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nl80211: fix error in generic netif_running check
[linux-2.6.git] / net / wireless / nl80211.c
blob9942f0b061ff78555d2cd0f0e57705e67637f233
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
125 [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
126
127 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
128 .len = NL80211_HT_CAPABILITY_LEN },
129
130 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
131 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
132 .len = IEEE80211_MAX_DATA_LEN },
133 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
134 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
135
136 [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
137 .len = IEEE80211_MAX_SSID_LEN },
138 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
139 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
140 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
141 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
142 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
143 [NL80211_ATTR_STA_FLAGS2] = {
144 .len = sizeof(struct nl80211_sta_flag_update),
145 },
146 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
147 [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
148 [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
149 [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
150 [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
151 [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
152 [NL80211_ATTR_PID] = { .type = NLA_U32 },
153 [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
154 [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
155 .len = WLAN_PMKID_LEN },
156 [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
157 [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
158 [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
159 [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
160 .len = IEEE80211_MAX_DATA_LEN },
161 [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
162 [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
163 [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
164 [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
165 [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
166
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 };
171
172 /* policy for the key attributes */
173 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
174 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
175 [NL80211_KEY_IDX] = { .type = NLA_U8 },
176 [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
177 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
178 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
179 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
180 [NL80211_KEY_TYPE] = { .type = NLA_U32 },
181 };
182
183 /* ifidx get helper */
184 static int nl80211_get_ifidx(struct netlink_callback *cb)
185 {
186 int res;
187
188 res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
189 nl80211_fam.attrbuf, nl80211_fam.maxattr,
190 nl80211_policy);
191 if (res)
192 return res;
193
194 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
195 return -EINVAL;
196
197 res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
198 if (!res)
199 return -EINVAL;
200 return res;
201 }
202
203 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
204 struct netlink_callback *cb,
205 struct cfg80211_registered_device **rdev,
206 struct net_device **dev)
207 {
208 int ifidx = cb->args[0];
209 int err;
210
211 if (!ifidx)
212 ifidx = nl80211_get_ifidx(cb);
213 if (ifidx < 0)
214 return ifidx;
215
216 cb->args[0] = ifidx;
217
218 rtnl_lock();
219
220 *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
221 if (!*dev) {
222 err = -ENODEV;
223 goto out_rtnl;
224 }
225
226 *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
227 if (IS_ERR(dev)) {
228 err = PTR_ERR(dev);
229 goto out_rtnl;
230 }
231
232 return 0;
233 out_rtnl:
234 rtnl_unlock();
235 return err;
236 }
237
238 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
239 {
240 cfg80211_unlock_rdev(rdev);
241 rtnl_unlock();
242 }
243
244 /* IE validation */
245 static bool is_valid_ie_attr(const struct nlattr *attr)
246 {
247 const u8 *pos;
248 int len;
249
250 if (!attr)
251 return true;
252
253 pos = nla_data(attr);
254 len = nla_len(attr);
255
256 while (len) {
257 u8 elemlen;
258
259 if (len < 2)
260 return false;
261 len -= 2;
262
263 elemlen = pos[1];
264 if (elemlen > len)
265 return false;
266
267 len -= elemlen;
268 pos += 2 + elemlen;
269 }
270
271 return true;
272 }
273
274 /* message building helper */
275 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
276 int flags, u8 cmd)
277 {
278 /* since there is no private header just add the generic one */
279 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
280 }
281
282 static int nl80211_msg_put_channel(struct sk_buff *msg,
283 struct ieee80211_channel *chan)
284 {
285 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
286 chan->center_freq);
287
288 if (chan->flags & IEEE80211_CHAN_DISABLED)
289 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
290 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
291 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
292 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
293 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
294 if (chan->flags & IEEE80211_CHAN_RADAR)
295 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
296
297 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
298 DBM_TO_MBM(chan->max_power));
299
300 return 0;
301
302 nla_put_failure:
303 return -ENOBUFS;
304 }
305
306 /* netlink command implementations */
307
308 struct key_parse {
309 struct key_params p;
310 int idx;
311 int type;
312 bool def, defmgmt;
313 };
314
315 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
316 {
317 struct nlattr *tb[NL80211_KEY_MAX + 1];
318 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
319 nl80211_key_policy);
320 if (err)
321 return err;
322
323 k->def = !!tb[NL80211_KEY_DEFAULT];
324 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
325
326 if (tb[NL80211_KEY_IDX])
327 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
328
329 if (tb[NL80211_KEY_DATA]) {
330 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
331 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
332 }
333
334 if (tb[NL80211_KEY_SEQ]) {
335 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
336 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
337 }
338
339 if (tb[NL80211_KEY_CIPHER])
340 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
341
342 if (tb[NL80211_KEY_TYPE]) {
343 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
344 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
345 return -EINVAL;
346 }
347
348 return 0;
349 }
350
351 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
352 {
353 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
354 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
355 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
356 }
357
358 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
359 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
360 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
361 }
362
363 if (info->attrs[NL80211_ATTR_KEY_IDX])
364 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
365
366 if (info->attrs[NL80211_ATTR_KEY_CIPHER])
367 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
368
369 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
370 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
371
372 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
373 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
374 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
375 return -EINVAL;
376 }
377
378 return 0;
379 }
380
381 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
382 {
383 int err;
384
385 memset(k, 0, sizeof(*k));
386 k->idx = -1;
387 k->type = -1;
388
389 if (info->attrs[NL80211_ATTR_KEY])
390 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
391 else
392 err = nl80211_parse_key_old(info, k);
393
394 if (err)
395 return err;
396
397 if (k->def && k->defmgmt)
398 return -EINVAL;
399
400 if (k->idx != -1) {
401 if (k->defmgmt) {
402 if (k->idx < 4 || k->idx > 5)
403 return -EINVAL;
404 } else if (k->def) {
405 if (k->idx < 0 || k->idx > 3)
406 return -EINVAL;
407 } else {
408 if (k->idx < 0 || k->idx > 5)
409 return -EINVAL;
410 }
411 }
412
413 return 0;
414 }
415
416 static struct cfg80211_cached_keys *
417 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
418 struct nlattr *keys)
419 {
420 struct key_parse parse;
421 struct nlattr *key;
422 struct cfg80211_cached_keys *result;
423 int rem, err, def = 0;
424
425 result = kzalloc(sizeof(*result), GFP_KERNEL);
426 if (!result)
427 return ERR_PTR(-ENOMEM);
428
429 result->def = -1;
430 result->defmgmt = -1;
431
432 nla_for_each_nested(key, keys, rem) {
433 memset(&parse, 0, sizeof(parse));
434 parse.idx = -1;
435
436 err = nl80211_parse_key_new(key, &parse);
437 if (err)
438 goto error;
439 err = -EINVAL;
440 if (!parse.p.key)
441 goto error;
442 if (parse.idx < 0 || parse.idx > 4)
443 goto error;
444 if (parse.def) {
445 if (def)
446 goto error;
447 def = 1;
448 result->def = parse.idx;
449 } else if (parse.defmgmt)
450 goto error;
451 err = cfg80211_validate_key_settings(rdev, &parse.p,
452 parse.idx, false, NULL);
453 if (err)
454 goto error;
455 result->params[parse.idx].cipher = parse.p.cipher;
456 result->params[parse.idx].key_len = parse.p.key_len;
457 result->params[parse.idx].key = result->data[parse.idx];
458 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
459 }
460
461 return result;
462 error:
463 kfree(result);
464 return ERR_PTR(err);
465 }
466
467 static int nl80211_key_allowed(struct wireless_dev *wdev)
468 {
469 ASSERT_WDEV_LOCK(wdev);
470
471 switch (wdev->iftype) {
472 case NL80211_IFTYPE_AP:
473 case NL80211_IFTYPE_AP_VLAN:
474 case NL80211_IFTYPE_P2P_GO:
475 break;
476 case NL80211_IFTYPE_ADHOC:
477 if (!wdev->current_bss)
478 return -ENOLINK;
479 break;
480 case NL80211_IFTYPE_STATION:
481 case NL80211_IFTYPE_P2P_CLIENT:
482 if (wdev->sme_state != CFG80211_SME_CONNECTED)
483 return -ENOLINK;
484 break;
485 default:
486 return -EINVAL;
487 }
488
489 return 0;
490 }
491
492 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
493 struct cfg80211_registered_device *dev)
494 {
495 void *hdr;
496 struct nlattr *nl_bands, *nl_band;
497 struct nlattr *nl_freqs, *nl_freq;
498 struct nlattr *nl_rates, *nl_rate;
499 struct nlattr *nl_modes;
500 struct nlattr *nl_cmds;
501 enum ieee80211_band band;
502 struct ieee80211_channel *chan;
503 struct ieee80211_rate *rate;
504 int i;
505 u16 ifmodes = dev->wiphy.interface_modes;
506 const struct ieee80211_txrx_stypes *mgmt_stypes =
507 dev->wiphy.mgmt_stypes;
508
509 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
510 if (!hdr)
511 return -1;
512
513 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
514 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
515
516 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
517 cfg80211_rdev_list_generation);
518
519 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
520 dev->wiphy.retry_short);
521 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
522 dev->wiphy.retry_long);
523 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
524 dev->wiphy.frag_threshold);
525 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
526 dev->wiphy.rts_threshold);
527 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
528 dev->wiphy.coverage_class);
529
530 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
531 dev->wiphy.max_scan_ssids);
532 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
533 dev->wiphy.max_scan_ie_len);
534
535 if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
536 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
537
538 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
539 sizeof(u32) * dev->wiphy.n_cipher_suites,
540 dev->wiphy.cipher_suites);
541
542 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
543 dev->wiphy.max_num_pmkids);
544
545 if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
546 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
547
548 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
549 if (!nl_modes)
550 goto nla_put_failure;
551
552 i = 0;
553 while (ifmodes) {
554 if (ifmodes & 1)
555 NLA_PUT_FLAG(msg, i);
556 ifmodes >>= 1;
557 i++;
558 }
559
560 nla_nest_end(msg, nl_modes);
561
562 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
563 if (!nl_bands)
564 goto nla_put_failure;
565
566 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
567 if (!dev->wiphy.bands[band])
568 continue;
569
570 nl_band = nla_nest_start(msg, band);
571 if (!nl_band)
572 goto nla_put_failure;
573
574 /* add HT info */
575 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
576 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
577 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
578 &dev->wiphy.bands[band]->ht_cap.mcs);
579 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
580 dev->wiphy.bands[band]->ht_cap.cap);
581 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
582 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
583 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
584 dev->wiphy.bands[band]->ht_cap.ampdu_density);
585 }
586
587 /* add frequencies */
588 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
589 if (!nl_freqs)
590 goto nla_put_failure;
591
592 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
593 nl_freq = nla_nest_start(msg, i);
594 if (!nl_freq)
595 goto nla_put_failure;
596
597 chan = &dev->wiphy.bands[band]->channels[i];
598
599 if (nl80211_msg_put_channel(msg, chan))
600 goto nla_put_failure;
601
602 nla_nest_end(msg, nl_freq);
603 }
604
605 nla_nest_end(msg, nl_freqs);
606
607 /* add bitrates */
608 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
609 if (!nl_rates)
610 goto nla_put_failure;
611
612 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
613 nl_rate = nla_nest_start(msg, i);
614 if (!nl_rate)
615 goto nla_put_failure;
616
617 rate = &dev->wiphy.bands[band]->bitrates[i];
618 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
619 rate->bitrate);
620 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
621 NLA_PUT_FLAG(msg,
622 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
623
624 nla_nest_end(msg, nl_rate);
625 }
626
627 nla_nest_end(msg, nl_rates);
628
629 nla_nest_end(msg, nl_band);
630 }
631 nla_nest_end(msg, nl_bands);
632
633 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
634 if (!nl_cmds)
635 goto nla_put_failure;
636
637 i = 0;
638 #define CMD(op, n) \
639 do { \
640 if (dev->ops->op) { \
641 i++; \
642 NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
643 } \
644 } while (0)
645
646 CMD(add_virtual_intf, NEW_INTERFACE);
647 CMD(change_virtual_intf, SET_INTERFACE);
648 CMD(add_key, NEW_KEY);
649 CMD(add_beacon, NEW_BEACON);
650 CMD(add_station, NEW_STATION);
651 CMD(add_mpath, NEW_MPATH);
652 CMD(set_mesh_params, SET_MESH_PARAMS);
653 CMD(change_bss, SET_BSS);
654 CMD(auth, AUTHENTICATE);
655 CMD(assoc, ASSOCIATE);
656 CMD(deauth, DEAUTHENTICATE);
657 CMD(disassoc, DISASSOCIATE);
658 CMD(join_ibss, JOIN_IBSS);
659 CMD(set_pmksa, SET_PMKSA);
660 CMD(del_pmksa, DEL_PMKSA);
661 CMD(flush_pmksa, FLUSH_PMKSA);
662 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
663 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
664 CMD(mgmt_tx, FRAME);
665 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
666 i++;
667 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
668 }
669 CMD(set_channel, SET_CHANNEL);
670 CMD(set_wds_peer, SET_WDS_PEER);
671
672 #undef CMD
673
674 if (dev->ops->connect || dev->ops->auth) {
675 i++;
676 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
677 }
678
679 if (dev->ops->disconnect || dev->ops->deauth) {
680 i++;
681 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
682 }
683
684 nla_nest_end(msg, nl_cmds);
685
686 if (mgmt_stypes) {
687 u16 stypes;
688 struct nlattr *nl_ftypes, *nl_ifs;
689 enum nl80211_iftype ift;
690
691 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
692 if (!nl_ifs)
693 goto nla_put_failure;
694
695 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
696 nl_ftypes = nla_nest_start(msg, ift);
697 if (!nl_ftypes)
698 goto nla_put_failure;
699 i = 0;
700 stypes = mgmt_stypes[ift].tx;
701 while (stypes) {
702 if (stypes & 1)
703 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
704 (i << 4) | IEEE80211_FTYPE_MGMT);
705 stypes >>= 1;
706 i++;
707 }
708 nla_nest_end(msg, nl_ftypes);
709 }
710
711 nla_nest_end(msg, nl_ifs);
712
713 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
714 if (!nl_ifs)
715 goto nla_put_failure;
716
717 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
718 nl_ftypes = nla_nest_start(msg, ift);
719 if (!nl_ftypes)
720 goto nla_put_failure;
721 i = 0;
722 stypes = mgmt_stypes[ift].rx;
723 while (stypes) {
724 if (stypes & 1)
725 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
726 (i << 4) | IEEE80211_FTYPE_MGMT);
727 stypes >>= 1;
728 i++;
729 }
730 nla_nest_end(msg, nl_ftypes);
731 }
732 nla_nest_end(msg, nl_ifs);
733 }
734
735 return genlmsg_end(msg, hdr);
736
737 nla_put_failure:
738 genlmsg_cancel(msg, hdr);
739 return -EMSGSIZE;
740 }
741
742 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
743 {
744 int idx = 0;
745 int start = cb->args[0];
746 struct cfg80211_registered_device *dev;
747
748 mutex_lock(&cfg80211_mutex);
749 list_for_each_entry(dev, &cfg80211_rdev_list, list) {
750 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
751 continue;
752 if (++idx <= start)
753 continue;
754 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
755 cb->nlh->nlmsg_seq, NLM_F_MULTI,
756 dev) < 0) {
757 idx--;
758 break;
759 }
760 }
761 mutex_unlock(&cfg80211_mutex);
762
763 cb->args[0] = idx;
764
765 return skb->len;
766 }
767
768 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
769 {
770 struct sk_buff *msg;
771 struct cfg80211_registered_device *dev = info->user_ptr[0];
772
773 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
774 if (!msg)
775 return -ENOMEM;
776
777 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
778 nlmsg_free(msg);
779 return -ENOBUFS;
780 }
781
782 return genlmsg_reply(msg, info);
783 }
784
785 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
786 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
787 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
788 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
789 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
790 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
791 };
792
793 static int parse_txq_params(struct nlattr *tb[],
794 struct ieee80211_txq_params *txq_params)
795 {
796 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
797 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
798 !tb[NL80211_TXQ_ATTR_AIFS])
799 return -EINVAL;
800
801 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
802 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
803 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
804 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
805 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
806
807 return 0;
808 }
809
810 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
811 {
812 /*
813 * You can only set the channel explicitly for AP, mesh
814 * and WDS type interfaces; all others have their channel
815 * managed via their respective "establish a connection"
816 * command (connect, join, ...)
817 *
818 * Monitors are special as they are normally slaved to
819 * whatever else is going on, so they behave as though
820 * you tried setting the wiphy channel itself.
821 */
822 return !wdev ||
823 wdev->iftype == NL80211_IFTYPE_AP ||
824 wdev->iftype == NL80211_IFTYPE_WDS ||
825 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
826 wdev->iftype == NL80211_IFTYPE_MONITOR ||
827 wdev->iftype == NL80211_IFTYPE_P2P_GO;
828 }
829
830 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
831 struct wireless_dev *wdev,
832 struct genl_info *info)
833 {
834 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
835 u32 freq;
836 int result;
837
838 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
839 return -EINVAL;
840
841 if (!nl80211_can_set_dev_channel(wdev))
842 return -EOPNOTSUPP;
843
844 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
845 channel_type = nla_get_u32(info->attrs[
846 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
847 if (channel_type != NL80211_CHAN_NO_HT &&
848 channel_type != NL80211_CHAN_HT20 &&
849 channel_type != NL80211_CHAN_HT40PLUS &&
850 channel_type != NL80211_CHAN_HT40MINUS)
851 return -EINVAL;
852 }
853
854 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
855
856 mutex_lock(&rdev->devlist_mtx);
857 if (wdev) {
858 wdev_lock(wdev);
859 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
860 wdev_unlock(wdev);
861 } else {
862 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
863 }
864 mutex_unlock(&rdev->devlist_mtx);
865
866 return result;
867 }
868
869 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
870 {
871 struct cfg80211_registered_device *rdev = info->user_ptr[0];
872 struct net_device *netdev = info->user_ptr[1];
873
874 return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
875 }
876
877 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
878 {
879 struct cfg80211_registered_device *rdev;
880 struct wireless_dev *wdev;
881 struct net_device *dev;
882 u8 *bssid;
883 int err;
884
885 if (!info->attrs[NL80211_ATTR_MAC])
886 return -EINVAL;
887
888 rtnl_lock();
889
890 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
891 if (err)
892 goto unlock_rtnl;
893
894 wdev = dev->ieee80211_ptr;
895
896 if (netif_running(dev)) {
897 err = -EBUSY;
898 goto out;
899 }
900
901 if (!rdev->ops->set_wds_peer) {
902 err = -EOPNOTSUPP;
903 goto out;
904 }
905
906 if (wdev->iftype != NL80211_IFTYPE_WDS) {
907 err = -EOPNOTSUPP;
908 goto out;
909 }
910
911 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
912 err = rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
913
914 out:
915 cfg80211_unlock_rdev(rdev);
916 dev_put(dev);
917 unlock_rtnl:
918 rtnl_unlock();
919
920 return err;
921 }
922
923
924 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
925 {
926 struct cfg80211_registered_device *rdev;
927 struct net_device *netdev = NULL;
928 struct wireless_dev *wdev;
929 int result = 0, rem_txq_params = 0;
930 struct nlattr *nl_txq_params;
931 u32 changed;
932 u8 retry_short = 0, retry_long = 0;
933 u32 frag_threshold = 0, rts_threshold = 0;
934 u8 coverage_class = 0;
935
936 /*
937 * Try to find the wiphy and netdev. Normally this
938 * function shouldn't need the netdev, but this is
939 * done for backward compatibility -- previously
940 * setting the channel was done per wiphy, but now
941 * it is per netdev. Previous userland like hostapd
942 * also passed a netdev to set_wiphy, so that it is
943 * possible to let that go to the right netdev!
944 */
945 mutex_lock(&cfg80211_mutex);
946
947 if (info->attrs[NL80211_ATTR_IFINDEX]) {
948 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
949
950 netdev = dev_get_by_index(genl_info_net(info), ifindex);
951 if (netdev && netdev->ieee80211_ptr) {
952 rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
953 mutex_lock(&rdev->mtx);
954 } else
955 netdev = NULL;
956 }
957
958 if (!netdev) {
959 rdev = __cfg80211_rdev_from_info(info);
960 if (IS_ERR(rdev)) {
961 mutex_unlock(&cfg80211_mutex);
962 return PTR_ERR(rdev);
963 }
964 wdev = NULL;
965 netdev = NULL;
966 result = 0;
967
968 mutex_lock(&rdev->mtx);
969 } else if (netif_running(netdev) &&
970 nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
971 wdev = netdev->ieee80211_ptr;
972 else
973 wdev = NULL;
974
975 /*
976 * end workaround code, by now the rdev is available
977 * and locked, and wdev may or may not be NULL.
978 */
979
980 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
981 result = cfg80211_dev_rename(
982 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
983
984 mutex_unlock(&cfg80211_mutex);
985
986 if (result)
987 goto bad_res;
988
989 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
990 struct ieee80211_txq_params txq_params;
991 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
992
993 if (!rdev->ops->set_txq_params) {
994 result = -EOPNOTSUPP;
995 goto bad_res;
996 }
997
998 nla_for_each_nested(nl_txq_params,
999 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1000 rem_txq_params) {
1001 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1002 nla_data(nl_txq_params),
1003 nla_len(nl_txq_params),
1004 txq_params_policy);
1005 result = parse_txq_params(tb, &txq_params);
1006 if (result)
1007 goto bad_res;
1008
1009 result = rdev->ops->set_txq_params(&rdev->wiphy,
1010 &txq_params);
1011 if (result)
1012 goto bad_res;
1013 }
1014 }
1015
1016 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1017 result = __nl80211_set_channel(rdev, wdev, info);
1018 if (result)
1019 goto bad_res;
1020 }
1021
1022 if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1023 enum nl80211_tx_power_setting type;
1024 int idx, mbm = 0;
1025
1026 if (!rdev->ops->set_tx_power) {
1027 result = -EOPNOTSUPP;
1028 goto bad_res;
1029 }
1030
1031 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1032 type = nla_get_u32(info->attrs[idx]);
1033
1034 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1035 (type != NL80211_TX_POWER_AUTOMATIC)) {
1036 result = -EINVAL;
1037 goto bad_res;
1038 }
1039
1040 if (type != NL80211_TX_POWER_AUTOMATIC) {
1041 idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1042 mbm = nla_get_u32(info->attrs[idx]);
1043 }
1044
1045 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1046 if (result)
1047 goto bad_res;
1048 }
1049
1050 changed = 0;
1051
1052 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1053 retry_short = nla_get_u8(
1054 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1055 if (retry_short == 0) {
1056 result = -EINVAL;
1057 goto bad_res;
1058 }
1059 changed |= WIPHY_PARAM_RETRY_SHORT;
1060 }
1061
1062 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1063 retry_long = nla_get_u8(
1064 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1065 if (retry_long == 0) {
1066 result = -EINVAL;
1067 goto bad_res;
1068 }
1069 changed |= WIPHY_PARAM_RETRY_LONG;
1070 }
1071
1072 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1073 frag_threshold = nla_get_u32(
1074 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1075 if (frag_threshold < 256) {
1076 result = -EINVAL;
1077 goto bad_res;
1078 }
1079 if (frag_threshold != (u32) -1) {
1080 /*
1081 * Fragments (apart from the last one) are required to
1082 * have even length. Make the fragmentation code
1083 * simpler by stripping LSB should someone try to use
1084 * odd threshold value.
1085 */
1086 frag_threshold &= ~0x1;
1087 }
1088 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1089 }
1090
1091 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1092 rts_threshold = nla_get_u32(
1093 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1094 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1095 }
1096
1097 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1098 coverage_class = nla_get_u8(
1099 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1100 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1101 }
1102
1103 if (changed) {
1104 u8 old_retry_short, old_retry_long;
1105 u32 old_frag_threshold, old_rts_threshold;
1106 u8 old_coverage_class;
1107
1108 if (!rdev->ops->set_wiphy_params) {
1109 result = -EOPNOTSUPP;
1110 goto bad_res;
1111 }
1112
1113 old_retry_short = rdev->wiphy.retry_short;
1114 old_retry_long = rdev->wiphy.retry_long;
1115 old_frag_threshold = rdev->wiphy.frag_threshold;
1116 old_rts_threshold = rdev->wiphy.rts_threshold;
1117 old_coverage_class = rdev->wiphy.coverage_class;
1118
1119 if (changed & WIPHY_PARAM_RETRY_SHORT)
1120 rdev->wiphy.retry_short = retry_short;
1121 if (changed & WIPHY_PARAM_RETRY_LONG)
1122 rdev->wiphy.retry_long = retry_long;
1123 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1124 rdev->wiphy.frag_threshold = frag_threshold;
1125 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1126 rdev->wiphy.rts_threshold = rts_threshold;
1127 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1128 rdev->wiphy.coverage_class = coverage_class;
1129
1130 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1131 if (result) {
1132 rdev->wiphy.retry_short = old_retry_short;
1133 rdev->wiphy.retry_long = old_retry_long;
1134 rdev->wiphy.frag_threshold = old_frag_threshold;
1135 rdev->wiphy.rts_threshold = old_rts_threshold;
1136 rdev->wiphy.coverage_class = old_coverage_class;
1137 }
1138 }
1139
1140 bad_res:
1141 mutex_unlock(&rdev->mtx);
1142 if (netdev)
1143 dev_put(netdev);
1144 return result;
1145 }
1146
1147
1148 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1149 struct cfg80211_registered_device *rdev,
1150 struct net_device *dev)
1151 {
1152 void *hdr;
1153
1154 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1155 if (!hdr)
1156 return -1;
1157
1158 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1159 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1160 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1161 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1162
1163 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1164 rdev->devlist_generation ^
1165 (cfg80211_rdev_list_generation << 2));
1166
1167 return genlmsg_end(msg, hdr);
1168
1169 nla_put_failure:
1170 genlmsg_cancel(msg, hdr);
1171 return -EMSGSIZE;
1172 }
1173
1174 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1175 {
1176 int wp_idx = 0;
1177 int if_idx = 0;
1178 int wp_start = cb->args[0];
1179 int if_start = cb->args[1];
1180 struct cfg80211_registered_device *rdev;
1181 struct wireless_dev *wdev;
1182
1183 mutex_lock(&cfg80211_mutex);
1184 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1185 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1186 continue;
1187 if (wp_idx < wp_start) {
1188 wp_idx++;
1189 continue;
1190 }
1191 if_idx = 0;
1192
1193 mutex_lock(&rdev->devlist_mtx);
1194 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1195 if (if_idx < if_start) {
1196 if_idx++;
1197 continue;
1198 }
1199 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1200 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1201 rdev, wdev->netdev) < 0) {
1202 mutex_unlock(&rdev->devlist_mtx);
1203 goto out;
1204 }
1205 if_idx++;
1206 }
1207 mutex_unlock(&rdev->devlist_mtx);
1208
1209 wp_idx++;
1210 }
1211 out:
1212 mutex_unlock(&cfg80211_mutex);
1213
1214 cb->args[0] = wp_idx;
1215 cb->args[1] = if_idx;
1216
1217 return skb->len;
1218 }
1219
1220 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1221 {
1222 struct sk_buff *msg;
1223 struct cfg80211_registered_device *dev = info->user_ptr[0];
1224 struct net_device *netdev = info->user_ptr[1];
1225
1226 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1227 if (!msg)
1228 return -ENOMEM;
1229
1230 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1231 dev, netdev) < 0) {
1232 nlmsg_free(msg);
1233 return -ENOBUFS;
1234 }
1235
1236 return genlmsg_reply(msg, info);
1237 }
1238
1239 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1240 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1241 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1242 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1243 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1244 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1245 };
1246
1247 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1248 {
1249 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1250 int flag;
1251
1252 *mntrflags = 0;
1253
1254 if (!nla)
1255 return -EINVAL;
1256
1257 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1258 nla, mntr_flags_policy))
1259 return -EINVAL;
1260
1261 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1262 if (flags[flag])
1263 *mntrflags |= (1<<flag);
1264
1265 return 0;
1266 }
1267
1268 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1269 struct net_device *netdev, u8 use_4addr,
1270 enum nl80211_iftype iftype)
1271 {
1272 if (!use_4addr) {
1273 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1274 return -EBUSY;
1275 return 0;
1276 }
1277
1278 switch (iftype) {
1279 case NL80211_IFTYPE_AP_VLAN:
1280 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1281 return 0;
1282 break;
1283 case NL80211_IFTYPE_STATION:
1284 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1285 return 0;
1286 break;
1287 default:
1288 break;
1289 }
1290
1291 return -EOPNOTSUPP;
1292 }
1293
1294 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1295 {
1296 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1297 struct vif_params params;
1298 int err;
1299 enum nl80211_iftype otype, ntype;
1300 struct net_device *dev = info->user_ptr[1];
1301 u32 _flags, *flags = NULL;
1302 bool change = false;
1303
1304 memset(&params, 0, sizeof(params));
1305
1306 otype = ntype = dev->ieee80211_ptr->iftype;
1307
1308 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1309 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1310 if (otype != ntype)
1311 change = true;
1312 if (ntype > NL80211_IFTYPE_MAX)
1313 return -EINVAL;
1314 }
1315
1316 if (info->attrs[NL80211_ATTR_MESH_ID]) {
1317 if (ntype != NL80211_IFTYPE_MESH_POINT)
1318 return -EINVAL;
1319 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1320 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1321 change = true;
1322 }
1323
1324 if (info->attrs[NL80211_ATTR_4ADDR]) {
1325 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1326 change = true;
1327 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1328 if (err)
1329 return err;
1330 } else {
1331 params.use_4addr = -1;
1332 }
1333
1334 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1335 if (ntype != NL80211_IFTYPE_MONITOR)
1336 return -EINVAL;
1337 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1338 &_flags);
1339 if (err)
1340 return err;
1341
1342 flags = &_flags;
1343 change = true;
1344 }
1345
1346 if (change)
1347 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1348 else
1349 err = 0;
1350
1351 if (!err && params.use_4addr != -1)
1352 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1353
1354 return err;
1355 }
1356
1357 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1358 {
1359 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1360 struct vif_params params;
1361 int err;
1362 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1363 u32 flags;
1364
1365 memset(&params, 0, sizeof(params));
1366
1367 if (!info->attrs[NL80211_ATTR_IFNAME])
1368 return -EINVAL;
1369
1370 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1371 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1372 if (type > NL80211_IFTYPE_MAX)
1373 return -EINVAL;
1374 }
1375
1376 if (!rdev->ops->add_virtual_intf ||
1377 !(rdev->wiphy.interface_modes & (1 << type)))
1378 return -EOPNOTSUPP;
1379
1380 if (type == NL80211_IFTYPE_MESH_POINT &&
1381 info->attrs[NL80211_ATTR_MESH_ID]) {
1382 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1383 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1384 }
1385
1386 if (info->attrs[NL80211_ATTR_4ADDR]) {
1387 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1388 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1389 if (err)
1390 return err;
1391 }
1392
1393 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1394 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1395 &flags);
1396 err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1397 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1398 type, err ? NULL : &flags, &params);
1399
1400 return err;
1401 }
1402
1403 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1404 {
1405 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1406 struct net_device *dev = info->user_ptr[1];
1407
1408 if (!rdev->ops->del_virtual_intf)
1409 return -EOPNOTSUPP;
1410
1411 return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1412 }
1413
1414 struct get_key_cookie {
1415 struct sk_buff *msg;
1416 int error;
1417 int idx;
1418 };
1419
1420 static void get_key_callback(void *c, struct key_params *params)
1421 {
1422 struct nlattr *key;
1423 struct get_key_cookie *cookie = c;
1424
1425 if (params->key)
1426 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1427 params->key_len, params->key);
1428
1429 if (params->seq)
1430 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1431 params->seq_len, params->seq);
1432
1433 if (params->cipher)
1434 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1435 params->cipher);
1436
1437 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1438 if (!key)
1439 goto nla_put_failure;
1440
1441 if (params->key)
1442 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1443 params->key_len, params->key);
1444
1445 if (params->seq)
1446 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1447 params->seq_len, params->seq);
1448
1449 if (params->cipher)
1450 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1451 params->cipher);
1452
1453 NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1454
1455 nla_nest_end(cookie->msg, key);
1456
1457 return;
1458 nla_put_failure:
1459 cookie->error = 1;
1460 }
1461
1462 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1463 {
1464 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1465 int err;
1466 struct net_device *dev = info->user_ptr[1];
1467 u8 key_idx = 0;
1468 const u8 *mac_addr = NULL;
1469 bool pairwise;
1470 struct get_key_cookie cookie = {
1471 .error = 0,
1472 };
1473 void *hdr;
1474 struct sk_buff *msg;
1475
1476 if (info->attrs[NL80211_ATTR_KEY_IDX])
1477 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1478
1479 if (key_idx > 5)
1480 return -EINVAL;
1481
1482 if (info->attrs[NL80211_ATTR_MAC])
1483 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1484
1485 pairwise = !!mac_addr;
1486 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1487 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1488 if (kt >= NUM_NL80211_KEYTYPES)
1489 return -EINVAL;
1490 if (kt != NL80211_KEYTYPE_GROUP &&
1491 kt != NL80211_KEYTYPE_PAIRWISE)
1492 return -EINVAL;
1493 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1494 }
1495
1496 if (!rdev->ops->get_key)
1497 return -EOPNOTSUPP;
1498
1499 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1500 if (!msg)
1501 return -ENOMEM;
1502
1503 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1504 NL80211_CMD_NEW_KEY);
1505 if (IS_ERR(hdr))
1506 return PTR_ERR(hdr);
1507
1508 cookie.msg = msg;
1509 cookie.idx = key_idx;
1510
1511 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1512 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1513 if (mac_addr)
1514 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1515
1516 if (pairwise && mac_addr &&
1517 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1518 return -ENOENT;
1519
1520 err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1521 mac_addr, &cookie, get_key_callback);
1522
1523 if (err)
1524 goto free_msg;
1525
1526 if (cookie.error)
1527 goto nla_put_failure;
1528
1529 genlmsg_end(msg, hdr);
1530 return genlmsg_reply(msg, info);
1531
1532 nla_put_failure:
1533 err = -ENOBUFS;
1534 free_msg:
1535 nlmsg_free(msg);
1536 return err;
1537 }
1538
1539 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1540 {
1541 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1542 struct key_parse key;
1543 int err;
1544 struct net_device *dev = info->user_ptr[1];
1545 int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1546 u8 key_index);
1547
1548 err = nl80211_parse_key(info, &key);
1549 if (err)
1550 return err;
1551
1552 if (key.idx < 0)
1553 return -EINVAL;
1554
1555 /* only support setting default key */
1556 if (!key.def && !key.defmgmt)
1557 return -EINVAL;
1558
1559 if (key.def)
1560 func = rdev->ops->set_default_key;
1561 else
1562 func = rdev->ops->set_default_mgmt_key;
1563
1564 if (!func)
1565 return -EOPNOTSUPP;
1566
1567 wdev_lock(dev->ieee80211_ptr);
1568 err = nl80211_key_allowed(dev->ieee80211_ptr);
1569 if (!err)
1570 err = func(&rdev->wiphy, dev, key.idx);
1571
1572 #ifdef CONFIG_CFG80211_WEXT
1573 if (!err) {
1574 if (func == rdev->ops->set_default_key)
1575 dev->ieee80211_ptr->wext.default_key = key.idx;
1576 else
1577 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1578 }
1579 #endif
1580 wdev_unlock(dev->ieee80211_ptr);
1581
1582 return err;
1583 }
1584
1585 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1586 {
1587 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1588 int err;
1589 struct net_device *dev = info->user_ptr[1];
1590 struct key_parse key;
1591 const u8 *mac_addr = NULL;
1592
1593 err = nl80211_parse_key(info, &key);
1594 if (err)
1595 return err;
1596
1597 if (!key.p.key)
1598 return -EINVAL;
1599
1600 if (info->attrs[NL80211_ATTR_MAC])
1601 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1602
1603 if (key.type == -1) {
1604 if (mac_addr)
1605 key.type = NL80211_KEYTYPE_PAIRWISE;
1606 else
1607 key.type = NL80211_KEYTYPE_GROUP;
1608 }
1609
1610 /* for now */
1611 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1612 key.type != NL80211_KEYTYPE_GROUP)
1613 return -EINVAL;
1614
1615 if (!rdev->ops->add_key)
1616 return -EOPNOTSUPP;
1617
1618 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1619 key.type == NL80211_KEYTYPE_PAIRWISE,
1620 mac_addr))
1621 return -EINVAL;
1622
1623 wdev_lock(dev->ieee80211_ptr);
1624 err = nl80211_key_allowed(dev->ieee80211_ptr);
1625 if (!err)
1626 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1627 key.type == NL80211_KEYTYPE_PAIRWISE,
1628 mac_addr, &key.p);
1629 wdev_unlock(dev->ieee80211_ptr);
1630
1631 return err;
1632 }
1633
1634 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1635 {
1636 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1637 int err;
1638 struct net_device *dev = info->user_ptr[1];
1639 u8 *mac_addr = NULL;
1640 struct key_parse key;
1641
1642 err = nl80211_parse_key(info, &key);
1643 if (err)
1644 return err;
1645
1646 if (info->attrs[NL80211_ATTR_MAC])
1647 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1648
1649 if (key.type == -1) {
1650 if (mac_addr)
1651 key.type = NL80211_KEYTYPE_PAIRWISE;
1652 else
1653 key.type = NL80211_KEYTYPE_GROUP;
1654 }
1655
1656 /* for now */
1657 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1658 key.type != NL80211_KEYTYPE_GROUP)
1659 return -EINVAL;
1660
1661 if (!rdev->ops->del_key)
1662 return -EOPNOTSUPP;
1663
1664 wdev_lock(dev->ieee80211_ptr);
1665 err = nl80211_key_allowed(dev->ieee80211_ptr);
1666
1667 if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1668 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1669 err = -ENOENT;
1670
1671 if (!err)
1672 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1673 key.type == NL80211_KEYTYPE_PAIRWISE,
1674 mac_addr);
1675
1676 #ifdef CONFIG_CFG80211_WEXT
1677 if (!err) {
1678 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1679 dev->ieee80211_ptr->wext.default_key = -1;
1680 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1681 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1682 }
1683 #endif
1684 wdev_unlock(dev->ieee80211_ptr);
1685
1686 return err;
1687 }
1688
1689 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1690 {
1691 int (*call)(struct wiphy *wiphy, struct net_device *dev,
1692 struct beacon_parameters *info);
1693 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1694 struct net_device *dev = info->user_ptr[1];
1695 struct beacon_parameters params;
1696 int haveinfo = 0;
1697
1698 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1699 return -EINVAL;
1700
1701 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1702 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1703 return -EOPNOTSUPP;
1704
1705 switch (info->genlhdr->cmd) {
1706 case NL80211_CMD_NEW_BEACON:
1707 /* these are required for NEW_BEACON */
1708 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1709 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1710 !info->attrs[NL80211_ATTR_BEACON_HEAD])
1711 return -EINVAL;
1712
1713 call = rdev->ops->add_beacon;
1714 break;
1715 case NL80211_CMD_SET_BEACON:
1716 call = rdev->ops->set_beacon;
1717 break;
1718 default:
1719 WARN_ON(1);
1720 return -EOPNOTSUPP;
1721 }
1722
1723 if (!call)
1724 return -EOPNOTSUPP;
1725
1726 memset(&params, 0, sizeof(params));
1727
1728 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1729 params.interval =
1730 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1731 haveinfo = 1;
1732 }
1733
1734 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1735 params.dtim_period =
1736 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1737 haveinfo = 1;
1738 }
1739
1740 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1741 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1742 params.head_len =
1743 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1744 haveinfo = 1;
1745 }
1746
1747 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1748 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1749 params.tail_len =
1750 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1751 haveinfo = 1;
1752 }
1753
1754 if (!haveinfo)
1755 return -EINVAL;
1756
1757 return call(&rdev->wiphy, dev, &params);
1758 }
1759
1760 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1761 {
1762 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1763 struct net_device *dev = info->user_ptr[1];
1764
1765 if (!rdev->ops->del_beacon)
1766 return -EOPNOTSUPP;
1767
1768 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1769 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1770 return -EOPNOTSUPP;
1771
1772 return rdev->ops->del_beacon(&rdev->wiphy, dev);
1773 }
1774
1775 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1776 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1777 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1778 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1779 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1780 };
1781
1782 static int parse_station_flags(struct genl_info *info,
1783 struct station_parameters *params)
1784 {
1785 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1786 struct nlattr *nla;
1787 int flag;
1788
1789 /*
1790 * Try parsing the new attribute first so userspace
1791 * can specify both for older kernels.
1792 */
1793 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1794 if (nla) {
1795 struct nl80211_sta_flag_update *sta_flags;
1796
1797 sta_flags = nla_data(nla);
1798 params->sta_flags_mask = sta_flags->mask;
1799 params->sta_flags_set = sta_flags->set;
1800 if ((params->sta_flags_mask |
1801 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1802 return -EINVAL;
1803 return 0;
1804 }
1805
1806 /* if present, parse the old attribute */
1807
1808 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1809 if (!nla)
1810 return 0;
1811
1812 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1813 nla, sta_flags_policy))
1814 return -EINVAL;
1815
1816 params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1817 params->sta_flags_mask &= ~1;
1818
1819 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1820 if (flags[flag])
1821 params->sta_flags_set |= (1<<flag);
1822
1823 return 0;
1824 }
1825
1826 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1827 int flags, struct net_device *dev,
1828 const u8 *mac_addr, struct station_info *sinfo)
1829 {
1830 void *hdr;
1831 struct nlattr *sinfoattr, *txrate;
1832 u16 bitrate;
1833
1834 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1835 if (!hdr)
1836 return -1;
1837
1838 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1839 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1840
1841 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1842
1843 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1844 if (!sinfoattr)
1845 goto nla_put_failure;
1846 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1847 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1848 sinfo->inactive_time);
1849 if (sinfo->filled & STATION_INFO_RX_BYTES)
1850 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1851 sinfo->rx_bytes);
1852 if (sinfo->filled & STATION_INFO_TX_BYTES)
1853 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1854 sinfo->tx_bytes);
1855 if (sinfo->filled & STATION_INFO_LLID)
1856 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1857 sinfo->llid);
1858 if (sinfo->filled & STATION_INFO_PLID)
1859 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1860 sinfo->plid);
1861 if (sinfo->filled & STATION_INFO_PLINK_STATE)
1862 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1863 sinfo->plink_state);
1864 if (sinfo->filled & STATION_INFO_SIGNAL)
1865 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1866 sinfo->signal);
1867 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1868 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1869 if (!txrate)
1870 goto nla_put_failure;
1871
1872 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1873 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1874 if (bitrate > 0)
1875 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1876
1877 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1878 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1879 sinfo->txrate.mcs);
1880 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1881 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1882 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1883 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1884
1885 nla_nest_end(msg, txrate);
1886 }
1887 if (sinfo->filled & STATION_INFO_RX_PACKETS)
1888 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1889 sinfo->rx_packets);
1890 if (sinfo->filled & STATION_INFO_TX_PACKETS)
1891 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1892 sinfo->tx_packets);
1893 nla_nest_end(msg, sinfoattr);
1894
1895 return genlmsg_end(msg, hdr);
1896
1897 nla_put_failure:
1898 genlmsg_cancel(msg, hdr);
1899 return -EMSGSIZE;
1900 }
1901
1902 static int nl80211_dump_station(struct sk_buff *skb,
1903 struct netlink_callback *cb)
1904 {
1905 struct station_info sinfo;
1906 struct cfg80211_registered_device *dev;
1907 struct net_device *netdev;
1908 u8 mac_addr[ETH_ALEN];
1909 int sta_idx = cb->args[1];
1910 int err;
1911
1912 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
1913 if (err)
1914 return err;
1915
1916 if (!dev->ops->dump_station) {
1917 err = -EOPNOTSUPP;
1918 goto out_err;
1919 }
1920
1921 while (1) {
1922 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1923 mac_addr, &sinfo);
1924 if (err == -ENOENT)
1925 break;
1926 if (err)
1927 goto out_err;
1928
1929 if (nl80211_send_station(skb,
1930 NETLINK_CB(cb->skb).pid,
1931 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1932 netdev, mac_addr,
1933 &sinfo) < 0)
1934 goto out;
1935
1936 sta_idx++;
1937 }
1938
1939
1940 out:
1941 cb->args[1] = sta_idx;
1942 err = skb->len;
1943 out_err:
1944 nl80211_finish_netdev_dump(dev);
1945
1946 return err;
1947 }
1948
1949 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1950 {
1951 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1952 struct net_device *dev = info->user_ptr[1];
1953 struct station_info sinfo;
1954 struct sk_buff *msg;
1955 u8 *mac_addr = NULL;
1956 int err;
1957
1958 memset(&sinfo, 0, sizeof(sinfo));
1959
1960 if (!info->attrs[NL80211_ATTR_MAC])
1961 return -EINVAL;
1962
1963 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1964
1965 if (!rdev->ops->get_station)
1966 return -EOPNOTSUPP;
1967
1968 err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1969 if (err)
1970 return err;
1971
1972 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1973 if (!msg)
1974 return -ENOMEM;
1975
1976 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1977 dev, mac_addr, &sinfo) < 0) {
1978 nlmsg_free(msg);
1979 return -ENOBUFS;
1980 }
1981
1982 return genlmsg_reply(msg, info);
1983 }
1984
1985 /*
1986 * Get vlan interface making sure it is running and on the right wiphy.
1987 */
1988 static int get_vlan(struct genl_info *info,
1989 struct cfg80211_registered_device *rdev,
1990 struct net_device **vlan)
1991 {
1992 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1993 *vlan = NULL;
1994
1995 if (vlanattr) {
1996 *vlan = dev_get_by_index(genl_info_net(info),
1997 nla_get_u32(vlanattr));
1998 if (!*vlan)
1999 return -ENODEV;
2000 if (!(*vlan)->ieee80211_ptr)
2001 return -EINVAL;
2002 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2003 return -EINVAL;
2004 if (!netif_running(*vlan))
2005 return -ENETDOWN;
2006 }
2007 return 0;
2008 }
2009
2010 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2011 {
2012 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2013 int err;
2014 struct net_device *dev = info->user_ptr[1];
2015 struct station_parameters params;
2016 u8 *mac_addr = NULL;
2017
2018 memset(&params, 0, sizeof(params));
2019
2020 params.listen_interval = -1;
2021
2022 if (info->attrs[NL80211_ATTR_STA_AID])
2023 return -EINVAL;
2024
2025 if (!info->attrs[NL80211_ATTR_MAC])
2026 return -EINVAL;
2027
2028 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2029
2030 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2031 params.supported_rates =
2032 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2033 params.supported_rates_len =
2034 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2035 }
2036
2037 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2038 params.listen_interval =
2039 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2040
2041 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2042 params.ht_capa =
2043 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2044
2045 if (parse_station_flags(info, &params))
2046 return -EINVAL;
2047
2048 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2049 params.plink_action =
2050 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2051
2052 err = get_vlan(info, rdev, &params.vlan);
2053 if (err)
2054 goto out;
2055
2056 /* validate settings */
2057 err = 0;
2058
2059 switch (dev->ieee80211_ptr->iftype) {
2060 case NL80211_IFTYPE_AP:
2061 case NL80211_IFTYPE_AP_VLAN:
2062 case NL80211_IFTYPE_P2P_GO:
2063 /* disallow mesh-specific things */
2064 if (params.plink_action)
2065 err = -EINVAL;
2066 break;
2067 case NL80211_IFTYPE_P2P_CLIENT:
2068 case NL80211_IFTYPE_STATION:
2069 /* disallow everything but AUTHORIZED flag */
2070 if (params.plink_action)
2071 err = -EINVAL;
2072 if (params.vlan)
2073 err = -EINVAL;
2074 if (params.supported_rates)
2075 err = -EINVAL;
2076 if (params.ht_capa)
2077 err = -EINVAL;
2078 if (params.listen_interval >= 0)
2079 err = -EINVAL;
2080 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2081 err = -EINVAL;
2082 break;
2083 case NL80211_IFTYPE_MESH_POINT:
2084 /* disallow things mesh doesn't support */
2085 if (params.vlan)
2086 err = -EINVAL;
2087 if (params.ht_capa)
2088 err = -EINVAL;
2089 if (params.listen_interval >= 0)
2090 err = -EINVAL;
2091 if (params.supported_rates)
2092 err = -EINVAL;
2093 if (params.sta_flags_mask)
2094 err = -EINVAL;
2095 break;
2096 default:
2097 err = -EINVAL;
2098 }
2099
2100 if (err)
2101 goto out;
2102
2103 if (!rdev->ops->change_station) {
2104 err = -EOPNOTSUPP;
2105 goto out;
2106 }
2107
2108 err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2109
2110 out:
2111 if (params.vlan)
2112 dev_put(params.vlan);
2113
2114 return err;
2115 }
2116
2117 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2118 {
2119 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2120 int err;
2121 struct net_device *dev = info->user_ptr[1];
2122 struct station_parameters params;
2123 u8 *mac_addr = NULL;
2124
2125 memset(&params, 0, sizeof(params));
2126
2127 if (!info->attrs[NL80211_ATTR_MAC])
2128 return -EINVAL;
2129
2130 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2131 return -EINVAL;
2132
2133 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2134 return -EINVAL;
2135
2136 if (!info->attrs[NL80211_ATTR_STA_AID])
2137 return -EINVAL;
2138
2139 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2140 params.supported_rates =
2141 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2142 params.supported_rates_len =
2143 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2144 params.listen_interval =
2145 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2146
2147 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2148 if (!params.aid || params.aid > IEEE80211_MAX_AID)
2149 return -EINVAL;
2150
2151 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2152 params.ht_capa =
2153 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2154
2155 if (parse_station_flags(info, &params))
2156 return -EINVAL;
2157
2158 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2159 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2160 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2161 return -EINVAL;
2162
2163 err = get_vlan(info, rdev, &params.vlan);
2164 if (err)
2165 goto out;
2166
2167 /* validate settings */
2168 err = 0;
2169
2170 if (!rdev->ops->add_station) {
2171 err = -EOPNOTSUPP;
2172 goto out;
2173 }
2174
2175 err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2176
2177 out:
2178 if (params.vlan)
2179 dev_put(params.vlan);
2180 return err;
2181 }
2182
2183 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2184 {
2185 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2186 struct net_device *dev = info->user_ptr[1];
2187 u8 *mac_addr = NULL;
2188
2189 if (info->attrs[NL80211_ATTR_MAC])
2190 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2191
2192 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2193 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2194 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2195 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2196 return -EINVAL;
2197
2198 if (!rdev->ops->del_station)
2199 return -EOPNOTSUPP;
2200
2201 return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2202 }
2203
2204 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2205 int flags, struct net_device *dev,
2206 u8 *dst, u8 *next_hop,
2207 struct mpath_info *pinfo)
2208 {
2209 void *hdr;
2210 struct nlattr *pinfoattr;
2211
2212 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2213 if (!hdr)
2214 return -1;
2215
2216 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2217 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2218 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2219
2220 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2221
2222 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2223 if (!pinfoattr)
2224 goto nla_put_failure;
2225 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2226 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2227 pinfo->frame_qlen);
2228 if (pinfo->filled & MPATH_INFO_SN)
2229 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2230 pinfo->sn);
2231 if (pinfo->filled & MPATH_INFO_METRIC)
2232 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2233 pinfo->metric);
2234 if (pinfo->filled & MPATH_INFO_EXPTIME)
2235 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2236 pinfo->exptime);
2237 if (pinfo->filled & MPATH_INFO_FLAGS)
2238 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2239 pinfo->flags);
2240 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2241 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2242 pinfo->discovery_timeout);
2243 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2244 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2245 pinfo->discovery_retries);
2246
2247 nla_nest_end(msg, pinfoattr);
2248
2249 return genlmsg_end(msg, hdr);
2250
2251 nla_put_failure:
2252 genlmsg_cancel(msg, hdr);
2253 return -EMSGSIZE;
2254 }
2255
2256 static int nl80211_dump_mpath(struct sk_buff *skb,
2257 struct netlink_callback *cb)
2258 {
2259 struct mpath_info pinfo;
2260 struct cfg80211_registered_device *dev;
2261 struct net_device *netdev;
2262 u8 dst[ETH_ALEN];
2263 u8 next_hop[ETH_ALEN];
2264 int path_idx = cb->args[1];
2265 int err;
2266
2267 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2268 if (err)
2269 return err;
2270
2271 if (!dev->ops->dump_mpath) {
2272 err = -EOPNOTSUPP;
2273 goto out_err;
2274 }
2275
2276 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2277 err = -EOPNOTSUPP;
2278 goto out_err;
2279 }
2280
2281 while (1) {
2282 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2283 dst, next_hop, &pinfo);
2284 if (err == -ENOENT)
2285 break;
2286 if (err)
2287 goto out_err;
2288
2289 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2290 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2291 netdev, dst, next_hop,
2292 &pinfo) < 0)
2293 goto out;
2294
2295 path_idx++;
2296 }
2297
2298
2299 out:
2300 cb->args[1] = path_idx;
2301 err = skb->len;
2302 out_err:
2303 nl80211_finish_netdev_dump(dev);
2304 return err;
2305 }
2306
2307 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2308 {
2309 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2310 int err;
2311 struct net_device *dev = info->user_ptr[1];
2312 struct mpath_info pinfo;
2313 struct sk_buff *msg;
2314 u8 *dst = NULL;
2315 u8 next_hop[ETH_ALEN];
2316
2317 memset(&pinfo, 0, sizeof(pinfo));
2318
2319 if (!info->attrs[NL80211_ATTR_MAC])
2320 return -EINVAL;
2321
2322 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2323
2324 if (!rdev->ops->get_mpath)
2325 return -EOPNOTSUPP;
2326
2327 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2328 return -EOPNOTSUPP;
2329
2330 err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2331 if (err)
2332 return err;
2333
2334 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2335 if (!msg)
2336 return -ENOMEM;
2337
2338 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2339 dev, dst, next_hop, &pinfo) < 0) {
2340 nlmsg_free(msg);
2341 return -ENOBUFS;
2342 }
2343
2344 return genlmsg_reply(msg, info);
2345 }
2346
2347 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2348 {
2349 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2350 struct net_device *dev = info->user_ptr[1];
2351 u8 *dst = NULL;
2352 u8 *next_hop = NULL;
2353
2354 if (!info->attrs[NL80211_ATTR_MAC])
2355 return -EINVAL;
2356
2357 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2358 return -EINVAL;
2359
2360 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2361 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2362
2363 if (!rdev->ops->change_mpath)
2364 return -EOPNOTSUPP;
2365
2366 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2367 return -EOPNOTSUPP;
2368
2369 return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2370 }
2371
2372 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2373 {
2374 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2375 struct net_device *dev = info->user_ptr[1];
2376 u8 *dst = NULL;
2377 u8 *next_hop = NULL;
2378
2379 if (!info->attrs[NL80211_ATTR_MAC])
2380 return -EINVAL;
2381
2382 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2383 return -EINVAL;
2384
2385 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2386 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2387
2388 if (!rdev->ops->add_mpath)
2389 return -EOPNOTSUPP;
2390
2391 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2392 return -EOPNOTSUPP;
2393
2394 return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2395 }
2396
2397 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2398 {
2399 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2400 struct net_device *dev = info->user_ptr[1];
2401 u8 *dst = NULL;
2402
2403 if (info->attrs[NL80211_ATTR_MAC])
2404 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2405
2406 if (!rdev->ops->del_mpath)
2407 return -EOPNOTSUPP;
2408
2409 return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2410 }
2411
2412 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2413 {
2414 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2415 struct net_device *dev = info->user_ptr[1];
2416 struct bss_parameters params;
2417
2418 memset(&params, 0, sizeof(params));
2419 /* default to not changing parameters */
2420 params.use_cts_prot = -1;
2421 params.use_short_preamble = -1;
2422 params.use_short_slot_time = -1;
2423 params.ap_isolate = -1;
2424
2425 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2426 params.use_cts_prot =
2427 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2428 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2429 params.use_short_preamble =
2430 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2431 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2432 params.use_short_slot_time =
2433 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2434 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2435 params.basic_rates =
2436 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2437 params.basic_rates_len =
2438 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2439 }
2440 if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2441 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2442
2443 if (!rdev->ops->change_bss)
2444 return -EOPNOTSUPP;
2445
2446 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2447 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2448 return -EOPNOTSUPP;
2449
2450 return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2451 }
2452
2453 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2454 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
2455 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
2456 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
2457 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
2458 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
2459 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
2460 };
2461
2462 static int parse_reg_rule(struct nlattr *tb[],
2463 struct ieee80211_reg_rule *reg_rule)
2464 {
2465 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2466 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2467
2468 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2469 return -EINVAL;
2470 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2471 return -EINVAL;
2472 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2473 return -EINVAL;
2474 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2475 return -EINVAL;
2476 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2477 return -EINVAL;
2478
2479 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2480
2481 freq_range->start_freq_khz =
2482 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2483 freq_range->end_freq_khz =
2484 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2485 freq_range->max_bandwidth_khz =
2486 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2487
2488 power_rule->max_eirp =
2489 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2490
2491 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2492 power_rule->max_antenna_gain =
2493 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2494
2495 return 0;
2496 }
2497
2498 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2499 {
2500 int r;
2501 char *data = NULL;
2502
2503 /*
2504 * You should only get this when cfg80211 hasn't yet initialized
2505 * completely when built-in to the kernel right between the time
2506 * window between nl80211_init() and regulatory_init(), if that is
2507 * even possible.
2508 */
2509 mutex_lock(&cfg80211_mutex);
2510 if (unlikely(!cfg80211_regdomain)) {
2511 mutex_unlock(&cfg80211_mutex);
2512 return -EINPROGRESS;
2513 }
2514 mutex_unlock(&cfg80211_mutex);
2515
2516 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2517 return -EINVAL;
2518
2519 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2520
2521 r = regulatory_hint_user(data);
2522
2523 return r;
2524 }
2525
2526 static int nl80211_get_mesh_params(struct sk_buff *skb,
2527 struct genl_info *info)
2528 {
2529 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2530 struct mesh_config cur_params;
2531 int err;
2532 struct net_device *dev = info->user_ptr[1];
2533 void *hdr;
2534 struct nlattr *pinfoattr;
2535 struct sk_buff *msg;
2536
2537 if (!rdev->ops->get_mesh_params)
2538 return -EOPNOTSUPP;
2539
2540 /* Get the mesh params */
2541 err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2542 if (err)
2543 return err;
2544
2545 /* Draw up a netlink message to send back */
2546 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2547 if (!msg)
2548 return -ENOMEM;
2549 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2550 NL80211_CMD_GET_MESH_PARAMS);
2551 if (!hdr)
2552 goto nla_put_failure;
2553 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2554 if (!pinfoattr)
2555 goto nla_put_failure;
2556 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2557 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2558 cur_params.dot11MeshRetryTimeout);
2559 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2560 cur_params.dot11MeshConfirmTimeout);
2561 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2562 cur_params.dot11MeshHoldingTimeout);
2563 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2564 cur_params.dot11MeshMaxPeerLinks);
2565 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2566 cur_params.dot11MeshMaxRetries);
2567 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2568 cur_params.dot11MeshTTL);
2569 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2570 cur_params.auto_open_plinks);
2571 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2572 cur_params.dot11MeshHWMPmaxPREQretries);
2573 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2574 cur_params.path_refresh_time);
2575 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2576 cur_params.min_discovery_timeout);
2577 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2578 cur_params.dot11MeshHWMPactivePathTimeout);
2579 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2580 cur_params.dot11MeshHWMPpreqMinInterval);
2581 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2582 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2583 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2584 cur_params.dot11MeshHWMPRootMode);
2585 nla_nest_end(msg, pinfoattr);
2586 genlmsg_end(msg, hdr);
2587 return genlmsg_reply(msg, info);
2588
2589 nla_put_failure:
2590 genlmsg_cancel(msg, hdr);
2591 nlmsg_free(msg);
2592 return -ENOBUFS;
2593 }
2594
2595 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2596 do {\
2597 if (table[attr_num]) {\
2598 cfg.param = nla_fn(table[attr_num]); \
2599 mask |= (1 << (attr_num - 1)); \
2600 } \
2601 } while (0);\
2602
2603 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2604 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2605 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2606 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2607 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2608 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2609 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2610 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2611
2612 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2613 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2614 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2615 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2616 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2617 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2618 };
2619
2620 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2621 {
2622 u32 mask;
2623 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2624 struct net_device *dev = info->user_ptr[1];
2625 struct mesh_config cfg;
2626 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2627 struct nlattr *parent_attr;
2628
2629 parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2630 if (!parent_attr)
2631 return -EINVAL;
2632 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2633 parent_attr, nl80211_meshconf_params_policy))
2634 return -EINVAL;
2635
2636 if (!rdev->ops->set_mesh_params)
2637 return -EOPNOTSUPP;
2638
2639 /* This makes sure that there aren't more than 32 mesh config
2640 * parameters (otherwise our bitfield scheme would not work.) */
2641 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2642
2643 /* Fill in the params struct */
2644 mask = 0;
2645 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2646 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2647 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2648 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2649 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2650 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2651 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2652 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2653 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2654 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2655 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2656 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2657 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2658 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2659 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2660 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2661 nla_get_u8);
2662 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2663 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2664 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2665 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2666 nla_get_u16);
2667 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2668 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2669 nla_get_u32);
2670 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2671 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2672 nla_get_u16);
2673 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2674 dot11MeshHWMPnetDiameterTraversalTime,
2675 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2676 nla_get_u16);
2677 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2678 dot11MeshHWMPRootMode, mask,
2679 NL80211_MESHCONF_HWMP_ROOTMODE,
2680 nla_get_u8);
2681
2682 /* Apply changes */
2683 return rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2684 }
2685
2686 #undef FILL_IN_MESH_PARAM_IF_SET
2687
2688 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2689 {
2690 struct sk_buff *msg;
2691 void *hdr = NULL;
2692 struct nlattr *nl_reg_rules;
2693 unsigned int i;
2694 int err = -EINVAL;
2695
2696 mutex_lock(&cfg80211_mutex);
2697
2698 if (!cfg80211_regdomain)
2699 goto out;
2700
2701 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2702 if (!msg) {
2703 err = -ENOBUFS;
2704 goto out;
2705 }
2706
2707 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2708 NL80211_CMD_GET_REG);
2709 if (!hdr)
2710 goto nla_put_failure;
2711
2712 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2713 cfg80211_regdomain->alpha2);
2714
2715 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2716 if (!nl_reg_rules)
2717 goto nla_put_failure;
2718
2719 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2720 struct nlattr *nl_reg_rule;
2721 const struct ieee80211_reg_rule *reg_rule;
2722 const struct ieee80211_freq_range *freq_range;
2723 const struct ieee80211_power_rule *power_rule;
2724
2725 reg_rule = &cfg80211_regdomain->reg_rules[i];
2726 freq_range = &reg_rule->freq_range;
2727 power_rule = &reg_rule->power_rule;
2728
2729 nl_reg_rule = nla_nest_start(msg, i);
2730 if (!nl_reg_rule)
2731 goto nla_put_failure;
2732
2733 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2734 reg_rule->flags);
2735 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2736 freq_range->start_freq_khz);
2737 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2738 freq_range->end_freq_khz);
2739 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2740 freq_range->max_bandwidth_khz);
2741 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2742 power_rule->max_antenna_gain);
2743 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2744 power_rule->max_eirp);
2745
2746 nla_nest_end(msg, nl_reg_rule);
2747 }
2748
2749 nla_nest_end(msg, nl_reg_rules);
2750
2751 genlmsg_end(msg, hdr);
2752 err = genlmsg_reply(msg, info);
2753 goto out;
2754
2755 nla_put_failure:
2756 genlmsg_cancel(msg, hdr);
2757 nlmsg_free(msg);
2758 err = -EMSGSIZE;
2759 out:
2760 mutex_unlock(&cfg80211_mutex);
2761 return err;
2762 }
2763
2764 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2765 {
2766 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2767 struct nlattr *nl_reg_rule;
2768 char *alpha2 = NULL;
2769 int rem_reg_rules = 0, r = 0;
2770 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2771 struct ieee80211_regdomain *rd = NULL;
2772
2773 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2774 return -EINVAL;
2775
2776 if (!info->attrs[NL80211_ATTR_REG_RULES])
2777 return -EINVAL;
2778
2779 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2780
2781 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2782 rem_reg_rules) {
2783 num_rules++;
2784 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2785 return -EINVAL;
2786 }
2787
2788 mutex_lock(&cfg80211_mutex);
2789
2790 if (!reg_is_valid_request(alpha2)) {
2791 r = -EINVAL;
2792 goto bad_reg;
2793 }
2794
2795 size_of_regd = sizeof(struct ieee80211_regdomain) +
2796 (num_rules * sizeof(struct ieee80211_reg_rule));
2797
2798 rd = kzalloc(size_of_regd, GFP_KERNEL);
2799 if (!rd) {
2800 r = -ENOMEM;
2801 goto bad_reg;
2802 }
2803
2804 rd->n_reg_rules = num_rules;
2805 rd->alpha2[0] = alpha2[0];
2806 rd->alpha2[1] = alpha2[1];
2807
2808 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2809 rem_reg_rules) {
2810 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2811 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2812 reg_rule_policy);
2813 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2814 if (r)
2815 goto bad_reg;
2816
2817 rule_idx++;
2818
2819 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2820 r = -EINVAL;
2821 goto bad_reg;
2822 }
2823 }
2824
2825 BUG_ON(rule_idx != num_rules);
2826
2827 r = set_regdom(rd);
2828
2829 mutex_unlock(&cfg80211_mutex);
2830
2831 return r;
2832
2833 bad_reg:
2834 mutex_unlock(&cfg80211_mutex);
2835 kfree(rd);
2836 return r;
2837 }
2838
2839 static int validate_scan_freqs(struct nlattr *freqs)
2840 {
2841 struct nlattr *attr1, *attr2;
2842 int n_channels = 0, tmp1, tmp2;
2843
2844 nla_for_each_nested(attr1, freqs, tmp1) {
2845 n_channels++;
2846 /*
2847 * Some hardware has a limited channel list for
2848 * scanning, and it is pretty much nonsensical
2849 * to scan for a channel twice, so disallow that
2850 * and don't require drivers to check that the
2851 * channel list they get isn't longer than what
2852 * they can scan, as long as they can scan all
2853 * the channels they registered at once.
2854 */
2855 nla_for_each_nested(attr2, freqs, tmp2)
2856 if (attr1 != attr2 &&
2857 nla_get_u32(attr1) == nla_get_u32(attr2))
2858 return 0;
2859 }
2860
2861 return n_channels;
2862 }
2863
2864 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2865 {
2866 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2867 struct net_device *dev = info->user_ptr[1];
2868 struct cfg80211_scan_request *request;
2869 struct cfg80211_ssid *ssid;
2870 struct ieee80211_channel *channel;
2871 struct nlattr *attr;
2872 struct wiphy *wiphy;
2873 int err, tmp, n_ssids = 0, n_channels, i;
2874 enum ieee80211_band band;
2875 size_t ie_len;
2876
2877 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2878 return -EINVAL;
2879
2880 wiphy = &rdev->wiphy;
2881
2882 if (!rdev->ops->scan)
2883 return -EOPNOTSUPP;
2884
2885 if (rdev->scan_req)
2886 return -EBUSY;
2887
2888 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2889 n_channels = validate_scan_freqs(
2890 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2891 if (!n_channels)
2892 return -EINVAL;
2893 } else {
2894 n_channels = 0;
2895
2896 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2897 if (wiphy->bands[band])
2898 n_channels += wiphy->bands[band]->n_channels;
2899 }
2900
2901 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2902 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2903 n_ssids++;
2904
2905 if (n_ssids > wiphy->max_scan_ssids)
2906 return -EINVAL;
2907
2908 if (info->attrs[NL80211_ATTR_IE])
2909 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2910 else
2911 ie_len = 0;
2912
2913 if (ie_len > wiphy->max_scan_ie_len)
2914 return -EINVAL;
2915
2916 request = kzalloc(sizeof(*request)
2917 + sizeof(*ssid) * n_ssids
2918 + sizeof(channel) * n_channels
2919 + ie_len, GFP_KERNEL);
2920 if (!request)
2921 return -ENOMEM;
2922
2923 if (n_ssids)
2924 request->ssids = (void *)&request->channels[n_channels];
2925 request->n_ssids = n_ssids;
2926 if (ie_len) {
2927 if (request->ssids)
2928 request->ie = (void *)(request->ssids + n_ssids);
2929 else
2930 request->ie = (void *)(request->channels + n_channels);
2931 }
2932
2933 i = 0;
2934 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2935 /* user specified, bail out if channel not found */
2936 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2937 struct ieee80211_channel *chan;
2938
2939 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2940
2941 if (!chan) {
2942 err = -EINVAL;
2943 goto out_free;
2944 }
2945
2946 /* ignore disabled channels */
2947 if (chan->flags & IEEE80211_CHAN_DISABLED)
2948 continue;
2949
2950 request->channels[i] = chan;
2951 i++;
2952 }
2953 } else {
2954 /* all channels */
2955 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2956 int j;
2957 if (!wiphy->bands[band])
2958 continue;
2959 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2960 struct ieee80211_channel *chan;
2961
2962 chan = &wiphy->bands[band]->channels[j];
2963
2964 if (chan->flags & IEEE80211_CHAN_DISABLED)
2965 continue;
2966
2967 request->channels[i] = chan;
2968 i++;
2969 }
2970 }
2971 }
2972
2973 if (!i) {
2974 err = -EINVAL;
2975 goto out_free;
2976 }
2977
2978 request->n_channels = i;
2979
2980 i = 0;
2981 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2982 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2983 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2984 err = -EINVAL;
2985 goto out_free;
2986 }
2987 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2988 request->ssids[i].ssid_len = nla_len(attr);
2989 i++;
2990 }
2991 }
2992
2993 if (info->attrs[NL80211_ATTR_IE]) {
2994 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2995 memcpy((void *)request->ie,
2996 nla_data(info->attrs[NL80211_ATTR_IE]),
2997 request->ie_len);
2998 }
2999
3000 request->dev = dev;
3001 request->wiphy = &rdev->wiphy;
3002
3003 rdev->scan_req = request;
3004 err = rdev->ops->scan(&rdev->wiphy, dev, request);
3005
3006 if (!err) {
3007 nl80211_send_scan_start(rdev, dev);
3008 dev_hold(dev);
3009 } else {
3010 out_free:
3011 rdev->scan_req = NULL;
3012 kfree(request);
3013 }
3014
3015 return err;
3016 }
3017
3018 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3019 struct cfg80211_registered_device *rdev,
3020 struct wireless_dev *wdev,
3021 struct cfg80211_internal_bss *intbss)
3022 {
3023 struct cfg80211_bss *res = &intbss->pub;
3024 void *hdr;
3025 struct nlattr *bss;
3026 int i;
3027
3028 ASSERT_WDEV_LOCK(wdev);
3029
3030 hdr = nl80211hdr_put(msg, pid, seq, flags,
3031 NL80211_CMD_NEW_SCAN_RESULTS);
3032 if (!hdr)
3033 return -1;
3034
3035 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3036 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3037
3038 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3039 if (!bss)
3040 goto nla_put_failure;
3041 if (!is_zero_ether_addr(res->bssid))
3042 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3043 if (res->information_elements && res->len_information_elements)
3044 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3045 res->len_information_elements,
3046 res->information_elements);
3047 if (res->beacon_ies && res->len_beacon_ies &&
3048 res->beacon_ies != res->information_elements)
3049 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3050 res->len_beacon_ies, res->beacon_ies);
3051 if (res->tsf)
3052 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3053 if (res->beacon_interval)
3054 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3055 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3056 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3057 NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3058 jiffies_to_msecs(jiffies - intbss->ts));
3059
3060 switch (rdev->wiphy.signal_type) {
3061 case CFG80211_SIGNAL_TYPE_MBM:
3062 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3063 break;
3064 case CFG80211_SIGNAL_TYPE_UNSPEC:
3065 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3066 break;
3067 default:
3068 break;
3069 }
3070
3071 switch (wdev->iftype) {
3072 case NL80211_IFTYPE_P2P_CLIENT:
3073 case NL80211_IFTYPE_STATION:
3074 if (intbss == wdev->current_bss)
3075 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3076 NL80211_BSS_STATUS_ASSOCIATED);
3077 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3078 if (intbss != wdev->auth_bsses[i])
3079 continue;
3080 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3081 NL80211_BSS_STATUS_AUTHENTICATED);
3082 break;
3083 }
3084 break;
3085 case NL80211_IFTYPE_ADHOC:
3086 if (intbss == wdev->current_bss)
3087 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3088 NL80211_BSS_STATUS_IBSS_JOINED);
3089 break;
3090 default:
3091 break;
3092 }
3093
3094 nla_nest_end(msg, bss);
3095
3096 return genlmsg_end(msg, hdr);
3097
3098 nla_put_failure:
3099 genlmsg_cancel(msg, hdr);
3100 return -EMSGSIZE;
3101 }
3102
3103 static int nl80211_dump_scan(struct sk_buff *skb,
3104 struct netlink_callback *cb)
3105 {
3106 struct cfg80211_registered_device *rdev;
3107 struct net_device *dev;
3108 struct cfg80211_internal_bss *scan;
3109 struct wireless_dev *wdev;
3110 int start = cb->args[1], idx = 0;
3111 int err;
3112
3113 err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3114 if (err)
3115 return err;
3116
3117 wdev = dev->ieee80211_ptr;
3118
3119 wdev_lock(wdev);
3120 spin_lock_bh(&rdev->bss_lock);
3121 cfg80211_bss_expire(rdev);
3122
3123 list_for_each_entry(scan, &rdev->bss_list, list) {
3124 if (++idx <= start)
3125 continue;
3126 if (nl80211_send_bss(skb,
3127 NETLINK_CB(cb->skb).pid,
3128 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3129 rdev, wdev, scan) < 0) {
3130 idx--;
3131 break;
3132 }
3133 }
3134
3135 spin_unlock_bh(&rdev->bss_lock);
3136 wdev_unlock(wdev);
3137
3138 cb->args[1] = idx;
3139 nl80211_finish_netdev_dump(rdev);
3140
3141 return skb->len;
3142 }
3143
3144 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3145 int flags, struct net_device *dev,
3146 struct survey_info *survey)
3147 {
3148 void *hdr;
3149 struct nlattr *infoattr;
3150
3151 /* Survey without a channel doesn't make sense */
3152 if (!survey->channel)
3153 return -EINVAL;
3154
3155 hdr = nl80211hdr_put(msg, pid, seq, flags,
3156 NL80211_CMD_NEW_SURVEY_RESULTS);
3157 if (!hdr)
3158 return -ENOMEM;
3159
3160 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3161
3162 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3163 if (!infoattr)
3164 goto nla_put_failure;
3165
3166 NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3167 survey->channel->center_freq);
3168 if (survey->filled & SURVEY_INFO_NOISE_DBM)
3169 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3170 survey->noise);
3171 if (survey->filled & SURVEY_INFO_IN_USE)
3172 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3173
3174 nla_nest_end(msg, infoattr);
3175
3176 return genlmsg_end(msg, hdr);
3177
3178 nla_put_failure:
3179 genlmsg_cancel(msg, hdr);
3180 return -EMSGSIZE;
3181 }
3182
3183 static int nl80211_dump_survey(struct sk_buff *skb,
3184 struct netlink_callback *cb)
3185 {
3186 struct survey_info survey;
3187 struct cfg80211_registered_device *dev;
3188 struct net_device *netdev;
3189 int survey_idx = cb->args[1];
3190 int res;
3191
3192 res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3193 if (res)
3194 return res;
3195
3196 if (!dev->ops->dump_survey) {
3197 res = -EOPNOTSUPP;
3198 goto out_err;
3199 }
3200
3201 while (1) {
3202 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3203 &survey);
3204 if (res == -ENOENT)
3205 break;
3206 if (res)
3207 goto out_err;
3208
3209 if (nl80211_send_survey(skb,
3210 NETLINK_CB(cb->skb).pid,
3211 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3212 netdev,
3213 &survey) < 0)
3214 goto out;
3215 survey_idx++;
3216 }
3217
3218 out:
3219 cb->args[1] = survey_idx;
3220 res = skb->len;
3221 out_err:
3222 nl80211_finish_netdev_dump(dev);
3223 return res;
3224 }
3225
3226 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3227 {
3228 return auth_type <= NL80211_AUTHTYPE_MAX;
3229 }
3230
3231 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3232 {
3233 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3234 NL80211_WPA_VERSION_2));
3235 }
3236
3237 static bool nl80211_valid_akm_suite(u32 akm)
3238 {
3239 return akm == WLAN_AKM_SUITE_8021X ||
3240 akm == WLAN_AKM_SUITE_PSK;
3241 }
3242
3243 static bool nl80211_valid_cipher_suite(u32 cipher)
3244 {
3245 return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3246 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3247 cipher == WLAN_CIPHER_SUITE_TKIP ||
3248 cipher == WLAN_CIPHER_SUITE_CCMP ||
3249 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3250 }
3251
3252
3253 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3254 {
3255 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3256 struct net_device *dev = info->user_ptr[1];
3257 struct ieee80211_channel *chan;
3258 const u8 *bssid, *ssid, *ie = NULL;
3259 int err, ssid_len, ie_len = 0;
3260 enum nl80211_auth_type auth_type;
3261 struct key_parse key;
3262 bool local_state_change;
3263
3264 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3265 return -EINVAL;
3266
3267 if (!info->attrs[NL80211_ATTR_MAC])
3268 return -EINVAL;
3269
3270 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3271 return -EINVAL;
3272
3273 if (!info->attrs[NL80211_ATTR_SSID])
3274 return -EINVAL;
3275
3276 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3277 return -EINVAL;
3278
3279 err = nl80211_parse_key(info, &key);
3280 if (err)
3281 return err;
3282
3283 if (key.idx >= 0) {
3284 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3285 return -EINVAL;
3286 if (!key.p.key || !key.p.key_len)
3287 return -EINVAL;
3288 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3289 key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3290 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3291 key.p.key_len != WLAN_KEY_LEN_WEP104))
3292 return -EINVAL;
3293 if (key.idx > 4)
3294 return -EINVAL;
3295 } else {
3296 key.p.key_len = 0;
3297 key.p.key = NULL;
3298 }
3299
3300 if (key.idx >= 0) {
3301 int i;
3302 bool ok = false;
3303 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3304 if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3305 ok = true;
3306 break;
3307 }
3308 }
3309 if (!ok)
3310 return -EINVAL;
3311 }
3312
3313 if (!rdev->ops->auth)
3314 return -EOPNOTSUPP;
3315
3316 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3317 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3318 return -EOPNOTSUPP;
3319
3320 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3321 chan = ieee80211_get_channel(&rdev->wiphy,
3322 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3323 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3324 return -EINVAL;
3325
3326 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3327 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3328
3329 if (info->attrs[NL80211_ATTR_IE]) {
3330 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3331 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3332 }
3333
3334 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3335 if (!nl80211_valid_auth_type(auth_type))
3336 return -EINVAL;
3337
3338 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3339
3340 return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3341 ssid, ssid_len, ie, ie_len,
3342 key.p.key, key.p.key_len, key.idx,
3343 local_state_change);
3344 }
3345
3346 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3347 struct genl_info *info,
3348 struct cfg80211_crypto_settings *settings,
3349 int cipher_limit)
3350 {
3351 memset(settings, 0, sizeof(*settings));
3352
3353 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3354
3355 if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3356 u16 proto;
3357 proto = nla_get_u16(
3358 info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3359 settings->control_port_ethertype = cpu_to_be16(proto);
3360 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3361 proto != ETH_P_PAE)
3362 return -EINVAL;
3363 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3364 settings->control_port_no_encrypt = true;
3365 } else
3366 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3367
3368 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3369 void *data;
3370 int len, i;
3371
3372 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3373 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3374 settings->n_ciphers_pairwise = len / sizeof(u32);
3375
3376 if (len % sizeof(u32))
3377 return -EINVAL;
3378
3379 if (settings->n_ciphers_pairwise > cipher_limit)
3380 return -EINVAL;
3381
3382 memcpy(settings->ciphers_pairwise, data, len);
3383
3384 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3385 if (!nl80211_valid_cipher_suite(
3386 settings->ciphers_pairwise[i]))
3387 return -EINVAL;
3388 }
3389
3390 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3391 settings->cipher_group =
3392 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3393 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3394 return -EINVAL;
3395 }
3396
3397 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3398 settings->wpa_versions =
3399 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3400 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3401 return -EINVAL;
3402 }
3403
3404 if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3405 void *data;
3406 int len, i;
3407
3408 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3409 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3410 settings->n_akm_suites = len / sizeof(u32);
3411
3412 if (len % sizeof(u32))
3413 return -EINVAL;
3414
3415 memcpy(settings->akm_suites, data, len);
3416
3417 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3418 if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3419 return -EINVAL;
3420 }
3421
3422 return 0;
3423 }
3424
3425 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3426 {
3427 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3428 struct net_device *dev = info->user_ptr[1];
3429 struct cfg80211_crypto_settings crypto;
3430 struct ieee80211_channel *chan;
3431 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3432 int err, ssid_len, ie_len = 0;
3433 bool use_mfp = false;
3434
3435 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3436 return -EINVAL;
3437
3438 if (!info->attrs[NL80211_ATTR_MAC] ||
3439 !info->attrs[NL80211_ATTR_SSID] ||
3440 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3441 return -EINVAL;
3442
3443 if (!rdev->ops->assoc)
3444 return -EOPNOTSUPP;
3445
3446 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3447 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3448 return -EOPNOTSUPP;
3449
3450 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3451
3452 chan = ieee80211_get_channel(&rdev->wiphy,
3453 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3454 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3455 return -EINVAL;
3456
3457 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3458 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3459
3460 if (info->attrs[NL80211_ATTR_IE]) {
3461 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3462 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3463 }
3464
3465 if (info->attrs[NL80211_ATTR_USE_MFP]) {
3466 enum nl80211_mfp mfp =
3467 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3468 if (mfp == NL80211_MFP_REQUIRED)
3469 use_mfp = true;
3470 else if (mfp != NL80211_MFP_NO)
3471 return -EINVAL;
3472 }
3473
3474 if (info->attrs[NL80211_ATTR_PREV_BSSID])
3475 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3476
3477 err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3478 if (!err)
3479 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3480 ssid, ssid_len, ie, ie_len, use_mfp,
3481 &crypto);
3482
3483 return err;
3484 }
3485
3486 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3487 {
3488 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3489 struct net_device *dev = info->user_ptr[1];
3490 const u8 *ie = NULL, *bssid;
3491 int ie_len = 0;
3492 u16 reason_code;
3493 bool local_state_change;
3494
3495 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3496 return -EINVAL;
3497
3498 if (!info->attrs[NL80211_ATTR_MAC])
3499 return -EINVAL;
3500
3501 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3502 return -EINVAL;
3503
3504 if (!rdev->ops->deauth)
3505 return -EOPNOTSUPP;
3506
3507 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3508 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3509 return -EOPNOTSUPP;
3510
3511 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3512
3513 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3514 if (reason_code == 0) {
3515 /* Reason Code 0 is reserved */
3516 return -EINVAL;
3517 }
3518
3519 if (info->attrs[NL80211_ATTR_IE]) {
3520 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3521 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3522 }
3523
3524 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3525
3526 return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3527 local_state_change);
3528 }
3529
3530 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3531 {
3532 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3533 struct net_device *dev = info->user_ptr[1];
3534 const u8 *ie = NULL, *bssid;
3535 int ie_len = 0;
3536 u16 reason_code;
3537 bool local_state_change;
3538
3539 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3540 return -EINVAL;
3541
3542 if (!info->attrs[NL80211_ATTR_MAC])
3543 return -EINVAL;
3544
3545 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3546 return -EINVAL;
3547
3548 if (!rdev->ops->disassoc)
3549 return -EOPNOTSUPP;
3550
3551 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3552 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3553 return -EOPNOTSUPP;
3554
3555 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3556
3557 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3558 if (reason_code == 0) {
3559 /* Reason Code 0 is reserved */
3560 return -EINVAL;
3561 }
3562
3563 if (info->attrs[NL80211_ATTR_IE]) {
3564 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3565 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3566 }
3567
3568 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3569
3570 return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3571 local_state_change);
3572 }
3573
3574 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3575 {
3576 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3577 struct net_device *dev = info->user_ptr[1];
3578 struct cfg80211_ibss_params ibss;
3579 struct wiphy *wiphy;
3580 struct cfg80211_cached_keys *connkeys = NULL;
3581 int err;
3582
3583 memset(&ibss, 0, sizeof(ibss));
3584
3585 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3586 return -EINVAL;
3587
3588 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3589 !info->attrs[NL80211_ATTR_SSID] ||
3590 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3591 return -EINVAL;
3592
3593 ibss.beacon_interval = 100;
3594
3595 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3596 ibss.beacon_interval =
3597 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3598 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3599 return -EINVAL;
3600 }
3601
3602 if (!rdev->ops->join_ibss)
3603 return -EOPNOTSUPP;
3604
3605 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3606 return -EOPNOTSUPP;
3607
3608 wiphy = &rdev->wiphy;
3609
3610 if (info->attrs[NL80211_ATTR_MAC])
3611 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3612 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3613 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3614
3615 if (info->attrs[NL80211_ATTR_IE]) {
3616 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3617 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3618 }
3619
3620 ibss.channel = ieee80211_get_channel(wiphy,
3621 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3622 if (!ibss.channel ||
3623 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3624 ibss.channel->flags & IEEE80211_CHAN_DISABLED)
3625 return -EINVAL;
3626
3627 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3628 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3629
3630 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3631 u8 *rates =
3632 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3633 int n_rates =
3634 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3635 struct ieee80211_supported_band *sband =
3636 wiphy->bands[ibss.channel->band];
3637 int i, j;
3638
3639 if (n_rates == 0)
3640 return -EINVAL;
3641
3642 for (i = 0; i < n_rates; i++) {
3643 int rate = (rates[i] & 0x7f) * 5;
3644 bool found = false;
3645
3646 for (j = 0; j < sband->n_bitrates; j++) {
3647 if (sband->bitrates[j].bitrate == rate) {
3648 found = true;
3649 ibss.basic_rates |= BIT(j);
3650 break;
3651 }
3652 }
3653 if (!found)
3654 return -EINVAL;
3655 }
3656 }
3657
3658 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3659 connkeys = nl80211_parse_connkeys(rdev,
3660 info->attrs[NL80211_ATTR_KEYS]);
3661 if (IS_ERR(connkeys))
3662 return PTR_ERR(connkeys);
3663 }
3664
3665 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3666 if (err)
3667 kfree(connkeys);
3668 return err;
3669 }
3670
3671 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3672 {
3673 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3674 struct net_device *dev = info->user_ptr[1];
3675
3676 if (!rdev->ops->leave_ibss)
3677 return -EOPNOTSUPP;
3678
3679 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3680 return -EOPNOTSUPP;
3681
3682 return cfg80211_leave_ibss(rdev, dev, false);
3683 }
3684
3685 #ifdef CONFIG_NL80211_TESTMODE
3686 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3687 .name = "testmode",
3688 };
3689
3690 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3691 {
3692 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3693 int err;
3694
3695 if (!info->attrs[NL80211_ATTR_TESTDATA])
3696 return -EINVAL;
3697
3698 err = -EOPNOTSUPP;
3699 if (rdev->ops->testmode_cmd) {
3700 rdev->testmode_info = info;
3701 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3702 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3703 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3704 rdev->testmode_info = NULL;
3705 }
3706
3707 return err;
3708 }
3709
3710 static struct sk_buff *
3711 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3712 int approxlen, u32 pid, u32 seq, gfp_t gfp)
3713 {
3714 struct sk_buff *skb;
3715 void *hdr;
3716 struct nlattr *data;
3717
3718 skb = nlmsg_new(approxlen + 100, gfp);
3719 if (!skb)
3720 return NULL;
3721
3722 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3723 if (!hdr) {
3724 kfree_skb(skb);
3725 return NULL;
3726 }
3727
3728 NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3729 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3730
3731 ((void **)skb->cb)[0] = rdev;
3732 ((void **)skb->cb)[1] = hdr;
3733 ((void **)skb->cb)[2] = data;
3734
3735 return skb;
3736
3737 nla_put_failure:
3738 kfree_skb(skb);
3739 return NULL;
3740 }
3741
3742 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3743 int approxlen)
3744 {
3745 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3746
3747 if (WARN_ON(!rdev->testmode_info))
3748 return NULL;
3749
3750 return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3751 rdev->testmode_info->snd_pid,
3752 rdev->testmode_info->snd_seq,
3753 GFP_KERNEL);
3754 }
3755 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3756
3757 int cfg80211_testmode_reply(struct sk_buff *skb)
3758 {
3759 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3760 void *hdr = ((void **)skb->cb)[1];
3761 struct nlattr *data = ((void **)skb->cb)[2];
3762
3763 if (WARN_ON(!rdev->testmode_info)) {
3764 kfree_skb(skb);
3765 return -EINVAL;
3766 }
3767
3768 nla_nest_end(skb, data);
3769 genlmsg_end(skb, hdr);
3770 return genlmsg_reply(skb, rdev->testmode_info);
3771 }
3772 EXPORT_SYMBOL(cfg80211_testmode_reply);
3773
3774 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
3775 int approxlen, gfp_t gfp)
3776 {
3777 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3778
3779 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
3780 }
3781 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
3782
3783 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
3784 {
3785 void *hdr = ((void **)skb->cb)[1];
3786 struct nlattr *data = ((void **)skb->cb)[2];
3787
3788 nla_nest_end(skb, data);
3789 genlmsg_end(skb, hdr);
3790 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
3791 }
3792 EXPORT_SYMBOL(cfg80211_testmode_event);
3793 #endif
3794
3795 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
3796 {
3797 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3798 struct net_device *dev = info->user_ptr[1];
3799 struct cfg80211_connect_params connect;
3800 struct wiphy *wiphy;
3801 struct cfg80211_cached_keys *connkeys = NULL;
3802 int err;
3803
3804 memset(&connect, 0, sizeof(connect));
3805
3806 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3807 return -EINVAL;
3808
3809 if (!info->attrs[NL80211_ATTR_SSID] ||
3810 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3811 return -EINVAL;
3812
3813 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3814 connect.auth_type =
3815 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3816 if (!nl80211_valid_auth_type(connect.auth_type))
3817 return -EINVAL;
3818 } else
3819 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3820
3821 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
3822
3823 err = nl80211_crypto_settings(rdev, info, &connect.crypto,
3824 NL80211_MAX_NR_CIPHER_SUITES);
3825 if (err)
3826 return err;
3827
3828 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3829 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3830 return -EOPNOTSUPP;
3831
3832 wiphy = &rdev->wiphy;
3833
3834 if (info->attrs[NL80211_ATTR_MAC])
3835 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3836 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3837 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3838
3839 if (info->attrs[NL80211_ATTR_IE]) {
3840 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3841 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3842 }
3843
3844 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3845 connect.channel =
3846 ieee80211_get_channel(wiphy,
3847 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3848 if (!connect.channel ||
3849 connect.channel->flags & IEEE80211_CHAN_DISABLED)
3850 return -EINVAL;
3851 }
3852
3853 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3854 connkeys = nl80211_parse_connkeys(rdev,
3855 info->attrs[NL80211_ATTR_KEYS]);
3856 if (IS_ERR(connkeys))
3857 return PTR_ERR(connkeys);
3858 }
3859
3860 err = cfg80211_connect(rdev, dev, &connect, connkeys);
3861 if (err)
3862 kfree(connkeys);
3863 return err;
3864 }
3865
3866 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
3867 {
3868 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3869 struct net_device *dev = info->user_ptr[1];
3870 u16 reason;
3871
3872 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3873 reason = WLAN_REASON_DEAUTH_LEAVING;
3874 else
3875 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3876
3877 if (reason == 0)
3878 return -EINVAL;
3879
3880 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3881 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3882 return -EOPNOTSUPP;
3883
3884 return cfg80211_disconnect(rdev, dev, reason, true);
3885 }
3886
3887 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
3888 {
3889 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3890 struct net *net;
3891 int err;
3892 u32 pid;
3893
3894 if (!info->attrs[NL80211_ATTR_PID])
3895 return -EINVAL;
3896
3897 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
3898
3899 net = get_net_ns_by_pid(pid);
3900 if (IS_ERR(net))
3901 return PTR_ERR(net);
3902
3903 err = 0;
3904
3905 /* check if anything to do */
3906 if (!net_eq(wiphy_net(&rdev->wiphy), net))
3907 err = cfg80211_switch_netns(rdev, net);
3908
3909 put_net(net);
3910 return err;
3911 }
3912
3913 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
3914 {
3915 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3916 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
3917 struct cfg80211_pmksa *pmksa) = NULL;
3918 struct net_device *dev = info->user_ptr[1];
3919 struct cfg80211_pmksa pmksa;
3920
3921 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
3922
3923 if (!info->attrs[NL80211_ATTR_MAC])
3924 return -EINVAL;
3925
3926 if (!info->attrs[NL80211_ATTR_PMKID])
3927 return -EINVAL;
3928
3929 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
3930 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3931
3932 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3933 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3934 return -EOPNOTSUPP;
3935
3936 switch (info->genlhdr->cmd) {
3937 case NL80211_CMD_SET_PMKSA:
3938 rdev_ops = rdev->ops->set_pmksa;
3939 break;
3940 case NL80211_CMD_DEL_PMKSA:
3941 rdev_ops = rdev->ops->del_pmksa;
3942 break;
3943 default:
3944 WARN_ON(1);
3945 break;
3946 }
3947
3948 if (!rdev_ops)
3949 return -EOPNOTSUPP;
3950
3951 return rdev_ops(&rdev->wiphy, dev, &pmksa);
3952 }
3953
3954 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
3955 {
3956 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3957 struct net_device *dev = info->user_ptr[1];
3958
3959 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3960 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3961 return -EOPNOTSUPP;
3962
3963 if (!rdev->ops->flush_pmksa)
3964 return -EOPNOTSUPP;
3965
3966 return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
3967 }
3968
3969 static int nl80211_remain_on_channel(struct sk_buff *skb,
3970 struct genl_info *info)
3971 {
3972 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3973 struct net_device *dev = info->user_ptr[1];
3974 struct ieee80211_channel *chan;
3975 struct sk_buff *msg;
3976 void *hdr;
3977 u64 cookie;
3978 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3979 u32 freq, duration;
3980 int err;
3981
3982 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3983 !info->attrs[NL80211_ATTR_DURATION])
3984 return -EINVAL;
3985
3986 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
3987
3988 /*
3989 * We should be on that channel for at least one jiffie,
3990 * and more than 5 seconds seems excessive.
3991 */
3992 if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
3993 return -EINVAL;
3994
3995 if (!rdev->ops->remain_on_channel)
3996 return -EOPNOTSUPP;
3997
3998 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
3999 channel_type = nla_get_u32(
4000 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4001 if (channel_type != NL80211_CHAN_NO_HT &&
4002 channel_type != NL80211_CHAN_HT20 &&
4003 channel_type != NL80211_CHAN_HT40PLUS &&
4004 channel_type != NL80211_CHAN_HT40MINUS)
4005 return -EINVAL;
4006 }
4007
4008 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4009 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4010 if (chan == NULL)
4011 return -EINVAL;
4012
4013 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4014 if (!msg)
4015 return -ENOMEM;
4016
4017 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4018 NL80211_CMD_REMAIN_ON_CHANNEL);
4019
4020 if (IS_ERR(hdr)) {
4021 err = PTR_ERR(hdr);
4022 goto free_msg;
4023 }
4024
4025 err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4026 channel_type, duration, &cookie);
4027
4028 if (err)
4029 goto free_msg;
4030
4031 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4032
4033 genlmsg_end(msg, hdr);
4034
4035 return genlmsg_reply(msg, info);
4036
4037 nla_put_failure:
4038 err = -ENOBUFS;
4039 free_msg:
4040 nlmsg_free(msg);
4041 return err;
4042 }
4043
4044 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4045 struct genl_info *info)
4046 {
4047 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4048 struct net_device *dev = info->user_ptr[1];
4049 u64 cookie;
4050
4051 if (!info->attrs[NL80211_ATTR_COOKIE])
4052 return -EINVAL;
4053
4054 if (!rdev->ops->cancel_remain_on_channel)
4055 return -EOPNOTSUPP;
4056
4057 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4058
4059 return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4060 }
4061
4062 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4063 u8 *rates, u8 rates_len)
4064 {
4065 u8 i;
4066 u32 mask = 0;
4067
4068 for (i = 0; i < rates_len; i++) {
4069 int rate = (rates[i] & 0x7f) * 5;
4070 int ridx;
4071 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4072 struct ieee80211_rate *srate =
4073 &sband->bitrates[ridx];
4074 if (rate == srate->bitrate) {
4075 mask |= 1 << ridx;
4076 break;
4077 }
4078 }
4079 if (ridx == sband->n_bitrates)
4080 return 0; /* rate not found */
4081 }
4082
4083 return mask;
4084 }
4085
4086 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4087 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4088 .len = NL80211_MAX_SUPP_RATES },
4089 };
4090
4091 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4092 struct genl_info *info)
4093 {
4094 struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4095 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4096 struct cfg80211_bitrate_mask mask;
4097 int rem, i;
4098 struct net_device *dev = info->user_ptr[1];
4099 struct nlattr *tx_rates;
4100 struct ieee80211_supported_band *sband;
4101
4102 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4103 return -EINVAL;
4104
4105 if (!rdev->ops->set_bitrate_mask)
4106 return -EOPNOTSUPP;
4107
4108 memset(&mask, 0, sizeof(mask));
4109 /* Default to all rates enabled */
4110 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4111 sband = rdev->wiphy.bands[i];
4112 mask.control[i].legacy =
4113 sband ? (1 << sband->n_bitrates) - 1 : 0;
4114 }
4115
4116 /*
4117 * The nested attribute uses enum nl80211_band as the index. This maps
4118 * directly to the enum ieee80211_band values used in cfg80211.
4119 */
4120 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4121 {
4122 enum ieee80211_band band = nla_type(tx_rates);
4123 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4124 return -EINVAL;
4125 sband = rdev->wiphy.bands[band];
4126 if (sband == NULL)
4127 return -EINVAL;
4128 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4129 nla_len(tx_rates), nl80211_txattr_policy);
4130 if (tb[NL80211_TXRATE_LEGACY]) {
4131 mask.control[band].legacy = rateset_to_mask(
4132 sband,
4133 nla_data(tb[NL80211_TXRATE_LEGACY]),
4134 nla_len(tb[NL80211_TXRATE_LEGACY]));
4135 if (mask.control[band].legacy == 0)
4136 return -EINVAL;
4137 }
4138 }
4139
4140 return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4141 }
4142
4143 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4144 {
4145 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4146 struct net_device *dev = info->user_ptr[1];
4147 u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4148
4149 if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4150 return -EINVAL;
4151
4152 if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4153 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4154
4155 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4156 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4157 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4158 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4159 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4160 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4161 return -EOPNOTSUPP;
4162
4163 /* not much point in registering if we can't reply */
4164 if (!rdev->ops->mgmt_tx)
4165 return -EOPNOTSUPP;
4166
4167 return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4168 frame_type,
4169 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4170 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4171 }
4172
4173 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4174 {
4175 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4176 struct net_device *dev = info->user_ptr[1];
4177 struct ieee80211_channel *chan;
4178 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4179 bool channel_type_valid = false;
4180 u32 freq;
4181 int err;
4182 void *hdr;
4183 u64 cookie;
4184 struct sk_buff *msg;
4185
4186 if (!info->attrs[NL80211_ATTR_FRAME] ||
4187 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4188 return -EINVAL;
4189
4190 if (!rdev->ops->mgmt_tx)
4191 return -EOPNOTSUPP;
4192
4193 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4194 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4195 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4196 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4197 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4198 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4199 return -EOPNOTSUPP;
4200
4201 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4202 channel_type = nla_get_u32(
4203 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4204 if (channel_type != NL80211_CHAN_NO_HT &&
4205 channel_type != NL80211_CHAN_HT20 &&
4206 channel_type != NL80211_CHAN_HT40PLUS &&
4207 channel_type != NL80211_CHAN_HT40MINUS)
4208 return -EINVAL;
4209 channel_type_valid = true;
4210 }
4211
4212 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4213 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4214 if (chan == NULL)
4215 return -EINVAL;
4216
4217 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4218 if (!msg)
4219 return -ENOMEM;
4220
4221 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4222 NL80211_CMD_FRAME);
4223
4224 if (IS_ERR(hdr)) {
4225 err = PTR_ERR(hdr);
4226 goto free_msg;
4227 }
4228 err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, channel_type,
4229 channel_type_valid,
4230 nla_data(info->attrs[NL80211_ATTR_FRAME]),
4231 nla_len(info->attrs[NL80211_ATTR_FRAME]),
4232 &cookie);
4233 if (err)
4234 goto free_msg;
4235
4236 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4237
4238 genlmsg_end(msg, hdr);
4239 return genlmsg_reply(msg, info);
4240
4241 nla_put_failure:
4242 err = -ENOBUFS;
4243 free_msg:
4244 nlmsg_free(msg);
4245 return err;
4246 }
4247
4248 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4249 {
4250 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4251 struct wireless_dev *wdev;
4252 struct net_device *dev = info->user_ptr[1];
4253 u8 ps_state;
4254 bool state;
4255 int err;
4256
4257 if (!info->attrs[NL80211_ATTR_PS_STATE])
4258 return -EINVAL;
4259
4260 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4261
4262 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4263 return -EINVAL;
4264
4265 wdev = dev->ieee80211_ptr;
4266
4267 if (!rdev->ops->set_power_mgmt)
4268 return -EOPNOTSUPP;
4269
4270 state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4271
4272 if (state == wdev->ps)
4273 return 0;
4274
4275 err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4276 wdev->ps_timeout);
4277 if (!err)
4278 wdev->ps = state;
4279 return err;
4280 }
4281
4282 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4283 {
4284 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4285 enum nl80211_ps_state ps_state;
4286 struct wireless_dev *wdev;
4287 struct net_device *dev = info->user_ptr[1];
4288 struct sk_buff *msg;
4289 void *hdr;
4290 int err;
4291
4292 wdev = dev->ieee80211_ptr;
4293
4294 if (!rdev->ops->set_power_mgmt)
4295 return -EOPNOTSUPP;
4296
4297 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4298 if (!msg)
4299 return -ENOMEM;
4300
4301 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4302 NL80211_CMD_GET_POWER_SAVE);
4303 if (!hdr) {
4304 err = -ENOBUFS;
4305 goto free_msg;
4306 }
4307
4308 if (wdev->ps)
4309 ps_state = NL80211_PS_ENABLED;
4310 else
4311 ps_state = NL80211_PS_DISABLED;
4312
4313 NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4314
4315 genlmsg_end(msg, hdr);
4316 return genlmsg_reply(msg, info);
4317
4318 nla_put_failure:
4319 err = -ENOBUFS;
4320 free_msg:
4321 nlmsg_free(msg);
4322 return err;
4323 }
4324
4325 static struct nla_policy
4326 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4327 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4328 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4329 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4330 };
4331
4332 static int nl80211_set_cqm_rssi(struct genl_info *info,
4333 s32 threshold, u32 hysteresis)
4334 {
4335 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4336 struct wireless_dev *wdev;
4337 struct net_device *dev = info->user_ptr[1];
4338
4339 if (threshold > 0)
4340 return -EINVAL;
4341
4342 wdev = dev->ieee80211_ptr;
4343
4344 if (!rdev->ops->set_cqm_rssi_config)
4345 return -EOPNOTSUPP;
4346
4347 if (wdev->iftype != NL80211_IFTYPE_STATION &&
4348 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4349 return -EOPNOTSUPP;
4350
4351 return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4352 threshold, hysteresis);
4353 }
4354
4355 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4356 {
4357 struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4358 struct nlattr *cqm;
4359 int err;
4360
4361 cqm = info->attrs[NL80211_ATTR_CQM];
4362 if (!cqm) {
4363 err = -EINVAL;
4364 goto out;
4365 }
4366
4367 err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4368 nl80211_attr_cqm_policy);
4369 if (err)
4370 goto out;
4371
4372 if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4373 attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4374 s32 threshold;
4375 u32 hysteresis;
4376 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4377 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4378 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4379 } else
4380 err = -EINVAL;
4381
4382 out:
4383 return err;
4384 }
4385
4386 #define NL80211_FLAG_NEED_WIPHY 0x01
4387 #define NL80211_FLAG_NEED_NETDEV 0x02
4388 #define NL80211_FLAG_NEED_RTNL 0x04
4389 #define NL80211_FLAG_CHECK_NETDEV_UP 0x08
4390 #define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\
4391 NL80211_FLAG_CHECK_NETDEV_UP)
4392
4393 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
4394 struct genl_info *info)
4395 {
4396 struct cfg80211_registered_device *rdev;
4397 struct net_device *dev;
4398 int err;
4399 bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
4400
4401 if (rtnl)
4402 rtnl_lock();
4403
4404 if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
4405 rdev = cfg80211_get_dev_from_info(info);
4406 if (IS_ERR(rdev)) {
4407 if (rtnl)
4408 rtnl_unlock();
4409 return PTR_ERR(rdev);
4410 }
4411 info->user_ptr[0] = rdev;
4412 } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
4413 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4414 if (err) {
4415 if (rtnl)
4416 rtnl_unlock();
4417 return err;
4418 }
4419 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
4420 !netif_running(dev)) {
4421 cfg80211_unlock_rdev(rdev);
4422 dev_put(dev);
4423 if (rtnl)
4424 rtnl_unlock();
4425 return -ENETDOWN;
4426 }
4427 info->user_ptr[0] = rdev;
4428 info->user_ptr[1] = dev;
4429 }
4430
4431 return 0;
4432 }
4433
4434 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
4435 struct genl_info *info)
4436 {
4437 if (info->user_ptr[0])
4438 cfg80211_unlock_rdev(info->user_ptr[0]);
4439 if (info->user_ptr[1])
4440 dev_put(info->user_ptr[1]);
4441 if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
4442 rtnl_unlock();
4443 }
4444
4445 static struct genl_ops nl80211_ops[] = {
4446 {
4447 .cmd = NL80211_CMD_GET_WIPHY,
4448 .doit = nl80211_get_wiphy,
4449 .dumpit = nl80211_dump_wiphy,
4450 .policy = nl80211_policy,
4451 /* can be retrieved by unprivileged users */
4452 .internal_flags = NL80211_FLAG_NEED_WIPHY,
4453 },
4454 {
4455 .cmd = NL80211_CMD_SET_WIPHY,
4456 .doit = nl80211_set_wiphy,
4457 .policy = nl80211_policy,
4458 .flags = GENL_ADMIN_PERM,
4459 .internal_flags = NL80211_FLAG_NEED_RTNL,
4460 },
4461 {
4462 .cmd = NL80211_CMD_GET_INTERFACE,
4463 .doit = nl80211_get_interface,
4464 .dumpit = nl80211_dump_interface,
4465 .policy = nl80211_policy,
4466 /* can be retrieved by unprivileged users */
4467 .internal_flags = NL80211_FLAG_NEED_NETDEV,
4468 },
4469 {
4470 .cmd = NL80211_CMD_SET_INTERFACE,
4471 .doit = nl80211_set_interface,
4472 .policy = nl80211_policy,
4473 .flags = GENL_ADMIN_PERM,
4474 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4475 NL80211_FLAG_NEED_RTNL,
4476 },
4477 {
4478 .cmd = NL80211_CMD_NEW_INTERFACE,
4479 .doit = nl80211_new_interface,
4480 .policy = nl80211_policy,
4481 .flags = GENL_ADMIN_PERM,
4482 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4483 NL80211_FLAG_NEED_RTNL,
4484 },
4485 {
4486 .cmd = NL80211_CMD_DEL_INTERFACE,
4487 .doit = nl80211_del_interface,
4488 .policy = nl80211_policy,
4489 .flags = GENL_ADMIN_PERM,
4490 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4491 NL80211_FLAG_NEED_RTNL,
4492 },
4493 {
4494 .cmd = NL80211_CMD_GET_KEY,
4495 .doit = nl80211_get_key,
4496 .policy = nl80211_policy,
4497 .flags = GENL_ADMIN_PERM,
4498 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4499 NL80211_FLAG_NEED_RTNL,
4500 },
4501 {
4502 .cmd = NL80211_CMD_SET_KEY,
4503 .doit = nl80211_set_key,
4504 .policy = nl80211_policy,
4505 .flags = GENL_ADMIN_PERM,
4506 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4507 NL80211_FLAG_NEED_RTNL,
4508 },
4509 {
4510 .cmd = NL80211_CMD_NEW_KEY,
4511 .doit = nl80211_new_key,
4512 .policy = nl80211_policy,
4513 .flags = GENL_ADMIN_PERM,
4514 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4515 NL80211_FLAG_NEED_RTNL,
4516 },
4517 {
4518 .cmd = NL80211_CMD_DEL_KEY,
4519 .doit = nl80211_del_key,
4520 .policy = nl80211_policy,
4521 .flags = GENL_ADMIN_PERM,
4522 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4523 NL80211_FLAG_NEED_RTNL,
4524 },
4525 {
4526 .cmd = NL80211_CMD_SET_BEACON,
4527 .policy = nl80211_policy,
4528 .flags = GENL_ADMIN_PERM,
4529 .doit = nl80211_addset_beacon,
4530 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4531 NL80211_FLAG_NEED_RTNL,
4532 },
4533 {
4534 .cmd = NL80211_CMD_NEW_BEACON,
4535 .policy = nl80211_policy,
4536 .flags = GENL_ADMIN_PERM,
4537 .doit = nl80211_addset_beacon,
4538 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4539 NL80211_FLAG_NEED_RTNL,
4540 },
4541 {
4542 .cmd = NL80211_CMD_DEL_BEACON,
4543 .policy = nl80211_policy,
4544 .flags = GENL_ADMIN_PERM,
4545 .doit = nl80211_del_beacon,
4546 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4547 NL80211_FLAG_NEED_RTNL,
4548 },
4549 {
4550 .cmd = NL80211_CMD_GET_STATION,
4551 .doit = nl80211_get_station,
4552 .dumpit = nl80211_dump_station,
4553 .policy = nl80211_policy,
4554 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4555 NL80211_FLAG_NEED_RTNL,
4556 },
4557 {
4558 .cmd = NL80211_CMD_SET_STATION,
4559 .doit = nl80211_set_station,
4560 .policy = nl80211_policy,
4561 .flags = GENL_ADMIN_PERM,
4562 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4563 NL80211_FLAG_NEED_RTNL,
4564 },
4565 {
4566 .cmd = NL80211_CMD_NEW_STATION,
4567 .doit = nl80211_new_station,
4568 .policy = nl80211_policy,
4569 .flags = GENL_ADMIN_PERM,
4570 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4571 NL80211_FLAG_NEED_RTNL,
4572 },
4573 {
4574 .cmd = NL80211_CMD_DEL_STATION,
4575 .doit = nl80211_del_station,
4576 .policy = nl80211_policy,
4577 .flags = GENL_ADMIN_PERM,
4578 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4579 NL80211_FLAG_NEED_RTNL,
4580 },
4581 {
4582 .cmd = NL80211_CMD_GET_MPATH,
4583 .doit = nl80211_get_mpath,
4584 .dumpit = nl80211_dump_mpath,
4585 .policy = nl80211_policy,
4586 .flags = GENL_ADMIN_PERM,
4587 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4588 NL80211_FLAG_NEED_RTNL,
4589 },
4590 {
4591 .cmd = NL80211_CMD_SET_MPATH,
4592 .doit = nl80211_set_mpath,
4593 .policy = nl80211_policy,
4594 .flags = GENL_ADMIN_PERM,
4595 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4596 NL80211_FLAG_NEED_RTNL,
4597 },
4598 {
4599 .cmd = NL80211_CMD_NEW_MPATH,
4600 .doit = nl80211_new_mpath,
4601 .policy = nl80211_policy,
4602 .flags = GENL_ADMIN_PERM,
4603 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4604 NL80211_FLAG_NEED_RTNL,
4605 },
4606 {
4607 .cmd = NL80211_CMD_DEL_MPATH,
4608 .doit = nl80211_del_mpath,
4609 .policy = nl80211_policy,
4610 .flags = GENL_ADMIN_PERM,
4611 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4612 NL80211_FLAG_NEED_RTNL,
4613 },
4614 {
4615 .cmd = NL80211_CMD_SET_BSS,
4616 .doit = nl80211_set_bss,
4617 .policy = nl80211_policy,
4618 .flags = GENL_ADMIN_PERM,
4619 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4620 NL80211_FLAG_NEED_RTNL,
4621 },
4622 {
4623 .cmd = NL80211_CMD_GET_REG,
4624 .doit = nl80211_get_reg,
4625 .policy = nl80211_policy,
4626 /* can be retrieved by unprivileged users */
4627 },
4628 {
4629 .cmd = NL80211_CMD_SET_REG,
4630 .doit = nl80211_set_reg,
4631 .policy = nl80211_policy,
4632 .flags = GENL_ADMIN_PERM,
4633 },
4634 {
4635 .cmd = NL80211_CMD_REQ_SET_REG,
4636 .doit = nl80211_req_set_reg,
4637 .policy = nl80211_policy,
4638 .flags = GENL_ADMIN_PERM,
4639 },
4640 {
4641 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4642 .doit = nl80211_get_mesh_params,
4643 .policy = nl80211_policy,
4644 /* can be retrieved by unprivileged users */
4645 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4646 NL80211_FLAG_NEED_RTNL,
4647 },
4648 {
4649 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4650 .doit = nl80211_set_mesh_params,
4651 .policy = nl80211_policy,
4652 .flags = GENL_ADMIN_PERM,
4653 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4654 NL80211_FLAG_NEED_RTNL,
4655 },
4656 {
4657 .cmd = NL80211_CMD_TRIGGER_SCAN,
4658 .doit = nl80211_trigger_scan,
4659 .policy = nl80211_policy,
4660 .flags = GENL_ADMIN_PERM,
4661 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4662 NL80211_FLAG_NEED_RTNL,
4663 },
4664 {
4665 .cmd = NL80211_CMD_GET_SCAN,
4666 .policy = nl80211_policy,
4667 .dumpit = nl80211_dump_scan,
4668 },
4669 {
4670 .cmd = NL80211_CMD_AUTHENTICATE,
4671 .doit = nl80211_authenticate,
4672 .policy = nl80211_policy,
4673 .flags = GENL_ADMIN_PERM,
4674 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4675 NL80211_FLAG_NEED_RTNL,
4676 },
4677 {
4678 .cmd = NL80211_CMD_ASSOCIATE,
4679 .doit = nl80211_associate,
4680 .policy = nl80211_policy,
4681 .flags = GENL_ADMIN_PERM,
4682 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4683 NL80211_FLAG_NEED_RTNL,
4684 },
4685 {
4686 .cmd = NL80211_CMD_DEAUTHENTICATE,
4687 .doit = nl80211_deauthenticate,
4688 .policy = nl80211_policy,
4689 .flags = GENL_ADMIN_PERM,
4690 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4691 NL80211_FLAG_NEED_RTNL,
4692 },
4693 {
4694 .cmd = NL80211_CMD_DISASSOCIATE,
4695 .doit = nl80211_disassociate,
4696 .policy = nl80211_policy,
4697 .flags = GENL_ADMIN_PERM,
4698 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4699 NL80211_FLAG_NEED_RTNL,
4700 },
4701 {
4702 .cmd = NL80211_CMD_JOIN_IBSS,
4703 .doit = nl80211_join_ibss,
4704 .policy = nl80211_policy,
4705 .flags = GENL_ADMIN_PERM,
4706 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4707 NL80211_FLAG_NEED_RTNL,
4708 },
4709 {
4710 .cmd = NL80211_CMD_LEAVE_IBSS,
4711 .doit = nl80211_leave_ibss,
4712 .policy = nl80211_policy,
4713 .flags = GENL_ADMIN_PERM,
4714 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4715 NL80211_FLAG_NEED_RTNL,
4716 },
4717 #ifdef CONFIG_NL80211_TESTMODE
4718 {
4719 .cmd = NL80211_CMD_TESTMODE,
4720 .doit = nl80211_testmode_do,
4721 .policy = nl80211_policy,
4722 .flags = GENL_ADMIN_PERM,
4723 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4724 NL80211_FLAG_NEED_RTNL,
4725 },
4726 #endif
4727 {
4728 .cmd = NL80211_CMD_CONNECT,
4729 .doit = nl80211_connect,
4730 .policy = nl80211_policy,
4731 .flags = GENL_ADMIN_PERM,
4732 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4733 NL80211_FLAG_NEED_RTNL,
4734 },
4735 {
4736 .cmd = NL80211_CMD_DISCONNECT,
4737 .doit = nl80211_disconnect,
4738 .policy = nl80211_policy,
4739 .flags = GENL_ADMIN_PERM,
4740 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4741 NL80211_FLAG_NEED_RTNL,
4742 },
4743 {
4744 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
4745 .doit = nl80211_wiphy_netns,
4746 .policy = nl80211_policy,
4747 .flags = GENL_ADMIN_PERM,
4748 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4749 NL80211_FLAG_NEED_RTNL,
4750 },
4751 {
4752 .cmd = NL80211_CMD_GET_SURVEY,
4753 .policy = nl80211_policy,
4754 .dumpit = nl80211_dump_survey,
4755 },
4756 {
4757 .cmd = NL80211_CMD_SET_PMKSA,
4758 .doit = nl80211_setdel_pmksa,
4759 .policy = nl80211_policy,
4760 .flags = GENL_ADMIN_PERM,
4761 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4762 NL80211_FLAG_NEED_RTNL,
4763 },
4764 {
4765 .cmd = NL80211_CMD_DEL_PMKSA,
4766 .doit = nl80211_setdel_pmksa,
4767 .policy = nl80211_policy,
4768 .flags = GENL_ADMIN_PERM,
4769 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4770 NL80211_FLAG_NEED_RTNL,
4771 },
4772 {
4773 .cmd = NL80211_CMD_FLUSH_PMKSA,
4774 .doit = nl80211_flush_pmksa,
4775 .policy = nl80211_policy,
4776 .flags = GENL_ADMIN_PERM,
4777 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4778 NL80211_FLAG_NEED_RTNL,
4779 },
4780 {
4781 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
4782 .doit = nl80211_remain_on_channel,
4783 .policy = nl80211_policy,
4784 .flags = GENL_ADMIN_PERM,
4785 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4786 NL80211_FLAG_NEED_RTNL,
4787 },
4788 {
4789 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
4790 .doit = nl80211_cancel_remain_on_channel,
4791 .policy = nl80211_policy,
4792 .flags = GENL_ADMIN_PERM,
4793 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4794 NL80211_FLAG_NEED_RTNL,
4795 },
4796 {
4797 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
4798 .doit = nl80211_set_tx_bitrate_mask,
4799 .policy = nl80211_policy,
4800 .flags = GENL_ADMIN_PERM,
4801 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4802 NL80211_FLAG_NEED_RTNL,
4803 },
4804 {
4805 .cmd = NL80211_CMD_REGISTER_FRAME,
4806 .doit = nl80211_register_mgmt,
4807 .policy = nl80211_policy,
4808 .flags = GENL_ADMIN_PERM,
4809 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4810 NL80211_FLAG_NEED_RTNL,
4811 },
4812 {
4813 .cmd = NL80211_CMD_FRAME,
4814 .doit = nl80211_tx_mgmt,
4815 .policy = nl80211_policy,
4816 .flags = GENL_ADMIN_PERM,
4817 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4818 NL80211_FLAG_NEED_RTNL,
4819 },
4820 {
4821 .cmd = NL80211_CMD_SET_POWER_SAVE,
4822 .doit = nl80211_set_power_save,
4823 .policy = nl80211_policy,
4824 .flags = GENL_ADMIN_PERM,
4825 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4826 NL80211_FLAG_NEED_RTNL,
4827 },
4828 {
4829 .cmd = NL80211_CMD_GET_POWER_SAVE,
4830 .doit = nl80211_get_power_save,
4831 .policy = nl80211_policy,
4832 /* can be retrieved by unprivileged users */
4833 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4834 NL80211_FLAG_NEED_RTNL,
4835 },
4836 {
4837 .cmd = NL80211_CMD_SET_CQM,
4838 .doit = nl80211_set_cqm,
4839 .policy = nl80211_policy,
4840 .flags = GENL_ADMIN_PERM,
4841 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4842 NL80211_FLAG_NEED_RTNL,
4843 },
4844 {
4845 .cmd = NL80211_CMD_SET_CHANNEL,
4846 .doit = nl80211_set_channel,
4847 .policy = nl80211_policy,
4848 .flags = GENL_ADMIN_PERM,
4849 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4850 NL80211_FLAG_NEED_RTNL,
4851 },
4852 {
4853 .cmd = NL80211_CMD_SET_WDS_PEER,
4854 .doit = nl80211_set_wds_peer,
4855 .policy = nl80211_policy,
4856 .flags = GENL_ADMIN_PERM,
4857 },
4858 };
4859
4860 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4861 .name = "mlme",
4862 };
4863
4864 /* multicast groups */
4865 static struct genl_multicast_group nl80211_config_mcgrp = {
4866 .name = "config",
4867 };
4868 static struct genl_multicast_group nl80211_scan_mcgrp = {
4869 .name = "scan",
4870 };
4871 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4872 .name = "regulatory",
4873 };
4874
4875 /* notification functions */
4876
4877 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4878 {
4879 struct sk_buff *msg;
4880
4881 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4882 if (!msg)
4883 return;
4884
4885 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4886 nlmsg_free(msg);
4887 return;
4888 }
4889
4890 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4891 nl80211_config_mcgrp.id, GFP_KERNEL);
4892 }
4893
4894 static int nl80211_add_scan_req(struct sk_buff *msg,
4895 struct cfg80211_registered_device *rdev)
4896 {
4897 struct cfg80211_scan_request *req = rdev->scan_req;
4898 struct nlattr *nest;
4899 int i;
4900
4901 ASSERT_RDEV_LOCK(rdev);
4902
4903 if (WARN_ON(!req))
4904 return 0;
4905
4906 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
4907 if (!nest)
4908 goto nla_put_failure;
4909 for (i = 0; i < req->n_ssids; i++)
4910 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
4911 nla_nest_end(msg, nest);
4912
4913 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
4914 if (!nest)
4915 goto nla_put_failure;
4916 for (i = 0; i < req->n_channels; i++)
4917 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
4918 nla_nest_end(msg, nest);
4919
4920 if (req->ie)
4921 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
4922
4923 return 0;
4924 nla_put_failure:
4925 return -ENOBUFS;
4926 }
4927
4928 static int nl80211_send_scan_msg(struct sk_buff *msg,
4929 struct cfg80211_registered_device *rdev,
4930 struct net_device *netdev,
4931 u32 pid, u32 seq, int flags,
4932 u32 cmd)
4933 {
4934 void *hdr;
4935
4936 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
4937 if (!hdr)
4938 return -1;
4939
4940 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4941 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4942
4943 /* ignore errors and send incomplete event anyway */
4944 nl80211_add_scan_req(msg, rdev);
4945
4946 return genlmsg_end(msg, hdr);
4947
4948 nla_put_failure:
4949 genlmsg_cancel(msg, hdr);
4950 return -EMSGSIZE;
4951 }
4952
4953 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
4954 struct net_device *netdev)
4955 {
4956 struct sk_buff *msg;
4957
4958 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4959 if (!msg)
4960 return;
4961
4962 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4963 NL80211_CMD_TRIGGER_SCAN) < 0) {
4964 nlmsg_free(msg);
4965 return;
4966 }
4967
4968 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4969 nl80211_scan_mcgrp.id, GFP_KERNEL);
4970 }
4971
4972 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
4973 struct net_device *netdev)
4974 {
4975 struct sk_buff *msg;
4976
4977 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4978 if (!msg)
4979 return;
4980
4981 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4982 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4983 nlmsg_free(msg);
4984 return;
4985 }
4986
4987 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4988 nl80211_scan_mcgrp.id, GFP_KERNEL);
4989 }
4990
4991 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
4992 struct net_device *netdev)
4993 {
4994 struct sk_buff *msg;
4995
4996 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4997 if (!msg)
4998 return;
4999
5000 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5001 NL80211_CMD_SCAN_ABORTED) < 0) {
5002 nlmsg_free(msg);
5003 return;
5004 }
5005
5006 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5007 nl80211_scan_mcgrp.id, GFP_KERNEL);
5008 }
5009
5010 /*
5011 * This can happen on global regulatory changes or device specific settings
5012 * based on custom world regulatory domains.
5013 */
5014 void nl80211_send_reg_change_event(struct regulatory_request *request)
5015 {
5016 struct sk_buff *msg;
5017 void *hdr;
5018
5019 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5020 if (!msg)
5021 return;
5022
5023 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5024 if (!hdr) {
5025 nlmsg_free(msg);
5026 return;
5027 }
5028
5029 /* Userspace can always count this one always being set */
5030 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5031
5032 if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5033 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5034 NL80211_REGDOM_TYPE_WORLD);
5035 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5036 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5037 NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5038 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5039 request->intersect)
5040 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5041 NL80211_REGDOM_TYPE_INTERSECTION);
5042 else {
5043 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5044 NL80211_REGDOM_TYPE_COUNTRY);
5045 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5046 }
5047
5048 if (wiphy_idx_valid(request->wiphy_idx))
5049 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5050
5051 if (genlmsg_end(msg, hdr) < 0) {
5052 nlmsg_free(msg);
5053 return;
5054 }
5055
5056 rcu_read_lock();
5057 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5058 GFP_ATOMIC);
5059 rcu_read_unlock();
5060
5061 return;
5062
5063 nla_put_failure:
5064 genlmsg_cancel(msg, hdr);
5065 nlmsg_free(msg);
5066 }
5067
5068 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5069 struct net_device *netdev,
5070 const u8 *buf, size_t len,
5071 enum nl80211_commands cmd, gfp_t gfp)
5072 {
5073 struct sk_buff *msg;
5074 void *hdr;
5075
5076 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5077 if (!msg)
5078 return;
5079
5080 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5081 if (!hdr) {
5082 nlmsg_free(msg);
5083 return;
5084 }
5085
5086 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5087 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5088 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5089
5090 if (genlmsg_end(msg, hdr) < 0) {
5091 nlmsg_free(msg);
5092 return;
5093 }
5094
5095 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5096 nl80211_mlme_mcgrp.id, gfp);
5097 return;
5098
5099 nla_put_failure:
5100 genlmsg_cancel(msg, hdr);
5101 nlmsg_free(msg);
5102 }
5103
5104 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5105 struct net_device *netdev, const u8 *buf,
5106 size_t len, gfp_t gfp)
5107 {
5108 nl80211_send_mlme_event(rdev, netdev, buf, len,
5109 NL80211_CMD_AUTHENTICATE, gfp);
5110 }
5111
5112 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5113 struct net_device *netdev, const u8 *buf,
5114 size_t len, gfp_t gfp)
5115 {
5116 nl80211_send_mlme_event(rdev, netdev, buf, len,
5117 NL80211_CMD_ASSOCIATE, gfp);
5118 }
5119
5120 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5121 struct net_device *netdev, const u8 *buf,
5122 size_t len, gfp_t gfp)
5123 {
5124 nl80211_send_mlme_event(rdev, netdev, buf, len,
5125 NL80211_CMD_DEAUTHENTICATE, gfp);
5126 }
5127
5128 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5129 struct net_device *netdev, const u8 *buf,
5130 size_t len, gfp_t gfp)
5131 {
5132 nl80211_send_mlme_event(rdev, netdev, buf, len,
5133 NL80211_CMD_DISASSOCIATE, gfp);
5134 }
5135
5136 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5137 struct net_device *netdev, int cmd,
5138 const u8 *addr, gfp_t gfp)
5139 {
5140 struct sk_buff *msg;
5141 void *hdr;
5142
5143 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5144 if (!msg)
5145 return;
5146
5147 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5148 if (!hdr) {
5149 nlmsg_free(msg);
5150 return;
5151 }
5152
5153 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5154 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5155 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5156 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5157
5158 if (genlmsg_end(msg, hdr) < 0) {
5159 nlmsg_free(msg);
5160 return;
5161 }
5162
5163 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5164 nl80211_mlme_mcgrp.id, gfp);
5165 return;
5166
5167 nla_put_failure:
5168 genlmsg_cancel(msg, hdr);
5169 nlmsg_free(msg);
5170 }
5171
5172 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5173 struct net_device *netdev, const u8 *addr,
5174 gfp_t gfp)
5175 {
5176 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5177 addr, gfp);
5178 }
5179
5180 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5181 struct net_device *netdev, const u8 *addr,
5182 gfp_t gfp)
5183 {
5184 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5185 addr, gfp);
5186 }
5187
5188 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5189 struct net_device *netdev, const u8 *bssid,
5190 const u8 *req_ie, size_t req_ie_len,
5191 const u8 *resp_ie, size_t resp_ie_len,
5192 u16 status, gfp_t gfp)
5193 {
5194 struct sk_buff *msg;
5195 void *hdr;
5196
5197 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5198 if (!msg)
5199 return;
5200
5201 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5202 if (!hdr) {
5203 nlmsg_free(msg);
5204 return;
5205 }
5206
5207 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5208 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5209 if (bssid)
5210 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5211 NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5212 if (req_ie)
5213 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5214 if (resp_ie)
5215 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5216
5217 if (genlmsg_end(msg, hdr) < 0) {
5218 nlmsg_free(msg);
5219 return;
5220 }
5221
5222 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5223 nl80211_mlme_mcgrp.id, gfp);
5224 return;
5225
5226 nla_put_failure:
5227 genlmsg_cancel(msg, hdr);
5228 nlmsg_free(msg);
5229
5230 }
5231
5232 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5233 struct net_device *netdev, const u8 *bssid,
5234 const u8 *req_ie, size_t req_ie_len,
5235 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5236 {
5237 struct sk_buff *msg;
5238 void *hdr;
5239
5240 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5241 if (!msg)
5242 return;
5243
5244 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5245 if (!hdr) {
5246 nlmsg_free(msg);
5247 return;
5248 }
5249
5250 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5251 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5252 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5253 if (req_ie)
5254 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5255 if (resp_ie)
5256 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5257
5258 if (genlmsg_end(msg, hdr) < 0) {
5259 nlmsg_free(msg);
5260 return;
5261 }
5262
5263 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5264 nl80211_mlme_mcgrp.id, gfp);
5265 return;
5266
5267 nla_put_failure:
5268 genlmsg_cancel(msg, hdr);
5269 nlmsg_free(msg);
5270
5271 }
5272
5273 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5274 struct net_device *netdev, u16 reason,
5275 const u8 *ie, size_t ie_len, bool from_ap)
5276 {
5277 struct sk_buff *msg;
5278 void *hdr;
5279
5280 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5281 if (!msg)
5282 return;
5283
5284 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5285 if (!hdr) {
5286 nlmsg_free(msg);
5287 return;
5288 }
5289
5290 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5291 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5292 if (from_ap && reason)
5293 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5294 if (from_ap)
5295 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5296 if (ie)
5297 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5298
5299 if (genlmsg_end(msg, hdr) < 0) {
5300 nlmsg_free(msg);
5301 return;
5302 }
5303
5304 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5305 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5306 return;
5307
5308 nla_put_failure:
5309 genlmsg_cancel(msg, hdr);
5310 nlmsg_free(msg);
5311
5312 }
5313
5314 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5315 struct net_device *netdev, const u8 *bssid,
5316 gfp_t gfp)
5317 {
5318 struct sk_buff *msg;
5319 void *hdr;
5320
5321 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5322 if (!msg)
5323 return;
5324
5325 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5326 if (!hdr) {
5327 nlmsg_free(msg);
5328 return;
5329 }
5330
5331 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5332 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5333 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5334
5335 if (genlmsg_end(msg, hdr) < 0) {
5336 nlmsg_free(msg);
5337 return;
5338 }
5339
5340 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5341 nl80211_mlme_mcgrp.id, gfp);
5342 return;
5343
5344 nla_put_failure:
5345 genlmsg_cancel(msg, hdr);
5346 nlmsg_free(msg);
5347 }
5348
5349 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5350 struct net_device *netdev, const u8 *addr,
5351 enum nl80211_key_type key_type, int key_id,
5352 const u8 *tsc, gfp_t gfp)
5353 {
5354 struct sk_buff *msg;
5355 void *hdr;
5356
5357 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5358 if (!msg)
5359 return;
5360
5361 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5362 if (!hdr) {
5363 nlmsg_free(msg);
5364 return;
5365 }
5366
5367 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5368 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5369 if (addr)
5370 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5371 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5372 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5373 if (tsc)
5374 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5375
5376 if (genlmsg_end(msg, hdr) < 0) {
5377 nlmsg_free(msg);
5378 return;
5379 }
5380
5381 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5382 nl80211_mlme_mcgrp.id, gfp);
5383 return;
5384
5385 nla_put_failure:
5386 genlmsg_cancel(msg, hdr);
5387 nlmsg_free(msg);
5388 }
5389
5390 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5391 struct ieee80211_channel *channel_before,
5392 struct ieee80211_channel *channel_after)
5393 {
5394 struct sk_buff *msg;
5395 void *hdr;
5396 struct nlattr *nl_freq;
5397
5398 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5399 if (!msg)
5400 return;
5401
5402 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5403 if (!hdr) {
5404 nlmsg_free(msg);
5405 return;
5406 }
5407
5408 /*
5409 * Since we are applying the beacon hint to a wiphy we know its
5410 * wiphy_idx is valid
5411 */
5412 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5413
5414 /* Before */
5415 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5416 if (!nl_freq)
5417 goto nla_put_failure;
5418 if (nl80211_msg_put_channel(msg, channel_before))
5419 goto nla_put_failure;
5420 nla_nest_end(msg, nl_freq);
5421
5422 /* After */
5423 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5424 if (!nl_freq)
5425 goto nla_put_failure;
5426 if (nl80211_msg_put_channel(msg, channel_after))
5427 goto nla_put_failure;
5428 nla_nest_end(msg, nl_freq);
5429
5430 if (genlmsg_end(msg, hdr) < 0) {
5431 nlmsg_free(msg);
5432 return;
5433 }
5434
5435 rcu_read_lock();
5436 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5437 GFP_ATOMIC);
5438 rcu_read_unlock();
5439
5440 return;
5441
5442 nla_put_failure:
5443 genlmsg_cancel(msg, hdr);
5444 nlmsg_free(msg);
5445 }
5446
5447 static void nl80211_send_remain_on_chan_event(
5448 int cmd, struct cfg80211_registered_device *rdev,
5449 struct net_device *netdev, u64 cookie,
5450 struct ieee80211_channel *chan,
5451 enum nl80211_channel_type channel_type,
5452 unsigned int duration, gfp_t gfp)
5453 {
5454 struct sk_buff *msg;
5455 void *hdr;
5456
5457 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5458 if (!msg)
5459 return;
5460
5461 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5462 if (!hdr) {
5463 nlmsg_free(msg);
5464 return;
5465 }
5466
5467 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5468 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5469 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5470 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5471 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5472
5473 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5474 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5475
5476 if (genlmsg_end(msg, hdr) < 0) {
5477 nlmsg_free(msg);
5478 return;
5479 }
5480
5481 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5482 nl80211_mlme_mcgrp.id, gfp);
5483 return;
5484
5485 nla_put_failure:
5486 genlmsg_cancel(msg, hdr);
5487 nlmsg_free(msg);
5488 }
5489
5490 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5491 struct net_device *netdev, u64 cookie,
5492 struct ieee80211_channel *chan,
5493 enum nl80211_channel_type channel_type,
5494 unsigned int duration, gfp_t gfp)
5495 {
5496 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5497 rdev, netdev, cookie, chan,
5498 channel_type, duration, gfp);
5499 }
5500
5501 void nl80211_send_remain_on_channel_cancel(
5502 struct cfg80211_registered_device *rdev, struct net_device *netdev,
5503 u64 cookie, struct ieee80211_channel *chan,
5504 enum nl80211_channel_type channel_type, gfp_t gfp)
5505 {
5506 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5507 rdev, netdev, cookie, chan,
5508 channel_type, 0, gfp);
5509 }
5510
5511 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5512 struct net_device *dev, const u8 *mac_addr,
5513 struct station_info *sinfo, gfp_t gfp)
5514 {
5515 struct sk_buff *msg;
5516
5517 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5518 if (!msg)
5519 return;
5520
5521 if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5522 nlmsg_free(msg);
5523 return;
5524 }
5525
5526 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5527 nl80211_mlme_mcgrp.id, gfp);
5528 }
5529
5530 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
5531 struct net_device *netdev, u32 nlpid,
5532 int freq, const u8 *buf, size_t len, gfp_t gfp)
5533 {
5534 struct sk_buff *msg;
5535 void *hdr;
5536 int err;
5537
5538 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5539 if (!msg)
5540 return -ENOMEM;
5541
5542 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
5543 if (!hdr) {
5544 nlmsg_free(msg);
5545 return -ENOMEM;
5546 }
5547
5548 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5549 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5550 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5551 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5552
5553 err = genlmsg_end(msg, hdr);
5554 if (err < 0) {
5555 nlmsg_free(msg);
5556 return err;
5557 }
5558
5559 err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5560 if (err < 0)
5561 return err;
5562 return 0;
5563
5564 nla_put_failure:
5565 genlmsg_cancel(msg, hdr);
5566 nlmsg_free(msg);
5567 return -ENOBUFS;
5568 }
5569
5570 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
5571 struct net_device *netdev, u64 cookie,
5572 const u8 *buf, size_t len, bool ack,
5573 gfp_t gfp)
5574 {
5575 struct sk_buff *msg;
5576 void *hdr;
5577
5578 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5579 if (!msg)
5580 return;
5581
5582 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
5583 if (!hdr) {
5584 nlmsg_free(msg);
5585 return;
5586 }
5587
5588 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5589 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5590 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5591 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5592 if (ack)
5593 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
5594
5595 if (genlmsg_end(msg, hdr) < 0) {
5596 nlmsg_free(msg);
5597 return;
5598 }
5599
5600 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
5601 return;
5602
5603 nla_put_failure:
5604 genlmsg_cancel(msg, hdr);
5605 nlmsg_free(msg);
5606 }
5607
5608 void
5609 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
5610 struct net_device *netdev,
5611 enum nl80211_cqm_rssi_threshold_event rssi_event,
5612 gfp_t gfp)
5613 {
5614 struct sk_buff *msg;
5615 struct nlattr *pinfoattr;
5616 void *hdr;
5617
5618 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5619 if (!msg)
5620 return;
5621
5622 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
5623 if (!hdr) {
5624 nlmsg_free(msg);
5625 return;
5626 }
5627
5628 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5629 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5630
5631 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
5632 if (!pinfoattr)
5633 goto nla_put_failure;
5634
5635 NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
5636 rssi_event);
5637
5638 nla_nest_end(msg, pinfoattr);
5639
5640 if (genlmsg_end(msg, hdr) < 0) {
5641 nlmsg_free(msg);
5642 return;
5643 }
5644
5645 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5646 nl80211_mlme_mcgrp.id, gfp);
5647 return;
5648
5649 nla_put_failure:
5650 genlmsg_cancel(msg, hdr);
5651 nlmsg_free(msg);
5652 }
5653
5654 static int nl80211_netlink_notify(struct notifier_block * nb,
5655 unsigned long state,
5656 void *_notify)
5657 {
5658 struct netlink_notify *notify = _notify;
5659 struct cfg80211_registered_device *rdev;
5660 struct wireless_dev *wdev;
5661
5662 if (state != NETLINK_URELEASE)
5663 return NOTIFY_DONE;
5664
5665 rcu_read_lock();
5666
5667 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
5668 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
5669 cfg80211_mlme_unregister_socket(wdev, notify->pid);
5670
5671 rcu_read_unlock();
5672
5673 return NOTIFY_DONE;
5674 }
5675
5676 static struct notifier_block nl80211_netlink_notifier = {
5677 .notifier_call = nl80211_netlink_notify,
5678 };
5679
5680 /* initialisation/exit functions */
5681
5682 int nl80211_init(void)
5683 {
5684 int err;
5685
5686 err = genl_register_family_with_ops(&nl80211_fam,
5687 nl80211_ops, ARRAY_SIZE(nl80211_ops));
5688 if (err)
5689 return err;
5690
5691 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
5692 if (err)
5693 goto err_out;
5694
5695 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
5696 if (err)
5697 goto err_out;
5698
5699 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
5700 if (err)
5701 goto err_out;
5702
5703 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
5704 if (err)
5705 goto err_out;
5706
5707 #ifdef CONFIG_NL80211_TESTMODE
5708 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
5709 if (err)
5710 goto err_out;
5711 #endif
5712
5713 err = netlink_register_notifier(&nl80211_netlink_notifier);
5714 if (err)
5715 goto err_out;
5716
5717 return 0;
5718 err_out:
5719 genl_unregister_family(&nl80211_fam);
5720 return err;
5721 }
5722
5723 void nl80211_exit(void)
5724 {
5725 netlink_unregister_notifier(&nl80211_netlink_notifier);
5726 genl_unregister_family(&nl80211_fam);
5727 }
Linus' kernel tree