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nl80211: Validate NL80211_ATTR_KEY_SEQ length
[deliverable/linux.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 = BUS_ID_SIZE-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 if (!drv->ops->change_station) {
1695 err = -EOPNOTSUPP;
1696 goto out;
1697 }
1698
1699 err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1700
1701 out:
1702 if (params.vlan)
1703 dev_put(params.vlan);
1704 cfg80211_put_dev(drv);
1705 dev_put(dev);
1706 out_rtnl:
1707 rtnl_unlock();
1708
1709 return err;
1710 }
1711
1712 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1713 {
1714 struct cfg80211_registered_device *drv;
1715 int err;
1716 struct net_device *dev;
1717 struct station_parameters params;
1718 u8 *mac_addr = NULL;
1719
1720 memset(&params, 0, sizeof(params));
1721
1722 if (!info->attrs[NL80211_ATTR_MAC])
1723 return -EINVAL;
1724
1725 if (!info->attrs[NL80211_ATTR_STA_AID])
1726 return -EINVAL;
1727
1728 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1729 return -EINVAL;
1730
1731 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1732 return -EINVAL;
1733
1734 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1735 params.supported_rates =
1736 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1737 params.supported_rates_len =
1738 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1739 params.listen_interval =
1740 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1741 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1742 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1743 params.ht_capa =
1744 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1745
1746 if (parse_station_flags(info, &params))
1747 return -EINVAL;
1748
1749 rtnl_lock();
1750
1751 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1752 if (err)
1753 goto out_rtnl;
1754
1755 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1756 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
1757 err = -EINVAL;
1758 goto out;
1759 }
1760
1761 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1762 if (err)
1763 goto out;
1764
1765 if (!drv->ops->add_station) {
1766 err = -EOPNOTSUPP;
1767 goto out;
1768 }
1769
1770 if (!netif_running(dev)) {
1771 err = -ENETDOWN;
1772 goto out;
1773 }
1774
1775 err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1776
1777 out:
1778 if (params.vlan)
1779 dev_put(params.vlan);
1780 cfg80211_put_dev(drv);
1781 dev_put(dev);
1782 out_rtnl:
1783 rtnl_unlock();
1784
1785 return err;
1786 }
1787
1788 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1789 {
1790 struct cfg80211_registered_device *drv;
1791 int err;
1792 struct net_device *dev;
1793 u8 *mac_addr = NULL;
1794
1795 if (info->attrs[NL80211_ATTR_MAC])
1796 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1797
1798 rtnl_lock();
1799
1800 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1801 if (err)
1802 goto out_rtnl;
1803
1804 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1805 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
1806 err = -EINVAL;
1807 goto out;
1808 }
1809
1810 if (!drv->ops->del_station) {
1811 err = -EOPNOTSUPP;
1812 goto out;
1813 }
1814
1815 err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1816
1817 out:
1818 cfg80211_put_dev(drv);
1819 dev_put(dev);
1820 out_rtnl:
1821 rtnl_unlock();
1822
1823 return err;
1824 }
1825
1826 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1827 int flags, struct net_device *dev,
1828 u8 *dst, u8 *next_hop,
1829 struct mpath_info *pinfo)
1830 {
1831 void *hdr;
1832 struct nlattr *pinfoattr;
1833
1834 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1835 if (!hdr)
1836 return -1;
1837
1838 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1839 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1840 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1841
1842 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1843 if (!pinfoattr)
1844 goto nla_put_failure;
1845 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1846 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1847 pinfo->frame_qlen);
1848 if (pinfo->filled & MPATH_INFO_DSN)
1849 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1850 pinfo->dsn);
1851 if (pinfo->filled & MPATH_INFO_METRIC)
1852 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1853 pinfo->metric);
1854 if (pinfo->filled & MPATH_INFO_EXPTIME)
1855 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1856 pinfo->exptime);
1857 if (pinfo->filled & MPATH_INFO_FLAGS)
1858 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1859 pinfo->flags);
1860 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1861 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1862 pinfo->discovery_timeout);
1863 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1864 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1865 pinfo->discovery_retries);
1866
1867 nla_nest_end(msg, pinfoattr);
1868
1869 return genlmsg_end(msg, hdr);
1870
1871 nla_put_failure:
1872 genlmsg_cancel(msg, hdr);
1873 return -EMSGSIZE;
1874 }
1875
1876 static int nl80211_dump_mpath(struct sk_buff *skb,
1877 struct netlink_callback *cb)
1878 {
1879 struct mpath_info pinfo;
1880 struct cfg80211_registered_device *dev;
1881 struct net_device *netdev;
1882 u8 dst[ETH_ALEN];
1883 u8 next_hop[ETH_ALEN];
1884 int ifidx = cb->args[0];
1885 int path_idx = cb->args[1];
1886 int err;
1887
1888 if (!ifidx) {
1889 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1890 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1891 nl80211_policy);
1892 if (err)
1893 return err;
1894
1895 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1896 return -EINVAL;
1897
1898 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1899 if (!ifidx)
1900 return -EINVAL;
1901 }
1902
1903 rtnl_lock();
1904
1905 netdev = __dev_get_by_index(&init_net, ifidx);
1906 if (!netdev) {
1907 err = -ENODEV;
1908 goto out_rtnl;
1909 }
1910
1911 dev = cfg80211_get_dev_from_ifindex(ifidx);
1912 if (IS_ERR(dev)) {
1913 err = PTR_ERR(dev);
1914 goto out_rtnl;
1915 }
1916
1917 if (!dev->ops->dump_mpath) {
1918 err = -EOPNOTSUPP;
1919 goto out_err;
1920 }
1921
1922 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1923 err = -EOPNOTSUPP;
1924 goto out;
1925 }
1926
1927 while (1) {
1928 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1929 dst, next_hop, &pinfo);
1930 if (err == -ENOENT)
1931 break;
1932 if (err)
1933 goto out_err;
1934
1935 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1936 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1937 netdev, dst, next_hop,
1938 &pinfo) < 0)
1939 goto out;
1940
1941 path_idx++;
1942 }
1943
1944
1945 out:
1946 cb->args[1] = path_idx;
1947 err = skb->len;
1948 out_err:
1949 cfg80211_put_dev(dev);
1950 out_rtnl:
1951 rtnl_unlock();
1952
1953 return err;
1954 }
1955
1956 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1957 {
1958 struct cfg80211_registered_device *drv;
1959 int err;
1960 struct net_device *dev;
1961 struct mpath_info pinfo;
1962 struct sk_buff *msg;
1963 u8 *dst = NULL;
1964 u8 next_hop[ETH_ALEN];
1965
1966 memset(&pinfo, 0, sizeof(pinfo));
1967
1968 if (!info->attrs[NL80211_ATTR_MAC])
1969 return -EINVAL;
1970
1971 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1972
1973 rtnl_lock();
1974
1975 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1976 if (err)
1977 goto out_rtnl;
1978
1979 if (!drv->ops->get_mpath) {
1980 err = -EOPNOTSUPP;
1981 goto out;
1982 }
1983
1984 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1985 err = -EOPNOTSUPP;
1986 goto out;
1987 }
1988
1989 err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1990 if (err)
1991 goto out;
1992
1993 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1994 if (!msg)
1995 goto out;
1996
1997 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1998 dev, dst, next_hop, &pinfo) < 0)
1999 goto out_free;
2000
2001 err = genlmsg_unicast(msg, info->snd_pid);
2002 goto out;
2003
2004 out_free:
2005 nlmsg_free(msg);
2006 out:
2007 cfg80211_put_dev(drv);
2008 dev_put(dev);
2009 out_rtnl:
2010 rtnl_unlock();
2011
2012 return err;
2013 }
2014
2015 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2016 {
2017 struct cfg80211_registered_device *drv;
2018 int err;
2019 struct net_device *dev;
2020 u8 *dst = NULL;
2021 u8 *next_hop = NULL;
2022
2023 if (!info->attrs[NL80211_ATTR_MAC])
2024 return -EINVAL;
2025
2026 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2027 return -EINVAL;
2028
2029 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2030 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2031
2032 rtnl_lock();
2033
2034 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2035 if (err)
2036 goto out_rtnl;
2037
2038 if (!drv->ops->change_mpath) {
2039 err = -EOPNOTSUPP;
2040 goto out;
2041 }
2042
2043 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2044 err = -EOPNOTSUPP;
2045 goto out;
2046 }
2047
2048 if (!netif_running(dev)) {
2049 err = -ENETDOWN;
2050 goto out;
2051 }
2052
2053 err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
2054
2055 out:
2056 cfg80211_put_dev(drv);
2057 dev_put(dev);
2058 out_rtnl:
2059 rtnl_unlock();
2060
2061 return err;
2062 }
2063 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2064 {
2065 struct cfg80211_registered_device *drv;
2066 int err;
2067 struct net_device *dev;
2068 u8 *dst = NULL;
2069 u8 *next_hop = NULL;
2070
2071 if (!info->attrs[NL80211_ATTR_MAC])
2072 return -EINVAL;
2073
2074 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2075 return -EINVAL;
2076
2077 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2078 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2079
2080 rtnl_lock();
2081
2082 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2083 if (err)
2084 goto out_rtnl;
2085
2086 if (!drv->ops->add_mpath) {
2087 err = -EOPNOTSUPP;
2088 goto out;
2089 }
2090
2091 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2092 err = -EOPNOTSUPP;
2093 goto out;
2094 }
2095
2096 if (!netif_running(dev)) {
2097 err = -ENETDOWN;
2098 goto out;
2099 }
2100
2101 err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
2102
2103 out:
2104 cfg80211_put_dev(drv);
2105 dev_put(dev);
2106 out_rtnl:
2107 rtnl_unlock();
2108
2109 return err;
2110 }
2111
2112 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2113 {
2114 struct cfg80211_registered_device *drv;
2115 int err;
2116 struct net_device *dev;
2117 u8 *dst = NULL;
2118
2119 if (info->attrs[NL80211_ATTR_MAC])
2120 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2121
2122 rtnl_lock();
2123
2124 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2125 if (err)
2126 goto out_rtnl;
2127
2128 if (!drv->ops->del_mpath) {
2129 err = -EOPNOTSUPP;
2130 goto out;
2131 }
2132
2133 err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
2134
2135 out:
2136 cfg80211_put_dev(drv);
2137 dev_put(dev);
2138 out_rtnl:
2139 rtnl_unlock();
2140
2141 return err;
2142 }
2143
2144 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2145 {
2146 struct cfg80211_registered_device *drv;
2147 int err;
2148 struct net_device *dev;
2149 struct bss_parameters params;
2150
2151 memset(&params, 0, sizeof(params));
2152 /* default to not changing parameters */
2153 params.use_cts_prot = -1;
2154 params.use_short_preamble = -1;
2155 params.use_short_slot_time = -1;
2156
2157 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2158 params.use_cts_prot =
2159 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2160 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2161 params.use_short_preamble =
2162 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2163 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2164 params.use_short_slot_time =
2165 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2166 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2167 params.basic_rates =
2168 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2169 params.basic_rates_len =
2170 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2171 }
2172
2173 rtnl_lock();
2174
2175 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2176 if (err)
2177 goto out_rtnl;
2178
2179 if (!drv->ops->change_bss) {
2180 err = -EOPNOTSUPP;
2181 goto out;
2182 }
2183
2184 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2185 err = -EOPNOTSUPP;
2186 goto out;
2187 }
2188
2189 err = drv->ops->change_bss(&drv->wiphy, dev, &params);
2190
2191 out:
2192 cfg80211_put_dev(drv);
2193 dev_put(dev);
2194 out_rtnl:
2195 rtnl_unlock();
2196
2197 return err;
2198 }
2199
2200 static const struct nla_policy
2201 reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2202 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
2203 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
2204 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
2205 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
2206 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
2207 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
2208 };
2209
2210 static int parse_reg_rule(struct nlattr *tb[],
2211 struct ieee80211_reg_rule *reg_rule)
2212 {
2213 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2214 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2215
2216 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2217 return -EINVAL;
2218 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2219 return -EINVAL;
2220 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2221 return -EINVAL;
2222 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2223 return -EINVAL;
2224 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2225 return -EINVAL;
2226
2227 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2228
2229 freq_range->start_freq_khz =
2230 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2231 freq_range->end_freq_khz =
2232 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2233 freq_range->max_bandwidth_khz =
2234 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2235
2236 power_rule->max_eirp =
2237 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2238
2239 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2240 power_rule->max_antenna_gain =
2241 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2242
2243 return 0;
2244 }
2245
2246 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2247 {
2248 int r;
2249 char *data = NULL;
2250
2251 /*
2252 * You should only get this when cfg80211 hasn't yet initialized
2253 * completely when built-in to the kernel right between the time
2254 * window between nl80211_init() and regulatory_init(), if that is
2255 * even possible.
2256 */
2257 mutex_lock(&cfg80211_mutex);
2258 if (unlikely(!cfg80211_regdomain)) {
2259 mutex_unlock(&cfg80211_mutex);
2260 return -EINPROGRESS;
2261 }
2262 mutex_unlock(&cfg80211_mutex);
2263
2264 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2265 return -EINVAL;
2266
2267 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2268
2269 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2270 /* We ignore world regdom requests with the old regdom setup */
2271 if (is_world_regdom(data))
2272 return -EINVAL;
2273 #endif
2274
2275 r = regulatory_hint_user(data);
2276
2277 return r;
2278 }
2279
2280 static int nl80211_get_mesh_params(struct sk_buff *skb,
2281 struct genl_info *info)
2282 {
2283 struct cfg80211_registered_device *drv;
2284 struct mesh_config cur_params;
2285 int err;
2286 struct net_device *dev;
2287 void *hdr;
2288 struct nlattr *pinfoattr;
2289 struct sk_buff *msg;
2290
2291 rtnl_lock();
2292
2293 /* Look up our device */
2294 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2295 if (err)
2296 goto out_rtnl;
2297
2298 if (!drv->ops->get_mesh_params) {
2299 err = -EOPNOTSUPP;
2300 goto out;
2301 }
2302
2303 /* Get the mesh params */
2304 err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params);
2305 if (err)
2306 goto out;
2307
2308 /* Draw up a netlink message to send back */
2309 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2310 if (!msg) {
2311 err = -ENOBUFS;
2312 goto out;
2313 }
2314 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2315 NL80211_CMD_GET_MESH_PARAMS);
2316 if (!hdr)
2317 goto nla_put_failure;
2318 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2319 if (!pinfoattr)
2320 goto nla_put_failure;
2321 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2322 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2323 cur_params.dot11MeshRetryTimeout);
2324 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2325 cur_params.dot11MeshConfirmTimeout);
2326 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2327 cur_params.dot11MeshHoldingTimeout);
2328 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2329 cur_params.dot11MeshMaxPeerLinks);
2330 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2331 cur_params.dot11MeshMaxRetries);
2332 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2333 cur_params.dot11MeshTTL);
2334 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2335 cur_params.auto_open_plinks);
2336 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2337 cur_params.dot11MeshHWMPmaxPREQretries);
2338 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2339 cur_params.path_refresh_time);
2340 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2341 cur_params.min_discovery_timeout);
2342 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2343 cur_params.dot11MeshHWMPactivePathTimeout);
2344 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2345 cur_params.dot11MeshHWMPpreqMinInterval);
2346 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2347 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2348 nla_nest_end(msg, pinfoattr);
2349 genlmsg_end(msg, hdr);
2350 err = genlmsg_unicast(msg, info->snd_pid);
2351 goto out;
2352
2353 nla_put_failure:
2354 genlmsg_cancel(msg, hdr);
2355 err = -EMSGSIZE;
2356 out:
2357 /* Cleanup */
2358 cfg80211_put_dev(drv);
2359 dev_put(dev);
2360 out_rtnl:
2361 rtnl_unlock();
2362
2363 return err;
2364 }
2365
2366 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2367 do {\
2368 if (table[attr_num]) {\
2369 cfg.param = nla_fn(table[attr_num]); \
2370 mask |= (1 << (attr_num - 1)); \
2371 } \
2372 } while (0);\
2373
2374 static struct nla_policy
2375 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2376 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2377 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2378 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2379 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2380 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2381 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2382 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2383
2384 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2385 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2386 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2387 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2388 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2389 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2390 };
2391
2392 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2393 {
2394 int err;
2395 u32 mask;
2396 struct cfg80211_registered_device *drv;
2397 struct net_device *dev;
2398 struct mesh_config cfg;
2399 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2400 struct nlattr *parent_attr;
2401
2402 parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2403 if (!parent_attr)
2404 return -EINVAL;
2405 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2406 parent_attr, nl80211_meshconf_params_policy))
2407 return -EINVAL;
2408
2409 rtnl_lock();
2410
2411 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2412 if (err)
2413 goto out_rtnl;
2414
2415 if (!drv->ops->set_mesh_params) {
2416 err = -EOPNOTSUPP;
2417 goto out;
2418 }
2419
2420 /* This makes sure that there aren't more than 32 mesh config
2421 * parameters (otherwise our bitfield scheme would not work.) */
2422 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2423
2424 /* Fill in the params struct */
2425 mask = 0;
2426 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2427 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2428 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2429 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2430 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2431 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2432 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2433 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2434 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2435 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2436 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2437 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2438 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2439 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2440 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2441 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2442 nla_get_u8);
2443 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2444 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2445 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2446 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2447 nla_get_u16);
2448 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2449 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2450 nla_get_u32);
2451 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2452 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2453 nla_get_u16);
2454 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2455 dot11MeshHWMPnetDiameterTraversalTime,
2456 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2457 nla_get_u16);
2458
2459 /* Apply changes */
2460 err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask);
2461
2462 out:
2463 /* cleanup */
2464 cfg80211_put_dev(drv);
2465 dev_put(dev);
2466 out_rtnl:
2467 rtnl_unlock();
2468
2469 return err;
2470 }
2471
2472 #undef FILL_IN_MESH_PARAM_IF_SET
2473
2474 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2475 {
2476 struct sk_buff *msg;
2477 void *hdr = NULL;
2478 struct nlattr *nl_reg_rules;
2479 unsigned int i;
2480 int err = -EINVAL;
2481
2482 mutex_lock(&cfg80211_mutex);
2483
2484 if (!cfg80211_regdomain)
2485 goto out;
2486
2487 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2488 if (!msg) {
2489 err = -ENOBUFS;
2490 goto out;
2491 }
2492
2493 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2494 NL80211_CMD_GET_REG);
2495 if (!hdr)
2496 goto nla_put_failure;
2497
2498 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2499 cfg80211_regdomain->alpha2);
2500
2501 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2502 if (!nl_reg_rules)
2503 goto nla_put_failure;
2504
2505 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2506 struct nlattr *nl_reg_rule;
2507 const struct ieee80211_reg_rule *reg_rule;
2508 const struct ieee80211_freq_range *freq_range;
2509 const struct ieee80211_power_rule *power_rule;
2510
2511 reg_rule = &cfg80211_regdomain->reg_rules[i];
2512 freq_range = &reg_rule->freq_range;
2513 power_rule = &reg_rule->power_rule;
2514
2515 nl_reg_rule = nla_nest_start(msg, i);
2516 if (!nl_reg_rule)
2517 goto nla_put_failure;
2518
2519 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2520 reg_rule->flags);
2521 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2522 freq_range->start_freq_khz);
2523 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2524 freq_range->end_freq_khz);
2525 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2526 freq_range->max_bandwidth_khz);
2527 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2528 power_rule->max_antenna_gain);
2529 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2530 power_rule->max_eirp);
2531
2532 nla_nest_end(msg, nl_reg_rule);
2533 }
2534
2535 nla_nest_end(msg, nl_reg_rules);
2536
2537 genlmsg_end(msg, hdr);
2538 err = genlmsg_unicast(msg, info->snd_pid);
2539 goto out;
2540
2541 nla_put_failure:
2542 genlmsg_cancel(msg, hdr);
2543 err = -EMSGSIZE;
2544 out:
2545 mutex_unlock(&cfg80211_mutex);
2546 return err;
2547 }
2548
2549 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2550 {
2551 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2552 struct nlattr *nl_reg_rule;
2553 char *alpha2 = NULL;
2554 int rem_reg_rules = 0, r = 0;
2555 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2556 struct ieee80211_regdomain *rd = NULL;
2557
2558 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2559 return -EINVAL;
2560
2561 if (!info->attrs[NL80211_ATTR_REG_RULES])
2562 return -EINVAL;
2563
2564 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2565
2566 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2567 rem_reg_rules) {
2568 num_rules++;
2569 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2570 goto bad_reg;
2571 }
2572
2573 if (!reg_is_valid_request(alpha2))
2574 return -EINVAL;
2575
2576 size_of_regd = sizeof(struct ieee80211_regdomain) +
2577 (num_rules * sizeof(struct ieee80211_reg_rule));
2578
2579 rd = kzalloc(size_of_regd, GFP_KERNEL);
2580 if (!rd)
2581 return -ENOMEM;
2582
2583 rd->n_reg_rules = num_rules;
2584 rd->alpha2[0] = alpha2[0];
2585 rd->alpha2[1] = alpha2[1];
2586
2587 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2588 rem_reg_rules) {
2589 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2590 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2591 reg_rule_policy);
2592 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2593 if (r)
2594 goto bad_reg;
2595
2596 rule_idx++;
2597
2598 if (rule_idx > NL80211_MAX_SUPP_REG_RULES)
2599 goto bad_reg;
2600 }
2601
2602 BUG_ON(rule_idx != num_rules);
2603
2604 mutex_lock(&cfg80211_mutex);
2605 r = set_regdom(rd);
2606 mutex_unlock(&cfg80211_mutex);
2607 return r;
2608
2609 bad_reg:
2610 kfree(rd);
2611 return -EINVAL;
2612 }
2613
2614 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2615 {
2616 struct cfg80211_registered_device *drv;
2617 struct net_device *dev;
2618 struct cfg80211_scan_request *request;
2619 struct cfg80211_ssid *ssid;
2620 struct ieee80211_channel *channel;
2621 struct nlattr *attr;
2622 struct wiphy *wiphy;
2623 int err, tmp, n_ssids = 0, n_channels = 0, i;
2624 enum ieee80211_band band;
2625 size_t ie_len;
2626
2627 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2628 return -EINVAL;
2629
2630 rtnl_lock();
2631
2632 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2633 if (err)
2634 goto out_rtnl;
2635
2636 wiphy = &drv->wiphy;
2637
2638 if (!drv->ops->scan) {
2639 err = -EOPNOTSUPP;
2640 goto out;
2641 }
2642
2643 if (!netif_running(dev)) {
2644 err = -ENETDOWN;
2645 goto out;
2646 }
2647
2648 if (drv->scan_req) {
2649 err = -EBUSY;
2650 goto out;
2651 }
2652
2653 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2654 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp)
2655 n_channels++;
2656 if (!n_channels) {
2657 err = -EINVAL;
2658 goto out;
2659 }
2660 } else {
2661 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2662 if (wiphy->bands[band])
2663 n_channels += wiphy->bands[band]->n_channels;
2664 }
2665
2666 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2667 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2668 n_ssids++;
2669
2670 if (n_ssids > wiphy->max_scan_ssids) {
2671 err = -EINVAL;
2672 goto out;
2673 }
2674
2675 if (info->attrs[NL80211_ATTR_IE])
2676 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2677 else
2678 ie_len = 0;
2679
2680 if (ie_len > wiphy->max_scan_ie_len) {
2681 err = -EINVAL;
2682 goto out;
2683 }
2684
2685 request = kzalloc(sizeof(*request)
2686 + sizeof(*ssid) * n_ssids
2687 + sizeof(channel) * n_channels
2688 + ie_len, GFP_KERNEL);
2689 if (!request) {
2690 err = -ENOMEM;
2691 goto out;
2692 }
2693
2694 request->channels = (void *)((char *)request + sizeof(*request));
2695 request->n_channels = n_channels;
2696 if (n_ssids)
2697 request->ssids = (void *)(request->channels + n_channels);
2698 request->n_ssids = n_ssids;
2699 if (ie_len) {
2700 if (request->ssids)
2701 request->ie = (void *)(request->ssids + n_ssids);
2702 else
2703 request->ie = (void *)(request->channels + n_channels);
2704 }
2705
2706 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2707 /* user specified, bail out if channel not found */
2708 request->n_channels = n_channels;
2709 i = 0;
2710 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2711 request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2712 if (!request->channels[i]) {
2713 err = -EINVAL;
2714 goto out_free;
2715 }
2716 i++;
2717 }
2718 } else {
2719 /* all channels */
2720 i = 0;
2721 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2722 int j;
2723 if (!wiphy->bands[band])
2724 continue;
2725 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2726 request->channels[i] = &wiphy->bands[band]->channels[j];
2727 i++;
2728 }
2729 }
2730 }
2731
2732 i = 0;
2733 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2734 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2735 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2736 err = -EINVAL;
2737 goto out_free;
2738 }
2739 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2740 request->ssids[i].ssid_len = nla_len(attr);
2741 i++;
2742 }
2743 }
2744
2745 if (info->attrs[NL80211_ATTR_IE]) {
2746 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2747 memcpy((void *)request->ie,
2748 nla_data(info->attrs[NL80211_ATTR_IE]),
2749 request->ie_len);
2750 }
2751
2752 request->ifidx = dev->ifindex;
2753 request->wiphy = &drv->wiphy;
2754
2755 drv->scan_req = request;
2756 err = drv->ops->scan(&drv->wiphy, dev, request);
2757
2758 out_free:
2759 if (err) {
2760 drv->scan_req = NULL;
2761 kfree(request);
2762 }
2763 out:
2764 cfg80211_put_dev(drv);
2765 dev_put(dev);
2766 out_rtnl:
2767 rtnl_unlock();
2768
2769 return err;
2770 }
2771
2772 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
2773 struct cfg80211_registered_device *rdev,
2774 struct net_device *dev,
2775 struct cfg80211_bss *res)
2776 {
2777 void *hdr;
2778 struct nlattr *bss;
2779
2780 hdr = nl80211hdr_put(msg, pid, seq, flags,
2781 NL80211_CMD_NEW_SCAN_RESULTS);
2782 if (!hdr)
2783 return -1;
2784
2785 NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
2786 rdev->bss_generation);
2787 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2788
2789 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
2790 if (!bss)
2791 goto nla_put_failure;
2792 if (!is_zero_ether_addr(res->bssid))
2793 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
2794 if (res->information_elements && res->len_information_elements)
2795 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
2796 res->len_information_elements,
2797 res->information_elements);
2798 if (res->tsf)
2799 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
2800 if (res->beacon_interval)
2801 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
2802 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
2803 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
2804
2805 switch (rdev->wiphy.signal_type) {
2806 case CFG80211_SIGNAL_TYPE_MBM:
2807 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
2808 break;
2809 case CFG80211_SIGNAL_TYPE_UNSPEC:
2810 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
2811 break;
2812 default:
2813 break;
2814 }
2815
2816 nla_nest_end(msg, bss);
2817
2818 return genlmsg_end(msg, hdr);
2819
2820 nla_put_failure:
2821 genlmsg_cancel(msg, hdr);
2822 return -EMSGSIZE;
2823 }
2824
2825 static int nl80211_dump_scan(struct sk_buff *skb,
2826 struct netlink_callback *cb)
2827 {
2828 struct cfg80211_registered_device *dev;
2829 struct net_device *netdev;
2830 struct cfg80211_internal_bss *scan;
2831 int ifidx = cb->args[0];
2832 int start = cb->args[1], idx = 0;
2833 int err;
2834
2835 if (!ifidx) {
2836 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2837 nl80211_fam.attrbuf, nl80211_fam.maxattr,
2838 nl80211_policy);
2839 if (err)
2840 return err;
2841
2842 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2843 return -EINVAL;
2844
2845 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2846 if (!ifidx)
2847 return -EINVAL;
2848 cb->args[0] = ifidx;
2849 }
2850
2851 netdev = dev_get_by_index(&init_net, ifidx);
2852 if (!netdev)
2853 return -ENODEV;
2854
2855 dev = cfg80211_get_dev_from_ifindex(ifidx);
2856 if (IS_ERR(dev)) {
2857 err = PTR_ERR(dev);
2858 goto out_put_netdev;
2859 }
2860
2861 spin_lock_bh(&dev->bss_lock);
2862 cfg80211_bss_expire(dev);
2863
2864 list_for_each_entry(scan, &dev->bss_list, list) {
2865 if (++idx <= start)
2866 continue;
2867 if (nl80211_send_bss(skb,
2868 NETLINK_CB(cb->skb).pid,
2869 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2870 dev, netdev, &scan->pub) < 0) {
2871 idx--;
2872 goto out;
2873 }
2874 }
2875
2876 out:
2877 spin_unlock_bh(&dev->bss_lock);
2878
2879 cb->args[1] = idx;
2880 err = skb->len;
2881 cfg80211_put_dev(dev);
2882 out_put_netdev:
2883 dev_put(netdev);
2884
2885 return err;
2886 }
2887
2888 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
2889 {
2890 return auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM ||
2891 auth_type == NL80211_AUTHTYPE_SHARED_KEY ||
2892 auth_type == NL80211_AUTHTYPE_FT ||
2893 auth_type == NL80211_AUTHTYPE_NETWORK_EAP;
2894 }
2895
2896 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
2897 {
2898 struct cfg80211_registered_device *drv;
2899 struct net_device *dev;
2900 struct cfg80211_auth_request req;
2901 struct wiphy *wiphy;
2902 int err;
2903
2904 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2905 return -EINVAL;
2906
2907 if (!info->attrs[NL80211_ATTR_MAC])
2908 return -EINVAL;
2909
2910 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
2911 return -EINVAL;
2912
2913 rtnl_lock();
2914
2915 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2916 if (err)
2917 goto unlock_rtnl;
2918
2919 if (!drv->ops->auth) {
2920 err = -EOPNOTSUPP;
2921 goto out;
2922 }
2923
2924 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
2925 err = -EOPNOTSUPP;
2926 goto out;
2927 }
2928
2929 if (!netif_running(dev)) {
2930 err = -ENETDOWN;
2931 goto out;
2932 }
2933
2934 wiphy = &drv->wiphy;
2935 memset(&req, 0, sizeof(req));
2936
2937 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2938
2939 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2940 req.chan = ieee80211_get_channel(
2941 wiphy,
2942 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
2943 if (!req.chan) {
2944 err = -EINVAL;
2945 goto out;
2946 }
2947 }
2948
2949 if (info->attrs[NL80211_ATTR_SSID]) {
2950 req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2951 req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
2952 }
2953
2954 if (info->attrs[NL80211_ATTR_IE]) {
2955 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
2956 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2957 }
2958
2959 req.auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
2960 if (!nl80211_valid_auth_type(req.auth_type)) {
2961 err = -EINVAL;
2962 goto out;
2963 }
2964
2965 err = drv->ops->auth(&drv->wiphy, dev, &req);
2966
2967 out:
2968 cfg80211_put_dev(drv);
2969 dev_put(dev);
2970 unlock_rtnl:
2971 rtnl_unlock();
2972 return err;
2973 }
2974
2975 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
2976 {
2977 struct cfg80211_registered_device *drv;
2978 struct net_device *dev;
2979 struct cfg80211_assoc_request req;
2980 struct wiphy *wiphy;
2981 int err;
2982
2983 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2984 return -EINVAL;
2985
2986 if (!info->attrs[NL80211_ATTR_MAC] ||
2987 !info->attrs[NL80211_ATTR_SSID])
2988 return -EINVAL;
2989
2990 rtnl_lock();
2991
2992 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2993 if (err)
2994 goto unlock_rtnl;
2995
2996 if (!drv->ops->assoc) {
2997 err = -EOPNOTSUPP;
2998 goto out;
2999 }
3000
3001 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3002 err = -EOPNOTSUPP;
3003 goto out;
3004 }
3005
3006 if (!netif_running(dev)) {
3007 err = -ENETDOWN;
3008 goto out;
3009 }
3010
3011 wiphy = &drv->wiphy;
3012 memset(&req, 0, sizeof(req));
3013
3014 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3015
3016 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3017 req.chan = ieee80211_get_channel(
3018 wiphy,
3019 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3020 if (!req.chan) {
3021 err = -EINVAL;
3022 goto out;
3023 }
3024 }
3025
3026 req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3027 req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3028
3029 if (info->attrs[NL80211_ATTR_IE]) {
3030 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3031 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3032 }
3033
3034 if (info->attrs[NL80211_ATTR_USE_MFP]) {
3035 enum nl80211_mfp use_mfp =
3036 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3037 if (use_mfp == NL80211_MFP_REQUIRED)
3038 req.use_mfp = true;
3039 else if (use_mfp != NL80211_MFP_NO) {
3040 err = -EINVAL;
3041 goto out;
3042 }
3043 }
3044
3045 req.control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3046
3047 err = drv->ops->assoc(&drv->wiphy, dev, &req);
3048
3049 out:
3050 cfg80211_put_dev(drv);
3051 dev_put(dev);
3052 unlock_rtnl:
3053 rtnl_unlock();
3054 return err;
3055 }
3056
3057 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3058 {
3059 struct cfg80211_registered_device *drv;
3060 struct net_device *dev;
3061 struct cfg80211_deauth_request req;
3062 struct wiphy *wiphy;
3063 int err;
3064
3065 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3066 return -EINVAL;
3067
3068 if (!info->attrs[NL80211_ATTR_MAC])
3069 return -EINVAL;
3070
3071 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3072 return -EINVAL;
3073
3074 rtnl_lock();
3075
3076 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3077 if (err)
3078 goto unlock_rtnl;
3079
3080 if (!drv->ops->deauth) {
3081 err = -EOPNOTSUPP;
3082 goto out;
3083 }
3084
3085 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3086 err = -EOPNOTSUPP;
3087 goto out;
3088 }
3089
3090 if (!netif_running(dev)) {
3091 err = -ENETDOWN;
3092 goto out;
3093 }
3094
3095 wiphy = &drv->wiphy;
3096 memset(&req, 0, sizeof(req));
3097
3098 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3099
3100 req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3101 if (req.reason_code == 0) {
3102 /* Reason Code 0 is reserved */
3103 err = -EINVAL;
3104 goto out;
3105 }
3106
3107 if (info->attrs[NL80211_ATTR_IE]) {
3108 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3109 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3110 }
3111
3112 err = drv->ops->deauth(&drv->wiphy, dev, &req);
3113
3114 out:
3115 cfg80211_put_dev(drv);
3116 dev_put(dev);
3117 unlock_rtnl:
3118 rtnl_unlock();
3119 return err;
3120 }
3121
3122 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3123 {
3124 struct cfg80211_registered_device *drv;
3125 struct net_device *dev;
3126 struct cfg80211_disassoc_request req;
3127 struct wiphy *wiphy;
3128 int err;
3129
3130 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3131 return -EINVAL;
3132
3133 if (!info->attrs[NL80211_ATTR_MAC])
3134 return -EINVAL;
3135
3136 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3137 return -EINVAL;
3138
3139 rtnl_lock();
3140
3141 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3142 if (err)
3143 goto unlock_rtnl;
3144
3145 if (!drv->ops->disassoc) {
3146 err = -EOPNOTSUPP;
3147 goto out;
3148 }
3149
3150 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3151 err = -EOPNOTSUPP;
3152 goto out;
3153 }
3154
3155 if (!netif_running(dev)) {
3156 err = -ENETDOWN;
3157 goto out;
3158 }
3159
3160 wiphy = &drv->wiphy;
3161 memset(&req, 0, sizeof(req));
3162
3163 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3164
3165 req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3166 if (req.reason_code == 0) {
3167 /* Reason Code 0 is reserved */
3168 err = -EINVAL;
3169 goto out;
3170 }
3171
3172 if (info->attrs[NL80211_ATTR_IE]) {
3173 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3174 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3175 }
3176
3177 err = drv->ops->disassoc(&drv->wiphy, dev, &req);
3178
3179 out:
3180 cfg80211_put_dev(drv);
3181 dev_put(dev);
3182 unlock_rtnl:
3183 rtnl_unlock();
3184 return err;
3185 }
3186
3187 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3188 {
3189 struct cfg80211_registered_device *drv;
3190 struct net_device *dev;
3191 struct cfg80211_ibss_params ibss;
3192 struct wiphy *wiphy;
3193 int err;
3194
3195 memset(&ibss, 0, sizeof(ibss));
3196
3197 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3198 return -EINVAL;
3199
3200 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3201 !info->attrs[NL80211_ATTR_SSID] ||
3202 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3203 return -EINVAL;
3204
3205 ibss.beacon_interval = 100;
3206
3207 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3208 ibss.beacon_interval =
3209 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3210 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3211 return -EINVAL;
3212 }
3213
3214 rtnl_lock();
3215
3216 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3217 if (err)
3218 goto unlock_rtnl;
3219
3220 if (!drv->ops->join_ibss) {
3221 err = -EOPNOTSUPP;
3222 goto out;
3223 }
3224
3225 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3226 err = -EOPNOTSUPP;
3227 goto out;
3228 }
3229
3230 if (!netif_running(dev)) {
3231 err = -ENETDOWN;
3232 goto out;
3233 }
3234
3235 wiphy = &drv->wiphy;
3236
3237 if (info->attrs[NL80211_ATTR_MAC])
3238 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3239 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3240 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3241
3242 if (info->attrs[NL80211_ATTR_IE]) {
3243 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3244 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3245 }
3246
3247 ibss.channel = ieee80211_get_channel(wiphy,
3248 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3249 if (!ibss.channel ||
3250 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3251 ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3252 err = -EINVAL;
3253 goto out;
3254 }
3255
3256 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3257
3258 err = cfg80211_join_ibss(drv, dev, &ibss);
3259
3260 out:
3261 cfg80211_put_dev(drv);
3262 dev_put(dev);
3263 unlock_rtnl:
3264 rtnl_unlock();
3265 return err;
3266 }
3267
3268 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3269 {
3270 struct cfg80211_registered_device *drv;
3271 struct net_device *dev;
3272 int err;
3273
3274 rtnl_lock();
3275
3276 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3277 if (err)
3278 goto unlock_rtnl;
3279
3280 if (!drv->ops->leave_ibss) {
3281 err = -EOPNOTSUPP;
3282 goto out;
3283 }
3284
3285 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3286 err = -EOPNOTSUPP;
3287 goto out;
3288 }
3289
3290 if (!netif_running(dev)) {
3291 err = -ENETDOWN;
3292 goto out;
3293 }
3294
3295 err = cfg80211_leave_ibss(drv, dev, false);
3296
3297 out:
3298 cfg80211_put_dev(drv);
3299 dev_put(dev);
3300 unlock_rtnl:
3301 rtnl_unlock();
3302 return err;
3303 }
3304
3305 static struct genl_ops nl80211_ops[] = {
3306 {
3307 .cmd = NL80211_CMD_GET_WIPHY,
3308 .doit = nl80211_get_wiphy,
3309 .dumpit = nl80211_dump_wiphy,
3310 .policy = nl80211_policy,
3311 /* can be retrieved by unprivileged users */
3312 },
3313 {
3314 .cmd = NL80211_CMD_SET_WIPHY,
3315 .doit = nl80211_set_wiphy,
3316 .policy = nl80211_policy,
3317 .flags = GENL_ADMIN_PERM,
3318 },
3319 {
3320 .cmd = NL80211_CMD_GET_INTERFACE,
3321 .doit = nl80211_get_interface,
3322 .dumpit = nl80211_dump_interface,
3323 .policy = nl80211_policy,
3324 /* can be retrieved by unprivileged users */
3325 },
3326 {
3327 .cmd = NL80211_CMD_SET_INTERFACE,
3328 .doit = nl80211_set_interface,
3329 .policy = nl80211_policy,
3330 .flags = GENL_ADMIN_PERM,
3331 },
3332 {
3333 .cmd = NL80211_CMD_NEW_INTERFACE,
3334 .doit = nl80211_new_interface,
3335 .policy = nl80211_policy,
3336 .flags = GENL_ADMIN_PERM,
3337 },
3338 {
3339 .cmd = NL80211_CMD_DEL_INTERFACE,
3340 .doit = nl80211_del_interface,
3341 .policy = nl80211_policy,
3342 .flags = GENL_ADMIN_PERM,
3343 },
3344 {
3345 .cmd = NL80211_CMD_GET_KEY,
3346 .doit = nl80211_get_key,
3347 .policy = nl80211_policy,
3348 .flags = GENL_ADMIN_PERM,
3349 },
3350 {
3351 .cmd = NL80211_CMD_SET_KEY,
3352 .doit = nl80211_set_key,
3353 .policy = nl80211_policy,
3354 .flags = GENL_ADMIN_PERM,
3355 },
3356 {
3357 .cmd = NL80211_CMD_NEW_KEY,
3358 .doit = nl80211_new_key,
3359 .policy = nl80211_policy,
3360 .flags = GENL_ADMIN_PERM,
3361 },
3362 {
3363 .cmd = NL80211_CMD_DEL_KEY,
3364 .doit = nl80211_del_key,
3365 .policy = nl80211_policy,
3366 .flags = GENL_ADMIN_PERM,
3367 },
3368 {
3369 .cmd = NL80211_CMD_SET_BEACON,
3370 .policy = nl80211_policy,
3371 .flags = GENL_ADMIN_PERM,
3372 .doit = nl80211_addset_beacon,
3373 },
3374 {
3375 .cmd = NL80211_CMD_NEW_BEACON,
3376 .policy = nl80211_policy,
3377 .flags = GENL_ADMIN_PERM,
3378 .doit = nl80211_addset_beacon,
3379 },
3380 {
3381 .cmd = NL80211_CMD_DEL_BEACON,
3382 .policy = nl80211_policy,
3383 .flags = GENL_ADMIN_PERM,
3384 .doit = nl80211_del_beacon,
3385 },
3386 {
3387 .cmd = NL80211_CMD_GET_STATION,
3388 .doit = nl80211_get_station,
3389 .dumpit = nl80211_dump_station,
3390 .policy = nl80211_policy,
3391 },
3392 {
3393 .cmd = NL80211_CMD_SET_STATION,
3394 .doit = nl80211_set_station,
3395 .policy = nl80211_policy,
3396 .flags = GENL_ADMIN_PERM,
3397 },
3398 {
3399 .cmd = NL80211_CMD_NEW_STATION,
3400 .doit = nl80211_new_station,
3401 .policy = nl80211_policy,
3402 .flags = GENL_ADMIN_PERM,
3403 },
3404 {
3405 .cmd = NL80211_CMD_DEL_STATION,
3406 .doit = nl80211_del_station,
3407 .policy = nl80211_policy,
3408 .flags = GENL_ADMIN_PERM,
3409 },
3410 {
3411 .cmd = NL80211_CMD_GET_MPATH,
3412 .doit = nl80211_get_mpath,
3413 .dumpit = nl80211_dump_mpath,
3414 .policy = nl80211_policy,
3415 .flags = GENL_ADMIN_PERM,
3416 },
3417 {
3418 .cmd = NL80211_CMD_SET_MPATH,
3419 .doit = nl80211_set_mpath,
3420 .policy = nl80211_policy,
3421 .flags = GENL_ADMIN_PERM,
3422 },
3423 {
3424 .cmd = NL80211_CMD_NEW_MPATH,
3425 .doit = nl80211_new_mpath,
3426 .policy = nl80211_policy,
3427 .flags = GENL_ADMIN_PERM,
3428 },
3429 {
3430 .cmd = NL80211_CMD_DEL_MPATH,
3431 .doit = nl80211_del_mpath,
3432 .policy = nl80211_policy,
3433 .flags = GENL_ADMIN_PERM,
3434 },
3435 {
3436 .cmd = NL80211_CMD_SET_BSS,
3437 .doit = nl80211_set_bss,
3438 .policy = nl80211_policy,
3439 .flags = GENL_ADMIN_PERM,
3440 },
3441 {
3442 .cmd = NL80211_CMD_GET_REG,
3443 .doit = nl80211_get_reg,
3444 .policy = nl80211_policy,
3445 /* can be retrieved by unprivileged users */
3446 },
3447 {
3448 .cmd = NL80211_CMD_SET_REG,
3449 .doit = nl80211_set_reg,
3450 .policy = nl80211_policy,
3451 .flags = GENL_ADMIN_PERM,
3452 },
3453 {
3454 .cmd = NL80211_CMD_REQ_SET_REG,
3455 .doit = nl80211_req_set_reg,
3456 .policy = nl80211_policy,
3457 .flags = GENL_ADMIN_PERM,
3458 },
3459 {
3460 .cmd = NL80211_CMD_GET_MESH_PARAMS,
3461 .doit = nl80211_get_mesh_params,
3462 .policy = nl80211_policy,
3463 /* can be retrieved by unprivileged users */
3464 },
3465 {
3466 .cmd = NL80211_CMD_SET_MESH_PARAMS,
3467 .doit = nl80211_set_mesh_params,
3468 .policy = nl80211_policy,
3469 .flags = GENL_ADMIN_PERM,
3470 },
3471 {
3472 .cmd = NL80211_CMD_TRIGGER_SCAN,
3473 .doit = nl80211_trigger_scan,
3474 .policy = nl80211_policy,
3475 .flags = GENL_ADMIN_PERM,
3476 },
3477 {
3478 .cmd = NL80211_CMD_GET_SCAN,
3479 .policy = nl80211_policy,
3480 .dumpit = nl80211_dump_scan,
3481 },
3482 {
3483 .cmd = NL80211_CMD_AUTHENTICATE,
3484 .doit = nl80211_authenticate,
3485 .policy = nl80211_policy,
3486 .flags = GENL_ADMIN_PERM,
3487 },
3488 {
3489 .cmd = NL80211_CMD_ASSOCIATE,
3490 .doit = nl80211_associate,
3491 .policy = nl80211_policy,
3492 .flags = GENL_ADMIN_PERM,
3493 },
3494 {
3495 .cmd = NL80211_CMD_DEAUTHENTICATE,
3496 .doit = nl80211_deauthenticate,
3497 .policy = nl80211_policy,
3498 .flags = GENL_ADMIN_PERM,
3499 },
3500 {
3501 .cmd = NL80211_CMD_DISASSOCIATE,
3502 .doit = nl80211_disassociate,
3503 .policy = nl80211_policy,
3504 .flags = GENL_ADMIN_PERM,
3505 },
3506 {
3507 .cmd = NL80211_CMD_JOIN_IBSS,
3508 .doit = nl80211_join_ibss,
3509 .policy = nl80211_policy,
3510 .flags = GENL_ADMIN_PERM,
3511 },
3512 {
3513 .cmd = NL80211_CMD_LEAVE_IBSS,
3514 .doit = nl80211_leave_ibss,
3515 .policy = nl80211_policy,
3516 .flags = GENL_ADMIN_PERM,
3517 },
3518 };
3519 static struct genl_multicast_group nl80211_mlme_mcgrp = {
3520 .name = "mlme",
3521 };
3522
3523 /* multicast groups */
3524 static struct genl_multicast_group nl80211_config_mcgrp = {
3525 .name = "config",
3526 };
3527 static struct genl_multicast_group nl80211_scan_mcgrp = {
3528 .name = "scan",
3529 };
3530 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
3531 .name = "regulatory",
3532 };
3533
3534 /* notification functions */
3535
3536 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
3537 {
3538 struct sk_buff *msg;
3539
3540 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3541 if (!msg)
3542 return;
3543
3544 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
3545 nlmsg_free(msg);
3546 return;
3547 }
3548
3549 genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
3550 }
3551
3552 static int nl80211_send_scan_donemsg(struct sk_buff *msg,
3553 struct cfg80211_registered_device *rdev,
3554 struct net_device *netdev,
3555 u32 pid, u32 seq, int flags,
3556 u32 cmd)
3557 {
3558 void *hdr;
3559
3560 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
3561 if (!hdr)
3562 return -1;
3563
3564 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3565 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3566
3567 /* XXX: we should probably bounce back the request? */
3568
3569 return genlmsg_end(msg, hdr);
3570
3571 nla_put_failure:
3572 genlmsg_cancel(msg, hdr);
3573 return -EMSGSIZE;
3574 }
3575
3576 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
3577 struct net_device *netdev)
3578 {
3579 struct sk_buff *msg;
3580
3581 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3582 if (!msg)
3583 return;
3584
3585 if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3586 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
3587 nlmsg_free(msg);
3588 return;
3589 }
3590
3591 genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3592 }
3593
3594 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
3595 struct net_device *netdev)
3596 {
3597 struct sk_buff *msg;
3598
3599 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3600 if (!msg)
3601 return;
3602
3603 if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3604 NL80211_CMD_SCAN_ABORTED) < 0) {
3605 nlmsg_free(msg);
3606 return;
3607 }
3608
3609 genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3610 }
3611
3612 /*
3613 * This can happen on global regulatory changes or device specific settings
3614 * based on custom world regulatory domains.
3615 */
3616 void nl80211_send_reg_change_event(struct regulatory_request *request)
3617 {
3618 struct sk_buff *msg;
3619 void *hdr;
3620
3621 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3622 if (!msg)
3623 return;
3624
3625 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
3626 if (!hdr) {
3627 nlmsg_free(msg);
3628 return;
3629 }
3630
3631 /* Userspace can always count this one always being set */
3632 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
3633
3634 if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
3635 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3636 NL80211_REGDOM_TYPE_WORLD);
3637 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
3638 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3639 NL80211_REGDOM_TYPE_CUSTOM_WORLD);
3640 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
3641 request->intersect)
3642 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3643 NL80211_REGDOM_TYPE_INTERSECTION);
3644 else {
3645 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3646 NL80211_REGDOM_TYPE_COUNTRY);
3647 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
3648 }
3649
3650 if (wiphy_idx_valid(request->wiphy_idx))
3651 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
3652
3653 if (genlmsg_end(msg, hdr) < 0) {
3654 nlmsg_free(msg);
3655 return;
3656 }
3657
3658 genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_KERNEL);
3659
3660 return;
3661
3662 nla_put_failure:
3663 genlmsg_cancel(msg, hdr);
3664 nlmsg_free(msg);
3665 }
3666
3667 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
3668 struct net_device *netdev,
3669 const u8 *buf, size_t len,
3670 enum nl80211_commands cmd)
3671 {
3672 struct sk_buff *msg;
3673 void *hdr;
3674
3675 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3676 if (!msg)
3677 return;
3678
3679 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3680 if (!hdr) {
3681 nlmsg_free(msg);
3682 return;
3683 }
3684
3685 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3686 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3687 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
3688
3689 if (genlmsg_end(msg, hdr) < 0) {
3690 nlmsg_free(msg);
3691 return;
3692 }
3693
3694 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3695 return;
3696
3697 nla_put_failure:
3698 genlmsg_cancel(msg, hdr);
3699 nlmsg_free(msg);
3700 }
3701
3702 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
3703 struct net_device *netdev, const u8 *buf, size_t len)
3704 {
3705 nl80211_send_mlme_event(rdev, netdev, buf, len,
3706 NL80211_CMD_AUTHENTICATE);
3707 }
3708
3709 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
3710 struct net_device *netdev, const u8 *buf,
3711 size_t len)
3712 {
3713 nl80211_send_mlme_event(rdev, netdev, buf, len, NL80211_CMD_ASSOCIATE);
3714 }
3715
3716 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
3717 struct net_device *netdev, const u8 *buf, size_t len)
3718 {
3719 nl80211_send_mlme_event(rdev, netdev, buf, len,
3720 NL80211_CMD_DEAUTHENTICATE);
3721 }
3722
3723 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
3724 struct net_device *netdev, const u8 *buf,
3725 size_t len)
3726 {
3727 nl80211_send_mlme_event(rdev, netdev, buf, len,
3728 NL80211_CMD_DISASSOCIATE);
3729 }
3730
3731 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
3732 struct net_device *netdev, int cmd,
3733 const u8 *addr)
3734 {
3735 struct sk_buff *msg;
3736 void *hdr;
3737
3738 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3739 if (!msg)
3740 return;
3741
3742 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3743 if (!hdr) {
3744 nlmsg_free(msg);
3745 return;
3746 }
3747
3748 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3749 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3750 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
3751 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3752
3753 if (genlmsg_end(msg, hdr) < 0) {
3754 nlmsg_free(msg);
3755 return;
3756 }
3757
3758 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3759 return;
3760
3761 nla_put_failure:
3762 genlmsg_cancel(msg, hdr);
3763 nlmsg_free(msg);
3764 }
3765
3766 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
3767 struct net_device *netdev, const u8 *addr)
3768 {
3769 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
3770 addr);
3771 }
3772
3773 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
3774 struct net_device *netdev, const u8 *addr)
3775 {
3776 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE, addr);
3777 }
3778
3779 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
3780 struct net_device *netdev, const u8 *bssid,
3781 gfp_t gfp)
3782 {
3783 struct sk_buff *msg;
3784 void *hdr;
3785
3786 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
3787 if (!msg)
3788 return;
3789
3790 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
3791 if (!hdr) {
3792 nlmsg_free(msg);
3793 return;
3794 }
3795
3796 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3797 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3798 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
3799
3800 if (genlmsg_end(msg, hdr) < 0) {
3801 nlmsg_free(msg);
3802 return;
3803 }
3804
3805 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
3806 return;
3807
3808 nla_put_failure:
3809 genlmsg_cancel(msg, hdr);
3810 nlmsg_free(msg);
3811 }
3812
3813 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
3814 struct net_device *netdev, const u8 *addr,
3815 enum nl80211_key_type key_type, int key_id,
3816 const u8 *tsc)
3817 {
3818 struct sk_buff *msg;
3819 void *hdr;
3820
3821 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3822 if (!msg)
3823 return;
3824
3825 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
3826 if (!hdr) {
3827 nlmsg_free(msg);
3828 return;
3829 }
3830
3831 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3832 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3833 if (addr)
3834 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3835 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
3836 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
3837 if (tsc)
3838 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
3839
3840 if (genlmsg_end(msg, hdr) < 0) {
3841 nlmsg_free(msg);
3842 return;
3843 }
3844
3845 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_KERNEL);
3846 return;
3847
3848 nla_put_failure:
3849 genlmsg_cancel(msg, hdr);
3850 nlmsg_free(msg);
3851 }
3852
3853 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
3854 struct ieee80211_channel *channel_before,
3855 struct ieee80211_channel *channel_after)
3856 {
3857 struct sk_buff *msg;
3858 void *hdr;
3859 struct nlattr *nl_freq;
3860
3861 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3862 if (!msg)
3863 return;
3864
3865 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
3866 if (!hdr) {
3867 nlmsg_free(msg);
3868 return;
3869 }
3870
3871 /*
3872 * Since we are applying the beacon hint to a wiphy we know its
3873 * wiphy_idx is valid
3874 */
3875 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
3876
3877 /* Before */
3878 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
3879 if (!nl_freq)
3880 goto nla_put_failure;
3881 if (nl80211_msg_put_channel(msg, channel_before))
3882 goto nla_put_failure;
3883 nla_nest_end(msg, nl_freq);
3884
3885 /* After */
3886 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
3887 if (!nl_freq)
3888 goto nla_put_failure;
3889 if (nl80211_msg_put_channel(msg, channel_after))
3890 goto nla_put_failure;
3891 nla_nest_end(msg, nl_freq);
3892
3893 if (genlmsg_end(msg, hdr) < 0) {
3894 nlmsg_free(msg);
3895 return;
3896 }
3897
3898 genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_ATOMIC);
3899
3900 return;
3901
3902 nla_put_failure:
3903 genlmsg_cancel(msg, hdr);
3904 nlmsg_free(msg);
3905 }
3906
3907 /* initialisation/exit functions */
3908
3909 int nl80211_init(void)
3910 {
3911 int err, i;
3912
3913 err = genl_register_family(&nl80211_fam);
3914 if (err)
3915 return err;
3916
3917 for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
3918 err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
3919 if (err)
3920 goto err_out;
3921 }
3922
3923 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
3924 if (err)
3925 goto err_out;
3926
3927 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
3928 if (err)
3929 goto err_out;
3930
3931 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
3932 if (err)
3933 goto err_out;
3934
3935 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
3936 if (err)
3937 goto err_out;
3938
3939 return 0;
3940 err_out:
3941 genl_unregister_family(&nl80211_fam);
3942 return err;
3943 }
3944
3945 void nl80211_exit(void)
3946 {
3947 genl_unregister_family(&nl80211_fam);
3948 }
Linux kernel - Deliverables
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