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mmc: sh_mmcif: Convert extern inline to static inline.
[linux-2.6/btrfs-unstable.git] / net / wireless / nl80211.c
blobc506241f863706426e76d66736d0258eda34d769
1 /*
2 * This is the new netlink-based wireless configuration interface.
3 *
4 * Copyright 2006-2010 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/slab.h>
11 #include <linux/list.h>
12 #include <linux/if_ether.h>
13 #include <linux/ieee80211.h>
14 #include <linux/nl80211.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/netlink.h>
17 #include <linux/etherdevice.h>
18 #include <net/net_namespace.h>
19 #include <net/genetlink.h>
20 #include <net/cfg80211.h>
21 #include <net/sock.h>
22 #include "core.h"
23 #include "nl80211.h"
24 #include "reg.h"
25
26 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
27 struct genl_info *info);
28 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
29 struct genl_info *info);
30
31 /* the netlink family */
32 static struct genl_family nl80211_fam = {
33 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
34 .name = "nl80211", /* have users key off the name instead */
35 .hdrsize = 0, /* no private header */
36 .version = 1, /* no particular meaning now */
37 .maxattr = NL80211_ATTR_MAX,
38 .netnsok = true,
39 .pre_doit = nl80211_pre_doit,
40 .post_doit = nl80211_post_doit,
41 };
42
43 /* internal helper: get rdev and dev */
44 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
45 struct cfg80211_registered_device **rdev,
46 struct net_device **dev)
47 {
48 struct nlattr **attrs = info->attrs;
49 int ifindex;
50
51 if (!attrs[NL80211_ATTR_IFINDEX])
52 return -EINVAL;
53
54 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
55 *dev = dev_get_by_index(genl_info_net(info), ifindex);
56 if (!*dev)
57 return -ENODEV;
58
59 *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
60 if (IS_ERR(*rdev)) {
61 dev_put(*dev);
62 return PTR_ERR(*rdev);
63 }
64
65 return 0;
66 }
67
68 /* policy for the attributes */
69 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
70 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
71 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
72 .len = 20-1 },
73 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
74 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
75 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
76 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
77 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
78 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
79 [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
80 [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
81
82 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
83 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
84 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
85
86 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
87 [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
88
89 [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
90 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
91 .len = WLAN_MAX_KEY_LEN },
92 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
93 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
94 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
95 [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
96 [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
97
98 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
99 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
100 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
101 .len = IEEE80211_MAX_DATA_LEN },
102 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
103 .len = IEEE80211_MAX_DATA_LEN },
104 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
105 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
106 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
107 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
108 .len = NL80211_MAX_SUPP_RATES },
109 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
110 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
111 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
112 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
113 .len = IEEE80211_MAX_MESH_ID_LEN },
114 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
115
116 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
117 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
118
119 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
120 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
121 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
122 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
123 .len = NL80211_MAX_SUPP_RATES },
124
125 [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
126
127 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
128 .len = NL80211_HT_CAPABILITY_LEN },
129
130 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
131 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
132 .len = IEEE80211_MAX_DATA_LEN },
133 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
134 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
135
136 [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
137 .len = IEEE80211_MAX_SSID_LEN },
138 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
139 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
140 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
141 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
142 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
143 [NL80211_ATTR_STA_FLAGS2] = {
144 .len = sizeof(struct nl80211_sta_flag_update),
145 },
146 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
147 [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
148 [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
149 [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
150 [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
151 [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
152 [NL80211_ATTR_PID] = { .type = NLA_U32 },
153 [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
154 [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
155 .len = WLAN_PMKID_LEN },
156 [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
157 [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
158 [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
159 [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
160 .len = IEEE80211_MAX_DATA_LEN },
161 [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
162 [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
163 [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
164 [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
165 [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
166
167 [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
168 [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
169 [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
170 };
171
172 /* policy for the key attributes */
173 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
174 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
175 [NL80211_KEY_IDX] = { .type = NLA_U8 },
176 [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
177 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
178 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
179 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
180 [NL80211_KEY_TYPE] = { .type = NLA_U32 },
181 };
182
183 /* ifidx get helper */
184 static int nl80211_get_ifidx(struct netlink_callback *cb)
185 {
186 int res;
187
188 res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
189 nl80211_fam.attrbuf, nl80211_fam.maxattr,
190 nl80211_policy);
191 if (res)
192 return res;
193
194 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
195 return -EINVAL;
196
197 res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
198 if (!res)
199 return -EINVAL;
200 return res;
201 }
202
203 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
204 struct netlink_callback *cb,
205 struct cfg80211_registered_device **rdev,
206 struct net_device **dev)
207 {
208 int ifidx = cb->args[0];
209 int err;
210
211 if (!ifidx)
212 ifidx = nl80211_get_ifidx(cb);
213 if (ifidx < 0)
214 return ifidx;
215
216 cb->args[0] = ifidx;
217
218 rtnl_lock();
219
220 *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
221 if (!*dev) {
222 err = -ENODEV;
223 goto out_rtnl;
224 }
225
226 *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
227 if (IS_ERR(dev)) {
228 err = PTR_ERR(dev);
229 goto out_rtnl;
230 }
231
232 return 0;
233 out_rtnl:
234 rtnl_unlock();
235 return err;
236 }
237
238 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
239 {
240 cfg80211_unlock_rdev(rdev);
241 rtnl_unlock();
242 }
243
244 /* IE validation */
245 static bool is_valid_ie_attr(const struct nlattr *attr)
246 {
247 const u8 *pos;
248 int len;
249
250 if (!attr)
251 return true;
252
253 pos = nla_data(attr);
254 len = nla_len(attr);
255
256 while (len) {
257 u8 elemlen;
258
259 if (len < 2)
260 return false;
261 len -= 2;
262
263 elemlen = pos[1];
264 if (elemlen > len)
265 return false;
266
267 len -= elemlen;
268 pos += 2 + elemlen;
269 }
270
271 return true;
272 }
273
274 /* message building helper */
275 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
276 int flags, u8 cmd)
277 {
278 /* since there is no private header just add the generic one */
279 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
280 }
281
282 static int nl80211_msg_put_channel(struct sk_buff *msg,
283 struct ieee80211_channel *chan)
284 {
285 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
286 chan->center_freq);
287
288 if (chan->flags & IEEE80211_CHAN_DISABLED)
289 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
290 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
291 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
292 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
293 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
294 if (chan->flags & IEEE80211_CHAN_RADAR)
295 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
296
297 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
298 DBM_TO_MBM(chan->max_power));
299
300 return 0;
301
302 nla_put_failure:
303 return -ENOBUFS;
304 }
305
306 /* netlink command implementations */
307
308 struct key_parse {
309 struct key_params p;
310 int idx;
311 int type;
312 bool def, defmgmt;
313 };
314
315 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
316 {
317 struct nlattr *tb[NL80211_KEY_MAX + 1];
318 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
319 nl80211_key_policy);
320 if (err)
321 return err;
322
323 k->def = !!tb[NL80211_KEY_DEFAULT];
324 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
325
326 if (tb[NL80211_KEY_IDX])
327 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
328
329 if (tb[NL80211_KEY_DATA]) {
330 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
331 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
332 }
333
334 if (tb[NL80211_KEY_SEQ]) {
335 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
336 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
337 }
338
339 if (tb[NL80211_KEY_CIPHER])
340 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
341
342 if (tb[NL80211_KEY_TYPE]) {
343 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
344 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
345 return -EINVAL;
346 }
347
348 return 0;
349 }
350
351 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
352 {
353 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
354 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
355 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
356 }
357
358 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
359 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
360 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
361 }
362
363 if (info->attrs[NL80211_ATTR_KEY_IDX])
364 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
365
366 if (info->attrs[NL80211_ATTR_KEY_CIPHER])
367 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
368
369 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
370 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
371
372 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
373 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
374 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
375 return -EINVAL;
376 }
377
378 return 0;
379 }
380
381 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
382 {
383 int err;
384
385 memset(k, 0, sizeof(*k));
386 k->idx = -1;
387 k->type = -1;
388
389 if (info->attrs[NL80211_ATTR_KEY])
390 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
391 else
392 err = nl80211_parse_key_old(info, k);
393
394 if (err)
395 return err;
396
397 if (k->def && k->defmgmt)
398 return -EINVAL;
399
400 if (k->idx != -1) {
401 if (k->defmgmt) {
402 if (k->idx < 4 || k->idx > 5)
403 return -EINVAL;
404 } else if (k->def) {
405 if (k->idx < 0 || k->idx > 3)
406 return -EINVAL;
407 } else {
408 if (k->idx < 0 || k->idx > 5)
409 return -EINVAL;
410 }
411 }
412
413 return 0;
414 }
415
416 static struct cfg80211_cached_keys *
417 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
418 struct nlattr *keys)
419 {
420 struct key_parse parse;
421 struct nlattr *key;
422 struct cfg80211_cached_keys *result;
423 int rem, err, def = 0;
424
425 result = kzalloc(sizeof(*result), GFP_KERNEL);
426 if (!result)
427 return ERR_PTR(-ENOMEM);
428
429 result->def = -1;
430 result->defmgmt = -1;
431
432 nla_for_each_nested(key, keys, rem) {
433 memset(&parse, 0, sizeof(parse));
434 parse.idx = -1;
435
436 err = nl80211_parse_key_new(key, &parse);
437 if (err)
438 goto error;
439 err = -EINVAL;
440 if (!parse.p.key)
441 goto error;
442 if (parse.idx < 0 || parse.idx > 4)
443 goto error;
444 if (parse.def) {
445 if (def)
446 goto error;
447 def = 1;
448 result->def = parse.idx;
449 } else if (parse.defmgmt)
450 goto error;
451 err = cfg80211_validate_key_settings(rdev, &parse.p,
452 parse.idx, false, NULL);
453 if (err)
454 goto error;
455 result->params[parse.idx].cipher = parse.p.cipher;
456 result->params[parse.idx].key_len = parse.p.key_len;
457 result->params[parse.idx].key = result->data[parse.idx];
458 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
459 }
460
461 return result;
462 error:
463 kfree(result);
464 return ERR_PTR(err);
465 }
466
467 static int nl80211_key_allowed(struct wireless_dev *wdev)
468 {
469 ASSERT_WDEV_LOCK(wdev);
470
471 switch (wdev->iftype) {
472 case NL80211_IFTYPE_AP:
473 case NL80211_IFTYPE_AP_VLAN:
474 case NL80211_IFTYPE_P2P_GO:
475 break;
476 case NL80211_IFTYPE_ADHOC:
477 if (!wdev->current_bss)
478 return -ENOLINK;
479 break;
480 case NL80211_IFTYPE_STATION:
481 case NL80211_IFTYPE_P2P_CLIENT:
482 if (wdev->sme_state != CFG80211_SME_CONNECTED)
483 return -ENOLINK;
484 break;
485 default:
486 return -EINVAL;
487 }
488
489 return 0;
490 }
491
492 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
493 struct cfg80211_registered_device *dev)
494 {
495 void *hdr;
496 struct nlattr *nl_bands, *nl_band;
497 struct nlattr *nl_freqs, *nl_freq;
498 struct nlattr *nl_rates, *nl_rate;
499 struct nlattr *nl_modes;
500 struct nlattr *nl_cmds;
501 enum ieee80211_band band;
502 struct ieee80211_channel *chan;
503 struct ieee80211_rate *rate;
504 int i;
505 u16 ifmodes = dev->wiphy.interface_modes;
506 const struct ieee80211_txrx_stypes *mgmt_stypes =
507 dev->wiphy.mgmt_stypes;
508
509 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
510 if (!hdr)
511 return -1;
512
513 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
514 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
515
516 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
517 cfg80211_rdev_list_generation);
518
519 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
520 dev->wiphy.retry_short);
521 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
522 dev->wiphy.retry_long);
523 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
524 dev->wiphy.frag_threshold);
525 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
526 dev->wiphy.rts_threshold);
527 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
528 dev->wiphy.coverage_class);
529
530 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
531 dev->wiphy.max_scan_ssids);
532 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
533 dev->wiphy.max_scan_ie_len);
534
535 if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
536 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
537
538 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
539 sizeof(u32) * dev->wiphy.n_cipher_suites,
540 dev->wiphy.cipher_suites);
541
542 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
543 dev->wiphy.max_num_pmkids);
544
545 if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
546 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
547
548 nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
549 if (!nl_modes)
550 goto nla_put_failure;
551
552 i = 0;
553 while (ifmodes) {
554 if (ifmodes & 1)
555 NLA_PUT_FLAG(msg, i);
556 ifmodes >>= 1;
557 i++;
558 }
559
560 nla_nest_end(msg, nl_modes);
561
562 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
563 if (!nl_bands)
564 goto nla_put_failure;
565
566 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
567 if (!dev->wiphy.bands[band])
568 continue;
569
570 nl_band = nla_nest_start(msg, band);
571 if (!nl_band)
572 goto nla_put_failure;
573
574 /* add HT info */
575 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
576 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
577 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
578 &dev->wiphy.bands[band]->ht_cap.mcs);
579 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
580 dev->wiphy.bands[band]->ht_cap.cap);
581 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
582 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
583 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
584 dev->wiphy.bands[band]->ht_cap.ampdu_density);
585 }
586
587 /* add frequencies */
588 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
589 if (!nl_freqs)
590 goto nla_put_failure;
591
592 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
593 nl_freq = nla_nest_start(msg, i);
594 if (!nl_freq)
595 goto nla_put_failure;
596
597 chan = &dev->wiphy.bands[band]->channels[i];
598
599 if (nl80211_msg_put_channel(msg, chan))
600 goto nla_put_failure;
601
602 nla_nest_end(msg, nl_freq);
603 }
604
605 nla_nest_end(msg, nl_freqs);
606
607 /* add bitrates */
608 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
609 if (!nl_rates)
610 goto nla_put_failure;
611
612 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
613 nl_rate = nla_nest_start(msg, i);
614 if (!nl_rate)
615 goto nla_put_failure;
616
617 rate = &dev->wiphy.bands[band]->bitrates[i];
618 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
619 rate->bitrate);
620 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
621 NLA_PUT_FLAG(msg,
622 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
623
624 nla_nest_end(msg, nl_rate);
625 }
626
627 nla_nest_end(msg, nl_rates);
628
629 nla_nest_end(msg, nl_band);
630 }
631 nla_nest_end(msg, nl_bands);
632
633 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
634 if (!nl_cmds)
635 goto nla_put_failure;
636
637 i = 0;
638 #define CMD(op, n) \
639 do { \
640 if (dev->ops->op) { \
641 i++; \
642 NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
643 } \
644 } while (0)
645
646 CMD(add_virtual_intf, NEW_INTERFACE);
647 CMD(change_virtual_intf, SET_INTERFACE);
648 CMD(add_key, NEW_KEY);
649 CMD(add_beacon, NEW_BEACON);
650 CMD(add_station, NEW_STATION);
651 CMD(add_mpath, NEW_MPATH);
652 CMD(set_mesh_params, SET_MESH_PARAMS);
653 CMD(change_bss, SET_BSS);
654 CMD(auth, AUTHENTICATE);
655 CMD(assoc, ASSOCIATE);
656 CMD(deauth, DEAUTHENTICATE);
657 CMD(disassoc, DISASSOCIATE);
658 CMD(join_ibss, JOIN_IBSS);
659 CMD(set_pmksa, SET_PMKSA);
660 CMD(del_pmksa, DEL_PMKSA);
661 CMD(flush_pmksa, FLUSH_PMKSA);
662 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
663 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
664 CMD(mgmt_tx, FRAME);
665 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
666 i++;
667 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
668 }
669 CMD(set_channel, SET_CHANNEL);
670 CMD(set_wds_peer, SET_WDS_PEER);
671
672 #undef CMD
673
674 if (dev->ops->connect || dev->ops->auth) {
675 i++;
676 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
677 }
678
679 if (dev->ops->disconnect || dev->ops->deauth) {
680 i++;
681 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
682 }
683
684 nla_nest_end(msg, nl_cmds);
685
686 if (mgmt_stypes) {
687 u16 stypes;
688 struct nlattr *nl_ftypes, *nl_ifs;
689 enum nl80211_iftype ift;
690
691 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
692 if (!nl_ifs)
693 goto nla_put_failure;
694
695 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
696 nl_ftypes = nla_nest_start(msg, ift);
697 if (!nl_ftypes)
698 goto nla_put_failure;
699 i = 0;
700 stypes = mgmt_stypes[ift].tx;
701 while (stypes) {
702 if (stypes & 1)
703 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
704 (i << 4) | IEEE80211_FTYPE_MGMT);
705 stypes >>= 1;
706 i++;
707 }
708 nla_nest_end(msg, nl_ftypes);
709 }
710
711 nla_nest_end(msg, nl_ifs);
712
713 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
714 if (!nl_ifs)
715 goto nla_put_failure;
716
717 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
718 nl_ftypes = nla_nest_start(msg, ift);
719 if (!nl_ftypes)
720 goto nla_put_failure;
721 i = 0;
722 stypes = mgmt_stypes[ift].rx;
723 while (stypes) {
724 if (stypes & 1)
725 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
726 (i << 4) | IEEE80211_FTYPE_MGMT);
727 stypes >>= 1;
728 i++;
729 }
730 nla_nest_end(msg, nl_ftypes);
731 }
732 nla_nest_end(msg, nl_ifs);
733 }
734
735 return genlmsg_end(msg, hdr);
736
737 nla_put_failure:
738 genlmsg_cancel(msg, hdr);
739 return -EMSGSIZE;
740 }
741
742 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
743 {
744 int idx = 0;
745 int start = cb->args[0];
746 struct cfg80211_registered_device *dev;
747
748 mutex_lock(&cfg80211_mutex);
749 list_for_each_entry(dev, &cfg80211_rdev_list, list) {
750 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
751 continue;
752 if (++idx <= start)
753 continue;
754 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
755 cb->nlh->nlmsg_seq, NLM_F_MULTI,
756 dev) < 0) {
757 idx--;
758 break;
759 }
760 }
761 mutex_unlock(&cfg80211_mutex);
762
763 cb->args[0] = idx;
764
765 return skb->len;
766 }
767
768 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
769 {
770 struct sk_buff *msg;
771 struct cfg80211_registered_device *dev = info->user_ptr[0];
772
773 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
774 if (!msg)
775 return -ENOMEM;
776
777 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
778 nlmsg_free(msg);
779 return -ENOBUFS;
780 }
781
782 return genlmsg_reply(msg, info);
783 }
784
785 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
786 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
787 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
788 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
789 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
790 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
791 };
792
793 static int parse_txq_params(struct nlattr *tb[],
794 struct ieee80211_txq_params *txq_params)
795 {
796 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
797 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
798 !tb[NL80211_TXQ_ATTR_AIFS])
799 return -EINVAL;
800
801 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
802 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
803 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
804 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
805 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
806
807 return 0;
808 }
809
810 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
811 {
812 /*
813 * You can only set the channel explicitly for AP, mesh
814 * and WDS type interfaces; all others have their channel
815 * managed via their respective "establish a connection"
816 * command (connect, join, ...)
817 *
818 * Monitors are special as they are normally slaved to
819 * whatever else is going on, so they behave as though
820 * you tried setting the wiphy channel itself.
821 */
822 return !wdev ||
823 wdev->iftype == NL80211_IFTYPE_AP ||
824 wdev->iftype == NL80211_IFTYPE_WDS ||
825 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
826 wdev->iftype == NL80211_IFTYPE_MONITOR ||
827 wdev->iftype == NL80211_IFTYPE_P2P_GO;
828 }
829
830 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
831 struct wireless_dev *wdev,
832 struct genl_info *info)
833 {
834 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
835 u32 freq;
836 int result;
837
838 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
839 return -EINVAL;
840
841 if (!nl80211_can_set_dev_channel(wdev))
842 return -EOPNOTSUPP;
843
844 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
845 channel_type = nla_get_u32(info->attrs[
846 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
847 if (channel_type != NL80211_CHAN_NO_HT &&
848 channel_type != NL80211_CHAN_HT20 &&
849 channel_type != NL80211_CHAN_HT40PLUS &&
850 channel_type != NL80211_CHAN_HT40MINUS)
851 return -EINVAL;
852 }
853
854 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
855
856 mutex_lock(&rdev->devlist_mtx);
857 if (wdev) {
858 wdev_lock(wdev);
859 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
860 wdev_unlock(wdev);
861 } else {
862 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
863 }
864 mutex_unlock(&rdev->devlist_mtx);
865
866 return result;
867 }
868
869 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
870 {
871 struct cfg80211_registered_device *rdev = info->user_ptr[0];
872 struct net_device *netdev = info->user_ptr[1];
873
874 return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
875 }
876
877 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
878 {
879 struct cfg80211_registered_device *rdev = info->user_ptr[0];
880 struct net_device *dev = info->user_ptr[1];
881 struct wireless_dev *wdev = dev->ieee80211_ptr;
882 const u8 *bssid;
883
884 if (!info->attrs[NL80211_ATTR_MAC])
885 return -EINVAL;
886
887 if (netif_running(dev))
888 return -EBUSY;
889
890 if (!rdev->ops->set_wds_peer)
891 return -EOPNOTSUPP;
892
893 if (wdev->iftype != NL80211_IFTYPE_WDS)
894 return -EOPNOTSUPP;
895
896 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
897 return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
898 }
899
900
901 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
902 {
903 struct cfg80211_registered_device *rdev;
904 struct net_device *netdev = NULL;
905 struct wireless_dev *wdev;
906 int result = 0, rem_txq_params = 0;
907 struct nlattr *nl_txq_params;
908 u32 changed;
909 u8 retry_short = 0, retry_long = 0;
910 u32 frag_threshold = 0, rts_threshold = 0;
911 u8 coverage_class = 0;
912
913 /*
914 * Try to find the wiphy and netdev. Normally this
915 * function shouldn't need the netdev, but this is
916 * done for backward compatibility -- previously
917 * setting the channel was done per wiphy, but now
918 * it is per netdev. Previous userland like hostapd
919 * also passed a netdev to set_wiphy, so that it is
920 * possible to let that go to the right netdev!
921 */
922 mutex_lock(&cfg80211_mutex);
923
924 if (info->attrs[NL80211_ATTR_IFINDEX]) {
925 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
926
927 netdev = dev_get_by_index(genl_info_net(info), ifindex);
928 if (netdev && netdev->ieee80211_ptr) {
929 rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
930 mutex_lock(&rdev->mtx);
931 } else
932 netdev = NULL;
933 }
934
935 if (!netdev) {
936 rdev = __cfg80211_rdev_from_info(info);
937 if (IS_ERR(rdev)) {
938 mutex_unlock(&cfg80211_mutex);
939 return PTR_ERR(rdev);
940 }
941 wdev = NULL;
942 netdev = NULL;
943 result = 0;
944
945 mutex_lock(&rdev->mtx);
946 } else if (netif_running(netdev) &&
947 nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
948 wdev = netdev->ieee80211_ptr;
949 else
950 wdev = NULL;
951
952 /*
953 * end workaround code, by now the rdev is available
954 * and locked, and wdev may or may not be NULL.
955 */
956
957 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
958 result = cfg80211_dev_rename(
959 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
960
961 mutex_unlock(&cfg80211_mutex);
962
963 if (result)
964 goto bad_res;
965
966 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
967 struct ieee80211_txq_params txq_params;
968 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
969
970 if (!rdev->ops->set_txq_params) {
971 result = -EOPNOTSUPP;
972 goto bad_res;
973 }
974
975 nla_for_each_nested(nl_txq_params,
976 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
977 rem_txq_params) {
978 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
979 nla_data(nl_txq_params),
980 nla_len(nl_txq_params),
981 txq_params_policy);
982 result = parse_txq_params(tb, &txq_params);
983 if (result)
984 goto bad_res;
985
986 result = rdev->ops->set_txq_params(&rdev->wiphy,
987 &txq_params);
988 if (result)
989 goto bad_res;
990 }
991 }
992
993 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
994 result = __nl80211_set_channel(rdev, wdev, info);
995 if (result)
996 goto bad_res;
997 }
998
999 if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1000 enum nl80211_tx_power_setting type;
1001 int idx, mbm = 0;
1002
1003 if (!rdev->ops->set_tx_power) {
1004 result = -EOPNOTSUPP;
1005 goto bad_res;
1006 }
1007
1008 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1009 type = nla_get_u32(info->attrs[idx]);
1010
1011 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1012 (type != NL80211_TX_POWER_AUTOMATIC)) {
1013 result = -EINVAL;
1014 goto bad_res;
1015 }
1016
1017 if (type != NL80211_TX_POWER_AUTOMATIC) {
1018 idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1019 mbm = nla_get_u32(info->attrs[idx]);
1020 }
1021
1022 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1023 if (result)
1024 goto bad_res;
1025 }
1026
1027 changed = 0;
1028
1029 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1030 retry_short = nla_get_u8(
1031 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1032 if (retry_short == 0) {
1033 result = -EINVAL;
1034 goto bad_res;
1035 }
1036 changed |= WIPHY_PARAM_RETRY_SHORT;
1037 }
1038
1039 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1040 retry_long = nla_get_u8(
1041 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1042 if (retry_long == 0) {
1043 result = -EINVAL;
1044 goto bad_res;
1045 }
1046 changed |= WIPHY_PARAM_RETRY_LONG;
1047 }
1048
1049 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1050 frag_threshold = nla_get_u32(
1051 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1052 if (frag_threshold < 256) {
1053 result = -EINVAL;
1054 goto bad_res;
1055 }
1056 if (frag_threshold != (u32) -1) {
1057 /*
1058 * Fragments (apart from the last one) are required to
1059 * have even length. Make the fragmentation code
1060 * simpler by stripping LSB should someone try to use
1061 * odd threshold value.
1062 */
1063 frag_threshold &= ~0x1;
1064 }
1065 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1066 }
1067
1068 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1069 rts_threshold = nla_get_u32(
1070 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1071 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1072 }
1073
1074 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1075 coverage_class = nla_get_u8(
1076 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1077 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1078 }
1079
1080 if (changed) {
1081 u8 old_retry_short, old_retry_long;
1082 u32 old_frag_threshold, old_rts_threshold;
1083 u8 old_coverage_class;
1084
1085 if (!rdev->ops->set_wiphy_params) {
1086 result = -EOPNOTSUPP;
1087 goto bad_res;
1088 }
1089
1090 old_retry_short = rdev->wiphy.retry_short;
1091 old_retry_long = rdev->wiphy.retry_long;
1092 old_frag_threshold = rdev->wiphy.frag_threshold;
1093 old_rts_threshold = rdev->wiphy.rts_threshold;
1094 old_coverage_class = rdev->wiphy.coverage_class;
1095
1096 if (changed & WIPHY_PARAM_RETRY_SHORT)
1097 rdev->wiphy.retry_short = retry_short;
1098 if (changed & WIPHY_PARAM_RETRY_LONG)
1099 rdev->wiphy.retry_long = retry_long;
1100 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1101 rdev->wiphy.frag_threshold = frag_threshold;
1102 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1103 rdev->wiphy.rts_threshold = rts_threshold;
1104 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1105 rdev->wiphy.coverage_class = coverage_class;
1106
1107 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1108 if (result) {
1109 rdev->wiphy.retry_short = old_retry_short;
1110 rdev->wiphy.retry_long = old_retry_long;
1111 rdev->wiphy.frag_threshold = old_frag_threshold;
1112 rdev->wiphy.rts_threshold = old_rts_threshold;
1113 rdev->wiphy.coverage_class = old_coverage_class;
1114 }
1115 }
1116
1117 bad_res:
1118 mutex_unlock(&rdev->mtx);
1119 if (netdev)
1120 dev_put(netdev);
1121 return result;
1122 }
1123
1124
1125 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1126 struct cfg80211_registered_device *rdev,
1127 struct net_device *dev)
1128 {
1129 void *hdr;
1130
1131 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1132 if (!hdr)
1133 return -1;
1134
1135 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1136 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1137 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1138 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1139
1140 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1141 rdev->devlist_generation ^
1142 (cfg80211_rdev_list_generation << 2));
1143
1144 return genlmsg_end(msg, hdr);
1145
1146 nla_put_failure:
1147 genlmsg_cancel(msg, hdr);
1148 return -EMSGSIZE;
1149 }
1150
1151 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1152 {
1153 int wp_idx = 0;
1154 int if_idx = 0;
1155 int wp_start = cb->args[0];
1156 int if_start = cb->args[1];
1157 struct cfg80211_registered_device *rdev;
1158 struct wireless_dev *wdev;
1159
1160 mutex_lock(&cfg80211_mutex);
1161 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1162 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1163 continue;
1164 if (wp_idx < wp_start) {
1165 wp_idx++;
1166 continue;
1167 }
1168 if_idx = 0;
1169
1170 mutex_lock(&rdev->devlist_mtx);
1171 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1172 if (if_idx < if_start) {
1173 if_idx++;
1174 continue;
1175 }
1176 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1177 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1178 rdev, wdev->netdev) < 0) {
1179 mutex_unlock(&rdev->devlist_mtx);
1180 goto out;
1181 }
1182 if_idx++;
1183 }
1184 mutex_unlock(&rdev->devlist_mtx);
1185
1186 wp_idx++;
1187 }
1188 out:
1189 mutex_unlock(&cfg80211_mutex);
1190
1191 cb->args[0] = wp_idx;
1192 cb->args[1] = if_idx;
1193
1194 return skb->len;
1195 }
1196
1197 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1198 {
1199 struct sk_buff *msg;
1200 struct cfg80211_registered_device *dev = info->user_ptr[0];
1201 struct net_device *netdev = info->user_ptr[1];
1202
1203 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1204 if (!msg)
1205 return -ENOMEM;
1206
1207 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1208 dev, netdev) < 0) {
1209 nlmsg_free(msg);
1210 return -ENOBUFS;
1211 }
1212
1213 return genlmsg_reply(msg, info);
1214 }
1215
1216 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1217 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1218 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1219 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1220 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1221 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1222 };
1223
1224 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1225 {
1226 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1227 int flag;
1228
1229 *mntrflags = 0;
1230
1231 if (!nla)
1232 return -EINVAL;
1233
1234 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1235 nla, mntr_flags_policy))
1236 return -EINVAL;
1237
1238 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1239 if (flags[flag])
1240 *mntrflags |= (1<<flag);
1241
1242 return 0;
1243 }
1244
1245 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1246 struct net_device *netdev, u8 use_4addr,
1247 enum nl80211_iftype iftype)
1248 {
1249 if (!use_4addr) {
1250 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1251 return -EBUSY;
1252 return 0;
1253 }
1254
1255 switch (iftype) {
1256 case NL80211_IFTYPE_AP_VLAN:
1257 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1258 return 0;
1259 break;
1260 case NL80211_IFTYPE_STATION:
1261 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1262 return 0;
1263 break;
1264 default:
1265 break;
1266 }
1267
1268 return -EOPNOTSUPP;
1269 }
1270
1271 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1272 {
1273 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1274 struct vif_params params;
1275 int err;
1276 enum nl80211_iftype otype, ntype;
1277 struct net_device *dev = info->user_ptr[1];
1278 u32 _flags, *flags = NULL;
1279 bool change = false;
1280
1281 memset(&params, 0, sizeof(params));
1282
1283 otype = ntype = dev->ieee80211_ptr->iftype;
1284
1285 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1286 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1287 if (otype != ntype)
1288 change = true;
1289 if (ntype > NL80211_IFTYPE_MAX)
1290 return -EINVAL;
1291 }
1292
1293 if (info->attrs[NL80211_ATTR_MESH_ID]) {
1294 if (ntype != NL80211_IFTYPE_MESH_POINT)
1295 return -EINVAL;
1296 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1297 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1298 change = true;
1299 }
1300
1301 if (info->attrs[NL80211_ATTR_4ADDR]) {
1302 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1303 change = true;
1304 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1305 if (err)
1306 return err;
1307 } else {
1308 params.use_4addr = -1;
1309 }
1310
1311 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1312 if (ntype != NL80211_IFTYPE_MONITOR)
1313 return -EINVAL;
1314 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1315 &_flags);
1316 if (err)
1317 return err;
1318
1319 flags = &_flags;
1320 change = true;
1321 }
1322
1323 if (change)
1324 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1325 else
1326 err = 0;
1327
1328 if (!err && params.use_4addr != -1)
1329 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1330
1331 return err;
1332 }
1333
1334 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1335 {
1336 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1337 struct vif_params params;
1338 int err;
1339 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1340 u32 flags;
1341
1342 memset(&params, 0, sizeof(params));
1343
1344 if (!info->attrs[NL80211_ATTR_IFNAME])
1345 return -EINVAL;
1346
1347 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1348 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1349 if (type > NL80211_IFTYPE_MAX)
1350 return -EINVAL;
1351 }
1352
1353 if (!rdev->ops->add_virtual_intf ||
1354 !(rdev->wiphy.interface_modes & (1 << type)))
1355 return -EOPNOTSUPP;
1356
1357 if (type == NL80211_IFTYPE_MESH_POINT &&
1358 info->attrs[NL80211_ATTR_MESH_ID]) {
1359 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1360 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1361 }
1362
1363 if (info->attrs[NL80211_ATTR_4ADDR]) {
1364 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1365 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1366 if (err)
1367 return err;
1368 }
1369
1370 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1371 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1372 &flags);
1373 err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1374 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1375 type, err ? NULL : &flags, &params);
1376
1377 return err;
1378 }
1379
1380 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1381 {
1382 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1383 struct net_device *dev = info->user_ptr[1];
1384
1385 if (!rdev->ops->del_virtual_intf)
1386 return -EOPNOTSUPP;
1387
1388 return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1389 }
1390
1391 struct get_key_cookie {
1392 struct sk_buff *msg;
1393 int error;
1394 int idx;
1395 };
1396
1397 static void get_key_callback(void *c, struct key_params *params)
1398 {
1399 struct nlattr *key;
1400 struct get_key_cookie *cookie = c;
1401
1402 if (params->key)
1403 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1404 params->key_len, params->key);
1405
1406 if (params->seq)
1407 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1408 params->seq_len, params->seq);
1409
1410 if (params->cipher)
1411 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1412 params->cipher);
1413
1414 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1415 if (!key)
1416 goto nla_put_failure;
1417
1418 if (params->key)
1419 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1420 params->key_len, params->key);
1421
1422 if (params->seq)
1423 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1424 params->seq_len, params->seq);
1425
1426 if (params->cipher)
1427 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1428 params->cipher);
1429
1430 NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1431
1432 nla_nest_end(cookie->msg, key);
1433
1434 return;
1435 nla_put_failure:
1436 cookie->error = 1;
1437 }
1438
1439 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1440 {
1441 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1442 int err;
1443 struct net_device *dev = info->user_ptr[1];
1444 u8 key_idx = 0;
1445 const u8 *mac_addr = NULL;
1446 bool pairwise;
1447 struct get_key_cookie cookie = {
1448 .error = 0,
1449 };
1450 void *hdr;
1451 struct sk_buff *msg;
1452
1453 if (info->attrs[NL80211_ATTR_KEY_IDX])
1454 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1455
1456 if (key_idx > 5)
1457 return -EINVAL;
1458
1459 if (info->attrs[NL80211_ATTR_MAC])
1460 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1461
1462 pairwise = !!mac_addr;
1463 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1464 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1465 if (kt >= NUM_NL80211_KEYTYPES)
1466 return -EINVAL;
1467 if (kt != NL80211_KEYTYPE_GROUP &&
1468 kt != NL80211_KEYTYPE_PAIRWISE)
1469 return -EINVAL;
1470 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1471 }
1472
1473 if (!rdev->ops->get_key)
1474 return -EOPNOTSUPP;
1475
1476 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1477 if (!msg)
1478 return -ENOMEM;
1479
1480 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1481 NL80211_CMD_NEW_KEY);
1482 if (IS_ERR(hdr))
1483 return PTR_ERR(hdr);
1484
1485 cookie.msg = msg;
1486 cookie.idx = key_idx;
1487
1488 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1489 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1490 if (mac_addr)
1491 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1492
1493 if (pairwise && mac_addr &&
1494 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1495 return -ENOENT;
1496
1497 err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1498 mac_addr, &cookie, get_key_callback);
1499
1500 if (err)
1501 goto free_msg;
1502
1503 if (cookie.error)
1504 goto nla_put_failure;
1505
1506 genlmsg_end(msg, hdr);
1507 return genlmsg_reply(msg, info);
1508
1509 nla_put_failure:
1510 err = -ENOBUFS;
1511 free_msg:
1512 nlmsg_free(msg);
1513 return err;
1514 }
1515
1516 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1517 {
1518 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1519 struct key_parse key;
1520 int err;
1521 struct net_device *dev = info->user_ptr[1];
1522 int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1523 u8 key_index);
1524
1525 err = nl80211_parse_key(info, &key);
1526 if (err)
1527 return err;
1528
1529 if (key.idx < 0)
1530 return -EINVAL;
1531
1532 /* only support setting default key */
1533 if (!key.def && !key.defmgmt)
1534 return -EINVAL;
1535
1536 if (key.def)
1537 func = rdev->ops->set_default_key;
1538 else
1539 func = rdev->ops->set_default_mgmt_key;
1540
1541 if (!func)
1542 return -EOPNOTSUPP;
1543
1544 wdev_lock(dev->ieee80211_ptr);
1545 err = nl80211_key_allowed(dev->ieee80211_ptr);
1546 if (!err)
1547 err = func(&rdev->wiphy, dev, key.idx);
1548
1549 #ifdef CONFIG_CFG80211_WEXT
1550 if (!err) {
1551 if (func == rdev->ops->set_default_key)
1552 dev->ieee80211_ptr->wext.default_key = key.idx;
1553 else
1554 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1555 }
1556 #endif
1557 wdev_unlock(dev->ieee80211_ptr);
1558
1559 return err;
1560 }
1561
1562 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1563 {
1564 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1565 int err;
1566 struct net_device *dev = info->user_ptr[1];
1567 struct key_parse key;
1568 const u8 *mac_addr = NULL;
1569
1570 err = nl80211_parse_key(info, &key);
1571 if (err)
1572 return err;
1573
1574 if (!key.p.key)
1575 return -EINVAL;
1576
1577 if (info->attrs[NL80211_ATTR_MAC])
1578 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1579
1580 if (key.type == -1) {
1581 if (mac_addr)
1582 key.type = NL80211_KEYTYPE_PAIRWISE;
1583 else
1584 key.type = NL80211_KEYTYPE_GROUP;
1585 }
1586
1587 /* for now */
1588 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1589 key.type != NL80211_KEYTYPE_GROUP)
1590 return -EINVAL;
1591
1592 if (!rdev->ops->add_key)
1593 return -EOPNOTSUPP;
1594
1595 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1596 key.type == NL80211_KEYTYPE_PAIRWISE,
1597 mac_addr))
1598 return -EINVAL;
1599
1600 wdev_lock(dev->ieee80211_ptr);
1601 err = nl80211_key_allowed(dev->ieee80211_ptr);
1602 if (!err)
1603 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1604 key.type == NL80211_KEYTYPE_PAIRWISE,
1605 mac_addr, &key.p);
1606 wdev_unlock(dev->ieee80211_ptr);
1607
1608 return err;
1609 }
1610
1611 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1612 {
1613 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1614 int err;
1615 struct net_device *dev = info->user_ptr[1];
1616 u8 *mac_addr = NULL;
1617 struct key_parse key;
1618
1619 err = nl80211_parse_key(info, &key);
1620 if (err)
1621 return err;
1622
1623 if (info->attrs[NL80211_ATTR_MAC])
1624 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1625
1626 if (key.type == -1) {
1627 if (mac_addr)
1628 key.type = NL80211_KEYTYPE_PAIRWISE;
1629 else
1630 key.type = NL80211_KEYTYPE_GROUP;
1631 }
1632
1633 /* for now */
1634 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1635 key.type != NL80211_KEYTYPE_GROUP)
1636 return -EINVAL;
1637
1638 if (!rdev->ops->del_key)
1639 return -EOPNOTSUPP;
1640
1641 wdev_lock(dev->ieee80211_ptr);
1642 err = nl80211_key_allowed(dev->ieee80211_ptr);
1643
1644 if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1645 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1646 err = -ENOENT;
1647
1648 if (!err)
1649 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1650 key.type == NL80211_KEYTYPE_PAIRWISE,
1651 mac_addr);
1652
1653 #ifdef CONFIG_CFG80211_WEXT
1654 if (!err) {
1655 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1656 dev->ieee80211_ptr->wext.default_key = -1;
1657 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1658 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1659 }
1660 #endif
1661 wdev_unlock(dev->ieee80211_ptr);
1662
1663 return err;
1664 }
1665
1666 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1667 {
1668 int (*call)(struct wiphy *wiphy, struct net_device *dev,
1669 struct beacon_parameters *info);
1670 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1671 struct net_device *dev = info->user_ptr[1];
1672 struct beacon_parameters params;
1673 int haveinfo = 0;
1674
1675 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1676 return -EINVAL;
1677
1678 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1679 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1680 return -EOPNOTSUPP;
1681
1682 switch (info->genlhdr->cmd) {
1683 case NL80211_CMD_NEW_BEACON:
1684 /* these are required for NEW_BEACON */
1685 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1686 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1687 !info->attrs[NL80211_ATTR_BEACON_HEAD])
1688 return -EINVAL;
1689
1690 call = rdev->ops->add_beacon;
1691 break;
1692 case NL80211_CMD_SET_BEACON:
1693 call = rdev->ops->set_beacon;
1694 break;
1695 default:
1696 WARN_ON(1);
1697 return -EOPNOTSUPP;
1698 }
1699
1700 if (!call)
1701 return -EOPNOTSUPP;
1702
1703 memset(&params, 0, sizeof(params));
1704
1705 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1706 params.interval =
1707 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1708 haveinfo = 1;
1709 }
1710
1711 if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1712 params.dtim_period =
1713 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1714 haveinfo = 1;
1715 }
1716
1717 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1718 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1719 params.head_len =
1720 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1721 haveinfo = 1;
1722 }
1723
1724 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1725 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1726 params.tail_len =
1727 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1728 haveinfo = 1;
1729 }
1730
1731 if (!haveinfo)
1732 return -EINVAL;
1733
1734 return call(&rdev->wiphy, dev, &params);
1735 }
1736
1737 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1738 {
1739 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1740 struct net_device *dev = info->user_ptr[1];
1741
1742 if (!rdev->ops->del_beacon)
1743 return -EOPNOTSUPP;
1744
1745 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1746 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1747 return -EOPNOTSUPP;
1748
1749 return rdev->ops->del_beacon(&rdev->wiphy, dev);
1750 }
1751
1752 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1753 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1754 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1755 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1756 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1757 };
1758
1759 static int parse_station_flags(struct genl_info *info,
1760 struct station_parameters *params)
1761 {
1762 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1763 struct nlattr *nla;
1764 int flag;
1765
1766 /*
1767 * Try parsing the new attribute first so userspace
1768 * can specify both for older kernels.
1769 */
1770 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1771 if (nla) {
1772 struct nl80211_sta_flag_update *sta_flags;
1773
1774 sta_flags = nla_data(nla);
1775 params->sta_flags_mask = sta_flags->mask;
1776 params->sta_flags_set = sta_flags->set;
1777 if ((params->sta_flags_mask |
1778 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1779 return -EINVAL;
1780 return 0;
1781 }
1782
1783 /* if present, parse the old attribute */
1784
1785 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1786 if (!nla)
1787 return 0;
1788
1789 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1790 nla, sta_flags_policy))
1791 return -EINVAL;
1792
1793 params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1794 params->sta_flags_mask &= ~1;
1795
1796 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1797 if (flags[flag])
1798 params->sta_flags_set |= (1<<flag);
1799
1800 return 0;
1801 }
1802
1803 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1804 int flags, struct net_device *dev,
1805 const u8 *mac_addr, struct station_info *sinfo)
1806 {
1807 void *hdr;
1808 struct nlattr *sinfoattr, *txrate;
1809 u16 bitrate;
1810
1811 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1812 if (!hdr)
1813 return -1;
1814
1815 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1816 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1817
1818 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1819
1820 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1821 if (!sinfoattr)
1822 goto nla_put_failure;
1823 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1824 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1825 sinfo->inactive_time);
1826 if (sinfo->filled & STATION_INFO_RX_BYTES)
1827 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1828 sinfo->rx_bytes);
1829 if (sinfo->filled & STATION_INFO_TX_BYTES)
1830 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1831 sinfo->tx_bytes);
1832 if (sinfo->filled & STATION_INFO_LLID)
1833 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1834 sinfo->llid);
1835 if (sinfo->filled & STATION_INFO_PLID)
1836 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1837 sinfo->plid);
1838 if (sinfo->filled & STATION_INFO_PLINK_STATE)
1839 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1840 sinfo->plink_state);
1841 if (sinfo->filled & STATION_INFO_SIGNAL)
1842 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1843 sinfo->signal);
1844 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1845 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1846 if (!txrate)
1847 goto nla_put_failure;
1848
1849 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1850 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1851 if (bitrate > 0)
1852 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1853
1854 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1855 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1856 sinfo->txrate.mcs);
1857 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1858 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1859 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1860 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1861
1862 nla_nest_end(msg, txrate);
1863 }
1864 if (sinfo->filled & STATION_INFO_RX_PACKETS)
1865 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1866 sinfo->rx_packets);
1867 if (sinfo->filled & STATION_INFO_TX_PACKETS)
1868 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1869 sinfo->tx_packets);
1870 if (sinfo->filled & STATION_INFO_TX_RETRIES)
1871 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
1872 sinfo->tx_retries);
1873 if (sinfo->filled & STATION_INFO_TX_FAILED)
1874 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
1875 sinfo->tx_failed);
1876 nla_nest_end(msg, sinfoattr);
1877
1878 return genlmsg_end(msg, hdr);
1879
1880 nla_put_failure:
1881 genlmsg_cancel(msg, hdr);
1882 return -EMSGSIZE;
1883 }
1884
1885 static int nl80211_dump_station(struct sk_buff *skb,
1886 struct netlink_callback *cb)
1887 {
1888 struct station_info sinfo;
1889 struct cfg80211_registered_device *dev;
1890 struct net_device *netdev;
1891 u8 mac_addr[ETH_ALEN];
1892 int sta_idx = cb->args[1];
1893 int err;
1894
1895 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
1896 if (err)
1897 return err;
1898
1899 if (!dev->ops->dump_station) {
1900 err = -EOPNOTSUPP;
1901 goto out_err;
1902 }
1903
1904 while (1) {
1905 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1906 mac_addr, &sinfo);
1907 if (err == -ENOENT)
1908 break;
1909 if (err)
1910 goto out_err;
1911
1912 if (nl80211_send_station(skb,
1913 NETLINK_CB(cb->skb).pid,
1914 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1915 netdev, mac_addr,
1916 &sinfo) < 0)
1917 goto out;
1918
1919 sta_idx++;
1920 }
1921
1922
1923 out:
1924 cb->args[1] = sta_idx;
1925 err = skb->len;
1926 out_err:
1927 nl80211_finish_netdev_dump(dev);
1928
1929 return err;
1930 }
1931
1932 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1933 {
1934 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1935 struct net_device *dev = info->user_ptr[1];
1936 struct station_info sinfo;
1937 struct sk_buff *msg;
1938 u8 *mac_addr = NULL;
1939 int err;
1940
1941 memset(&sinfo, 0, sizeof(sinfo));
1942
1943 if (!info->attrs[NL80211_ATTR_MAC])
1944 return -EINVAL;
1945
1946 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1947
1948 if (!rdev->ops->get_station)
1949 return -EOPNOTSUPP;
1950
1951 err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1952 if (err)
1953 return err;
1954
1955 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1956 if (!msg)
1957 return -ENOMEM;
1958
1959 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1960 dev, mac_addr, &sinfo) < 0) {
1961 nlmsg_free(msg);
1962 return -ENOBUFS;
1963 }
1964
1965 return genlmsg_reply(msg, info);
1966 }
1967
1968 /*
1969 * Get vlan interface making sure it is running and on the right wiphy.
1970 */
1971 static int get_vlan(struct genl_info *info,
1972 struct cfg80211_registered_device *rdev,
1973 struct net_device **vlan)
1974 {
1975 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1976 *vlan = NULL;
1977
1978 if (vlanattr) {
1979 *vlan = dev_get_by_index(genl_info_net(info),
1980 nla_get_u32(vlanattr));
1981 if (!*vlan)
1982 return -ENODEV;
1983 if (!(*vlan)->ieee80211_ptr)
1984 return -EINVAL;
1985 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1986 return -EINVAL;
1987 if (!netif_running(*vlan))
1988 return -ENETDOWN;
1989 }
1990 return 0;
1991 }
1992
1993 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1994 {
1995 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1996 int err;
1997 struct net_device *dev = info->user_ptr[1];
1998 struct station_parameters params;
1999 u8 *mac_addr = NULL;
2000
2001 memset(&params, 0, sizeof(params));
2002
2003 params.listen_interval = -1;
2004
2005 if (info->attrs[NL80211_ATTR_STA_AID])
2006 return -EINVAL;
2007
2008 if (!info->attrs[NL80211_ATTR_MAC])
2009 return -EINVAL;
2010
2011 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2012
2013 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2014 params.supported_rates =
2015 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2016 params.supported_rates_len =
2017 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2018 }
2019
2020 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2021 params.listen_interval =
2022 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2023
2024 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2025 params.ht_capa =
2026 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2027
2028 if (parse_station_flags(info, &params))
2029 return -EINVAL;
2030
2031 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2032 params.plink_action =
2033 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2034
2035 err = get_vlan(info, rdev, &params.vlan);
2036 if (err)
2037 goto out;
2038
2039 /* validate settings */
2040 err = 0;
2041
2042 switch (dev->ieee80211_ptr->iftype) {
2043 case NL80211_IFTYPE_AP:
2044 case NL80211_IFTYPE_AP_VLAN:
2045 case NL80211_IFTYPE_P2P_GO:
2046 /* disallow mesh-specific things */
2047 if (params.plink_action)
2048 err = -EINVAL;
2049 break;
2050 case NL80211_IFTYPE_P2P_CLIENT:
2051 case NL80211_IFTYPE_STATION:
2052 /* disallow everything but AUTHORIZED flag */
2053 if (params.plink_action)
2054 err = -EINVAL;
2055 if (params.vlan)
2056 err = -EINVAL;
2057 if (params.supported_rates)
2058 err = -EINVAL;
2059 if (params.ht_capa)
2060 err = -EINVAL;
2061 if (params.listen_interval >= 0)
2062 err = -EINVAL;
2063 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2064 err = -EINVAL;
2065 break;
2066 case NL80211_IFTYPE_MESH_POINT:
2067 /* disallow things mesh doesn't support */
2068 if (params.vlan)
2069 err = -EINVAL;
2070 if (params.ht_capa)
2071 err = -EINVAL;
2072 if (params.listen_interval >= 0)
2073 err = -EINVAL;
2074 if (params.supported_rates)
2075 err = -EINVAL;
2076 if (params.sta_flags_mask)
2077 err = -EINVAL;
2078 break;
2079 default:
2080 err = -EINVAL;
2081 }
2082
2083 if (err)
2084 goto out;
2085
2086 if (!rdev->ops->change_station) {
2087 err = -EOPNOTSUPP;
2088 goto out;
2089 }
2090
2091 err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2092
2093 out:
2094 if (params.vlan)
2095 dev_put(params.vlan);
2096
2097 return err;
2098 }
2099
2100 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2101 {
2102 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2103 int err;
2104 struct net_device *dev = info->user_ptr[1];
2105 struct station_parameters params;
2106 u8 *mac_addr = NULL;
2107
2108 memset(&params, 0, sizeof(params));
2109
2110 if (!info->attrs[NL80211_ATTR_MAC])
2111 return -EINVAL;
2112
2113 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2114 return -EINVAL;
2115
2116 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2117 return -EINVAL;
2118
2119 if (!info->attrs[NL80211_ATTR_STA_AID])
2120 return -EINVAL;
2121
2122 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2123 params.supported_rates =
2124 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2125 params.supported_rates_len =
2126 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2127 params.listen_interval =
2128 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2129
2130 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2131 if (!params.aid || params.aid > IEEE80211_MAX_AID)
2132 return -EINVAL;
2133
2134 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2135 params.ht_capa =
2136 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2137
2138 if (parse_station_flags(info, &params))
2139 return -EINVAL;
2140
2141 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2142 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2143 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2144 return -EINVAL;
2145
2146 err = get_vlan(info, rdev, &params.vlan);
2147 if (err)
2148 goto out;
2149
2150 /* validate settings */
2151 err = 0;
2152
2153 if (!rdev->ops->add_station) {
2154 err = -EOPNOTSUPP;
2155 goto out;
2156 }
2157
2158 err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2159
2160 out:
2161 if (params.vlan)
2162 dev_put(params.vlan);
2163 return err;
2164 }
2165
2166 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2167 {
2168 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2169 struct net_device *dev = info->user_ptr[1];
2170 u8 *mac_addr = NULL;
2171
2172 if (info->attrs[NL80211_ATTR_MAC])
2173 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2174
2175 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2176 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2177 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2178 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2179 return -EINVAL;
2180
2181 if (!rdev->ops->del_station)
2182 return -EOPNOTSUPP;
2183
2184 return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2185 }
2186
2187 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2188 int flags, struct net_device *dev,
2189 u8 *dst, u8 *next_hop,
2190 struct mpath_info *pinfo)
2191 {
2192 void *hdr;
2193 struct nlattr *pinfoattr;
2194
2195 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2196 if (!hdr)
2197 return -1;
2198
2199 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2200 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2201 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2202
2203 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2204
2205 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2206 if (!pinfoattr)
2207 goto nla_put_failure;
2208 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2209 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2210 pinfo->frame_qlen);
2211 if (pinfo->filled & MPATH_INFO_SN)
2212 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2213 pinfo->sn);
2214 if (pinfo->filled & MPATH_INFO_METRIC)
2215 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2216 pinfo->metric);
2217 if (pinfo->filled & MPATH_INFO_EXPTIME)
2218 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2219 pinfo->exptime);
2220 if (pinfo->filled & MPATH_INFO_FLAGS)
2221 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2222 pinfo->flags);
2223 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2224 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2225 pinfo->discovery_timeout);
2226 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2227 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2228 pinfo->discovery_retries);
2229
2230 nla_nest_end(msg, pinfoattr);
2231
2232 return genlmsg_end(msg, hdr);
2233
2234 nla_put_failure:
2235 genlmsg_cancel(msg, hdr);
2236 return -EMSGSIZE;
2237 }
2238
2239 static int nl80211_dump_mpath(struct sk_buff *skb,
2240 struct netlink_callback *cb)
2241 {
2242 struct mpath_info pinfo;
2243 struct cfg80211_registered_device *dev;
2244 struct net_device *netdev;
2245 u8 dst[ETH_ALEN];
2246 u8 next_hop[ETH_ALEN];
2247 int path_idx = cb->args[1];
2248 int err;
2249
2250 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2251 if (err)
2252 return err;
2253
2254 if (!dev->ops->dump_mpath) {
2255 err = -EOPNOTSUPP;
2256 goto out_err;
2257 }
2258
2259 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2260 err = -EOPNOTSUPP;
2261 goto out_err;
2262 }
2263
2264 while (1) {
2265 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2266 dst, next_hop, &pinfo);
2267 if (err == -ENOENT)
2268 break;
2269 if (err)
2270 goto out_err;
2271
2272 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2273 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2274 netdev, dst, next_hop,
2275 &pinfo) < 0)
2276 goto out;
2277
2278 path_idx++;
2279 }
2280
2281
2282 out:
2283 cb->args[1] = path_idx;
2284 err = skb->len;
2285 out_err:
2286 nl80211_finish_netdev_dump(dev);
2287 return err;
2288 }
2289
2290 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2291 {
2292 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2293 int err;
2294 struct net_device *dev = info->user_ptr[1];
2295 struct mpath_info pinfo;
2296 struct sk_buff *msg;
2297 u8 *dst = NULL;
2298 u8 next_hop[ETH_ALEN];
2299
2300 memset(&pinfo, 0, sizeof(pinfo));
2301
2302 if (!info->attrs[NL80211_ATTR_MAC])
2303 return -EINVAL;
2304
2305 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2306
2307 if (!rdev->ops->get_mpath)
2308 return -EOPNOTSUPP;
2309
2310 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2311 return -EOPNOTSUPP;
2312
2313 err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2314 if (err)
2315 return err;
2316
2317 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2318 if (!msg)
2319 return -ENOMEM;
2320
2321 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2322 dev, dst, next_hop, &pinfo) < 0) {
2323 nlmsg_free(msg);
2324 return -ENOBUFS;
2325 }
2326
2327 return genlmsg_reply(msg, info);
2328 }
2329
2330 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2331 {
2332 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2333 struct net_device *dev = info->user_ptr[1];
2334 u8 *dst = NULL;
2335 u8 *next_hop = NULL;
2336
2337 if (!info->attrs[NL80211_ATTR_MAC])
2338 return -EINVAL;
2339
2340 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2341 return -EINVAL;
2342
2343 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2344 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2345
2346 if (!rdev->ops->change_mpath)
2347 return -EOPNOTSUPP;
2348
2349 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2350 return -EOPNOTSUPP;
2351
2352 return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2353 }
2354
2355 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2356 {
2357 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2358 struct net_device *dev = info->user_ptr[1];
2359 u8 *dst = NULL;
2360 u8 *next_hop = NULL;
2361
2362 if (!info->attrs[NL80211_ATTR_MAC])
2363 return -EINVAL;
2364
2365 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2366 return -EINVAL;
2367
2368 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2369 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2370
2371 if (!rdev->ops->add_mpath)
2372 return -EOPNOTSUPP;
2373
2374 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2375 return -EOPNOTSUPP;
2376
2377 return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2378 }
2379
2380 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2381 {
2382 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2383 struct net_device *dev = info->user_ptr[1];
2384 u8 *dst = NULL;
2385
2386 if (info->attrs[NL80211_ATTR_MAC])
2387 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2388
2389 if (!rdev->ops->del_mpath)
2390 return -EOPNOTSUPP;
2391
2392 return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2393 }
2394
2395 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2396 {
2397 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2398 struct net_device *dev = info->user_ptr[1];
2399 struct bss_parameters params;
2400
2401 memset(&params, 0, sizeof(params));
2402 /* default to not changing parameters */
2403 params.use_cts_prot = -1;
2404 params.use_short_preamble = -1;
2405 params.use_short_slot_time = -1;
2406 params.ap_isolate = -1;
2407
2408 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2409 params.use_cts_prot =
2410 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2411 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2412 params.use_short_preamble =
2413 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2414 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2415 params.use_short_slot_time =
2416 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2417 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2418 params.basic_rates =
2419 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2420 params.basic_rates_len =
2421 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2422 }
2423 if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2424 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2425
2426 if (!rdev->ops->change_bss)
2427 return -EOPNOTSUPP;
2428
2429 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2430 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2431 return -EOPNOTSUPP;
2432
2433 return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2434 }
2435
2436 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2437 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
2438 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
2439 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
2440 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
2441 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
2442 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
2443 };
2444
2445 static int parse_reg_rule(struct nlattr *tb[],
2446 struct ieee80211_reg_rule *reg_rule)
2447 {
2448 struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2449 struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2450
2451 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2452 return -EINVAL;
2453 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2454 return -EINVAL;
2455 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2456 return -EINVAL;
2457 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2458 return -EINVAL;
2459 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2460 return -EINVAL;
2461
2462 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2463
2464 freq_range->start_freq_khz =
2465 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2466 freq_range->end_freq_khz =
2467 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2468 freq_range->max_bandwidth_khz =
2469 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2470
2471 power_rule->max_eirp =
2472 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2473
2474 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2475 power_rule->max_antenna_gain =
2476 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2477
2478 return 0;
2479 }
2480
2481 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2482 {
2483 int r;
2484 char *data = NULL;
2485
2486 /*
2487 * You should only get this when cfg80211 hasn't yet initialized
2488 * completely when built-in to the kernel right between the time
2489 * window between nl80211_init() and regulatory_init(), if that is
2490 * even possible.
2491 */
2492 mutex_lock(&cfg80211_mutex);
2493 if (unlikely(!cfg80211_regdomain)) {
2494 mutex_unlock(&cfg80211_mutex);
2495 return -EINPROGRESS;
2496 }
2497 mutex_unlock(&cfg80211_mutex);
2498
2499 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2500 return -EINVAL;
2501
2502 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2503
2504 r = regulatory_hint_user(data);
2505
2506 return r;
2507 }
2508
2509 static int nl80211_get_mesh_params(struct sk_buff *skb,
2510 struct genl_info *info)
2511 {
2512 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2513 struct mesh_config cur_params;
2514 int err;
2515 struct net_device *dev = info->user_ptr[1];
2516 void *hdr;
2517 struct nlattr *pinfoattr;
2518 struct sk_buff *msg;
2519
2520 if (!rdev->ops->get_mesh_params)
2521 return -EOPNOTSUPP;
2522
2523 /* Get the mesh params */
2524 err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2525 if (err)
2526 return err;
2527
2528 /* Draw up a netlink message to send back */
2529 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2530 if (!msg)
2531 return -ENOMEM;
2532 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2533 NL80211_CMD_GET_MESH_PARAMS);
2534 if (!hdr)
2535 goto nla_put_failure;
2536 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2537 if (!pinfoattr)
2538 goto nla_put_failure;
2539 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2540 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2541 cur_params.dot11MeshRetryTimeout);
2542 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2543 cur_params.dot11MeshConfirmTimeout);
2544 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2545 cur_params.dot11MeshHoldingTimeout);
2546 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2547 cur_params.dot11MeshMaxPeerLinks);
2548 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2549 cur_params.dot11MeshMaxRetries);
2550 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2551 cur_params.dot11MeshTTL);
2552 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2553 cur_params.auto_open_plinks);
2554 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2555 cur_params.dot11MeshHWMPmaxPREQretries);
2556 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2557 cur_params.path_refresh_time);
2558 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2559 cur_params.min_discovery_timeout);
2560 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2561 cur_params.dot11MeshHWMPactivePathTimeout);
2562 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2563 cur_params.dot11MeshHWMPpreqMinInterval);
2564 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2565 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2566 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2567 cur_params.dot11MeshHWMPRootMode);
2568 nla_nest_end(msg, pinfoattr);
2569 genlmsg_end(msg, hdr);
2570 return genlmsg_reply(msg, info);
2571
2572 nla_put_failure:
2573 genlmsg_cancel(msg, hdr);
2574 nlmsg_free(msg);
2575 return -ENOBUFS;
2576 }
2577
2578 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2579 do {\
2580 if (table[attr_num]) {\
2581 cfg.param = nla_fn(table[attr_num]); \
2582 mask |= (1 << (attr_num - 1)); \
2583 } \
2584 } while (0);\
2585
2586 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2587 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2588 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2589 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2590 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2591 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2592 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2593 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2594
2595 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2596 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2597 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2598 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2599 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2600 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2601 };
2602
2603 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2604 {
2605 u32 mask;
2606 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2607 struct net_device *dev = info->user_ptr[1];
2608 struct mesh_config cfg;
2609 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2610 struct nlattr *parent_attr;
2611
2612 parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2613 if (!parent_attr)
2614 return -EINVAL;
2615 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2616 parent_attr, nl80211_meshconf_params_policy))
2617 return -EINVAL;
2618
2619 if (!rdev->ops->set_mesh_params)
2620 return -EOPNOTSUPP;
2621
2622 /* This makes sure that there aren't more than 32 mesh config
2623 * parameters (otherwise our bitfield scheme would not work.) */
2624 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2625
2626 /* Fill in the params struct */
2627 mask = 0;
2628 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2629 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2630 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2631 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2632 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2633 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2634 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2635 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2636 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2637 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2638 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2639 mask, NL80211_MESHCONF_TTL, nla_get_u8);
2640 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2641 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2642 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2643 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2644 nla_get_u8);
2645 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2646 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2647 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2648 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2649 nla_get_u16);
2650 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2651 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2652 nla_get_u32);
2653 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2654 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2655 nla_get_u16);
2656 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2657 dot11MeshHWMPnetDiameterTraversalTime,
2658 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2659 nla_get_u16);
2660 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2661 dot11MeshHWMPRootMode, mask,
2662 NL80211_MESHCONF_HWMP_ROOTMODE,
2663 nla_get_u8);
2664
2665 /* Apply changes */
2666 return rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2667 }
2668
2669 #undef FILL_IN_MESH_PARAM_IF_SET
2670
2671 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2672 {
2673 struct sk_buff *msg;
2674 void *hdr = NULL;
2675 struct nlattr *nl_reg_rules;
2676 unsigned int i;
2677 int err = -EINVAL;
2678
2679 mutex_lock(&cfg80211_mutex);
2680
2681 if (!cfg80211_regdomain)
2682 goto out;
2683
2684 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2685 if (!msg) {
2686 err = -ENOBUFS;
2687 goto out;
2688 }
2689
2690 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2691 NL80211_CMD_GET_REG);
2692 if (!hdr)
2693 goto nla_put_failure;
2694
2695 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2696 cfg80211_regdomain->alpha2);
2697
2698 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2699 if (!nl_reg_rules)
2700 goto nla_put_failure;
2701
2702 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2703 struct nlattr *nl_reg_rule;
2704 const struct ieee80211_reg_rule *reg_rule;
2705 const struct ieee80211_freq_range *freq_range;
2706 const struct ieee80211_power_rule *power_rule;
2707
2708 reg_rule = &cfg80211_regdomain->reg_rules[i];
2709 freq_range = &reg_rule->freq_range;
2710 power_rule = &reg_rule->power_rule;
2711
2712 nl_reg_rule = nla_nest_start(msg, i);
2713 if (!nl_reg_rule)
2714 goto nla_put_failure;
2715
2716 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2717 reg_rule->flags);
2718 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2719 freq_range->start_freq_khz);
2720 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2721 freq_range->end_freq_khz);
2722 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2723 freq_range->max_bandwidth_khz);
2724 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2725 power_rule->max_antenna_gain);
2726 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2727 power_rule->max_eirp);
2728
2729 nla_nest_end(msg, nl_reg_rule);
2730 }
2731
2732 nla_nest_end(msg, nl_reg_rules);
2733
2734 genlmsg_end(msg, hdr);
2735 err = genlmsg_reply(msg, info);
2736 goto out;
2737
2738 nla_put_failure:
2739 genlmsg_cancel(msg, hdr);
2740 nlmsg_free(msg);
2741 err = -EMSGSIZE;
2742 out:
2743 mutex_unlock(&cfg80211_mutex);
2744 return err;
2745 }
2746
2747 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2748 {
2749 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2750 struct nlattr *nl_reg_rule;
2751 char *alpha2 = NULL;
2752 int rem_reg_rules = 0, r = 0;
2753 u32 num_rules = 0, rule_idx = 0, size_of_regd;
2754 struct ieee80211_regdomain *rd = NULL;
2755
2756 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2757 return -EINVAL;
2758
2759 if (!info->attrs[NL80211_ATTR_REG_RULES])
2760 return -EINVAL;
2761
2762 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2763
2764 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2765 rem_reg_rules) {
2766 num_rules++;
2767 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2768 return -EINVAL;
2769 }
2770
2771 mutex_lock(&cfg80211_mutex);
2772
2773 if (!reg_is_valid_request(alpha2)) {
2774 r = -EINVAL;
2775 goto bad_reg;
2776 }
2777
2778 size_of_regd = sizeof(struct ieee80211_regdomain) +
2779 (num_rules * sizeof(struct ieee80211_reg_rule));
2780
2781 rd = kzalloc(size_of_regd, GFP_KERNEL);
2782 if (!rd) {
2783 r = -ENOMEM;
2784 goto bad_reg;
2785 }
2786
2787 rd->n_reg_rules = num_rules;
2788 rd->alpha2[0] = alpha2[0];
2789 rd->alpha2[1] = alpha2[1];
2790
2791 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2792 rem_reg_rules) {
2793 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2794 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2795 reg_rule_policy);
2796 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2797 if (r)
2798 goto bad_reg;
2799
2800 rule_idx++;
2801
2802 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2803 r = -EINVAL;
2804 goto bad_reg;
2805 }
2806 }
2807
2808 BUG_ON(rule_idx != num_rules);
2809
2810 r = set_regdom(rd);
2811
2812 mutex_unlock(&cfg80211_mutex);
2813
2814 return r;
2815
2816 bad_reg:
2817 mutex_unlock(&cfg80211_mutex);
2818 kfree(rd);
2819 return r;
2820 }
2821
2822 static int validate_scan_freqs(struct nlattr *freqs)
2823 {
2824 struct nlattr *attr1, *attr2;
2825 int n_channels = 0, tmp1, tmp2;
2826
2827 nla_for_each_nested(attr1, freqs, tmp1) {
2828 n_channels++;
2829 /*
2830 * Some hardware has a limited channel list for
2831 * scanning, and it is pretty much nonsensical
2832 * to scan for a channel twice, so disallow that
2833 * and don't require drivers to check that the
2834 * channel list they get isn't longer than what
2835 * they can scan, as long as they can scan all
2836 * the channels they registered at once.
2837 */
2838 nla_for_each_nested(attr2, freqs, tmp2)
2839 if (attr1 != attr2 &&
2840 nla_get_u32(attr1) == nla_get_u32(attr2))
2841 return 0;
2842 }
2843
2844 return n_channels;
2845 }
2846
2847 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2848 {
2849 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2850 struct net_device *dev = info->user_ptr[1];
2851 struct cfg80211_scan_request *request;
2852 struct cfg80211_ssid *ssid;
2853 struct ieee80211_channel *channel;
2854 struct nlattr *attr;
2855 struct wiphy *wiphy;
2856 int err, tmp, n_ssids = 0, n_channels, i;
2857 enum ieee80211_band band;
2858 size_t ie_len;
2859
2860 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2861 return -EINVAL;
2862
2863 wiphy = &rdev->wiphy;
2864
2865 if (!rdev->ops->scan)
2866 return -EOPNOTSUPP;
2867
2868 if (rdev->scan_req)
2869 return -EBUSY;
2870
2871 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2872 n_channels = validate_scan_freqs(
2873 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2874 if (!n_channels)
2875 return -EINVAL;
2876 } else {
2877 n_channels = 0;
2878
2879 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2880 if (wiphy->bands[band])
2881 n_channels += wiphy->bands[band]->n_channels;
2882 }
2883
2884 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2885 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2886 n_ssids++;
2887
2888 if (n_ssids > wiphy->max_scan_ssids)
2889 return -EINVAL;
2890
2891 if (info->attrs[NL80211_ATTR_IE])
2892 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2893 else
2894 ie_len = 0;
2895
2896 if (ie_len > wiphy->max_scan_ie_len)
2897 return -EINVAL;
2898
2899 request = kzalloc(sizeof(*request)
2900 + sizeof(*ssid) * n_ssids
2901 + sizeof(channel) * n_channels
2902 + ie_len, GFP_KERNEL);
2903 if (!request)
2904 return -ENOMEM;
2905
2906 if (n_ssids)
2907 request->ssids = (void *)&request->channels[n_channels];
2908 request->n_ssids = n_ssids;
2909 if (ie_len) {
2910 if (request->ssids)
2911 request->ie = (void *)(request->ssids + n_ssids);
2912 else
2913 request->ie = (void *)(request->channels + n_channels);
2914 }
2915
2916 i = 0;
2917 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2918 /* user specified, bail out if channel not found */
2919 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2920 struct ieee80211_channel *chan;
2921
2922 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2923
2924 if (!chan) {
2925 err = -EINVAL;
2926 goto out_free;
2927 }
2928
2929 /* ignore disabled channels */
2930 if (chan->flags & IEEE80211_CHAN_DISABLED)
2931 continue;
2932
2933 request->channels[i] = chan;
2934 i++;
2935 }
2936 } else {
2937 /* all channels */
2938 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2939 int j;
2940 if (!wiphy->bands[band])
2941 continue;
2942 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2943 struct ieee80211_channel *chan;
2944
2945 chan = &wiphy->bands[band]->channels[j];
2946
2947 if (chan->flags & IEEE80211_CHAN_DISABLED)
2948 continue;
2949
2950 request->channels[i] = chan;
2951 i++;
2952 }
2953 }
2954 }
2955
2956 if (!i) {
2957 err = -EINVAL;
2958 goto out_free;
2959 }
2960
2961 request->n_channels = i;
2962
2963 i = 0;
2964 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2965 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2966 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2967 err = -EINVAL;
2968 goto out_free;
2969 }
2970 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2971 request->ssids[i].ssid_len = nla_len(attr);
2972 i++;
2973 }
2974 }
2975
2976 if (info->attrs[NL80211_ATTR_IE]) {
2977 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2978 memcpy((void *)request->ie,
2979 nla_data(info->attrs[NL80211_ATTR_IE]),
2980 request->ie_len);
2981 }
2982
2983 request->dev = dev;
2984 request->wiphy = &rdev->wiphy;
2985
2986 rdev->scan_req = request;
2987 err = rdev->ops->scan(&rdev->wiphy, dev, request);
2988
2989 if (!err) {
2990 nl80211_send_scan_start(rdev, dev);
2991 dev_hold(dev);
2992 } else {
2993 out_free:
2994 rdev->scan_req = NULL;
2995 kfree(request);
2996 }
2997
2998 return err;
2999 }
3000
3001 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3002 struct cfg80211_registered_device *rdev,
3003 struct wireless_dev *wdev,
3004 struct cfg80211_internal_bss *intbss)
3005 {
3006 struct cfg80211_bss *res = &intbss->pub;
3007 void *hdr;
3008 struct nlattr *bss;
3009 int i;
3010
3011 ASSERT_WDEV_LOCK(wdev);
3012
3013 hdr = nl80211hdr_put(msg, pid, seq, flags,
3014 NL80211_CMD_NEW_SCAN_RESULTS);
3015 if (!hdr)
3016 return -1;
3017
3018 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3019 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3020
3021 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3022 if (!bss)
3023 goto nla_put_failure;
3024 if (!is_zero_ether_addr(res->bssid))
3025 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3026 if (res->information_elements && res->len_information_elements)
3027 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3028 res->len_information_elements,
3029 res->information_elements);
3030 if (res->beacon_ies && res->len_beacon_ies &&
3031 res->beacon_ies != res->information_elements)
3032 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3033 res->len_beacon_ies, res->beacon_ies);
3034 if (res->tsf)
3035 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3036 if (res->beacon_interval)
3037 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3038 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3039 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3040 NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3041 jiffies_to_msecs(jiffies - intbss->ts));
3042
3043 switch (rdev->wiphy.signal_type) {
3044 case CFG80211_SIGNAL_TYPE_MBM:
3045 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3046 break;
3047 case CFG80211_SIGNAL_TYPE_UNSPEC:
3048 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3049 break;
3050 default:
3051 break;
3052 }
3053
3054 switch (wdev->iftype) {
3055 case NL80211_IFTYPE_P2P_CLIENT:
3056 case NL80211_IFTYPE_STATION:
3057 if (intbss == wdev->current_bss)
3058 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3059 NL80211_BSS_STATUS_ASSOCIATED);
3060 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3061 if (intbss != wdev->auth_bsses[i])
3062 continue;
3063 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3064 NL80211_BSS_STATUS_AUTHENTICATED);
3065 break;
3066 }
3067 break;
3068 case NL80211_IFTYPE_ADHOC:
3069 if (intbss == wdev->current_bss)
3070 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3071 NL80211_BSS_STATUS_IBSS_JOINED);
3072 break;
3073 default:
3074 break;
3075 }
3076
3077 nla_nest_end(msg, bss);
3078
3079 return genlmsg_end(msg, hdr);
3080
3081 nla_put_failure:
3082 genlmsg_cancel(msg, hdr);
3083 return -EMSGSIZE;
3084 }
3085
3086 static int nl80211_dump_scan(struct sk_buff *skb,
3087 struct netlink_callback *cb)
3088 {
3089 struct cfg80211_registered_device *rdev;
3090 struct net_device *dev;
3091 struct cfg80211_internal_bss *scan;
3092 struct wireless_dev *wdev;
3093 int start = cb->args[1], idx = 0;
3094 int err;
3095
3096 err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3097 if (err)
3098 return err;
3099
3100 wdev = dev->ieee80211_ptr;
3101
3102 wdev_lock(wdev);
3103 spin_lock_bh(&rdev->bss_lock);
3104 cfg80211_bss_expire(rdev);
3105
3106 list_for_each_entry(scan, &rdev->bss_list, list) {
3107 if (++idx <= start)
3108 continue;
3109 if (nl80211_send_bss(skb,
3110 NETLINK_CB(cb->skb).pid,
3111 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3112 rdev, wdev, scan) < 0) {
3113 idx--;
3114 break;
3115 }
3116 }
3117
3118 spin_unlock_bh(&rdev->bss_lock);
3119 wdev_unlock(wdev);
3120
3121 cb->args[1] = idx;
3122 nl80211_finish_netdev_dump(rdev);
3123
3124 return skb->len;
3125 }
3126
3127 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3128 int flags, struct net_device *dev,
3129 struct survey_info *survey)
3130 {
3131 void *hdr;
3132 struct nlattr *infoattr;
3133
3134 /* Survey without a channel doesn't make sense */
3135 if (!survey->channel)
3136 return -EINVAL;
3137
3138 hdr = nl80211hdr_put(msg, pid, seq, flags,
3139 NL80211_CMD_NEW_SURVEY_RESULTS);
3140 if (!hdr)
3141 return -ENOMEM;
3142
3143 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3144
3145 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3146 if (!infoattr)
3147 goto nla_put_failure;
3148
3149 NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3150 survey->channel->center_freq);
3151 if (survey->filled & SURVEY_INFO_NOISE_DBM)
3152 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3153 survey->noise);
3154 if (survey->filled & SURVEY_INFO_IN_USE)
3155 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3156 if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3157 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3158 survey->channel_time);
3159 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3160 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3161 survey->channel_time_busy);
3162 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3163 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3164 survey->channel_time_ext_busy);
3165 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3166 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3167 survey->channel_time_rx);
3168 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3169 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3170 survey->channel_time_tx);
3171
3172 nla_nest_end(msg, infoattr);
3173
3174 return genlmsg_end(msg, hdr);
3175
3176 nla_put_failure:
3177 genlmsg_cancel(msg, hdr);
3178 return -EMSGSIZE;
3179 }
3180
3181 static int nl80211_dump_survey(struct sk_buff *skb,
3182 struct netlink_callback *cb)
3183 {
3184 struct survey_info survey;
3185 struct cfg80211_registered_device *dev;
3186 struct net_device *netdev;
3187 int survey_idx = cb->args[1];
3188 int res;
3189
3190 res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3191 if (res)
3192 return res;
3193
3194 if (!dev->ops->dump_survey) {
3195 res = -EOPNOTSUPP;
3196 goto out_err;
3197 }
3198
3199 while (1) {
3200 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3201 &survey);
3202 if (res == -ENOENT)
3203 break;
3204 if (res)
3205 goto out_err;
3206
3207 if (nl80211_send_survey(skb,
3208 NETLINK_CB(cb->skb).pid,
3209 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3210 netdev,
3211 &survey) < 0)
3212 goto out;
3213 survey_idx++;
3214 }
3215
3216 out:
3217 cb->args[1] = survey_idx;
3218 res = skb->len;
3219 out_err:
3220 nl80211_finish_netdev_dump(dev);
3221 return res;
3222 }
3223
3224 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3225 {
3226 return auth_type <= NL80211_AUTHTYPE_MAX;
3227 }
3228
3229 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3230 {
3231 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3232 NL80211_WPA_VERSION_2));
3233 }
3234
3235 static bool nl80211_valid_akm_suite(u32 akm)
3236 {
3237 return akm == WLAN_AKM_SUITE_8021X ||
3238 akm == WLAN_AKM_SUITE_PSK;
3239 }
3240
3241 static bool nl80211_valid_cipher_suite(u32 cipher)
3242 {
3243 return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3244 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3245 cipher == WLAN_CIPHER_SUITE_TKIP ||
3246 cipher == WLAN_CIPHER_SUITE_CCMP ||
3247 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3248 }
3249
3250
3251 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3252 {
3253 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3254 struct net_device *dev = info->user_ptr[1];
3255 struct ieee80211_channel *chan;
3256 const u8 *bssid, *ssid, *ie = NULL;
3257 int err, ssid_len, ie_len = 0;
3258 enum nl80211_auth_type auth_type;
3259 struct key_parse key;
3260 bool local_state_change;
3261
3262 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3263 return -EINVAL;
3264
3265 if (!info->attrs[NL80211_ATTR_MAC])
3266 return -EINVAL;
3267
3268 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3269 return -EINVAL;
3270
3271 if (!info->attrs[NL80211_ATTR_SSID])
3272 return -EINVAL;
3273
3274 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3275 return -EINVAL;
3276
3277 err = nl80211_parse_key(info, &key);
3278 if (err)
3279 return err;
3280
3281 if (key.idx >= 0) {
3282 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3283 return -EINVAL;
3284 if (!key.p.key || !key.p.key_len)
3285 return -EINVAL;
3286 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3287 key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3288 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3289 key.p.key_len != WLAN_KEY_LEN_WEP104))
3290 return -EINVAL;
3291 if (key.idx > 4)
3292 return -EINVAL;
3293 } else {
3294 key.p.key_len = 0;
3295 key.p.key = NULL;
3296 }
3297
3298 if (key.idx >= 0) {
3299 int i;
3300 bool ok = false;
3301 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3302 if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3303 ok = true;
3304 break;
3305 }
3306 }
3307 if (!ok)
3308 return -EINVAL;
3309 }
3310
3311 if (!rdev->ops->auth)
3312 return -EOPNOTSUPP;
3313
3314 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3315 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3316 return -EOPNOTSUPP;
3317
3318 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3319 chan = ieee80211_get_channel(&rdev->wiphy,
3320 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3321 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3322 return -EINVAL;
3323
3324 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3325 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3326
3327 if (info->attrs[NL80211_ATTR_IE]) {
3328 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3329 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3330 }
3331
3332 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3333 if (!nl80211_valid_auth_type(auth_type))
3334 return -EINVAL;
3335
3336 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3337
3338 return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3339 ssid, ssid_len, ie, ie_len,
3340 key.p.key, key.p.key_len, key.idx,
3341 local_state_change);
3342 }
3343
3344 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3345 struct genl_info *info,
3346 struct cfg80211_crypto_settings *settings,
3347 int cipher_limit)
3348 {
3349 memset(settings, 0, sizeof(*settings));
3350
3351 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3352
3353 if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3354 u16 proto;
3355 proto = nla_get_u16(
3356 info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3357 settings->control_port_ethertype = cpu_to_be16(proto);
3358 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3359 proto != ETH_P_PAE)
3360 return -EINVAL;
3361 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3362 settings->control_port_no_encrypt = true;
3363 } else
3364 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3365
3366 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3367 void *data;
3368 int len, i;
3369
3370 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3371 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3372 settings->n_ciphers_pairwise = len / sizeof(u32);
3373
3374 if (len % sizeof(u32))
3375 return -EINVAL;
3376
3377 if (settings->n_ciphers_pairwise > cipher_limit)
3378 return -EINVAL;
3379
3380 memcpy(settings->ciphers_pairwise, data, len);
3381
3382 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3383 if (!nl80211_valid_cipher_suite(
3384 settings->ciphers_pairwise[i]))
3385 return -EINVAL;
3386 }
3387
3388 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3389 settings->cipher_group =
3390 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3391 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3392 return -EINVAL;
3393 }
3394
3395 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3396 settings->wpa_versions =
3397 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3398 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3399 return -EINVAL;
3400 }
3401
3402 if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3403 void *data;
3404 int len, i;
3405
3406 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3407 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3408 settings->n_akm_suites = len / sizeof(u32);
3409
3410 if (len % sizeof(u32))
3411 return -EINVAL;
3412
3413 memcpy(settings->akm_suites, data, len);
3414
3415 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3416 if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3417 return -EINVAL;
3418 }
3419
3420 return 0;
3421 }
3422
3423 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3424 {
3425 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3426 struct net_device *dev = info->user_ptr[1];
3427 struct cfg80211_crypto_settings crypto;
3428 struct ieee80211_channel *chan;
3429 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3430 int err, ssid_len, ie_len = 0;
3431 bool use_mfp = false;
3432
3433 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3434 return -EINVAL;
3435
3436 if (!info->attrs[NL80211_ATTR_MAC] ||
3437 !info->attrs[NL80211_ATTR_SSID] ||
3438 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3439 return -EINVAL;
3440
3441 if (!rdev->ops->assoc)
3442 return -EOPNOTSUPP;
3443
3444 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3445 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3446 return -EOPNOTSUPP;
3447
3448 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3449
3450 chan = ieee80211_get_channel(&rdev->wiphy,
3451 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3452 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3453 return -EINVAL;
3454
3455 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3456 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3457
3458 if (info->attrs[NL80211_ATTR_IE]) {
3459 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3460 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3461 }
3462
3463 if (info->attrs[NL80211_ATTR_USE_MFP]) {
3464 enum nl80211_mfp mfp =
3465 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3466 if (mfp == NL80211_MFP_REQUIRED)
3467 use_mfp = true;
3468 else if (mfp != NL80211_MFP_NO)
3469 return -EINVAL;
3470 }
3471
3472 if (info->attrs[NL80211_ATTR_PREV_BSSID])
3473 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3474
3475 err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3476 if (!err)
3477 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3478 ssid, ssid_len, ie, ie_len, use_mfp,
3479 &crypto);
3480
3481 return err;
3482 }
3483
3484 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3485 {
3486 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3487 struct net_device *dev = info->user_ptr[1];
3488 const u8 *ie = NULL, *bssid;
3489 int ie_len = 0;
3490 u16 reason_code;
3491 bool local_state_change;
3492
3493 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3494 return -EINVAL;
3495
3496 if (!info->attrs[NL80211_ATTR_MAC])
3497 return -EINVAL;
3498
3499 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3500 return -EINVAL;
3501
3502 if (!rdev->ops->deauth)
3503 return -EOPNOTSUPP;
3504
3505 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3506 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3507 return -EOPNOTSUPP;
3508
3509 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3510
3511 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3512 if (reason_code == 0) {
3513 /* Reason Code 0 is reserved */
3514 return -EINVAL;
3515 }
3516
3517 if (info->attrs[NL80211_ATTR_IE]) {
3518 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3519 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3520 }
3521
3522 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3523
3524 return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3525 local_state_change);
3526 }
3527
3528 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3529 {
3530 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3531 struct net_device *dev = info->user_ptr[1];
3532 const u8 *ie = NULL, *bssid;
3533 int ie_len = 0;
3534 u16 reason_code;
3535 bool local_state_change;
3536
3537 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3538 return -EINVAL;
3539
3540 if (!info->attrs[NL80211_ATTR_MAC])
3541 return -EINVAL;
3542
3543 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3544 return -EINVAL;
3545
3546 if (!rdev->ops->disassoc)
3547 return -EOPNOTSUPP;
3548
3549 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3550 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3551 return -EOPNOTSUPP;
3552
3553 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3554
3555 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3556 if (reason_code == 0) {
3557 /* Reason Code 0 is reserved */
3558 return -EINVAL;
3559 }
3560
3561 if (info->attrs[NL80211_ATTR_IE]) {
3562 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3563 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3564 }
3565
3566 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3567
3568 return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3569 local_state_change);
3570 }
3571
3572 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3573 {
3574 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3575 struct net_device *dev = info->user_ptr[1];
3576 struct cfg80211_ibss_params ibss;
3577 struct wiphy *wiphy;
3578 struct cfg80211_cached_keys *connkeys = NULL;
3579 int err;
3580
3581 memset(&ibss, 0, sizeof(ibss));
3582
3583 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3584 return -EINVAL;
3585
3586 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3587 !info->attrs[NL80211_ATTR_SSID] ||
3588 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3589 return -EINVAL;
3590
3591 ibss.beacon_interval = 100;
3592
3593 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3594 ibss.beacon_interval =
3595 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3596 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3597 return -EINVAL;
3598 }
3599
3600 if (!rdev->ops->join_ibss)
3601 return -EOPNOTSUPP;
3602
3603 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3604 return -EOPNOTSUPP;
3605
3606 wiphy = &rdev->wiphy;
3607
3608 if (info->attrs[NL80211_ATTR_MAC])
3609 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3610 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3611 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3612
3613 if (info->attrs[NL80211_ATTR_IE]) {
3614 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3615 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3616 }
3617
3618 ibss.channel = ieee80211_get_channel(wiphy,
3619 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3620 if (!ibss.channel ||
3621 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3622 ibss.channel->flags & IEEE80211_CHAN_DISABLED)
3623 return -EINVAL;
3624
3625 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3626 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3627
3628 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3629 u8 *rates =
3630 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3631 int n_rates =
3632 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3633 struct ieee80211_supported_band *sband =
3634 wiphy->bands[ibss.channel->band];
3635 int i, j;
3636
3637 if (n_rates == 0)
3638 return -EINVAL;
3639
3640 for (i = 0; i < n_rates; i++) {
3641 int rate = (rates[i] & 0x7f) * 5;
3642 bool found = false;
3643
3644 for (j = 0; j < sband->n_bitrates; j++) {
3645 if (sband->bitrates[j].bitrate == rate) {
3646 found = true;
3647 ibss.basic_rates |= BIT(j);
3648 break;
3649 }
3650 }
3651 if (!found)
3652 return -EINVAL;
3653 }
3654 }
3655
3656 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3657 connkeys = nl80211_parse_connkeys(rdev,
3658 info->attrs[NL80211_ATTR_KEYS]);
3659 if (IS_ERR(connkeys))
3660 return PTR_ERR(connkeys);
3661 }
3662
3663 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3664 if (err)
3665 kfree(connkeys);
3666 return err;
3667 }
3668
3669 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3670 {
3671 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3672 struct net_device *dev = info->user_ptr[1];
3673
3674 if (!rdev->ops->leave_ibss)
3675 return -EOPNOTSUPP;
3676
3677 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3678 return -EOPNOTSUPP;
3679
3680 return cfg80211_leave_ibss(rdev, dev, false);
3681 }
3682
3683 #ifdef CONFIG_NL80211_TESTMODE
3684 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3685 .name = "testmode",
3686 };
3687
3688 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3689 {
3690 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3691 int err;
3692
3693 if (!info->attrs[NL80211_ATTR_TESTDATA])
3694 return -EINVAL;
3695
3696 err = -EOPNOTSUPP;
3697 if (rdev->ops->testmode_cmd) {
3698 rdev->testmode_info = info;
3699 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3700 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3701 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3702 rdev->testmode_info = NULL;
3703 }
3704
3705 return err;
3706 }
3707
3708 static struct sk_buff *
3709 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3710 int approxlen, u32 pid, u32 seq, gfp_t gfp)
3711 {
3712 struct sk_buff *skb;
3713 void *hdr;
3714 struct nlattr *data;
3715
3716 skb = nlmsg_new(approxlen + 100, gfp);
3717 if (!skb)
3718 return NULL;
3719
3720 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3721 if (!hdr) {
3722 kfree_skb(skb);
3723 return NULL;
3724 }
3725
3726 NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3727 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3728
3729 ((void **)skb->cb)[0] = rdev;
3730 ((void **)skb->cb)[1] = hdr;
3731 ((void **)skb->cb)[2] = data;
3732
3733 return skb;
3734
3735 nla_put_failure:
3736 kfree_skb(skb);
3737 return NULL;
3738 }
3739
3740 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3741 int approxlen)
3742 {
3743 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3744
3745 if (WARN_ON(!rdev->testmode_info))
3746 return NULL;
3747
3748 return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3749 rdev->testmode_info->snd_pid,
3750 rdev->testmode_info->snd_seq,
3751 GFP_KERNEL);
3752 }
3753 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3754
3755 int cfg80211_testmode_reply(struct sk_buff *skb)
3756 {
3757 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3758 void *hdr = ((void **)skb->cb)[1];
3759 struct nlattr *data = ((void **)skb->cb)[2];
3760
3761 if (WARN_ON(!rdev->testmode_info)) {
3762 kfree_skb(skb);
3763 return -EINVAL;
3764 }
3765
3766 nla_nest_end(skb, data);
3767 genlmsg_end(skb, hdr);
3768 return genlmsg_reply(skb, rdev->testmode_info);
3769 }
3770 EXPORT_SYMBOL(cfg80211_testmode_reply);
3771
3772 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
3773 int approxlen, gfp_t gfp)
3774 {
3775 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3776
3777 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
3778 }
3779 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
3780
3781 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
3782 {
3783 void *hdr = ((void **)skb->cb)[1];
3784 struct nlattr *data = ((void **)skb->cb)[2];
3785
3786 nla_nest_end(skb, data);
3787 genlmsg_end(skb, hdr);
3788 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
3789 }
3790 EXPORT_SYMBOL(cfg80211_testmode_event);
3791 #endif
3792
3793 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
3794 {
3795 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3796 struct net_device *dev = info->user_ptr[1];
3797 struct cfg80211_connect_params connect;
3798 struct wiphy *wiphy;
3799 struct cfg80211_cached_keys *connkeys = NULL;
3800 int err;
3801
3802 memset(&connect, 0, sizeof(connect));
3803
3804 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3805 return -EINVAL;
3806
3807 if (!info->attrs[NL80211_ATTR_SSID] ||
3808 !nla_len(info->attrs[NL80211_ATTR_SSID]))
3809 return -EINVAL;
3810
3811 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3812 connect.auth_type =
3813 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3814 if (!nl80211_valid_auth_type(connect.auth_type))
3815 return -EINVAL;
3816 } else
3817 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3818
3819 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
3820
3821 err = nl80211_crypto_settings(rdev, info, &connect.crypto,
3822 NL80211_MAX_NR_CIPHER_SUITES);
3823 if (err)
3824 return err;
3825
3826 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3827 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3828 return -EOPNOTSUPP;
3829
3830 wiphy = &rdev->wiphy;
3831
3832 if (info->attrs[NL80211_ATTR_MAC])
3833 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3834 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3835 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3836
3837 if (info->attrs[NL80211_ATTR_IE]) {
3838 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3839 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3840 }
3841
3842 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3843 connect.channel =
3844 ieee80211_get_channel(wiphy,
3845 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3846 if (!connect.channel ||
3847 connect.channel->flags & IEEE80211_CHAN_DISABLED)
3848 return -EINVAL;
3849 }
3850
3851 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3852 connkeys = nl80211_parse_connkeys(rdev,
3853 info->attrs[NL80211_ATTR_KEYS]);
3854 if (IS_ERR(connkeys))
3855 return PTR_ERR(connkeys);
3856 }
3857
3858 err = cfg80211_connect(rdev, dev, &connect, connkeys);
3859 if (err)
3860 kfree(connkeys);
3861 return err;
3862 }
3863
3864 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
3865 {
3866 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3867 struct net_device *dev = info->user_ptr[1];
3868 u16 reason;
3869
3870 if (!info->attrs[NL80211_ATTR_REASON_CODE])
3871 reason = WLAN_REASON_DEAUTH_LEAVING;
3872 else
3873 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3874
3875 if (reason == 0)
3876 return -EINVAL;
3877
3878 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3879 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3880 return -EOPNOTSUPP;
3881
3882 return cfg80211_disconnect(rdev, dev, reason, true);
3883 }
3884
3885 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
3886 {
3887 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3888 struct net *net;
3889 int err;
3890 u32 pid;
3891
3892 if (!info->attrs[NL80211_ATTR_PID])
3893 return -EINVAL;
3894
3895 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
3896
3897 net = get_net_ns_by_pid(pid);
3898 if (IS_ERR(net))
3899 return PTR_ERR(net);
3900
3901 err = 0;
3902
3903 /* check if anything to do */
3904 if (!net_eq(wiphy_net(&rdev->wiphy), net))
3905 err = cfg80211_switch_netns(rdev, net);
3906
3907 put_net(net);
3908 return err;
3909 }
3910
3911 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
3912 {
3913 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3914 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
3915 struct cfg80211_pmksa *pmksa) = NULL;
3916 struct net_device *dev = info->user_ptr[1];
3917 struct cfg80211_pmksa pmksa;
3918
3919 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
3920
3921 if (!info->attrs[NL80211_ATTR_MAC])
3922 return -EINVAL;
3923
3924 if (!info->attrs[NL80211_ATTR_PMKID])
3925 return -EINVAL;
3926
3927 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
3928 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3929
3930 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3931 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3932 return -EOPNOTSUPP;
3933
3934 switch (info->genlhdr->cmd) {
3935 case NL80211_CMD_SET_PMKSA:
3936 rdev_ops = rdev->ops->set_pmksa;
3937 break;
3938 case NL80211_CMD_DEL_PMKSA:
3939 rdev_ops = rdev->ops->del_pmksa;
3940 break;
3941 default:
3942 WARN_ON(1);
3943 break;
3944 }
3945
3946 if (!rdev_ops)
3947 return -EOPNOTSUPP;
3948
3949 return rdev_ops(&rdev->wiphy, dev, &pmksa);
3950 }
3951
3952 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
3953 {
3954 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3955 struct net_device *dev = info->user_ptr[1];
3956
3957 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3958 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3959 return -EOPNOTSUPP;
3960
3961 if (!rdev->ops->flush_pmksa)
3962 return -EOPNOTSUPP;
3963
3964 return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
3965 }
3966
3967 static int nl80211_remain_on_channel(struct sk_buff *skb,
3968 struct genl_info *info)
3969 {
3970 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3971 struct net_device *dev = info->user_ptr[1];
3972 struct ieee80211_channel *chan;
3973 struct sk_buff *msg;
3974 void *hdr;
3975 u64 cookie;
3976 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3977 u32 freq, duration;
3978 int err;
3979
3980 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3981 !info->attrs[NL80211_ATTR_DURATION])
3982 return -EINVAL;
3983
3984 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
3985
3986 /*
3987 * We should be on that channel for at least one jiffie,
3988 * and more than 5 seconds seems excessive.
3989 */
3990 if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
3991 return -EINVAL;
3992
3993 if (!rdev->ops->remain_on_channel)
3994 return -EOPNOTSUPP;
3995
3996 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
3997 channel_type = nla_get_u32(
3998 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
3999 if (channel_type != NL80211_CHAN_NO_HT &&
4000 channel_type != NL80211_CHAN_HT20 &&
4001 channel_type != NL80211_CHAN_HT40PLUS &&
4002 channel_type != NL80211_CHAN_HT40MINUS)
4003 return -EINVAL;
4004 }
4005
4006 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4007 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4008 if (chan == NULL)
4009 return -EINVAL;
4010
4011 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4012 if (!msg)
4013 return -ENOMEM;
4014
4015 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4016 NL80211_CMD_REMAIN_ON_CHANNEL);
4017
4018 if (IS_ERR(hdr)) {
4019 err = PTR_ERR(hdr);
4020 goto free_msg;
4021 }
4022
4023 err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4024 channel_type, duration, &cookie);
4025
4026 if (err)
4027 goto free_msg;
4028
4029 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4030
4031 genlmsg_end(msg, hdr);
4032
4033 return genlmsg_reply(msg, info);
4034
4035 nla_put_failure:
4036 err = -ENOBUFS;
4037 free_msg:
4038 nlmsg_free(msg);
4039 return err;
4040 }
4041
4042 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4043 struct genl_info *info)
4044 {
4045 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4046 struct net_device *dev = info->user_ptr[1];
4047 u64 cookie;
4048
4049 if (!info->attrs[NL80211_ATTR_COOKIE])
4050 return -EINVAL;
4051
4052 if (!rdev->ops->cancel_remain_on_channel)
4053 return -EOPNOTSUPP;
4054
4055 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4056
4057 return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4058 }
4059
4060 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4061 u8 *rates, u8 rates_len)
4062 {
4063 u8 i;
4064 u32 mask = 0;
4065
4066 for (i = 0; i < rates_len; i++) {
4067 int rate = (rates[i] & 0x7f) * 5;
4068 int ridx;
4069 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4070 struct ieee80211_rate *srate =
4071 &sband->bitrates[ridx];
4072 if (rate == srate->bitrate) {
4073 mask |= 1 << ridx;
4074 break;
4075 }
4076 }
4077 if (ridx == sband->n_bitrates)
4078 return 0; /* rate not found */
4079 }
4080
4081 return mask;
4082 }
4083
4084 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4085 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4086 .len = NL80211_MAX_SUPP_RATES },
4087 };
4088
4089 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4090 struct genl_info *info)
4091 {
4092 struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4093 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4094 struct cfg80211_bitrate_mask mask;
4095 int rem, i;
4096 struct net_device *dev = info->user_ptr[1];
4097 struct nlattr *tx_rates;
4098 struct ieee80211_supported_band *sband;
4099
4100 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4101 return -EINVAL;
4102
4103 if (!rdev->ops->set_bitrate_mask)
4104 return -EOPNOTSUPP;
4105
4106 memset(&mask, 0, sizeof(mask));
4107 /* Default to all rates enabled */
4108 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4109 sband = rdev->wiphy.bands[i];
4110 mask.control[i].legacy =
4111 sband ? (1 << sband->n_bitrates) - 1 : 0;
4112 }
4113
4114 /*
4115 * The nested attribute uses enum nl80211_band as the index. This maps
4116 * directly to the enum ieee80211_band values used in cfg80211.
4117 */
4118 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4119 {
4120 enum ieee80211_band band = nla_type(tx_rates);
4121 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4122 return -EINVAL;
4123 sband = rdev->wiphy.bands[band];
4124 if (sband == NULL)
4125 return -EINVAL;
4126 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4127 nla_len(tx_rates), nl80211_txattr_policy);
4128 if (tb[NL80211_TXRATE_LEGACY]) {
4129 mask.control[band].legacy = rateset_to_mask(
4130 sband,
4131 nla_data(tb[NL80211_TXRATE_LEGACY]),
4132 nla_len(tb[NL80211_TXRATE_LEGACY]));
4133 if (mask.control[band].legacy == 0)
4134 return -EINVAL;
4135 }
4136 }
4137
4138 return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4139 }
4140
4141 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4142 {
4143 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4144 struct net_device *dev = info->user_ptr[1];
4145 u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4146
4147 if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4148 return -EINVAL;
4149
4150 if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4151 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4152
4153 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4154 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4155 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4156 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4157 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4158 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4159 return -EOPNOTSUPP;
4160
4161 /* not much point in registering if we can't reply */
4162 if (!rdev->ops->mgmt_tx)
4163 return -EOPNOTSUPP;
4164
4165 return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4166 frame_type,
4167 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4168 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4169 }
4170
4171 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4172 {
4173 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4174 struct net_device *dev = info->user_ptr[1];
4175 struct ieee80211_channel *chan;
4176 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4177 bool channel_type_valid = false;
4178 u32 freq;
4179 int err;
4180 void *hdr;
4181 u64 cookie;
4182 struct sk_buff *msg;
4183
4184 if (!info->attrs[NL80211_ATTR_FRAME] ||
4185 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4186 return -EINVAL;
4187
4188 if (!rdev->ops->mgmt_tx)
4189 return -EOPNOTSUPP;
4190
4191 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4192 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4193 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4194 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4195 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4196 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4197 return -EOPNOTSUPP;
4198
4199 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4200 channel_type = nla_get_u32(
4201 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4202 if (channel_type != NL80211_CHAN_NO_HT &&
4203 channel_type != NL80211_CHAN_HT20 &&
4204 channel_type != NL80211_CHAN_HT40PLUS &&
4205 channel_type != NL80211_CHAN_HT40MINUS)
4206 return -EINVAL;
4207 channel_type_valid = true;
4208 }
4209
4210 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4211 chan = rdev_freq_to_chan(rdev, freq, channel_type);
4212 if (chan == NULL)
4213 return -EINVAL;
4214
4215 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4216 if (!msg)
4217 return -ENOMEM;
4218
4219 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4220 NL80211_CMD_FRAME);
4221
4222 if (IS_ERR(hdr)) {
4223 err = PTR_ERR(hdr);
4224 goto free_msg;
4225 }
4226 err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, channel_type,
4227 channel_type_valid,
4228 nla_data(info->attrs[NL80211_ATTR_FRAME]),
4229 nla_len(info->attrs[NL80211_ATTR_FRAME]),
4230 &cookie);
4231 if (err)
4232 goto free_msg;
4233
4234 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4235
4236 genlmsg_end(msg, hdr);
4237 return genlmsg_reply(msg, info);
4238
4239 nla_put_failure:
4240 err = -ENOBUFS;
4241 free_msg:
4242 nlmsg_free(msg);
4243 return err;
4244 }
4245
4246 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4247 {
4248 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4249 struct wireless_dev *wdev;
4250 struct net_device *dev = info->user_ptr[1];
4251 u8 ps_state;
4252 bool state;
4253 int err;
4254
4255 if (!info->attrs[NL80211_ATTR_PS_STATE])
4256 return -EINVAL;
4257
4258 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4259
4260 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4261 return -EINVAL;
4262
4263 wdev = dev->ieee80211_ptr;
4264
4265 if (!rdev->ops->set_power_mgmt)
4266 return -EOPNOTSUPP;
4267
4268 state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4269
4270 if (state == wdev->ps)
4271 return 0;
4272
4273 err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4274 wdev->ps_timeout);
4275 if (!err)
4276 wdev->ps = state;
4277 return err;
4278 }
4279
4280 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4281 {
4282 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4283 enum nl80211_ps_state ps_state;
4284 struct wireless_dev *wdev;
4285 struct net_device *dev = info->user_ptr[1];
4286 struct sk_buff *msg;
4287 void *hdr;
4288 int err;
4289
4290 wdev = dev->ieee80211_ptr;
4291
4292 if (!rdev->ops->set_power_mgmt)
4293 return -EOPNOTSUPP;
4294
4295 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4296 if (!msg)
4297 return -ENOMEM;
4298
4299 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4300 NL80211_CMD_GET_POWER_SAVE);
4301 if (!hdr) {
4302 err = -ENOBUFS;
4303 goto free_msg;
4304 }
4305
4306 if (wdev->ps)
4307 ps_state = NL80211_PS_ENABLED;
4308 else
4309 ps_state = NL80211_PS_DISABLED;
4310
4311 NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4312
4313 genlmsg_end(msg, hdr);
4314 return genlmsg_reply(msg, info);
4315
4316 nla_put_failure:
4317 err = -ENOBUFS;
4318 free_msg:
4319 nlmsg_free(msg);
4320 return err;
4321 }
4322
4323 static struct nla_policy
4324 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4325 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4326 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4327 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4328 };
4329
4330 static int nl80211_set_cqm_rssi(struct genl_info *info,
4331 s32 threshold, u32 hysteresis)
4332 {
4333 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4334 struct wireless_dev *wdev;
4335 struct net_device *dev = info->user_ptr[1];
4336
4337 if (threshold > 0)
4338 return -EINVAL;
4339
4340 wdev = dev->ieee80211_ptr;
4341
4342 if (!rdev->ops->set_cqm_rssi_config)
4343 return -EOPNOTSUPP;
4344
4345 if (wdev->iftype != NL80211_IFTYPE_STATION &&
4346 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4347 return -EOPNOTSUPP;
4348
4349 return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4350 threshold, hysteresis);
4351 }
4352
4353 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4354 {
4355 struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4356 struct nlattr *cqm;
4357 int err;
4358
4359 cqm = info->attrs[NL80211_ATTR_CQM];
4360 if (!cqm) {
4361 err = -EINVAL;
4362 goto out;
4363 }
4364
4365 err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4366 nl80211_attr_cqm_policy);
4367 if (err)
4368 goto out;
4369
4370 if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4371 attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4372 s32 threshold;
4373 u32 hysteresis;
4374 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4375 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4376 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4377 } else
4378 err = -EINVAL;
4379
4380 out:
4381 return err;
4382 }
4383
4384 #define NL80211_FLAG_NEED_WIPHY 0x01
4385 #define NL80211_FLAG_NEED_NETDEV 0x02
4386 #define NL80211_FLAG_NEED_RTNL 0x04
4387 #define NL80211_FLAG_CHECK_NETDEV_UP 0x08
4388 #define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\
4389 NL80211_FLAG_CHECK_NETDEV_UP)
4390
4391 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
4392 struct genl_info *info)
4393 {
4394 struct cfg80211_registered_device *rdev;
4395 struct net_device *dev;
4396 int err;
4397 bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
4398
4399 if (rtnl)
4400 rtnl_lock();
4401
4402 if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
4403 rdev = cfg80211_get_dev_from_info(info);
4404 if (IS_ERR(rdev)) {
4405 if (rtnl)
4406 rtnl_unlock();
4407 return PTR_ERR(rdev);
4408 }
4409 info->user_ptr[0] = rdev;
4410 } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
4411 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4412 if (err) {
4413 if (rtnl)
4414 rtnl_unlock();
4415 return err;
4416 }
4417 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
4418 !netif_running(dev)) {
4419 cfg80211_unlock_rdev(rdev);
4420 dev_put(dev);
4421 if (rtnl)
4422 rtnl_unlock();
4423 return -ENETDOWN;
4424 }
4425 info->user_ptr[0] = rdev;
4426 info->user_ptr[1] = dev;
4427 }
4428
4429 return 0;
4430 }
4431
4432 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
4433 struct genl_info *info)
4434 {
4435 if (info->user_ptr[0])
4436 cfg80211_unlock_rdev(info->user_ptr[0]);
4437 if (info->user_ptr[1])
4438 dev_put(info->user_ptr[1]);
4439 if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
4440 rtnl_unlock();
4441 }
4442
4443 static struct genl_ops nl80211_ops[] = {
4444 {
4445 .cmd = NL80211_CMD_GET_WIPHY,
4446 .doit = nl80211_get_wiphy,
4447 .dumpit = nl80211_dump_wiphy,
4448 .policy = nl80211_policy,
4449 /* can be retrieved by unprivileged users */
4450 .internal_flags = NL80211_FLAG_NEED_WIPHY,
4451 },
4452 {
4453 .cmd = NL80211_CMD_SET_WIPHY,
4454 .doit = nl80211_set_wiphy,
4455 .policy = nl80211_policy,
4456 .flags = GENL_ADMIN_PERM,
4457 .internal_flags = NL80211_FLAG_NEED_RTNL,
4458 },
4459 {
4460 .cmd = NL80211_CMD_GET_INTERFACE,
4461 .doit = nl80211_get_interface,
4462 .dumpit = nl80211_dump_interface,
4463 .policy = nl80211_policy,
4464 /* can be retrieved by unprivileged users */
4465 .internal_flags = NL80211_FLAG_NEED_NETDEV,
4466 },
4467 {
4468 .cmd = NL80211_CMD_SET_INTERFACE,
4469 .doit = nl80211_set_interface,
4470 .policy = nl80211_policy,
4471 .flags = GENL_ADMIN_PERM,
4472 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4473 NL80211_FLAG_NEED_RTNL,
4474 },
4475 {
4476 .cmd = NL80211_CMD_NEW_INTERFACE,
4477 .doit = nl80211_new_interface,
4478 .policy = nl80211_policy,
4479 .flags = GENL_ADMIN_PERM,
4480 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4481 NL80211_FLAG_NEED_RTNL,
4482 },
4483 {
4484 .cmd = NL80211_CMD_DEL_INTERFACE,
4485 .doit = nl80211_del_interface,
4486 .policy = nl80211_policy,
4487 .flags = GENL_ADMIN_PERM,
4488 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4489 NL80211_FLAG_NEED_RTNL,
4490 },
4491 {
4492 .cmd = NL80211_CMD_GET_KEY,
4493 .doit = nl80211_get_key,
4494 .policy = nl80211_policy,
4495 .flags = GENL_ADMIN_PERM,
4496 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4497 NL80211_FLAG_NEED_RTNL,
4498 },
4499 {
4500 .cmd = NL80211_CMD_SET_KEY,
4501 .doit = nl80211_set_key,
4502 .policy = nl80211_policy,
4503 .flags = GENL_ADMIN_PERM,
4504 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4505 NL80211_FLAG_NEED_RTNL,
4506 },
4507 {
4508 .cmd = NL80211_CMD_NEW_KEY,
4509 .doit = nl80211_new_key,
4510 .policy = nl80211_policy,
4511 .flags = GENL_ADMIN_PERM,
4512 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4513 NL80211_FLAG_NEED_RTNL,
4514 },
4515 {
4516 .cmd = NL80211_CMD_DEL_KEY,
4517 .doit = nl80211_del_key,
4518 .policy = nl80211_policy,
4519 .flags = GENL_ADMIN_PERM,
4520 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4521 NL80211_FLAG_NEED_RTNL,
4522 },
4523 {
4524 .cmd = NL80211_CMD_SET_BEACON,
4525 .policy = nl80211_policy,
4526 .flags = GENL_ADMIN_PERM,
4527 .doit = nl80211_addset_beacon,
4528 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4529 NL80211_FLAG_NEED_RTNL,
4530 },
4531 {
4532 .cmd = NL80211_CMD_NEW_BEACON,
4533 .policy = nl80211_policy,
4534 .flags = GENL_ADMIN_PERM,
4535 .doit = nl80211_addset_beacon,
4536 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4537 NL80211_FLAG_NEED_RTNL,
4538 },
4539 {
4540 .cmd = NL80211_CMD_DEL_BEACON,
4541 .policy = nl80211_policy,
4542 .flags = GENL_ADMIN_PERM,
4543 .doit = nl80211_del_beacon,
4544 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4545 NL80211_FLAG_NEED_RTNL,
4546 },
4547 {
4548 .cmd = NL80211_CMD_GET_STATION,
4549 .doit = nl80211_get_station,
4550 .dumpit = nl80211_dump_station,
4551 .policy = nl80211_policy,
4552 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4553 NL80211_FLAG_NEED_RTNL,
4554 },
4555 {
4556 .cmd = NL80211_CMD_SET_STATION,
4557 .doit = nl80211_set_station,
4558 .policy = nl80211_policy,
4559 .flags = GENL_ADMIN_PERM,
4560 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4561 NL80211_FLAG_NEED_RTNL,
4562 },
4563 {
4564 .cmd = NL80211_CMD_NEW_STATION,
4565 .doit = nl80211_new_station,
4566 .policy = nl80211_policy,
4567 .flags = GENL_ADMIN_PERM,
4568 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4569 NL80211_FLAG_NEED_RTNL,
4570 },
4571 {
4572 .cmd = NL80211_CMD_DEL_STATION,
4573 .doit = nl80211_del_station,
4574 .policy = nl80211_policy,
4575 .flags = GENL_ADMIN_PERM,
4576 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4577 NL80211_FLAG_NEED_RTNL,
4578 },
4579 {
4580 .cmd = NL80211_CMD_GET_MPATH,
4581 .doit = nl80211_get_mpath,
4582 .dumpit = nl80211_dump_mpath,
4583 .policy = nl80211_policy,
4584 .flags = GENL_ADMIN_PERM,
4585 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4586 NL80211_FLAG_NEED_RTNL,
4587 },
4588 {
4589 .cmd = NL80211_CMD_SET_MPATH,
4590 .doit = nl80211_set_mpath,
4591 .policy = nl80211_policy,
4592 .flags = GENL_ADMIN_PERM,
4593 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4594 NL80211_FLAG_NEED_RTNL,
4595 },
4596 {
4597 .cmd = NL80211_CMD_NEW_MPATH,
4598 .doit = nl80211_new_mpath,
4599 .policy = nl80211_policy,
4600 .flags = GENL_ADMIN_PERM,
4601 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4602 NL80211_FLAG_NEED_RTNL,
4603 },
4604 {
4605 .cmd = NL80211_CMD_DEL_MPATH,
4606 .doit = nl80211_del_mpath,
4607 .policy = nl80211_policy,
4608 .flags = GENL_ADMIN_PERM,
4609 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4610 NL80211_FLAG_NEED_RTNL,
4611 },
4612 {
4613 .cmd = NL80211_CMD_SET_BSS,
4614 .doit = nl80211_set_bss,
4615 .policy = nl80211_policy,
4616 .flags = GENL_ADMIN_PERM,
4617 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4618 NL80211_FLAG_NEED_RTNL,
4619 },
4620 {
4621 .cmd = NL80211_CMD_GET_REG,
4622 .doit = nl80211_get_reg,
4623 .policy = nl80211_policy,
4624 /* can be retrieved by unprivileged users */
4625 },
4626 {
4627 .cmd = NL80211_CMD_SET_REG,
4628 .doit = nl80211_set_reg,
4629 .policy = nl80211_policy,
4630 .flags = GENL_ADMIN_PERM,
4631 },
4632 {
4633 .cmd = NL80211_CMD_REQ_SET_REG,
4634 .doit = nl80211_req_set_reg,
4635 .policy = nl80211_policy,
4636 .flags = GENL_ADMIN_PERM,
4637 },
4638 {
4639 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4640 .doit = nl80211_get_mesh_params,
4641 .policy = nl80211_policy,
4642 /* can be retrieved by unprivileged users */
4643 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4644 NL80211_FLAG_NEED_RTNL,
4645 },
4646 {
4647 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4648 .doit = nl80211_set_mesh_params,
4649 .policy = nl80211_policy,
4650 .flags = GENL_ADMIN_PERM,
4651 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4652 NL80211_FLAG_NEED_RTNL,
4653 },
4654 {
4655 .cmd = NL80211_CMD_TRIGGER_SCAN,
4656 .doit = nl80211_trigger_scan,
4657 .policy = nl80211_policy,
4658 .flags = GENL_ADMIN_PERM,
4659 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4660 NL80211_FLAG_NEED_RTNL,
4661 },
4662 {
4663 .cmd = NL80211_CMD_GET_SCAN,
4664 .policy = nl80211_policy,
4665 .dumpit = nl80211_dump_scan,
4666 },
4667 {
4668 .cmd = NL80211_CMD_AUTHENTICATE,
4669 .doit = nl80211_authenticate,
4670 .policy = nl80211_policy,
4671 .flags = GENL_ADMIN_PERM,
4672 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4673 NL80211_FLAG_NEED_RTNL,
4674 },
4675 {
4676 .cmd = NL80211_CMD_ASSOCIATE,
4677 .doit = nl80211_associate,
4678 .policy = nl80211_policy,
4679 .flags = GENL_ADMIN_PERM,
4680 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4681 NL80211_FLAG_NEED_RTNL,
4682 },
4683 {
4684 .cmd = NL80211_CMD_DEAUTHENTICATE,
4685 .doit = nl80211_deauthenticate,
4686 .policy = nl80211_policy,
4687 .flags = GENL_ADMIN_PERM,
4688 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4689 NL80211_FLAG_NEED_RTNL,
4690 },
4691 {
4692 .cmd = NL80211_CMD_DISASSOCIATE,
4693 .doit = nl80211_disassociate,
4694 .policy = nl80211_policy,
4695 .flags = GENL_ADMIN_PERM,
4696 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4697 NL80211_FLAG_NEED_RTNL,
4698 },
4699 {
4700 .cmd = NL80211_CMD_JOIN_IBSS,
4701 .doit = nl80211_join_ibss,
4702 .policy = nl80211_policy,
4703 .flags = GENL_ADMIN_PERM,
4704 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4705 NL80211_FLAG_NEED_RTNL,
4706 },
4707 {
4708 .cmd = NL80211_CMD_LEAVE_IBSS,
4709 .doit = nl80211_leave_ibss,
4710 .policy = nl80211_policy,
4711 .flags = GENL_ADMIN_PERM,
4712 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4713 NL80211_FLAG_NEED_RTNL,
4714 },
4715 #ifdef CONFIG_NL80211_TESTMODE
4716 {
4717 .cmd = NL80211_CMD_TESTMODE,
4718 .doit = nl80211_testmode_do,
4719 .policy = nl80211_policy,
4720 .flags = GENL_ADMIN_PERM,
4721 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4722 NL80211_FLAG_NEED_RTNL,
4723 },
4724 #endif
4725 {
4726 .cmd = NL80211_CMD_CONNECT,
4727 .doit = nl80211_connect,
4728 .policy = nl80211_policy,
4729 .flags = GENL_ADMIN_PERM,
4730 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4731 NL80211_FLAG_NEED_RTNL,
4732 },
4733 {
4734 .cmd = NL80211_CMD_DISCONNECT,
4735 .doit = nl80211_disconnect,
4736 .policy = nl80211_policy,
4737 .flags = GENL_ADMIN_PERM,
4738 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4739 NL80211_FLAG_NEED_RTNL,
4740 },
4741 {
4742 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
4743 .doit = nl80211_wiphy_netns,
4744 .policy = nl80211_policy,
4745 .flags = GENL_ADMIN_PERM,
4746 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4747 NL80211_FLAG_NEED_RTNL,
4748 },
4749 {
4750 .cmd = NL80211_CMD_GET_SURVEY,
4751 .policy = nl80211_policy,
4752 .dumpit = nl80211_dump_survey,
4753 },
4754 {
4755 .cmd = NL80211_CMD_SET_PMKSA,
4756 .doit = nl80211_setdel_pmksa,
4757 .policy = nl80211_policy,
4758 .flags = GENL_ADMIN_PERM,
4759 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4760 NL80211_FLAG_NEED_RTNL,
4761 },
4762 {
4763 .cmd = NL80211_CMD_DEL_PMKSA,
4764 .doit = nl80211_setdel_pmksa,
4765 .policy = nl80211_policy,
4766 .flags = GENL_ADMIN_PERM,
4767 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4768 NL80211_FLAG_NEED_RTNL,
4769 },
4770 {
4771 .cmd = NL80211_CMD_FLUSH_PMKSA,
4772 .doit = nl80211_flush_pmksa,
4773 .policy = nl80211_policy,
4774 .flags = GENL_ADMIN_PERM,
4775 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4776 NL80211_FLAG_NEED_RTNL,
4777 },
4778 {
4779 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
4780 .doit = nl80211_remain_on_channel,
4781 .policy = nl80211_policy,
4782 .flags = GENL_ADMIN_PERM,
4783 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4784 NL80211_FLAG_NEED_RTNL,
4785 },
4786 {
4787 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
4788 .doit = nl80211_cancel_remain_on_channel,
4789 .policy = nl80211_policy,
4790 .flags = GENL_ADMIN_PERM,
4791 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4792 NL80211_FLAG_NEED_RTNL,
4793 },
4794 {
4795 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
4796 .doit = nl80211_set_tx_bitrate_mask,
4797 .policy = nl80211_policy,
4798 .flags = GENL_ADMIN_PERM,
4799 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4800 NL80211_FLAG_NEED_RTNL,
4801 },
4802 {
4803 .cmd = NL80211_CMD_REGISTER_FRAME,
4804 .doit = nl80211_register_mgmt,
4805 .policy = nl80211_policy,
4806 .flags = GENL_ADMIN_PERM,
4807 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4808 NL80211_FLAG_NEED_RTNL,
4809 },
4810 {
4811 .cmd = NL80211_CMD_FRAME,
4812 .doit = nl80211_tx_mgmt,
4813 .policy = nl80211_policy,
4814 .flags = GENL_ADMIN_PERM,
4815 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4816 NL80211_FLAG_NEED_RTNL,
4817 },
4818 {
4819 .cmd = NL80211_CMD_SET_POWER_SAVE,
4820 .doit = nl80211_set_power_save,
4821 .policy = nl80211_policy,
4822 .flags = GENL_ADMIN_PERM,
4823 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4824 NL80211_FLAG_NEED_RTNL,
4825 },
4826 {
4827 .cmd = NL80211_CMD_GET_POWER_SAVE,
4828 .doit = nl80211_get_power_save,
4829 .policy = nl80211_policy,
4830 /* can be retrieved by unprivileged users */
4831 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4832 NL80211_FLAG_NEED_RTNL,
4833 },
4834 {
4835 .cmd = NL80211_CMD_SET_CQM,
4836 .doit = nl80211_set_cqm,
4837 .policy = nl80211_policy,
4838 .flags = GENL_ADMIN_PERM,
4839 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4840 NL80211_FLAG_NEED_RTNL,
4841 },
4842 {
4843 .cmd = NL80211_CMD_SET_CHANNEL,
4844 .doit = nl80211_set_channel,
4845 .policy = nl80211_policy,
4846 .flags = GENL_ADMIN_PERM,
4847 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4848 NL80211_FLAG_NEED_RTNL,
4849 },
4850 {
4851 .cmd = NL80211_CMD_SET_WDS_PEER,
4852 .doit = nl80211_set_wds_peer,
4853 .policy = nl80211_policy,
4854 .flags = GENL_ADMIN_PERM,
4855 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4856 NL80211_FLAG_NEED_RTNL,
4857 },
4858 };
4859
4860 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4861 .name = "mlme",
4862 };
4863
4864 /* multicast groups */
4865 static struct genl_multicast_group nl80211_config_mcgrp = {
4866 .name = "config",
4867 };
4868 static struct genl_multicast_group nl80211_scan_mcgrp = {
4869 .name = "scan",
4870 };
4871 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4872 .name = "regulatory",
4873 };
4874
4875 /* notification functions */
4876
4877 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4878 {
4879 struct sk_buff *msg;
4880
4881 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4882 if (!msg)
4883 return;
4884
4885 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4886 nlmsg_free(msg);
4887 return;
4888 }
4889
4890 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4891 nl80211_config_mcgrp.id, GFP_KERNEL);
4892 }
4893
4894 static int nl80211_add_scan_req(struct sk_buff *msg,
4895 struct cfg80211_registered_device *rdev)
4896 {
4897 struct cfg80211_scan_request *req = rdev->scan_req;
4898 struct nlattr *nest;
4899 int i;
4900
4901 ASSERT_RDEV_LOCK(rdev);
4902
4903 if (WARN_ON(!req))
4904 return 0;
4905
4906 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
4907 if (!nest)
4908 goto nla_put_failure;
4909 for (i = 0; i < req->n_ssids; i++)
4910 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
4911 nla_nest_end(msg, nest);
4912
4913 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
4914 if (!nest)
4915 goto nla_put_failure;
4916 for (i = 0; i < req->n_channels; i++)
4917 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
4918 nla_nest_end(msg, nest);
4919
4920 if (req->ie)
4921 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
4922
4923 return 0;
4924 nla_put_failure:
4925 return -ENOBUFS;
4926 }
4927
4928 static int nl80211_send_scan_msg(struct sk_buff *msg,
4929 struct cfg80211_registered_device *rdev,
4930 struct net_device *netdev,
4931 u32 pid, u32 seq, int flags,
4932 u32 cmd)
4933 {
4934 void *hdr;
4935
4936 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
4937 if (!hdr)
4938 return -1;
4939
4940 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4941 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4942
4943 /* ignore errors and send incomplete event anyway */
4944 nl80211_add_scan_req(msg, rdev);
4945
4946 return genlmsg_end(msg, hdr);
4947
4948 nla_put_failure:
4949 genlmsg_cancel(msg, hdr);
4950 return -EMSGSIZE;
4951 }
4952
4953 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
4954 struct net_device *netdev)
4955 {
4956 struct sk_buff *msg;
4957
4958 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4959 if (!msg)
4960 return;
4961
4962 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4963 NL80211_CMD_TRIGGER_SCAN) < 0) {
4964 nlmsg_free(msg);
4965 return;
4966 }
4967
4968 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4969 nl80211_scan_mcgrp.id, GFP_KERNEL);
4970 }
4971
4972 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
4973 struct net_device *netdev)
4974 {
4975 struct sk_buff *msg;
4976
4977 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4978 if (!msg)
4979 return;
4980
4981 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4982 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4983 nlmsg_free(msg);
4984 return;
4985 }
4986
4987 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4988 nl80211_scan_mcgrp.id, GFP_KERNEL);
4989 }
4990
4991 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
4992 struct net_device *netdev)
4993 {
4994 struct sk_buff *msg;
4995
4996 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4997 if (!msg)
4998 return;
4999
5000 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5001 NL80211_CMD_SCAN_ABORTED) < 0) {
5002 nlmsg_free(msg);
5003 return;
5004 }
5005
5006 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5007 nl80211_scan_mcgrp.id, GFP_KERNEL);
5008 }
5009
5010 /*
5011 * This can happen on global regulatory changes or device specific settings
5012 * based on custom world regulatory domains.
5013 */
5014 void nl80211_send_reg_change_event(struct regulatory_request *request)
5015 {
5016 struct sk_buff *msg;
5017 void *hdr;
5018
5019 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5020 if (!msg)
5021 return;
5022
5023 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5024 if (!hdr) {
5025 nlmsg_free(msg);
5026 return;
5027 }
5028
5029 /* Userspace can always count this one always being set */
5030 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5031
5032 if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5033 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5034 NL80211_REGDOM_TYPE_WORLD);
5035 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5036 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5037 NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5038 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5039 request->intersect)
5040 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5041 NL80211_REGDOM_TYPE_INTERSECTION);
5042 else {
5043 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5044 NL80211_REGDOM_TYPE_COUNTRY);
5045 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5046 }
5047
5048 if (wiphy_idx_valid(request->wiphy_idx))
5049 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5050
5051 if (genlmsg_end(msg, hdr) < 0) {
5052 nlmsg_free(msg);
5053 return;
5054 }
5055
5056 rcu_read_lock();
5057 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5058 GFP_ATOMIC);
5059 rcu_read_unlock();
5060
5061 return;
5062
5063 nla_put_failure:
5064 genlmsg_cancel(msg, hdr);
5065 nlmsg_free(msg);
5066 }
5067
5068 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5069 struct net_device *netdev,
5070 const u8 *buf, size_t len,
5071 enum nl80211_commands cmd, gfp_t gfp)
5072 {
5073 struct sk_buff *msg;
5074 void *hdr;
5075
5076 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5077 if (!msg)
5078 return;
5079
5080 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5081 if (!hdr) {
5082 nlmsg_free(msg);
5083 return;
5084 }
5085
5086 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5087 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5088 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5089
5090 if (genlmsg_end(msg, hdr) < 0) {
5091 nlmsg_free(msg);
5092 return;
5093 }
5094
5095 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5096 nl80211_mlme_mcgrp.id, gfp);
5097 return;
5098
5099 nla_put_failure:
5100 genlmsg_cancel(msg, hdr);
5101 nlmsg_free(msg);
5102 }
5103
5104 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5105 struct net_device *netdev, const u8 *buf,
5106 size_t len, gfp_t gfp)
5107 {
5108 nl80211_send_mlme_event(rdev, netdev, buf, len,
5109 NL80211_CMD_AUTHENTICATE, gfp);
5110 }
5111
5112 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5113 struct net_device *netdev, const u8 *buf,
5114 size_t len, gfp_t gfp)
5115 {
5116 nl80211_send_mlme_event(rdev, netdev, buf, len,
5117 NL80211_CMD_ASSOCIATE, gfp);
5118 }
5119
5120 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5121 struct net_device *netdev, const u8 *buf,
5122 size_t len, gfp_t gfp)
5123 {
5124 nl80211_send_mlme_event(rdev, netdev, buf, len,
5125 NL80211_CMD_DEAUTHENTICATE, gfp);
5126 }
5127
5128 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5129 struct net_device *netdev, const u8 *buf,
5130 size_t len, gfp_t gfp)
5131 {
5132 nl80211_send_mlme_event(rdev, netdev, buf, len,
5133 NL80211_CMD_DISASSOCIATE, gfp);
5134 }
5135
5136 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5137 struct net_device *netdev, int cmd,
5138 const u8 *addr, gfp_t gfp)
5139 {
5140 struct sk_buff *msg;
5141 void *hdr;
5142
5143 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5144 if (!msg)
5145 return;
5146
5147 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5148 if (!hdr) {
5149 nlmsg_free(msg);
5150 return;
5151 }
5152
5153 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5154 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5155 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5156 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5157
5158 if (genlmsg_end(msg, hdr) < 0) {
5159 nlmsg_free(msg);
5160 return;
5161 }
5162
5163 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5164 nl80211_mlme_mcgrp.id, gfp);
5165 return;
5166
5167 nla_put_failure:
5168 genlmsg_cancel(msg, hdr);
5169 nlmsg_free(msg);
5170 }
5171
5172 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5173 struct net_device *netdev, const u8 *addr,
5174 gfp_t gfp)
5175 {
5176 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5177 addr, gfp);
5178 }
5179
5180 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5181 struct net_device *netdev, const u8 *addr,
5182 gfp_t gfp)
5183 {
5184 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5185 addr, gfp);
5186 }
5187
5188 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5189 struct net_device *netdev, const u8 *bssid,
5190 const u8 *req_ie, size_t req_ie_len,
5191 const u8 *resp_ie, size_t resp_ie_len,
5192 u16 status, gfp_t gfp)
5193 {
5194 struct sk_buff *msg;
5195 void *hdr;
5196
5197 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5198 if (!msg)
5199 return;
5200
5201 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5202 if (!hdr) {
5203 nlmsg_free(msg);
5204 return;
5205 }
5206
5207 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5208 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5209 if (bssid)
5210 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5211 NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5212 if (req_ie)
5213 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5214 if (resp_ie)
5215 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5216
5217 if (genlmsg_end(msg, hdr) < 0) {
5218 nlmsg_free(msg);
5219 return;
5220 }
5221
5222 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5223 nl80211_mlme_mcgrp.id, gfp);
5224 return;
5225
5226 nla_put_failure:
5227 genlmsg_cancel(msg, hdr);
5228 nlmsg_free(msg);
5229
5230 }
5231
5232 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5233 struct net_device *netdev, const u8 *bssid,
5234 const u8 *req_ie, size_t req_ie_len,
5235 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5236 {
5237 struct sk_buff *msg;
5238 void *hdr;
5239
5240 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5241 if (!msg)
5242 return;
5243
5244 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5245 if (!hdr) {
5246 nlmsg_free(msg);
5247 return;
5248 }
5249
5250 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5251 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5252 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5253 if (req_ie)
5254 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5255 if (resp_ie)
5256 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5257
5258 if (genlmsg_end(msg, hdr) < 0) {
5259 nlmsg_free(msg);
5260 return;
5261 }
5262
5263 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5264 nl80211_mlme_mcgrp.id, gfp);
5265 return;
5266
5267 nla_put_failure:
5268 genlmsg_cancel(msg, hdr);
5269 nlmsg_free(msg);
5270
5271 }
5272
5273 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5274 struct net_device *netdev, u16 reason,
5275 const u8 *ie, size_t ie_len, bool from_ap)
5276 {
5277 struct sk_buff *msg;
5278 void *hdr;
5279
5280 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5281 if (!msg)
5282 return;
5283
5284 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5285 if (!hdr) {
5286 nlmsg_free(msg);
5287 return;
5288 }
5289
5290 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5291 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5292 if (from_ap && reason)
5293 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5294 if (from_ap)
5295 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5296 if (ie)
5297 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5298
5299 if (genlmsg_end(msg, hdr) < 0) {
5300 nlmsg_free(msg);
5301 return;
5302 }
5303
5304 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5305 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5306 return;
5307
5308 nla_put_failure:
5309 genlmsg_cancel(msg, hdr);
5310 nlmsg_free(msg);
5311
5312 }
5313
5314 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5315 struct net_device *netdev, const u8 *bssid,
5316 gfp_t gfp)
5317 {
5318 struct sk_buff *msg;
5319 void *hdr;
5320
5321 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5322 if (!msg)
5323 return;
5324
5325 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5326 if (!hdr) {
5327 nlmsg_free(msg);
5328 return;
5329 }
5330
5331 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5332 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5333 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5334
5335 if (genlmsg_end(msg, hdr) < 0) {
5336 nlmsg_free(msg);
5337 return;
5338 }
5339
5340 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5341 nl80211_mlme_mcgrp.id, gfp);
5342 return;
5343
5344 nla_put_failure:
5345 genlmsg_cancel(msg, hdr);
5346 nlmsg_free(msg);
5347 }
5348
5349 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5350 struct net_device *netdev, const u8 *addr,
5351 enum nl80211_key_type key_type, int key_id,
5352 const u8 *tsc, gfp_t gfp)
5353 {
5354 struct sk_buff *msg;
5355 void *hdr;
5356
5357 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5358 if (!msg)
5359 return;
5360
5361 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5362 if (!hdr) {
5363 nlmsg_free(msg);
5364 return;
5365 }
5366
5367 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5368 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5369 if (addr)
5370 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5371 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5372 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5373 if (tsc)
5374 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5375
5376 if (genlmsg_end(msg, hdr) < 0) {
5377 nlmsg_free(msg);
5378 return;
5379 }
5380
5381 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5382 nl80211_mlme_mcgrp.id, gfp);
5383 return;
5384
5385 nla_put_failure:
5386 genlmsg_cancel(msg, hdr);
5387 nlmsg_free(msg);
5388 }
5389
5390 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5391 struct ieee80211_channel *channel_before,
5392 struct ieee80211_channel *channel_after)
5393 {
5394 struct sk_buff *msg;
5395 void *hdr;
5396 struct nlattr *nl_freq;
5397
5398 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5399 if (!msg)
5400 return;
5401
5402 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5403 if (!hdr) {
5404 nlmsg_free(msg);
5405 return;
5406 }
5407
5408 /*
5409 * Since we are applying the beacon hint to a wiphy we know its
5410 * wiphy_idx is valid
5411 */
5412 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5413
5414 /* Before */
5415 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5416 if (!nl_freq)
5417 goto nla_put_failure;
5418 if (nl80211_msg_put_channel(msg, channel_before))
5419 goto nla_put_failure;
5420 nla_nest_end(msg, nl_freq);
5421
5422 /* After */
5423 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5424 if (!nl_freq)
5425 goto nla_put_failure;
5426 if (nl80211_msg_put_channel(msg, channel_after))
5427 goto nla_put_failure;
5428 nla_nest_end(msg, nl_freq);
5429
5430 if (genlmsg_end(msg, hdr) < 0) {
5431 nlmsg_free(msg);
5432 return;
5433 }
5434
5435 rcu_read_lock();
5436 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5437 GFP_ATOMIC);
5438 rcu_read_unlock();
5439
5440 return;
5441
5442 nla_put_failure:
5443 genlmsg_cancel(msg, hdr);
5444 nlmsg_free(msg);
5445 }
5446
5447 static void nl80211_send_remain_on_chan_event(
5448 int cmd, struct cfg80211_registered_device *rdev,
5449 struct net_device *netdev, u64 cookie,
5450 struct ieee80211_channel *chan,
5451 enum nl80211_channel_type channel_type,
5452 unsigned int duration, gfp_t gfp)
5453 {
5454 struct sk_buff *msg;
5455 void *hdr;
5456
5457 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5458 if (!msg)
5459 return;
5460
5461 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5462 if (!hdr) {
5463 nlmsg_free(msg);
5464 return;
5465 }
5466
5467 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5468 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5469 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5470 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5471 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5472
5473 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5474 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5475
5476 if (genlmsg_end(msg, hdr) < 0) {
5477 nlmsg_free(msg);
5478 return;
5479 }
5480
5481 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5482 nl80211_mlme_mcgrp.id, gfp);
5483 return;
5484
5485 nla_put_failure:
5486 genlmsg_cancel(msg, hdr);
5487 nlmsg_free(msg);
5488 }
5489
5490 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5491 struct net_device *netdev, u64 cookie,
5492 struct ieee80211_channel *chan,
5493 enum nl80211_channel_type channel_type,
5494 unsigned int duration, gfp_t gfp)
5495 {
5496 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5497 rdev, netdev, cookie, chan,
5498 channel_type, duration, gfp);
5499 }
5500
5501 void nl80211_send_remain_on_channel_cancel(
5502 struct cfg80211_registered_device *rdev, struct net_device *netdev,
5503 u64 cookie, struct ieee80211_channel *chan,
5504 enum nl80211_channel_type channel_type, gfp_t gfp)
5505 {
5506 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5507 rdev, netdev, cookie, chan,
5508 channel_type, 0, gfp);
5509 }
5510
5511 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5512 struct net_device *dev, const u8 *mac_addr,
5513 struct station_info *sinfo, gfp_t gfp)
5514 {
5515 struct sk_buff *msg;
5516
5517 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5518 if (!msg)
5519 return;
5520
5521 if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5522 nlmsg_free(msg);
5523 return;
5524 }
5525
5526 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5527 nl80211_mlme_mcgrp.id, gfp);
5528 }
5529
5530 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
5531 struct net_device *netdev, u32 nlpid,
5532 int freq, const u8 *buf, size_t len, gfp_t gfp)
5533 {
5534 struct sk_buff *msg;
5535 void *hdr;
5536 int err;
5537
5538 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5539 if (!msg)
5540 return -ENOMEM;
5541
5542 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
5543 if (!hdr) {
5544 nlmsg_free(msg);
5545 return -ENOMEM;
5546 }
5547
5548 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5549 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5550 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5551 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5552
5553 err = genlmsg_end(msg, hdr);
5554 if (err < 0) {
5555 nlmsg_free(msg);
5556 return err;
5557 }
5558
5559 err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5560 if (err < 0)
5561 return err;
5562 return 0;
5563
5564 nla_put_failure:
5565 genlmsg_cancel(msg, hdr);
5566 nlmsg_free(msg);
5567 return -ENOBUFS;
5568 }
5569
5570 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
5571 struct net_device *netdev, u64 cookie,
5572 const u8 *buf, size_t len, bool ack,
5573 gfp_t gfp)
5574 {
5575 struct sk_buff *msg;
5576 void *hdr;
5577
5578 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5579 if (!msg)
5580 return;
5581
5582 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
5583 if (!hdr) {
5584 nlmsg_free(msg);
5585 return;
5586 }
5587
5588 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5589 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5590 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5591 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5592 if (ack)
5593 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
5594
5595 if (genlmsg_end(msg, hdr) < 0) {
5596 nlmsg_free(msg);
5597 return;
5598 }
5599
5600 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
5601 return;
5602
5603 nla_put_failure:
5604 genlmsg_cancel(msg, hdr);
5605 nlmsg_free(msg);
5606 }
5607
5608 void
5609 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
5610 struct net_device *netdev,
5611 enum nl80211_cqm_rssi_threshold_event rssi_event,
5612 gfp_t gfp)
5613 {
5614 struct sk_buff *msg;
5615 struct nlattr *pinfoattr;
5616 void *hdr;
5617
5618 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5619 if (!msg)
5620 return;
5621
5622 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
5623 if (!hdr) {
5624 nlmsg_free(msg);
5625 return;
5626 }
5627
5628 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5629 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5630
5631 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
5632 if (!pinfoattr)
5633 goto nla_put_failure;
5634
5635 NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
5636 rssi_event);
5637
5638 nla_nest_end(msg, pinfoattr);
5639
5640 if (genlmsg_end(msg, hdr) < 0) {
5641 nlmsg_free(msg);
5642 return;
5643 }
5644
5645 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5646 nl80211_mlme_mcgrp.id, gfp);
5647 return;
5648
5649 nla_put_failure:
5650 genlmsg_cancel(msg, hdr);
5651 nlmsg_free(msg);
5652 }
5653
5654 static int nl80211_netlink_notify(struct notifier_block * nb,
5655 unsigned long state,
5656 void *_notify)
5657 {
5658 struct netlink_notify *notify = _notify;
5659 struct cfg80211_registered_device *rdev;
5660 struct wireless_dev *wdev;
5661
5662 if (state != NETLINK_URELEASE)
5663 return NOTIFY_DONE;
5664
5665 rcu_read_lock();
5666
5667 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
5668 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
5669 cfg80211_mlme_unregister_socket(wdev, notify->pid);
5670
5671 rcu_read_unlock();
5672
5673 return NOTIFY_DONE;
5674 }
5675
5676 static struct notifier_block nl80211_netlink_notifier = {
5677 .notifier_call = nl80211_netlink_notify,
5678 };
5679
5680 /* initialisation/exit functions */
5681
5682 int nl80211_init(void)
5683 {
5684 int err;
5685
5686 err = genl_register_family_with_ops(&nl80211_fam,
5687 nl80211_ops, ARRAY_SIZE(nl80211_ops));
5688 if (err)
5689 return err;
5690
5691 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
5692 if (err)
5693 goto err_out;
5694
5695 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
5696 if (err)
5697 goto err_out;
5698
5699 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
5700 if (err)
5701 goto err_out;
5702
5703 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
5704 if (err)
5705 goto err_out;
5706
5707 #ifdef CONFIG_NL80211_TESTMODE
5708 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
5709 if (err)
5710 goto err_out;
5711 #endif
5712
5713 err = netlink_register_notifier(&nl80211_netlink_notifier);
5714 if (err)
5715 goto err_out;
5716
5717 return 0;
5718 err_out:
5719 genl_unregister_family(&nl80211_fam);
5720 return err;
5721 }
5722
5723 void nl80211_exit(void)
5724 {
5725 netlink_unregister_notifier(&nl80211_netlink_notifier);
5726 genl_unregister_family(&nl80211_fam);
5727 }
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