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memcg: handle panic_on_oom=always case
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / wireless / nl80211.c
blobe447db04cf76dee4f178c3f8b98ac7c2be8393cb
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 };
153
154 /* policy for the attributes */
155 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
156 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
157 [NL80211_KEY_IDX] = { .type = NLA_U8 },
158 [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
159 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
160 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
161 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
162 };
163
164 /* ifidx get helper */
165 static int nl80211_get_ifidx(struct netlink_callback *cb)
166 {
167 int res;
168
169 res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
170 nl80211_fam.attrbuf, nl80211_fam.maxattr,
171 nl80211_policy);
172 if (res)
173 return res;
174
175 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
176 return -EINVAL;
177
178 res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
179 if (!res)
180 return -EINVAL;
181 return res;
182 }
183
184 /* IE validation */
185 static bool is_valid_ie_attr(const struct nlattr *attr)
186 {
187 const u8 *pos;
188 int len;
189
190 if (!attr)
191 return true;
192
193 pos = nla_data(attr);
194 len = nla_len(attr);
195
196 while (len) {
197 u8 elemlen;
198
199 if (len < 2)
200 return false;
201 len -= 2;
202
203 elemlen = pos[1];
204 if (elemlen > len)
205 return false;
206
207 len -= elemlen;
208 pos += 2 + elemlen;
209 }
210
211 return true;
212 }
213
214 /* message building helper */
215 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
216 int flags, u8 cmd)
217 {
218 /* since there is no private header just add the generic one */
219 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
220 }
221
222 static int nl80211_msg_put_channel(struct sk_buff *msg,
223 struct ieee80211_channel *chan)
224 {
225 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
226 chan->center_freq);
227
228 if (chan->flags & IEEE80211_CHAN_DISABLED)
229 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
230 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
231 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
232 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
233 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
234 if (chan->flags & IEEE80211_CHAN_RADAR)
235 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
236
237 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
238 DBM_TO_MBM(chan->max_power));
239
240 return 0;
241
242 nla_put_failure:
243 return -ENOBUFS;
244 }
245
246 /* netlink command implementations */
247
248 struct key_parse {
249 struct key_params p;
250 int idx;
251 bool def, defmgmt;
252 };
253
254 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
255 {
256 struct nlattr *tb[NL80211_KEY_MAX + 1];
257 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
258 nl80211_key_policy);
259 if (err)
260 return err;
261
262 k->def = !!tb[NL80211_KEY_DEFAULT];
263 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
264
265 if (tb[NL80211_KEY_IDX])
266 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
267
268 if (tb[NL80211_KEY_DATA]) {
269 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
270 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
271 }
272
273 if (tb[NL80211_KEY_SEQ]) {
274 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
275 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
276 }
277
278 if (tb[NL80211_KEY_CIPHER])
279 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
280
281 return 0;
282 }
283
284 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
285 {
286 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
287 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
288 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
289 }
290
291 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
292 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
293 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
294 }
295
296 if (info->attrs[NL80211_ATTR_KEY_IDX])
297 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
298
299 if (info->attrs[NL80211_ATTR_KEY_CIPHER])
300 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
301
302 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
303 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
304
305 return 0;
306 }
307
308 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
309 {
310 int err;
311
312 memset(k, 0, sizeof(*k));
313 k->idx = -1;
314
315 if (info->attrs[NL80211_ATTR_KEY])
316 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
317 else
318 err = nl80211_parse_key_old(info, k);
319
320 if (err)
321 return err;
322
323 if (k->def && k->defmgmt)
324 return -EINVAL;
325
326 if (k->idx != -1) {
327 if (k->defmgmt) {
328 if (k->idx < 4 || k->idx > 5)
329 return -EINVAL;
330 } else if (k->def) {
331 if (k->idx < 0 || k->idx > 3)
332 return -EINVAL;
333 } else {
334 if (k->idx < 0 || k->idx > 5)
335 return -EINVAL;
336 }
337 }
338
339 return 0;
340 }
341
342 static struct cfg80211_cached_keys *
343 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
344 struct nlattr *keys)
345 {
346 struct key_parse parse;
347 struct nlattr *key;
348 struct cfg80211_cached_keys *result;
349 int rem, err, def = 0;
350
351 result = kzalloc(sizeof(*result), GFP_KERNEL);
352 if (!result)
353 return ERR_PTR(-ENOMEM);
354
355 result->def = -1;
356 result->defmgmt = -1;
357
358 nla_for_each_nested(key, keys, rem) {
359 memset(&parse, 0, sizeof(parse));
360 parse.idx = -1;
361
362 err = nl80211_parse_key_new(key, &parse);
363 if (err)
364 goto error;
365 err = -EINVAL;
366 if (!parse.p.key)
367 goto error;
368 if (parse.idx < 0 || parse.idx > 4)
369 goto error;
370 if (parse.def) {
371 if (def)
372 goto error;
373 def = 1;
374 result->def = parse.idx;
375 } else if (parse.defmgmt)
376 goto error;
377 err = cfg80211_validate_key_settings(rdev, &parse.p,
378 parse.idx, NULL);
379 if (err)
380 goto error;
381 result->params[parse.idx].cipher = parse.p.cipher;
382 result->params[parse.idx].key_len = parse.p.key_len;
383 result->params[parse.idx].key = result->data[parse.idx];
384 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
385 }
386
387 return result;
388 error:
389 kfree(result);
390 return ERR_PTR(err);
391 }
392
393 static int nl80211_key_allowed(struct wireless_dev *wdev)
394 {
395 ASSERT_WDEV_LOCK(wdev);
396
397 if (!netif_running(wdev->netdev))
398 return -ENETDOWN;
399
400 switch (wdev->iftype) {
401 case NL80211_IFTYPE_AP:
402 case NL80211_IFTYPE_AP_VLAN:
403 break;
404 case NL80211_IFTYPE_ADHOC:
405 if (!wdev->current_bss)
406 return -ENOLINK;
407 break;
408 case NL80211_IFTYPE_STATION:
409 if (wdev->sme_state != CFG80211_SME_CONNECTED)
410 return -ENOLINK;
411 break;
412 default:
413 return -EINVAL;
414 }
415
416 return 0;
417 }
418
419 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
420 struct cfg80211_registered_device *dev)
421 {
422 void *hdr;
423 struct nlattr *nl_bands, *nl_band;
424 struct nlattr *nl_freqs, *nl_freq;
425 struct nlattr *nl_rates, *nl_rate;
426 struct nlattr *nl_modes;
427 struct nlattr *nl_cmds;
428 enum ieee80211_band band;
429 struct ieee80211_channel *chan;
430 struct ieee80211_rate *rate;
431 int i;
432 u16 ifmodes = dev->wiphy.interface_modes;
433
434 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
435 if (!hdr)
436 return -1;
437
438 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
439 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
440
441 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
442 cfg80211_rdev_list_generation);
443
444 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
445 dev->wiphy.retry_short);
446 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
447 dev->wiphy.retry_long);
448 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
449 dev->wiphy.frag_threshold);
450 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
451 dev->wiphy.rts_threshold);
452 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
453 dev->wiphy.coverage_class);
454
455 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
456 dev->wiphy.max_scan_ssids);
457 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
458 dev->wiphy.max_scan_ie_len);
459
460 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
461 sizeof(u32) * dev->wiphy.n_cipher_suites,
462 dev->wiphy.cipher_suites);
463
464 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
465 dev->wiphy.max_num_pmkids);
466
467 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
468 if (!nl_modes)
469 goto nla_put_failure;
470
471 i = 0;
472 while (ifmodes) {
473 if (ifmodes & 1)
474 NLA_PUT_FLAG(msg, i);
475 ifmodes >>= 1;
476 i++;
477 }
478
479 nla_nest_end(msg, nl_modes);
480
481 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
482 if (!nl_bands)
483 goto nla_put_failure;
484
485 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
486 if (!dev->wiphy.bands[band])
487 continue;
488
489 nl_band = nla_nest_start(msg, band);
490 if (!nl_band)
491 goto nla_put_failure;
492
493 /* add HT info */
494 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
495 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
496 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
497 &dev->wiphy.bands[band]->ht_cap.mcs);
498 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
499 dev->wiphy.bands[band]->ht_cap.cap);
500 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
501 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
502 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
503 dev->wiphy.bands[band]->ht_cap.ampdu_density);
504 }
505
506 /* add frequencies */
507 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
508 if (!nl_freqs)
509 goto nla_put_failure;
510
511 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
512 nl_freq = nla_nest_start(msg, i);
513 if (!nl_freq)
514 goto nla_put_failure;
515
516 chan = &dev->wiphy.bands[band]->channels[i];
517
518 if (nl80211_msg_put_channel(msg, chan))
519 goto nla_put_failure;
520
521 nla_nest_end(msg, nl_freq);
522 }
523
524 nla_nest_end(msg, nl_freqs);
525
526 /* add bitrates */
527 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
528 if (!nl_rates)
529 goto nla_put_failure;
530
531 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
532 nl_rate = nla_nest_start(msg, i);
533 if (!nl_rate)
534 goto nla_put_failure;
535
536 rate = &dev->wiphy.bands[band]->bitrates[i];
537 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
538 rate->bitrate);
539 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
540 NLA_PUT_FLAG(msg,
541 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
542
543 nla_nest_end(msg, nl_rate);
544 }
545
546 nla_nest_end(msg, nl_rates);
547
548 nla_nest_end(msg, nl_band);
549 }
550 nla_nest_end(msg, nl_bands);
551
552 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
553 if (!nl_cmds)
554 goto nla_put_failure;
555
556 i = 0;
557 #define CMD(op, n) \
558 do { \
559 if (dev->ops->op) { \
560 i++; \
561 NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
562 } \
563 } while (0)
564
565 CMD(add_virtual_intf, NEW_INTERFACE);
566 CMD(change_virtual_intf, SET_INTERFACE);
567 CMD(add_key, NEW_KEY);
568 CMD(add_beacon, NEW_BEACON);
569 CMD(add_station, NEW_STATION);
570 CMD(add_mpath, NEW_MPATH);
571 CMD(set_mesh_params, SET_MESH_PARAMS);
572 CMD(change_bss, SET_BSS);
573 CMD(auth, AUTHENTICATE);
574 CMD(assoc, ASSOCIATE);
575 CMD(deauth, DEAUTHENTICATE);
576 CMD(disassoc, DISASSOCIATE);
577 CMD(join_ibss, JOIN_IBSS);
578 CMD(set_pmksa, SET_PMKSA);
579 CMD(del_pmksa, DEL_PMKSA);
580 CMD(flush_pmksa, FLUSH_PMKSA);
581 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
582 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
583 CMD(action, ACTION);
584 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
585 i++;
586 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
587 }
588
589 #undef CMD
590
591 if (dev->ops->connect || dev->ops->auth) {
592 i++;
593 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
594 }
595
596 if (dev->ops->disconnect || dev->ops->deauth) {
597 i++;
598 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
599 }
600
601 nla_nest_end(msg, nl_cmds);
602
603 return genlmsg_end(msg, hdr);
604
605 nla_put_failure:
606 genlmsg_cancel(msg, hdr);
607 return -EMSGSIZE;
608 }
609
610 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
611 {
612 int idx = 0;
613 int start = cb->args[0];
614 struct cfg80211_registered_device *dev;
615
616 mutex_lock(&cfg80211_mutex);
617 list_for_each_entry(dev, &cfg80211_rdev_list, list) {
618 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
619 continue;
620 if (++idx <= start)
621 continue;
622 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
623 cb->nlh->nlmsg_seq, NLM_F_MULTI,
624 dev) < 0) {
625 idx--;
626 break;
627 }
628 }
629 mutex_unlock(&cfg80211_mutex);
630
631 cb->args[0] = idx;
632
633 return skb->len;
634 }
635
636 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
637 {
638 struct sk_buff *msg;
639 struct cfg80211_registered_device *dev;
640
641 dev = cfg80211_get_dev_from_info(info);
642 if (IS_ERR(dev))
643 return PTR_ERR(dev);
644
645 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
646 if (!msg)
647 goto out_err;
648
649 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
650 goto out_free;
651
652 cfg80211_unlock_rdev(dev);
653
654 return genlmsg_reply(msg, info);
655
656 out_free:
657 nlmsg_free(msg);
658 out_err:
659 cfg80211_unlock_rdev(dev);
660 return -ENOBUFS;
661 }
662
663 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
664 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
665 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
666 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
667 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
668 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
669 };
670
671 static int parse_txq_params(struct nlattr *tb[],
672 struct ieee80211_txq_params *txq_params)
673 {
674 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
675 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
676 !tb[NL80211_TXQ_ATTR_AIFS])
677 return -EINVAL;
678
679 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
680 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
681 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
682 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
683 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
684
685 return 0;
686 }
687
688 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
689 {
690 struct cfg80211_registered_device *rdev;
691 int result = 0, rem_txq_params = 0;
692 struct nlattr *nl_txq_params;
693 u32 changed;
694 u8 retry_short = 0, retry_long = 0;
695 u32 frag_threshold = 0, rts_threshold = 0;
696 u8 coverage_class = 0;
697
698 rtnl_lock();
699
700 mutex_lock(&cfg80211_mutex);
701
702 rdev = __cfg80211_rdev_from_info(info);
703 if (IS_ERR(rdev)) {
704 mutex_unlock(&cfg80211_mutex);
705 result = PTR_ERR(rdev);
706 goto unlock;
707 }
708
709 mutex_lock(&rdev->mtx);
710
711 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
712 result = cfg80211_dev_rename(
713 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
714
715 mutex_unlock(&cfg80211_mutex);
716
717 if (result)
718 goto bad_res;
719
720 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
721 struct ieee80211_txq_params txq_params;
722 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
723
724 if (!rdev->ops->set_txq_params) {
725 result = -EOPNOTSUPP;
726 goto bad_res;
727 }
728
729 nla_for_each_nested(nl_txq_params,
730 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
731 rem_txq_params) {
732 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
733 nla_data(nl_txq_params),
734 nla_len(nl_txq_params),
735 txq_params_policy);
736 result = parse_txq_params(tb, &txq_params);
737 if (result)
738 goto bad_res;
739
740 result = rdev->ops->set_txq_params(&rdev->wiphy,
741 &txq_params);
742 if (result)
743 goto bad_res;
744 }
745 }
746
747 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
748 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
749 u32 freq;
750
751 result = -EINVAL;
752
753 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
754 channel_type = nla_get_u32(info->attrs[
755 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
756 if (channel_type != NL80211_CHAN_NO_HT &&
757 channel_type != NL80211_CHAN_HT20 &&
758 channel_type != NL80211_CHAN_HT40PLUS &&
759 channel_type != NL80211_CHAN_HT40MINUS)
760 goto bad_res;
761 }
762
763 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
764
765 mutex_lock(&rdev->devlist_mtx);
766 result = rdev_set_freq(rdev, NULL, freq, channel_type);
767 mutex_unlock(&rdev->devlist_mtx);
768 if (result)
769 goto bad_res;
770 }
771
772 changed = 0;
773
774 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
775 retry_short = nla_get_u8(
776 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
777 if (retry_short == 0) {
778 result = -EINVAL;
779 goto bad_res;
780 }
781 changed |= WIPHY_PARAM_RETRY_SHORT;
782 }
783
784 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
785 retry_long = nla_get_u8(
786 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
787 if (retry_long == 0) {
788 result = -EINVAL;
789 goto bad_res;
790 }
791 changed |= WIPHY_PARAM_RETRY_LONG;
792 }
793
794 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
795 frag_threshold = nla_get_u32(
796 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
797 if (frag_threshold < 256) {
798 result = -EINVAL;
799 goto bad_res;
800 }
801 if (frag_threshold != (u32) -1) {
802 /*
803 * Fragments (apart from the last one) are required to
804 * have even length. Make the fragmentation code
805 * simpler by stripping LSB should someone try to use
806 * odd threshold value.
807 */
808 frag_threshold &= ~0x1;
809 }
810 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
811 }
812
813 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
814 rts_threshold = nla_get_u32(
815 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
816 changed |= WIPHY_PARAM_RTS_THRESHOLD;
817 }
818
819 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
820 coverage_class = nla_get_u8(
821 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
822 changed |= WIPHY_PARAM_COVERAGE_CLASS;
823 }
824
825 if (changed) {
826 u8 old_retry_short, old_retry_long;
827 u32 old_frag_threshold, old_rts_threshold;
828 u8 old_coverage_class;
829
830 if (!rdev->ops->set_wiphy_params) {
831 result = -EOPNOTSUPP;
832 goto bad_res;
833 }
834
835 old_retry_short = rdev->wiphy.retry_short;
836 old_retry_long = rdev->wiphy.retry_long;
837 old_frag_threshold = rdev->wiphy.frag_threshold;
838 old_rts_threshold = rdev->wiphy.rts_threshold;
839 old_coverage_class = rdev->wiphy.coverage_class;
840
841 if (changed & WIPHY_PARAM_RETRY_SHORT)
842 rdev->wiphy.retry_short = retry_short;
843 if (changed & WIPHY_PARAM_RETRY_LONG)
844 rdev->wiphy.retry_long = retry_long;
845 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
846 rdev->wiphy.frag_threshold = frag_threshold;
847 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
848 rdev->wiphy.rts_threshold = rts_threshold;
849 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
850 rdev->wiphy.coverage_class = coverage_class;
851
852 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
853 if (result) {
854 rdev->wiphy.retry_short = old_retry_short;
855 rdev->wiphy.retry_long = old_retry_long;
856 rdev->wiphy.frag_threshold = old_frag_threshold;
857 rdev->wiphy.rts_threshold = old_rts_threshold;
858 rdev->wiphy.coverage_class = old_coverage_class;
859 }
860 }
861
862 bad_res:
863 mutex_unlock(&rdev->mtx);
864 unlock:
865 rtnl_unlock();
866 return result;
867 }
868
869
870 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
871 struct cfg80211_registered_device *rdev,
872 struct net_device *dev)
873 {
874 void *hdr;
875
876 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
877 if (!hdr)
878 return -1;
879
880 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
881 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
882 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
883 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
884
885 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
886 rdev->devlist_generation ^
887 (cfg80211_rdev_list_generation << 2));
888
889 return genlmsg_end(msg, hdr);
890
891 nla_put_failure:
892 genlmsg_cancel(msg, hdr);
893 return -EMSGSIZE;
894 }
895
896 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
897 {
898 int wp_idx = 0;
899 int if_idx = 0;
900 int wp_start = cb->args[0];
901 int if_start = cb->args[1];
902 struct cfg80211_registered_device *rdev;
903 struct wireless_dev *wdev;
904
905 mutex_lock(&cfg80211_mutex);
906 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
907 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
908 continue;
909 if (wp_idx < wp_start) {
910 wp_idx++;
911 continue;
912 }
913 if_idx = 0;
914
915 mutex_lock(&rdev->devlist_mtx);
916 list_for_each_entry(wdev, &rdev->netdev_list, list) {
917 if (if_idx < if_start) {
918 if_idx++;
919 continue;
920 }
921 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
922 cb->nlh->nlmsg_seq, NLM_F_MULTI,
923 rdev, wdev->netdev) < 0) {
924 mutex_unlock(&rdev->devlist_mtx);
925 goto out;
926 }
927 if_idx++;
928 }
929 mutex_unlock(&rdev->devlist_mtx);
930
931 wp_idx++;
932 }
933 out:
934 mutex_unlock(&cfg80211_mutex);
935
936 cb->args[0] = wp_idx;
937 cb->args[1] = if_idx;
938
939 return skb->len;
940 }
941
942 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
943 {
944 struct sk_buff *msg;
945 struct cfg80211_registered_device *dev;
946 struct net_device *netdev;
947 int err;
948
949 err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
950 if (err)
951 return err;
952
953 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
954 if (!msg)
955 goto out_err;
956
957 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
958 dev, netdev) < 0)
959 goto out_free;
960
961 dev_put(netdev);
962 cfg80211_unlock_rdev(dev);
963
964 return genlmsg_reply(msg, info);
965
966 out_free:
967 nlmsg_free(msg);
968 out_err:
969 dev_put(netdev);
970 cfg80211_unlock_rdev(dev);
971 return -ENOBUFS;
972 }
973
974 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
975 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
976 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
977 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
978 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
979 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
980 };
981
982 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
983 {
984 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
985 int flag;
986
987 *mntrflags = 0;
988
989 if (!nla)
990 return -EINVAL;
991
992 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
993 nla, mntr_flags_policy))
994 return -EINVAL;
995
996 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
997 if (flags[flag])
998 *mntrflags |= (1<<flag);
999
1000 return 0;
1001 }
1002
1003 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1004 struct net_device *netdev, u8 use_4addr,
1005 enum nl80211_iftype iftype)
1006 {
1007 if (!use_4addr) {
1008 if (netdev && netdev->br_port)
1009 return -EBUSY;
1010 return 0;
1011 }
1012
1013 switch (iftype) {
1014 case NL80211_IFTYPE_AP_VLAN:
1015 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1016 return 0;
1017 break;
1018 case NL80211_IFTYPE_STATION:
1019 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1020 return 0;
1021 break;
1022 default:
1023 break;
1024 }
1025
1026 return -EOPNOTSUPP;
1027 }
1028
1029 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1030 {
1031 struct cfg80211_registered_device *rdev;
1032 struct vif_params params;
1033 int err;
1034 enum nl80211_iftype otype, ntype;
1035 struct net_device *dev;
1036 u32 _flags, *flags = NULL;
1037 bool change = false;
1038
1039 memset(&params, 0, sizeof(params));
1040
1041 rtnl_lock();
1042
1043 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1044 if (err)
1045 goto unlock_rtnl;
1046
1047 otype = ntype = dev->ieee80211_ptr->iftype;
1048
1049 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1050 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1051 if (otype != ntype)
1052 change = true;
1053 if (ntype > NL80211_IFTYPE_MAX) {
1054 err = -EINVAL;
1055 goto unlock;
1056 }
1057 }
1058
1059 if (info->attrs[NL80211_ATTR_MESH_ID]) {
1060 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1061 err = -EINVAL;
1062 goto unlock;
1063 }
1064 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1065 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1066 change = true;
1067 }
1068
1069 if (info->attrs[NL80211_ATTR_4ADDR]) {
1070 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1071 change = true;
1072 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1073 if (err)
1074 goto unlock;
1075 } else {
1076 params.use_4addr = -1;
1077 }
1078
1079 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1080 if (ntype != NL80211_IFTYPE_MONITOR) {
1081 err = -EINVAL;
1082 goto unlock;
1083 }
1084 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1085 &_flags);
1086 if (err)
1087 goto unlock;
1088
1089 flags = &_flags;
1090 change = true;
1091 }
1092
1093 if (change)
1094 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1095 else
1096 err = 0;
1097
1098 if (!err && params.use_4addr != -1)
1099 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1100
1101 unlock:
1102 dev_put(dev);
1103 cfg80211_unlock_rdev(rdev);
1104 unlock_rtnl:
1105 rtnl_unlock();
1106 return err;
1107 }
1108
1109 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1110 {
1111 struct cfg80211_registered_device *rdev;
1112 struct vif_params params;
1113 int err;
1114 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1115 u32 flags;
1116
1117 memset(&params, 0, sizeof(params));
1118
1119 if (!info->attrs[NL80211_ATTR_IFNAME])
1120 return -EINVAL;
1121
1122 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1123 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1124 if (type > NL80211_IFTYPE_MAX)
1125 return -EINVAL;
1126 }
1127
1128 rtnl_lock();
1129
1130 rdev = cfg80211_get_dev_from_info(info);
1131 if (IS_ERR(rdev)) {
1132 err = PTR_ERR(rdev);
1133 goto unlock_rtnl;
1134 }
1135
1136 if (!rdev->ops->add_virtual_intf ||
1137 !(rdev->wiphy.interface_modes & (1 << type))) {
1138 err = -EOPNOTSUPP;
1139 goto unlock;
1140 }
1141
1142 if (type == NL80211_IFTYPE_MESH_POINT &&
1143 info->attrs[NL80211_ATTR_MESH_ID]) {
1144 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1145 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1146 }
1147
1148 if (info->attrs[NL80211_ATTR_4ADDR]) {
1149 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1150 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1151 if (err)
1152 goto unlock;
1153 }
1154
1155 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1156 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1157 &flags);
1158 err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1159 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1160 type, err ? NULL : &flags, &params);
1161
1162 unlock:
1163 cfg80211_unlock_rdev(rdev);
1164 unlock_rtnl:
1165 rtnl_unlock();
1166 return err;
1167 }
1168
1169 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1170 {
1171 struct cfg80211_registered_device *rdev;
1172 int err;
1173 struct net_device *dev;
1174
1175 rtnl_lock();
1176
1177 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1178 if (err)
1179 goto unlock_rtnl;
1180
1181 if (!rdev->ops->del_virtual_intf) {
1182 err = -EOPNOTSUPP;
1183 goto out;
1184 }
1185
1186 err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1187
1188 out:
1189 cfg80211_unlock_rdev(rdev);
1190 dev_put(dev);
1191 unlock_rtnl:
1192 rtnl_unlock();
1193 return err;
1194 }
1195
1196 struct get_key_cookie {
1197 struct sk_buff *msg;
1198 int error;
1199 int idx;
1200 };
1201
1202 static void get_key_callback(void *c, struct key_params *params)
1203 {
1204 struct nlattr *key;
1205 struct get_key_cookie *cookie = c;
1206
1207 if (params->key)
1208 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1209 params->key_len, params->key);
1210
1211 if (params->seq)
1212 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1213 params->seq_len, params->seq);
1214
1215 if (params->cipher)
1216 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1217 params->cipher);
1218
1219 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1220 if (!key)
1221 goto nla_put_failure;
1222
1223 if (params->key)
1224 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1225 params->key_len, params->key);
1226
1227 if (params->seq)
1228 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1229 params->seq_len, params->seq);
1230
1231 if (params->cipher)
1232 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1233 params->cipher);
1234
1235 NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1236
1237 nla_nest_end(cookie->msg, key);
1238
1239 return;
1240 nla_put_failure:
1241 cookie->error = 1;
1242 }
1243
1244 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1245 {
1246 struct cfg80211_registered_device *rdev;
1247 int err;
1248 struct net_device *dev;
1249 u8 key_idx = 0;
1250 u8 *mac_addr = NULL;
1251 struct get_key_cookie cookie = {
1252 .error = 0,
1253 };
1254 void *hdr;
1255 struct sk_buff *msg;
1256
1257 if (info->attrs[NL80211_ATTR_KEY_IDX])
1258 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1259
1260 if (key_idx > 5)
1261 return -EINVAL;
1262
1263 if (info->attrs[NL80211_ATTR_MAC])
1264 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1265
1266 rtnl_lock();
1267
1268 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1269 if (err)
1270 goto unlock_rtnl;
1271
1272 if (!rdev->ops->get_key) {
1273 err = -EOPNOTSUPP;
1274 goto out;
1275 }
1276
1277 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1278 if (!msg) {
1279 err = -ENOMEM;
1280 goto out;
1281 }
1282
1283 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1284 NL80211_CMD_NEW_KEY);
1285
1286 if (IS_ERR(hdr)) {
1287 err = PTR_ERR(hdr);
1288 goto free_msg;
1289 }
1290
1291 cookie.msg = msg;
1292 cookie.idx = key_idx;
1293
1294 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1295 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1296 if (mac_addr)
1297 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1298
1299 err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1300 &cookie, get_key_callback);
1301
1302 if (err)
1303 goto free_msg;
1304
1305 if (cookie.error)
1306 goto nla_put_failure;
1307
1308 genlmsg_end(msg, hdr);
1309 err = genlmsg_reply(msg, info);
1310 goto out;
1311
1312 nla_put_failure:
1313 err = -ENOBUFS;
1314 free_msg:
1315 nlmsg_free(msg);
1316 out:
1317 cfg80211_unlock_rdev(rdev);
1318 dev_put(dev);
1319 unlock_rtnl:
1320 rtnl_unlock();
1321
1322 return err;
1323 }
1324
1325 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1326 {
1327 struct cfg80211_registered_device *rdev;
1328 struct key_parse key;
1329 int err;
1330 struct net_device *dev;
1331 int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1332 u8 key_index);
1333
1334 err = nl80211_parse_key(info, &key);
1335 if (err)
1336 return err;
1337
1338 if (key.idx < 0)
1339 return -EINVAL;
1340
1341 /* only support setting default key */
1342 if (!key.def && !key.defmgmt)
1343 return -EINVAL;
1344
1345 rtnl_lock();
1346
1347 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1348 if (err)
1349 goto unlock_rtnl;
1350
1351 if (key.def)
1352 func = rdev->ops->set_default_key;
1353 else
1354 func = rdev->ops->set_default_mgmt_key;
1355
1356 if (!func) {
1357 err = -EOPNOTSUPP;
1358 goto out;
1359 }
1360
1361 wdev_lock(dev->ieee80211_ptr);
1362 err = nl80211_key_allowed(dev->ieee80211_ptr);
1363 if (!err)
1364 err = func(&rdev->wiphy, dev, key.idx);
1365
1366 #ifdef CONFIG_CFG80211_WEXT
1367 if (!err) {
1368 if (func == rdev->ops->set_default_key)
1369 dev->ieee80211_ptr->wext.default_key = key.idx;
1370 else
1371 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1372 }
1373 #endif
1374 wdev_unlock(dev->ieee80211_ptr);
1375
1376 out:
1377 cfg80211_unlock_rdev(rdev);
1378 dev_put(dev);
1379
1380 unlock_rtnl:
1381 rtnl_unlock();
1382
1383 return err;
1384 }
1385
1386 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1387 {
1388 struct cfg80211_registered_device *rdev;
1389 int err;
1390 struct net_device *dev;
1391 struct key_parse key;
1392 u8 *mac_addr = NULL;
1393
1394 err = nl80211_parse_key(info, &key);
1395 if (err)
1396 return err;
1397
1398 if (!key.p.key)
1399 return -EINVAL;
1400
1401 if (info->attrs[NL80211_ATTR_MAC])
1402 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1403
1404 rtnl_lock();
1405
1406 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1407 if (err)
1408 goto unlock_rtnl;
1409
1410 if (!rdev->ops->add_key) {
1411 err = -EOPNOTSUPP;
1412 goto out;
1413 }
1414
1415 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1416 err = -EINVAL;
1417 goto out;
1418 }
1419
1420 wdev_lock(dev->ieee80211_ptr);
1421 err = nl80211_key_allowed(dev->ieee80211_ptr);
1422 if (!err)
1423 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1424 mac_addr, &key.p);
1425 wdev_unlock(dev->ieee80211_ptr);
1426
1427 out:
1428 cfg80211_unlock_rdev(rdev);
1429 dev_put(dev);
1430 unlock_rtnl:
1431 rtnl_unlock();
1432
1433 return err;
1434 }
1435
1436 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1437 {
1438 struct cfg80211_registered_device *rdev;
1439 int err;
1440 struct net_device *dev;
1441 u8 *mac_addr = NULL;
1442 struct key_parse key;
1443
1444 err = nl80211_parse_key(info, &key);
1445 if (err)
1446 return err;
1447
1448 if (info->attrs[NL80211_ATTR_MAC])
1449 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1450
1451 rtnl_lock();
1452
1453 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1454 if (err)
1455 goto unlock_rtnl;
1456
1457 if (!rdev->ops->del_key) {
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 = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1466
1467 #ifdef CONFIG_CFG80211_WEXT
1468 if (!err) {
1469 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1470 dev->ieee80211_ptr->wext.default_key = -1;
1471 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1472 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
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_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1488 {
1489 int (*call)(struct wiphy *wiphy, struct net_device *dev,
1490 struct beacon_parameters *info);
1491 struct cfg80211_registered_device *rdev;
1492 int err;
1493 struct net_device *dev;
1494 struct beacon_parameters params;
1495 int haveinfo = 0;
1496
1497 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1498 return -EINVAL;
1499
1500 rtnl_lock();
1501
1502 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1503 if (err)
1504 goto unlock_rtnl;
1505
1506 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1507 err = -EOPNOTSUPP;
1508 goto out;
1509 }
1510
1511 switch (info->genlhdr->cmd) {
1512 case NL80211_CMD_NEW_BEACON:
1513 /* these are required for NEW_BEACON */
1514 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1515 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1516 !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1517 err = -EINVAL;
1518 goto out;
1519 }
1520
1521 call = rdev->ops->add_beacon;
1522 break;
1523 case NL80211_CMD_SET_BEACON:
1524 call = rdev->ops->set_beacon;
1525 break;
1526 default:
1527 WARN_ON(1);
1528 err = -EOPNOTSUPP;
1529 goto out;
1530 }
1531
1532 if (!call) {
1533 err = -EOPNOTSUPP;
1534 goto out;
1535 }
1536
1537 memset(&params, 0, sizeof(params));
1538
1539 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1540 params.interval =
1541 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1542 haveinfo = 1;
1543 }
1544
1545 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1546 params.dtim_period =
1547 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1548 haveinfo = 1;
1549 }
1550
1551 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1552 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1553 params.head_len =
1554 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1555 haveinfo = 1;
1556 }
1557
1558 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1559 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1560 params.tail_len =
1561 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1562 haveinfo = 1;
1563 }
1564
1565 if (!haveinfo) {
1566 err = -EINVAL;
1567 goto out;
1568 }
1569
1570 err = call(&rdev->wiphy, dev, &params);
1571
1572 out:
1573 cfg80211_unlock_rdev(rdev);
1574 dev_put(dev);
1575 unlock_rtnl:
1576 rtnl_unlock();
1577
1578 return err;
1579 }
1580
1581 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1582 {
1583 struct cfg80211_registered_device *rdev;
1584 int err;
1585 struct net_device *dev;
1586
1587 rtnl_lock();
1588
1589 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1590 if (err)
1591 goto unlock_rtnl;
1592
1593 if (!rdev->ops->del_beacon) {
1594 err = -EOPNOTSUPP;
1595 goto out;
1596 }
1597
1598 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1599 err = -EOPNOTSUPP;
1600 goto out;
1601 }
1602 err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1603
1604 out:
1605 cfg80211_unlock_rdev(rdev);
1606 dev_put(dev);
1607 unlock_rtnl:
1608 rtnl_unlock();
1609
1610 return err;
1611 }
1612
1613 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1614 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1615 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1616 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1617 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1618 };
1619
1620 static int parse_station_flags(struct genl_info *info,
1621 struct station_parameters *params)
1622 {
1623 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1624 struct nlattr *nla;
1625 int flag;
1626
1627 /*
1628 * Try parsing the new attribute first so userspace
1629 * can specify both for older kernels.
1630 */
1631 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1632 if (nla) {
1633 struct nl80211_sta_flag_update *sta_flags;
1634
1635 sta_flags = nla_data(nla);
1636 params->sta_flags_mask = sta_flags->mask;
1637 params->sta_flags_set = sta_flags->set;
1638 if ((params->sta_flags_mask |
1639 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1640 return -EINVAL;
1641 return 0;
1642 }
1643
1644 /* if present, parse the old attribute */
1645
1646 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1647 if (!nla)
1648 return 0;
1649
1650 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1651 nla, sta_flags_policy))
1652 return -EINVAL;
1653
1654 params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1655 params->sta_flags_mask &= ~1;
1656
1657 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1658 if (flags[flag])
1659 params->sta_flags_set |= (1<<flag);
1660
1661 return 0;
1662 }
1663
1664 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1665 int flags, struct net_device *dev,
1666 const u8 *mac_addr, struct station_info *sinfo)
1667 {
1668 void *hdr;
1669 struct nlattr *sinfoattr, *txrate;
1670 u16 bitrate;
1671
1672 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1673 if (!hdr)
1674 return -1;
1675
1676 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1677 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1678
1679 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1680
1681 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1682 if (!sinfoattr)
1683 goto nla_put_failure;
1684 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1685 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1686 sinfo->inactive_time);
1687 if (sinfo->filled & STATION_INFO_RX_BYTES)
1688 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1689 sinfo->rx_bytes);
1690 if (sinfo->filled & STATION_INFO_TX_BYTES)
1691 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1692 sinfo->tx_bytes);
1693 if (sinfo->filled & STATION_INFO_LLID)
1694 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1695 sinfo->llid);
1696 if (sinfo->filled & STATION_INFO_PLID)
1697 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1698 sinfo->plid);
1699 if (sinfo->filled & STATION_INFO_PLINK_STATE)
1700 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1701 sinfo->plink_state);
1702 if (sinfo->filled & STATION_INFO_SIGNAL)
1703 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1704 sinfo->signal);
1705 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1706 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1707 if (!txrate)
1708 goto nla_put_failure;
1709
1710 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1711 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1712 if (bitrate > 0)
1713 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1714
1715 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1716 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1717 sinfo->txrate.mcs);
1718 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1719 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1720 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1721 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1722
1723 nla_nest_end(msg, txrate);
1724 }
1725 if (sinfo->filled & STATION_INFO_RX_PACKETS)
1726 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1727 sinfo->rx_packets);
1728 if (sinfo->filled & STATION_INFO_TX_PACKETS)
1729 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1730 sinfo->tx_packets);
1731 nla_nest_end(msg, sinfoattr);
1732
1733 return genlmsg_end(msg, hdr);
1734
1735 nla_put_failure:
1736 genlmsg_cancel(msg, hdr);
1737 return -EMSGSIZE;
1738 }
1739
1740 static int nl80211_dump_station(struct sk_buff *skb,
1741 struct netlink_callback *cb)
1742 {
1743 struct station_info sinfo;
1744 struct cfg80211_registered_device *dev;
1745 struct net_device *netdev;
1746 u8 mac_addr[ETH_ALEN];
1747 int ifidx = cb->args[0];
1748 int sta_idx = cb->args[1];
1749 int err;
1750
1751 if (!ifidx)
1752 ifidx = nl80211_get_ifidx(cb);
1753 if (ifidx < 0)
1754 return ifidx;
1755
1756 rtnl_lock();
1757
1758 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1759 if (!netdev) {
1760 err = -ENODEV;
1761 goto out_rtnl;
1762 }
1763
1764 dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1765 if (IS_ERR(dev)) {
1766 err = PTR_ERR(dev);
1767 goto out_rtnl;
1768 }
1769
1770 if (!dev->ops->dump_station) {
1771 err = -EOPNOTSUPP;
1772 goto out_err;
1773 }
1774
1775 while (1) {
1776 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1777 mac_addr, &sinfo);
1778 if (err == -ENOENT)
1779 break;
1780 if (err)
1781 goto out_err;
1782
1783 if (nl80211_send_station(skb,
1784 NETLINK_CB(cb->skb).pid,
1785 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1786 netdev, mac_addr,
1787 &sinfo) < 0)
1788 goto out;
1789
1790 sta_idx++;
1791 }
1792
1793
1794 out:
1795 cb->args[1] = sta_idx;
1796 err = skb->len;
1797 out_err:
1798 cfg80211_unlock_rdev(dev);
1799 out_rtnl:
1800 rtnl_unlock();
1801
1802 return err;
1803 }
1804
1805 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1806 {
1807 struct cfg80211_registered_device *rdev;
1808 int err;
1809 struct net_device *dev;
1810 struct station_info sinfo;
1811 struct sk_buff *msg;
1812 u8 *mac_addr = NULL;
1813
1814 memset(&sinfo, 0, sizeof(sinfo));
1815
1816 if (!info->attrs[NL80211_ATTR_MAC])
1817 return -EINVAL;
1818
1819 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1820
1821 rtnl_lock();
1822
1823 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1824 if (err)
1825 goto out_rtnl;
1826
1827 if (!rdev->ops->get_station) {
1828 err = -EOPNOTSUPP;
1829 goto out;
1830 }
1831
1832 err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1833 if (err)
1834 goto out;
1835
1836 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1837 if (!msg)
1838 goto out;
1839
1840 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1841 dev, mac_addr, &sinfo) < 0)
1842 goto out_free;
1843
1844 err = genlmsg_reply(msg, info);
1845 goto out;
1846
1847 out_free:
1848 nlmsg_free(msg);
1849 out:
1850 cfg80211_unlock_rdev(rdev);
1851 dev_put(dev);
1852 out_rtnl:
1853 rtnl_unlock();
1854
1855 return err;
1856 }
1857
1858 /*
1859 * Get vlan interface making sure it is running and on the right wiphy.
1860 */
1861 static int get_vlan(struct genl_info *info,
1862 struct cfg80211_registered_device *rdev,
1863 struct net_device **vlan)
1864 {
1865 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1866 *vlan = NULL;
1867
1868 if (vlanattr) {
1869 *vlan = dev_get_by_index(genl_info_net(info),
1870 nla_get_u32(vlanattr));
1871 if (!*vlan)
1872 return -ENODEV;
1873 if (!(*vlan)->ieee80211_ptr)
1874 return -EINVAL;
1875 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1876 return -EINVAL;
1877 if (!netif_running(*vlan))
1878 return -ENETDOWN;
1879 }
1880 return 0;
1881 }
1882
1883 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1884 {
1885 struct cfg80211_registered_device *rdev;
1886 int err;
1887 struct net_device *dev;
1888 struct station_parameters params;
1889 u8 *mac_addr = NULL;
1890
1891 memset(&params, 0, sizeof(params));
1892
1893 params.listen_interval = -1;
1894
1895 if (info->attrs[NL80211_ATTR_STA_AID])
1896 return -EINVAL;
1897
1898 if (!info->attrs[NL80211_ATTR_MAC])
1899 return -EINVAL;
1900
1901 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1902
1903 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1904 params.supported_rates =
1905 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1906 params.supported_rates_len =
1907 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1908 }
1909
1910 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1911 params.listen_interval =
1912 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1913
1914 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1915 params.ht_capa =
1916 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1917
1918 if (parse_station_flags(info, &params))
1919 return -EINVAL;
1920
1921 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1922 params.plink_action =
1923 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1924
1925 rtnl_lock();
1926
1927 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1928 if (err)
1929 goto out_rtnl;
1930
1931 err = get_vlan(info, rdev, &params.vlan);
1932 if (err)
1933 goto out;
1934
1935 /* validate settings */
1936 err = 0;
1937
1938 switch (dev->ieee80211_ptr->iftype) {
1939 case NL80211_IFTYPE_AP:
1940 case NL80211_IFTYPE_AP_VLAN:
1941 /* disallow mesh-specific things */
1942 if (params.plink_action)
1943 err = -EINVAL;
1944 break;
1945 case NL80211_IFTYPE_STATION:
1946 /* disallow everything but AUTHORIZED flag */
1947 if (params.plink_action)
1948 err = -EINVAL;
1949 if (params.vlan)
1950 err = -EINVAL;
1951 if (params.supported_rates)
1952 err = -EINVAL;
1953 if (params.ht_capa)
1954 err = -EINVAL;
1955 if (params.listen_interval >= 0)
1956 err = -EINVAL;
1957 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1958 err = -EINVAL;
1959 break;
1960 case NL80211_IFTYPE_MESH_POINT:
1961 /* disallow things mesh doesn't support */
1962 if (params.vlan)
1963 err = -EINVAL;
1964 if (params.ht_capa)
1965 err = -EINVAL;
1966 if (params.listen_interval >= 0)
1967 err = -EINVAL;
1968 if (params.supported_rates)
1969 err = -EINVAL;
1970 if (params.sta_flags_mask)
1971 err = -EINVAL;
1972 break;
1973 default:
1974 err = -EINVAL;
1975 }
1976
1977 if (err)
1978 goto out;
1979
1980 if (!rdev->ops->change_station) {
1981 err = -EOPNOTSUPP;
1982 goto out;
1983 }
1984
1985 err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1986
1987 out:
1988 if (params.vlan)
1989 dev_put(params.vlan);
1990 cfg80211_unlock_rdev(rdev);
1991 dev_put(dev);
1992 out_rtnl:
1993 rtnl_unlock();
1994
1995 return err;
1996 }
1997
1998 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1999 {
2000 struct cfg80211_registered_device *rdev;
2001 int err;
2002 struct net_device *dev;
2003 struct station_parameters params;
2004 u8 *mac_addr = NULL;
2005
2006 memset(&params, 0, sizeof(params));
2007
2008 if (!info->attrs[NL80211_ATTR_MAC])
2009 return -EINVAL;
2010
2011 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2012 return -EINVAL;
2013
2014 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2015 return -EINVAL;
2016
2017 if (!info->attrs[NL80211_ATTR_STA_AID])
2018 return -EINVAL;
2019
2020 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2021 params.supported_rates =
2022 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2023 params.supported_rates_len =
2024 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2025 params.listen_interval =
2026 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2027
2028 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2029 if (!params.aid || params.aid > IEEE80211_MAX_AID)
2030 return -EINVAL;
2031
2032 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2033 params.ht_capa =
2034 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2035
2036 if (parse_station_flags(info, &params))
2037 return -EINVAL;
2038
2039 rtnl_lock();
2040
2041 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2042 if (err)
2043 goto out_rtnl;
2044
2045 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2046 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2047 err = -EINVAL;
2048 goto out;
2049 }
2050
2051 err = get_vlan(info, rdev, &params.vlan);
2052 if (err)
2053 goto out;
2054
2055 /* validate settings */
2056 err = 0;
2057
2058 if (!rdev->ops->add_station) {
2059 err = -EOPNOTSUPP;
2060 goto out;
2061 }
2062
2063 if (!netif_running(dev)) {
2064 err = -ENETDOWN;
2065 goto out;
2066 }
2067
2068 err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2069
2070 out:
2071 if (params.vlan)
2072 dev_put(params.vlan);
2073 cfg80211_unlock_rdev(rdev);
2074 dev_put(dev);
2075 out_rtnl:
2076 rtnl_unlock();
2077
2078 return err;
2079 }
2080
2081 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2082 {
2083 struct cfg80211_registered_device *rdev;
2084 int err;
2085 struct net_device *dev;
2086 u8 *mac_addr = NULL;
2087
2088 if (info->attrs[NL80211_ATTR_MAC])
2089 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2090
2091 rtnl_lock();
2092
2093 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2094 if (err)
2095 goto out_rtnl;
2096
2097 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2098 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2099 err = -EINVAL;
2100 goto out;
2101 }
2102
2103 if (!rdev->ops->del_station) {
2104 err = -EOPNOTSUPP;
2105 goto out;
2106 }
2107
2108 err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2109
2110 out:
2111 cfg80211_unlock_rdev(rdev);
2112 dev_put(dev);
2113 out_rtnl:
2114 rtnl_unlock();
2115
2116 return err;
2117 }
2118
2119 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2120 int flags, struct net_device *dev,
2121 u8 *dst, u8 *next_hop,
2122 struct mpath_info *pinfo)
2123 {
2124 void *hdr;
2125 struct nlattr *pinfoattr;
2126
2127 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2128 if (!hdr)
2129 return -1;
2130
2131 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2132 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2133 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2134
2135 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2136
2137 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2138 if (!pinfoattr)
2139 goto nla_put_failure;
2140 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2141 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2142 pinfo->frame_qlen);
2143 if (pinfo->filled & MPATH_INFO_SN)
2144 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2145 pinfo->sn);
2146 if (pinfo->filled & MPATH_INFO_METRIC)
2147 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2148 pinfo->metric);
2149 if (pinfo->filled & MPATH_INFO_EXPTIME)
2150 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2151 pinfo->exptime);
2152 if (pinfo->filled & MPATH_INFO_FLAGS)
2153 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2154 pinfo->flags);
2155 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2156 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2157 pinfo->discovery_timeout);
2158 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2159 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2160 pinfo->discovery_retries);
2161
2162 nla_nest_end(msg, pinfoattr);
2163
2164 return genlmsg_end(msg, hdr);
2165
2166 nla_put_failure:
2167 genlmsg_cancel(msg, hdr);
2168 return -EMSGSIZE;
2169 }
2170
2171 static int nl80211_dump_mpath(struct sk_buff *skb,
2172 struct netlink_callback *cb)
2173 {
2174 struct mpath_info pinfo;
2175 struct cfg80211_registered_device *dev;
2176 struct net_device *netdev;
2177 u8 dst[ETH_ALEN];
2178 u8 next_hop[ETH_ALEN];
2179 int ifidx = cb->args[0];
2180 int path_idx = cb->args[1];
2181 int err;
2182
2183 if (!ifidx)
2184 ifidx = nl80211_get_ifidx(cb);
2185 if (ifidx < 0)
2186 return ifidx;
2187
2188 rtnl_lock();
2189
2190 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2191 if (!netdev) {
2192 err = -ENODEV;
2193 goto out_rtnl;
2194 }
2195
2196 dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2197 if (IS_ERR(dev)) {
2198 err = PTR_ERR(dev);
2199 goto out_rtnl;
2200 }
2201
2202 if (!dev->ops->dump_mpath) {
2203 err = -EOPNOTSUPP;
2204 goto out_err;
2205 }
2206
2207 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2208 err = -EOPNOTSUPP;
2209 goto out_err;
2210 }
2211
2212 while (1) {
2213 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2214 dst, next_hop, &pinfo);
2215 if (err == -ENOENT)
2216 break;
2217 if (err)
2218 goto out_err;
2219
2220 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2221 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2222 netdev, dst, next_hop,
2223 &pinfo) < 0)
2224 goto out;
2225
2226 path_idx++;
2227 }
2228
2229
2230 out:
2231 cb->args[1] = path_idx;
2232 err = skb->len;
2233 out_err:
2234 cfg80211_unlock_rdev(dev);
2235 out_rtnl:
2236 rtnl_unlock();
2237
2238 return err;
2239 }
2240
2241 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2242 {
2243 struct cfg80211_registered_device *rdev;
2244 int err;
2245 struct net_device *dev;
2246 struct mpath_info pinfo;
2247 struct sk_buff *msg;
2248 u8 *dst = NULL;
2249 u8 next_hop[ETH_ALEN];
2250
2251 memset(&pinfo, 0, sizeof(pinfo));
2252
2253 if (!info->attrs[NL80211_ATTR_MAC])
2254 return -EINVAL;
2255
2256 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2257
2258 rtnl_lock();
2259
2260 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2261 if (err)
2262 goto out_rtnl;
2263
2264 if (!rdev->ops->get_mpath) {
2265 err = -EOPNOTSUPP;
2266 goto out;
2267 }
2268
2269 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2270 err = -EOPNOTSUPP;
2271 goto out;
2272 }
2273
2274 err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2275 if (err)
2276 goto out;
2277
2278 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2279 if (!msg)
2280 goto out;
2281
2282 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2283 dev, dst, next_hop, &pinfo) < 0)
2284 goto out_free;
2285
2286 err = genlmsg_reply(msg, info);
2287 goto out;
2288
2289 out_free:
2290 nlmsg_free(msg);
2291 out:
2292 cfg80211_unlock_rdev(rdev);
2293 dev_put(dev);
2294 out_rtnl:
2295 rtnl_unlock();
2296
2297 return err;
2298 }
2299
2300 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2301 {
2302 struct cfg80211_registered_device *rdev;
2303 int err;
2304 struct net_device *dev;
2305 u8 *dst = NULL;
2306 u8 *next_hop = NULL;
2307
2308 if (!info->attrs[NL80211_ATTR_MAC])
2309 return -EINVAL;
2310
2311 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2312 return -EINVAL;
2313
2314 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2315 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2316
2317 rtnl_lock();
2318
2319 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2320 if (err)
2321 goto out_rtnl;
2322
2323 if (!rdev->ops->change_mpath) {
2324 err = -EOPNOTSUPP;
2325 goto out;
2326 }
2327
2328 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2329 err = -EOPNOTSUPP;
2330 goto out;
2331 }
2332
2333 if (!netif_running(dev)) {
2334 err = -ENETDOWN;
2335 goto out;
2336 }
2337
2338 err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2339
2340 out:
2341 cfg80211_unlock_rdev(rdev);
2342 dev_put(dev);
2343 out_rtnl:
2344 rtnl_unlock();
2345
2346 return err;
2347 }
2348 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2349 {
2350 struct cfg80211_registered_device *rdev;
2351 int err;
2352 struct net_device *dev;
2353 u8 *dst = NULL;
2354 u8 *next_hop = NULL;
2355
2356 if (!info->attrs[NL80211_ATTR_MAC])
2357 return -EINVAL;
2358
2359 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2360 return -EINVAL;
2361
2362 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2363 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2364
2365 rtnl_lock();
2366
2367 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2368 if (err)
2369 goto out_rtnl;
2370
2371 if (!rdev->ops->add_mpath) {
2372 err = -EOPNOTSUPP;
2373 goto out;
2374 }
2375
2376 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2377 err = -EOPNOTSUPP;
2378 goto out;
2379 }
2380
2381 if (!netif_running(dev)) {
2382 err = -ENETDOWN;
2383 goto out;
2384 }
2385
2386 err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2387
2388 out:
2389 cfg80211_unlock_rdev(rdev);
2390 dev_put(dev);
2391 out_rtnl:
2392 rtnl_unlock();
2393
2394 return err;
2395 }
2396
2397 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2398 {
2399 struct cfg80211_registered_device *rdev;
2400 int err;
2401 struct net_device *dev;
2402 u8 *dst = NULL;
2403
2404 if (info->attrs[NL80211_ATTR_MAC])
2405 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2406
2407 rtnl_lock();
2408
2409 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2410 if (err)
2411 goto out_rtnl;
2412
2413 if (!rdev->ops->del_mpath) {
2414 err = -EOPNOTSUPP;
2415 goto out;
2416 }
2417
2418 err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2419
2420 out:
2421 cfg80211_unlock_rdev(rdev);
2422 dev_put(dev);
2423 out_rtnl:
2424 rtnl_unlock();
2425
2426 return err;
2427 }
2428
2429 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2430 {
2431 struct cfg80211_registered_device *rdev;
2432 int err;
2433 struct net_device *dev;
2434 struct bss_parameters params;
2435
2436 memset(&params, 0, sizeof(params));
2437 /* default to not changing parameters */
2438 params.use_cts_prot = -1;
2439 params.use_short_preamble = -1;
2440 params.use_short_slot_time = -1;
2441
2442 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2443 params.use_cts_prot =
2444 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2445 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2446 params.use_short_preamble =
2447 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2448 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2449 params.use_short_slot_time =
2450 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2451 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2452 params.basic_rates =
2453 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2454 params.basic_rates_len =
2455 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2456 }
2457
2458 rtnl_lock();
2459
2460 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2461 if (err)
2462 goto out_rtnl;
2463
2464 if (!rdev->ops->change_bss) {
2465 err = -EOPNOTSUPP;
2466 goto out;
2467 }
2468
2469 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2470 err = -EOPNOTSUPP;
2471 goto out;
2472 }
2473
2474 err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2475
2476 out:
2477 cfg80211_unlock_rdev(rdev);
2478 dev_put(dev);
2479 out_rtnl:
2480 rtnl_unlock();
2481
2482 return err;
2483 }
2484
2485 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2486 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
2487 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
2488 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
2489 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
2490 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
2491 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
2492 };
2493
2494 static int parse_reg_rule(struct nlattr *tb[],
2495 struct ieee80211_reg_rule *reg_rule)
2496 {
2497 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2498 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2499
2500 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2501 return -EINVAL;
2502 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2503 return -EINVAL;
2504 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2505 return -EINVAL;
2506 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2507 return -EINVAL;
2508 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2509 return -EINVAL;
2510
2511 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2512
2513 freq_range->start_freq_khz =
2514 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2515 freq_range->end_freq_khz =
2516 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2517 freq_range->max_bandwidth_khz =
2518 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2519
2520 power_rule->max_eirp =
2521 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2522
2523 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2524 power_rule->max_antenna_gain =
2525 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2526
2527 return 0;
2528 }
2529
2530 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2531 {
2532 int r;
2533 char *data = NULL;
2534
2535 /*
2536 * You should only get this when cfg80211 hasn't yet initialized
2537 * completely when built-in to the kernel right between the time
2538 * window between nl80211_init() and regulatory_init(), if that is
2539 * even possible.
2540 */
2541 mutex_lock(&cfg80211_mutex);
2542 if (unlikely(!cfg80211_regdomain)) {
2543 mutex_unlock(&cfg80211_mutex);
2544 return -EINPROGRESS;
2545 }
2546 mutex_unlock(&cfg80211_mutex);
2547
2548 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2549 return -EINVAL;
2550
2551 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2552
2553 r = regulatory_hint_user(data);
2554
2555 return r;
2556 }
2557
2558 static int nl80211_get_mesh_params(struct sk_buff *skb,
2559 struct genl_info *info)
2560 {
2561 struct cfg80211_registered_device *rdev;
2562 struct mesh_config cur_params;
2563 int err;
2564 struct net_device *dev;
2565 void *hdr;
2566 struct nlattr *pinfoattr;
2567 struct sk_buff *msg;
2568
2569 rtnl_lock();
2570
2571 /* Look up our device */
2572 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2573 if (err)
2574 goto out_rtnl;
2575
2576 if (!rdev->ops->get_mesh_params) {
2577 err = -EOPNOTSUPP;
2578 goto out;
2579 }
2580
2581 /* Get the mesh params */
2582 err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2583 if (err)
2584 goto out;
2585
2586 /* Draw up a netlink message to send back */
2587 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2588 if (!msg) {
2589 err = -ENOBUFS;
2590 goto out;
2591 }
2592 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2593 NL80211_CMD_GET_MESH_PARAMS);
2594 if (!hdr)
2595 goto nla_put_failure;
2596 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2597 if (!pinfoattr)
2598 goto nla_put_failure;
2599 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2600 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2601 cur_params.dot11MeshRetryTimeout);
2602 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2603 cur_params.dot11MeshConfirmTimeout);
2604 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2605 cur_params.dot11MeshHoldingTimeout);
2606 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2607 cur_params.dot11MeshMaxPeerLinks);
2608 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2609 cur_params.dot11MeshMaxRetries);
2610 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2611 cur_params.dot11MeshTTL);
2612 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2613 cur_params.auto_open_plinks);
2614 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2615 cur_params.dot11MeshHWMPmaxPREQretries);
2616 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2617 cur_params.path_refresh_time);
2618 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2619 cur_params.min_discovery_timeout);
2620 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2621 cur_params.dot11MeshHWMPactivePathTimeout);
2622 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2623 cur_params.dot11MeshHWMPpreqMinInterval);
2624 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2625 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2626 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2627 cur_params.dot11MeshHWMPRootMode);
2628 nla_nest_end(msg, pinfoattr);
2629 genlmsg_end(msg, hdr);
2630 err = genlmsg_reply(msg, info);
2631 goto out;
2632
2633 nla_put_failure:
2634 genlmsg_cancel(msg, hdr);
2635 err = -EMSGSIZE;
2636 out:
2637 /* Cleanup */
2638 cfg80211_unlock_rdev(rdev);
2639 dev_put(dev);
2640 out_rtnl:
2641 rtnl_unlock();
2642
2643 return err;
2644 }
2645
2646 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2647 do {\
2648 if (table[attr_num]) {\
2649 cfg.param = nla_fn(table[attr_num]); \
2650 mask |= (1 << (attr_num - 1)); \
2651 } \
2652 } while (0);\
2653
2654 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2655 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2656 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2657 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2658 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2659 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2660 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2661 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2662
2663 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2664 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2665 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2666 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2667 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2668 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2669 };
2670
2671 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2672 {
2673 int err;
2674 u32 mask;
2675 struct cfg80211_registered_device *rdev;
2676 struct net_device *dev;
2677 struct mesh_config cfg;
2678 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2679 struct nlattr *parent_attr;
2680
2681 parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2682 if (!parent_attr)
2683 return -EINVAL;
2684 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2685 parent_attr, nl80211_meshconf_params_policy))
2686 return -EINVAL;
2687
2688 rtnl_lock();
2689
2690 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2691 if (err)
2692 goto out_rtnl;
2693
2694 if (!rdev->ops->set_mesh_params) {
2695 err = -EOPNOTSUPP;
2696 goto out;
2697 }
2698
2699 /* This makes sure that there aren't more than 32 mesh config
2700 * parameters (otherwise our bitfield scheme would not work.) */
2701 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2702
2703 /* Fill in the params struct */
2704 mask = 0;
2705 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2706 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2707 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2708 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2709 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2710 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2711 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2712 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2713 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2714 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2715 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2716 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2717 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2718 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2719 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2720 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2721 nla_get_u8);
2722 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2723 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2724 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2725 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2726 nla_get_u16);
2727 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2728 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2729 nla_get_u32);
2730 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2731 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2732 nla_get_u16);
2733 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2734 dot11MeshHWMPnetDiameterTraversalTime,
2735 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2736 nla_get_u16);
2737 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2738 dot11MeshHWMPRootMode, mask,
2739 NL80211_MESHCONF_HWMP_ROOTMODE,
2740 nla_get_u8);
2741
2742 /* Apply changes */
2743 err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2744
2745 out:
2746 /* cleanup */
2747 cfg80211_unlock_rdev(rdev);
2748 dev_put(dev);
2749 out_rtnl:
2750 rtnl_unlock();
2751
2752 return err;
2753 }
2754
2755 #undef FILL_IN_MESH_PARAM_IF_SET
2756
2757 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2758 {
2759 struct sk_buff *msg;
2760 void *hdr = NULL;
2761 struct nlattr *nl_reg_rules;
2762 unsigned int i;
2763 int err = -EINVAL;
2764
2765 mutex_lock(&cfg80211_mutex);
2766
2767 if (!cfg80211_regdomain)
2768 goto out;
2769
2770 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2771 if (!msg) {
2772 err = -ENOBUFS;
2773 goto out;
2774 }
2775
2776 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2777 NL80211_CMD_GET_REG);
2778 if (!hdr)
2779 goto nla_put_failure;
2780
2781 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2782 cfg80211_regdomain->alpha2);
2783
2784 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2785 if (!nl_reg_rules)
2786 goto nla_put_failure;
2787
2788 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2789 struct nlattr *nl_reg_rule;
2790 const struct ieee80211_reg_rule *reg_rule;
2791 const struct ieee80211_freq_range *freq_range;
2792 const struct ieee80211_power_rule *power_rule;
2793
2794 reg_rule = &cfg80211_regdomain->reg_rules[i];
2795 freq_range = &reg_rule->freq_range;
2796 power_rule = &reg_rule->power_rule;
2797
2798 nl_reg_rule = nla_nest_start(msg, i);
2799 if (!nl_reg_rule)
2800 goto nla_put_failure;
2801
2802 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2803 reg_rule->flags);
2804 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2805 freq_range->start_freq_khz);
2806 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2807 freq_range->end_freq_khz);
2808 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2809 freq_range->max_bandwidth_khz);
2810 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2811 power_rule->max_antenna_gain);
2812 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2813 power_rule->max_eirp);
2814
2815 nla_nest_end(msg, nl_reg_rule);
2816 }
2817
2818 nla_nest_end(msg, nl_reg_rules);
2819
2820 genlmsg_end(msg, hdr);
2821 err = genlmsg_reply(msg, info);
2822 goto out;
2823
2824 nla_put_failure:
2825 genlmsg_cancel(msg, hdr);
2826 err = -EMSGSIZE;
2827 out:
2828 mutex_unlock(&cfg80211_mutex);
2829 return err;
2830 }
2831
2832 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2833 {
2834 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2835 struct nlattr *nl_reg_rule;
2836 char *alpha2 = NULL;
2837 int rem_reg_rules = 0, r = 0;
2838 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2839 struct ieee80211_regdomain *rd = NULL;
2840
2841 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2842 return -EINVAL;
2843
2844 if (!info->attrs[NL80211_ATTR_REG_RULES])
2845 return -EINVAL;
2846
2847 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2848
2849 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2850 rem_reg_rules) {
2851 num_rules++;
2852 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2853 return -EINVAL;
2854 }
2855
2856 mutex_lock(&cfg80211_mutex);
2857
2858 if (!reg_is_valid_request(alpha2)) {
2859 r = -EINVAL;
2860 goto bad_reg;
2861 }
2862
2863 size_of_regd = sizeof(struct ieee80211_regdomain) +
2864 (num_rules * sizeof(struct ieee80211_reg_rule));
2865
2866 rd = kzalloc(size_of_regd, GFP_KERNEL);
2867 if (!rd) {
2868 r = -ENOMEM;
2869 goto bad_reg;
2870 }
2871
2872 rd->n_reg_rules = num_rules;
2873 rd->alpha2[0] = alpha2[0];
2874 rd->alpha2[1] = alpha2[1];
2875
2876 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2877 rem_reg_rules) {
2878 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2879 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2880 reg_rule_policy);
2881 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2882 if (r)
2883 goto bad_reg;
2884
2885 rule_idx++;
2886
2887 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2888 r = -EINVAL;
2889 goto bad_reg;
2890 }
2891 }
2892
2893 BUG_ON(rule_idx != num_rules);
2894
2895 r = set_regdom(rd);
2896
2897 mutex_unlock(&cfg80211_mutex);
2898
2899 return r;
2900
2901 bad_reg:
2902 mutex_unlock(&cfg80211_mutex);
2903 kfree(rd);
2904 return r;
2905 }
2906
2907 static int validate_scan_freqs(struct nlattr *freqs)
2908 {
2909 struct nlattr *attr1, *attr2;
2910 int n_channels = 0, tmp1, tmp2;
2911
2912 nla_for_each_nested(attr1, freqs, tmp1) {
2913 n_channels++;
2914 /*
2915 * Some hardware has a limited channel list for
2916 * scanning, and it is pretty much nonsensical
2917 * to scan for a channel twice, so disallow that
2918 * and don't require drivers to check that the
2919 * channel list they get isn't longer than what
2920 * they can scan, as long as they can scan all
2921 * the channels they registered at once.
2922 */
2923 nla_for_each_nested(attr2, freqs, tmp2)
2924 if (attr1 != attr2 &&
2925 nla_get_u32(attr1) == nla_get_u32(attr2))
2926 return 0;
2927 }
2928
2929 return n_channels;
2930 }
2931
2932 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2933 {
2934 struct cfg80211_registered_device *rdev;
2935 struct net_device *dev;
2936 struct cfg80211_scan_request *request;
2937 struct cfg80211_ssid *ssid;
2938 struct ieee80211_channel *channel;
2939 struct nlattr *attr;
2940 struct wiphy *wiphy;
2941 int err, tmp, n_ssids = 0, n_channels, i;
2942 enum ieee80211_band band;
2943 size_t ie_len;
2944
2945 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2946 return -EINVAL;
2947
2948 rtnl_lock();
2949
2950 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2951 if (err)
2952 goto out_rtnl;
2953
2954 wiphy = &rdev->wiphy;
2955
2956 if (!rdev->ops->scan) {
2957 err = -EOPNOTSUPP;
2958 goto out;
2959 }
2960
2961 if (!netif_running(dev)) {
2962 err = -ENETDOWN;
2963 goto out;
2964 }
2965
2966 if (rdev->scan_req) {
2967 err = -EBUSY;
2968 goto out;
2969 }
2970
2971 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2972 n_channels = validate_scan_freqs(
2973 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2974 if (!n_channels) {
2975 err = -EINVAL;
2976 goto out;
2977 }
2978 } else {
2979 n_channels = 0;
2980
2981 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2982 if (wiphy->bands[band])
2983 n_channels += wiphy->bands[band]->n_channels;
2984 }
2985
2986 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2987 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2988 n_ssids++;
2989
2990 if (n_ssids > wiphy->max_scan_ssids) {
2991 err = -EINVAL;
2992 goto out;
2993 }
2994
2995 if (info->attrs[NL80211_ATTR_IE])
2996 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2997 else
2998 ie_len = 0;
2999
3000 if (ie_len > wiphy->max_scan_ie_len) {
3001 err = -EINVAL;
3002 goto out;
3003 }
3004
3005 request = kzalloc(sizeof(*request)
3006 + sizeof(*ssid) * n_ssids
3007 + sizeof(channel) * n_channels
3008 + ie_len, GFP_KERNEL);
3009 if (!request) {
3010 err = -ENOMEM;
3011 goto out;
3012 }
3013
3014 if (n_ssids)
3015 request->ssids = (void *)&request->channels[n_channels];
3016 request->n_ssids = n_ssids;
3017 if (ie_len) {
3018 if (request->ssids)
3019 request->ie = (void *)(request->ssids + n_ssids);
3020 else
3021 request->ie = (void *)(request->channels + n_channels);
3022 }
3023
3024 i = 0;
3025 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3026 /* user specified, bail out if channel not found */
3027 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3028 struct ieee80211_channel *chan;
3029
3030 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3031
3032 if (!chan) {
3033 err = -EINVAL;
3034 goto out_free;
3035 }
3036
3037 /* ignore disabled channels */
3038 if (chan->flags & IEEE80211_CHAN_DISABLED)
3039 continue;
3040
3041 request->channels[i] = chan;
3042 i++;
3043 }
3044 } else {
3045 /* all channels */
3046 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3047 int j;
3048 if (!wiphy->bands[band])
3049 continue;
3050 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3051 struct ieee80211_channel *chan;
3052
3053 chan = &wiphy->bands[band]->channels[j];
3054
3055 if (chan->flags & IEEE80211_CHAN_DISABLED)
3056 continue;
3057
3058 request->channels[i] = chan;
3059 i++;
3060 }
3061 }
3062 }
3063
3064 if (!i) {
3065 err = -EINVAL;
3066 goto out_free;
3067 }
3068
3069 request->n_channels = i;
3070
3071 i = 0;
3072 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3073 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3074 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3075 err = -EINVAL;
3076 goto out_free;
3077 }
3078 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3079 request->ssids[i].ssid_len = nla_len(attr);
3080 i++;
3081 }
3082 }
3083
3084 if (info->attrs[NL80211_ATTR_IE]) {
3085 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3086 memcpy((void *)request->ie,
3087 nla_data(info->attrs[NL80211_ATTR_IE]),
3088 request->ie_len);
3089 }
3090
3091 request->dev = dev;
3092 request->wiphy = &rdev->wiphy;
3093
3094 rdev->scan_req = request;
3095 err = rdev->ops->scan(&rdev->wiphy, dev, request);
3096
3097 if (!err) {
3098 nl80211_send_scan_start(rdev, dev);
3099 dev_hold(dev);
3100 }
3101
3102 out_free:
3103 if (err) {
3104 rdev->scan_req = NULL;
3105 kfree(request);
3106 }
3107 out:
3108 cfg80211_unlock_rdev(rdev);
3109 dev_put(dev);
3110 out_rtnl:
3111 rtnl_unlock();
3112
3113 return err;
3114 }
3115
3116 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3117 struct cfg80211_registered_device *rdev,
3118 struct wireless_dev *wdev,
3119 struct cfg80211_internal_bss *intbss)
3120 {
3121 struct cfg80211_bss *res = &intbss->pub;
3122 void *hdr;
3123 struct nlattr *bss;
3124 int i;
3125
3126 ASSERT_WDEV_LOCK(wdev);
3127
3128 hdr = nl80211hdr_put(msg, pid, seq, flags,
3129 NL80211_CMD_NEW_SCAN_RESULTS);
3130 if (!hdr)
3131 return -1;
3132
3133 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3134 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3135
3136 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3137 if (!bss)
3138 goto nla_put_failure;
3139 if (!is_zero_ether_addr(res->bssid))
3140 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3141 if (res->information_elements && res->len_information_elements)
3142 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3143 res->len_information_elements,
3144 res->information_elements);
3145 if (res->beacon_ies && res->len_beacon_ies &&
3146 res->beacon_ies != res->information_elements)
3147 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3148 res->len_beacon_ies, res->beacon_ies);
3149 if (res->tsf)
3150 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3151 if (res->beacon_interval)
3152 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3153 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3154 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3155 NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3156 jiffies_to_msecs(jiffies - intbss->ts));
3157
3158 switch (rdev->wiphy.signal_type) {
3159 case CFG80211_SIGNAL_TYPE_MBM:
3160 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3161 break;
3162 case CFG80211_SIGNAL_TYPE_UNSPEC:
3163 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3164 break;
3165 default:
3166 break;
3167 }
3168
3169 switch (wdev->iftype) {
3170 case NL80211_IFTYPE_STATION:
3171 if (intbss == wdev->current_bss)
3172 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3173 NL80211_BSS_STATUS_ASSOCIATED);
3174 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3175 if (intbss != wdev->auth_bsses[i])
3176 continue;
3177 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3178 NL80211_BSS_STATUS_AUTHENTICATED);
3179 break;
3180 }
3181 break;
3182 case NL80211_IFTYPE_ADHOC:
3183 if (intbss == wdev->current_bss)
3184 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3185 NL80211_BSS_STATUS_IBSS_JOINED);
3186 break;
3187 default:
3188 break;
3189 }
3190
3191 nla_nest_end(msg, bss);
3192
3193 return genlmsg_end(msg, hdr);
3194
3195 nla_put_failure:
3196 genlmsg_cancel(msg, hdr);
3197 return -EMSGSIZE;
3198 }
3199
3200 static int nl80211_dump_scan(struct sk_buff *skb,
3201 struct netlink_callback *cb)
3202 {
3203 struct cfg80211_registered_device *rdev;
3204 struct net_device *dev;
3205 struct cfg80211_internal_bss *scan;
3206 struct wireless_dev *wdev;
3207 int ifidx = cb->args[0];
3208 int start = cb->args[1], idx = 0;
3209 int err;
3210
3211 if (!ifidx)
3212 ifidx = nl80211_get_ifidx(cb);
3213 if (ifidx < 0)
3214 return ifidx;
3215 cb->args[0] = ifidx;
3216
3217 dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3218 if (!dev)
3219 return -ENODEV;
3220
3221 rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3222 if (IS_ERR(rdev)) {
3223 err = PTR_ERR(rdev);
3224 goto out_put_netdev;
3225 }
3226
3227 wdev = dev->ieee80211_ptr;
3228
3229 wdev_lock(wdev);
3230 spin_lock_bh(&rdev->bss_lock);
3231 cfg80211_bss_expire(rdev);
3232
3233 list_for_each_entry(scan, &rdev->bss_list, list) {
3234 if (++idx <= start)
3235 continue;
3236 if (nl80211_send_bss(skb,
3237 NETLINK_CB(cb->skb).pid,
3238 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3239 rdev, wdev, scan) < 0) {
3240 idx--;
3241 goto out;
3242 }
3243 }
3244
3245 out:
3246 spin_unlock_bh(&rdev->bss_lock);
3247 wdev_unlock(wdev);
3248
3249 cb->args[1] = idx;
3250 err = skb->len;
3251 cfg80211_unlock_rdev(rdev);
3252 out_put_netdev:
3253 dev_put(dev);
3254
3255 return err;
3256 }
3257
3258 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3259 int flags, struct net_device *dev,
3260 struct survey_info *survey)
3261 {
3262 void *hdr;
3263 struct nlattr *infoattr;
3264
3265 /* Survey without a channel doesn't make sense */
3266 if (!survey->channel)
3267 return -EINVAL;
3268
3269 hdr = nl80211hdr_put(msg, pid, seq, flags,
3270 NL80211_CMD_NEW_SURVEY_RESULTS);
3271 if (!hdr)
3272 return -ENOMEM;
3273
3274 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3275
3276 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3277 if (!infoattr)
3278 goto nla_put_failure;
3279
3280 NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3281 survey->channel->center_freq);
3282 if (survey->filled & SURVEY_INFO_NOISE_DBM)
3283 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3284 survey->noise);
3285
3286 nla_nest_end(msg, infoattr);
3287
3288 return genlmsg_end(msg, hdr);
3289
3290 nla_put_failure:
3291 genlmsg_cancel(msg, hdr);
3292 return -EMSGSIZE;
3293 }
3294
3295 static int nl80211_dump_survey(struct sk_buff *skb,
3296 struct netlink_callback *cb)
3297 {
3298 struct survey_info survey;
3299 struct cfg80211_registered_device *dev;
3300 struct net_device *netdev;
3301 int ifidx = cb->args[0];
3302 int survey_idx = cb->args[1];
3303 int res;
3304
3305 if (!ifidx)
3306 ifidx = nl80211_get_ifidx(cb);
3307 if (ifidx < 0)
3308 return ifidx;
3309 cb->args[0] = ifidx;
3310
3311 rtnl_lock();
3312
3313 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
3314 if (!netdev) {
3315 res = -ENODEV;
3316 goto out_rtnl;
3317 }
3318
3319 dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3320 if (IS_ERR(dev)) {
3321 res = PTR_ERR(dev);
3322 goto out_rtnl;
3323 }
3324
3325 if (!dev->ops->dump_survey) {
3326 res = -EOPNOTSUPP;
3327 goto out_err;
3328 }
3329
3330 while (1) {
3331 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3332 &survey);
3333 if (res == -ENOENT)
3334 break;
3335 if (res)
3336 goto out_err;
3337
3338 if (nl80211_send_survey(skb,
3339 NETLINK_CB(cb->skb).pid,
3340 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3341 netdev,
3342 &survey) < 0)
3343 goto out;
3344 survey_idx++;
3345 }
3346
3347 out:
3348 cb->args[1] = survey_idx;
3349 res = skb->len;
3350 out_err:
3351 cfg80211_unlock_rdev(dev);
3352 out_rtnl:
3353 rtnl_unlock();
3354
3355 return res;
3356 }
3357
3358 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3359 {
3360 return auth_type <= NL80211_AUTHTYPE_MAX;
3361 }
3362
3363 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3364 {
3365 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3366 NL80211_WPA_VERSION_2));
3367 }
3368
3369 static bool nl80211_valid_akm_suite(u32 akm)
3370 {
3371 return akm == WLAN_AKM_SUITE_8021X ||
3372 akm == WLAN_AKM_SUITE_PSK;
3373 }
3374
3375 static bool nl80211_valid_cipher_suite(u32 cipher)
3376 {
3377 return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3378 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3379 cipher == WLAN_CIPHER_SUITE_TKIP ||
3380 cipher == WLAN_CIPHER_SUITE_CCMP ||
3381 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3382 }
3383
3384
3385 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3386 {
3387 struct cfg80211_registered_device *rdev;
3388 struct net_device *dev;
3389 struct ieee80211_channel *chan;
3390 const u8 *bssid, *ssid, *ie = NULL;
3391 int err, ssid_len, ie_len = 0;
3392 enum nl80211_auth_type auth_type;
3393 struct key_parse key;
3394
3395 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3396 return -EINVAL;
3397
3398 if (!info->attrs[NL80211_ATTR_MAC])
3399 return -EINVAL;
3400
3401 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3402 return -EINVAL;
3403
3404 if (!info->attrs[NL80211_ATTR_SSID])
3405 return -EINVAL;
3406
3407 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3408 return -EINVAL;
3409
3410 err = nl80211_parse_key(info, &key);
3411 if (err)
3412 return err;
3413
3414 if (key.idx >= 0) {
3415 if (!key.p.key || !key.p.key_len)
3416 return -EINVAL;
3417 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3418 key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3419 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3420 key.p.key_len != WLAN_KEY_LEN_WEP104))
3421 return -EINVAL;
3422 if (key.idx > 4)
3423 return -EINVAL;
3424 } else {
3425 key.p.key_len = 0;
3426 key.p.key = NULL;
3427 }
3428
3429 rtnl_lock();
3430
3431 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3432 if (err)
3433 goto unlock_rtnl;
3434
3435 if (!rdev->ops->auth) {
3436 err = -EOPNOTSUPP;
3437 goto out;
3438 }
3439
3440 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3441 err = -EOPNOTSUPP;
3442 goto out;
3443 }
3444
3445 if (!netif_running(dev)) {
3446 err = -ENETDOWN;
3447 goto out;
3448 }
3449
3450 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3451 chan = ieee80211_get_channel(&rdev->wiphy,
3452 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3453 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3454 err = -EINVAL;
3455 goto out;
3456 }
3457
3458 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3459 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3460
3461 if (info->attrs[NL80211_ATTR_IE]) {
3462 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3463 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3464 }
3465
3466 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3467 if (!nl80211_valid_auth_type(auth_type)) {
3468 err = -EINVAL;
3469 goto out;
3470 }
3471
3472 err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3473 ssid, ssid_len, ie, ie_len,
3474 key.p.key, key.p.key_len, key.idx);
3475
3476 out:
3477 cfg80211_unlock_rdev(rdev);
3478 dev_put(dev);
3479 unlock_rtnl:
3480 rtnl_unlock();
3481 return err;
3482 }
3483
3484 static int nl80211_crypto_settings(struct genl_info *info,
3485 struct cfg80211_crypto_settings *settings,
3486 int cipher_limit)
3487 {
3488 memset(settings, 0, sizeof(*settings));
3489
3490 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3491
3492 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3493 void *data;
3494 int len, i;
3495
3496 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3497 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3498 settings->n_ciphers_pairwise = len / sizeof(u32);
3499
3500 if (len % sizeof(u32))
3501 return -EINVAL;
3502
3503 if (settings->n_ciphers_pairwise > cipher_limit)
3504 return -EINVAL;
3505
3506 memcpy(settings->ciphers_pairwise, data, len);
3507
3508 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3509 if (!nl80211_valid_cipher_suite(
3510 settings->ciphers_pairwise[i]))
3511 return -EINVAL;
3512 }
3513
3514 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3515 settings->cipher_group =
3516 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3517 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3518 return -EINVAL;
3519 }
3520
3521 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3522 settings->wpa_versions =
3523 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3524 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3525 return -EINVAL;
3526 }
3527
3528 if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3529 void *data;
3530 int len, i;
3531
3532 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3533 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3534 settings->n_akm_suites = len / sizeof(u32);
3535
3536 if (len % sizeof(u32))
3537 return -EINVAL;
3538
3539 memcpy(settings->akm_suites, data, len);
3540
3541 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3542 if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3543 return -EINVAL;
3544 }
3545
3546 return 0;
3547 }
3548
3549 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3550 {
3551 struct cfg80211_registered_device *rdev;
3552 struct net_device *dev;
3553 struct wireless_dev *wdev;
3554 struct cfg80211_crypto_settings crypto;
3555 struct ieee80211_channel *chan, *fixedchan;
3556 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3557 int err, ssid_len, ie_len = 0;
3558 bool use_mfp = false;
3559
3560 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3561 return -EINVAL;
3562
3563 if (!info->attrs[NL80211_ATTR_MAC] ||
3564 !info->attrs[NL80211_ATTR_SSID] ||
3565 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3566 return -EINVAL;
3567
3568 rtnl_lock();
3569
3570 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3571 if (err)
3572 goto unlock_rtnl;
3573
3574 if (!rdev->ops->assoc) {
3575 err = -EOPNOTSUPP;
3576 goto out;
3577 }
3578
3579 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3580 err = -EOPNOTSUPP;
3581 goto out;
3582 }
3583
3584 if (!netif_running(dev)) {
3585 err = -ENETDOWN;
3586 goto out;
3587 }
3588
3589 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3590
3591 chan = ieee80211_get_channel(&rdev->wiphy,
3592 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3593 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3594 err = -EINVAL;
3595 goto out;
3596 }
3597
3598 mutex_lock(&rdev->devlist_mtx);
3599 wdev = dev->ieee80211_ptr;
3600 fixedchan = rdev_fixed_channel(rdev, wdev);
3601 if (fixedchan && chan != fixedchan) {
3602 err = -EBUSY;
3603 mutex_unlock(&rdev->devlist_mtx);
3604 goto out;
3605 }
3606 mutex_unlock(&rdev->devlist_mtx);
3607
3608 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3609 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3610
3611 if (info->attrs[NL80211_ATTR_IE]) {
3612 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3613 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3614 }
3615
3616 if (info->attrs[NL80211_ATTR_USE_MFP]) {
3617 enum nl80211_mfp mfp =
3618 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3619 if (mfp == NL80211_MFP_REQUIRED)
3620 use_mfp = true;
3621 else if (mfp != NL80211_MFP_NO) {
3622 err = -EINVAL;
3623 goto out;
3624 }
3625 }
3626
3627 if (info->attrs[NL80211_ATTR_PREV_BSSID])
3628 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3629
3630 err = nl80211_crypto_settings(info, &crypto, 1);
3631 if (!err)
3632 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3633 ssid, ssid_len, ie, ie_len, use_mfp,
3634 &crypto);
3635
3636 out:
3637 cfg80211_unlock_rdev(rdev);
3638 dev_put(dev);
3639 unlock_rtnl:
3640 rtnl_unlock();
3641 return err;
3642 }
3643
3644 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3645 {
3646 struct cfg80211_registered_device *rdev;
3647 struct net_device *dev;
3648 const u8 *ie = NULL, *bssid;
3649 int err, ie_len = 0;
3650 u16 reason_code;
3651
3652 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3653 return -EINVAL;
3654
3655 if (!info->attrs[NL80211_ATTR_MAC])
3656 return -EINVAL;
3657
3658 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3659 return -EINVAL;
3660
3661 rtnl_lock();
3662
3663 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3664 if (err)
3665 goto unlock_rtnl;
3666
3667 if (!rdev->ops->deauth) {
3668 err = -EOPNOTSUPP;
3669 goto out;
3670 }
3671
3672 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3673 err = -EOPNOTSUPP;
3674 goto out;
3675 }
3676
3677 if (!netif_running(dev)) {
3678 err = -ENETDOWN;
3679 goto out;
3680 }
3681
3682 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3683
3684 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3685 if (reason_code == 0) {
3686 /* Reason Code 0 is reserved */
3687 err = -EINVAL;
3688 goto out;
3689 }
3690
3691 if (info->attrs[NL80211_ATTR_IE]) {
3692 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3693 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3694 }
3695
3696 err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3697
3698 out:
3699 cfg80211_unlock_rdev(rdev);
3700 dev_put(dev);
3701 unlock_rtnl:
3702 rtnl_unlock();
3703 return err;
3704 }
3705
3706 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3707 {
3708 struct cfg80211_registered_device *rdev;
3709 struct net_device *dev;
3710 const u8 *ie = NULL, *bssid;
3711 int err, ie_len = 0;
3712 u16 reason_code;
3713
3714 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3715 return -EINVAL;
3716
3717 if (!info->attrs[NL80211_ATTR_MAC])
3718 return -EINVAL;
3719
3720 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3721 return -EINVAL;
3722
3723 rtnl_lock();
3724
3725 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3726 if (err)
3727 goto unlock_rtnl;
3728
3729 if (!rdev->ops->disassoc) {
3730 err = -EOPNOTSUPP;
3731 goto out;
3732 }
3733
3734 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3735 err = -EOPNOTSUPP;
3736 goto out;
3737 }
3738
3739 if (!netif_running(dev)) {
3740 err = -ENETDOWN;
3741 goto out;
3742 }
3743
3744 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3745
3746 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3747 if (reason_code == 0) {
3748 /* Reason Code 0 is reserved */
3749 err = -EINVAL;
3750 goto out;
3751 }
3752
3753 if (info->attrs[NL80211_ATTR_IE]) {
3754 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3755 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3756 }
3757
3758 err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3759
3760 out:
3761 cfg80211_unlock_rdev(rdev);
3762 dev_put(dev);
3763 unlock_rtnl:
3764 rtnl_unlock();
3765 return err;
3766 }
3767
3768 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3769 {
3770 struct cfg80211_registered_device *rdev;
3771 struct net_device *dev;
3772 struct cfg80211_ibss_params ibss;
3773 struct wiphy *wiphy;
3774 struct cfg80211_cached_keys *connkeys = NULL;
3775 int err;
3776
3777 memset(&ibss, 0, sizeof(ibss));
3778
3779 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3780 return -EINVAL;
3781
3782 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3783 !info->attrs[NL80211_ATTR_SSID] ||
3784 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3785 return -EINVAL;
3786
3787 ibss.beacon_interval = 100;
3788
3789 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3790 ibss.beacon_interval =
3791 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3792 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3793 return -EINVAL;
3794 }
3795
3796 rtnl_lock();
3797
3798 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3799 if (err)
3800 goto unlock_rtnl;
3801
3802 if (!rdev->ops->join_ibss) {
3803 err = -EOPNOTSUPP;
3804 goto out;
3805 }
3806
3807 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3808 err = -EOPNOTSUPP;
3809 goto out;
3810 }
3811
3812 if (!netif_running(dev)) {
3813 err = -ENETDOWN;
3814 goto out;
3815 }
3816
3817 wiphy = &rdev->wiphy;
3818
3819 if (info->attrs[NL80211_ATTR_MAC])
3820 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3821 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3822 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3823
3824 if (info->attrs[NL80211_ATTR_IE]) {
3825 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3826 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3827 }
3828
3829 ibss.channel = ieee80211_get_channel(wiphy,
3830 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3831 if (!ibss.channel ||
3832 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3833 ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3834 err = -EINVAL;
3835 goto out;
3836 }
3837
3838 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3839 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3840
3841 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3842 connkeys = nl80211_parse_connkeys(rdev,
3843 info->attrs[NL80211_ATTR_KEYS]);
3844 if (IS_ERR(connkeys)) {
3845 err = PTR_ERR(connkeys);
3846 connkeys = NULL;
3847 goto out;
3848 }
3849 }
3850
3851 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3852
3853 out:
3854 cfg80211_unlock_rdev(rdev);
3855 dev_put(dev);
3856 unlock_rtnl:
3857 if (err)
3858 kfree(connkeys);
3859 rtnl_unlock();
3860 return err;
3861 }
3862
3863 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3864 {
3865 struct cfg80211_registered_device *rdev;
3866 struct net_device *dev;
3867 int err;
3868
3869 rtnl_lock();
3870
3871 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3872 if (err)
3873 goto unlock_rtnl;
3874
3875 if (!rdev->ops->leave_ibss) {
3876 err = -EOPNOTSUPP;
3877 goto out;
3878 }
3879
3880 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3881 err = -EOPNOTSUPP;
3882 goto out;
3883 }
3884
3885 if (!netif_running(dev)) {
3886 err = -ENETDOWN;
3887 goto out;
3888 }
3889
3890 err = cfg80211_leave_ibss(rdev, dev, false);
3891
3892 out:
3893 cfg80211_unlock_rdev(rdev);
3894 dev_put(dev);
3895 unlock_rtnl:
3896 rtnl_unlock();
3897 return err;
3898 }
3899
3900 #ifdef CONFIG_NL80211_TESTMODE
3901 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3902 .name = "testmode",
3903 };
3904
3905 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3906 {
3907 struct cfg80211_registered_device *rdev;
3908 int err;
3909
3910 if (!info->attrs[NL80211_ATTR_TESTDATA])
3911 return -EINVAL;
3912
3913 rtnl_lock();
3914
3915 rdev = cfg80211_get_dev_from_info(info);
3916 if (IS_ERR(rdev)) {
3917 err = PTR_ERR(rdev);
3918 goto unlock_rtnl;
3919 }
3920
3921 err = -EOPNOTSUPP;
3922 if (rdev->ops->testmode_cmd) {
3923 rdev->testmode_info = info;
3924 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3925 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3926 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3927 rdev->testmode_info = NULL;
3928 }
3929
3930 cfg80211_unlock_rdev(rdev);
3931
3932 unlock_rtnl:
3933 rtnl_unlock();
3934 return err;
3935 }
3936
3937 static struct sk_buff *
3938 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3939 int approxlen, u32 pid, u32 seq, gfp_t gfp)
3940 {
3941 struct sk_buff *skb;
3942 void *hdr;
3943 struct nlattr *data;
3944
3945 skb = nlmsg_new(approxlen + 100, gfp);
3946 if (!skb)
3947 return NULL;
3948
3949 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3950 if (!hdr) {
3951 kfree_skb(skb);
3952 return NULL;
3953 }
3954
3955 NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3956 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3957
3958 ((void **)skb->cb)[0] = rdev;
3959 ((void **)skb->cb)[1] = hdr;
3960 ((void **)skb->cb)[2] = data;
3961
3962 return skb;
3963
3964 nla_put_failure:
3965 kfree_skb(skb);
3966 return NULL;
3967 }
3968
3969 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3970 int approxlen)
3971 {
3972 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3973
3974 if (WARN_ON(!rdev->testmode_info))
3975 return NULL;
3976
3977 return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3978 rdev->testmode_info->snd_pid,
3979 rdev->testmode_info->snd_seq,
3980 GFP_KERNEL);
3981 }
3982 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3983
3984 int cfg80211_testmode_reply(struct sk_buff *skb)
3985 {
3986 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3987 void *hdr = ((void **)skb->cb)[1];
3988 struct nlattr *data = ((void **)skb->cb)[2];
3989
3990 if (WARN_ON(!rdev->testmode_info)) {
3991 kfree_skb(skb);
3992 return -EINVAL;
3993 }
3994
3995 nla_nest_end(skb, data);
3996 genlmsg_end(skb, hdr);
3997 return genlmsg_reply(skb, rdev->testmode_info);
3998 }
3999 EXPORT_SYMBOL(cfg80211_testmode_reply);
4000
4001 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4002 int approxlen, gfp_t gfp)
4003 {
4004 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4005
4006 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4007 }
4008 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4009
4010 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4011 {
4012 void *hdr = ((void **)skb->cb)[1];
4013 struct nlattr *data = ((void **)skb->cb)[2];
4014
4015 nla_nest_end(skb, data);
4016 genlmsg_end(skb, hdr);
4017 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4018 }
4019 EXPORT_SYMBOL(cfg80211_testmode_event);
4020 #endif
4021
4022 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4023 {
4024 struct cfg80211_registered_device *rdev;
4025 struct net_device *dev;
4026 struct cfg80211_connect_params connect;
4027 struct wiphy *wiphy;
4028 struct cfg80211_cached_keys *connkeys = NULL;
4029 int err;
4030
4031 memset(&connect, 0, sizeof(connect));
4032
4033 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4034 return -EINVAL;
4035
4036 if (!info->attrs[NL80211_ATTR_SSID] ||
4037 !nla_len(info->attrs[NL80211_ATTR_SSID]))
4038 return -EINVAL;
4039
4040 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4041 connect.auth_type =
4042 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4043 if (!nl80211_valid_auth_type(connect.auth_type))
4044 return -EINVAL;
4045 } else
4046 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4047
4048 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4049
4050 err = nl80211_crypto_settings(info, &connect.crypto,
4051 NL80211_MAX_NR_CIPHER_SUITES);
4052 if (err)
4053 return err;
4054 rtnl_lock();
4055
4056 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4057 if (err)
4058 goto unlock_rtnl;
4059
4060 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4061 err = -EOPNOTSUPP;
4062 goto out;
4063 }
4064
4065 if (!netif_running(dev)) {
4066 err = -ENETDOWN;
4067 goto out;
4068 }
4069
4070 wiphy = &rdev->wiphy;
4071
4072 if (info->attrs[NL80211_ATTR_MAC])
4073 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4074 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4075 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4076
4077 if (info->attrs[NL80211_ATTR_IE]) {
4078 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4079 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4080 }
4081
4082 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4083 connect.channel =
4084 ieee80211_get_channel(wiphy,
4085 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4086 if (!connect.channel ||
4087 connect.channel->flags & IEEE80211_CHAN_DISABLED) {
4088 err = -EINVAL;
4089 goto out;
4090 }
4091 }
4092
4093 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4094 connkeys = nl80211_parse_connkeys(rdev,
4095 info->attrs[NL80211_ATTR_KEYS]);
4096 if (IS_ERR(connkeys)) {
4097 err = PTR_ERR(connkeys);
4098 connkeys = NULL;
4099 goto out;
4100 }
4101 }
4102
4103 err = cfg80211_connect(rdev, dev, &connect, connkeys);
4104
4105 out:
4106 cfg80211_unlock_rdev(rdev);
4107 dev_put(dev);
4108 unlock_rtnl:
4109 if (err)
4110 kfree(connkeys);
4111 rtnl_unlock();
4112 return err;
4113 }
4114
4115 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4116 {
4117 struct cfg80211_registered_device *rdev;
4118 struct net_device *dev;
4119 int err;
4120 u16 reason;
4121
4122 if (!info->attrs[NL80211_ATTR_REASON_CODE])
4123 reason = WLAN_REASON_DEAUTH_LEAVING;
4124 else
4125 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4126
4127 if (reason == 0)
4128 return -EINVAL;
4129
4130 rtnl_lock();
4131
4132 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4133 if (err)
4134 goto unlock_rtnl;
4135
4136 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4137 err = -EOPNOTSUPP;
4138 goto out;
4139 }
4140
4141 if (!netif_running(dev)) {
4142 err = -ENETDOWN;
4143 goto out;
4144 }
4145
4146 err = cfg80211_disconnect(rdev, dev, reason, true);
4147
4148 out:
4149 cfg80211_unlock_rdev(rdev);
4150 dev_put(dev);
4151 unlock_rtnl:
4152 rtnl_unlock();
4153 return err;
4154 }
4155
4156 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4157 {
4158 struct cfg80211_registered_device *rdev;
4159 struct net *net;
4160 int err;
4161 u32 pid;
4162
4163 if (!info->attrs[NL80211_ATTR_PID])
4164 return -EINVAL;
4165
4166 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4167
4168 rtnl_lock();
4169
4170 rdev = cfg80211_get_dev_from_info(info);
4171 if (IS_ERR(rdev)) {
4172 err = PTR_ERR(rdev);
4173 goto out_rtnl;
4174 }
4175
4176 net = get_net_ns_by_pid(pid);
4177 if (IS_ERR(net)) {
4178 err = PTR_ERR(net);
4179 goto out;
4180 }
4181
4182 err = 0;
4183
4184 /* check if anything to do */
4185 if (net_eq(wiphy_net(&rdev->wiphy), net))
4186 goto out_put_net;
4187
4188 err = cfg80211_switch_netns(rdev, net);
4189 out_put_net:
4190 put_net(net);
4191 out:
4192 cfg80211_unlock_rdev(rdev);
4193 out_rtnl:
4194 rtnl_unlock();
4195 return err;
4196 }
4197
4198 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4199 {
4200 struct cfg80211_registered_device *rdev;
4201 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4202 struct cfg80211_pmksa *pmksa) = NULL;
4203 int err;
4204 struct net_device *dev;
4205 struct cfg80211_pmksa pmksa;
4206
4207 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4208
4209 if (!info->attrs[NL80211_ATTR_MAC])
4210 return -EINVAL;
4211
4212 if (!info->attrs[NL80211_ATTR_PMKID])
4213 return -EINVAL;
4214
4215 rtnl_lock();
4216
4217 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4218 if (err)
4219 goto out_rtnl;
4220
4221 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4222 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4223
4224 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4225 err = -EOPNOTSUPP;
4226 goto out;
4227 }
4228
4229 switch (info->genlhdr->cmd) {
4230 case NL80211_CMD_SET_PMKSA:
4231 rdev_ops = rdev->ops->set_pmksa;
4232 break;
4233 case NL80211_CMD_DEL_PMKSA:
4234 rdev_ops = rdev->ops->del_pmksa;
4235 break;
4236 default:
4237 WARN_ON(1);
4238 break;
4239 }
4240
4241 if (!rdev_ops) {
4242 err = -EOPNOTSUPP;
4243 goto out;
4244 }
4245
4246 err = rdev_ops(&rdev->wiphy, dev, &pmksa);
4247
4248 out:
4249 cfg80211_unlock_rdev(rdev);
4250 dev_put(dev);
4251 out_rtnl:
4252 rtnl_unlock();
4253
4254 return err;
4255 }
4256
4257 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4258 {
4259 struct cfg80211_registered_device *rdev;
4260 int err;
4261 struct net_device *dev;
4262
4263 rtnl_lock();
4264
4265 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4266 if (err)
4267 goto out_rtnl;
4268
4269 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4270 err = -EOPNOTSUPP;
4271 goto out;
4272 }
4273
4274 if (!rdev->ops->flush_pmksa) {
4275 err = -EOPNOTSUPP;
4276 goto out;
4277 }
4278
4279 err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4280
4281 out:
4282 cfg80211_unlock_rdev(rdev);
4283 dev_put(dev);
4284 out_rtnl:
4285 rtnl_unlock();
4286
4287 return err;
4288
4289 }
4290
4291 static int nl80211_remain_on_channel(struct sk_buff *skb,
4292 struct genl_info *info)
4293 {
4294 struct cfg80211_registered_device *rdev;
4295 struct net_device *dev;
4296 struct ieee80211_channel *chan;
4297 struct sk_buff *msg;
4298 void *hdr;
4299 u64 cookie;
4300 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4301 u32 freq, duration;
4302 int err;
4303
4304 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4305 !info->attrs[NL80211_ATTR_DURATION])
4306 return -EINVAL;
4307
4308 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4309
4310 /*
4311 * We should be on that channel for at least one jiffie,
4312 * and more than 5 seconds seems excessive.
4313 */
4314 if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4315 return -EINVAL;
4316
4317 rtnl_lock();
4318
4319 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4320 if (err)
4321 goto unlock_rtnl;
4322
4323 if (!rdev->ops->remain_on_channel) {
4324 err = -EOPNOTSUPP;
4325 goto out;
4326 }
4327
4328 if (!netif_running(dev)) {
4329 err = -ENETDOWN;
4330 goto out;
4331 }
4332
4333 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4334 channel_type = nla_get_u32(
4335 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4336 if (channel_type != NL80211_CHAN_NO_HT &&
4337 channel_type != NL80211_CHAN_HT20 &&
4338 channel_type != NL80211_CHAN_HT40PLUS &&
4339 channel_type != NL80211_CHAN_HT40MINUS)
4340 err = -EINVAL;
4341 goto out;
4342 }
4343
4344 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4345 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4346 if (chan == NULL) {
4347 err = -EINVAL;
4348 goto out;
4349 }
4350
4351 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4352 if (!msg) {
4353 err = -ENOMEM;
4354 goto out;
4355 }
4356
4357 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4358 NL80211_CMD_REMAIN_ON_CHANNEL);
4359
4360 if (IS_ERR(hdr)) {
4361 err = PTR_ERR(hdr);
4362 goto free_msg;
4363 }
4364
4365 err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4366 channel_type, duration, &cookie);
4367
4368 if (err)
4369 goto free_msg;
4370
4371 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4372
4373 genlmsg_end(msg, hdr);
4374 err = genlmsg_reply(msg, info);
4375 goto out;
4376
4377 nla_put_failure:
4378 err = -ENOBUFS;
4379 free_msg:
4380 nlmsg_free(msg);
4381 out:
4382 cfg80211_unlock_rdev(rdev);
4383 dev_put(dev);
4384 unlock_rtnl:
4385 rtnl_unlock();
4386 return err;
4387 }
4388
4389 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4390 struct genl_info *info)
4391 {
4392 struct cfg80211_registered_device *rdev;
4393 struct net_device *dev;
4394 u64 cookie;
4395 int err;
4396
4397 if (!info->attrs[NL80211_ATTR_COOKIE])
4398 return -EINVAL;
4399
4400 rtnl_lock();
4401
4402 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4403 if (err)
4404 goto unlock_rtnl;
4405
4406 if (!rdev->ops->cancel_remain_on_channel) {
4407 err = -EOPNOTSUPP;
4408 goto out;
4409 }
4410
4411 if (!netif_running(dev)) {
4412 err = -ENETDOWN;
4413 goto out;
4414 }
4415
4416 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4417
4418 err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4419
4420 out:
4421 cfg80211_unlock_rdev(rdev);
4422 dev_put(dev);
4423 unlock_rtnl:
4424 rtnl_unlock();
4425 return err;
4426 }
4427
4428 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4429 u8 *rates, u8 rates_len)
4430 {
4431 u8 i;
4432 u32 mask = 0;
4433
4434 for (i = 0; i < rates_len; i++) {
4435 int rate = (rates[i] & 0x7f) * 5;
4436 int ridx;
4437 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4438 struct ieee80211_rate *srate =
4439 &sband->bitrates[ridx];
4440 if (rate == srate->bitrate) {
4441 mask |= 1 << ridx;
4442 break;
4443 }
4444 }
4445 if (ridx == sband->n_bitrates)
4446 return 0; /* rate not found */
4447 }
4448
4449 return mask;
4450 }
4451
4452 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4453 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4454 .len = NL80211_MAX_SUPP_RATES },
4455 };
4456
4457 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4458 struct genl_info *info)
4459 {
4460 struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4461 struct cfg80211_registered_device *rdev;
4462 struct cfg80211_bitrate_mask mask;
4463 int err, rem, i;
4464 struct net_device *dev;
4465 struct nlattr *tx_rates;
4466 struct ieee80211_supported_band *sband;
4467
4468 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4469 return -EINVAL;
4470
4471 rtnl_lock();
4472
4473 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4474 if (err)
4475 goto unlock_rtnl;
4476
4477 if (!rdev->ops->set_bitrate_mask) {
4478 err = -EOPNOTSUPP;
4479 goto unlock;
4480 }
4481
4482 memset(&mask, 0, sizeof(mask));
4483 /* Default to all rates enabled */
4484 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4485 sband = rdev->wiphy.bands[i];
4486 mask.control[i].legacy =
4487 sband ? (1 << sband->n_bitrates) - 1 : 0;
4488 }
4489
4490 /*
4491 * The nested attribute uses enum nl80211_band as the index. This maps
4492 * directly to the enum ieee80211_band values used in cfg80211.
4493 */
4494 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4495 {
4496 enum ieee80211_band band = nla_type(tx_rates);
4497 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4498 err = -EINVAL;
4499 goto unlock;
4500 }
4501 sband = rdev->wiphy.bands[band];
4502 if (sband == NULL) {
4503 err = -EINVAL;
4504 goto unlock;
4505 }
4506 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4507 nla_len(tx_rates), nl80211_txattr_policy);
4508 if (tb[NL80211_TXRATE_LEGACY]) {
4509 mask.control[band].legacy = rateset_to_mask(
4510 sband,
4511 nla_data(tb[NL80211_TXRATE_LEGACY]),
4512 nla_len(tb[NL80211_TXRATE_LEGACY]));
4513 if (mask.control[band].legacy == 0) {
4514 err = -EINVAL;
4515 goto unlock;
4516 }
4517 }
4518 }
4519
4520 err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4521
4522 unlock:
4523 dev_put(dev);
4524 cfg80211_unlock_rdev(rdev);
4525 unlock_rtnl:
4526 rtnl_unlock();
4527 return err;
4528 }
4529
4530 static int nl80211_register_action(struct sk_buff *skb, struct genl_info *info)
4531 {
4532 struct cfg80211_registered_device *rdev;
4533 struct net_device *dev;
4534 int err;
4535
4536 if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4537 return -EINVAL;
4538
4539 if (nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]) < 1)
4540 return -EINVAL;
4541
4542 rtnl_lock();
4543
4544 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4545 if (err)
4546 goto unlock_rtnl;
4547
4548 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4549 err = -EOPNOTSUPP;
4550 goto out;
4551 }
4552
4553 /* not much point in registering if we can't reply */
4554 if (!rdev->ops->action) {
4555 err = -EOPNOTSUPP;
4556 goto out;
4557 }
4558
4559 err = cfg80211_mlme_register_action(dev->ieee80211_ptr, info->snd_pid,
4560 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4561 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4562 out:
4563 cfg80211_unlock_rdev(rdev);
4564 dev_put(dev);
4565 unlock_rtnl:
4566 rtnl_unlock();
4567 return err;
4568 }
4569
4570 static int nl80211_action(struct sk_buff *skb, struct genl_info *info)
4571 {
4572 struct cfg80211_registered_device *rdev;
4573 struct net_device *dev;
4574 struct ieee80211_channel *chan;
4575 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4576 u32 freq;
4577 int err;
4578 void *hdr;
4579 u64 cookie;
4580 struct sk_buff *msg;
4581
4582 if (!info->attrs[NL80211_ATTR_FRAME] ||
4583 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4584 return -EINVAL;
4585
4586 rtnl_lock();
4587
4588 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4589 if (err)
4590 goto unlock_rtnl;
4591
4592 if (!rdev->ops->action) {
4593 err = -EOPNOTSUPP;
4594 goto out;
4595 }
4596
4597 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4598 err = -EOPNOTSUPP;
4599 goto out;
4600 }
4601
4602 if (!netif_running(dev)) {
4603 err = -ENETDOWN;
4604 goto out;
4605 }
4606
4607 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4608 channel_type = nla_get_u32(
4609 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4610 if (channel_type != NL80211_CHAN_NO_HT &&
4611 channel_type != NL80211_CHAN_HT20 &&
4612 channel_type != NL80211_CHAN_HT40PLUS &&
4613 channel_type != NL80211_CHAN_HT40MINUS)
4614 err = -EINVAL;
4615 goto out;
4616 }
4617
4618 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4619 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4620 if (chan == NULL) {
4621 err = -EINVAL;
4622 goto out;
4623 }
4624
4625 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4626 if (!msg) {
4627 err = -ENOMEM;
4628 goto out;
4629 }
4630
4631 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4632 NL80211_CMD_ACTION);
4633
4634 if (IS_ERR(hdr)) {
4635 err = PTR_ERR(hdr);
4636 goto free_msg;
4637 }
4638 err = cfg80211_mlme_action(rdev, dev, chan, channel_type,
4639 nla_data(info->attrs[NL80211_ATTR_FRAME]),
4640 nla_len(info->attrs[NL80211_ATTR_FRAME]),
4641 &cookie);
4642 if (err)
4643 goto free_msg;
4644
4645 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4646
4647 genlmsg_end(msg, hdr);
4648 err = genlmsg_reply(msg, info);
4649 goto out;
4650
4651 nla_put_failure:
4652 err = -ENOBUFS;
4653 free_msg:
4654 nlmsg_free(msg);
4655 out:
4656 cfg80211_unlock_rdev(rdev);
4657 dev_put(dev);
4658 unlock_rtnl:
4659 rtnl_unlock();
4660 return err;
4661 }
4662
4663 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4664 {
4665 struct cfg80211_registered_device *rdev;
4666 struct wireless_dev *wdev;
4667 struct net_device *dev;
4668 u8 ps_state;
4669 bool state;
4670 int err;
4671
4672 if (!info->attrs[NL80211_ATTR_PS_STATE]) {
4673 err = -EINVAL;
4674 goto out;
4675 }
4676
4677 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4678
4679 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) {
4680 err = -EINVAL;
4681 goto out;
4682 }
4683
4684 rtnl_lock();
4685
4686 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4687 if (err)
4688 goto unlock_rdev;
4689
4690 wdev = dev->ieee80211_ptr;
4691
4692 if (!rdev->ops->set_power_mgmt) {
4693 err = -EOPNOTSUPP;
4694 goto unlock_rdev;
4695 }
4696
4697 state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4698
4699 if (state == wdev->ps)
4700 goto unlock_rdev;
4701
4702 wdev->ps = state;
4703
4704 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, wdev->ps,
4705 wdev->ps_timeout))
4706 /* assume this means it's off */
4707 wdev->ps = false;
4708
4709 unlock_rdev:
4710 cfg80211_unlock_rdev(rdev);
4711 dev_put(dev);
4712 rtnl_unlock();
4713
4714 out:
4715 return err;
4716 }
4717
4718 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4719 {
4720 struct cfg80211_registered_device *rdev;
4721 enum nl80211_ps_state ps_state;
4722 struct wireless_dev *wdev;
4723 struct net_device *dev;
4724 struct sk_buff *msg;
4725 void *hdr;
4726 int err;
4727
4728 rtnl_lock();
4729
4730 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4731 if (err)
4732 goto unlock_rtnl;
4733
4734 wdev = dev->ieee80211_ptr;
4735
4736 if (!rdev->ops->set_power_mgmt) {
4737 err = -EOPNOTSUPP;
4738 goto out;
4739 }
4740
4741 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4742 if (!msg) {
4743 err = -ENOMEM;
4744 goto out;
4745 }
4746
4747 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4748 NL80211_CMD_GET_POWER_SAVE);
4749 if (!hdr) {
4750 err = -ENOMEM;
4751 goto free_msg;
4752 }
4753
4754 if (wdev->ps)
4755 ps_state = NL80211_PS_ENABLED;
4756 else
4757 ps_state = NL80211_PS_DISABLED;
4758
4759 NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4760
4761 genlmsg_end(msg, hdr);
4762 err = genlmsg_reply(msg, info);
4763 goto out;
4764
4765 nla_put_failure:
4766 err = -ENOBUFS;
4767
4768 free_msg:
4769 nlmsg_free(msg);
4770
4771 out:
4772 cfg80211_unlock_rdev(rdev);
4773 dev_put(dev);
4774
4775 unlock_rtnl:
4776 rtnl_unlock();
4777
4778 return err;
4779 }
4780
4781 static struct genl_ops nl80211_ops[] = {
4782 {
4783 .cmd = NL80211_CMD_GET_WIPHY,
4784 .doit = nl80211_get_wiphy,
4785 .dumpit = nl80211_dump_wiphy,
4786 .policy = nl80211_policy,
4787 /* can be retrieved by unprivileged users */
4788 },
4789 {
4790 .cmd = NL80211_CMD_SET_WIPHY,
4791 .doit = nl80211_set_wiphy,
4792 .policy = nl80211_policy,
4793 .flags = GENL_ADMIN_PERM,
4794 },
4795 {
4796 .cmd = NL80211_CMD_GET_INTERFACE,
4797 .doit = nl80211_get_interface,
4798 .dumpit = nl80211_dump_interface,
4799 .policy = nl80211_policy,
4800 /* can be retrieved by unprivileged users */
4801 },
4802 {
4803 .cmd = NL80211_CMD_SET_INTERFACE,
4804 .doit = nl80211_set_interface,
4805 .policy = nl80211_policy,
4806 .flags = GENL_ADMIN_PERM,
4807 },
4808 {
4809 .cmd = NL80211_CMD_NEW_INTERFACE,
4810 .doit = nl80211_new_interface,
4811 .policy = nl80211_policy,
4812 .flags = GENL_ADMIN_PERM,
4813 },
4814 {
4815 .cmd = NL80211_CMD_DEL_INTERFACE,
4816 .doit = nl80211_del_interface,
4817 .policy = nl80211_policy,
4818 .flags = GENL_ADMIN_PERM,
4819 },
4820 {
4821 .cmd = NL80211_CMD_GET_KEY,
4822 .doit = nl80211_get_key,
4823 .policy = nl80211_policy,
4824 .flags = GENL_ADMIN_PERM,
4825 },
4826 {
4827 .cmd = NL80211_CMD_SET_KEY,
4828 .doit = nl80211_set_key,
4829 .policy = nl80211_policy,
4830 .flags = GENL_ADMIN_PERM,
4831 },
4832 {
4833 .cmd = NL80211_CMD_NEW_KEY,
4834 .doit = nl80211_new_key,
4835 .policy = nl80211_policy,
4836 .flags = GENL_ADMIN_PERM,
4837 },
4838 {
4839 .cmd = NL80211_CMD_DEL_KEY,
4840 .doit = nl80211_del_key,
4841 .policy = nl80211_policy,
4842 .flags = GENL_ADMIN_PERM,
4843 },
4844 {
4845 .cmd = NL80211_CMD_SET_BEACON,
4846 .policy = nl80211_policy,
4847 .flags = GENL_ADMIN_PERM,
4848 .doit = nl80211_addset_beacon,
4849 },
4850 {
4851 .cmd = NL80211_CMD_NEW_BEACON,
4852 .policy = nl80211_policy,
4853 .flags = GENL_ADMIN_PERM,
4854 .doit = nl80211_addset_beacon,
4855 },
4856 {
4857 .cmd = NL80211_CMD_DEL_BEACON,
4858 .policy = nl80211_policy,
4859 .flags = GENL_ADMIN_PERM,
4860 .doit = nl80211_del_beacon,
4861 },
4862 {
4863 .cmd = NL80211_CMD_GET_STATION,
4864 .doit = nl80211_get_station,
4865 .dumpit = nl80211_dump_station,
4866 .policy = nl80211_policy,
4867 },
4868 {
4869 .cmd = NL80211_CMD_SET_STATION,
4870 .doit = nl80211_set_station,
4871 .policy = nl80211_policy,
4872 .flags = GENL_ADMIN_PERM,
4873 },
4874 {
4875 .cmd = NL80211_CMD_NEW_STATION,
4876 .doit = nl80211_new_station,
4877 .policy = nl80211_policy,
4878 .flags = GENL_ADMIN_PERM,
4879 },
4880 {
4881 .cmd = NL80211_CMD_DEL_STATION,
4882 .doit = nl80211_del_station,
4883 .policy = nl80211_policy,
4884 .flags = GENL_ADMIN_PERM,
4885 },
4886 {
4887 .cmd = NL80211_CMD_GET_MPATH,
4888 .doit = nl80211_get_mpath,
4889 .dumpit = nl80211_dump_mpath,
4890 .policy = nl80211_policy,
4891 .flags = GENL_ADMIN_PERM,
4892 },
4893 {
4894 .cmd = NL80211_CMD_SET_MPATH,
4895 .doit = nl80211_set_mpath,
4896 .policy = nl80211_policy,
4897 .flags = GENL_ADMIN_PERM,
4898 },
4899 {
4900 .cmd = NL80211_CMD_NEW_MPATH,
4901 .doit = nl80211_new_mpath,
4902 .policy = nl80211_policy,
4903 .flags = GENL_ADMIN_PERM,
4904 },
4905 {
4906 .cmd = NL80211_CMD_DEL_MPATH,
4907 .doit = nl80211_del_mpath,
4908 .policy = nl80211_policy,
4909 .flags = GENL_ADMIN_PERM,
4910 },
4911 {
4912 .cmd = NL80211_CMD_SET_BSS,
4913 .doit = nl80211_set_bss,
4914 .policy = nl80211_policy,
4915 .flags = GENL_ADMIN_PERM,
4916 },
4917 {
4918 .cmd = NL80211_CMD_GET_REG,
4919 .doit = nl80211_get_reg,
4920 .policy = nl80211_policy,
4921 /* can be retrieved by unprivileged users */
4922 },
4923 {
4924 .cmd = NL80211_CMD_SET_REG,
4925 .doit = nl80211_set_reg,
4926 .policy = nl80211_policy,
4927 .flags = GENL_ADMIN_PERM,
4928 },
4929 {
4930 .cmd = NL80211_CMD_REQ_SET_REG,
4931 .doit = nl80211_req_set_reg,
4932 .policy = nl80211_policy,
4933 .flags = GENL_ADMIN_PERM,
4934 },
4935 {
4936 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4937 .doit = nl80211_get_mesh_params,
4938 .policy = nl80211_policy,
4939 /* can be retrieved by unprivileged users */
4940 },
4941 {
4942 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4943 .doit = nl80211_set_mesh_params,
4944 .policy = nl80211_policy,
4945 .flags = GENL_ADMIN_PERM,
4946 },
4947 {
4948 .cmd = NL80211_CMD_TRIGGER_SCAN,
4949 .doit = nl80211_trigger_scan,
4950 .policy = nl80211_policy,
4951 .flags = GENL_ADMIN_PERM,
4952 },
4953 {
4954 .cmd = NL80211_CMD_GET_SCAN,
4955 .policy = nl80211_policy,
4956 .dumpit = nl80211_dump_scan,
4957 },
4958 {
4959 .cmd = NL80211_CMD_AUTHENTICATE,
4960 .doit = nl80211_authenticate,
4961 .policy = nl80211_policy,
4962 .flags = GENL_ADMIN_PERM,
4963 },
4964 {
4965 .cmd = NL80211_CMD_ASSOCIATE,
4966 .doit = nl80211_associate,
4967 .policy = nl80211_policy,
4968 .flags = GENL_ADMIN_PERM,
4969 },
4970 {
4971 .cmd = NL80211_CMD_DEAUTHENTICATE,
4972 .doit = nl80211_deauthenticate,
4973 .policy = nl80211_policy,
4974 .flags = GENL_ADMIN_PERM,
4975 },
4976 {
4977 .cmd = NL80211_CMD_DISASSOCIATE,
4978 .doit = nl80211_disassociate,
4979 .policy = nl80211_policy,
4980 .flags = GENL_ADMIN_PERM,
4981 },
4982 {
4983 .cmd = NL80211_CMD_JOIN_IBSS,
4984 .doit = nl80211_join_ibss,
4985 .policy = nl80211_policy,
4986 .flags = GENL_ADMIN_PERM,
4987 },
4988 {
4989 .cmd = NL80211_CMD_LEAVE_IBSS,
4990 .doit = nl80211_leave_ibss,
4991 .policy = nl80211_policy,
4992 .flags = GENL_ADMIN_PERM,
4993 },
4994 #ifdef CONFIG_NL80211_TESTMODE
4995 {
4996 .cmd = NL80211_CMD_TESTMODE,
4997 .doit = nl80211_testmode_do,
4998 .policy = nl80211_policy,
4999 .flags = GENL_ADMIN_PERM,
5000 },
5001 #endif
5002 {
5003 .cmd = NL80211_CMD_CONNECT,
5004 .doit = nl80211_connect,
5005 .policy = nl80211_policy,
5006 .flags = GENL_ADMIN_PERM,
5007 },
5008 {
5009 .cmd = NL80211_CMD_DISCONNECT,
5010 .doit = nl80211_disconnect,
5011 .policy = nl80211_policy,
5012 .flags = GENL_ADMIN_PERM,
5013 },
5014 {
5015 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5016 .doit = nl80211_wiphy_netns,
5017 .policy = nl80211_policy,
5018 .flags = GENL_ADMIN_PERM,
5019 },
5020 {
5021 .cmd = NL80211_CMD_GET_SURVEY,
5022 .policy = nl80211_policy,
5023 .dumpit = nl80211_dump_survey,
5024 },
5025 {
5026 .cmd = NL80211_CMD_SET_PMKSA,
5027 .doit = nl80211_setdel_pmksa,
5028 .policy = nl80211_policy,
5029 .flags = GENL_ADMIN_PERM,
5030 },
5031 {
5032 .cmd = NL80211_CMD_DEL_PMKSA,
5033 .doit = nl80211_setdel_pmksa,
5034 .policy = nl80211_policy,
5035 .flags = GENL_ADMIN_PERM,
5036 },
5037 {
5038 .cmd = NL80211_CMD_FLUSH_PMKSA,
5039 .doit = nl80211_flush_pmksa,
5040 .policy = nl80211_policy,
5041 .flags = GENL_ADMIN_PERM,
5042 },
5043 {
5044 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5045 .doit = nl80211_remain_on_channel,
5046 .policy = nl80211_policy,
5047 .flags = GENL_ADMIN_PERM,
5048 },
5049 {
5050 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5051 .doit = nl80211_cancel_remain_on_channel,
5052 .policy = nl80211_policy,
5053 .flags = GENL_ADMIN_PERM,
5054 },
5055 {
5056 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5057 .doit = nl80211_set_tx_bitrate_mask,
5058 .policy = nl80211_policy,
5059 .flags = GENL_ADMIN_PERM,
5060 },
5061 {
5062 .cmd = NL80211_CMD_REGISTER_ACTION,
5063 .doit = nl80211_register_action,
5064 .policy = nl80211_policy,
5065 .flags = GENL_ADMIN_PERM,
5066 },
5067 {
5068 .cmd = NL80211_CMD_ACTION,
5069 .doit = nl80211_action,
5070 .policy = nl80211_policy,
5071 .flags = GENL_ADMIN_PERM,
5072 },
5073 {
5074 .cmd = NL80211_CMD_SET_POWER_SAVE,
5075 .doit = nl80211_set_power_save,
5076 .policy = nl80211_policy,
5077 .flags = GENL_ADMIN_PERM,
5078 },
5079 {
5080 .cmd = NL80211_CMD_GET_POWER_SAVE,
5081 .doit = nl80211_get_power_save,
5082 .policy = nl80211_policy,
5083 /* can be retrieved by unprivileged users */
5084 },
5085 };
5086
5087 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5088 .name = "mlme",
5089 };
5090
5091 /* multicast groups */
5092 static struct genl_multicast_group nl80211_config_mcgrp = {
5093 .name = "config",
5094 };
5095 static struct genl_multicast_group nl80211_scan_mcgrp = {
5096 .name = "scan",
5097 };
5098 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5099 .name = "regulatory",
5100 };
5101
5102 /* notification functions */
5103
5104 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5105 {
5106 struct sk_buff *msg;
5107
5108 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5109 if (!msg)
5110 return;
5111
5112 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5113 nlmsg_free(msg);
5114 return;
5115 }
5116
5117 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5118 nl80211_config_mcgrp.id, GFP_KERNEL);
5119 }
5120
5121 static int nl80211_add_scan_req(struct sk_buff *msg,
5122 struct cfg80211_registered_device *rdev)
5123 {
5124 struct cfg80211_scan_request *req = rdev->scan_req;
5125 struct nlattr *nest;
5126 int i;
5127
5128 ASSERT_RDEV_LOCK(rdev);
5129
5130 if (WARN_ON(!req))
5131 return 0;
5132
5133 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5134 if (!nest)
5135 goto nla_put_failure;
5136 for (i = 0; i < req->n_ssids; i++)
5137 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5138 nla_nest_end(msg, nest);
5139
5140 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5141 if (!nest)
5142 goto nla_put_failure;
5143 for (i = 0; i < req->n_channels; i++)
5144 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5145 nla_nest_end(msg, nest);
5146
5147 if (req->ie)
5148 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5149
5150 return 0;
5151 nla_put_failure:
5152 return -ENOBUFS;
5153 }
5154
5155 static int nl80211_send_scan_msg(struct sk_buff *msg,
5156 struct cfg80211_registered_device *rdev,
5157 struct net_device *netdev,
5158 u32 pid, u32 seq, int flags,
5159 u32 cmd)
5160 {
5161 void *hdr;
5162
5163 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5164 if (!hdr)
5165 return -1;
5166
5167 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5168 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5169
5170 /* ignore errors and send incomplete event anyway */
5171 nl80211_add_scan_req(msg, rdev);
5172
5173 return genlmsg_end(msg, hdr);
5174
5175 nla_put_failure:
5176 genlmsg_cancel(msg, hdr);
5177 return -EMSGSIZE;
5178 }
5179
5180 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5181 struct net_device *netdev)
5182 {
5183 struct sk_buff *msg;
5184
5185 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5186 if (!msg)
5187 return;
5188
5189 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5190 NL80211_CMD_TRIGGER_SCAN) < 0) {
5191 nlmsg_free(msg);
5192 return;
5193 }
5194
5195 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5196 nl80211_scan_mcgrp.id, GFP_KERNEL);
5197 }
5198
5199 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5200 struct net_device *netdev)
5201 {
5202 struct sk_buff *msg;
5203
5204 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5205 if (!msg)
5206 return;
5207
5208 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5209 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5210 nlmsg_free(msg);
5211 return;
5212 }
5213
5214 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5215 nl80211_scan_mcgrp.id, GFP_KERNEL);
5216 }
5217
5218 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5219 struct net_device *netdev)
5220 {
5221 struct sk_buff *msg;
5222
5223 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5224 if (!msg)
5225 return;
5226
5227 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5228 NL80211_CMD_SCAN_ABORTED) < 0) {
5229 nlmsg_free(msg);
5230 return;
5231 }
5232
5233 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5234 nl80211_scan_mcgrp.id, GFP_KERNEL);
5235 }
5236
5237 /*
5238 * This can happen on global regulatory changes or device specific settings
5239 * based on custom world regulatory domains.
5240 */
5241 void nl80211_send_reg_change_event(struct regulatory_request *request)
5242 {
5243 struct sk_buff *msg;
5244 void *hdr;
5245
5246 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5247 if (!msg)
5248 return;
5249
5250 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5251 if (!hdr) {
5252 nlmsg_free(msg);
5253 return;
5254 }
5255
5256 /* Userspace can always count this one always being set */
5257 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5258
5259 if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5260 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5261 NL80211_REGDOM_TYPE_WORLD);
5262 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5263 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5264 NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5265 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5266 request->intersect)
5267 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5268 NL80211_REGDOM_TYPE_INTERSECTION);
5269 else {
5270 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5271 NL80211_REGDOM_TYPE_COUNTRY);
5272 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5273 }
5274
5275 if (wiphy_idx_valid(request->wiphy_idx))
5276 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5277
5278 if (genlmsg_end(msg, hdr) < 0) {
5279 nlmsg_free(msg);
5280 return;
5281 }
5282
5283 rcu_read_lock();
5284 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5285 GFP_ATOMIC);
5286 rcu_read_unlock();
5287
5288 return;
5289
5290 nla_put_failure:
5291 genlmsg_cancel(msg, hdr);
5292 nlmsg_free(msg);
5293 }
5294
5295 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5296 struct net_device *netdev,
5297 const u8 *buf, size_t len,
5298 enum nl80211_commands cmd, gfp_t gfp)
5299 {
5300 struct sk_buff *msg;
5301 void *hdr;
5302
5303 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5304 if (!msg)
5305 return;
5306
5307 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5308 if (!hdr) {
5309 nlmsg_free(msg);
5310 return;
5311 }
5312
5313 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5314 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5315 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5316
5317 if (genlmsg_end(msg, hdr) < 0) {
5318 nlmsg_free(msg);
5319 return;
5320 }
5321
5322 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5323 nl80211_mlme_mcgrp.id, gfp);
5324 return;
5325
5326 nla_put_failure:
5327 genlmsg_cancel(msg, hdr);
5328 nlmsg_free(msg);
5329 }
5330
5331 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5332 struct net_device *netdev, const u8 *buf,
5333 size_t len, gfp_t gfp)
5334 {
5335 nl80211_send_mlme_event(rdev, netdev, buf, len,
5336 NL80211_CMD_AUTHENTICATE, gfp);
5337 }
5338
5339 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5340 struct net_device *netdev, const u8 *buf,
5341 size_t len, gfp_t gfp)
5342 {
5343 nl80211_send_mlme_event(rdev, netdev, buf, len,
5344 NL80211_CMD_ASSOCIATE, gfp);
5345 }
5346
5347 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5348 struct net_device *netdev, const u8 *buf,
5349 size_t len, gfp_t gfp)
5350 {
5351 nl80211_send_mlme_event(rdev, netdev, buf, len,
5352 NL80211_CMD_DEAUTHENTICATE, gfp);
5353 }
5354
5355 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5356 struct net_device *netdev, const u8 *buf,
5357 size_t len, gfp_t gfp)
5358 {
5359 nl80211_send_mlme_event(rdev, netdev, buf, len,
5360 NL80211_CMD_DISASSOCIATE, gfp);
5361 }
5362
5363 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5364 struct net_device *netdev, int cmd,
5365 const u8 *addr, gfp_t gfp)
5366 {
5367 struct sk_buff *msg;
5368 void *hdr;
5369
5370 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5371 if (!msg)
5372 return;
5373
5374 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5375 if (!hdr) {
5376 nlmsg_free(msg);
5377 return;
5378 }
5379
5380 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5381 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5382 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5383 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5384
5385 if (genlmsg_end(msg, hdr) < 0) {
5386 nlmsg_free(msg);
5387 return;
5388 }
5389
5390 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5391 nl80211_mlme_mcgrp.id, gfp);
5392 return;
5393
5394 nla_put_failure:
5395 genlmsg_cancel(msg, hdr);
5396 nlmsg_free(msg);
5397 }
5398
5399 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5400 struct net_device *netdev, const u8 *addr,
5401 gfp_t gfp)
5402 {
5403 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5404 addr, gfp);
5405 }
5406
5407 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5408 struct net_device *netdev, const u8 *addr,
5409 gfp_t gfp)
5410 {
5411 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5412 addr, gfp);
5413 }
5414
5415 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5416 struct net_device *netdev, const u8 *bssid,
5417 const u8 *req_ie, size_t req_ie_len,
5418 const u8 *resp_ie, size_t resp_ie_len,
5419 u16 status, gfp_t gfp)
5420 {
5421 struct sk_buff *msg;
5422 void *hdr;
5423
5424 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5425 if (!msg)
5426 return;
5427
5428 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5429 if (!hdr) {
5430 nlmsg_free(msg);
5431 return;
5432 }
5433
5434 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5435 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5436 if (bssid)
5437 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5438 NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5439 if (req_ie)
5440 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5441 if (resp_ie)
5442 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5443
5444 if (genlmsg_end(msg, hdr) < 0) {
5445 nlmsg_free(msg);
5446 return;
5447 }
5448
5449 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5450 nl80211_mlme_mcgrp.id, gfp);
5451 return;
5452
5453 nla_put_failure:
5454 genlmsg_cancel(msg, hdr);
5455 nlmsg_free(msg);
5456
5457 }
5458
5459 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5460 struct net_device *netdev, const u8 *bssid,
5461 const u8 *req_ie, size_t req_ie_len,
5462 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5463 {
5464 struct sk_buff *msg;
5465 void *hdr;
5466
5467 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5468 if (!msg)
5469 return;
5470
5471 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5472 if (!hdr) {
5473 nlmsg_free(msg);
5474 return;
5475 }
5476
5477 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5478 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5479 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5480 if (req_ie)
5481 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5482 if (resp_ie)
5483 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5484
5485 if (genlmsg_end(msg, hdr) < 0) {
5486 nlmsg_free(msg);
5487 return;
5488 }
5489
5490 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5491 nl80211_mlme_mcgrp.id, gfp);
5492 return;
5493
5494 nla_put_failure:
5495 genlmsg_cancel(msg, hdr);
5496 nlmsg_free(msg);
5497
5498 }
5499
5500 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5501 struct net_device *netdev, u16 reason,
5502 const u8 *ie, size_t ie_len, bool from_ap)
5503 {
5504 struct sk_buff *msg;
5505 void *hdr;
5506
5507 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5508 if (!msg)
5509 return;
5510
5511 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5512 if (!hdr) {
5513 nlmsg_free(msg);
5514 return;
5515 }
5516
5517 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5518 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5519 if (from_ap && reason)
5520 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5521 if (from_ap)
5522 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5523 if (ie)
5524 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5525
5526 if (genlmsg_end(msg, hdr) < 0) {
5527 nlmsg_free(msg);
5528 return;
5529 }
5530
5531 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5532 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5533 return;
5534
5535 nla_put_failure:
5536 genlmsg_cancel(msg, hdr);
5537 nlmsg_free(msg);
5538
5539 }
5540
5541 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5542 struct net_device *netdev, const u8 *bssid,
5543 gfp_t gfp)
5544 {
5545 struct sk_buff *msg;
5546 void *hdr;
5547
5548 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5549 if (!msg)
5550 return;
5551
5552 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5553 if (!hdr) {
5554 nlmsg_free(msg);
5555 return;
5556 }
5557
5558 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5559 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5560 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5561
5562 if (genlmsg_end(msg, hdr) < 0) {
5563 nlmsg_free(msg);
5564 return;
5565 }
5566
5567 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5568 nl80211_mlme_mcgrp.id, gfp);
5569 return;
5570
5571 nla_put_failure:
5572 genlmsg_cancel(msg, hdr);
5573 nlmsg_free(msg);
5574 }
5575
5576 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5577 struct net_device *netdev, const u8 *addr,
5578 enum nl80211_key_type key_type, int key_id,
5579 const u8 *tsc, gfp_t gfp)
5580 {
5581 struct sk_buff *msg;
5582 void *hdr;
5583
5584 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5585 if (!msg)
5586 return;
5587
5588 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5589 if (!hdr) {
5590 nlmsg_free(msg);
5591 return;
5592 }
5593
5594 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5595 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5596 if (addr)
5597 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5598 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5599 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5600 if (tsc)
5601 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5602
5603 if (genlmsg_end(msg, hdr) < 0) {
5604 nlmsg_free(msg);
5605 return;
5606 }
5607
5608 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5609 nl80211_mlme_mcgrp.id, gfp);
5610 return;
5611
5612 nla_put_failure:
5613 genlmsg_cancel(msg, hdr);
5614 nlmsg_free(msg);
5615 }
5616
5617 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5618 struct ieee80211_channel *channel_before,
5619 struct ieee80211_channel *channel_after)
5620 {
5621 struct sk_buff *msg;
5622 void *hdr;
5623 struct nlattr *nl_freq;
5624
5625 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5626 if (!msg)
5627 return;
5628
5629 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5630 if (!hdr) {
5631 nlmsg_free(msg);
5632 return;
5633 }
5634
5635 /*
5636 * Since we are applying the beacon hint to a wiphy we know its
5637 * wiphy_idx is valid
5638 */
5639 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5640
5641 /* Before */
5642 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5643 if (!nl_freq)
5644 goto nla_put_failure;
5645 if (nl80211_msg_put_channel(msg, channel_before))
5646 goto nla_put_failure;
5647 nla_nest_end(msg, nl_freq);
5648
5649 /* After */
5650 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5651 if (!nl_freq)
5652 goto nla_put_failure;
5653 if (nl80211_msg_put_channel(msg, channel_after))
5654 goto nla_put_failure;
5655 nla_nest_end(msg, nl_freq);
5656
5657 if (genlmsg_end(msg, hdr) < 0) {
5658 nlmsg_free(msg);
5659 return;
5660 }
5661
5662 rcu_read_lock();
5663 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5664 GFP_ATOMIC);
5665 rcu_read_unlock();
5666
5667 return;
5668
5669 nla_put_failure:
5670 genlmsg_cancel(msg, hdr);
5671 nlmsg_free(msg);
5672 }
5673
5674 static void nl80211_send_remain_on_chan_event(
5675 int cmd, struct cfg80211_registered_device *rdev,
5676 struct net_device *netdev, u64 cookie,
5677 struct ieee80211_channel *chan,
5678 enum nl80211_channel_type channel_type,
5679 unsigned int duration, gfp_t gfp)
5680 {
5681 struct sk_buff *msg;
5682 void *hdr;
5683
5684 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5685 if (!msg)
5686 return;
5687
5688 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5689 if (!hdr) {
5690 nlmsg_free(msg);
5691 return;
5692 }
5693
5694 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5695 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5696 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5697 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5698 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5699
5700 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5701 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5702
5703 if (genlmsg_end(msg, hdr) < 0) {
5704 nlmsg_free(msg);
5705 return;
5706 }
5707
5708 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5709 nl80211_mlme_mcgrp.id, gfp);
5710 return;
5711
5712 nla_put_failure:
5713 genlmsg_cancel(msg, hdr);
5714 nlmsg_free(msg);
5715 }
5716
5717 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5718 struct net_device *netdev, u64 cookie,
5719 struct ieee80211_channel *chan,
5720 enum nl80211_channel_type channel_type,
5721 unsigned int duration, gfp_t gfp)
5722 {
5723 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5724 rdev, netdev, cookie, chan,
5725 channel_type, duration, gfp);
5726 }
5727
5728 void nl80211_send_remain_on_channel_cancel(
5729 struct cfg80211_registered_device *rdev, struct net_device *netdev,
5730 u64 cookie, struct ieee80211_channel *chan,
5731 enum nl80211_channel_type channel_type, gfp_t gfp)
5732 {
5733 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5734 rdev, netdev, cookie, chan,
5735 channel_type, 0, gfp);
5736 }
5737
5738 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5739 struct net_device *dev, const u8 *mac_addr,
5740 struct station_info *sinfo, gfp_t gfp)
5741 {
5742 struct sk_buff *msg;
5743
5744 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5745 if (!msg)
5746 return;
5747
5748 if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5749 nlmsg_free(msg);
5750 return;
5751 }
5752
5753 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5754 nl80211_mlme_mcgrp.id, gfp);
5755 }
5756
5757 int nl80211_send_action(struct cfg80211_registered_device *rdev,
5758 struct net_device *netdev, u32 nlpid,
5759 int freq, const u8 *buf, size_t len, gfp_t gfp)
5760 {
5761 struct sk_buff *msg;
5762 void *hdr;
5763 int err;
5764
5765 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5766 if (!msg)
5767 return -ENOMEM;
5768
5769 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION);
5770 if (!hdr) {
5771 nlmsg_free(msg);
5772 return -ENOMEM;
5773 }
5774
5775 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5776 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5777 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5778 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5779
5780 err = genlmsg_end(msg, hdr);
5781 if (err < 0) {
5782 nlmsg_free(msg);
5783 return err;
5784 }
5785
5786 err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5787 if (err < 0)
5788 return err;
5789 return 0;
5790
5791 nla_put_failure:
5792 genlmsg_cancel(msg, hdr);
5793 nlmsg_free(msg);
5794 return -ENOBUFS;
5795 }
5796
5797 void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev,
5798 struct net_device *netdev, u64 cookie,
5799 const u8 *buf, size_t len, bool ack,
5800 gfp_t gfp)
5801 {
5802 struct sk_buff *msg;
5803 void *hdr;
5804
5805 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5806 if (!msg)
5807 return;
5808
5809 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION_TX_STATUS);
5810 if (!hdr) {
5811 nlmsg_free(msg);
5812 return;
5813 }
5814
5815 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5816 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5817 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5818 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5819 if (ack)
5820 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
5821
5822 if (genlmsg_end(msg, hdr) < 0) {
5823 nlmsg_free(msg);
5824 return;
5825 }
5826
5827 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
5828 return;
5829
5830 nla_put_failure:
5831 genlmsg_cancel(msg, hdr);
5832 nlmsg_free(msg);
5833 }
5834
5835 static int nl80211_netlink_notify(struct notifier_block * nb,
5836 unsigned long state,
5837 void *_notify)
5838 {
5839 struct netlink_notify *notify = _notify;
5840 struct cfg80211_registered_device *rdev;
5841 struct wireless_dev *wdev;
5842
5843 if (state != NETLINK_URELEASE)
5844 return NOTIFY_DONE;
5845
5846 rcu_read_lock();
5847
5848 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
5849 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
5850 cfg80211_mlme_unregister_actions(wdev, notify->pid);
5851
5852 rcu_read_unlock();
5853
5854 return NOTIFY_DONE;
5855 }
5856
5857 static struct notifier_block nl80211_netlink_notifier = {
5858 .notifier_call = nl80211_netlink_notify,
5859 };
5860
5861 /* initialisation/exit functions */
5862
5863 int nl80211_init(void)
5864 {
5865 int err;
5866
5867 err = genl_register_family_with_ops(&nl80211_fam,
5868 nl80211_ops, ARRAY_SIZE(nl80211_ops));
5869 if (err)
5870 return err;
5871
5872 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
5873 if (err)
5874 goto err_out;
5875
5876 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
5877 if (err)
5878 goto err_out;
5879
5880 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
5881 if (err)
5882 goto err_out;
5883
5884 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
5885 if (err)
5886 goto err_out;
5887
5888 #ifdef CONFIG_NL80211_TESTMODE
5889 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
5890 if (err)
5891 goto err_out;
5892 #endif
5893
5894 err = netlink_register_notifier(&nl80211_netlink_notifier);
5895 if (err)
5896 goto err_out;
5897
5898 return 0;
5899 err_out:
5900 genl_unregister_family(&nl80211_fam);
5901 return err;
5902 }
5903
5904 void nl80211_exit(void)
5905 {
5906 netlink_unregister_notifier(&nl80211_netlink_notifier);
5907 genl_unregister_family(&nl80211_fam);
5908 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree