]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - net/wireless/nl80211.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
cfg80211: introduce nl80211 testmode command
[mirror_ubuntu-bionic-kernel.git] / net / wireless / nl80211.c
1 /*
2 * This is the new netlink-based wireless configuration interface.
3 *
4 * Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net>
5 */
6
7 #include <linux/if.h>
8 #include <linux/module.h>
9 #include <linux/err.h>
10 #include <linux/list.h>
11 #include <linux/if_ether.h>
12 #include <linux/ieee80211.h>
13 #include <linux/nl80211.h>
14 #include <linux/rtnetlink.h>
15 #include <linux/netlink.h>
16 #include <linux/etherdevice.h>
17 #include <net/genetlink.h>
18 #include <net/cfg80211.h>
19 #include "core.h"
20 #include "nl80211.h"
21 #include "reg.h"
22
23 /* the netlink family */
24 static struct genl_family nl80211_fam = {
25 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
26 .name = "nl80211", /* have users key off the name instead */
27 .hdrsize = 0, /* no private header */
28 .version = 1, /* no particular meaning now */
29 .maxattr = NL80211_ATTR_MAX,
30 };
31
32 /* internal helper: get drv and dev */
33 static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
34 struct cfg80211_registered_device **drv,
35 struct net_device **dev)
36 {
37 int ifindex;
38
39 if (!attrs[NL80211_ATTR_IFINDEX])
40 return -EINVAL;
41
42 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
43 *dev = dev_get_by_index(&init_net, ifindex);
44 if (!*dev)
45 return -ENODEV;
46
47 *drv = cfg80211_get_dev_from_ifindex(ifindex);
48 if (IS_ERR(*drv)) {
49 dev_put(*dev);
50 return PTR_ERR(*drv);
51 }
52
53 return 0;
54 }
55
56 /* policy for the attributes */
57 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
58 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
59 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
60 .len = 20-1 },
61 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
62 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
63 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
64 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
65 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
66 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
67 [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
68
69 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
70 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
71 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
72
73 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
74
75 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
76 .len = WLAN_MAX_KEY_LEN },
77 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
78 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
79 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
80 [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
81
82 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
83 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
84 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
85 .len = IEEE80211_MAX_DATA_LEN },
86 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
87 .len = IEEE80211_MAX_DATA_LEN },
88 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
89 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
90 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
91 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
92 .len = NL80211_MAX_SUPP_RATES },
93 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
94 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
95 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
96 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
97 .len = IEEE80211_MAX_MESH_ID_LEN },
98 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
99
100 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
101 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
102
103 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
104 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
105 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
106 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
107 .len = NL80211_MAX_SUPP_RATES },
108
109 [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
110
111 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
112 .len = NL80211_HT_CAPABILITY_LEN },
113
114 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
115 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
116 .len = IEEE80211_MAX_DATA_LEN },
117 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
118 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
119
120 [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
121 .len = IEEE80211_MAX_SSID_LEN },
122 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
123 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
124 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
125 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
126 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
127 [NL80211_ATTR_STA_FLAGS2] = {
128 .len = sizeof(struct nl80211_sta_flag_update),
129 },
130 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
131 };
132
133 /* IE validation */
134 static bool is_valid_ie_attr(const struct nlattr *attr)
135 {
136 const u8 *pos;
137 int len;
138
139 if (!attr)
140 return true;
141
142 pos = nla_data(attr);
143 len = nla_len(attr);
144
145 while (len) {
146 u8 elemlen;
147
148 if (len < 2)
149 return false;
150 len -= 2;
151
152 elemlen = pos[1];
153 if (elemlen > len)
154 return false;
155
156 len -= elemlen;
157 pos += 2 + elemlen;
158 }
159
160 return true;
161 }
162
163 /* message building helper */
164 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
165 int flags, u8 cmd)
166 {
167 /* since there is no private header just add the generic one */
168 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
169 }
170
171 static int nl80211_msg_put_channel(struct sk_buff *msg,
172 struct ieee80211_channel *chan)
173 {
174 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
175 chan->center_freq);
176
177 if (chan->flags & IEEE80211_CHAN_DISABLED)
178 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
179 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
180 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
181 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
182 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
183 if (chan->flags & IEEE80211_CHAN_RADAR)
184 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
185
186 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
187 DBM_TO_MBM(chan->max_power));
188
189 return 0;
190
191 nla_put_failure:
192 return -ENOBUFS;
193 }
194
195 /* netlink command implementations */
196
197 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
198 struct cfg80211_registered_device *dev)
199 {
200 void *hdr;
201 struct nlattr *nl_bands, *nl_band;
202 struct nlattr *nl_freqs, *nl_freq;
203 struct nlattr *nl_rates, *nl_rate;
204 struct nlattr *nl_modes;
205 struct nlattr *nl_cmds;
206 enum ieee80211_band band;
207 struct ieee80211_channel *chan;
208 struct ieee80211_rate *rate;
209 int i;
210 u16 ifmodes = dev->wiphy.interface_modes;
211
212 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
213 if (!hdr)
214 return -1;
215
216 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
217 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
218
219 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
220 dev->wiphy.retry_short);
221 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
222 dev->wiphy.retry_long);
223 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
224 dev->wiphy.frag_threshold);
225 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
226 dev->wiphy.rts_threshold);
227
228 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
229 dev->wiphy.max_scan_ssids);
230 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
231 dev->wiphy.max_scan_ie_len);
232
233 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
234 sizeof(u32) * dev->wiphy.n_cipher_suites,
235 dev->wiphy.cipher_suites);
236
237 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
238 if (!nl_modes)
239 goto nla_put_failure;
240
241 i = 0;
242 while (ifmodes) {
243 if (ifmodes & 1)
244 NLA_PUT_FLAG(msg, i);
245 ifmodes >>= 1;
246 i++;
247 }
248
249 nla_nest_end(msg, nl_modes);
250
251 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
252 if (!nl_bands)
253 goto nla_put_failure;
254
255 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
256 if (!dev->wiphy.bands[band])
257 continue;
258
259 nl_band = nla_nest_start(msg, band);
260 if (!nl_band)
261 goto nla_put_failure;
262
263 /* add HT info */
264 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
265 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
266 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
267 &dev->wiphy.bands[band]->ht_cap.mcs);
268 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
269 dev->wiphy.bands[band]->ht_cap.cap);
270 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
271 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
272 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
273 dev->wiphy.bands[band]->ht_cap.ampdu_density);
274 }
275
276 /* add frequencies */
277 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
278 if (!nl_freqs)
279 goto nla_put_failure;
280
281 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
282 nl_freq = nla_nest_start(msg, i);
283 if (!nl_freq)
284 goto nla_put_failure;
285
286 chan = &dev->wiphy.bands[band]->channels[i];
287
288 if (nl80211_msg_put_channel(msg, chan))
289 goto nla_put_failure;
290
291 nla_nest_end(msg, nl_freq);
292 }
293
294 nla_nest_end(msg, nl_freqs);
295
296 /* add bitrates */
297 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
298 if (!nl_rates)
299 goto nla_put_failure;
300
301 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
302 nl_rate = nla_nest_start(msg, i);
303 if (!nl_rate)
304 goto nla_put_failure;
305
306 rate = &dev->wiphy.bands[band]->bitrates[i];
307 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
308 rate->bitrate);
309 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
310 NLA_PUT_FLAG(msg,
311 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
312
313 nla_nest_end(msg, nl_rate);
314 }
315
316 nla_nest_end(msg, nl_rates);
317
318 nla_nest_end(msg, nl_band);
319 }
320 nla_nest_end(msg, nl_bands);
321
322 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
323 if (!nl_cmds)
324 goto nla_put_failure;
325
326 i = 0;
327 #define CMD(op, n) \
328 do { \
329 if (dev->ops->op) { \
330 i++; \
331 NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
332 } \
333 } while (0)
334
335 CMD(add_virtual_intf, NEW_INTERFACE);
336 CMD(change_virtual_intf, SET_INTERFACE);
337 CMD(add_key, NEW_KEY);
338 CMD(add_beacon, NEW_BEACON);
339 CMD(add_station, NEW_STATION);
340 CMD(add_mpath, NEW_MPATH);
341 CMD(set_mesh_params, SET_MESH_PARAMS);
342 CMD(change_bss, SET_BSS);
343 CMD(auth, AUTHENTICATE);
344 CMD(assoc, ASSOCIATE);
345 CMD(deauth, DEAUTHENTICATE);
346 CMD(disassoc, DISASSOCIATE);
347 CMD(join_ibss, JOIN_IBSS);
348
349 #undef CMD
350 nla_nest_end(msg, nl_cmds);
351
352 return genlmsg_end(msg, hdr);
353
354 nla_put_failure:
355 genlmsg_cancel(msg, hdr);
356 return -EMSGSIZE;
357 }
358
359 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
360 {
361 int idx = 0;
362 int start = cb->args[0];
363 struct cfg80211_registered_device *dev;
364
365 mutex_lock(&cfg80211_mutex);
366 list_for_each_entry(dev, &cfg80211_drv_list, list) {
367 if (++idx <= start)
368 continue;
369 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
370 cb->nlh->nlmsg_seq, NLM_F_MULTI,
371 dev) < 0) {
372 idx--;
373 break;
374 }
375 }
376 mutex_unlock(&cfg80211_mutex);
377
378 cb->args[0] = idx;
379
380 return skb->len;
381 }
382
383 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
384 {
385 struct sk_buff *msg;
386 struct cfg80211_registered_device *dev;
387
388 dev = cfg80211_get_dev_from_info(info);
389 if (IS_ERR(dev))
390 return PTR_ERR(dev);
391
392 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
393 if (!msg)
394 goto out_err;
395
396 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
397 goto out_free;
398
399 cfg80211_put_dev(dev);
400
401 return genlmsg_unicast(msg, info->snd_pid);
402
403 out_free:
404 nlmsg_free(msg);
405 out_err:
406 cfg80211_put_dev(dev);
407 return -ENOBUFS;
408 }
409
410 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
411 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
412 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
413 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
414 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
415 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
416 };
417
418 static int parse_txq_params(struct nlattr *tb[],
419 struct ieee80211_txq_params *txq_params)
420 {
421 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
422 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
423 !tb[NL80211_TXQ_ATTR_AIFS])
424 return -EINVAL;
425
426 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
427 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
428 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
429 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
430 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
431
432 return 0;
433 }
434
435 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
436 {
437 struct cfg80211_registered_device *rdev;
438 int result = 0, rem_txq_params = 0;
439 struct nlattr *nl_txq_params;
440 u32 changed;
441 u8 retry_short = 0, retry_long = 0;
442 u32 frag_threshold = 0, rts_threshold = 0;
443
444 rtnl_lock();
445
446 mutex_lock(&cfg80211_mutex);
447
448 rdev = __cfg80211_drv_from_info(info);
449 if (IS_ERR(rdev)) {
450 mutex_unlock(&cfg80211_mutex);
451 result = PTR_ERR(rdev);
452 goto unlock;
453 }
454
455 mutex_lock(&rdev->mtx);
456
457 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
458 result = cfg80211_dev_rename(
459 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
460
461 mutex_unlock(&cfg80211_mutex);
462
463 if (result)
464 goto bad_res;
465
466 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
467 struct ieee80211_txq_params txq_params;
468 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
469
470 if (!rdev->ops->set_txq_params) {
471 result = -EOPNOTSUPP;
472 goto bad_res;
473 }
474
475 nla_for_each_nested(nl_txq_params,
476 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
477 rem_txq_params) {
478 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
479 nla_data(nl_txq_params),
480 nla_len(nl_txq_params),
481 txq_params_policy);
482 result = parse_txq_params(tb, &txq_params);
483 if (result)
484 goto bad_res;
485
486 result = rdev->ops->set_txq_params(&rdev->wiphy,
487 &txq_params);
488 if (result)
489 goto bad_res;
490 }
491 }
492
493 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
494 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
495 struct ieee80211_channel *chan;
496 struct ieee80211_sta_ht_cap *ht_cap;
497 u32 freq;
498
499 if (!rdev->ops->set_channel) {
500 result = -EOPNOTSUPP;
501 goto bad_res;
502 }
503
504 result = -EINVAL;
505
506 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
507 channel_type = nla_get_u32(info->attrs[
508 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
509 if (channel_type != NL80211_CHAN_NO_HT &&
510 channel_type != NL80211_CHAN_HT20 &&
511 channel_type != NL80211_CHAN_HT40PLUS &&
512 channel_type != NL80211_CHAN_HT40MINUS)
513 goto bad_res;
514 }
515
516 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
517 chan = ieee80211_get_channel(&rdev->wiphy, freq);
518
519 /* Primary channel not allowed */
520 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
521 goto bad_res;
522
523 if (channel_type == NL80211_CHAN_HT40MINUS &&
524 (chan->flags & IEEE80211_CHAN_NO_HT40MINUS))
525 goto bad_res;
526 else if (channel_type == NL80211_CHAN_HT40PLUS &&
527 (chan->flags & IEEE80211_CHAN_NO_HT40PLUS))
528 goto bad_res;
529
530 /*
531 * At this point we know if that if HT40 was requested
532 * we are allowed to use it and the extension channel
533 * exists.
534 */
535
536 ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
537
538 /* no HT capabilities or intolerant */
539 if (channel_type != NL80211_CHAN_NO_HT) {
540 if (!ht_cap->ht_supported)
541 goto bad_res;
542 if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
543 (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
544 goto bad_res;
545 }
546
547 result = rdev->ops->set_channel(&rdev->wiphy, chan,
548 channel_type);
549 if (result)
550 goto bad_res;
551 }
552
553 changed = 0;
554
555 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
556 retry_short = nla_get_u8(
557 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
558 if (retry_short == 0) {
559 result = -EINVAL;
560 goto bad_res;
561 }
562 changed |= WIPHY_PARAM_RETRY_SHORT;
563 }
564
565 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
566 retry_long = nla_get_u8(
567 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
568 if (retry_long == 0) {
569 result = -EINVAL;
570 goto bad_res;
571 }
572 changed |= WIPHY_PARAM_RETRY_LONG;
573 }
574
575 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
576 frag_threshold = nla_get_u32(
577 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
578 if (frag_threshold < 256) {
579 result = -EINVAL;
580 goto bad_res;
581 }
582 if (frag_threshold != (u32) -1) {
583 /*
584 * Fragments (apart from the last one) are required to
585 * have even length. Make the fragmentation code
586 * simpler by stripping LSB should someone try to use
587 * odd threshold value.
588 */
589 frag_threshold &= ~0x1;
590 }
591 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
592 }
593
594 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
595 rts_threshold = nla_get_u32(
596 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
597 changed |= WIPHY_PARAM_RTS_THRESHOLD;
598 }
599
600 if (changed) {
601 u8 old_retry_short, old_retry_long;
602 u32 old_frag_threshold, old_rts_threshold;
603
604 if (!rdev->ops->set_wiphy_params) {
605 result = -EOPNOTSUPP;
606 goto bad_res;
607 }
608
609 old_retry_short = rdev->wiphy.retry_short;
610 old_retry_long = rdev->wiphy.retry_long;
611 old_frag_threshold = rdev->wiphy.frag_threshold;
612 old_rts_threshold = rdev->wiphy.rts_threshold;
613
614 if (changed & WIPHY_PARAM_RETRY_SHORT)
615 rdev->wiphy.retry_short = retry_short;
616 if (changed & WIPHY_PARAM_RETRY_LONG)
617 rdev->wiphy.retry_long = retry_long;
618 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
619 rdev->wiphy.frag_threshold = frag_threshold;
620 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
621 rdev->wiphy.rts_threshold = rts_threshold;
622
623 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
624 if (result) {
625 rdev->wiphy.retry_short = old_retry_short;
626 rdev->wiphy.retry_long = old_retry_long;
627 rdev->wiphy.frag_threshold = old_frag_threshold;
628 rdev->wiphy.rts_threshold = old_rts_threshold;
629 }
630 }
631
632 bad_res:
633 mutex_unlock(&rdev->mtx);
634 unlock:
635 rtnl_unlock();
636 return result;
637 }
638
639
640 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
641 struct cfg80211_registered_device *rdev,
642 struct net_device *dev)
643 {
644 void *hdr;
645
646 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
647 if (!hdr)
648 return -1;
649
650 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
651 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
652 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
653 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
654 return genlmsg_end(msg, hdr);
655
656 nla_put_failure:
657 genlmsg_cancel(msg, hdr);
658 return -EMSGSIZE;
659 }
660
661 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
662 {
663 int wp_idx = 0;
664 int if_idx = 0;
665 int wp_start = cb->args[0];
666 int if_start = cb->args[1];
667 struct cfg80211_registered_device *dev;
668 struct wireless_dev *wdev;
669
670 mutex_lock(&cfg80211_mutex);
671 list_for_each_entry(dev, &cfg80211_drv_list, list) {
672 if (wp_idx < wp_start) {
673 wp_idx++;
674 continue;
675 }
676 if_idx = 0;
677
678 mutex_lock(&dev->devlist_mtx);
679 list_for_each_entry(wdev, &dev->netdev_list, list) {
680 if (if_idx < if_start) {
681 if_idx++;
682 continue;
683 }
684 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
685 cb->nlh->nlmsg_seq, NLM_F_MULTI,
686 dev, wdev->netdev) < 0) {
687 mutex_unlock(&dev->devlist_mtx);
688 goto out;
689 }
690 if_idx++;
691 }
692 mutex_unlock(&dev->devlist_mtx);
693
694 wp_idx++;
695 }
696 out:
697 mutex_unlock(&cfg80211_mutex);
698
699 cb->args[0] = wp_idx;
700 cb->args[1] = if_idx;
701
702 return skb->len;
703 }
704
705 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
706 {
707 struct sk_buff *msg;
708 struct cfg80211_registered_device *dev;
709 struct net_device *netdev;
710 int err;
711
712 err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
713 if (err)
714 return err;
715
716 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
717 if (!msg)
718 goto out_err;
719
720 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
721 dev, netdev) < 0)
722 goto out_free;
723
724 dev_put(netdev);
725 cfg80211_put_dev(dev);
726
727 return genlmsg_unicast(msg, info->snd_pid);
728
729 out_free:
730 nlmsg_free(msg);
731 out_err:
732 dev_put(netdev);
733 cfg80211_put_dev(dev);
734 return -ENOBUFS;
735 }
736
737 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
738 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
739 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
740 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
741 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
742 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
743 };
744
745 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
746 {
747 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
748 int flag;
749
750 *mntrflags = 0;
751
752 if (!nla)
753 return -EINVAL;
754
755 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
756 nla, mntr_flags_policy))
757 return -EINVAL;
758
759 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
760 if (flags[flag])
761 *mntrflags |= (1<<flag);
762
763 return 0;
764 }
765
766 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
767 {
768 struct cfg80211_registered_device *drv;
769 struct vif_params params;
770 int err;
771 enum nl80211_iftype otype, ntype;
772 struct net_device *dev;
773 u32 _flags, *flags = NULL;
774 bool change = false;
775
776 memset(&params, 0, sizeof(params));
777
778 rtnl_lock();
779
780 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
781 if (err)
782 goto unlock_rtnl;
783
784 otype = ntype = dev->ieee80211_ptr->iftype;
785
786 if (info->attrs[NL80211_ATTR_IFTYPE]) {
787 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
788 if (otype != ntype)
789 change = true;
790 if (ntype > NL80211_IFTYPE_MAX) {
791 err = -EINVAL;
792 goto unlock;
793 }
794 }
795
796 if (!drv->ops->change_virtual_intf ||
797 !(drv->wiphy.interface_modes & (1 << ntype))) {
798 err = -EOPNOTSUPP;
799 goto unlock;
800 }
801
802 if (info->attrs[NL80211_ATTR_MESH_ID]) {
803 if (ntype != NL80211_IFTYPE_MESH_POINT) {
804 err = -EINVAL;
805 goto unlock;
806 }
807 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
808 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
809 change = true;
810 }
811
812 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
813 if (ntype != NL80211_IFTYPE_MONITOR) {
814 err = -EINVAL;
815 goto unlock;
816 }
817 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
818 &_flags);
819 if (err)
820 goto unlock;
821
822 flags = &_flags;
823 change = true;
824 }
825
826 if (change)
827 err = drv->ops->change_virtual_intf(&drv->wiphy, dev,
828 ntype, flags, &params);
829 else
830 err = 0;
831
832 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
833
834 if (!err && (ntype != otype)) {
835 if (otype == NL80211_IFTYPE_ADHOC)
836 cfg80211_clear_ibss(dev, false);
837 }
838
839 unlock:
840 dev_put(dev);
841 cfg80211_put_dev(drv);
842 unlock_rtnl:
843 rtnl_unlock();
844 return err;
845 }
846
847 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
848 {
849 struct cfg80211_registered_device *drv;
850 struct vif_params params;
851 int err;
852 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
853 u32 flags;
854
855 memset(&params, 0, sizeof(params));
856
857 if (!info->attrs[NL80211_ATTR_IFNAME])
858 return -EINVAL;
859
860 if (info->attrs[NL80211_ATTR_IFTYPE]) {
861 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
862 if (type > NL80211_IFTYPE_MAX)
863 return -EINVAL;
864 }
865
866 rtnl_lock();
867
868 drv = cfg80211_get_dev_from_info(info);
869 if (IS_ERR(drv)) {
870 err = PTR_ERR(drv);
871 goto unlock_rtnl;
872 }
873
874 if (!drv->ops->add_virtual_intf ||
875 !(drv->wiphy.interface_modes & (1 << type))) {
876 err = -EOPNOTSUPP;
877 goto unlock;
878 }
879
880 if (type == NL80211_IFTYPE_MESH_POINT &&
881 info->attrs[NL80211_ATTR_MESH_ID]) {
882 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
883 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
884 }
885
886 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
887 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
888 &flags);
889 err = drv->ops->add_virtual_intf(&drv->wiphy,
890 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
891 type, err ? NULL : &flags, &params);
892
893 unlock:
894 cfg80211_put_dev(drv);
895 unlock_rtnl:
896 rtnl_unlock();
897 return err;
898 }
899
900 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
901 {
902 struct cfg80211_registered_device *drv;
903 int ifindex, err;
904 struct net_device *dev;
905
906 rtnl_lock();
907
908 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
909 if (err)
910 goto unlock_rtnl;
911 ifindex = dev->ifindex;
912 dev_put(dev);
913
914 if (!drv->ops->del_virtual_intf) {
915 err = -EOPNOTSUPP;
916 goto out;
917 }
918
919 err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
920
921 out:
922 cfg80211_put_dev(drv);
923 unlock_rtnl:
924 rtnl_unlock();
925 return err;
926 }
927
928 struct get_key_cookie {
929 struct sk_buff *msg;
930 int error;
931 };
932
933 static void get_key_callback(void *c, struct key_params *params)
934 {
935 struct get_key_cookie *cookie = c;
936
937 if (params->key)
938 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
939 params->key_len, params->key);
940
941 if (params->seq)
942 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
943 params->seq_len, params->seq);
944
945 if (params->cipher)
946 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
947 params->cipher);
948
949 return;
950 nla_put_failure:
951 cookie->error = 1;
952 }
953
954 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
955 {
956 struct cfg80211_registered_device *drv;
957 int err;
958 struct net_device *dev;
959 u8 key_idx = 0;
960 u8 *mac_addr = NULL;
961 struct get_key_cookie cookie = {
962 .error = 0,
963 };
964 void *hdr;
965 struct sk_buff *msg;
966
967 if (info->attrs[NL80211_ATTR_KEY_IDX])
968 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
969
970 if (key_idx > 5)
971 return -EINVAL;
972
973 if (info->attrs[NL80211_ATTR_MAC])
974 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
975
976 rtnl_lock();
977
978 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
979 if (err)
980 goto unlock_rtnl;
981
982 if (!drv->ops->get_key) {
983 err = -EOPNOTSUPP;
984 goto out;
985 }
986
987 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
988 if (!msg) {
989 err = -ENOMEM;
990 goto out;
991 }
992
993 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
994 NL80211_CMD_NEW_KEY);
995
996 if (IS_ERR(hdr)) {
997 err = PTR_ERR(hdr);
998 goto out;
999 }
1000
1001 cookie.msg = msg;
1002
1003 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1004 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1005 if (mac_addr)
1006 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1007
1008 err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
1009 &cookie, get_key_callback);
1010
1011 if (err)
1012 goto out;
1013
1014 if (cookie.error)
1015 goto nla_put_failure;
1016
1017 genlmsg_end(msg, hdr);
1018 err = genlmsg_unicast(msg, info->snd_pid);
1019 goto out;
1020
1021 nla_put_failure:
1022 err = -ENOBUFS;
1023 nlmsg_free(msg);
1024 out:
1025 cfg80211_put_dev(drv);
1026 dev_put(dev);
1027 unlock_rtnl:
1028 rtnl_unlock();
1029
1030 return err;
1031 }
1032
1033 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1034 {
1035 struct cfg80211_registered_device *drv;
1036 int err;
1037 struct net_device *dev;
1038 u8 key_idx;
1039 int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1040 u8 key_index);
1041
1042 if (!info->attrs[NL80211_ATTR_KEY_IDX])
1043 return -EINVAL;
1044
1045 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1046
1047 if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) {
1048 if (key_idx < 4 || key_idx > 5)
1049 return -EINVAL;
1050 } else if (key_idx > 3)
1051 return -EINVAL;
1052
1053 /* currently only support setting default key */
1054 if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] &&
1055 !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT])
1056 return -EINVAL;
1057
1058 rtnl_lock();
1059
1060 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1061 if (err)
1062 goto unlock_rtnl;
1063
1064 if (info->attrs[NL80211_ATTR_KEY_DEFAULT])
1065 func = drv->ops->set_default_key;
1066 else
1067 func = drv->ops->set_default_mgmt_key;
1068
1069 if (!func) {
1070 err = -EOPNOTSUPP;
1071 goto out;
1072 }
1073
1074 err = func(&drv->wiphy, dev, key_idx);
1075 #ifdef CONFIG_WIRELESS_EXT
1076 if (!err) {
1077 if (func == drv->ops->set_default_key)
1078 dev->ieee80211_ptr->wext.default_key = key_idx;
1079 else
1080 dev->ieee80211_ptr->wext.default_mgmt_key = key_idx;
1081 }
1082 #endif
1083
1084 out:
1085 cfg80211_put_dev(drv);
1086 dev_put(dev);
1087
1088 unlock_rtnl:
1089 rtnl_unlock();
1090
1091 return err;
1092 }
1093
1094 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1095 {
1096 struct cfg80211_registered_device *drv;
1097 int err, i;
1098 struct net_device *dev;
1099 struct key_params params;
1100 u8 key_idx = 0;
1101 u8 *mac_addr = NULL;
1102
1103 memset(&params, 0, sizeof(params));
1104
1105 if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
1106 return -EINVAL;
1107
1108 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
1109 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
1110 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
1111 }
1112
1113 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
1114 params.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
1115 params.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
1116 }
1117
1118 if (info->attrs[NL80211_ATTR_KEY_IDX])
1119 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1120
1121 params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
1122
1123 if (info->attrs[NL80211_ATTR_MAC])
1124 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1125
1126 if (cfg80211_validate_key_settings(&params, key_idx, mac_addr))
1127 return -EINVAL;
1128
1129 rtnl_lock();
1130
1131 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1132 if (err)
1133 goto unlock_rtnl;
1134
1135 for (i = 0; i < drv->wiphy.n_cipher_suites; i++)
1136 if (params.cipher == drv->wiphy.cipher_suites[i])
1137 break;
1138 if (i == drv->wiphy.n_cipher_suites) {
1139 err = -EINVAL;
1140 goto out;
1141 }
1142
1143 if (!drv->ops->add_key) {
1144 err = -EOPNOTSUPP;
1145 goto out;
1146 }
1147
1148 err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
1149
1150 out:
1151 cfg80211_put_dev(drv);
1152 dev_put(dev);
1153 unlock_rtnl:
1154 rtnl_unlock();
1155
1156 return err;
1157 }
1158
1159 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1160 {
1161 struct cfg80211_registered_device *drv;
1162 int err;
1163 struct net_device *dev;
1164 u8 key_idx = 0;
1165 u8 *mac_addr = NULL;
1166
1167 if (info->attrs[NL80211_ATTR_KEY_IDX])
1168 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1169
1170 if (key_idx > 5)
1171 return -EINVAL;
1172
1173 if (info->attrs[NL80211_ATTR_MAC])
1174 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1175
1176 rtnl_lock();
1177
1178 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1179 if (err)
1180 goto unlock_rtnl;
1181
1182 if (!drv->ops->del_key) {
1183 err = -EOPNOTSUPP;
1184 goto out;
1185 }
1186
1187 err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
1188
1189 #ifdef CONFIG_WIRELESS_EXT
1190 if (!err) {
1191 if (key_idx == dev->ieee80211_ptr->wext.default_key)
1192 dev->ieee80211_ptr->wext.default_key = -1;
1193 else if (key_idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1194 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1195 }
1196 #endif
1197
1198 out:
1199 cfg80211_put_dev(drv);
1200 dev_put(dev);
1201
1202 unlock_rtnl:
1203 rtnl_unlock();
1204
1205 return err;
1206 }
1207
1208 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1209 {
1210 int (*call)(struct wiphy *wiphy, struct net_device *dev,
1211 struct beacon_parameters *info);
1212 struct cfg80211_registered_device *drv;
1213 int err;
1214 struct net_device *dev;
1215 struct beacon_parameters params;
1216 int haveinfo = 0;
1217
1218 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1219 return -EINVAL;
1220
1221 rtnl_lock();
1222
1223 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1224 if (err)
1225 goto unlock_rtnl;
1226
1227 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1228 err = -EOPNOTSUPP;
1229 goto out;
1230 }
1231
1232 switch (info->genlhdr->cmd) {
1233 case NL80211_CMD_NEW_BEACON:
1234 /* these are required for NEW_BEACON */
1235 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1236 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1237 !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1238 err = -EINVAL;
1239 goto out;
1240 }
1241
1242 call = drv->ops->add_beacon;
1243 break;
1244 case NL80211_CMD_SET_BEACON:
1245 call = drv->ops->set_beacon;
1246 break;
1247 default:
1248 WARN_ON(1);
1249 err = -EOPNOTSUPP;
1250 goto out;
1251 }
1252
1253 if (!call) {
1254 err = -EOPNOTSUPP;
1255 goto out;
1256 }
1257
1258 memset(&params, 0, sizeof(params));
1259
1260 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1261 params.interval =
1262 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1263 haveinfo = 1;
1264 }
1265
1266 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1267 params.dtim_period =
1268 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1269 haveinfo = 1;
1270 }
1271
1272 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1273 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1274 params.head_len =
1275 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1276 haveinfo = 1;
1277 }
1278
1279 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1280 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1281 params.tail_len =
1282 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1283 haveinfo = 1;
1284 }
1285
1286 if (!haveinfo) {
1287 err = -EINVAL;
1288 goto out;
1289 }
1290
1291 err = call(&drv->wiphy, dev, &params);
1292
1293 out:
1294 cfg80211_put_dev(drv);
1295 dev_put(dev);
1296 unlock_rtnl:
1297 rtnl_unlock();
1298
1299 return err;
1300 }
1301
1302 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1303 {
1304 struct cfg80211_registered_device *drv;
1305 int err;
1306 struct net_device *dev;
1307
1308 rtnl_lock();
1309
1310 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1311 if (err)
1312 goto unlock_rtnl;
1313
1314 if (!drv->ops->del_beacon) {
1315 err = -EOPNOTSUPP;
1316 goto out;
1317 }
1318
1319 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1320 err = -EOPNOTSUPP;
1321 goto out;
1322 }
1323 err = drv->ops->del_beacon(&drv->wiphy, dev);
1324
1325 out:
1326 cfg80211_put_dev(drv);
1327 dev_put(dev);
1328 unlock_rtnl:
1329 rtnl_unlock();
1330
1331 return err;
1332 }
1333
1334 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1335 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1336 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1337 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1338 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1339 };
1340
1341 static int parse_station_flags(struct genl_info *info,
1342 struct station_parameters *params)
1343 {
1344 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1345 struct nlattr *nla;
1346 int flag;
1347
1348 /*
1349 * Try parsing the new attribute first so userspace
1350 * can specify both for older kernels.
1351 */
1352 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1353 if (nla) {
1354 struct nl80211_sta_flag_update *sta_flags;
1355
1356 sta_flags = nla_data(nla);
1357 params->sta_flags_mask = sta_flags->mask;
1358 params->sta_flags_set = sta_flags->set;
1359 if ((params->sta_flags_mask |
1360 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1361 return -EINVAL;
1362 return 0;
1363 }
1364
1365 /* if present, parse the old attribute */
1366
1367 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1368 if (!nla)
1369 return 0;
1370
1371 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1372 nla, sta_flags_policy))
1373 return -EINVAL;
1374
1375 params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1376 params->sta_flags_mask &= ~1;
1377
1378 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1379 if (flags[flag])
1380 params->sta_flags_set |= (1<<flag);
1381
1382 return 0;
1383 }
1384
1385 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1386 {
1387 int modulation, streams, bitrate;
1388
1389 if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1390 return rate->legacy;
1391
1392 /* the formula below does only work for MCS values smaller than 32 */
1393 if (rate->mcs >= 32)
1394 return 0;
1395
1396 modulation = rate->mcs & 7;
1397 streams = (rate->mcs >> 3) + 1;
1398
1399 bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1400 13500000 : 6500000;
1401
1402 if (modulation < 4)
1403 bitrate *= (modulation + 1);
1404 else if (modulation == 4)
1405 bitrate *= (modulation + 2);
1406 else
1407 bitrate *= (modulation + 3);
1408
1409 bitrate *= streams;
1410
1411 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1412 bitrate = (bitrate / 9) * 10;
1413
1414 /* do NOT round down here */
1415 return (bitrate + 50000) / 100000;
1416 }
1417
1418 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1419 int flags, struct net_device *dev,
1420 u8 *mac_addr, struct station_info *sinfo)
1421 {
1422 void *hdr;
1423 struct nlattr *sinfoattr, *txrate;
1424 u16 bitrate;
1425
1426 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1427 if (!hdr)
1428 return -1;
1429
1430 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1431 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1432
1433 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1434 if (!sinfoattr)
1435 goto nla_put_failure;
1436 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1437 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1438 sinfo->inactive_time);
1439 if (sinfo->filled & STATION_INFO_RX_BYTES)
1440 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1441 sinfo->rx_bytes);
1442 if (sinfo->filled & STATION_INFO_TX_BYTES)
1443 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1444 sinfo->tx_bytes);
1445 if (sinfo->filled & STATION_INFO_LLID)
1446 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1447 sinfo->llid);
1448 if (sinfo->filled & STATION_INFO_PLID)
1449 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1450 sinfo->plid);
1451 if (sinfo->filled & STATION_INFO_PLINK_STATE)
1452 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1453 sinfo->plink_state);
1454 if (sinfo->filled & STATION_INFO_SIGNAL)
1455 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1456 sinfo->signal);
1457 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1458 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1459 if (!txrate)
1460 goto nla_put_failure;
1461
1462 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1463 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1464 if (bitrate > 0)
1465 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1466
1467 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1468 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1469 sinfo->txrate.mcs);
1470 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1471 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1472 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1473 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1474
1475 nla_nest_end(msg, txrate);
1476 }
1477 if (sinfo->filled & STATION_INFO_RX_PACKETS)
1478 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1479 sinfo->rx_packets);
1480 if (sinfo->filled & STATION_INFO_TX_PACKETS)
1481 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1482 sinfo->tx_packets);
1483 nla_nest_end(msg, sinfoattr);
1484
1485 return genlmsg_end(msg, hdr);
1486
1487 nla_put_failure:
1488 genlmsg_cancel(msg, hdr);
1489 return -EMSGSIZE;
1490 }
1491
1492 static int nl80211_dump_station(struct sk_buff *skb,
1493 struct netlink_callback *cb)
1494 {
1495 struct station_info sinfo;
1496 struct cfg80211_registered_device *dev;
1497 struct net_device *netdev;
1498 u8 mac_addr[ETH_ALEN];
1499 int ifidx = cb->args[0];
1500 int sta_idx = cb->args[1];
1501 int err;
1502
1503 if (!ifidx) {
1504 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1505 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1506 nl80211_policy);
1507 if (err)
1508 return err;
1509
1510 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1511 return -EINVAL;
1512
1513 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1514 if (!ifidx)
1515 return -EINVAL;
1516 }
1517
1518 rtnl_lock();
1519
1520 netdev = __dev_get_by_index(&init_net, ifidx);
1521 if (!netdev) {
1522 err = -ENODEV;
1523 goto out_rtnl;
1524 }
1525
1526 dev = cfg80211_get_dev_from_ifindex(ifidx);
1527 if (IS_ERR(dev)) {
1528 err = PTR_ERR(dev);
1529 goto out_rtnl;
1530 }
1531
1532 if (!dev->ops->dump_station) {
1533 err = -EOPNOTSUPP;
1534 goto out_err;
1535 }
1536
1537 while (1) {
1538 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1539 mac_addr, &sinfo);
1540 if (err == -ENOENT)
1541 break;
1542 if (err)
1543 goto out_err;
1544
1545 if (nl80211_send_station(skb,
1546 NETLINK_CB(cb->skb).pid,
1547 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1548 netdev, mac_addr,
1549 &sinfo) < 0)
1550 goto out;
1551
1552 sta_idx++;
1553 }
1554
1555
1556 out:
1557 cb->args[1] = sta_idx;
1558 err = skb->len;
1559 out_err:
1560 cfg80211_put_dev(dev);
1561 out_rtnl:
1562 rtnl_unlock();
1563
1564 return err;
1565 }
1566
1567 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1568 {
1569 struct cfg80211_registered_device *drv;
1570 int err;
1571 struct net_device *dev;
1572 struct station_info sinfo;
1573 struct sk_buff *msg;
1574 u8 *mac_addr = NULL;
1575
1576 memset(&sinfo, 0, sizeof(sinfo));
1577
1578 if (!info->attrs[NL80211_ATTR_MAC])
1579 return -EINVAL;
1580
1581 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1582
1583 rtnl_lock();
1584
1585 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1586 if (err)
1587 goto out_rtnl;
1588
1589 if (!drv->ops->get_station) {
1590 err = -EOPNOTSUPP;
1591 goto out;
1592 }
1593
1594 err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1595 if (err)
1596 goto out;
1597
1598 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1599 if (!msg)
1600 goto out;
1601
1602 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1603 dev, mac_addr, &sinfo) < 0)
1604 goto out_free;
1605
1606 err = genlmsg_unicast(msg, info->snd_pid);
1607 goto out;
1608
1609 out_free:
1610 nlmsg_free(msg);
1611 out:
1612 cfg80211_put_dev(drv);
1613 dev_put(dev);
1614 out_rtnl:
1615 rtnl_unlock();
1616
1617 return err;
1618 }
1619
1620 /*
1621 * Get vlan interface making sure it is on the right wiphy.
1622 */
1623 static int get_vlan(struct nlattr *vlanattr,
1624 struct cfg80211_registered_device *rdev,
1625 struct net_device **vlan)
1626 {
1627 *vlan = NULL;
1628
1629 if (vlanattr) {
1630 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1631 if (!*vlan)
1632 return -ENODEV;
1633 if (!(*vlan)->ieee80211_ptr)
1634 return -EINVAL;
1635 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1636 return -EINVAL;
1637 }
1638 return 0;
1639 }
1640
1641 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1642 {
1643 struct cfg80211_registered_device *drv;
1644 int err;
1645 struct net_device *dev;
1646 struct station_parameters params;
1647 u8 *mac_addr = NULL;
1648
1649 memset(&params, 0, sizeof(params));
1650
1651 params.listen_interval = -1;
1652
1653 if (info->attrs[NL80211_ATTR_STA_AID])
1654 return -EINVAL;
1655
1656 if (!info->attrs[NL80211_ATTR_MAC])
1657 return -EINVAL;
1658
1659 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1660
1661 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1662 params.supported_rates =
1663 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1664 params.supported_rates_len =
1665 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1666 }
1667
1668 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1669 params.listen_interval =
1670 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1671
1672 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1673 params.ht_capa =
1674 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1675
1676 if (parse_station_flags(info, &params))
1677 return -EINVAL;
1678
1679 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1680 params.plink_action =
1681 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1682
1683 rtnl_lock();
1684
1685 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1686 if (err)
1687 goto out_rtnl;
1688
1689 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1690 if (err)
1691 goto out;
1692
1693 /* validate settings */
1694 err = 0;
1695
1696 switch (dev->ieee80211_ptr->iftype) {
1697 case NL80211_IFTYPE_AP:
1698 case NL80211_IFTYPE_AP_VLAN:
1699 /* disallow mesh-specific things */
1700 if (params.plink_action)
1701 err = -EINVAL;
1702 break;
1703 case NL80211_IFTYPE_STATION:
1704 /* disallow everything but AUTHORIZED flag */
1705 if (params.plink_action)
1706 err = -EINVAL;
1707 if (params.vlan)
1708 err = -EINVAL;
1709 if (params.supported_rates)
1710 err = -EINVAL;
1711 if (params.ht_capa)
1712 err = -EINVAL;
1713 if (params.listen_interval >= 0)
1714 err = -EINVAL;
1715 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1716 err = -EINVAL;
1717 break;
1718 case NL80211_IFTYPE_MESH_POINT:
1719 /* disallow things mesh doesn't support */
1720 if (params.vlan)
1721 err = -EINVAL;
1722 if (params.ht_capa)
1723 err = -EINVAL;
1724 if (params.listen_interval >= 0)
1725 err = -EINVAL;
1726 if (params.supported_rates)
1727 err = -EINVAL;
1728 if (params.sta_flags_mask)
1729 err = -EINVAL;
1730 break;
1731 default:
1732 err = -EINVAL;
1733 }
1734
1735 if (err)
1736 goto out;
1737
1738 if (!drv->ops->change_station) {
1739 err = -EOPNOTSUPP;
1740 goto out;
1741 }
1742
1743 err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1744
1745 out:
1746 if (params.vlan)
1747 dev_put(params.vlan);
1748 cfg80211_put_dev(drv);
1749 dev_put(dev);
1750 out_rtnl:
1751 rtnl_unlock();
1752
1753 return err;
1754 }
1755
1756 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1757 {
1758 struct cfg80211_registered_device *drv;
1759 int err;
1760 struct net_device *dev;
1761 struct station_parameters params;
1762 u8 *mac_addr = NULL;
1763
1764 memset(&params, 0, sizeof(params));
1765
1766 if (!info->attrs[NL80211_ATTR_MAC])
1767 return -EINVAL;
1768
1769 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1770 return -EINVAL;
1771
1772 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1773 return -EINVAL;
1774
1775 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1776 params.supported_rates =
1777 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1778 params.supported_rates_len =
1779 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1780 params.listen_interval =
1781 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1782
1783 if (info->attrs[NL80211_ATTR_STA_AID]) {
1784 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1785 if (!params.aid || params.aid > IEEE80211_MAX_AID)
1786 return -EINVAL;
1787 }
1788
1789 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1790 params.ht_capa =
1791 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1792
1793 if (parse_station_flags(info, &params))
1794 return -EINVAL;
1795
1796 rtnl_lock();
1797
1798 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1799 if (err)
1800 goto out_rtnl;
1801
1802 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1803 if (err)
1804 goto out;
1805
1806 /* validate settings */
1807 err = 0;
1808
1809 switch (dev->ieee80211_ptr->iftype) {
1810 case NL80211_IFTYPE_AP:
1811 case NL80211_IFTYPE_AP_VLAN:
1812 /* all ok but must have AID */
1813 if (!params.aid)
1814 err = -EINVAL;
1815 break;
1816 case NL80211_IFTYPE_MESH_POINT:
1817 /* disallow things mesh doesn't support */
1818 if (params.vlan)
1819 err = -EINVAL;
1820 if (params.aid)
1821 err = -EINVAL;
1822 if (params.ht_capa)
1823 err = -EINVAL;
1824 if (params.listen_interval >= 0)
1825 err = -EINVAL;
1826 if (params.supported_rates)
1827 err = -EINVAL;
1828 if (params.sta_flags_mask)
1829 err = -EINVAL;
1830 break;
1831 default:
1832 err = -EINVAL;
1833 }
1834
1835 if (err)
1836 goto out;
1837
1838 if (!drv->ops->add_station) {
1839 err = -EOPNOTSUPP;
1840 goto out;
1841 }
1842
1843 if (!netif_running(dev)) {
1844 err = -ENETDOWN;
1845 goto out;
1846 }
1847
1848 err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1849
1850 out:
1851 if (params.vlan)
1852 dev_put(params.vlan);
1853 cfg80211_put_dev(drv);
1854 dev_put(dev);
1855 out_rtnl:
1856 rtnl_unlock();
1857
1858 return err;
1859 }
1860
1861 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1862 {
1863 struct cfg80211_registered_device *drv;
1864 int err;
1865 struct net_device *dev;
1866 u8 *mac_addr = NULL;
1867
1868 if (info->attrs[NL80211_ATTR_MAC])
1869 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1870
1871 rtnl_lock();
1872
1873 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1874 if (err)
1875 goto out_rtnl;
1876
1877 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1878 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
1879 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1880 err = -EINVAL;
1881 goto out;
1882 }
1883
1884 if (!drv->ops->del_station) {
1885 err = -EOPNOTSUPP;
1886 goto out;
1887 }
1888
1889 err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1890
1891 out:
1892 cfg80211_put_dev(drv);
1893 dev_put(dev);
1894 out_rtnl:
1895 rtnl_unlock();
1896
1897 return err;
1898 }
1899
1900 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1901 int flags, struct net_device *dev,
1902 u8 *dst, u8 *next_hop,
1903 struct mpath_info *pinfo)
1904 {
1905 void *hdr;
1906 struct nlattr *pinfoattr;
1907
1908 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1909 if (!hdr)
1910 return -1;
1911
1912 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1913 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1914 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1915
1916 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1917 if (!pinfoattr)
1918 goto nla_put_failure;
1919 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1920 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1921 pinfo->frame_qlen);
1922 if (pinfo->filled & MPATH_INFO_DSN)
1923 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1924 pinfo->dsn);
1925 if (pinfo->filled & MPATH_INFO_METRIC)
1926 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1927 pinfo->metric);
1928 if (pinfo->filled & MPATH_INFO_EXPTIME)
1929 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1930 pinfo->exptime);
1931 if (pinfo->filled & MPATH_INFO_FLAGS)
1932 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1933 pinfo->flags);
1934 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1935 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1936 pinfo->discovery_timeout);
1937 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1938 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1939 pinfo->discovery_retries);
1940
1941 nla_nest_end(msg, pinfoattr);
1942
1943 return genlmsg_end(msg, hdr);
1944
1945 nla_put_failure:
1946 genlmsg_cancel(msg, hdr);
1947 return -EMSGSIZE;
1948 }
1949
1950 static int nl80211_dump_mpath(struct sk_buff *skb,
1951 struct netlink_callback *cb)
1952 {
1953 struct mpath_info pinfo;
1954 struct cfg80211_registered_device *dev;
1955 struct net_device *netdev;
1956 u8 dst[ETH_ALEN];
1957 u8 next_hop[ETH_ALEN];
1958 int ifidx = cb->args[0];
1959 int path_idx = cb->args[1];
1960 int err;
1961
1962 if (!ifidx) {
1963 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1964 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1965 nl80211_policy);
1966 if (err)
1967 return err;
1968
1969 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1970 return -EINVAL;
1971
1972 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1973 if (!ifidx)
1974 return -EINVAL;
1975 }
1976
1977 rtnl_lock();
1978
1979 netdev = __dev_get_by_index(&init_net, ifidx);
1980 if (!netdev) {
1981 err = -ENODEV;
1982 goto out_rtnl;
1983 }
1984
1985 dev = cfg80211_get_dev_from_ifindex(ifidx);
1986 if (IS_ERR(dev)) {
1987 err = PTR_ERR(dev);
1988 goto out_rtnl;
1989 }
1990
1991 if (!dev->ops->dump_mpath) {
1992 err = -EOPNOTSUPP;
1993 goto out_err;
1994 }
1995
1996 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1997 err = -EOPNOTSUPP;
1998 goto out;
1999 }
2000
2001 while (1) {
2002 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2003 dst, next_hop, &pinfo);
2004 if (err == -ENOENT)
2005 break;
2006 if (err)
2007 goto out_err;
2008
2009 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2010 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2011 netdev, dst, next_hop,
2012 &pinfo) < 0)
2013 goto out;
2014
2015 path_idx++;
2016 }
2017
2018
2019 out:
2020 cb->args[1] = path_idx;
2021 err = skb->len;
2022 out_err:
2023 cfg80211_put_dev(dev);
2024 out_rtnl:
2025 rtnl_unlock();
2026
2027 return err;
2028 }
2029
2030 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2031 {
2032 struct cfg80211_registered_device *drv;
2033 int err;
2034 struct net_device *dev;
2035 struct mpath_info pinfo;
2036 struct sk_buff *msg;
2037 u8 *dst = NULL;
2038 u8 next_hop[ETH_ALEN];
2039
2040 memset(&pinfo, 0, sizeof(pinfo));
2041
2042 if (!info->attrs[NL80211_ATTR_MAC])
2043 return -EINVAL;
2044
2045 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2046
2047 rtnl_lock();
2048
2049 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2050 if (err)
2051 goto out_rtnl;
2052
2053 if (!drv->ops->get_mpath) {
2054 err = -EOPNOTSUPP;
2055 goto out;
2056 }
2057
2058 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2059 err = -EOPNOTSUPP;
2060 goto out;
2061 }
2062
2063 err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
2064 if (err)
2065 goto out;
2066
2067 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2068 if (!msg)
2069 goto out;
2070
2071 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2072 dev, dst, next_hop, &pinfo) < 0)
2073 goto out_free;
2074
2075 err = genlmsg_unicast(msg, info->snd_pid);
2076 goto out;
2077
2078 out_free:
2079 nlmsg_free(msg);
2080 out:
2081 cfg80211_put_dev(drv);
2082 dev_put(dev);
2083 out_rtnl:
2084 rtnl_unlock();
2085
2086 return err;
2087 }
2088
2089 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2090 {
2091 struct cfg80211_registered_device *drv;
2092 int err;
2093 struct net_device *dev;
2094 u8 *dst = NULL;
2095 u8 *next_hop = NULL;
2096
2097 if (!info->attrs[NL80211_ATTR_MAC])
2098 return -EINVAL;
2099
2100 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2101 return -EINVAL;
2102
2103 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2104 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2105
2106 rtnl_lock();
2107
2108 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2109 if (err)
2110 goto out_rtnl;
2111
2112 if (!drv->ops->change_mpath) {
2113 err = -EOPNOTSUPP;
2114 goto out;
2115 }
2116
2117 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2118 err = -EOPNOTSUPP;
2119 goto out;
2120 }
2121
2122 if (!netif_running(dev)) {
2123 err = -ENETDOWN;
2124 goto out;
2125 }
2126
2127 err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
2128
2129 out:
2130 cfg80211_put_dev(drv);
2131 dev_put(dev);
2132 out_rtnl:
2133 rtnl_unlock();
2134
2135 return err;
2136 }
2137 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2138 {
2139 struct cfg80211_registered_device *drv;
2140 int err;
2141 struct net_device *dev;
2142 u8 *dst = NULL;
2143 u8 *next_hop = NULL;
2144
2145 if (!info->attrs[NL80211_ATTR_MAC])
2146 return -EINVAL;
2147
2148 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2149 return -EINVAL;
2150
2151 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2152 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2153
2154 rtnl_lock();
2155
2156 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2157 if (err)
2158 goto out_rtnl;
2159
2160 if (!drv->ops->add_mpath) {
2161 err = -EOPNOTSUPP;
2162 goto out;
2163 }
2164
2165 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2166 err = -EOPNOTSUPP;
2167 goto out;
2168 }
2169
2170 if (!netif_running(dev)) {
2171 err = -ENETDOWN;
2172 goto out;
2173 }
2174
2175 err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
2176
2177 out:
2178 cfg80211_put_dev(drv);
2179 dev_put(dev);
2180 out_rtnl:
2181 rtnl_unlock();
2182
2183 return err;
2184 }
2185
2186 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2187 {
2188 struct cfg80211_registered_device *drv;
2189 int err;
2190 struct net_device *dev;
2191 u8 *dst = NULL;
2192
2193 if (info->attrs[NL80211_ATTR_MAC])
2194 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2195
2196 rtnl_lock();
2197
2198 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2199 if (err)
2200 goto out_rtnl;
2201
2202 if (!drv->ops->del_mpath) {
2203 err = -EOPNOTSUPP;
2204 goto out;
2205 }
2206
2207 err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
2208
2209 out:
2210 cfg80211_put_dev(drv);
2211 dev_put(dev);
2212 out_rtnl:
2213 rtnl_unlock();
2214
2215 return err;
2216 }
2217
2218 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2219 {
2220 struct cfg80211_registered_device *drv;
2221 int err;
2222 struct net_device *dev;
2223 struct bss_parameters params;
2224
2225 memset(&params, 0, sizeof(params));
2226 /* default to not changing parameters */
2227 params.use_cts_prot = -1;
2228 params.use_short_preamble = -1;
2229 params.use_short_slot_time = -1;
2230
2231 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2232 params.use_cts_prot =
2233 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2234 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2235 params.use_short_preamble =
2236 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2237 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2238 params.use_short_slot_time =
2239 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2240 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2241 params.basic_rates =
2242 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2243 params.basic_rates_len =
2244 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2245 }
2246
2247 rtnl_lock();
2248
2249 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2250 if (err)
2251 goto out_rtnl;
2252
2253 if (!drv->ops->change_bss) {
2254 err = -EOPNOTSUPP;
2255 goto out;
2256 }
2257
2258 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2259 err = -EOPNOTSUPP;
2260 goto out;
2261 }
2262
2263 err = drv->ops->change_bss(&drv->wiphy, dev, &params);
2264
2265 out:
2266 cfg80211_put_dev(drv);
2267 dev_put(dev);
2268 out_rtnl:
2269 rtnl_unlock();
2270
2271 return err;
2272 }
2273
2274 static const struct nla_policy
2275 reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2276 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
2277 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
2278 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
2279 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
2280 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
2281 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
2282 };
2283
2284 static int parse_reg_rule(struct nlattr *tb[],
2285 struct ieee80211_reg_rule *reg_rule)
2286 {
2287 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2288 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2289
2290 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2291 return -EINVAL;
2292 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2293 return -EINVAL;
2294 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2295 return -EINVAL;
2296 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2297 return -EINVAL;
2298 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2299 return -EINVAL;
2300
2301 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2302
2303 freq_range->start_freq_khz =
2304 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2305 freq_range->end_freq_khz =
2306 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2307 freq_range->max_bandwidth_khz =
2308 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2309
2310 power_rule->max_eirp =
2311 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2312
2313 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2314 power_rule->max_antenna_gain =
2315 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2316
2317 return 0;
2318 }
2319
2320 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2321 {
2322 int r;
2323 char *data = NULL;
2324
2325 /*
2326 * You should only get this when cfg80211 hasn't yet initialized
2327 * completely when built-in to the kernel right between the time
2328 * window between nl80211_init() and regulatory_init(), if that is
2329 * even possible.
2330 */
2331 mutex_lock(&cfg80211_mutex);
2332 if (unlikely(!cfg80211_regdomain)) {
2333 mutex_unlock(&cfg80211_mutex);
2334 return -EINPROGRESS;
2335 }
2336 mutex_unlock(&cfg80211_mutex);
2337
2338 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2339 return -EINVAL;
2340
2341 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2342
2343 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2344 /* We ignore world regdom requests with the old regdom setup */
2345 if (is_world_regdom(data))
2346 return -EINVAL;
2347 #endif
2348
2349 r = regulatory_hint_user(data);
2350
2351 return r;
2352 }
2353
2354 static int nl80211_get_mesh_params(struct sk_buff *skb,
2355 struct genl_info *info)
2356 {
2357 struct cfg80211_registered_device *drv;
2358 struct mesh_config cur_params;
2359 int err;
2360 struct net_device *dev;
2361 void *hdr;
2362 struct nlattr *pinfoattr;
2363 struct sk_buff *msg;
2364
2365 rtnl_lock();
2366
2367 /* Look up our device */
2368 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2369 if (err)
2370 goto out_rtnl;
2371
2372 if (!drv->ops->get_mesh_params) {
2373 err = -EOPNOTSUPP;
2374 goto out;
2375 }
2376
2377 /* Get the mesh params */
2378 err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params);
2379 if (err)
2380 goto out;
2381
2382 /* Draw up a netlink message to send back */
2383 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2384 if (!msg) {
2385 err = -ENOBUFS;
2386 goto out;
2387 }
2388 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2389 NL80211_CMD_GET_MESH_PARAMS);
2390 if (!hdr)
2391 goto nla_put_failure;
2392 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2393 if (!pinfoattr)
2394 goto nla_put_failure;
2395 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2396 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2397 cur_params.dot11MeshRetryTimeout);
2398 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2399 cur_params.dot11MeshConfirmTimeout);
2400 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2401 cur_params.dot11MeshHoldingTimeout);
2402 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2403 cur_params.dot11MeshMaxPeerLinks);
2404 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2405 cur_params.dot11MeshMaxRetries);
2406 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2407 cur_params.dot11MeshTTL);
2408 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2409 cur_params.auto_open_plinks);
2410 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2411 cur_params.dot11MeshHWMPmaxPREQretries);
2412 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2413 cur_params.path_refresh_time);
2414 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2415 cur_params.min_discovery_timeout);
2416 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2417 cur_params.dot11MeshHWMPactivePathTimeout);
2418 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2419 cur_params.dot11MeshHWMPpreqMinInterval);
2420 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2421 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2422 nla_nest_end(msg, pinfoattr);
2423 genlmsg_end(msg, hdr);
2424 err = genlmsg_unicast(msg, info->snd_pid);
2425 goto out;
2426
2427 nla_put_failure:
2428 genlmsg_cancel(msg, hdr);
2429 err = -EMSGSIZE;
2430 out:
2431 /* Cleanup */
2432 cfg80211_put_dev(drv);
2433 dev_put(dev);
2434 out_rtnl:
2435 rtnl_unlock();
2436
2437 return err;
2438 }
2439
2440 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2441 do {\
2442 if (table[attr_num]) {\
2443 cfg.param = nla_fn(table[attr_num]); \
2444 mask |= (1 << (attr_num - 1)); \
2445 } \
2446 } while (0);\
2447
2448 static struct nla_policy
2449 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2450 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2451 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2452 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2453 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2454 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2455 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2456 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2457
2458 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2459 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2460 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2461 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2462 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2463 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2464 };
2465
2466 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2467 {
2468 int err;
2469 u32 mask;
2470 struct cfg80211_registered_device *drv;
2471 struct net_device *dev;
2472 struct mesh_config cfg;
2473 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2474 struct nlattr *parent_attr;
2475
2476 parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2477 if (!parent_attr)
2478 return -EINVAL;
2479 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2480 parent_attr, nl80211_meshconf_params_policy))
2481 return -EINVAL;
2482
2483 rtnl_lock();
2484
2485 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2486 if (err)
2487 goto out_rtnl;
2488
2489 if (!drv->ops->set_mesh_params) {
2490 err = -EOPNOTSUPP;
2491 goto out;
2492 }
2493
2494 /* This makes sure that there aren't more than 32 mesh config
2495 * parameters (otherwise our bitfield scheme would not work.) */
2496 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2497
2498 /* Fill in the params struct */
2499 mask = 0;
2500 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2501 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2502 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2503 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2504 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2505 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2506 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2507 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2508 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2509 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2510 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2511 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2512 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2513 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2514 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2515 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2516 nla_get_u8);
2517 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2518 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2519 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2520 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2521 nla_get_u16);
2522 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2523 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2524 nla_get_u32);
2525 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2526 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2527 nla_get_u16);
2528 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2529 dot11MeshHWMPnetDiameterTraversalTime,
2530 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2531 nla_get_u16);
2532
2533 /* Apply changes */
2534 err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask);
2535
2536 out:
2537 /* cleanup */
2538 cfg80211_put_dev(drv);
2539 dev_put(dev);
2540 out_rtnl:
2541 rtnl_unlock();
2542
2543 return err;
2544 }
2545
2546 #undef FILL_IN_MESH_PARAM_IF_SET
2547
2548 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2549 {
2550 struct sk_buff *msg;
2551 void *hdr = NULL;
2552 struct nlattr *nl_reg_rules;
2553 unsigned int i;
2554 int err = -EINVAL;
2555
2556 mutex_lock(&cfg80211_mutex);
2557
2558 if (!cfg80211_regdomain)
2559 goto out;
2560
2561 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2562 if (!msg) {
2563 err = -ENOBUFS;
2564 goto out;
2565 }
2566
2567 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2568 NL80211_CMD_GET_REG);
2569 if (!hdr)
2570 goto nla_put_failure;
2571
2572 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2573 cfg80211_regdomain->alpha2);
2574
2575 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2576 if (!nl_reg_rules)
2577 goto nla_put_failure;
2578
2579 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2580 struct nlattr *nl_reg_rule;
2581 const struct ieee80211_reg_rule *reg_rule;
2582 const struct ieee80211_freq_range *freq_range;
2583 const struct ieee80211_power_rule *power_rule;
2584
2585 reg_rule = &cfg80211_regdomain->reg_rules[i];
2586 freq_range = &reg_rule->freq_range;
2587 power_rule = &reg_rule->power_rule;
2588
2589 nl_reg_rule = nla_nest_start(msg, i);
2590 if (!nl_reg_rule)
2591 goto nla_put_failure;
2592
2593 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2594 reg_rule->flags);
2595 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2596 freq_range->start_freq_khz);
2597 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2598 freq_range->end_freq_khz);
2599 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2600 freq_range->max_bandwidth_khz);
2601 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2602 power_rule->max_antenna_gain);
2603 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2604 power_rule->max_eirp);
2605
2606 nla_nest_end(msg, nl_reg_rule);
2607 }
2608
2609 nla_nest_end(msg, nl_reg_rules);
2610
2611 genlmsg_end(msg, hdr);
2612 err = genlmsg_unicast(msg, info->snd_pid);
2613 goto out;
2614
2615 nla_put_failure:
2616 genlmsg_cancel(msg, hdr);
2617 err = -EMSGSIZE;
2618 out:
2619 mutex_unlock(&cfg80211_mutex);
2620 return err;
2621 }
2622
2623 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2624 {
2625 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2626 struct nlattr *nl_reg_rule;
2627 char *alpha2 = NULL;
2628 int rem_reg_rules = 0, r = 0;
2629 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2630 struct ieee80211_regdomain *rd = NULL;
2631
2632 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2633 return -EINVAL;
2634
2635 if (!info->attrs[NL80211_ATTR_REG_RULES])
2636 return -EINVAL;
2637
2638 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2639
2640 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2641 rem_reg_rules) {
2642 num_rules++;
2643 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2644 return -EINVAL;
2645 }
2646
2647 mutex_lock(&cfg80211_mutex);
2648
2649 if (!reg_is_valid_request(alpha2)) {
2650 r = -EINVAL;
2651 goto bad_reg;
2652 }
2653
2654 size_of_regd = sizeof(struct ieee80211_regdomain) +
2655 (num_rules * sizeof(struct ieee80211_reg_rule));
2656
2657 rd = kzalloc(size_of_regd, GFP_KERNEL);
2658 if (!rd) {
2659 r = -ENOMEM;
2660 goto bad_reg;
2661 }
2662
2663 rd->n_reg_rules = num_rules;
2664 rd->alpha2[0] = alpha2[0];
2665 rd->alpha2[1] = alpha2[1];
2666
2667 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2668 rem_reg_rules) {
2669 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2670 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2671 reg_rule_policy);
2672 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2673 if (r)
2674 goto bad_reg;
2675
2676 rule_idx++;
2677
2678 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2679 r = -EINVAL;
2680 goto bad_reg;
2681 }
2682 }
2683
2684 BUG_ON(rule_idx != num_rules);
2685
2686 r = set_regdom(rd);
2687
2688 mutex_unlock(&cfg80211_mutex);
2689
2690 return r;
2691
2692 bad_reg:
2693 mutex_unlock(&cfg80211_mutex);
2694 kfree(rd);
2695 return r;
2696 }
2697
2698 static int validate_scan_freqs(struct nlattr *freqs)
2699 {
2700 struct nlattr *attr1, *attr2;
2701 int n_channels = 0, tmp1, tmp2;
2702
2703 nla_for_each_nested(attr1, freqs, tmp1) {
2704 n_channels++;
2705 /*
2706 * Some hardware has a limited channel list for
2707 * scanning, and it is pretty much nonsensical
2708 * to scan for a channel twice, so disallow that
2709 * and don't require drivers to check that the
2710 * channel list they get isn't longer than what
2711 * they can scan, as long as they can scan all
2712 * the channels they registered at once.
2713 */
2714 nla_for_each_nested(attr2, freqs, tmp2)
2715 if (attr1 != attr2 &&
2716 nla_get_u32(attr1) == nla_get_u32(attr2))
2717 return 0;
2718 }
2719
2720 return n_channels;
2721 }
2722
2723 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2724 {
2725 struct cfg80211_registered_device *drv;
2726 struct net_device *dev;
2727 struct cfg80211_scan_request *request;
2728 struct cfg80211_ssid *ssid;
2729 struct ieee80211_channel *channel;
2730 struct nlattr *attr;
2731 struct wiphy *wiphy;
2732 int err, tmp, n_ssids = 0, n_channels, i;
2733 enum ieee80211_band band;
2734 size_t ie_len;
2735
2736 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2737 return -EINVAL;
2738
2739 rtnl_lock();
2740
2741 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2742 if (err)
2743 goto out_rtnl;
2744
2745 wiphy = &drv->wiphy;
2746
2747 if (!drv->ops->scan) {
2748 err = -EOPNOTSUPP;
2749 goto out;
2750 }
2751
2752 if (!netif_running(dev)) {
2753 err = -ENETDOWN;
2754 goto out;
2755 }
2756
2757 if (drv->scan_req) {
2758 err = -EBUSY;
2759 goto out;
2760 }
2761
2762 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2763 n_channels = validate_scan_freqs(
2764 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2765 if (!n_channels) {
2766 err = -EINVAL;
2767 goto out;
2768 }
2769 } else {
2770 n_channels = 0;
2771
2772 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2773 if (wiphy->bands[band])
2774 n_channels += wiphy->bands[band]->n_channels;
2775 }
2776
2777 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2778 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2779 n_ssids++;
2780
2781 if (n_ssids > wiphy->max_scan_ssids) {
2782 err = -EINVAL;
2783 goto out;
2784 }
2785
2786 if (info->attrs[NL80211_ATTR_IE])
2787 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2788 else
2789 ie_len = 0;
2790
2791 if (ie_len > wiphy->max_scan_ie_len) {
2792 err = -EINVAL;
2793 goto out;
2794 }
2795
2796 request = kzalloc(sizeof(*request)
2797 + sizeof(*ssid) * n_ssids
2798 + sizeof(channel) * n_channels
2799 + ie_len, GFP_KERNEL);
2800 if (!request) {
2801 err = -ENOMEM;
2802 goto out;
2803 }
2804
2805 request->channels = (void *)((char *)request + sizeof(*request));
2806 request->n_channels = n_channels;
2807 if (n_ssids)
2808 request->ssids = (void *)(request->channels + n_channels);
2809 request->n_ssids = n_ssids;
2810 if (ie_len) {
2811 if (request->ssids)
2812 request->ie = (void *)(request->ssids + n_ssids);
2813 else
2814 request->ie = (void *)(request->channels + n_channels);
2815 }
2816
2817 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2818 /* user specified, bail out if channel not found */
2819 request->n_channels = n_channels;
2820 i = 0;
2821 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2822 request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2823 if (!request->channels[i]) {
2824 err = -EINVAL;
2825 goto out_free;
2826 }
2827 i++;
2828 }
2829 } else {
2830 /* all channels */
2831 i = 0;
2832 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2833 int j;
2834 if (!wiphy->bands[band])
2835 continue;
2836 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2837 request->channels[i] = &wiphy->bands[band]->channels[j];
2838 i++;
2839 }
2840 }
2841 }
2842
2843 i = 0;
2844 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2845 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2846 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2847 err = -EINVAL;
2848 goto out_free;
2849 }
2850 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2851 request->ssids[i].ssid_len = nla_len(attr);
2852 i++;
2853 }
2854 }
2855
2856 if (info->attrs[NL80211_ATTR_IE]) {
2857 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2858 memcpy((void *)request->ie,
2859 nla_data(info->attrs[NL80211_ATTR_IE]),
2860 request->ie_len);
2861 }
2862
2863 request->ifidx = dev->ifindex;
2864 request->wiphy = &drv->wiphy;
2865
2866 drv->scan_req = request;
2867 err = drv->ops->scan(&drv->wiphy, dev, request);
2868
2869 if (!err)
2870 nl80211_send_scan_start(drv, dev);
2871
2872 out_free:
2873 if (err) {
2874 drv->scan_req = NULL;
2875 kfree(request);
2876 }
2877 out:
2878 cfg80211_put_dev(drv);
2879 dev_put(dev);
2880 out_rtnl:
2881 rtnl_unlock();
2882
2883 return err;
2884 }
2885
2886 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
2887 struct cfg80211_registered_device *rdev,
2888 struct net_device *dev,
2889 struct cfg80211_bss *res)
2890 {
2891 void *hdr;
2892 struct nlattr *bss;
2893
2894 hdr = nl80211hdr_put(msg, pid, seq, flags,
2895 NL80211_CMD_NEW_SCAN_RESULTS);
2896 if (!hdr)
2897 return -1;
2898
2899 NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
2900 rdev->bss_generation);
2901 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2902
2903 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
2904 if (!bss)
2905 goto nla_put_failure;
2906 if (!is_zero_ether_addr(res->bssid))
2907 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
2908 if (res->information_elements && res->len_information_elements)
2909 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
2910 res->len_information_elements,
2911 res->information_elements);
2912 if (res->tsf)
2913 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
2914 if (res->beacon_interval)
2915 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
2916 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
2917 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
2918
2919 switch (rdev->wiphy.signal_type) {
2920 case CFG80211_SIGNAL_TYPE_MBM:
2921 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
2922 break;
2923 case CFG80211_SIGNAL_TYPE_UNSPEC:
2924 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
2925 break;
2926 default:
2927 break;
2928 }
2929
2930 nla_nest_end(msg, bss);
2931
2932 return genlmsg_end(msg, hdr);
2933
2934 nla_put_failure:
2935 genlmsg_cancel(msg, hdr);
2936 return -EMSGSIZE;
2937 }
2938
2939 static int nl80211_dump_scan(struct sk_buff *skb,
2940 struct netlink_callback *cb)
2941 {
2942 struct cfg80211_registered_device *dev;
2943 struct net_device *netdev;
2944 struct cfg80211_internal_bss *scan;
2945 int ifidx = cb->args[0];
2946 int start = cb->args[1], idx = 0;
2947 int err;
2948
2949 if (!ifidx) {
2950 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2951 nl80211_fam.attrbuf, nl80211_fam.maxattr,
2952 nl80211_policy);
2953 if (err)
2954 return err;
2955
2956 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2957 return -EINVAL;
2958
2959 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2960 if (!ifidx)
2961 return -EINVAL;
2962 cb->args[0] = ifidx;
2963 }
2964
2965 netdev = dev_get_by_index(&init_net, ifidx);
2966 if (!netdev)
2967 return -ENODEV;
2968
2969 dev = cfg80211_get_dev_from_ifindex(ifidx);
2970 if (IS_ERR(dev)) {
2971 err = PTR_ERR(dev);
2972 goto out_put_netdev;
2973 }
2974
2975 spin_lock_bh(&dev->bss_lock);
2976 cfg80211_bss_expire(dev);
2977
2978 list_for_each_entry(scan, &dev->bss_list, list) {
2979 if (++idx <= start)
2980 continue;
2981 if (nl80211_send_bss(skb,
2982 NETLINK_CB(cb->skb).pid,
2983 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2984 dev, netdev, &scan->pub) < 0) {
2985 idx--;
2986 goto out;
2987 }
2988 }
2989
2990 out:
2991 spin_unlock_bh(&dev->bss_lock);
2992
2993 cb->args[1] = idx;
2994 err = skb->len;
2995 cfg80211_put_dev(dev);
2996 out_put_netdev:
2997 dev_put(netdev);
2998
2999 return err;
3000 }
3001
3002 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3003 {
3004 return auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM ||
3005 auth_type == NL80211_AUTHTYPE_SHARED_KEY ||
3006 auth_type == NL80211_AUTHTYPE_FT ||
3007 auth_type == NL80211_AUTHTYPE_NETWORK_EAP;
3008 }
3009
3010 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3011 {
3012 struct cfg80211_registered_device *drv;
3013 struct net_device *dev;
3014 struct cfg80211_auth_request req;
3015 struct wiphy *wiphy;
3016 int err;
3017
3018 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3019 return -EINVAL;
3020
3021 if (!info->attrs[NL80211_ATTR_MAC])
3022 return -EINVAL;
3023
3024 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3025 return -EINVAL;
3026
3027 rtnl_lock();
3028
3029 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3030 if (err)
3031 goto unlock_rtnl;
3032
3033 if (!drv->ops->auth) {
3034 err = -EOPNOTSUPP;
3035 goto out;
3036 }
3037
3038 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3039 err = -EOPNOTSUPP;
3040 goto out;
3041 }
3042
3043 if (!netif_running(dev)) {
3044 err = -ENETDOWN;
3045 goto out;
3046 }
3047
3048 wiphy = &drv->wiphy;
3049 memset(&req, 0, sizeof(req));
3050
3051 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3052
3053 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3054 req.chan = ieee80211_get_channel(
3055 wiphy,
3056 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3057 if (!req.chan) {
3058 err = -EINVAL;
3059 goto out;
3060 }
3061 }
3062
3063 if (info->attrs[NL80211_ATTR_SSID]) {
3064 req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3065 req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3066 }
3067
3068 if (info->attrs[NL80211_ATTR_IE]) {
3069 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3070 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3071 }
3072
3073 req.auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3074 if (!nl80211_valid_auth_type(req.auth_type)) {
3075 err = -EINVAL;
3076 goto out;
3077 }
3078
3079 err = drv->ops->auth(&drv->wiphy, dev, &req);
3080
3081 out:
3082 cfg80211_put_dev(drv);
3083 dev_put(dev);
3084 unlock_rtnl:
3085 rtnl_unlock();
3086 return err;
3087 }
3088
3089 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3090 {
3091 struct cfg80211_registered_device *drv;
3092 struct net_device *dev;
3093 struct cfg80211_assoc_request req;
3094 struct wiphy *wiphy;
3095 int err;
3096
3097 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3098 return -EINVAL;
3099
3100 if (!info->attrs[NL80211_ATTR_MAC] ||
3101 !info->attrs[NL80211_ATTR_SSID])
3102 return -EINVAL;
3103
3104 rtnl_lock();
3105
3106 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3107 if (err)
3108 goto unlock_rtnl;
3109
3110 if (!drv->ops->assoc) {
3111 err = -EOPNOTSUPP;
3112 goto out;
3113 }
3114
3115 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3116 err = -EOPNOTSUPP;
3117 goto out;
3118 }
3119
3120 if (!netif_running(dev)) {
3121 err = -ENETDOWN;
3122 goto out;
3123 }
3124
3125 wiphy = &drv->wiphy;
3126 memset(&req, 0, sizeof(req));
3127
3128 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3129
3130 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3131 req.chan = ieee80211_get_channel(
3132 wiphy,
3133 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3134 if (!req.chan) {
3135 err = -EINVAL;
3136 goto out;
3137 }
3138 }
3139
3140 req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3141 req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3142
3143 if (info->attrs[NL80211_ATTR_IE]) {
3144 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3145 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3146 }
3147
3148 if (info->attrs[NL80211_ATTR_USE_MFP]) {
3149 enum nl80211_mfp use_mfp =
3150 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3151 if (use_mfp == NL80211_MFP_REQUIRED)
3152 req.use_mfp = true;
3153 else if (use_mfp != NL80211_MFP_NO) {
3154 err = -EINVAL;
3155 goto out;
3156 }
3157 }
3158
3159 req.control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3160
3161 err = drv->ops->assoc(&drv->wiphy, dev, &req);
3162
3163 out:
3164 cfg80211_put_dev(drv);
3165 dev_put(dev);
3166 unlock_rtnl:
3167 rtnl_unlock();
3168 return err;
3169 }
3170
3171 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3172 {
3173 struct cfg80211_registered_device *drv;
3174 struct net_device *dev;
3175 struct cfg80211_deauth_request req;
3176 struct wiphy *wiphy;
3177 int err;
3178
3179 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3180 return -EINVAL;
3181
3182 if (!info->attrs[NL80211_ATTR_MAC])
3183 return -EINVAL;
3184
3185 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3186 return -EINVAL;
3187
3188 rtnl_lock();
3189
3190 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3191 if (err)
3192 goto unlock_rtnl;
3193
3194 if (!drv->ops->deauth) {
3195 err = -EOPNOTSUPP;
3196 goto out;
3197 }
3198
3199 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3200 err = -EOPNOTSUPP;
3201 goto out;
3202 }
3203
3204 if (!netif_running(dev)) {
3205 err = -ENETDOWN;
3206 goto out;
3207 }
3208
3209 wiphy = &drv->wiphy;
3210 memset(&req, 0, sizeof(req));
3211
3212 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3213
3214 req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3215 if (req.reason_code == 0) {
3216 /* Reason Code 0 is reserved */
3217 err = -EINVAL;
3218 goto out;
3219 }
3220
3221 if (info->attrs[NL80211_ATTR_IE]) {
3222 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3223 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3224 }
3225
3226 err = drv->ops->deauth(&drv->wiphy, dev, &req);
3227
3228 out:
3229 cfg80211_put_dev(drv);
3230 dev_put(dev);
3231 unlock_rtnl:
3232 rtnl_unlock();
3233 return err;
3234 }
3235
3236 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3237 {
3238 struct cfg80211_registered_device *drv;
3239 struct net_device *dev;
3240 struct cfg80211_disassoc_request req;
3241 struct wiphy *wiphy;
3242 int err;
3243
3244 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3245 return -EINVAL;
3246
3247 if (!info->attrs[NL80211_ATTR_MAC])
3248 return -EINVAL;
3249
3250 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3251 return -EINVAL;
3252
3253 rtnl_lock();
3254
3255 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3256 if (err)
3257 goto unlock_rtnl;
3258
3259 if (!drv->ops->disassoc) {
3260 err = -EOPNOTSUPP;
3261 goto out;
3262 }
3263
3264 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3265 err = -EOPNOTSUPP;
3266 goto out;
3267 }
3268
3269 if (!netif_running(dev)) {
3270 err = -ENETDOWN;
3271 goto out;
3272 }
3273
3274 wiphy = &drv->wiphy;
3275 memset(&req, 0, sizeof(req));
3276
3277 req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3278
3279 req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3280 if (req.reason_code == 0) {
3281 /* Reason Code 0 is reserved */
3282 err = -EINVAL;
3283 goto out;
3284 }
3285
3286 if (info->attrs[NL80211_ATTR_IE]) {
3287 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3288 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3289 }
3290
3291 err = drv->ops->disassoc(&drv->wiphy, dev, &req);
3292
3293 out:
3294 cfg80211_put_dev(drv);
3295 dev_put(dev);
3296 unlock_rtnl:
3297 rtnl_unlock();
3298 return err;
3299 }
3300
3301 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3302 {
3303 struct cfg80211_registered_device *drv;
3304 struct net_device *dev;
3305 struct cfg80211_ibss_params ibss;
3306 struct wiphy *wiphy;
3307 int err;
3308
3309 memset(&ibss, 0, sizeof(ibss));
3310
3311 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3312 return -EINVAL;
3313
3314 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3315 !info->attrs[NL80211_ATTR_SSID] ||
3316 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3317 return -EINVAL;
3318
3319 ibss.beacon_interval = 100;
3320
3321 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3322 ibss.beacon_interval =
3323 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3324 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3325 return -EINVAL;
3326 }
3327
3328 rtnl_lock();
3329
3330 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3331 if (err)
3332 goto unlock_rtnl;
3333
3334 if (!drv->ops->join_ibss) {
3335 err = -EOPNOTSUPP;
3336 goto out;
3337 }
3338
3339 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3340 err = -EOPNOTSUPP;
3341 goto out;
3342 }
3343
3344 if (!netif_running(dev)) {
3345 err = -ENETDOWN;
3346 goto out;
3347 }
3348
3349 wiphy = &drv->wiphy;
3350
3351 if (info->attrs[NL80211_ATTR_MAC])
3352 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3353 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3354 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3355
3356 if (info->attrs[NL80211_ATTR_IE]) {
3357 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3358 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3359 }
3360
3361 ibss.channel = ieee80211_get_channel(wiphy,
3362 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3363 if (!ibss.channel ||
3364 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3365 ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3366 err = -EINVAL;
3367 goto out;
3368 }
3369
3370 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3371
3372 err = cfg80211_join_ibss(drv, dev, &ibss);
3373
3374 out:
3375 cfg80211_put_dev(drv);
3376 dev_put(dev);
3377 unlock_rtnl:
3378 rtnl_unlock();
3379 return err;
3380 }
3381
3382 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3383 {
3384 struct cfg80211_registered_device *drv;
3385 struct net_device *dev;
3386 int err;
3387
3388 rtnl_lock();
3389
3390 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3391 if (err)
3392 goto unlock_rtnl;
3393
3394 if (!drv->ops->leave_ibss) {
3395 err = -EOPNOTSUPP;
3396 goto out;
3397 }
3398
3399 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3400 err = -EOPNOTSUPP;
3401 goto out;
3402 }
3403
3404 if (!netif_running(dev)) {
3405 err = -ENETDOWN;
3406 goto out;
3407 }
3408
3409 err = cfg80211_leave_ibss(drv, dev, false);
3410
3411 out:
3412 cfg80211_put_dev(drv);
3413 dev_put(dev);
3414 unlock_rtnl:
3415 rtnl_unlock();
3416 return err;
3417 }
3418
3419 #ifdef CONFIG_NL80211_TESTMODE
3420 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3421 .name = "testmode",
3422 };
3423
3424 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3425 {
3426 struct cfg80211_registered_device *rdev;
3427 int err;
3428
3429 if (!info->attrs[NL80211_ATTR_TESTDATA])
3430 return -EINVAL;
3431
3432 rtnl_lock();
3433
3434 rdev = cfg80211_get_dev_from_info(info);
3435 if (IS_ERR(rdev)) {
3436 err = PTR_ERR(rdev);
3437 goto unlock_rtnl;
3438 }
3439
3440 err = -EOPNOTSUPP;
3441 if (rdev->ops->testmode_cmd) {
3442 rdev->testmode_info = info;
3443 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3444 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3445 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3446 rdev->testmode_info = NULL;
3447 }
3448
3449 cfg80211_put_dev(rdev);
3450
3451 unlock_rtnl:
3452 rtnl_unlock();
3453 return err;
3454 }
3455
3456 static struct sk_buff *
3457 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3458 int approxlen, u32 pid, u32 seq, gfp_t gfp)
3459 {
3460 struct sk_buff *skb;
3461 void *hdr;
3462 struct nlattr *data;
3463
3464 skb = nlmsg_new(approxlen + 100, gfp);
3465 if (!skb)
3466 return NULL;
3467
3468 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3469 if (!hdr) {
3470 kfree_skb(skb);
3471 return NULL;
3472 }
3473
3474 NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3475 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3476
3477 ((void **)skb->cb)[0] = rdev;
3478 ((void **)skb->cb)[1] = hdr;
3479 ((void **)skb->cb)[2] = data;
3480
3481 return skb;
3482
3483 nla_put_failure:
3484 kfree_skb(skb);
3485 return NULL;
3486 }
3487
3488 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3489 int approxlen)
3490 {
3491 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3492
3493 if (WARN_ON(!rdev->testmode_info))
3494 return NULL;
3495
3496 return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3497 rdev->testmode_info->snd_pid,
3498 rdev->testmode_info->snd_seq,
3499 GFP_KERNEL);
3500 }
3501 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3502
3503 int cfg80211_testmode_reply(struct sk_buff *skb)
3504 {
3505 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3506 void *hdr = ((void **)skb->cb)[1];
3507 struct nlattr *data = ((void **)skb->cb)[2];
3508
3509 if (WARN_ON(!rdev->testmode_info)) {
3510 kfree_skb(skb);
3511 return -EINVAL;
3512 }
3513
3514 nla_nest_end(skb, data);
3515 genlmsg_end(skb, hdr);
3516 return genlmsg_reply(skb, rdev->testmode_info);
3517 }
3518 EXPORT_SYMBOL(cfg80211_testmode_reply);
3519
3520 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
3521 int approxlen, gfp_t gfp)
3522 {
3523 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3524
3525 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
3526 }
3527 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
3528
3529 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
3530 {
3531 void *hdr = ((void **)skb->cb)[1];
3532 struct nlattr *data = ((void **)skb->cb)[2];
3533
3534 nla_nest_end(skb, data);
3535 genlmsg_end(skb, hdr);
3536 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
3537 }
3538 EXPORT_SYMBOL(cfg80211_testmode_event);
3539 #endif
3540
3541 static struct genl_ops nl80211_ops[] = {
3542 {
3543 .cmd = NL80211_CMD_GET_WIPHY,
3544 .doit = nl80211_get_wiphy,
3545 .dumpit = nl80211_dump_wiphy,
3546 .policy = nl80211_policy,
3547 /* can be retrieved by unprivileged users */
3548 },
3549 {
3550 .cmd = NL80211_CMD_SET_WIPHY,
3551 .doit = nl80211_set_wiphy,
3552 .policy = nl80211_policy,
3553 .flags = GENL_ADMIN_PERM,
3554 },
3555 {
3556 .cmd = NL80211_CMD_GET_INTERFACE,
3557 .doit = nl80211_get_interface,
3558 .dumpit = nl80211_dump_interface,
3559 .policy = nl80211_policy,
3560 /* can be retrieved by unprivileged users */
3561 },
3562 {
3563 .cmd = NL80211_CMD_SET_INTERFACE,
3564 .doit = nl80211_set_interface,
3565 .policy = nl80211_policy,
3566 .flags = GENL_ADMIN_PERM,
3567 },
3568 {
3569 .cmd = NL80211_CMD_NEW_INTERFACE,
3570 .doit = nl80211_new_interface,
3571 .policy = nl80211_policy,
3572 .flags = GENL_ADMIN_PERM,
3573 },
3574 {
3575 .cmd = NL80211_CMD_DEL_INTERFACE,
3576 .doit = nl80211_del_interface,
3577 .policy = nl80211_policy,
3578 .flags = GENL_ADMIN_PERM,
3579 },
3580 {
3581 .cmd = NL80211_CMD_GET_KEY,
3582 .doit = nl80211_get_key,
3583 .policy = nl80211_policy,
3584 .flags = GENL_ADMIN_PERM,
3585 },
3586 {
3587 .cmd = NL80211_CMD_SET_KEY,
3588 .doit = nl80211_set_key,
3589 .policy = nl80211_policy,
3590 .flags = GENL_ADMIN_PERM,
3591 },
3592 {
3593 .cmd = NL80211_CMD_NEW_KEY,
3594 .doit = nl80211_new_key,
3595 .policy = nl80211_policy,
3596 .flags = GENL_ADMIN_PERM,
3597 },
3598 {
3599 .cmd = NL80211_CMD_DEL_KEY,
3600 .doit = nl80211_del_key,
3601 .policy = nl80211_policy,
3602 .flags = GENL_ADMIN_PERM,
3603 },
3604 {
3605 .cmd = NL80211_CMD_SET_BEACON,
3606 .policy = nl80211_policy,
3607 .flags = GENL_ADMIN_PERM,
3608 .doit = nl80211_addset_beacon,
3609 },
3610 {
3611 .cmd = NL80211_CMD_NEW_BEACON,
3612 .policy = nl80211_policy,
3613 .flags = GENL_ADMIN_PERM,
3614 .doit = nl80211_addset_beacon,
3615 },
3616 {
3617 .cmd = NL80211_CMD_DEL_BEACON,
3618 .policy = nl80211_policy,
3619 .flags = GENL_ADMIN_PERM,
3620 .doit = nl80211_del_beacon,
3621 },
3622 {
3623 .cmd = NL80211_CMD_GET_STATION,
3624 .doit = nl80211_get_station,
3625 .dumpit = nl80211_dump_station,
3626 .policy = nl80211_policy,
3627 },
3628 {
3629 .cmd = NL80211_CMD_SET_STATION,
3630 .doit = nl80211_set_station,
3631 .policy = nl80211_policy,
3632 .flags = GENL_ADMIN_PERM,
3633 },
3634 {
3635 .cmd = NL80211_CMD_NEW_STATION,
3636 .doit = nl80211_new_station,
3637 .policy = nl80211_policy,
3638 .flags = GENL_ADMIN_PERM,
3639 },
3640 {
3641 .cmd = NL80211_CMD_DEL_STATION,
3642 .doit = nl80211_del_station,
3643 .policy = nl80211_policy,
3644 .flags = GENL_ADMIN_PERM,
3645 },
3646 {
3647 .cmd = NL80211_CMD_GET_MPATH,
3648 .doit = nl80211_get_mpath,
3649 .dumpit = nl80211_dump_mpath,
3650 .policy = nl80211_policy,
3651 .flags = GENL_ADMIN_PERM,
3652 },
3653 {
3654 .cmd = NL80211_CMD_SET_MPATH,
3655 .doit = nl80211_set_mpath,
3656 .policy = nl80211_policy,
3657 .flags = GENL_ADMIN_PERM,
3658 },
3659 {
3660 .cmd = NL80211_CMD_NEW_MPATH,
3661 .doit = nl80211_new_mpath,
3662 .policy = nl80211_policy,
3663 .flags = GENL_ADMIN_PERM,
3664 },
3665 {
3666 .cmd = NL80211_CMD_DEL_MPATH,
3667 .doit = nl80211_del_mpath,
3668 .policy = nl80211_policy,
3669 .flags = GENL_ADMIN_PERM,
3670 },
3671 {
3672 .cmd = NL80211_CMD_SET_BSS,
3673 .doit = nl80211_set_bss,
3674 .policy = nl80211_policy,
3675 .flags = GENL_ADMIN_PERM,
3676 },
3677 {
3678 .cmd = NL80211_CMD_GET_REG,
3679 .doit = nl80211_get_reg,
3680 .policy = nl80211_policy,
3681 /* can be retrieved by unprivileged users */
3682 },
3683 {
3684 .cmd = NL80211_CMD_SET_REG,
3685 .doit = nl80211_set_reg,
3686 .policy = nl80211_policy,
3687 .flags = GENL_ADMIN_PERM,
3688 },
3689 {
3690 .cmd = NL80211_CMD_REQ_SET_REG,
3691 .doit = nl80211_req_set_reg,
3692 .policy = nl80211_policy,
3693 .flags = GENL_ADMIN_PERM,
3694 },
3695 {
3696 .cmd = NL80211_CMD_GET_MESH_PARAMS,
3697 .doit = nl80211_get_mesh_params,
3698 .policy = nl80211_policy,
3699 /* can be retrieved by unprivileged users */
3700 },
3701 {
3702 .cmd = NL80211_CMD_SET_MESH_PARAMS,
3703 .doit = nl80211_set_mesh_params,
3704 .policy = nl80211_policy,
3705 .flags = GENL_ADMIN_PERM,
3706 },
3707 {
3708 .cmd = NL80211_CMD_TRIGGER_SCAN,
3709 .doit = nl80211_trigger_scan,
3710 .policy = nl80211_policy,
3711 .flags = GENL_ADMIN_PERM,
3712 },
3713 {
3714 .cmd = NL80211_CMD_GET_SCAN,
3715 .policy = nl80211_policy,
3716 .dumpit = nl80211_dump_scan,
3717 },
3718 {
3719 .cmd = NL80211_CMD_AUTHENTICATE,
3720 .doit = nl80211_authenticate,
3721 .policy = nl80211_policy,
3722 .flags = GENL_ADMIN_PERM,
3723 },
3724 {
3725 .cmd = NL80211_CMD_ASSOCIATE,
3726 .doit = nl80211_associate,
3727 .policy = nl80211_policy,
3728 .flags = GENL_ADMIN_PERM,
3729 },
3730 {
3731 .cmd = NL80211_CMD_DEAUTHENTICATE,
3732 .doit = nl80211_deauthenticate,
3733 .policy = nl80211_policy,
3734 .flags = GENL_ADMIN_PERM,
3735 },
3736 {
3737 .cmd = NL80211_CMD_DISASSOCIATE,
3738 .doit = nl80211_disassociate,
3739 .policy = nl80211_policy,
3740 .flags = GENL_ADMIN_PERM,
3741 },
3742 {
3743 .cmd = NL80211_CMD_JOIN_IBSS,
3744 .doit = nl80211_join_ibss,
3745 .policy = nl80211_policy,
3746 .flags = GENL_ADMIN_PERM,
3747 },
3748 {
3749 .cmd = NL80211_CMD_LEAVE_IBSS,
3750 .doit = nl80211_leave_ibss,
3751 .policy = nl80211_policy,
3752 .flags = GENL_ADMIN_PERM,
3753 },
3754 #ifdef CONFIG_NL80211_TESTMODE
3755 {
3756 .cmd = NL80211_CMD_TESTMODE,
3757 .doit = nl80211_testmode_do,
3758 .policy = nl80211_policy,
3759 .flags = GENL_ADMIN_PERM,
3760 },
3761 #endif
3762 };
3763 static struct genl_multicast_group nl80211_mlme_mcgrp = {
3764 .name = "mlme",
3765 };
3766
3767 /* multicast groups */
3768 static struct genl_multicast_group nl80211_config_mcgrp = {
3769 .name = "config",
3770 };
3771 static struct genl_multicast_group nl80211_scan_mcgrp = {
3772 .name = "scan",
3773 };
3774 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
3775 .name = "regulatory",
3776 };
3777
3778 /* notification functions */
3779
3780 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
3781 {
3782 struct sk_buff *msg;
3783
3784 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3785 if (!msg)
3786 return;
3787
3788 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
3789 nlmsg_free(msg);
3790 return;
3791 }
3792
3793 genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
3794 }
3795
3796 static int nl80211_add_scan_req(struct sk_buff *msg,
3797 struct cfg80211_registered_device *rdev)
3798 {
3799 struct cfg80211_scan_request *req = rdev->scan_req;
3800 struct nlattr *nest;
3801 int i;
3802
3803 if (WARN_ON(!req))
3804 return 0;
3805
3806 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
3807 if (!nest)
3808 goto nla_put_failure;
3809 for (i = 0; i < req->n_ssids; i++)
3810 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
3811 nla_nest_end(msg, nest);
3812
3813 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
3814 if (!nest)
3815 goto nla_put_failure;
3816 for (i = 0; i < req->n_channels; i++)
3817 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
3818 nla_nest_end(msg, nest);
3819
3820 if (req->ie)
3821 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
3822
3823 return 0;
3824 nla_put_failure:
3825 return -ENOBUFS;
3826 }
3827
3828 static int nl80211_send_scan_msg(struct sk_buff *msg,
3829 struct cfg80211_registered_device *rdev,
3830 struct net_device *netdev,
3831 u32 pid, u32 seq, int flags,
3832 u32 cmd)
3833 {
3834 void *hdr;
3835
3836 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
3837 if (!hdr)
3838 return -1;
3839
3840 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3841 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3842
3843 /* ignore errors and send incomplete event anyway */
3844 nl80211_add_scan_req(msg, rdev);
3845
3846 return genlmsg_end(msg, hdr);
3847
3848 nla_put_failure:
3849 genlmsg_cancel(msg, hdr);
3850 return -EMSGSIZE;
3851 }
3852
3853 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
3854 struct net_device *netdev)
3855 {
3856 struct sk_buff *msg;
3857
3858 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3859 if (!msg)
3860 return;
3861
3862 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
3863 NL80211_CMD_TRIGGER_SCAN) < 0) {
3864 nlmsg_free(msg);
3865 return;
3866 }
3867
3868 genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3869 }
3870
3871 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
3872 struct net_device *netdev)
3873 {
3874 struct sk_buff *msg;
3875
3876 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3877 if (!msg)
3878 return;
3879
3880 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
3881 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
3882 nlmsg_free(msg);
3883 return;
3884 }
3885
3886 genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3887 }
3888
3889 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
3890 struct net_device *netdev)
3891 {
3892 struct sk_buff *msg;
3893
3894 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3895 if (!msg)
3896 return;
3897
3898 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
3899 NL80211_CMD_SCAN_ABORTED) < 0) {
3900 nlmsg_free(msg);
3901 return;
3902 }
3903
3904 genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3905 }
3906
3907 /*
3908 * This can happen on global regulatory changes or device specific settings
3909 * based on custom world regulatory domains.
3910 */
3911 void nl80211_send_reg_change_event(struct regulatory_request *request)
3912 {
3913 struct sk_buff *msg;
3914 void *hdr;
3915
3916 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3917 if (!msg)
3918 return;
3919
3920 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
3921 if (!hdr) {
3922 nlmsg_free(msg);
3923 return;
3924 }
3925
3926 /* Userspace can always count this one always being set */
3927 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
3928
3929 if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
3930 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3931 NL80211_REGDOM_TYPE_WORLD);
3932 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
3933 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3934 NL80211_REGDOM_TYPE_CUSTOM_WORLD);
3935 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
3936 request->intersect)
3937 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3938 NL80211_REGDOM_TYPE_INTERSECTION);
3939 else {
3940 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3941 NL80211_REGDOM_TYPE_COUNTRY);
3942 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
3943 }
3944
3945 if (wiphy_idx_valid(request->wiphy_idx))
3946 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
3947
3948 if (genlmsg_end(msg, hdr) < 0) {
3949 nlmsg_free(msg);
3950 return;
3951 }
3952
3953 genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_KERNEL);
3954
3955 return;
3956
3957 nla_put_failure:
3958 genlmsg_cancel(msg, hdr);
3959 nlmsg_free(msg);
3960 }
3961
3962 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
3963 struct net_device *netdev,
3964 const u8 *buf, size_t len,
3965 enum nl80211_commands cmd, gfp_t gfp)
3966 {
3967 struct sk_buff *msg;
3968 void *hdr;
3969
3970 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
3971 if (!msg)
3972 return;
3973
3974 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3975 if (!hdr) {
3976 nlmsg_free(msg);
3977 return;
3978 }
3979
3980 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3981 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3982 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
3983
3984 if (genlmsg_end(msg, hdr) < 0) {
3985 nlmsg_free(msg);
3986 return;
3987 }
3988
3989 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
3990 return;
3991
3992 nla_put_failure:
3993 genlmsg_cancel(msg, hdr);
3994 nlmsg_free(msg);
3995 }
3996
3997 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
3998 struct net_device *netdev, const u8 *buf,
3999 size_t len, gfp_t gfp)
4000 {
4001 nl80211_send_mlme_event(rdev, netdev, buf, len,
4002 NL80211_CMD_AUTHENTICATE, gfp);
4003 }
4004
4005 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
4006 struct net_device *netdev, const u8 *buf,
4007 size_t len, gfp_t gfp)
4008 {
4009 nl80211_send_mlme_event(rdev, netdev, buf, len,
4010 NL80211_CMD_ASSOCIATE, gfp);
4011 }
4012
4013 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
4014 struct net_device *netdev, const u8 *buf,
4015 size_t len, gfp_t gfp)
4016 {
4017 nl80211_send_mlme_event(rdev, netdev, buf, len,
4018 NL80211_CMD_DEAUTHENTICATE, gfp);
4019 }
4020
4021 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
4022 struct net_device *netdev, const u8 *buf,
4023 size_t len, gfp_t gfp)
4024 {
4025 nl80211_send_mlme_event(rdev, netdev, buf, len,
4026 NL80211_CMD_DISASSOCIATE, gfp);
4027 }
4028
4029 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
4030 struct net_device *netdev, int cmd,
4031 const u8 *addr, gfp_t gfp)
4032 {
4033 struct sk_buff *msg;
4034 void *hdr;
4035
4036 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4037 if (!msg)
4038 return;
4039
4040 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
4041 if (!hdr) {
4042 nlmsg_free(msg);
4043 return;
4044 }
4045
4046 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4047 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4048 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
4049 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4050
4051 if (genlmsg_end(msg, hdr) < 0) {
4052 nlmsg_free(msg);
4053 return;
4054 }
4055
4056 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
4057 return;
4058
4059 nla_put_failure:
4060 genlmsg_cancel(msg, hdr);
4061 nlmsg_free(msg);
4062 }
4063
4064 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
4065 struct net_device *netdev, const u8 *addr,
4066 gfp_t gfp)
4067 {
4068 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
4069 addr, gfp);
4070 }
4071
4072 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
4073 struct net_device *netdev, const u8 *addr,
4074 gfp_t gfp)
4075 {
4076 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
4077 addr, gfp);
4078 }
4079
4080 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
4081 struct net_device *netdev, const u8 *bssid,
4082 gfp_t gfp)
4083 {
4084 struct sk_buff *msg;
4085 void *hdr;
4086
4087 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4088 if (!msg)
4089 return;
4090
4091 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
4092 if (!hdr) {
4093 nlmsg_free(msg);
4094 return;
4095 }
4096
4097 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4098 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4099 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4100
4101 if (genlmsg_end(msg, hdr) < 0) {
4102 nlmsg_free(msg);
4103 return;
4104 }
4105
4106 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
4107 return;
4108
4109 nla_put_failure:
4110 genlmsg_cancel(msg, hdr);
4111 nlmsg_free(msg);
4112 }
4113
4114 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
4115 struct net_device *netdev, const u8 *addr,
4116 enum nl80211_key_type key_type, int key_id,
4117 const u8 *tsc, gfp_t gfp)
4118 {
4119 struct sk_buff *msg;
4120 void *hdr;
4121
4122 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4123 if (!msg)
4124 return;
4125
4126 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
4127 if (!hdr) {
4128 nlmsg_free(msg);
4129 return;
4130 }
4131
4132 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4133 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4134 if (addr)
4135 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4136 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
4137 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
4138 if (tsc)
4139 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
4140
4141 if (genlmsg_end(msg, hdr) < 0) {
4142 nlmsg_free(msg);
4143 return;
4144 }
4145
4146 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
4147 return;
4148
4149 nla_put_failure:
4150 genlmsg_cancel(msg, hdr);
4151 nlmsg_free(msg);
4152 }
4153
4154 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
4155 struct ieee80211_channel *channel_before,
4156 struct ieee80211_channel *channel_after)
4157 {
4158 struct sk_buff *msg;
4159 void *hdr;
4160 struct nlattr *nl_freq;
4161
4162 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
4163 if (!msg)
4164 return;
4165
4166 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
4167 if (!hdr) {
4168 nlmsg_free(msg);
4169 return;
4170 }
4171
4172 /*
4173 * Since we are applying the beacon hint to a wiphy we know its
4174 * wiphy_idx is valid
4175 */
4176 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
4177
4178 /* Before */
4179 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
4180 if (!nl_freq)
4181 goto nla_put_failure;
4182 if (nl80211_msg_put_channel(msg, channel_before))
4183 goto nla_put_failure;
4184 nla_nest_end(msg, nl_freq);
4185
4186 /* After */
4187 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
4188 if (!nl_freq)
4189 goto nla_put_failure;
4190 if (nl80211_msg_put_channel(msg, channel_after))
4191 goto nla_put_failure;
4192 nla_nest_end(msg, nl_freq);
4193
4194 if (genlmsg_end(msg, hdr) < 0) {
4195 nlmsg_free(msg);
4196 return;
4197 }
4198
4199 genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_ATOMIC);
4200
4201 return;
4202
4203 nla_put_failure:
4204 genlmsg_cancel(msg, hdr);
4205 nlmsg_free(msg);
4206 }
4207
4208 /* initialisation/exit functions */
4209
4210 int nl80211_init(void)
4211 {
4212 int err;
4213
4214 err = genl_register_family_with_ops(&nl80211_fam,
4215 nl80211_ops, ARRAY_SIZE(nl80211_ops));
4216 if (err)
4217 return err;
4218
4219 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
4220 if (err)
4221 goto err_out;
4222
4223 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
4224 if (err)
4225 goto err_out;
4226
4227 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
4228 if (err)
4229 goto err_out;
4230
4231 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
4232 if (err)
4233 goto err_out;
4234
4235 #ifdef CONFIG_NL80211_TESTMODE
4236 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
4237 if (err)
4238 goto err_out;
4239 #endif
4240
4241 return 0;
4242 err_out:
4243 genl_unregister_family(&nl80211_fam);
4244 return err;
4245 }
4246
4247 void nl80211_exit(void)
4248 {
4249 genl_unregister_family(&nl80211_fam);
4250 }
ubuntu-bionic-kernel mirror