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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / net / wireless / nl80211.c
blob31b807af3235044557a72cffbf224d4926705280
1 /*
2 * This is the new netlink-based wireless configuration interface.
3 *
4 * Copyright 2006, 2007 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/mutex.h>
11 #include <linux/list.h>
12 #include <linux/if_ether.h>
13 #include <linux/ieee80211.h>
14 #include <linux/nl80211.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/netlink.h>
17 #include <net/genetlink.h>
18 #include <net/cfg80211.h>
19 #include "core.h"
20 #include "nl80211.h"
21 #include "reg.h"
22
23 /* the netlink family */
24 static struct genl_family nl80211_fam = {
25 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
26 .name = "nl80211", /* have users key off the name instead */
27 .hdrsize = 0, /* no private header */
28 .version = 1, /* no particular meaning now */
29 .maxattr = NL80211_ATTR_MAX,
30 };
31
32 /* internal helper: get drv and dev */
33 static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
34 struct cfg80211_registered_device **drv,
35 struct net_device **dev)
36 {
37 int ifindex;
38
39 if (!attrs[NL80211_ATTR_IFINDEX])
40 return -EINVAL;
41
42 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
43 *dev = dev_get_by_index(&init_net, ifindex);
44 if (!*dev)
45 return -ENODEV;
46
47 *drv = cfg80211_get_dev_from_ifindex(ifindex);
48 if (IS_ERR(*drv)) {
49 dev_put(*dev);
50 return PTR_ERR(*drv);
51 }
52
53 return 0;
54 }
55
56 /* policy for the attributes */
57 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
58 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
59 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
60 .len = BUS_ID_SIZE-1 },
61 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
62 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
63 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
64
65 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
66 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
67 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
68
69 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
70
71 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
72 .len = WLAN_MAX_KEY_LEN },
73 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
74 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
75 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
76
77 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
78 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
79 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
80 .len = IEEE80211_MAX_DATA_LEN },
81 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
82 .len = IEEE80211_MAX_DATA_LEN },
83 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
84 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
85 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
86 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
87 .len = NL80211_MAX_SUPP_RATES },
88 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
89 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
90 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
91 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
92 .len = IEEE80211_MAX_MESH_ID_LEN },
93 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
94
95 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
96 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
97
98 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
99 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
100 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
101 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
102 .len = NL80211_MAX_SUPP_RATES },
103
104 [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
105
106 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
107 .len = NL80211_HT_CAPABILITY_LEN },
108 };
109
110 /* message building helper */
111 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
112 int flags, u8 cmd)
113 {
114 /* since there is no private header just add the generic one */
115 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
116 }
117
118 /* netlink command implementations */
119
120 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
121 struct cfg80211_registered_device *dev)
122 {
123 void *hdr;
124 struct nlattr *nl_bands, *nl_band;
125 struct nlattr *nl_freqs, *nl_freq;
126 struct nlattr *nl_rates, *nl_rate;
127 struct nlattr *nl_modes;
128 enum ieee80211_band band;
129 struct ieee80211_channel *chan;
130 struct ieee80211_rate *rate;
131 int i;
132 u16 ifmodes = dev->wiphy.interface_modes;
133
134 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
135 if (!hdr)
136 return -1;
137
138 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx);
139 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
140
141 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
142 if (!nl_modes)
143 goto nla_put_failure;
144
145 i = 0;
146 while (ifmodes) {
147 if (ifmodes & 1)
148 NLA_PUT_FLAG(msg, i);
149 ifmodes >>= 1;
150 i++;
151 }
152
153 nla_nest_end(msg, nl_modes);
154
155 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
156 if (!nl_bands)
157 goto nla_put_failure;
158
159 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
160 if (!dev->wiphy.bands[band])
161 continue;
162
163 nl_band = nla_nest_start(msg, band);
164 if (!nl_band)
165 goto nla_put_failure;
166
167 /* add HT info */
168 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
169 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
170 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
171 &dev->wiphy.bands[band]->ht_cap.mcs);
172 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
173 dev->wiphy.bands[band]->ht_cap.cap);
174 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
175 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
176 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
177 dev->wiphy.bands[band]->ht_cap.ampdu_density);
178 }
179
180 /* add frequencies */
181 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
182 if (!nl_freqs)
183 goto nla_put_failure;
184
185 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
186 nl_freq = nla_nest_start(msg, i);
187 if (!nl_freq)
188 goto nla_put_failure;
189
190 chan = &dev->wiphy.bands[band]->channels[i];
191 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
192 chan->center_freq);
193
194 if (chan->flags & IEEE80211_CHAN_DISABLED)
195 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
196 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
197 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
198 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
199 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
200 if (chan->flags & IEEE80211_CHAN_RADAR)
201 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
202
203 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
204 DBM_TO_MBM(chan->max_power));
205
206 nla_nest_end(msg, nl_freq);
207 }
208
209 nla_nest_end(msg, nl_freqs);
210
211 /* add bitrates */
212 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
213 if (!nl_rates)
214 goto nla_put_failure;
215
216 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
217 nl_rate = nla_nest_start(msg, i);
218 if (!nl_rate)
219 goto nla_put_failure;
220
221 rate = &dev->wiphy.bands[band]->bitrates[i];
222 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
223 rate->bitrate);
224 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
225 NLA_PUT_FLAG(msg,
226 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
227
228 nla_nest_end(msg, nl_rate);
229 }
230
231 nla_nest_end(msg, nl_rates);
232
233 nla_nest_end(msg, nl_band);
234 }
235 nla_nest_end(msg, nl_bands);
236
237 return genlmsg_end(msg, hdr);
238
239 nla_put_failure:
240 genlmsg_cancel(msg, hdr);
241 return -EMSGSIZE;
242 }
243
244 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
245 {
246 int idx = 0;
247 int start = cb->args[0];
248 struct cfg80211_registered_device *dev;
249
250 mutex_lock(&cfg80211_drv_mutex);
251 list_for_each_entry(dev, &cfg80211_drv_list, list) {
252 if (++idx <= start)
253 continue;
254 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
255 cb->nlh->nlmsg_seq, NLM_F_MULTI,
256 dev) < 0) {
257 idx--;
258 break;
259 }
260 }
261 mutex_unlock(&cfg80211_drv_mutex);
262
263 cb->args[0] = idx;
264
265 return skb->len;
266 }
267
268 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
269 {
270 struct sk_buff *msg;
271 struct cfg80211_registered_device *dev;
272
273 dev = cfg80211_get_dev_from_info(info);
274 if (IS_ERR(dev))
275 return PTR_ERR(dev);
276
277 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
278 if (!msg)
279 goto out_err;
280
281 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
282 goto out_free;
283
284 cfg80211_put_dev(dev);
285
286 return genlmsg_unicast(msg, info->snd_pid);
287
288 out_free:
289 nlmsg_free(msg);
290 out_err:
291 cfg80211_put_dev(dev);
292 return -ENOBUFS;
293 }
294
295 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
296 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
297 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
298 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
299 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
300 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
301 };
302
303 static int parse_txq_params(struct nlattr *tb[],
304 struct ieee80211_txq_params *txq_params)
305 {
306 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
307 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
308 !tb[NL80211_TXQ_ATTR_AIFS])
309 return -EINVAL;
310
311 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
312 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
313 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
314 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
315 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
316
317 return 0;
318 }
319
320 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
321 {
322 struct cfg80211_registered_device *rdev;
323 int result = 0, rem_txq_params = 0;
324 struct nlattr *nl_txq_params;
325
326 rdev = cfg80211_get_dev_from_info(info);
327 if (IS_ERR(rdev))
328 return PTR_ERR(rdev);
329
330 if (info->attrs[NL80211_ATTR_WIPHY_NAME]) {
331 result = cfg80211_dev_rename(
332 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
333 if (result)
334 goto bad_res;
335 }
336
337 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
338 struct ieee80211_txq_params txq_params;
339 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
340
341 if (!rdev->ops->set_txq_params) {
342 result = -EOPNOTSUPP;
343 goto bad_res;
344 }
345
346 nla_for_each_nested(nl_txq_params,
347 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
348 rem_txq_params) {
349 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
350 nla_data(nl_txq_params),
351 nla_len(nl_txq_params),
352 txq_params_policy);
353 result = parse_txq_params(tb, &txq_params);
354 if (result)
355 goto bad_res;
356
357 result = rdev->ops->set_txq_params(&rdev->wiphy,
358 &txq_params);
359 if (result)
360 goto bad_res;
361 }
362 }
363
364 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
365 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
366 struct ieee80211_channel *chan;
367 struct ieee80211_sta_ht_cap *ht_cap;
368 u32 freq, sec_freq;
369
370 if (!rdev->ops->set_channel) {
371 result = -EOPNOTSUPP;
372 goto bad_res;
373 }
374
375 result = -EINVAL;
376
377 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
378 channel_type = nla_get_u32(info->attrs[
379 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
380 if (channel_type != NL80211_CHAN_NO_HT &&
381 channel_type != NL80211_CHAN_HT20 &&
382 channel_type != NL80211_CHAN_HT40PLUS &&
383 channel_type != NL80211_CHAN_HT40MINUS)
384 goto bad_res;
385 }
386
387 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
388 chan = ieee80211_get_channel(&rdev->wiphy, freq);
389
390 /* Primary channel not allowed */
391 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
392 goto bad_res;
393
394 if (channel_type == NL80211_CHAN_HT40MINUS)
395 sec_freq = freq - 20;
396 else if (channel_type == NL80211_CHAN_HT40PLUS)
397 sec_freq = freq + 20;
398 else
399 sec_freq = 0;
400
401 ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
402
403 /* no HT capabilities */
404 if (channel_type != NL80211_CHAN_NO_HT &&
405 !ht_cap->ht_supported)
406 goto bad_res;
407
408 if (sec_freq) {
409 struct ieee80211_channel *schan;
410
411 /* no 40 MHz capabilities */
412 if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
413 (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
414 goto bad_res;
415
416 schan = ieee80211_get_channel(&rdev->wiphy, sec_freq);
417
418 /* Secondary channel not allowed */
419 if (!schan || schan->flags & IEEE80211_CHAN_DISABLED)
420 goto bad_res;
421 }
422
423 result = rdev->ops->set_channel(&rdev->wiphy, chan,
424 channel_type);
425 if (result)
426 goto bad_res;
427 }
428
429
430 bad_res:
431 cfg80211_put_dev(rdev);
432 return result;
433 }
434
435
436 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
437 struct net_device *dev)
438 {
439 void *hdr;
440
441 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
442 if (!hdr)
443 return -1;
444
445 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
446 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
447 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
448 return genlmsg_end(msg, hdr);
449
450 nla_put_failure:
451 genlmsg_cancel(msg, hdr);
452 return -EMSGSIZE;
453 }
454
455 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
456 {
457 int wp_idx = 0;
458 int if_idx = 0;
459 int wp_start = cb->args[0];
460 int if_start = cb->args[1];
461 struct cfg80211_registered_device *dev;
462 struct wireless_dev *wdev;
463
464 mutex_lock(&cfg80211_drv_mutex);
465 list_for_each_entry(dev, &cfg80211_drv_list, list) {
466 if (wp_idx < wp_start) {
467 wp_idx++;
468 continue;
469 }
470 if_idx = 0;
471
472 mutex_lock(&dev->devlist_mtx);
473 list_for_each_entry(wdev, &dev->netdev_list, list) {
474 if (if_idx < if_start) {
475 if_idx++;
476 continue;
477 }
478 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
479 cb->nlh->nlmsg_seq, NLM_F_MULTI,
480 wdev->netdev) < 0) {
481 mutex_unlock(&dev->devlist_mtx);
482 goto out;
483 }
484 if_idx++;
485 }
486 mutex_unlock(&dev->devlist_mtx);
487
488 wp_idx++;
489 }
490 out:
491 mutex_unlock(&cfg80211_drv_mutex);
492
493 cb->args[0] = wp_idx;
494 cb->args[1] = if_idx;
495
496 return skb->len;
497 }
498
499 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
500 {
501 struct sk_buff *msg;
502 struct cfg80211_registered_device *dev;
503 struct net_device *netdev;
504 int err;
505
506 err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
507 if (err)
508 return err;
509
510 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
511 if (!msg)
512 goto out_err;
513
514 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
515 goto out_free;
516
517 dev_put(netdev);
518 cfg80211_put_dev(dev);
519
520 return genlmsg_unicast(msg, info->snd_pid);
521
522 out_free:
523 nlmsg_free(msg);
524 out_err:
525 dev_put(netdev);
526 cfg80211_put_dev(dev);
527 return -ENOBUFS;
528 }
529
530 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
531 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
532 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
533 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
534 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
535 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
536 };
537
538 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
539 {
540 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
541 int flag;
542
543 *mntrflags = 0;
544
545 if (!nla)
546 return -EINVAL;
547
548 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
549 nla, mntr_flags_policy))
550 return -EINVAL;
551
552 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
553 if (flags[flag])
554 *mntrflags |= (1<<flag);
555
556 return 0;
557 }
558
559 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
560 {
561 struct cfg80211_registered_device *drv;
562 struct vif_params params;
563 int err, ifindex;
564 enum nl80211_iftype type;
565 struct net_device *dev;
566 u32 _flags, *flags = NULL;
567
568 memset(&params, 0, sizeof(params));
569
570 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
571 if (err)
572 return err;
573 ifindex = dev->ifindex;
574 type = dev->ieee80211_ptr->iftype;
575 dev_put(dev);
576
577 err = -EINVAL;
578 if (info->attrs[NL80211_ATTR_IFTYPE]) {
579 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
580 if (type > NL80211_IFTYPE_MAX)
581 goto unlock;
582 }
583
584 if (!drv->ops->change_virtual_intf ||
585 !(drv->wiphy.interface_modes & (1 << type))) {
586 err = -EOPNOTSUPP;
587 goto unlock;
588 }
589
590 if (info->attrs[NL80211_ATTR_MESH_ID]) {
591 if (type != NL80211_IFTYPE_MESH_POINT) {
592 err = -EINVAL;
593 goto unlock;
594 }
595 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
596 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
597 }
598
599 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
600 if (type != NL80211_IFTYPE_MONITOR) {
601 err = -EINVAL;
602 goto unlock;
603 }
604 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
605 &_flags);
606 if (!err)
607 flags = &_flags;
608 }
609 rtnl_lock();
610 err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
611 type, flags, &params);
612
613 dev = __dev_get_by_index(&init_net, ifindex);
614 WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));
615
616 rtnl_unlock();
617
618 unlock:
619 cfg80211_put_dev(drv);
620 return err;
621 }
622
623 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
624 {
625 struct cfg80211_registered_device *drv;
626 struct vif_params params;
627 int err;
628 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
629 u32 flags;
630
631 memset(&params, 0, sizeof(params));
632
633 if (!info->attrs[NL80211_ATTR_IFNAME])
634 return -EINVAL;
635
636 if (info->attrs[NL80211_ATTR_IFTYPE]) {
637 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
638 if (type > NL80211_IFTYPE_MAX)
639 return -EINVAL;
640 }
641
642 drv = cfg80211_get_dev_from_info(info);
643 if (IS_ERR(drv))
644 return PTR_ERR(drv);
645
646 if (!drv->ops->add_virtual_intf ||
647 !(drv->wiphy.interface_modes & (1 << type))) {
648 err = -EOPNOTSUPP;
649 goto unlock;
650 }
651
652 if (type == NL80211_IFTYPE_MESH_POINT &&
653 info->attrs[NL80211_ATTR_MESH_ID]) {
654 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
655 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
656 }
657
658 rtnl_lock();
659 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
660 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
661 &flags);
662 err = drv->ops->add_virtual_intf(&drv->wiphy,
663 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
664 type, err ? NULL : &flags, &params);
665 rtnl_unlock();
666
667
668 unlock:
669 cfg80211_put_dev(drv);
670 return err;
671 }
672
673 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
674 {
675 struct cfg80211_registered_device *drv;
676 int ifindex, err;
677 struct net_device *dev;
678
679 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
680 if (err)
681 return err;
682 ifindex = dev->ifindex;
683 dev_put(dev);
684
685 if (!drv->ops->del_virtual_intf) {
686 err = -EOPNOTSUPP;
687 goto out;
688 }
689
690 rtnl_lock();
691 err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
692 rtnl_unlock();
693
694 out:
695 cfg80211_put_dev(drv);
696 return err;
697 }
698
699 struct get_key_cookie {
700 struct sk_buff *msg;
701 int error;
702 };
703
704 static void get_key_callback(void *c, struct key_params *params)
705 {
706 struct get_key_cookie *cookie = c;
707
708 if (params->key)
709 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
710 params->key_len, params->key);
711
712 if (params->seq)
713 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
714 params->seq_len, params->seq);
715
716 if (params->cipher)
717 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
718 params->cipher);
719
720 return;
721 nla_put_failure:
722 cookie->error = 1;
723 }
724
725 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
726 {
727 struct cfg80211_registered_device *drv;
728 int err;
729 struct net_device *dev;
730 u8 key_idx = 0;
731 u8 *mac_addr = NULL;
732 struct get_key_cookie cookie = {
733 .error = 0,
734 };
735 void *hdr;
736 struct sk_buff *msg;
737
738 if (info->attrs[NL80211_ATTR_KEY_IDX])
739 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
740
741 if (key_idx > 3)
742 return -EINVAL;
743
744 if (info->attrs[NL80211_ATTR_MAC])
745 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
746
747 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
748 if (err)
749 return err;
750
751 if (!drv->ops->get_key) {
752 err = -EOPNOTSUPP;
753 goto out;
754 }
755
756 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
757 if (!msg) {
758 err = -ENOMEM;
759 goto out;
760 }
761
762 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
763 NL80211_CMD_NEW_KEY);
764
765 if (IS_ERR(hdr)) {
766 err = PTR_ERR(hdr);
767 goto out;
768 }
769
770 cookie.msg = msg;
771
772 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
773 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
774 if (mac_addr)
775 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
776
777 rtnl_lock();
778 err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
779 &cookie, get_key_callback);
780 rtnl_unlock();
781
782 if (err)
783 goto out;
784
785 if (cookie.error)
786 goto nla_put_failure;
787
788 genlmsg_end(msg, hdr);
789 err = genlmsg_unicast(msg, info->snd_pid);
790 goto out;
791
792 nla_put_failure:
793 err = -ENOBUFS;
794 nlmsg_free(msg);
795 out:
796 cfg80211_put_dev(drv);
797 dev_put(dev);
798 return err;
799 }
800
801 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
802 {
803 struct cfg80211_registered_device *drv;
804 int err;
805 struct net_device *dev;
806 u8 key_idx;
807
808 if (!info->attrs[NL80211_ATTR_KEY_IDX])
809 return -EINVAL;
810
811 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
812
813 if (key_idx > 3)
814 return -EINVAL;
815
816 /* currently only support setting default key */
817 if (!info->attrs[NL80211_ATTR_KEY_DEFAULT])
818 return -EINVAL;
819
820 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
821 if (err)
822 return err;
823
824 if (!drv->ops->set_default_key) {
825 err = -EOPNOTSUPP;
826 goto out;
827 }
828
829 rtnl_lock();
830 err = drv->ops->set_default_key(&drv->wiphy, dev, key_idx);
831 rtnl_unlock();
832
833 out:
834 cfg80211_put_dev(drv);
835 dev_put(dev);
836 return err;
837 }
838
839 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
840 {
841 struct cfg80211_registered_device *drv;
842 int err;
843 struct net_device *dev;
844 struct key_params params;
845 u8 key_idx = 0;
846 u8 *mac_addr = NULL;
847
848 memset(&params, 0, sizeof(params));
849
850 if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
851 return -EINVAL;
852
853 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
854 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
855 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
856 }
857
858 if (info->attrs[NL80211_ATTR_KEY_IDX])
859 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
860
861 params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
862
863 if (info->attrs[NL80211_ATTR_MAC])
864 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
865
866 if (key_idx > 3)
867 return -EINVAL;
868
869 /*
870 * Disallow pairwise keys with non-zero index unless it's WEP
871 * (because current deployments use pairwise WEP keys with
872 * non-zero indizes but 802.11i clearly specifies to use zero)
873 */
874 if (mac_addr && key_idx &&
875 params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
876 params.cipher != WLAN_CIPHER_SUITE_WEP104)
877 return -EINVAL;
878
879 /* TODO: add definitions for the lengths to linux/ieee80211.h */
880 switch (params.cipher) {
881 case WLAN_CIPHER_SUITE_WEP40:
882 if (params.key_len != 5)
883 return -EINVAL;
884 break;
885 case WLAN_CIPHER_SUITE_TKIP:
886 if (params.key_len != 32)
887 return -EINVAL;
888 break;
889 case WLAN_CIPHER_SUITE_CCMP:
890 if (params.key_len != 16)
891 return -EINVAL;
892 break;
893 case WLAN_CIPHER_SUITE_WEP104:
894 if (params.key_len != 13)
895 return -EINVAL;
896 break;
897 default:
898 return -EINVAL;
899 }
900
901 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
902 if (err)
903 return err;
904
905 if (!drv->ops->add_key) {
906 err = -EOPNOTSUPP;
907 goto out;
908 }
909
910 rtnl_lock();
911 err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
912 rtnl_unlock();
913
914 out:
915 cfg80211_put_dev(drv);
916 dev_put(dev);
917 return err;
918 }
919
920 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
921 {
922 struct cfg80211_registered_device *drv;
923 int err;
924 struct net_device *dev;
925 u8 key_idx = 0;
926 u8 *mac_addr = NULL;
927
928 if (info->attrs[NL80211_ATTR_KEY_IDX])
929 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
930
931 if (key_idx > 3)
932 return -EINVAL;
933
934 if (info->attrs[NL80211_ATTR_MAC])
935 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
936
937 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
938 if (err)
939 return err;
940
941 if (!drv->ops->del_key) {
942 err = -EOPNOTSUPP;
943 goto out;
944 }
945
946 rtnl_lock();
947 err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
948 rtnl_unlock();
949
950 out:
951 cfg80211_put_dev(drv);
952 dev_put(dev);
953 return err;
954 }
955
956 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
957 {
958 int (*call)(struct wiphy *wiphy, struct net_device *dev,
959 struct beacon_parameters *info);
960 struct cfg80211_registered_device *drv;
961 int err;
962 struct net_device *dev;
963 struct beacon_parameters params;
964 int haveinfo = 0;
965
966 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
967 if (err)
968 return err;
969
970 switch (info->genlhdr->cmd) {
971 case NL80211_CMD_NEW_BEACON:
972 /* these are required for NEW_BEACON */
973 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
974 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
975 !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
976 err = -EINVAL;
977 goto out;
978 }
979
980 call = drv->ops->add_beacon;
981 break;
982 case NL80211_CMD_SET_BEACON:
983 call = drv->ops->set_beacon;
984 break;
985 default:
986 WARN_ON(1);
987 err = -EOPNOTSUPP;
988 goto out;
989 }
990
991 if (!call) {
992 err = -EOPNOTSUPP;
993 goto out;
994 }
995
996 memset(&params, 0, sizeof(params));
997
998 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
999 params.interval =
1000 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1001 haveinfo = 1;
1002 }
1003
1004 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1005 params.dtim_period =
1006 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1007 haveinfo = 1;
1008 }
1009
1010 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1011 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1012 params.head_len =
1013 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1014 haveinfo = 1;
1015 }
1016
1017 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1018 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1019 params.tail_len =
1020 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1021 haveinfo = 1;
1022 }
1023
1024 if (!haveinfo) {
1025 err = -EINVAL;
1026 goto out;
1027 }
1028
1029 rtnl_lock();
1030 err = call(&drv->wiphy, dev, &params);
1031 rtnl_unlock();
1032
1033 out:
1034 cfg80211_put_dev(drv);
1035 dev_put(dev);
1036 return err;
1037 }
1038
1039 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1040 {
1041 struct cfg80211_registered_device *drv;
1042 int err;
1043 struct net_device *dev;
1044
1045 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1046 if (err)
1047 return err;
1048
1049 if (!drv->ops->del_beacon) {
1050 err = -EOPNOTSUPP;
1051 goto out;
1052 }
1053
1054 rtnl_lock();
1055 err = drv->ops->del_beacon(&drv->wiphy, dev);
1056 rtnl_unlock();
1057
1058 out:
1059 cfg80211_put_dev(drv);
1060 dev_put(dev);
1061 return err;
1062 }
1063
1064 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1065 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1066 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1067 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1068 };
1069
1070 static int parse_station_flags(struct nlattr *nla, u32 *staflags)
1071 {
1072 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1073 int flag;
1074
1075 *staflags = 0;
1076
1077 if (!nla)
1078 return 0;
1079
1080 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1081 nla, sta_flags_policy))
1082 return -EINVAL;
1083
1084 *staflags = STATION_FLAG_CHANGED;
1085
1086 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1087 if (flags[flag])
1088 *staflags |= (1<<flag);
1089
1090 return 0;
1091 }
1092
1093 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1094 {
1095 int modulation, streams, bitrate;
1096
1097 if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1098 return rate->legacy;
1099
1100 /* the formula below does only work for MCS values smaller than 32 */
1101 if (rate->mcs >= 32)
1102 return 0;
1103
1104 modulation = rate->mcs & 7;
1105 streams = (rate->mcs >> 3) + 1;
1106
1107 bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1108 13500000 : 6500000;
1109
1110 if (modulation < 4)
1111 bitrate *= (modulation + 1);
1112 else if (modulation == 4)
1113 bitrate *= (modulation + 2);
1114 else
1115 bitrate *= (modulation + 3);
1116
1117 bitrate *= streams;
1118
1119 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1120 bitrate = (bitrate / 9) * 10;
1121
1122 /* do NOT round down here */
1123 return (bitrate + 50000) / 100000;
1124 }
1125
1126 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1127 int flags, struct net_device *dev,
1128 u8 *mac_addr, struct station_info *sinfo)
1129 {
1130 void *hdr;
1131 struct nlattr *sinfoattr, *txrate;
1132 u16 bitrate;
1133
1134 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1135 if (!hdr)
1136 return -1;
1137
1138 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1139 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1140
1141 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1142 if (!sinfoattr)
1143 goto nla_put_failure;
1144 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1145 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1146 sinfo->inactive_time);
1147 if (sinfo->filled & STATION_INFO_RX_BYTES)
1148 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1149 sinfo->rx_bytes);
1150 if (sinfo->filled & STATION_INFO_TX_BYTES)
1151 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1152 sinfo->tx_bytes);
1153 if (sinfo->filled & STATION_INFO_LLID)
1154 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1155 sinfo->llid);
1156 if (sinfo->filled & STATION_INFO_PLID)
1157 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1158 sinfo->plid);
1159 if (sinfo->filled & STATION_INFO_PLINK_STATE)
1160 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1161 sinfo->plink_state);
1162 if (sinfo->filled & STATION_INFO_SIGNAL)
1163 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1164 sinfo->signal);
1165 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1166 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1167 if (!txrate)
1168 goto nla_put_failure;
1169
1170 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1171 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1172 if (bitrate > 0)
1173 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1174
1175 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1176 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1177 sinfo->txrate.mcs);
1178 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1179 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1180 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1181 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1182
1183 nla_nest_end(msg, txrate);
1184 }
1185 nla_nest_end(msg, sinfoattr);
1186
1187 return genlmsg_end(msg, hdr);
1188
1189 nla_put_failure:
1190 genlmsg_cancel(msg, hdr);
1191 return -EMSGSIZE;
1192 }
1193
1194 static int nl80211_dump_station(struct sk_buff *skb,
1195 struct netlink_callback *cb)
1196 {
1197 struct station_info sinfo;
1198 struct cfg80211_registered_device *dev;
1199 struct net_device *netdev;
1200 u8 mac_addr[ETH_ALEN];
1201 int ifidx = cb->args[0];
1202 int sta_idx = cb->args[1];
1203 int err;
1204
1205 if (!ifidx) {
1206 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1207 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1208 nl80211_policy);
1209 if (err)
1210 return err;
1211
1212 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1213 return -EINVAL;
1214
1215 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1216 if (!ifidx)
1217 return -EINVAL;
1218 }
1219
1220 netdev = dev_get_by_index(&init_net, ifidx);
1221 if (!netdev)
1222 return -ENODEV;
1223
1224 dev = cfg80211_get_dev_from_ifindex(ifidx);
1225 if (IS_ERR(dev)) {
1226 err = PTR_ERR(dev);
1227 goto out_put_netdev;
1228 }
1229
1230 if (!dev->ops->dump_station) {
1231 err = -ENOSYS;
1232 goto out_err;
1233 }
1234
1235 rtnl_lock();
1236
1237 while (1) {
1238 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1239 mac_addr, &sinfo);
1240 if (err == -ENOENT)
1241 break;
1242 if (err)
1243 goto out_err_rtnl;
1244
1245 if (nl80211_send_station(skb,
1246 NETLINK_CB(cb->skb).pid,
1247 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1248 netdev, mac_addr,
1249 &sinfo) < 0)
1250 goto out;
1251
1252 sta_idx++;
1253 }
1254
1255
1256 out:
1257 cb->args[1] = sta_idx;
1258 err = skb->len;
1259 out_err_rtnl:
1260 rtnl_unlock();
1261 out_err:
1262 cfg80211_put_dev(dev);
1263 out_put_netdev:
1264 dev_put(netdev);
1265
1266 return err;
1267 }
1268
1269 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1270 {
1271 struct cfg80211_registered_device *drv;
1272 int err;
1273 struct net_device *dev;
1274 struct station_info sinfo;
1275 struct sk_buff *msg;
1276 u8 *mac_addr = NULL;
1277
1278 memset(&sinfo, 0, sizeof(sinfo));
1279
1280 if (!info->attrs[NL80211_ATTR_MAC])
1281 return -EINVAL;
1282
1283 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1284
1285 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1286 if (err)
1287 return err;
1288
1289 if (!drv->ops->get_station) {
1290 err = -EOPNOTSUPP;
1291 goto out;
1292 }
1293
1294 rtnl_lock();
1295 err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1296 rtnl_unlock();
1297
1298 if (err)
1299 goto out;
1300
1301 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1302 if (!msg)
1303 goto out;
1304
1305 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1306 dev, mac_addr, &sinfo) < 0)
1307 goto out_free;
1308
1309 err = genlmsg_unicast(msg, info->snd_pid);
1310 goto out;
1311
1312 out_free:
1313 nlmsg_free(msg);
1314
1315 out:
1316 cfg80211_put_dev(drv);
1317 dev_put(dev);
1318 return err;
1319 }
1320
1321 /*
1322 * Get vlan interface making sure it is on the right wiphy.
1323 */
1324 static int get_vlan(struct nlattr *vlanattr,
1325 struct cfg80211_registered_device *rdev,
1326 struct net_device **vlan)
1327 {
1328 *vlan = NULL;
1329
1330 if (vlanattr) {
1331 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1332 if (!*vlan)
1333 return -ENODEV;
1334 if (!(*vlan)->ieee80211_ptr)
1335 return -EINVAL;
1336 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1337 return -EINVAL;
1338 }
1339 return 0;
1340 }
1341
1342 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1343 {
1344 struct cfg80211_registered_device *drv;
1345 int err;
1346 struct net_device *dev;
1347 struct station_parameters params;
1348 u8 *mac_addr = NULL;
1349
1350 memset(&params, 0, sizeof(params));
1351
1352 params.listen_interval = -1;
1353
1354 if (info->attrs[NL80211_ATTR_STA_AID])
1355 return -EINVAL;
1356
1357 if (!info->attrs[NL80211_ATTR_MAC])
1358 return -EINVAL;
1359
1360 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1361
1362 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1363 params.supported_rates =
1364 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1365 params.supported_rates_len =
1366 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1367 }
1368
1369 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1370 params.listen_interval =
1371 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1372
1373 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1374 params.ht_capa =
1375 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1376
1377 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1378 &params.station_flags))
1379 return -EINVAL;
1380
1381 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1382 params.plink_action =
1383 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1384
1385 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1386 if (err)
1387 return err;
1388
1389 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1390 if (err)
1391 goto out;
1392
1393 if (!drv->ops->change_station) {
1394 err = -EOPNOTSUPP;
1395 goto out;
1396 }
1397
1398 rtnl_lock();
1399 err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1400 rtnl_unlock();
1401
1402 out:
1403 if (params.vlan)
1404 dev_put(params.vlan);
1405 cfg80211_put_dev(drv);
1406 dev_put(dev);
1407 return err;
1408 }
1409
1410 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1411 {
1412 struct cfg80211_registered_device *drv;
1413 int err;
1414 struct net_device *dev;
1415 struct station_parameters params;
1416 u8 *mac_addr = NULL;
1417
1418 memset(&params, 0, sizeof(params));
1419
1420 if (!info->attrs[NL80211_ATTR_MAC])
1421 return -EINVAL;
1422
1423 if (!info->attrs[NL80211_ATTR_STA_AID])
1424 return -EINVAL;
1425
1426 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1427 return -EINVAL;
1428
1429 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1430 return -EINVAL;
1431
1432 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1433 params.supported_rates =
1434 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1435 params.supported_rates_len =
1436 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1437 params.listen_interval =
1438 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1439 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1440 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1441 params.ht_capa =
1442 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1443
1444 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1445 &params.station_flags))
1446 return -EINVAL;
1447
1448 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1449 if (err)
1450 return err;
1451
1452 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1453 if (err)
1454 goto out;
1455
1456 if (!drv->ops->add_station) {
1457 err = -EOPNOTSUPP;
1458 goto out;
1459 }
1460
1461 rtnl_lock();
1462 err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1463 rtnl_unlock();
1464
1465 out:
1466 if (params.vlan)
1467 dev_put(params.vlan);
1468 cfg80211_put_dev(drv);
1469 dev_put(dev);
1470 return err;
1471 }
1472
1473 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1474 {
1475 struct cfg80211_registered_device *drv;
1476 int err;
1477 struct net_device *dev;
1478 u8 *mac_addr = NULL;
1479
1480 if (info->attrs[NL80211_ATTR_MAC])
1481 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1482
1483 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1484 if (err)
1485 return err;
1486
1487 if (!drv->ops->del_station) {
1488 err = -EOPNOTSUPP;
1489 goto out;
1490 }
1491
1492 rtnl_lock();
1493 err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1494 rtnl_unlock();
1495
1496 out:
1497 cfg80211_put_dev(drv);
1498 dev_put(dev);
1499 return err;
1500 }
1501
1502 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1503 int flags, struct net_device *dev,
1504 u8 *dst, u8 *next_hop,
1505 struct mpath_info *pinfo)
1506 {
1507 void *hdr;
1508 struct nlattr *pinfoattr;
1509
1510 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1511 if (!hdr)
1512 return -1;
1513
1514 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1515 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1516 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1517
1518 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1519 if (!pinfoattr)
1520 goto nla_put_failure;
1521 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1522 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1523 pinfo->frame_qlen);
1524 if (pinfo->filled & MPATH_INFO_DSN)
1525 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1526 pinfo->dsn);
1527 if (pinfo->filled & MPATH_INFO_METRIC)
1528 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1529 pinfo->metric);
1530 if (pinfo->filled & MPATH_INFO_EXPTIME)
1531 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1532 pinfo->exptime);
1533 if (pinfo->filled & MPATH_INFO_FLAGS)
1534 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1535 pinfo->flags);
1536 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1537 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1538 pinfo->discovery_timeout);
1539 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1540 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1541 pinfo->discovery_retries);
1542
1543 nla_nest_end(msg, pinfoattr);
1544
1545 return genlmsg_end(msg, hdr);
1546
1547 nla_put_failure:
1548 genlmsg_cancel(msg, hdr);
1549 return -EMSGSIZE;
1550 }
1551
1552 static int nl80211_dump_mpath(struct sk_buff *skb,
1553 struct netlink_callback *cb)
1554 {
1555 struct mpath_info pinfo;
1556 struct cfg80211_registered_device *dev;
1557 struct net_device *netdev;
1558 u8 dst[ETH_ALEN];
1559 u8 next_hop[ETH_ALEN];
1560 int ifidx = cb->args[0];
1561 int path_idx = cb->args[1];
1562 int err;
1563
1564 if (!ifidx) {
1565 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1566 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1567 nl80211_policy);
1568 if (err)
1569 return err;
1570
1571 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1572 return -EINVAL;
1573
1574 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1575 if (!ifidx)
1576 return -EINVAL;
1577 }
1578
1579 netdev = dev_get_by_index(&init_net, ifidx);
1580 if (!netdev)
1581 return -ENODEV;
1582
1583 dev = cfg80211_get_dev_from_ifindex(ifidx);
1584 if (IS_ERR(dev)) {
1585 err = PTR_ERR(dev);
1586 goto out_put_netdev;
1587 }
1588
1589 if (!dev->ops->dump_mpath) {
1590 err = -ENOSYS;
1591 goto out_err;
1592 }
1593
1594 rtnl_lock();
1595
1596 while (1) {
1597 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1598 dst, next_hop, &pinfo);
1599 if (err == -ENOENT)
1600 break;
1601 if (err)
1602 goto out_err_rtnl;
1603
1604 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1605 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1606 netdev, dst, next_hop,
1607 &pinfo) < 0)
1608 goto out;
1609
1610 path_idx++;
1611 }
1612
1613
1614 out:
1615 cb->args[1] = path_idx;
1616 err = skb->len;
1617 out_err_rtnl:
1618 rtnl_unlock();
1619 out_err:
1620 cfg80211_put_dev(dev);
1621 out_put_netdev:
1622 dev_put(netdev);
1623
1624 return err;
1625 }
1626
1627 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1628 {
1629 struct cfg80211_registered_device *drv;
1630 int err;
1631 struct net_device *dev;
1632 struct mpath_info pinfo;
1633 struct sk_buff *msg;
1634 u8 *dst = NULL;
1635 u8 next_hop[ETH_ALEN];
1636
1637 memset(&pinfo, 0, sizeof(pinfo));
1638
1639 if (!info->attrs[NL80211_ATTR_MAC])
1640 return -EINVAL;
1641
1642 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1643
1644 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1645 if (err)
1646 return err;
1647
1648 if (!drv->ops->get_mpath) {
1649 err = -EOPNOTSUPP;
1650 goto out;
1651 }
1652
1653 rtnl_lock();
1654 err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1655 rtnl_unlock();
1656
1657 if (err)
1658 goto out;
1659
1660 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1661 if (!msg)
1662 goto out;
1663
1664 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1665 dev, dst, next_hop, &pinfo) < 0)
1666 goto out_free;
1667
1668 err = genlmsg_unicast(msg, info->snd_pid);
1669 goto out;
1670
1671 out_free:
1672 nlmsg_free(msg);
1673
1674 out:
1675 cfg80211_put_dev(drv);
1676 dev_put(dev);
1677 return err;
1678 }
1679
1680 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
1681 {
1682 struct cfg80211_registered_device *drv;
1683 int err;
1684 struct net_device *dev;
1685 u8 *dst = NULL;
1686 u8 *next_hop = NULL;
1687
1688 if (!info->attrs[NL80211_ATTR_MAC])
1689 return -EINVAL;
1690
1691 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1692 return -EINVAL;
1693
1694 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1695 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1696
1697 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1698 if (err)
1699 return err;
1700
1701 if (!drv->ops->change_mpath) {
1702 err = -EOPNOTSUPP;
1703 goto out;
1704 }
1705
1706 rtnl_lock();
1707 err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
1708 rtnl_unlock();
1709
1710 out:
1711 cfg80211_put_dev(drv);
1712 dev_put(dev);
1713 return err;
1714 }
1715 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
1716 {
1717 struct cfg80211_registered_device *drv;
1718 int err;
1719 struct net_device *dev;
1720 u8 *dst = NULL;
1721 u8 *next_hop = NULL;
1722
1723 if (!info->attrs[NL80211_ATTR_MAC])
1724 return -EINVAL;
1725
1726 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1727 return -EINVAL;
1728
1729 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1730 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1731
1732 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1733 if (err)
1734 return err;
1735
1736 if (!drv->ops->add_mpath) {
1737 err = -EOPNOTSUPP;
1738 goto out;
1739 }
1740
1741 rtnl_lock();
1742 err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
1743 rtnl_unlock();
1744
1745 out:
1746 cfg80211_put_dev(drv);
1747 dev_put(dev);
1748 return err;
1749 }
1750
1751 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
1752 {
1753 struct cfg80211_registered_device *drv;
1754 int err;
1755 struct net_device *dev;
1756 u8 *dst = NULL;
1757
1758 if (info->attrs[NL80211_ATTR_MAC])
1759 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1760
1761 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1762 if (err)
1763 return err;
1764
1765 if (!drv->ops->del_mpath) {
1766 err = -EOPNOTSUPP;
1767 goto out;
1768 }
1769
1770 rtnl_lock();
1771 err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
1772 rtnl_unlock();
1773
1774 out:
1775 cfg80211_put_dev(drv);
1776 dev_put(dev);
1777 return err;
1778 }
1779
1780 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
1781 {
1782 struct cfg80211_registered_device *drv;
1783 int err;
1784 struct net_device *dev;
1785 struct bss_parameters params;
1786
1787 memset(&params, 0, sizeof(params));
1788 /* default to not changing parameters */
1789 params.use_cts_prot = -1;
1790 params.use_short_preamble = -1;
1791 params.use_short_slot_time = -1;
1792
1793 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
1794 params.use_cts_prot =
1795 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
1796 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
1797 params.use_short_preamble =
1798 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
1799 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
1800 params.use_short_slot_time =
1801 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
1802 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
1803 params.basic_rates =
1804 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
1805 params.basic_rates_len =
1806 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
1807 }
1808
1809 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1810 if (err)
1811 return err;
1812
1813 if (!drv->ops->change_bss) {
1814 err = -EOPNOTSUPP;
1815 goto out;
1816 }
1817
1818 rtnl_lock();
1819 err = drv->ops->change_bss(&drv->wiphy, dev, &params);
1820 rtnl_unlock();
1821
1822 out:
1823 cfg80211_put_dev(drv);
1824 dev_put(dev);
1825 return err;
1826 }
1827
1828 static const struct nla_policy
1829 reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
1830 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
1831 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
1832 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
1833 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
1834 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
1835 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
1836 };
1837
1838 static int parse_reg_rule(struct nlattr *tb[],
1839 struct ieee80211_reg_rule *reg_rule)
1840 {
1841 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
1842 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
1843
1844 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
1845 return -EINVAL;
1846 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
1847 return -EINVAL;
1848 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
1849 return -EINVAL;
1850 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
1851 return -EINVAL;
1852 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
1853 return -EINVAL;
1854
1855 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
1856
1857 freq_range->start_freq_khz =
1858 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
1859 freq_range->end_freq_khz =
1860 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
1861 freq_range->max_bandwidth_khz =
1862 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
1863
1864 power_rule->max_eirp =
1865 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
1866
1867 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
1868 power_rule->max_antenna_gain =
1869 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
1870
1871 return 0;
1872 }
1873
1874 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
1875 {
1876 int r;
1877 char *data = NULL;
1878
1879 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
1880 return -EINVAL;
1881
1882 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
1883
1884 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
1885 /* We ignore world regdom requests with the old regdom setup */
1886 if (is_world_regdom(data))
1887 return -EINVAL;
1888 #endif
1889 mutex_lock(&cfg80211_drv_mutex);
1890 r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, 0, ENVIRON_ANY);
1891 mutex_unlock(&cfg80211_drv_mutex);
1892 return r;
1893 }
1894
1895 static int nl80211_get_mesh_params(struct sk_buff *skb,
1896 struct genl_info *info)
1897 {
1898 struct cfg80211_registered_device *drv;
1899 struct mesh_config cur_params;
1900 int err;
1901 struct net_device *dev;
1902 void *hdr;
1903 struct nlattr *pinfoattr;
1904 struct sk_buff *msg;
1905
1906 /* Look up our device */
1907 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1908 if (err)
1909 return err;
1910
1911 if (!drv->ops->get_mesh_params) {
1912 err = -EOPNOTSUPP;
1913 goto out;
1914 }
1915
1916 /* Get the mesh params */
1917 rtnl_lock();
1918 err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params);
1919 rtnl_unlock();
1920 if (err)
1921 goto out;
1922
1923 /* Draw up a netlink message to send back */
1924 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1925 if (!msg) {
1926 err = -ENOBUFS;
1927 goto out;
1928 }
1929 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1930 NL80211_CMD_GET_MESH_PARAMS);
1931 if (!hdr)
1932 goto nla_put_failure;
1933 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
1934 if (!pinfoattr)
1935 goto nla_put_failure;
1936 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1937 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
1938 cur_params.dot11MeshRetryTimeout);
1939 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
1940 cur_params.dot11MeshConfirmTimeout);
1941 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
1942 cur_params.dot11MeshHoldingTimeout);
1943 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
1944 cur_params.dot11MeshMaxPeerLinks);
1945 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
1946 cur_params.dot11MeshMaxRetries);
1947 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
1948 cur_params.dot11MeshTTL);
1949 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
1950 cur_params.auto_open_plinks);
1951 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
1952 cur_params.dot11MeshHWMPmaxPREQretries);
1953 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
1954 cur_params.path_refresh_time);
1955 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
1956 cur_params.min_discovery_timeout);
1957 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
1958 cur_params.dot11MeshHWMPactivePathTimeout);
1959 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
1960 cur_params.dot11MeshHWMPpreqMinInterval);
1961 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1962 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
1963 nla_nest_end(msg, pinfoattr);
1964 genlmsg_end(msg, hdr);
1965 err = genlmsg_unicast(msg, info->snd_pid);
1966 goto out;
1967
1968 nla_put_failure:
1969 genlmsg_cancel(msg, hdr);
1970 err = -EMSGSIZE;
1971 out:
1972 /* Cleanup */
1973 cfg80211_put_dev(drv);
1974 dev_put(dev);
1975 return err;
1976 }
1977
1978 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
1979 do {\
1980 if (table[attr_num]) {\
1981 cfg.param = nla_fn(table[attr_num]); \
1982 mask |= (1 << (attr_num - 1)); \
1983 } \
1984 } while (0);\
1985
1986 static struct nla_policy
1987 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
1988 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
1989 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
1990 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
1991 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
1992 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
1993 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
1994 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
1995
1996 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
1997 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
1998 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
1999 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2000 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2001 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2002 };
2003
2004 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2005 {
2006 int err;
2007 u32 mask;
2008 struct cfg80211_registered_device *drv;
2009 struct net_device *dev;
2010 struct mesh_config cfg;
2011 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2012 struct nlattr *parent_attr;
2013
2014 parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2015 if (!parent_attr)
2016 return -EINVAL;
2017 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2018 parent_attr, nl80211_meshconf_params_policy))
2019 return -EINVAL;
2020
2021 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2022 if (err)
2023 return err;
2024
2025 if (!drv->ops->set_mesh_params) {
2026 err = -EOPNOTSUPP;
2027 goto out;
2028 }
2029
2030 /* This makes sure that there aren't more than 32 mesh config
2031 * parameters (otherwise our bitfield scheme would not work.) */
2032 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2033
2034 /* Fill in the params struct */
2035 mask = 0;
2036 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2037 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2038 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2039 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2040 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2041 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2042 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2043 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2044 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2045 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2046 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2047 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2048 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2049 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2050 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2051 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2052 nla_get_u8);
2053 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2054 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2055 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2056 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2057 nla_get_u16);
2058 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2059 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2060 nla_get_u32);
2061 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2062 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2063 nla_get_u16);
2064 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2065 dot11MeshHWMPnetDiameterTraversalTime,
2066 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2067 nla_get_u16);
2068
2069 /* Apply changes */
2070 rtnl_lock();
2071 err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask);
2072 rtnl_unlock();
2073
2074 out:
2075 /* cleanup */
2076 cfg80211_put_dev(drv);
2077 dev_put(dev);
2078 return err;
2079 }
2080
2081 #undef FILL_IN_MESH_PARAM_IF_SET
2082
2083 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2084 {
2085 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2086 struct nlattr *nl_reg_rule;
2087 char *alpha2 = NULL;
2088 int rem_reg_rules = 0, r = 0;
2089 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2090 struct ieee80211_regdomain *rd = NULL;
2091
2092 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2093 return -EINVAL;
2094
2095 if (!info->attrs[NL80211_ATTR_REG_RULES])
2096 return -EINVAL;
2097
2098 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2099
2100 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2101 rem_reg_rules) {
2102 num_rules++;
2103 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2104 goto bad_reg;
2105 }
2106
2107 if (!reg_is_valid_request(alpha2))
2108 return -EINVAL;
2109
2110 size_of_regd = sizeof(struct ieee80211_regdomain) +
2111 (num_rules * sizeof(struct ieee80211_reg_rule));
2112
2113 rd = kzalloc(size_of_regd, GFP_KERNEL);
2114 if (!rd)
2115 return -ENOMEM;
2116
2117 rd->n_reg_rules = num_rules;
2118 rd->alpha2[0] = alpha2[0];
2119 rd->alpha2[1] = alpha2[1];
2120
2121 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2122 rem_reg_rules) {
2123 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2124 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2125 reg_rule_policy);
2126 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2127 if (r)
2128 goto bad_reg;
2129
2130 rule_idx++;
2131
2132 if (rule_idx > NL80211_MAX_SUPP_REG_RULES)
2133 goto bad_reg;
2134 }
2135
2136 BUG_ON(rule_idx != num_rules);
2137
2138 mutex_lock(&cfg80211_drv_mutex);
2139 r = set_regdom(rd);
2140 mutex_unlock(&cfg80211_drv_mutex);
2141 return r;
2142
2143 bad_reg:
2144 kfree(rd);
2145 return -EINVAL;
2146 }
2147
2148 static struct genl_ops nl80211_ops[] = {
2149 {
2150 .cmd = NL80211_CMD_GET_WIPHY,
2151 .doit = nl80211_get_wiphy,
2152 .dumpit = nl80211_dump_wiphy,
2153 .policy = nl80211_policy,
2154 /* can be retrieved by unprivileged users */
2155 },
2156 {
2157 .cmd = NL80211_CMD_SET_WIPHY,
2158 .doit = nl80211_set_wiphy,
2159 .policy = nl80211_policy,
2160 .flags = GENL_ADMIN_PERM,
2161 },
2162 {
2163 .cmd = NL80211_CMD_GET_INTERFACE,
2164 .doit = nl80211_get_interface,
2165 .dumpit = nl80211_dump_interface,
2166 .policy = nl80211_policy,
2167 /* can be retrieved by unprivileged users */
2168 },
2169 {
2170 .cmd = NL80211_CMD_SET_INTERFACE,
2171 .doit = nl80211_set_interface,
2172 .policy = nl80211_policy,
2173 .flags = GENL_ADMIN_PERM,
2174 },
2175 {
2176 .cmd = NL80211_CMD_NEW_INTERFACE,
2177 .doit = nl80211_new_interface,
2178 .policy = nl80211_policy,
2179 .flags = GENL_ADMIN_PERM,
2180 },
2181 {
2182 .cmd = NL80211_CMD_DEL_INTERFACE,
2183 .doit = nl80211_del_interface,
2184 .policy = nl80211_policy,
2185 .flags = GENL_ADMIN_PERM,
2186 },
2187 {
2188 .cmd = NL80211_CMD_GET_KEY,
2189 .doit = nl80211_get_key,
2190 .policy = nl80211_policy,
2191 .flags = GENL_ADMIN_PERM,
2192 },
2193 {
2194 .cmd = NL80211_CMD_SET_KEY,
2195 .doit = nl80211_set_key,
2196 .policy = nl80211_policy,
2197 .flags = GENL_ADMIN_PERM,
2198 },
2199 {
2200 .cmd = NL80211_CMD_NEW_KEY,
2201 .doit = nl80211_new_key,
2202 .policy = nl80211_policy,
2203 .flags = GENL_ADMIN_PERM,
2204 },
2205 {
2206 .cmd = NL80211_CMD_DEL_KEY,
2207 .doit = nl80211_del_key,
2208 .policy = nl80211_policy,
2209 .flags = GENL_ADMIN_PERM,
2210 },
2211 {
2212 .cmd = NL80211_CMD_SET_BEACON,
2213 .policy = nl80211_policy,
2214 .flags = GENL_ADMIN_PERM,
2215 .doit = nl80211_addset_beacon,
2216 },
2217 {
2218 .cmd = NL80211_CMD_NEW_BEACON,
2219 .policy = nl80211_policy,
2220 .flags = GENL_ADMIN_PERM,
2221 .doit = nl80211_addset_beacon,
2222 },
2223 {
2224 .cmd = NL80211_CMD_DEL_BEACON,
2225 .policy = nl80211_policy,
2226 .flags = GENL_ADMIN_PERM,
2227 .doit = nl80211_del_beacon,
2228 },
2229 {
2230 .cmd = NL80211_CMD_GET_STATION,
2231 .doit = nl80211_get_station,
2232 .dumpit = nl80211_dump_station,
2233 .policy = nl80211_policy,
2234 .flags = GENL_ADMIN_PERM,
2235 },
2236 {
2237 .cmd = NL80211_CMD_SET_STATION,
2238 .doit = nl80211_set_station,
2239 .policy = nl80211_policy,
2240 .flags = GENL_ADMIN_PERM,
2241 },
2242 {
2243 .cmd = NL80211_CMD_NEW_STATION,
2244 .doit = nl80211_new_station,
2245 .policy = nl80211_policy,
2246 .flags = GENL_ADMIN_PERM,
2247 },
2248 {
2249 .cmd = NL80211_CMD_DEL_STATION,
2250 .doit = nl80211_del_station,
2251 .policy = nl80211_policy,
2252 .flags = GENL_ADMIN_PERM,
2253 },
2254 {
2255 .cmd = NL80211_CMD_GET_MPATH,
2256 .doit = nl80211_get_mpath,
2257 .dumpit = nl80211_dump_mpath,
2258 .policy = nl80211_policy,
2259 .flags = GENL_ADMIN_PERM,
2260 },
2261 {
2262 .cmd = NL80211_CMD_SET_MPATH,
2263 .doit = nl80211_set_mpath,
2264 .policy = nl80211_policy,
2265 .flags = GENL_ADMIN_PERM,
2266 },
2267 {
2268 .cmd = NL80211_CMD_NEW_MPATH,
2269 .doit = nl80211_new_mpath,
2270 .policy = nl80211_policy,
2271 .flags = GENL_ADMIN_PERM,
2272 },
2273 {
2274 .cmd = NL80211_CMD_DEL_MPATH,
2275 .doit = nl80211_del_mpath,
2276 .policy = nl80211_policy,
2277 .flags = GENL_ADMIN_PERM,
2278 },
2279 {
2280 .cmd = NL80211_CMD_SET_BSS,
2281 .doit = nl80211_set_bss,
2282 .policy = nl80211_policy,
2283 .flags = GENL_ADMIN_PERM,
2284 },
2285 {
2286 .cmd = NL80211_CMD_SET_REG,
2287 .doit = nl80211_set_reg,
2288 .policy = nl80211_policy,
2289 .flags = GENL_ADMIN_PERM,
2290 },
2291 {
2292 .cmd = NL80211_CMD_REQ_SET_REG,
2293 .doit = nl80211_req_set_reg,
2294 .policy = nl80211_policy,
2295 .flags = GENL_ADMIN_PERM,
2296 },
2297 {
2298 .cmd = NL80211_CMD_GET_MESH_PARAMS,
2299 .doit = nl80211_get_mesh_params,
2300 .policy = nl80211_policy,
2301 /* can be retrieved by unprivileged users */
2302 },
2303 {
2304 .cmd = NL80211_CMD_SET_MESH_PARAMS,
2305 .doit = nl80211_set_mesh_params,
2306 .policy = nl80211_policy,
2307 .flags = GENL_ADMIN_PERM,
2308 },
2309 };
2310
2311 /* multicast groups */
2312 static struct genl_multicast_group nl80211_config_mcgrp = {
2313 .name = "config",
2314 };
2315
2316 /* notification functions */
2317
2318 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
2319 {
2320 struct sk_buff *msg;
2321
2322 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2323 if (!msg)
2324 return;
2325
2326 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
2327 nlmsg_free(msg);
2328 return;
2329 }
2330
2331 genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
2332 }
2333
2334 /* initialisation/exit functions */
2335
2336 int nl80211_init(void)
2337 {
2338 int err, i;
2339
2340 err = genl_register_family(&nl80211_fam);
2341 if (err)
2342 return err;
2343
2344 for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
2345 err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
2346 if (err)
2347 goto err_out;
2348 }
2349
2350 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
2351 if (err)
2352 goto err_out;
2353
2354 return 0;
2355 err_out:
2356 genl_unregister_family(&nl80211_fam);
2357 return err;
2358 }
2359
2360 void nl80211_exit(void)
2361 {
2362 genl_unregister_family(&nl80211_fam);
2363 }
Nao low-level kernelspace/userspace library that runs on our robots, Nao-Team HTWK