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Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
[GitHub/LineageOS/android_kernel_samsung_universal7580.git] / net / wireless / nl80211.c
1 /*
2 * This is the new netlink-based wireless configuration interface.
3 *
4 * Copyright 2006-2009 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/genetlink.h>
18 #include <net/cfg80211.h>
19 #include "core.h"
20 #include "nl80211.h"
21 #include "reg.h"
22
23 /* the netlink family */
24 static struct genl_family nl80211_fam = {
25 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
26 .name = "nl80211", /* have users key off the name instead */
27 .hdrsize = 0, /* no private header */
28 .version = 1, /* no particular meaning now */
29 .maxattr = NL80211_ATTR_MAX,
30 };
31
32 /* internal helper: get drv and dev */
33 static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
34 struct cfg80211_registered_device **drv,
35 struct net_device **dev)
36 {
37 int ifindex;
38
39 if (!attrs[NL80211_ATTR_IFINDEX])
40 return -EINVAL;
41
42 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
43 *dev = dev_get_by_index(&init_net, ifindex);
44 if (!*dev)
45 return -ENODEV;
46
47 *drv = cfg80211_get_dev_from_ifindex(ifindex);
48 if (IS_ERR(*drv)) {
49 dev_put(*dev);
50 return PTR_ERR(*drv);
51 }
52
53 return 0;
54 }
55
56 /* policy for the attributes */
57 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
58 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
59 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
60 .len = 20-1 },
61 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
62 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
63 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
64 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
65 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
66 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
67 [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
68
69 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
70 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
71 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
72
73 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
74
75 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
76 .len = WLAN_MAX_KEY_LEN },
77 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
78 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
79 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
80 [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
81
82 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
83 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
84 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
85 .len = IEEE80211_MAX_DATA_LEN },
86 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
87 .len = IEEE80211_MAX_DATA_LEN },
88 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
89 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
90 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
91 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
92 .len = NL80211_MAX_SUPP_RATES },
93 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
94 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
95 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
96 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
97 .len = IEEE80211_MAX_MESH_ID_LEN },
98 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
99
100 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
101 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
102
103 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
104 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
105 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
106 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
107 .len = NL80211_MAX_SUPP_RATES },
108
109 [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
110
111 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
112 .len = NL80211_HT_CAPABILITY_LEN },
113
114 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
115 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
116 .len = IEEE80211_MAX_DATA_LEN },
117 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
118 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
119
120 [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
121 .len = IEEE80211_MAX_SSID_LEN },
122 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
123 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
124 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
125 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
126 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
127 [NL80211_ATTR_STA_FLAGS2] = {
128 .len = sizeof(struct nl80211_sta_flag_update),
129 },
130 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
131 };
132
133 /* IE validation */
134 static bool is_valid_ie_attr(const struct nlattr *attr)
135 {
136 const u8 *pos;
137 int len;
138
139 if (!attr)
140 return true;
141
142 pos = nla_data(attr);
143 len = nla_len(attr);
144
145 while (len) {
146 u8 elemlen;
147
148 if (len < 2)
149 return false;
150 len -= 2;
151
152 elemlen = pos[1];
153 if (elemlen > len)
154 return false;
155
156 len -= elemlen;
157 pos += 2 + elemlen;
158 }
159
160 return true;
161 }
162
163 /* message building helper */
164 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
165 int flags, u8 cmd)
166 {
167 /* since there is no private header just add the generic one */
168 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
169 }
170
171 static int nl80211_msg_put_channel(struct sk_buff *msg,
172 struct ieee80211_channel *chan)
173 {
174 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
175 chan->center_freq);
176
177 if (chan->flags & IEEE80211_CHAN_DISABLED)
178 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
179 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
180 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
181 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
182 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
183 if (chan->flags & IEEE80211_CHAN_RADAR)
184 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
185
186 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
187 DBM_TO_MBM(chan->max_power));
188
189 return 0;
190
191 nla_put_failure:
192 return -ENOBUFS;
193 }
194
195 /* netlink command implementations */
196
197 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
198 struct cfg80211_registered_device *dev)
199 {
200 void *hdr;
201 struct nlattr *nl_bands, *nl_band;
202 struct nlattr *nl_freqs, *nl_freq;
203 struct nlattr *nl_rates, *nl_rate;
204 struct nlattr *nl_modes;
205 struct nlattr *nl_cmds;
206 enum ieee80211_band band;
207 struct ieee80211_channel *chan;
208 struct ieee80211_rate *rate;
209 int i;
210 u16 ifmodes = dev->wiphy.interface_modes;
211
212 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
213 if (!hdr)
214 return -1;
215
216 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
217 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
218
219 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
220 dev->wiphy.retry_short);
221 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
222 dev->wiphy.retry_long);
223 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
224 dev->wiphy.frag_threshold);
225 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
226 dev->wiphy.rts_threshold);
227
228 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
229 dev->wiphy.max_scan_ssids);
230 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
231 dev->wiphy.max_scan_ie_len);
232
233 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
234 sizeof(u32) * dev->wiphy.n_cipher_suites,
235 dev->wiphy.cipher_suites);
236
237 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
238 if (!nl_modes)
239 goto nla_put_failure;
240
241 i = 0;
242 while (ifmodes) {
243 if (ifmodes & 1)
244 NLA_PUT_FLAG(msg, i);
245 ifmodes >>= 1;
246 i++;
247 }
248
249 nla_nest_end(msg, nl_modes);
250
251 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
252 if (!nl_bands)
253 goto nla_put_failure;
254
255 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
256 if (!dev->wiphy.bands[band])
257 continue;
258
259 nl_band = nla_nest_start(msg, band);
260 if (!nl_band)
261 goto nla_put_failure;
262
263 /* add HT info */
264 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
265 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
266 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
267 &dev->wiphy.bands[band]->ht_cap.mcs);
268 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
269 dev->wiphy.bands[band]->ht_cap.cap);
270 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
271 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
272 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
273 dev->wiphy.bands[band]->ht_cap.ampdu_density);
274 }
275
276 /* add frequencies */
277 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
278 if (!nl_freqs)
279 goto nla_put_failure;
280
281 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
282 nl_freq = nla_nest_start(msg, i);
283 if (!nl_freq)
284 goto nla_put_failure;
285
286 chan = &dev->wiphy.bands[band]->channels[i];
287
288 if (nl80211_msg_put_channel(msg, chan))
289 goto nla_put_failure;
290
291 nla_nest_end(msg, nl_freq);
292 }
293
294 nla_nest_end(msg, nl_freqs);
295
296 /* add bitrates */
297 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
298 if (!nl_rates)
299 goto nla_put_failure;
300
301 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
302 nl_rate = nla_nest_start(msg, i);
303 if (!nl_rate)
304 goto nla_put_failure;
305
306 rate = &dev->wiphy.bands[band]->bitrates[i];
307 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
308 rate->bitrate);
309 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
310 NLA_PUT_FLAG(msg,
311 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
312
313 nla_nest_end(msg, nl_rate);
314 }
315
316 nla_nest_end(msg, nl_rates);
317
318 nla_nest_end(msg, nl_band);
319 }
320 nla_nest_end(msg, nl_bands);
321
322 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
323 if (!nl_cmds)
324 goto nla_put_failure;
325
326 i = 0;
327 #define CMD(op, n) \
328 do { \
329 if (dev->ops->op) { \
330 i++; \
331 NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
332 } \
333 } while (0)
334
335 CMD(add_virtual_intf, NEW_INTERFACE);
336 CMD(change_virtual_intf, SET_INTERFACE);
337 CMD(add_key, NEW_KEY);
338 CMD(add_beacon, NEW_BEACON);
339 CMD(add_station, NEW_STATION);
340 CMD(add_mpath, NEW_MPATH);
341 CMD(set_mesh_params, SET_MESH_PARAMS);
342 CMD(change_bss, SET_BSS);
343 CMD(auth, AUTHENTICATE);
344 CMD(assoc, ASSOCIATE);
345 CMD(deauth, DEAUTHENTICATE);
346 CMD(disassoc, DISASSOCIATE);
347 CMD(join_ibss, JOIN_IBSS);
348
349 #undef CMD
350 nla_nest_end(msg, nl_cmds);
351
352 return genlmsg_end(msg, hdr);
353
354 nla_put_failure:
355 genlmsg_cancel(msg, hdr);
356 return -EMSGSIZE;
357 }
358
359 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
360 {
361 int idx = 0;
362 int start = cb->args[0];
363 struct cfg80211_registered_device *dev;
364
365 mutex_lock(&cfg80211_mutex);
366 list_for_each_entry(dev, &cfg80211_drv_list, list) {
367 if (++idx <= start)
368 continue;
369 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
370 cb->nlh->nlmsg_seq, NLM_F_MULTI,
371 dev) < 0) {
372 idx--;
373 break;
374 }
375 }
376 mutex_unlock(&cfg80211_mutex);
377
378 cb->args[0] = idx;
379
380 return skb->len;
381 }
382
383 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
384 {
385 struct sk_buff *msg;
386 struct cfg80211_registered_device *dev;
387
388 dev = cfg80211_get_dev_from_info(info);
389 if (IS_ERR(dev))
390 return PTR_ERR(dev);
391
392 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
393 if (!msg)
394 goto out_err;
395
396 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
397 goto out_free;
398
399 cfg80211_put_dev(dev);
400
401 return genlmsg_unicast(msg, info->snd_pid);
402
403 out_free:
404 nlmsg_free(msg);
405 out_err:
406 cfg80211_put_dev(dev);
407 return -ENOBUFS;
408 }
409
410 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
411 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
412 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
413 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
414 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
415 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
416 };
417
418 static int parse_txq_params(struct nlattr *tb[],
419 struct ieee80211_txq_params *txq_params)
420 {
421 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
422 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
423 !tb[NL80211_TXQ_ATTR_AIFS])
424 return -EINVAL;
425
426 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
427 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
428 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
429 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
430 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
431
432 return 0;
433 }
434
435 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
436 {
437 struct cfg80211_registered_device *rdev;
438 int result = 0, rem_txq_params = 0;
439 struct nlattr *nl_txq_params;
440 u32 changed;
441 u8 retry_short = 0, retry_long = 0;
442 u32 frag_threshold = 0, rts_threshold = 0;
443
444 rtnl_lock();
445
446 mutex_lock(&cfg80211_mutex);
447
448 rdev = __cfg80211_drv_from_info(info);
449 if (IS_ERR(rdev)) {
450 result = PTR_ERR(rdev);
451 goto unlock;
452 }
453
454 mutex_lock(&rdev->mtx);
455
456 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
457 result = cfg80211_dev_rename(
458 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
459
460 mutex_unlock(&cfg80211_mutex);
461
462 if (result)
463 goto bad_res;
464
465 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
466 struct ieee80211_txq_params txq_params;
467 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
468
469 if (!rdev->ops->set_txq_params) {
470 result = -EOPNOTSUPP;
471 goto bad_res;
472 }
473
474 nla_for_each_nested(nl_txq_params,
475 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
476 rem_txq_params) {
477 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
478 nla_data(nl_txq_params),
479 nla_len(nl_txq_params),
480 txq_params_policy);
481 result = parse_txq_params(tb, &txq_params);
482 if (result)
483 goto bad_res;
484
485 result = rdev->ops->set_txq_params(&rdev->wiphy,
486 &txq_params);
487 if (result)
488 goto bad_res;
489 }
490 }
491
492 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
493 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
494 struct ieee80211_channel *chan;
495 struct ieee80211_sta_ht_cap *ht_cap;
496 u32 freq;
497
498 if (!rdev->ops->set_channel) {
499 result = -EOPNOTSUPP;
500 goto bad_res;
501 }
502
503 result = -EINVAL;
504
505 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
506 channel_type = nla_get_u32(info->attrs[
507 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
508 if (channel_type != NL80211_CHAN_NO_HT &&
509 channel_type != NL80211_CHAN_HT20 &&
510 channel_type != NL80211_CHAN_HT40PLUS &&
511 channel_type != NL80211_CHAN_HT40MINUS)
512 goto bad_res;
513 }
514
515 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
516 chan = ieee80211_get_channel(&rdev->wiphy, freq);
517
518 /* Primary channel not allowed */
519 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
520 goto bad_res;
521
522 if (channel_type == NL80211_CHAN_HT40MINUS &&
523 (chan->flags & IEEE80211_CHAN_NO_HT40MINUS))
524 goto bad_res;
525 else if (channel_type == NL80211_CHAN_HT40PLUS &&
526 (chan->flags & IEEE80211_CHAN_NO_HT40PLUS))
527 goto bad_res;
528
529 /*
530 * At this point we know if that if HT40 was requested
531 * we are allowed to use it and the extension channel
532 * exists.
533 */
534
535 ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
536
537 /* no HT capabilities or intolerant */
538 if (channel_type != NL80211_CHAN_NO_HT) {
539 if (!ht_cap->ht_supported)
540 goto bad_res;
541 if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
542 (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
543 goto bad_res;
544 }
545
546 result = rdev->ops->set_channel(&rdev->wiphy, chan,
547 channel_type);
548 if (result)
549 goto bad_res;
550 }
551
552 changed = 0;
553
554 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
555 retry_short = nla_get_u8(
556 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
557 if (retry_short == 0) {
558 result = -EINVAL;
559 goto bad_res;
560 }
561 changed |= WIPHY_PARAM_RETRY_SHORT;
562 }
563
564 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
565 retry_long = nla_get_u8(
566 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
567 if (retry_long == 0) {
568 result = -EINVAL;
569 goto bad_res;
570 }
571 changed |= WIPHY_PARAM_RETRY_LONG;
572 }
573
574 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
575 frag_threshold = nla_get_u32(
576 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
577 if (frag_threshold < 256) {
578 result = -EINVAL;
579 goto bad_res;
580 }
581 if (frag_threshold != (u32) -1) {
582 /*
583 * Fragments (apart from the last one) are required to
584 * have even length. Make the fragmentation code
585 * simpler by stripping LSB should someone try to use
586 * odd threshold value.
587 */
588 frag_threshold &= ~0x1;
589 }
590 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
591 }
592
593 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
594 rts_threshold = nla_get_u32(
595 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
596 changed |= WIPHY_PARAM_RTS_THRESHOLD;
597 }
598
599 if (changed) {
600 u8 old_retry_short, old_retry_long;
601 u32 old_frag_threshold, old_rts_threshold;
602
603 if (!rdev->ops->set_wiphy_params) {
604 result = -EOPNOTSUPP;
605 goto bad_res;
606 }
607
608 old_retry_short = rdev->wiphy.retry_short;
609 old_retry_long = rdev->wiphy.retry_long;
610 old_frag_threshold = rdev->wiphy.frag_threshold;
611 old_rts_threshold = rdev->wiphy.rts_threshold;
612
613 if (changed & WIPHY_PARAM_RETRY_SHORT)
614 rdev->wiphy.retry_short = retry_short;
615 if (changed & WIPHY_PARAM_RETRY_LONG)
616 rdev->wiphy.retry_long = retry_long;
617 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
618 rdev->wiphy.frag_threshold = frag_threshold;
619 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
620 rdev->wiphy.rts_threshold = rts_threshold;
621
622 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
623 if (result) {
624 rdev->wiphy.retry_short = old_retry_short;
625 rdev->wiphy.retry_long = old_retry_long;
626 rdev->wiphy.frag_threshold = old_frag_threshold;
627 rdev->wiphy.rts_threshold = old_rts_threshold;
628 }
629 }
630
631 bad_res:
632 mutex_unlock(&rdev->mtx);
633 unlock:
634 rtnl_unlock();
635 return result;
636 }
637
638
639 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
640 struct cfg80211_registered_device *rdev,
641 struct net_device *dev)
642 {
643 void *hdr;
644
645 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
646 if (!hdr)
647 return -1;
648
649 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
650 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
651 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
652 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
653 return genlmsg_end(msg, hdr);
654
655 nla_put_failure:
656 genlmsg_cancel(msg, hdr);
657 return -EMSGSIZE;
658 }
659
660 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
661 {
662 int wp_idx = 0;
663 int if_idx = 0;
664 int wp_start = cb->args[0];
665 int if_start = cb->args[1];
666 struct cfg80211_registered_device *dev;
667 struct wireless_dev *wdev;
668
669 mutex_lock(&cfg80211_mutex);
670 list_for_each_entry(dev, &cfg80211_drv_list, list) {
671 if (wp_idx < wp_start) {
672 wp_idx++;
673 continue;
674 }
675 if_idx = 0;
676
677 mutex_lock(&dev->devlist_mtx);
678 list_for_each_entry(wdev, &dev->netdev_list, list) {
679 if (if_idx < if_start) {
680 if_idx++;
681 continue;
682 }
683 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
684 cb->nlh->nlmsg_seq, NLM_F_MULTI,
685 dev, wdev->netdev) < 0) {
686 mutex_unlock(&dev->devlist_mtx);
687 goto out;
688 }
689 if_idx++;
690 }
691 mutex_unlock(&dev->devlist_mtx);
692
693 wp_idx++;
694 }
695 out:
696 mutex_unlock(&cfg80211_mutex);
697
698 cb->args[0] = wp_idx;
699 cb->args[1] = if_idx;
700
701 return skb->len;
702 }
703
704 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
705 {
706 struct sk_buff *msg;
707 struct cfg80211_registered_device *dev;
708 struct net_device *netdev;
709 int err;
710
711 err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
712 if (err)
713 return err;
714
715 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
716 if (!msg)
717 goto out_err;
718
719 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
720 dev, netdev) < 0)
721 goto out_free;
722
723 dev_put(netdev);
724 cfg80211_put_dev(dev);
725
726 return genlmsg_unicast(msg, info->snd_pid);
727
728 out_free:
729 nlmsg_free(msg);
730 out_err:
731 dev_put(netdev);
732 cfg80211_put_dev(dev);
733 return -ENOBUFS;
734 }
735
736 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
737 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
738 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
739 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
740 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
741 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
742 };
743
744 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
745 {
746 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
747 int flag;
748
749 *mntrflags = 0;
750
751 if (!nla)
752 return -EINVAL;
753
754 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
755 nla, mntr_flags_policy))
756 return -EINVAL;
757
758 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
759 if (flags[flag])
760 *mntrflags |= (1<<flag);
761
762 return 0;
763 }
764
765 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
766 {
767 struct cfg80211_registered_device *drv;
768 struct vif_params params;
769 int err, ifindex;
770 enum nl80211_iftype otype, ntype;
771 struct net_device *dev;
772 u32 _flags, *flags = NULL;
773 bool change = false;
774
775 memset(&params, 0, sizeof(params));
776
777 rtnl_lock();
778
779 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
780 if (err)
781 goto unlock_rtnl;
782
783 ifindex = dev->ifindex;
784 otype = ntype = dev->ieee80211_ptr->iftype;
785 dev_put(dev);
786
787 if (info->attrs[NL80211_ATTR_IFTYPE]) {
788 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
789 if (otype != ntype)
790 change = true;
791 if (ntype > NL80211_IFTYPE_MAX) {
792 err = -EINVAL;
793 goto unlock;
794 }
795 }
796
797 if (!drv->ops->change_virtual_intf ||
798 !(drv->wiphy.interface_modes & (1 << ntype))) {
799 err = -EOPNOTSUPP;
800 goto unlock;
801 }
802
803 if (info->attrs[NL80211_ATTR_MESH_ID]) {
804 if (ntype != NL80211_IFTYPE_MESH_POINT) {
805 err = -EINVAL;
806 goto unlock;
807 }
808 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
809 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
810 change = true;
811 }
812
813 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
814 if (ntype != NL80211_IFTYPE_MONITOR) {
815 err = -EINVAL;
816 goto unlock;
817 }
818 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
819 &_flags);
820 if (err)
821 goto unlock;
822
823 flags = &_flags;
824 change = true;
825 }
826
827 if (change)
828 err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
829 ntype, flags, &params);
830 else
831 err = 0;
832
833 dev = __dev_get_by_index(&init_net, ifindex);
834 WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != ntype));
835
836 if (dev && !err && (ntype != otype)) {
837 if (otype == NL80211_IFTYPE_ADHOC)
838 cfg80211_clear_ibss(dev, false);
839 }
840
841 unlock:
842 cfg80211_put_dev(drv);
843 unlock_rtnl:
844 rtnl_unlock();
845 return err;
846 }
847
848 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
849 {
850 struct cfg80211_registered_device *drv;
851 struct vif_params params;
852 int err;
853 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
854 u32 flags;
855
856 memset(&params, 0, sizeof(params));
857
858 if (!info->attrs[NL80211_ATTR_IFNAME])
859 return -EINVAL;
860
861 if (info->attrs[NL80211_ATTR_IFTYPE]) {
862 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
863 if (type > NL80211_IFTYPE_MAX)
864 return -EINVAL;
865 }
866
867 rtnl_lock();
868
869 drv = cfg80211_get_dev_from_info(info);
870 if (IS_ERR(drv)) {
871 err = PTR_ERR(drv);
872 goto unlock_rtnl;
873 }
874
875 if (!drv->ops->add_virtual_intf ||
876 !(drv->wiphy.interface_modes & (1 << type))) {
877 err = -EOPNOTSUPP;
878 goto unlock;
879 }
880
881 if (type == NL80211_IFTYPE_MESH_POINT &&
882 info->attrs[NL80211_ATTR_MESH_ID]) {
883 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
884 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
885 }
886
887 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
888 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
889 &flags);
890 err = drv->ops->add_virtual_intf(&drv->wiphy,
891 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
892 type, err ? NULL : &flags, &params);
893
894 unlock:
895 cfg80211_put_dev(drv);
896 unlock_rtnl:
897 rtnl_unlock();
898 return err;
899 }
900
901 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
902 {
903 struct cfg80211_registered_device *drv;
904 int ifindex, err;
905 struct net_device *dev;
906
907 rtnl_lock();
908
909 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
910 if (err)
911 goto unlock_rtnl;
912 ifindex = dev->ifindex;
913 dev_put(dev);
914
915 if (!drv->ops->del_virtual_intf) {
916 err = -EOPNOTSUPP;
917 goto out;
918 }
919
920 err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
921
922 out:
923 cfg80211_put_dev(drv);
924 unlock_rtnl:
925 rtnl_unlock();
926 return err;
927 }
928
929 struct get_key_cookie {
930 struct sk_buff *msg;
931 int error;
932 };
933
934 static void get_key_callback(void *c, struct key_params *params)
935 {
936 struct get_key_cookie *cookie = c;
937
938 if (params->key)
939 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
940 params->key_len, params->key);
941
942 if (params->seq)
943 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
944 params->seq_len, params->seq);
945
946 if (params->cipher)
947 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
948 params->cipher);
949
950 return;
951 nla_put_failure:
952 cookie->error = 1;
953 }
954
955 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
956 {
957 struct cfg80211_registered_device *drv;
958 int err;
959 struct net_device *dev;
960 u8 key_idx = 0;
961 u8 *mac_addr = NULL;
962 struct get_key_cookie cookie = {
963 .error = 0,
964 };
965 void *hdr;
966 struct sk_buff *msg;
967
968 if (info->attrs[NL80211_ATTR_KEY_IDX])
969 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
970
971 if (key_idx > 5)
972 return -EINVAL;
973
974 if (info->attrs[NL80211_ATTR_MAC])
975 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
976
977 rtnl_lock();
978
979 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
980 if (err)
981 goto unlock_rtnl;
982
983 if (!drv->ops->get_key) {
984 err = -EOPNOTSUPP;
985 goto out;
986 }
987
988 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
989 if (!msg) {
990 err = -ENOMEM;
991 goto out;
992 }
993
994 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
995 NL80211_CMD_NEW_KEY);
996
997 if (IS_ERR(hdr)) {
998 err = PTR_ERR(hdr);
999 goto out;
1000 }
1001
1002 cookie.msg = msg;
1003
1004 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1005 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1006 if (mac_addr)
1007 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1008
1009 err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
1010 &cookie, get_key_callback);
1011
1012 if (err)
1013 goto out;
1014
1015 if (cookie.error)
1016 goto nla_put_failure;
1017
1018 genlmsg_end(msg, hdr);
1019 err = genlmsg_unicast(msg, info->snd_pid);
1020 goto out;
1021
1022 nla_put_failure:
1023 err = -ENOBUFS;
1024 nlmsg_free(msg);
1025 out:
1026 cfg80211_put_dev(drv);
1027 dev_put(dev);
1028 unlock_rtnl:
1029 rtnl_unlock();
1030
1031 return err;
1032 }
1033
1034 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1035 {
1036 struct cfg80211_registered_device *drv;
1037 int err;
1038 struct net_device *dev;
1039 u8 key_idx;
1040 int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1041 u8 key_index);
1042
1043 if (!info->attrs[NL80211_ATTR_KEY_IDX])
1044 return -EINVAL;
1045
1046 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1047
1048 if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) {
1049 if (key_idx < 4 || key_idx > 5)
1050 return -EINVAL;
1051 } else if (key_idx > 3)
1052 return -EINVAL;
1053
1054 /* currently only support setting default key */
1055 if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] &&
1056 !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT])
1057 return -EINVAL;
1058
1059 rtnl_lock();
1060
1061 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1062 if (err)
1063 goto unlock_rtnl;
1064
1065 if (info->attrs[NL80211_ATTR_KEY_DEFAULT])
1066 func = drv->ops->set_default_key;
1067 else
1068 func = drv->ops->set_default_mgmt_key;
1069
1070 if (!func) {
1071 err = -EOPNOTSUPP;
1072 goto out;
1073 }
1074
1075 err = func(&drv->wiphy, dev, key_idx);
1076 #ifdef CONFIG_WIRELESS_EXT
1077 if (!err) {
1078 if (func == drv->ops->set_default_key)
1079 dev->ieee80211_ptr->wext.default_key = key_idx;
1080 else
1081 dev->ieee80211_ptr->wext.default_mgmt_key = key_idx;
1082 }
1083 #endif
1084
1085 out:
1086 cfg80211_put_dev(drv);
1087 dev_put(dev);
1088
1089 unlock_rtnl:
1090 rtnl_unlock();
1091
1092 return err;
1093 }
1094
1095 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1096 {
1097 struct cfg80211_registered_device *drv;
1098 int err, i;
1099 struct net_device *dev;
1100 struct key_params params;
1101 u8 key_idx = 0;
1102 u8 *mac_addr = NULL;
1103
1104 memset(&params, 0, sizeof(params));
1105
1106 if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
1107 return -EINVAL;
1108
1109 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
1110 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
1111 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
1112 }
1113
1114 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
1115 params.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
1116 params.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
1117 }
1118
1119 if (info->attrs[NL80211_ATTR_KEY_IDX])
1120 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1121
1122 params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
1123
1124 if (info->attrs[NL80211_ATTR_MAC])
1125 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1126
1127 if (cfg80211_validate_key_settings(&params, key_idx, mac_addr))
1128 return -EINVAL;
1129
1130 rtnl_lock();
1131
1132 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1133 if (err)
1134 goto unlock_rtnl;
1135
1136 for (i = 0; i < drv->wiphy.n_cipher_suites; i++)
1137 if (params.cipher == drv->wiphy.cipher_suites[i])
1138 break;
1139 if (i == drv->wiphy.n_cipher_suites) {
1140 err = -EINVAL;
1141 goto out;
1142 }
1143
1144 if (!drv->ops->add_key) {
1145 err = -EOPNOTSUPP;
1146 goto out;
1147 }
1148
1149 err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
1150
1151 out:
1152 cfg80211_put_dev(drv);
1153 dev_put(dev);
1154 unlock_rtnl:
1155 rtnl_unlock();
1156
1157 return err;
1158 }
1159
1160 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1161 {
1162 struct cfg80211_registered_device *drv;
1163 int err;
1164 struct net_device *dev;
1165 u8 key_idx = 0;
1166 u8 *mac_addr = NULL;
1167
1168 if (info->attrs[NL80211_ATTR_KEY_IDX])
1169 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1170
1171 if (key_idx > 5)
1172 return -EINVAL;
1173
1174 if (info->attrs[NL80211_ATTR_MAC])
1175 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1176
1177 rtnl_lock();
1178
1179 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1180 if (err)
1181 goto unlock_rtnl;
1182
1183 if (!drv->ops->del_key) {
1184 err = -EOPNOTSUPP;
1185 goto out;
1186 }
1187
1188 err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
1189
1190 #ifdef CONFIG_WIRELESS_EXT
1191 if (!err) {
1192 if (key_idx == dev->ieee80211_ptr->wext.default_key)
1193 dev->ieee80211_ptr->wext.default_key = -1;
1194 else if (key_idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1195 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1196 }
1197 #endif
1198
1199 out:
1200 cfg80211_put_dev(drv);
1201 dev_put(dev);
1202
1203 unlock_rtnl:
1204 rtnl_unlock();
1205
1206 return err;
1207 }
1208
1209 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1210 {
1211 int (*call)(struct wiphy *wiphy, struct net_device *dev,
1212 struct beacon_parameters *info);
1213 struct cfg80211_registered_device *drv;
1214 int err;
1215 struct net_device *dev;
1216 struct beacon_parameters params;
1217 int haveinfo = 0;
1218
1219 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1220 return -EINVAL;
1221
1222 rtnl_lock();
1223
1224 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1225 if (err)
1226 goto unlock_rtnl;
1227
1228 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1229 err = -EOPNOTSUPP;
1230 goto out;
1231 }
1232
1233 switch (info->genlhdr->cmd) {
1234 case NL80211_CMD_NEW_BEACON:
1235 /* these are required for NEW_BEACON */
1236 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1237 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1238 !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1239 err = -EINVAL;
1240 goto out;
1241 }
1242
1243 call = drv->ops->add_beacon;
1244 break;
1245 case NL80211_CMD_SET_BEACON:
1246 call = drv->ops->set_beacon;
1247 break;
1248 default:
1249 WARN_ON(1);
1250 err = -EOPNOTSUPP;
1251 goto out;
1252 }
1253
1254 if (!call) {
1255 err = -EOPNOTSUPP;
1256 goto out;
1257 }
1258
1259 memset(&params, 0, sizeof(params));
1260
1261 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1262 params.interval =
1263 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1264 haveinfo = 1;
1265 }
1266
1267 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1268 params.dtim_period =
1269 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1270 haveinfo = 1;
1271 }
1272
1273 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1274 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1275 params.head_len =
1276 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1277 haveinfo = 1;
1278 }
1279
1280 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1281 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1282 params.tail_len =
1283 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1284 haveinfo = 1;
1285 }
1286
1287 if (!haveinfo) {
1288 err = -EINVAL;
1289 goto out;
1290 }
1291
1292 err = call(&drv->wiphy, dev, &params);
1293
1294 out:
1295 cfg80211_put_dev(drv);
1296 dev_put(dev);
1297 unlock_rtnl:
1298 rtnl_unlock();
1299
1300 return err;
1301 }
1302
1303 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1304 {
1305 struct cfg80211_registered_device *drv;
1306 int err;
1307 struct net_device *dev;
1308
1309 rtnl_lock();
1310
1311 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1312 if (err)
1313 goto unlock_rtnl;
1314
1315 if (!drv->ops->del_beacon) {
1316 err = -EOPNOTSUPP;
1317 goto out;
1318 }
1319
1320 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1321 err = -EOPNOTSUPP;
1322 goto out;
1323 }
1324 err = drv->ops->del_beacon(&drv->wiphy, dev);
1325
1326 out:
1327 cfg80211_put_dev(drv);
1328 dev_put(dev);
1329 unlock_rtnl:
1330 rtnl_unlock();
1331
1332 return err;
1333 }
1334
1335 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1336 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1337 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1338 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1339 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1340 };
1341
1342 static int parse_station_flags(struct genl_info *info,
1343 struct station_parameters *params)
1344 {
1345 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1346 struct nlattr *nla;
1347 int flag;
1348
1349 /*
1350 * Try parsing the new attribute first so userspace
1351 * can specify both for older kernels.
1352 */
1353 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1354 if (nla) {
1355 struct nl80211_sta_flag_update *sta_flags;
1356
1357 sta_flags = nla_data(nla);
1358 params->sta_flags_mask = sta_flags->mask;
1359 params->sta_flags_set = sta_flags->set;
1360 if ((params->sta_flags_mask |
1361 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1362 return -EINVAL;
1363 return 0;
1364 }
1365
1366 /* if present, parse the old attribute */
1367
1368 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1369 if (!nla)
1370 return 0;
1371
1372 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1373 nla, sta_flags_policy))
1374 return -EINVAL;
1375
1376 params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1377 params->sta_flags_mask &= ~1;
1378
1379 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1380 if (flags[flag])
1381 params->sta_flags_set |= (1<<flag);
1382
1383 return 0;
1384 }
1385
1386 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1387 {
1388 int modulation, streams, bitrate;
1389
1390 if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1391 return rate->legacy;
1392
1393 /* the formula below does only work for MCS values smaller than 32 */
1394 if (rate->mcs >= 32)
1395 return 0;
1396
1397 modulation = rate->mcs & 7;
1398 streams = (rate->mcs >> 3) + 1;
1399
1400 bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1401 13500000 : 6500000;
1402
1403 if (modulation < 4)
1404 bitrate *= (modulation + 1);
1405 else if (modulation == 4)
1406 bitrate *= (modulation + 2);
1407 else
1408 bitrate *= (modulation + 3);
1409
1410 bitrate *= streams;
1411
1412 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1413 bitrate = (bitrate / 9) * 10;
1414
1415 /* do NOT round down here */
1416 return (bitrate + 50000) / 100000;
1417 }
1418
1419 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1420 int flags, struct net_device *dev,
1421 u8 *mac_addr, struct station_info *sinfo)
1422 {
1423 void *hdr;
1424 struct nlattr *sinfoattr, *txrate;
1425 u16 bitrate;
1426
1427 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1428 if (!hdr)
1429 return -1;
1430
1431 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1432 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1433
1434 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1435 if (!sinfoattr)
1436 goto nla_put_failure;
1437 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1438 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1439 sinfo->inactive_time);
1440 if (sinfo->filled & STATION_INFO_RX_BYTES)
1441 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1442 sinfo->rx_bytes);
1443 if (sinfo->filled & STATION_INFO_TX_BYTES)
1444 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1445 sinfo->tx_bytes);
1446 if (sinfo->filled & STATION_INFO_LLID)
1447 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1448 sinfo->llid);
1449 if (sinfo->filled & STATION_INFO_PLID)
1450 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1451 sinfo->plid);
1452 if (sinfo->filled & STATION_INFO_PLINK_STATE)
1453 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1454 sinfo->plink_state);
1455 if (sinfo->filled & STATION_INFO_SIGNAL)
1456 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1457 sinfo->signal);
1458 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1459 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1460 if (!txrate)
1461 goto nla_put_failure;
1462
1463 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1464 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1465 if (bitrate > 0)
1466 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1467
1468 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1469 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1470 sinfo->txrate.mcs);
1471 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1472 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1473 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1474 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1475
1476 nla_nest_end(msg, txrate);
1477 }
1478 if (sinfo->filled & STATION_INFO_RX_PACKETS)
1479 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1480 sinfo->rx_packets);
1481 if (sinfo->filled & STATION_INFO_TX_PACKETS)
1482 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1483 sinfo->tx_packets);
1484 nla_nest_end(msg, sinfoattr);
1485
1486 return genlmsg_end(msg, hdr);
1487
1488 nla_put_failure:
1489 genlmsg_cancel(msg, hdr);
1490 return -EMSGSIZE;
1491 }
1492
1493 static int nl80211_dump_station(struct sk_buff *skb,
1494 struct netlink_callback *cb)
1495 {
1496 struct station_info sinfo;
1497 struct cfg80211_registered_device *dev;
1498 struct net_device *netdev;
1499 u8 mac_addr[ETH_ALEN];
1500 int ifidx = cb->args[0];
1501 int sta_idx = cb->args[1];
1502 int err;
1503
1504 if (!ifidx) {
1505 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1506 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1507 nl80211_policy);
1508 if (err)
1509 return err;
1510
1511 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1512 return -EINVAL;
1513
1514 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1515 if (!ifidx)
1516 return -EINVAL;
1517 }
1518
1519 rtnl_lock();
1520
1521 netdev = __dev_get_by_index(&init_net, ifidx);
1522 if (!netdev) {
1523 err = -ENODEV;
1524 goto out_rtnl;
1525 }
1526
1527 dev = cfg80211_get_dev_from_ifindex(ifidx);
1528 if (IS_ERR(dev)) {
1529 err = PTR_ERR(dev);
1530 goto out_rtnl;
1531 }
1532
1533 if (!dev->ops->dump_station) {
1534 err = -EOPNOTSUPP;
1535 goto out_err;
1536 }
1537
1538 while (1) {
1539 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1540 mac_addr, &sinfo);
1541 if (err == -ENOENT)
1542 break;
1543 if (err)
1544 goto out_err;
1545
1546 if (nl80211_send_station(skb,
1547 NETLINK_CB(cb->skb).pid,
1548 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1549 netdev, mac_addr,
1550 &sinfo) < 0)
1551 goto out;
1552
1553 sta_idx++;
1554 }
1555
1556
1557 out:
1558 cb->args[1] = sta_idx;
1559 err = skb->len;
1560 out_err:
1561 cfg80211_put_dev(dev);
1562 out_rtnl:
1563 rtnl_unlock();
1564
1565 return err;
1566 }
1567
1568 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1569 {
1570 struct cfg80211_registered_device *drv;
1571 int err;
1572 struct net_device *dev;
1573 struct station_info sinfo;
1574 struct sk_buff *msg;
1575 u8 *mac_addr = NULL;
1576
1577 memset(&sinfo, 0, sizeof(sinfo));
1578
1579 if (!info->attrs[NL80211_ATTR_MAC])
1580 return -EINVAL;
1581
1582 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1583
1584 rtnl_lock();
1585
1586 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1587 if (err)
1588 goto out_rtnl;
1589
1590 if (!drv->ops->get_station) {
1591 err = -EOPNOTSUPP;
1592 goto out;
1593 }
1594
1595 err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1596 if (err)
1597 goto out;
1598
1599 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1600 if (!msg)
1601 goto out;
1602
1603 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1604 dev, mac_addr, &sinfo) < 0)
1605 goto out_free;
1606
1607 err = genlmsg_unicast(msg, info->snd_pid);
1608 goto out;
1609
1610 out_free:
1611 nlmsg_free(msg);
1612 out:
1613 cfg80211_put_dev(drv);
1614 dev_put(dev);
1615 out_rtnl:
1616 rtnl_unlock();
1617
1618 return err;
1619 }
1620
1621 /*
1622 * Get vlan interface making sure it is on the right wiphy.
1623 */
1624 static int get_vlan(struct nlattr *vlanattr,
1625 struct cfg80211_registered_device *rdev,
1626 struct net_device **vlan)
1627 {
1628 *vlan = NULL;
1629
1630 if (vlanattr) {
1631 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1632 if (!*vlan)
1633 return -ENODEV;
1634 if (!(*vlan)->ieee80211_ptr)
1635 return -EINVAL;
1636 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1637 return -EINVAL;
1638 }
1639 return 0;
1640 }
1641
1642 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1643 {
1644 struct cfg80211_registered_device *drv;
1645 int err;
1646 struct net_device *dev;
1647 struct station_parameters params;
1648 u8 *mac_addr = NULL;
1649
1650 memset(&params, 0, sizeof(params));
1651
1652 params.listen_interval = -1;
1653
1654 if (info->attrs[NL80211_ATTR_STA_AID])
1655 return -EINVAL;
1656
1657 if (!info->attrs[NL80211_ATTR_MAC])
1658 return -EINVAL;
1659
1660 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1661
1662 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1663 params.supported_rates =
1664 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1665 params.supported_rates_len =
1666 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1667 }
1668
1669 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1670 params.listen_interval =
1671 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1672
1673 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1674 params.ht_capa =
1675 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1676
1677 if (parse_station_flags(info, &params))
1678 return -EINVAL;
1679
1680 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1681 params.plink_action =
1682 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1683
1684 rtnl_lock();
1685
1686 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1687 if (err)
1688 goto out_rtnl;
1689
1690 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1691 if (err)
1692 goto out;
1693
1694 /* validate settings */
1695 err = 0;
1696
1697 switch (dev->ieee80211_ptr->iftype) {
1698 case NL80211_IFTYPE_AP:
1699 case NL80211_IFTYPE_AP_VLAN:
1700 /* disallow mesh-specific things */
1701 if (params.plink_action)
1702 err = -EINVAL;
1703 break;
1704 case NL80211_IFTYPE_STATION:
1705 /* disallow everything but AUTHORIZED flag */
1706 if (params.plink_action)
1707 err = -EINVAL;
1708 if (params.vlan)
1709 err = -EINVAL;
1710 if (params.supported_rates)
1711 err = -EINVAL;
1712 if (params.ht_capa)
1713 err = -EINVAL;
1714 if (params.listen_interval >= 0)
1715 err = -EINVAL;
1716 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1717 err = -EINVAL;
1718 break;
1719 case NL80211_IFTYPE_MESH_POINT:
1720 /* disallow things mesh doesn't support */
1721 if (params.vlan)
1722 err = -EINVAL;
1723 if (params.ht_capa)
1724 err = -EINVAL;
1725 if (params.listen_interval >= 0)
1726 err = -EINVAL;
1727 if (params.supported_rates)
1728 err = -EINVAL;
1729 if (params.sta_flags_mask)
1730 err = -EINVAL;
1731 break;
1732 default:
1733 err = -EINVAL;
1734 }
1735
1736 if (err)
1737 goto out;
1738
1739 if (!drv->ops->change_station) {
1740 err = -EOPNOTSUPP;
1741 goto out;
1742 }
1743
1744 err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1745
1746 out:
1747 if (params.vlan)
1748 dev_put(params.vlan);
1749 cfg80211_put_dev(drv);
1750 dev_put(dev);
1751 out_rtnl:
1752 rtnl_unlock();
1753
1754 return err;
1755 }
1756
1757 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1758 {
1759 struct cfg80211_registered_device *drv;
1760 int err;
1761 struct net_device *dev;
1762 struct station_parameters params;
1763 u8 *mac_addr = NULL;
1764
1765 memset(&params, 0, sizeof(params));
1766
1767 if (!info->attrs[NL80211_ATTR_MAC])
1768 return -EINVAL;
1769
1770 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1771 return -EINVAL;
1772
1773 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1774 return -EINVAL;
1775
1776 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1777 params.supported_rates =
1778 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1779 params.supported_rates_len =
1780 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1781 params.listen_interval =
1782 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1783
1784 if (info->attrs[NL80211_ATTR_STA_AID]) {
1785 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1786 if (!params.aid || params.aid > IEEE80211_MAX_AID)
1787 return -EINVAL;
1788 }
1789
1790 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1791 params.ht_capa =
1792 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1793
1794 if (parse_station_flags(info, &params))
1795 return -EINVAL;
1796
1797 rtnl_lock();
1798
1799 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1800 if (err)
1801 goto out_rtnl;
1802
1803 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1804 if (err)
1805 goto out;
1806
1807 /* validate settings */
1808 err = 0;
1809
1810 switch (dev->ieee80211_ptr->iftype) {
1811 case NL80211_IFTYPE_AP:
1812 case NL80211_IFTYPE_AP_VLAN:
1813 /* all ok but must have AID */
1814 if (!params.aid)
1815 err = -EINVAL;
1816 break;
1817 case NL80211_IFTYPE_MESH_POINT:
1818 /* disallow things mesh doesn't support */
1819 if (params.vlan)
1820 err = -EINVAL;
1821 if (params.aid)
1822 err = -EINVAL;
1823 if (params.ht_capa)
1824 err = -EINVAL;
1825 if (params.listen_interval >= 0)
1826 err = -EINVAL;
1827 if (params.supported_rates)
1828 err = -EINVAL;
1829 if (params.sta_flags_mask)
1830 err = -EINVAL;
1831 break;
1832 default:
1833 err = -EINVAL;
1834 }
1835
1836 if (err)
1837 goto out;
1838
1839 if (!drv->ops->add_station) {
1840 err = -EOPNOTSUPP;
1841 goto out;
1842 }
1843
1844 if (!netif_running(dev)) {
1845 err = -ENETDOWN;
1846 goto out;
1847 }
1848
1849 err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1850
1851 out:
1852 if (params.vlan)
1853 dev_put(params.vlan);
1854 cfg80211_put_dev(drv);
1855 dev_put(dev);
1856 out_rtnl:
1857 rtnl_unlock();
1858
1859 return err;
1860 }
1861
1862 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1863 {
1864 struct cfg80211_registered_device *drv;
1865 int err;
1866 struct net_device *dev;
1867 u8 *mac_addr = NULL;
1868
1869 if (info->attrs[NL80211_ATTR_MAC])
1870 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1871
1872 rtnl_lock();
1873
1874 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1875 if (err)
1876 goto out_rtnl;
1877
1878 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1879 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
1880 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1881 err = -EINVAL;
1882 goto out;
1883 }
1884
1885 if (!drv->ops->del_station) {
1886 err = -EOPNOTSUPP;
1887 goto out;
1888 }
1889
1890 err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1891
1892 out:
1893 cfg80211_put_dev(drv);
1894 dev_put(dev);
1895 out_rtnl:
1896 rtnl_unlock();
1897
1898 return err;
1899 }
1900
1901 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1902 int flags, struct net_device *dev,
1903 u8 *dst, u8 *next_hop,
1904 struct mpath_info *pinfo)
1905 {
1906 void *hdr;
1907 struct nlattr *pinfoattr;
1908
1909 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1910 if (!hdr)
1911 return -1;
1912
1913 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1914 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1915 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1916
1917 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1918 if (!pinfoattr)
1919 goto nla_put_failure;
1920 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1921 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1922 pinfo->frame_qlen);
1923 if (pinfo->filled & MPATH_INFO_DSN)
1924 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1925 pinfo->dsn);
1926 if (pinfo->filled & MPATH_INFO_METRIC)
1927 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1928 pinfo->metric);
1929 if (pinfo->filled & MPATH_INFO_EXPTIME)
1930 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1931 pinfo->exptime);
1932 if (pinfo->filled & MPATH_INFO_FLAGS)
1933 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1934 pinfo->flags);
1935 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1936 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1937 pinfo->discovery_timeout);
1938 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1939 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1940 pinfo->discovery_retries);
1941
1942 nla_nest_end(msg, pinfoattr);
1943
1944 return genlmsg_end(msg, hdr);
1945
1946 nla_put_failure:
1947 genlmsg_cancel(msg, hdr);
1948 return -EMSGSIZE;
1949 }
1950
1951 static int nl80211_dump_mpath(struct sk_buff *skb,
1952 struct netlink_callback *cb)
1953 {
1954 struct mpath_info pinfo;
1955 struct cfg80211_registered_device *dev;
1956 struct net_device *netdev;
1957 u8 dst[ETH_ALEN];
1958 u8 next_hop[ETH_ALEN];
1959 int ifidx = cb->args[0];
1960 int path_idx = cb->args[1];
1961 int err;
1962
1963 if (!ifidx) {
1964 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1965 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1966 nl80211_policy);
1967 if (err)
1968 return err;
1969
1970 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1971 return -EINVAL;
1972
1973 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1974 if (!ifidx)
1975 return -EINVAL;
1976 }
1977
1978 rtnl_lock();
1979
1980 netdev = __dev_get_by_index(&init_net, ifidx);
1981 if (!netdev) {
1982 err = -ENODEV;
1983 goto out_rtnl;
1984 }
1985
1986 dev = cfg80211_get_dev_from_ifindex(ifidx);
1987 if (IS_ERR(dev)) {
1988 err = PTR_ERR(dev);
1989 goto out_rtnl;
1990 }
1991
1992 if (!dev->ops->dump_mpath) {
1993 err = -EOPNOTSUPP;
1994 goto out_err;
1995 }
1996
1997 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1998 err = -EOPNOTSUPP;
1999 goto out;
2000 }
2001
2002 while (1) {
2003 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2004 dst, next_hop, &pinfo);
2005 if (err == -ENOENT)
2006 break;
2007 if (err)
2008 goto out_err;
2009
2010 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2011 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2012 netdev, dst, next_hop,
2013 &pinfo) < 0)
2014 goto out;
2015
2016 path_idx++;
2017 }
2018
2019
2020 out:
2021 cb->args[1] = path_idx;
2022 err = skb->len;
2023 out_err:
2024 cfg80211_put_dev(dev);
2025 out_rtnl:
2026 rtnl_unlock();
2027
2028 return err;
2029 }
2030
2031 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2032 {
2033 struct cfg80211_registered_device *drv;
2034 int err;
2035 struct net_device *dev;
2036 struct mpath_info pinfo;
2037 struct sk_buff *msg;
2038 u8 *dst = NULL;
2039 u8 next_hop[ETH_ALEN];
2040
2041 memset(&pinfo, 0, sizeof(pinfo));
2042
2043 if (!info->attrs[NL80211_ATTR_MAC])
2044 return -EINVAL;
2045
2046 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2047
2048 rtnl_lock();
2049
2050 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2051 if (err)
2052 goto out_rtnl;
2053
2054 if (!drv->ops->get_mpath) {
2055 err = -EOPNOTSUPP;
2056 goto out;
2057 }
2058
2059 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2060 err = -EOPNOTSUPP;
2061 goto out;
2062 }
2063
2064 err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
2065 if (err)
2066 goto out;
2067
2068 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2069 if (!msg)
2070 goto out;
2071
2072 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2073 dev, dst, next_hop, &pinfo) < 0)
2074 goto out_free;
2075
2076 err = genlmsg_unicast(msg, info->snd_pid);
2077 goto out;
2078
2079 out_free:
2080 nlmsg_free(msg);
2081 out:
2082 cfg80211_put_dev(drv);
2083 dev_put(dev);
2084 out_rtnl:
2085 rtnl_unlock();
2086
2087 return err;
2088 }
2089
2090 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2091 {
2092 struct cfg80211_registered_device *drv;
2093 int err;
2094 struct net_device *dev;
2095 u8 *dst = NULL;
2096 u8 *next_hop = NULL;
2097
2098 if (!info->attrs[NL80211_ATTR_MAC])
2099 return -EINVAL;
2100
2101 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2102 return -EINVAL;
2103
2104 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2105 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2106
2107 rtnl_lock();
2108
2109 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2110 if (err)
2111 goto out_rtnl;
2112
2113 if (!drv->ops->change_mpath) {
2114 err = -EOPNOTSUPP;
2115 goto out;
2116 }
2117
2118 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2119 err = -EOPNOTSUPP;
2120 goto out;
2121 }
2122
2123 if (!netif_running(dev)) {
2124 err = -ENETDOWN;
2125 goto out;
2126 }
2127
2128 err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
2129
2130 out:
2131 cfg80211_put_dev(drv);
2132 dev_put(dev);
2133 out_rtnl:
2134 rtnl_unlock();
2135
2136 return err;
2137 }
2138 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2139 {
2140 struct cfg80211_registered_device *drv;
2141 int err;
2142 struct net_device *dev;
2143 u8 *dst = NULL;
2144 u8 *next_hop = NULL;
2145
2146 if (!info->attrs[NL80211_ATTR_MAC])
2147 return -EINVAL;
2148
2149 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2150 return -EINVAL;
2151
2152 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2153 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2154
2155 rtnl_lock();
2156
2157 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2158 if (err)
2159 goto out_rtnl;
2160
2161 if (!drv->ops->add_mpath) {
2162 err = -EOPNOTSUPP;
2163 goto out;
2164 }
2165
2166 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2167 err = -EOPNOTSUPP;
2168 goto out;
2169 }
2170
2171 if (!netif_running(dev)) {
2172 err = -ENETDOWN;
2173 goto out;
2174 }
2175
2176 err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
2177
2178 out:
2179 cfg80211_put_dev(drv);
2180 dev_put(dev);
2181 out_rtnl:
2182 rtnl_unlock();
2183
2184 return err;
2185 }
2186
2187 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2188 {
2189 struct cfg80211_registered_device *drv;
2190 int err;
2191 struct net_device *dev;
2192 u8 *dst = NULL;
2193
2194 if (info->attrs[NL80211_ATTR_MAC])
2195 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2196
2197 rtnl_lock();
2198
2199 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2200 if (err)
2201 goto out_rtnl;
2202
2203 if (!drv->ops->del_mpath) {
2204 err = -EOPNOTSUPP;
2205 goto out;
2206 }
2207
2208 err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
2209
2210 out:
2211 cfg80211_put_dev(drv);
2212 dev_put(dev);
2213 out_rtnl:
2214 rtnl_unlock();
2215
2216 return err;
2217 }
2218
2219 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2220 {
2221 struct cfg80211_registered_device *drv;
2222 int err;
2223 struct net_device *dev;
2224 struct bss_parameters params;
2225
2226 memset(&params, 0, sizeof(params));
2227 /* default to not changing parameters */
2228 params.use_cts_prot = -1;
2229 params.use_short_preamble = -1;
2230 params.use_short_slot_time = -1;
2231
2232 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2233 params.use_cts_prot =
2234 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2235 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2236 params.use_short_preamble =
2237 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2238 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2239 params.use_short_slot_time =
2240 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2241 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2242 params.basic_rates =
2243 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2244 params.basic_rates_len =
2245 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2246 }
2247
2248 rtnl_lock();
2249
2250 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2251 if (err)
2252 goto out_rtnl;
2253
2254 if (!drv->ops->change_bss) {
2255 err = -EOPNOTSUPP;
2256 goto out;
2257 }
2258
2259 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2260 err = -EOPNOTSUPP;
2261 goto out;
2262 }
2263
2264 err = drv->ops->change_bss(&drv->wiphy, dev, &params);
2265
2266 out:
2267 cfg80211_put_dev(drv);
2268 dev_put(dev);
2269 out_rtnl:
2270 rtnl_unlock();
2271
2272 return err;
2273 }
2274
2275 static const struct nla_policy
2276 reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2277 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
2278 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
2279 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
2280 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
2281 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
2282 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
2283 };
2284
2285 static int parse_reg_rule(struct nlattr *tb[],
2286 struct ieee80211_reg_rule *reg_rule)
2287 {
2288 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2289 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2290
2291 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2292 return -EINVAL;
2293 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2294 return -EINVAL;
2295 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2296 return -EINVAL;
2297 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2298 return -EINVAL;
2299 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2300 return -EINVAL;
2301
2302 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2303
2304 freq_range->start_freq_khz =
2305 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2306 freq_range->end_freq_khz =
2307 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2308 freq_range->max_bandwidth_khz =
2309 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2310
2311 power_rule->max_eirp =
2312 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2313
2314 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2315 power_rule->max_antenna_gain =
2316 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2317
2318 return 0;
2319 }
2320
2321 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2322 {
2323 int r;
2324 char *data = NULL;
2325
2326 /*
2327 * You should only get this when cfg80211 hasn't yet initialized
2328 * completely when built-in to the kernel right between the time
2329 * window between nl80211_init() and regulatory_init(), if that is
2330 * even possible.
2331 */
2332 mutex_lock(&cfg80211_mutex);
2333 if (unlikely(!cfg80211_regdomain)) {
2334 mutex_unlock(&cfg80211_mutex);
2335 return -EINPROGRESS;
2336 }
2337 mutex_unlock(&cfg80211_mutex);
2338
2339 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2340 return -EINVAL;
2341
2342 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2343
2344 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2345 /* We ignore world regdom requests with the old regdom setup */
2346 if (is_world_regdom(data))
2347 return -EINVAL;
2348 #endif
2349
2350 r = regulatory_hint_user(data);
2351
2352 return r;
2353 }
2354
2355 static int nl80211_get_mesh_params(struct sk_buff *skb,
2356 struct genl_info *info)
2357 {
2358 struct cfg80211_registered_device *drv;
2359 struct mesh_config cur_params;
2360 int err;
2361 struct net_device *dev;
2362 void *hdr;
2363 struct nlattr *pinfoattr;
2364 struct sk_buff *msg;
2365
2366 rtnl_lock();
2367
2368 /* Look up our device */
2369 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2370 if (err)
2371 goto out_rtnl;
2372
2373 if (!drv->ops->get_mesh_params) {
2374 err = -EOPNOTSUPP;
2375 goto out;
2376 }
2377
2378 /* Get the mesh params */
2379 err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params);
2380 if (err)
2381 goto out;
2382
2383 /* Draw up a netlink message to send back */
2384 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2385 if (!msg) {
2386 err = -ENOBUFS;
2387 goto out;
2388 }
2389 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2390 NL80211_CMD_GET_MESH_PARAMS);
2391 if (!hdr)
2392 goto nla_put_failure;
2393 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2394 if (!pinfoattr)
2395 goto nla_put_failure;
2396 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2397 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2398 cur_params.dot11MeshRetryTimeout);
2399 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2400 cur_params.dot11MeshConfirmTimeout);
2401 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2402 cur_params.dot11MeshHoldingTimeout);
2403 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2404 cur_params.dot11MeshMaxPeerLinks);
2405 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2406 cur_params.dot11MeshMaxRetries);
2407 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2408 cur_params.dot11MeshTTL);
2409 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2410 cur_params.auto_open_plinks);
2411 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2412 cur_params.dot11MeshHWMPmaxPREQretries);
2413 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2414 cur_params.path_refresh_time);
2415 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2416 cur_params.min_discovery_timeout);
2417 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2418 cur_params.dot11MeshHWMPactivePathTimeout);
2419 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2420 cur_params.dot11MeshHWMPpreqMinInterval);
2421 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2422 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2423 nla_nest_end(msg, pinfoattr);
2424 genlmsg_end(msg, hdr);
2425 err = genlmsg_unicast(msg, info->snd_pid);
2426 goto out;
2427
2428 nla_put_failure:
2429 genlmsg_cancel(msg, hdr);
2430 err = -EMSGSIZE;
2431 out:
2432 /* Cleanup */
2433 cfg80211_put_dev(drv);
2434 dev_put(dev);
2435 out_rtnl:
2436 rtnl_unlock();
2437
2438 return err;
2439 }
2440
2441 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2442 do {\
2443 if (table[attr_num]) {\
2444 cfg.param = nla_fn(table[attr_num]); \
2445 mask |= (1 << (attr_num - 1)); \
2446 } \
2447 } while (0);\
2448
2449 static struct nla_policy
2450 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2451 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2452 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2453 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2454 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2455 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2456 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2457 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2458
2459 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2460 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2461 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2462 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2463 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2464 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2465 };
2466
2467 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2468 {
2469 int err;
2470 u32 mask;
2471 struct cfg80211_registered_device *drv;
2472 struct net_device *dev;
2473 struct mesh_config cfg;
2474 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2475 struct nlattr *parent_attr;
2476
2477 parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2478 if (!parent_attr)
2479 return -EINVAL;
2480 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2481 parent_attr, nl80211_meshconf_params_policy))
2482 return -EINVAL;
2483
2484 rtnl_lock();
2485
2486 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2487 if (err)
2488 goto out_rtnl;
2489
2490 if (!drv->ops->set_mesh_params) {
2491 err = -EOPNOTSUPP;
2492 goto out;
2493 }
2494
2495 /* This makes sure that there aren't more than 32 mesh config
2496 * parameters (otherwise our bitfield scheme would not work.) */
2497 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2498
2499 /* Fill in the params struct */
2500 mask = 0;
2501 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2502 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2503 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2504 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2505 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2506 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2507 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2508 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2509 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2510 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2511 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2512 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2513 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2514 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2515 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2516 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2517 nla_get_u8);
2518 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2519 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2520 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2521 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2522 nla_get_u16);
2523 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2524 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2525 nla_get_u32);
2526 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2527 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2528 nla_get_u16);
2529 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2530 dot11MeshHWMPnetDiameterTraversalTime,
2531 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2532 nla_get_u16);
2533
2534 /* Apply changes */
2535 err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask);
2536
2537 out:
2538 /* cleanup */
2539 cfg80211_put_dev(drv);
2540 dev_put(dev);
2541 out_rtnl:
2542 rtnl_unlock();
2543
2544 return err;
2545 }
2546
2547 #undef FILL_IN_MESH_PARAM_IF_SET
2548
2549 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2550 {
2551 struct sk_buff *msg;
2552 void *hdr = NULL;
2553 struct nlattr *nl_reg_rules;
2554 unsigned int i;
2555 int err = -EINVAL;
2556
2557 mutex_lock(&cfg80211_mutex);
2558
2559 if (!cfg80211_regdomain)
2560 goto out;
2561
2562 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2563 if (!msg) {
2564 err = -ENOBUFS;
2565 goto out;
2566 }
2567
2568 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2569 NL80211_CMD_GET_REG);
2570 if (!hdr)
2571 goto nla_put_failure;
2572
2573 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2574 cfg80211_regdomain->alpha2);
2575
2576 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2577 if (!nl_reg_rules)
2578 goto nla_put_failure;
2579
2580 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2581 struct nlattr *nl_reg_rule;
2582 const struct ieee80211_reg_rule *reg_rule;
2583 const struct ieee80211_freq_range *freq_range;
2584 const struct ieee80211_power_rule *power_rule;
2585
2586 reg_rule = &cfg80211_regdomain->reg_rules[i];
2587 freq_range = &reg_rule->freq_range;
2588 power_rule = &reg_rule->power_rule;
2589
2590 nl_reg_rule = nla_nest_start(msg, i);
2591 if (!nl_reg_rule)
2592 goto nla_put_failure;
2593
2594 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2595 reg_rule->flags);
2596 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2597 freq_range->start_freq_khz);
2598 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2599 freq_range->end_freq_khz);
2600 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2601 freq_range->max_bandwidth_khz);
2602 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2603 power_rule->max_antenna_gain);
2604 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2605 power_rule->max_eirp);
2606
2607 nla_nest_end(msg, nl_reg_rule);
2608 }
2609
2610 nla_nest_end(msg, nl_reg_rules);
2611
2612 genlmsg_end(msg, hdr);
2613 err = genlmsg_unicast(msg, info->snd_pid);
2614 goto out;
2615
2616 nla_put_failure:
2617 genlmsg_cancel(msg, hdr);
2618 err = -EMSGSIZE;
2619 out:
2620 mutex_unlock(&cfg80211_mutex);
2621 return err;
2622 }
2623
2624 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2625 {
2626 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2627 struct nlattr *nl_reg_rule;
2628 char *alpha2 = NULL;
2629 int rem_reg_rules = 0, r = 0;
2630 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2631 struct ieee80211_regdomain *rd = NULL;
2632
2633 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2634 return -EINVAL;
2635
2636 if (!info->attrs[NL80211_ATTR_REG_RULES])
2637 return -EINVAL;
2638
2639 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2640
2641 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2642 rem_reg_rules) {
2643 num_rules++;
2644 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2645 return -EINVAL;
2646 }
2647
2648 mutex_lock(&cfg80211_mutex);
2649
2650 if (!reg_is_valid_request(alpha2)) {
2651 r = -EINVAL;
2652 goto bad_reg;
2653 }
2654
2655 size_of_regd = sizeof(struct ieee80211_regdomain) +
2656 (num_rules * sizeof(struct ieee80211_reg_rule));
2657
2658 rd = kzalloc(size_of_regd, GFP_KERNEL);
2659 if (!rd) {
2660 r = -ENOMEM;
2661 goto bad_reg;
2662 }
2663
2664 rd->n_reg_rules = num_rules;
2665 rd->alpha2[0] = alpha2[0];
2666 rd->alpha2[1] = alpha2[1];
2667
2668 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2669 rem_reg_rules) {
2670 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2671 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2672 reg_rule_policy);
2673 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2674 if (r)
2675 goto bad_reg;
2676
2677 rule_idx++;
2678
2679 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2680 r = -EINVAL;
2681 goto bad_reg;
2682 }
2683 }
2684
2685 BUG_ON(rule_idx != num_rules);
2686
2687 r = set_regdom(rd);
2688
2689 mutex_unlock(&cfg80211_mutex);
2690
2691 return r;
2692
2693 bad_reg:
2694 mutex_unlock(&cfg80211_mutex);
2695 kfree(rd);
2696 return r;
2697 }
2698
2699 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2700 {
2701 struct cfg80211_registered_device *drv;
2702 struct net_device *dev;
2703 struct cfg80211_scan_request *request;
2704 struct cfg80211_ssid *ssid;
2705 struct ieee80211_channel *channel;
2706 struct nlattr *attr;
2707 struct wiphy *wiphy;
2708 int err, tmp, n_ssids = 0, n_channels = 0, i;
2709 enum ieee80211_band band;
2710 size_t ie_len;
2711
2712 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2713 return -EINVAL;
2714
2715 rtnl_lock();
2716
2717 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2718 if (err)
2719 goto out_rtnl;
2720
2721 wiphy = &drv->wiphy;
2722
2723 if (!drv->ops->scan) {
2724 err = -EOPNOTSUPP;
2725 goto out;
2726 }
2727
2728 if (!netif_running(dev)) {
2729 err = -ENETDOWN;
2730 goto out;
2731 }
2732
2733 if (drv->scan_req) {
2734 err = -EBUSY;
2735 goto out;
2736 }
2737
2738 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2739 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp)
2740 n_channels++;
2741 if (!n_channels) {
2742 err = -EINVAL;
2743 goto out;
2744 }
2745 } else {
2746 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2747 if (wiphy->bands[band])
2748 n_channels += wiphy->bands[band]->n_channels;
2749 }
2750
2751 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2752 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2753 n_ssids++;
2754
2755 if (n_ssids > wiphy->max_scan_ssids) {
2756 err = -EINVAL;
2757 goto out;
2758 }
2759
2760 if (info->attrs[NL80211_ATTR_IE])
2761 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2762 else
2763 ie_len = 0;
2764
2765 if (ie_len > wiphy->max_scan_ie_len) {
2766 err = -EINVAL;
2767 goto out;
2768 }
2769
2770 request = kzalloc(sizeof(*request)
2771 + sizeof(*ssid) * n_ssids
2772 + sizeof(channel) * n_channels
2773 + ie_len, GFP_KERNEL);
2774 if (!request) {
2775 err = -ENOMEM;
2776 goto out;
2777 }
2778
2779 request->channels = (void *)((char *)request + sizeof(*request));
2780 request->n_channels = n_channels;
2781 if (n_ssids)
2782 request->ssids = (void *)(request->channels + n_channels);
2783 request->n_ssids = n_ssids;
2784 if (ie_len) {
2785 if (request->ssids)
2786 request->ie = (void *)(request->ssids + n_ssids);
2787 else
2788 request->ie = (void *)(request->channels + n_channels);
2789 }
2790
2791 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2792 /* user specified, bail out if channel not found */
2793 request->n_channels = n_channels;
2794 i = 0;
2795 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2796 request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2797 if (!request->channels[i]) {
2798 err = -EINVAL;
2799 goto out_free;
2800 }
2801 i++;
2802 }
2803 } else {
2804 /* all channels */
2805 i = 0;
2806 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2807 int j;
2808 if (!wiphy->bands[band])
2809 continue;
2810 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2811 request->channels[i] = &wiphy->bands[band]->channels[j];
2812 i++;
2813 }
2814 }
2815 }
2816
2817 i = 0;
2818 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2819 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2820 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2821 err = -EINVAL;
2822 goto out_free;
2823 }
2824 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2825 request->ssids[i].ssid_len = nla_len(attr);
2826 i++;
2827 }
2828 }
2829
2830 if (info->attrs[NL80211_ATTR_IE]) {
2831 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2832 memcpy((void *)request->ie,
2833 nla_data(info->attrs[NL80211_ATTR_IE]),
2834 request->ie_len);
2835 }
2836
2837 request->ifidx = dev->ifindex;
2838 request->wiphy = &drv->wiphy;
2839
2840 drv->scan_req = request;
2841 err = drv->ops->scan(&drv->wiphy, dev, request);
2842
2843 out_free:
2844 if (err) {
2845 drv->scan_req = NULL;
2846 kfree(request);
2847 }
2848 out:
2849 cfg80211_put_dev(drv);
2850 dev_put(dev);
2851 out_rtnl:
2852 rtnl_unlock();
2853
2854 return err;
2855 }
2856
2857 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
2858 struct cfg80211_registered_device *rdev,
2859 struct net_device *dev,
2860 struct cfg80211_bss *res)
2861 {
2862 void *hdr;
2863 struct nlattr *bss;
2864
2865 hdr = nl80211hdr_put(msg, pid, seq, flags,
2866 NL80211_CMD_NEW_SCAN_RESULTS);
2867 if (!hdr)
2868 return -1;
2869
2870 NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
2871 rdev->bss_generation);
2872 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2873
2874 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
2875 if (!bss)
2876 goto nla_put_failure;
2877 if (!is_zero_ether_addr(res->bssid))
2878 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
2879 if (res->information_elements && res->len_information_elements)
2880 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
2881 res->len_information_elements,
2882 res->information_elements);
2883 if (res->tsf)
2884 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
2885 if (res->beacon_interval)
2886 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
2887 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
2888 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
2889
2890 switch (rdev->wiphy.signal_type) {
2891 case CFG80211_SIGNAL_TYPE_MBM:
2892 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
2893 break;
2894 case CFG80211_SIGNAL_TYPE_UNSPEC:
2895 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
2896 break;
2897 default:
2898 break;
2899 }
2900
2901 nla_nest_end(msg, bss);
2902
2903 return genlmsg_end(msg, hdr);
2904
2905 nla_put_failure:
2906 genlmsg_cancel(msg, hdr);
2907 return -EMSGSIZE;
2908 }
2909
2910 static int nl80211_dump_scan(struct sk_buff *skb,
2911 struct netlink_callback *cb)
2912 {
2913 struct cfg80211_registered_device *dev;
2914 struct net_device *netdev;
2915 struct cfg80211_internal_bss *scan;
2916 int ifidx = cb->args[0];
2917 int start = cb->args[1], idx = 0;
2918 int err;
2919
2920 if (!ifidx) {
2921 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2922 nl80211_fam.attrbuf, nl80211_fam.maxattr,
2923 nl80211_policy);
2924 if (err)
2925 return err;
2926
2927 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2928 return -EINVAL;
2929
2930 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2931 if (!ifidx)
2932 return -EINVAL;
2933 cb->args[0] = ifidx;
2934 }
2935
2936 netdev = dev_get_by_index(&init_net, ifidx);
2937 if (!netdev)
2938 return -ENODEV;
2939
2940 dev = cfg80211_get_dev_from_ifindex(ifidx);
2941 if (IS_ERR(dev)) {
2942 err = PTR_ERR(dev);
2943 goto out_put_netdev;
2944 }
2945
2946 spin_lock_bh(&dev->bss_lock);
2947 cfg80211_bss_expire(dev);
2948
2949 list_for_each_entry(scan, &dev->bss_list, list) {
2950 if (++idx <= start)
2951 continue;
2952 if (nl80211_send_bss(skb,
2953 NETLINK_CB(cb->skb).pid,
2954 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2955 dev, netdev, &scan->pub) < 0) {
2956 idx--;
2957 goto out;
2958 }
2959 }
2960
2961 out:
2962 spin_unlock_bh(&dev->bss_lock);
2963
2964 cb->args[1] = idx;
2965 err = skb->len;
2966 cfg80211_put_dev(dev);
2967 out_put_netdev:
2968 dev_put(netdev);
2969
2970 return err;
2971 }
2972
2973 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
2974 {
2975 return auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM ||
2976 auth_type == NL80211_AUTHTYPE_SHARED_KEY ||
2977 auth_type == NL80211_AUTHTYPE_FT ||
2978 auth_type == NL80211_AUTHTYPE_NETWORK_EAP;
2979 }
2980
2981 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
2982 {
2983 struct cfg80211_registered_device *drv;
2984 struct net_device *dev;
2985 struct cfg80211_auth_request req;
2986 struct wiphy *wiphy;
2987 int err;
2988
2989 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2990 return -EINVAL;
2991
2992 if (!info->attrs[NL80211_ATTR_MAC])
2993 return -EINVAL;
2994
2995 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
2996 return -EINVAL;
2997
2998 rtnl_lock();
2999
3000 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3001 if (err)
3002 goto unlock_rtnl;
3003
3004 if (!drv->ops->auth) {
3005 err = -EOPNOTSUPP;
3006 goto out;
3007 }
3008
3009 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3010 err = -EOPNOTSUPP;
3011 goto out;
3012 }
3013
3014 if (!netif_running(dev)) {
3015 err = -ENETDOWN;
3016 goto out;
3017 }
3018
3019 wiphy = &drv->wiphy;
3020 memset(&req, 0, sizeof(req));
3021
3022 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3023
3024 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3025 req.chan = ieee80211_get_channel(
3026 wiphy,
3027 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3028 if (!req.chan) {
3029 err = -EINVAL;
3030 goto out;
3031 }
3032 }
3033
3034 if (info->attrs[NL80211_ATTR_SSID]) {
3035 req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3036 req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3037 }
3038
3039 if (info->attrs[NL80211_ATTR_IE]) {
3040 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3041 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3042 }
3043
3044 req.auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3045 if (!nl80211_valid_auth_type(req.auth_type)) {
3046 err = -EINVAL;
3047 goto out;
3048 }
3049
3050 err = drv->ops->auth(&drv->wiphy, dev, &req);
3051
3052 out:
3053 cfg80211_put_dev(drv);
3054 dev_put(dev);
3055 unlock_rtnl:
3056 rtnl_unlock();
3057 return err;
3058 }
3059
3060 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3061 {
3062 struct cfg80211_registered_device *drv;
3063 struct net_device *dev;
3064 struct cfg80211_assoc_request req;
3065 struct wiphy *wiphy;
3066 int err;
3067
3068 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3069 return -EINVAL;
3070
3071 if (!info->attrs[NL80211_ATTR_MAC] ||
3072 !info->attrs[NL80211_ATTR_SSID])
3073 return -EINVAL;
3074
3075 rtnl_lock();
3076
3077 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3078 if (err)
3079 goto unlock_rtnl;
3080
3081 if (!drv->ops->assoc) {
3082 err = -EOPNOTSUPP;
3083 goto out;
3084 }
3085
3086 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3087 err = -EOPNOTSUPP;
3088 goto out;
3089 }
3090
3091 if (!netif_running(dev)) {
3092 err = -ENETDOWN;
3093 goto out;
3094 }
3095
3096 wiphy = &drv->wiphy;
3097 memset(&req, 0, sizeof(req));
3098
3099 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3100
3101 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3102 req.chan = ieee80211_get_channel(
3103 wiphy,
3104 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3105 if (!req.chan) {
3106 err = -EINVAL;
3107 goto out;
3108 }
3109 }
3110
3111 req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3112 req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3113
3114 if (info->attrs[NL80211_ATTR_IE]) {
3115 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3116 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3117 }
3118
3119 if (info->attrs[NL80211_ATTR_USE_MFP]) {
3120 enum nl80211_mfp use_mfp =
3121 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3122 if (use_mfp == NL80211_MFP_REQUIRED)
3123 req.use_mfp = true;
3124 else if (use_mfp != NL80211_MFP_NO) {
3125 err = -EINVAL;
3126 goto out;
3127 }
3128 }
3129
3130 req.control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3131
3132 err = drv->ops->assoc(&drv->wiphy, dev, &req);
3133
3134 out:
3135 cfg80211_put_dev(drv);
3136 dev_put(dev);
3137 unlock_rtnl:
3138 rtnl_unlock();
3139 return err;
3140 }
3141
3142 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3143 {
3144 struct cfg80211_registered_device *drv;
3145 struct net_device *dev;
3146 struct cfg80211_deauth_request req;
3147 struct wiphy *wiphy;
3148 int err;
3149
3150 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3151 return -EINVAL;
3152
3153 if (!info->attrs[NL80211_ATTR_MAC])
3154 return -EINVAL;
3155
3156 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3157 return -EINVAL;
3158
3159 rtnl_lock();
3160
3161 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3162 if (err)
3163 goto unlock_rtnl;
3164
3165 if (!drv->ops->deauth) {
3166 err = -EOPNOTSUPP;
3167 goto out;
3168 }
3169
3170 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3171 err = -EOPNOTSUPP;
3172 goto out;
3173 }
3174
3175 if (!netif_running(dev)) {
3176 err = -ENETDOWN;
3177 goto out;
3178 }
3179
3180 wiphy = &drv->wiphy;
3181 memset(&req, 0, sizeof(req));
3182
3183 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3184
3185 req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3186 if (req.reason_code == 0) {
3187 /* Reason Code 0 is reserved */
3188 err = -EINVAL;
3189 goto out;
3190 }
3191
3192 if (info->attrs[NL80211_ATTR_IE]) {
3193 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3194 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3195 }
3196
3197 err = drv->ops->deauth(&drv->wiphy, dev, &req);
3198
3199 out:
3200 cfg80211_put_dev(drv);
3201 dev_put(dev);
3202 unlock_rtnl:
3203 rtnl_unlock();
3204 return err;
3205 }
3206
3207 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3208 {
3209 struct cfg80211_registered_device *drv;
3210 struct net_device *dev;
3211 struct cfg80211_disassoc_request req;
3212 struct wiphy *wiphy;
3213 int err;
3214
3215 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3216 return -EINVAL;
3217
3218 if (!info->attrs[NL80211_ATTR_MAC])
3219 return -EINVAL;
3220
3221 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3222 return -EINVAL;
3223
3224 rtnl_lock();
3225
3226 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3227 if (err)
3228 goto unlock_rtnl;
3229
3230 if (!drv->ops->disassoc) {
3231 err = -EOPNOTSUPP;
3232 goto out;
3233 }
3234
3235 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3236 err = -EOPNOTSUPP;
3237 goto out;
3238 }
3239
3240 if (!netif_running(dev)) {
3241 err = -ENETDOWN;
3242 goto out;
3243 }
3244
3245 wiphy = &drv->wiphy;
3246 memset(&req, 0, sizeof(req));
3247
3248 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3249
3250 req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3251 if (req.reason_code == 0) {
3252 /* Reason Code 0 is reserved */
3253 err = -EINVAL;
3254 goto out;
3255 }
3256
3257 if (info->attrs[NL80211_ATTR_IE]) {
3258 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3259 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3260 }
3261
3262 err = drv->ops->disassoc(&drv->wiphy, dev, &req);
3263
3264 out:
3265 cfg80211_put_dev(drv);
3266 dev_put(dev);
3267 unlock_rtnl:
3268 rtnl_unlock();
3269 return err;
3270 }
3271
3272 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3273 {
3274 struct cfg80211_registered_device *drv;
3275 struct net_device *dev;
3276 struct cfg80211_ibss_params ibss;
3277 struct wiphy *wiphy;
3278 int err;
3279
3280 memset(&ibss, 0, sizeof(ibss));
3281
3282 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3283 return -EINVAL;
3284
3285 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3286 !info->attrs[NL80211_ATTR_SSID] ||
3287 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3288 return -EINVAL;
3289
3290 ibss.beacon_interval = 100;
3291
3292 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3293 ibss.beacon_interval =
3294 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3295 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3296 return -EINVAL;
3297 }
3298
3299 rtnl_lock();
3300
3301 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3302 if (err)
3303 goto unlock_rtnl;
3304
3305 if (!drv->ops->join_ibss) {
3306 err = -EOPNOTSUPP;
3307 goto out;
3308 }
3309
3310 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3311 err = -EOPNOTSUPP;
3312 goto out;
3313 }
3314
3315 if (!netif_running(dev)) {
3316 err = -ENETDOWN;
3317 goto out;
3318 }
3319
3320 wiphy = &drv->wiphy;
3321
3322 if (info->attrs[NL80211_ATTR_MAC])
3323 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3324 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3325 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3326
3327 if (info->attrs[NL80211_ATTR_IE]) {
3328 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3329 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3330 }
3331
3332 ibss.channel = ieee80211_get_channel(wiphy,
3333 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3334 if (!ibss.channel ||
3335 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3336 ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3337 err = -EINVAL;
3338 goto out;
3339 }
3340
3341 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3342
3343 err = cfg80211_join_ibss(drv, dev, &ibss);
3344
3345 out:
3346 cfg80211_put_dev(drv);
3347 dev_put(dev);
3348 unlock_rtnl:
3349 rtnl_unlock();
3350 return err;
3351 }
3352
3353 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3354 {
3355 struct cfg80211_registered_device *drv;
3356 struct net_device *dev;
3357 int err;
3358
3359 rtnl_lock();
3360
3361 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3362 if (err)
3363 goto unlock_rtnl;
3364
3365 if (!drv->ops->leave_ibss) {
3366 err = -EOPNOTSUPP;
3367 goto out;
3368 }
3369
3370 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3371 err = -EOPNOTSUPP;
3372 goto out;
3373 }
3374
3375 if (!netif_running(dev)) {
3376 err = -ENETDOWN;
3377 goto out;
3378 }
3379
3380 err = cfg80211_leave_ibss(drv, dev, false);
3381
3382 out:
3383 cfg80211_put_dev(drv);
3384 dev_put(dev);
3385 unlock_rtnl:
3386 rtnl_unlock();
3387 return err;
3388 }
3389
3390 static struct genl_ops nl80211_ops[] = {
3391 {
3392 .cmd = NL80211_CMD_GET_WIPHY,
3393 .doit = nl80211_get_wiphy,
3394 .dumpit = nl80211_dump_wiphy,
3395 .policy = nl80211_policy,
3396 /* can be retrieved by unprivileged users */
3397 },
3398 {
3399 .cmd = NL80211_CMD_SET_WIPHY,
3400 .doit = nl80211_set_wiphy,
3401 .policy = nl80211_policy,
3402 .flags = GENL_ADMIN_PERM,
3403 },
3404 {
3405 .cmd = NL80211_CMD_GET_INTERFACE,
3406 .doit = nl80211_get_interface,
3407 .dumpit = nl80211_dump_interface,
3408 .policy = nl80211_policy,
3409 /* can be retrieved by unprivileged users */
3410 },
3411 {
3412 .cmd = NL80211_CMD_SET_INTERFACE,
3413 .doit = nl80211_set_interface,
3414 .policy = nl80211_policy,
3415 .flags = GENL_ADMIN_PERM,
3416 },
3417 {
3418 .cmd = NL80211_CMD_NEW_INTERFACE,
3419 .doit = nl80211_new_interface,
3420 .policy = nl80211_policy,
3421 .flags = GENL_ADMIN_PERM,
3422 },
3423 {
3424 .cmd = NL80211_CMD_DEL_INTERFACE,
3425 .doit = nl80211_del_interface,
3426 .policy = nl80211_policy,
3427 .flags = GENL_ADMIN_PERM,
3428 },
3429 {
3430 .cmd = NL80211_CMD_GET_KEY,
3431 .doit = nl80211_get_key,
3432 .policy = nl80211_policy,
3433 .flags = GENL_ADMIN_PERM,
3434 },
3435 {
3436 .cmd = NL80211_CMD_SET_KEY,
3437 .doit = nl80211_set_key,
3438 .policy = nl80211_policy,
3439 .flags = GENL_ADMIN_PERM,
3440 },
3441 {
3442 .cmd = NL80211_CMD_NEW_KEY,
3443 .doit = nl80211_new_key,
3444 .policy = nl80211_policy,
3445 .flags = GENL_ADMIN_PERM,
3446 },
3447 {
3448 .cmd = NL80211_CMD_DEL_KEY,
3449 .doit = nl80211_del_key,
3450 .policy = nl80211_policy,
3451 .flags = GENL_ADMIN_PERM,
3452 },
3453 {
3454 .cmd = NL80211_CMD_SET_BEACON,
3455 .policy = nl80211_policy,
3456 .flags = GENL_ADMIN_PERM,
3457 .doit = nl80211_addset_beacon,
3458 },
3459 {
3460 .cmd = NL80211_CMD_NEW_BEACON,
3461 .policy = nl80211_policy,
3462 .flags = GENL_ADMIN_PERM,
3463 .doit = nl80211_addset_beacon,
3464 },
3465 {
3466 .cmd = NL80211_CMD_DEL_BEACON,
3467 .policy = nl80211_policy,
3468 .flags = GENL_ADMIN_PERM,
3469 .doit = nl80211_del_beacon,
3470 },
3471 {
3472 .cmd = NL80211_CMD_GET_STATION,
3473 .doit = nl80211_get_station,
3474 .dumpit = nl80211_dump_station,
3475 .policy = nl80211_policy,
3476 },
3477 {
3478 .cmd = NL80211_CMD_SET_STATION,
3479 .doit = nl80211_set_station,
3480 .policy = nl80211_policy,
3481 .flags = GENL_ADMIN_PERM,
3482 },
3483 {
3484 .cmd = NL80211_CMD_NEW_STATION,
3485 .doit = nl80211_new_station,
3486 .policy = nl80211_policy,
3487 .flags = GENL_ADMIN_PERM,
3488 },
3489 {
3490 .cmd = NL80211_CMD_DEL_STATION,
3491 .doit = nl80211_del_station,
3492 .policy = nl80211_policy,
3493 .flags = GENL_ADMIN_PERM,
3494 },
3495 {
3496 .cmd = NL80211_CMD_GET_MPATH,
3497 .doit = nl80211_get_mpath,
3498 .dumpit = nl80211_dump_mpath,
3499 .policy = nl80211_policy,
3500 .flags = GENL_ADMIN_PERM,
3501 },
3502 {
3503 .cmd = NL80211_CMD_SET_MPATH,
3504 .doit = nl80211_set_mpath,
3505 .policy = nl80211_policy,
3506 .flags = GENL_ADMIN_PERM,
3507 },
3508 {
3509 .cmd = NL80211_CMD_NEW_MPATH,
3510 .doit = nl80211_new_mpath,
3511 .policy = nl80211_policy,
3512 .flags = GENL_ADMIN_PERM,
3513 },
3514 {
3515 .cmd = NL80211_CMD_DEL_MPATH,
3516 .doit = nl80211_del_mpath,
3517 .policy = nl80211_policy,
3518 .flags = GENL_ADMIN_PERM,
3519 },
3520 {
3521 .cmd = NL80211_CMD_SET_BSS,
3522 .doit = nl80211_set_bss,
3523 .policy = nl80211_policy,
3524 .flags = GENL_ADMIN_PERM,
3525 },
3526 {
3527 .cmd = NL80211_CMD_GET_REG,
3528 .doit = nl80211_get_reg,
3529 .policy = nl80211_policy,
3530 /* can be retrieved by unprivileged users */
3531 },
3532 {
3533 .cmd = NL80211_CMD_SET_REG,
3534 .doit = nl80211_set_reg,
3535 .policy = nl80211_policy,
3536 .flags = GENL_ADMIN_PERM,
3537 },
3538 {
3539 .cmd = NL80211_CMD_REQ_SET_REG,
3540 .doit = nl80211_req_set_reg,
3541 .policy = nl80211_policy,
3542 .flags = GENL_ADMIN_PERM,
3543 },
3544 {
3545 .cmd = NL80211_CMD_GET_MESH_PARAMS,
3546 .doit = nl80211_get_mesh_params,
3547 .policy = nl80211_policy,
3548 /* can be retrieved by unprivileged users */
3549 },
3550 {
3551 .cmd = NL80211_CMD_SET_MESH_PARAMS,
3552 .doit = nl80211_set_mesh_params,
3553 .policy = nl80211_policy,
3554 .flags = GENL_ADMIN_PERM,
3555 },
3556 {
3557 .cmd = NL80211_CMD_TRIGGER_SCAN,
3558 .doit = nl80211_trigger_scan,
3559 .policy = nl80211_policy,
3560 .flags = GENL_ADMIN_PERM,
3561 },
3562 {
3563 .cmd = NL80211_CMD_GET_SCAN,
3564 .policy = nl80211_policy,
3565 .dumpit = nl80211_dump_scan,
3566 },
3567 {
3568 .cmd = NL80211_CMD_AUTHENTICATE,
3569 .doit = nl80211_authenticate,
3570 .policy = nl80211_policy,
3571 .flags = GENL_ADMIN_PERM,
3572 },
3573 {
3574 .cmd = NL80211_CMD_ASSOCIATE,
3575 .doit = nl80211_associate,
3576 .policy = nl80211_policy,
3577 .flags = GENL_ADMIN_PERM,
3578 },
3579 {
3580 .cmd = NL80211_CMD_DEAUTHENTICATE,
3581 .doit = nl80211_deauthenticate,
3582 .policy = nl80211_policy,
3583 .flags = GENL_ADMIN_PERM,
3584 },
3585 {
3586 .cmd = NL80211_CMD_DISASSOCIATE,
3587 .doit = nl80211_disassociate,
3588 .policy = nl80211_policy,
3589 .flags = GENL_ADMIN_PERM,
3590 },
3591 {
3592 .cmd = NL80211_CMD_JOIN_IBSS,
3593 .doit = nl80211_join_ibss,
3594 .policy = nl80211_policy,
3595 .flags = GENL_ADMIN_PERM,
3596 },
3597 {
3598 .cmd = NL80211_CMD_LEAVE_IBSS,
3599 .doit = nl80211_leave_ibss,
3600 .policy = nl80211_policy,
3601 .flags = GENL_ADMIN_PERM,
3602 },
3603 };
3604 static struct genl_multicast_group nl80211_mlme_mcgrp = {
3605 .name = "mlme",
3606 };
3607
3608 /* multicast groups */
3609 static struct genl_multicast_group nl80211_config_mcgrp = {
3610 .name = "config",
3611 };
3612 static struct genl_multicast_group nl80211_scan_mcgrp = {
3613 .name = "scan",
3614 };
3615 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
3616 .name = "regulatory",
3617 };
3618
3619 /* notification functions */
3620
3621 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
3622 {
3623 struct sk_buff *msg;
3624
3625 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3626 if (!msg)
3627 return;
3628
3629 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
3630 nlmsg_free(msg);
3631 return;
3632 }
3633
3634 genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
3635 }
3636
3637 static int nl80211_add_scan_req(struct sk_buff *msg,
3638 struct cfg80211_registered_device *rdev)
3639 {
3640 struct cfg80211_scan_request *req = rdev->scan_req;
3641 struct nlattr *nest;
3642 int i;
3643
3644 if (WARN_ON(!req))
3645 return 0;
3646
3647 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
3648 if (!nest)
3649 goto nla_put_failure;
3650 for (i = 0; i < req->n_ssids; i++)
3651 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
3652 nla_nest_end(msg, nest);
3653
3654 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
3655 if (!nest)
3656 goto nla_put_failure;
3657 for (i = 0; i < req->n_channels; i++)
3658 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
3659 nla_nest_end(msg, nest);
3660
3661 if (req->ie)
3662 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
3663
3664 return 0;
3665 nla_put_failure:
3666 return -ENOBUFS;
3667 }
3668
3669 static int nl80211_send_scan_donemsg(struct sk_buff *msg,
3670 struct cfg80211_registered_device *rdev,
3671 struct net_device *netdev,
3672 u32 pid, u32 seq, int flags,
3673 u32 cmd)
3674 {
3675 void *hdr;
3676
3677 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
3678 if (!hdr)
3679 return -1;
3680
3681 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3682 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3683
3684 /* ignore errors and send incomplete event anyway */
3685 nl80211_add_scan_req(msg, rdev);
3686
3687 return genlmsg_end(msg, hdr);
3688
3689 nla_put_failure:
3690 genlmsg_cancel(msg, hdr);
3691 return -EMSGSIZE;
3692 }
3693
3694 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
3695 struct net_device *netdev)
3696 {
3697 struct sk_buff *msg;
3698
3699 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3700 if (!msg)
3701 return;
3702
3703 if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3704 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
3705 nlmsg_free(msg);
3706 return;
3707 }
3708
3709 genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3710 }
3711
3712 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
3713 struct net_device *netdev)
3714 {
3715 struct sk_buff *msg;
3716
3717 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3718 if (!msg)
3719 return;
3720
3721 if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3722 NL80211_CMD_SCAN_ABORTED) < 0) {
3723 nlmsg_free(msg);
3724 return;
3725 }
3726
3727 genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3728 }
3729
3730 /*
3731 * This can happen on global regulatory changes or device specific settings
3732 * based on custom world regulatory domains.
3733 */
3734 void nl80211_send_reg_change_event(struct regulatory_request *request)
3735 {
3736 struct sk_buff *msg;
3737 void *hdr;
3738
3739 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3740 if (!msg)
3741 return;
3742
3743 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
3744 if (!hdr) {
3745 nlmsg_free(msg);
3746 return;
3747 }
3748
3749 /* Userspace can always count this one always being set */
3750 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
3751
3752 if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
3753 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3754 NL80211_REGDOM_TYPE_WORLD);
3755 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
3756 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3757 NL80211_REGDOM_TYPE_CUSTOM_WORLD);
3758 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
3759 request->intersect)
3760 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3761 NL80211_REGDOM_TYPE_INTERSECTION);
3762 else {
3763 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3764 NL80211_REGDOM_TYPE_COUNTRY);
3765 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
3766 }
3767
3768 if (wiphy_idx_valid(request->wiphy_idx))
3769 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
3770
3771 if (genlmsg_end(msg, hdr) < 0) {
3772 nlmsg_free(msg);
3773 return;
3774 }
3775
3776 genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_KERNEL);
3777
3778 return;
3779
3780 nla_put_failure:
3781 genlmsg_cancel(msg, hdr);
3782 nlmsg_free(msg);
3783 }
3784
3785 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
3786 struct net_device *netdev,
3787 const u8 *buf, size_t len,
3788 enum nl80211_commands cmd)
3789 {
3790 struct sk_buff *msg;
3791 void *hdr;
3792
3793 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3794 if (!msg)
3795 return;
3796
3797 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3798 if (!hdr) {
3799 nlmsg_free(msg);
3800 return;
3801 }
3802
3803 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3804 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3805 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
3806
3807 if (genlmsg_end(msg, hdr) < 0) {
3808 nlmsg_free(msg);
3809 return;
3810 }
3811
3812 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3813 return;
3814
3815 nla_put_failure:
3816 genlmsg_cancel(msg, hdr);
3817 nlmsg_free(msg);
3818 }
3819
3820 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
3821 struct net_device *netdev, const u8 *buf, size_t len)
3822 {
3823 nl80211_send_mlme_event(rdev, netdev, buf, len,
3824 NL80211_CMD_AUTHENTICATE);
3825 }
3826
3827 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
3828 struct net_device *netdev, const u8 *buf,
3829 size_t len)
3830 {
3831 nl80211_send_mlme_event(rdev, netdev, buf, len, NL80211_CMD_ASSOCIATE);
3832 }
3833
3834 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
3835 struct net_device *netdev, const u8 *buf, size_t len)
3836 {
3837 nl80211_send_mlme_event(rdev, netdev, buf, len,
3838 NL80211_CMD_DEAUTHENTICATE);
3839 }
3840
3841 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
3842 struct net_device *netdev, const u8 *buf,
3843 size_t len)
3844 {
3845 nl80211_send_mlme_event(rdev, netdev, buf, len,
3846 NL80211_CMD_DISASSOCIATE);
3847 }
3848
3849 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
3850 struct net_device *netdev, int cmd,
3851 const u8 *addr)
3852 {
3853 struct sk_buff *msg;
3854 void *hdr;
3855
3856 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3857 if (!msg)
3858 return;
3859
3860 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3861 if (!hdr) {
3862 nlmsg_free(msg);
3863 return;
3864 }
3865
3866 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3867 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3868 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
3869 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3870
3871 if (genlmsg_end(msg, hdr) < 0) {
3872 nlmsg_free(msg);
3873 return;
3874 }
3875
3876 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3877 return;
3878
3879 nla_put_failure:
3880 genlmsg_cancel(msg, hdr);
3881 nlmsg_free(msg);
3882 }
3883
3884 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
3885 struct net_device *netdev, const u8 *addr)
3886 {
3887 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
3888 addr);
3889 }
3890
3891 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
3892 struct net_device *netdev, const u8 *addr)
3893 {
3894 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE, addr);
3895 }
3896
3897 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
3898 struct net_device *netdev, const u8 *bssid,
3899 gfp_t gfp)
3900 {
3901 struct sk_buff *msg;
3902 void *hdr;
3903
3904 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
3905 if (!msg)
3906 return;
3907
3908 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
3909 if (!hdr) {
3910 nlmsg_free(msg);
3911 return;
3912 }
3913
3914 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3915 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3916 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
3917
3918 if (genlmsg_end(msg, hdr) < 0) {
3919 nlmsg_free(msg);
3920 return;
3921 }
3922
3923 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
3924 return;
3925
3926 nla_put_failure:
3927 genlmsg_cancel(msg, hdr);
3928 nlmsg_free(msg);
3929 }
3930
3931 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
3932 struct net_device *netdev, const u8 *addr,
3933 enum nl80211_key_type key_type, int key_id,
3934 const u8 *tsc)
3935 {
3936 struct sk_buff *msg;
3937 void *hdr;
3938
3939 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3940 if (!msg)
3941 return;
3942
3943 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
3944 if (!hdr) {
3945 nlmsg_free(msg);
3946 return;
3947 }
3948
3949 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3950 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3951 if (addr)
3952 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3953 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
3954 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
3955 if (tsc)
3956 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
3957
3958 if (genlmsg_end(msg, hdr) < 0) {
3959 nlmsg_free(msg);
3960 return;
3961 }
3962
3963 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3964 return;
3965
3966 nla_put_failure:
3967 genlmsg_cancel(msg, hdr);
3968 nlmsg_free(msg);
3969 }
3970
3971 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
3972 struct ieee80211_channel *channel_before,
3973 struct ieee80211_channel *channel_after)
3974 {
3975 struct sk_buff *msg;
3976 void *hdr;
3977 struct nlattr *nl_freq;
3978
3979 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3980 if (!msg)
3981 return;
3982
3983 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
3984 if (!hdr) {
3985 nlmsg_free(msg);
3986 return;
3987 }
3988
3989 /*
3990 * Since we are applying the beacon hint to a wiphy we know its
3991 * wiphy_idx is valid
3992 */
3993 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
3994
3995 /* Before */
3996 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
3997 if (!nl_freq)
3998 goto nla_put_failure;
3999 if (nl80211_msg_put_channel(msg, channel_before))
4000 goto nla_put_failure;
4001 nla_nest_end(msg, nl_freq);
4002
4003 /* After */
4004 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
4005 if (!nl_freq)
4006 goto nla_put_failure;
4007 if (nl80211_msg_put_channel(msg, channel_after))
4008 goto nla_put_failure;
4009 nla_nest_end(msg, nl_freq);
4010
4011 if (genlmsg_end(msg, hdr) < 0) {
4012 nlmsg_free(msg);
4013 return;
4014 }
4015
4016 genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_ATOMIC);
4017
4018 return;
4019
4020 nla_put_failure:
4021 genlmsg_cancel(msg, hdr);
4022 nlmsg_free(msg);
4023 }
4024
4025 /* initialisation/exit functions */
4026
4027 int nl80211_init(void)
4028 {
4029 int err;
4030
4031 err = genl_register_family_with_ops(&nl80211_fam,
4032 nl80211_ops, ARRAY_SIZE(nl80211_ops));
4033 if (err)
4034 return err;
4035
4036 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
4037 if (err)
4038 goto err_out;
4039
4040 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
4041 if (err)
4042 goto err_out;
4043
4044 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
4045 if (err)
4046 goto err_out;
4047
4048 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
4049 if (err)
4050 goto err_out;
4051
4052 return 0;
4053 err_out:
4054 genl_unregister_family(&nl80211_fam);
4055 return err;
4056 }
4057
4058 void nl80211_exit(void)
4059 {
4060 genl_unregister_family(&nl80211_fam);
4061 }