nl80211: report age of scan results
[linux-2.6.git] / net / wireless / nl80211.c
1 /*
2  * This is the new netlink-based wireless configuration interface.
3  *
4  * Copyright 2006-2009  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/net_namespace.h>
18 #include <net/genetlink.h>
19 #include <net/cfg80211.h>
20 #include <net/sock.h>
21 #include "core.h"
22 #include "nl80211.h"
23 #include "reg.h"
24
25 /* the netlink family */
26 static struct genl_family nl80211_fam = {
27         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
28         .name = "nl80211",      /* have users key off the name instead */
29         .hdrsize = 0,           /* no private header */
30         .version = 1,           /* no particular meaning now */
31         .maxattr = NL80211_ATTR_MAX,
32         .netnsok = true,
33 };
34
35 /* internal helper: get rdev and dev */
36 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
37                                        struct cfg80211_registered_device **rdev,
38                                        struct net_device **dev)
39 {
40         struct nlattr **attrs = info->attrs;
41         int ifindex;
42
43         if (!attrs[NL80211_ATTR_IFINDEX])
44                 return -EINVAL;
45
46         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
47         *dev = dev_get_by_index(genl_info_net(info), ifindex);
48         if (!*dev)
49                 return -ENODEV;
50
51         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
52         if (IS_ERR(*rdev)) {
53                 dev_put(*dev);
54                 return PTR_ERR(*rdev);
55         }
56
57         return 0;
58 }
59
60 /* policy for the attributes */
61 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
62         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
63         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
64                                       .len = 20-1 },
65         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
66         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
67         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
68         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
69         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
70         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
71         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
72
73         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
74         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
75         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
76
77         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
78         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
79
80         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
81         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
82                                     .len = WLAN_MAX_KEY_LEN },
83         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
84         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
85         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
86         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
87
88         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
89         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
90         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
91                                        .len = IEEE80211_MAX_DATA_LEN },
92         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
93                                        .len = IEEE80211_MAX_DATA_LEN },
94         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
95         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
96         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
97         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
98                                                .len = NL80211_MAX_SUPP_RATES },
99         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
100         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
101         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
102         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
103                                 .len = IEEE80211_MAX_MESH_ID_LEN },
104         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
105
106         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
107         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
108
109         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
110         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
111         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
112         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
113                                            .len = NL80211_MAX_SUPP_RATES },
114
115         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
116
117         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
118                                          .len = NL80211_HT_CAPABILITY_LEN },
119
120         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
121         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
122                               .len = IEEE80211_MAX_DATA_LEN },
123         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
124         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
125
126         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
127                                 .len = IEEE80211_MAX_SSID_LEN },
128         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
129         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
130         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
131         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
132         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
133         [NL80211_ATTR_STA_FLAGS2] = {
134                 .len = sizeof(struct nl80211_sta_flag_update),
135         },
136         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
137         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
138         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
139         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
140         [NL80211_ATTR_PID] = { .type = NLA_U32 },
141 };
142
143 /* policy for the attributes */
144 static struct nla_policy
145 nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
146         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
147         [NL80211_KEY_IDX] = { .type = NLA_U8 },
148         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
149         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
150         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
151         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
152 };
153
154 /* IE validation */
155 static bool is_valid_ie_attr(const struct nlattr *attr)
156 {
157         const u8 *pos;
158         int len;
159
160         if (!attr)
161                 return true;
162
163         pos = nla_data(attr);
164         len = nla_len(attr);
165
166         while (len) {
167                 u8 elemlen;
168
169                 if (len < 2)
170                         return false;
171                 len -= 2;
172
173                 elemlen = pos[1];
174                 if (elemlen > len)
175                         return false;
176
177                 len -= elemlen;
178                 pos += 2 + elemlen;
179         }
180
181         return true;
182 }
183
184 /* message building helper */
185 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
186                                    int flags, u8 cmd)
187 {
188         /* since there is no private header just add the generic one */
189         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
190 }
191
192 static int nl80211_msg_put_channel(struct sk_buff *msg,
193                                    struct ieee80211_channel *chan)
194 {
195         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
196                     chan->center_freq);
197
198         if (chan->flags & IEEE80211_CHAN_DISABLED)
199                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
200         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
201                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
202         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
203                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
204         if (chan->flags & IEEE80211_CHAN_RADAR)
205                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
206
207         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
208                     DBM_TO_MBM(chan->max_power));
209
210         return 0;
211
212  nla_put_failure:
213         return -ENOBUFS;
214 }
215
216 /* netlink command implementations */
217
218 struct key_parse {
219         struct key_params p;
220         int idx;
221         bool def, defmgmt;
222 };
223
224 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
225 {
226         struct nlattr *tb[NL80211_KEY_MAX + 1];
227         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
228                                    nl80211_key_policy);
229         if (err)
230                 return err;
231
232         k->def = !!tb[NL80211_KEY_DEFAULT];
233         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
234
235         if (tb[NL80211_KEY_IDX])
236                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
237
238         if (tb[NL80211_KEY_DATA]) {
239                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
240                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
241         }
242
243         if (tb[NL80211_KEY_SEQ]) {
244                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
245                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
246         }
247
248         if (tb[NL80211_KEY_CIPHER])
249                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
250
251         return 0;
252 }
253
254 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
255 {
256         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
257                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
258                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
259         }
260
261         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
262                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
263                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
264         }
265
266         if (info->attrs[NL80211_ATTR_KEY_IDX])
267                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
268
269         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
270                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
271
272         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
273         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
274
275         return 0;
276 }
277
278 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
279 {
280         int err;
281
282         memset(k, 0, sizeof(*k));
283         k->idx = -1;
284
285         if (info->attrs[NL80211_ATTR_KEY])
286                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
287         else
288                 err = nl80211_parse_key_old(info, k);
289
290         if (err)
291                 return err;
292
293         if (k->def && k->defmgmt)
294                 return -EINVAL;
295
296         if (k->idx != -1) {
297                 if (k->defmgmt) {
298                         if (k->idx < 4 || k->idx > 5)
299                                 return -EINVAL;
300                 } else if (k->def) {
301                         if (k->idx < 0 || k->idx > 3)
302                                 return -EINVAL;
303                 } else {
304                         if (k->idx < 0 || k->idx > 5)
305                                 return -EINVAL;
306                 }
307         }
308
309         return 0;
310 }
311
312 static struct cfg80211_cached_keys *
313 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
314                        struct nlattr *keys)
315 {
316         struct key_parse parse;
317         struct nlattr *key;
318         struct cfg80211_cached_keys *result;
319         int rem, err, def = 0;
320
321         result = kzalloc(sizeof(*result), GFP_KERNEL);
322         if (!result)
323                 return ERR_PTR(-ENOMEM);
324
325         result->def = -1;
326         result->defmgmt = -1;
327
328         nla_for_each_nested(key, keys, rem) {
329                 memset(&parse, 0, sizeof(parse));
330                 parse.idx = -1;
331
332                 err = nl80211_parse_key_new(key, &parse);
333                 if (err)
334                         goto error;
335                 err = -EINVAL;
336                 if (!parse.p.key)
337                         goto error;
338                 if (parse.idx < 0 || parse.idx > 4)
339                         goto error;
340                 if (parse.def) {
341                         if (def)
342                                 goto error;
343                         def = 1;
344                         result->def = parse.idx;
345                 } else if (parse.defmgmt)
346                         goto error;
347                 err = cfg80211_validate_key_settings(rdev, &parse.p,
348                                                      parse.idx, NULL);
349                 if (err)
350                         goto error;
351                 result->params[parse.idx].cipher = parse.p.cipher;
352                 result->params[parse.idx].key_len = parse.p.key_len;
353                 result->params[parse.idx].key = result->data[parse.idx];
354                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
355         }
356
357         return result;
358  error:
359         kfree(result);
360         return ERR_PTR(err);
361 }
362
363 static int nl80211_key_allowed(struct wireless_dev *wdev)
364 {
365         ASSERT_WDEV_LOCK(wdev);
366
367         if (!netif_running(wdev->netdev))
368                 return -ENETDOWN;
369
370         switch (wdev->iftype) {
371         case NL80211_IFTYPE_AP:
372         case NL80211_IFTYPE_AP_VLAN:
373                 break;
374         case NL80211_IFTYPE_ADHOC:
375                 if (!wdev->current_bss)
376                         return -ENOLINK;
377                 break;
378         case NL80211_IFTYPE_STATION:
379                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
380                         return -ENOLINK;
381                 break;
382         default:
383                 return -EINVAL;
384         }
385
386         return 0;
387 }
388
389 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
390                               struct cfg80211_registered_device *dev)
391 {
392         void *hdr;
393         struct nlattr *nl_bands, *nl_band;
394         struct nlattr *nl_freqs, *nl_freq;
395         struct nlattr *nl_rates, *nl_rate;
396         struct nlattr *nl_modes;
397         struct nlattr *nl_cmds;
398         enum ieee80211_band band;
399         struct ieee80211_channel *chan;
400         struct ieee80211_rate *rate;
401         int i;
402         u16 ifmodes = dev->wiphy.interface_modes;
403
404         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
405         if (!hdr)
406                 return -1;
407
408         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
409         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
410
411         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
412                     cfg80211_rdev_list_generation);
413
414         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
415                    dev->wiphy.retry_short);
416         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
417                    dev->wiphy.retry_long);
418         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
419                     dev->wiphy.frag_threshold);
420         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
421                     dev->wiphy.rts_threshold);
422
423         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
424                    dev->wiphy.max_scan_ssids);
425         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
426                     dev->wiphy.max_scan_ie_len);
427
428         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
429                 sizeof(u32) * dev->wiphy.n_cipher_suites,
430                 dev->wiphy.cipher_suites);
431
432         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
433         if (!nl_modes)
434                 goto nla_put_failure;
435
436         i = 0;
437         while (ifmodes) {
438                 if (ifmodes & 1)
439                         NLA_PUT_FLAG(msg, i);
440                 ifmodes >>= 1;
441                 i++;
442         }
443
444         nla_nest_end(msg, nl_modes);
445
446         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
447         if (!nl_bands)
448                 goto nla_put_failure;
449
450         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
451                 if (!dev->wiphy.bands[band])
452                         continue;
453
454                 nl_band = nla_nest_start(msg, band);
455                 if (!nl_band)
456                         goto nla_put_failure;
457
458                 /* add HT info */
459                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
460                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
461                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
462                                 &dev->wiphy.bands[band]->ht_cap.mcs);
463                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
464                                 dev->wiphy.bands[band]->ht_cap.cap);
465                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
466                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
467                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
468                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
469                 }
470
471                 /* add frequencies */
472                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
473                 if (!nl_freqs)
474                         goto nla_put_failure;
475
476                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
477                         nl_freq = nla_nest_start(msg, i);
478                         if (!nl_freq)
479                                 goto nla_put_failure;
480
481                         chan = &dev->wiphy.bands[band]->channels[i];
482
483                         if (nl80211_msg_put_channel(msg, chan))
484                                 goto nla_put_failure;
485
486                         nla_nest_end(msg, nl_freq);
487                 }
488
489                 nla_nest_end(msg, nl_freqs);
490
491                 /* add bitrates */
492                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
493                 if (!nl_rates)
494                         goto nla_put_failure;
495
496                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
497                         nl_rate = nla_nest_start(msg, i);
498                         if (!nl_rate)
499                                 goto nla_put_failure;
500
501                         rate = &dev->wiphy.bands[band]->bitrates[i];
502                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
503                                     rate->bitrate);
504                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
505                                 NLA_PUT_FLAG(msg,
506                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
507
508                         nla_nest_end(msg, nl_rate);
509                 }
510
511                 nla_nest_end(msg, nl_rates);
512
513                 nla_nest_end(msg, nl_band);
514         }
515         nla_nest_end(msg, nl_bands);
516
517         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
518         if (!nl_cmds)
519                 goto nla_put_failure;
520
521         i = 0;
522 #define CMD(op, n)                                              \
523          do {                                                   \
524                 if (dev->ops->op) {                             \
525                         i++;                                    \
526                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
527                 }                                               \
528         } while (0)
529
530         CMD(add_virtual_intf, NEW_INTERFACE);
531         CMD(change_virtual_intf, SET_INTERFACE);
532         CMD(add_key, NEW_KEY);
533         CMD(add_beacon, NEW_BEACON);
534         CMD(add_station, NEW_STATION);
535         CMD(add_mpath, NEW_MPATH);
536         CMD(set_mesh_params, SET_MESH_PARAMS);
537         CMD(change_bss, SET_BSS);
538         CMD(auth, AUTHENTICATE);
539         CMD(assoc, ASSOCIATE);
540         CMD(deauth, DEAUTHENTICATE);
541         CMD(disassoc, DISASSOCIATE);
542         CMD(join_ibss, JOIN_IBSS);
543         if (dev->wiphy.netnsok) {
544                 i++;
545                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
546         }
547
548 #undef CMD
549
550         if (dev->ops->connect || dev->ops->auth) {
551                 i++;
552                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
553         }
554
555         if (dev->ops->disconnect || dev->ops->deauth) {
556                 i++;
557                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
558         }
559
560         nla_nest_end(msg, nl_cmds);
561
562         return genlmsg_end(msg, hdr);
563
564  nla_put_failure:
565         genlmsg_cancel(msg, hdr);
566         return -EMSGSIZE;
567 }
568
569 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
570 {
571         int idx = 0;
572         int start = cb->args[0];
573         struct cfg80211_registered_device *dev;
574
575         mutex_lock(&cfg80211_mutex);
576         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
577                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
578                         continue;
579                 if (++idx <= start)
580                         continue;
581                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
582                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
583                                        dev) < 0) {
584                         idx--;
585                         break;
586                 }
587         }
588         mutex_unlock(&cfg80211_mutex);
589
590         cb->args[0] = idx;
591
592         return skb->len;
593 }
594
595 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
596 {
597         struct sk_buff *msg;
598         struct cfg80211_registered_device *dev;
599
600         dev = cfg80211_get_dev_from_info(info);
601         if (IS_ERR(dev))
602                 return PTR_ERR(dev);
603
604         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
605         if (!msg)
606                 goto out_err;
607
608         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
609                 goto out_free;
610
611         cfg80211_unlock_rdev(dev);
612
613         return genlmsg_reply(msg, info);
614
615  out_free:
616         nlmsg_free(msg);
617  out_err:
618         cfg80211_unlock_rdev(dev);
619         return -ENOBUFS;
620 }
621
622 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
623         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
624         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
625         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
626         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
627         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
628 };
629
630 static int parse_txq_params(struct nlattr *tb[],
631                             struct ieee80211_txq_params *txq_params)
632 {
633         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
634             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
635             !tb[NL80211_TXQ_ATTR_AIFS])
636                 return -EINVAL;
637
638         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
639         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
640         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
641         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
642         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
643
644         return 0;
645 }
646
647 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
648 {
649         struct cfg80211_registered_device *rdev;
650         int result = 0, rem_txq_params = 0;
651         struct nlattr *nl_txq_params;
652         u32 changed;
653         u8 retry_short = 0, retry_long = 0;
654         u32 frag_threshold = 0, rts_threshold = 0;
655
656         rtnl_lock();
657
658         mutex_lock(&cfg80211_mutex);
659
660         rdev = __cfg80211_rdev_from_info(info);
661         if (IS_ERR(rdev)) {
662                 mutex_unlock(&cfg80211_mutex);
663                 result = PTR_ERR(rdev);
664                 goto unlock;
665         }
666
667         mutex_lock(&rdev->mtx);
668
669         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
670                 result = cfg80211_dev_rename(
671                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
672
673         mutex_unlock(&cfg80211_mutex);
674
675         if (result)
676                 goto bad_res;
677
678         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
679                 struct ieee80211_txq_params txq_params;
680                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
681
682                 if (!rdev->ops->set_txq_params) {
683                         result = -EOPNOTSUPP;
684                         goto bad_res;
685                 }
686
687                 nla_for_each_nested(nl_txq_params,
688                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
689                                     rem_txq_params) {
690                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
691                                   nla_data(nl_txq_params),
692                                   nla_len(nl_txq_params),
693                                   txq_params_policy);
694                         result = parse_txq_params(tb, &txq_params);
695                         if (result)
696                                 goto bad_res;
697
698                         result = rdev->ops->set_txq_params(&rdev->wiphy,
699                                                            &txq_params);
700                         if (result)
701                                 goto bad_res;
702                 }
703         }
704
705         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
706                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
707                 u32 freq;
708
709                 result = -EINVAL;
710
711                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
712                         channel_type = nla_get_u32(info->attrs[
713                                            NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
714                         if (channel_type != NL80211_CHAN_NO_HT &&
715                             channel_type != NL80211_CHAN_HT20 &&
716                             channel_type != NL80211_CHAN_HT40PLUS &&
717                             channel_type != NL80211_CHAN_HT40MINUS)
718                                 goto bad_res;
719                 }
720
721                 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
722
723                 mutex_lock(&rdev->devlist_mtx);
724                 result = rdev_set_freq(rdev, NULL, freq, channel_type);
725                 mutex_unlock(&rdev->devlist_mtx);
726                 if (result)
727                         goto bad_res;
728         }
729
730         changed = 0;
731
732         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
733                 retry_short = nla_get_u8(
734                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
735                 if (retry_short == 0) {
736                         result = -EINVAL;
737                         goto bad_res;
738                 }
739                 changed |= WIPHY_PARAM_RETRY_SHORT;
740         }
741
742         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
743                 retry_long = nla_get_u8(
744                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
745                 if (retry_long == 0) {
746                         result = -EINVAL;
747                         goto bad_res;
748                 }
749                 changed |= WIPHY_PARAM_RETRY_LONG;
750         }
751
752         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
753                 frag_threshold = nla_get_u32(
754                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
755                 if (frag_threshold < 256) {
756                         result = -EINVAL;
757                         goto bad_res;
758                 }
759                 if (frag_threshold != (u32) -1) {
760                         /*
761                          * Fragments (apart from the last one) are required to
762                          * have even length. Make the fragmentation code
763                          * simpler by stripping LSB should someone try to use
764                          * odd threshold value.
765                          */
766                         frag_threshold &= ~0x1;
767                 }
768                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
769         }
770
771         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
772                 rts_threshold = nla_get_u32(
773                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
774                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
775         }
776
777         if (changed) {
778                 u8 old_retry_short, old_retry_long;
779                 u32 old_frag_threshold, old_rts_threshold;
780
781                 if (!rdev->ops->set_wiphy_params) {
782                         result = -EOPNOTSUPP;
783                         goto bad_res;
784                 }
785
786                 old_retry_short = rdev->wiphy.retry_short;
787                 old_retry_long = rdev->wiphy.retry_long;
788                 old_frag_threshold = rdev->wiphy.frag_threshold;
789                 old_rts_threshold = rdev->wiphy.rts_threshold;
790
791                 if (changed & WIPHY_PARAM_RETRY_SHORT)
792                         rdev->wiphy.retry_short = retry_short;
793                 if (changed & WIPHY_PARAM_RETRY_LONG)
794                         rdev->wiphy.retry_long = retry_long;
795                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
796                         rdev->wiphy.frag_threshold = frag_threshold;
797                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
798                         rdev->wiphy.rts_threshold = rts_threshold;
799
800                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
801                 if (result) {
802                         rdev->wiphy.retry_short = old_retry_short;
803                         rdev->wiphy.retry_long = old_retry_long;
804                         rdev->wiphy.frag_threshold = old_frag_threshold;
805                         rdev->wiphy.rts_threshold = old_rts_threshold;
806                 }
807         }
808
809  bad_res:
810         mutex_unlock(&rdev->mtx);
811  unlock:
812         rtnl_unlock();
813         return result;
814 }
815
816
817 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
818                               struct cfg80211_registered_device *rdev,
819                               struct net_device *dev)
820 {
821         void *hdr;
822
823         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
824         if (!hdr)
825                 return -1;
826
827         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
828         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
829         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
830         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
831
832         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
833                     rdev->devlist_generation ^
834                         (cfg80211_rdev_list_generation << 2));
835
836         return genlmsg_end(msg, hdr);
837
838  nla_put_failure:
839         genlmsg_cancel(msg, hdr);
840         return -EMSGSIZE;
841 }
842
843 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
844 {
845         int wp_idx = 0;
846         int if_idx = 0;
847         int wp_start = cb->args[0];
848         int if_start = cb->args[1];
849         struct cfg80211_registered_device *rdev;
850         struct wireless_dev *wdev;
851
852         mutex_lock(&cfg80211_mutex);
853         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
854                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
855                         continue;
856                 if (wp_idx < wp_start) {
857                         wp_idx++;
858                         continue;
859                 }
860                 if_idx = 0;
861
862                 mutex_lock(&rdev->devlist_mtx);
863                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
864                         if (if_idx < if_start) {
865                                 if_idx++;
866                                 continue;
867                         }
868                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
869                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
870                                                rdev, wdev->netdev) < 0) {
871                                 mutex_unlock(&rdev->devlist_mtx);
872                                 goto out;
873                         }
874                         if_idx++;
875                 }
876                 mutex_unlock(&rdev->devlist_mtx);
877
878                 wp_idx++;
879         }
880  out:
881         mutex_unlock(&cfg80211_mutex);
882
883         cb->args[0] = wp_idx;
884         cb->args[1] = if_idx;
885
886         return skb->len;
887 }
888
889 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
890 {
891         struct sk_buff *msg;
892         struct cfg80211_registered_device *dev;
893         struct net_device *netdev;
894         int err;
895
896         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
897         if (err)
898                 return err;
899
900         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
901         if (!msg)
902                 goto out_err;
903
904         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
905                                dev, netdev) < 0)
906                 goto out_free;
907
908         dev_put(netdev);
909         cfg80211_unlock_rdev(dev);
910
911         return genlmsg_reply(msg, info);
912
913  out_free:
914         nlmsg_free(msg);
915  out_err:
916         dev_put(netdev);
917         cfg80211_unlock_rdev(dev);
918         return -ENOBUFS;
919 }
920
921 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
922         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
923         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
924         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
925         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
926         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
927 };
928
929 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
930 {
931         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
932         int flag;
933
934         *mntrflags = 0;
935
936         if (!nla)
937                 return -EINVAL;
938
939         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
940                              nla, mntr_flags_policy))
941                 return -EINVAL;
942
943         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
944                 if (flags[flag])
945                         *mntrflags |= (1<<flag);
946
947         return 0;
948 }
949
950 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
951 {
952         struct cfg80211_registered_device *rdev;
953         struct vif_params params;
954         int err;
955         enum nl80211_iftype otype, ntype;
956         struct net_device *dev;
957         u32 _flags, *flags = NULL;
958         bool change = false;
959
960         memset(&params, 0, sizeof(params));
961
962         rtnl_lock();
963
964         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
965         if (err)
966                 goto unlock_rtnl;
967
968         otype = ntype = dev->ieee80211_ptr->iftype;
969
970         if (info->attrs[NL80211_ATTR_IFTYPE]) {
971                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
972                 if (otype != ntype)
973                         change = true;
974                 if (ntype > NL80211_IFTYPE_MAX) {
975                         err = -EINVAL;
976                         goto unlock;
977                 }
978         }
979
980         if (info->attrs[NL80211_ATTR_MESH_ID]) {
981                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
982                         err = -EINVAL;
983                         goto unlock;
984                 }
985                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
986                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
987                 change = true;
988         }
989
990         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
991                 if (ntype != NL80211_IFTYPE_MONITOR) {
992                         err = -EINVAL;
993                         goto unlock;
994                 }
995                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
996                                           &_flags);
997                 if (err)
998                         goto unlock;
999
1000                 flags = &_flags;
1001                 change = true;
1002         }
1003
1004         if (change)
1005                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1006         else
1007                 err = 0;
1008
1009  unlock:
1010         dev_put(dev);
1011         cfg80211_unlock_rdev(rdev);
1012  unlock_rtnl:
1013         rtnl_unlock();
1014         return err;
1015 }
1016
1017 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1018 {
1019         struct cfg80211_registered_device *rdev;
1020         struct vif_params params;
1021         int err;
1022         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1023         u32 flags;
1024
1025         memset(&params, 0, sizeof(params));
1026
1027         if (!info->attrs[NL80211_ATTR_IFNAME])
1028                 return -EINVAL;
1029
1030         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1031                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1032                 if (type > NL80211_IFTYPE_MAX)
1033                         return -EINVAL;
1034         }
1035
1036         rtnl_lock();
1037
1038         rdev = cfg80211_get_dev_from_info(info);
1039         if (IS_ERR(rdev)) {
1040                 err = PTR_ERR(rdev);
1041                 goto unlock_rtnl;
1042         }
1043
1044         if (!rdev->ops->add_virtual_intf ||
1045             !(rdev->wiphy.interface_modes & (1 << type))) {
1046                 err = -EOPNOTSUPP;
1047                 goto unlock;
1048         }
1049
1050         if (type == NL80211_IFTYPE_MESH_POINT &&
1051             info->attrs[NL80211_ATTR_MESH_ID]) {
1052                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1053                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1054         }
1055
1056         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1057                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1058                                   &flags);
1059         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1060                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1061                 type, err ? NULL : &flags, &params);
1062
1063  unlock:
1064         cfg80211_unlock_rdev(rdev);
1065  unlock_rtnl:
1066         rtnl_unlock();
1067         return err;
1068 }
1069
1070 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1071 {
1072         struct cfg80211_registered_device *rdev;
1073         int err;
1074         struct net_device *dev;
1075
1076         rtnl_lock();
1077
1078         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1079         if (err)
1080                 goto unlock_rtnl;
1081
1082         if (!rdev->ops->del_virtual_intf) {
1083                 err = -EOPNOTSUPP;
1084                 goto out;
1085         }
1086
1087         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1088
1089  out:
1090         cfg80211_unlock_rdev(rdev);
1091         dev_put(dev);
1092  unlock_rtnl:
1093         rtnl_unlock();
1094         return err;
1095 }
1096
1097 struct get_key_cookie {
1098         struct sk_buff *msg;
1099         int error;
1100         int idx;
1101 };
1102
1103 static void get_key_callback(void *c, struct key_params *params)
1104 {
1105         struct nlattr *key;
1106         struct get_key_cookie *cookie = c;
1107
1108         if (params->key)
1109                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1110                         params->key_len, params->key);
1111
1112         if (params->seq)
1113                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1114                         params->seq_len, params->seq);
1115
1116         if (params->cipher)
1117                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1118                             params->cipher);
1119
1120         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1121         if (!key)
1122                 goto nla_put_failure;
1123
1124         if (params->key)
1125                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1126                         params->key_len, params->key);
1127
1128         if (params->seq)
1129                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1130                         params->seq_len, params->seq);
1131
1132         if (params->cipher)
1133                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1134                             params->cipher);
1135
1136         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1137
1138         nla_nest_end(cookie->msg, key);
1139
1140         return;
1141  nla_put_failure:
1142         cookie->error = 1;
1143 }
1144
1145 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1146 {
1147         struct cfg80211_registered_device *rdev;
1148         int err;
1149         struct net_device *dev;
1150         u8 key_idx = 0;
1151         u8 *mac_addr = NULL;
1152         struct get_key_cookie cookie = {
1153                 .error = 0,
1154         };
1155         void *hdr;
1156         struct sk_buff *msg;
1157
1158         if (info->attrs[NL80211_ATTR_KEY_IDX])
1159                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1160
1161         if (key_idx > 5)
1162                 return -EINVAL;
1163
1164         if (info->attrs[NL80211_ATTR_MAC])
1165                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1166
1167         rtnl_lock();
1168
1169         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1170         if (err)
1171                 goto unlock_rtnl;
1172
1173         if (!rdev->ops->get_key) {
1174                 err = -EOPNOTSUPP;
1175                 goto out;
1176         }
1177
1178         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1179         if (!msg) {
1180                 err = -ENOMEM;
1181                 goto out;
1182         }
1183
1184         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1185                              NL80211_CMD_NEW_KEY);
1186
1187         if (IS_ERR(hdr)) {
1188                 err = PTR_ERR(hdr);
1189                 goto free_msg;
1190         }
1191
1192         cookie.msg = msg;
1193         cookie.idx = key_idx;
1194
1195         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1196         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1197         if (mac_addr)
1198                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1199
1200         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1201                                 &cookie, get_key_callback);
1202
1203         if (err)
1204                 goto free_msg;
1205
1206         if (cookie.error)
1207                 goto nla_put_failure;
1208
1209         genlmsg_end(msg, hdr);
1210         err = genlmsg_reply(msg, info);
1211         goto out;
1212
1213  nla_put_failure:
1214         err = -ENOBUFS;
1215  free_msg:
1216         nlmsg_free(msg);
1217  out:
1218         cfg80211_unlock_rdev(rdev);
1219         dev_put(dev);
1220  unlock_rtnl:
1221         rtnl_unlock();
1222
1223         return err;
1224 }
1225
1226 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1227 {
1228         struct cfg80211_registered_device *rdev;
1229         struct key_parse key;
1230         int err;
1231         struct net_device *dev;
1232         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1233                     u8 key_index);
1234
1235         err = nl80211_parse_key(info, &key);
1236         if (err)
1237                 return err;
1238
1239         if (key.idx < 0)
1240                 return -EINVAL;
1241
1242         /* only support setting default key */
1243         if (!key.def && !key.defmgmt)
1244                 return -EINVAL;
1245
1246         rtnl_lock();
1247
1248         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1249         if (err)
1250                 goto unlock_rtnl;
1251
1252         if (key.def)
1253                 func = rdev->ops->set_default_key;
1254         else
1255                 func = rdev->ops->set_default_mgmt_key;
1256
1257         if (!func) {
1258                 err = -EOPNOTSUPP;
1259                 goto out;
1260         }
1261
1262         wdev_lock(dev->ieee80211_ptr);
1263         err = nl80211_key_allowed(dev->ieee80211_ptr);
1264         if (!err)
1265                 err = func(&rdev->wiphy, dev, key.idx);
1266
1267 #ifdef CONFIG_WIRELESS_EXT
1268         if (!err) {
1269                 if (func == rdev->ops->set_default_key)
1270                         dev->ieee80211_ptr->wext.default_key = key.idx;
1271                 else
1272                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1273         }
1274 #endif
1275         wdev_unlock(dev->ieee80211_ptr);
1276
1277  out:
1278         cfg80211_unlock_rdev(rdev);
1279         dev_put(dev);
1280
1281  unlock_rtnl:
1282         rtnl_unlock();
1283
1284         return err;
1285 }
1286
1287 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1288 {
1289         struct cfg80211_registered_device *rdev;
1290         int err;
1291         struct net_device *dev;
1292         struct key_parse key;
1293         u8 *mac_addr = NULL;
1294
1295         err = nl80211_parse_key(info, &key);
1296         if (err)
1297                 return err;
1298
1299         if (!key.p.key)
1300                 return -EINVAL;
1301
1302         if (info->attrs[NL80211_ATTR_MAC])
1303                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1304
1305         rtnl_lock();
1306
1307         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1308         if (err)
1309                 goto unlock_rtnl;
1310
1311         if (!rdev->ops->add_key) {
1312                 err = -EOPNOTSUPP;
1313                 goto out;
1314         }
1315
1316         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1317                 err = -EINVAL;
1318                 goto out;
1319         }
1320
1321         wdev_lock(dev->ieee80211_ptr);
1322         err = nl80211_key_allowed(dev->ieee80211_ptr);
1323         if (!err)
1324                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1325                                          mac_addr, &key.p);
1326         wdev_unlock(dev->ieee80211_ptr);
1327
1328  out:
1329         cfg80211_unlock_rdev(rdev);
1330         dev_put(dev);
1331  unlock_rtnl:
1332         rtnl_unlock();
1333
1334         return err;
1335 }
1336
1337 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1338 {
1339         struct cfg80211_registered_device *rdev;
1340         int err;
1341         struct net_device *dev;
1342         u8 *mac_addr = NULL;
1343         struct key_parse key;
1344
1345         err = nl80211_parse_key(info, &key);
1346         if (err)
1347                 return err;
1348
1349         if (info->attrs[NL80211_ATTR_MAC])
1350                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1351
1352         rtnl_lock();
1353
1354         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1355         if (err)
1356                 goto unlock_rtnl;
1357
1358         if (!rdev->ops->del_key) {
1359                 err = -EOPNOTSUPP;
1360                 goto out;
1361         }
1362
1363         wdev_lock(dev->ieee80211_ptr);
1364         err = nl80211_key_allowed(dev->ieee80211_ptr);
1365         if (!err)
1366                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1367
1368 #ifdef CONFIG_WIRELESS_EXT
1369         if (!err) {
1370                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1371                         dev->ieee80211_ptr->wext.default_key = -1;
1372                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1373                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1374         }
1375 #endif
1376         wdev_unlock(dev->ieee80211_ptr);
1377
1378  out:
1379         cfg80211_unlock_rdev(rdev);
1380         dev_put(dev);
1381
1382  unlock_rtnl:
1383         rtnl_unlock();
1384
1385         return err;
1386 }
1387
1388 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1389 {
1390         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1391                     struct beacon_parameters *info);
1392         struct cfg80211_registered_device *rdev;
1393         int err;
1394         struct net_device *dev;
1395         struct beacon_parameters params;
1396         int haveinfo = 0;
1397
1398         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1399                 return -EINVAL;
1400
1401         rtnl_lock();
1402
1403         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1404         if (err)
1405                 goto unlock_rtnl;
1406
1407         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1408                 err = -EOPNOTSUPP;
1409                 goto out;
1410         }
1411
1412         switch (info->genlhdr->cmd) {
1413         case NL80211_CMD_NEW_BEACON:
1414                 /* these are required for NEW_BEACON */
1415                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1416                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1417                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1418                         err = -EINVAL;
1419                         goto out;
1420                 }
1421
1422                 call = rdev->ops->add_beacon;
1423                 break;
1424         case NL80211_CMD_SET_BEACON:
1425                 call = rdev->ops->set_beacon;
1426                 break;
1427         default:
1428                 WARN_ON(1);
1429                 err = -EOPNOTSUPP;
1430                 goto out;
1431         }
1432
1433         if (!call) {
1434                 err = -EOPNOTSUPP;
1435                 goto out;
1436         }
1437
1438         memset(&params, 0, sizeof(params));
1439
1440         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1441                 params.interval =
1442                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1443                 haveinfo = 1;
1444         }
1445
1446         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1447                 params.dtim_period =
1448                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1449                 haveinfo = 1;
1450         }
1451
1452         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1453                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1454                 params.head_len =
1455                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1456                 haveinfo = 1;
1457         }
1458
1459         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1460                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1461                 params.tail_len =
1462                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1463                 haveinfo = 1;
1464         }
1465
1466         if (!haveinfo) {
1467                 err = -EINVAL;
1468                 goto out;
1469         }
1470
1471         err = call(&rdev->wiphy, dev, &params);
1472
1473  out:
1474         cfg80211_unlock_rdev(rdev);
1475         dev_put(dev);
1476  unlock_rtnl:
1477         rtnl_unlock();
1478
1479         return err;
1480 }
1481
1482 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1483 {
1484         struct cfg80211_registered_device *rdev;
1485         int err;
1486         struct net_device *dev;
1487
1488         rtnl_lock();
1489
1490         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1491         if (err)
1492                 goto unlock_rtnl;
1493
1494         if (!rdev->ops->del_beacon) {
1495                 err = -EOPNOTSUPP;
1496                 goto out;
1497         }
1498
1499         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1500                 err = -EOPNOTSUPP;
1501                 goto out;
1502         }
1503         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1504
1505  out:
1506         cfg80211_unlock_rdev(rdev);
1507         dev_put(dev);
1508  unlock_rtnl:
1509         rtnl_unlock();
1510
1511         return err;
1512 }
1513
1514 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1515         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1516         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1517         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1518         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1519 };
1520
1521 static int parse_station_flags(struct genl_info *info,
1522                                struct station_parameters *params)
1523 {
1524         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1525         struct nlattr *nla;
1526         int flag;
1527
1528         /*
1529          * Try parsing the new attribute first so userspace
1530          * can specify both for older kernels.
1531          */
1532         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1533         if (nla) {
1534                 struct nl80211_sta_flag_update *sta_flags;
1535
1536                 sta_flags = nla_data(nla);
1537                 params->sta_flags_mask = sta_flags->mask;
1538                 params->sta_flags_set = sta_flags->set;
1539                 if ((params->sta_flags_mask |
1540                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1541                         return -EINVAL;
1542                 return 0;
1543         }
1544
1545         /* if present, parse the old attribute */
1546
1547         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1548         if (!nla)
1549                 return 0;
1550
1551         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1552                              nla, sta_flags_policy))
1553                 return -EINVAL;
1554
1555         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1556         params->sta_flags_mask &= ~1;
1557
1558         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1559                 if (flags[flag])
1560                         params->sta_flags_set |= (1<<flag);
1561
1562         return 0;
1563 }
1564
1565 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1566 {
1567         int modulation, streams, bitrate;
1568
1569         if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1570                 return rate->legacy;
1571
1572         /* the formula below does only work for MCS values smaller than 32 */
1573         if (rate->mcs >= 32)
1574                 return 0;
1575
1576         modulation = rate->mcs & 7;
1577         streams = (rate->mcs >> 3) + 1;
1578
1579         bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1580                         13500000 : 6500000;
1581
1582         if (modulation < 4)
1583                 bitrate *= (modulation + 1);
1584         else if (modulation == 4)
1585                 bitrate *= (modulation + 2);
1586         else
1587                 bitrate *= (modulation + 3);
1588
1589         bitrate *= streams;
1590
1591         if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1592                 bitrate = (bitrate / 9) * 10;
1593
1594         /* do NOT round down here */
1595         return (bitrate + 50000) / 100000;
1596 }
1597
1598 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1599                                 int flags, struct net_device *dev,
1600                                 u8 *mac_addr, struct station_info *sinfo)
1601 {
1602         void *hdr;
1603         struct nlattr *sinfoattr, *txrate;
1604         u16 bitrate;
1605
1606         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1607         if (!hdr)
1608                 return -1;
1609
1610         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1611         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1612
1613         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1614
1615         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1616         if (!sinfoattr)
1617                 goto nla_put_failure;
1618         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1619                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1620                             sinfo->inactive_time);
1621         if (sinfo->filled & STATION_INFO_RX_BYTES)
1622                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1623                             sinfo->rx_bytes);
1624         if (sinfo->filled & STATION_INFO_TX_BYTES)
1625                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1626                             sinfo->tx_bytes);
1627         if (sinfo->filled & STATION_INFO_LLID)
1628                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1629                             sinfo->llid);
1630         if (sinfo->filled & STATION_INFO_PLID)
1631                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1632                             sinfo->plid);
1633         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1634                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1635                             sinfo->plink_state);
1636         if (sinfo->filled & STATION_INFO_SIGNAL)
1637                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1638                            sinfo->signal);
1639         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1640                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1641                 if (!txrate)
1642                         goto nla_put_failure;
1643
1644                 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1645                 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1646                 if (bitrate > 0)
1647                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1648
1649                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1650                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1651                                     sinfo->txrate.mcs);
1652                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1653                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1654                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1655                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1656
1657                 nla_nest_end(msg, txrate);
1658         }
1659         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1660                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1661                             sinfo->rx_packets);
1662         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1663                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1664                             sinfo->tx_packets);
1665         nla_nest_end(msg, sinfoattr);
1666
1667         return genlmsg_end(msg, hdr);
1668
1669  nla_put_failure:
1670         genlmsg_cancel(msg, hdr);
1671         return -EMSGSIZE;
1672 }
1673
1674 static int nl80211_dump_station(struct sk_buff *skb,
1675                                 struct netlink_callback *cb)
1676 {
1677         struct station_info sinfo;
1678         struct cfg80211_registered_device *dev;
1679         struct net_device *netdev;
1680         u8 mac_addr[ETH_ALEN];
1681         int ifidx = cb->args[0];
1682         int sta_idx = cb->args[1];
1683         int err;
1684
1685         if (!ifidx) {
1686                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1687                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1688                                   nl80211_policy);
1689                 if (err)
1690                         return err;
1691
1692                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1693                         return -EINVAL;
1694
1695                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1696                 if (!ifidx)
1697                         return -EINVAL;
1698         }
1699
1700         rtnl_lock();
1701
1702         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1703         if (!netdev) {
1704                 err = -ENODEV;
1705                 goto out_rtnl;
1706         }
1707
1708         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1709         if (IS_ERR(dev)) {
1710                 err = PTR_ERR(dev);
1711                 goto out_rtnl;
1712         }
1713
1714         if (!dev->ops->dump_station) {
1715                 err = -EOPNOTSUPP;
1716                 goto out_err;
1717         }
1718
1719         while (1) {
1720                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1721                                              mac_addr, &sinfo);
1722                 if (err == -ENOENT)
1723                         break;
1724                 if (err)
1725                         goto out_err;
1726
1727                 if (nl80211_send_station(skb,
1728                                 NETLINK_CB(cb->skb).pid,
1729                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1730                                 netdev, mac_addr,
1731                                 &sinfo) < 0)
1732                         goto out;
1733
1734                 sta_idx++;
1735         }
1736
1737
1738  out:
1739         cb->args[1] = sta_idx;
1740         err = skb->len;
1741  out_err:
1742         cfg80211_unlock_rdev(dev);
1743  out_rtnl:
1744         rtnl_unlock();
1745
1746         return err;
1747 }
1748
1749 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1750 {
1751         struct cfg80211_registered_device *rdev;
1752         int err;
1753         struct net_device *dev;
1754         struct station_info sinfo;
1755         struct sk_buff *msg;
1756         u8 *mac_addr = NULL;
1757
1758         memset(&sinfo, 0, sizeof(sinfo));
1759
1760         if (!info->attrs[NL80211_ATTR_MAC])
1761                 return -EINVAL;
1762
1763         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1764
1765         rtnl_lock();
1766
1767         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1768         if (err)
1769                 goto out_rtnl;
1770
1771         if (!rdev->ops->get_station) {
1772                 err = -EOPNOTSUPP;
1773                 goto out;
1774         }
1775
1776         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1777         if (err)
1778                 goto out;
1779
1780         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1781         if (!msg)
1782                 goto out;
1783
1784         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1785                                  dev, mac_addr, &sinfo) < 0)
1786                 goto out_free;
1787
1788         err = genlmsg_reply(msg, info);
1789         goto out;
1790
1791  out_free:
1792         nlmsg_free(msg);
1793  out:
1794         cfg80211_unlock_rdev(rdev);
1795         dev_put(dev);
1796  out_rtnl:
1797         rtnl_unlock();
1798
1799         return err;
1800 }
1801
1802 /*
1803  * Get vlan interface making sure it is on the right wiphy.
1804  */
1805 static int get_vlan(struct genl_info *info,
1806                     struct cfg80211_registered_device *rdev,
1807                     struct net_device **vlan)
1808 {
1809         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1810         *vlan = NULL;
1811
1812         if (vlanattr) {
1813                 *vlan = dev_get_by_index(genl_info_net(info),
1814                                          nla_get_u32(vlanattr));
1815                 if (!*vlan)
1816                         return -ENODEV;
1817                 if (!(*vlan)->ieee80211_ptr)
1818                         return -EINVAL;
1819                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1820                         return -EINVAL;
1821         }
1822         return 0;
1823 }
1824
1825 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1826 {
1827         struct cfg80211_registered_device *rdev;
1828         int err;
1829         struct net_device *dev;
1830         struct station_parameters params;
1831         u8 *mac_addr = NULL;
1832
1833         memset(&params, 0, sizeof(params));
1834
1835         params.listen_interval = -1;
1836
1837         if (info->attrs[NL80211_ATTR_STA_AID])
1838                 return -EINVAL;
1839
1840         if (!info->attrs[NL80211_ATTR_MAC])
1841                 return -EINVAL;
1842
1843         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1844
1845         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1846                 params.supported_rates =
1847                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1848                 params.supported_rates_len =
1849                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1850         }
1851
1852         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1853                 params.listen_interval =
1854                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1855
1856         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1857                 params.ht_capa =
1858                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1859
1860         if (parse_station_flags(info, &params))
1861                 return -EINVAL;
1862
1863         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1864                 params.plink_action =
1865                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1866
1867         rtnl_lock();
1868
1869         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1870         if (err)
1871                 goto out_rtnl;
1872
1873         err = get_vlan(info, rdev, &params.vlan);
1874         if (err)
1875                 goto out;
1876
1877         /* validate settings */
1878         err = 0;
1879
1880         switch (dev->ieee80211_ptr->iftype) {
1881         case NL80211_IFTYPE_AP:
1882         case NL80211_IFTYPE_AP_VLAN:
1883                 /* disallow mesh-specific things */
1884                 if (params.plink_action)
1885                         err = -EINVAL;
1886                 break;
1887         case NL80211_IFTYPE_STATION:
1888                 /* disallow everything but AUTHORIZED flag */
1889                 if (params.plink_action)
1890                         err = -EINVAL;
1891                 if (params.vlan)
1892                         err = -EINVAL;
1893                 if (params.supported_rates)
1894                         err = -EINVAL;
1895                 if (params.ht_capa)
1896                         err = -EINVAL;
1897                 if (params.listen_interval >= 0)
1898                         err = -EINVAL;
1899                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1900                         err = -EINVAL;
1901                 break;
1902         case NL80211_IFTYPE_MESH_POINT:
1903                 /* disallow things mesh doesn't support */
1904                 if (params.vlan)
1905                         err = -EINVAL;
1906                 if (params.ht_capa)
1907                         err = -EINVAL;
1908                 if (params.listen_interval >= 0)
1909                         err = -EINVAL;
1910                 if (params.supported_rates)
1911                         err = -EINVAL;
1912                 if (params.sta_flags_mask)
1913                         err = -EINVAL;
1914                 break;
1915         default:
1916                 err = -EINVAL;
1917         }
1918
1919         if (err)
1920                 goto out;
1921
1922         if (!rdev->ops->change_station) {
1923                 err = -EOPNOTSUPP;
1924                 goto out;
1925         }
1926
1927         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1928
1929  out:
1930         if (params.vlan)
1931                 dev_put(params.vlan);
1932         cfg80211_unlock_rdev(rdev);
1933         dev_put(dev);
1934  out_rtnl:
1935         rtnl_unlock();
1936
1937         return err;
1938 }
1939
1940 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1941 {
1942         struct cfg80211_registered_device *rdev;
1943         int err;
1944         struct net_device *dev;
1945         struct station_parameters params;
1946         u8 *mac_addr = NULL;
1947
1948         memset(&params, 0, sizeof(params));
1949
1950         if (!info->attrs[NL80211_ATTR_MAC])
1951                 return -EINVAL;
1952
1953         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1954                 return -EINVAL;
1955
1956         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1957                 return -EINVAL;
1958
1959         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1960         params.supported_rates =
1961                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1962         params.supported_rates_len =
1963                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1964         params.listen_interval =
1965                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1966
1967         if (info->attrs[NL80211_ATTR_STA_AID]) {
1968                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1969                 if (!params.aid || params.aid > IEEE80211_MAX_AID)
1970                         return -EINVAL;
1971         }
1972
1973         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1974                 params.ht_capa =
1975                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1976
1977         if (parse_station_flags(info, &params))
1978                 return -EINVAL;
1979
1980         rtnl_lock();
1981
1982         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1983         if (err)
1984                 goto out_rtnl;
1985
1986         err = get_vlan(info, rdev, &params.vlan);
1987         if (err)
1988                 goto out;
1989
1990         /* validate settings */
1991         err = 0;
1992
1993         switch (dev->ieee80211_ptr->iftype) {
1994         case NL80211_IFTYPE_AP:
1995         case NL80211_IFTYPE_AP_VLAN:
1996                 /* all ok but must have AID */
1997                 if (!params.aid)
1998                         err = -EINVAL;
1999                 break;
2000         case NL80211_IFTYPE_MESH_POINT:
2001                 /* disallow things mesh doesn't support */
2002                 if (params.vlan)
2003                         err = -EINVAL;
2004                 if (params.aid)
2005                         err = -EINVAL;
2006                 if (params.ht_capa)
2007                         err = -EINVAL;
2008                 if (params.listen_interval >= 0)
2009                         err = -EINVAL;
2010                 if (params.supported_rates)
2011                         err = -EINVAL;
2012                 if (params.sta_flags_mask)
2013                         err = -EINVAL;
2014                 break;
2015         default:
2016                 err = -EINVAL;
2017         }
2018
2019         if (err)
2020                 goto out;
2021
2022         if (!rdev->ops->add_station) {
2023                 err = -EOPNOTSUPP;
2024                 goto out;
2025         }
2026
2027         if (!netif_running(dev)) {
2028                 err = -ENETDOWN;
2029                 goto out;
2030         }
2031
2032         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2033
2034  out:
2035         if (params.vlan)
2036                 dev_put(params.vlan);
2037         cfg80211_unlock_rdev(rdev);
2038         dev_put(dev);
2039  out_rtnl:
2040         rtnl_unlock();
2041
2042         return err;
2043 }
2044
2045 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2046 {
2047         struct cfg80211_registered_device *rdev;
2048         int err;
2049         struct net_device *dev;
2050         u8 *mac_addr = NULL;
2051
2052         if (info->attrs[NL80211_ATTR_MAC])
2053                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2054
2055         rtnl_lock();
2056
2057         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2058         if (err)
2059                 goto out_rtnl;
2060
2061         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2062             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2063             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2064                 err = -EINVAL;
2065                 goto out;
2066         }
2067
2068         if (!rdev->ops->del_station) {
2069                 err = -EOPNOTSUPP;
2070                 goto out;
2071         }
2072
2073         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2074
2075  out:
2076         cfg80211_unlock_rdev(rdev);
2077         dev_put(dev);
2078  out_rtnl:
2079         rtnl_unlock();
2080
2081         return err;
2082 }
2083
2084 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2085                                 int flags, struct net_device *dev,
2086                                 u8 *dst, u8 *next_hop,
2087                                 struct mpath_info *pinfo)
2088 {
2089         void *hdr;
2090         struct nlattr *pinfoattr;
2091
2092         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2093         if (!hdr)
2094                 return -1;
2095
2096         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2097         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2098         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2099
2100         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2101
2102         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2103         if (!pinfoattr)
2104                 goto nla_put_failure;
2105         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2106                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2107                             pinfo->frame_qlen);
2108         if (pinfo->filled & MPATH_INFO_DSN)
2109                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
2110                             pinfo->dsn);
2111         if (pinfo->filled & MPATH_INFO_METRIC)
2112                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2113                             pinfo->metric);
2114         if (pinfo->filled & MPATH_INFO_EXPTIME)
2115                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2116                             pinfo->exptime);
2117         if (pinfo->filled & MPATH_INFO_FLAGS)
2118                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2119                             pinfo->flags);
2120         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2121                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2122                             pinfo->discovery_timeout);
2123         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2124                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2125                             pinfo->discovery_retries);
2126
2127         nla_nest_end(msg, pinfoattr);
2128
2129         return genlmsg_end(msg, hdr);
2130
2131  nla_put_failure:
2132         genlmsg_cancel(msg, hdr);
2133         return -EMSGSIZE;
2134 }
2135
2136 static int nl80211_dump_mpath(struct sk_buff *skb,
2137                               struct netlink_callback *cb)
2138 {
2139         struct mpath_info pinfo;
2140         struct cfg80211_registered_device *dev;
2141         struct net_device *netdev;
2142         u8 dst[ETH_ALEN];
2143         u8 next_hop[ETH_ALEN];
2144         int ifidx = cb->args[0];
2145         int path_idx = cb->args[1];
2146         int err;
2147
2148         if (!ifidx) {
2149                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2150                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
2151                                   nl80211_policy);
2152                 if (err)
2153                         return err;
2154
2155                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2156                         return -EINVAL;
2157
2158                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2159                 if (!ifidx)
2160                         return -EINVAL;
2161         }
2162
2163         rtnl_lock();
2164
2165         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2166         if (!netdev) {
2167                 err = -ENODEV;
2168                 goto out_rtnl;
2169         }
2170
2171         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2172         if (IS_ERR(dev)) {
2173                 err = PTR_ERR(dev);
2174                 goto out_rtnl;
2175         }
2176
2177         if (!dev->ops->dump_mpath) {
2178                 err = -EOPNOTSUPP;
2179                 goto out_err;
2180         }
2181
2182         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2183                 err = -EOPNOTSUPP;
2184                 goto out_err;
2185         }
2186
2187         while (1) {
2188                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2189                                            dst, next_hop, &pinfo);
2190                 if (err == -ENOENT)
2191                         break;
2192                 if (err)
2193                         goto out_err;
2194
2195                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2196                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2197                                        netdev, dst, next_hop,
2198                                        &pinfo) < 0)
2199                         goto out;
2200
2201                 path_idx++;
2202         }
2203
2204
2205  out:
2206         cb->args[1] = path_idx;
2207         err = skb->len;
2208  out_err:
2209         cfg80211_unlock_rdev(dev);
2210  out_rtnl:
2211         rtnl_unlock();
2212
2213         return err;
2214 }
2215
2216 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2217 {
2218         struct cfg80211_registered_device *rdev;
2219         int err;
2220         struct net_device *dev;
2221         struct mpath_info pinfo;
2222         struct sk_buff *msg;
2223         u8 *dst = NULL;
2224         u8 next_hop[ETH_ALEN];
2225
2226         memset(&pinfo, 0, sizeof(pinfo));
2227
2228         if (!info->attrs[NL80211_ATTR_MAC])
2229                 return -EINVAL;
2230
2231         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2232
2233         rtnl_lock();
2234
2235         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2236         if (err)
2237                 goto out_rtnl;
2238
2239         if (!rdev->ops->get_mpath) {
2240                 err = -EOPNOTSUPP;
2241                 goto out;
2242         }
2243
2244         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2245                 err = -EOPNOTSUPP;
2246                 goto out;
2247         }
2248
2249         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2250         if (err)
2251                 goto out;
2252
2253         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2254         if (!msg)
2255                 goto out;
2256
2257         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2258                                  dev, dst, next_hop, &pinfo) < 0)
2259                 goto out_free;
2260
2261         err = genlmsg_reply(msg, info);
2262         goto out;
2263
2264  out_free:
2265         nlmsg_free(msg);
2266  out:
2267         cfg80211_unlock_rdev(rdev);
2268         dev_put(dev);
2269  out_rtnl:
2270         rtnl_unlock();
2271
2272         return err;
2273 }
2274
2275 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2276 {
2277         struct cfg80211_registered_device *rdev;
2278         int err;
2279         struct net_device *dev;
2280         u8 *dst = NULL;
2281         u8 *next_hop = NULL;
2282
2283         if (!info->attrs[NL80211_ATTR_MAC])
2284                 return -EINVAL;
2285
2286         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2287                 return -EINVAL;
2288
2289         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2290         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2291
2292         rtnl_lock();
2293
2294         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2295         if (err)
2296                 goto out_rtnl;
2297
2298         if (!rdev->ops->change_mpath) {
2299                 err = -EOPNOTSUPP;
2300                 goto out;
2301         }
2302
2303         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2304                 err = -EOPNOTSUPP;
2305                 goto out;
2306         }
2307
2308         if (!netif_running(dev)) {
2309                 err = -ENETDOWN;
2310                 goto out;
2311         }
2312
2313         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2314
2315  out:
2316         cfg80211_unlock_rdev(rdev);
2317         dev_put(dev);
2318  out_rtnl:
2319         rtnl_unlock();
2320
2321         return err;
2322 }
2323 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2324 {
2325         struct cfg80211_registered_device *rdev;
2326         int err;
2327         struct net_device *dev;
2328         u8 *dst = NULL;
2329         u8 *next_hop = NULL;
2330
2331         if (!info->attrs[NL80211_ATTR_MAC])
2332                 return -EINVAL;
2333
2334         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2335                 return -EINVAL;
2336
2337         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2338         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2339
2340         rtnl_lock();
2341
2342         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2343         if (err)
2344                 goto out_rtnl;
2345
2346         if (!rdev->ops->add_mpath) {
2347                 err = -EOPNOTSUPP;
2348                 goto out;
2349         }
2350
2351         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2352                 err = -EOPNOTSUPP;
2353                 goto out;
2354         }
2355
2356         if (!netif_running(dev)) {
2357                 err = -ENETDOWN;
2358                 goto out;
2359         }
2360
2361         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2362
2363  out:
2364         cfg80211_unlock_rdev(rdev);
2365         dev_put(dev);
2366  out_rtnl:
2367         rtnl_unlock();
2368
2369         return err;
2370 }
2371
2372 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2373 {
2374         struct cfg80211_registered_device *rdev;
2375         int err;
2376         struct net_device *dev;
2377         u8 *dst = NULL;
2378
2379         if (info->attrs[NL80211_ATTR_MAC])
2380                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2381
2382         rtnl_lock();
2383
2384         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2385         if (err)
2386                 goto out_rtnl;
2387
2388         if (!rdev->ops->del_mpath) {
2389                 err = -EOPNOTSUPP;
2390                 goto out;
2391         }
2392
2393         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2394
2395  out:
2396         cfg80211_unlock_rdev(rdev);
2397         dev_put(dev);
2398  out_rtnl:
2399         rtnl_unlock();
2400
2401         return err;
2402 }
2403
2404 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2405 {
2406         struct cfg80211_registered_device *rdev;
2407         int err;
2408         struct net_device *dev;
2409         struct bss_parameters params;
2410
2411         memset(&params, 0, sizeof(params));
2412         /* default to not changing parameters */
2413         params.use_cts_prot = -1;
2414         params.use_short_preamble = -1;
2415         params.use_short_slot_time = -1;
2416
2417         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2418                 params.use_cts_prot =
2419                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2420         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2421                 params.use_short_preamble =
2422                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2423         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2424                 params.use_short_slot_time =
2425                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2426         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2427                 params.basic_rates =
2428                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2429                 params.basic_rates_len =
2430                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2431         }
2432
2433         rtnl_lock();
2434
2435         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2436         if (err)
2437                 goto out_rtnl;
2438
2439         if (!rdev->ops->change_bss) {
2440                 err = -EOPNOTSUPP;
2441                 goto out;
2442         }
2443
2444         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2445                 err = -EOPNOTSUPP;
2446                 goto out;
2447         }
2448
2449         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2450
2451  out:
2452         cfg80211_unlock_rdev(rdev);
2453         dev_put(dev);
2454  out_rtnl:
2455         rtnl_unlock();
2456
2457         return err;
2458 }
2459
2460 static const struct nla_policy
2461         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2462         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2463         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2464         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2465         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2466         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2467         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2468 };
2469
2470 static int parse_reg_rule(struct nlattr *tb[],
2471         struct ieee80211_reg_rule *reg_rule)
2472 {
2473         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2474         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2475
2476         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2477                 return -EINVAL;
2478         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2479                 return -EINVAL;
2480         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2481                 return -EINVAL;
2482         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2483                 return -EINVAL;
2484         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2485                 return -EINVAL;
2486
2487         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2488
2489         freq_range->start_freq_khz =
2490                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2491         freq_range->end_freq_khz =
2492                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2493         freq_range->max_bandwidth_khz =
2494                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2495
2496         power_rule->max_eirp =
2497                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2498
2499         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2500                 power_rule->max_antenna_gain =
2501                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2502
2503         return 0;
2504 }
2505
2506 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2507 {
2508         int r;
2509         char *data = NULL;
2510
2511         /*
2512          * You should only get this when cfg80211 hasn't yet initialized
2513          * completely when built-in to the kernel right between the time
2514          * window between nl80211_init() and regulatory_init(), if that is
2515          * even possible.
2516          */
2517         mutex_lock(&cfg80211_mutex);
2518         if (unlikely(!cfg80211_regdomain)) {
2519                 mutex_unlock(&cfg80211_mutex);
2520                 return -EINPROGRESS;
2521         }
2522         mutex_unlock(&cfg80211_mutex);
2523
2524         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2525                 return -EINVAL;
2526
2527         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2528
2529 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2530         /* We ignore world regdom requests with the old regdom setup */
2531         if (is_world_regdom(data))
2532                 return -EINVAL;
2533 #endif
2534
2535         r = regulatory_hint_user(data);
2536
2537         return r;
2538 }
2539
2540 static int nl80211_get_mesh_params(struct sk_buff *skb,
2541         struct genl_info *info)
2542 {
2543         struct cfg80211_registered_device *rdev;
2544         struct mesh_config cur_params;
2545         int err;
2546         struct net_device *dev;
2547         void *hdr;
2548         struct nlattr *pinfoattr;
2549         struct sk_buff *msg;
2550
2551         rtnl_lock();
2552
2553         /* Look up our device */
2554         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2555         if (err)
2556                 goto out_rtnl;
2557
2558         if (!rdev->ops->get_mesh_params) {
2559                 err = -EOPNOTSUPP;
2560                 goto out;
2561         }
2562
2563         /* Get the mesh params */
2564         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2565         if (err)
2566                 goto out;
2567
2568         /* Draw up a netlink message to send back */
2569         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2570         if (!msg) {
2571                 err = -ENOBUFS;
2572                 goto out;
2573         }
2574         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2575                              NL80211_CMD_GET_MESH_PARAMS);
2576         if (!hdr)
2577                 goto nla_put_failure;
2578         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2579         if (!pinfoattr)
2580                 goto nla_put_failure;
2581         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2582         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2583                         cur_params.dot11MeshRetryTimeout);
2584         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2585                         cur_params.dot11MeshConfirmTimeout);
2586         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2587                         cur_params.dot11MeshHoldingTimeout);
2588         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2589                         cur_params.dot11MeshMaxPeerLinks);
2590         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2591                         cur_params.dot11MeshMaxRetries);
2592         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2593                         cur_params.dot11MeshTTL);
2594         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2595                         cur_params.auto_open_plinks);
2596         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2597                         cur_params.dot11MeshHWMPmaxPREQretries);
2598         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2599                         cur_params.path_refresh_time);
2600         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2601                         cur_params.min_discovery_timeout);
2602         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2603                         cur_params.dot11MeshHWMPactivePathTimeout);
2604         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2605                         cur_params.dot11MeshHWMPpreqMinInterval);
2606         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2607                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2608         nla_nest_end(msg, pinfoattr);
2609         genlmsg_end(msg, hdr);
2610         err = genlmsg_reply(msg, info);
2611         goto out;
2612
2613  nla_put_failure:
2614         genlmsg_cancel(msg, hdr);
2615         err = -EMSGSIZE;
2616  out:
2617         /* Cleanup */
2618         cfg80211_unlock_rdev(rdev);
2619         dev_put(dev);
2620  out_rtnl:
2621         rtnl_unlock();
2622
2623         return err;
2624 }
2625
2626 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2627 do {\
2628         if (table[attr_num]) {\
2629                 cfg.param = nla_fn(table[attr_num]); \
2630                 mask |= (1 << (attr_num - 1)); \
2631         } \
2632 } while (0);\
2633
2634 static struct nla_policy
2635 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2636         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2637         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2638         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2639         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2640         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2641         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2642         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2643
2644         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2645         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2646         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2647         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2648         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2649         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2650 };
2651
2652 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2653 {
2654         int err;
2655         u32 mask;
2656         struct cfg80211_registered_device *rdev;
2657         struct net_device *dev;
2658         struct mesh_config cfg;
2659         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2660         struct nlattr *parent_attr;
2661
2662         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2663         if (!parent_attr)
2664                 return -EINVAL;
2665         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2666                         parent_attr, nl80211_meshconf_params_policy))
2667                 return -EINVAL;
2668
2669         rtnl_lock();
2670
2671         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2672         if (err)
2673                 goto out_rtnl;
2674
2675         if (!rdev->ops->set_mesh_params) {
2676                 err = -EOPNOTSUPP;
2677                 goto out;
2678         }
2679
2680         /* This makes sure that there aren't more than 32 mesh config
2681          * parameters (otherwise our bitfield scheme would not work.) */
2682         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2683
2684         /* Fill in the params struct */
2685         mask = 0;
2686         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2687                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2688         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2689                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2690         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2691                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2692         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2693                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2694         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2695                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2696         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2697                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2698         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2699                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2700         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2701                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2702                         nla_get_u8);
2703         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2704                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2705         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2706                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2707                         nla_get_u16);
2708         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2709                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2710                         nla_get_u32);
2711         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2712                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2713                         nla_get_u16);
2714         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2715                         dot11MeshHWMPnetDiameterTraversalTime,
2716                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2717                         nla_get_u16);
2718
2719         /* Apply changes */
2720         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2721
2722  out:
2723         /* cleanup */
2724         cfg80211_unlock_rdev(rdev);
2725         dev_put(dev);
2726  out_rtnl:
2727         rtnl_unlock();
2728
2729         return err;
2730 }
2731
2732 #undef FILL_IN_MESH_PARAM_IF_SET
2733
2734 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2735 {
2736         struct sk_buff *msg;
2737         void *hdr = NULL;
2738         struct nlattr *nl_reg_rules;
2739         unsigned int i;
2740         int err = -EINVAL;
2741
2742         mutex_lock(&cfg80211_mutex);
2743
2744         if (!cfg80211_regdomain)
2745                 goto out;
2746
2747         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2748         if (!msg) {
2749                 err = -ENOBUFS;
2750                 goto out;
2751         }
2752
2753         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2754                              NL80211_CMD_GET_REG);
2755         if (!hdr)
2756                 goto nla_put_failure;
2757
2758         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2759                 cfg80211_regdomain->alpha2);
2760
2761         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2762         if (!nl_reg_rules)
2763                 goto nla_put_failure;
2764
2765         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2766                 struct nlattr *nl_reg_rule;
2767                 const struct ieee80211_reg_rule *reg_rule;
2768                 const struct ieee80211_freq_range *freq_range;
2769                 const struct ieee80211_power_rule *power_rule;
2770
2771                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2772                 freq_range = &reg_rule->freq_range;
2773                 power_rule = &reg_rule->power_rule;
2774
2775                 nl_reg_rule = nla_nest_start(msg, i);
2776                 if (!nl_reg_rule)
2777                         goto nla_put_failure;
2778
2779                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2780                         reg_rule->flags);
2781                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2782                         freq_range->start_freq_khz);
2783                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2784                         freq_range->end_freq_khz);
2785                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2786                         freq_range->max_bandwidth_khz);
2787                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2788                         power_rule->max_antenna_gain);
2789                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2790                         power_rule->max_eirp);
2791
2792                 nla_nest_end(msg, nl_reg_rule);
2793         }
2794
2795         nla_nest_end(msg, nl_reg_rules);
2796
2797         genlmsg_end(msg, hdr);
2798         err = genlmsg_reply(msg, info);
2799         goto out;
2800
2801 nla_put_failure:
2802         genlmsg_cancel(msg, hdr);
2803         err = -EMSGSIZE;
2804 out:
2805         mutex_unlock(&cfg80211_mutex);
2806         return err;
2807 }
2808
2809 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2810 {
2811         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2812         struct nlattr *nl_reg_rule;
2813         char *alpha2 = NULL;
2814         int rem_reg_rules = 0, r = 0;
2815         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2816         struct ieee80211_regdomain *rd = NULL;
2817
2818         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2819                 return -EINVAL;
2820
2821         if (!info->attrs[NL80211_ATTR_REG_RULES])
2822                 return -EINVAL;
2823
2824         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2825
2826         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2827                         rem_reg_rules) {
2828                 num_rules++;
2829                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2830                         return -EINVAL;
2831         }
2832
2833         mutex_lock(&cfg80211_mutex);
2834
2835         if (!reg_is_valid_request(alpha2)) {
2836                 r = -EINVAL;
2837                 goto bad_reg;
2838         }
2839
2840         size_of_regd = sizeof(struct ieee80211_regdomain) +
2841                 (num_rules * sizeof(struct ieee80211_reg_rule));
2842
2843         rd = kzalloc(size_of_regd, GFP_KERNEL);
2844         if (!rd) {
2845                 r = -ENOMEM;
2846                 goto bad_reg;
2847         }
2848
2849         rd->n_reg_rules = num_rules;
2850         rd->alpha2[0] = alpha2[0];
2851         rd->alpha2[1] = alpha2[1];
2852
2853         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2854                         rem_reg_rules) {
2855                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2856                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2857                         reg_rule_policy);
2858                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2859                 if (r)
2860                         goto bad_reg;
2861
2862                 rule_idx++;
2863
2864                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2865                         r = -EINVAL;
2866                         goto bad_reg;
2867                 }
2868         }
2869
2870         BUG_ON(rule_idx != num_rules);
2871
2872         r = set_regdom(rd);
2873
2874         mutex_unlock(&cfg80211_mutex);
2875
2876         return r;
2877
2878  bad_reg:
2879         mutex_unlock(&cfg80211_mutex);
2880         kfree(rd);
2881         return r;
2882 }
2883
2884 static int validate_scan_freqs(struct nlattr *freqs)
2885 {
2886         struct nlattr *attr1, *attr2;
2887         int n_channels = 0, tmp1, tmp2;
2888
2889         nla_for_each_nested(attr1, freqs, tmp1) {
2890                 n_channels++;
2891                 /*
2892                  * Some hardware has a limited channel list for
2893                  * scanning, and it is pretty much nonsensical
2894                  * to scan for a channel twice, so disallow that
2895                  * and don't require drivers to check that the
2896                  * channel list they get isn't longer than what
2897                  * they can scan, as long as they can scan all
2898                  * the channels they registered at once.
2899                  */
2900                 nla_for_each_nested(attr2, freqs, tmp2)
2901                         if (attr1 != attr2 &&
2902                             nla_get_u32(attr1) == nla_get_u32(attr2))
2903                                 return 0;
2904         }
2905
2906         return n_channels;
2907 }
2908
2909 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2910 {
2911         struct cfg80211_registered_device *rdev;
2912         struct net_device *dev;
2913         struct cfg80211_scan_request *request;
2914         struct cfg80211_ssid *ssid;
2915         struct ieee80211_channel *channel;
2916         struct nlattr *attr;
2917         struct wiphy *wiphy;
2918         int err, tmp, n_ssids = 0, n_channels, i;
2919         enum ieee80211_band band;
2920         size_t ie_len;
2921
2922         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2923                 return -EINVAL;
2924
2925         rtnl_lock();
2926
2927         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2928         if (err)
2929                 goto out_rtnl;
2930
2931         wiphy = &rdev->wiphy;
2932
2933         if (!rdev->ops->scan) {
2934                 err = -EOPNOTSUPP;
2935                 goto out;
2936         }
2937
2938         if (!netif_running(dev)) {
2939                 err = -ENETDOWN;
2940                 goto out;
2941         }
2942
2943         if (rdev->scan_req) {
2944                 err = -EBUSY;
2945                 goto out;
2946         }
2947
2948         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2949                 n_channels = validate_scan_freqs(
2950                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2951                 if (!n_channels) {
2952                         err = -EINVAL;
2953                         goto out;
2954                 }
2955         } else {
2956                 n_channels = 0;
2957
2958                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2959                         if (wiphy->bands[band])
2960                                 n_channels += wiphy->bands[band]->n_channels;
2961         }
2962
2963         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2964                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2965                         n_ssids++;
2966
2967         if (n_ssids > wiphy->max_scan_ssids) {
2968                 err = -EINVAL;
2969                 goto out;
2970         }
2971
2972         if (info->attrs[NL80211_ATTR_IE])
2973                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2974         else
2975                 ie_len = 0;
2976
2977         if (ie_len > wiphy->max_scan_ie_len) {
2978                 err = -EINVAL;
2979                 goto out;
2980         }
2981
2982         request = kzalloc(sizeof(*request)
2983                         + sizeof(*ssid) * n_ssids
2984                         + sizeof(channel) * n_channels
2985                         + ie_len, GFP_KERNEL);
2986         if (!request) {
2987                 err = -ENOMEM;
2988                 goto out;
2989         }
2990
2991         request->n_channels = n_channels;
2992         if (n_ssids)
2993                 request->ssids = (void *)&request->channels[n_channels];
2994         request->n_ssids = n_ssids;
2995         if (ie_len) {
2996                 if (request->ssids)
2997                         request->ie = (void *)(request->ssids + n_ssids);
2998                 else
2999                         request->ie = (void *)(request->channels + n_channels);
3000         }
3001
3002         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3003                 /* user specified, bail out if channel not found */
3004                 request->n_channels = n_channels;
3005                 i = 0;
3006                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3007                         request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3008                         if (!request->channels[i]) {
3009                                 err = -EINVAL;
3010                                 goto out_free;
3011                         }
3012                         i++;
3013                 }
3014         } else {
3015                 /* all channels */
3016                 i = 0;
3017                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3018                         int j;
3019                         if (!wiphy->bands[band])
3020                                 continue;
3021                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3022                                 request->channels[i] = &wiphy->bands[band]->channels[j];
3023                                 i++;
3024                         }
3025                 }
3026         }
3027
3028         i = 0;
3029         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3030                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3031                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3032                                 err = -EINVAL;
3033                                 goto out_free;
3034                         }
3035                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3036                         request->ssids[i].ssid_len = nla_len(attr);
3037                         i++;
3038                 }
3039         }
3040
3041         if (info->attrs[NL80211_ATTR_IE]) {
3042                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3043                 memcpy((void *)request->ie,
3044                        nla_data(info->attrs[NL80211_ATTR_IE]),
3045                        request->ie_len);
3046         }
3047
3048         request->dev = dev;
3049         request->wiphy = &rdev->wiphy;
3050
3051         rdev->scan_req = request;
3052         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3053
3054         if (!err) {
3055                 nl80211_send_scan_start(rdev, dev);
3056                 dev_hold(dev);
3057         }
3058
3059  out_free:
3060         if (err) {
3061                 rdev->scan_req = NULL;
3062                 kfree(request);
3063         }
3064  out:
3065         cfg80211_unlock_rdev(rdev);
3066         dev_put(dev);
3067  out_rtnl:
3068         rtnl_unlock();
3069
3070         return err;
3071 }
3072
3073 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3074                             struct cfg80211_registered_device *rdev,
3075                             struct wireless_dev *wdev,
3076                             struct cfg80211_internal_bss *intbss)
3077 {
3078         struct cfg80211_bss *res = &intbss->pub;
3079         void *hdr;
3080         struct nlattr *bss;
3081         int i;
3082
3083         ASSERT_WDEV_LOCK(wdev);
3084
3085         hdr = nl80211hdr_put(msg, pid, seq, flags,
3086                              NL80211_CMD_NEW_SCAN_RESULTS);
3087         if (!hdr)
3088                 return -1;
3089
3090         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3091         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3092
3093         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3094         if (!bss)
3095                 goto nla_put_failure;
3096         if (!is_zero_ether_addr(res->bssid))
3097                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3098         if (res->information_elements && res->len_information_elements)
3099                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3100                         res->len_information_elements,
3101                         res->information_elements);
3102         if (res->tsf)
3103                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3104         if (res->beacon_interval)
3105                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3106         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3107         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3108         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3109                 jiffies_to_msecs(jiffies - intbss->ts));
3110
3111         switch (rdev->wiphy.signal_type) {
3112         case CFG80211_SIGNAL_TYPE_MBM:
3113                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3114                 break;
3115         case CFG80211_SIGNAL_TYPE_UNSPEC:
3116                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3117                 break;
3118         default:
3119                 break;
3120         }
3121
3122         switch (wdev->iftype) {
3123         case NL80211_IFTYPE_STATION:
3124                 if (intbss == wdev->current_bss)
3125                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3126                                     NL80211_BSS_STATUS_ASSOCIATED);
3127                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3128                         if (intbss != wdev->auth_bsses[i])
3129                                 continue;
3130                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3131                                     NL80211_BSS_STATUS_AUTHENTICATED);
3132                         break;
3133                 }
3134                 break;
3135         case NL80211_IFTYPE_ADHOC:
3136                 if (intbss == wdev->current_bss)
3137                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3138                                     NL80211_BSS_STATUS_IBSS_JOINED);
3139                 break;
3140         default:
3141                 break;
3142         }
3143
3144         nla_nest_end(msg, bss);
3145
3146         return genlmsg_end(msg, hdr);
3147
3148  nla_put_failure:
3149         genlmsg_cancel(msg, hdr);
3150         return -EMSGSIZE;
3151 }
3152
3153 static int nl80211_dump_scan(struct sk_buff *skb,
3154                              struct netlink_callback *cb)
3155 {
3156         struct cfg80211_registered_device *rdev;
3157         struct net_device *dev;
3158         struct cfg80211_internal_bss *scan;
3159         struct wireless_dev *wdev;
3160         int ifidx = cb->args[0];
3161         int start = cb->args[1], idx = 0;
3162         int err;
3163
3164         if (!ifidx) {
3165                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
3166                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
3167                                   nl80211_policy);
3168                 if (err)
3169                         return err;
3170
3171                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
3172                         return -EINVAL;
3173
3174                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
3175                 if (!ifidx)
3176                         return -EINVAL;
3177                 cb->args[0] = ifidx;
3178         }
3179
3180         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3181         if (!dev)
3182                 return -ENODEV;
3183
3184         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3185         if (IS_ERR(rdev)) {
3186                 err = PTR_ERR(rdev);
3187                 goto out_put_netdev;
3188         }
3189
3190         wdev = dev->ieee80211_ptr;
3191
3192         wdev_lock(wdev);
3193         spin_lock_bh(&rdev->bss_lock);
3194         cfg80211_bss_expire(rdev);
3195
3196         list_for_each_entry(scan, &rdev->bss_list, list) {
3197                 if (++idx <= start)
3198                         continue;
3199                 if (nl80211_send_bss(skb,
3200                                 NETLINK_CB(cb->skb).pid,
3201                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3202                                 rdev, wdev, scan) < 0) {
3203                         idx--;
3204                         goto out;
3205                 }
3206         }
3207
3208  out:
3209         spin_unlock_bh(&rdev->bss_lock);
3210         wdev_unlock(wdev);
3211
3212         cb->args[1] = idx;
3213         err = skb->len;
3214         cfg80211_unlock_rdev(rdev);
3215  out_put_netdev:
3216         dev_put(dev);
3217
3218         return err;
3219 }
3220
3221 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3222 {
3223         return auth_type <= NL80211_AUTHTYPE_MAX;
3224 }
3225
3226 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3227 {
3228         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3229                                   NL80211_WPA_VERSION_2));
3230 }
3231
3232 static bool nl80211_valid_akm_suite(u32 akm)
3233 {
3234         return akm == WLAN_AKM_SUITE_8021X ||
3235                 akm == WLAN_AKM_SUITE_PSK;
3236 }
3237
3238 static bool nl80211_valid_cipher_suite(u32 cipher)
3239 {
3240         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3241                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3242                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3243                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3244                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3245 }
3246
3247
3248 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3249 {
3250         struct cfg80211_registered_device *rdev;
3251         struct net_device *dev;
3252         struct ieee80211_channel *chan;
3253         const u8 *bssid, *ssid, *ie = NULL;
3254         int err, ssid_len, ie_len = 0;
3255         enum nl80211_auth_type auth_type;
3256         struct key_parse key;
3257
3258         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3259                 return -EINVAL;
3260
3261         if (!info->attrs[NL80211_ATTR_MAC])
3262                 return -EINVAL;
3263
3264         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3265                 return -EINVAL;
3266
3267         if (!info->attrs[NL80211_ATTR_SSID])
3268                 return -EINVAL;
3269
3270         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3271                 return -EINVAL;
3272
3273         err = nl80211_parse_key(info, &key);
3274         if (err)
3275                 return err;
3276
3277         if (key.idx >= 0) {
3278                 if (!key.p.key || !key.p.key_len)
3279                         return -EINVAL;
3280                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3281                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3282                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3283                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3284                         return -EINVAL;
3285                 if (key.idx > 4)
3286                         return -EINVAL;
3287         } else {
3288                 key.p.key_len = 0;
3289                 key.p.key = NULL;
3290         }
3291
3292         rtnl_lock();
3293
3294         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3295         if (err)
3296                 goto unlock_rtnl;
3297
3298         if (!rdev->ops->auth) {
3299                 err = -EOPNOTSUPP;
3300                 goto out;
3301         }
3302
3303         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3304                 err = -EOPNOTSUPP;
3305                 goto out;
3306         }
3307
3308         if (!netif_running(dev)) {
3309                 err = -ENETDOWN;
3310                 goto out;
3311         }
3312
3313         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3314         chan = ieee80211_get_channel(&rdev->wiphy,
3315                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3316         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3317                 err = -EINVAL;
3318                 goto out;
3319         }
3320
3321         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3322         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3323
3324         if (info->attrs[NL80211_ATTR_IE]) {
3325                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3326                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3327         }
3328
3329         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3330         if (!nl80211_valid_auth_type(auth_type)) {
3331                 err = -EINVAL;
3332                 goto out;
3333         }
3334
3335         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3336                                  ssid, ssid_len, ie, ie_len,
3337                                  key.p.key, key.p.key_len, key.idx);
3338
3339 out:
3340         cfg80211_unlock_rdev(rdev);
3341         dev_put(dev);
3342 unlock_rtnl:
3343         rtnl_unlock();
3344         return err;
3345 }
3346
3347 static int nl80211_crypto_settings(struct genl_info *info,
3348                                    struct cfg80211_crypto_settings *settings,
3349                                    int cipher_limit)
3350 {
3351         memset(settings, 0, sizeof(*settings));
3352
3353         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3354
3355         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3356                 void *data;
3357                 int len, i;
3358
3359                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3360                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3361                 settings->n_ciphers_pairwise = len / sizeof(u32);
3362
3363                 if (len % sizeof(u32))
3364                         return -EINVAL;
3365
3366                 if (settings->n_ciphers_pairwise > cipher_limit)
3367                         return -EINVAL;
3368
3369                 memcpy(settings->ciphers_pairwise, data, len);
3370
3371                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3372                         if (!nl80211_valid_cipher_suite(
3373                                         settings->ciphers_pairwise[i]))
3374                                 return -EINVAL;
3375         }
3376
3377         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3378                 settings->cipher_group =
3379                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3380                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3381                         return -EINVAL;
3382         }
3383
3384         if (info->attrs[NL80