cfg80211: accept no-op interface mode changes
[linux-2.6.git] / net / wireless / nl80211.c
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/list.h>
11 #include <linux/if_ether.h>
12 #include <linux/ieee80211.h>
13 #include <linux/nl80211.h>
14 #include <linux/rtnetlink.h>
15 #include <linux/netlink.h>
16 #include <linux/etherdevice.h>
17 #include <net/genetlink.h>
18 #include <net/cfg80211.h>
19 #include "core.h"
20 #include "nl80211.h"
21 #include "reg.h"
22
23 /* the netlink family */
24 static struct genl_family nl80211_fam = {
25         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
26         .name = "nl80211",      /* have users key off the name instead */
27         .hdrsize = 0,           /* no private header */
28         .version = 1,           /* no particular meaning now */
29         .maxattr = NL80211_ATTR_MAX,
30 };
31
32 /* internal helper: get drv and dev */
33 static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
34                                        struct cfg80211_registered_device **drv,
35                                        struct net_device **dev)
36 {
37         int ifindex;
38
39         if (!attrs[NL80211_ATTR_IFINDEX])
40                 return -EINVAL;
41
42         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
43         *dev = dev_get_by_index(&init_net, ifindex);
44         if (!*dev)
45                 return -ENODEV;
46
47         *drv = cfg80211_get_dev_from_ifindex(ifindex);
48         if (IS_ERR(*drv)) {
49                 dev_put(*dev);
50                 return PTR_ERR(*drv);
51         }
52
53         return 0;
54 }
55
56 /* policy for the attributes */
57 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
58         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
59         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
60                                       .len = BUS_ID_SIZE-1 },
61         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
62         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
63         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
64
65         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
66         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
67         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
68
69         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
70
71         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
72                                     .len = WLAN_MAX_KEY_LEN },
73         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
74         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
75         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
76
77         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
78         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
79         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
80                                        .len = IEEE80211_MAX_DATA_LEN },
81         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
82                                        .len = IEEE80211_MAX_DATA_LEN },
83         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
84         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
85         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
86         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
87                                                .len = NL80211_MAX_SUPP_RATES },
88         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
89         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
90         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
91         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
92                                 .len = IEEE80211_MAX_MESH_ID_LEN },
93         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
94
95         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
96         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
97
98         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
99         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
100         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
101         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
102                                            .len = NL80211_MAX_SUPP_RATES },
103
104         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
105
106         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
107                                          .len = NL80211_HT_CAPABILITY_LEN },
108
109         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
110         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
111                               .len = IEEE80211_MAX_DATA_LEN },
112         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
113         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
114
115         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
116                                 .len = IEEE80211_MAX_SSID_LEN },
117         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
118         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
119 };
120
121 /* message building helper */
122 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
123                                    int flags, u8 cmd)
124 {
125         /* since there is no private header just add the generic one */
126         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
127 }
128
129 /* netlink command implementations */
130
131 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
132                               struct cfg80211_registered_device *dev)
133 {
134         void *hdr;
135         struct nlattr *nl_bands, *nl_band;
136         struct nlattr *nl_freqs, *nl_freq;
137         struct nlattr *nl_rates, *nl_rate;
138         struct nlattr *nl_modes;
139         struct nlattr *nl_cmds;
140         enum ieee80211_band band;
141         struct ieee80211_channel *chan;
142         struct ieee80211_rate *rate;
143         int i;
144         u16 ifmodes = dev->wiphy.interface_modes;
145
146         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
147         if (!hdr)
148                 return -1;
149
150         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
151         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
152         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
153                    dev->wiphy.max_scan_ssids);
154
155         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
156         if (!nl_modes)
157                 goto nla_put_failure;
158
159         i = 0;
160         while (ifmodes) {
161                 if (ifmodes & 1)
162                         NLA_PUT_FLAG(msg, i);
163                 ifmodes >>= 1;
164                 i++;
165         }
166
167         nla_nest_end(msg, nl_modes);
168
169         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
170         if (!nl_bands)
171                 goto nla_put_failure;
172
173         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
174                 if (!dev->wiphy.bands[band])
175                         continue;
176
177                 nl_band = nla_nest_start(msg, band);
178                 if (!nl_band)
179                         goto nla_put_failure;
180
181                 /* add HT info */
182                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
183                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
184                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
185                                 &dev->wiphy.bands[band]->ht_cap.mcs);
186                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
187                                 dev->wiphy.bands[band]->ht_cap.cap);
188                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
189                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
190                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
191                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
192                 }
193
194                 /* add frequencies */
195                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
196                 if (!nl_freqs)
197                         goto nla_put_failure;
198
199                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
200                         nl_freq = nla_nest_start(msg, i);
201                         if (!nl_freq)
202                                 goto nla_put_failure;
203
204                         chan = &dev->wiphy.bands[band]->channels[i];
205                         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
206                                     chan->center_freq);
207
208                         if (chan->flags & IEEE80211_CHAN_DISABLED)
209                                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
210                         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
211                                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
212                         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
213                                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
214                         if (chan->flags & IEEE80211_CHAN_RADAR)
215                                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
216
217                         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
218                                     DBM_TO_MBM(chan->max_power));
219
220                         nla_nest_end(msg, nl_freq);
221                 }
222
223                 nla_nest_end(msg, nl_freqs);
224
225                 /* add bitrates */
226                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
227                 if (!nl_rates)
228                         goto nla_put_failure;
229
230                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
231                         nl_rate = nla_nest_start(msg, i);
232                         if (!nl_rate)
233                                 goto nla_put_failure;
234
235                         rate = &dev->wiphy.bands[band]->bitrates[i];
236                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
237                                     rate->bitrate);
238                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
239                                 NLA_PUT_FLAG(msg,
240                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
241
242                         nla_nest_end(msg, nl_rate);
243                 }
244
245                 nla_nest_end(msg, nl_rates);
246
247                 nla_nest_end(msg, nl_band);
248         }
249         nla_nest_end(msg, nl_bands);
250
251         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
252         if (!nl_cmds)
253                 goto nla_put_failure;
254
255         i = 0;
256 #define CMD(op, n)                                              \
257          do {                                                   \
258                 if (dev->ops->op) {                             \
259                         i++;                                    \
260                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
261                 }                                               \
262         } while (0)
263
264         CMD(add_virtual_intf, NEW_INTERFACE);
265         CMD(change_virtual_intf, SET_INTERFACE);
266         CMD(add_key, NEW_KEY);
267         CMD(add_beacon, NEW_BEACON);
268         CMD(add_station, NEW_STATION);
269         CMD(add_mpath, NEW_MPATH);
270         CMD(set_mesh_params, SET_MESH_PARAMS);
271         CMD(change_bss, SET_BSS);
272         CMD(auth, AUTHENTICATE);
273         CMD(assoc, ASSOCIATE);
274         CMD(deauth, DEAUTHENTICATE);
275         CMD(disassoc, DISASSOCIATE);
276
277 #undef CMD
278         nla_nest_end(msg, nl_cmds);
279
280         return genlmsg_end(msg, hdr);
281
282  nla_put_failure:
283         genlmsg_cancel(msg, hdr);
284         return -EMSGSIZE;
285 }
286
287 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
288 {
289         int idx = 0;
290         int start = cb->args[0];
291         struct cfg80211_registered_device *dev;
292
293         mutex_lock(&cfg80211_mutex);
294         list_for_each_entry(dev, &cfg80211_drv_list, list) {
295                 if (++idx <= start)
296                         continue;
297                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
298                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
299                                        dev) < 0) {
300                         idx--;
301                         break;
302                 }
303         }
304         mutex_unlock(&cfg80211_mutex);
305
306         cb->args[0] = idx;
307
308         return skb->len;
309 }
310
311 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
312 {
313         struct sk_buff *msg;
314         struct cfg80211_registered_device *dev;
315
316         dev = cfg80211_get_dev_from_info(info);
317         if (IS_ERR(dev))
318                 return PTR_ERR(dev);
319
320         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
321         if (!msg)
322                 goto out_err;
323
324         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
325                 goto out_free;
326
327         cfg80211_put_dev(dev);
328
329         return genlmsg_unicast(msg, info->snd_pid);
330
331  out_free:
332         nlmsg_free(msg);
333  out_err:
334         cfg80211_put_dev(dev);
335         return -ENOBUFS;
336 }
337
338 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
339         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
340         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
341         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
342         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
343         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
344 };
345
346 static int parse_txq_params(struct nlattr *tb[],
347                             struct ieee80211_txq_params *txq_params)
348 {
349         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
350             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
351             !tb[NL80211_TXQ_ATTR_AIFS])
352                 return -EINVAL;
353
354         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
355         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
356         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
357         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
358         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
359
360         return 0;
361 }
362
363 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
364 {
365         struct cfg80211_registered_device *rdev;
366         int result = 0, rem_txq_params = 0;
367         struct nlattr *nl_txq_params;
368
369         rdev = cfg80211_get_dev_from_info(info);
370         if (IS_ERR(rdev))
371                 return PTR_ERR(rdev);
372
373         if (info->attrs[NL80211_ATTR_WIPHY_NAME]) {
374                 result = cfg80211_dev_rename(
375                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
376                 if (result)
377                         goto bad_res;
378         }
379
380         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
381                 struct ieee80211_txq_params txq_params;
382                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
383
384                 if (!rdev->ops->set_txq_params) {
385                         result = -EOPNOTSUPP;
386                         goto bad_res;
387                 }
388
389                 nla_for_each_nested(nl_txq_params,
390                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
391                                     rem_txq_params) {
392                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
393                                   nla_data(nl_txq_params),
394                                   nla_len(nl_txq_params),
395                                   txq_params_policy);
396                         result = parse_txq_params(tb, &txq_params);
397                         if (result)
398                                 goto bad_res;
399
400                         result = rdev->ops->set_txq_params(&rdev->wiphy,
401                                                            &txq_params);
402                         if (result)
403                                 goto bad_res;
404                 }
405         }
406
407         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
408                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
409                 struct ieee80211_channel *chan;
410                 struct ieee80211_sta_ht_cap *ht_cap;
411                 u32 freq, sec_freq;
412
413                 if (!rdev->ops->set_channel) {
414                         result = -EOPNOTSUPP;
415                         goto bad_res;
416                 }
417
418                 result = -EINVAL;
419
420                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
421                         channel_type = nla_get_u32(info->attrs[
422                                            NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
423                         if (channel_type != NL80211_CHAN_NO_HT &&
424                             channel_type != NL80211_CHAN_HT20 &&
425                             channel_type != NL80211_CHAN_HT40PLUS &&
426                             channel_type != NL80211_CHAN_HT40MINUS)
427                                 goto bad_res;
428                 }
429
430                 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
431                 chan = ieee80211_get_channel(&rdev->wiphy, freq);
432
433                 /* Primary channel not allowed */
434                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
435                         goto bad_res;
436
437                 if (channel_type == NL80211_CHAN_HT40MINUS)
438                         sec_freq = freq - 20;
439                 else if (channel_type == NL80211_CHAN_HT40PLUS)
440                         sec_freq = freq + 20;
441                 else
442                         sec_freq = 0;
443
444                 ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
445
446                 /* no HT capabilities */
447                 if (channel_type != NL80211_CHAN_NO_HT &&
448                     !ht_cap->ht_supported)
449                         goto bad_res;
450
451                 if (sec_freq) {
452                         struct ieee80211_channel *schan;
453
454                         /* no 40 MHz capabilities */
455                         if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
456                             (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
457                                 goto bad_res;
458
459                         schan = ieee80211_get_channel(&rdev->wiphy, sec_freq);
460
461                         /* Secondary channel not allowed */
462                         if (!schan || schan->flags & IEEE80211_CHAN_DISABLED)
463                                 goto bad_res;
464                 }
465
466                 result = rdev->ops->set_channel(&rdev->wiphy, chan,
467                                                 channel_type);
468                 if (result)
469                         goto bad_res;
470         }
471
472
473  bad_res:
474         cfg80211_put_dev(rdev);
475         return result;
476 }
477
478
479 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
480                               struct net_device *dev)
481 {
482         void *hdr;
483
484         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
485         if (!hdr)
486                 return -1;
487
488         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
489         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
490         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
491         return genlmsg_end(msg, hdr);
492
493  nla_put_failure:
494         genlmsg_cancel(msg, hdr);
495         return -EMSGSIZE;
496 }
497
498 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
499 {
500         int wp_idx = 0;
501         int if_idx = 0;
502         int wp_start = cb->args[0];
503         int if_start = cb->args[1];
504         struct cfg80211_registered_device *dev;
505         struct wireless_dev *wdev;
506
507         mutex_lock(&cfg80211_mutex);
508         list_for_each_entry(dev, &cfg80211_drv_list, list) {
509                 if (wp_idx < wp_start) {
510                         wp_idx++;
511                         continue;
512                 }
513                 if_idx = 0;
514
515                 mutex_lock(&dev->devlist_mtx);
516                 list_for_each_entry(wdev, &dev->netdev_list, list) {
517                         if (if_idx < if_start) {
518                                 if_idx++;
519                                 continue;
520                         }
521                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
522                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
523                                                wdev->netdev) < 0) {
524                                 mutex_unlock(&dev->devlist_mtx);
525                                 goto out;
526                         }
527                         if_idx++;
528                 }
529                 mutex_unlock(&dev->devlist_mtx);
530
531                 wp_idx++;
532         }
533  out:
534         mutex_unlock(&cfg80211_mutex);
535
536         cb->args[0] = wp_idx;
537         cb->args[1] = if_idx;
538
539         return skb->len;
540 }
541
542 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
543 {
544         struct sk_buff *msg;
545         struct cfg80211_registered_device *dev;
546         struct net_device *netdev;
547         int err;
548
549         err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
550         if (err)
551                 return err;
552
553         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
554         if (!msg)
555                 goto out_err;
556
557         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, netdev) < 0)
558                 goto out_free;
559
560         dev_put(netdev);
561         cfg80211_put_dev(dev);
562
563         return genlmsg_unicast(msg, info->snd_pid);
564
565  out_free:
566         nlmsg_free(msg);
567  out_err:
568         dev_put(netdev);
569         cfg80211_put_dev(dev);
570         return -ENOBUFS;
571 }
572
573 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
574         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
575         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
576         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
577         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
578         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
579 };
580
581 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
582 {
583         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
584         int flag;
585
586         *mntrflags = 0;
587
588         if (!nla)
589                 return -EINVAL;
590
591         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
592                              nla, mntr_flags_policy))
593                 return -EINVAL;
594
595         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
596                 if (flags[flag])
597                         *mntrflags |= (1<<flag);
598
599         return 0;
600 }
601
602 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
603 {
604         struct cfg80211_registered_device *drv;
605         struct vif_params params;
606         int err, ifindex;
607         enum nl80211_iftype type;
608         struct net_device *dev;
609         u32 _flags, *flags = NULL;
610         bool change = false;
611
612         memset(&params, 0, sizeof(params));
613
614         rtnl_lock();
615
616         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
617         if (err)
618                 goto unlock_rtnl;
619
620         ifindex = dev->ifindex;
621         type = dev->ieee80211_ptr->iftype;
622         dev_put(dev);
623
624         if (info->attrs[NL80211_ATTR_IFTYPE]) {
625                 enum nl80211_iftype ntype;
626
627                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
628                 if (type != ntype)
629                         change = true;
630                 type = ntype;
631                 if (type > NL80211_IFTYPE_MAX) {
632                         err = -EINVAL;
633                         goto unlock;
634                 }
635         }
636
637         if (!drv->ops->change_virtual_intf ||
638             !(drv->wiphy.interface_modes & (1 << type))) {
639                 err = -EOPNOTSUPP;
640                 goto unlock;
641         }
642
643         if (info->attrs[NL80211_ATTR_MESH_ID]) {
644                 if (type != NL80211_IFTYPE_MESH_POINT) {
645                         err = -EINVAL;
646                         goto unlock;
647                 }
648                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
649                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
650                 change = true;
651         }
652
653         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
654                 if (type != NL80211_IFTYPE_MONITOR) {
655                         err = -EINVAL;
656                         goto unlock;
657                 }
658                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
659                                           &_flags);
660                 if (err)
661                         goto unlock;
662
663                 flags = &_flags;
664                 change = true;
665         }
666
667         if (change)
668                 err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
669                                                     type, flags, &params);
670         else
671                 err = 0;
672
673         dev = __dev_get_by_index(&init_net, ifindex);
674         WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type));
675
676  unlock:
677         cfg80211_put_dev(drv);
678  unlock_rtnl:
679         rtnl_unlock();
680         return err;
681 }
682
683 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
684 {
685         struct cfg80211_registered_device *drv;
686         struct vif_params params;
687         int err;
688         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
689         u32 flags;
690
691         memset(&params, 0, sizeof(params));
692
693         if (!info->attrs[NL80211_ATTR_IFNAME])
694                 return -EINVAL;
695
696         if (info->attrs[NL80211_ATTR_IFTYPE]) {
697                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
698                 if (type > NL80211_IFTYPE_MAX)
699                         return -EINVAL;
700         }
701
702         rtnl_lock();
703
704         drv = cfg80211_get_dev_from_info(info);
705         if (IS_ERR(drv)) {
706                 err = PTR_ERR(drv);
707                 goto unlock_rtnl;
708         }
709
710         if (!drv->ops->add_virtual_intf ||
711             !(drv->wiphy.interface_modes & (1 << type))) {
712                 err = -EOPNOTSUPP;
713                 goto unlock;
714         }
715
716         if (type == NL80211_IFTYPE_MESH_POINT &&
717             info->attrs[NL80211_ATTR_MESH_ID]) {
718                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
719                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
720         }
721
722         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
723                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
724                                   &flags);
725         err = drv->ops->add_virtual_intf(&drv->wiphy,
726                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
727                 type, err ? NULL : &flags, &params);
728
729  unlock:
730         cfg80211_put_dev(drv);
731  unlock_rtnl:
732         rtnl_unlock();
733         return err;
734 }
735
736 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
737 {
738         struct cfg80211_registered_device *drv;
739         int ifindex, err;
740         struct net_device *dev;
741
742         rtnl_lock();
743
744         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
745         if (err)
746                 goto unlock_rtnl;
747         ifindex = dev->ifindex;
748         dev_put(dev);
749
750         if (!drv->ops->del_virtual_intf) {
751                 err = -EOPNOTSUPP;
752                 goto out;
753         }
754
755         err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
756
757  out:
758         cfg80211_put_dev(drv);
759  unlock_rtnl:
760         rtnl_unlock();
761         return err;
762 }
763
764 struct get_key_cookie {
765         struct sk_buff *msg;
766         int error;
767 };
768
769 static void get_key_callback(void *c, struct key_params *params)
770 {
771         struct get_key_cookie *cookie = c;
772
773         if (params->key)
774                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
775                         params->key_len, params->key);
776
777         if (params->seq)
778                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
779                         params->seq_len, params->seq);
780
781         if (params->cipher)
782                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
783                             params->cipher);
784
785         return;
786  nla_put_failure:
787         cookie->error = 1;
788 }
789
790 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
791 {
792         struct cfg80211_registered_device *drv;
793         int err;
794         struct net_device *dev;
795         u8 key_idx = 0;
796         u8 *mac_addr = NULL;
797         struct get_key_cookie cookie = {
798                 .error = 0,
799         };
800         void *hdr;
801         struct sk_buff *msg;
802
803         if (info->attrs[NL80211_ATTR_KEY_IDX])
804                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
805
806         if (key_idx > 5)
807                 return -EINVAL;
808
809         if (info->attrs[NL80211_ATTR_MAC])
810                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
811
812         rtnl_lock();
813
814         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
815         if (err)
816                 goto unlock_rtnl;
817
818         if (!drv->ops->get_key) {
819                 err = -EOPNOTSUPP;
820                 goto out;
821         }
822
823         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
824         if (!msg) {
825                 err = -ENOMEM;
826                 goto out;
827         }
828
829         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
830                              NL80211_CMD_NEW_KEY);
831
832         if (IS_ERR(hdr)) {
833                 err = PTR_ERR(hdr);
834                 goto out;
835         }
836
837         cookie.msg = msg;
838
839         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
840         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
841         if (mac_addr)
842                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
843
844         err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
845                                 &cookie, get_key_callback);
846
847         if (err)
848                 goto out;
849
850         if (cookie.error)
851                 goto nla_put_failure;
852
853         genlmsg_end(msg, hdr);
854         err = genlmsg_unicast(msg, info->snd_pid);
855         goto out;
856
857  nla_put_failure:
858         err = -ENOBUFS;
859         nlmsg_free(msg);
860  out:
861         cfg80211_put_dev(drv);
862         dev_put(dev);
863  unlock_rtnl:
864         rtnl_unlock();
865
866         return err;
867 }
868
869 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
870 {
871         struct cfg80211_registered_device *drv;
872         int err;
873         struct net_device *dev;
874         u8 key_idx;
875         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
876                     u8 key_index);
877
878         if (!info->attrs[NL80211_ATTR_KEY_IDX])
879                 return -EINVAL;
880
881         key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
882
883         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) {
884                 if (key_idx < 4 || key_idx > 5)
885                         return -EINVAL;
886         } else if (key_idx > 3)
887                 return -EINVAL;
888
889         /* currently only support setting default key */
890         if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] &&
891             !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT])
892                 return -EINVAL;
893
894         rtnl_lock();
895
896         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
897         if (err)
898                 goto unlock_rtnl;
899
900         if (info->attrs[NL80211_ATTR_KEY_DEFAULT])
901                 func = drv->ops->set_default_key;
902         else
903                 func = drv->ops->set_default_mgmt_key;
904
905         if (!func) {
906                 err = -EOPNOTSUPP;
907                 goto out;
908         }
909
910         err = func(&drv->wiphy, dev, key_idx);
911
912  out:
913         cfg80211_put_dev(drv);
914         dev_put(dev);
915
916  unlock_rtnl:
917         rtnl_unlock();
918
919         return err;
920 }
921
922 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
923 {
924         struct cfg80211_registered_device *drv;
925         int err;
926         struct net_device *dev;
927         struct key_params params;
928         u8 key_idx = 0;
929         u8 *mac_addr = NULL;
930
931         memset(&params, 0, sizeof(params));
932
933         if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
934                 return -EINVAL;
935
936         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
937                 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
938                 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
939         }
940
941         if (info->attrs[NL80211_ATTR_KEY_IDX])
942                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
943
944         params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
945
946         if (info->attrs[NL80211_ATTR_MAC])
947                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
948
949         if (key_idx > 5)
950                 return -EINVAL;
951
952         /*
953          * Disallow pairwise keys with non-zero index unless it's WEP
954          * (because current deployments use pairwise WEP keys with
955          * non-zero indizes but 802.11i clearly specifies to use zero)
956          */
957         if (mac_addr && key_idx &&
958             params.cipher != WLAN_CIPHER_SUITE_WEP40 &&
959             params.cipher != WLAN_CIPHER_SUITE_WEP104)
960                 return -EINVAL;
961
962         /* TODO: add definitions for the lengths to linux/ieee80211.h */
963         switch (params.cipher) {
964         case WLAN_CIPHER_SUITE_WEP40:
965                 if (params.key_len != 5)
966                         return -EINVAL;
967                 break;
968         case WLAN_CIPHER_SUITE_TKIP:
969                 if (params.key_len != 32)
970                         return -EINVAL;
971                 break;
972         case WLAN_CIPHER_SUITE_CCMP:
973                 if (params.key_len != 16)
974                         return -EINVAL;
975                 break;
976         case WLAN_CIPHER_SUITE_WEP104:
977                 if (params.key_len != 13)
978                         return -EINVAL;
979                 break;
980         case WLAN_CIPHER_SUITE_AES_CMAC:
981                 if (params.key_len != 16)
982                         return -EINVAL;
983                 break;
984         default:
985                 return -EINVAL;
986         }
987
988         rtnl_lock();
989
990         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
991         if (err)
992                 goto unlock_rtnl;
993
994         if (!drv->ops->add_key) {
995                 err = -EOPNOTSUPP;
996                 goto out;
997         }
998
999         err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
1000
1001  out:
1002         cfg80211_put_dev(drv);
1003         dev_put(dev);
1004  unlock_rtnl:
1005         rtnl_unlock();
1006
1007         return err;
1008 }
1009
1010 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1011 {
1012         struct cfg80211_registered_device *drv;
1013         int err;
1014         struct net_device *dev;
1015         u8 key_idx = 0;
1016         u8 *mac_addr = NULL;
1017
1018         if (info->attrs[NL80211_ATTR_KEY_IDX])
1019                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1020
1021         if (key_idx > 5)
1022                 return -EINVAL;
1023
1024         if (info->attrs[NL80211_ATTR_MAC])
1025                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1026
1027         rtnl_lock();
1028
1029         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1030         if (err)
1031                 goto unlock_rtnl;
1032
1033         if (!drv->ops->del_key) {
1034                 err = -EOPNOTSUPP;
1035                 goto out;
1036         }
1037
1038         err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
1039
1040  out:
1041         cfg80211_put_dev(drv);
1042         dev_put(dev);
1043
1044  unlock_rtnl:
1045         rtnl_unlock();
1046
1047         return err;
1048 }
1049
1050 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1051 {
1052         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1053                     struct beacon_parameters *info);
1054         struct cfg80211_registered_device *drv;
1055         int err;
1056         struct net_device *dev;
1057         struct beacon_parameters params;
1058         int haveinfo = 0;
1059
1060         rtnl_lock();
1061
1062         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1063         if (err)
1064                 goto unlock_rtnl;
1065
1066         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1067                 err = -EOPNOTSUPP;
1068                 goto out;
1069         }
1070
1071         switch (info->genlhdr->cmd) {
1072         case NL80211_CMD_NEW_BEACON:
1073                 /* these are required for NEW_BEACON */
1074                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1075                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1076                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1077                         err = -EINVAL;
1078                         goto out;
1079                 }
1080
1081                 call = drv->ops->add_beacon;
1082                 break;
1083         case NL80211_CMD_SET_BEACON:
1084                 call = drv->ops->set_beacon;
1085                 break;
1086         default:
1087                 WARN_ON(1);
1088                 err = -EOPNOTSUPP;
1089                 goto out;
1090         }
1091
1092         if (!call) {
1093                 err = -EOPNOTSUPP;
1094                 goto out;
1095         }
1096
1097         memset(&params, 0, sizeof(params));
1098
1099         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1100                 params.interval =
1101                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1102                 haveinfo = 1;
1103         }
1104
1105         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1106                 params.dtim_period =
1107                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1108                 haveinfo = 1;
1109         }
1110
1111         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1112                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1113                 params.head_len =
1114                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1115                 haveinfo = 1;
1116         }
1117
1118         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1119                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1120                 params.tail_len =
1121                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1122                 haveinfo = 1;
1123         }
1124
1125         if (!haveinfo) {
1126                 err = -EINVAL;
1127                 goto out;
1128         }
1129
1130         err = call(&drv->wiphy, dev, &params);
1131
1132  out:
1133         cfg80211_put_dev(drv);
1134         dev_put(dev);
1135  unlock_rtnl:
1136         rtnl_unlock();
1137
1138         return err;
1139 }
1140
1141 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1142 {
1143         struct cfg80211_registered_device *drv;
1144         int err;
1145         struct net_device *dev;
1146
1147         rtnl_lock();
1148
1149         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1150         if (err)
1151                 goto unlock_rtnl;
1152
1153         if (!drv->ops->del_beacon) {
1154                 err = -EOPNOTSUPP;
1155                 goto out;
1156         }
1157
1158         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1159                 err = -EOPNOTSUPP;
1160                 goto out;
1161         }
1162         err = drv->ops->del_beacon(&drv->wiphy, dev);
1163
1164  out:
1165         cfg80211_put_dev(drv);
1166         dev_put(dev);
1167  unlock_rtnl:
1168         rtnl_unlock();
1169
1170         return err;
1171 }
1172
1173 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1174         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1175         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1176         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1177 };
1178
1179 static int parse_station_flags(struct nlattr *nla, u32 *staflags)
1180 {
1181         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1182         int flag;
1183
1184         *staflags = 0;
1185
1186         if (!nla)
1187                 return 0;
1188
1189         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1190                              nla, sta_flags_policy))
1191                 return -EINVAL;
1192
1193         *staflags = STATION_FLAG_CHANGED;
1194
1195         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1196                 if (flags[flag])
1197                         *staflags |= (1<<flag);
1198
1199         return 0;
1200 }
1201
1202 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1203 {
1204         int modulation, streams, bitrate;
1205
1206         if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1207                 return rate->legacy;
1208
1209         /* the formula below does only work for MCS values smaller than 32 */
1210         if (rate->mcs >= 32)
1211                 return 0;
1212
1213         modulation = rate->mcs & 7;
1214         streams = (rate->mcs >> 3) + 1;
1215
1216         bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1217                         13500000 : 6500000;
1218
1219         if (modulation < 4)
1220                 bitrate *= (modulation + 1);
1221         else if (modulation == 4)
1222                 bitrate *= (modulation + 2);
1223         else
1224                 bitrate *= (modulation + 3);
1225
1226         bitrate *= streams;
1227
1228         if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1229                 bitrate = (bitrate / 9) * 10;
1230
1231         /* do NOT round down here */
1232         return (bitrate + 50000) / 100000;
1233 }
1234
1235 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1236                                 int flags, struct net_device *dev,
1237                                 u8 *mac_addr, struct station_info *sinfo)
1238 {
1239         void *hdr;
1240         struct nlattr *sinfoattr, *txrate;
1241         u16 bitrate;
1242
1243         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1244         if (!hdr)
1245                 return -1;
1246
1247         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1248         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1249
1250         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1251         if (!sinfoattr)
1252                 goto nla_put_failure;
1253         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1254                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1255                             sinfo->inactive_time);
1256         if (sinfo->filled & STATION_INFO_RX_BYTES)
1257                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1258                             sinfo->rx_bytes);
1259         if (sinfo->filled & STATION_INFO_TX_BYTES)
1260                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1261                             sinfo->tx_bytes);
1262         if (sinfo->filled & STATION_INFO_LLID)
1263                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1264                             sinfo->llid);
1265         if (sinfo->filled & STATION_INFO_PLID)
1266                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1267                             sinfo->plid);
1268         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1269                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1270                             sinfo->plink_state);
1271         if (sinfo->filled & STATION_INFO_SIGNAL)
1272                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1273                            sinfo->signal);
1274         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1275                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1276                 if (!txrate)
1277                         goto nla_put_failure;
1278
1279                 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1280                 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1281                 if (bitrate > 0)
1282                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1283
1284                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1285                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1286                                     sinfo->txrate.mcs);
1287                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1288                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1289                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1290                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1291
1292                 nla_nest_end(msg, txrate);
1293         }
1294         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1295                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1296                             sinfo->rx_packets);
1297         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1298                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1299                             sinfo->tx_packets);
1300         nla_nest_end(msg, sinfoattr);
1301
1302         return genlmsg_end(msg, hdr);
1303
1304  nla_put_failure:
1305         genlmsg_cancel(msg, hdr);
1306         return -EMSGSIZE;
1307 }
1308
1309 static int nl80211_dump_station(struct sk_buff *skb,
1310                                 struct netlink_callback *cb)
1311 {
1312         struct station_info sinfo;
1313         struct cfg80211_registered_device *dev;
1314         struct net_device *netdev;
1315         u8 mac_addr[ETH_ALEN];
1316         int ifidx = cb->args[0];
1317         int sta_idx = cb->args[1];
1318         int err;
1319
1320         if (!ifidx) {
1321                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1322                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1323                                   nl80211_policy);
1324                 if (err)
1325                         return err;
1326
1327                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1328                         return -EINVAL;
1329
1330                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1331                 if (!ifidx)
1332                         return -EINVAL;
1333         }
1334
1335         rtnl_lock();
1336
1337         netdev = __dev_get_by_index(&init_net, ifidx);
1338         if (!netdev) {
1339                 err = -ENODEV;
1340                 goto out_rtnl;
1341         }
1342
1343         dev = cfg80211_get_dev_from_ifindex(ifidx);
1344         if (IS_ERR(dev)) {
1345                 err = PTR_ERR(dev);
1346                 goto out_rtnl;
1347         }
1348
1349         if (!dev->ops->dump_station) {
1350                 err = -EOPNOTSUPP;
1351                 goto out_err;
1352         }
1353
1354         while (1) {
1355                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1356                                              mac_addr, &sinfo);
1357                 if (err == -ENOENT)
1358                         break;
1359                 if (err)
1360                         goto out_err;
1361
1362                 if (nl80211_send_station(skb,
1363                                 NETLINK_CB(cb->skb).pid,
1364                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1365                                 netdev, mac_addr,
1366                                 &sinfo) < 0)
1367                         goto out;
1368
1369                 sta_idx++;
1370         }
1371
1372
1373  out:
1374         cb->args[1] = sta_idx;
1375         err = skb->len;
1376  out_err:
1377         cfg80211_put_dev(dev);
1378  out_rtnl:
1379         rtnl_unlock();
1380
1381         return err;
1382 }
1383
1384 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1385 {
1386         struct cfg80211_registered_device *drv;
1387         int err;
1388         struct net_device *dev;
1389         struct station_info sinfo;
1390         struct sk_buff *msg;
1391         u8 *mac_addr = NULL;
1392
1393         memset(&sinfo, 0, sizeof(sinfo));
1394
1395         if (!info->attrs[NL80211_ATTR_MAC])
1396                 return -EINVAL;
1397
1398         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1399
1400         rtnl_lock();
1401
1402         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1403         if (err)
1404                 goto out_rtnl;
1405
1406         if (!drv->ops->get_station) {
1407                 err = -EOPNOTSUPP;
1408                 goto out;
1409         }
1410
1411         err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1412         if (err)
1413                 goto out;
1414
1415         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1416         if (!msg)
1417                 goto out;
1418
1419         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1420                                  dev, mac_addr, &sinfo) < 0)
1421                 goto out_free;
1422
1423         err = genlmsg_unicast(msg, info->snd_pid);
1424         goto out;
1425
1426  out_free:
1427         nlmsg_free(msg);
1428  out:
1429         cfg80211_put_dev(drv);
1430         dev_put(dev);
1431  out_rtnl:
1432         rtnl_unlock();
1433
1434         return err;
1435 }
1436
1437 /*
1438  * Get vlan interface making sure it is on the right wiphy.
1439  */
1440 static int get_vlan(struct nlattr *vlanattr,
1441                     struct cfg80211_registered_device *rdev,
1442                     struct net_device **vlan)
1443 {
1444         *vlan = NULL;
1445
1446         if (vlanattr) {
1447                 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1448                 if (!*vlan)
1449                         return -ENODEV;
1450                 if (!(*vlan)->ieee80211_ptr)
1451                         return -EINVAL;
1452                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1453                         return -EINVAL;
1454         }
1455         return 0;
1456 }
1457
1458 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1459 {
1460         struct cfg80211_registered_device *drv;
1461         int err;
1462         struct net_device *dev;
1463         struct station_parameters params;
1464         u8 *mac_addr = NULL;
1465
1466         memset(&params, 0, sizeof(params));
1467
1468         params.listen_interval = -1;
1469
1470         if (info->attrs[NL80211_ATTR_STA_AID])
1471                 return -EINVAL;
1472
1473         if (!info->attrs[NL80211_ATTR_MAC])
1474                 return -EINVAL;
1475
1476         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1477
1478         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1479                 params.supported_rates =
1480                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1481                 params.supported_rates_len =
1482                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1483         }
1484
1485         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1486                 params.listen_interval =
1487                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1488
1489         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1490                 params.ht_capa =
1491                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1492
1493         if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1494                                 &params.station_flags))
1495                 return -EINVAL;
1496
1497         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1498                 params.plink_action =
1499                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1500
1501         rtnl_lock();
1502
1503         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1504         if (err)
1505                 goto out_rtnl;
1506
1507         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1508         if (err)
1509                 goto out;
1510
1511         if (!drv->ops->change_station) {
1512                 err = -EOPNOTSUPP;
1513                 goto out;
1514         }
1515
1516         err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1517
1518  out:
1519         if (params.vlan)
1520                 dev_put(params.vlan);
1521         cfg80211_put_dev(drv);
1522         dev_put(dev);
1523  out_rtnl:
1524         rtnl_unlock();
1525
1526         return err;
1527 }
1528
1529 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1530 {
1531         struct cfg80211_registered_device *drv;
1532         int err;
1533         struct net_device *dev;
1534         struct station_parameters params;
1535         u8 *mac_addr = NULL;
1536
1537         memset(&params, 0, sizeof(params));
1538
1539         if (!info->attrs[NL80211_ATTR_MAC])
1540                 return -EINVAL;
1541
1542         if (!info->attrs[NL80211_ATTR_STA_AID])
1543                 return -EINVAL;
1544
1545         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1546                 return -EINVAL;
1547
1548         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1549                 return -EINVAL;
1550
1551         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1552         params.supported_rates =
1553                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1554         params.supported_rates_len =
1555                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1556         params.listen_interval =
1557                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1558         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1559         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1560                 params.ht_capa =
1561                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1562
1563         if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
1564                                 &params.station_flags))
1565                 return -EINVAL;
1566
1567         rtnl_lock();
1568
1569         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1570         if (err)
1571                 goto out_rtnl;
1572
1573         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1574         if (err)
1575                 goto out;
1576
1577         if (!drv->ops->add_station) {
1578                 err = -EOPNOTSUPP;
1579                 goto out;
1580         }
1581
1582         if (!netif_running(dev)) {
1583                 err = -ENETDOWN;
1584                 goto out;
1585         }
1586
1587         err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1588
1589  out:
1590         if (params.vlan)
1591                 dev_put(params.vlan);
1592         cfg80211_put_dev(drv);
1593         dev_put(dev);
1594  out_rtnl:
1595         rtnl_unlock();
1596
1597         return err;
1598 }
1599
1600 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1601 {
1602         struct cfg80211_registered_device *drv;
1603         int err;
1604         struct net_device *dev;
1605         u8 *mac_addr = NULL;
1606
1607         if (info->attrs[NL80211_ATTR_MAC])
1608                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1609
1610         rtnl_lock();
1611
1612         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1613         if (err)
1614                 goto out_rtnl;
1615
1616         if (!drv->ops->del_station) {
1617                 err = -EOPNOTSUPP;
1618                 goto out;
1619         }
1620
1621         err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1622
1623  out:
1624         cfg80211_put_dev(drv);
1625         dev_put(dev);
1626  out_rtnl:
1627         rtnl_unlock();
1628
1629         return err;
1630 }
1631
1632 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1633                                 int flags, struct net_device *dev,
1634                                 u8 *dst, u8 *next_hop,
1635                                 struct mpath_info *pinfo)
1636 {
1637         void *hdr;
1638         struct nlattr *pinfoattr;
1639
1640         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1641         if (!hdr)
1642                 return -1;
1643
1644         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1645         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1646         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1647
1648         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1649         if (!pinfoattr)
1650                 goto nla_put_failure;
1651         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1652                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1653                             pinfo->frame_qlen);
1654         if (pinfo->filled & MPATH_INFO_DSN)
1655                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1656                             pinfo->dsn);
1657         if (pinfo->filled & MPATH_INFO_METRIC)
1658                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1659                             pinfo->metric);
1660         if (pinfo->filled & MPATH_INFO_EXPTIME)
1661                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1662                             pinfo->exptime);
1663         if (pinfo->filled & MPATH_INFO_FLAGS)
1664                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1665                             pinfo->flags);
1666         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1667                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1668                             pinfo->discovery_timeout);
1669         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1670                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1671                             pinfo->discovery_retries);
1672
1673         nla_nest_end(msg, pinfoattr);
1674
1675         return genlmsg_end(msg, hdr);
1676
1677  nla_put_failure:
1678         genlmsg_cancel(msg, hdr);
1679         return -EMSGSIZE;
1680 }
1681
1682 static int nl80211_dump_mpath(struct sk_buff *skb,
1683                               struct netlink_callback *cb)
1684 {
1685         struct mpath_info pinfo;
1686         struct cfg80211_registered_device *dev;
1687         struct net_device *netdev;
1688         u8 dst[ETH_ALEN];
1689         u8 next_hop[ETH_ALEN];
1690         int ifidx = cb->args[0];
1691         int path_idx = cb->args[1];
1692         int err;
1693
1694         if (!ifidx) {
1695                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1696                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1697                                   nl80211_policy);
1698                 if (err)
1699                         return err;
1700
1701                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1702                         return -EINVAL;
1703
1704                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1705                 if (!ifidx)
1706                         return -EINVAL;
1707         }
1708
1709         rtnl_lock();
1710
1711         netdev = __dev_get_by_index(&init_net, ifidx);
1712         if (!netdev) {
1713                 err = -ENODEV;
1714                 goto out_rtnl;
1715         }
1716
1717         dev = cfg80211_get_dev_from_ifindex(ifidx);
1718         if (IS_ERR(dev)) {
1719                 err = PTR_ERR(dev);
1720                 goto out_rtnl;
1721         }
1722
1723         if (!dev->ops->dump_mpath) {
1724                 err = -EOPNOTSUPP;
1725                 goto out_err;
1726         }
1727
1728         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1729                 err = -EOPNOTSUPP;
1730                 goto out;
1731         }
1732
1733         while (1) {
1734                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1735                                            dst, next_hop, &pinfo);
1736                 if (err == -ENOENT)
1737                         break;
1738                 if (err)
1739                         goto out_err;
1740
1741                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1742                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1743                                        netdev, dst, next_hop,
1744                                        &pinfo) < 0)
1745                         goto out;
1746
1747                 path_idx++;
1748         }
1749
1750
1751  out:
1752         cb->args[1] = path_idx;
1753         err = skb->len;
1754  out_err:
1755         cfg80211_put_dev(dev);
1756  out_rtnl:
1757         rtnl_unlock();
1758
1759         return err;
1760 }
1761
1762 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1763 {
1764         struct cfg80211_registered_device *drv;
1765         int err;
1766         struct net_device *dev;
1767         struct mpath_info pinfo;
1768         struct sk_buff *msg;
1769         u8 *dst = NULL;
1770         u8 next_hop[ETH_ALEN];
1771
1772         memset(&pinfo, 0, sizeof(pinfo));
1773
1774         if (!info->attrs[NL80211_ATTR_MAC])
1775                 return -EINVAL;
1776
1777         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1778
1779         rtnl_lock();
1780
1781         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1782         if (err)
1783                 goto out_rtnl;
1784
1785         if (!drv->ops->get_mpath) {
1786                 err = -EOPNOTSUPP;
1787                 goto out;
1788         }
1789
1790         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1791                 err = -EOPNOTSUPP;
1792                 goto out;
1793         }
1794
1795         err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1796         if (err)
1797                 goto out;
1798
1799         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1800         if (!msg)
1801                 goto out;
1802
1803         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1804                                  dev, dst, next_hop, &pinfo) < 0)
1805                 goto out_free;
1806
1807         err = genlmsg_unicast(msg, info->snd_pid);
1808         goto out;
1809
1810  out_free:
1811         nlmsg_free(msg);
1812  out:
1813         cfg80211_put_dev(drv);
1814         dev_put(dev);
1815  out_rtnl:
1816         rtnl_unlock();
1817
1818         return err;
1819 }
1820
1821 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
1822 {
1823         struct cfg80211_registered_device *drv;
1824         int err;
1825         struct net_device *dev;
1826         u8 *dst = NULL;
1827         u8 *next_hop = NULL;
1828
1829         if (!info->attrs[NL80211_ATTR_MAC])
1830                 return -EINVAL;
1831
1832         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1833                 return -EINVAL;
1834
1835         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1836         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1837
1838         rtnl_lock();
1839
1840         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1841         if (err)
1842                 goto out_rtnl;
1843
1844         if (!drv->ops->change_mpath) {
1845                 err = -EOPNOTSUPP;
1846                 goto out;
1847         }
1848
1849         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1850                 err = -EOPNOTSUPP;
1851                 goto out;
1852         }
1853
1854         if (!netif_running(dev)) {
1855                 err = -ENETDOWN;
1856                 goto out;
1857         }
1858
1859         err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
1860
1861  out:
1862         cfg80211_put_dev(drv);
1863         dev_put(dev);
1864  out_rtnl:
1865         rtnl_unlock();
1866
1867         return err;
1868 }
1869 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
1870 {
1871         struct cfg80211_registered_device *drv;
1872         int err;
1873         struct net_device *dev;
1874         u8 *dst = NULL;
1875         u8 *next_hop = NULL;
1876
1877         if (!info->attrs[NL80211_ATTR_MAC])
1878                 return -EINVAL;
1879
1880         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
1881                 return -EINVAL;
1882
1883         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1884         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
1885
1886         rtnl_lock();
1887
1888         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1889         if (err)
1890                 goto out_rtnl;
1891
1892         if (!drv->ops->add_mpath) {
1893                 err = -EOPNOTSUPP;
1894                 goto out;
1895         }
1896
1897         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1898                 err = -EOPNOTSUPP;
1899                 goto out;
1900         }
1901
1902         if (!netif_running(dev)) {
1903                 err = -ENETDOWN;
1904                 goto out;
1905         }
1906
1907         err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
1908
1909  out:
1910         cfg80211_put_dev(drv);
1911         dev_put(dev);
1912  out_rtnl:
1913         rtnl_unlock();
1914
1915         return err;
1916 }
1917
1918 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
1919 {
1920         struct cfg80211_registered_device *drv;
1921         int err;
1922         struct net_device *dev;
1923         u8 *dst = NULL;
1924
1925         if (info->attrs[NL80211_ATTR_MAC])
1926                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1927
1928         rtnl_lock();
1929
1930         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1931         if (err)
1932                 goto out_rtnl;
1933
1934         if (!drv->ops->del_mpath) {
1935                 err = -EOPNOTSUPP;
1936                 goto out;
1937         }
1938
1939         err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
1940
1941  out:
1942         cfg80211_put_dev(drv);
1943         dev_put(dev);
1944  out_rtnl:
1945         rtnl_unlock();
1946
1947         return err;
1948 }
1949
1950 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
1951 {
1952         struct cfg80211_registered_device *drv;
1953         int err;
1954         struct net_device *dev;
1955         struct bss_parameters params;
1956
1957         memset(&params, 0, sizeof(params));
1958         /* default to not changing parameters */
1959         params.use_cts_prot = -1;
1960         params.use_short_preamble = -1;
1961         params.use_short_slot_time = -1;
1962
1963         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
1964                 params.use_cts_prot =
1965                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
1966         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
1967                 params.use_short_preamble =
1968                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
1969         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
1970                 params.use_short_slot_time =
1971                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
1972         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
1973                 params.basic_rates =
1974                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
1975                 params.basic_rates_len =
1976                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
1977         }
1978
1979         rtnl_lock();
1980
1981         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1982         if (err)
1983                 goto out_rtnl;
1984
1985         if (!drv->ops->change_bss) {
1986                 err = -EOPNOTSUPP;
1987                 goto out;
1988         }
1989
1990         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1991                 err = -EOPNOTSUPP;
1992                 goto out;
1993         }
1994
1995         err = drv->ops->change_bss(&drv->wiphy, dev, &params);
1996
1997  out:
1998         cfg80211_put_dev(drv);
1999         dev_put(dev);
2000  out_rtnl:
2001         rtnl_unlock();
2002
2003         return err;
2004 }
2005
2006 static const struct nla_policy
2007         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2008         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2009         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2010         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2011         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2012         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2013         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2014 };
2015
2016 static int parse_reg_rule(struct nlattr *tb[],
2017         struct ieee80211_reg_rule *reg_rule)
2018 {
2019         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2020         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2021
2022         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2023                 return -EINVAL;
2024         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2025                 return -EINVAL;
2026         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2027                 return -EINVAL;
2028         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2029                 return -EINVAL;
2030         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2031                 return -EINVAL;
2032
2033         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2034
2035         freq_range->start_freq_khz =
2036                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2037         freq_range->end_freq_khz =
2038                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2039         freq_range->max_bandwidth_khz =
2040                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2041
2042         power_rule->max_eirp =
2043                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2044
2045         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2046                 power_rule->max_antenna_gain =
2047                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2048
2049         return 0;
2050 }
2051
2052 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2053 {
2054         int r;
2055         char *data = NULL;
2056
2057         /*
2058          * You should only get this when cfg80211 hasn't yet initialized
2059          * completely when built-in to the kernel right between the time
2060          * window between nl80211_init() and regulatory_init(), if that is
2061          * even possible.
2062          */
2063         mutex_lock(&cfg80211_mutex);
2064         if (unlikely(!cfg80211_regdomain)) {
2065                 mutex_unlock(&cfg80211_mutex);
2066                 return -EINPROGRESS;
2067         }
2068         mutex_unlock(&cfg80211_mutex);
2069
2070         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2071                 return -EINVAL;
2072
2073         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2074
2075 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2076         /* We ignore world regdom requests with the old regdom setup */
2077         if (is_world_regdom(data))
2078                 return -EINVAL;
2079 #endif
2080
2081         r = regulatory_hint_user(data);
2082
2083         return r;
2084 }
2085
2086 static int nl80211_get_mesh_params(struct sk_buff *skb,
2087         struct genl_info *info)
2088 {
2089         struct cfg80211_registered_device *drv;
2090         struct mesh_config cur_params;
2091         int err;
2092         struct net_device *dev;
2093         void *hdr;
2094         struct nlattr *pinfoattr;
2095         struct sk_buff *msg;
2096
2097         rtnl_lock();
2098
2099         /* Look up our device */
2100         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2101         if (err)
2102                 goto out_rtnl;
2103
2104         if (!drv->ops->get_mesh_params) {
2105                 err = -EOPNOTSUPP;
2106                 goto out;
2107         }
2108
2109         /* Get the mesh params */
2110         err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params);
2111         if (err)
2112                 goto out;
2113
2114         /* Draw up a netlink message to send back */
2115         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2116         if (!msg) {
2117                 err = -ENOBUFS;
2118                 goto out;
2119         }
2120         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2121                              NL80211_CMD_GET_MESH_PARAMS);
2122         if (!hdr)
2123                 goto nla_put_failure;
2124         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2125         if (!pinfoattr)
2126                 goto nla_put_failure;
2127         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2128         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2129                         cur_params.dot11MeshRetryTimeout);
2130         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2131                         cur_params.dot11MeshConfirmTimeout);
2132         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2133                         cur_params.dot11MeshHoldingTimeout);
2134         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2135                         cur_params.dot11MeshMaxPeerLinks);
2136         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2137                         cur_params.dot11MeshMaxRetries);
2138         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2139                         cur_params.dot11MeshTTL);
2140         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2141                         cur_params.auto_open_plinks);
2142         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2143                         cur_params.dot11MeshHWMPmaxPREQretries);
2144         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2145                         cur_params.path_refresh_time);
2146         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2147                         cur_params.min_discovery_timeout);
2148         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2149                         cur_params.dot11MeshHWMPactivePathTimeout);
2150         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2151                         cur_params.dot11MeshHWMPpreqMinInterval);
2152         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2153                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2154         nla_nest_end(msg, pinfoattr);
2155         genlmsg_end(msg, hdr);
2156         err = genlmsg_unicast(msg, info->snd_pid);
2157         goto out;
2158
2159  nla_put_failure:
2160         genlmsg_cancel(msg, hdr);
2161         err = -EMSGSIZE;
2162  out:
2163         /* Cleanup */
2164         cfg80211_put_dev(drv);
2165         dev_put(dev);
2166  out_rtnl:
2167         rtnl_unlock();
2168
2169         return err;
2170 }
2171
2172 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2173 do {\
2174         if (table[attr_num]) {\
2175                 cfg.param = nla_fn(table[attr_num]); \
2176                 mask |= (1 << (attr_num - 1)); \
2177         } \
2178 } while (0);\
2179
2180 static struct nla_policy
2181 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2182         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2183         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2184         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2185         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2186         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2187         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2188         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2189
2190         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2191         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2192         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2193         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2194         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2195         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2196 };
2197
2198 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2199 {
2200         int err;
2201         u32 mask;
2202         struct cfg80211_registered_device *drv;
2203         struct net_device *dev;
2204         struct mesh_config cfg;
2205         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2206         struct nlattr *parent_attr;
2207
2208         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2209         if (!parent_attr)
2210                 return -EINVAL;
2211         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2212                         parent_attr, nl80211_meshconf_params_policy))
2213                 return -EINVAL;
2214
2215         rtnl_lock();
2216
2217         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2218         if (err)
2219                 goto out_rtnl;
2220
2221         if (!drv->ops->set_mesh_params) {
2222                 err = -EOPNOTSUPP;
2223                 goto out;
2224         }
2225
2226         /* This makes sure that there aren't more than 32 mesh config
2227          * parameters (otherwise our bitfield scheme would not work.) */
2228         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2229
2230         /* Fill in the params struct */
2231         mask = 0;
2232         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2233                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2234         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2235                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2236         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2237                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2238         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2239                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2240         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2241                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2242         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2243                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2244         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2245                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2246         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2247                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2248                         nla_get_u8);
2249         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2250                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2251         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2252                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2253                         nla_get_u16);
2254         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2255                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2256                         nla_get_u32);
2257         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2258                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2259                         nla_get_u16);
2260         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2261                         dot11MeshHWMPnetDiameterTraversalTime,
2262                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2263                         nla_get_u16);
2264
2265         /* Apply changes */
2266         err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask);
2267
2268  out:
2269         /* cleanup */
2270         cfg80211_put_dev(drv);
2271         dev_put(dev);
2272  out_rtnl:
2273         rtnl_unlock();
2274
2275         return err;
2276 }
2277
2278 #undef FILL_IN_MESH_PARAM_IF_SET
2279
2280 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2281 {
2282         struct sk_buff *msg;
2283         void *hdr = NULL;
2284         struct nlattr *nl_reg_rules;
2285         unsigned int i;
2286         int err = -EINVAL;
2287
2288         mutex_lock(&cfg80211_mutex);
2289
2290         if (!cfg80211_regdomain)
2291                 goto out;
2292
2293         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2294         if (!msg) {
2295                 err = -ENOBUFS;
2296                 goto out;
2297         }
2298
2299         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2300                              NL80211_CMD_GET_REG);
2301         if (!hdr)
2302                 goto nla_put_failure;
2303
2304         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2305                 cfg80211_regdomain->alpha2);
2306
2307         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2308         if (!nl_reg_rules)
2309                 goto nla_put_failure;
2310
2311         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2312                 struct nlattr *nl_reg_rule;
2313                 const struct ieee80211_reg_rule *reg_rule;
2314                 const struct ieee80211_freq_range *freq_range;
2315                 const struct ieee80211_power_rule *power_rule;
2316
2317                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2318                 freq_range = &reg_rule->freq_range;
2319                 power_rule = &reg_rule->power_rule;
2320
2321                 nl_reg_rule = nla_nest_start(msg, i);
2322                 if (!nl_reg_rule)
2323                         goto nla_put_failure;
2324
2325                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2326                         reg_rule->flags);
2327                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2328                         freq_range->start_freq_khz);
2329                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2330                         freq_range->end_freq_khz);
2331                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2332                         freq_range->max_bandwidth_khz);
2333                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2334                         power_rule->max_antenna_gain);
2335                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2336                         power_rule->max_eirp);
2337
2338                 nla_nest_end(msg, nl_reg_rule);
2339         }
2340
2341         nla_nest_end(msg, nl_reg_rules);
2342
2343         genlmsg_end(msg, hdr);
2344         err = genlmsg_unicast(msg, info->snd_pid);
2345         goto out;
2346
2347 nla_put_failure:
2348         genlmsg_cancel(msg, hdr);
2349         err = -EMSGSIZE;
2350 out:
2351         mutex_unlock(&cfg80211_mutex);
2352         return err;
2353 }
2354
2355 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2356 {
2357         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2358         struct nlattr *nl_reg_rule;
2359         char *alpha2 = NULL;
2360         int rem_reg_rules = 0, r = 0;
2361         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2362         struct ieee80211_regdomain *rd = NULL;
2363
2364         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2365                 return -EINVAL;
2366
2367         if (!info->attrs[NL80211_ATTR_REG_RULES])
2368                 return -EINVAL;
2369
2370         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2371
2372         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2373                         rem_reg_rules) {
2374                 num_rules++;
2375                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2376                         goto bad_reg;
2377         }
2378
2379         if (!reg_is_valid_request(alpha2))
2380                 return -EINVAL;
2381
2382         size_of_regd = sizeof(struct ieee80211_regdomain) +
2383                 (num_rules * sizeof(struct ieee80211_reg_rule));
2384
2385         rd = kzalloc(size_of_regd, GFP_KERNEL);
2386         if (!rd)
2387                 return -ENOMEM;
2388
2389         rd->n_reg_rules = num_rules;
2390         rd->alpha2[0] = alpha2[0];
2391         rd->alpha2[1] = alpha2[1];
2392
2393         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2394                         rem_reg_rules) {
2395                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2396                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2397                         reg_rule_policy);
2398                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2399                 if (r)
2400                         goto bad_reg;
2401
2402                 rule_idx++;
2403
2404                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES)
2405                         goto bad_reg;
2406         }
2407
2408         BUG_ON(rule_idx != num_rules);
2409
2410         mutex_lock(&cfg80211_mutex);
2411         r = set_regdom(rd);
2412         mutex_unlock(&cfg80211_mutex);
2413         return r;
2414
2415  bad_reg:
2416         kfree(rd);
2417         return -EINVAL;
2418 }
2419
2420 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2421 {
2422         struct cfg80211_registered_device *drv;
2423         struct net_device *dev;
2424         struct cfg80211_scan_request *request;
2425         struct cfg80211_ssid *ssid;
2426         struct ieee80211_channel *channel;
2427         struct nlattr *attr;
2428         struct wiphy *wiphy;
2429         int err, tmp, n_ssids = 0, n_channels = 0, i;
2430         enum ieee80211_band band;
2431         size_t ie_len;
2432
2433         rtnl_lock();
2434
2435         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2436         if (err)
2437                 goto out_rtnl;
2438
2439         wiphy = &drv->wiphy;
2440
2441         if (!drv->ops->scan) {
2442                 err = -EOPNOTSUPP;
2443                 goto out;
2444         }
2445
2446         if (!netif_running(dev)) {
2447                 err = -ENETDOWN;
2448                 goto out;
2449         }
2450
2451         if (drv->scan_req) {
2452                 err = -EBUSY;
2453                 goto out;
2454         }
2455
2456         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2457                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp)
2458                         n_channels++;
2459                 if (!n_channels) {
2460                         err = -EINVAL;
2461                         goto out;
2462                 }
2463         } else {
2464                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2465                         if (wiphy->bands[band])
2466                                 n_channels += wiphy->bands[band]->n_channels;
2467         }
2468
2469         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2470                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2471                         n_ssids++;
2472
2473         if (n_ssids > wiphy->max_scan_ssids) {
2474                 err = -EINVAL;
2475                 goto out;
2476         }
2477
2478         if (info->attrs[NL80211_ATTR_IE])
2479                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2480         else
2481                 ie_len = 0;
2482
2483         request = kzalloc(sizeof(*request)
2484                         + sizeof(*ssid) * n_ssids
2485                         + sizeof(channel) * n_channels
2486                         + ie_len, GFP_KERNEL);
2487         if (!request) {
2488                 err = -ENOMEM;
2489                 goto out;
2490         }
2491
2492         request->channels = (void *)((char *)request + sizeof(*request));
2493         request->n_channels = n_channels;
2494         if (n_ssids)
2495                 request->ssids = (void *)(request->channels + n_channels);
2496         request->n_ssids = n_ssids;
2497         if (ie_len) {
2498                 if (request->ssids)
2499                         request->ie = (void *)(request->ssids + n_ssids);
2500                 else
2501                         request->ie = (void *)(request->channels + n_channels);
2502         }
2503
2504         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2505                 /* user specified, bail out if channel not found */
2506                 request->n_channels = n_channels;
2507                 i = 0;
2508                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2509                         request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2510                         if (!request->channels[i]) {
2511                                 err = -EINVAL;
2512                                 goto out_free;
2513                         }
2514                         i++;
2515                 }
2516         } else {
2517                 /* all channels */
2518                 i = 0;
2519                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2520                         int j;
2521                         if (!wiphy->bands[band])
2522                                 continue;
2523                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2524                                 request->channels[i] = &wiphy->bands[band]->channels[j];
2525                                 i++;
2526                         }
2527                 }
2528         }
2529
2530         i = 0;
2531         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2532                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2533                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2534                                 err = -EINVAL;
2535                                 goto out_free;
2536                         }
2537                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2538                         request->ssids[i].ssid_len = nla_len(attr);
2539                         i++;
2540                 }
2541         }
2542
2543         if (info->attrs[NL80211_ATTR_IE]) {
2544                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2545                 memcpy(request->ie, nla_data(info->attrs[NL80211_ATTR_IE]),
2546                        request->ie_len);
2547         }
2548
2549         request->ifidx = dev->ifindex;
2550         request->wiphy = &drv->wiphy;
2551
2552         drv->scan_req = request;
2553         err = drv->ops->scan(&drv->wiphy, dev, request);
2554
2555  out_free:
2556         if (err) {
2557                 drv->scan_req = NULL;
2558                 kfree(request);
2559         }
2560  out:
2561         cfg80211_put_dev(drv);
2562         dev_put(dev);
2563  out_rtnl:
2564         rtnl_unlock();
2565
2566         return err;
2567 }
2568
2569 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
2570                             struct cfg80211_registered_device *rdev,
2571                             struct net_device *dev,
2572                             struct cfg80211_bss *res)
2573 {
2574         void *hdr;
2575         struct nlattr *bss;
2576
2577         hdr = nl80211hdr_put(msg, pid, seq, flags,
2578                              NL80211_CMD_NEW_SCAN_RESULTS);
2579         if (!hdr)
2580                 return -1;
2581
2582         NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
2583                     rdev->bss_generation);
2584         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2585
2586         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
2587         if (!bss)
2588                 goto nla_put_failure;
2589         if (!is_zero_ether_addr(res->bssid))
2590                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
2591         if (res->information_elements && res->len_information_elements)
2592                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
2593                         res->len_information_elements,
2594                         res->information_elements);
2595         if (res->tsf)
2596                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
2597         if (res->beacon_interval)
2598                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
2599         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
2600         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
2601
2602         switch (rdev->wiphy.signal_type) {
2603         case CFG80211_SIGNAL_TYPE_MBM:
2604                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
2605                 break;
2606         case CFG80211_SIGNAL_TYPE_UNSPEC:
2607                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
2608                 break;
2609         default:
2610                 break;
2611         }
2612
2613         nla_nest_end(msg, bss);
2614
2615         return genlmsg_end(msg, hdr);
2616
2617  nla_put_failure:
2618         genlmsg_cancel(msg, hdr);
2619         return -EMSGSIZE;
2620 }
2621
2622 static int nl80211_dump_scan(struct sk_buff *skb,
2623                              struct netlink_callback *cb)
2624 {
2625         struct cfg80211_registered_device *dev;
2626         struct net_device *netdev;
2627         struct cfg80211_internal_bss *scan;
2628         int ifidx = cb->args[0];
2629         int start = cb->args[1], idx = 0;
2630         int err;
2631
2632         if (!ifidx) {
2633                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2634                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
2635                                   nl80211_policy);
2636                 if (err)
2637                         return err;
2638
2639                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2640                         return -EINVAL;
2641
2642                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2643                 if (!ifidx)
2644                         return -EINVAL;
2645                 cb->args[0] = ifidx;
2646         }
2647
2648         netdev = dev_get_by_index(&init_net, ifidx);
2649         if (!netdev)
2650                 return -ENODEV;
2651
2652         dev = cfg80211_get_dev_from_ifindex(ifidx);
2653         if (IS_ERR(dev)) {
2654                 err = PTR_ERR(dev);
2655                 goto out_put_netdev;
2656         }
2657
2658         spin_lock_bh(&dev->bss_lock);
2659         cfg80211_bss_expire(dev);
2660
2661         list_for_each_entry(scan, &dev->bss_list, list) {
2662                 if (++idx <= start)
2663                         continue;
2664                 if (nl80211_send_bss(skb,
2665                                 NETLINK_CB(cb->skb).pid,
2666                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2667                                 dev, netdev, &scan->pub) < 0) {
2668                         idx--;
2669                         goto out;
2670                 }
2671         }
2672
2673  out:
2674         spin_unlock_bh(&dev->bss_lock);
2675
2676         cb->args[1] = idx;
2677         err = skb->len;
2678         cfg80211_put_dev(dev);
2679  out_put_netdev:
2680         dev_put(netdev);
2681
2682         return err;
2683 }
2684
2685 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
2686 {
2687         return auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM ||
2688                 auth_type == NL80211_AUTHTYPE_SHARED_KEY ||
2689                 auth_type == NL80211_AUTHTYPE_FT ||
2690                 auth_type == NL80211_AUTHTYPE_NETWORK_EAP;
2691 }
2692
2693 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
2694 {
2695         struct cfg80211_registered_device *drv;
2696         struct net_device *dev;
2697         struct cfg80211_auth_request req;
2698         struct wiphy *wiphy;
2699         int err;
2700
2701         rtnl_lock();
2702
2703         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2704         if (err)
2705                 goto unlock_rtnl;
2706
2707         if (!drv->ops->auth) {
2708                 err = -EOPNOTSUPP;
2709                 goto out;
2710         }
2711
2712         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
2713                 err = -EOPNOTSUPP;
2714                 goto out;
2715         }
2716
2717         if (!netif_running(dev)) {
2718                 err = -ENETDOWN;
2719                 goto out;
2720         }
2721
2722         if (!info->attrs[NL80211_ATTR_MAC]) {
2723                 err = -EINVAL;
2724                 goto out;
2725         }
2726
2727         wiphy = &drv->wiphy;
2728         memset(&req, 0, sizeof(req));
2729
2730         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2731
2732         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2733                 req.chan = ieee80211_get_channel(
2734                         wiphy,
2735                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
2736                 if (!req.chan) {
2737                         err = -EINVAL;
2738                         goto out;
2739                 }
2740         }
2741
2742         if (info->attrs[NL80211_ATTR_SSID]) {
2743                 req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2744                 req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
2745         }
2746
2747         if (info->attrs[NL80211_ATTR_IE]) {
2748                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
2749                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2750         }
2751
2752         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2753                 req.auth_type =
2754                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
2755                 if (!nl80211_valid_auth_type(req.auth_type)) {
2756                         err = -EINVAL;
2757                         goto out;
2758                 }
2759         }
2760
2761         err = drv->ops->auth(&drv->wiphy, dev, &req);
2762
2763 out:
2764         cfg80211_put_dev(drv);
2765         dev_put(dev);
2766 unlock_rtnl:
2767         rtnl_unlock();
2768         return err;
2769 }
2770
2771 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
2772 {
2773         struct cfg80211_registered_device *drv;
2774         struct net_device *dev;
2775         struct cfg80211_assoc_request req;
2776         struct wiphy *wiphy;
2777         int err;
2778
2779         rtnl_lock();
2780
2781         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2782         if (err)
2783                 goto unlock_rtnl;
2784
2785         if (!drv->ops->assoc) {
2786                 err = -EOPNOTSUPP;
2787                 goto out;
2788         }
2789
2790         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
2791                 err = -EOPNOTSUPP;
2792                 goto out;
2793         }
2794
2795         if (!netif_running(dev)) {
2796                 err = -ENETDOWN;
2797                 goto out;
2798         }
2799
2800         if (!info->attrs[NL80211_ATTR_MAC] ||
2801             !info->attrs[NL80211_ATTR_SSID]) {
2802                 err = -EINVAL;
2803                 goto out;
2804         }
2805
2806         wiphy = &drv->wiphy;
2807         memset(&req, 0, sizeof(req));
2808
2809         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2810
2811         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2812                 req.chan = ieee80211_get_channel(
2813                         wiphy,
2814                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
2815                 if (!req.chan) {
2816                         err = -EINVAL;
2817                         goto out;
2818                 }
2819         }
2820
2821         req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2822         req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
2823
2824         if (info->attrs[NL80211_ATTR_IE]) {
2825                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
2826                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2827         }
2828
2829         err = drv->ops->assoc(&drv->wiphy, dev, &req);
2830
2831 out:
2832         cfg80211_put_dev(drv);
2833         dev_put(dev);
2834 unlock_rtnl:
2835         rtnl_unlock();
2836         return err;
2837 }
2838
2839 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
2840 {
2841         struct cfg80211_registered_device *drv;
2842         struct net_device *dev;
2843         struct cfg80211_deauth_request req;
2844         struct wiphy *wiphy;
2845         int err;
2846
2847         rtnl_lock();
2848
2849         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2850         if (err)
2851                 goto unlock_rtnl;
2852
2853         if (!drv->ops->deauth) {
2854                 err = -EOPNOTSUPP;
2855                 goto out;
2856         }
2857
2858         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
2859                 err = -EOPNOTSUPP;
2860                 goto out;
2861         }
2862
2863         if (!netif_running(dev)) {
2864                 err = -ENETDOWN;
2865                 goto out;
2866         }
2867
2868         if (!info->attrs[NL80211_ATTR_MAC]) {
2869                 err = -EINVAL;
2870                 goto out;
2871         }
2872
2873         wiphy = &drv->wiphy;
2874         memset(&req, 0, sizeof(req));
2875
2876         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2877
2878         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
2879                 req.reason_code =
2880                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
2881                 if (req.reason_code == 0) {
2882                         /* Reason Code 0 is reserved */
2883                         err = -EINVAL;
2884                         goto out;
2885                 }
2886         }
2887
2888         if (info->attrs[NL80211_ATTR_IE]) {
2889                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
2890                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2891         }
2892
2893         err = drv->ops->deauth(&drv->wiphy, dev, &req);
2894
2895 out:
2896         cfg80211_put_dev(drv);
2897         dev_put(dev);
2898 unlock_rtnl:
2899         rtnl_unlock();
2900         return err;
2901 }
2902
2903 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
2904 {
2905         struct cfg80211_registered_device *drv;
2906         struct net_device *dev;
2907         struct cfg80211_disassoc_request req;
2908         struct wiphy *wiphy;
2909         int err;
2910
2911         rtnl_lock();
2912
2913         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2914         if (err)
2915                 goto unlock_rtnl;
2916
2917         if (!drv->ops->disassoc) {
2918                 err = -EOPNOTSUPP;
2919                 goto out;
2920         }
2921
2922         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
2923                 err = -EOPNOTSUPP;
2924                 goto out;
2925         }
2926
2927         if (!netif_running(dev)) {
2928                 err = -ENETDOWN;
2929                 goto out;
2930         }
2931
2932         if (!info->attrs[NL80211_ATTR_MAC]) {
2933                 err = -EINVAL;
2934                 goto out;
2935         }
2936
2937         wiphy = &drv->wiphy;
2938         memset(&req, 0, sizeof(req));
2939
2940         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2941
2942         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
2943                 req.reason_code =
2944                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
2945                 if (req.reason_code == 0) {
2946                         /* Reason Code 0 is reserved */
2947                         err = -EINVAL;
2948                         goto out;
2949                 }
2950         }
2951
2952         if (info->attrs[NL80211_ATTR_IE]) {
2953                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
2954                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2955         }
2956
2957         err = drv->ops->disassoc(&drv->wiphy, dev, &req);
2958
2959 out:
2960         cfg80211_put_dev(drv);
2961         dev_put(dev);
2962 unlock_rtnl:
2963         rtnl_unlock();
2964         return err;
2965 }
2966
2967 static struct genl_ops nl80211_ops[] = {
2968         {
2969                 .cmd = NL80211_CMD_GET_WIPHY,
2970                 .doit = nl80211_get_wiphy,
2971                 .dumpit = nl80211_dump_wiphy,
2972                 .policy = nl80211_policy,
2973                 /* can be retrieved by unprivileged users */
2974         },
2975         {
2976                 .cmd = NL80211_CMD_SET_WIPHY,
2977                 .doit = nl80211_set_wiphy,
2978                 .policy = nl80211_policy,
2979                 .flags = GENL_ADMIN_PERM,
2980         },
2981         {
2982                 .cmd = NL80211_CMD_GET_INTERFACE,
2983                 .doit = nl80211_get_interface,
2984                 .dumpit = nl80211_dump_interface,
2985                 .policy = nl80211_policy,
2986                 /* can be retrieved by unprivileged users */
2987         },
2988         {
2989                 .cmd = NL80211_CMD_SET_INTERFACE,
2990                 .doit = nl80211_set_interface,
2991                 .policy = nl80211_policy,
2992                 .flags = GENL_ADMIN_PERM,
2993         },
2994         {
2995                 .cmd = NL80211_CMD_NEW_INTERFACE,
2996                 .doit = nl80211_new_interface,
2997                 .policy = nl80211_policy,
2998                 .flags = GENL_ADMIN_PERM,
2999         },
3000         {
3001                 .cmd = NL80211_CMD_DEL_INTERFACE,
3002                 .doit = nl80211_del_interface,
3003                 .policy = nl80211_policy,
3004                 .flags = GENL_ADMIN_PERM,
3005         },
3006         {
3007                 .cmd = NL80211_CMD_GET_KEY,
3008                 .doit = nl80211_get_key,
3009                 .policy = nl80211_policy,
3010                 .flags = GENL_ADMIN_PERM,
3011         },
3012         {
3013                 .cmd = NL80211_CMD_SET_KEY,
3014                 .doit = nl80211_set_key,
3015                 .policy = nl80211_policy,
3016                 .flags = GENL_ADMIN_PERM,
3017         },
3018         {
3019                 .cmd = NL80211_CMD_NEW_KEY,
3020                 .doit = nl80211_new_key,
3021                 .policy = nl80211_policy,
3022                 .flags = GENL_ADMIN_PERM,
3023         },
3024         {
3025                 .cmd = NL80211_CMD_DEL_KEY,
3026                 .doit = nl80211_del_key,
3027                 .policy = nl80211_policy,
3028                 .flags = GENL_ADMIN_PERM,
3029         },
3030         {
3031                 .cmd = NL80211_CMD_SET_BEACON,
3032                 .policy = nl80211_policy,
3033                 .flags = GENL_ADMIN_PERM,
3034                 .doit = nl80211_addset_beacon,
3035         },
3036         {
3037                 .cmd = NL80211_CMD_NEW_BEACON,
3038                 .policy = nl80211_policy,
3039                 .flags = GENL_ADMIN_PERM,
3040                 .doit = nl80211_addset_beacon,
3041         },
3042         {
3043                 .cmd = NL80211_CMD_DEL_BEACON,
3044                 .policy = nl80211_policy,
3045                 .flags = GENL_ADMIN_PERM,
3046                 .doit = nl80211_del_beacon,
3047         },
3048         {
3049                 .cmd = NL80211_CMD_GET_STATION,
3050                 .doit = nl80211_get_station,
3051                 .dumpit = nl80211_dump_station,
3052                 .policy = nl80211_policy,
3053         },
3054         {
3055                 .cmd = NL80211_CMD_SET_STATION,
3056                 .doit = nl80211_set_station,
3057                 .policy = nl80211_policy,
3058                 .flags = GENL_ADMIN_PERM,
3059         },
3060         {
3061                 .cmd = NL80211_CMD_NEW_STATION,
3062                 .doit = nl80211_new_station,
3063                 .policy = nl80211_policy,
3064                 .flags = GENL_ADMIN_PERM,
3065         },
3066         {
3067                 .cmd = NL80211_CMD_DEL_STATION,
3068                 .doit = nl80211_del_station,
3069                 .policy = nl80211_policy,
3070                 .flags = GENL_ADMIN_PERM,
3071         },
3072         {
3073                 .cmd = NL80211_CMD_GET_MPATH,
3074                 .doit = nl80211_get_mpath,
3075                 .dumpit = nl80211_dump_mpath,
3076                 .policy = nl80211_policy,
3077                 .flags = GENL_ADMIN_PERM,
3078         },
3079         {
3080                 .cmd = NL80211_CMD_SET_MPATH,
3081                 .doit = nl80211_set_mpath,
3082                 .policy = nl80211_policy,
3083                 .flags = GENL_ADMIN_PERM,
3084         },
3085         {
3086                 .cmd = NL80211_CMD_NEW_MPATH,
3087                 .doit = nl80211_new_mpath,
3088                 .policy = nl80211_policy,
3089                 .flags = GENL_ADMIN_PERM,
3090         },
3091         {
3092                 .cmd = NL80211_CMD_DEL_MPATH,
3093                 .doit = nl80211_del_mpath,
3094                 .policy = nl80211_policy,
3095                 .flags = GENL_ADMIN_PERM,
3096         },
3097         {
3098                 .cmd = NL80211_CMD_SET_BSS,
3099                 .doit = nl80211_set_bss,
3100                 .policy = nl80211_policy,
3101                 .flags = GENL_ADMIN_PERM,
3102         },
3103         {
3104                 .cmd = NL80211_CMD_GET_REG,
3105                 .doit = nl80211_get_reg,
3106                 .policy = nl80211_policy,
3107                 /* can be retrieved by unprivileged users */
3108         },
3109         {
3110                 .cmd = NL80211_CMD_SET_REG,
3111                 .doit = nl80211_set_reg,
3112                 .policy = nl80211_policy,
3113                 .flags = GENL_ADMIN_PERM,
3114         },
3115         {
3116                 .cmd = NL80211_CMD_REQ_SET_REG,
3117                 .doit = nl80211_req_set_reg,
3118                 .policy = nl80211_policy,
3119                 .flags = GENL_ADMIN_PERM,
3120         },
3121         {
3122                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
3123                 .doit = nl80211_get_mesh_params,
3124                 .policy = nl80211_policy,
3125                 /* can be retrieved by unprivileged users */
3126         },
3127         {
3128                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
3129                 .doit = nl80211_set_mesh_params,
3130                 .policy = nl80211_policy,
3131                 .flags = GENL_ADMIN_PERM,
3132         },
3133         {
3134                 .cmd = NL80211_CMD_TRIGGER_SCAN,
3135                 .doit = nl80211_trigger_scan,
3136                 .policy = nl80211_policy,
3137                 .flags = GENL_ADMIN_PERM,
3138         },
3139         {
3140                 .cmd = NL80211_CMD_GET_SCAN,
3141                 .policy = nl80211_policy,
3142                 .dumpit = nl80211_dump_scan,
3143         },
3144         {
3145                 .cmd = NL80211_CMD_AUTHENTICATE,
3146                 .doit = nl80211_authenticate,
3147                 .policy = nl80211_policy,
3148                 .flags = GENL_ADMIN_PERM,
3149         },
3150         {
3151                 .cmd = NL80211_CMD_ASSOCIATE,
3152                 .doit = nl80211_associate,
3153                 .policy = nl80211_policy,
3154                 .flags = GENL_ADMIN_PERM,
3155         },
3156         {
3157                 .cmd = NL80211_CMD_DEAUTHENTICATE,
3158                 .doit = nl80211_deauthenticate,
3159                 .policy = nl80211_policy,
3160                 .flags = GENL_ADMIN_PERM,
3161         },
3162         {
3163                 .cmd = NL80211_CMD_DISASSOCIATE,
3164                 .doit = nl80211_disassociate,
3165                 .policy = nl80211_policy,
3166                 .flags = GENL_ADMIN_PERM,
3167         },
3168 };
3169 static struct genl_multicast_group nl80211_mlme_mcgrp = {
3170         .name = "mlme",
3171 };
3172
3173 /* multicast groups */
3174 static struct genl_multicast_group nl80211_config_mcgrp = {
3175         .name = "config",
3176 };
3177 static struct genl_multicast_group nl80211_scan_mcgrp = {
3178         .name = "scan",
3179 };
3180 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
3181         .name = "regulatory",
3182 };
3183
3184 /* notification functions */
3185
3186 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
3187 {
3188         struct sk_buff *msg;
3189
3190         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3191         if (!msg)
3192                 return;
3193
3194         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
3195                 nlmsg_free(msg);
3196                 return;
3197         }
3198
3199         genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
3200 }
3201
3202 static int nl80211_send_scan_donemsg(struct sk_buff *msg,
3203                                     struct cfg80211_registered_device *rdev,
3204                                     struct net_device *netdev,
3205                                     u32 pid, u32 seq, int flags,
3206                                     u32 cmd)
3207 {
3208         void *hdr;
3209
3210         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
3211         if (!hdr)
3212                 return -1;
3213
3214         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3215         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3216
3217         /* XXX: we should probably bounce back the request? */
3218
3219         return genlmsg_end(msg, hdr);
3220
3221  nla_put_failure:
3222         genlmsg_cancel(msg, hdr);
3223         return -EMSGSIZE;
3224 }
3225
3226 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
3227                             struct net_device *netdev)
3228 {
3229         struct sk_buff *msg;
3230
3231         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3232         if (!msg)
3233                 return;
3234
3235         if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3236                                       NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
3237                 nlmsg_free(msg);
3238                 return;
3239         }
3240
3241         genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3242 }
3243
3244 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
3245                                struct net_device *netdev)
3246 {
3247         struct sk_buff *msg;
3248
3249         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3250         if (!msg)
3251                 return;
3252
3253         if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3254                                       NL80211_CMD_SCAN_ABORTED) < 0) {
3255                 nlmsg_free(msg);
3256                 return;
3257         }
3258
3259         genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3260 }
3261
3262 /*
3263  * This can happen on global regulatory changes or device specific settings
3264  * based on custom world regulatory domains.
3265  */
3266 void nl80211_send_reg_change_event(struct regulatory_request *request)
3267 {
3268         struct sk_buff *msg;
3269         void *hdr;
3270
3271         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3272         if (!msg)
3273                 return;
3274
3275         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
3276         if (!hdr) {
3277                 nlmsg_free(msg);
3278                 return;
3279         }
3280
3281         /* Userspace can always count this one always being set */
3282         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
3283
3284         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
3285                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3286                            NL80211_REGDOM_TYPE_WORLD);
3287         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
3288                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3289                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
3290         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
3291                  request->intersect)
3292                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3293                            NL80211_REGDOM_TYPE_INTERSECTION);
3294         else {
3295                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3296                            NL80211_REGDOM_TYPE_COUNTRY);
3297                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
3298         }
3299
3300         if (wiphy_idx_valid(request->wiphy_idx))
3301                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
3302
3303         if (genlmsg_end(msg, hdr) < 0) {
3304                 nlmsg_free(msg);
3305                 return;
3306         }
3307
3308         genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_KERNEL);
3309
3310         return;
3311
3312 nla_put_failure:
3313         genlmsg_cancel(msg, hdr);
3314         nlmsg_free(msg);
3315 }
3316
3317 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
3318                                     struct net_device *netdev,
3319                                     const u8 *buf, size_t len,
3320                                     enum nl80211_commands cmd)
3321 {
3322         struct sk_buff *msg;
3323         void *hdr;
3324
3325         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3326         if (!msg)
3327                 return;
3328
3329         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3330         if (!hdr) {
3331                 nlmsg_free(msg);
3332                 return;
3333         }
3334
3335         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3336         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3337         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
3338
3339         if (genlmsg_end(msg, hdr) < 0) {
3340                 nlmsg_free(msg);
3341                 return;
3342         }
3343
3344         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_KERNEL);
3345         return;
3346
3347  nla_put_failure:
3348         genlmsg_cancel(msg, hdr);
3349         nlmsg_free(msg);
3350 }
3351
3352 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
3353                           struct net_device *netdev, const u8 *buf, size_t len)
3354 {
3355         nl80211_send_mlme_event(rdev, netdev, buf, len,
3356                                 NL80211_CMD_AUTHENTICATE);
3357 }
3358
3359 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
3360                            struct net_device *netdev, const u8 *buf,
3361                            size_t len)
3362 {
3363         nl80211_send_mlme_event(rdev, netdev, buf, len, NL80211_CMD_ASSOCIATE);
3364 }
3365
3366 void nl80211_send_rx_deauth(struct cfg80211_registered_device *rdev,
3367                             struct net_device *netdev, const u8 *buf,
3368                             size_t len)
3369 {
3370         nl80211_send_mlme_event(rdev, netdev, buf, len,
3371                                 NL80211_CMD_DEAUTHENTICATE);
3372 }
3373
3374 void nl80211_send_rx_disassoc(struct cfg80211_registered_device *rdev,
3375                               struct net_device *netdev, const u8 *buf,
3376                               size_t len)
3377 {
3378         nl80211_send_mlme_event(rdev, netdev, buf, len,
3379                                 NL80211_CMD_DISASSOCIATE);
3380 }
3381
3382 /* initialisation/exit functions */
3383
3384 int nl80211_init(void)
3385 {
3386         int err, i;
3387
3388         err = genl_register_family(&nl80211_fam);
3389         if (err)
3390                 return err;
3391
3392         for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
3393                 err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
3394                 if (err)
3395                         goto err_out;
3396         }
3397
3398         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
3399         if (err)
3400                 goto err_out;
3401
3402         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
3403         if (err)
3404                 goto err_out;
3405
3406         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
3407         if (err)
3408                 goto err_out;
3409
3410         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
3411         if (err)
3412                 goto err_out;
3413
3414         return 0;
3415  err_out:
3416         genl_unregister_family(&nl80211_fam);
3417         return err;
3418 }
3419
3420 void nl80211_exit(void)
3421 {
3422         genl_unregister_family(&nl80211_fam);
3423 }