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exec: make argv/envp memory visible to oom-killer
[linux/fpc-iii.git] / net / wireless / nl80211.c
blob59eb2cf42e5f68059618f56f67b3f3f38e2a4c66
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 nlattr **attrs,
33 struct cfg80211_registered_device **drv,
34 struct net_device **dev)
35 {
36 int ifindex;
37
38 if (!attrs[NL80211_ATTR_IFINDEX])
39 return -EINVAL;
40
41 ifindex = nla_get_u32(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 wp_idx++;
296 continue;
297 }
298 if_idx = 0;
299
300 mutex_lock(&dev->devlist_mtx);
301 list_for_each_entry(wdev, &dev->netdev_list, list) {
302 if (if_idx < if_start) {
303 if_idx++;
304 continue;
305 }
306 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
307 cb->nlh->nlmsg_seq, NLM_F_MULTI,
308 wdev->netdev) < 0) {
309 mutex_unlock(&dev->devlist_mtx);
310 goto out;
311 }
312 if_idx++;
313 }
314 mutex_unlock(&dev->devlist_mtx);
315
316 wp_idx++;
317 }
318 out:
319 mutex_unlock(&cfg80211_drv_mutex);
320
321 cb->args[0] = wp_idx;
322 cb->args[1] = if_idx;
323
324 return skb->len;
325 }
326
327 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
328 {
329 struct sk_buff *msg;
330 struct cfg80211_registered_device *dev;
331 struct net_device *netdev;
332 int err;
333
334 err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
335 if (err)
336 return err;
337
338 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
339 if (!msg)
340 goto out_err;
341
342 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
343 goto out_free;
344
345 dev_put(netdev);
346 cfg80211_put_dev(dev);
347
348 return genlmsg_unicast(msg, info->snd_pid);
349
350 out_free:
351 nlmsg_free(msg);
352 out_err:
353 dev_put(netdev);
354 cfg80211_put_dev(dev);
355 return -ENOBUFS;
356 }
357
358 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
359 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
360 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
361 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
362 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
363 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
364 };
365
366 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
367 {
368 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
369 int flag;
370
371 *mntrflags = 0;
372
373 if (!nla)
374 return -EINVAL;
375
376 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
377 nla, mntr_flags_policy))
378 return -EINVAL;
379
380 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
381 if (flags[flag])
382 *mntrflags |= (1<<flag);
383
384 return 0;
385 }
386
387 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
388 {
389 struct cfg80211_registered_device *drv;
390 struct vif_params params;
391 int err, ifindex;
392 enum nl80211_iftype type;
393 struct net_device *dev;
394 u32 flags;
395
396 memset(&params, 0, sizeof(params));
397
398 if (info->attrs[NL80211_ATTR_IFTYPE]) {
399 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
400 if (type > NL80211_IFTYPE_MAX)
401 return -EINVAL;
402 } else
403 return -EINVAL;
404
405 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
406 if (err)
407 return err;
408 ifindex = dev->ifindex;
409 dev_put(dev);
410
411 if (!drv->ops->change_virtual_intf) {
412 err = -EOPNOTSUPP;
413 goto unlock;
414 }
415
416 if (type == NL80211_IFTYPE_MESH_POINT &&
417 info->attrs[NL80211_ATTR_MESH_ID]) {
418 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
419 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
420 }
421
422 rtnl_lock();
423 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
424 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
425 &flags);
426 err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
427 type, err ? NULL : &flags, &params);
428 rtnl_unlock();
429
430 unlock:
431 cfg80211_put_dev(drv);
432 return err;
433 }
434
435 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
436 {
437 struct cfg80211_registered_device *drv;
438 struct vif_params params;
439 int err;
440 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
441 u32 flags;
442
443 memset(&params, 0, sizeof(params));
444
445 if (!info->attrs[NL80211_ATTR_IFNAME])
446 return -EINVAL;
447
448 if (info->attrs[NL80211_ATTR_IFTYPE]) {
449 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
450 if (type > NL80211_IFTYPE_MAX)
451 return -EINVAL;
452 }
453
454 drv = cfg80211_get_dev_from_info(info);
455 if (IS_ERR(drv))
456 return PTR_ERR(drv);
457
458 if (!drv->ops->add_virtual_intf) {
459 err = -EOPNOTSUPP;
460 goto unlock;
461 }
462
463 if (type == NL80211_IFTYPE_MESH_POINT &&
464 info->attrs[NL80211_ATTR_MESH_ID]) {
465 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
466 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
467 }
468
469 rtnl_lock();
470 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
471 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
472 &flags);
473 err = drv->ops->add_virtual_intf(&drv->wiphy,
474 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
475 type, err ? NULL : &flags, &params);
476 rtnl_unlock();
477
478
479 unlock:
480 cfg80211_put_dev(drv);
481 return err;
482 }
483
484 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
485 {
486 struct cfg80211_registered_device *drv;
487 int ifindex, err;
488 struct net_device *dev;
489
490 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
491 if (err)
492 return err;
493 ifindex = dev->ifindex;
494 dev_put(dev);
495
496 if (!drv->ops->del_virtual_intf) {
497 err = -EOPNOTSUPP;
498 goto out;
499 }
500
501 rtnl_lock();
502 err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
503 rtnl_unlock();
504
505 out:
506 cfg80211_put_dev(drv);
507 return err;
508 }
509
510 struct get_key_cookie {
511 struct sk_buff *msg;
512 int error;
513 };
514
515 static void get_key_callback(void *c, struct key_params *params)
516 {
517 struct get_key_cookie *cookie = c;
518
519 if (params->key)
520 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
521 params->key_len, params->key);
522
523 if (params->seq)
524 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
525 params->seq_len, params->seq);
526
527 if (params->cipher)
528 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
529 params->cipher);
530
531 return;
532 nla_put_failure:
533 cookie->error = 1;
534 }
535
536 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
537 {
538 struct cfg80211_registered_device *drv;
539 int err;
540 struct net_device *dev;
541 u8 key_idx = 0;
542 u8 *mac_addr = NULL;
543 struct get_key_cookie cookie = {
544 .error = 0,
545 };
546 void *hdr;
547 struct sk_buff *msg;
548
549 if (info->attrs[NL80211_ATTR_KEY_IDX])
550 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
551
552 if (key_idx > 3)
553 return -EINVAL;
554
555 if (info->attrs[NL80211_ATTR_MAC])
556 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
557
558 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
559 if (err)
560 return err;
561
562 if (!drv->ops->get_key) {
563 err = -EOPNOTSUPP;
564 goto out;
565 }
566
567 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
568 if (!msg) {
569 err = -ENOMEM;
570 goto out;
571 }
572
573 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
574 NL80211_CMD_NEW_KEY);
575
576 if (IS_ERR(hdr)) {
577 err = PTR_ERR(hdr);
578 goto out;
579 }
580
581 cookie.msg = msg;
582
583 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
584 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
585 if (mac_addr)
586 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
587
588 rtnl_lock();
589 err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
590 &cookie, get_key_callback);
591 rtnl_unlock();
592
593 if (err)
594 goto out;
595
596 if (cookie.error)
597 goto nla_put_failure;
598
599 genlmsg_end(msg, hdr);
600 err = genlmsg_unicast(msg, info->snd_pid);
601 goto out;
602
603 nla_put_failure:
604 err = -ENOBUFS;
605 nlmsg_free(msg);
606 out:
607 cfg80211_put_dev(drv);
608 dev_put(dev);
609 return err;
610 }
611
612 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
613 {
614 struct cfg80211_registered_device *drv;
615 int err;
616 struct net_device *dev;
617 u8 key_idx;
618
619 if (!info->attrs[NL80211_ATTR_KEY_IDX])
620 return -EINVAL;
621
622 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
623
624 if (key_idx > 3)
625 return -EINVAL;
626
627 /* currently only support setting default key */
628 if (!info->attrs[NL80211_ATTR_KEY_DEFAULT])
629 return -EINVAL;
630
631 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
632 if (err)
633 return err;
634
635 if (!drv->ops->set_default_key) {
636 err = -EOPNOTSUPP;
637 goto out;
638 }
639
640 rtnl_lock();
641 err = drv->ops->set_default_key(&drv->wiphy, dev, key_idx);
642 rtnl_unlock();
643
644 out:
645 cfg80211_put_dev(drv);
646 dev_put(dev);
647 return err;
648 }
649
650 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
651 {
652 struct cfg80211_registered_device *drv;
653 int err;
654 struct net_device *dev;
655 struct key_params params;
656 u8 key_idx = 0;
657 u8 *mac_addr = NULL;
658
659 memset(&params, 0, sizeof(params));
660
661 if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
662 return -EINVAL;
663
664 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
665 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
666 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
667 }
668
669 if (info->attrs[NL80211_ATTR_KEY_IDX])
670 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
671
672 params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
673
674 if (info->attrs[NL80211_ATTR_MAC])
675 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
676
677 if (key_idx > 3)
678 return -EINVAL;
679
680 /*
681 * Disallow pairwise keys with non-zero index unless it's WEP
682 * (because current deployments use pairwise WEP keys with
683 * non-zero indizes but 802.11i clearly specifies to use zero)
684 */
685 if (mac_addr && key_idx &&
686 params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
687 params.cipher != WLAN_CIPHER_SUITE_WEP104)
688 return -EINVAL;
689
690 /* TODO: add definitions for the lengths to linux/ieee80211.h */
691 switch (params.cipher) {
692 case WLAN_CIPHER_SUITE_WEP40:
693 if (params.key_len != 5)
694 return -EINVAL;
695 break;
696 case WLAN_CIPHER_SUITE_TKIP:
697 if (params.key_len != 32)
698 return -EINVAL;
699 break;
700 case WLAN_CIPHER_SUITE_CCMP:
701 if (params.key_len != 16)
702 return -EINVAL;
703 break;
704 case WLAN_CIPHER_SUITE_WEP104:
705 if (params.key_len != 13)
706 return -EINVAL;
707 break;
708 default:
709 return -EINVAL;
710 }
711
712 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
713 if (err)
714 return err;
715
716 if (!drv->ops->add_key) {
717 err = -EOPNOTSUPP;
718 goto out;
719 }
720
721 rtnl_lock();
722 err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
723 rtnl_unlock();
724
725 out:
726 cfg80211_put_dev(drv);
727 dev_put(dev);
728 return err;
729 }
730
731 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
732 {
733 struct cfg80211_registered_device *drv;
734 int err;
735 struct net_device *dev;
736 u8 key_idx = 0;
737 u8 *mac_addr = NULL;
738
739 if (info->attrs[NL80211_ATTR_KEY_IDX])
740 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
741
742 if (key_idx > 3)
743 return -EINVAL;
744
745 if (info->attrs[NL80211_ATTR_MAC])
746 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
747
748 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
749 if (err)
750 return err;
751
752 if (!drv->ops->del_key) {
753 err = -EOPNOTSUPP;
754 goto out;
755 }
756
757 rtnl_lock();
758 err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
759 rtnl_unlock();
760
761 out:
762 cfg80211_put_dev(drv);
763 dev_put(dev);
764 return err;
765 }
766
767 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
768 {
769 int (*call)(struct wiphy *wiphy, struct net_device *dev,
770 struct beacon_parameters *info);
771 struct cfg80211_registered_device *drv;
772 int err;
773 struct net_device *dev;
774 struct beacon_parameters params;
775 int haveinfo = 0;
776
777 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
778 if (err)
779 return err;
780
781 switch (info->genlhdr->cmd) {
782 case NL80211_CMD_NEW_BEACON:
783 /* these are required for NEW_BEACON */
784 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
785 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
786 !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
787 err = -EINVAL;
788 goto out;
789 }
790
791 call = drv->ops->add_beacon;
792 break;
793 case NL80211_CMD_SET_BEACON:
794 call = drv->ops->set_beacon;
795 break;
796 default:
797 WARN_ON(1);
798 err = -EOPNOTSUPP;
799 goto out;
800 }
801
802 if (!call) {
803 err = -EOPNOTSUPP;
804 goto out;
805 }
806
807 memset(&params, 0, sizeof(params));
808
809 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
810 params.interval =
811 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
812 haveinfo = 1;
813 }
814
815 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
816 params.dtim_period =
817 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
818 haveinfo = 1;
819 }
820
821 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
822 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
823 params.head_len =
824 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
825 haveinfo = 1;
826 }
827
828 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
829 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
830 params.tail_len =
831 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
832 haveinfo = 1;
833 }
834
835 if (!haveinfo) {
836 err = -EINVAL;
837 goto out;
838 }
839
840 rtnl_lock();
841 err = call(&drv->wiphy, dev, &params);
842 rtnl_unlock();
843
844 out:
845 cfg80211_put_dev(drv);
846 dev_put(dev);
847 return err;
848 }
849
850 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
851 {
852 struct cfg80211_registered_device *drv;
853 int err;
854 struct net_device *dev;
855
856 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
857 if (err)
858 return err;
859
860 if (!drv->ops->del_beacon) {
861 err = -EOPNOTSUPP;
862 goto out;
863 }
864
865 rtnl_lock();
866 err = drv->ops->del_beacon(&drv->wiphy, dev);
867 rtnl_unlock();
868
869 out:
870 cfg80211_put_dev(drv);
871 dev_put(dev);
872 return err;
873 }
874
875 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
876 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
877 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
878 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
879 };
880
881 static int parse_station_flags(struct nlattr *nla, u32 *staflags)
882 {
883 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
884 int flag;
885
886 *staflags = 0;
887
888 if (!nla)
889 return 0;
890
891 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
892 nla, sta_flags_policy))
893 return -EINVAL;
894
895 *staflags = STATION_FLAG_CHANGED;
896
897 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
898 if (flags[flag])
899 *staflags |= (1<<flag);
900
901 return 0;
902 }
903
904 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
905 int flags, struct net_device *dev,
906 u8 *mac_addr, struct station_info *sinfo)
907 {
908 void *hdr;
909 struct nlattr *sinfoattr;
910
911 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
912 if (!hdr)
913 return -1;
914
915 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
916 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
917
918 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
919 if (!sinfoattr)
920 goto nla_put_failure;
921 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
922 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
923 sinfo->inactive_time);
924 if (sinfo->filled & STATION_INFO_RX_BYTES)
925 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
926 sinfo->rx_bytes);
927 if (sinfo->filled & STATION_INFO_TX_BYTES)
928 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
929 sinfo->tx_bytes);
930 if (sinfo->filled & STATION_INFO_LLID)
931 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
932 sinfo->llid);
933 if (sinfo->filled & STATION_INFO_PLID)
934 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
935 sinfo->plid);
936 if (sinfo->filled & STATION_INFO_PLINK_STATE)
937 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
938 sinfo->plink_state);
939
940 nla_nest_end(msg, sinfoattr);
941
942 return genlmsg_end(msg, hdr);
943
944 nla_put_failure:
945 genlmsg_cancel(msg, hdr);
946 return -EMSGSIZE;
947 }
948
949 static int nl80211_dump_station(struct sk_buff *skb,
950 struct netlink_callback *cb)
951 {
952 struct station_info sinfo;
953 struct cfg80211_registered_device *dev;
954 struct net_device *netdev;
955 u8 mac_addr[ETH_ALEN];
956 int ifidx = cb->args[0];
957 int sta_idx = cb->args[1];
958 int err;
959
960 if (!ifidx) {
961 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
962 nl80211_fam.attrbuf, nl80211_fam.maxattr,
963 nl80211_policy);
964 if (err)
965 return err;
966
967 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
968 return -EINVAL;
969
970 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
971 if (!ifidx)
972 return -EINVAL;
973 }
974
975 netdev = dev_get_by_index(&init_net, ifidx);
976 if (!netdev)
977 return -ENODEV;
978
979 dev = cfg80211_get_dev_from_ifindex(ifidx);
980 if (IS_ERR(dev)) {
981 err = PTR_ERR(dev);
982 goto out_put_netdev;
983 }
984
985 if (!dev->ops->dump_station) {
986 err = -ENOSYS;
987 goto out_err;
988 }
989
990 rtnl_lock();
991
992 while (1) {
993 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
994 mac_addr, &sinfo);
995 if (err == -ENOENT)
996 break;
997 if (err)
998 goto out_err_rtnl;
999
1000 if (nl80211_send_station(skb,
1001 NETLINK_CB(cb->skb).pid,
1002 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1003 netdev, mac_addr,
1004 &sinfo) < 0)
1005 goto out;
1006
1007 sta_idx++;
1008 }
1009
1010
1011 out:
1012 cb->args[1] = sta_idx;
1013 err = skb->len;
1014 out_err_rtnl:
1015 rtnl_unlock();
1016 out_err:
1017 cfg80211_put_dev(dev);
1018 out_put_netdev:
1019 dev_put(netdev);
1020
1021 return err;
1022 }
1023
1024 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1025 {
1026 struct cfg80211_registered_device *drv;
1027 int err;
1028 struct net_device *dev;
1029 struct station_info sinfo;
1030 struct sk_buff *msg;
1031 u8 *mac_addr = NULL;
1032
1033 memset(&sinfo, 0, sizeof(sinfo));
1034
1035 if (!info->attrs[NL80211_ATTR_MAC])
1036 return -EINVAL;
1037
1038 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1039
1040 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1041 if (err)
1042 return err;
1043
1044 if (!drv->ops->get_station) {
1045 err = -EOPNOTSUPP;
1046 goto out;
1047 }
1048
1049 rtnl_lock();
1050 err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1051 rtnl_unlock();
1052
1053 if (err)
1054 goto out;
1055
1056 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1057 if (!msg)
1058 goto out;
1059
1060 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1061 dev, mac_addr, &sinfo) < 0)
1062 goto out_free;
1063
1064 err = genlmsg_unicast(msg, info->snd_pid);
1065 goto out;
1066
1067 out_free:
1068 nlmsg_free(msg);
1069
1070 out:
1071 cfg80211_put_dev(drv);
1072 dev_put(dev);
1073 return err;
1074 }
1075
1076 /*
1077 * Get vlan interface making sure it is on the right wiphy.
1078 */
1079 static int get_vlan(struct nlattr *vlanattr,
1080 struct cfg80211_registered_device *rdev,
1081 struct net_device **vlan)
1082 {
1083 *vlan = NULL;
1084
1085 if (vlanattr) {
1086 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1087 if (!*vlan)
1088 return -ENODEV;
1089 if (!(*vlan)->ieee80211_ptr)
1090 return -EINVAL;
1091 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1092 return -EINVAL;
1093 }
1094 return 0;
1095 }
1096
1097 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1098 {
1099 struct cfg80211_registered_device *drv;
1100 int err;
1101 struct net_device *dev;
1102 struct station_parameters params;
1103 u8 *mac_addr = NULL;
1104
1105 memset(&params, 0, sizeof(params));
1106
1107 params.listen_interval = -1;
1108
1109 if (info->attrs[NL80211_ATTR_STA_AID])
1110 return -EINVAL;
1111
1112 if (!info->attrs[NL80211_ATTR_MAC])
1113 return -EINVAL;
1114
1115 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1116
1117 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1118 params.supported_rates =
1119 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1120 params.supported_rates_len =
1121 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1122 }
1123
1124 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1125 params.listen_interval =
1126 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1127
1128 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1129 &params.station_flags))
1130 return -EINVAL;
1131
1132 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1133 params.plink_action =
1134 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1135
1136 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1137 if (err)
1138 return err;
1139
1140 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1141 if (err)
1142 goto out;
1143
1144 if (!drv->ops->change_station) {
1145 err = -EOPNOTSUPP;
1146 goto out;
1147 }
1148
1149 rtnl_lock();
1150 err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1151 rtnl_unlock();
1152
1153 out:
1154 if (params.vlan)
1155 dev_put(params.vlan);
1156 cfg80211_put_dev(drv);
1157 dev_put(dev);
1158 return err;
1159 }
1160
1161 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1162 {
1163 struct cfg80211_registered_device *drv;
1164 int err;
1165 struct net_device *dev;
1166 struct station_parameters params;
1167 u8 *mac_addr = NULL;
1168
1169 memset(&params, 0, sizeof(params));
1170
1171 if (!info->attrs[NL80211_ATTR_MAC])
1172 return -EINVAL;
1173
1174 if (!info->attrs[NL80211_ATTR_STA_AID])
1175 return -EINVAL;
1176
1177 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1178 return -EINVAL;
1179
1180 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1181 return -EINVAL;
1182
1183 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1184 params.supported_rates =
1185 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1186 params.supported_rates_len =
1187 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1188 params.listen_interval =
1189 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1190 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1191
1192 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1193 &params.station_flags))
1194 return -EINVAL;
1195
1196 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1197 if (err)
1198 return err;
1199
1200 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1201 if (err)
1202 goto out;
1203
1204 if (!drv->ops->add_station) {
1205 err = -EOPNOTSUPP;
1206 goto out;
1207 }
1208
1209 rtnl_lock();
1210 err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1211 rtnl_unlock();
1212
1213 out:
1214 if (params.vlan)
1215 dev_put(params.vlan);
1216 cfg80211_put_dev(drv);
1217 dev_put(dev);
1218 return err;
1219 }
1220
1221 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1222 {
1223 struct cfg80211_registered_device *drv;
1224 int err;
1225 struct net_device *dev;
1226 u8 *mac_addr = NULL;
1227
1228 if (info->attrs[NL80211_ATTR_MAC])
1229 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1230
1231 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1232 if (err)
1233 return err;
1234
1235 if (!drv->ops->del_station) {
1236 err = -EOPNOTSUPP;
1237 goto out;
1238 }
1239
1240 rtnl_lock();
1241 err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1242 rtnl_unlock();
1243
1244 out:
1245 cfg80211_put_dev(drv);
1246 dev_put(dev);
1247 return err;
1248 }
1249
1250 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1251 int flags, struct net_device *dev,
1252 u8 *dst, u8 *next_hop,
1253 struct mpath_info *pinfo)
1254 {
1255 void *hdr;
1256 struct nlattr *pinfoattr;
1257
1258 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1259 if (!hdr)
1260 return -1;
1261
1262 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1263 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1264 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1265
1266 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1267 if (!pinfoattr)
1268 goto nla_put_failure;
1269 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1270 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1271 pinfo->frame_qlen);
1272 if (pinfo->filled & MPATH_INFO_DSN)
1273 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1274 pinfo->dsn);
1275 if (pinfo->filled & MPATH_INFO_METRIC)
1276 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1277 pinfo->metric);
1278 if (pinfo->filled & MPATH_INFO_EXPTIME)
1279 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1280 pinfo->exptime);
1281 if (pinfo->filled & MPATH_INFO_FLAGS)
1282 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1283 pinfo->flags);
1284 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1285 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1286 pinfo->discovery_timeout);
1287 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1288 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1289 pinfo->discovery_retries);
1290
1291 nla_nest_end(msg, pinfoattr);
1292
1293 return genlmsg_end(msg, hdr);
1294
1295 nla_put_failure:
1296 genlmsg_cancel(msg, hdr);
1297 return -EMSGSIZE;
1298 }
1299
1300 static int nl80211_dump_mpath(struct sk_buff *skb,
1301 struct netlink_callback *cb)
1302 {
1303 struct mpath_info pinfo;
1304 struct cfg80211_registered_device *dev;
1305 struct net_device *netdev;
1306 u8 dst[ETH_ALEN];
1307 u8 next_hop[ETH_ALEN];
1308 int ifidx = cb->args[0];
1309 int path_idx = cb->args[1];
1310 int err;
1311
1312 if (!ifidx) {
1313 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1314 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1315 nl80211_policy);
1316 if (err)
1317 return err;
1318
1319 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1320 return -EINVAL;
1321
1322 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1323 if (!ifidx)
1324 return -EINVAL;
1325 }
1326
1327 netdev = dev_get_by_index(&init_net, ifidx);
1328 if (!netdev)
1329 return -ENODEV;
1330
1331 dev = cfg80211_get_dev_from_ifindex(ifidx);
1332 if (IS_ERR(dev)) {
1333 err = PTR_ERR(dev);
1334 goto out_put_netdev;
1335 }
1336
1337 if (!dev->ops->dump_mpath) {
1338 err = -ENOSYS;
1339 goto out_err;
1340 }
1341
1342 rtnl_lock();
1343
1344 while (1) {
1345 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1346 dst, next_hop, &pinfo);
1347 if (err == -ENOENT)
1348 break;
1349 if (err)
1350 goto out_err_rtnl;
1351
1352 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1353 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1354 netdev, dst, next_hop,
1355 &pinfo) < 0)
1356 goto out;
1357
1358 path_idx++;
1359 }
1360
1361
1362 out:
1363 cb->args[1] = path_idx;
1364 err = skb->len;
1365 out_err_rtnl:
1366 rtnl_unlock();
1367 out_err:
1368 cfg80211_put_dev(dev);
1369 out_put_netdev:
1370 dev_put(netdev);
1371
1372 return err;
1373 }
1374
1375 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1376 {
1377 struct cfg80211_registered_device *drv;
1378 int err;
1379 struct net_device *dev;
1380 struct mpath_info pinfo;
1381 struct sk_buff *msg;
1382 u8 *dst = NULL;
1383 u8 next_hop[ETH_ALEN];
1384
1385 memset(&pinfo, 0, sizeof(pinfo));
1386
1387 if (!info->attrs[NL80211_ATTR_MAC])
1388 return -EINVAL;
1389
1390 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1391
1392 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1393 if (err)
1394 return err;
1395
1396 if (!drv->ops->get_mpath) {
1397 err = -EOPNOTSUPP;
1398 goto out;
1399 }
1400
1401 rtnl_lock();
1402 err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1403 rtnl_unlock();
1404
1405 if (err)
1406 goto out;
1407
1408 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1409 if (!msg)
1410 goto out;
1411
1412 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1413 dev, dst, next_hop, &pinfo) < 0)
1414 goto out_free;
1415
1416 err = genlmsg_unicast(msg, info->snd_pid);
1417 goto out;
1418
1419 out_free:
1420 nlmsg_free(msg);
1421
1422 out:
1423 cfg80211_put_dev(drv);
1424 dev_put(dev);
1425 return err;
1426 }
1427
1428 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
1429 {
1430 struct cfg80211_registered_device *drv;
1431 int err;
1432 struct net_device *dev;
1433 u8 *dst = NULL;
1434 u8 *next_hop = NULL;
1435
1436 if (!info->attrs[NL80211_ATTR_MAC])
1437 return -EINVAL;
1438
1439 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1440 return -EINVAL;
1441
1442 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1443 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1444
1445 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1446 if (err)
1447 return err;
1448
1449 if (!drv->ops->change_mpath) {
1450 err = -EOPNOTSUPP;
1451 goto out;
1452 }
1453
1454 rtnl_lock();
1455 err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
1456 rtnl_unlock();
1457
1458 out:
1459 cfg80211_put_dev(drv);
1460 dev_put(dev);
1461 return err;
1462 }
1463 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
1464 {
1465 struct cfg80211_registered_device *drv;
1466 int err;
1467 struct net_device *dev;
1468 u8 *dst = NULL;
1469 u8 *next_hop = NULL;
1470
1471 if (!info->attrs[NL80211_ATTR_MAC])
1472 return -EINVAL;
1473
1474 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1475 return -EINVAL;
1476
1477 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1478 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1479
1480 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1481 if (err)
1482 return err;
1483
1484 if (!drv->ops->add_mpath) {
1485 err = -EOPNOTSUPP;
1486 goto out;
1487 }
1488
1489 rtnl_lock();
1490 err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
1491 rtnl_unlock();
1492
1493 out:
1494 cfg80211_put_dev(drv);
1495 dev_put(dev);
1496 return err;
1497 }
1498
1499 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
1500 {
1501 struct cfg80211_registered_device *drv;
1502 int err;
1503 struct net_device *dev;
1504 u8 *dst = NULL;
1505
1506 if (info->attrs[NL80211_ATTR_MAC])
1507 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1508
1509 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1510 if (err)
1511 return err;
1512
1513 if (!drv->ops->del_mpath) {
1514 err = -EOPNOTSUPP;
1515 goto out;
1516 }
1517
1518 rtnl_lock();
1519 err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
1520 rtnl_unlock();
1521
1522 out:
1523 cfg80211_put_dev(drv);
1524 dev_put(dev);
1525 return err;
1526 }
1527
1528 static struct genl_ops nl80211_ops[] = {
1529 {
1530 .cmd = NL80211_CMD_GET_WIPHY,
1531 .doit = nl80211_get_wiphy,
1532 .dumpit = nl80211_dump_wiphy,
1533 .policy = nl80211_policy,
1534 /* can be retrieved by unprivileged users */
1535 },
1536 {
1537 .cmd = NL80211_CMD_SET_WIPHY,
1538 .doit = nl80211_set_wiphy,
1539 .policy = nl80211_policy,
1540 .flags = GENL_ADMIN_PERM,
1541 },
1542 {
1543 .cmd = NL80211_CMD_GET_INTERFACE,
1544 .doit = nl80211_get_interface,
1545 .dumpit = nl80211_dump_interface,
1546 .policy = nl80211_policy,
1547 /* can be retrieved by unprivileged users */
1548 },
1549 {
1550 .cmd = NL80211_CMD_SET_INTERFACE,
1551 .doit = nl80211_set_interface,
1552 .policy = nl80211_policy,
1553 .flags = GENL_ADMIN_PERM,
1554 },
1555 {
1556 .cmd = NL80211_CMD_NEW_INTERFACE,
1557 .doit = nl80211_new_interface,
1558 .policy = nl80211_policy,
1559 .flags = GENL_ADMIN_PERM,
1560 },
1561 {
1562 .cmd = NL80211_CMD_DEL_INTERFACE,
1563 .doit = nl80211_del_interface,
1564 .policy = nl80211_policy,
1565 .flags = GENL_ADMIN_PERM,
1566 },
1567 {
1568 .cmd = NL80211_CMD_GET_KEY,
1569 .doit = nl80211_get_key,
1570 .policy = nl80211_policy,
1571 .flags = GENL_ADMIN_PERM,
1572 },
1573 {
1574 .cmd = NL80211_CMD_SET_KEY,
1575 .doit = nl80211_set_key,
1576 .policy = nl80211_policy,
1577 .flags = GENL_ADMIN_PERM,
1578 },
1579 {
1580 .cmd = NL80211_CMD_NEW_KEY,
1581 .doit = nl80211_new_key,
1582 .policy = nl80211_policy,
1583 .flags = GENL_ADMIN_PERM,
1584 },
1585 {
1586 .cmd = NL80211_CMD_DEL_KEY,
1587 .doit = nl80211_del_key,
1588 .policy = nl80211_policy,
1589 .flags = GENL_ADMIN_PERM,
1590 },
1591 {
1592 .cmd = NL80211_CMD_SET_BEACON,
1593 .policy = nl80211_policy,
1594 .flags = GENL_ADMIN_PERM,
1595 .doit = nl80211_addset_beacon,
1596 },
1597 {
1598 .cmd = NL80211_CMD_NEW_BEACON,
1599 .policy = nl80211_policy,
1600 .flags = GENL_ADMIN_PERM,
1601 .doit = nl80211_addset_beacon,
1602 },
1603 {
1604 .cmd = NL80211_CMD_DEL_BEACON,
1605 .policy = nl80211_policy,
1606 .flags = GENL_ADMIN_PERM,
1607 .doit = nl80211_del_beacon,
1608 },
1609 {
1610 .cmd = NL80211_CMD_GET_STATION,
1611 .doit = nl80211_get_station,
1612 .dumpit = nl80211_dump_station,
1613 .policy = nl80211_policy,
1614 .flags = GENL_ADMIN_PERM,
1615 },
1616 {
1617 .cmd = NL80211_CMD_SET_STATION,
1618 .doit = nl80211_set_station,
1619 .policy = nl80211_policy,
1620 .flags = GENL_ADMIN_PERM,
1621 },
1622 {
1623 .cmd = NL80211_CMD_NEW_STATION,
1624 .doit = nl80211_new_station,
1625 .policy = nl80211_policy,
1626 .flags = GENL_ADMIN_PERM,
1627 },
1628 {
1629 .cmd = NL80211_CMD_DEL_STATION,
1630 .doit = nl80211_del_station,
1631 .policy = nl80211_policy,
1632 .flags = GENL_ADMIN_PERM,
1633 },
1634 {
1635 .cmd = NL80211_CMD_GET_MPATH,
1636 .doit = nl80211_get_mpath,
1637 .dumpit = nl80211_dump_mpath,
1638 .policy = nl80211_policy,
1639 .flags = GENL_ADMIN_PERM,
1640 },
1641 {
1642 .cmd = NL80211_CMD_SET_MPATH,
1643 .doit = nl80211_set_mpath,
1644 .policy = nl80211_policy,
1645 .flags = GENL_ADMIN_PERM,
1646 },
1647 {
1648 .cmd = NL80211_CMD_NEW_MPATH,
1649 .doit = nl80211_new_mpath,
1650 .policy = nl80211_policy,
1651 .flags = GENL_ADMIN_PERM,
1652 },
1653 {
1654 .cmd = NL80211_CMD_DEL_MPATH,
1655 .doit = nl80211_del_mpath,
1656 .policy = nl80211_policy,
1657 .flags = GENL_ADMIN_PERM,
1658 },
1659 };
1660
1661 /* multicast groups */
1662 static struct genl_multicast_group nl80211_config_mcgrp = {
1663 .name = "config",
1664 };
1665
1666 /* notification functions */
1667
1668 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
1669 {
1670 struct sk_buff *msg;
1671
1672 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1673 if (!msg)
1674 return;
1675
1676 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
1677 nlmsg_free(msg);
1678 return;
1679 }
1680
1681 genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
1682 }
1683
1684 /* initialisation/exit functions */
1685
1686 int nl80211_init(void)
1687 {
1688 int err, i;
1689
1690 err = genl_register_family(&nl80211_fam);
1691 if (err)
1692 return err;
1693
1694 for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
1695 err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
1696 if (err)
1697 goto err_out;
1698 }
1699
1700 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
1701 if (err)
1702 goto err_out;
1703
1704 return 0;
1705 err_out:
1706 genl_unregister_family(&nl80211_fam);
1707 return err;
1708 }
1709
1710 void nl80211_exit(void)
1711 {
1712 genl_unregister_family(&nl80211_fam);
1713 }
Linux with added FPC-III support