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cfg80211/mac80211: better channel handling
[mirror_ubuntu-jammy-kernel.git] / net / wireless / nl80211.c
1 /*
2 * This is the new netlink-based wireless configuration interface.
3 *
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 */
6
7 #include <linux/if.h>
8 #include <linux/module.h>
9 #include <linux/err.h>
10 #include <linux/list.h>
11 #include <linux/if_ether.h>
12 #include <linux/ieee80211.h>
13 #include <linux/nl80211.h>
14 #include <linux/rtnetlink.h>
15 #include <linux/netlink.h>
16 #include <linux/etherdevice.h>
17 #include <net/net_namespace.h>
18 #include <net/genetlink.h>
19 #include <net/cfg80211.h>
20 #include <net/sock.h>
21 #include "core.h"
22 #include "nl80211.h"
23 #include "reg.h"
24
25 /* the netlink family */
26 static struct genl_family nl80211_fam = {
27 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
28 .name = "nl80211", /* have users key off the name instead */
29 .hdrsize = 0, /* no private header */
30 .version = 1, /* no particular meaning now */
31 .maxattr = NL80211_ATTR_MAX,
32 .netnsok = true,
33 };
34
35 /* internal helper: get rdev and dev */
36 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
37 struct cfg80211_registered_device **rdev,
38 struct net_device **dev)
39 {
40 struct nlattr **attrs = info->attrs;
41 int ifindex;
42
43 if (!attrs[NL80211_ATTR_IFINDEX])
44 return -EINVAL;
45
46 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
47 *dev = dev_get_by_index(genl_info_net(info), ifindex);
48 if (!*dev)
49 return -ENODEV;
50
51 *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
52 if (IS_ERR(*rdev)) {
53 dev_put(*dev);
54 return PTR_ERR(*rdev);
55 }
56
57 return 0;
58 }
59
60 /* policy for the attributes */
61 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
62 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
63 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
64 .len = 20-1 },
65 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
66 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
67 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
68 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
69 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
70 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
71 [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
72 [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
73
74 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
75 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
76 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
77
78 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
79 [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
80
81 [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
82 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
83 .len = WLAN_MAX_KEY_LEN },
84 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
85 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
86 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
87 [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
88
89 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
90 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
91 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
92 .len = IEEE80211_MAX_DATA_LEN },
93 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
94 .len = IEEE80211_MAX_DATA_LEN },
95 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
96 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
97 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
98 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
99 .len = NL80211_MAX_SUPP_RATES },
100 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
101 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
102 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
103 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
104 .len = IEEE80211_MAX_MESH_ID_LEN },
105 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
106
107 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
108 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
109
110 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
111 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
112 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
113 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
114 .len = NL80211_MAX_SUPP_RATES },
115
116 [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
117
118 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
119 .len = NL80211_HT_CAPABILITY_LEN },
120
121 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
122 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
123 .len = IEEE80211_MAX_DATA_LEN },
124 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
125 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
126
127 [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
128 .len = IEEE80211_MAX_SSID_LEN },
129 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
130 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
131 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
132 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
133 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
134 [NL80211_ATTR_STA_FLAGS2] = {
135 .len = sizeof(struct nl80211_sta_flag_update),
136 },
137 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
138 [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
139 [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
140 [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
141 [NL80211_ATTR_PID] = { .type = NLA_U32 },
142 [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
143 [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
144 .len = WLAN_PMKID_LEN },
145 [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
146 [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
147 [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
148 [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
149 .len = IEEE80211_MAX_DATA_LEN },
150 [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
151 [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
152 [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
153 [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
154 [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
155 };
156
157 /* policy for the attributes */
158 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
159 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
160 [NL80211_KEY_IDX] = { .type = NLA_U8 },
161 [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
162 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
163 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
164 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
165 };
166
167 /* ifidx get helper */
168 static int nl80211_get_ifidx(struct netlink_callback *cb)
169 {
170 int res;
171
172 res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
173 nl80211_fam.attrbuf, nl80211_fam.maxattr,
174 nl80211_policy);
175 if (res)
176 return res;
177
178 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
179 return -EINVAL;
180
181 res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
182 if (!res)
183 return -EINVAL;
184 return res;
185 }
186
187 /* IE validation */
188 static bool is_valid_ie_attr(const struct nlattr *attr)
189 {
190 const u8 *pos;
191 int len;
192
193 if (!attr)
194 return true;
195
196 pos = nla_data(attr);
197 len = nla_len(attr);
198
199 while (len) {
200 u8 elemlen;
201
202 if (len < 2)
203 return false;
204 len -= 2;
205
206 elemlen = pos[1];
207 if (elemlen > len)
208 return false;
209
210 len -= elemlen;
211 pos += 2 + elemlen;
212 }
213
214 return true;
215 }
216
217 /* message building helper */
218 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
219 int flags, u8 cmd)
220 {
221 /* since there is no private header just add the generic one */
222 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
223 }
224
225 static int nl80211_msg_put_channel(struct sk_buff *msg,
226 struct ieee80211_channel *chan)
227 {
228 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
229 chan->center_freq);
230
231 if (chan->flags & IEEE80211_CHAN_DISABLED)
232 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
233 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
234 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
235 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
236 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
237 if (chan->flags & IEEE80211_CHAN_RADAR)
238 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
239
240 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
241 DBM_TO_MBM(chan->max_power));
242
243 return 0;
244
245 nla_put_failure:
246 return -ENOBUFS;
247 }
248
249 /* netlink command implementations */
250
251 struct key_parse {
252 struct key_params p;
253 int idx;
254 bool def, defmgmt;
255 };
256
257 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
258 {
259 struct nlattr *tb[NL80211_KEY_MAX + 1];
260 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
261 nl80211_key_policy);
262 if (err)
263 return err;
264
265 k->def = !!tb[NL80211_KEY_DEFAULT];
266 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
267
268 if (tb[NL80211_KEY_IDX])
269 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
270
271 if (tb[NL80211_KEY_DATA]) {
272 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
273 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
274 }
275
276 if (tb[NL80211_KEY_SEQ]) {
277 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
278 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
279 }
280
281 if (tb[NL80211_KEY_CIPHER])
282 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
283
284 return 0;
285 }
286
287 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
288 {
289 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
290 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
291 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
292 }
293
294 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
295 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
296 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
297 }
298
299 if (info->attrs[NL80211_ATTR_KEY_IDX])
300 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
301
302 if (info->attrs[NL80211_ATTR_KEY_CIPHER])
303 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
304
305 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
306 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
307
308 return 0;
309 }
310
311 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
312 {
313 int err;
314
315 memset(k, 0, sizeof(*k));
316 k->idx = -1;
317
318 if (info->attrs[NL80211_ATTR_KEY])
319 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
320 else
321 err = nl80211_parse_key_old(info, k);
322
323 if (err)
324 return err;
325
326 if (k->def && k->defmgmt)
327 return -EINVAL;
328
329 if (k->idx != -1) {
330 if (k->defmgmt) {
331 if (k->idx < 4 || k->idx > 5)
332 return -EINVAL;
333 } else if (k->def) {
334 if (k->idx < 0 || k->idx > 3)
335 return -EINVAL;
336 } else {
337 if (k->idx < 0 || k->idx > 5)
338 return -EINVAL;
339 }
340 }
341
342 return 0;
343 }
344
345 static struct cfg80211_cached_keys *
346 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
347 struct nlattr *keys)
348 {
349 struct key_parse parse;
350 struct nlattr *key;
351 struct cfg80211_cached_keys *result;
352 int rem, err, def = 0;
353
354 result = kzalloc(sizeof(*result), GFP_KERNEL);
355 if (!result)
356 return ERR_PTR(-ENOMEM);
357
358 result->def = -1;
359 result->defmgmt = -1;
360
361 nla_for_each_nested(key, keys, rem) {
362 memset(&parse, 0, sizeof(parse));
363 parse.idx = -1;
364
365 err = nl80211_parse_key_new(key, &parse);
366 if (err)
367 goto error;
368 err = -EINVAL;
369 if (!parse.p.key)
370 goto error;
371 if (parse.idx < 0 || parse.idx > 4)
372 goto error;
373 if (parse.def) {
374 if (def)
375 goto error;
376 def = 1;
377 result->def = parse.idx;
378 } else if (parse.defmgmt)
379 goto error;
380 err = cfg80211_validate_key_settings(rdev, &parse.p,
381 parse.idx, NULL);
382 if (err)
383 goto error;
384 result->params[parse.idx].cipher = parse.p.cipher;
385 result->params[parse.idx].key_len = parse.p.key_len;
386 result->params[parse.idx].key = result->data[parse.idx];
387 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
388 }
389
390 return result;
391 error:
392 kfree(result);
393 return ERR_PTR(err);
394 }
395
396 static int nl80211_key_allowed(struct wireless_dev *wdev)
397 {
398 ASSERT_WDEV_LOCK(wdev);
399
400 if (!netif_running(wdev->netdev))
401 return -ENETDOWN;
402
403 switch (wdev->iftype) {
404 case NL80211_IFTYPE_AP:
405 case NL80211_IFTYPE_AP_VLAN:
406 break;
407 case NL80211_IFTYPE_ADHOC:
408 if (!wdev->current_bss)
409 return -ENOLINK;
410 break;
411 case NL80211_IFTYPE_STATION:
412 if (wdev->sme_state != CFG80211_SME_CONNECTED)
413 return -ENOLINK;
414 break;
415 default:
416 return -EINVAL;
417 }
418
419 return 0;
420 }
421
422 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
423 struct cfg80211_registered_device *dev)
424 {
425 void *hdr;
426 struct nlattr *nl_bands, *nl_band;
427 struct nlattr *nl_freqs, *nl_freq;
428 struct nlattr *nl_rates, *nl_rate;
429 struct nlattr *nl_modes;
430 struct nlattr *nl_cmds;
431 enum ieee80211_band band;
432 struct ieee80211_channel *chan;
433 struct ieee80211_rate *rate;
434 int i;
435 u16 ifmodes = dev->wiphy.interface_modes;
436
437 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
438 if (!hdr)
439 return -1;
440
441 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
442 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
443
444 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
445 cfg80211_rdev_list_generation);
446
447 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
448 dev->wiphy.retry_short);
449 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
450 dev->wiphy.retry_long);
451 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
452 dev->wiphy.frag_threshold);
453 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
454 dev->wiphy.rts_threshold);
455 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
456 dev->wiphy.coverage_class);
457
458 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
459 dev->wiphy.max_scan_ssids);
460 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
461 dev->wiphy.max_scan_ie_len);
462
463 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
464 sizeof(u32) * dev->wiphy.n_cipher_suites,
465 dev->wiphy.cipher_suites);
466
467 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
468 dev->wiphy.max_num_pmkids);
469
470 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
471 if (!nl_modes)
472 goto nla_put_failure;
473
474 i = 0;
475 while (ifmodes) {
476 if (ifmodes & 1)
477 NLA_PUT_FLAG(msg, i);
478 ifmodes >>= 1;
479 i++;
480 }
481
482 nla_nest_end(msg, nl_modes);
483
484 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
485 if (!nl_bands)
486 goto nla_put_failure;
487
488 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
489 if (!dev->wiphy.bands[band])
490 continue;
491
492 nl_band = nla_nest_start(msg, band);
493 if (!nl_band)
494 goto nla_put_failure;
495
496 /* add HT info */
497 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
498 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
499 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
500 &dev->wiphy.bands[band]->ht_cap.mcs);
501 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
502 dev->wiphy.bands[band]->ht_cap.cap);
503 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
504 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
505 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
506 dev->wiphy.bands[band]->ht_cap.ampdu_density);
507 }
508
509 /* add frequencies */
510 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
511 if (!nl_freqs)
512 goto nla_put_failure;
513
514 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
515 nl_freq = nla_nest_start(msg, i);
516 if (!nl_freq)
517 goto nla_put_failure;
518
519 chan = &dev->wiphy.bands[band]->channels[i];
520
521 if (nl80211_msg_put_channel(msg, chan))
522 goto nla_put_failure;
523
524 nla_nest_end(msg, nl_freq);
525 }
526
527 nla_nest_end(msg, nl_freqs);
528
529 /* add bitrates */
530 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
531 if (!nl_rates)
532 goto nla_put_failure;
533
534 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
535 nl_rate = nla_nest_start(msg, i);
536 if (!nl_rate)
537 goto nla_put_failure;
538
539 rate = &dev->wiphy.bands[band]->bitrates[i];
540 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
541 rate->bitrate);
542 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
543 NLA_PUT_FLAG(msg,
544 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
545
546 nla_nest_end(msg, nl_rate);
547 }
548
549 nla_nest_end(msg, nl_rates);
550
551 nla_nest_end(msg, nl_band);
552 }
553 nla_nest_end(msg, nl_bands);
554
555 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
556 if (!nl_cmds)
557 goto nla_put_failure;
558
559 i = 0;
560 #define CMD(op, n) \
561 do { \
562 if (dev->ops->op) { \
563 i++; \
564 NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
565 } \
566 } while (0)
567
568 CMD(add_virtual_intf, NEW_INTERFACE);
569 CMD(change_virtual_intf, SET_INTERFACE);
570 CMD(add_key, NEW_KEY);
571 CMD(add_beacon, NEW_BEACON);
572 CMD(add_station, NEW_STATION);
573 CMD(add_mpath, NEW_MPATH);
574 CMD(set_mesh_params, SET_MESH_PARAMS);
575 CMD(change_bss, SET_BSS);
576 CMD(auth, AUTHENTICATE);
577 CMD(assoc, ASSOCIATE);
578 CMD(deauth, DEAUTHENTICATE);
579 CMD(disassoc, DISASSOCIATE);
580 CMD(join_ibss, JOIN_IBSS);
581 CMD(set_pmksa, SET_PMKSA);
582 CMD(del_pmksa, DEL_PMKSA);
583 CMD(flush_pmksa, FLUSH_PMKSA);
584 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
585 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
586 CMD(action, ACTION);
587 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
588 i++;
589 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
590 }
591 CMD(set_channel, SET_CHANNEL);
592
593 #undef CMD
594
595 if (dev->ops->connect || dev->ops->auth) {
596 i++;
597 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
598 }
599
600 if (dev->ops->disconnect || dev->ops->deauth) {
601 i++;
602 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
603 }
604
605 nla_nest_end(msg, nl_cmds);
606
607 return genlmsg_end(msg, hdr);
608
609 nla_put_failure:
610 genlmsg_cancel(msg, hdr);
611 return -EMSGSIZE;
612 }
613
614 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
615 {
616 int idx = 0;
617 int start = cb->args[0];
618 struct cfg80211_registered_device *dev;
619
620 mutex_lock(&cfg80211_mutex);
621 list_for_each_entry(dev, &cfg80211_rdev_list, list) {
622 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
623 continue;
624 if (++idx <= start)
625 continue;
626 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
627 cb->nlh->nlmsg_seq, NLM_F_MULTI,
628 dev) < 0) {
629 idx--;
630 break;
631 }
632 }
633 mutex_unlock(&cfg80211_mutex);
634
635 cb->args[0] = idx;
636
637 return skb->len;
638 }
639
640 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
641 {
642 struct sk_buff *msg;
643 struct cfg80211_registered_device *dev;
644
645 dev = cfg80211_get_dev_from_info(info);
646 if (IS_ERR(dev))
647 return PTR_ERR(dev);
648
649 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
650 if (!msg)
651 goto out_err;
652
653 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
654 goto out_free;
655
656 cfg80211_unlock_rdev(dev);
657
658 return genlmsg_reply(msg, info);
659
660 out_free:
661 nlmsg_free(msg);
662 out_err:
663 cfg80211_unlock_rdev(dev);
664 return -ENOBUFS;
665 }
666
667 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
668 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
669 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
670 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
671 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
672 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
673 };
674
675 static int parse_txq_params(struct nlattr *tb[],
676 struct ieee80211_txq_params *txq_params)
677 {
678 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
679 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
680 !tb[NL80211_TXQ_ATTR_AIFS])
681 return -EINVAL;
682
683 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
684 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
685 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
686 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
687 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
688
689 return 0;
690 }
691
692 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
693 {
694 /*
695 * You can only set the channel explicitly for AP, mesh
696 * and WDS type interfaces; all others have their channel
697 * managed via their respective "establish a connection"
698 * command (connect, join, ...)
699 *
700 * Monitors are special as they are normally slaved to
701 * whatever else is going on, so they behave as though
702 * you tried setting the wiphy channel itself.
703 */
704 return !wdev ||
705 wdev->iftype == NL80211_IFTYPE_AP ||
706 wdev->iftype == NL80211_IFTYPE_WDS ||
707 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
708 wdev->iftype == NL80211_IFTYPE_MONITOR;
709 }
710
711 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
712 struct wireless_dev *wdev,
713 struct genl_info *info)
714 {
715 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
716 u32 freq;
717 int result;
718
719 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
720 return -EINVAL;
721
722 if (!nl80211_can_set_dev_channel(wdev))
723 return -EOPNOTSUPP;
724
725 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
726 channel_type = nla_get_u32(info->attrs[
727 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
728 if (channel_type != NL80211_CHAN_NO_HT &&
729 channel_type != NL80211_CHAN_HT20 &&
730 channel_type != NL80211_CHAN_HT40PLUS &&
731 channel_type != NL80211_CHAN_HT40MINUS)
732 return -EINVAL;
733 }
734
735 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
736
737 mutex_lock(&rdev->devlist_mtx);
738 if (wdev) {
739 wdev_lock(wdev);
740 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
741 wdev_unlock(wdev);
742 } else {
743 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
744 }
745 mutex_unlock(&rdev->devlist_mtx);
746
747 return result;
748 }
749
750 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
751 {
752 struct cfg80211_registered_device *rdev;
753 struct net_device *netdev;
754 int result;
755
756 rtnl_lock();
757
758 result = get_rdev_dev_by_info_ifindex(info, &rdev, &netdev);
759 if (result)
760 goto unlock;
761
762 result = __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
763
764 unlock:
765 rtnl_unlock();
766
767 return result;
768 }
769
770 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
771 {
772 struct cfg80211_registered_device *rdev;
773 struct net_device *netdev = NULL;
774 struct wireless_dev *wdev;
775 int result, rem_txq_params = 0;
776 struct nlattr *nl_txq_params;
777 u32 changed;
778 u8 retry_short = 0, retry_long = 0;
779 u32 frag_threshold = 0, rts_threshold = 0;
780 u8 coverage_class = 0;
781
782 rtnl_lock();
783
784 /*
785 * Try to find the wiphy and netdev. Normally this
786 * function shouldn't need the netdev, but this is
787 * done for backward compatibility -- previously
788 * setting the channel was done per wiphy, but now
789 * it is per netdev. Previous userland like hostapd
790 * also passed a netdev to set_wiphy, so that it is
791 * possible to let that go to the right netdev!
792 */
793 mutex_lock(&cfg80211_mutex);
794
795 if (info->attrs[NL80211_ATTR_IFINDEX]) {
796 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
797
798 netdev = dev_get_by_index(genl_info_net(info), ifindex);
799 if (netdev && netdev->ieee80211_ptr) {
800 rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
801 mutex_lock(&rdev->mtx);
802 } else
803 netdev = NULL;
804 }
805
806 if (!netdev) {
807 rdev = __cfg80211_rdev_from_info(info);
808 if (IS_ERR(rdev)) {
809 mutex_unlock(&cfg80211_mutex);
810 result = PTR_ERR(rdev);
811 goto unlock;
812 }
813 wdev = NULL;
814 netdev = NULL;
815 result = 0;
816
817 mutex_lock(&rdev->mtx);
818 } else if (netif_running(netdev) &&
819 nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
820 wdev = netdev->ieee80211_ptr;
821 else
822 wdev = NULL;
823
824 /*
825 * end workaround code, by now the rdev is available
826 * and locked, and wdev may or may not be NULL.
827 */
828
829 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
830 result = cfg80211_dev_rename(
831 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
832
833 mutex_unlock(&cfg80211_mutex);
834
835 if (result)
836 goto bad_res;
837
838 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
839 struct ieee80211_txq_params txq_params;
840 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
841
842 if (!rdev->ops->set_txq_params) {
843 result = -EOPNOTSUPP;
844 goto bad_res;
845 }
846
847 nla_for_each_nested(nl_txq_params,
848 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
849 rem_txq_params) {
850 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
851 nla_data(nl_txq_params),
852 nla_len(nl_txq_params),
853 txq_params_policy);
854 result = parse_txq_params(tb, &txq_params);
855 if (result)
856 goto bad_res;
857
858 result = rdev->ops->set_txq_params(&rdev->wiphy,
859 &txq_params);
860 if (result)
861 goto bad_res;
862 }
863 }
864
865 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
866 result = __nl80211_set_channel(rdev, wdev, info);
867 if (result)
868 goto bad_res;
869 }
870
871 changed = 0;
872
873 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
874 retry_short = nla_get_u8(
875 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
876 if (retry_short == 0) {
877 result = -EINVAL;
878 goto bad_res;
879 }
880 changed |= WIPHY_PARAM_RETRY_SHORT;
881 }
882
883 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
884 retry_long = nla_get_u8(
885 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
886 if (retry_long == 0) {
887 result = -EINVAL;
888 goto bad_res;
889 }
890 changed |= WIPHY_PARAM_RETRY_LONG;
891 }
892
893 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
894 frag_threshold = nla_get_u32(
895 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
896 if (frag_threshold < 256) {
897 result = -EINVAL;
898 goto bad_res;
899 }
900 if (frag_threshold != (u32) -1) {
901 /*
902 * Fragments (apart from the last one) are required to
903 * have even length. Make the fragmentation code
904 * simpler by stripping LSB should someone try to use
905 * odd threshold value.
906 */
907 frag_threshold &= ~0x1;
908 }
909 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
910 }
911
912 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
913 rts_threshold = nla_get_u32(
914 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
915 changed |= WIPHY_PARAM_RTS_THRESHOLD;
916 }
917
918 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
919 coverage_class = nla_get_u8(
920 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
921 changed |= WIPHY_PARAM_COVERAGE_CLASS;
922 }
923
924 if (changed) {
925 u8 old_retry_short, old_retry_long;
926 u32 old_frag_threshold, old_rts_threshold;
927 u8 old_coverage_class;
928
929 if (!rdev->ops->set_wiphy_params) {
930 result = -EOPNOTSUPP;
931 goto bad_res;
932 }
933
934 old_retry_short = rdev->wiphy.retry_short;
935 old_retry_long = rdev->wiphy.retry_long;
936 old_frag_threshold = rdev->wiphy.frag_threshold;
937 old_rts_threshold = rdev->wiphy.rts_threshold;
938 old_coverage_class = rdev->wiphy.coverage_class;
939
940 if (changed & WIPHY_PARAM_RETRY_SHORT)
941 rdev->wiphy.retry_short = retry_short;
942 if (changed & WIPHY_PARAM_RETRY_LONG)
943 rdev->wiphy.retry_long = retry_long;
944 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
945 rdev->wiphy.frag_threshold = frag_threshold;
946 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
947 rdev->wiphy.rts_threshold = rts_threshold;
948 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
949 rdev->wiphy.coverage_class = coverage_class;
950
951 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
952 if (result) {
953 rdev->wiphy.retry_short = old_retry_short;
954 rdev->wiphy.retry_long = old_retry_long;
955 rdev->wiphy.frag_threshold = old_frag_threshold;
956 rdev->wiphy.rts_threshold = old_rts_threshold;
957 rdev->wiphy.coverage_class = old_coverage_class;
958 }
959 }
960
961 bad_res:
962 mutex_unlock(&rdev->mtx);
963 if (netdev)
964 dev_put(netdev);
965 unlock:
966 rtnl_unlock();
967 return result;
968 }
969
970
971 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
972 struct cfg80211_registered_device *rdev,
973 struct net_device *dev)
974 {
975 void *hdr;
976
977 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
978 if (!hdr)
979 return -1;
980
981 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
982 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
983 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
984 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
985
986 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
987 rdev->devlist_generation ^
988 (cfg80211_rdev_list_generation << 2));
989
990 return genlmsg_end(msg, hdr);
991
992 nla_put_failure:
993 genlmsg_cancel(msg, hdr);
994 return -EMSGSIZE;
995 }
996
997 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
998 {
999 int wp_idx = 0;
1000 int if_idx = 0;
1001 int wp_start = cb->args[0];
1002 int if_start = cb->args[1];
1003 struct cfg80211_registered_device *rdev;
1004 struct wireless_dev *wdev;
1005
1006 mutex_lock(&cfg80211_mutex);
1007 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1008 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1009 continue;
1010 if (wp_idx < wp_start) {
1011 wp_idx++;
1012 continue;
1013 }
1014 if_idx = 0;
1015
1016 mutex_lock(&rdev->devlist_mtx);
1017 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1018 if (if_idx < if_start) {
1019 if_idx++;
1020 continue;
1021 }
1022 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1023 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1024 rdev, wdev->netdev) < 0) {
1025 mutex_unlock(&rdev->devlist_mtx);
1026 goto out;
1027 }
1028 if_idx++;
1029 }
1030 mutex_unlock(&rdev->devlist_mtx);
1031
1032 wp_idx++;
1033 }
1034 out:
1035 mutex_unlock(&cfg80211_mutex);
1036
1037 cb->args[0] = wp_idx;
1038 cb->args[1] = if_idx;
1039
1040 return skb->len;
1041 }
1042
1043 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1044 {
1045 struct sk_buff *msg;
1046 struct cfg80211_registered_device *dev;
1047 struct net_device *netdev;
1048 int err;
1049
1050 err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
1051 if (err)
1052 return err;
1053
1054 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1055 if (!msg)
1056 goto out_err;
1057
1058 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1059 dev, netdev) < 0)
1060 goto out_free;
1061
1062 dev_put(netdev);
1063 cfg80211_unlock_rdev(dev);
1064
1065 return genlmsg_reply(msg, info);
1066
1067 out_free:
1068 nlmsg_free(msg);
1069 out_err:
1070 dev_put(netdev);
1071 cfg80211_unlock_rdev(dev);
1072 return -ENOBUFS;
1073 }
1074
1075 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1076 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1077 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1078 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1079 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1080 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1081 };
1082
1083 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1084 {
1085 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1086 int flag;
1087
1088 *mntrflags = 0;
1089
1090 if (!nla)
1091 return -EINVAL;
1092
1093 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1094 nla, mntr_flags_policy))
1095 return -EINVAL;
1096
1097 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1098 if (flags[flag])
1099 *mntrflags |= (1<<flag);
1100
1101 return 0;
1102 }
1103
1104 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1105 struct net_device *netdev, u8 use_4addr,
1106 enum nl80211_iftype iftype)
1107 {
1108 if (!use_4addr) {
1109 if (netdev && netdev->br_port)
1110 return -EBUSY;
1111 return 0;
1112 }
1113
1114 switch (iftype) {
1115 case NL80211_IFTYPE_AP_VLAN:
1116 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1117 return 0;
1118 break;
1119 case NL80211_IFTYPE_STATION:
1120 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1121 return 0;
1122 break;
1123 default:
1124 break;
1125 }
1126
1127 return -EOPNOTSUPP;
1128 }
1129
1130 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1131 {
1132 struct cfg80211_registered_device *rdev;
1133 struct vif_params params;
1134 int err;
1135 enum nl80211_iftype otype, ntype;
1136 struct net_device *dev;
1137 u32 _flags, *flags = NULL;
1138 bool change = false;
1139
1140 memset(&params, 0, sizeof(params));
1141
1142 rtnl_lock();
1143
1144 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1145 if (err)
1146 goto unlock_rtnl;
1147
1148 otype = ntype = dev->ieee80211_ptr->iftype;
1149
1150 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1151 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1152 if (otype != ntype)
1153 change = true;
1154 if (ntype > NL80211_IFTYPE_MAX) {
1155 err = -EINVAL;
1156 goto unlock;
1157 }
1158 }
1159
1160 if (info->attrs[NL80211_ATTR_MESH_ID]) {
1161 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1162 err = -EINVAL;
1163 goto unlock;
1164 }
1165 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1166 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1167 change = true;
1168 }
1169
1170 if (info->attrs[NL80211_ATTR_4ADDR]) {
1171 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1172 change = true;
1173 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1174 if (err)
1175 goto unlock;
1176 } else {
1177 params.use_4addr = -1;
1178 }
1179
1180 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1181 if (ntype != NL80211_IFTYPE_MONITOR) {
1182 err = -EINVAL;
1183 goto unlock;
1184 }
1185 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1186 &_flags);
1187 if (err)
1188 goto unlock;
1189
1190 flags = &_flags;
1191 change = true;
1192 }
1193
1194 if (change)
1195 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1196 else
1197 err = 0;
1198
1199 if (!err && params.use_4addr != -1)
1200 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1201
1202 unlock:
1203 dev_put(dev);
1204 cfg80211_unlock_rdev(rdev);
1205 unlock_rtnl:
1206 rtnl_unlock();
1207 return err;
1208 }
1209
1210 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1211 {
1212 struct cfg80211_registered_device *rdev;
1213 struct vif_params params;
1214 int err;
1215 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1216 u32 flags;
1217
1218 memset(&params, 0, sizeof(params));
1219
1220 if (!info->attrs[NL80211_ATTR_IFNAME])
1221 return -EINVAL;
1222
1223 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1224 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1225 if (type > NL80211_IFTYPE_MAX)
1226 return -EINVAL;
1227 }
1228
1229 rtnl_lock();
1230
1231 rdev = cfg80211_get_dev_from_info(info);
1232 if (IS_ERR(rdev)) {
1233 err = PTR_ERR(rdev);
1234 goto unlock_rtnl;
1235 }
1236
1237 if (!rdev->ops->add_virtual_intf ||
1238 !(rdev->wiphy.interface_modes & (1 << type))) {
1239 err = -EOPNOTSUPP;
1240 goto unlock;
1241 }
1242
1243 if (type == NL80211_IFTYPE_MESH_POINT &&
1244 info->attrs[NL80211_ATTR_MESH_ID]) {
1245 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1246 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1247 }
1248
1249 if (info->attrs[NL80211_ATTR_4ADDR]) {
1250 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1251 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1252 if (err)
1253 goto unlock;
1254 }
1255
1256 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1257 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1258 &flags);
1259 err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1260 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1261 type, err ? NULL : &flags, &params);
1262
1263 unlock:
1264 cfg80211_unlock_rdev(rdev);
1265 unlock_rtnl:
1266 rtnl_unlock();
1267 return err;
1268 }
1269
1270 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1271 {
1272 struct cfg80211_registered_device *rdev;
1273 int err;
1274 struct net_device *dev;
1275
1276 rtnl_lock();
1277
1278 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1279 if (err)
1280 goto unlock_rtnl;
1281
1282 if (!rdev->ops->del_virtual_intf) {
1283 err = -EOPNOTSUPP;
1284 goto out;
1285 }
1286
1287 err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1288
1289 out:
1290 cfg80211_unlock_rdev(rdev);
1291 dev_put(dev);
1292 unlock_rtnl:
1293 rtnl_unlock();
1294 return err;
1295 }
1296
1297 struct get_key_cookie {
1298 struct sk_buff *msg;
1299 int error;
1300 int idx;
1301 };
1302
1303 static void get_key_callback(void *c, struct key_params *params)
1304 {
1305 struct nlattr *key;
1306 struct get_key_cookie *cookie = c;
1307
1308 if (params->key)
1309 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1310 params->key_len, params->key);
1311
1312 if (params->seq)
1313 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1314 params->seq_len, params->seq);
1315
1316 if (params->cipher)
1317 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1318 params->cipher);
1319
1320 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1321 if (!key)
1322 goto nla_put_failure;
1323
1324 if (params->key)
1325 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1326 params->key_len, params->key);
1327
1328 if (params->seq)
1329 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1330 params->seq_len, params->seq);
1331
1332 if (params->cipher)
1333 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1334 params->cipher);
1335
1336 NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1337
1338 nla_nest_end(cookie->msg, key);
1339
1340 return;
1341 nla_put_failure:
1342 cookie->error = 1;
1343 }
1344
1345 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1346 {
1347 struct cfg80211_registered_device *rdev;
1348 int err;
1349 struct net_device *dev;
1350 u8 key_idx = 0;
1351 u8 *mac_addr = NULL;
1352 struct get_key_cookie cookie = {
1353 .error = 0,
1354 };
1355 void *hdr;
1356 struct sk_buff *msg;
1357
1358 if (info->attrs[NL80211_ATTR_KEY_IDX])
1359 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1360
1361 if (key_idx > 5)
1362 return -EINVAL;
1363
1364 if (info->attrs[NL80211_ATTR_MAC])
1365 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1366
1367 rtnl_lock();
1368
1369 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1370 if (err)
1371 goto unlock_rtnl;
1372
1373 if (!rdev->ops->get_key) {
1374 err = -EOPNOTSUPP;
1375 goto out;
1376 }
1377
1378 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1379 if (!msg) {
1380 err = -ENOMEM;
1381 goto out;
1382 }
1383
1384 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1385 NL80211_CMD_NEW_KEY);
1386
1387 if (IS_ERR(hdr)) {
1388 err = PTR_ERR(hdr);
1389 goto free_msg;
1390 }
1391
1392 cookie.msg = msg;
1393 cookie.idx = key_idx;
1394
1395 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1396 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1397 if (mac_addr)
1398 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1399
1400 err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1401 &cookie, get_key_callback);
1402
1403 if (err)
1404 goto free_msg;
1405
1406 if (cookie.error)
1407 goto nla_put_failure;
1408
1409 genlmsg_end(msg, hdr);
1410 err = genlmsg_reply(msg, info);
1411 goto out;
1412
1413 nla_put_failure:
1414 err = -ENOBUFS;
1415 free_msg:
1416 nlmsg_free(msg);
1417 out:
1418 cfg80211_unlock_rdev(rdev);
1419 dev_put(dev);
1420 unlock_rtnl:
1421 rtnl_unlock();
1422
1423 return err;
1424 }
1425
1426 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1427 {
1428 struct cfg80211_registered_device *rdev;
1429 struct key_parse key;
1430 int err;
1431 struct net_device *dev;
1432 int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1433 u8 key_index);
1434
1435 err = nl80211_parse_key(info, &key);
1436 if (err)
1437 return err;
1438
1439 if (key.idx < 0)
1440 return -EINVAL;
1441
1442 /* only support setting default key */
1443 if (!key.def && !key.defmgmt)
1444 return -EINVAL;
1445
1446 rtnl_lock();
1447
1448 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1449 if (err)
1450 goto unlock_rtnl;
1451
1452 if (key.def)
1453 func = rdev->ops->set_default_key;
1454 else
1455 func = rdev->ops->set_default_mgmt_key;
1456
1457 if (!func) {
1458 err = -EOPNOTSUPP;
1459 goto out;
1460 }
1461
1462 wdev_lock(dev->ieee80211_ptr);
1463 err = nl80211_key_allowed(dev->ieee80211_ptr);
1464 if (!err)
1465 err = func(&rdev->wiphy, dev, key.idx);
1466
1467 #ifdef CONFIG_CFG80211_WEXT
1468 if (!err) {
1469 if (func == rdev->ops->set_default_key)
1470 dev->ieee80211_ptr->wext.default_key = key.idx;
1471 else
1472 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1473 }
1474 #endif
1475 wdev_unlock(dev->ieee80211_ptr);
1476
1477 out:
1478 cfg80211_unlock_rdev(rdev);
1479 dev_put(dev);
1480
1481 unlock_rtnl:
1482 rtnl_unlock();
1483
1484 return err;
1485 }
1486
1487 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1488 {
1489 struct cfg80211_registered_device *rdev;
1490 int err;
1491 struct net_device *dev;
1492 struct key_parse key;
1493 u8 *mac_addr = NULL;
1494
1495 err = nl80211_parse_key(info, &key);
1496 if (err)
1497 return err;
1498
1499 if (!key.p.key)
1500 return -EINVAL;
1501
1502 if (info->attrs[NL80211_ATTR_MAC])
1503 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1504
1505 rtnl_lock();
1506
1507 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1508 if (err)
1509 goto unlock_rtnl;
1510
1511 if (!rdev->ops->add_key) {
1512 err = -EOPNOTSUPP;
1513 goto out;
1514 }
1515
1516 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1517 err = -EINVAL;
1518 goto out;
1519 }
1520
1521 wdev_lock(dev->ieee80211_ptr);
1522 err = nl80211_key_allowed(dev->ieee80211_ptr);
1523 if (!err)
1524 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1525 mac_addr, &key.p);
1526 wdev_unlock(dev->ieee80211_ptr);
1527
1528 out:
1529 cfg80211_unlock_rdev(rdev);
1530 dev_put(dev);
1531 unlock_rtnl:
1532 rtnl_unlock();
1533
1534 return err;
1535 }
1536
1537 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1538 {
1539 struct cfg80211_registered_device *rdev;
1540 int err;
1541 struct net_device *dev;
1542 u8 *mac_addr = NULL;
1543 struct key_parse key;
1544
1545 err = nl80211_parse_key(info, &key);
1546 if (err)
1547 return err;
1548
1549 if (info->attrs[NL80211_ATTR_MAC])
1550 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1551
1552 rtnl_lock();
1553
1554 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1555 if (err)
1556 goto unlock_rtnl;
1557
1558 if (!rdev->ops->del_key) {
1559 err = -EOPNOTSUPP;
1560 goto out;
1561 }
1562
1563 wdev_lock(dev->ieee80211_ptr);
1564 err = nl80211_key_allowed(dev->ieee80211_ptr);
1565 if (!err)
1566 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1567
1568 #ifdef CONFIG_CFG80211_WEXT
1569 if (!err) {
1570 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1571 dev->ieee80211_ptr->wext.default_key = -1;
1572 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1573 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1574 }
1575 #endif
1576 wdev_unlock(dev->ieee80211_ptr);
1577
1578 out:
1579 cfg80211_unlock_rdev(rdev);
1580 dev_put(dev);
1581
1582 unlock_rtnl:
1583 rtnl_unlock();
1584
1585 return err;
1586 }
1587
1588 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1589 {
1590 int (*call)(struct wiphy *wiphy, struct net_device *dev,
1591 struct beacon_parameters *info);
1592 struct cfg80211_registered_device *rdev;
1593 int err;
1594 struct net_device *dev;
1595 struct beacon_parameters params;
1596 int haveinfo = 0;
1597
1598 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1599 return -EINVAL;
1600
1601 rtnl_lock();
1602
1603 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1604 if (err)
1605 goto unlock_rtnl;
1606
1607 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1608 err = -EOPNOTSUPP;
1609 goto out;
1610 }
1611
1612 switch (info->genlhdr->cmd) {
1613 case NL80211_CMD_NEW_BEACON:
1614 /* these are required for NEW_BEACON */
1615 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1616 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1617 !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1618 err = -EINVAL;
1619 goto out;
1620 }
1621
1622 call = rdev->ops->add_beacon;
1623 break;
1624 case NL80211_CMD_SET_BEACON:
1625 call = rdev->ops->set_beacon;
1626 break;
1627 default:
1628 WARN_ON(1);
1629 err = -EOPNOTSUPP;
1630 goto out;
1631 }
1632
1633 if (!call) {
1634 err = -EOPNOTSUPP;
1635 goto out;
1636 }
1637
1638 memset(&params, 0, sizeof(params));
1639
1640 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1641 params.interval =
1642 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1643 haveinfo = 1;
1644 }
1645
1646 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1647 params.dtim_period =
1648 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1649 haveinfo = 1;
1650 }
1651
1652 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1653 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1654 params.head_len =
1655 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1656 haveinfo = 1;
1657 }
1658
1659 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1660 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1661 params.tail_len =
1662 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1663 haveinfo = 1;
1664 }
1665
1666 if (!haveinfo) {
1667 err = -EINVAL;
1668 goto out;
1669 }
1670
1671 err = call(&rdev->wiphy, dev, &params);
1672
1673 out:
1674 cfg80211_unlock_rdev(rdev);
1675 dev_put(dev);
1676 unlock_rtnl:
1677 rtnl_unlock();
1678
1679 return err;
1680 }
1681
1682 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1683 {
1684 struct cfg80211_registered_device *rdev;
1685 int err;
1686 struct net_device *dev;
1687
1688 rtnl_lock();
1689
1690 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1691 if (err)
1692 goto unlock_rtnl;
1693
1694 if (!rdev->ops->del_beacon) {
1695 err = -EOPNOTSUPP;
1696 goto out;
1697 }
1698
1699 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1700 err = -EOPNOTSUPP;
1701 goto out;
1702 }
1703 err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1704
1705 out:
1706 cfg80211_unlock_rdev(rdev);
1707 dev_put(dev);
1708 unlock_rtnl:
1709 rtnl_unlock();
1710
1711 return err;
1712 }
1713
1714 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1715 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1716 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1717 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1718 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1719 };
1720
1721 static int parse_station_flags(struct genl_info *info,
1722 struct station_parameters *params)
1723 {
1724 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1725 struct nlattr *nla;
1726 int flag;
1727
1728 /*
1729 * Try parsing the new attribute first so userspace
1730 * can specify both for older kernels.
1731 */
1732 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1733 if (nla) {
1734 struct nl80211_sta_flag_update *sta_flags;
1735
1736 sta_flags = nla_data(nla);
1737 params->sta_flags_mask = sta_flags->mask;
1738 params->sta_flags_set = sta_flags->set;
1739 if ((params->sta_flags_mask |
1740 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1741 return -EINVAL;
1742 return 0;
1743 }
1744
1745 /* if present, parse the old attribute */
1746
1747 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1748 if (!nla)
1749 return 0;
1750
1751 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1752 nla, sta_flags_policy))
1753 return -EINVAL;
1754
1755 params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1756 params->sta_flags_mask &= ~1;
1757
1758 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1759 if (flags[flag])
1760 params->sta_flags_set |= (1<<flag);
1761
1762 return 0;
1763 }
1764
1765 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1766 int flags, struct net_device *dev,
1767 const u8 *mac_addr, struct station_info *sinfo)
1768 {
1769 void *hdr;
1770 struct nlattr *sinfoattr, *txrate;
1771 u16 bitrate;
1772
1773 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1774 if (!hdr)
1775 return -1;
1776
1777 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1778 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1779
1780 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1781
1782 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1783 if (!sinfoattr)
1784 goto nla_put_failure;
1785 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1786 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1787 sinfo->inactive_time);
1788 if (sinfo->filled & STATION_INFO_RX_BYTES)
1789 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1790 sinfo->rx_bytes);
1791 if (sinfo->filled & STATION_INFO_TX_BYTES)
1792 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1793 sinfo->tx_bytes);
1794 if (sinfo->filled & STATION_INFO_LLID)
1795 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1796 sinfo->llid);
1797 if (sinfo->filled & STATION_INFO_PLID)
1798 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1799 sinfo->plid);
1800 if (sinfo->filled & STATION_INFO_PLINK_STATE)
1801 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1802 sinfo->plink_state);
1803 if (sinfo->filled & STATION_INFO_SIGNAL)
1804 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1805 sinfo->signal);
1806 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1807 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1808 if (!txrate)
1809 goto nla_put_failure;
1810
1811 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1812 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1813 if (bitrate > 0)
1814 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1815
1816 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1817 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1818 sinfo->txrate.mcs);
1819 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1820 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1821 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1822 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1823
1824 nla_nest_end(msg, txrate);
1825 }
1826 if (sinfo->filled & STATION_INFO_RX_PACKETS)
1827 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1828 sinfo->rx_packets);
1829 if (sinfo->filled & STATION_INFO_TX_PACKETS)
1830 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1831 sinfo->tx_packets);
1832 nla_nest_end(msg, sinfoattr);
1833
1834 return genlmsg_end(msg, hdr);
1835
1836 nla_put_failure:
1837 genlmsg_cancel(msg, hdr);
1838 return -EMSGSIZE;
1839 }
1840
1841 static int nl80211_dump_station(struct sk_buff *skb,
1842 struct netlink_callback *cb)
1843 {
1844 struct station_info sinfo;
1845 struct cfg80211_registered_device *dev;
1846 struct net_device *netdev;
1847 u8 mac_addr[ETH_ALEN];
1848 int ifidx = cb->args[0];
1849 int sta_idx = cb->args[1];
1850 int err;
1851
1852 if (!ifidx)
1853 ifidx = nl80211_get_ifidx(cb);
1854 if (ifidx < 0)
1855 return ifidx;
1856
1857 rtnl_lock();
1858
1859 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1860 if (!netdev) {
1861 err = -ENODEV;
1862 goto out_rtnl;
1863 }
1864
1865 dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1866 if (IS_ERR(dev)) {
1867 err = PTR_ERR(dev);
1868 goto out_rtnl;
1869 }
1870
1871 if (!dev->ops->dump_station) {
1872 err = -EOPNOTSUPP;
1873 goto out_err;
1874 }
1875
1876 while (1) {
1877 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1878 mac_addr, &sinfo);
1879 if (err == -ENOENT)
1880 break;
1881 if (err)
1882 goto out_err;
1883
1884 if (nl80211_send_station(skb,
1885 NETLINK_CB(cb->skb).pid,
1886 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1887 netdev, mac_addr,
1888 &sinfo) < 0)
1889 goto out;
1890
1891 sta_idx++;
1892 }
1893
1894
1895 out:
1896 cb->args[1] = sta_idx;
1897 err = skb->len;
1898 out_err:
1899 cfg80211_unlock_rdev(dev);
1900 out_rtnl:
1901 rtnl_unlock();
1902
1903 return err;
1904 }
1905
1906 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1907 {
1908 struct cfg80211_registered_device *rdev;
1909 int err;
1910 struct net_device *dev;
1911 struct station_info sinfo;
1912 struct sk_buff *msg;
1913 u8 *mac_addr = NULL;
1914
1915 memset(&sinfo, 0, sizeof(sinfo));
1916
1917 if (!info->attrs[NL80211_ATTR_MAC])
1918 return -EINVAL;
1919
1920 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1921
1922 rtnl_lock();
1923
1924 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1925 if (err)
1926 goto out_rtnl;
1927
1928 if (!rdev->ops->get_station) {
1929 err = -EOPNOTSUPP;
1930 goto out;
1931 }
1932
1933 err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1934 if (err)
1935 goto out;
1936
1937 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1938 if (!msg)
1939 goto out;
1940
1941 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1942 dev, mac_addr, &sinfo) < 0)
1943 goto out_free;
1944
1945 err = genlmsg_reply(msg, info);
1946 goto out;
1947
1948 out_free:
1949 nlmsg_free(msg);
1950 out:
1951 cfg80211_unlock_rdev(rdev);
1952 dev_put(dev);
1953 out_rtnl:
1954 rtnl_unlock();
1955
1956 return err;
1957 }
1958
1959 /*
1960 * Get vlan interface making sure it is running and on the right wiphy.
1961 */
1962 static int get_vlan(struct genl_info *info,
1963 struct cfg80211_registered_device *rdev,
1964 struct net_device **vlan)
1965 {
1966 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1967 *vlan = NULL;
1968
1969 if (vlanattr) {
1970 *vlan = dev_get_by_index(genl_info_net(info),
1971 nla_get_u32(vlanattr));
1972 if (!*vlan)
1973 return -ENODEV;
1974 if (!(*vlan)->ieee80211_ptr)
1975 return -EINVAL;
1976 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1977 return -EINVAL;
1978 if (!netif_running(*vlan))
1979 return -ENETDOWN;
1980 }
1981 return 0;
1982 }
1983
1984 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1985 {
1986 struct cfg80211_registered_device *rdev;
1987 int err;
1988 struct net_device *dev;
1989 struct station_parameters params;
1990 u8 *mac_addr = NULL;
1991
1992 memset(&params, 0, sizeof(params));
1993
1994 params.listen_interval = -1;
1995
1996 if (info->attrs[NL80211_ATTR_STA_AID])
1997 return -EINVAL;
1998
1999 if (!info->attrs[NL80211_ATTR_MAC])
2000 return -EINVAL;
2001
2002 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2003
2004 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2005 params.supported_rates =
2006 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2007 params.supported_rates_len =
2008 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2009 }
2010
2011 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2012 params.listen_interval =
2013 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2014
2015 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2016 params.ht_capa =
2017 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2018
2019 if (parse_station_flags(info, &params))
2020 return -EINVAL;
2021
2022 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2023 params.plink_action =
2024 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2025
2026 rtnl_lock();
2027
2028 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2029 if (err)
2030 goto out_rtnl;
2031
2032 err = get_vlan(info, rdev, &params.vlan);
2033 if (err)
2034 goto out;
2035
2036 /* validate settings */
2037 err = 0;
2038
2039 switch (dev->ieee80211_ptr->iftype) {
2040 case NL80211_IFTYPE_AP:
2041 case NL80211_IFTYPE_AP_VLAN:
2042 /* disallow mesh-specific things */
2043 if (params.plink_action)
2044 err = -EINVAL;
2045 break;
2046 case NL80211_IFTYPE_STATION:
2047 /* disallow everything but AUTHORIZED flag */
2048 if (params.plink_action)
2049 err = -EINVAL;
2050 if (params.vlan)
2051 err = -EINVAL;
2052 if (params.supported_rates)
2053 err = -EINVAL;
2054 if (params.ht_capa)
2055 err = -EINVAL;
2056 if (params.listen_interval >= 0)
2057 err = -EINVAL;
2058 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2059 err = -EINVAL;
2060 break;
2061 case NL80211_IFTYPE_MESH_POINT:
2062 /* disallow things mesh doesn't support */
2063 if (params.vlan)
2064 err = -EINVAL;
2065 if (params.ht_capa)
2066 err = -EINVAL;
2067 if (params.listen_interval >= 0)
2068 err = -EINVAL;
2069 if (params.supported_rates)
2070 err = -EINVAL;
2071 if (params.sta_flags_mask)
2072 err = -EINVAL;
2073 break;
2074 default:
2075 err = -EINVAL;
2076 }
2077
2078 if (err)
2079 goto out;
2080
2081 if (!rdev->ops->change_station) {
2082 err = -EOPNOTSUPP;
2083 goto out;
2084 }
2085
2086 err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2087
2088 out:
2089 if (params.vlan)
2090 dev_put(params.vlan);
2091 cfg80211_unlock_rdev(rdev);
2092 dev_put(dev);
2093 out_rtnl:
2094 rtnl_unlock();
2095
2096 return err;
2097 }
2098
2099 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2100 {
2101 struct cfg80211_registered_device *rdev;
2102 int err;
2103 struct net_device *dev;
2104 struct station_parameters params;
2105 u8 *mac_addr = NULL;
2106
2107 memset(&params, 0, sizeof(params));
2108
2109 if (!info->attrs[NL80211_ATTR_MAC])
2110 return -EINVAL;
2111
2112 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2113 return -EINVAL;
2114
2115 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2116 return -EINVAL;
2117
2118 if (!info->attrs[NL80211_ATTR_STA_AID])
2119 return -EINVAL;
2120
2121 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2122 params.supported_rates =
2123 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2124 params.supported_rates_len =
2125 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2126 params.listen_interval =
2127 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2128
2129 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2130 if (!params.aid || params.aid > IEEE80211_MAX_AID)
2131 return -EINVAL;
2132
2133 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2134 params.ht_capa =
2135 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2136
2137 if (parse_station_flags(info, &params))
2138 return -EINVAL;
2139
2140 rtnl_lock();
2141
2142 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2143 if (err)
2144 goto out_rtnl;
2145
2146 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2147 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2148 err = -EINVAL;
2149 goto out;
2150 }
2151
2152 err = get_vlan(info, rdev, &params.vlan);
2153 if (err)
2154 goto out;
2155
2156 /* validate settings */
2157 err = 0;
2158
2159 if (!rdev->ops->add_station) {
2160 err = -EOPNOTSUPP;
2161 goto out;
2162 }
2163
2164 if (!netif_running(dev)) {
2165 err = -ENETDOWN;
2166 goto out;
2167 }
2168
2169 err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2170
2171 out:
2172 if (params.vlan)
2173 dev_put(params.vlan);
2174 cfg80211_unlock_rdev(rdev);
2175 dev_put(dev);
2176 out_rtnl:
2177 rtnl_unlock();
2178
2179 return err;
2180 }
2181
2182 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2183 {
2184 struct cfg80211_registered_device *rdev;
2185 int err;
2186 struct net_device *dev;
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 rtnl_lock();
2193
2194 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2195 if (err)
2196 goto out_rtnl;
2197
2198 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2199 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2200 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2201 err = -EINVAL;
2202 goto out;
2203 }
2204
2205 if (!rdev->ops->del_station) {
2206 err = -EOPNOTSUPP;
2207 goto out;
2208 }
2209
2210 err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2211
2212 out:
2213 cfg80211_unlock_rdev(rdev);
2214 dev_put(dev);
2215 out_rtnl:
2216 rtnl_unlock();
2217
2218 return err;
2219 }
2220
2221 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2222 int flags, struct net_device *dev,
2223 u8 *dst, u8 *next_hop,
2224 struct mpath_info *pinfo)
2225 {
2226 void *hdr;
2227 struct nlattr *pinfoattr;
2228
2229 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2230 if (!hdr)
2231 return -1;
2232
2233 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2234 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2235 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2236
2237 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2238
2239 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2240 if (!pinfoattr)
2241 goto nla_put_failure;
2242 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2243 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2244 pinfo->frame_qlen);
2245 if (pinfo->filled & MPATH_INFO_SN)
2246 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2247 pinfo->sn);
2248 if (pinfo->filled & MPATH_INFO_METRIC)
2249 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2250 pinfo->metric);
2251 if (pinfo->filled & MPATH_INFO_EXPTIME)
2252 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2253 pinfo->exptime);
2254 if (pinfo->filled & MPATH_INFO_FLAGS)
2255 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2256 pinfo->flags);
2257 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2258 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2259 pinfo->discovery_timeout);
2260 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2261 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2262 pinfo->discovery_retries);
2263
2264 nla_nest_end(msg, pinfoattr);
2265
2266 return genlmsg_end(msg, hdr);
2267
2268 nla_put_failure:
2269 genlmsg_cancel(msg, hdr);
2270 return -EMSGSIZE;
2271 }
2272
2273 static int nl80211_dump_mpath(struct sk_buff *skb,
2274 struct netlink_callback *cb)
2275 {
2276 struct mpath_info pinfo;
2277 struct cfg80211_registered_device *dev;
2278 struct net_device *netdev;
2279 u8 dst[ETH_ALEN];
2280 u8 next_hop[ETH_ALEN];
2281 int ifidx = cb->args[0];
2282 int path_idx = cb->args[1];
2283 int err;
2284
2285 if (!ifidx)
2286 ifidx = nl80211_get_ifidx(cb);
2287 if (ifidx < 0)
2288 return ifidx;
2289
2290 rtnl_lock();
2291
2292 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2293 if (!netdev) {
2294 err = -ENODEV;
2295 goto out_rtnl;
2296 }
2297
2298 dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2299 if (IS_ERR(dev)) {
2300 err = PTR_ERR(dev);
2301 goto out_rtnl;
2302 }
2303
2304 if (!dev->ops->dump_mpath) {
2305 err = -EOPNOTSUPP;
2306 goto out_err;
2307 }
2308
2309 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2310 err = -EOPNOTSUPP;
2311 goto out_err;
2312 }
2313
2314 while (1) {
2315 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2316 dst, next_hop, &pinfo);
2317 if (err == -ENOENT)
2318 break;
2319 if (err)
2320 goto out_err;
2321
2322 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2323 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2324 netdev, dst, next_hop,
2325 &pinfo) < 0)
2326 goto out;
2327
2328 path_idx++;
2329 }
2330
2331
2332 out:
2333 cb->args[1] = path_idx;
2334 err = skb->len;
2335 out_err:
2336 cfg80211_unlock_rdev(dev);
2337 out_rtnl:
2338 rtnl_unlock();
2339
2340 return err;
2341 }
2342
2343 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2344 {
2345 struct cfg80211_registered_device *rdev;
2346 int err;
2347 struct net_device *dev;
2348 struct mpath_info pinfo;
2349 struct sk_buff *msg;
2350 u8 *dst = NULL;
2351 u8 next_hop[ETH_ALEN];
2352
2353 memset(&pinfo, 0, sizeof(pinfo));
2354
2355 if (!info->attrs[NL80211_ATTR_MAC])
2356 return -EINVAL;
2357
2358 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2359
2360 rtnl_lock();
2361
2362 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2363 if (err)
2364 goto out_rtnl;
2365
2366 if (!rdev->ops->get_mpath) {
2367 err = -EOPNOTSUPP;
2368 goto out;
2369 }
2370
2371 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2372 err = -EOPNOTSUPP;
2373 goto out;
2374 }
2375
2376 err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2377 if (err)
2378 goto out;
2379
2380 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2381 if (!msg)
2382 goto out;
2383
2384 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2385 dev, dst, next_hop, &pinfo) < 0)
2386 goto out_free;
2387
2388 err = genlmsg_reply(msg, info);
2389 goto out;
2390
2391 out_free:
2392 nlmsg_free(msg);
2393 out:
2394 cfg80211_unlock_rdev(rdev);
2395 dev_put(dev);
2396 out_rtnl:
2397 rtnl_unlock();
2398
2399 return err;
2400 }
2401
2402 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2403 {
2404 struct cfg80211_registered_device *rdev;
2405 int err;
2406 struct net_device *dev;
2407 u8 *dst = NULL;
2408 u8 *next_hop = NULL;
2409
2410 if (!info->attrs[NL80211_ATTR_MAC])
2411 return -EINVAL;
2412
2413 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2414 return -EINVAL;
2415
2416 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2417 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2418
2419 rtnl_lock();
2420
2421 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2422 if (err)
2423 goto out_rtnl;
2424
2425 if (!rdev->ops->change_mpath) {
2426 err = -EOPNOTSUPP;
2427 goto out;
2428 }
2429
2430 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2431 err = -EOPNOTSUPP;
2432 goto out;
2433 }
2434
2435 if (!netif_running(dev)) {
2436 err = -ENETDOWN;
2437 goto out;
2438 }
2439
2440 err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2441
2442 out:
2443 cfg80211_unlock_rdev(rdev);
2444 dev_put(dev);
2445 out_rtnl:
2446 rtnl_unlock();
2447
2448 return err;
2449 }
2450 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2451 {
2452 struct cfg80211_registered_device *rdev;
2453 int err;
2454 struct net_device *dev;
2455 u8 *dst = NULL;
2456 u8 *next_hop = NULL;
2457
2458 if (!info->attrs[NL80211_ATTR_MAC])
2459 return -EINVAL;
2460
2461 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2462 return -EINVAL;
2463
2464 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2465 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2466
2467 rtnl_lock();
2468
2469 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2470 if (err)
2471 goto out_rtnl;
2472
2473 if (!rdev->ops->add_mpath) {
2474 err = -EOPNOTSUPP;
2475 goto out;
2476 }
2477
2478 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2479 err = -EOPNOTSUPP;
2480 goto out;
2481 }
2482
2483 if (!netif_running(dev)) {
2484 err = -ENETDOWN;
2485 goto out;
2486 }
2487
2488 err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2489
2490 out:
2491 cfg80211_unlock_rdev(rdev);
2492 dev_put(dev);
2493 out_rtnl:
2494 rtnl_unlock();
2495
2496 return err;
2497 }
2498
2499 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2500 {
2501 struct cfg80211_registered_device *rdev;
2502 int err;
2503 struct net_device *dev;
2504 u8 *dst = NULL;
2505
2506 if (info->attrs[NL80211_ATTR_MAC])
2507 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2508
2509 rtnl_lock();
2510
2511 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2512 if (err)
2513 goto out_rtnl;
2514
2515 if (!rdev->ops->del_mpath) {
2516 err = -EOPNOTSUPP;
2517 goto out;
2518 }
2519
2520 err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2521
2522 out:
2523 cfg80211_unlock_rdev(rdev);
2524 dev_put(dev);
2525 out_rtnl:
2526 rtnl_unlock();
2527
2528 return err;
2529 }
2530
2531 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2532 {
2533 struct cfg80211_registered_device *rdev;
2534 int err;
2535 struct net_device *dev;
2536 struct bss_parameters params;
2537
2538 memset(&params, 0, sizeof(params));
2539 /* default to not changing parameters */
2540 params.use_cts_prot = -1;
2541 params.use_short_preamble = -1;
2542 params.use_short_slot_time = -1;
2543 params.ap_isolate = -1;
2544
2545 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2546 params.use_cts_prot =
2547 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2548 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2549 params.use_short_preamble =
2550 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2551 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2552 params.use_short_slot_time =
2553 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2554 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2555 params.basic_rates =
2556 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2557 params.basic_rates_len =
2558 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2559 }
2560 if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2561 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2562
2563 rtnl_lock();
2564
2565 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2566 if (err)
2567 goto out_rtnl;
2568
2569 if (!rdev->ops->change_bss) {
2570 err = -EOPNOTSUPP;
2571 goto out;
2572 }
2573
2574 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2575 err = -EOPNOTSUPP;
2576 goto out;
2577 }
2578
2579 err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2580
2581 out:
2582 cfg80211_unlock_rdev(rdev);
2583 dev_put(dev);
2584 out_rtnl:
2585 rtnl_unlock();
2586
2587 return err;
2588 }
2589
2590 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2591 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
2592 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
2593 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
2594 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
2595 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
2596 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
2597 };
2598
2599 static int parse_reg_rule(struct nlattr *tb[],
2600 struct ieee80211_reg_rule *reg_rule)
2601 {
2602 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2603 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2604
2605 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2606 return -EINVAL;
2607 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2608 return -EINVAL;
2609 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2610 return -EINVAL;
2611 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2612 return -EINVAL;
2613 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2614 return -EINVAL;
2615
2616 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2617
2618 freq_range->start_freq_khz =
2619 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2620 freq_range->end_freq_khz =
2621 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2622 freq_range->max_bandwidth_khz =
2623 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2624
2625 power_rule->max_eirp =
2626 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2627
2628 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2629 power_rule->max_antenna_gain =
2630 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2631
2632 return 0;
2633 }
2634
2635 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2636 {
2637 int r;
2638 char *data = NULL;
2639
2640 /*
2641 * You should only get this when cfg80211 hasn't yet initialized
2642 * completely when built-in to the kernel right between the time
2643 * window between nl80211_init() and regulatory_init(), if that is
2644 * even possible.
2645 */
2646 mutex_lock(&cfg80211_mutex);
2647 if (unlikely(!cfg80211_regdomain)) {
2648 mutex_unlock(&cfg80211_mutex);
2649 return -EINPROGRESS;
2650 }
2651 mutex_unlock(&cfg80211_mutex);
2652
2653 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2654 return -EINVAL;
2655
2656 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2657
2658 r = regulatory_hint_user(data);
2659
2660 return r;
2661 }
2662
2663 static int nl80211_get_mesh_params(struct sk_buff *skb,
2664 struct genl_info *info)
2665 {
2666 struct cfg80211_registered_device *rdev;
2667 struct mesh_config cur_params;
2668 int err;
2669 struct net_device *dev;
2670 void *hdr;
2671 struct nlattr *pinfoattr;
2672 struct sk_buff *msg;
2673
2674 rtnl_lock();
2675
2676 /* Look up our device */
2677 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2678 if (err)
2679 goto out_rtnl;
2680
2681 if (!rdev->ops->get_mesh_params) {
2682 err = -EOPNOTSUPP;
2683 goto out;
2684 }
2685
2686 /* Get the mesh params */
2687 err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2688 if (err)
2689 goto out;
2690
2691 /* Draw up a netlink message to send back */
2692 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2693 if (!msg) {
2694 err = -ENOBUFS;
2695 goto out;
2696 }
2697 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2698 NL80211_CMD_GET_MESH_PARAMS);
2699 if (!hdr)
2700 goto nla_put_failure;
2701 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2702 if (!pinfoattr)
2703 goto nla_put_failure;
2704 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2705 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2706 cur_params.dot11MeshRetryTimeout);
2707 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2708 cur_params.dot11MeshConfirmTimeout);
2709 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2710 cur_params.dot11MeshHoldingTimeout);
2711 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2712 cur_params.dot11MeshMaxPeerLinks);
2713 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2714 cur_params.dot11MeshMaxRetries);
2715 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2716 cur_params.dot11MeshTTL);
2717 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2718 cur_params.auto_open_plinks);
2719 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2720 cur_params.dot11MeshHWMPmaxPREQretries);
2721 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2722 cur_params.path_refresh_time);
2723 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2724 cur_params.min_discovery_timeout);
2725 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2726 cur_params.dot11MeshHWMPactivePathTimeout);
2727 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2728 cur_params.dot11MeshHWMPpreqMinInterval);
2729 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2730 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2731 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2732 cur_params.dot11MeshHWMPRootMode);
2733 nla_nest_end(msg, pinfoattr);
2734 genlmsg_end(msg, hdr);
2735 err = genlmsg_reply(msg, info);
2736 goto out;
2737
2738 nla_put_failure:
2739 genlmsg_cancel(msg, hdr);
2740 err = -EMSGSIZE;
2741 out:
2742 /* Cleanup */
2743 cfg80211_unlock_rdev(rdev);
2744 dev_put(dev);
2745 out_rtnl:
2746 rtnl_unlock();
2747
2748 return err;
2749 }
2750
2751 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2752 do {\
2753 if (table[attr_num]) {\
2754 cfg.param = nla_fn(table[attr_num]); \
2755 mask |= (1 << (attr_num - 1)); \
2756 } \
2757 } while (0);\
2758
2759 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2760 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2761 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2762 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2763 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2764 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2765 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2766 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2767
2768 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2769 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2770 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2771 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2772 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2773 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2774 };
2775
2776 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2777 {
2778 int err;
2779 u32 mask;
2780 struct cfg80211_registered_device *rdev;
2781 struct net_device *dev;
2782 struct mesh_config cfg;
2783 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2784 struct nlattr *parent_attr;
2785
2786 parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2787 if (!parent_attr)
2788 return -EINVAL;
2789 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2790 parent_attr, nl80211_meshconf_params_policy))
2791 return -EINVAL;
2792
2793 rtnl_lock();
2794
2795 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2796 if (err)
2797 goto out_rtnl;
2798
2799 if (!rdev->ops->set_mesh_params) {
2800 err = -EOPNOTSUPP;
2801 goto out;
2802 }
2803
2804 /* This makes sure that there aren't more than 32 mesh config
2805 * parameters (otherwise our bitfield scheme would not work.) */
2806 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2807
2808 /* Fill in the params struct */
2809 mask = 0;
2810 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2811 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2812 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2813 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2814 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2815 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2816 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2817 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2818 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2819 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2820 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2821 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2822 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2823 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2824 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2825 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2826 nla_get_u8);
2827 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2828 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2829 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2830 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2831 nla_get_u16);
2832 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2833 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2834 nla_get_u32);
2835 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2836 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2837 nla_get_u16);
2838 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2839 dot11MeshHWMPnetDiameterTraversalTime,
2840 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2841 nla_get_u16);
2842 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2843 dot11MeshHWMPRootMode, mask,
2844 NL80211_MESHCONF_HWMP_ROOTMODE,
2845 nla_get_u8);
2846
2847 /* Apply changes */
2848 err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2849
2850 out:
2851 /* cleanup */
2852 cfg80211_unlock_rdev(rdev);
2853 dev_put(dev);
2854 out_rtnl:
2855 rtnl_unlock();
2856
2857 return err;
2858 }
2859
2860 #undef FILL_IN_MESH_PARAM_IF_SET
2861
2862 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2863 {
2864 struct sk_buff *msg;
2865 void *hdr = NULL;
2866 struct nlattr *nl_reg_rules;
2867 unsigned int i;
2868 int err = -EINVAL;
2869
2870 mutex_lock(&cfg80211_mutex);
2871
2872 if (!cfg80211_regdomain)
2873 goto out;
2874
2875 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2876 if (!msg) {
2877 err = -ENOBUFS;
2878 goto out;
2879 }
2880
2881 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2882 NL80211_CMD_GET_REG);
2883 if (!hdr)
2884 goto nla_put_failure;
2885
2886 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2887 cfg80211_regdomain->alpha2);
2888
2889 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2890 if (!nl_reg_rules)
2891 goto nla_put_failure;
2892
2893 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2894 struct nlattr *nl_reg_rule;
2895 const struct ieee80211_reg_rule *reg_rule;
2896 const struct ieee80211_freq_range *freq_range;
2897 const struct ieee80211_power_rule *power_rule;
2898
2899 reg_rule = &cfg80211_regdomain->reg_rules[i];
2900 freq_range = &reg_rule->freq_range;
2901 power_rule = &reg_rule->power_rule;
2902
2903 nl_reg_rule = nla_nest_start(msg, i);
2904 if (!nl_reg_rule)
2905 goto nla_put_failure;
2906
2907 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2908 reg_rule->flags);
2909 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2910 freq_range->start_freq_khz);
2911 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2912 freq_range->end_freq_khz);
2913 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2914 freq_range->max_bandwidth_khz);
2915 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2916 power_rule->max_antenna_gain);
2917 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2918 power_rule->max_eirp);
2919
2920 nla_nest_end(msg, nl_reg_rule);
2921 }
2922
2923 nla_nest_end(msg, nl_reg_rules);
2924
2925 genlmsg_end(msg, hdr);
2926 err = genlmsg_reply(msg, info);
2927 goto out;
2928
2929 nla_put_failure:
2930 genlmsg_cancel(msg, hdr);
2931 err = -EMSGSIZE;
2932 out:
2933 mutex_unlock(&cfg80211_mutex);
2934 return err;
2935 }
2936
2937 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2938 {
2939 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2940 struct nlattr *nl_reg_rule;
2941 char *alpha2 = NULL;
2942 int rem_reg_rules = 0, r = 0;
2943 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2944 struct ieee80211_regdomain *rd = NULL;
2945
2946 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2947 return -EINVAL;
2948
2949 if (!info->attrs[NL80211_ATTR_REG_RULES])
2950 return -EINVAL;
2951
2952 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2953
2954 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2955 rem_reg_rules) {
2956 num_rules++;
2957 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2958 return -EINVAL;
2959 }
2960
2961 mutex_lock(&cfg80211_mutex);
2962
2963 if (!reg_is_valid_request(alpha2)) {
2964 r = -EINVAL;
2965 goto bad_reg;
2966 }
2967
2968 size_of_regd = sizeof(struct ieee80211_regdomain) +
2969 (num_rules * sizeof(struct ieee80211_reg_rule));
2970
2971 rd = kzalloc(size_of_regd, GFP_KERNEL);
2972 if (!rd) {
2973 r = -ENOMEM;
2974 goto bad_reg;
2975 }
2976
2977 rd->n_reg_rules = num_rules;
2978 rd->alpha2[0] = alpha2[0];
2979 rd->alpha2[1] = alpha2[1];
2980
2981 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2982 rem_reg_rules) {
2983 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2984 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2985 reg_rule_policy);
2986 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2987 if (r)
2988 goto bad_reg;
2989
2990 rule_idx++;
2991
2992 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2993 r = -EINVAL;
2994 goto bad_reg;
2995 }
2996 }
2997
2998 BUG_ON(rule_idx != num_rules);
2999
3000 r = set_regdom(rd);
3001
3002 mutex_unlock(&cfg80211_mutex);
3003
3004 return r;
3005
3006 bad_reg:
3007 mutex_unlock(&cfg80211_mutex);
3008 kfree(rd);
3009 return r;
3010 }
3011
3012 static int validate_scan_freqs(struct nlattr *freqs)
3013 {
3014 struct nlattr *attr1, *attr2;
3015 int n_channels = 0, tmp1, tmp2;
3016
3017 nla_for_each_nested(attr1, freqs, tmp1) {
3018 n_channels++;
3019 /*
3020 * Some hardware has a limited channel list for
3021 * scanning, and it is pretty much nonsensical
3022 * to scan for a channel twice, so disallow that
3023 * and don't require drivers to check that the
3024 * channel list they get isn't longer than what
3025 * they can scan, as long as they can scan all
3026 * the channels they registered at once.
3027 */
3028 nla_for_each_nested(attr2, freqs, tmp2)
3029 if (attr1 != attr2 &&
3030 nla_get_u32(attr1) == nla_get_u32(attr2))
3031 return 0;
3032 }
3033
3034 return n_channels;
3035 }
3036
3037 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3038 {
3039 struct cfg80211_registered_device *rdev;
3040 struct net_device *dev;
3041 struct cfg80211_scan_request *request;
3042 struct cfg80211_ssid *ssid;
3043 struct ieee80211_channel *channel;
3044 struct nlattr *attr;
3045 struct wiphy *wiphy;
3046 int err, tmp, n_ssids = 0, n_channels, i;
3047 enum ieee80211_band band;
3048 size_t ie_len;
3049
3050 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3051 return -EINVAL;
3052
3053 rtnl_lock();
3054
3055 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3056 if (err)
3057 goto out_rtnl;
3058
3059 wiphy = &rdev->wiphy;
3060
3061 if (!rdev->ops->scan) {
3062 err = -EOPNOTSUPP;
3063 goto out;
3064 }
3065
3066 if (!netif_running(dev)) {
3067 err = -ENETDOWN;
3068 goto out;
3069 }
3070
3071 if (rdev->scan_req) {
3072 err = -EBUSY;
3073 goto out;
3074 }
3075
3076 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3077 n_channels = validate_scan_freqs(
3078 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3079 if (!n_channels) {
3080 err = -EINVAL;
3081 goto out;
3082 }
3083 } else {
3084 n_channels = 0;
3085
3086 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3087 if (wiphy->bands[band])
3088 n_channels += wiphy->bands[band]->n_channels;
3089 }
3090
3091 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3092 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3093 n_ssids++;
3094
3095 if (n_ssids > wiphy->max_scan_ssids) {
3096 err = -EINVAL;
3097 goto out;
3098 }
3099
3100 if (info->attrs[NL80211_ATTR_IE])
3101 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3102 else
3103 ie_len = 0;
3104
3105 if (ie_len > wiphy->max_scan_ie_len) {
3106 err = -EINVAL;
3107 goto out;
3108 }
3109
3110 request = kzalloc(sizeof(*request)
3111 + sizeof(*ssid) * n_ssids
3112 + sizeof(channel) * n_channels
3113 + ie_len, GFP_KERNEL);
3114 if (!request) {
3115 err = -ENOMEM;
3116 goto out;
3117 }
3118
3119 if (n_ssids)
3120 request->ssids = (void *)&request->channels[n_channels];
3121 request->n_ssids = n_ssids;
3122 if (ie_len) {
3123 if (request->ssids)
3124 request->ie = (void *)(request->ssids + n_ssids);
3125 else
3126 request->ie = (void *)(request->channels + n_channels);
3127 }
3128
3129 i = 0;
3130 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3131 /* user specified, bail out if channel not found */
3132 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3133 struct ieee80211_channel *chan;
3134
3135 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3136
3137 if (!chan) {
3138 err = -EINVAL;
3139 goto out_free;
3140 }
3141
3142 /* ignore disabled channels */
3143 if (chan->flags & IEEE80211_CHAN_DISABLED)
3144 continue;
3145
3146 request->channels[i] = chan;
3147 i++;
3148 }
3149 } else {
3150 /* all channels */
3151 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3152 int j;
3153 if (!wiphy->bands[band])
3154 continue;
3155 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3156 struct ieee80211_channel *chan;
3157
3158 chan = &wiphy->bands[band]->channels[j];
3159
3160 if (chan->flags & IEEE80211_CHAN_DISABLED)
3161 continue;
3162
3163 request->channels[i] = chan;
3164 i++;
3165 }
3166 }
3167 }
3168
3169 if (!i) {
3170 err = -EINVAL;
3171 goto out_free;
3172 }
3173
3174 request->n_channels = i;
3175
3176 i = 0;
3177 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3178 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3179 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3180 err = -EINVAL;
3181 goto out_free;
3182 }
3183 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3184 request->ssids[i].ssid_len = nla_len(attr);
3185 i++;
3186 }
3187 }
3188
3189 if (info->attrs[NL80211_ATTR_IE]) {
3190 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3191 memcpy((void *)request->ie,
3192 nla_data(info->attrs[NL80211_ATTR_IE]),
3193 request->ie_len);
3194 }
3195
3196 request->dev = dev;
3197 request->wiphy = &rdev->wiphy;
3198
3199 rdev->scan_req = request;
3200 err = rdev->ops->scan(&rdev->wiphy, dev, request);
3201
3202 if (!err) {
3203 nl80211_send_scan_start(rdev, dev);
3204 dev_hold(dev);
3205 }
3206
3207 out_free:
3208 if (err) {
3209 rdev->scan_req = NULL;
3210 kfree(request);
3211 }
3212 out:
3213 cfg80211_unlock_rdev(rdev);
3214 dev_put(dev);
3215 out_rtnl:
3216 rtnl_unlock();
3217
3218 return err;
3219 }
3220
3221 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3222 struct cfg80211_registered_device *rdev,
3223 struct wireless_dev *wdev,
3224 struct cfg80211_internal_bss *intbss)
3225 {
3226 struct cfg80211_bss *res = &intbss->pub;
3227 void *hdr;
3228 struct nlattr *bss;
3229 int i;
3230
3231 ASSERT_WDEV_LOCK(wdev);
3232
3233 hdr = nl80211hdr_put(msg, pid, seq, flags,
3234 NL80211_CMD_NEW_SCAN_RESULTS);
3235 if (!hdr)
3236 return -1;
3237
3238 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3239 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3240
3241 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3242 if (!bss)
3243 goto nla_put_failure;
3244 if (!is_zero_ether_addr(res->bssid))
3245 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3246 if (res->information_elements && res->len_information_elements)
3247 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3248 res->len_information_elements,
3249 res->information_elements);
3250 if (res->beacon_ies && res->len_beacon_ies &&
3251 res->beacon_ies != res->information_elements)
3252 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3253 res->len_beacon_ies, res->beacon_ies);
3254 if (res->tsf)
3255 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3256 if (res->beacon_interval)
3257 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3258 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3259 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3260 NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3261 jiffies_to_msecs(jiffies - intbss->ts));
3262
3263 switch (rdev->wiphy.signal_type) {
3264 case CFG80211_SIGNAL_TYPE_MBM:
3265 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3266 break;
3267 case CFG80211_SIGNAL_TYPE_UNSPEC:
3268 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3269 break;
3270 default:
3271 break;
3272 }
3273
3274 switch (wdev->iftype) {
3275 case NL80211_IFTYPE_STATION:
3276 if (intbss == wdev->current_bss)
3277 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3278 NL80211_BSS_STATUS_ASSOCIATED);
3279 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3280 if (intbss != wdev->auth_bsses[i])
3281 continue;
3282 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3283 NL80211_BSS_STATUS_AUTHENTICATED);
3284 break;
3285 }
3286 break;
3287 case NL80211_IFTYPE_ADHOC:
3288 if (intbss == wdev->current_bss)
3289 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3290 NL80211_BSS_STATUS_IBSS_JOINED);
3291 break;
3292 default:
3293 break;
3294 }
3295
3296 nla_nest_end(msg, bss);
3297
3298 return genlmsg_end(msg, hdr);
3299
3300 nla_put_failure:
3301 genlmsg_cancel(msg, hdr);
3302 return -EMSGSIZE;
3303 }
3304
3305 static int nl80211_dump_scan(struct sk_buff *skb,
3306 struct netlink_callback *cb)
3307 {
3308 struct cfg80211_registered_device *rdev;
3309 struct net_device *dev;
3310 struct cfg80211_internal_bss *scan;
3311 struct wireless_dev *wdev;
3312 int ifidx = cb->args[0];
3313 int start = cb->args[1], idx = 0;
3314 int err;
3315
3316 if (!ifidx)
3317 ifidx = nl80211_get_ifidx(cb);
3318 if (ifidx < 0)
3319 return ifidx;
3320 cb->args[0] = ifidx;
3321
3322 dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3323 if (!dev)
3324 return -ENODEV;
3325
3326 rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3327 if (IS_ERR(rdev)) {
3328 err = PTR_ERR(rdev);
3329 goto out_put_netdev;
3330 }
3331
3332 wdev = dev->ieee80211_ptr;
3333
3334 wdev_lock(wdev);
3335 spin_lock_bh(&rdev->bss_lock);
3336 cfg80211_bss_expire(rdev);
3337
3338 list_for_each_entry(scan, &rdev->bss_list, list) {
3339 if (++idx <= start)
3340 continue;
3341 if (nl80211_send_bss(skb,
3342 NETLINK_CB(cb->skb).pid,
3343 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3344 rdev, wdev, scan) < 0) {
3345 idx--;
3346 goto out;
3347 }
3348 }
3349
3350 out:
3351 spin_unlock_bh(&rdev->bss_lock);
3352 wdev_unlock(wdev);
3353
3354 cb->args[1] = idx;
3355 err = skb->len;
3356 cfg80211_unlock_rdev(rdev);
3357 out_put_netdev:
3358 dev_put(dev);
3359
3360 return err;
3361 }
3362
3363 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3364 int flags, struct net_device *dev,
3365 struct survey_info *survey)
3366 {
3367 void *hdr;
3368 struct nlattr *infoattr;
3369
3370 /* Survey without a channel doesn't make sense */
3371 if (!survey->channel)
3372 return -EINVAL;
3373
3374 hdr = nl80211hdr_put(msg, pid, seq, flags,
3375 NL80211_CMD_NEW_SURVEY_RESULTS);
3376 if (!hdr)
3377 return -ENOMEM;
3378
3379 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3380
3381 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3382 if (!infoattr)
3383 goto nla_put_failure;
3384
3385 NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3386 survey->channel->center_freq);
3387 if (survey->filled & SURVEY_INFO_NOISE_DBM)
3388 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3389 survey->noise);
3390
3391 nla_nest_end(msg, infoattr);
3392
3393 return genlmsg_end(msg, hdr);
3394
3395 nla_put_failure:
3396 genlmsg_cancel(msg, hdr);
3397 return -EMSGSIZE;
3398 }
3399
3400 static int nl80211_dump_survey(struct sk_buff *skb,
3401 struct netlink_callback *cb)
3402 {
3403 struct survey_info survey;
3404 struct cfg80211_registered_device *dev;
3405 struct net_device *netdev;
3406 int ifidx = cb->args[0];
3407 int survey_idx = cb->args[1];
3408 int res;
3409
3410 if (!ifidx)
3411 ifidx = nl80211_get_ifidx(cb);
3412 if (ifidx < 0)
3413 return ifidx;
3414 cb->args[0] = ifidx;
3415
3416 rtnl_lock();
3417
3418 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
3419 if (!netdev) {
3420 res = -ENODEV;
3421 goto out_rtnl;
3422 }
3423
3424 dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3425 if (IS_ERR(dev)) {
3426 res = PTR_ERR(dev);
3427 goto out_rtnl;
3428 }
3429
3430 if (!dev->ops->dump_survey) {
3431 res = -EOPNOTSUPP;
3432 goto out_err;
3433 }
3434
3435 while (1) {
3436 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3437 &survey);
3438 if (res == -ENOENT)
3439 break;
3440 if (res)
3441 goto out_err;
3442
3443 if (nl80211_send_survey(skb,
3444 NETLINK_CB(cb->skb).pid,
3445 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3446 netdev,
3447 &survey) < 0)
3448 goto out;
3449 survey_idx++;
3450 }
3451
3452 out:
3453 cb->args[1] = survey_idx;
3454 res = skb->len;
3455 out_err:
3456 cfg80211_unlock_rdev(dev);
3457 out_rtnl:
3458 rtnl_unlock();
3459
3460 return res;
3461 }
3462
3463 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3464 {
3465 return auth_type <= NL80211_AUTHTYPE_MAX;
3466 }
3467
3468 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3469 {
3470 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3471 NL80211_WPA_VERSION_2));
3472 }
3473
3474 static bool nl80211_valid_akm_suite(u32 akm)
3475 {
3476 return akm == WLAN_AKM_SUITE_8021X ||
3477 akm == WLAN_AKM_SUITE_PSK;
3478 }
3479
3480 static bool nl80211_valid_cipher_suite(u32 cipher)
3481 {
3482 return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3483 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3484 cipher == WLAN_CIPHER_SUITE_TKIP ||
3485 cipher == WLAN_CIPHER_SUITE_CCMP ||
3486 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3487 }
3488
3489
3490 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3491 {
3492 struct cfg80211_registered_device *rdev;
3493 struct net_device *dev;
3494 struct ieee80211_channel *chan;
3495 const u8 *bssid, *ssid, *ie = NULL;
3496 int err, ssid_len, ie_len = 0;
3497 enum nl80211_auth_type auth_type;
3498 struct key_parse key;
3499 bool local_state_change;
3500
3501 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3502 return -EINVAL;
3503
3504 if (!info->attrs[NL80211_ATTR_MAC])
3505 return -EINVAL;
3506
3507 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3508 return -EINVAL;
3509
3510 if (!info->attrs[NL80211_ATTR_SSID])
3511 return -EINVAL;
3512
3513 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3514 return -EINVAL;
3515
3516 err = nl80211_parse_key(info, &key);
3517 if (err)
3518 return err;
3519
3520 if (key.idx >= 0) {
3521 if (!key.p.key || !key.p.key_len)
3522 return -EINVAL;
3523 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3524 key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3525 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3526 key.p.key_len != WLAN_KEY_LEN_WEP104))
3527 return -EINVAL;
3528 if (key.idx > 4)
3529 return -EINVAL;
3530 } else {
3531 key.p.key_len = 0;
3532 key.p.key = NULL;
3533 }
3534
3535 rtnl_lock();
3536
3537 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3538 if (err)
3539 goto unlock_rtnl;
3540
3541 if (!rdev->ops->auth) {
3542 err = -EOPNOTSUPP;
3543 goto out;
3544 }
3545
3546 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3547 err = -EOPNOTSUPP;
3548 goto out;
3549 }
3550
3551 if (!netif_running(dev)) {
3552 err = -ENETDOWN;
3553 goto out;
3554 }
3555
3556 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3557 chan = ieee80211_get_channel(&rdev->wiphy,
3558 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3559 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3560 err = -EINVAL;
3561 goto out;
3562 }
3563
3564 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3565 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3566
3567 if (info->attrs[NL80211_ATTR_IE]) {
3568 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3569 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3570 }
3571
3572 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3573 if (!nl80211_valid_auth_type(auth_type)) {
3574 err = -EINVAL;
3575 goto out;
3576 }
3577
3578 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3579
3580 err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3581 ssid, ssid_len, ie, ie_len,
3582 key.p.key, key.p.key_len, key.idx,
3583 local_state_change);
3584
3585 out:
3586 cfg80211_unlock_rdev(rdev);
3587 dev_put(dev);
3588 unlock_rtnl:
3589 rtnl_unlock();
3590 return err;
3591 }
3592
3593 static int nl80211_crypto_settings(struct genl_info *info,
3594 struct cfg80211_crypto_settings *settings,
3595 int cipher_limit)
3596 {
3597 memset(settings, 0, sizeof(*settings));
3598
3599 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3600
3601 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3602 void *data;
3603 int len, i;
3604
3605 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3606 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3607 settings->n_ciphers_pairwise = len / sizeof(u32);
3608
3609 if (len % sizeof(u32))
3610 return -EINVAL;
3611
3612 if (settings->n_ciphers_pairwise > cipher_limit)
3613 return -EINVAL;
3614
3615 memcpy(settings->ciphers_pairwise, data, len);
3616
3617 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3618 if (!nl80211_valid_cipher_suite(
3619 settings->ciphers_pairwise[i]))
3620 return -EINVAL;
3621 }
3622
3623 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3624 settings->cipher_group =
3625 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3626 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3627 return -EINVAL;
3628 }
3629
3630 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3631 settings->wpa_versions =
3632 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3633 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3634 return -EINVAL;
3635 }
3636
3637 if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3638 void *data;
3639 int len, i;
3640
3641 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3642 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3643 settings->n_akm_suites = len / sizeof(u32);
3644
3645 if (len % sizeof(u32))
3646 return -EINVAL;
3647
3648 memcpy(settings->akm_suites, data, len);
3649
3650 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3651 if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3652 return -EINVAL;
3653 }
3654
3655 return 0;
3656 }
3657
3658 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3659 {
3660 struct cfg80211_registered_device *rdev;
3661 struct net_device *dev;
3662 struct cfg80211_crypto_settings crypto;
3663 struct ieee80211_channel *chan;
3664 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3665 int err, ssid_len, ie_len = 0;
3666 bool use_mfp = false;
3667
3668 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3669 return -EINVAL;
3670
3671 if (!info->attrs[NL80211_ATTR_MAC] ||
3672 !info->attrs[NL80211_ATTR_SSID] ||
3673 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3674 return -EINVAL;
3675
3676 rtnl_lock();
3677
3678 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3679 if (err)
3680 goto unlock_rtnl;
3681
3682 if (!rdev->ops->assoc) {
3683 err = -EOPNOTSUPP;
3684 goto out;
3685 }
3686
3687 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3688 err = -EOPNOTSUPP;
3689 goto out;
3690 }
3691
3692 if (!netif_running(dev)) {
3693 err = -ENETDOWN;
3694 goto out;
3695 }
3696
3697 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3698
3699 chan = ieee80211_get_channel(&rdev->wiphy,
3700 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3701 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3702 err = -EINVAL;
3703 goto out;
3704 }
3705
3706 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3707 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3708
3709 if (info->attrs[NL80211_ATTR_IE]) {
3710 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3711 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3712 }
3713
3714 if (info->attrs[NL80211_ATTR_USE_MFP]) {
3715 enum nl80211_mfp mfp =
3716 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3717 if (mfp == NL80211_MFP_REQUIRED)
3718 use_mfp = true;
3719 else if (mfp != NL80211_MFP_NO) {
3720 err = -EINVAL;
3721 goto out;
3722 }
3723 }
3724
3725 if (info->attrs[NL80211_ATTR_PREV_BSSID])
3726 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3727
3728 err = nl80211_crypto_settings(info, &crypto, 1);
3729 if (!err)
3730 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3731 ssid, ssid_len, ie, ie_len, use_mfp,
3732 &crypto);
3733
3734 out:
3735 cfg80211_unlock_rdev(rdev);
3736 dev_put(dev);
3737 unlock_rtnl:
3738 rtnl_unlock();
3739 return err;
3740 }
3741
3742 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3743 {
3744 struct cfg80211_registered_device *rdev;
3745 struct net_device *dev;
3746 const u8 *ie = NULL, *bssid;
3747 int err, ie_len = 0;
3748 u16 reason_code;
3749 bool local_state_change;
3750
3751 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3752 return -EINVAL;
3753
3754 if (!info->attrs[NL80211_ATTR_MAC])
3755 return -EINVAL;
3756
3757 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3758 return -EINVAL;
3759
3760 rtnl_lock();
3761
3762 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3763 if (err)
3764 goto unlock_rtnl;
3765
3766 if (!rdev->ops->deauth) {
3767 err = -EOPNOTSUPP;
3768 goto out;
3769 }
3770
3771 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3772 err = -EOPNOTSUPP;
3773 goto out;
3774 }
3775
3776 if (!netif_running(dev)) {
3777 err = -ENETDOWN;
3778 goto out;
3779 }
3780
3781 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3782
3783 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3784 if (reason_code == 0) {
3785 /* Reason Code 0 is reserved */
3786 err = -EINVAL;
3787 goto out;
3788 }
3789
3790 if (info->attrs[NL80211_ATTR_IE]) {
3791 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3792 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3793 }
3794
3795 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3796
3797 err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3798 local_state_change);
3799
3800 out:
3801 cfg80211_unlock_rdev(rdev);
3802 dev_put(dev);
3803 unlock_rtnl:
3804 rtnl_unlock();
3805 return err;
3806 }
3807
3808 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3809 {
3810 struct cfg80211_registered_device *rdev;
3811 struct net_device *dev;
3812 const u8 *ie = NULL, *bssid;
3813 int err, ie_len = 0;
3814 u16 reason_code;
3815 bool local_state_change;
3816
3817 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3818 return -EINVAL;
3819
3820 if (!info->attrs[NL80211_ATTR_MAC])
3821 return -EINVAL;
3822
3823 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3824 return -EINVAL;
3825
3826 rtnl_lock();
3827
3828 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3829 if (err)
3830 goto unlock_rtnl;
3831
3832 if (!rdev->ops->disassoc) {
3833 err = -EOPNOTSUPP;
3834 goto out;
3835 }
3836
3837 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3838 err = -EOPNOTSUPP;
3839 goto out;
3840 }
3841
3842 if (!netif_running(dev)) {
3843 err = -ENETDOWN;
3844 goto out;
3845 }
3846
3847 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3848
3849 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3850 if (reason_code == 0) {
3851 /* Reason Code 0 is reserved */
3852 err = -EINVAL;
3853 goto out;
3854 }
3855
3856 if (info->attrs[NL80211_ATTR_IE]) {
3857 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3858 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3859 }
3860
3861 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3862
3863 err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3864 local_state_change);
3865
3866 out:
3867 cfg80211_unlock_rdev(rdev);
3868 dev_put(dev);
3869 unlock_rtnl:
3870 rtnl_unlock();
3871 return err;
3872 }
3873
3874 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3875 {
3876 struct cfg80211_registered_device *rdev;
3877 struct net_device *dev;
3878 struct cfg80211_ibss_params ibss;
3879 struct wiphy *wiphy;
3880 struct cfg80211_cached_keys *connkeys = NULL;
3881 int err;
3882
3883 memset(&ibss, 0, sizeof(ibss));
3884
3885 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3886 return -EINVAL;
3887
3888 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3889 !info->attrs[NL80211_ATTR_SSID] ||
3890 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3891 return -EINVAL;
3892
3893 ibss.beacon_interval = 100;
3894
3895 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3896 ibss.beacon_interval =
3897 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3898 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3899 return -EINVAL;
3900 }
3901
3902 rtnl_lock();
3903
3904 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3905 if (err)
3906 goto unlock_rtnl;
3907
3908 if (!rdev->ops->join_ibss) {
3909 err = -EOPNOTSUPP;
3910 goto out;
3911 }
3912
3913 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3914 err = -EOPNOTSUPP;
3915 goto out;
3916 }
3917
3918 if (!netif_running(dev)) {
3919 err = -ENETDOWN;
3920 goto out;
3921 }
3922
3923 wiphy = &rdev->wiphy;
3924
3925 if (info->attrs[NL80211_ATTR_MAC])
3926 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3927 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3928 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3929
3930 if (info->attrs[NL80211_ATTR_IE]) {
3931 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3932 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3933 }
3934
3935 ibss.channel = ieee80211_get_channel(wiphy,
3936 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3937 if (!ibss.channel ||
3938 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3939 ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3940 err = -EINVAL;
3941 goto out;
3942 }
3943
3944 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3945 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3946
3947 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3948 connkeys = nl80211_parse_connkeys(rdev,
3949 info->attrs[NL80211_ATTR_KEYS]);
3950 if (IS_ERR(connkeys)) {
3951 err = PTR_ERR(connkeys);
3952 connkeys = NULL;
3953 goto out;
3954 }
3955 }
3956
3957 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3958
3959 out:
3960 cfg80211_unlock_rdev(rdev);
3961 dev_put(dev);
3962 unlock_rtnl:
3963 if (err)
3964 kfree(connkeys);
3965 rtnl_unlock();
3966 return err;
3967 }
3968
3969 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3970 {
3971 struct cfg80211_registered_device *rdev;
3972 struct net_device *dev;
3973 int err;
3974
3975 rtnl_lock();
3976
3977 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3978 if (err)
3979 goto unlock_rtnl;
3980
3981 if (!rdev->ops->leave_ibss) {
3982 err = -EOPNOTSUPP;
3983 goto out;
3984 }
3985
3986 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3987 err = -EOPNOTSUPP;
3988 goto out;
3989 }
3990
3991 if (!netif_running(dev)) {
3992 err = -ENETDOWN;
3993 goto out;
3994 }
3995
3996 err = cfg80211_leave_ibss(rdev, dev, false);
3997
3998 out:
3999 cfg80211_unlock_rdev(rdev);
4000 dev_put(dev);
4001 unlock_rtnl:
4002 rtnl_unlock();
4003 return err;
4004 }
4005
4006 #ifdef CONFIG_NL80211_TESTMODE
4007 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4008 .name = "testmode",
4009 };
4010
4011 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4012 {
4013 struct cfg80211_registered_device *rdev;
4014 int err;
4015
4016 if (!info->attrs[NL80211_ATTR_TESTDATA])
4017 return -EINVAL;
4018
4019 rtnl_lock();
4020
4021 rdev = cfg80211_get_dev_from_info(info);
4022 if (IS_ERR(rdev)) {
4023 err = PTR_ERR(rdev);
4024 goto unlock_rtnl;
4025 }
4026
4027 err = -EOPNOTSUPP;
4028 if (rdev->ops->testmode_cmd) {
4029 rdev->testmode_info = info;
4030 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4031 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4032 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4033 rdev->testmode_info = NULL;
4034 }
4035
4036 cfg80211_unlock_rdev(rdev);
4037
4038 unlock_rtnl:
4039 rtnl_unlock();
4040 return err;
4041 }
4042
4043 static struct sk_buff *
4044 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4045 int approxlen, u32 pid, u32 seq, gfp_t gfp)
4046 {
4047 struct sk_buff *skb;
4048 void *hdr;
4049 struct nlattr *data;
4050
4051 skb = nlmsg_new(approxlen + 100, gfp);
4052 if (!skb)
4053 return NULL;
4054
4055 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4056 if (!hdr) {
4057 kfree_skb(skb);
4058 return NULL;
4059 }
4060
4061 NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4062 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4063
4064 ((void **)skb->cb)[0] = rdev;
4065 ((void **)skb->cb)[1] = hdr;
4066 ((void **)skb->cb)[2] = data;
4067
4068 return skb;
4069
4070 nla_put_failure:
4071 kfree_skb(skb);
4072 return NULL;
4073 }
4074
4075 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4076 int approxlen)
4077 {
4078 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4079
4080 if (WARN_ON(!rdev->testmode_info))
4081 return NULL;
4082
4083 return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4084 rdev->testmode_info->snd_pid,
4085 rdev->testmode_info->snd_seq,
4086 GFP_KERNEL);
4087 }
4088 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4089
4090 int cfg80211_testmode_reply(struct sk_buff *skb)
4091 {
4092 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4093 void *hdr = ((void **)skb->cb)[1];
4094 struct nlattr *data = ((void **)skb->cb)[2];
4095
4096 if (WARN_ON(!rdev->testmode_info)) {
4097 kfree_skb(skb);
4098 return -EINVAL;
4099 }
4100
4101 nla_nest_end(skb, data);
4102 genlmsg_end(skb, hdr);
4103 return genlmsg_reply(skb, rdev->testmode_info);
4104 }
4105 EXPORT_SYMBOL(cfg80211_testmode_reply);
4106
4107 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4108 int approxlen, gfp_t gfp)
4109 {
4110 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4111
4112 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4113 }
4114 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4115
4116 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4117 {
4118 void *hdr = ((void **)skb->cb)[1];
4119 struct nlattr *data = ((void **)skb->cb)[2];
4120
4121 nla_nest_end(skb, data);
4122 genlmsg_end(skb, hdr);
4123 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4124 }
4125 EXPORT_SYMBOL(cfg80211_testmode_event);
4126 #endif
4127
4128 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4129 {
4130 struct cfg80211_registered_device *rdev;
4131 struct net_device *dev;
4132 struct cfg80211_connect_params connect;
4133 struct wiphy *wiphy;
4134 struct cfg80211_cached_keys *connkeys = NULL;
4135 int err;
4136
4137 memset(&connect, 0, sizeof(connect));
4138
4139 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4140 return -EINVAL;
4141
4142 if (!info->attrs[NL80211_ATTR_SSID] ||
4143 !nla_len(info->attrs[NL80211_ATTR_SSID]))
4144 return -EINVAL;
4145
4146 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4147 connect.auth_type =
4148 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4149 if (!nl80211_valid_auth_type(connect.auth_type))
4150 return -EINVAL;
4151 } else
4152 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4153
4154 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4155
4156 err = nl80211_crypto_settings(info, &connect.crypto,
4157 NL80211_MAX_NR_CIPHER_SUITES);
4158 if (err)
4159 return err;
4160 rtnl_lock();
4161
4162 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4163 if (err)
4164 goto unlock_rtnl;
4165
4166 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4167 err = -EOPNOTSUPP;
4168 goto out;
4169 }
4170
4171 if (!netif_running(dev)) {
4172 err = -ENETDOWN;
4173 goto out;
4174 }
4175
4176 wiphy = &rdev->wiphy;
4177
4178 if (info->attrs[NL80211_ATTR_MAC])
4179 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4180 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4181 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4182
4183 if (info->attrs[NL80211_ATTR_IE]) {
4184 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4185 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4186 }
4187
4188 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4189 connect.channel =
4190 ieee80211_get_channel(wiphy,
4191 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4192 if (!connect.channel ||
4193 connect.channel->flags & IEEE80211_CHAN_DISABLED) {
4194 err = -EINVAL;
4195 goto out;
4196 }
4197 }
4198
4199 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4200 connkeys = nl80211_parse_connkeys(rdev,
4201 info->attrs[NL80211_ATTR_KEYS]);
4202 if (IS_ERR(connkeys)) {
4203 err = PTR_ERR(connkeys);
4204 connkeys = NULL;
4205 goto out;
4206 }
4207 }
4208
4209 err = cfg80211_connect(rdev, dev, &connect, connkeys);
4210
4211 out:
4212 cfg80211_unlock_rdev(rdev);
4213 dev_put(dev);
4214 unlock_rtnl:
4215 if (err)
4216 kfree(connkeys);
4217 rtnl_unlock();
4218 return err;
4219 }
4220
4221 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4222 {
4223 struct cfg80211_registered_device *rdev;
4224 struct net_device *dev;
4225 int err;
4226 u16 reason;
4227
4228 if (!info->attrs[NL80211_ATTR_REASON_CODE])
4229 reason = WLAN_REASON_DEAUTH_LEAVING;
4230 else
4231 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4232
4233 if (reason == 0)
4234 return -EINVAL;
4235
4236 rtnl_lock();
4237
4238 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4239 if (err)
4240 goto unlock_rtnl;
4241
4242 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4243 err = -EOPNOTSUPP;
4244 goto out;
4245 }
4246
4247 if (!netif_running(dev)) {
4248 err = -ENETDOWN;
4249 goto out;
4250 }
4251
4252 err = cfg80211_disconnect(rdev, dev, reason, true);
4253
4254 out:
4255 cfg80211_unlock_rdev(rdev);
4256 dev_put(dev);
4257 unlock_rtnl:
4258 rtnl_unlock();
4259 return err;
4260 }
4261
4262 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4263 {
4264 struct cfg80211_registered_device *rdev;
4265 struct net *net;
4266 int err;
4267 u32 pid;
4268
4269 if (!info->attrs[NL80211_ATTR_PID])
4270 return -EINVAL;
4271
4272 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4273
4274 rtnl_lock();
4275
4276 rdev = cfg80211_get_dev_from_info(info);
4277 if (IS_ERR(rdev)) {
4278 err = PTR_ERR(rdev);
4279 goto out_rtnl;
4280 }
4281
4282 net = get_net_ns_by_pid(pid);
4283 if (IS_ERR(net)) {
4284 err = PTR_ERR(net);
4285 goto out;
4286 }
4287
4288 err = 0;
4289
4290 /* check if anything to do */
4291 if (net_eq(wiphy_net(&rdev->wiphy), net))
4292 goto out_put_net;
4293
4294 err = cfg80211_switch_netns(rdev, net);
4295 out_put_net:
4296 put_net(net);
4297 out:
4298 cfg80211_unlock_rdev(rdev);
4299 out_rtnl:
4300 rtnl_unlock();
4301 return err;
4302 }
4303
4304 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4305 {
4306 struct cfg80211_registered_device *rdev;
4307 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4308 struct cfg80211_pmksa *pmksa) = NULL;
4309 int err;
4310 struct net_device *dev;
4311 struct cfg80211_pmksa pmksa;
4312
4313 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4314
4315 if (!info->attrs[NL80211_ATTR_MAC])
4316 return -EINVAL;
4317
4318 if (!info->attrs[NL80211_ATTR_PMKID])
4319 return -EINVAL;
4320
4321 rtnl_lock();
4322
4323 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4324 if (err)
4325 goto out_rtnl;
4326
4327 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4328 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4329
4330 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4331 err = -EOPNOTSUPP;
4332 goto out;
4333 }
4334
4335 switch (info->genlhdr->cmd) {
4336 case NL80211_CMD_SET_PMKSA:
4337 rdev_ops = rdev->ops->set_pmksa;
4338 break;
4339 case NL80211_CMD_DEL_PMKSA:
4340 rdev_ops = rdev->ops->del_pmksa;
4341 break;
4342 default:
4343 WARN_ON(1);
4344 break;
4345 }
4346
4347 if (!rdev_ops) {
4348 err = -EOPNOTSUPP;
4349 goto out;
4350 }
4351
4352 err = rdev_ops(&rdev->wiphy, dev, &pmksa);
4353
4354 out:
4355 cfg80211_unlock_rdev(rdev);
4356 dev_put(dev);
4357 out_rtnl:
4358 rtnl_unlock();
4359
4360 return err;
4361 }
4362
4363 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4364 {
4365 struct cfg80211_registered_device *rdev;
4366 int err;
4367 struct net_device *dev;
4368
4369 rtnl_lock();
4370
4371 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4372 if (err)
4373 goto out_rtnl;
4374
4375 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4376 err = -EOPNOTSUPP;
4377 goto out;
4378 }
4379
4380 if (!rdev->ops->flush_pmksa) {
4381 err = -EOPNOTSUPP;
4382 goto out;
4383 }
4384
4385 err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4386
4387 out:
4388 cfg80211_unlock_rdev(rdev);
4389 dev_put(dev);
4390 out_rtnl:
4391 rtnl_unlock();
4392
4393 return err;
4394
4395 }
4396
4397 static int nl80211_remain_on_channel(struct sk_buff *skb,
4398 struct genl_info *info)
4399 {
4400 struct cfg80211_registered_device *rdev;
4401 struct net_device *dev;
4402 struct ieee80211_channel *chan;
4403 struct sk_buff *msg;
4404 void *hdr;
4405 u64 cookie;
4406 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4407 u32 freq, duration;
4408 int err;
4409
4410 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4411 !info->attrs[NL80211_ATTR_DURATION])
4412 return -EINVAL;
4413
4414 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4415
4416 /*
4417 * We should be on that channel for at least one jiffie,
4418 * and more than 5 seconds seems excessive.
4419 */
4420 if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4421 return -EINVAL;
4422
4423 rtnl_lock();
4424
4425 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4426 if (err)
4427 goto unlock_rtnl;
4428
4429 if (!rdev->ops->remain_on_channel) {
4430 err = -EOPNOTSUPP;
4431 goto out;
4432 }
4433
4434 if (!netif_running(dev)) {
4435 err = -ENETDOWN;
4436 goto out;
4437 }
4438
4439 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4440 channel_type = nla_get_u32(
4441 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4442 if (channel_type != NL80211_CHAN_NO_HT &&
4443 channel_type != NL80211_CHAN_HT20 &&
4444 channel_type != NL80211_CHAN_HT40PLUS &&
4445 channel_type != NL80211_CHAN_HT40MINUS)
4446 err = -EINVAL;
4447 goto out;
4448 }
4449
4450 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4451 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4452 if (chan == NULL) {
4453 err = -EINVAL;
4454 goto out;
4455 }
4456
4457 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4458 if (!msg) {
4459 err = -ENOMEM;
4460 goto out;
4461 }
4462
4463 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4464 NL80211_CMD_REMAIN_ON_CHANNEL);
4465
4466 if (IS_ERR(hdr)) {
4467 err = PTR_ERR(hdr);
4468 goto free_msg;
4469 }
4470
4471 err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4472 channel_type, duration, &cookie);
4473
4474 if (err)
4475 goto free_msg;
4476
4477 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4478
4479 genlmsg_end(msg, hdr);
4480 err = genlmsg_reply(msg, info);
4481 goto out;
4482
4483 nla_put_failure:
4484 err = -ENOBUFS;
4485 free_msg:
4486 nlmsg_free(msg);
4487 out:
4488 cfg80211_unlock_rdev(rdev);
4489 dev_put(dev);
4490 unlock_rtnl:
4491 rtnl_unlock();
4492 return err;
4493 }
4494
4495 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4496 struct genl_info *info)
4497 {
4498 struct cfg80211_registered_device *rdev;
4499 struct net_device *dev;
4500 u64 cookie;
4501 int err;
4502
4503 if (!info->attrs[NL80211_ATTR_COOKIE])
4504 return -EINVAL;
4505
4506 rtnl_lock();
4507
4508 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4509 if (err)
4510 goto unlock_rtnl;
4511
4512 if (!rdev->ops->cancel_remain_on_channel) {
4513 err = -EOPNOTSUPP;
4514 goto out;
4515 }
4516
4517 if (!netif_running(dev)) {
4518 err = -ENETDOWN;
4519 goto out;
4520 }
4521
4522 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4523
4524 err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4525
4526 out:
4527 cfg80211_unlock_rdev(rdev);
4528 dev_put(dev);
4529 unlock_rtnl:
4530 rtnl_unlock();
4531 return err;
4532 }
4533
4534 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4535 u8 *rates, u8 rates_len)
4536 {
4537 u8 i;
4538 u32 mask = 0;
4539
4540 for (i = 0; i < rates_len; i++) {
4541 int rate = (rates[i] & 0x7f) * 5;
4542 int ridx;
4543 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4544 struct ieee80211_rate *srate =
4545 &sband->bitrates[ridx];
4546 if (rate == srate->bitrate) {
4547 mask |= 1 << ridx;
4548 break;
4549 }
4550 }
4551 if (ridx == sband->n_bitrates)
4552 return 0; /* rate not found */
4553 }
4554
4555 return mask;
4556 }
4557
4558 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4559 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4560 .len = NL80211_MAX_SUPP_RATES },
4561 };
4562
4563 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4564 struct genl_info *info)
4565 {
4566 struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4567 struct cfg80211_registered_device *rdev;
4568 struct cfg80211_bitrate_mask mask;
4569 int err, rem, i;
4570 struct net_device *dev;
4571 struct nlattr *tx_rates;
4572 struct ieee80211_supported_band *sband;
4573
4574 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4575 return -EINVAL;
4576
4577 rtnl_lock();
4578
4579 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4580 if (err)
4581 goto unlock_rtnl;
4582
4583 if (!rdev->ops->set_bitrate_mask) {
4584 err = -EOPNOTSUPP;
4585 goto unlock;
4586 }
4587
4588 memset(&mask, 0, sizeof(mask));
4589 /* Default to all rates enabled */
4590 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4591 sband = rdev->wiphy.bands[i];
4592 mask.control[i].legacy =
4593 sband ? (1 << sband->n_bitrates) - 1 : 0;
4594 }
4595
4596 /*
4597 * The nested attribute uses enum nl80211_band as the index. This maps
4598 * directly to the enum ieee80211_band values used in cfg80211.
4599 */
4600 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4601 {
4602 enum ieee80211_band band = nla_type(tx_rates);
4603 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4604 err = -EINVAL;
4605 goto unlock;
4606 }
4607 sband = rdev->wiphy.bands[band];
4608 if (sband == NULL) {
4609 err = -EINVAL;
4610 goto unlock;
4611 }
4612 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4613 nla_len(tx_rates), nl80211_txattr_policy);
4614 if (tb[NL80211_TXRATE_LEGACY]) {
4615 mask.control[band].legacy = rateset_to_mask(
4616 sband,
4617 nla_data(tb[NL80211_TXRATE_LEGACY]),
4618 nla_len(tb[NL80211_TXRATE_LEGACY]));
4619 if (mask.control[band].legacy == 0) {
4620 err = -EINVAL;
4621 goto unlock;
4622 }
4623 }
4624 }
4625
4626 err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4627
4628 unlock:
4629 dev_put(dev);
4630 cfg80211_unlock_rdev(rdev);
4631 unlock_rtnl:
4632 rtnl_unlock();
4633 return err;
4634 }
4635
4636 static int nl80211_register_action(struct sk_buff *skb, struct genl_info *info)
4637 {
4638 struct cfg80211_registered_device *rdev;
4639 struct net_device *dev;
4640 int err;
4641
4642 if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4643 return -EINVAL;
4644
4645 if (nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]) < 1)
4646 return -EINVAL;
4647
4648 rtnl_lock();
4649
4650 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4651 if (err)
4652 goto unlock_rtnl;
4653
4654 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4655 err = -EOPNOTSUPP;
4656 goto out;
4657 }
4658
4659 /* not much point in registering if we can't reply */
4660 if (!rdev->ops->action) {
4661 err = -EOPNOTSUPP;
4662 goto out;
4663 }
4664
4665 err = cfg80211_mlme_register_action(dev->ieee80211_ptr, info->snd_pid,
4666 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4667 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4668 out:
4669 cfg80211_unlock_rdev(rdev);
4670 dev_put(dev);
4671 unlock_rtnl:
4672 rtnl_unlock();
4673 return err;
4674 }
4675
4676 static int nl80211_action(struct sk_buff *skb, struct genl_info *info)
4677 {
4678 struct cfg80211_registered_device *rdev;
4679 struct net_device *dev;
4680 struct ieee80211_channel *chan;
4681 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4682 u32 freq;
4683 int err;
4684 void *hdr;
4685 u64 cookie;
4686 struct sk_buff *msg;
4687
4688 if (!info->attrs[NL80211_ATTR_FRAME] ||
4689 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4690 return -EINVAL;
4691
4692 rtnl_lock();
4693
4694 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4695 if (err)
4696 goto unlock_rtnl;
4697
4698 if (!rdev->ops->action) {
4699 err = -EOPNOTSUPP;
4700 goto out;
4701 }
4702
4703 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4704 err = -EOPNOTSUPP;
4705 goto out;
4706 }
4707
4708 if (!netif_running(dev)) {
4709 err = -ENETDOWN;
4710 goto out;
4711 }
4712
4713 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4714 channel_type = nla_get_u32(
4715 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4716 if (channel_type != NL80211_CHAN_NO_HT &&
4717 channel_type != NL80211_CHAN_HT20 &&
4718 channel_type != NL80211_CHAN_HT40PLUS &&
4719 channel_type != NL80211_CHAN_HT40MINUS)
4720 err = -EINVAL;
4721 goto out;
4722 }
4723
4724 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4725 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4726 if (chan == NULL) {
4727 err = -EINVAL;
4728 goto out;
4729 }
4730
4731 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4732 if (!msg) {
4733 err = -ENOMEM;
4734 goto out;
4735 }
4736
4737 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4738 NL80211_CMD_ACTION);
4739
4740 if (IS_ERR(hdr)) {
4741 err = PTR_ERR(hdr);
4742 goto free_msg;
4743 }
4744 err = cfg80211_mlme_action(rdev, dev, chan, channel_type,
4745 nla_data(info->attrs[NL80211_ATTR_FRAME]),
4746 nla_len(info->attrs[NL80211_ATTR_FRAME]),
4747 &cookie);
4748 if (err)
4749 goto free_msg;
4750
4751 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4752
4753 genlmsg_end(msg, hdr);
4754 err = genlmsg_reply(msg, info);
4755 goto out;
4756
4757 nla_put_failure:
4758 err = -ENOBUFS;
4759 free_msg:
4760 nlmsg_free(msg);
4761 out:
4762 cfg80211_unlock_rdev(rdev);
4763 dev_put(dev);
4764 unlock_rtnl:
4765 rtnl_unlock();
4766 return err;
4767 }
4768
4769 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4770 {
4771 struct cfg80211_registered_device *rdev;
4772 struct wireless_dev *wdev;
4773 struct net_device *dev;
4774 u8 ps_state;
4775 bool state;
4776 int err;
4777
4778 if (!info->attrs[NL80211_ATTR_PS_STATE]) {
4779 err = -EINVAL;
4780 goto out;
4781 }
4782
4783 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4784
4785 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) {
4786 err = -EINVAL;
4787 goto out;
4788 }
4789
4790 rtnl_lock();
4791
4792 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4793 if (err)
4794 goto unlock_rdev;
4795
4796 wdev = dev->ieee80211_ptr;
4797
4798 if (!rdev->ops->set_power_mgmt) {
4799 err = -EOPNOTSUPP;
4800 goto unlock_rdev;
4801 }
4802
4803 state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4804
4805 if (state == wdev->ps)
4806 goto unlock_rdev;
4807
4808 wdev->ps = state;
4809
4810 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, wdev->ps,
4811 wdev->ps_timeout))
4812 /* assume this means it's off */
4813 wdev->ps = false;
4814
4815 unlock_rdev:
4816 cfg80211_unlock_rdev(rdev);
4817 dev_put(dev);
4818 rtnl_unlock();
4819
4820 out:
4821 return err;
4822 }
4823
4824 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4825 {
4826 struct cfg80211_registered_device *rdev;
4827 enum nl80211_ps_state ps_state;
4828 struct wireless_dev *wdev;
4829 struct net_device *dev;
4830 struct sk_buff *msg;
4831 void *hdr;
4832 int err;
4833
4834 rtnl_lock();
4835
4836 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4837 if (err)
4838 goto unlock_rtnl;
4839
4840 wdev = dev->ieee80211_ptr;
4841
4842 if (!rdev->ops->set_power_mgmt) {
4843 err = -EOPNOTSUPP;
4844 goto out;
4845 }
4846
4847 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4848 if (!msg) {
4849 err = -ENOMEM;
4850 goto out;
4851 }
4852
4853 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4854 NL80211_CMD_GET_POWER_SAVE);
4855 if (!hdr) {
4856 err = -ENOMEM;
4857 goto free_msg;
4858 }
4859
4860 if (wdev->ps)
4861 ps_state = NL80211_PS_ENABLED;
4862 else
4863 ps_state = NL80211_PS_DISABLED;
4864
4865 NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4866
4867 genlmsg_end(msg, hdr);
4868 err = genlmsg_reply(msg, info);
4869 goto out;
4870
4871 nla_put_failure:
4872 err = -ENOBUFS;
4873
4874 free_msg:
4875 nlmsg_free(msg);
4876
4877 out:
4878 cfg80211_unlock_rdev(rdev);
4879 dev_put(dev);
4880
4881 unlock_rtnl:
4882 rtnl_unlock();
4883
4884 return err;
4885 }
4886
4887 static struct nla_policy
4888 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4889 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4890 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4891 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4892 };
4893
4894 static int nl80211_set_cqm_rssi(struct genl_info *info,
4895 s32 threshold, u32 hysteresis)
4896 {
4897 struct cfg80211_registered_device *rdev;
4898 struct wireless_dev *wdev;
4899 struct net_device *dev;
4900 int err;
4901
4902 if (threshold > 0)
4903 return -EINVAL;
4904
4905 rtnl_lock();
4906
4907 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4908 if (err)
4909 goto unlock_rdev;
4910
4911 wdev = dev->ieee80211_ptr;
4912
4913 if (!rdev->ops->set_cqm_rssi_config) {
4914 err = -EOPNOTSUPP;
4915 goto unlock_rdev;
4916 }
4917
4918 if (wdev->iftype != NL80211_IFTYPE_STATION) {
4919 err = -EOPNOTSUPP;
4920 goto unlock_rdev;
4921 }
4922
4923 err = rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4924 threshold, hysteresis);
4925
4926 unlock_rdev:
4927 cfg80211_unlock_rdev(rdev);
4928 dev_put(dev);
4929 rtnl_unlock();
4930
4931 return err;
4932 }
4933
4934 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4935 {
4936 struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4937 struct nlattr *cqm;
4938 int err;
4939
4940 cqm = info->attrs[NL80211_ATTR_CQM];
4941 if (!cqm) {
4942 err = -EINVAL;
4943 goto out;
4944 }
4945
4946 err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4947 nl80211_attr_cqm_policy);
4948 if (err)
4949 goto out;
4950
4951 if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4952 attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4953 s32 threshold;
4954 u32 hysteresis;
4955 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4956 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4957 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4958 } else
4959 err = -EINVAL;
4960
4961 out:
4962 return err;
4963 }
4964
4965 static struct genl_ops nl80211_ops[] = {
4966 {
4967 .cmd = NL80211_CMD_GET_WIPHY,
4968 .doit = nl80211_get_wiphy,
4969 .dumpit = nl80211_dump_wiphy,
4970 .policy = nl80211_policy,
4971 /* can be retrieved by unprivileged users */
4972 },
4973 {
4974 .cmd = NL80211_CMD_SET_WIPHY,
4975 .doit = nl80211_set_wiphy,
4976 .policy = nl80211_policy,
4977 .flags = GENL_ADMIN_PERM,
4978 },
4979 {
4980 .cmd = NL80211_CMD_GET_INTERFACE,
4981 .doit = nl80211_get_interface,
4982 .dumpit = nl80211_dump_interface,
4983 .policy = nl80211_policy,
4984 /* can be retrieved by unprivileged users */
4985 },
4986 {
4987 .cmd = NL80211_CMD_SET_INTERFACE,
4988 .doit = nl80211_set_interface,
4989 .policy = nl80211_policy,
4990 .flags = GENL_ADMIN_PERM,
4991 },
4992 {
4993 .cmd = NL80211_CMD_NEW_INTERFACE,
4994 .doit = nl80211_new_interface,
4995 .policy = nl80211_policy,
4996 .flags = GENL_ADMIN_PERM,
4997 },
4998 {
4999 .cmd = NL80211_CMD_DEL_INTERFACE,
5000 .doit = nl80211_del_interface,
5001 .policy = nl80211_policy,
5002 .flags = GENL_ADMIN_PERM,
5003 },
5004 {
5005 .cmd = NL80211_CMD_GET_KEY,
5006 .doit = nl80211_get_key,
5007 .policy = nl80211_policy,
5008 .flags = GENL_ADMIN_PERM,
5009 },
5010 {
5011 .cmd = NL80211_CMD_SET_KEY,
5012 .doit = nl80211_set_key,
5013 .policy = nl80211_policy,
5014 .flags = GENL_ADMIN_PERM,
5015 },
5016 {
5017 .cmd = NL80211_CMD_NEW_KEY,
5018 .doit = nl80211_new_key,
5019 .policy = nl80211_policy,
5020 .flags = GENL_ADMIN_PERM,
5021 },
5022 {
5023 .cmd = NL80211_CMD_DEL_KEY,
5024 .doit = nl80211_del_key,
5025 .policy = nl80211_policy,
5026 .flags = GENL_ADMIN_PERM,
5027 },
5028 {
5029 .cmd = NL80211_CMD_SET_BEACON,
5030 .policy = nl80211_policy,
5031 .flags = GENL_ADMIN_PERM,
5032 .doit = nl80211_addset_beacon,
5033 },
5034 {
5035 .cmd = NL80211_CMD_NEW_BEACON,
5036 .policy = nl80211_policy,
5037 .flags = GENL_ADMIN_PERM,
5038 .doit = nl80211_addset_beacon,
5039 },
5040 {
5041 .cmd = NL80211_CMD_DEL_BEACON,
5042 .policy = nl80211_policy,
5043 .flags = GENL_ADMIN_PERM,
5044 .doit = nl80211_del_beacon,
5045 },
5046 {
5047 .cmd = NL80211_CMD_GET_STATION,
5048 .doit = nl80211_get_station,
5049 .dumpit = nl80211_dump_station,
5050 .policy = nl80211_policy,
5051 },
5052 {
5053 .cmd = NL80211_CMD_SET_STATION,
5054 .doit = nl80211_set_station,
5055 .policy = nl80211_policy,
5056 .flags = GENL_ADMIN_PERM,
5057 },
5058 {
5059 .cmd = NL80211_CMD_NEW_STATION,
5060 .doit = nl80211_new_station,
5061 .policy = nl80211_policy,
5062 .flags = GENL_ADMIN_PERM,
5063 },
5064 {
5065 .cmd = NL80211_CMD_DEL_STATION,
5066 .doit = nl80211_del_station,
5067 .policy = nl80211_policy,
5068 .flags = GENL_ADMIN_PERM,
5069 },
5070 {
5071 .cmd = NL80211_CMD_GET_MPATH,
5072 .doit = nl80211_get_mpath,
5073 .dumpit = nl80211_dump_mpath,
5074 .policy = nl80211_policy,
5075 .flags = GENL_ADMIN_PERM,
5076 },
5077 {
5078 .cmd = NL80211_CMD_SET_MPATH,
5079 .doit = nl80211_set_mpath,
5080 .policy = nl80211_policy,
5081 .flags = GENL_ADMIN_PERM,
5082 },
5083 {
5084 .cmd = NL80211_CMD_NEW_MPATH,
5085 .doit = nl80211_new_mpath,
5086 .policy = nl80211_policy,
5087 .flags = GENL_ADMIN_PERM,
5088 },
5089 {
5090 .cmd = NL80211_CMD_DEL_MPATH,
5091 .doit = nl80211_del_mpath,
5092 .policy = nl80211_policy,
5093 .flags = GENL_ADMIN_PERM,
5094 },
5095 {
5096 .cmd = NL80211_CMD_SET_BSS,
5097 .doit = nl80211_set_bss,
5098 .policy = nl80211_policy,
5099 .flags = GENL_ADMIN_PERM,
5100 },
5101 {
5102 .cmd = NL80211_CMD_GET_REG,
5103 .doit = nl80211_get_reg,
5104 .policy = nl80211_policy,
5105 /* can be retrieved by unprivileged users */
5106 },
5107 {
5108 .cmd = NL80211_CMD_SET_REG,
5109 .doit = nl80211_set_reg,
5110 .policy = nl80211_policy,
5111 .flags = GENL_ADMIN_PERM,
5112 },
5113 {
5114 .cmd = NL80211_CMD_REQ_SET_REG,
5115 .doit = nl80211_req_set_reg,
5116 .policy = nl80211_policy,
5117 .flags = GENL_ADMIN_PERM,
5118 },
5119 {
5120 .cmd = NL80211_CMD_GET_MESH_PARAMS,
5121 .doit = nl80211_get_mesh_params,
5122 .policy = nl80211_policy,
5123 /* can be retrieved by unprivileged users */
5124 },
5125 {
5126 .cmd = NL80211_CMD_SET_MESH_PARAMS,
5127 .doit = nl80211_set_mesh_params,
5128 .policy = nl80211_policy,
5129 .flags = GENL_ADMIN_PERM,
5130 },
5131 {
5132 .cmd = NL80211_CMD_TRIGGER_SCAN,
5133 .doit = nl80211_trigger_scan,
5134 .policy = nl80211_policy,
5135 .flags = GENL_ADMIN_PERM,
5136 },
5137 {
5138 .cmd = NL80211_CMD_GET_SCAN,
5139 .policy = nl80211_policy,
5140 .dumpit = nl80211_dump_scan,
5141 },
5142 {
5143 .cmd = NL80211_CMD_AUTHENTICATE,
5144 .doit = nl80211_authenticate,
5145 .policy = nl80211_policy,
5146 .flags = GENL_ADMIN_PERM,
5147 },
5148 {
5149 .cmd = NL80211_CMD_ASSOCIATE,
5150 .doit = nl80211_associate,
5151 .policy = nl80211_policy,
5152 .flags = GENL_ADMIN_PERM,
5153 },
5154 {
5155 .cmd = NL80211_CMD_DEAUTHENTICATE,
5156 .doit = nl80211_deauthenticate,
5157 .policy = nl80211_policy,
5158 .flags = GENL_ADMIN_PERM,
5159 },
5160 {
5161 .cmd = NL80211_CMD_DISASSOCIATE,
5162 .doit = nl80211_disassociate,
5163 .policy = nl80211_policy,
5164 .flags = GENL_ADMIN_PERM,
5165 },
5166 {
5167 .cmd = NL80211_CMD_JOIN_IBSS,
5168 .doit = nl80211_join_ibss,
5169 .policy = nl80211_policy,
5170 .flags = GENL_ADMIN_PERM,
5171 },
5172 {
5173 .cmd = NL80211_CMD_LEAVE_IBSS,
5174 .doit = nl80211_leave_ibss,
5175 .policy = nl80211_policy,
5176 .flags = GENL_ADMIN_PERM,
5177 },
5178 #ifdef CONFIG_NL80211_TESTMODE
5179 {
5180 .cmd = NL80211_CMD_TESTMODE,
5181 .doit = nl80211_testmode_do,
5182 .policy = nl80211_policy,
5183 .flags = GENL_ADMIN_PERM,
5184 },
5185 #endif
5186 {
5187 .cmd = NL80211_CMD_CONNECT,
5188 .doit = nl80211_connect,
5189 .policy = nl80211_policy,
5190 .flags = GENL_ADMIN_PERM,
5191 },
5192 {
5193 .cmd = NL80211_CMD_DISCONNECT,
5194 .doit = nl80211_disconnect,
5195 .policy = nl80211_policy,
5196 .flags = GENL_ADMIN_PERM,
5197 },
5198 {
5199 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5200 .doit = nl80211_wiphy_netns,
5201 .policy = nl80211_policy,
5202 .flags = GENL_ADMIN_PERM,
5203 },
5204 {
5205 .cmd = NL80211_CMD_GET_SURVEY,
5206 .policy = nl80211_policy,
5207 .dumpit = nl80211_dump_survey,
5208 },
5209 {
5210 .cmd = NL80211_CMD_SET_PMKSA,
5211 .doit = nl80211_setdel_pmksa,
5212 .policy = nl80211_policy,
5213 .flags = GENL_ADMIN_PERM,
5214 },
5215 {
5216 .cmd = NL80211_CMD_DEL_PMKSA,
5217 .doit = nl80211_setdel_pmksa,
5218 .policy = nl80211_policy,
5219 .flags = GENL_ADMIN_PERM,
5220 },
5221 {
5222 .cmd = NL80211_CMD_FLUSH_PMKSA,
5223 .doit = nl80211_flush_pmksa,
5224 .policy = nl80211_policy,
5225 .flags = GENL_ADMIN_PERM,
5226 },
5227 {
5228 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5229 .doit = nl80211_remain_on_channel,
5230 .policy = nl80211_policy,
5231 .flags = GENL_ADMIN_PERM,
5232 },
5233 {
5234 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5235 .doit = nl80211_cancel_remain_on_channel,
5236 .policy = nl80211_policy,
5237 .flags = GENL_ADMIN_PERM,
5238 },
5239 {
5240 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5241 .doit = nl80211_set_tx_bitrate_mask,
5242 .policy = nl80211_policy,
5243 .flags = GENL_ADMIN_PERM,
5244 },
5245 {
5246 .cmd = NL80211_CMD_REGISTER_ACTION,
5247 .doit = nl80211_register_action,
5248 .policy = nl80211_policy,
5249 .flags = GENL_ADMIN_PERM,
5250 },
5251 {
5252 .cmd = NL80211_CMD_ACTION,
5253 .doit = nl80211_action,
5254 .policy = nl80211_policy,
5255 .flags = GENL_ADMIN_PERM,
5256 },
5257 {
5258 .cmd = NL80211_CMD_SET_POWER_SAVE,
5259 .doit = nl80211_set_power_save,
5260 .policy = nl80211_policy,
5261 .flags = GENL_ADMIN_PERM,
5262 },
5263 {
5264 .cmd = NL80211_CMD_GET_POWER_SAVE,
5265 .doit = nl80211_get_power_save,
5266 .policy = nl80211_policy,
5267 /* can be retrieved by unprivileged users */
5268 },
5269 {
5270 .cmd = NL80211_CMD_SET_CQM,
5271 .doit = nl80211_set_cqm,
5272 .policy = nl80211_policy,
5273 .flags = GENL_ADMIN_PERM,
5274 },
5275 {
5276 .cmd = NL80211_CMD_SET_CHANNEL,
5277 .doit = nl80211_set_channel,
5278 .policy = nl80211_policy,
5279 .flags = GENL_ADMIN_PERM,
5280 },
5281 };
5282
5283 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5284 .name = "mlme",
5285 };
5286
5287 /* multicast groups */
5288 static struct genl_multicast_group nl80211_config_mcgrp = {
5289 .name = "config",
5290 };
5291 static struct genl_multicast_group nl80211_scan_mcgrp = {
5292 .name = "scan",
5293 };
5294 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5295 .name = "regulatory",
5296 };
5297
5298 /* notification functions */
5299
5300 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5301 {
5302 struct sk_buff *msg;
5303
5304 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5305 if (!msg)
5306 return;
5307
5308 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5309 nlmsg_free(msg);
5310 return;
5311 }
5312
5313 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5314 nl80211_config_mcgrp.id, GFP_KERNEL);
5315 }
5316
5317 static int nl80211_add_scan_req(struct sk_buff *msg,
5318 struct cfg80211_registered_device *rdev)
5319 {
5320 struct cfg80211_scan_request *req = rdev->scan_req;
5321 struct nlattr *nest;
5322 int i;
5323
5324 ASSERT_RDEV_LOCK(rdev);
5325
5326 if (WARN_ON(!req))
5327 return 0;
5328
5329 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5330 if (!nest)
5331 goto nla_put_failure;
5332 for (i = 0; i < req->n_ssids; i++)
5333 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5334 nla_nest_end(msg, nest);
5335
5336 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5337 if (!nest)
5338 goto nla_put_failure;
5339 for (i = 0; i < req->n_channels; i++)
5340 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5341 nla_nest_end(msg, nest);
5342
5343 if (req->ie)
5344 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5345
5346 return 0;
5347 nla_put_failure:
5348 return -ENOBUFS;
5349 }
5350
5351 static int nl80211_send_scan_msg(struct sk_buff *msg,
5352 struct cfg80211_registered_device *rdev,
5353 struct net_device *netdev,
5354 u32 pid, u32 seq, int flags,
5355 u32 cmd)
5356 {
5357 void *hdr;
5358
5359 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5360 if (!hdr)
5361 return -1;
5362
5363 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5364 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5365
5366 /* ignore errors and send incomplete event anyway */
5367 nl80211_add_scan_req(msg, rdev);
5368
5369 return genlmsg_end(msg, hdr);
5370
5371 nla_put_failure:
5372 genlmsg_cancel(msg, hdr);
5373 return -EMSGSIZE;
5374 }
5375
5376 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5377 struct net_device *netdev)
5378 {
5379 struct sk_buff *msg;
5380
5381 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5382 if (!msg)
5383 return;
5384
5385 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5386 NL80211_CMD_TRIGGER_SCAN) < 0) {
5387 nlmsg_free(msg);
5388 return;
5389 }
5390
5391 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5392 nl80211_scan_mcgrp.id, GFP_KERNEL);
5393 }
5394
5395 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5396 struct net_device *netdev)
5397 {
5398 struct sk_buff *msg;
5399
5400 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5401 if (!msg)
5402 return;
5403
5404 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5405 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5406 nlmsg_free(msg);
5407 return;
5408 }
5409
5410 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5411 nl80211_scan_mcgrp.id, GFP_KERNEL);
5412 }
5413
5414 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5415 struct net_device *netdev)
5416 {
5417 struct sk_buff *msg;
5418
5419 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5420 if (!msg)
5421 return;
5422
5423 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5424 NL80211_CMD_SCAN_ABORTED) < 0) {
5425 nlmsg_free(msg);
5426 return;
5427 }
5428
5429 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5430 nl80211_scan_mcgrp.id, GFP_KERNEL);
5431 }
5432
5433 /*
5434 * This can happen on global regulatory changes or device specific settings
5435 * based on custom world regulatory domains.
5436 */
5437 void nl80211_send_reg_change_event(struct regulatory_request *request)
5438 {
5439 struct sk_buff *msg;
5440 void *hdr;
5441
5442 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5443 if (!msg)
5444 return;
5445
5446 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5447 if (!hdr) {
5448 nlmsg_free(msg);
5449 return;
5450 }
5451
5452 /* Userspace can always count this one always being set */
5453 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5454
5455 if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5456 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5457 NL80211_REGDOM_TYPE_WORLD);
5458 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5459 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5460 NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5461 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5462 request->intersect)
5463 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5464 NL80211_REGDOM_TYPE_INTERSECTION);
5465 else {
5466 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5467 NL80211_REGDOM_TYPE_COUNTRY);
5468 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5469 }
5470
5471 if (wiphy_idx_valid(request->wiphy_idx))
5472 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5473
5474 if (genlmsg_end(msg, hdr) < 0) {
5475 nlmsg_free(msg);
5476 return;
5477 }
5478
5479 rcu_read_lock();
5480 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5481 GFP_ATOMIC);
5482 rcu_read_unlock();
5483
5484 return;
5485
5486 nla_put_failure:
5487 genlmsg_cancel(msg, hdr);
5488 nlmsg_free(msg);
5489 }
5490
5491 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5492 struct net_device *netdev,
5493 const u8 *buf, size_t len,
5494 enum nl80211_commands cmd, gfp_t gfp)
5495 {
5496 struct sk_buff *msg;
5497 void *hdr;
5498
5499 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5500 if (!msg)
5501 return;
5502
5503 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5504 if (!hdr) {
5505 nlmsg_free(msg);
5506 return;
5507 }
5508
5509 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5510 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5511 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5512
5513 if (genlmsg_end(msg, hdr) < 0) {
5514 nlmsg_free(msg);
5515 return;
5516 }
5517
5518 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5519 nl80211_mlme_mcgrp.id, gfp);
5520 return;
5521
5522 nla_put_failure:
5523 genlmsg_cancel(msg, hdr);
5524 nlmsg_free(msg);
5525 }
5526
5527 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5528 struct net_device *netdev, const u8 *buf,
5529 size_t len, gfp_t gfp)
5530 {
5531 nl80211_send_mlme_event(rdev, netdev, buf, len,
5532 NL80211_CMD_AUTHENTICATE, gfp);
5533 }
5534
5535 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5536 struct net_device *netdev, const u8 *buf,
5537 size_t len, gfp_t gfp)
5538 {
5539 nl80211_send_mlme_event(rdev, netdev, buf, len,
5540 NL80211_CMD_ASSOCIATE, gfp);
5541 }
5542
5543 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5544 struct net_device *netdev, const u8 *buf,
5545 size_t len, gfp_t gfp)
5546 {
5547 nl80211_send_mlme_event(rdev, netdev, buf, len,
5548 NL80211_CMD_DEAUTHENTICATE, gfp);
5549 }
5550
5551 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5552 struct net_device *netdev, const u8 *buf,
5553 size_t len, gfp_t gfp)
5554 {
5555 nl80211_send_mlme_event(rdev, netdev, buf, len,
5556 NL80211_CMD_DISASSOCIATE, gfp);
5557 }
5558
5559 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5560 struct net_device *netdev, int cmd,
5561 const u8 *addr, gfp_t gfp)
5562 {
5563 struct sk_buff *msg;
5564 void *hdr;
5565
5566 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5567 if (!msg)
5568 return;
5569
5570 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5571 if (!hdr) {
5572 nlmsg_free(msg);
5573 return;
5574 }
5575
5576 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5577 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5578 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5579 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5580
5581 if (genlmsg_end(msg, hdr) < 0) {
5582 nlmsg_free(msg);
5583 return;
5584 }
5585
5586 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5587 nl80211_mlme_mcgrp.id, gfp);
5588 return;
5589
5590 nla_put_failure:
5591 genlmsg_cancel(msg, hdr);
5592 nlmsg_free(msg);
5593 }
5594
5595 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5596 struct net_device *netdev, const u8 *addr,
5597 gfp_t gfp)
5598 {
5599 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5600 addr, gfp);
5601 }
5602
5603 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5604 struct net_device *netdev, const u8 *addr,
5605 gfp_t gfp)
5606 {
5607 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5608 addr, gfp);
5609 }
5610
5611 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5612 struct net_device *netdev, const u8 *bssid,
5613 const u8 *req_ie, size_t req_ie_len,
5614 const u8 *resp_ie, size_t resp_ie_len,
5615 u16 status, gfp_t gfp)
5616 {
5617 struct sk_buff *msg;
5618 void *hdr;
5619
5620 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5621 if (!msg)
5622 return;
5623
5624 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5625 if (!hdr) {
5626 nlmsg_free(msg);
5627 return;
5628 }
5629
5630 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5631 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5632 if (bssid)
5633 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5634 NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5635 if (req_ie)
5636 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5637 if (resp_ie)
5638 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
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
5655 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5656 struct net_device *netdev, const u8 *bssid,
5657 const u8 *req_ie, size_t req_ie_len,
5658 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5659 {
5660 struct sk_buff *msg;
5661 void *hdr;
5662
5663 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5664 if (!msg)
5665 return;
5666
5667 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5668 if (!hdr) {
5669 nlmsg_free(msg);
5670 return;
5671 }
5672
5673 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5674 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5675 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5676 if (req_ie)
5677 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5678 if (resp_ie)
5679 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5680
5681 if (genlmsg_end(msg, hdr) < 0) {
5682 nlmsg_free(msg);
5683 return;
5684 }
5685
5686 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5687 nl80211_mlme_mcgrp.id, gfp);
5688 return;
5689
5690 nla_put_failure:
5691 genlmsg_cancel(msg, hdr);
5692 nlmsg_free(msg);
5693
5694 }
5695
5696 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5697 struct net_device *netdev, u16 reason,
5698 const u8 *ie, size_t ie_len, bool from_ap)
5699 {
5700 struct sk_buff *msg;
5701 void *hdr;
5702
5703 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5704 if (!msg)
5705 return;
5706
5707 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5708 if (!hdr) {
5709 nlmsg_free(msg);
5710 return;
5711 }
5712
5713 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5714 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5715 if (from_ap && reason)
5716 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5717 if (from_ap)
5718 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5719 if (ie)
5720 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5721
5722 if (genlmsg_end(msg, hdr) < 0) {
5723 nlmsg_free(msg);
5724 return;
5725 }
5726
5727 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5728 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5729 return;
5730
5731 nla_put_failure:
5732 genlmsg_cancel(msg, hdr);
5733 nlmsg_free(msg);
5734
5735 }
5736
5737 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5738 struct net_device *netdev, const u8 *bssid,
5739 gfp_t gfp)
5740 {
5741 struct sk_buff *msg;
5742 void *hdr;
5743
5744 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5745 if (!msg)
5746 return;
5747
5748 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5749 if (!hdr) {
5750 nlmsg_free(msg);
5751 return;
5752 }
5753
5754 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5755 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5756 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5757
5758 if (genlmsg_end(msg, hdr) < 0) {
5759 nlmsg_free(msg);
5760 return;
5761 }
5762
5763 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5764 nl80211_mlme_mcgrp.id, gfp);
5765 return;
5766
5767 nla_put_failure:
5768 genlmsg_cancel(msg, hdr);
5769 nlmsg_free(msg);
5770 }
5771
5772 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5773 struct net_device *netdev, const u8 *addr,
5774 enum nl80211_key_type key_type, int key_id,
5775 const u8 *tsc, gfp_t gfp)
5776 {
5777 struct sk_buff *msg;
5778 void *hdr;
5779
5780 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5781 if (!msg)
5782 return;
5783
5784 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5785 if (!hdr) {
5786 nlmsg_free(msg);
5787 return;
5788 }
5789
5790 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5791 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5792 if (addr)
5793 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5794 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5795 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5796 if (tsc)
5797 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5798
5799 if (genlmsg_end(msg, hdr) < 0) {
5800 nlmsg_free(msg);
5801 return;
5802 }
5803
5804 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5805 nl80211_mlme_mcgrp.id, gfp);
5806 return;
5807
5808 nla_put_failure:
5809 genlmsg_cancel(msg, hdr);
5810 nlmsg_free(msg);
5811 }
5812
5813 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5814 struct ieee80211_channel *channel_before,
5815 struct ieee80211_channel *channel_after)
5816 {
5817 struct sk_buff *msg;
5818 void *hdr;
5819 struct nlattr *nl_freq;
5820
5821 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5822 if (!msg)
5823 return;
5824
5825 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5826 if (!hdr) {
5827 nlmsg_free(msg);
5828 return;
5829 }
5830
5831 /*
5832 * Since we are applying the beacon hint to a wiphy we know its
5833 * wiphy_idx is valid
5834 */
5835 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5836
5837 /* Before */
5838 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5839 if (!nl_freq)
5840 goto nla_put_failure;
5841 if (nl80211_msg_put_channel(msg, channel_before))
5842 goto nla_put_failure;
5843 nla_nest_end(msg, nl_freq);
5844
5845 /* After */
5846 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5847 if (!nl_freq)
5848 goto nla_put_failure;
5849 if (nl80211_msg_put_channel(msg, channel_after))
5850 goto nla_put_failure;
5851 nla_nest_end(msg, nl_freq);
5852
5853 if (genlmsg_end(msg, hdr) < 0) {
5854 nlmsg_free(msg);
5855 return;
5856 }
5857
5858 rcu_read_lock();
5859 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5860 GFP_ATOMIC);
5861 rcu_read_unlock();
5862
5863 return;
5864
5865 nla_put_failure:
5866 genlmsg_cancel(msg, hdr);
5867 nlmsg_free(msg);
5868 }
5869
5870 static void nl80211_send_remain_on_chan_event(
5871 int cmd, struct cfg80211_registered_device *rdev,
5872 struct net_device *netdev, u64 cookie,
5873 struct ieee80211_channel *chan,
5874 enum nl80211_channel_type channel_type,
5875 unsigned int duration, gfp_t gfp)
5876 {
5877 struct sk_buff *msg;
5878 void *hdr;
5879
5880 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5881 if (!msg)
5882 return;
5883
5884 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5885 if (!hdr) {
5886 nlmsg_free(msg);
5887 return;
5888 }
5889
5890 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5891 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5892 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5893 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5894 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5895
5896 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5897 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5898
5899 if (genlmsg_end(msg, hdr) < 0) {
5900 nlmsg_free(msg);
5901 return;
5902 }
5903
5904 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5905 nl80211_mlme_mcgrp.id, gfp);
5906 return;
5907
5908 nla_put_failure:
5909 genlmsg_cancel(msg, hdr);
5910 nlmsg_free(msg);
5911 }
5912
5913 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5914 struct net_device *netdev, u64 cookie,
5915 struct ieee80211_channel *chan,
5916 enum nl80211_channel_type channel_type,
5917 unsigned int duration, gfp_t gfp)
5918 {
5919 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5920 rdev, netdev, cookie, chan,
5921 channel_type, duration, gfp);
5922 }
5923
5924 void nl80211_send_remain_on_channel_cancel(
5925 struct cfg80211_registered_device *rdev, struct net_device *netdev,
5926 u64 cookie, struct ieee80211_channel *chan,
5927 enum nl80211_channel_type channel_type, gfp_t gfp)
5928 {
5929 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5930 rdev, netdev, cookie, chan,
5931 channel_type, 0, gfp);
5932 }
5933
5934 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5935 struct net_device *dev, const u8 *mac_addr,
5936 struct station_info *sinfo, gfp_t gfp)
5937 {
5938 struct sk_buff *msg;
5939
5940 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5941 if (!msg)
5942 return;
5943
5944 if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5945 nlmsg_free(msg);
5946 return;
5947 }
5948
5949 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5950 nl80211_mlme_mcgrp.id, gfp);
5951 }
5952
5953 int nl80211_send_action(struct cfg80211_registered_device *rdev,
5954 struct net_device *netdev, u32 nlpid,
5955 int freq, const u8 *buf, size_t len, gfp_t gfp)
5956 {
5957 struct sk_buff *msg;
5958 void *hdr;
5959 int err;
5960
5961 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5962 if (!msg)
5963 return -ENOMEM;
5964
5965 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION);
5966 if (!hdr) {
5967 nlmsg_free(msg);
5968 return -ENOMEM;
5969 }
5970
5971 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5972 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5973 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5974 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5975
5976 err = genlmsg_end(msg, hdr);
5977 if (err < 0) {
5978 nlmsg_free(msg);
5979 return err;
5980 }
5981
5982 err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5983 if (err < 0)
5984 return err;
5985 return 0;
5986
5987 nla_put_failure:
5988 genlmsg_cancel(msg, hdr);
5989 nlmsg_free(msg);
5990 return -ENOBUFS;
5991 }
5992
5993 void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev,
5994 struct net_device *netdev, u64 cookie,
5995 const u8 *buf, size_t len, bool ack,
5996 gfp_t gfp)
5997 {
5998 struct sk_buff *msg;
5999 void *hdr;
6000
6001 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6002 if (!msg)
6003 return;
6004
6005 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION_TX_STATUS);
6006 if (!hdr) {
6007 nlmsg_free(msg);
6008 return;
6009 }
6010
6011 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6012 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6013 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6014 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6015 if (ack)
6016 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6017
6018 if (genlmsg_end(msg, hdr) < 0) {
6019 nlmsg_free(msg);
6020 return;
6021 }
6022
6023 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6024 return;
6025
6026 nla_put_failure:
6027 genlmsg_cancel(msg, hdr);
6028 nlmsg_free(msg);
6029 }
6030
6031 void
6032 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6033 struct net_device *netdev,
6034 enum nl80211_cqm_rssi_threshold_event rssi_event,
6035 gfp_t gfp)
6036 {
6037 struct sk_buff *msg;
6038 struct nlattr *pinfoattr;
6039 void *hdr;
6040
6041 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6042 if (!msg)
6043 return;
6044
6045 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6046 if (!hdr) {
6047 nlmsg_free(msg);
6048 return;
6049 }
6050
6051 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6052 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6053
6054 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6055 if (!pinfoattr)
6056 goto nla_put_failure;
6057
6058 NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6059 rssi_event);
6060
6061 nla_nest_end(msg, pinfoattr);
6062
6063 if (genlmsg_end(msg, hdr) < 0) {
6064 nlmsg_free(msg);
6065 return;
6066 }
6067
6068 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6069 nl80211_mlme_mcgrp.id, gfp);
6070 return;
6071
6072 nla_put_failure:
6073 genlmsg_cancel(msg, hdr);
6074 nlmsg_free(msg);
6075 }
6076
6077 static int nl80211_netlink_notify(struct notifier_block * nb,
6078 unsigned long state,
6079 void *_notify)
6080 {
6081 struct netlink_notify *notify = _notify;
6082 struct cfg80211_registered_device *rdev;
6083 struct wireless_dev *wdev;
6084
6085 if (state != NETLINK_URELEASE)
6086 return NOTIFY_DONE;
6087
6088 rcu_read_lock();
6089
6090 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6091 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6092 cfg80211_mlme_unregister_actions(wdev, notify->pid);
6093
6094 rcu_read_unlock();
6095
6096 return NOTIFY_DONE;
6097 }
6098
6099 static struct notifier_block nl80211_netlink_notifier = {
6100 .notifier_call = nl80211_netlink_notify,
6101 };
6102
6103 /* initialisation/exit functions */
6104
6105 int nl80211_init(void)
6106 {
6107 int err;
6108
6109 err = genl_register_family_with_ops(&nl80211_fam,
6110 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6111 if (err)
6112 return err;
6113
6114 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6115 if (err)
6116 goto err_out;
6117
6118 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6119 if (err)
6120 goto err_out;
6121
6122 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6123 if (err)
6124 goto err_out;
6125
6126 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6127 if (err)
6128 goto err_out;
6129
6130 #ifdef CONFIG_NL80211_TESTMODE
6131 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6132 if (err)
6133 goto err_out;
6134 #endif
6135
6136 err = netlink_register_notifier(&nl80211_netlink_notifier);
6137 if (err)
6138 goto err_out;
6139
6140 return 0;
6141 err_out:
6142 genl_unregister_family(&nl80211_fam);
6143 return err;
6144 }
6145
6146 void nl80211_exit(void)
6147 {
6148 netlink_unregister_notifier(&nl80211_netlink_notifier);
6149 genl_unregister_family(&nl80211_fam);
6150 }
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