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V4L/DVB (8434): Fix x86_64 compilation and move some macros to v4l2-ioctl.h
[linux-2.6/kvm.git] / net / wireless / nl80211.c
blobb7fefffd2d0d02e26e307ab6fa78c7120170763c
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
22 /* the netlink family */
23 static struct genl_family nl80211_fam = {
24 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
25 .name = "nl80211", /* have users key off the name instead */
26 .hdrsize = 0, /* no private header */
27 .version = 1, /* no particular meaning now */
28 .maxattr = NL80211_ATTR_MAX,
29 };
30
31 /* internal helper: get drv and dev */
32 static int get_drv_dev_by_info_ifindex(struct genl_info *info,
33 struct cfg80211_registered_device **drv,
34 struct net_device **dev)
35 {
36 int ifindex;
37
38 if (!info->attrs[NL80211_ATTR_IFINDEX])
39 return -EINVAL;
40
41 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
42 *dev = dev_get_by_index(&init_net, ifindex);
43 if (!*dev)
44 return -ENODEV;
45
46 *drv = cfg80211_get_dev_from_ifindex(ifindex);
47 if (IS_ERR(*drv)) {
48 dev_put(*dev);
49 return PTR_ERR(*drv);
50 }
51
52 return 0;
53 }
54
55 /* policy for the attributes */
56 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
57 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
58 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
59 .len = BUS_ID_SIZE-1 },
60
61 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
62 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
63 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
64
65 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
66
67 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
68 .len = WLAN_MAX_KEY_LEN },
69 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
70 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
71 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
72
73 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
74 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
75 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
76 .len = IEEE80211_MAX_DATA_LEN },
77 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
78 .len = IEEE80211_MAX_DATA_LEN },
79 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
80 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
81 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
82 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
83 .len = NL80211_MAX_SUPP_RATES },
84 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
85 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
86 [NL80211_ATTR_MNTR_FLAGS] = { .type = NLA_NESTED },
87 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
88 .len = IEEE80211_MAX_MESH_ID_LEN },
89 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
90 };
91
92 /* message building helper */
93 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
94 int flags, u8 cmd)
95 {
96 /* since there is no private header just add the generic one */
97 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
98 }
99
100 /* netlink command implementations */
101
102 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
103 struct cfg80211_registered_device *dev)
104 {
105 void *hdr;
106 struct nlattr *nl_bands, *nl_band;
107 struct nlattr *nl_freqs, *nl_freq;
108 struct nlattr *nl_rates, *nl_rate;
109 enum ieee80211_band band;
110 struct ieee80211_channel *chan;
111 struct ieee80211_rate *rate;
112 int i;
113
114 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
115 if (!hdr)
116 return -1;
117
118 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx);
119 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
120
121 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
122 if (!nl_bands)
123 goto nla_put_failure;
124
125 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
126 if (!dev->wiphy.bands[band])
127 continue;
128
129 nl_band = nla_nest_start(msg, band);
130 if (!nl_band)
131 goto nla_put_failure;
132
133 /* add frequencies */
134 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
135 if (!nl_freqs)
136 goto nla_put_failure;
137
138 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
139 nl_freq = nla_nest_start(msg, i);
140 if (!nl_freq)
141 goto nla_put_failure;
142
143 chan = &dev->wiphy.bands[band]->channels[i];
144 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
145 chan->center_freq);
146
147 if (chan->flags & IEEE80211_CHAN_DISABLED)
148 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
149 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
150 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
151 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
152 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
153 if (chan->flags & IEEE80211_CHAN_RADAR)
154 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
155
156 nla_nest_end(msg, nl_freq);
157 }
158
159 nla_nest_end(msg, nl_freqs);
160
161 /* add bitrates */
162 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
163 if (!nl_rates)
164 goto nla_put_failure;
165
166 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
167 nl_rate = nla_nest_start(msg, i);
168 if (!nl_rate)
169 goto nla_put_failure;
170
171 rate = &dev->wiphy.bands[band]->bitrates[i];
172 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
173 rate->bitrate);
174 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
175 NLA_PUT_FLAG(msg,
176 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
177
178 nla_nest_end(msg, nl_rate);
179 }
180
181 nla_nest_end(msg, nl_rates);
182
183 nla_nest_end(msg, nl_band);
184 }
185 nla_nest_end(msg, nl_bands);
186
187 return genlmsg_end(msg, hdr);
188
189 nla_put_failure:
190 genlmsg_cancel(msg, hdr);
191 return -EMSGSIZE;
192 }
193
194 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
195 {
196 int idx = 0;
197 int start = cb->args[0];
198 struct cfg80211_registered_device *dev;
199
200 mutex_lock(&cfg80211_drv_mutex);
201 list_for_each_entry(dev, &cfg80211_drv_list, list) {
202 if (++idx <= start)
203 continue;
204 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
205 cb->nlh->nlmsg_seq, NLM_F_MULTI,
206 dev) < 0) {
207 idx--;
208 break;
209 }
210 }
211 mutex_unlock(&cfg80211_drv_mutex);
212
213 cb->args[0] = idx;
214
215 return skb->len;
216 }
217
218 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
219 {
220 struct sk_buff *msg;
221 struct cfg80211_registered_device *dev;
222
223 dev = cfg80211_get_dev_from_info(info);
224 if (IS_ERR(dev))
225 return PTR_ERR(dev);
226
227 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
228 if (!msg)
229 goto out_err;
230
231 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
232 goto out_free;
233
234 cfg80211_put_dev(dev);
235
236 return genlmsg_unicast(msg, info->snd_pid);
237
238 out_free:
239 nlmsg_free(msg);
240 out_err:
241 cfg80211_put_dev(dev);
242 return -ENOBUFS;
243 }
244
245 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
246 {
247 struct cfg80211_registered_device *rdev;
248 int result;
249
250 if (!info->attrs[NL80211_ATTR_WIPHY_NAME])
251 return -EINVAL;
252
253 rdev = cfg80211_get_dev_from_info(info);
254 if (IS_ERR(rdev))
255 return PTR_ERR(rdev);
256
257 result = cfg80211_dev_rename(rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
258
259 cfg80211_put_dev(rdev);
260 return result;
261 }
262
263
264 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
265 struct net_device *dev)
266 {
267 void *hdr;
268
269 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
270 if (!hdr)
271 return -1;
272
273 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
274 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
275 /* TODO: interface type */
276 return genlmsg_end(msg, hdr);
277
278 nla_put_failure:
279 genlmsg_cancel(msg, hdr);
280 return -EMSGSIZE;
281 }
282
283 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
284 {
285 int wp_idx = 0;
286 int if_idx = 0;
287 int wp_start = cb->args[0];
288 int if_start = cb->args[1];
289 struct cfg80211_registered_device *dev;
290 struct wireless_dev *wdev;
291
292 mutex_lock(&cfg80211_drv_mutex);
293 list_for_each_entry(dev, &cfg80211_drv_list, list) {
294 if (++wp_idx < wp_start)
295 continue;
296 if_idx = 0;
297
298 mutex_lock(&dev->devlist_mtx);
299 list_for_each_entry(wdev, &dev->netdev_list, list) {
300 if (++if_idx < if_start)
301 continue;
302 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
303 cb->nlh->nlmsg_seq, NLM_F_MULTI,
304 wdev->netdev) < 0)
305 break;
306 }
307 mutex_unlock(&dev->devlist_mtx);
308 }
309 mutex_unlock(&cfg80211_drv_mutex);
310
311 cb->args[0] = wp_idx;
312 cb->args[1] = if_idx;
313
314 return skb->len;
315 }
316
317 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
318 {
319 struct sk_buff *msg;
320 struct cfg80211_registered_device *dev;
321 struct net_device *netdev;
322 int err;
323
324 err = get_drv_dev_by_info_ifindex(info, &dev, &netdev);
325 if (err)
326 return err;
327
328 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
329 if (!msg)
330 goto out_err;
331
332 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
333 goto out_free;
334
335 dev_put(netdev);
336 cfg80211_put_dev(dev);
337
338 return genlmsg_unicast(msg, info->snd_pid);
339
340 out_free:
341 nlmsg_free(msg);
342 out_err:
343 dev_put(netdev);
344 cfg80211_put_dev(dev);
345 return -ENOBUFS;
346 }
347
348 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
349 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
350 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
351 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
352 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
353 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
354 };
355
356 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
357 {
358 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
359 int flag;
360
361 *mntrflags = 0;
362
363 if (!nla)
364 return -EINVAL;
365
366 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
367 nla, mntr_flags_policy))
368 return -EINVAL;
369
370 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
371 if (flags[flag])
372 *mntrflags |= (1<<flag);
373
374 return 0;
375 }
376
377 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
378 {
379 struct cfg80211_registered_device *drv;
380 struct vif_params params;
381 int err, ifindex;
382 enum nl80211_iftype type;
383 struct net_device *dev;
384 u32 flags;
385
386 memset(&params, 0, sizeof(params));
387
388 if (info->attrs[NL80211_ATTR_IFTYPE]) {
389 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
390 if (type > NL80211_IFTYPE_MAX)
391 return -EINVAL;
392 } else
393 return -EINVAL;
394
395 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
396 if (err)
397 return err;
398 ifindex = dev->ifindex;
399 dev_put(dev);
400
401 if (!drv->ops->change_virtual_intf) {
402 err = -EOPNOTSUPP;
403 goto unlock;
404 }
405
406 if (type == NL80211_IFTYPE_MESH_POINT &&
407 info->attrs[NL80211_ATTR_MESH_ID]) {
408 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
409 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
410 }
411
412 rtnl_lock();
413 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
414 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
415 &flags);
416 err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
417 type, err ? NULL : &flags, &params);
418 rtnl_unlock();
419
420 unlock:
421 cfg80211_put_dev(drv);
422 return err;
423 }
424
425 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
426 {
427 struct cfg80211_registered_device *drv;
428 struct vif_params params;
429 int err;
430 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
431 u32 flags;
432
433 memset(&params, 0, sizeof(params));
434
435 if (!info->attrs[NL80211_ATTR_IFNAME])
436 return -EINVAL;
437
438 if (info->attrs[NL80211_ATTR_IFTYPE]) {
439 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
440 if (type > NL80211_IFTYPE_MAX)
441 return -EINVAL;
442 }
443
444 drv = cfg80211_get_dev_from_info(info);
445 if (IS_ERR(drv))
446 return PTR_ERR(drv);
447
448 if (!drv->ops->add_virtual_intf) {
449 err = -EOPNOTSUPP;
450 goto unlock;
451 }
452
453 if (type == NL80211_IFTYPE_MESH_POINT &&
454 info->attrs[NL80211_ATTR_MESH_ID]) {
455 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
456 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
457 }
458
459 rtnl_lock();
460 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
461 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
462 &flags);
463 err = drv->ops->add_virtual_intf(&drv->wiphy,
464 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
465 type, err ? NULL : &flags, &params);
466 rtnl_unlock();
467
468
469 unlock:
470 cfg80211_put_dev(drv);
471 return err;
472 }
473
474 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
475 {
476 struct cfg80211_registered_device *drv;
477 int ifindex, err;
478 struct net_device *dev;
479
480 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
481 if (err)
482 return err;
483 ifindex = dev->ifindex;
484 dev_put(dev);
485
486 if (!drv->ops->del_virtual_intf) {
487 err = -EOPNOTSUPP;
488 goto out;
489 }
490
491 rtnl_lock();
492 err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
493 rtnl_unlock();
494
495 out:
496 cfg80211_put_dev(drv);
497 return err;
498 }
499
500 struct get_key_cookie {
501 struct sk_buff *msg;
502 int error;
503 };
504
505 static void get_key_callback(void *c, struct key_params *params)
506 {
507 struct get_key_cookie *cookie = c;
508
509 if (params->key)
510 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
511 params->key_len, params->key);
512
513 if (params->seq)
514 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
515 params->seq_len, params->seq);
516
517 if (params->cipher)
518 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
519 params->cipher);
520
521 return;
522 nla_put_failure:
523 cookie->error = 1;
524 }
525
526 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
527 {
528 struct cfg80211_registered_device *drv;
529 int err;
530 struct net_device *dev;
531 u8 key_idx = 0;
532 u8 *mac_addr = NULL;
533 struct get_key_cookie cookie = {
534 .error = 0,
535 };
536 void *hdr;
537 struct sk_buff *msg;
538
539 if (info->attrs[NL80211_ATTR_KEY_IDX])
540 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
541
542 if (key_idx > 3)
543 return -EINVAL;
544
545 if (info->attrs[NL80211_ATTR_MAC])
546 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
547
548 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
549 if (err)
550 return err;
551
552 if (!drv->ops->get_key) {
553 err = -EOPNOTSUPP;
554 goto out;
555 }
556
557 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
558 if (!msg) {
559 err = -ENOMEM;
560 goto out;
561 }
562
563 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
564 NL80211_CMD_NEW_KEY);
565
566 if (IS_ERR(hdr)) {
567 err = PTR_ERR(hdr);
568 goto out;
569 }
570
571 cookie.msg = msg;
572
573 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
574 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
575 if (mac_addr)
576 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
577
578 rtnl_lock();
579 err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
580 &cookie, get_key_callback);
581 rtnl_unlock();
582
583 if (err)
584 goto out;
585
586 if (cookie.error)
587 goto nla_put_failure;
588
589 genlmsg_end(msg, hdr);
590 err = genlmsg_unicast(msg, info->snd_pid);
591 goto out;
592
593 nla_put_failure:
594 err = -ENOBUFS;
595 nlmsg_free(msg);
596 out:
597 cfg80211_put_dev(drv);
598 dev_put(dev);
599 return err;
600 }
601
602 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
603 {
604 struct cfg80211_registered_device *drv;
605 int err;
606 struct net_device *dev;
607 u8 key_idx;
608
609 if (!info->attrs[NL80211_ATTR_KEY_IDX])
610 return -EINVAL;
611
612 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
613
614 if (key_idx > 3)
615 return -EINVAL;
616
617 /* currently only support setting default key */
618 if (!info->attrs[NL80211_ATTR_KEY_DEFAULT])
619 return -EINVAL;
620
621 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
622 if (err)
623 return err;
624
625 if (!drv->ops->set_default_key) {
626 err = -EOPNOTSUPP;
627 goto out;
628 }
629
630 rtnl_lock();
631 err = drv->ops->set_default_key(&drv->wiphy, dev, key_idx);
632 rtnl_unlock();
633
634 out:
635 cfg80211_put_dev(drv);
636 dev_put(dev);
637 return err;
638 }
639
640 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
641 {
642 struct cfg80211_registered_device *drv;
643 int err;
644 struct net_device *dev;
645 struct key_params params;
646 u8 key_idx = 0;
647 u8 *mac_addr = NULL;
648
649 memset(&params, 0, sizeof(params));
650
651 if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
652 return -EINVAL;
653
654 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
655 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
656 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
657 }
658
659 if (info->attrs[NL80211_ATTR_KEY_IDX])
660 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
661
662 params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
663
664 if (info->attrs[NL80211_ATTR_MAC])
665 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
666
667 if (key_idx > 3)
668 return -EINVAL;
669
670 /*
671 * Disallow pairwise keys with non-zero index unless it's WEP
672 * (because current deployments use pairwise WEP keys with
673 * non-zero indizes but 802.11i clearly specifies to use zero)
674 */
675 if (mac_addr && key_idx &&
676 params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
677 params.cipher != WLAN_CIPHER_SUITE_WEP104)
678 return -EINVAL;
679
680 /* TODO: add definitions for the lengths to linux/ieee80211.h */
681 switch (params.cipher) {
682 case WLAN_CIPHER_SUITE_WEP40:
683 if (params.key_len != 5)
684 return -EINVAL;
685 break;
686 case WLAN_CIPHER_SUITE_TKIP:
687 if (params.key_len != 32)
688 return -EINVAL;
689 break;
690 case WLAN_CIPHER_SUITE_CCMP:
691 if (params.key_len != 16)
692 return -EINVAL;
693 break;
694 case WLAN_CIPHER_SUITE_WEP104:
695 if (params.key_len != 13)
696 return -EINVAL;
697 break;
698 default:
699 return -EINVAL;
700 }
701
702 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
703 if (err)
704 return err;
705
706 if (!drv->ops->add_key) {
707 err = -EOPNOTSUPP;
708 goto out;
709 }
710
711 rtnl_lock();
712 err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
713 rtnl_unlock();
714
715 out:
716 cfg80211_put_dev(drv);
717 dev_put(dev);
718 return err;
719 }
720
721 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
722 {
723 struct cfg80211_registered_device *drv;
724 int err;
725 struct net_device *dev;
726 u8 key_idx = 0;
727 u8 *mac_addr = NULL;
728
729 if (info->attrs[NL80211_ATTR_KEY_IDX])
730 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
731
732 if (key_idx > 3)
733 return -EINVAL;
734
735 if (info->attrs[NL80211_ATTR_MAC])
736 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
737
738 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
739 if (err)
740 return err;
741
742 if (!drv->ops->del_key) {
743 err = -EOPNOTSUPP;
744 goto out;
745 }
746
747 rtnl_lock();
748 err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
749 rtnl_unlock();
750
751 out:
752 cfg80211_put_dev(drv);
753 dev_put(dev);
754 return err;
755 }
756
757 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
758 {
759 int (*call)(struct wiphy *wiphy, struct net_device *dev,
760 struct beacon_parameters *info);
761 struct cfg80211_registered_device *drv;
762 int err;
763 struct net_device *dev;
764 struct beacon_parameters params;
765 int haveinfo = 0;
766
767 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
768 if (err)
769 return err;
770
771 switch (info->genlhdr->cmd) {
772 case NL80211_CMD_NEW_BEACON:
773 /* these are required for NEW_BEACON */
774 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
775 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
776 !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
777 err = -EINVAL;
778 goto out;
779 }
780
781 call = drv->ops->add_beacon;
782 break;
783 case NL80211_CMD_SET_BEACON:
784 call = drv->ops->set_beacon;
785 break;
786 default:
787 WARN_ON(1);
788 err = -EOPNOTSUPP;
789 goto out;
790 }
791
792 if (!call) {
793 err = -EOPNOTSUPP;
794 goto out;
795 }
796
797 memset(&params, 0, sizeof(params));
798
799 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
800 params.interval =
801 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
802 haveinfo = 1;
803 }
804
805 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
806 params.dtim_period =
807 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
808 haveinfo = 1;
809 }
810
811 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
812 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
813 params.head_len =
814 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
815 haveinfo = 1;
816 }
817
818 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
819 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
820 params.tail_len =
821 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
822 haveinfo = 1;
823 }
824
825 if (!haveinfo) {
826 err = -EINVAL;
827 goto out;
828 }
829
830 rtnl_lock();
831 err = call(&drv->wiphy, dev, &params);
832 rtnl_unlock();
833
834 out:
835 cfg80211_put_dev(drv);
836 dev_put(dev);
837 return err;
838 }
839
840 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
841 {
842 struct cfg80211_registered_device *drv;
843 int err;
844 struct net_device *dev;
845
846 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
847 if (err)
848 return err;
849
850 if (!drv->ops->del_beacon) {
851 err = -EOPNOTSUPP;
852 goto out;
853 }
854
855 rtnl_lock();
856 err = drv->ops->del_beacon(&drv->wiphy, dev);
857 rtnl_unlock();
858
859 out:
860 cfg80211_put_dev(drv);
861 dev_put(dev);
862 return err;
863 }
864
865 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
866 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
867 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
868 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
869 };
870
871 static int parse_station_flags(struct nlattr *nla, u32 *staflags)
872 {
873 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
874 int flag;
875
876 *staflags = 0;
877
878 if (!nla)
879 return 0;
880
881 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
882 nla, sta_flags_policy))
883 return -EINVAL;
884
885 *staflags = STATION_FLAG_CHANGED;
886
887 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
888 if (flags[flag])
889 *staflags |= (1<<flag);
890
891 return 0;
892 }
893
894 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
895 int flags, struct net_device *dev,
896 u8 *mac_addr, struct station_info *sinfo)
897 {
898 void *hdr;
899 struct nlattr *sinfoattr;
900
901 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
902 if (!hdr)
903 return -1;
904
905 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
906 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
907
908 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
909 if (!sinfoattr)
910 goto nla_put_failure;
911 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
912 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
913 sinfo->inactive_time);
914 if (sinfo->filled & STATION_INFO_RX_BYTES)
915 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
916 sinfo->rx_bytes);
917 if (sinfo->filled & STATION_INFO_TX_BYTES)
918 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
919 sinfo->tx_bytes);
920 if (sinfo->filled & STATION_INFO_LLID)
921 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
922 sinfo->llid);
923 if (sinfo->filled & STATION_INFO_PLID)
924 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
925 sinfo->plid);
926 if (sinfo->filled & STATION_INFO_PLINK_STATE)
927 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
928 sinfo->plink_state);
929
930 nla_nest_end(msg, sinfoattr);
931
932 return genlmsg_end(msg, hdr);
933
934 nla_put_failure:
935 genlmsg_cancel(msg, hdr);
936 return -EMSGSIZE;
937 }
938
939 static int nl80211_dump_station(struct sk_buff *skb,
940 struct netlink_callback *cb)
941 {
942 int wp_idx = 0;
943 int if_idx = 0;
944 int sta_idx = cb->args[2];
945 int wp_start = cb->args[0];
946 int if_start = cb->args[1];
947 struct station_info sinfo;
948 struct cfg80211_registered_device *dev;
949 struct wireless_dev *wdev;
950 u8 mac_addr[ETH_ALEN];
951 int err;
952 int exit = 0;
953
954 /* TODO: filter by device */
955 mutex_lock(&cfg80211_drv_mutex);
956 list_for_each_entry(dev, &cfg80211_drv_list, list) {
957 if (exit)
958 break;
959 if (++wp_idx < wp_start)
960 continue;
961 if_idx = 0;
962
963 mutex_lock(&dev->devlist_mtx);
964 list_for_each_entry(wdev, &dev->netdev_list, list) {
965 if (exit)
966 break;
967 if (++if_idx < if_start)
968 continue;
969 if (!dev->ops->dump_station)
970 continue;
971
972 for (;; ++sta_idx) {
973 rtnl_lock();
974 err = dev->ops->dump_station(&dev->wiphy,
975 wdev->netdev, sta_idx, mac_addr,
976 &sinfo);
977 rtnl_unlock();
978 if (err) {
979 sta_idx = 0;
980 break;
981 }
982 if (nl80211_send_station(skb,
983 NETLINK_CB(cb->skb).pid,
984 cb->nlh->nlmsg_seq, NLM_F_MULTI,
985 wdev->netdev, mac_addr,
986 &sinfo) < 0) {
987 exit = 1;
988 break;
989 }
990 }
991 }
992 mutex_unlock(&dev->devlist_mtx);
993 }
994 mutex_unlock(&cfg80211_drv_mutex);
995
996 cb->args[0] = wp_idx;
997 cb->args[1] = if_idx;
998 cb->args[2] = sta_idx;
999
1000 return skb->len;
1001 }
1002
1003 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1004 {
1005 struct cfg80211_registered_device *drv;
1006 int err;
1007 struct net_device *dev;
1008 struct station_info sinfo;
1009 struct sk_buff *msg;
1010 u8 *mac_addr = NULL;
1011
1012 memset(&sinfo, 0, sizeof(sinfo));
1013
1014 if (!info->attrs[NL80211_ATTR_MAC])
1015 return -EINVAL;
1016
1017 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1018
1019 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
1020 if (err)
1021 return err;
1022
1023 if (!drv->ops->get_station) {
1024 err = -EOPNOTSUPP;
1025 goto out;
1026 }
1027
1028 rtnl_lock();
1029 err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1030 rtnl_unlock();
1031
1032 if (err)
1033 goto out;
1034
1035 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1036 if (!msg)
1037 goto out;
1038
1039 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1040 dev, mac_addr, &sinfo) < 0)
1041 goto out_free;
1042
1043 err = genlmsg_unicast(msg, info->snd_pid);
1044 goto out;
1045
1046 out_free:
1047 nlmsg_free(msg);
1048
1049 out:
1050 cfg80211_put_dev(drv);
1051 dev_put(dev);
1052 return err;
1053 }
1054
1055 /*
1056 * Get vlan interface making sure it is on the right wiphy.
1057 */
1058 static int get_vlan(struct nlattr *vlanattr,
1059 struct cfg80211_registered_device *rdev,
1060 struct net_device **vlan)
1061 {
1062 *vlan = NULL;
1063
1064 if (vlanattr) {
1065 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1066 if (!*vlan)
1067 return -ENODEV;
1068 if (!(*vlan)->ieee80211_ptr)
1069 return -EINVAL;
1070 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1071 return -EINVAL;
1072 }
1073 return 0;
1074 }
1075
1076 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1077 {
1078 struct cfg80211_registered_device *drv;
1079 int err;
1080 struct net_device *dev;
1081 struct station_parameters params;
1082 u8 *mac_addr = NULL;
1083
1084 memset(&params, 0, sizeof(params));
1085
1086 params.listen_interval = -1;
1087
1088 if (info->attrs[NL80211_ATTR_STA_AID])
1089 return -EINVAL;
1090
1091 if (!info->attrs[NL80211_ATTR_MAC])
1092 return -EINVAL;
1093
1094 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1095
1096 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1097 params.supported_rates =
1098 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1099 params.supported_rates_len =
1100 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1101 }
1102
1103 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1104 params.listen_interval =
1105 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1106
1107 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1108 &params.station_flags))
1109 return -EINVAL;
1110
1111 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1112 params.plink_action =
1113 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1114
1115 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
1116 if (err)
1117 return err;
1118
1119 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1120 if (err)
1121 goto out;
1122
1123 if (!drv->ops->change_station) {
1124 err = -EOPNOTSUPP;
1125 goto out;
1126 }
1127
1128 rtnl_lock();
1129 err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1130 rtnl_unlock();
1131
1132 out:
1133 if (params.vlan)
1134 dev_put(params.vlan);
1135 cfg80211_put_dev(drv);
1136 dev_put(dev);
1137 return err;
1138 }
1139
1140 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1141 {
1142 struct cfg80211_registered_device *drv;
1143 int err;
1144 struct net_device *dev;
1145 struct station_parameters params;
1146 u8 *mac_addr = NULL;
1147
1148 memset(&params, 0, sizeof(params));
1149
1150 if (!info->attrs[NL80211_ATTR_MAC])
1151 return -EINVAL;
1152
1153 if (!info->attrs[NL80211_ATTR_STA_AID])
1154 return -EINVAL;
1155
1156 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1157 return -EINVAL;
1158
1159 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1160 return -EINVAL;
1161
1162 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1163 params.supported_rates =
1164 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1165 params.supported_rates_len =
1166 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1167 params.listen_interval =
1168 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1169 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1170
1171 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1172 &params.station_flags))
1173 return -EINVAL;
1174
1175 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
1176 if (err)
1177 return err;
1178
1179 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1180 if (err)
1181 goto out;
1182
1183 if (!drv->ops->add_station) {
1184 err = -EOPNOTSUPP;
1185 goto out;
1186 }
1187
1188 rtnl_lock();
1189 err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1190 rtnl_unlock();
1191
1192 out:
1193 if (params.vlan)
1194 dev_put(params.vlan);
1195 cfg80211_put_dev(drv);
1196 dev_put(dev);
1197 return err;
1198 }
1199
1200 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1201 {
1202 struct cfg80211_registered_device *drv;
1203 int err;
1204 struct net_device *dev;
1205 u8 *mac_addr = NULL;
1206
1207 if (info->attrs[NL80211_ATTR_MAC])
1208 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1209
1210 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
1211 if (err)
1212 return err;
1213
1214 if (!drv->ops->del_station) {
1215 err = -EOPNOTSUPP;
1216 goto out;
1217 }
1218
1219 rtnl_lock();
1220 err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1221 rtnl_unlock();
1222
1223 out:
1224 cfg80211_put_dev(drv);
1225 dev_put(dev);
1226 return err;
1227 }
1228
1229 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1230 int flags, struct net_device *dev,
1231 u8 *dst, u8 *next_hop,
1232 struct mpath_info *pinfo)
1233 {
1234 void *hdr;
1235 struct nlattr *pinfoattr;
1236
1237 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1238 if (!hdr)
1239 return -1;
1240
1241 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1242 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1243 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1244
1245 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1246 if (!pinfoattr)
1247 goto nla_put_failure;
1248 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1249 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1250 pinfo->frame_qlen);
1251 if (pinfo->filled & MPATH_INFO_DSN)
1252 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1253 pinfo->dsn);
1254 if (pinfo->filled & MPATH_INFO_METRIC)
1255 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1256 pinfo->metric);
1257 if (pinfo->filled & MPATH_INFO_EXPTIME)
1258 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1259 pinfo->exptime);
1260 if (pinfo->filled & MPATH_INFO_FLAGS)
1261 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1262 pinfo->flags);
1263 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1264 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1265 pinfo->discovery_timeout);
1266 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1267 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1268 pinfo->discovery_retries);
1269
1270 nla_nest_end(msg, pinfoattr);
1271
1272 return genlmsg_end(msg, hdr);
1273
1274 nla_put_failure:
1275 genlmsg_cancel(msg, hdr);
1276 return -EMSGSIZE;
1277 }
1278
1279 static int nl80211_dump_mpath(struct sk_buff *skb,
1280 struct netlink_callback *cb)
1281 {
1282 int wp_idx = 0;
1283 int if_idx = 0;
1284 int sta_idx = cb->args[2];
1285 int wp_start = cb->args[0];
1286 int if_start = cb->args[1];
1287 struct mpath_info pinfo;
1288 struct cfg80211_registered_device *dev;
1289 struct wireless_dev *wdev;
1290 u8 dst[ETH_ALEN];
1291 u8 next_hop[ETH_ALEN];
1292 int err;
1293 int exit = 0;
1294
1295 /* TODO: filter by device */
1296 mutex_lock(&cfg80211_drv_mutex);
1297 list_for_each_entry(dev, &cfg80211_drv_list, list) {
1298 if (exit)
1299 break;
1300 if (++wp_idx < wp_start)
1301 continue;
1302 if_idx = 0;
1303
1304 mutex_lock(&dev->devlist_mtx);
1305 list_for_each_entry(wdev, &dev->netdev_list, list) {
1306 if (exit)
1307 break;
1308 if (++if_idx < if_start)
1309 continue;
1310 if (!dev->ops->dump_mpath)
1311 continue;
1312
1313 for (;; ++sta_idx) {
1314 rtnl_lock();
1315 err = dev->ops->dump_mpath(&dev->wiphy,
1316 wdev->netdev, sta_idx, dst,
1317 next_hop, &pinfo);
1318 rtnl_unlock();
1319 if (err) {
1320 sta_idx = 0;
1321 break;
1322 }
1323 if (nl80211_send_mpath(skb,
1324 NETLINK_CB(cb->skb).pid,
1325 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1326 wdev->netdev, dst, next_hop,
1327 &pinfo) < 0) {
1328 exit = 1;
1329 break;
1330 }
1331 }
1332 }
1333 mutex_unlock(&dev->devlist_mtx);
1334 }
1335 mutex_unlock(&cfg80211_drv_mutex);
1336
1337 cb->args[0] = wp_idx;
1338 cb->args[1] = if_idx;
1339 cb->args[2] = sta_idx;
1340
1341 return skb->len;
1342 }
1343
1344 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1345 {
1346 struct cfg80211_registered_device *drv;
1347 int err;
1348 struct net_device *dev;
1349 struct mpath_info pinfo;
1350 struct sk_buff *msg;
1351 u8 *dst = NULL;
1352 u8 next_hop[ETH_ALEN];
1353
1354 memset(&pinfo, 0, sizeof(pinfo));
1355
1356 if (!info->attrs[NL80211_ATTR_MAC])
1357 return -EINVAL;
1358
1359 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1360
1361 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
1362 if (err)
1363 return err;
1364
1365 if (!drv->ops->get_mpath) {
1366 err = -EOPNOTSUPP;
1367 goto out;
1368 }
1369
1370 rtnl_lock();
1371 err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1372 rtnl_unlock();
1373
1374 if (err)
1375 goto out;
1376
1377 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1378 if (!msg)
1379 goto out;
1380
1381 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1382 dev, dst, next_hop, &pinfo) < 0)
1383 goto out_free;
1384
1385 err = genlmsg_unicast(msg, info->snd_pid);
1386 goto out;
1387
1388 out_free:
1389 nlmsg_free(msg);
1390
1391 out:
1392 cfg80211_put_dev(drv);
1393 dev_put(dev);
1394 return err;
1395 }
1396
1397 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
1398 {
1399 struct cfg80211_registered_device *drv;
1400 int err;
1401 struct net_device *dev;
1402 u8 *dst = NULL;
1403 u8 *next_hop = NULL;
1404
1405 if (!info->attrs[NL80211_ATTR_MAC])
1406 return -EINVAL;
1407
1408 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1409 return -EINVAL;
1410
1411 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1412 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1413
1414 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
1415 if (err)
1416 return err;
1417
1418 if (!drv->ops->change_mpath) {
1419 err = -EOPNOTSUPP;
1420 goto out;
1421 }
1422
1423 rtnl_lock();
1424 err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
1425 rtnl_unlock();
1426
1427 out:
1428 cfg80211_put_dev(drv);
1429 dev_put(dev);
1430 return err;
1431 }
1432 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
1433 {
1434 struct cfg80211_registered_device *drv;
1435 int err;
1436 struct net_device *dev;
1437 u8 *dst = NULL;
1438 u8 *next_hop = NULL;
1439
1440 if (!info->attrs[NL80211_ATTR_MAC])
1441 return -EINVAL;
1442
1443 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1444 return -EINVAL;
1445
1446 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1447 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1448
1449 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
1450 if (err)
1451 return err;
1452
1453 if (!drv->ops->add_mpath) {
1454 err = -EOPNOTSUPP;
1455 goto out;
1456 }
1457
1458 rtnl_lock();
1459 err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
1460 rtnl_unlock();
1461
1462 out:
1463 cfg80211_put_dev(drv);
1464 dev_put(dev);
1465 return err;
1466 }
1467
1468 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
1469 {
1470 struct cfg80211_registered_device *drv;
1471 int err;
1472 struct net_device *dev;
1473 u8 *dst = NULL;
1474
1475 if (info->attrs[NL80211_ATTR_MAC])
1476 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1477
1478 err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
1479 if (err)
1480 return err;
1481
1482 if (!drv->ops->del_mpath) {
1483 err = -EOPNOTSUPP;
1484 goto out;
1485 }
1486
1487 rtnl_lock();
1488 err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
1489 rtnl_unlock();
1490
1491 out:
1492 cfg80211_put_dev(drv);
1493 dev_put(dev);
1494 return err;
1495 }
1496
1497 static struct genl_ops nl80211_ops[] = {
1498 {
1499 .cmd = NL80211_CMD_GET_WIPHY,
1500 .doit = nl80211_get_wiphy,
1501 .dumpit = nl80211_dump_wiphy,
1502 .policy = nl80211_policy,
1503 /* can be retrieved by unprivileged users */
1504 },
1505 {
1506 .cmd = NL80211_CMD_SET_WIPHY,
1507 .doit = nl80211_set_wiphy,
1508 .policy = nl80211_policy,
1509 .flags = GENL_ADMIN_PERM,
1510 },
1511 {
1512 .cmd = NL80211_CMD_GET_INTERFACE,
1513 .doit = nl80211_get_interface,
1514 .dumpit = nl80211_dump_interface,
1515 .policy = nl80211_policy,
1516 /* can be retrieved by unprivileged users */
1517 },
1518 {
1519 .cmd = NL80211_CMD_SET_INTERFACE,
1520 .doit = nl80211_set_interface,
1521 .policy = nl80211_policy,
1522 .flags = GENL_ADMIN_PERM,
1523 },
1524 {
1525 .cmd = NL80211_CMD_NEW_INTERFACE,
1526 .doit = nl80211_new_interface,
1527 .policy = nl80211_policy,
1528 .flags = GENL_ADMIN_PERM,
1529 },
1530 {
1531 .cmd = NL80211_CMD_DEL_INTERFACE,
1532 .doit = nl80211_del_interface,
1533 .policy = nl80211_policy,
1534 .flags = GENL_ADMIN_PERM,
1535 },
1536 {
1537 .cmd = NL80211_CMD_GET_KEY,
1538 .doit = nl80211_get_key,
1539 .policy = nl80211_policy,
1540 .flags = GENL_ADMIN_PERM,
1541 },
1542 {
1543 .cmd = NL80211_CMD_SET_KEY,
1544 .doit = nl80211_set_key,
1545 .policy = nl80211_policy,
1546 .flags = GENL_ADMIN_PERM,
1547 },
1548 {
1549 .cmd = NL80211_CMD_NEW_KEY,
1550 .doit = nl80211_new_key,
1551 .policy = nl80211_policy,
1552 .flags = GENL_ADMIN_PERM,
1553 },
1554 {
1555 .cmd = NL80211_CMD_DEL_KEY,
1556 .doit = nl80211_del_key,
1557 .policy = nl80211_policy,
1558 .flags = GENL_ADMIN_PERM,
1559 },
1560 {
1561 .cmd = NL80211_CMD_SET_BEACON,
1562 .policy = nl80211_policy,
1563 .flags = GENL_ADMIN_PERM,
1564 .doit = nl80211_addset_beacon,
1565 },
1566 {
1567 .cmd = NL80211_CMD_NEW_BEACON,
1568 .policy = nl80211_policy,
1569 .flags = GENL_ADMIN_PERM,
1570 .doit = nl80211_addset_beacon,
1571 },
1572 {
1573 .cmd = NL80211_CMD_DEL_BEACON,
1574 .policy = nl80211_policy,
1575 .flags = GENL_ADMIN_PERM,
1576 .doit = nl80211_del_beacon,
1577 },
1578 {
1579 .cmd = NL80211_CMD_GET_STATION,
1580 .doit = nl80211_get_station,
1581 .dumpit = nl80211_dump_station,
1582 .policy = nl80211_policy,
1583 .flags = GENL_ADMIN_PERM,
1584 },
1585 {
1586 .cmd = NL80211_CMD_SET_STATION,
1587 .doit = nl80211_set_station,
1588 .policy = nl80211_policy,
1589 .flags = GENL_ADMIN_PERM,
1590 },
1591 {
1592 .cmd = NL80211_CMD_NEW_STATION,
1593 .doit = nl80211_new_station,
1594 .policy = nl80211_policy,
1595 .flags = GENL_ADMIN_PERM,
1596 },
1597 {
1598 .cmd = NL80211_CMD_DEL_STATION,
1599 .doit = nl80211_del_station,
1600 .policy = nl80211_policy,
1601 .flags = GENL_ADMIN_PERM,
1602 },
1603 {
1604 .cmd = NL80211_CMD_GET_MPATH,
1605 .doit = nl80211_get_mpath,
1606 .dumpit = nl80211_dump_mpath,
1607 .policy = nl80211_policy,
1608 .flags = GENL_ADMIN_PERM,
1609 },
1610 {
1611 .cmd = NL80211_CMD_SET_MPATH,
1612 .doit = nl80211_set_mpath,
1613 .policy = nl80211_policy,
1614 .flags = GENL_ADMIN_PERM,
1615 },
1616 {
1617 .cmd = NL80211_CMD_NEW_MPATH,
1618 .doit = nl80211_new_mpath,
1619 .policy = nl80211_policy,
1620 .flags = GENL_ADMIN_PERM,
1621 },
1622 {
1623 .cmd = NL80211_CMD_DEL_MPATH,
1624 .doit = nl80211_del_mpath,
1625 .policy = nl80211_policy,
1626 .flags = GENL_ADMIN_PERM,
1627 },
1628 };
1629
1630 /* multicast groups */
1631 static struct genl_multicast_group nl80211_config_mcgrp = {
1632 .name = "config",
1633 };
1634
1635 /* notification functions */
1636
1637 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
1638 {
1639 struct sk_buff *msg;
1640
1641 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1642 if (!msg)
1643 return;
1644
1645 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
1646 nlmsg_free(msg);
1647 return;
1648 }
1649
1650 genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
1651 }
1652
1653 /* initialisation/exit functions */
1654
1655 int nl80211_init(void)
1656 {
1657 int err, i;
1658
1659 err = genl_register_family(&nl80211_fam);
1660 if (err)
1661 return err;
1662
1663 for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
1664 err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
1665 if (err)
1666 goto err_out;
1667 }
1668
1669 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
1670 if (err)
1671 goto err_out;
1672
1673 return 0;
1674 err_out:
1675 genl_unregister_family(&nl80211_fam);
1676 return err;
1677 }
1678
1679 void nl80211_exit(void)
1680 {
1681 genl_unregister_family(&nl80211_fam);
1682 }
kernel-based virtual machine