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powerpc/32: Allow __ioremap on RAM addresses for kdump kernel
[linux-2.6/mini2440.git] / net / wireless / nl80211.c
blob572793c8c7ab6b576dae03753b69503ee05f04cf
1 /*
2 * This is the new netlink-based wireless configuration interface.
3 *
4 * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
5 */
6
7 #include <linux/if.h>
8 #include <linux/module.h>
9 #include <linux/err.h>
10 #include <linux/mutex.h>
11 #include <linux/list.h>
12 #include <linux/if_ether.h>
13 #include <linux/ieee80211.h>
14 #include <linux/nl80211.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/netlink.h>
17 #include <net/genetlink.h>
18 #include <net/cfg80211.h>
19 #include "core.h"
20 #include "nl80211.h"
21 #include "reg.h"
22
23 /* the netlink family */
24 static struct genl_family nl80211_fam = {
25 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
26 .name = "nl80211", /* have users key off the name instead */
27 .hdrsize = 0, /* no private header */
28 .version = 1, /* no particular meaning now */
29 .maxattr = NL80211_ATTR_MAX,
30 };
31
32 /* internal helper: get drv and dev */
33 static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
34 struct cfg80211_registered_device **drv,
35 struct net_device **dev)
36 {
37 int ifindex;
38
39 if (!attrs[NL80211_ATTR_IFINDEX])
40 return -EINVAL;
41
42 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
43 *dev = dev_get_by_index(&init_net, ifindex);
44 if (!*dev)
45 return -ENODEV;
46
47 *drv = cfg80211_get_dev_from_ifindex(ifindex);
48 if (IS_ERR(*drv)) {
49 dev_put(*dev);
50 return PTR_ERR(*drv);
51 }
52
53 return 0;
54 }
55
56 /* policy for the attributes */
57 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
58 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
59 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
60 .len = BUS_ID_SIZE-1 },
61
62 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
63 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
64 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
65
66 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
67
68 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
69 .len = WLAN_MAX_KEY_LEN },
70 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
71 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
72 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
73
74 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
75 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
76 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
77 .len = IEEE80211_MAX_DATA_LEN },
78 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
79 .len = IEEE80211_MAX_DATA_LEN },
80 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
81 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
82 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
83 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
84 .len = NL80211_MAX_SUPP_RATES },
85 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
86 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
87 [NL80211_ATTR_MNTR_FLAGS] = { .type = NLA_NESTED },
88 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
89 .len = IEEE80211_MAX_MESH_ID_LEN },
90 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
91
92 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
93 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
94
95 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
96 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
97 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
98
99 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
100 .len = NL80211_HT_CAPABILITY_LEN },
101 };
102
103 /* message building helper */
104 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
105 int flags, u8 cmd)
106 {
107 /* since there is no private header just add the generic one */
108 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
109 }
110
111 /* netlink command implementations */
112
113 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
114 struct cfg80211_registered_device *dev)
115 {
116 void *hdr;
117 struct nlattr *nl_bands, *nl_band;
118 struct nlattr *nl_freqs, *nl_freq;
119 struct nlattr *nl_rates, *nl_rate;
120 struct nlattr *nl_modes;
121 enum ieee80211_band band;
122 struct ieee80211_channel *chan;
123 struct ieee80211_rate *rate;
124 int i;
125 u16 ifmodes = dev->wiphy.interface_modes;
126
127 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
128 if (!hdr)
129 return -1;
130
131 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx);
132 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
133
134 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
135 if (!nl_modes)
136 goto nla_put_failure;
137
138 i = 0;
139 while (ifmodes) {
140 if (ifmodes & 1)
141 NLA_PUT_FLAG(msg, i);
142 ifmodes >>= 1;
143 i++;
144 }
145
146 nla_nest_end(msg, nl_modes);
147
148 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
149 if (!nl_bands)
150 goto nla_put_failure;
151
152 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
153 if (!dev->wiphy.bands[band])
154 continue;
155
156 nl_band = nla_nest_start(msg, band);
157 if (!nl_band)
158 goto nla_put_failure;
159
160 /* add frequencies */
161 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
162 if (!nl_freqs)
163 goto nla_put_failure;
164
165 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
166 nl_freq = nla_nest_start(msg, i);
167 if (!nl_freq)
168 goto nla_put_failure;
169
170 chan = &dev->wiphy.bands[band]->channels[i];
171 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
172 chan->center_freq);
173
174 if (chan->flags & IEEE80211_CHAN_DISABLED)
175 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
176 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
177 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
178 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
179 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
180 if (chan->flags & IEEE80211_CHAN_RADAR)
181 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
182
183 nla_nest_end(msg, nl_freq);
184 }
185
186 nla_nest_end(msg, nl_freqs);
187
188 /* add bitrates */
189 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
190 if (!nl_rates)
191 goto nla_put_failure;
192
193 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
194 nl_rate = nla_nest_start(msg, i);
195 if (!nl_rate)
196 goto nla_put_failure;
197
198 rate = &dev->wiphy.bands[band]->bitrates[i];
199 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
200 rate->bitrate);
201 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
202 NLA_PUT_FLAG(msg,
203 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
204
205 nla_nest_end(msg, nl_rate);
206 }
207
208 nla_nest_end(msg, nl_rates);
209
210 nla_nest_end(msg, nl_band);
211 }
212 nla_nest_end(msg, nl_bands);
213
214 return genlmsg_end(msg, hdr);
215
216 nla_put_failure:
217 genlmsg_cancel(msg, hdr);
218 return -EMSGSIZE;
219 }
220
221 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
222 {
223 int idx = 0;
224 int start = cb->args[0];
225 struct cfg80211_registered_device *dev;
226
227 mutex_lock(&cfg80211_drv_mutex);
228 list_for_each_entry(dev, &cfg80211_drv_list, list) {
229 if (++idx <= start)
230 continue;
231 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
232 cb->nlh->nlmsg_seq, NLM_F_MULTI,
233 dev) < 0) {
234 idx--;
235 break;
236 }
237 }
238 mutex_unlock(&cfg80211_drv_mutex);
239
240 cb->args[0] = idx;
241
242 return skb->len;
243 }
244
245 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
246 {
247 struct sk_buff *msg;
248 struct cfg80211_registered_device *dev;
249
250 dev = cfg80211_get_dev_from_info(info);
251 if (IS_ERR(dev))
252 return PTR_ERR(dev);
253
254 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
255 if (!msg)
256 goto out_err;
257
258 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
259 goto out_free;
260
261 cfg80211_put_dev(dev);
262
263 return genlmsg_unicast(msg, info->snd_pid);
264
265 out_free:
266 nlmsg_free(msg);
267 out_err:
268 cfg80211_put_dev(dev);
269 return -ENOBUFS;
270 }
271
272 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
273 {
274 struct cfg80211_registered_device *rdev;
275 int result;
276
277 if (!info->attrs[NL80211_ATTR_WIPHY_NAME])
278 return -EINVAL;
279
280 rdev = cfg80211_get_dev_from_info(info);
281 if (IS_ERR(rdev))
282 return PTR_ERR(rdev);
283
284 result = cfg80211_dev_rename(rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
285
286 cfg80211_put_dev(rdev);
287 return result;
288 }
289
290
291 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
292 struct net_device *dev)
293 {
294 void *hdr;
295
296 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
297 if (!hdr)
298 return -1;
299
300 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
301 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
302 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
303 return genlmsg_end(msg, hdr);
304
305 nla_put_failure:
306 genlmsg_cancel(msg, hdr);
307 return -EMSGSIZE;
308 }
309
310 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
311 {
312 int wp_idx = 0;
313 int if_idx = 0;
314 int wp_start = cb->args[0];
315 int if_start = cb->args[1];
316 struct cfg80211_registered_device *dev;
317 struct wireless_dev *wdev;
318
319 mutex_lock(&cfg80211_drv_mutex);
320 list_for_each_entry(dev, &cfg80211_drv_list, list) {
321 if (wp_idx < wp_start) {
322 wp_idx++;
323 continue;
324 }
325 if_idx = 0;
326
327 mutex_lock(&dev->devlist_mtx);
328 list_for_each_entry(wdev, &dev->netdev_list, list) {
329 if (if_idx < if_start) {
330 if_idx++;
331 continue;
332 }
333 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
334 cb->nlh->nlmsg_seq, NLM_F_MULTI,
335 wdev->netdev) < 0) {
336 mutex_unlock(&dev->devlist_mtx);
337 goto out;
338 }
339 if_idx++;
340 }
341 mutex_unlock(&dev->devlist_mtx);
342
343 wp_idx++;
344 }
345 out:
346 mutex_unlock(&cfg80211_drv_mutex);
347
348 cb->args[0] = wp_idx;
349 cb->args[1] = if_idx;
350
351 return skb->len;
352 }
353
354 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
355 {
356 struct sk_buff *msg;
357 struct cfg80211_registered_device *dev;
358 struct net_device *netdev;
359 int err;
360
361 err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
362 if (err)
363 return err;
364
365 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
366 if (!msg)
367 goto out_err;
368
369 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
370 goto out_free;
371
372 dev_put(netdev);
373 cfg80211_put_dev(dev);
374
375 return genlmsg_unicast(msg, info->snd_pid);
376
377 out_free:
378 nlmsg_free(msg);
379 out_err:
380 dev_put(netdev);
381 cfg80211_put_dev(dev);
382 return -ENOBUFS;
383 }
384
385 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
386 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
387 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
388 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
389 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
390 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
391 };
392
393 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
394 {
395 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
396 int flag;
397
398 *mntrflags = 0;
399
400 if (!nla)
401 return -EINVAL;
402
403 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
404 nla, mntr_flags_policy))
405 return -EINVAL;
406
407 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
408 if (flags[flag])
409 *mntrflags |= (1<<flag);
410
411 return 0;
412 }
413
414 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
415 {
416 struct cfg80211_registered_device *drv;
417 struct vif_params params;
418 int err, ifindex;
419 enum nl80211_iftype type;
420 struct net_device *dev;
421 u32 _flags, *flags = NULL;
422
423 memset(&params, 0, sizeof(params));
424
425 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
426 if (err)
427 return err;
428 ifindex = dev->ifindex;
429 type = dev->ieee80211_ptr->iftype;
430 dev_put(dev);
431
432 err = -EINVAL;
433 if (info->attrs[NL80211_ATTR_IFTYPE]) {
434 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
435 if (type > NL80211_IFTYPE_MAX)
436 goto unlock;
437 }
438
439 if (!drv->ops->change_virtual_intf ||
440 !(drv->wiphy.interface_modes & (1 << type))) {
441 err = -EOPNOTSUPP;
442 goto unlock;
443 }
444
445 if (info->attrs[NL80211_ATTR_MESH_ID]) {
446 if (type != NL80211_IFTYPE_MESH_POINT) {
447 err = -EINVAL;
448 goto unlock;
449 }
450 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
451 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
452 }
453
454 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
455 if (type != NL80211_IFTYPE_MONITOR) {
456 err = -EINVAL;
457 goto unlock;
458 }
459 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
460 &_flags);
461 if (!err)
462 flags = &_flags;
463 }
464 rtnl_lock();
465 err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
466 type, flags, &params);
467
468 dev = __dev_get_by_index(&init_net, ifindex);
469 WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));
470
471 rtnl_unlock();
472
473 unlock:
474 cfg80211_put_dev(drv);
475 return err;
476 }
477
478 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
479 {
480 struct cfg80211_registered_device *drv;
481 struct vif_params params;
482 int err;
483 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
484 u32 flags;
485
486 memset(&params, 0, sizeof(params));
487
488 if (!info->attrs[NL80211_ATTR_IFNAME])
489 return -EINVAL;
490
491 if (info->attrs[NL80211_ATTR_IFTYPE]) {
492 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
493 if (type > NL80211_IFTYPE_MAX)
494 return -EINVAL;
495 }
496
497 drv = cfg80211_get_dev_from_info(info);
498 if (IS_ERR(drv))
499 return PTR_ERR(drv);
500
501 if (!drv->ops->add_virtual_intf ||
502 !(drv->wiphy.interface_modes & (1 << type))) {
503 err = -EOPNOTSUPP;
504 goto unlock;
505 }
506
507 if (type == NL80211_IFTYPE_MESH_POINT &&
508 info->attrs[NL80211_ATTR_MESH_ID]) {
509 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
510 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
511 }
512
513 rtnl_lock();
514 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
515 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
516 &flags);
517 err = drv->ops->add_virtual_intf(&drv->wiphy,
518 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
519 type, err ? NULL : &flags, &params);
520 rtnl_unlock();
521
522
523 unlock:
524 cfg80211_put_dev(drv);
525 return err;
526 }
527
528 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
529 {
530 struct cfg80211_registered_device *drv;
531 int ifindex, err;
532 struct net_device *dev;
533
534 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
535 if (err)
536 return err;
537 ifindex = dev->ifindex;
538 dev_put(dev);
539
540 if (!drv->ops->del_virtual_intf) {
541 err = -EOPNOTSUPP;
542 goto out;
543 }
544
545 rtnl_lock();
546 err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
547 rtnl_unlock();
548
549 out:
550 cfg80211_put_dev(drv);
551 return err;
552 }
553
554 struct get_key_cookie {
555 struct sk_buff *msg;
556 int error;
557 };
558
559 static void get_key_callback(void *c, struct key_params *params)
560 {
561 struct get_key_cookie *cookie = c;
562
563 if (params->key)
564 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
565 params->key_len, params->key);
566
567 if (params->seq)
568 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
569 params->seq_len, params->seq);
570
571 if (params->cipher)
572 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
573 params->cipher);
574
575 return;
576 nla_put_failure:
577 cookie->error = 1;
578 }
579
580 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
581 {
582 struct cfg80211_registered_device *drv;
583 int err;
584 struct net_device *dev;
585 u8 key_idx = 0;
586 u8 *mac_addr = NULL;
587 struct get_key_cookie cookie = {
588 .error = 0,
589 };
590 void *hdr;
591 struct sk_buff *msg;
592
593 if (info->attrs[NL80211_ATTR_KEY_IDX])
594 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
595
596 if (key_idx > 3)
597 return -EINVAL;
598
599 if (info->attrs[NL80211_ATTR_MAC])
600 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
601
602 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
603 if (err)
604 return err;
605
606 if (!drv->ops->get_key) {
607 err = -EOPNOTSUPP;
608 goto out;
609 }
610
611 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
612 if (!msg) {
613 err = -ENOMEM;
614 goto out;
615 }
616
617 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
618 NL80211_CMD_NEW_KEY);
619
620 if (IS_ERR(hdr)) {
621 err = PTR_ERR(hdr);
622 goto out;
623 }
624
625 cookie.msg = msg;
626
627 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
628 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
629 if (mac_addr)
630 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
631
632 rtnl_lock();
633 err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
634 &cookie, get_key_callback);
635 rtnl_unlock();
636
637 if (err)
638 goto out;
639
640 if (cookie.error)
641 goto nla_put_failure;
642
643 genlmsg_end(msg, hdr);
644 err = genlmsg_unicast(msg, info->snd_pid);
645 goto out;
646
647 nla_put_failure:
648 err = -ENOBUFS;
649 nlmsg_free(msg);
650 out:
651 cfg80211_put_dev(drv);
652 dev_put(dev);
653 return err;
654 }
655
656 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
657 {
658 struct cfg80211_registered_device *drv;
659 int err;
660 struct net_device *dev;
661 u8 key_idx;
662
663 if (!info->attrs[NL80211_ATTR_KEY_IDX])
664 return -EINVAL;
665
666 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
667
668 if (key_idx > 3)
669 return -EINVAL;
670
671 /* currently only support setting default key */
672 if (!info->attrs[NL80211_ATTR_KEY_DEFAULT])
673 return -EINVAL;
674
675 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
676 if (err)
677 return err;
678
679 if (!drv->ops->set_default_key) {
680 err = -EOPNOTSUPP;
681 goto out;
682 }
683
684 rtnl_lock();
685 err = drv->ops->set_default_key(&drv->wiphy, dev, key_idx);
686 rtnl_unlock();
687
688 out:
689 cfg80211_put_dev(drv);
690 dev_put(dev);
691 return err;
692 }
693
694 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
695 {
696 struct cfg80211_registered_device *drv;
697 int err;
698 struct net_device *dev;
699 struct key_params params;
700 u8 key_idx = 0;
701 u8 *mac_addr = NULL;
702
703 memset(&params, 0, sizeof(params));
704
705 if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
706 return -EINVAL;
707
708 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
709 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
710 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
711 }
712
713 if (info->attrs[NL80211_ATTR_KEY_IDX])
714 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
715
716 params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
717
718 if (info->attrs[NL80211_ATTR_MAC])
719 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
720
721 if (key_idx > 3)
722 return -EINVAL;
723
724 /*
725 * Disallow pairwise keys with non-zero index unless it's WEP
726 * (because current deployments use pairwise WEP keys with
727 * non-zero indizes but 802.11i clearly specifies to use zero)
728 */
729 if (mac_addr && key_idx &&
730 params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
731 params.cipher != WLAN_CIPHER_SUITE_WEP104)
732 return -EINVAL;
733
734 /* TODO: add definitions for the lengths to linux/ieee80211.h */
735 switch (params.cipher) {
736 case WLAN_CIPHER_SUITE_WEP40:
737 if (params.key_len != 5)
738 return -EINVAL;
739 break;
740 case WLAN_CIPHER_SUITE_TKIP:
741 if (params.key_len != 32)
742 return -EINVAL;
743 break;
744 case WLAN_CIPHER_SUITE_CCMP:
745 if (params.key_len != 16)
746 return -EINVAL;
747 break;
748 case WLAN_CIPHER_SUITE_WEP104:
749 if (params.key_len != 13)
750 return -EINVAL;
751 break;
752 default:
753 return -EINVAL;
754 }
755
756 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
757 if (err)
758 return err;
759
760 if (!drv->ops->add_key) {
761 err = -EOPNOTSUPP;
762 goto out;
763 }
764
765 rtnl_lock();
766 err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
767 rtnl_unlock();
768
769 out:
770 cfg80211_put_dev(drv);
771 dev_put(dev);
772 return err;
773 }
774
775 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
776 {
777 struct cfg80211_registered_device *drv;
778 int err;
779 struct net_device *dev;
780 u8 key_idx = 0;
781 u8 *mac_addr = NULL;
782
783 if (info->attrs[NL80211_ATTR_KEY_IDX])
784 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
785
786 if (key_idx > 3)
787 return -EINVAL;
788
789 if (info->attrs[NL80211_ATTR_MAC])
790 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
791
792 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
793 if (err)
794 return err;
795
796 if (!drv->ops->del_key) {
797 err = -EOPNOTSUPP;
798 goto out;
799 }
800
801 rtnl_lock();
802 err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
803 rtnl_unlock();
804
805 out:
806 cfg80211_put_dev(drv);
807 dev_put(dev);
808 return err;
809 }
810
811 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
812 {
813 int (*call)(struct wiphy *wiphy, struct net_device *dev,
814 struct beacon_parameters *info);
815 struct cfg80211_registered_device *drv;
816 int err;
817 struct net_device *dev;
818 struct beacon_parameters params;
819 int haveinfo = 0;
820
821 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
822 if (err)
823 return err;
824
825 switch (info->genlhdr->cmd) {
826 case NL80211_CMD_NEW_BEACON:
827 /* these are required for NEW_BEACON */
828 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
829 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
830 !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
831 err = -EINVAL;
832 goto out;
833 }
834
835 call = drv->ops->add_beacon;
836 break;
837 case NL80211_CMD_SET_BEACON:
838 call = drv->ops->set_beacon;
839 break;
840 default:
841 WARN_ON(1);
842 err = -EOPNOTSUPP;
843 goto out;
844 }
845
846 if (!call) {
847 err = -EOPNOTSUPP;
848 goto out;
849 }
850
851 memset(&params, 0, sizeof(params));
852
853 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
854 params.interval =
855 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
856 haveinfo = 1;
857 }
858
859 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
860 params.dtim_period =
861 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
862 haveinfo = 1;
863 }
864
865 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
866 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
867 params.head_len =
868 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
869 haveinfo = 1;
870 }
871
872 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
873 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
874 params.tail_len =
875 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
876 haveinfo = 1;
877 }
878
879 if (!haveinfo) {
880 err = -EINVAL;
881 goto out;
882 }
883
884 rtnl_lock();
885 err = call(&drv->wiphy, dev, &params);
886 rtnl_unlock();
887
888 out:
889 cfg80211_put_dev(drv);
890 dev_put(dev);
891 return err;
892 }
893
894 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
895 {
896 struct cfg80211_registered_device *drv;
897 int err;
898 struct net_device *dev;
899
900 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
901 if (err)
902 return err;
903
904 if (!drv->ops->del_beacon) {
905 err = -EOPNOTSUPP;
906 goto out;
907 }
908
909 rtnl_lock();
910 err = drv->ops->del_beacon(&drv->wiphy, dev);
911 rtnl_unlock();
912
913 out:
914 cfg80211_put_dev(drv);
915 dev_put(dev);
916 return err;
917 }
918
919 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
920 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
921 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
922 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
923 };
924
925 static int parse_station_flags(struct nlattr *nla, u32 *staflags)
926 {
927 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
928 int flag;
929
930 *staflags = 0;
931
932 if (!nla)
933 return 0;
934
935 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
936 nla, sta_flags_policy))
937 return -EINVAL;
938
939 *staflags = STATION_FLAG_CHANGED;
940
941 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
942 if (flags[flag])
943 *staflags |= (1<<flag);
944
945 return 0;
946 }
947
948 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
949 int flags, struct net_device *dev,
950 u8 *mac_addr, struct station_info *sinfo)
951 {
952 void *hdr;
953 struct nlattr *sinfoattr;
954
955 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
956 if (!hdr)
957 return -1;
958
959 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
960 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
961
962 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
963 if (!sinfoattr)
964 goto nla_put_failure;
965 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
966 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
967 sinfo->inactive_time);
968 if (sinfo->filled & STATION_INFO_RX_BYTES)
969 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
970 sinfo->rx_bytes);
971 if (sinfo->filled & STATION_INFO_TX_BYTES)
972 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
973 sinfo->tx_bytes);
974 if (sinfo->filled & STATION_INFO_LLID)
975 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
976 sinfo->llid);
977 if (sinfo->filled & STATION_INFO_PLID)
978 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
979 sinfo->plid);
980 if (sinfo->filled & STATION_INFO_PLINK_STATE)
981 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
982 sinfo->plink_state);
983
984 nla_nest_end(msg, sinfoattr);
985
986 return genlmsg_end(msg, hdr);
987
988 nla_put_failure:
989 genlmsg_cancel(msg, hdr);
990 return -EMSGSIZE;
991 }
992
993 static int nl80211_dump_station(struct sk_buff *skb,
994 struct netlink_callback *cb)
995 {
996 struct station_info sinfo;
997 struct cfg80211_registered_device *dev;
998 struct net_device *netdev;
999 u8 mac_addr[ETH_ALEN];
1000 int ifidx = cb->args[0];
1001 int sta_idx = cb->args[1];
1002 int err;
1003
1004 if (!ifidx) {
1005 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1006 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1007 nl80211_policy);
1008 if (err)
1009 return err;
1010
1011 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1012 return -EINVAL;
1013
1014 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1015 if (!ifidx)
1016 return -EINVAL;
1017 }
1018
1019 netdev = dev_get_by_index(&init_net, ifidx);
1020 if (!netdev)
1021 return -ENODEV;
1022
1023 dev = cfg80211_get_dev_from_ifindex(ifidx);
1024 if (IS_ERR(dev)) {
1025 err = PTR_ERR(dev);
1026 goto out_put_netdev;
1027 }
1028
1029 if (!dev->ops->dump_station) {
1030 err = -ENOSYS;
1031 goto out_err;
1032 }
1033
1034 rtnl_lock();
1035
1036 while (1) {
1037 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1038 mac_addr, &sinfo);
1039 if (err == -ENOENT)
1040 break;
1041 if (err)
1042 goto out_err_rtnl;
1043
1044 if (nl80211_send_station(skb,
1045 NETLINK_CB(cb->skb).pid,
1046 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1047 netdev, mac_addr,
1048 &sinfo) < 0)
1049 goto out;
1050
1051 sta_idx++;
1052 }
1053
1054
1055 out:
1056 cb->args[1] = sta_idx;
1057 err = skb->len;
1058 out_err_rtnl:
1059 rtnl_unlock();
1060 out_err:
1061 cfg80211_put_dev(dev);
1062 out_put_netdev:
1063 dev_put(netdev);
1064
1065 return err;
1066 }
1067
1068 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1069 {
1070 struct cfg80211_registered_device *drv;
1071 int err;
1072 struct net_device *dev;
1073 struct station_info sinfo;
1074 struct sk_buff *msg;
1075 u8 *mac_addr = NULL;
1076
1077 memset(&sinfo, 0, sizeof(sinfo));
1078
1079 if (!info->attrs[NL80211_ATTR_MAC])
1080 return -EINVAL;
1081
1082 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1083
1084 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1085 if (err)
1086 return err;
1087
1088 if (!drv->ops->get_station) {
1089 err = -EOPNOTSUPP;
1090 goto out;
1091 }
1092
1093 rtnl_lock();
1094 err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1095 rtnl_unlock();
1096
1097 if (err)
1098 goto out;
1099
1100 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1101 if (!msg)
1102 goto out;
1103
1104 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1105 dev, mac_addr, &sinfo) < 0)
1106 goto out_free;
1107
1108 err = genlmsg_unicast(msg, info->snd_pid);
1109 goto out;
1110
1111 out_free:
1112 nlmsg_free(msg);
1113
1114 out:
1115 cfg80211_put_dev(drv);
1116 dev_put(dev);
1117 return err;
1118 }
1119
1120 /*
1121 * Get vlan interface making sure it is on the right wiphy.
1122 */
1123 static int get_vlan(struct nlattr *vlanattr,
1124 struct cfg80211_registered_device *rdev,
1125 struct net_device **vlan)
1126 {
1127 *vlan = NULL;
1128
1129 if (vlanattr) {
1130 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1131 if (!*vlan)
1132 return -ENODEV;
1133 if (!(*vlan)->ieee80211_ptr)
1134 return -EINVAL;
1135 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1136 return -EINVAL;
1137 }
1138 return 0;
1139 }
1140
1141 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1142 {
1143 struct cfg80211_registered_device *drv;
1144 int err;
1145 struct net_device *dev;
1146 struct station_parameters params;
1147 u8 *mac_addr = NULL;
1148
1149 memset(&params, 0, sizeof(params));
1150
1151 params.listen_interval = -1;
1152
1153 if (info->attrs[NL80211_ATTR_STA_AID])
1154 return -EINVAL;
1155
1156 if (!info->attrs[NL80211_ATTR_MAC])
1157 return -EINVAL;
1158
1159 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1160
1161 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1162 params.supported_rates =
1163 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1164 params.supported_rates_len =
1165 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1166 }
1167
1168 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1169 params.listen_interval =
1170 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1171
1172 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1173 params.ht_capa =
1174 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1175
1176 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1177 &params.station_flags))
1178 return -EINVAL;
1179
1180 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1181 params.plink_action =
1182 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1183
1184 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1185 if (err)
1186 return err;
1187
1188 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1189 if (err)
1190 goto out;
1191
1192 if (!drv->ops->change_station) {
1193 err = -EOPNOTSUPP;
1194 goto out;
1195 }
1196
1197 rtnl_lock();
1198 err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1199 rtnl_unlock();
1200
1201 out:
1202 if (params.vlan)
1203 dev_put(params.vlan);
1204 cfg80211_put_dev(drv);
1205 dev_put(dev);
1206 return err;
1207 }
1208
1209 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1210 {
1211 struct cfg80211_registered_device *drv;
1212 int err;
1213 struct net_device *dev;
1214 struct station_parameters params;
1215 u8 *mac_addr = NULL;
1216
1217 memset(&params, 0, sizeof(params));
1218
1219 if (!info->attrs[NL80211_ATTR_MAC])
1220 return -EINVAL;
1221
1222 if (!info->attrs[NL80211_ATTR_STA_AID])
1223 return -EINVAL;
1224
1225 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1226 return -EINVAL;
1227
1228 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1229 return -EINVAL;
1230
1231 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1232 params.supported_rates =
1233 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1234 params.supported_rates_len =
1235 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1236 params.listen_interval =
1237 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1238 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1239 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1240 params.ht_capa =
1241 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1242
1243 if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1244 &params.station_flags))
1245 return -EINVAL;
1246
1247 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1248 if (err)
1249 return err;
1250
1251 err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1252 if (err)
1253 goto out;
1254
1255 if (!drv->ops->add_station) {
1256 err = -EOPNOTSUPP;
1257 goto out;
1258 }
1259
1260 rtnl_lock();
1261 err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1262 rtnl_unlock();
1263
1264 out:
1265 if (params.vlan)
1266 dev_put(params.vlan);
1267 cfg80211_put_dev(drv);
1268 dev_put(dev);
1269 return err;
1270 }
1271
1272 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1273 {
1274 struct cfg80211_registered_device *drv;
1275 int err;
1276 struct net_device *dev;
1277 u8 *mac_addr = NULL;
1278
1279 if (info->attrs[NL80211_ATTR_MAC])
1280 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1281
1282 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1283 if (err)
1284 return err;
1285
1286 if (!drv->ops->del_station) {
1287 err = -EOPNOTSUPP;
1288 goto out;
1289 }
1290
1291 rtnl_lock();
1292 err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1293 rtnl_unlock();
1294
1295 out:
1296 cfg80211_put_dev(drv);
1297 dev_put(dev);
1298 return err;
1299 }
1300
1301 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1302 int flags, struct net_device *dev,
1303 u8 *dst, u8 *next_hop,
1304 struct mpath_info *pinfo)
1305 {
1306 void *hdr;
1307 struct nlattr *pinfoattr;
1308
1309 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1310 if (!hdr)
1311 return -1;
1312
1313 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1314 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1315 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1316
1317 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1318 if (!pinfoattr)
1319 goto nla_put_failure;
1320 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1321 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1322 pinfo->frame_qlen);
1323 if (pinfo->filled & MPATH_INFO_DSN)
1324 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1325 pinfo->dsn);
1326 if (pinfo->filled & MPATH_INFO_METRIC)
1327 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1328 pinfo->metric);
1329 if (pinfo->filled & MPATH_INFO_EXPTIME)
1330 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1331 pinfo->exptime);
1332 if (pinfo->filled & MPATH_INFO_FLAGS)
1333 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1334 pinfo->flags);
1335 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1336 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1337 pinfo->discovery_timeout);
1338 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1339 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1340 pinfo->discovery_retries);
1341
1342 nla_nest_end(msg, pinfoattr);
1343
1344 return genlmsg_end(msg, hdr);
1345
1346 nla_put_failure:
1347 genlmsg_cancel(msg, hdr);
1348 return -EMSGSIZE;
1349 }
1350
1351 static int nl80211_dump_mpath(struct sk_buff *skb,
1352 struct netlink_callback *cb)
1353 {
1354 struct mpath_info pinfo;
1355 struct cfg80211_registered_device *dev;
1356 struct net_device *netdev;
1357 u8 dst[ETH_ALEN];
1358 u8 next_hop[ETH_ALEN];
1359 int ifidx = cb->args[0];
1360 int path_idx = cb->args[1];
1361 int err;
1362
1363 if (!ifidx) {
1364 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1365 nl80211_fam.attrbuf, nl80211_fam.maxattr,
1366 nl80211_policy);
1367 if (err)
1368 return err;
1369
1370 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1371 return -EINVAL;
1372
1373 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1374 if (!ifidx)
1375 return -EINVAL;
1376 }
1377
1378 netdev = dev_get_by_index(&init_net, ifidx);
1379 if (!netdev)
1380 return -ENODEV;
1381
1382 dev = cfg80211_get_dev_from_ifindex(ifidx);
1383 if (IS_ERR(dev)) {
1384 err = PTR_ERR(dev);
1385 goto out_put_netdev;
1386 }
1387
1388 if (!dev->ops->dump_mpath) {
1389 err = -ENOSYS;
1390 goto out_err;
1391 }
1392
1393 rtnl_lock();
1394
1395 while (1) {
1396 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1397 dst, next_hop, &pinfo);
1398 if (err == -ENOENT)
1399 break;
1400 if (err)
1401 goto out_err_rtnl;
1402
1403 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1404 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1405 netdev, dst, next_hop,
1406 &pinfo) < 0)
1407 goto out;
1408
1409 path_idx++;
1410 }
1411
1412
1413 out:
1414 cb->args[1] = path_idx;
1415 err = skb->len;
1416 out_err_rtnl:
1417 rtnl_unlock();
1418 out_err:
1419 cfg80211_put_dev(dev);
1420 out_put_netdev:
1421 dev_put(netdev);
1422
1423 return err;
1424 }
1425
1426 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1427 {
1428 struct cfg80211_registered_device *drv;
1429 int err;
1430 struct net_device *dev;
1431 struct mpath_info pinfo;
1432 struct sk_buff *msg;
1433 u8 *dst = NULL;
1434 u8 next_hop[ETH_ALEN];
1435
1436 memset(&pinfo, 0, sizeof(pinfo));
1437
1438 if (!info->attrs[NL80211_ATTR_MAC])
1439 return -EINVAL;
1440
1441 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1442
1443 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1444 if (err)
1445 return err;
1446
1447 if (!drv->ops->get_mpath) {
1448 err = -EOPNOTSUPP;
1449 goto out;
1450 }
1451
1452 rtnl_lock();
1453 err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1454 rtnl_unlock();
1455
1456 if (err)
1457 goto out;
1458
1459 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1460 if (!msg)
1461 goto out;
1462
1463 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1464 dev, dst, next_hop, &pinfo) < 0)
1465 goto out_free;
1466
1467 err = genlmsg_unicast(msg, info->snd_pid);
1468 goto out;
1469
1470 out_free:
1471 nlmsg_free(msg);
1472
1473 out:
1474 cfg80211_put_dev(drv);
1475 dev_put(dev);
1476 return err;
1477 }
1478
1479 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
1480 {
1481 struct cfg80211_registered_device *drv;
1482 int err;
1483 struct net_device *dev;
1484 u8 *dst = NULL;
1485 u8 *next_hop = NULL;
1486
1487 if (!info->attrs[NL80211_ATTR_MAC])
1488 return -EINVAL;
1489
1490 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1491 return -EINVAL;
1492
1493 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1494 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1495
1496 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1497 if (err)
1498 return err;
1499
1500 if (!drv->ops->change_mpath) {
1501 err = -EOPNOTSUPP;
1502 goto out;
1503 }
1504
1505 rtnl_lock();
1506 err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
1507 rtnl_unlock();
1508
1509 out:
1510 cfg80211_put_dev(drv);
1511 dev_put(dev);
1512 return err;
1513 }
1514 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
1515 {
1516 struct cfg80211_registered_device *drv;
1517 int err;
1518 struct net_device *dev;
1519 u8 *dst = NULL;
1520 u8 *next_hop = NULL;
1521
1522 if (!info->attrs[NL80211_ATTR_MAC])
1523 return -EINVAL;
1524
1525 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1526 return -EINVAL;
1527
1528 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1529 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1530
1531 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1532 if (err)
1533 return err;
1534
1535 if (!drv->ops->add_mpath) {
1536 err = -EOPNOTSUPP;
1537 goto out;
1538 }
1539
1540 rtnl_lock();
1541 err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
1542 rtnl_unlock();
1543
1544 out:
1545 cfg80211_put_dev(drv);
1546 dev_put(dev);
1547 return err;
1548 }
1549
1550 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
1551 {
1552 struct cfg80211_registered_device *drv;
1553 int err;
1554 struct net_device *dev;
1555 u8 *dst = NULL;
1556
1557 if (info->attrs[NL80211_ATTR_MAC])
1558 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1559
1560 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1561 if (err)
1562 return err;
1563
1564 if (!drv->ops->del_mpath) {
1565 err = -EOPNOTSUPP;
1566 goto out;
1567 }
1568
1569 rtnl_lock();
1570 err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
1571 rtnl_unlock();
1572
1573 out:
1574 cfg80211_put_dev(drv);
1575 dev_put(dev);
1576 return err;
1577 }
1578
1579 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
1580 {
1581 struct cfg80211_registered_device *drv;
1582 int err;
1583 struct net_device *dev;
1584 struct bss_parameters params;
1585
1586 memset(&params, 0, sizeof(params));
1587 /* default to not changing parameters */
1588 params.use_cts_prot = -1;
1589 params.use_short_preamble = -1;
1590 params.use_short_slot_time = -1;
1591
1592 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
1593 params.use_cts_prot =
1594 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
1595 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
1596 params.use_short_preamble =
1597 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
1598 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
1599 params.use_short_slot_time =
1600 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
1601
1602 err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1603 if (err)
1604 return err;
1605
1606 if (!drv->ops->change_bss) {
1607 err = -EOPNOTSUPP;
1608 goto out;
1609 }
1610
1611 rtnl_lock();
1612 err = drv->ops->change_bss(&drv->wiphy, dev, &params);
1613 rtnl_unlock();
1614
1615 out:
1616 cfg80211_put_dev(drv);
1617 dev_put(dev);
1618 return err;
1619 }
1620
1621 static const struct nla_policy
1622 reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
1623 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
1624 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
1625 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
1626 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
1627 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
1628 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
1629 };
1630
1631 static int parse_reg_rule(struct nlattr *tb[],
1632 struct ieee80211_reg_rule *reg_rule)
1633 {
1634 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
1635 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
1636
1637 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
1638 return -EINVAL;
1639 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
1640 return -EINVAL;
1641 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
1642 return -EINVAL;
1643 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
1644 return -EINVAL;
1645 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
1646 return -EINVAL;
1647
1648 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
1649
1650 freq_range->start_freq_khz =
1651 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
1652 freq_range->end_freq_khz =
1653 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
1654 freq_range->max_bandwidth_khz =
1655 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
1656
1657 power_rule->max_eirp =
1658 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
1659
1660 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
1661 power_rule->max_antenna_gain =
1662 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
1663
1664 return 0;
1665 }
1666
1667 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
1668 {
1669 int r;
1670 char *data = NULL;
1671
1672 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
1673 return -EINVAL;
1674
1675 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
1676
1677 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
1678 /* We ignore world regdom requests with the old regdom setup */
1679 if (is_world_regdom(data))
1680 return -EINVAL;
1681 #endif
1682 mutex_lock(&cfg80211_drv_mutex);
1683 r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, NULL);
1684 mutex_unlock(&cfg80211_drv_mutex);
1685 return r;
1686 }
1687
1688 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
1689 {
1690 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
1691 struct nlattr *nl_reg_rule;
1692 char *alpha2 = NULL;
1693 int rem_reg_rules = 0, r = 0;
1694 u32 num_rules = 0, rule_idx = 0, size_of_regd;
1695 struct ieee80211_regdomain *rd = NULL;
1696
1697 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
1698 return -EINVAL;
1699
1700 if (!info->attrs[NL80211_ATTR_REG_RULES])
1701 return -EINVAL;
1702
1703 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
1704
1705 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
1706 rem_reg_rules) {
1707 num_rules++;
1708 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
1709 goto bad_reg;
1710 }
1711
1712 if (!reg_is_valid_request(alpha2))
1713 return -EINVAL;
1714
1715 size_of_regd = sizeof(struct ieee80211_regdomain) +
1716 (num_rules * sizeof(struct ieee80211_reg_rule));
1717
1718 rd = kzalloc(size_of_regd, GFP_KERNEL);
1719 if (!rd)
1720 return -ENOMEM;
1721
1722 rd->n_reg_rules = num_rules;
1723 rd->alpha2[0] = alpha2[0];
1724 rd->alpha2[1] = alpha2[1];
1725
1726 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
1727 rem_reg_rules) {
1728 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
1729 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
1730 reg_rule_policy);
1731 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
1732 if (r)
1733 goto bad_reg;
1734
1735 rule_idx++;
1736
1737 if (rule_idx > NL80211_MAX_SUPP_REG_RULES)
1738 goto bad_reg;
1739 }
1740
1741 BUG_ON(rule_idx != num_rules);
1742
1743 mutex_lock(&cfg80211_drv_mutex);
1744 r = set_regdom(rd);
1745 mutex_unlock(&cfg80211_drv_mutex);
1746 if (r)
1747 goto bad_reg;
1748
1749 return r;
1750
1751 bad_reg:
1752 kfree(rd);
1753 return -EINVAL;
1754 }
1755
1756 static struct genl_ops nl80211_ops[] = {
1757 {
1758 .cmd = NL80211_CMD_GET_WIPHY,
1759 .doit = nl80211_get_wiphy,
1760 .dumpit = nl80211_dump_wiphy,
1761 .policy = nl80211_policy,
1762 /* can be retrieved by unprivileged users */
1763 },
1764 {
1765 .cmd = NL80211_CMD_SET_WIPHY,
1766 .doit = nl80211_set_wiphy,
1767 .policy = nl80211_policy,
1768 .flags = GENL_ADMIN_PERM,
1769 },
1770 {
1771 .cmd = NL80211_CMD_GET_INTERFACE,
1772 .doit = nl80211_get_interface,
1773 .dumpit = nl80211_dump_interface,
1774 .policy = nl80211_policy,
1775 /* can be retrieved by unprivileged users */
1776 },
1777 {
1778 .cmd = NL80211_CMD_SET_INTERFACE,
1779 .doit = nl80211_set_interface,
1780 .policy = nl80211_policy,
1781 .flags = GENL_ADMIN_PERM,
1782 },
1783 {
1784 .cmd = NL80211_CMD_NEW_INTERFACE,
1785 .doit = nl80211_new_interface,
1786 .policy = nl80211_policy,
1787 .flags = GENL_ADMIN_PERM,
1788 },
1789 {
1790 .cmd = NL80211_CMD_DEL_INTERFACE,
1791 .doit = nl80211_del_interface,
1792 .policy = nl80211_policy,
1793 .flags = GENL_ADMIN_PERM,
1794 },
1795 {
1796 .cmd = NL80211_CMD_GET_KEY,
1797 .doit = nl80211_get_key,
1798 .policy = nl80211_policy,
1799 .flags = GENL_ADMIN_PERM,
1800 },
1801 {
1802 .cmd = NL80211_CMD_SET_KEY,
1803 .doit = nl80211_set_key,
1804 .policy = nl80211_policy,
1805 .flags = GENL_ADMIN_PERM,
1806 },
1807 {
1808 .cmd = NL80211_CMD_NEW_KEY,
1809 .doit = nl80211_new_key,
1810 .policy = nl80211_policy,
1811 .flags = GENL_ADMIN_PERM,
1812 },
1813 {
1814 .cmd = NL80211_CMD_DEL_KEY,
1815 .doit = nl80211_del_key,
1816 .policy = nl80211_policy,
1817 .flags = GENL_ADMIN_PERM,
1818 },
1819 {
1820 .cmd = NL80211_CMD_SET_BEACON,
1821 .policy = nl80211_policy,
1822 .flags = GENL_ADMIN_PERM,
1823 .doit = nl80211_addset_beacon,
1824 },
1825 {
1826 .cmd = NL80211_CMD_NEW_BEACON,
1827 .policy = nl80211_policy,
1828 .flags = GENL_ADMIN_PERM,
1829 .doit = nl80211_addset_beacon,
1830 },
1831 {
1832 .cmd = NL80211_CMD_DEL_BEACON,
1833 .policy = nl80211_policy,
1834 .flags = GENL_ADMIN_PERM,
1835 .doit = nl80211_del_beacon,
1836 },
1837 {
1838 .cmd = NL80211_CMD_GET_STATION,
1839 .doit = nl80211_get_station,
1840 .dumpit = nl80211_dump_station,
1841 .policy = nl80211_policy,
1842 .flags = GENL_ADMIN_PERM,
1843 },
1844 {
1845 .cmd = NL80211_CMD_SET_STATION,
1846 .doit = nl80211_set_station,
1847 .policy = nl80211_policy,
1848 .flags = GENL_ADMIN_PERM,
1849 },
1850 {
1851 .cmd = NL80211_CMD_NEW_STATION,
1852 .doit = nl80211_new_station,
1853 .policy = nl80211_policy,
1854 .flags = GENL_ADMIN_PERM,
1855 },
1856 {
1857 .cmd = NL80211_CMD_DEL_STATION,
1858 .doit = nl80211_del_station,
1859 .policy = nl80211_policy,
1860 .flags = GENL_ADMIN_PERM,
1861 },
1862 {
1863 .cmd = NL80211_CMD_GET_MPATH,
1864 .doit = nl80211_get_mpath,
1865 .dumpit = nl80211_dump_mpath,
1866 .policy = nl80211_policy,
1867 .flags = GENL_ADMIN_PERM,
1868 },
1869 {
1870 .cmd = NL80211_CMD_SET_MPATH,
1871 .doit = nl80211_set_mpath,
1872 .policy = nl80211_policy,
1873 .flags = GENL_ADMIN_PERM,
1874 },
1875 {
1876 .cmd = NL80211_CMD_NEW_MPATH,
1877 .doit = nl80211_new_mpath,
1878 .policy = nl80211_policy,
1879 .flags = GENL_ADMIN_PERM,
1880 },
1881 {
1882 .cmd = NL80211_CMD_DEL_MPATH,
1883 .doit = nl80211_del_mpath,
1884 .policy = nl80211_policy,
1885 .flags = GENL_ADMIN_PERM,
1886 },
1887 {
1888 .cmd = NL80211_CMD_SET_BSS,
1889 .doit = nl80211_set_bss,
1890 .policy = nl80211_policy,
1891 .flags = GENL_ADMIN_PERM,
1892 },
1893 {
1894 .cmd = NL80211_CMD_SET_REG,
1895 .doit = nl80211_set_reg,
1896 .policy = nl80211_policy,
1897 .flags = GENL_ADMIN_PERM,
1898 },
1899 {
1900 .cmd = NL80211_CMD_REQ_SET_REG,
1901 .doit = nl80211_req_set_reg,
1902 .policy = nl80211_policy,
1903 .flags = GENL_ADMIN_PERM,
1904 },
1905 };
1906
1907 /* multicast groups */
1908 static struct genl_multicast_group nl80211_config_mcgrp = {
1909 .name = "config",
1910 };
1911
1912 /* notification functions */
1913
1914 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
1915 {
1916 struct sk_buff *msg;
1917
1918 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1919 if (!msg)
1920 return;
1921
1922 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
1923 nlmsg_free(msg);
1924 return;
1925 }
1926
1927 genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
1928 }
1929
1930 /* initialisation/exit functions */
1931
1932 int nl80211_init(void)
1933 {
1934 int err, i;
1935
1936 err = genl_register_family(&nl80211_fam);
1937 if (err)
1938 return err;
1939
1940 for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
1941 err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
1942 if (err)
1943 goto err_out;
1944 }
1945
1946 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
1947 if (err)
1948 goto err_out;
1949
1950 return 0;
1951 err_out:
1952 genl_unregister_family(&nl80211_fam);
1953 return err;
1954 }
1955
1956 void nl80211_exit(void)
1957 {
1958 genl_unregister_family(&nl80211_fam);
1959 }
Support for the Chinese Samsung S3C2440 based development boards