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nl80211: remove admin requirement from station get
[linux/fpc-iii.git] / net / wireless / nl80211.c
blob245fddcc77c31438aa5788e142c4cc3a71df51ab
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 <linux/etherdevice.h>
18 #include <net/genetlink.h>
19 #include <net/cfg80211.h>
20 #include "core.h"
21 #include "nl80211.h"
22 #include "reg.h"
23
24 /* the netlink family */
25 static struct genl_family nl80211_fam = {
26 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
27 .name = "nl80211", /* have users key off the name instead */
28 .hdrsize = 0, /* no private header */
29 .version = 1, /* no particular meaning now */
30 .maxattr = NL80211_ATTR_MAX,
31 };
32
33 /* internal helper: get drv and dev */
34 static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
35 struct cfg80211_registered_device **drv,
36 struct net_device **dev)
37 {
38 int ifindex;
39
40 if (!attrs[NL80211_ATTR_IFINDEX])
41 return -EINVAL;
42
43 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
44 *dev = dev_get_by_index(&init_net, ifindex);
45 if (!*dev)
46 return -ENODEV;
47
48 *drv = cfg80211_get_dev_from_ifindex(ifindex);
49 if (IS_ERR(*drv)) {
50 dev_put(*dev);
51 return PTR_ERR(*drv);
52 }
53
54 return 0;
55 }
56
57 /* policy for the attributes */
58 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
59 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
60 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
61 .len = BUS_ID_SIZE-1 },
62 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
63 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
64 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
65
66 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
67 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
68 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
69
70 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
71
72 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
73 .len = WLAN_MAX_KEY_LEN },
74 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
75 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
76 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
77
78 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
79 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
80 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
81 .len = IEEE80211_MAX_DATA_LEN },
82 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
83 .len = IEEE80211_MAX_DATA_LEN },
84 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
85 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
86 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
87 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
88 .len = NL80211_MAX_SUPP_RATES },
89 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
90 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
91 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
92 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
93 .len = IEEE80211_MAX_MESH_ID_LEN },
94 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
95
96 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
97 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
98
99 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
100 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
101 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
102 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
103 .len = NL80211_MAX_SUPP_RATES },
104
105 [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
106
107 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
108 .len = NL80211_HT_CAPABILITY_LEN },
109
110 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
111 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
112 .len = IEEE80211_MAX_DATA_LEN },
113 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
114 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
115 };
116
117 /* message building helper */
118 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
119 int flags, u8 cmd)
120 {
121 /* since there is no private header just add the generic one */
122 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
123 }
124
125 /* netlink command implementations */
126
127 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
128 struct cfg80211_registered_device *dev)
129 {
130 void *hdr;
131 struct nlattr *nl_bands, *nl_band;
132 struct nlattr *nl_freqs, *nl_freq;
133 struct nlattr *nl_rates, *nl_rate;
134 struct nlattr *nl_modes;
135 enum ieee80211_band band;
136 struct ieee80211_channel *chan;
137 struct ieee80211_rate *rate;
138 int i;
139 u16 ifmodes = dev->wiphy.interface_modes;
140
141 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
142 if (!hdr)
143 return -1;
144
145 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx);
146 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
147 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
148 dev->wiphy.max_scan_ssids);
149
150 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
151 if (!nl_modes)
152 goto nla_put_failure;
153
154 i = 0;
155 while (ifmodes) {
156 if (ifmodes & 1)
157 NLA_PUT_FLAG(msg, i);
158 ifmodes >>= 1;
159 i++;
160 }
161
162 nla_nest_end(msg, nl_modes);
163
164 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
165 if (!nl_bands)
166 goto nla_put_failure;
167
168 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
169 if (!dev->wiphy.bands[band])
170 continue;
171
172 nl_band = nla_nest_start(msg, band);
173 if (!nl_band)
174 goto nla_put_failure;
175
176 /* add HT info */
177 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
178 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
179 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
180 &dev->wiphy.bands[band]->ht_cap.mcs);
181 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
182 dev->wiphy.bands[band]->ht_cap.cap);
183 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
184 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
185 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
186 dev->wiphy.bands[band]->ht_cap.ampdu_density);
187 }
188
189 /* add frequencies */
190 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
191 if (!nl_freqs)
192 goto nla_put_failure;
193
194 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
195 nl_freq = nla_nest_start(msg, i);
196 if (!nl_freq)
197 goto nla_put_failure;
198
199 chan = &dev->wiphy.bands[band]->channels[i];
200 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
201 chan->center_freq);
202
203 if (chan->flags & IEEE80211_CHAN_DISABLED)
204 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
205 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
206 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
207 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
208 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
209 if (chan->flags & IEEE80211_CHAN_RADAR)
210 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
211
212 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
213 DBM_TO_MBM(chan->max_power));
214
215 nla_nest_end(msg, nl_freq);
216 }
217
218 nla_nest_end(msg, nl_freqs);
219
220 /* add bitrates */
221 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
222 if (!nl_rates)
223 goto nla_put_failure;
224
225 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
226 nl_rate = nla_nest_start(msg, i);
227 if (!nl_rate)
228 goto nla_put_failure;
229
230 rate = &dev->wiphy.bands[band]->bitrates[i];
231 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
232 rate->bitrate);
233 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
234 NLA_PUT_FLAG(msg,
235 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
236
237 nla_nest_end(msg, nl_rate);
238 }
239
240 nla_nest_end(msg, nl_rates);
241
242 nla_nest_end(msg, nl_band);
243 }
244 nla_nest_end(msg, nl_bands);
245
246 return genlmsg_end(msg, hdr);
247
248 nla_put_failure:
249 genlmsg_cancel(msg, hdr);
250 return -EMSGSIZE;
251 }
252
253 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
254 {
255 int idx = 0;
256 int start = cb->args[0];
257 struct cfg80211_registered_device *dev;
258
259 mutex_lock(&cfg80211_drv_mutex);
260 list_for_each_entry(dev, &cfg80211_drv_list, list) {
261 if (++idx <= start)
262 continue;
263 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
264 cb->nlh->nlmsg_seq, NLM_F_MULTI,
265 dev) < 0) {
266 idx--;
267 break;
268 }
269 }
270 mutex_unlock(&cfg80211_drv_mutex);
271
272 cb->args[0] = idx;
273
274 return skb->len;
275 }
276
277 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
278 {
279 struct sk_buff *msg;
280 struct cfg80211_registered_device *dev;
281
282 dev = cfg80211_get_dev_from_info(info);
283 if (IS_ERR(dev))
284 return PTR_ERR(dev);
285
286 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
287 if (!msg)
288 goto out_err;
289
290 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
291 goto out_free;
292
293 cfg80211_put_dev(dev);
294
295 return genlmsg_unicast(msg, info->snd_pid);
296
297 out_free:
298 nlmsg_free(msg);
299 out_err:
300 cfg80211_put_dev(dev);
301 return -ENOBUFS;
302 }
303
304 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
305 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
306 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
307 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
308 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
309 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
310 };
311
312 static int parse_txq_params(struct nlattr *tb[],
313 struct ieee80211_txq_params *txq_params)
314 {
315 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
316 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
317 !tb[NL80211_TXQ_ATTR_AIFS])
318 return -EINVAL;
319
320 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
321 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
322 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
323 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
324 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
325
326 return 0;
327 }
328
329 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
330 {
331 struct cfg80211_registered_device *rdev;
332 int result = 0, rem_txq_params = 0;
333 struct nlattr *nl_txq_params;
334
335 rdev = cfg80211_get_dev_from_info(info);
336 if (IS_ERR(rdev))
337 return PTR_ERR(rdev);
338
339 if (info->attrs[NL80211_ATTR_WIPHY_NAME]) {
340 result = cfg80211_dev_rename(
341 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
342 if (result)
343 goto bad_res;
344 }
345
346 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
347 struct ieee80211_txq_params txq_params;
348 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
349
350 if (!rdev->ops->set_txq_params) {
351 result = -EOPNOTSUPP;
352 goto bad_res;
353 }
354
355 nla_for_each_nested(nl_txq_params,
356 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
357 rem_txq_params) {
358 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
359 nla_data(nl_txq_params),
360 nla_len(nl_txq_params),
361 txq_params_policy);
362 result = parse_txq_params(tb, &txq_params);
363 if (result)
364 goto bad_res;
365
366 result = rdev->ops->set_txq_params(&rdev->wiphy,
367 &txq_params);
368 if (result)
369 goto bad_res;
370 }
371 }
372
373 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
374 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
375 struct ieee80211_channel *chan;
376 struct ieee80211_sta_ht_cap *ht_cap;
377 u32 freq, sec_freq;
378
379 if (!rdev->ops->set_channel) {
380 result = -EOPNOTSUPP;
381 goto bad_res;
382 }
383
384 result = -EINVAL;
385
386 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
387 channel_type = nla_get_u32(info->attrs[
388 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
389 if (channel_type != NL80211_CHAN_NO_HT &&
390 channel_type != NL80211_CHAN_HT20 &&
391 channel_type != NL80211_CHAN_HT40PLUS &&
392 channel_type != NL80211_CHAN_HT40MINUS)
393 goto bad_res;
394 }
395
396 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
397 chan = ieee80211_get_channel(&rdev->wiphy, freq);
398
399 /* Primary channel not allowed */
400 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
401 goto bad_res;
402
403 if (channel_type == NL80211_CHAN_HT40MINUS)
404 sec_freq = freq - 20;
405 else if (channel_type == NL80211_CHAN_HT40PLUS)
406 sec_freq = freq + 20;
407 else
408 sec_freq = 0;
409
410 ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
411
412 /* no HT capabilities */
413 if (channel_type != NL80211_CHAN_NO_HT &&
414 !ht_cap->ht_supported)
415 goto bad_res;
416
417 if (sec_freq) {
418 struct ieee80211_channel *schan;
419
420 /* no 40 MHz capabilities */
421 if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
422 (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
423 goto bad_res;
424
425 schan = ieee80211_get_channel(&rdev->wiphy, sec_freq);
426
427 /* Secondary channel not allowed */
428 if (!schan || schan->flags & IEEE80211_CHAN_DISABLED)
429 goto bad_res;
430 }
431
432 result = rdev->ops->set_channel(&rdev->wiphy, chan,
433 channel_type);
434 if (result)
435 goto bad_res;
436 }
437
438
439 bad_res:
440 cfg80211_put_dev(rdev);
441 return result;
442 }
443
444
445 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
446 struct net_device *dev)
447 {
448 void *hdr;
449
450 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
451 if (!hdr)
452 return -1;
453
454 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
455 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
456 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
457 return genlmsg_end(msg, hdr);
458
459 nla_put_failure:
460 genlmsg_cancel(msg, hdr);
461 return -EMSGSIZE;
462 }
463
464 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
465 {
466 int wp_idx = 0;
467 int if_idx = 0;
468 int wp_start = cb->args[0];
469 int if_start = cb->args[1];
470 struct cfg80211_registered_device *dev;
471 struct wireless_dev *wdev;
472
473 mutex_lock(&cfg80211_drv_mutex);
474 list_for_each_entry(dev, &cfg80211_drv_list, list) {
475 if (wp_idx < wp_start) {
476 wp_idx++;
477 continue;
478 }
479 if_idx = 0;
480
481 mutex_lock(&dev->devlist_mtx);
482 list_for_each_entry(wdev, &dev->netdev_list, list) {
483 if (if_idx < if_start) {
484 if_idx++;
485 continue;
486 }
487 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
488 cb->nlh->nlmsg_seq, NLM_F_MULTI,
489 wdev->netdev) < 0) {
490 mutex_unlock(&dev->devlist_mtx);
491 goto out;
492 }
493 if_idx++;
494 }
495 mutex_unlock(&dev->devlist_mtx);
496
497 wp_idx++;
498 }
499 out:
500 mutex_unlock(&cfg80211_drv_mutex);
501
502 cb->args[0] = wp_idx;
503 cb->args[1] = if_idx;
504
505 return skb->len;
506 }
507
508 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
509 {
510 struct sk_buff *msg;
511 struct cfg80211_registered_device *dev;
512 struct net_device *netdev;
513 int err;
514
515 err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
516 if (err)
517 return err;
518
519 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
520 if (!msg)
521 goto out_err;
522
523 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
524 goto out_free;
525
526 dev_put(netdev);
527 cfg80211_put_dev(dev);
528
529 return genlmsg_unicast(msg, info->snd_pid);
530
531 out_free:
532 nlmsg_free(msg);
533 out_err:
534 dev_put(netdev);
535 cfg80211_put_dev(dev);
536 return -ENOBUFS;
537 }
538
539 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
540 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
541 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
542 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
543 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
544 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
545 };
546
547 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
548 {
549 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
550 int flag;
551
552 *mntrflags = 0;
553
554 if (!nla)
555 return -EINVAL;
556
557 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
558 nla, mntr_flags_policy))
559 return -EINVAL;
560
561 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
562 if (flags[flag])
563 *mntrflags |= (1<<flag);
564
565 return 0;
566 }
567
568 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
569 {
570 struct cfg80211_registered_device *drv;
571 struct vif_params params;
572 int err, ifindex;
573 enum nl80211_iftype type;
574 struct net_device *dev;
575 u32 _flags, *flags = NULL;
576
577 memset(&params, 0, sizeof(params));
578
579 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
580 if (err)
581 return err;
582 ifindex = dev->ifindex;
583 type = dev->ieee80211_ptr->iftype;
584 dev_put(dev);
585
586 err = -EINVAL;
587 if (info->attrs[NL80211_ATTR_IFTYPE]) {
588 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
589 if (type > NL80211_IFTYPE_MAX)
590 goto unlock;
591 }
592
593 if (!drv->ops->change_virtual_intf ||
594 !(drv->wiphy.interface_modes & (1 << type))) {
595 err = -EOPNOTSUPP;
596 goto unlock;
597 }
598
599 if (info->attrs[NL80211_ATTR_MESH_ID]) {
600 if (type != NL80211_IFTYPE_MESH_POINT) {
601 err = -EINVAL;
602 goto unlock;
603 }
604 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
605 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
606 }
607
608 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
609 if (type != NL80211_IFTYPE_MONITOR) {
610 err = -EINVAL;
611 goto unlock;
612 }
613 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
614 &_flags);
615 if (!err)
616 flags = &_flags;
617 }
618 rtnl_lock();
619 err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
620 type, flags, &params);
621
622 dev = __dev_get_by_index(&init_net, ifindex);
623 WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));
624
625 rtnl_unlock();
626
627 unlock:
628 cfg80211_put_dev(drv);
629 return err;
630 }
631
632 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
633 {
634 struct cfg80211_registered_device *drv;
635 struct vif_params params;
636 int err;
637 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
638 u32 flags;
639
640 memset(&params, 0, sizeof(params));
641
642 if (!info->attrs[NL80211_ATTR_IFNAME])
643 return -EINVAL;
644
645 if (info->attrs[NL80211_ATTR_IFTYPE]) {
646 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
647 if (type > NL80211_IFTYPE_MAX)
648 return -EINVAL;
649 }
650
651 drv = cfg80211_get_dev_from_info(info);
652 if (IS_ERR(drv))
653 return PTR_ERR(drv);
654
655 if (!drv->ops->add_virtual_intf ||
656 !(drv->wiphy.interface_modes & (1 << type))) {
657 err = -EOPNOTSUPP;
658 goto unlock;
659 }
660
661 if (type == NL80211_IFTYPE_MESH_POINT &&
662 info->attrs[NL80211_ATTR_MESH_ID]) {
663 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
664 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
665 }
666
667 rtnl_lock();
668 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
669 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
670 &flags);
671 err = drv->ops->add_virtual_intf(&drv->wiphy,
672 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
673 type, err ? NULL : &flags, &params);
674 rtnl_unlock();
675
676
677 unlock:
678 cfg80211_put_dev(drv);
679 return err;
680 }
681
682 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
683 {
684 struct cfg80211_registered_device *drv;
685 int ifindex, err;
686 struct net_device *dev;
687
688 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
689 if (err)
690 return err;
691 ifindex = dev->ifindex;
692 dev_put(dev);
693
694 if (!drv->ops->del_virtual_intf) {
695 err = -EOPNOTSUPP;
696 goto out;
697 }
698
699 rtnl_lock();
700 err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
701 rtnl_unlock();
702
703 out:
704 cfg80211_put_dev(drv);
705 return err;
706 }
707
708 struct get_key_cookie {
709 struct sk_buff *msg;
710 int error;
711 };
712
713 static void get_key_callback(void *c, struct key_params *params)
714 {
715 struct get_key_cookie *cookie = c;
716
717 if (params->key)
718 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
719 params->key_len, params->key);
720
721 if (params->seq)
722 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
723 params->seq_len, params->seq);
724
725 if (params->cipher)
726 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
727 params->cipher);
728
729 return;
730 nla_put_failure:
731 cookie->error = 1;
732 }
733
734 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
735 {
736 struct cfg80211_registered_device *drv;
737 int err;
738 struct net_device *dev;
739 u8 key_idx = 0;
740 u8 *mac_addr = NULL;
741 struct get_key_cookie cookie = {
742 .error = 0,
743 };
744 void *hdr;
745 struct sk_buff *msg;
746
747 if (info->attrs[NL80211_ATTR_KEY_IDX])
748 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
749
750 if (key_idx > 5)
751 return -EINVAL;
752
753 if (info->attrs[NL80211_ATTR_MAC])
754 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
755
756 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
757 if (err)
758 return err;
759
760 if (!drv->ops->get_key) {
761 err = -EOPNOTSUPP;
762 goto out;
763 }
764
765 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
766 if (!msg) {
767 err = -ENOMEM;
768 goto out;
769 }
770
771 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
772 NL80211_CMD_NEW_KEY);
773
774 if (IS_ERR(hdr)) {
775 err = PTR_ERR(hdr);
776 goto out;
777 }
778
779 cookie.msg = msg;
780
781 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
782 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
783 if (mac_addr)
784 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
785
786 rtnl_lock();
787 err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
788 &cookie, get_key_callback);
789 rtnl_unlock();
790
791 if (err)
792 goto out;
793
794 if (cookie.error)
795 goto nla_put_failure;
796
797 genlmsg_end(msg, hdr);
798 err = genlmsg_unicast(msg, info->snd_pid);
799 goto out;
800
801 nla_put_failure:
802 err = -ENOBUFS;
803 nlmsg_free(msg);
804 out:
805 cfg80211_put_dev(drv);
806 dev_put(dev);
807 return err;
808 }
809
810 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
811 {
812 struct cfg80211_registered_device *drv;
813 int err;
814 struct net_device *dev;
815 u8 key_idx;
816 int (*func)(struct wiphy *wiphy, struct net_device *netdev,
817 u8 key_index);
818
819 if (!info->attrs[NL80211_ATTR_KEY_IDX])
820 return -EINVAL;
821
822 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
823
824 if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) {
825 if (key_idx < 4 || key_idx > 5)
826 return -EINVAL;
827 } else if (key_idx > 3)
828 return -EINVAL;
829
830 /* currently only support setting default key */
831 if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] &&
832 !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT])
833 return -EINVAL;
834
835 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
836 if (err)
837 return err;
838
839 if (info->attrs[NL80211_ATTR_KEY_DEFAULT])
840 func = drv->ops->set_default_key;
841 else
842 func = drv->ops->set_default_mgmt_key;
843
844 if (!func) {
845 err = -EOPNOTSUPP;
846 goto out;
847 }
848
849 rtnl_lock();
850 err = func(&drv->wiphy, dev, key_idx);
851 rtnl_unlock();
852
853 out:
854 cfg80211_put_dev(drv);
855 dev_put(dev);
856 return err;
857 }
858
859 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
860 {
861 struct cfg80211_registered_device *drv;
862 int err;
863 struct net_device *dev;
864 struct key_params params;
865 u8 key_idx = 0;
866 u8 *mac_addr = NULL;
867
868 memset(&params, 0, sizeof(params));
869
870 if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
871 return -EINVAL;
872
873 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
874 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
875 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
876 }
877
878 if (info->attrs[NL80211_ATTR_KEY_IDX])
879 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
880
881 params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
882
883 if (info->attrs[NL80211_ATTR_MAC])
884 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
885
886 if (key_idx > 5)
887 return -EINVAL;
888
889 /*
890 * Disallow pairwise keys with non-zero index unless it's WEP
891 * (because current deployments use pairwise WEP keys with
892 * non-zero indizes but 802.11i clearly specifies to use zero)
893 */
894 if (mac_addr && key_idx &&
895 params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
896 params.cipher != WLAN_CIPHER_SUITE_WEP104)
897 return -EINVAL;
898
899 /* TODO: add definitions for the lengths to linux/ieee80211.h */
900 switch (params.cipher) {
901 case WLAN_CIPHER_SUITE_WEP40:
902 if (params.key_len != 5)
903 return -EINVAL;
904 break;
905 case WLAN_CIPHER_SUITE_TKIP:
906 if (params.key_len != 32)
907 return -EINVAL;
908 break;
909 case WLAN_CIPHER_SUITE_CCMP:
910 if (params.key_len != 16)
911 return -EINVAL;
912 break;
913 case WLAN_CIPHER_SUITE_WEP104:
914 if (params.key_len != 13)
915 return -EINVAL;
916 break;
917 case WLAN_CIPHER_SUITE_AES_CMAC:
918 if (params.key_len != 16)
919 return -EINVAL;
920 break;
921 default:
922 return -EINVAL;
923 }
924
925 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
926 if (err)
927 return err;
928
929 if (!drv->ops->add_key) {
930 err = -EOPNOTSUPP;
931 goto out;
932 }
933
934 rtnl_lock();
935 err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
936 rtnl_unlock();
937
938 out:
939 cfg80211_put_dev(drv);
940 dev_put(dev);
941 return err;
942 }
943
944 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
945 {
946 struct cfg80211_registered_device *drv;
947 int err;
948 struct net_device *dev;
949 u8 key_idx = 0;
950 u8 *mac_addr = NULL;
951
952 if (info->attrs[NL80211_ATTR_KEY_IDX])
953 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
954
955 if (key_idx > 5)
956 return -EINVAL;
957
958 if (info->attrs[NL80211_ATTR_MAC])
959 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
960
961 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
962 if (err)
963 return err;
964
965 if (!drv->ops->del_key) {
966 err = -EOPNOTSUPP;
967 goto out;
968 }
969
970 rtnl_lock();
971 err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
972 rtnl_unlock();
973
974 out:
975 cfg80211_put_dev(drv);
976 dev_put(dev);
977 return err;
978 }
979
980 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
981 {
982 int (*call)(struct wiphy *wiphy, struct net_device *dev,
983 struct beacon_parameters *info);
984 struct cfg80211_registered_device *drv;
985 int err;
986 struct net_device *dev;
987 struct beacon_parameters params;
988 int haveinfo = 0;
989
990 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
991 if (err)
992 return err;
993
994 switch (info->genlhdr->cmd) {
995 case NL80211_CMD_NEW_BEACON:
996 /* these are required for NEW_BEACON */
997 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
998 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
999 !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1000 err = -EINVAL;
1001 goto out;
1002 }
1003
1004 call = drv->ops->add_beacon;
1005 break;
1006 case NL80211_CMD_SET_BEACON:
1007 call = drv->ops->set_beacon;
1008 break;
1009 default:
1010 WARN_ON(1);
1011 err = -EOPNOTSUPP;
1012 goto out;
1013 }
1014
1015 if (!call) {
1016 err = -EOPNOTSUPP;
1017 goto out;
1018 }
1019
1020 memset(&params, 0, sizeof(params));
1021
1022 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1023 params.interval =
1024 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1025 haveinfo = 1;
1026 }
1027
1028 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1029 params.dtim_period =
1030 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1031 haveinfo = 1;
1032 }
1033
1034 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1035 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1036 params.head_len =
1037 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1038 haveinfo = 1;
1039 }
1040
1041 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1042 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1043 params.tail_len =
1044 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1045 haveinfo = 1;
1046 }
1047
1048 if (!haveinfo) {
1049 err = -EINVAL;
1050 goto out;
1051 }
1052
1053 rtnl_lock();
1054 err = call(&drv->wiphy, dev, &params);
1055 rtnl_unlock();
1056
1057 out:
1058 cfg80211_put_dev(drv);
1059 dev_put(dev);
1060 return err;
1061 }
1062
1063 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1064 {
1065 struct cfg80211_registered_device *drv;
1066 int err;
1067 struct net_device *dev;
1068
1069 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1070 if (err)
1071 return err;
1072
1073 if (!drv->ops->del_beacon) {
1074 err = -EOPNOTSUPP;
1075 goto out;
1076 }
1077
1078 rtnl_lock();
1079 err = drv->ops->del_beacon(&drv->wiphy, dev);
1080 rtnl_unlock();
1081
1082 out:
1083 cfg80211_put_dev(drv);
1084 dev_put(dev);
1085 return err;
1086 }
1087
1088 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1089 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1090 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1091 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1092 };
1093
1094 static int parse_station_flags(struct nlattr *nla, u32 *staflags)
1095 {
1096 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1097 int flag;
1098
1099 *staflags = 0;
1100
1101 if (!nla)
1102 return 0;
1103
1104 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1105 nla, sta_flags_policy))
1106 return -EINVAL;
1107
1108 *staflags = STATION_FLAG_CHANGED;
1109
1110 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1111 if (flags[flag])
1112 *staflags |= (1<<flag);
1113
1114 return 0;
1115 }
1116
1117 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1118 {
1119 int modulation, streams, bitrate;
1120
1121 if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1122 return rate->legacy;
1123
1124 /* the formula below does only work for MCS values smaller than 32 */
1125 if (rate->mcs >= 32)
1126 return 0;
1127
1128 modulation = rate->mcs & 7;
1129 streams = (rate->mcs >> 3) + 1;
1130
1131 bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1132 13500000 : 6500000;
1133
1134 if (modulation < 4)
1135 bitrate *= (modulation + 1);
1136 else if (modulation == 4)
1137 bitrate *= (modulation + 2);
1138 else
1139 bitrate *= (modulation + 3);
1140
1141 bitrate *= streams;
1142
1143 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1144 bitrate = (bitrate / 9) * 10;
1145
1146 /* do NOT round down here */
1147 return (bitrate + 50000) / 100000;
1148 }
1149
1150 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1151 int flags, struct net_device *dev,
1152 u8 *mac_addr, struct station_info *sinfo)
1153 {
1154 void *hdr;
1155 struct nlattr *sinfoattr, *txrate;
1156 u16 bitrate;
1157
1158 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1159 if (!hdr)
1160 return -1;
1161
1162 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1163 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1164
1165 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1166 if (!sinfoattr)
1167 goto nla_put_failure;
1168 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1169 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1170 sinfo->inactive_time);
1171 if (sinfo->filled & STATION_INFO_RX_BYTES)
1172 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1173 sinfo->rx_bytes);
1174 if (sinfo->filled & STATION_INFO_TX_BYTES)
1175 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1176 sinfo->tx_bytes);
1177 if (sinfo->filled & STATION_INFO_LLID)
1178 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1179 sinfo->llid);
1180 if (sinfo->filled & STATION_INFO_PLID)
1181 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1182 sinfo->plid);
1183 if (sinfo->filled & STATION_INFO_PLINK_STATE)
1184 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1185 sinfo->plink_state);
1186 if (sinfo->filled & STATION_INFO_SIGNAL)
1187 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1188 sinfo->signal);
1189 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1190 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1191 if (!txrate)
1192 goto nla_put_failure;
1193
1194 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1195 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1196 if (bitrate > 0)
1197 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1198
1199 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1200 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1201 sinfo->txrate.mcs);
1202 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1203 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1204 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1205 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1206
1207 nla_nest_end(msg, txrate);
1208 }
1209 if (sinfo->filled & STATION_INFO_RX_PACKETS)
1210 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1211 sinfo->rx_packets);
1212 if (sinfo->filled & STATION_INFO_TX_PACKETS)
1213 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1214 sinfo->tx_packets);
1215 nla_nest_end(msg, sinfoattr);
1216
1217 return genlmsg_end(msg, hdr);
1218
1219 nla_put_failure:
1220 genlmsg_cancel(msg, hdr);
1221 return -EMSGSIZE;
1222 }
1223
1224 static int nl80211_dump_station(struct sk_buff *skb,
1225 struct netlink_callback *cb)
1226 {
1227 struct station_info sinfo;
1228 struct cfg80211_registered_device *dev;
1229 struct net_device *netdev;
1230 u8 mac_addr[ETH_ALEN];
1231 int ifidx = cb->args[0];
1232 int sta_idx = cb->args[1];
1233 int err;
1234
1235 if (!ifidx) {
1236 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1237 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1238 nl80211_policy);
1239 if (err)
1240 return err;
1241
1242 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1243 return -EINVAL;
1244
1245 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1246 if (!ifidx)
1247 return -EINVAL;
1248 }
1249
1250 netdev = dev_get_by_index(&init_net, ifidx);
1251 if (!netdev)
1252 return -ENODEV;
1253
1254 dev = cfg80211_get_dev_from_ifindex(ifidx);
1255 if (IS_ERR(dev)) {
1256 err = PTR_ERR(dev);
1257 goto out_put_netdev;
1258 }
1259
1260 if (!dev->ops->dump_station) {
1261 err = -ENOSYS;
1262 goto out_err;
1263 }
1264
1265 rtnl_lock();
1266
1267 while (1) {
1268 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1269 mac_addr, &sinfo);
1270 if (err == -ENOENT)
1271 break;
1272 if (err)
1273 goto out_err_rtnl;
1274
1275 if (nl80211_send_station(skb,
1276 NETLINK_CB(cb->skb).pid,
1277 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1278 netdev, mac_addr,
1279 &sinfo) < 0)
1280 goto out;
1281
1282 sta_idx++;
1283 }
1284
1285
1286 out:
1287 cb->args[1] = sta_idx;
1288 err = skb->len;
1289 out_err_rtnl:
1290 rtnl_unlock();
1291 out_err:
1292 cfg80211_put_dev(dev);
1293 out_put_netdev:
1294 dev_put(netdev);
1295
1296 return err;
1297 }
1298
1299 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1300 {
1301 struct cfg80211_registered_device *drv;
1302 int err;
1303 struct net_device *dev;
1304 struct station_info sinfo;
1305 struct sk_buff *msg;
1306 u8 *mac_addr = NULL;
1307
1308 memset(&sinfo, 0, sizeof(sinfo));
1309
1310 if (!info->attrs[NL80211_ATTR_MAC])
1311 return -EINVAL;
1312
1313 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1314
1315 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1316 if (err)
1317 return err;
1318
1319 if (!drv->ops->get_station) {
1320 err = -EOPNOTSUPP;
1321 goto out;
1322 }
1323
1324 rtnl_lock();
1325 err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1326 rtnl_unlock();
1327
1328 if (err)
1329 goto out;
1330
1331 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1332 if (!msg)
1333 goto out;
1334
1335 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1336 dev, mac_addr, &sinfo) < 0)
1337 goto out_free;
1338
1339 err = genlmsg_unicast(msg, info->snd_pid);
1340 goto out;
1341
1342 out_free:
1343 nlmsg_free(msg);
1344
1345 out:
1346 cfg80211_put_dev(drv);
1347 dev_put(dev);
1348 return err;
1349 }
1350
1351 /*
1352 * Get vlan interface making sure it is on the right wiphy.
1353 */
1354 static int get_vlan(struct nlattr *vlanattr,
1355 struct cfg80211_registered_device *rdev,
1356 struct net_device **vlan)
1357 {
1358 *vlan = NULL;
1359
1360 if (vlanattr) {
1361 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1362 if (!*vlan)
1363 return -ENODEV;
1364 if (!(*vlan)->ieee80211_ptr)
1365 return -EINVAL;
1366 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1367 return -EINVAL;
1368 }
1369 return 0;
1370 }
1371
1372 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1373 {
1374 struct cfg80211_registered_device *drv;
1375 int err;
1376 struct net_device *dev;
1377 struct station_parameters params;
1378 u8 *mac_addr = NULL;
1379
1380 memset(&params, 0, sizeof(params));
1381
1382 params.listen_interval = -1;
1383
1384 if (info->attrs[NL80211_ATTR_STA_AID])
1385 return -EINVAL;
1386
1387 if (!info->attrs[NL80211_ATTR_MAC])
1388 return -EINVAL;
1389
1390 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1391
1392 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1393 params.supported_rates =
1394 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1395 params.supported_rates_len =
1396 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1397 }
1398
1399 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1400 params.listen_interval =
1401 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1402
1403 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1404 params.ht_capa =
1405 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1406
1407 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1408 &params.station_flags))
1409 return -EINVAL;
1410
1411 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1412 params.plink_action =
1413 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1414
1415 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1416 if (err)
1417 return err;
1418
1419 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1420 if (err)
1421 goto out;
1422
1423 if (!drv->ops->change_station) {
1424 err = -EOPNOTSUPP;
1425 goto out;
1426 }
1427
1428 rtnl_lock();
1429 err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1430 rtnl_unlock();
1431
1432 out:
1433 if (params.vlan)
1434 dev_put(params.vlan);
1435 cfg80211_put_dev(drv);
1436 dev_put(dev);
1437 return err;
1438 }
1439
1440 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1441 {
1442 struct cfg80211_registered_device *drv;
1443 int err;
1444 struct net_device *dev;
1445 struct station_parameters params;
1446 u8 *mac_addr = NULL;
1447
1448 memset(&params, 0, sizeof(params));
1449
1450 if (!info->attrs[NL80211_ATTR_MAC])
1451 return -EINVAL;
1452
1453 if (!info->attrs[NL80211_ATTR_STA_AID])
1454 return -EINVAL;
1455
1456 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1457 return -EINVAL;
1458
1459 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1460 return -EINVAL;
1461
1462 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1463 params.supported_rates =
1464 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1465 params.supported_rates_len =
1466 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1467 params.listen_interval =
1468 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1469 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1470 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1471 params.ht_capa =
1472 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1473
1474 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1475 &params.station_flags))
1476 return -EINVAL;
1477
1478 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1479 if (err)
1480 return err;
1481
1482 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1483 if (err)
1484 goto out;
1485
1486 if (!drv->ops->add_station) {
1487 err = -EOPNOTSUPP;
1488 goto out;
1489 }
1490
1491 rtnl_lock();
1492 err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1493 rtnl_unlock();
1494
1495 out:
1496 if (params.vlan)
1497 dev_put(params.vlan);
1498 cfg80211_put_dev(drv);
1499 dev_put(dev);
1500 return err;
1501 }
1502
1503 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1504 {
1505 struct cfg80211_registered_device *drv;
1506 int err;
1507 struct net_device *dev;
1508 u8 *mac_addr = NULL;
1509
1510 if (info->attrs[NL80211_ATTR_MAC])
1511 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1512
1513 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1514 if (err)
1515 return err;
1516
1517 if (!drv->ops->del_station) {
1518 err = -EOPNOTSUPP;
1519 goto out;
1520 }
1521
1522 rtnl_lock();
1523 err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1524 rtnl_unlock();
1525
1526 out:
1527 cfg80211_put_dev(drv);
1528 dev_put(dev);
1529 return err;
1530 }
1531
1532 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1533 int flags, struct net_device *dev,
1534 u8 *dst, u8 *next_hop,
1535 struct mpath_info *pinfo)
1536 {
1537 void *hdr;
1538 struct nlattr *pinfoattr;
1539
1540 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1541 if (!hdr)
1542 return -1;
1543
1544 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1545 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1546 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1547
1548 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1549 if (!pinfoattr)
1550 goto nla_put_failure;
1551 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1552 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1553 pinfo->frame_qlen);
1554 if (pinfo->filled & MPATH_INFO_DSN)
1555 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1556 pinfo->dsn);
1557 if (pinfo->filled & MPATH_INFO_METRIC)
1558 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1559 pinfo->metric);
1560 if (pinfo->filled & MPATH_INFO_EXPTIME)
1561 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1562 pinfo->exptime);
1563 if (pinfo->filled & MPATH_INFO_FLAGS)
1564 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1565 pinfo->flags);
1566 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1567 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1568 pinfo->discovery_timeout);
1569 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1570 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1571 pinfo->discovery_retries);
1572
1573 nla_nest_end(msg, pinfoattr);
1574
1575 return genlmsg_end(msg, hdr);
1576
1577 nla_put_failure:
1578 genlmsg_cancel(msg, hdr);
1579 return -EMSGSIZE;
1580 }
1581
1582 static int nl80211_dump_mpath(struct sk_buff *skb,
1583 struct netlink_callback *cb)
1584 {
1585 struct mpath_info pinfo;
1586 struct cfg80211_registered_device *dev;
1587 struct net_device *netdev;
1588 u8 dst[ETH_ALEN];
1589 u8 next_hop[ETH_ALEN];
1590 int ifidx = cb->args[0];
1591 int path_idx = cb->args[1];
1592 int err;
1593
1594 if (!ifidx) {
1595 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1596 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1597 nl80211_policy);
1598 if (err)
1599 return err;
1600
1601 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1602 return -EINVAL;
1603
1604 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1605 if (!ifidx)
1606 return -EINVAL;
1607 }
1608
1609 netdev = dev_get_by_index(&init_net, ifidx);
1610 if (!netdev)
1611 return -ENODEV;
1612
1613 dev = cfg80211_get_dev_from_ifindex(ifidx);
1614 if (IS_ERR(dev)) {
1615 err = PTR_ERR(dev);
1616 goto out_put_netdev;
1617 }
1618
1619 if (!dev->ops->dump_mpath) {
1620 err = -ENOSYS;
1621 goto out_err;
1622 }
1623
1624 rtnl_lock();
1625
1626 while (1) {
1627 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1628 dst, next_hop, &pinfo);
1629 if (err == -ENOENT)
1630 break;
1631 if (err)
1632 goto out_err_rtnl;
1633
1634 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1635 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1636 netdev, dst, next_hop,
1637 &pinfo) < 0)
1638 goto out;
1639
1640 path_idx++;
1641 }
1642
1643
1644 out:
1645 cb->args[1] = path_idx;
1646 err = skb->len;
1647 out_err_rtnl:
1648 rtnl_unlock();
1649 out_err:
1650 cfg80211_put_dev(dev);
1651 out_put_netdev:
1652 dev_put(netdev);
1653
1654 return err;
1655 }
1656
1657 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1658 {
1659 struct cfg80211_registered_device *drv;
1660 int err;
1661 struct net_device *dev;
1662 struct mpath_info pinfo;
1663 struct sk_buff *msg;
1664 u8 *dst = NULL;
1665 u8 next_hop[ETH_ALEN];
1666
1667 memset(&pinfo, 0, sizeof(pinfo));
1668
1669 if (!info->attrs[NL80211_ATTR_MAC])
1670 return -EINVAL;
1671
1672 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1673
1674 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1675 if (err)
1676 return err;
1677
1678 if (!drv->ops->get_mpath) {
1679 err = -EOPNOTSUPP;
1680 goto out;
1681 }
1682
1683 rtnl_lock();
1684 err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1685 rtnl_unlock();
1686
1687 if (err)
1688 goto out;
1689
1690 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1691 if (!msg)
1692 goto out;
1693
1694 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1695 dev, dst, next_hop, &pinfo) < 0)
1696 goto out_free;
1697
1698 err = genlmsg_unicast(msg, info->snd_pid);
1699 goto out;
1700
1701 out_free:
1702 nlmsg_free(msg);
1703
1704 out:
1705 cfg80211_put_dev(drv);
1706 dev_put(dev);
1707 return err;
1708 }
1709
1710 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
1711 {
1712 struct cfg80211_registered_device *drv;
1713 int err;
1714 struct net_device *dev;
1715 u8 *dst = NULL;
1716 u8 *next_hop = NULL;
1717
1718 if (!info->attrs[NL80211_ATTR_MAC])
1719 return -EINVAL;
1720
1721 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1722 return -EINVAL;
1723
1724 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1725 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1726
1727 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1728 if (err)
1729 return err;
1730
1731 if (!drv->ops->change_mpath) {
1732 err = -EOPNOTSUPP;
1733 goto out;
1734 }
1735
1736 rtnl_lock();
1737 err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
1738 rtnl_unlock();
1739
1740 out:
1741 cfg80211_put_dev(drv);
1742 dev_put(dev);
1743 return err;
1744 }
1745 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
1746 {
1747 struct cfg80211_registered_device *drv;
1748 int err;
1749 struct net_device *dev;
1750 u8 *dst = NULL;
1751 u8 *next_hop = NULL;
1752
1753 if (!info->attrs[NL80211_ATTR_MAC])
1754 return -EINVAL;
1755
1756 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1757 return -EINVAL;
1758
1759 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1760 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1761
1762 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1763 if (err)
1764 return err;
1765
1766 if (!drv->ops->add_mpath) {
1767 err = -EOPNOTSUPP;
1768 goto out;
1769 }
1770
1771 rtnl_lock();
1772 err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
1773 rtnl_unlock();
1774
1775 out:
1776 cfg80211_put_dev(drv);
1777 dev_put(dev);
1778 return err;
1779 }
1780
1781 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
1782 {
1783 struct cfg80211_registered_device *drv;
1784 int err;
1785 struct net_device *dev;
1786 u8 *dst = NULL;
1787
1788 if (info->attrs[NL80211_ATTR_MAC])
1789 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1790
1791 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1792 if (err)
1793 return err;
1794
1795 if (!drv->ops->del_mpath) {
1796 err = -EOPNOTSUPP;
1797 goto out;
1798 }
1799
1800 rtnl_lock();
1801 err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
1802 rtnl_unlock();
1803
1804 out:
1805 cfg80211_put_dev(drv);
1806 dev_put(dev);
1807 return err;
1808 }
1809
1810 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
1811 {
1812 struct cfg80211_registered_device *drv;
1813 int err;
1814 struct net_device *dev;
1815 struct bss_parameters params;
1816
1817 memset(&params, 0, sizeof(params));
1818 /* default to not changing parameters */
1819 params.use_cts_prot = -1;
1820 params.use_short_preamble = -1;
1821 params.use_short_slot_time = -1;
1822
1823 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
1824 params.use_cts_prot =
1825 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
1826 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
1827 params.use_short_preamble =
1828 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
1829 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
1830 params.use_short_slot_time =
1831 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
1832 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
1833 params.basic_rates =
1834 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
1835 params.basic_rates_len =
1836 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
1837 }
1838
1839 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1840 if (err)
1841 return err;
1842
1843 if (!drv->ops->change_bss) {
1844 err = -EOPNOTSUPP;
1845 goto out;
1846 }
1847
1848 rtnl_lock();
1849 err = drv->ops->change_bss(&drv->wiphy, dev, &params);
1850 rtnl_unlock();
1851
1852 out:
1853 cfg80211_put_dev(drv);
1854 dev_put(dev);
1855 return err;
1856 }
1857
1858 static const struct nla_policy
1859 reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
1860 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
1861 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
1862 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
1863 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
1864 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
1865 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
1866 };
1867
1868 static int parse_reg_rule(struct nlattr *tb[],
1869 struct ieee80211_reg_rule *reg_rule)
1870 {
1871 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
1872 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
1873
1874 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
1875 return -EINVAL;
1876 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
1877 return -EINVAL;
1878 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
1879 return -EINVAL;
1880 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
1881 return -EINVAL;
1882 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
1883 return -EINVAL;
1884
1885 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
1886
1887 freq_range->start_freq_khz =
1888 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
1889 freq_range->end_freq_khz =
1890 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
1891 freq_range->max_bandwidth_khz =
1892 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
1893
1894 power_rule->max_eirp =
1895 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
1896
1897 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
1898 power_rule->max_antenna_gain =
1899 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
1900
1901 return 0;
1902 }
1903
1904 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
1905 {
1906 int r;
1907 char *data = NULL;
1908
1909 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
1910 return -EINVAL;
1911
1912 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
1913
1914 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
1915 /* We ignore world regdom requests with the old regdom setup */
1916 if (is_world_regdom(data))
1917 return -EINVAL;
1918 #endif
1919 mutex_lock(&cfg80211_drv_mutex);
1920 r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, 0, ENVIRON_ANY);
1921 mutex_unlock(&cfg80211_drv_mutex);
1922 /* This means the regulatory domain was already set, however
1923 * we don't want to confuse userspace with a "successful error"
1924 * message so lets just treat it as a success */
1925 if (r == -EALREADY)
1926 r = 0;
1927 return r;
1928 }
1929
1930 static int nl80211_get_mesh_params(struct sk_buff *skb,
1931 struct genl_info *info)
1932 {
1933 struct cfg80211_registered_device *drv;
1934 struct mesh_config cur_params;
1935 int err;
1936 struct net_device *dev;
1937 void *hdr;
1938 struct nlattr *pinfoattr;
1939 struct sk_buff *msg;
1940
1941 /* Look up our device */
1942 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1943 if (err)
1944 return err;
1945
1946 /* Get the mesh params */
1947 rtnl_lock();
1948 err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params);
1949 rtnl_unlock();
1950 if (err)
1951 goto out;
1952
1953 /* Draw up a netlink message to send back */
1954 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1955 if (!msg) {
1956 err = -ENOBUFS;
1957 goto out;
1958 }
1959 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1960 NL80211_CMD_GET_MESH_PARAMS);
1961 if (!hdr)
1962 goto nla_put_failure;
1963 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
1964 if (!pinfoattr)
1965 goto nla_put_failure;
1966 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1967 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
1968 cur_params.dot11MeshRetryTimeout);
1969 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
1970 cur_params.dot11MeshConfirmTimeout);
1971 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
1972 cur_params.dot11MeshHoldingTimeout);
1973 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
1974 cur_params.dot11MeshMaxPeerLinks);
1975 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
1976 cur_params.dot11MeshMaxRetries);
1977 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
1978 cur_params.dot11MeshTTL);
1979 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
1980 cur_params.auto_open_plinks);
1981 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
1982 cur_params.dot11MeshHWMPmaxPREQretries);
1983 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
1984 cur_params.path_refresh_time);
1985 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
1986 cur_params.min_discovery_timeout);
1987 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
1988 cur_params.dot11MeshHWMPactivePathTimeout);
1989 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
1990 cur_params.dot11MeshHWMPpreqMinInterval);
1991 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1992 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
1993 nla_nest_end(msg, pinfoattr);
1994 genlmsg_end(msg, hdr);
1995 err = genlmsg_unicast(msg, info->snd_pid);
1996 goto out;
1997
1998 nla_put_failure:
1999 genlmsg_cancel(msg, hdr);
2000 err = -EMSGSIZE;
2001 out:
2002 /* Cleanup */
2003 cfg80211_put_dev(drv);
2004 dev_put(dev);
2005 return err;
2006 }
2007
2008 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2009 do {\
2010 if (table[attr_num]) {\
2011 cfg.param = nla_fn(table[attr_num]); \
2012 mask |= (1 << (attr_num - 1)); \
2013 } \
2014 } while (0);\
2015
2016 static struct nla_policy
2017 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2018 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2019 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2020 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2021 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2022 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2023 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2024 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2025
2026 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2027 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2028 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2029 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2030 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2031 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2032 };
2033
2034 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2035 {
2036 int err;
2037 u32 mask;
2038 struct cfg80211_registered_device *drv;
2039 struct net_device *dev;
2040 struct mesh_config cfg;
2041 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2042 struct nlattr *parent_attr;
2043
2044 parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2045 if (!parent_attr)
2046 return -EINVAL;
2047 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2048 parent_attr, nl80211_meshconf_params_policy))
2049 return -EINVAL;
2050
2051 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2052 if (err)
2053 return err;
2054
2055 /* This makes sure that there aren't more than 32 mesh config
2056 * parameters (otherwise our bitfield scheme would not work.) */
2057 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2058
2059 /* Fill in the params struct */
2060 mask = 0;
2061 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2062 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2063 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2064 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2065 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2066 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2067 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2068 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2069 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2070 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2071 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2072 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2073 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2074 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2075 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2076 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2077 nla_get_u8);
2078 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2079 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2080 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2081 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2082 nla_get_u16);
2083 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2084 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2085 nla_get_u32);
2086 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2087 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2088 nla_get_u16);
2089 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2090 dot11MeshHWMPnetDiameterTraversalTime,
2091 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2092 nla_get_u16);
2093
2094 /* Apply changes */
2095 rtnl_lock();
2096 err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask);
2097 rtnl_unlock();
2098
2099 /* cleanup */
2100 cfg80211_put_dev(drv);
2101 dev_put(dev);
2102 return err;
2103 }
2104
2105 #undef FILL_IN_MESH_PARAM_IF_SET
2106
2107 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2108 {
2109 struct sk_buff *msg;
2110 void *hdr = NULL;
2111 struct nlattr *nl_reg_rules;
2112 unsigned int i;
2113 int err = -EINVAL;
2114
2115 mutex_lock(&cfg80211_drv_mutex);
2116
2117 if (!cfg80211_regdomain)
2118 goto out;
2119
2120 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2121 if (!msg) {
2122 err = -ENOBUFS;
2123 goto out;
2124 }
2125
2126 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2127 NL80211_CMD_GET_REG);
2128 if (!hdr)
2129 goto nla_put_failure;
2130
2131 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2132 cfg80211_regdomain->alpha2);
2133
2134 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2135 if (!nl_reg_rules)
2136 goto nla_put_failure;
2137
2138 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2139 struct nlattr *nl_reg_rule;
2140 const struct ieee80211_reg_rule *reg_rule;
2141 const struct ieee80211_freq_range *freq_range;
2142 const struct ieee80211_power_rule *power_rule;
2143
2144 reg_rule = &cfg80211_regdomain->reg_rules[i];
2145 freq_range = &reg_rule->freq_range;
2146 power_rule = &reg_rule->power_rule;
2147
2148 nl_reg_rule = nla_nest_start(msg, i);
2149 if (!nl_reg_rule)
2150 goto nla_put_failure;
2151
2152 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2153 reg_rule->flags);
2154 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2155 freq_range->start_freq_khz);
2156 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2157 freq_range->end_freq_khz);
2158 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2159 freq_range->max_bandwidth_khz);
2160 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2161 power_rule->max_antenna_gain);
2162 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2163 power_rule->max_eirp);
2164
2165 nla_nest_end(msg, nl_reg_rule);
2166 }
2167
2168 nla_nest_end(msg, nl_reg_rules);
2169
2170 genlmsg_end(msg, hdr);
2171 err = genlmsg_unicast(msg, info->snd_pid);
2172 goto out;
2173
2174 nla_put_failure:
2175 genlmsg_cancel(msg, hdr);
2176 err = -EMSGSIZE;
2177 out:
2178 mutex_unlock(&cfg80211_drv_mutex);
2179 return err;
2180 }
2181
2182 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2183 {
2184 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2185 struct nlattr *nl_reg_rule;
2186 char *alpha2 = NULL;
2187 int rem_reg_rules = 0, r = 0;
2188 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2189 struct ieee80211_regdomain *rd = NULL;
2190
2191 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2192 return -EINVAL;
2193
2194 if (!info->attrs[NL80211_ATTR_REG_RULES])
2195 return -EINVAL;
2196
2197 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2198
2199 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2200 rem_reg_rules) {
2201 num_rules++;
2202 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2203 goto bad_reg;
2204 }
2205
2206 if (!reg_is_valid_request(alpha2))
2207 return -EINVAL;
2208
2209 size_of_regd = sizeof(struct ieee80211_regdomain) +
2210 (num_rules * sizeof(struct ieee80211_reg_rule));
2211
2212 rd = kzalloc(size_of_regd, GFP_KERNEL);
2213 if (!rd)
2214 return -ENOMEM;
2215
2216 rd->n_reg_rules = num_rules;
2217 rd->alpha2[0] = alpha2[0];
2218 rd->alpha2[1] = alpha2[1];
2219
2220 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2221 rem_reg_rules) {
2222 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2223 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2224 reg_rule_policy);
2225 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2226 if (r)
2227 goto bad_reg;
2228
2229 rule_idx++;
2230
2231 if (rule_idx > NL80211_MAX_SUPP_REG_RULES)
2232 goto bad_reg;
2233 }
2234
2235 BUG_ON(rule_idx != num_rules);
2236
2237 mutex_lock(&cfg80211_drv_mutex);
2238 r = set_regdom(rd);
2239 mutex_unlock(&cfg80211_drv_mutex);
2240 return r;
2241
2242 bad_reg:
2243 kfree(rd);
2244 return -EINVAL;
2245 }
2246
2247 static int nl80211_set_mgmt_extra_ie(struct sk_buff *skb,
2248 struct genl_info *info)
2249 {
2250 struct cfg80211_registered_device *drv;
2251 int err;
2252 struct net_device *dev;
2253 struct mgmt_extra_ie_params params;
2254
2255 memset(&params, 0, sizeof(params));
2256
2257 if (!info->attrs[NL80211_ATTR_MGMT_SUBTYPE])
2258 return -EINVAL;
2259 params.subtype = nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
2260 if (params.subtype > 15)
2261 return -EINVAL; /* FC Subtype field is 4 bits (0..15) */
2262
2263 if (info->attrs[NL80211_ATTR_IE]) {
2264 params.ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2265 params.ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2266 }
2267
2268 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2269 if (err)
2270 return err;
2271
2272 if (drv->ops->set_mgmt_extra_ie) {
2273 rtnl_lock();
2274 err = drv->ops->set_mgmt_extra_ie(&drv->wiphy, dev, &params);
2275 rtnl_unlock();
2276 } else
2277 err = -EOPNOTSUPP;
2278
2279 cfg80211_put_dev(drv);
2280 dev_put(dev);
2281 return err;
2282 }
2283
2284 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2285 {
2286 struct cfg80211_registered_device *drv;
2287 struct net_device *dev;
2288 struct cfg80211_scan_request *request;
2289 struct cfg80211_ssid *ssid;
2290 struct ieee80211_channel *channel;
2291 struct nlattr *attr;
2292 struct wiphy *wiphy;
2293 int err, tmp, n_ssids = 0, n_channels = 0, i;
2294 enum ieee80211_band band;
2295 size_t ie_len;
2296
2297 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2298 if (err)
2299 return err;
2300
2301 wiphy = &drv->wiphy;
2302
2303 if (!drv->ops->scan) {
2304 err = -EOPNOTSUPP;
2305 goto out;
2306 }
2307
2308 rtnl_lock();
2309
2310 if (drv->scan_req) {
2311 err = -EBUSY;
2312 goto out_unlock;
2313 }
2314
2315 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2316 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp)
2317 n_channels++;
2318 if (!n_channels) {
2319 err = -EINVAL;
2320 goto out_unlock;
2321 }
2322 } else {
2323 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2324 if (wiphy->bands[band])
2325 n_channels += wiphy->bands[band]->n_channels;
2326 }
2327
2328 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2329 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2330 n_ssids++;
2331
2332 if (n_ssids > wiphy->max_scan_ssids) {
2333 err = -EINVAL;
2334 goto out_unlock;
2335 }
2336
2337 if (info->attrs[NL80211_ATTR_IE])
2338 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2339 else
2340 ie_len = 0;
2341
2342 request = kzalloc(sizeof(*request)
2343 + sizeof(*ssid) * n_ssids
2344 + sizeof(channel) * n_channels
2345 + ie_len, GFP_KERNEL);
2346 if (!request) {
2347 err = -ENOMEM;
2348 goto out_unlock;
2349 }
2350
2351 request->channels = (void *)((char *)request + sizeof(*request));
2352 request->n_channels = n_channels;
2353 if (n_ssids)
2354 request->ssids = (void *)(request->channels + n_channels);
2355 request->n_ssids = n_ssids;
2356 if (ie_len) {
2357 if (request->ssids)
2358 request->ie = (void *)(request->ssids + n_ssids);
2359 else
2360 request->ie = (void *)(request->channels + n_channels);
2361 }
2362
2363 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2364 /* user specified, bail out if channel not found */
2365 request->n_channels = n_channels;
2366 i = 0;
2367 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2368 request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2369 if (!request->channels[i]) {
2370 err = -EINVAL;
2371 goto out_free;
2372 }
2373 i++;
2374 }
2375 } else {
2376 /* all channels */
2377 i = 0;
2378 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2379 int j;
2380 if (!wiphy->bands[band])
2381 continue;
2382 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2383 request->channels[i] = &wiphy->bands[band]->channels[j];
2384 i++;
2385 }
2386 }
2387 }
2388
2389 i = 0;
2390 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2391 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2392 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2393 err = -EINVAL;
2394 goto out_free;
2395 }
2396 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2397 request->ssids[i].ssid_len = nla_len(attr);
2398 i++;
2399 }
2400 }
2401
2402 if (info->attrs[NL80211_ATTR_IE]) {
2403 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2404 memcpy(request->ie, nla_data(info->attrs[NL80211_ATTR_IE]),
2405 request->ie_len);
2406 }
2407
2408 request->ifidx = dev->ifindex;
2409 request->wiphy = &drv->wiphy;
2410
2411 drv->scan_req = request;
2412 err = drv->ops->scan(&drv->wiphy, dev, request);
2413
2414 out_free:
2415 if (err) {
2416 drv->scan_req = NULL;
2417 kfree(request);
2418 }
2419 out_unlock:
2420 rtnl_unlock();
2421 out:
2422 cfg80211_put_dev(drv);
2423 dev_put(dev);
2424 return err;
2425 }
2426
2427 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
2428 struct cfg80211_registered_device *rdev,
2429 struct net_device *dev,
2430 struct cfg80211_bss *res)
2431 {
2432 void *hdr;
2433 struct nlattr *bss;
2434
2435 hdr = nl80211hdr_put(msg, pid, seq, flags,
2436 NL80211_CMD_NEW_SCAN_RESULTS);
2437 if (!hdr)
2438 return -1;
2439
2440 NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
2441 rdev->bss_generation);
2442 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2443
2444 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
2445 if (!bss)
2446 goto nla_put_failure;
2447 if (!is_zero_ether_addr(res->bssid))
2448 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
2449 if (res->information_elements && res->len_information_elements)
2450 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
2451 res->len_information_elements,
2452 res->information_elements);
2453 if (res->tsf)
2454 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
2455 if (res->beacon_interval)
2456 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
2457 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
2458 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
2459
2460 switch (res->signal_type) {
2461 case CFG80211_SIGNAL_TYPE_MBM:
2462 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
2463 break;
2464 case CFG80211_SIGNAL_TYPE_UNSPEC:
2465 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
2466 break;
2467 default:
2468 break;
2469 }
2470
2471 nla_nest_end(msg, bss);
2472
2473 return genlmsg_end(msg, hdr);
2474
2475 nla_put_failure:
2476 genlmsg_cancel(msg, hdr);
2477 return -EMSGSIZE;
2478 }
2479
2480 static int nl80211_dump_scan(struct sk_buff *skb,
2481 struct netlink_callback *cb)
2482 {
2483 struct cfg80211_registered_device *dev;
2484 struct net_device *netdev;
2485 struct cfg80211_internal_bss *scan;
2486 int ifidx = cb->args[0];
2487 int start = cb->args[1], idx = 0;
2488 int err;
2489
2490 if (!ifidx) {
2491 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2492 nl80211_fam.attrbuf, nl80211_fam.maxattr,
2493 nl80211_policy);
2494 if (err)
2495 return err;
2496
2497 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2498 return -EINVAL;
2499
2500 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2501 if (!ifidx)
2502 return -EINVAL;
2503 cb->args[0] = ifidx;
2504 }
2505
2506 netdev = dev_get_by_index(&init_net, ifidx);
2507 if (!netdev)
2508 return -ENODEV;
2509
2510 dev = cfg80211_get_dev_from_ifindex(ifidx);
2511 if (IS_ERR(dev)) {
2512 err = PTR_ERR(dev);
2513 goto out_put_netdev;
2514 }
2515
2516 spin_lock_bh(&dev->bss_lock);
2517 cfg80211_bss_expire(dev);
2518
2519 list_for_each_entry(scan, &dev->bss_list, list) {
2520 if (++idx <= start)
2521 continue;
2522 if (nl80211_send_bss(skb,
2523 NETLINK_CB(cb->skb).pid,
2524 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2525 dev, netdev, &scan->pub) < 0) {
2526 idx--;
2527 goto out;
2528 }
2529 }
2530
2531 out:
2532 spin_unlock_bh(&dev->bss_lock);
2533
2534 cb->args[1] = idx;
2535 err = skb->len;
2536 cfg80211_put_dev(dev);
2537 out_put_netdev:
2538 dev_put(netdev);
2539
2540 return err;
2541 }
2542
2543 static struct genl_ops nl80211_ops[] = {
2544 {
2545 .cmd = NL80211_CMD_GET_WIPHY,
2546 .doit = nl80211_get_wiphy,
2547 .dumpit = nl80211_dump_wiphy,
2548 .policy = nl80211_policy,
2549 /* can be retrieved by unprivileged users */
2550 },
2551 {
2552 .cmd = NL80211_CMD_SET_WIPHY,
2553 .doit = nl80211_set_wiphy,
2554 .policy = nl80211_policy,
2555 .flags = GENL_ADMIN_PERM,
2556 },
2557 {
2558 .cmd = NL80211_CMD_GET_INTERFACE,
2559 .doit = nl80211_get_interface,
2560 .dumpit = nl80211_dump_interface,
2561 .policy = nl80211_policy,
2562 /* can be retrieved by unprivileged users */
2563 },
2564 {
2565 .cmd = NL80211_CMD_SET_INTERFACE,
2566 .doit = nl80211_set_interface,
2567 .policy = nl80211_policy,
2568 .flags = GENL_ADMIN_PERM,
2569 },
2570 {
2571 .cmd = NL80211_CMD_NEW_INTERFACE,
2572 .doit = nl80211_new_interface,
2573 .policy = nl80211_policy,
2574 .flags = GENL_ADMIN_PERM,
2575 },
2576 {
2577 .cmd = NL80211_CMD_DEL_INTERFACE,
2578 .doit = nl80211_del_interface,
2579 .policy = nl80211_policy,
2580 .flags = GENL_ADMIN_PERM,
2581 },
2582 {
2583 .cmd = NL80211_CMD_GET_KEY,
2584 .doit = nl80211_get_key,
2585 .policy = nl80211_policy,
2586 .flags = GENL_ADMIN_PERM,
2587 },
2588 {
2589 .cmd = NL80211_CMD_SET_KEY,
2590 .doit = nl80211_set_key,
2591 .policy = nl80211_policy,
2592 .flags = GENL_ADMIN_PERM,
2593 },
2594 {
2595 .cmd = NL80211_CMD_NEW_KEY,
2596 .doit = nl80211_new_key,
2597 .policy = nl80211_policy,
2598 .flags = GENL_ADMIN_PERM,
2599 },
2600 {
2601 .cmd = NL80211_CMD_DEL_KEY,
2602 .doit = nl80211_del_key,
2603 .policy = nl80211_policy,
2604 .flags = GENL_ADMIN_PERM,
2605 },
2606 {
2607 .cmd = NL80211_CMD_SET_BEACON,
2608 .policy = nl80211_policy,
2609 .flags = GENL_ADMIN_PERM,
2610 .doit = nl80211_addset_beacon,
2611 },
2612 {
2613 .cmd = NL80211_CMD_NEW_BEACON,
2614 .policy = nl80211_policy,
2615 .flags = GENL_ADMIN_PERM,
2616 .doit = nl80211_addset_beacon,
2617 },
2618 {
2619 .cmd = NL80211_CMD_DEL_BEACON,
2620 .policy = nl80211_policy,
2621 .flags = GENL_ADMIN_PERM,
2622 .doit = nl80211_del_beacon,
2623 },
2624 {
2625 .cmd = NL80211_CMD_GET_STATION,
2626 .doit = nl80211_get_station,
2627 .dumpit = nl80211_dump_station,
2628 .policy = nl80211_policy,
2629 },
2630 {
2631 .cmd = NL80211_CMD_SET_STATION,
2632 .doit = nl80211_set_station,
2633 .policy = nl80211_policy,
2634 .flags = GENL_ADMIN_PERM,
2635 },
2636 {
2637 .cmd = NL80211_CMD_NEW_STATION,
2638 .doit = nl80211_new_station,
2639 .policy = nl80211_policy,
2640 .flags = GENL_ADMIN_PERM,
2641 },
2642 {
2643 .cmd = NL80211_CMD_DEL_STATION,
2644 .doit = nl80211_del_station,
2645 .policy = nl80211_policy,
2646 .flags = GENL_ADMIN_PERM,
2647 },
2648 {
2649 .cmd = NL80211_CMD_GET_MPATH,
2650 .doit = nl80211_get_mpath,
2651 .dumpit = nl80211_dump_mpath,
2652 .policy = nl80211_policy,
2653 .flags = GENL_ADMIN_PERM,
2654 },
2655 {
2656 .cmd = NL80211_CMD_SET_MPATH,
2657 .doit = nl80211_set_mpath,
2658 .policy = nl80211_policy,
2659 .flags = GENL_ADMIN_PERM,
2660 },
2661 {
2662 .cmd = NL80211_CMD_NEW_MPATH,
2663 .doit = nl80211_new_mpath,
2664 .policy = nl80211_policy,
2665 .flags = GENL_ADMIN_PERM,
2666 },
2667 {
2668 .cmd = NL80211_CMD_DEL_MPATH,
2669 .doit = nl80211_del_mpath,
2670 .policy = nl80211_policy,
2671 .flags = GENL_ADMIN_PERM,
2672 },
2673 {
2674 .cmd = NL80211_CMD_SET_BSS,
2675 .doit = nl80211_set_bss,
2676 .policy = nl80211_policy,
2677 .flags = GENL_ADMIN_PERM,
2678 },
2679 {
2680 .cmd = NL80211_CMD_GET_REG,
2681 .doit = nl80211_get_reg,
2682 .policy = nl80211_policy,
2683 /* can be retrieved by unprivileged users */
2684 },
2685 {
2686 .cmd = NL80211_CMD_SET_REG,
2687 .doit = nl80211_set_reg,
2688 .policy = nl80211_policy,
2689 .flags = GENL_ADMIN_PERM,
2690 },
2691 {
2692 .cmd = NL80211_CMD_REQ_SET_REG,
2693 .doit = nl80211_req_set_reg,
2694 .policy = nl80211_policy,
2695 .flags = GENL_ADMIN_PERM,
2696 },
2697 {
2698 .cmd = NL80211_CMD_GET_MESH_PARAMS,
2699 .doit = nl80211_get_mesh_params,
2700 .policy = nl80211_policy,
2701 /* can be retrieved by unprivileged users */
2702 },
2703 {
2704 .cmd = NL80211_CMD_SET_MESH_PARAMS,
2705 .doit = nl80211_set_mesh_params,
2706 .policy = nl80211_policy,
2707 .flags = GENL_ADMIN_PERM,
2708 },
2709 {
2710 .cmd = NL80211_CMD_SET_MGMT_EXTRA_IE,
2711 .doit = nl80211_set_mgmt_extra_ie,
2712 .policy = nl80211_policy,
2713 .flags = GENL_ADMIN_PERM,
2714 },
2715 {
2716 .cmd = NL80211_CMD_TRIGGER_SCAN,
2717 .doit = nl80211_trigger_scan,
2718 .policy = nl80211_policy,
2719 .flags = GENL_ADMIN_PERM,
2720 },
2721 {
2722 .cmd = NL80211_CMD_GET_SCAN,
2723 .policy = nl80211_policy,
2724 .dumpit = nl80211_dump_scan,
2725 },
2726 };
2727
2728 /* multicast groups */
2729 static struct genl_multicast_group nl80211_config_mcgrp = {
2730 .name = "config",
2731 };
2732 static struct genl_multicast_group nl80211_scan_mcgrp = {
2733 .name = "scan",
2734 };
2735
2736 /* notification functions */
2737
2738 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
2739 {
2740 struct sk_buff *msg;
2741
2742 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2743 if (!msg)
2744 return;
2745
2746 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
2747 nlmsg_free(msg);
2748 return;
2749 }
2750
2751 genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
2752 }
2753
2754 static int nl80211_send_scan_donemsg(struct sk_buff *msg,
2755 struct cfg80211_registered_device *rdev,
2756 struct net_device *netdev,
2757 u32 pid, u32 seq, int flags,
2758 u32 cmd)
2759 {
2760 void *hdr;
2761
2762 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
2763 if (!hdr)
2764 return -1;
2765
2766 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->idx);
2767 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
2768
2769 /* XXX: we should probably bounce back the request? */
2770
2771 return genlmsg_end(msg, hdr);
2772
2773 nla_put_failure:
2774 genlmsg_cancel(msg, hdr);
2775 return -EMSGSIZE;
2776 }
2777
2778 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
2779 struct net_device *netdev)
2780 {
2781 struct sk_buff *msg;
2782
2783 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2784 if (!msg)
2785 return;
2786
2787 if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
2788 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
2789 nlmsg_free(msg);
2790 return;
2791 }
2792
2793 genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
2794 }
2795
2796 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
2797 struct net_device *netdev)
2798 {
2799 struct sk_buff *msg;
2800
2801 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2802 if (!msg)
2803 return;
2804
2805 if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
2806 NL80211_CMD_SCAN_ABORTED) < 0) {
2807 nlmsg_free(msg);
2808 return;
2809 }
2810
2811 genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
2812 }
2813
2814 /* initialisation/exit functions */
2815
2816 int nl80211_init(void)
2817 {
2818 int err, i;
2819
2820 err = genl_register_family(&nl80211_fam);
2821 if (err)
2822 return err;
2823
2824 for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
2825 err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
2826 if (err)
2827 goto err_out;
2828 }
2829
2830 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
2831 if (err)
2832 goto err_out;
2833
2834 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
2835 if (err)
2836 goto err_out;
2837
2838 return 0;
2839 err_out:
2840 genl_unregister_family(&nl80211_fam);
2841 return err;
2842 }
2843
2844 void nl80211_exit(void)
2845 {
2846 genl_unregister_family(&nl80211_fam);
2847 }
Linux with added FPC-III support