_addr = NULL;
2270
2271 memset(&params, 0, sizeof(params));
2272
2273 if (!info->attrs[NL80211_ATTR_MAC])
2274 return -EINVAL;
2275
2276 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2277 return -EINVAL;
2278
2279 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2280 return -EINVAL;
2281
2282 if (!info->attrs[NL80211_ATTR_STA_AID])
2283 return -EINVAL;
2284
2285 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2286 params.supported_rates =
2287 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2288 params.supported_rates_len =
2289 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2290 params.listen_interval =
2291 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2292
2293 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2294 if (!params.aid || params.aid > IEEE80211_MAX_AID)
2295 return -EINVAL;
2296
2297 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2298 params.ht_capa =
2299 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2300
2301 if (parse_station_flags(info, &params))
2302 return -EINVAL;
2303
2304 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2305 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2306 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2307 return -EINVAL;
2308
2309 err = get_vlan(info, rdev, &params.vlan);
2310 if (err)
2311 goto out;
2312
2313 /* validate settings */
2314 err = 0;
2315
2316 if (!rdev->ops->add_station) {
2317 err = -EOPNOTSUPP;
2318 goto out;
2319 }
2320
2321 err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2322
2323 out:
2324 if (params.vlan)
2325 dev_put(params.vlan);
2326 return err;
2327 }
2328
2329 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2330 {
2331 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2332 struct net_device *dev = info->user_ptr[1];
2333 u8 *mac_addr = NULL;
2334
2335 if (info->attrs[NL80211_ATTR_MAC])
2336 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2337
2338 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2339 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2340 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2341 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2342 return -EINVAL;
2343
2344 if (!rdev->ops->del_station)
2345 return -EOPNOTSUPP;
2346
2347 return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2348 }
2349
2350 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2351 int flags, struct net_device *dev,
2352 u8 *dst, u8 *next_hop,
2353 struct mpath_info *pinfo)
2354 {
2355 void *hdr;
2356 struct nlattr *pinfoattr;
2357
2358 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2359 if (!hdr)
2360 return -1;
2361
2362 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2363 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2364 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2365
2366 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2367
2368 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2369 if (!pinfoattr)
2370 goto nla_put_failure;
2371 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2372 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2373 pinfo->frame_qlen);
2374 if (pinfo->filled & MPATH_INFO_SN)
2375 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2376 pinfo->sn);
2377 if (pinfo->filled & MPATH_INFO_METRIC)
2378 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2379 pinfo->metric);
2380 if (pinfo->filled & MPATH_INFO_EXPTIME)
2381 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2382 pinfo->exptime);
2383 if (pinfo->filled & MPATH_INFO_FLAGS)
2384 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2385 pinfo->flags);
2386 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2387 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2388 pinfo->discovery_timeout);
2389 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2390 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2391 pinfo->discovery_retries);
2392
2393 nla_nest_end(msg, pinfoattr);
2394
2395 return genlmsg_end(msg, hdr);
2396
2397 nla_put_failure:
2398 genlmsg_cancel(msg, hdr);
2399 return -EMSGSIZE;
2400 }
2401
2402 static int nl80211_dump_mpath(struct sk_buff *skb,
2403 struct netlink_callback *cb)
2404 {
2405 struct mpath_info pinfo;
2406 struct cfg80211_registered_device *dev;
2407 struct net_device *netdev;
2408 u8 dst[ETH_ALEN];
2409 u8 next_hop[ETH_ALEN];
2410 int path_idx = cb->args[1];
2411 int err;
2412
2413 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2414 if (err)
2415 return err;
2416
2417 if (!dev->ops->dump_mpath) {
2418 err = -EOPNOTSUPP;
2419 goto out_err;
2420 }
2421
2422 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2423 err = -EOPNOTSUPP;
2424 goto out_err;
2425 }
2426
2427 while (1) {
2428 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2429 dst, next_hop, &pinfo);
2430 if (err == -ENOENT)
2431 break;
2432 if (err)
2433 goto out_err;
2434
2435 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2436 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2437 netdev, dst, next_hop,
2438 &pinfo) < 0)
2439 goto out;
2440
2441 path_idx++;
2442 }
2443
2444
2445 out:
2446 cb->args[1] = path_idx;
2447 err = skb->len;
2448 out_err:
2449 nl80211_finish_netdev_dump(dev);
2450 return err;
2451 }
2452
2453 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2454 {
2455 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2456 int err;
2457 struct net_device *dev = info->user_ptr[1];
2458 struct mpath_info pinfo;
2459 struct sk_buff *msg;
2460 u8 *dst = NULL;
2461 u8 next_hop[ETH_ALEN];
2462
2463 memset(&pinfo, 0, sizeof(pinfo));
2464
2465 if (!info->attrs[NL80211_ATTR_MAC])
2466 return -EINVAL;
2467
2468 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2469
2470 if (!rdev->ops->get_mpath)
2471 return -EOPNOTSUPP;
2472
2473 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2474 return -EOPNOTSUPP;
2475
2476 err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2477 if (err)
2478 return err;
2479
2480 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2481 if (!msg)
2482 return -ENOMEM;
2483
2484 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2485 dev, dst, next_hop, &pinfo) < 0) {
2486 nlmsg_free(msg);
2487 return -ENOBUFS;
2488 }
2489
2490 return genlmsg_reply(msg, info);
2491 }
2492
2493 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2494 {
2495 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2496 struct net_device *dev = info->user_ptr[1];
2497 u8 *dst = NULL;
2498 u8 *next_hop = NULL;
2499
2500 if (!info->attrs[NL80211_ATTR_MAC])
2501 return -EINVAL;
2502
2503 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2504 return -EINVAL;
2505
2506 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2507 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2508
2509 if (!rdev->ops->change_mpath)
2510 return -EOPNOTSUPP;
2511
2512 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2513 return -EOPNOTSUPP;
2514
2515 return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2516 }
2517
2518 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2519 {
2520 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2521 struct net_device *dev = info->user_ptr[1];
2522 u8 *dst = NULL;
2523 u8 *next_hop = NULL;
2524
2525 if (!info->attrs[NL80211_ATTR_MAC])
2526 return -EINVAL;
2527
2528 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2529 return -EINVAL;
2530
2531 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2532 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2533
2534 if (!rdev->ops->add_mpath)
2535 return -EOPNOTSUPP;
2536
2537 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2538 return -EOPNOTSUPP;
2539
2540 return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2541 }
2542
2543 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2544 {
2545 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2546 struct net_device *dev = info->user_ptr[1];
2547 u8 *dst = NULL;
2548
2549 if (info->attrs[NL80211_ATTR_MAC])
2550 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2551
2552 if (!rdev->ops->del_mpath)
2553 return -EOPNOTSUPP;
2554
2555 return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2556 }
2557
2558 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2559 {
2560 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2561 struct net_device *dev = info->user_ptr[1];
2562 struct bss_parameters params;
2563
2564 memset(&params, 0, sizeof(params));
2565 /* default to not changing parameters */
2566 params.use_cts_prot = -1;
2567 params.use_short_preamble = -1;
2568 params.use_short_slot_time = -1;
2569 params.ap_isolate = -1;
2570 params.ht_opmode = -1;
2571
2572 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2573 params.use_cts_prot =
2574 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2575 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2576 params.use_short_preamble =
2577 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2578 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2579 params.use_short_slot_time =
2580 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2581 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2582 params.basic_rates =
2583 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2584 params.basic_rates_len =
2585 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2586 }
2587 if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2588 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2589 if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2590 params.ht_opmode =
2591 nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2592
2593 if (!rdev->ops->change_bss)
2594 return -EOPNOTSUPP;
2595
2596 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2597 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2598 return -EOPNOTSUPP;
2599
2600 return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2601 }
2602
2603 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2604 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
2605 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
2606 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
2607 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
2608 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
2609 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
2610 };
2611
2612 static int parse_reg_rule(struct nlattr *tb[],
2613 struct ieee80211_reg_rule *reg_rule)
2614 {
2615 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2616 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2617
2618 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2619 return -EINVAL;
2620 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2621 return -EINVAL;
2622 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2623 return -EINVAL;
2624 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2625 return -EINVAL;
2626 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2627 return -EINVAL;
2628
2629 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2630
2631 freq_range->start_freq_khz =
2632 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2633 freq_range->end_freq_khz =
2634 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2635 freq_range->max_bandwidth_khz =
2636 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2637
2638 power_rule->max_eirp =
2639 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2640
2641 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2642 power_rule->max_antenna_gain =
2643 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2644
2645 return 0;
2646 }
2647
2648 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2649 {
2650 int r;
2651 char *data = NULL;
2652
2653 /*
2654 * You should only get this when cfg80211 hasn't yet initialized
2655 * completely when built-in to the kernel right between the time
2656 * window between nl80211_init() and regulatory_init(), if that is
2657 * even possible.
2658 */
2659 mutex_lock(&cfg80211_mutex);
2660 if (unlikely(!cfg80211_regdomain)) {
2661 mutex_unlock(&cfg80211_mutex);
2662 return -EINPROGRESS;
2663 }
2664 mutex_unlock(&cfg80211_mutex);
2665
2666 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2667 return -EINVAL;
2668
2669 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2670
2671 r = regulatory_hint_user(data);
2672
2673 return r;
2674 }
2675
2676 static int nl80211_get_mesh_params(struct sk_buff *skb,
2677 struct genl_info *info)
2678 {
2679 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2680 struct net_device *dev = info->user_ptr[1];
2681 struct wireless_dev *wdev = dev->ieee80211_ptr;
2682 struct mesh_config cur_params;
2683 int err = 0;
2684 void *hdr;
2685 struct nlattr *pinfoattr;
2686 struct sk_buff *msg;
2687
2688 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2689 return -EOPNOTSUPP;
2690
2691 if (!rdev->ops->get_mesh_params)
2692 return -EOPNOTSUPP;
2693
2694 wdev_lock(wdev);
2695 /* If not connected, get default parameters */
2696 if (!wdev->mesh_id_len)
2697 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
2698 else
2699 err = rdev->ops->get_mesh_params(&rdev->wiphy, dev,
2700 &cur_params);
2701 wdev_unlock(wdev);
2702
2703 if (err)
2704 return err;
2705
2706 /* Draw up a netlink message to send back */
2707 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2708 if (!msg)
2709 return -ENOMEM;
2710 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2711 NL80211_CMD_GET_MESH_PARAMS);
2712 if (!hdr)
2713 goto nla_put_failure;
2714 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2715 if (!pinfoattr)
2716 goto nla_put_failure;
2717 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2718 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2719 cur_params.dot11MeshRetryTimeout);
2720 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2721 cur_params.dot11MeshConfirmTimeout);
2722 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2723 cur_params.dot11MeshHoldingTimeout);
2724 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2725 cur_params.dot11MeshMaxPeerLinks);
2726 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2727 cur_params.dot11MeshMaxRetries);
2728 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2729 cur_params.dot11MeshTTL);
2730 NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
2731 cur_params.element_ttl);
2732 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2733 cur_params.auto_open_plinks);
2734 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2735 cur_params.dot11MeshHWMPmaxPREQretries);
2736 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2737 cur_params.path_refresh_time);
2738 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2739 cur_params.min_discovery_timeout);
2740 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2741 cur_params.dot11MeshHWMPactivePathTimeout);
2742 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2743 cur_params.dot11MeshHWMPpreqMinInterval);
2744 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2745 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2746 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2747 cur_params.dot11MeshHWMPRootMode);
2748 nla_nest_end(msg, pinfoattr);
2749 genlmsg_end(msg, hdr);
2750 return genlmsg_reply(msg, info);
2751
2752 nla_put_failure:
2753 genlmsg_cancel(msg, hdr);
2754 nlmsg_free(msg);
2755 return -ENOBUFS;
2756 }
2757
2758 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2759 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2760 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2761 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2762 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2763 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2764 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2765 [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
2766 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2767
2768 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2769 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2770 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2771 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2772 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2773 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2774 };
2775
2776 static int nl80211_parse_mesh_params(struct genl_info *info,
2777 struct mesh_config *cfg,
2778 u32 *mask_out)
2779 {
2780 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2781 u32 mask = 0;
2782
2783 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2784 do {\
2785 if (table[attr_num]) {\
2786 cfg->param = nla_fn(table[attr_num]); \
2787 mask |= (1 << (attr_num - 1)); \
2788 } \
2789 } while (0);\
2790
2791
2792 if (!info->attrs[NL80211_ATTR_MESH_PARAMS])
2793 return -EINVAL;
2794 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2795 info->attrs[NL80211_ATTR_MESH_PARAMS],
2796 nl80211_meshconf_params_policy))
2797 return -EINVAL;
2798
2799 /* This makes sure that there aren't more than 32 mesh config
2800 * parameters (otherwise our bitfield scheme would not work.) */
2801 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2802
2803 /* Fill in the params struct */
2804 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2805 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2806 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2807 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2808 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2809 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2810 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2811 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2812 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2813 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2814 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2815 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2816 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
2817 mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
2818 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2819 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2820 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2821 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2822 nla_get_u8);
2823 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2824 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2825 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2826 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2827 nla_get_u16);
2828 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2829 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2830 nla_get_u32);
2831 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2832 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2833 nla_get_u16);
2834 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2835 dot11MeshHWMPnetDiameterTraversalTime,
2836 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2837 nla_get_u16);
2838 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2839 dot11MeshHWMPRootMode, mask,
2840 NL80211_MESHCONF_HWMP_ROOTMODE,
2841 nla_get_u8);
2842
2843 if (mask_out)
2844 *mask_out = mask;
2845 return 0;
2846
2847 #undef FILL_IN_MESH_PARAM_IF_SET
2848 }
2849
2850 static int nl80211_update_mesh_params(struct sk_buff *skb,
2851 struct genl_info *info)
2852 {
2853 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2854 struct net_device *dev = info->user_ptr[1];
2855 struct wireless_dev *wdev = dev->ieee80211_ptr;
2856 struct mesh_config cfg;
2857 u32 mask;
2858 int err;
2859
2860 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2861 return -EOPNOTSUPP;
2862
2863 if (!rdev->ops->update_mesh_params)
2864 return -EOPNOTSUPP;
2865
2866 err = nl80211_parse_mesh_params(info, &cfg, &mask);
2867 if (err)
2868 return err;
2869
2870 wdev_lock(wdev);
2871 if (!wdev->mesh_id_len)
2872 err = -ENOLINK;
2873
2874 if (!err)
2875 err = rdev->ops->update_mesh_params(&rdev->wiphy, dev,
2876 mask, &cfg);
2877
2878 wdev_unlock(wdev);
2879
2880 return err;
2881 }
2882
2883 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2884 {
2885 struct sk_buff *msg;
2886 void *hdr = NULL;
2887 struct nlattr *nl_reg_rules;
2888 unsigned int i;
2889 int err = -EINVAL;
2890
2891 mutex_lock(&cfg80211_mutex);
2892
2893 if (!cfg80211_regdomain)
2894 goto out;
2895
2896 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2897 if (!msg) {
2898 err = -ENOBUFS;
2899 goto out;
2900 }
2901
2902 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2903 NL80211_CMD_GET_REG);
2904 if (!hdr)
2905 goto nla_put_failure;
2906
2907 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2908 cfg80211_regdomain->alpha2);
2909
2910 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2911 if (!nl_reg_rules)
2912 goto nla_put_failure;
2913
2914 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2915 struct nlattr *nl_reg_rule;
2916 const struct ieee80211_reg_rule *reg_rule;
2917 const struct ieee80211_freq_range *freq_range;
2918 const struct ieee80211_power_rule *power_rule;
2919
2920 reg_rule = &cfg80211_regdomain->reg_rules[i];
2921 freq_range = &reg_rule->freq_range;
2922 power_rule = &reg_rule->power_rule;
2923
2924 nl_reg_rule = nla_nest_start(msg, i);
2925 if (!nl_reg_rule)
2926 goto nla_put_failure;
2927
2928 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2929 reg_rule->flags);
2930 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2931 freq_range->start_freq_khz);
2932 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2933 freq_range->end_freq_khz);
2934 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2935 freq_range->max_bandwidth_khz);
2936 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2937 power_rule->max_antenna_gain);
2938 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2939 power_rule->max_eirp);
2940
2941 nla_nest_end(msg, nl_reg_rule);
2942 }
2943
2944 nla_nest_end(msg, nl_reg_rules);
2945
2946 genlmsg_end(msg, hdr);
2947 err = genlmsg_reply(msg, info);
2948 goto out;
2949
2950 nla_put_failure:
2951 genlmsg_cancel(msg, hdr);
2952 nlmsg_free(msg);
2953 err = -EMSGSIZE;
2954 out:
2955 mutex_unlock(&cfg80211_mutex);
2956 return err;
2957 }
2958
2959 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2960 {
2961 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2962 struct nlattr *nl_reg_rule;
2963 char *alpha2 = NULL;
2964 int rem_reg_rules = 0, r = 0;
2965 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2966 struct ieee80211_regdomain *rd = NULL;
2967
2968 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2969 return -EINVAL;
2970
2971 if (!info->attrs[NL80211_ATTR_REG_RULES])
2972 return -EINVAL;
2973
2974 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2975
2976 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2977 rem_reg_rules) {
2978 num_rules++;
2979 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2980 return -EINVAL;
2981 }
2982
2983 mutex_lock(&cfg80211_mutex);
2984
2985 if (!reg_is_valid_request(alpha2)) {
2986 r = -EINVAL;
2987 goto bad_reg;
2988 }
2989
2990 size_of_regd = sizeof(struct ieee80211_regdomain) +
2991 (num_rules * sizeof(struct ieee80211_reg_rule));
2992
2993 rd = kzalloc(size_of_regd, GFP_KERNEL);
2994 if (!rd) {
2995 r = -ENOMEM;
2996 goto bad_reg;
2997 }
2998
2999 rd->n_reg_rules = num_rules;
3000 rd->alpha2[0] = alpha2[0];
3001 rd->alpha2[1] = alpha2[1];
3002
3003 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3004 rem_reg_rules) {
3005 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3006 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3007 reg_rule_policy);
3008 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3009 if (r)
3010 goto bad_reg;
3011
3012 rule_idx++;
3013
3014 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3015 r = -EINVAL;
3016 goto bad_reg;
3017 }
3018 }
3019
3020 BUG_ON(rule_idx != num_rules);
3021
3022 r = set_regdom(rd);
3023
3024 mutex_unlock(&cfg80211_mutex);
3025
3026 return r;
3027
3028 bad_reg:
3029 mutex_unlock(&cfg80211_mutex);
3030 kfree(rd);
3031 return r;
3032 }
3033
3034 static int validate_scan_freqs(struct nlattr *freqs)
3035 {
3036 struct nlattr *attr1, *attr2;
3037 int n_channels = 0, tmp1, tmp2;
3038
3039 nla_for_each_nested(attr1, freqs, tmp1) {
3040 n_channels++;
3041 /*
3042 * Some hardware has a limited channel list for
3043 * scanning, and it is pretty much nonsensical
3044 * to scan for a channel twice, so disallow that
3045 * and don't require drivers to check that the
3046 * channel list they get isn't longer than what
3047 * they can scan, as long as they can scan all
3048 * the channels they registered at once.
3049 */
3050 nla_for_each_nested(attr2, freqs, tmp2)
3051 if (attr1 != attr2 &&
3052 nla_get_u32(attr1) == nla_get_u32(attr2))
3053 return 0;
3054 }
3055
3056 return n_channels;
3057 }
3058
3059 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3060 {
3061 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3062 struct net_device *dev = info->user_ptr[1];
3063 struct cfg80211_scan_request *request;
3064 struct cfg80211_ssid *ssid;
3065 struct ieee80211_channel *channel;
3066 struct nlattr *attr;
3067 struct wiphy *wiphy;
3068 int err, tmp, n_ssids = 0, n_channels, i;
3069 enum ieee80211_band band;
3070 size_t ie_len;
3071
3072 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3073 return -EINVAL;
3074
3075 wiphy = &rdev->wiphy;
3076
3077 if (!rdev->ops->scan)
3078 return -EOPNOTSUPP;
3079
3080 if (rdev->scan_req)
3081 return -EBUSY;
3082
3083 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3084 n_channels = validate_scan_freqs(
3085 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3086 if (!n_channels)
3087 return -EINVAL;
3088 } else {
3089 n_channels = 0;
3090
3091 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3092 if (wiphy->bands[band])
3093 n_channels += wiphy->bands[band]->n_channels;
3094 }
3095
3096 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3097 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3098 n_ssids++;
3099
3100 if (n_ssids > wiphy->max_scan_ssids)
3101 return -EINVAL;
3102
3103 if (info->attrs[NL80211_ATTR_IE])
3104 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3105 else
3106 ie_len = 0;
3107
3108 if (ie_len > wiphy->max_scan_ie_len)
3109 return -EINVAL;
3110
3111 request = kzalloc(sizeof(*request)
3112 + sizeof(*ssid) * n_ssids
3113 + sizeof(channel) * n_channels
3114 + ie_len, GFP_KERNEL);
3115 if (!request)
3116 return -ENOMEM;
3117
3118 if (n_ssids)
3119 request->ssids = (void *)&request->channels[n_channels];
3120 request->n_ssids = n_ssids;
3121 if (ie_len) {
3122 if (request->ssids)
3123 request->ie = (void *)(request->ssids + n_ssids);
3124 else
3125 request->ie = (void *)(request->channels + n_channels);
3126 }
3127
3128 i = 0;
3129 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3130 /* user specified, bail out if channel not found */
3131 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3132 struct ieee80211_channel *chan;
3133
3134 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3135
3136 if (!chan) {
3137 err = -EINVAL;
3138 goto out_free;
3139 }
3140
3141 /* ignore disabled channels */
3142 if (chan->flags & IEEE80211_CHAN_DISABLED)
3143 continue;
3144
3145 request->channels[i] = chan;
3146 i++;
3147 }
3148 } else {
3149 /* all channels */
3150 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3151 int j;
3152 if (!wiphy->bands[band])
3153 continue;
3154 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3155 struct ieee80211_channel *chan;
3156
3157 chan = &wiphy->bands[band]->channels[j];
3158
3159 if (chan->flags & IEEE80211_CHAN_DISABLED)
3160 continue;
3161
3162 request->channels[i] = chan;
3163 i++;
3164 }
3165 }
3166 }
3167
3168 if (!i) {
3169 err = -EINVAL;
3170 goto out_free;
3171 }
3172
3173 request->n_channels = i;
3174
3175 i = 0;
3176 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3177 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3178 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3179 err = -EINVAL;
3180 goto out_free;
3181 }
3182 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3183 request->ssids[i].ssid_len = nla_len(attr);
3184 i++;
3185 }
3186 }
3187
3188 if (info->attrs[NL80211_ATTR_IE]) {
3189 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3190 memcpy((void *)request->ie,
3191 nla_data(info->attrs[NL80211_ATTR_IE]),
3192 request->ie_len);
3193 }
3194
3195 request->dev = dev;
3196 request->wiphy = &rdev->wiphy;
3197
3198 rdev->scan_req = request;
3199 err = rdev->ops->scan(&rdev->wiphy, dev, request);
3200
3201 if (!err) {
3202 nl80211_send_scan_start(rdev, dev);
3203 dev_hold(dev);
3204 } else {
3205 out_free:
3206 rdev->scan_req = NULL;
3207 kfree(request);
3208 }
3209
3210 return err;
3211 }
3212
3213 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3214 struct cfg80211_registered_device *rdev,
3215 struct wireless_dev *wdev,
3216 struct cfg80211_internal_bss *intbss)
3217 {
3218 struct cfg80211_bss *res = &intbss->pub;
3219 void *hdr;
3220 struct nlattr *bss;
3221 int i;
3222
3223 ASSERT_WDEV_LOCK(wdev);
3224
3225 hdr = nl80211hdr_put(msg, pid, seq, flags,
3226 NL80211_CMD_NEW_SCAN_RESULTS);
3227 if (!hdr)
3228 return -1;
3229
3230 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3231 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3232
3233 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3234 if (!bss)
3235 goto nla_put_failure;
3236 if (!is_zero_ether_addr(res->bssid))
3237 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3238 if (res->information_elements && res->len_information_elements)
3239 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3240 res->len_information_elements,
3241 res->information_elements);
3242 if (res->beacon_ies && res->len_beacon_ies &&
3243 res->beacon_ies != res->information_elements)
3244 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3245 res->len_beacon_ies, res->beacon_ies);
3246 if (res->tsf)
3247 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3248 if (res->beacon_interval)
3249 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3250 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3251 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3252 NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3253 jiffies_to_msecs(jiffies - intbss->ts));
3254
3255 switch (rdev->wiphy.signal_type) {
3256 case CFG80211_SIGNAL_TYPE_MBM:
3257 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3258 break;
3259 case CFG80211_SIGNAL_TYPE_UNSPEC:
3260 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3261 break;
3262 default:
3263 break;
3264 }
3265
3266 switch (wdev->iftype) {
3267 case NL80211_IFTYPE_P2P_CLIENT:
3268 case NL80211_IFTYPE_STATION:
3269 if (intbss == wdev->current_bss)
3270 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3271 NL80211_BSS_STATUS_ASSOCIATED);
3272 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3273 if (intbss != wdev->auth_bsses[i])
3274 continue;
3275 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3276 NL80211_BSS_STATUS_AUTHENTICATED);
3277 break;
3278 }
3279 break;
3280 case NL80211_IFTYPE_ADHOC:
3281 if (intbss == wdev->current_bss)
3282 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3283 NL80211_BSS_STATUS_IBSS_JOINED);
3284 break;
3285 default:
3286 break;
3287 }
3288
3289 nla_nest_end(msg, bss);
3290
3291 return genlmsg_end(msg, hdr);
3292
3293 nla_put_failure:
3294 genlmsg_cancel(msg, hdr);
3295 return -EMSGSIZE;
3296 }
3297
3298 static int nl80211_dump_scan(struct sk_buff *skb,
3299 struct netlink_callback *cb)
3300 {
3301 struct cfg80211_registered_device *rdev;
3302 struct net_device *dev;
3303 struct cfg80211_internal_bss *scan;
3304 struct wireless_dev *wdev;
3305 int start = cb->args[1], idx = 0;
3306 int err;
3307
3308 err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3309 if (err)
3310 return err;
3311
3312 wdev = dev->ieee80211_ptr;
3313
3314 wdev_lock(wdev);
3315 spin_lock_bh(&rdev->bss_lock);
3316 cfg80211_bss_expire(rdev);
3317
3318 list_for_each_entry(scan, &rdev->bss_list, list) {
3319 if (++idx <= start)
3320 continue;
3321 if (nl80211_send_bss(skb,
3322 NETLINK_CB(cb->skb).pid,
3323 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3324 rdev, wdev, scan) < 0) {
3325 idx--;
3326 break;
3327 }
3328 }
3329
3330 spin_unlock_bh(&rdev->bss_lock);
3331 wdev_unlock(wdev);
3332
3333 cb->args[1] = idx;
3334 nl80211_finish_netdev_dump(rdev);
3335
3336 return skb->len;
3337 }
3338
3339 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3340 int flags, struct net_device *dev,
3341 struct survey_info *survey)
3342 {
3343 void *hdr;
3344 struct nlattr *infoattr;
3345
3346 /* Survey without a channel doesn't make sense */
3347 if (!survey->channel)
3348 return -EINVAL;
3349
3350 hdr = nl80211hdr_put(msg, pid, seq, flags,
3351 NL80211_CMD_NEW_SURVEY_RESULTS);
3352 if (!hdr)
3353 return -ENOMEM;
3354
3355 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3356
3357 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3358 if (!infoattr)
3359 goto nla_put_failure;
3360
3361 NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3362 survey->channel->center_freq);
3363 if (survey->filled & SURVEY_INFO_NOISE_DBM)
3364 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3365 survey->noise);
3366 if (survey->filled & SURVEY_INFO_IN_USE)
3367 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3368 if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3369 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3370 survey->channel_time);
3371 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3372 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3373 survey->channel_time_busy);
3374 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3375 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3376 survey->channel_time_ext_busy);
3377 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3378 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3379 survey->channel_time_rx);
3380 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3381 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3382 survey->channel_time_tx);
3383
3384 nla_nest_end(msg, infoattr);
3385
3386 return genlmsg_end(msg, hdr);
3387
3388 nla_put_failure:
3389 genlmsg_cancel(msg, hdr);
3390 return -EMSGSIZE;
3391 }
3392
3393 static int nl80211_dump_survey(struct sk_buff *skb,
3394 struct netlink_callback *cb)
3395 {
3396 struct survey_info survey;
3397 struct cfg80211_registered_device *dev;
3398 struct net_device *netdev;
3399 int survey_idx = cb->args[1];
3400 int res;
3401
3402 res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3403 if (res)
3404 return res;
3405
3406 if (!dev->ops->dump_survey) {
3407 res = -EOPNOTSUPP;
3408 goto out_err;
3409 }
3410
3411 while (1) {
3412 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3413 &survey);
3414 if (res == -ENOENT)
3415 break;
3416 if (res)
3417 goto out_err;
3418
3419 if (nl80211_send_survey(skb,
3420 NETLINK_CB(cb->skb).pid,
3421 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3422 netdev,
3423 &survey) < 0)
3424 goto out;
3425 survey_idx++;
3426 }
3427
3428 out:
3429 cb->args[1] = survey_idx;
3430 res = skb->len;
3431 out_err:
3432 nl80211_finish_netdev_dump(dev);
3433 return res;
3434 }
3435
3436 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3437 {
3438 return auth_type <= NL80211_AUTHTYPE_MAX;
3439 }
3440
3441 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3442 {
3443 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3444 NL80211_WPA_VERSION_2));
3445 }
3446
3447 static bool nl80211_valid_akm_suite(u32 akm)
3448 {
3449 return akm == WLAN_AKM_SUITE_8021X ||
3450 akm == WLAN_AKM_SUITE_PSK;
3451 }
3452
3453 static bool nl80211_valid_cipher_suite(u32 cipher)
3454 {
3455 return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3456 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3457 cipher == WLAN_CIPHER_SUITE_TKIP ||
3458 cipher == WLAN_CIPHER_SUITE_CCMP ||
3459 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3460 }
3461
3462
3463 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3464 {
3465 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3466 struct net_device *dev = info->user_ptr[1];
3467 struct ieee80211_channel *chan;
3468 const u8 *bssid, *ssid, *ie = NULL;
3469 int err, ssid_len, ie_len = 0;
3470 enum nl80211_auth_type auth_type;
3471 struct key_parse key;
3472 bool local_state_change;
3473
3474 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3475 return -EINVAL;
3476
3477 if (!info->attrs[NL80211_ATTR_MAC])
3478 return -EINVAL;
3479
3480 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3481 return -EINVAL;
3482
3483 if (!info->attrs[NL80211_ATTR_SSID])
3484 return -EINVAL;
3485
3486 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3487 return -EINVAL;
3488
3489 err = nl80211_parse_key(info, &key);
3490 if (err)
3491 return err;
3492
3493 if (key.idx >= 0) {
3494 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3495 return -EINVAL;
3496 if (!key.p.key || !key.p.key_len)
3497 return -EINVAL;
3498 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3499 key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3500 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3501 key.p.key_len != WLAN_KEY_LEN_WEP104))
3502 return -EINVAL;
3503 if (key.idx > 4)
3504 return -EINVAL;
3505 } else {
3506 key.p.key_len = 0;
3507 key.p.key = NULL;
3508 }
3509
3510 if (key.idx >= 0) {
3511 int i;
3512 bool ok = false;
3513 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3514 if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3515 ok = true;
3516 break;
3517 }
3518 }
3519 if (!ok)
3520 return -EINVAL;
3521 }
3522
3523 if (!rdev->ops->auth)
3524 return -EOPNOTSUPP;
3525
3526 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3527 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3528 return -EOPNOTSUPP;
3529
3530 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3531 chan = ieee80211_get_channel(&rdev->wiphy,
3532 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3533 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3534 return -EINVAL;
3535
3536 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3537 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3538
3539 if (info->attrs[NL80211_ATTR_IE]) {
3540 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3541 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3542 }
3543
3544 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3545 if (!nl80211_valid_auth_type(auth_type))
3546 return -EINVAL;
3547
3548 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3549
3550 return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3551 ssid, ssid_len, ie, ie_len,
3552 key.p.key, key.p.key_len, key.idx,
3553 local_state_change);
3554 }
3555
3556 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3557 struct genl_info *info,
3558 struct cfg80211_crypto_settings *settings,
3559 int cipher_limit)
3560 {
3561 memset(settings, 0, sizeof(*settings));
3562
3563 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3564
3565 if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3566 u16 proto;
3567 proto = nla_get_u16(
3568 info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3569 settings->control_port_ethertype = cpu_to_be16(proto);
3570 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3571 proto != ETH_P_PAE)
3572 return -EINVAL;
3573 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3574 settings->control_port_no_encrypt = true;
3575 } else
3576 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3577
3578 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3579 void *data;
3580 int len, i;
3581
3582 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3583 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3584 settings->n_ciphers_pairwise = len / sizeof(u32);
3585
3586 if (len % sizeof(u32))
3587 return -EINVAL;
3588
3589 if (settings->n_ciphers_pairwise > cipher_limit)
3590 return -EINVAL;
3591
3592 memcpy(settings->ciphers_pairwise, data, len);
3593
3594 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3595 if (!nl80211_valid_cipher_suite(
3596 settings->ciphers_pairwise[i]))
3597 return -EINVAL;
3598 }
3599
3600 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3601 settings->cipher_group =
3602 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3603 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3604 return -EINVAL;
3605 }
3606
3607 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3608 settings->wpa_versions =
3609 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3610 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3611 return -EINVAL;
3612 }
3613
3614 if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3615 void *data;
3616 int len, i;
3617
3618 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3619 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3620 settings->n_akm_suites = len / sizeof(u32);
3621
3622 if (len % sizeof(u32))
3623 return -EINVAL;
3624
3625 memcpy(settings->akm_suites, data, len);
3626
3627 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3628 if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3629 return -EINVAL;
3630 }
3631
3632 return 0;
3633 }
3634
3635 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3636 {
3637 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3638 struct net_device *dev = info->user_ptr[1];
3639 struct cfg80211_crypto_settings crypto;
3640 struct ieee80211_channel *chan;
3641 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3642 int err, ssid_len, ie_len = 0;
3643 bool use_mfp = false;
3644
3645 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3646 return -EINVAL;
3647
3648 if (!info->attrs[NL80211_ATTR_MAC] ||
3649 !info->attrs[NL80211_ATTR_SSID] ||
3650 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3651 return -EINVAL;
3652
3653 if (!rdev->ops->assoc)
3654 return -EOPNOTSUPP;
3655
3656 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3657 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3658 return -EOPNOTSUPP;
3659
3660 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3661
3662 chan = ieee80211_get_channel(&rdev->wiphy,
3663 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3664 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3665 return -EINVAL;
3666
3667 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3668 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3669
3670 if (info->attrs[NL80211_ATTR_IE]) {
3671 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3672 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3673 }
3674
3675 if (info->attrs[NL80211_ATTR_USE_MFP]) {
3676 enum nl80211_mfp mfp =
3677 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3678 if (mfp == NL80211_MFP_REQUIRED)
3679 use_mfp = true;
3680 else if (mfp != NL80211_MFP_NO)
3681 return -EINVAL;
3682 }
3683
3684 if (info->attrs[NL80211_ATTR_PREV_BSSID])
3685 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3686
3687 err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3688 if (!err)
3689 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3690 ssid, ssid_len, ie, ie_len, use_mfp,
3691 &crypto);
3692
3693 return err;
3694 }
3695
3696 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3697 {
3698 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3699 struct net_device *dev = info->user_ptr[1];
3700 const u8 *ie = NULL, *bssid;
3701 int ie_len = 0;
3702 u16 reason_code;
3703 bool local_state_change;
3704
3705 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3706 return -EINVAL;
3707
3708 if (!info->attrs[NL80211_ATTR_MAC])
3709 return -EINVAL;
3710
3711 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3712 return -EINVAL;
3713
3714 if (!rdev->ops->deauth)
3715 return -EOPNOTSUPP;
3716
3717 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3718 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3719 return -EOPNOTSUPP;
3720
3721 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3722
3723 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3724 if (reason_code == 0) {
3725 /* Reason Code 0 is reserved */
3726 return -EINVAL;
3727 }
3728
3729 if (info->attrs[NL80211_ATTR_IE]) {
3730 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3731 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3732 }
3733
3734 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3735
3736 return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3737 local_state_change);
3738 }
3739
3740 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3741 {
3742 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3743 struct net_device *dev = info->user_ptr[1];
3744 const u8 *ie = NULL, *bssid;
3745 int ie_len = 0;
3746 u16 reason_code;
3747 bool local_state_change;
3748
3749 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3750 return -EINVAL;
3751
3752 if (!info->attrs[NL80211_ATTR_MAC])
3753 return -EINVAL;
3754
3755 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3756 return -EINVAL;
3757
3758 if (!rdev->ops->disassoc)
3759 return -EOPNOTSUPP;
3760
3761 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3762 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3763 return -EOPNOTSUPP;
3764
3765 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3766
3767 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3768 if (reason_code == 0) {
3769 /* Reason Code 0 is reserved */
3770 return -EINVAL;
3771 }
3772
3773 if (info->attrs[NL80211_ATTR_IE]) {
3774 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3775 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3776 }
3777
3778 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3779
3780 return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3781 local_state_change);
3782 }
3783
3784 static bool
3785 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
3786 int mcast_rate[IEEE80211_NUM_BANDS],
3787 int rateval)
3788 {
3789 struct wiphy *wiphy = &rdev->wiphy;
3790 bool found = false;
3791 int band, i;
3792
3793 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3794 struct ieee80211_supported_band *sband;
3795
3796 sband = wiphy->bands[band];
3797 if (!sband)
3798 continue;
3799
3800 for (i = 0; i < sband->n_bitrates; i++) {
3801 if (sband->bitrates[i].bitrate == rateval) {
3802 mcast_rate[band] = i + 1;
3803 found = true;
3804 break;
3805 }
3806 }
3807 }
3808
3809 return found;
3810 }
3811
3812 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3813 {
3814 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3815 struct net_device *dev = info->user_ptr[1];
3816 struct cfg80211_ibss_params ibss;
3817 struct wiphy *wiphy;
3818 struct cfg80211_cached_keys *connkeys = NULL;
3819 int err;
3820
3821 memset(&ibss, 0, sizeof(ibss));
3822
3823 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3824 return -EINVAL;
3825
3826 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3827 !info->attrs[NL80211_ATTR_SSID] ||
3828 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3829 return -EINVAL;
3830
3831 ibss.beacon_interval = 100;
3832
3833 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3834 ibss.beacon_interval =
3835 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3836 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3837 return -EINVAL;
3838 }
3839
3840 if (!rdev->ops->join_ibss)
3841 return -EOPNOTSUPP;
3842
3843 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3844 return -EOPNOTSUPP;
3845
3846 wiphy = &rdev->wiphy;
3847
3848 if (info->attrs[NL80211_ATTR_MAC])
3849 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3850 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3851 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3852
3853 if (info->attrs[NL80211_ATTR_IE]) {
3854 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3855 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3856 }
3857
3858 ibss.channel = ieee80211_get_channel(wiphy,
3859 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3860 if (!ibss.channel ||
3861 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3862 ibss.channel->flags & IEEE80211_CHAN_DISABLED)
3863 return -EINVAL;
3864
3865 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3866 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3867
3868 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3869 u8 *rates =
3870 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3871 int n_rates =
3872 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3873 struct ieee80211_supported_band *sband =
3874 wiphy->bands[ibss.channel->band];
3875 int i, j;
3876
3877 if (n_rates == 0)
3878 return -EINVAL;
3879
3880 for (i = 0; i < n_rates; i++) {
3881 int rate = (rates[i] & 0x7f) * 5;
3882 bool found = false;
3883
3884 for (j = 0; j < sband->n_bitrates; j++) {
3885 if (sband->bitrates[j].bitrate == rate) {
3886 found = true;
3887 ibss.basic_rates |= BIT(j);
3888 break;
3889 }
3890 }
3891 if (!found)
3892 return -EINVAL;
3893 }
3894 }
3895
3896 if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
3897 !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
3898 nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
3899 return -EINVAL;
3900
3901 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3902 connkeys = nl80211_parse_connkeys(rdev,
3903 info->attrs[NL80211_ATTR_KEYS]);
3904 if (IS_ERR(connkeys))
3905 return PTR_ERR(connkeys);
3906 }
3907
3908 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3909 if (err)
3910 kfree(connkeys);
3911 return err;
3912 }
3913
3914 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3915 {
3916 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3917 struct net_device *dev = info->user_ptr[1];
3918
3919 if (!rdev->ops->leave_ibss)
3920 return -EOPNOTSUPP;
3921
3922 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3923 return -EOPNOTSUPP;
3924
3925 return cfg80211_leave_ibss(rdev, dev, false);
3926 }
3927
3928 #ifdef CONFIG_NL80211_TESTMODE
3929 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3930 .name = "testmode",
3931 };
3932
3933 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3934 {
3935 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3936 int err;
3937
3938 if (!info->attrs[NL80211_ATTR_TESTDATA])
3939 return -EINVAL;
3940
3941 err = -EOPNOTSUPP;
3942 if (rdev->ops->testmode_cmd) {
3943 rdev->testmode_info = info;
3944 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3945 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3946 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3947 rdev->testmode_info = NULL;
3948 }
3949
3950 return err;
3951 }
3952
3953 static struct sk_buff *
3954 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3955 int approxlen, u32 pid, u32 seq, gfp_t gfp)
3956 {
3957 struct sk_buff *skb;
3958 void *hdr;
3959 struct nlattr *data;
3960
3961 skb = nlmsg_new(approxlen + 100, gfp);
3962 if (!skb)
3963 return NULL;
3964
3965 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3966 if (!hdr) {
3967 kfree_skb(skb);
3968 return NULL;
3969 }
3970
3971 NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3972 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3973
3974 ((void **)skb->cb)[0] = rdev;
3975 ((void **)skb->cb)[1] = hdr;
3976 ((void **)skb->cb)[2] = data;
3977
3978 return skb;
3979
3980 nla_put_failure:
3981 kfree_skb(skb);
3982 return NULL;
3983 }
3984
3985 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3986 int approxlen)
3987 {
3988 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3989
3990 if (WARN_ON(!rdev->testmode_info))
3991 return NULL;
3992
3993 return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3994 rdev->testmode_info->snd_pid,
3995 rdev->testmode_info->snd_seq,
3996 GFP_KERNEL);
3997 }
3998 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3999
4000 int cfg80211_testmode_reply(struct sk_buff *skb)
4001 {
4002 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4003 void *hdr = ((void **)skb->cb)[1];
4004 struct nlattr *data = ((void **)skb->cb)[2];
4005
4006 if (WARN_ON(!rdev->testmode_info)) {
4007 kfree_skb(skb);
4008 return -EINVAL;
4009 }
4010
4011 nla_nest_end(skb, data);
4012 genlmsg_end(skb, hdr);
4013 return genlmsg_reply(skb, rdev->testmode_info);
4014 }
4015 EXPORT_SYMBOL(cfg80211_testmode_reply);
4016
4017 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4018 int approxlen, gfp_t gfp)
4019 {
4020 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4021
4022 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4023 }
4024 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4025
4026 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4027 {
4028 void *hdr = ((void **)skb->cb)[1];
4029 struct nlattr *data = ((void **)skb->cb)[2];
4030
4031 nla_nest_end(skb, data);
4032 genlmsg_end(skb, hdr);
4033 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4034 }
4035 EXPORT_SYMBOL(cfg80211_testmode_event);
4036 #endif
4037
4038 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4039 {
4040 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4041 struct net_device *dev = info->user_ptr[1];
4042 struct cfg80211_connect_params connect;
4043 struct wiphy *wiphy;
4044 struct cfg80211_cached_keys *connkeys = NULL;
4045 int err;
4046
4047 memset(&connect, 0, sizeof(connect));
4048
4049 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4050 return -EINVAL;
4051
4052 if (!info->attrs[NL80211_ATTR_SSID] ||
4053 !nla_len(info->attrs[NL80211_ATTR_SSID]))
4054 return -EINVAL;
4055
4056 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4057 connect.auth_type =
4058 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4059 if (!nl80211_valid_auth_type(connect.auth_type))
4060 return -EINVAL;
4061 } else
4062 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4063
4064 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4065
4066 err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4067 NL80211_MAX_NR_CIPHER_SUITES);
4068 if (err)
4069 return err;
4070
4071 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4072 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4073 return -EOPNOTSUPP;
4074
4075 wiphy = &rdev->wiphy;
4076
4077 if (info->attrs[NL80211_ATTR_MAC])
4078 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4079 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4080 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4081
4082 if (info->attrs[NL80211_ATTR_IE]) {
4083 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4084 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4085 }
4086
4087 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4088 connect.channel =
4089 ieee80211_get_channel(wiphy,
4090 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4091 if (!connect.channel ||
4092 connect.channel->flags & IEEE80211_CHAN_DISABLED)
4093 return -EINVAL;
4094 }
4095
4096 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4097 connkeys = nl80211_parse_connkeys(rdev,
4098 info->attrs[NL80211_ATTR_KEYS]);
4099 if (IS_ERR(connkeys))
4100 return PTR_ERR(connkeys);
4101 }
4102
4103 err = cfg80211_connect(rdev, dev, &connect, connkeys);
4104 if (err)
4105 kfree(connkeys);
4106 return err;
4107 }
4108
4109 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4110 {
4111 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4112 struct net_device *dev = info->user_ptr[1];
4113 u16 reason;
4114
4115 if (!info->attrs[NL80211_ATTR_REASON_CODE])
4116 reason = WLAN_REASON_DEAUTH_LEAVING;
4117 else
4118 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4119
4120 if (reason == 0)
4121 return -EINVAL;
4122
4123 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4124 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4125 return -EOPNOTSUPP;
4126
4127 return cfg80211_disconnect(rdev, dev, reason, true);
4128 }
4129
4130 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4131 {
4132 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4133 struct net *net;
4134 int err;
4135 u32 pid;
4136
4137 if (!info->attrs[NL80211_ATTR_PID])
4138 return -EINVAL;
4139
4140 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4141
4142 net = get_net_ns_by_pid(pid);
4143 if (IS_ERR(net))
4144 return PTR_ERR(net);
4145
4146 err = 0;
4147
4148 /* check if anything to do */
4149 if (!net_eq(wiphy_net(&rdev->wiphy), net))
4150 err = cfg80211_switch_netns(rdev, net);
4151
4152 put_net(net);
4153 return err;
4154 }
4155
4156 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4157 {
4158 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4159 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4160 struct cfg80211_pmksa *pmksa) = NULL;
4161 struct net_device *dev = info->user_ptr[1];
4162 struct cfg80211_pmksa pmksa;
4163
4164 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4165
4166 if (!info->attrs[NL80211_ATTR_MAC])
4167 return -EINVAL;
4168
4169 if (!info->attrs[NL80211_ATTR_PMKID])
4170 return -EINVAL;
4171
4172 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4173 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4174
4175 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4176 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4177 return -EOPNOTSUPP;
4178
4179 switch (info->genlhdr->cmd) {
4180 case NL80211_CMD_SET_PMKSA:
4181 rdev_ops = rdev->ops->set_pmksa;
4182 break;
4183 case NL80211_CMD_DEL_PMKSA:
4184 rdev_ops = rdev->ops->del_pmksa;
4185 break;
4186 default:
4187 WARN_ON(1);
4188 break;
4189 }
4190
4191 if (!rdev_ops)
4192 return -EOPNOTSUPP;
4193
4194 return rdev_ops(&rdev->wiphy, dev, &pmksa);
4195 }
4196
4197 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4198 {
4199 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4200 struct net_device *dev = info->user_ptr[1];
4201
4202 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4203 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4204 return -EOPNOTSUPP;
4205
4206 if (!rdev->ops->flush_pmksa)
4207 return -EOPNOTSUPP;
4208
4209 return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4210 }
4211
4212 static int nl80211_remain_on_channel(struct sk_buff *skb,
4213 struct genl_info *info)
4214 {
4215 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4216 struct net_device *dev = info->user_ptr[1];
4217 struct ieee80211_channel *chan;
4218 struct sk_buff *msg;
4219 void *hdr;
4220 u64 cookie;
4221 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4222 u32 freq, duration;
4223 int err;
4224
4225 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4226 !info->attrs[NL80211_ATTR_DURATION])
4227 return -EINVAL;
4228
4229 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4230
4231 /*
4232 * We should be on that channel for at least one jiffie,
4233 * and more than 5 seconds seems excessive.
4234 */
4235 if (!duration || !msecs_to_jiffies(duration) ||
4236 duration > rdev->wiphy.max_remain_on_channel_duration)
4237 return -EINVAL;
4238
4239 if (!rdev->ops->remain_on_channel)
4240 return -EOPNOTSUPP;
4241
4242 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4243 channel_type = nla_get_u32(
4244 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4245 if (channel_type != NL80211_CHAN_NO_HT &&
4246 channel_type != NL80211_CHAN_HT20 &&
4247 channel_type != NL80211_CHAN_HT40PLUS &&
4248 channel_type != NL80211_CHAN_HT40MINUS)
4249 return -EINVAL;
4250 }
4251
4252 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4253 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4254 if (chan == NULL)
4255 return -EINVAL;
4256
4257 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4258 if (!msg)
4259 return -ENOMEM;
4260
4261 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4262 NL80211_CMD_REMAIN_ON_CHANNEL);
4263
4264 if (IS_ERR(hdr)) {
4265 err = PTR_ERR(hdr);
4266 goto free_msg;
4267 }
4268
4269 err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4270 channel_type, duration, &cookie);
4271
4272 if (err)
4273 goto free_msg;
4274
4275 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4276
4277 genlmsg_end(msg, hdr);
4278
4279 return genlmsg_reply(msg, info);
4280
4281 nla_put_failure:
4282 err = -ENOBUFS;
4283 free_msg:
4284 nlmsg_free(msg);
4285 return err;
4286 }
4287
4288 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4289 struct genl_info *info)
4290 {
4291 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4292 struct net_device *dev = info->user_ptr[1];
4293 u64 cookie;
4294
4295 if (!info->attrs[NL80211_ATTR_COOKIE])
4296 return -EINVAL;
4297
4298 if (!rdev->ops->cancel_remain_on_channel)
4299 return -EOPNOTSUPP;
4300
4301 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4302
4303 return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4304 }
4305
4306 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4307 u8 *rates, u8 rates_len)
4308 {
4309 u8 i;
4310 u32 mask = 0;
4311
4312 for (i = 0; i < rates_len; i++) {
4313 int rate = (rates[i] & 0x7f) * 5;
4314 int ridx;
4315 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4316 struct ieee80211_rate *srate =
4317 &sband->bitrates[ridx];
4318 if (rate == srate->bitrate) {
4319 mask |= 1 << ridx;
4320 break;
4321 }
4322 }
4323 if (ridx == sband->n_bitrates)
4324 return 0; /* rate not found */
4325 }
4326
4327 return mask;
4328 }
4329
4330 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4331 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4332 .len = NL80211_MAX_SUPP_RATES },
4333 };
4334
4335 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4336 struct genl_info *info)
4337 {
4338 struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4339 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4340 struct cfg80211_bitrate_mask mask;
4341 int rem, i;
4342 struct net_device *dev = info->user_ptr[1];
4343 struct nlattr *tx_rates;
4344 struct ieee80211_supported_band *sband;
4345
4346 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4347 return -EINVAL;
4348
4349 if (!rdev->ops->set_bitrate_mask)
4350 return -EOPNOTSUPP;
4351
4352 memset(&mask, 0, sizeof(mask));
4353 /* Default to all rates enabled */
4354 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4355 sband = rdev->wiphy.bands[i];
4356 mask.control[i].legacy =
4357 sband ? (1 << sband->n_bitrates) - 1 : 0;
4358 }
4359
4360 /*
4361 * The nested attribute uses enum nl80211_band as the index. This maps
4362 * directly to the enum ieee80211_band values used in cfg80211.
4363 */
4364 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4365 {
4366 enum ieee80211_band band = nla_type(tx_rates);
4367 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4368 return -EINVAL;
4369 sband = rdev->wiphy.bands[band];
4370 if (sband == NULL)
4371 return -EINVAL;
4372 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4373 nla_len(tx_rates), nl80211_txattr_policy);
4374 if (tb[NL80211_TXRATE_LEGACY]) {
4375 mask.control[band].legacy = rateset_to_mask(
4376 sband,
4377 nla_data(tb[NL80211_TXRATE_LEGACY]),
4378 nla_len(tb[NL80211_TXRATE_LEGACY]));
4379 if (mask.control[band].legacy == 0)
4380 return -EINVAL;
4381 }
4382 }
4383
4384 return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4385 }
4386
4387 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4388 {
4389 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4390 struct net_device *dev = info->user_ptr[1];
4391 u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4392
4393 if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4394 return -EINVAL;
4395
4396 if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4397 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4398
4399 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4400 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4401 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4402 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4403 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4404 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4405 return -EOPNOTSUPP;
4406
4407 /* not much point in registering if we can't reply */
4408 if (!rdev->ops->mgmt_tx)
4409 return -EOPNOTSUPP;
4410
4411 return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4412 frame_type,
4413 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4414 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4415 }
4416
4417 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4418 {
4419 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4420 struct net_device *dev = info->user_ptr[1];
4421 struct ieee80211_channel *chan;
4422 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4423 bool channel_type_valid = false;
4424 u32 freq;
4425 int err;
4426 void *hdr;
4427 u64 cookie;
4428 struct sk_buff *msg;
4429 unsigned int wait = 0;
4430 bool offchan;
4431
4432 if (!info->attrs[NL80211_ATTR_FRAME] ||
4433 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4434 return -EINVAL;
4435
4436 if (!rdev->ops->mgmt_tx)
4437 return -EOPNOTSUPP;
4438
4439 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4440 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4441 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4442 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4443 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4444 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4445 return -EOPNOTSUPP;
4446
4447 if (info->attrs[NL80211_ATTR_DURATION]) {
4448 if (!rdev->ops->mgmt_tx_cancel_wait)
4449 return -EINVAL;
4450 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4451 }
4452
4453 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4454 channel_type = nla_get_u32(
4455 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4456 if (channel_type != NL80211_CHAN_NO_HT &&
4457 channel_type != NL80211_CHAN_HT20 &&
4458 channel_type != NL80211_CHAN_HT40PLUS &&
4459 channel_type != NL80211_CHAN_HT40MINUS)
4460 return -EINVAL;
4461 channel_type_valid = true;
4462 }
4463
4464 offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4465
4466 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4467 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4468 if (chan == NULL)
4469 return -EINVAL;
4470
4471 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4472 if (!msg)
4473 return -ENOMEM;
4474
4475 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4476 NL80211_CMD_FRAME);
4477
4478 if (IS_ERR(hdr)) {
4479 err = PTR_ERR(hdr);
4480 goto free_msg;
4481 }
4482 err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4483 channel_type_valid, wait,
4484 nla_data(info->attrs[NL80211_ATTR_FRAME]),
4485 nla_len(info->attrs[NL80211_ATTR_FRAME]),
4486 &cookie);
4487 if (err)
4488 goto free_msg;
4489
4490 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4491
4492 genlmsg_end(msg, hdr);
4493 return genlmsg_reply(msg, info);
4494
4495 nla_put_failure:
4496 err = -ENOBUFS;
4497 free_msg:
4498 nlmsg_free(msg);
4499 return err;
4500 }
4501
4502 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
4503 {
4504 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4505 struct net_device *dev = info->user_ptr[1];
4506 u64 cookie;
4507
4508 if (!info->attrs[NL80211_ATTR_COOKIE])
4509 return -EINVAL;
4510
4511 if (!rdev->ops->mgmt_tx_cancel_wait)
4512 return -EOPNOTSUPP;
4513
4514 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4515 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4516 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4517 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4518 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4519 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4520 return -EOPNOTSUPP;
4521
4522 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4523
4524 return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
4525 }
4526
4527 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4528 {
4529 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4530 struct wireless_dev *wdev;
4531 struct net_device *dev = info->user_ptr[1];
4532 u8 ps_state;
4533 bool state;
4534 int err;
4535
4536 if (!info->attrs[NL80211_ATTR_PS_STATE])
4537 return -EINVAL;
4538
4539 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4540
4541 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4542 return -EINVAL;
4543
4544 wdev = dev->ieee80211_ptr;
4545
4546 if (!rdev->ops->set_power_mgmt)
4547 return -EOPNOTSUPP;
4548
4549 state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4550
4551 if (state == wdev->ps)
4552 return 0;
4553
4554 err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4555 wdev->ps_timeout);
4556 if (!err)
4557 wdev->ps = state;
4558 return err;
4559 }
4560
4561 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4562 {
4563 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4564 enum nl80211_ps_state ps_state;
4565 struct wireless_dev *wdev;
4566 struct net_device *dev = info->user_ptr[1];
4567 struct sk_buff *msg;
4568 void *hdr;
4569 int err;
4570
4571 wdev = dev->ieee80211_ptr;
4572
4573 if (!rdev->ops->set_power_mgmt)
4574 return -EOPNOTSUPP;
4575
4576 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4577 if (!msg)
4578 return -ENOMEM;
4579
4580 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4581 NL80211_CMD_GET_POWER_SAVE);
4582 if (!hdr) {
4583 err = -ENOBUFS;
4584 goto free_msg;
4585 }
4586
4587 if (wdev->ps)
4588 ps_state = NL80211_PS_ENABLED;
4589 else
4590 ps_state = NL80211_PS_DISABLED;
4591
4592 NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4593
4594 genlmsg_end(msg, hdr);
4595 return genlmsg_reply(msg, info);
4596
4597 nla_put_failure:
4598 err = -ENOBUFS;
4599 free_msg:
4600 nlmsg_free(msg);
4601 return err;
4602 }
4603
4604 static struct nla_policy
4605 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4606 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4607 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4608 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4609 };
4610
4611 static int nl80211_set_cqm_rssi(struct genl_info *info,
4612 s32 threshold, u32 hysteresis)
4613 {
4614 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4615 struct wireless_dev *wdev;
4616 struct net_device *dev = info->user_ptr[1];
4617
4618 if (threshold > 0)
4619 return -EINVAL;
4620
4621 wdev = dev->ieee80211_ptr;
4622
4623 if (!rdev->ops->set_cqm_rssi_config)
4624 return -EOPNOTSUPP;
4625
4626 if (wdev->iftype != NL80211_IFTYPE_STATION &&
4627 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4628 return -EOPNOTSUPP;
4629
4630 return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4631 threshold, hysteresis);
4632 }
4633
4634 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4635 {
4636 struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4637 struct nlattr *cqm;
4638 int err;
4639
4640 cqm = info->attrs[NL80211_ATTR_CQM];
4641 if (!cqm) {
4642 err = -EINVAL;
4643 goto out;
4644 }
4645
4646 err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4647 nl80211_attr_cqm_policy);
4648 if (err)
4649 goto out;
4650
4651 if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4652 attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4653 s32 threshold;
4654 u32 hysteresis;
4655 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4656 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4657 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4658 } else
4659 err = -EINVAL;
4660
4661 out:
4662 return err;
4663 }
4664
4665 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
4666 {
4667 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4668 struct net_device *dev = info->user_ptr[1];
4669 struct mesh_config cfg;
4670 int err;
4671
4672 /* start with default */
4673 memcpy(&cfg, &default_mesh_config, sizeof(cfg));
4674
4675 if (info->attrs[NL80211_ATTR_MESH_PARAMS]) {
4676 /* and parse parameters if given */
4677 err = nl80211_parse_mesh_params(info, &cfg, NULL);
4678 if (err)
4679 return err;
4680 }
4681
4682 if (!info->attrs[NL80211_ATTR_MESH_ID] ||
4683 !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
4684 return -EINVAL;
4685
4686 return cfg80211_join_mesh(rdev, dev,
4687 nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
4688 nla_len(info->attrs[NL80211_ATTR_MESH_ID]),
4689 &cfg);
4690 }
4691
4692 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
4693 {
4694 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4695 struct net_device *dev = info->user_ptr[1];
4696
4697 return cfg80211_leave_mesh(rdev, dev);
4698 }
4699
4700 #define NL80211_FLAG_NEED_WIPHY 0x01
4701 #define NL80211_FLAG_NEED_NETDEV 0x02
4702 #define NL80211_FLAG_NEED_RTNL 0x04
4703 #define NL80211_FLAG_CHECK_NETDEV_UP 0x08
4704 #define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\
4705 NL80211_FLAG_CHECK_NETDEV_UP)
4706
4707 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
4708 struct genl_info *info)
4709 {
4710 struct cfg80211_registered_device *rdev;
4711 struct net_device *dev;
4712 int err;
4713 bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
4714
4715 if (rtnl)
4716 rtnl_lock();
4717
4718 if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
4719 rdev = cfg80211_get_dev_from_info(info);
4720 if (IS_ERR(rdev)) {
4721 if (rtnl)
4722 rtnl_unlock();
4723 return PTR_ERR(rdev);
4724 }
4725 info->user_ptr[0] = rdev;
4726 } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
4727 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4728 if (err) {
4729 if (rtnl)
4730 rtnl_unlock();
4731 return err;
4732 }
4733 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
4734 !netif_running(dev)) {
4735 cfg80211_unlock_rdev(rdev);
4736 dev_put(dev);
4737 if (rtnl)
4738 rtnl_unlock();
4739 return -ENETDOWN;
4740 }
4741 info->user_ptr[0] = rdev;
4742 info->user_ptr[1] = dev;
4743 }
4744
4745 return 0;
4746 }
4747
4748 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
4749 struct genl_info *info)
4750 {
4751 if (info->user_ptr[0])
4752 cfg80211_unlock_rdev(info->user_ptr[0]);
4753 if (info->user_ptr[1])
4754 dev_put(info->user_ptr[1]);
4755 if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
4756 rtnl_unlock();
4757 }
4758
4759 static struct genl_ops nl80211_ops[] = {
4760 {
4761 .cmd = NL80211_CMD_GET_WIPHY,
4762 .doit = nl80211_get_wiphy,
4763 .dumpit = nl80211_dump_wiphy,
4764 .policy = nl80211_policy,
4765 /* can be retrieved by unprivileged users */
4766 .internal_flags = NL80211_FLAG_NEED_WIPHY,
4767 },
4768 {
4769 .cmd = NL80211_CMD_SET_WIPHY,
4770 .doit = nl80211_set_wiphy,
4771 .policy = nl80211_policy,
4772 .flags = GENL_ADMIN_PERM,
4773 .internal_flags = NL80211_FLAG_NEED_RTNL,
4774 },
4775 {
4776 .cmd = NL80211_CMD_GET_INTERFACE,
4777 .doit = nl80211_get_interface,
4778 .dumpit = nl80211_dump_interface,
4779 .policy = nl80211_policy,
4780 /* can be retrieved by unprivileged users */
4781 .internal_flags = NL80211_FLAG_NEED_NETDEV,
4782 },
4783 {
4784 .cmd = NL80211_CMD_SET_INTERFACE,
4785 .doit = nl80211_set_interface,
4786 .policy = nl80211_policy,
4787 .flags = GENL_ADMIN_PERM,
4788 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4789 NL80211_FLAG_NEED_RTNL,
4790 },
4791 {
4792 .cmd = NL80211_CMD_NEW_INTERFACE,
4793 .doit = nl80211_new_interface,
4794 .policy = nl80211_policy,
4795 .flags = GENL_ADMIN_PERM,
4796 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4797 NL80211_FLAG_NEED_RTNL,
4798 },
4799 {
4800 .cmd = NL80211_CMD_DEL_INTERFACE,
4801 .doit = nl80211_del_interface,
4802 .policy = nl80211_policy,
4803 .flags = GENL_ADMIN_PERM,
4804 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4805 NL80211_FLAG_NEED_RTNL,
4806 },
4807 {
4808 .cmd = NL80211_CMD_GET_KEY,
4809 .doit = nl80211_get_key,
4810 .policy = nl80211_policy,
4811 .flags = GENL_ADMIN_PERM,
4812 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4813 NL80211_FLAG_NEED_RTNL,
4814 },
4815 {
4816 .cmd = NL80211_CMD_SET_KEY,
4817 .doit = nl80211_set_key,
4818 .policy = nl80211_policy,
4819 .flags = GENL_ADMIN_PERM,
4820 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4821 NL80211_FLAG_NEED_RTNL,
4822 },
4823 {
4824 .cmd = NL80211_CMD_NEW_KEY,
4825 .doit = nl80211_new_key,
4826 .policy = nl80211_policy,
4827 .flags = GENL_ADMIN_PERM,
4828 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4829 NL80211_FLAG_NEED_RTNL,
4830 },
4831 {
4832 .cmd = NL80211_CMD_DEL_KEY,
4833 .doit = nl80211_del_key,
4834 .policy = nl80211_policy,
4835 .flags = GENL_ADMIN_PERM,
4836 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4837 NL80211_FLAG_NEED_RTNL,
4838 },
4839 {
4840 .cmd = NL80211_CMD_SET_BEACON,
4841 .policy = nl80211_policy,
4842 .flags = GENL_ADMIN_PERM,
4843 .doit = nl80211_addset_beacon,
4844 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4845 NL80211_FLAG_NEED_RTNL,
4846 },
4847 {
4848 .cmd = NL80211_CMD_NEW_BEACON,
4849 .policy = nl80211_policy,
4850 .flags = GENL_ADMIN_PERM,
4851 .doit = nl80211_addset_beacon,
4852 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4853 NL80211_FLAG_NEED_RTNL,
4854 },
4855 {
4856 .cmd = NL80211_CMD_DEL_BEACON,
4857 .policy = nl80211_policy,
4858 .flags = GENL_ADMIN_PERM,
4859 .doit = nl80211_del_beacon,
4860 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4861 NL80211_FLAG_NEED_RTNL,
4862 },
4863 {
4864 .cmd = NL80211_CMD_GET_STATION,
4865 .doit = nl80211_get_station,
4866 .dumpit = nl80211_dump_station,
4867 .policy = nl80211_policy,
4868 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4869 NL80211_FLAG_NEED_RTNL,
4870 },
4871 {
4872 .cmd = NL80211_CMD_SET_STATION,
4873 .doit = nl80211_set_station,
4874 .policy = nl80211_policy,
4875 .flags = GENL_ADMIN_PERM,
4876 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4877 NL80211_FLAG_NEED_RTNL,
4878 },
4879 {
4880 .cmd = NL80211_CMD_NEW_STATION,
4881 .doit = nl80211_new_station,
4882 .policy = nl80211_policy,
4883 .flags = GENL_ADMIN_PERM,
4884 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4885 NL80211_FLAG_NEED_RTNL,
4886 },
4887 {
4888 .cmd = NL80211_CMD_DEL_STATION,
4889 .doit = nl80211_del_station,
4890 .policy = nl80211_policy,
4891 .flags = GENL_ADMIN_PERM,
4892 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4893 NL80211_FLAG_NEED_RTNL,
4894 },
4895 {
4896 .cmd = NL80211_CMD_GET_MPATH,
4897 .doit = nl80211_get_mpath,
4898 .dumpit = nl80211_dump_mpath,
4899 .policy = nl80211_policy,
4900 .flags = GENL_ADMIN_PERM,
4901 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4902 NL80211_FLAG_NEED_RTNL,
4903 },
4904 {
4905 .cmd = NL80211_CMD_SET_MPATH,
4906 .doit = nl80211_set_mpath,
4907 .policy = nl80211_policy,
4908 .flags = GENL_ADMIN_PERM,
4909 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4910 NL80211_FLAG_NEED_RTNL,
4911 },
4912 {
4913 .cmd = NL80211_CMD_NEW_MPATH,
4914 .doit = nl80211_new_mpath,
4915 .policy = nl80211_policy,
4916 .flags = GENL_ADMIN_PERM,
4917 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4918 NL80211_FLAG_NEED_RTNL,
4919 },
4920 {
4921 .cmd = NL80211_CMD_DEL_MPATH,
4922 .doit = nl80211_del_mpath,
4923 .policy = nl80211_policy,
4924 .flags = GENL_ADMIN_PERM,
4925 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4926 NL80211_FLAG_NEED_RTNL,
4927 },
4928 {
4929 .cmd = NL80211_CMD_SET_BSS,
4930 .doit = nl80211_set_bss,
4931 .policy = nl80211_policy,
4932 .flags = GENL_ADMIN_PERM,
4933 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4934 NL80211_FLAG_NEED_RTNL,
4935 },
4936 {
4937 .cmd = NL80211_CMD_GET_REG,
4938 .doit = nl80211_get_reg,
4939 .policy = nl80211_policy,
4940 /* can be retrieved by unprivileged users */
4941 },
4942 {
4943 .cmd = NL80211_CMD_SET_REG,
4944 .doit = nl80211_set_reg,
4945 .policy = nl80211_policy,
4946 .flags = GENL_ADMIN_PERM,
4947 },
4948 {
4949 .cmd = NL80211_CMD_REQ_SET_REG,
4950 .doit = nl80211_req_set_reg,
4951 .policy = nl80211_policy,
4952 .flags = GENL_ADMIN_PERM,
4953 },
4954 {
4955 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4956 .doit = nl80211_get_mesh_params,
4957 .policy = nl80211_policy,
4958 /* can be retrieved by unprivileged users */
4959 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4960 NL80211_FLAG_NEED_RTNL,
4961 },
4962 {
4963 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4964 .doit = nl80211_update_mesh_params,
4965 .policy = nl80211_policy,
4966 .flags = GENL_ADMIN_PERM,
4967 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4968 NL80211_FLAG_NEED_RTNL,
4969 },
4970 {
4971 .cmd = NL80211_CMD_TRIGGER_SCAN,
4972 .doit = nl80211_trigger_scan,
4973 .policy = nl80211_policy,
4974 .flags = GENL_ADMIN_PERM,
4975 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4976 NL80211_FLAG_NEED_RTNL,
4977 },
4978 {
4979 .cmd = NL80211_CMD_GET_SCAN,
4980 .policy = nl80211_policy,
4981 .dumpit = nl80211_dump_scan,
4982 },
4983 {
4984 .cmd = NL80211_CMD_AUTHENTICATE,
4985 .doit = nl80211_authenticate,
4986 .policy = nl80211_policy,
4987 .flags = GENL_ADMIN_PERM,
4988 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4989 NL80211_FLAG_NEED_RTNL,
4990 },
4991 {
4992 .cmd = NL80211_CMD_ASSOCIATE,
4993 .doit = nl80211_associate,
4994 .policy = nl80211_policy,
4995 .flags = GENL_ADMIN_PERM,
4996 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4997 NL80211_FLAG_NEED_RTNL,
4998 },
4999 {
5000 .cmd = NL80211_CMD_DEAUTHENTICATE,
5001 .doit = nl80211_deauthenticate,
5002 .policy = nl80211_policy,
5003 .flags = GENL_ADMIN_PERM,
5004 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5005 NL80211_FLAG_NEED_RTNL,
5006 },
5007 {
5008 .cmd = NL80211_CMD_DISASSOCIATE,
5009 .doit = nl80211_disassociate,
5010 .policy = nl80211_policy,
5011 .flags = GENL_ADMIN_PERM,
5012 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5013 NL80211_FLAG_NEED_RTNL,
5014 },
5015 {
5016 .cmd = NL80211_CMD_JOIN_IBSS,
5017 .doit = nl80211_join_ibss,
5018 .policy = nl80211_policy,
5019 .flags = GENL_ADMIN_PERM,
5020 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5021 NL80211_FLAG_NEED_RTNL,
5022 },
5023 {
5024 .cmd = NL80211_CMD_LEAVE_IBSS,
5025 .doit = nl80211_leave_ibss,
5026 .policy = nl80211_policy,
5027 .flags = GENL_ADMIN_PERM,
5028 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5029 NL80211_FLAG_NEED_RTNL,
5030 },
5031 #ifdef CONFIG_NL80211_TESTMODE
5032 {
5033 .cmd = NL80211_CMD_TESTMODE,
5034 .doit = nl80211_testmode_do,
5035 .policy = nl80211_policy,
5036 .flags = GENL_ADMIN_PERM,
5037 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5038 NL80211_FLAG_NEED_RTNL,
5039 },
5040 #endif
5041 {
5042 .cmd = NL80211_CMD_CONNECT,
5043 .doit = nl80211_connect,
5044 .policy = nl80211_policy,
5045 .flags = GENL_ADMIN_PERM,
5046 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5047 NL80211_FLAG_NEED_RTNL,
5048 },
5049 {
5050 .cmd = NL80211_CMD_DISCONNECT,
5051 .doit = nl80211_disconnect,
5052 .policy = nl80211_policy,
5053 .flags = GENL_ADMIN_PERM,
5054 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5055 NL80211_FLAG_NEED_RTNL,
5056 },
5057 {
5058 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5059 .doit = nl80211_wiphy_netns,
5060 .policy = nl80211_policy,
5061 .flags = GENL_ADMIN_PERM,
5062 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5063 NL80211_FLAG_NEED_RTNL,
5064 },
5065 {
5066 .cmd = NL80211_CMD_GET_SURVEY,
5067 .policy = nl80211_policy,
5068 .dumpit = nl80211_dump_survey,
5069 },
5070 {
5071 .cmd = NL80211_CMD_SET_PMKSA,
5072 .doit = nl80211_setdel_pmksa,
5073 .policy = nl80211_policy,
5074 .flags = GENL_ADMIN_PERM,
5075 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5076 NL80211_FLAG_NEED_RTNL,
5077 },
5078 {
5079 .cmd = NL80211_CMD_DEL_PMKSA,
5080 .doit = nl80211_setdel_pmksa,
5081 .policy = nl80211_policy,
5082 .flags = GENL_ADMIN_PERM,
5083 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5084 NL80211_FLAG_NEED_RTNL,
5085 },
5086 {
5087 .cmd = NL80211_CMD_FLUSH_PMKSA,
5088 .doit = nl80211_flush_pmksa,
5089 .policy = nl80211_policy,
5090 .flags = GENL_ADMIN_PERM,
5091 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5092 NL80211_FLAG_NEED_RTNL,
5093 },
5094 {
5095 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5096 .doit = nl80211_remain_on_channel,
5097 .policy = nl80211_policy,
5098 .flags = GENL_ADMIN_PERM,
5099 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5100 NL80211_FLAG_NEED_RTNL,
5101 },
5102 {
5103 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5104 .doit = nl80211_cancel_remain_on_channel,
5105 .policy = nl80211_policy,
5106 .flags = GENL_ADMIN_PERM,
5107 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5108 NL80211_FLAG_NEED_RTNL,
5109 },
5110 {
5111 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5112 .doit = nl80211_set_tx_bitrate_mask,
5113 .policy = nl80211_policy,
5114 .flags = GENL_ADMIN_PERM,
5115 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5116 NL80211_FLAG_NEED_RTNL,
5117 },
5118 {
5119 .cmd = NL80211_CMD_REGISTER_FRAME,
5120 .doit = nl80211_register_mgmt,
5121 .policy = nl80211_policy,
5122 .flags = GENL_ADMIN_PERM,
5123 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5124 NL80211_FLAG_NEED_RTNL,
5125 },
5126 {
5127 .cmd = NL80211_CMD_FRAME,
5128 .doit = nl80211_tx_mgmt,
5129 .policy = nl80211_policy,
5130 .flags = GENL_ADMIN_PERM,
5131 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5132 NL80211_FLAG_NEED_RTNL,
5133 },
5134 {
5135 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
5136 .doit = nl80211_tx_mgmt_cancel_wait,
5137 .policy = nl80211_policy,
5138 .flags = GENL_ADMIN_PERM,
5139 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5140 NL80211_FLAG_NEED_RTNL,
5141 },
5142 {
5143 .cmd = NL80211_CMD_SET_POWER_SAVE,
5144 .doit = nl80211_set_power_save,
5145 .policy = nl80211_policy,
5146 .flags = GENL_ADMIN_PERM,
5147 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5148 NL80211_FLAG_NEED_RTNL,
5149 },
5150 {
5151 .cmd = NL80211_CMD_GET_POWER_SAVE,
5152 .doit = nl80211_get_power_save,
5153 .policy = nl80211_policy,
5154 /* can be retrieved by unprivileged users */
5155 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5156 NL80211_FLAG_NEED_RTNL,
5157 },
5158 {
5159 .cmd = NL80211_CMD_SET_CQM,
5160 .doit = nl80211_set_cqm,
5161 .policy = nl80211_policy,
5162 .flags = GENL_ADMIN_PERM,
5163 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5164 NL80211_FLAG_NEED_RTNL,
5165 },
5166 {
5167 .cmd = NL80211_CMD_SET_CHANNEL,
5168 .doit = nl80211_set_channel,
5169 .policy = nl80211_policy,
5170 .flags = GENL_ADMIN_PERM,
5171 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5172 NL80211_FLAG_NEED_RTNL,
5173 },
5174 {
5175 .cmd = NL80211_CMD_SET_WDS_PEER,
5176 .doit = nl80211_set_wds_peer,
5177 .policy = nl80211_policy,
5178 .flags = GENL_ADMIN_PERM,
5179 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5180 NL80211_FLAG_NEED_RTNL,
5181 },
5182 {
5183 .cmd = NL80211_CMD_JOIN_MESH,
5184 .doit = nl80211_join_mesh,
5185 .policy = nl80211_policy,
5186 .flags = GENL_ADMIN_PERM,
5187 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5188 NL80211_FLAG_NEED_RTNL,
5189 },
5190 {
5191 .cmd = NL80211_CMD_LEAVE_MESH,
5192 .doit = nl80211_leave_mesh,
5193 .policy = nl80211_policy,
5194 .flags = GENL_ADMIN_PERM,
5195 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5196 NL80211_FLAG_NEED_RTNL,
5197 },
5198 };
5199
5200 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5201 .name = "mlme",
5202 };
5203
5204 /* multicast groups */
5205 static struct genl_multicast_group nl80211_config_mcgrp = {
5206 .name = "config",
5207 };
5208 static struct genl_multicast_group nl80211_scan_mcgrp = {
5209 .name = "scan",
5210 };
5211 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5212 .name = "regulatory",
5213 };
5214
5215 /* notification functions */
5216
5217 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5218 {
5219 struct sk_buff *msg;
5220
5221 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5222 if (!msg)
5223 return;
5224
5225 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5226 nlmsg_free(msg);
5227 return;
5228 }
5229
5230 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5231 nl80211_config_mcgrp.id, GFP_KERNEL);
5232 }
5233
5234 static int nl80211_add_scan_req(struct sk_buff *msg,
5235 struct cfg80211_registered_device *rdev)
5236 {
5237 struct cfg80211_scan_request *req = rdev->scan_req;
5238 struct nlattr *nest;
5239 int i;
5240
5241 ASSERT_RDEV_LOCK(rdev);
5242
5243 if (WARN_ON(!req))
5244 return 0;
5245
5246 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5247 if (!nest)
5248 goto nla_put_failure;
5249 for (i = 0; i < req->n_ssids; i++)
5250 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5251 nla_nest_end(msg, nest);
5252
5253 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5254 if (!nest)
5255 goto nla_put_failure;
5256 for (i = 0; i < req->n_channels; i++)
5257 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5258 nla_nest_end(msg, nest);
5259
5260 if (req->ie)
5261 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5262
5263 return 0;
5264 nla_put_failure:
5265 return -ENOBUFS;
5266 }
5267
5268 static int nl80211_send_scan_msg(struct sk_buff *msg,
5269 struct cfg80211_registered_device *rdev,
5270 struct net_device *netdev,
5271 u32 pid, u32 seq, int flags,
5272 u32 cmd)
5273 {
5274 void *hdr;
5275
5276 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5277 if (!hdr)
5278 return -1;
5279
5280 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5281 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5282
5283 /* ignore errors and send incomplete event anyway */
5284 nl80211_add_scan_req(msg, rdev);
5285
5286 return genlmsg_end(msg, hdr);
5287
5288 nla_put_failure:
5289 genlmsg_cancel(msg, hdr);
5290 return -EMSGSIZE;
5291 }
5292
5293 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5294 struct net_device *netdev)
5295 {
5296 struct sk_buff *msg;
5297
5298 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5299 if (!msg)
5300 return;
5301
5302 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5303 NL80211_CMD_TRIGGER_SCAN) < 0) {
5304 nlmsg_free(msg);
5305 return;
5306 }
5307
5308 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5309 nl80211_scan_mcgrp.id, GFP_KERNEL);
5310 }
5311
5312 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5313 struct net_device *netdev)
5314 {
5315 struct sk_buff *msg;
5316
5317 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5318 if (!msg)
5319 return;
5320
5321 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5322 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5323 nlmsg_free(msg);
5324 return;
5325 }
5326
5327 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5328 nl80211_scan_mcgrp.id, GFP_KERNEL);
5329 }
5330
5331 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5332 struct net_device *netdev)
5333 {
5334 struct sk_buff *msg;
5335
5336 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5337 if (!msg)
5338 return;
5339
5340 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5341 NL80211_CMD_SCAN_ABORTED) < 0) {
5342 nlmsg_free(msg);
5343 return;
5344 }
5345
5346 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5347 nl80211_scan_mcgrp.id, GFP_KERNEL);
5348 }
5349
5350 /*
5351 * This can happen on global regulatory changes or device specific settings
5352 * based on custom world regulatory domains.
5353 */
5354 void nl80211_send_reg_change_event(struct regulatory_request *request)
5355 {
5356 struct sk_buff *msg;
5357 void *hdr;
5358
5359 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5360 if (!msg)
5361 return;
5362
5363 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5364 if (!hdr) {
5365 nlmsg_free(msg);
5366 return;
5367 }
5368
5369 /* Userspace can always count this one always being set */
5370 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5371
5372 if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5373 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5374 NL80211_REGDOM_TYPE_WORLD);
5375 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5376 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5377 NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5378 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5379 request->intersect)
5380 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5381 NL80211_REGDOM_TYPE_INTERSECTION);
5382 else {
5383 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5384 NL80211_REGDOM_TYPE_COUNTRY);
5385 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5386 }
5387
5388 if (wiphy_idx_valid(request->wiphy_idx))
5389 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5390
5391 if (genlmsg_end(msg, hdr) < 0) {
5392 nlmsg_free(msg);
5393 return;
5394 }
5395
5396 rcu_read_lock();
5397 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5398 GFP_ATOMIC);
5399 rcu_read_unlock();
5400
5401 return;
5402
5403 nla_put_failure:
5404 genlmsg_cancel(msg, hdr);
5405 nlmsg_free(msg);
5406 }
5407
5408 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5409 struct net_device *netdev,
5410 const u8 *buf, size_t len,
5411 enum nl80211_commands cmd, gfp_t gfp)
5412 {
5413 struct sk_buff *msg;
5414 void *hdr;
5415
5416 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5417 if (!msg)
5418 return;
5419
5420 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5421 if (!hdr) {
5422 nlmsg_free(msg);
5423 return;
5424 }
5425
5426 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5427 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5428 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5429
5430 if (genlmsg_end(msg, hdr) < 0) {
5431 nlmsg_free(msg);
5432 return;
5433 }
5434
5435 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5436 nl80211_mlme_mcgrp.id, gfp);
5437 return;
5438
5439 nla_put_failure:
5440 genlmsg_cancel(msg, hdr);
5441 nlmsg_free(msg);
5442 }
5443
5444 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5445 struct net_device *netdev, const u8 *buf,
5446 size_t len, gfp_t gfp)
5447 {
5448 nl80211_send_mlme_event(rdev, netdev, buf, len,
5449 NL80211_CMD_AUTHENTICATE, gfp);
5450 }
5451
5452 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5453 struct net_device *netdev, const u8 *buf,
5454 size_t len, gfp_t gfp)
5455 {
5456 nl80211_send_mlme_event(rdev, netdev, buf, len,
5457 NL80211_CMD_ASSOCIATE, gfp);
5458 }
5459
5460 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5461 struct net_device *netdev, const u8 *buf,
5462 size_t len, gfp_t gfp)
5463 {
5464 nl80211_send_mlme_event(rdev, netdev, buf, len,
5465 NL80211_CMD_DEAUTHENTICATE, gfp);
5466 }
5467
5468 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5469 struct net_device *netdev, const u8 *buf,
5470 size_t len, gfp_t gfp)
5471 {
5472 nl80211_send_mlme_event(rdev, netdev, buf, len,
5473 NL80211_CMD_DISASSOCIATE, gfp);
5474 }
5475
5476 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5477 struct net_device *netdev, int cmd,
5478 const u8 *addr, gfp_t gfp)
5479 {
5480 struct sk_buff *msg;
5481 void *hdr;
5482
5483 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5484 if (!msg)
5485 return;
5486
5487 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5488 if (!hdr) {
5489 nlmsg_free(msg);
5490 return;
5491 }
5492
5493 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5494 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5495 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5496 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5497
5498 if (genlmsg_end(msg, hdr) < 0) {
5499 nlmsg_free(msg);
5500 return;
5501 }
5502
5503 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5504 nl80211_mlme_mcgrp.id, gfp);
5505 return;
5506
5507 nla_put_failure:
5508 genlmsg_cancel(msg, hdr);
5509 nlmsg_free(msg);
5510 }
5511
5512 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5513 struct net_device *netdev, const u8 *addr,
5514 gfp_t gfp)
5515 {
5516 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5517 addr, gfp);
5518 }
5519
5520 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5521 struct net_device *netdev, const u8 *addr,
5522 gfp_t gfp)
5523 {
5524 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5525 addr, gfp);
5526 }
5527
5528 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5529 struct net_device *netdev, const u8 *bssid,
5530 const u8 *req_ie, size_t req_ie_len,
5531 const u8 *resp_ie, size_t resp_ie_len,
5532 u16 status, gfp_t gfp)
5533 {
5534 struct sk_buff *msg;
5535 void *hdr;
5536
5537 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5538 if (!msg)
5539 return;
5540
5541 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5542 if (!hdr) {
5543 nlmsg_free(msg);
5544 return;
5545 }
5546
5547 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5548 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5549 if (bssid)
5550 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5551 NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5552 if (req_ie)
5553 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5554 if (resp_ie)
5555 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5556
5557 if (genlmsg_end(msg, hdr) < 0) {
5558 nlmsg_free(msg);
5559 return;
5560 }
5561
5562 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5563 nl80211_mlme_mcgrp.id, gfp);
5564 return;
5565
5566 nla_put_failure:
5567 genlmsg_cancel(msg, hdr);
5568 nlmsg_free(msg);
5569
5570 }
5571
5572 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5573 struct net_device *netdev, const u8 *bssid,
5574 const u8 *req_ie, size_t req_ie_len,
5575 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5576 {
5577 struct sk_buff *msg;
5578 void *hdr;
5579
5580 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5581 if (!msg)
5582 return;
5583
5584 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5585 if (!hdr) {
5586 nlmsg_free(msg);
5587 return;
5588 }
5589
5590 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5591 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5592 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5593 if (req_ie)
5594 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5595 if (resp_ie)
5596 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5597
5598 if (genlmsg_end(msg, hdr) < 0) {
5599 nlmsg_free(msg);
5600 return;
5601 }
5602
5603 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5604 nl80211_mlme_mcgrp.id, gfp);
5605 return;
5606
5607 nla_put_failure:
5608 genlmsg_cancel(msg, hdr);
5609 nlmsg_free(msg);
5610
5611 }
5612
5613 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5614 struct net_device *netdev, u16 reason,
5615 const u8 *ie, size_t ie_len, bool from_ap)
5616 {
5617 struct sk_buff *msg;
5618 void *hdr;
5619
5620 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5621 if (!msg)
5622 return;
5623
5624 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5625 if (!hdr) {
5626 nlmsg_free(msg);
5627 return;
5628 }
5629
5630 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5631 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5632 if (from_ap && reason)
5633 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5634 if (from_ap)
5635 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5636 if (ie)
5637 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5638
5639 if (genlmsg_end(msg, hdr) < 0) {
5640 nlmsg_free(msg);
5641 return;
5642 }
5643
5644 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5645 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5646 return;
5647
5648 nla_put_failure:
5649 genlmsg_cancel(msg, hdr);
5650 nlmsg_free(msg);
5651
5652 }
5653
5654 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5655 struct net_device *netdev, const u8 *bssid,
5656 gfp_t gfp)
5657 {
5658 struct sk_buff *msg;
5659 void *hdr;
5660
5661 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5662 if (!msg)
5663 return;
5664
5665 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5666 if (!hdr) {
5667 nlmsg_free(msg);
5668 return;
5669 }
5670
5671 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5672 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5673 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5674
5675 if (genlmsg_end(msg, hdr) < 0) {
5676 nlmsg_free(msg);
5677 return;
5678 }
5679
5680 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5681 nl80211_mlme_mcgrp.id, gfp);
5682 return;
5683
5684 nla_put_failure:
5685 genlmsg_cancel(msg, hdr);
5686 nlmsg_free(msg);
5687 }
5688
5689 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5690 struct net_device *netdev, const u8 *addr,
5691 enum nl80211_key_type key_type, int key_id,
5692 const u8 *tsc, gfp_t gfp)
5693 {
5694 struct sk_buff *msg;
5695 void *hdr;
5696
5697 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5698 if (!msg)
5699 return;
5700
5701 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5702 if (!hdr) {
5703 nlmsg_free(msg);
5704 return;
5705 }
5706
5707 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5708 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5709 if (addr)
5710 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5711 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5712 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5713 if (tsc)
5714 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5715
5716 if (genlmsg_end(msg, hdr) < 0) {
5717 nlmsg_free(msg);
5718 return;
5719 }
5720
5721 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5722 nl80211_mlme_mcgrp.id, gfp);
5723 return;
5724
5725 nla_put_failure:
5726 genlmsg_cancel(msg, hdr);
5727 nlmsg_free(msg);
5728 }
5729
5730 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5731 struct ieee80211_channel *channel_before,
5732 struct ieee80211_channel *channel_after)
5733 {
5734 struct sk_buff *msg;
5735 void *hdr;
5736 struct nlattr *nl_freq;
5737
5738 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5739 if (!msg)
5740 return;
5741
5742 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5743 if (!hdr) {
5744 nlmsg_free(msg);
5745 return;
5746 }
5747
5748 /*
5749 * Since we are applying the beacon hint to a wiphy we know its
5750 * wiphy_idx is valid
5751 */
5752 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5753
5754 /* Before */
5755 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5756 if (!nl_freq)
5757 goto nla_put_failure;
5758 if (nl80211_msg_put_channel(msg, channel_before))
5759 goto nla_put_failure;
5760 nla_nest_end(msg, nl_freq);
5761
5762 /* After */
5763 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5764 if (!nl_freq)
5765 goto nla_put_failure;
5766 if (nl80211_msg_put_channel(msg, channel_after))
5767 goto nla_put_failure;
5768 nla_nest_end(msg, nl_freq);
5769
5770 if (genlmsg_end(msg, hdr) < 0) {
5771 nlmsg_free(msg);
5772 return;
5773 }
5774
5775 rcu_read_lock();
5776 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5777 GFP_ATOMIC);
5778 rcu_read_unlock();
5779
5780 return;
5781
5782 nla_put_failure:
5783 genlmsg_cancel(msg, hdr);
5784 nlmsg_free(msg);
5785 }
5786
5787 static void nl80211_send_remain_on_chan_event(
5788 int cmd, struct cfg80211_registered_device *rdev,
5789 struct net_device *netdev, u64 cookie,
5790 struct ieee80211_channel *chan,
5791 enum nl80211_channel_type channel_type,
5792 unsigned int duration, gfp_t gfp)
5793 {
5794 struct sk_buff *msg;
5795 void *hdr;
5796
5797 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5798 if (!msg)
5799 return;
5800
5801 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5802 if (!hdr) {
5803 nlmsg_free(msg);
5804 return;
5805 }
5806
5807 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5808 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5809 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5810 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5811 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5812
5813 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5814 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5815
5816 if (genlmsg_end(msg, hdr) < 0) {
5817 nlmsg_free(msg);
5818 return;
5819 }
5820
5821 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5822 nl80211_mlme_mcgrp.id, gfp);
5823 return;
5824
5825 nla_put_failure:
5826 genlmsg_cancel(msg, hdr);
5827 nlmsg_free(msg);
5828 }
5829
5830 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5831 struct net_device *netdev, u64 cookie,
5832 struct ieee80211_channel *chan,
5833 enum nl80211_channel_type channel_type,
5834 unsigned int duration, gfp_t gfp)
5835 {
5836 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5837 rdev, netdev, cookie, chan,
5838 channel_type, duration, gfp);
5839 }
5840
5841 void nl80211_send_remain_on_channel_cancel(
5842 struct cfg80211_registered_device *rdev, struct net_device *netdev,
5843 u64 cookie, struct ieee80211_channel *chan,
5844 enum nl80211_channel_type channel_type, gfp_t gfp)
5845 {
5846 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5847 rdev, netdev, cookie, chan,
5848 channel_type, 0, gfp);
5849 }
5850
5851 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5852 struct net_device *dev, const u8 *mac_addr,
5853 struct station_info *sinfo, gfp_t gfp)
5854 {
5855 struct sk_buff *msg;
5856
5857 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5858 if (!msg)
5859 return;
5860
5861 if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5862 nlmsg_free(msg);
5863 return;
5864 }
5865
5866 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5867 nl80211_mlme_mcgrp.id, gfp);
5868 }
5869
5870 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
5871 struct net_device *netdev, u32 nlpid,
5872 int freq, const u8 *buf, size_t len, gfp_t gfp)
5873 {
5874 struct sk_buff *msg;
5875 void *hdr;
5876 int err;
5877
5878 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5879 if (!msg)
5880 return -ENOMEM;
5881
5882 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
5883 if (!hdr) {
5884 nlmsg_free(msg);
5885 return -ENOMEM;
5886 }
5887
5888 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5889 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5890 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5891 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5892
5893 err = genlmsg_end(msg, hdr);
5894 if (err < 0) {
5895 nlmsg_free(msg);
5896 return err;
5897 }
5898
5899 err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5900 if (err < 0)
5901 return err;
5902 return 0;
5903
5904 nla_put_failure:
5905 genlmsg_cancel(msg, hdr);
5906 nlmsg_free(msg);
5907 return -ENOBUFS;
5908 }
5909
5910 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
5911 struct net_device *netdev, u64 cookie,
5912 const u8 *buf, size_t len, bool ack,
5913 gfp_t gfp)
5914 {
5915 struct sk_buff *msg;
5916 void *hdr;
5917
5918 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5919 if (!msg)
5920 return;
5921
5922 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
5923 if (!hdr) {
5924 nlmsg_free(msg);
5925 return;
5926 }
5927
5928 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5929 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5930 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5931 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5932 if (ack)
5933 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
5934
5935 if (genlmsg_end(msg, hdr) < 0) {
5936 nlmsg_free(msg);
5937 return;
5938 }
5939
5940 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
5941 return;
5942
5943 nla_put_failure:
5944 genlmsg_cancel(msg, hdr);
5945 nlmsg_free(msg);
5946 }
5947
5948 void
5949 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
5950 struct net_device *netdev,
5951 enum nl80211_cqm_rssi_threshold_event rssi_event,
5952 gfp_t gfp)
5953 {
5954 struct sk_buff *msg;
5955 struct nlattr *pinfoattr;
5956 void *hdr;
5957
5958 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5959 if (!msg)
5960 return;
5961
5962 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
5963 if (!hdr) {
5964 nlmsg_free(msg);
5965 return;
5966 }
5967
5968 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5969 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5970
5971 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
5972 if (!pinfoattr)
5973 goto nla_put_failure;
5974
5975 NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
5976 rssi_event);
5977
5978 nla_nest_end(msg, pinfoattr);
5979
5980 if (genlmsg_end(msg, hdr) < 0) {
5981 nlmsg_free(msg);
5982 return;
5983 }
5984
5985 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5986 nl80211_mlme_mcgrp.id, gfp);
5987 return;
5988
5989 nla_put_failure:
5990 genlmsg_cancel(msg, hdr);
5991 nlmsg_free(msg);
5992 }
5993
5994 void
5995 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
5996 struct net_device *netdev, const u8 *peer,
5997 u32 num_packets, gfp_t gfp)
5998 {
5999 struct sk_buff *msg;
6000 struct nlattr *pinfoattr;
6001 void *hdr;
6002
6003 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6004 if (!msg)
6005 return;
6006
6007 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6008 if (!hdr) {
6009 nlmsg_free(msg);
6010 return;
6011 }
6012
6013 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6014 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6015 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
6016
6017 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6018 if (!pinfoattr)
6019 goto nla_put_failure;
6020
6021 NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
6022
6023 nla_nest_end(msg, pinfoattr);
6024
6025 if (genlmsg_end(msg, hdr) < 0) {
6026 nlmsg_free(msg);
6027 return;
6028 }
6029
6030 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6031 nl80211_mlme_mcgrp.id, gfp);
6032 return;
6033
6034 nla_put_failure:
6035 genlmsg_cancel(msg, hdr);
6036 nlmsg_free(msg);
6037 }
6038
6039 static int nl80211_netlink_notify(struct notifier_block * nb,
6040 unsigned long state,
6041 void *_notify)
6042 {
6043 struct netlink_notify *notify = _notify;
6044 struct cfg80211_registered_device *rdev;
6045 struct wireless_dev *wdev;
6046
6047 if (state != NETLINK_URELEASE)
6048 return NOTIFY_DONE;
6049
6050 rcu_read_lock();
6051
6052 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6053 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6054 cfg80211_mlme_unregister_socket(wdev, notify->pid);
6055
6056 rcu_read_unlock();
6057
6058 return NOTIFY_DONE;
6059 }
6060
6061 static struct notifier_block nl80211_netlink_notifier = {
6062 .notifier_call = nl80211_netlink_notify,
6063 };
6064
6065 /* initialisation/exit functions */
6066
6067 int nl80211_init(void)
6068 {
6069 int err;
6070
6071 err = genl_register_family_with_ops(&nl80211_fam,
6072 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6073 if (err)
6074 return err;
6075
6076 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6077 if (err)
6078 goto err_out;
6079
6080 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6081 if (err)
6082 goto err_out;
6083
6084 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6085 if (err)
6086 goto err_out;
6087
6088 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6089 if (err)
6090 goto err_out;
6091
6092 #ifdef CONFIG_NL80211_TESTMODE
6093 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6094 if (err)
6095 goto err_out;
6096 #endif
6097
6098 err = netlink_register_notifier(&nl80211_netlink_notifier);
6099 if (err)
6100 goto err_out;
6101
6102 return 0;
6103 err_out:
6104 genl_unregister_family(&nl80211_fam);
6105 return err;
6106 }
6107
6108 void nl80211_exit(void)
6109 {
6110 netlink_unregister_notifier(&nl80211_netlink_notifier);
6111 genl_unregister_family(&nl80211_fam);
6112 }
Linux kernel - Deliverables
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