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 bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
28 struct genl_info *info,
29 struct cfg80211_crypto_settings *settings,
30 int cipher_limit);
31
32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
33 struct genl_info *info);
34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
35 struct genl_info *info);
36
37 /* the netlink family */
38 static struct genl_family nl80211_fam = {
39 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
40 .name = "nl80211", /* have users key off the name instead */
41 .hdrsize = 0, /* no private header */
42 .version = 1, /* no particular meaning now */
43 .maxattr = NL80211_ATTR_MAX,
44 .netnsok = true,
45 .pre_doit = nl80211_pre_doit,
46 .post_doit = nl80211_post_doit,
47 };
48
49 /* internal helper: get rdev and dev */
get_rdev_dev_by_ifindex(struct net * netns,struct nlattr ** attrs,struct cfg80211_registered_device ** rdev,struct net_device ** dev)50 static int get_rdev_dev_by_ifindex(struct net *netns, struct nlattr **attrs,
51 struct cfg80211_registered_device **rdev,
52 struct net_device **dev)
53 {
54 int ifindex;
55
56 if (!attrs[NL80211_ATTR_IFINDEX])
57 return -EINVAL;
58
59 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
60 *dev = dev_get_by_index(netns, ifindex);
61 if (!*dev)
62 return -ENODEV;
63
64 *rdev = cfg80211_get_dev_from_ifindex(netns, ifindex);
65 if (IS_ERR(*rdev)) {
66 dev_put(*dev);
67 return PTR_ERR(*rdev);
68 }
69
70 return 0;
71 }
72
73 /* policy for the attributes */
74 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
75 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
76 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
77 .len = 20-1 },
78 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
79 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
80 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
81 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
82 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
83 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
84 [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
85 [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
86
87 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
88 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
89 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
90
91 [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
92 [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
93
94 [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
95 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
96 .len = WLAN_MAX_KEY_LEN },
97 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
98 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
99 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
100 [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
101 [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
102
103 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
104 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
105 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
106 .len = IEEE80211_MAX_DATA_LEN },
107 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
108 .len = IEEE80211_MAX_DATA_LEN },
109 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
110 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
111 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
112 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
113 .len = NL80211_MAX_SUPP_RATES },
114 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
115 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
116 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
117 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
118 .len = IEEE80211_MAX_MESH_ID_LEN },
119 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
120
121 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
122 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
123
124 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
125 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
126 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
127 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
128 .len = NL80211_MAX_SUPP_RATES },
129 [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
130
131 [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
132 [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
133
134 [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
135
136 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
137 [NL80211_ATTR_IE] = { .type = NLA_BINARY,
138 .len = IEEE80211_MAX_DATA_LEN },
139 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
140 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
141
142 [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
143 .len = IEEE80211_MAX_SSID_LEN },
144 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
145 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
146 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
147 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
148 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
149 [NL80211_ATTR_STA_FLAGS2] = {
150 .len = sizeof(struct nl80211_sta_flag_update),
151 },
152 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
153 [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
154 [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
155 [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
156 [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
157 [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
158 [NL80211_ATTR_PID] = { .type = NLA_U32 },
159 [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
160 [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
161 .len = WLAN_PMKID_LEN },
162 [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
163 [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
164 [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
165 [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
166 .len = IEEE80211_MAX_DATA_LEN },
167 [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
168 [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
169 [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
170 [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
171 [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
172 [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
173 [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
174 [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
175 [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
176 [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
177 [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
178 [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
179 [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
180 [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
181 [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
182 [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
183 [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
184 [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
185 [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
186 [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
187 .len = IEEE80211_MAX_DATA_LEN },
188 [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
189 .len = IEEE80211_MAX_DATA_LEN },
190 [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
191 [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
192 [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
193 [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
194 [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
195 [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
196 [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
197 [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
198 [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
199 [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
200 .len = IEEE80211_MAX_DATA_LEN },
201 [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
202 [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
203 [NL80211_ATTR_HT_CAPABILITY_MASK] = {
204 .len = NL80211_HT_CAPABILITY_LEN
205 },
206 [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
207 [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
208 [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
209 };
210
211 /* policy for the key attributes */
212 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
213 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
214 [NL80211_KEY_IDX] = { .type = NLA_U8 },
215 [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
216 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
217 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
218 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
219 [NL80211_KEY_TYPE] = { .type = NLA_U32 },
220 [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
221 };
222
223 /* policy for the key default flags */
224 static const struct nla_policy
225 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
226 [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
227 [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
228 };
229
230 /* policy for WoWLAN attributes */
231 static const struct nla_policy
232 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
233 [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
234 [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
235 [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
236 [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
237 [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
238 [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
239 [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
240 [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
241 };
242
243 /* policy for GTK rekey offload attributes */
244 static const struct nla_policy
245 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
246 [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
247 [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
248 [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
249 };
250
251 static const struct nla_policy
252 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
253 [NL80211_ATTR_SCHED_SCAN_MATCH_SSID] = { .type = NLA_BINARY,
254 .len = IEEE80211_MAX_SSID_LEN },
255 };
256
257 /* ifidx get helper */
nl80211_get_ifidx(struct netlink_callback * cb)258 static int nl80211_get_ifidx(struct netlink_callback *cb)
259 {
260 int res;
261
262 res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
263 nl80211_fam.attrbuf, nl80211_fam.maxattr,
264 nl80211_policy);
265 if (res)
266 return res;
267
268 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
269 return -EINVAL;
270
271 res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
272 if (!res)
273 return -EINVAL;
274 return res;
275 }
276
nl80211_prepare_netdev_dump(struct sk_buff * skb,struct netlink_callback * cb,struct cfg80211_registered_device ** rdev,struct net_device ** dev)277 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
278 struct netlink_callback *cb,
279 struct cfg80211_registered_device **rdev,
280 struct net_device **dev)
281 {
282 int ifidx = cb->args[0];
283 int err;
284
285 if (!ifidx)
286 ifidx = nl80211_get_ifidx(cb);
287 if (ifidx < 0)
288 return ifidx;
289
290 cb->args[0] = ifidx;
291
292 rtnl_lock();
293
294 *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
295 if (!*dev) {
296 err = -ENODEV;
297 goto out_rtnl;
298 }
299
300 *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
301 if (IS_ERR(*rdev)) {
302 err = PTR_ERR(*rdev);
303 goto out_rtnl;
304 }
305
306 return 0;
307 out_rtnl:
308 rtnl_unlock();
309 return err;
310 }
311
nl80211_finish_netdev_dump(struct cfg80211_registered_device * rdev)312 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
313 {
314 cfg80211_unlock_rdev(rdev);
315 rtnl_unlock();
316 }
317
318 /* IE validation */
is_valid_ie_attr(const struct nlattr * attr)319 static bool is_valid_ie_attr(const struct nlattr *attr)
320 {
321 const u8 *pos;
322 int len;
323
324 if (!attr)
325 return true;
326
327 pos = nla_data(attr);
328 len = nla_len(attr);
329
330 while (len) {
331 u8 elemlen;
332
333 if (len < 2)
334 return false;
335 len -= 2;
336
337 elemlen = pos[1];
338 if (elemlen > len)
339 return false;
340
341 len -= elemlen;
342 pos += 2 + elemlen;
343 }
344
345 return true;
346 }
347
348 /* message building helper */
nl80211hdr_put(struct sk_buff * skb,u32 pid,u32 seq,int flags,u8 cmd)349 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
350 int flags, u8 cmd)
351 {
352 /* since there is no private header just add the generic one */
353 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
354 }
355
nl80211_msg_put_channel(struct sk_buff * msg,struct ieee80211_channel * chan)356 static int nl80211_msg_put_channel(struct sk_buff *msg,
357 struct ieee80211_channel *chan)
358 {
359 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
360 chan->center_freq);
361
362 if (chan->flags & IEEE80211_CHAN_DISABLED)
363 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
364 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
365 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
366 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
367 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
368 if (chan->flags & IEEE80211_CHAN_RADAR)
369 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
370
371 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
372 DBM_TO_MBM(chan->max_power));
373
374 return 0;
375
376 nla_put_failure:
377 return -ENOBUFS;
378 }
379
380 /* netlink command implementations */
381
382 struct key_parse {
383 struct key_params p;
384 int idx;
385 int type;
386 bool def, defmgmt;
387 bool def_uni, def_multi;
388 };
389
nl80211_parse_key_new(struct nlattr * key,struct key_parse * k)390 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
391 {
392 struct nlattr *tb[NL80211_KEY_MAX + 1];
393 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
394 nl80211_key_policy);
395 if (err)
396 return err;
397
398 k->def = !!tb[NL80211_KEY_DEFAULT];
399 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
400
401 if (k->def) {
402 k->def_uni = true;
403 k->def_multi = true;
404 }
405 if (k->defmgmt)
406 k->def_multi = true;
407
408 if (tb[NL80211_KEY_IDX])
409 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
410
411 if (tb[NL80211_KEY_DATA]) {
412 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
413 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
414 }
415
416 if (tb[NL80211_KEY_SEQ]) {
417 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
418 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
419 }
420
421 if (tb[NL80211_KEY_CIPHER])
422 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
423
424 if (tb[NL80211_KEY_TYPE]) {
425 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
426 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
427 return -EINVAL;
428 }
429
430 if (tb[NL80211_KEY_DEFAULT_TYPES]) {
431 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
432 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
433 tb[NL80211_KEY_DEFAULT_TYPES],
434 nl80211_key_default_policy);
435 if (err)
436 return err;
437
438 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
439 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
440 }
441
442 return 0;
443 }
444
nl80211_parse_key_old(struct genl_info * info,struct key_parse * k)445 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
446 {
447 if (info->attrs[NL80211_ATTR_KEY_DATA]) {
448 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
449 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
450 }
451
452 if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
453 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
454 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
455 }
456
457 if (info->attrs[NL80211_ATTR_KEY_IDX])
458 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
459
460 if (info->attrs[NL80211_ATTR_KEY_CIPHER])
461 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
462
463 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
464 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
465
466 if (k->def) {
467 k->def_uni = true;
468 k->def_multi = true;
469 }
470 if (k->defmgmt)
471 k->def_multi = true;
472
473 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
474 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
475 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
476 return -EINVAL;
477 }
478
479 if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
480 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
481 int err = nla_parse_nested(
482 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
483 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
484 nl80211_key_default_policy);
485 if (err)
486 return err;
487
488 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
489 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
490 }
491
492 return 0;
493 }
494
nl80211_parse_key(struct genl_info * info,struct key_parse * k)495 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
496 {
497 int err;
498
499 memset(k, 0, sizeof(*k));
500 k->idx = -1;
501 k->type = -1;
502
503 if (info->attrs[NL80211_ATTR_KEY])
504 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
505 else
506 err = nl80211_parse_key_old(info, k);
507
508 if (err)
509 return err;
510
511 if (k->def && k->defmgmt)
512 return -EINVAL;
513
514 if (k->defmgmt) {
515 if (k->def_uni || !k->def_multi)
516 return -EINVAL;
517 }
518
519 if (k->idx != -1) {
520 if (k->defmgmt) {
521 if (k->idx < 4 || k->idx > 5)
522 return -EINVAL;
523 } else if (k->def) {
524 if (k->idx < 0 || k->idx > 3)
525 return -EINVAL;
526 } else {
527 if (k->idx < 0 || k->idx > 5)
528 return -EINVAL;
529 }
530 }
531
532 return 0;
533 }
534
535 static struct cfg80211_cached_keys *
nl80211_parse_connkeys(struct cfg80211_registered_device * rdev,struct nlattr * keys)536 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
537 struct nlattr *keys)
538 {
539 struct key_parse parse;
540 struct nlattr *key;
541 struct cfg80211_cached_keys *result;
542 int rem, err, def = 0;
543
544 result = kzalloc(sizeof(*result), GFP_KERNEL);
545 if (!result)
546 return ERR_PTR(-ENOMEM);
547
548 result->def = -1;
549 result->defmgmt = -1;
550
551 nla_for_each_nested(key, keys, rem) {
552 memset(&parse, 0, sizeof(parse));
553 parse.idx = -1;
554
555 err = nl80211_parse_key_new(key, &parse);
556 if (err)
557 goto error;
558 err = -EINVAL;
559 if (!parse.p.key)
560 goto error;
561 if (parse.idx < 0 || parse.idx > 4)
562 goto error;
563 if (parse.def) {
564 if (def)
565 goto error;
566 def = 1;
567 result->def = parse.idx;
568 if (!parse.def_uni || !parse.def_multi)
569 goto error;
570 } else if (parse.defmgmt)
571 goto error;
572 err = cfg80211_validate_key_settings(rdev, &parse.p,
573 parse.idx, false, NULL);
574 if (err)
575 goto error;
576 result->params[parse.idx].cipher = parse.p.cipher;
577 result->params[parse.idx].key_len = parse.p.key_len;
578 result->params[parse.idx].key = result->data[parse.idx];
579 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
580 }
581
582 return result;
583 error:
584 kfree(result);
585 return ERR_PTR(err);
586 }
587
nl80211_key_allowed(struct wireless_dev * wdev)588 static int nl80211_key_allowed(struct wireless_dev *wdev)
589 {
590 ASSERT_WDEV_LOCK(wdev);
591
592 switch (wdev->iftype) {
593 case NL80211_IFTYPE_AP:
594 case NL80211_IFTYPE_AP_VLAN:
595 case NL80211_IFTYPE_P2P_GO:
596 case NL80211_IFTYPE_MESH_POINT:
597 break;
598 case NL80211_IFTYPE_ADHOC:
599 if (!wdev->current_bss)
600 return -ENOLINK;
601 break;
602 case NL80211_IFTYPE_STATION:
603 case NL80211_IFTYPE_P2P_CLIENT:
604 if (wdev->sme_state != CFG80211_SME_CONNECTED)
605 return -ENOLINK;
606 break;
607 default:
608 return -EINVAL;
609 }
610
611 return 0;
612 }
613
nl80211_put_iftypes(struct sk_buff * msg,u32 attr,u16 ifmodes)614 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
615 {
616 struct nlattr *nl_modes = nla_nest_start(msg, attr);
617 int i;
618
619 if (!nl_modes)
620 goto nla_put_failure;
621
622 i = 0;
623 while (ifmodes) {
624 if (ifmodes & 1)
625 NLA_PUT_FLAG(msg, i);
626 ifmodes >>= 1;
627 i++;
628 }
629
630 nla_nest_end(msg, nl_modes);
631 return 0;
632
633 nla_put_failure:
634 return -ENOBUFS;
635 }
636
nl80211_put_iface_combinations(struct wiphy * wiphy,struct sk_buff * msg)637 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
638 struct sk_buff *msg)
639 {
640 struct nlattr *nl_combis;
641 int i, j;
642
643 nl_combis = nla_nest_start(msg,
644 NL80211_ATTR_INTERFACE_COMBINATIONS);
645 if (!nl_combis)
646 goto nla_put_failure;
647
648 for (i = 0; i < wiphy->n_iface_combinations; i++) {
649 const struct ieee80211_iface_combination *c;
650 struct nlattr *nl_combi, *nl_limits;
651
652 c = &wiphy->iface_combinations[i];
653
654 nl_combi = nla_nest_start(msg, i + 1);
655 if (!nl_combi)
656 goto nla_put_failure;
657
658 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
659 if (!nl_limits)
660 goto nla_put_failure;
661
662 for (j = 0; j < c->n_limits; j++) {
663 struct nlattr *nl_limit;
664
665 nl_limit = nla_nest_start(msg, j + 1);
666 if (!nl_limit)
667 goto nla_put_failure;
668 NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
669 c->limits[j].max);
670 if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
671 c->limits[j].types))
672 goto nla_put_failure;
673 nla_nest_end(msg, nl_limit);
674 }
675
676 nla_nest_end(msg, nl_limits);
677
678 if (c->beacon_int_infra_match)
679 NLA_PUT_FLAG(msg,
680 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
681 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
682 c->num_different_channels);
683 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
684 c->max_interfaces);
685
686 nla_nest_end(msg, nl_combi);
687 }
688
689 nla_nest_end(msg, nl_combis);
690
691 return 0;
692 nla_put_failure:
693 return -ENOBUFS;
694 }
695
nl80211_send_wiphy(struct sk_buff * msg,u32 pid,u32 seq,int flags,struct cfg80211_registered_device * dev)696 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
697 struct cfg80211_registered_device *dev)
698 {
699 void *hdr;
700 struct nlattr *nl_bands, *nl_band;
701 struct nlattr *nl_freqs, *nl_freq;
702 struct nlattr *nl_rates, *nl_rate;
703 struct nlattr *nl_cmds;
704 enum ieee80211_band band;
705 struct ieee80211_channel *chan;
706 struct ieee80211_rate *rate;
707 int i;
708 const struct ieee80211_txrx_stypes *mgmt_stypes =
709 dev->wiphy.mgmt_stypes;
710
711 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
712 if (!hdr)
713 return -1;
714
715 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
716 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
717
718 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
719 cfg80211_rdev_list_generation);
720
721 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
722 dev->wiphy.retry_short);
723 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
724 dev->wiphy.retry_long);
725 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
726 dev->wiphy.frag_threshold);
727 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
728 dev->wiphy.rts_threshold);
729 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
730 dev->wiphy.coverage_class);
731 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
732 dev->wiphy.max_scan_ssids);
733 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
734 dev->wiphy.max_sched_scan_ssids);
735 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
736 dev->wiphy.max_scan_ie_len);
737 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
738 dev->wiphy.max_sched_scan_ie_len);
739 NLA_PUT_U8(msg, NL80211_ATTR_MAX_MATCH_SETS,
740 dev->wiphy.max_match_sets);
741
742 if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
743 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
744 if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
745 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
746 if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
747 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
748 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
749 NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
750 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)
751 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_SUPPORT);
752 if (dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)
753 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP);
754
755 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
756 sizeof(u32) * dev->wiphy.n_cipher_suites,
757 dev->wiphy.cipher_suites);
758
759 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
760 dev->wiphy.max_num_pmkids);
761
762 if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
763 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
764
765 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
766 dev->wiphy.available_antennas_tx);
767 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
768 dev->wiphy.available_antennas_rx);
769
770 if (dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD)
771 NLA_PUT_U32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
772 dev->wiphy.probe_resp_offload);
773
774 if ((dev->wiphy.available_antennas_tx ||
775 dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
776 u32 tx_ant = 0, rx_ant = 0;
777 int res;
778 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
779 if (!res) {
780 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
781 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
782 }
783 }
784
785 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
786 dev->wiphy.interface_modes))
787 goto nla_put_failure;
788
789 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
790 if (!nl_bands)
791 goto nla_put_failure;
792
793 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
794 if (!dev->wiphy.bands[band])
795 continue;
796
797 nl_band = nla_nest_start(msg, band);
798 if (!nl_band)
799 goto nla_put_failure;
800
801 /* add HT info */
802 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
803 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
804 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
805 &dev->wiphy.bands[band]->ht_cap.mcs);
806 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
807 dev->wiphy.bands[band]->ht_cap.cap);
808 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
809 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
810 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
811 dev->wiphy.bands[band]->ht_cap.ampdu_density);
812 }
813
814 /* add frequencies */
815 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
816 if (!nl_freqs)
817 goto nla_put_failure;
818
819 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
820 nl_freq = nla_nest_start(msg, i);
821 if (!nl_freq)
822 goto nla_put_failure;
823
824 chan = &dev->wiphy.bands[band]->channels[i];
825
826 if (nl80211_msg_put_channel(msg, chan))
827 goto nla_put_failure;
828
829 nla_nest_end(msg, nl_freq);
830 }
831
832 nla_nest_end(msg, nl_freqs);
833
834 /* add bitrates */
835 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
836 if (!nl_rates)
837 goto nla_put_failure;
838
839 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
840 nl_rate = nla_nest_start(msg, i);
841 if (!nl_rate)
842 goto nla_put_failure;
843
844 rate = &dev->wiphy.bands[band]->bitrates[i];
845 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
846 rate->bitrate);
847 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
848 NLA_PUT_FLAG(msg,
849 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
850
851 nla_nest_end(msg, nl_rate);
852 }
853
854 nla_nest_end(msg, nl_rates);
855
856 nla_nest_end(msg, nl_band);
857 }
858 nla_nest_end(msg, nl_bands);
859
860 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
861 if (!nl_cmds)
862 goto nla_put_failure;
863
864 i = 0;
865 #define CMD(op, n) \
866 do { \
867 if (dev->ops->op) { \
868 i++; \
869 NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
870 } \
871 } while (0)
872
873 CMD(add_virtual_intf, NEW_INTERFACE);
874 CMD(change_virtual_intf, SET_INTERFACE);
875 CMD(add_key, NEW_KEY);
876 CMD(start_ap, START_AP);
877 CMD(add_station, NEW_STATION);
878 CMD(add_mpath, NEW_MPATH);
879 CMD(update_mesh_config, SET_MESH_CONFIG);
880 CMD(change_bss, SET_BSS);
881 CMD(auth, AUTHENTICATE);
882 CMD(assoc, ASSOCIATE);
883 CMD(deauth, DEAUTHENTICATE);
884 CMD(disassoc, DISASSOCIATE);
885 CMD(join_ibss, JOIN_IBSS);
886 CMD(join_mesh, JOIN_MESH);
887 CMD(set_pmksa, SET_PMKSA);
888 CMD(del_pmksa, DEL_PMKSA);
889 CMD(flush_pmksa, FLUSH_PMKSA);
890 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
891 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
892 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
893 CMD(mgmt_tx, FRAME);
894 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
895 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
896 i++;
897 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
898 }
899 CMD(set_channel, SET_CHANNEL);
900 CMD(set_wds_peer, SET_WDS_PEER);
901 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
902 CMD(tdls_mgmt, TDLS_MGMT);
903 CMD(tdls_oper, TDLS_OPER);
904 }
905 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
906 CMD(sched_scan_start, START_SCHED_SCAN);
907 CMD(probe_client, PROBE_CLIENT);
908 CMD(set_noack_map, SET_NOACK_MAP);
909 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
910 i++;
911 NLA_PUT_U32(msg, i, NL80211_CMD_REGISTER_BEACONS);
912 }
913
914 #ifdef CONFIG_NL80211_TESTMODE
915 CMD(testmode_cmd, TESTMODE);
916 #endif
917
918 #undef CMD
919
920 if (dev->ops->connect || dev->ops->auth) {
921 i++;
922 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
923 }
924
925 if (dev->ops->disconnect || dev->ops->deauth) {
926 i++;
927 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
928 }
929
930 nla_nest_end(msg, nl_cmds);
931
932 if (dev->ops->remain_on_channel &&
933 dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
934 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
935 dev->wiphy.max_remain_on_channel_duration);
936
937 if (dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX)
938 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
939
940 if (mgmt_stypes) {
941 u16 stypes;
942 struct nlattr *nl_ftypes, *nl_ifs;
943 enum nl80211_iftype ift;
944
945 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
946 if (!nl_ifs)
947 goto nla_put_failure;
948
949 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
950 nl_ftypes = nla_nest_start(msg, ift);
951 if (!nl_ftypes)
952 goto nla_put_failure;
953 i = 0;
954 stypes = mgmt_stypes[ift].tx;
955 while (stypes) {
956 if (stypes & 1)
957 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
958 (i << 4) | IEEE80211_FTYPE_MGMT);
959 stypes >>= 1;
960 i++;
961 }
962 nla_nest_end(msg, nl_ftypes);
963 }
964
965 nla_nest_end(msg, nl_ifs);
966
967 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
968 if (!nl_ifs)
969 goto nla_put_failure;
970
971 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
972 nl_ftypes = nla_nest_start(msg, ift);
973 if (!nl_ftypes)
974 goto nla_put_failure;
975 i = 0;
976 stypes = mgmt_stypes[ift].rx;
977 while (stypes) {
978 if (stypes & 1)
979 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
980 (i << 4) | IEEE80211_FTYPE_MGMT);
981 stypes >>= 1;
982 i++;
983 }
984 nla_nest_end(msg, nl_ftypes);
985 }
986 nla_nest_end(msg, nl_ifs);
987 }
988
989 if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
990 struct nlattr *nl_wowlan;
991
992 nl_wowlan = nla_nest_start(msg,
993 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
994 if (!nl_wowlan)
995 goto nla_put_failure;
996
997 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
998 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
999 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
1000 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
1001 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
1002 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
1003 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
1004 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
1005 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
1006 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
1007 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
1008 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
1009 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
1010 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
1011 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
1012 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
1013 if (dev->wiphy.wowlan.n_patterns) {
1014 struct nl80211_wowlan_pattern_support pat = {
1015 .max_patterns = dev->wiphy.wowlan.n_patterns,
1016 .min_pattern_len =
1017 dev->wiphy.wowlan.pattern_min_len,
1018 .max_pattern_len =
1019 dev->wiphy.wowlan.pattern_max_len,
1020 };
1021 NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1022 sizeof(pat), &pat);
1023 }
1024
1025 nla_nest_end(msg, nl_wowlan);
1026 }
1027
1028 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1029 dev->wiphy.software_iftypes))
1030 goto nla_put_failure;
1031
1032 if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1033 goto nla_put_failure;
1034
1035 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME)
1036 NLA_PUT_U32(msg, NL80211_ATTR_DEVICE_AP_SME,
1037 dev->wiphy.ap_sme_capa);
1038
1039 NLA_PUT_U32(msg, NL80211_ATTR_FEATURE_FLAGS, dev->wiphy.features);
1040
1041 if (dev->wiphy.ht_capa_mod_mask)
1042 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1043 sizeof(*dev->wiphy.ht_capa_mod_mask),
1044 dev->wiphy.ht_capa_mod_mask);
1045
1046 return genlmsg_end(msg, hdr);
1047
1048 nla_put_failure:
1049 genlmsg_cancel(msg, hdr);
1050 return -EMSGSIZE;
1051 }
1052
nl80211_dump_wiphy(struct sk_buff * skb,struct netlink_callback * cb)1053 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1054 {
1055 int idx = 0;
1056 int start = cb->args[0];
1057 struct cfg80211_registered_device *dev;
1058
1059 mutex_lock(&cfg80211_mutex);
1060 list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1061 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1062 continue;
1063 if (++idx <= start)
1064 continue;
1065 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1066 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1067 dev) < 0) {
1068 idx--;
1069 break;
1070 }
1071 }
1072 mutex_unlock(&cfg80211_mutex);
1073
1074 cb->args[0] = idx;
1075
1076 return skb->len;
1077 }
1078
nl80211_get_wiphy(struct sk_buff * skb,struct genl_info * info)1079 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1080 {
1081 struct sk_buff *msg;
1082 struct cfg80211_registered_device *dev = info->user_ptr[0];
1083
1084 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1085 if (!msg)
1086 return -ENOMEM;
1087
1088 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1089 nlmsg_free(msg);
1090 return -ENOBUFS;
1091 }
1092
1093 return genlmsg_reply(msg, info);
1094 }
1095
1096 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1097 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
1098 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
1099 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
1100 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
1101 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
1102 };
1103
parse_txq_params(struct nlattr * tb[],struct ieee80211_txq_params * txq_params)1104 static int parse_txq_params(struct nlattr *tb[],
1105 struct ieee80211_txq_params *txq_params)
1106 {
1107 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1108 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1109 !tb[NL80211_TXQ_ATTR_AIFS])
1110 return -EINVAL;
1111
1112 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
1113 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1114 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1115 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1116 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1117
1118 return 0;
1119 }
1120
nl80211_can_set_dev_channel(struct wireless_dev * wdev)1121 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1122 {
1123 /*
1124 * You can only set the channel explicitly for AP, mesh
1125 * and WDS type interfaces; all others have their channel
1126 * managed via their respective "establish a connection"
1127 * command (connect, join, ...)
1128 *
1129 * Monitors are special as they are normally slaved to
1130 * whatever else is going on, so they behave as though
1131 * you tried setting the wiphy channel itself.
1132 */
1133 return !wdev ||
1134 wdev->iftype == NL80211_IFTYPE_AP ||
1135 wdev->iftype == NL80211_IFTYPE_WDS ||
1136 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1137 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1138 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1139 }
1140
__nl80211_set_channel(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev,struct genl_info * info)1141 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1142 struct wireless_dev *wdev,
1143 struct genl_info *info)
1144 {
1145 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1146 u32 freq;
1147 int result;
1148
1149 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1150 return -EINVAL;
1151
1152 if (!nl80211_can_set_dev_channel(wdev))
1153 return -EOPNOTSUPP;
1154
1155 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1156 channel_type = nla_get_u32(info->attrs[
1157 NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1158 if (channel_type != NL80211_CHAN_NO_HT &&
1159 channel_type != NL80211_CHAN_HT20 &&
1160 channel_type != NL80211_CHAN_HT40PLUS &&
1161 channel_type != NL80211_CHAN_HT40MINUS)
1162 return -EINVAL;
1163 }
1164
1165 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1166
1167 mutex_lock(&rdev->devlist_mtx);
1168 if (wdev) {
1169 wdev_lock(wdev);
1170 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1171 wdev_unlock(wdev);
1172 } else {
1173 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1174 }
1175 mutex_unlock(&rdev->devlist_mtx);
1176
1177 return result;
1178 }
1179
nl80211_set_channel(struct sk_buff * skb,struct genl_info * info)1180 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1181 {
1182 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1183 struct net_device *netdev = info->user_ptr[1];
1184
1185 return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1186 }
1187
nl80211_set_wds_peer(struct sk_buff * skb,struct genl_info * info)1188 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1189 {
1190 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1191 struct net_device *dev = info->user_ptr[1];
1192 struct wireless_dev *wdev = dev->ieee80211_ptr;
1193 const u8 *bssid;
1194
1195 if (!info->attrs[NL80211_ATTR_MAC])
1196 return -EINVAL;
1197
1198 if (netif_running(dev))
1199 return -EBUSY;
1200
1201 if (!rdev->ops->set_wds_peer)
1202 return -EOPNOTSUPP;
1203
1204 if (wdev->iftype != NL80211_IFTYPE_WDS)
1205 return -EOPNOTSUPP;
1206
1207 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1208 return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1209 }
1210
1211
nl80211_set_wiphy(struct sk_buff * skb,struct genl_info * info)1212 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1213 {
1214 struct cfg80211_registered_device *rdev;
1215 struct net_device *netdev = NULL;
1216 struct wireless_dev *wdev;
1217 int result = 0, rem_txq_params = 0;
1218 struct nlattr *nl_txq_params;
1219 u32 changed;
1220 u8 retry_short = 0, retry_long = 0;
1221 u32 frag_threshold = 0, rts_threshold = 0;
1222 u8 coverage_class = 0;
1223
1224 /*
1225 * Try to find the wiphy and netdev. Normally this
1226 * function shouldn't need the netdev, but this is
1227 * done for backward compatibility -- previously
1228 * setting the channel was done per wiphy, but now
1229 * it is per netdev. Previous userland like hostapd
1230 * also passed a netdev to set_wiphy, so that it is
1231 * possible to let that go to the right netdev!
1232 */
1233 mutex_lock(&cfg80211_mutex);
1234
1235 if (info->attrs[NL80211_ATTR_IFINDEX]) {
1236 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1237
1238 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1239 if (netdev && netdev->ieee80211_ptr) {
1240 rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1241 mutex_lock(&rdev->mtx);
1242 } else
1243 netdev = NULL;
1244 }
1245
1246 if (!netdev) {
1247 rdev = __cfg80211_rdev_from_info(info);
1248 if (IS_ERR(rdev)) {
1249 mutex_unlock(&cfg80211_mutex);
1250 return PTR_ERR(rdev);
1251 }
1252 wdev = NULL;
1253 netdev = NULL;
1254 result = 0;
1255
1256 mutex_lock(&rdev->mtx);
1257 } else if (netif_running(netdev) &&
1258 nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1259 wdev = netdev->ieee80211_ptr;
1260 else
1261 wdev = NULL;
1262
1263 /*
1264 * end workaround code, by now the rdev is available
1265 * and locked, and wdev may or may not be NULL.
1266 */
1267
1268 if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1269 result = cfg80211_dev_rename(
1270 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1271
1272 mutex_unlock(&cfg80211_mutex);
1273
1274 if (result)
1275 goto bad_res;
1276
1277 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1278 struct ieee80211_txq_params txq_params;
1279 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1280
1281 if (!rdev->ops->set_txq_params) {
1282 result = -EOPNOTSUPP;
1283 goto bad_res;
1284 }
1285
1286 if (!netdev) {
1287 result = -EINVAL;
1288 goto bad_res;
1289 }
1290
1291 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1292 netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1293 result = -EINVAL;
1294 goto bad_res;
1295 }
1296
1297 if (!netif_running(netdev)) {
1298 result = -ENETDOWN;
1299 goto bad_res;
1300 }
1301
1302 nla_for_each_nested(nl_txq_params,
1303 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1304 rem_txq_params) {
1305 nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1306 nla_data(nl_txq_params),
1307 nla_len(nl_txq_params),
1308 txq_params_policy);
1309 result = parse_txq_params(tb, &txq_params);
1310 if (result)
1311 goto bad_res;
1312
1313 result = rdev->ops->set_txq_params(&rdev->wiphy,
1314 netdev,
1315 &txq_params);
1316 if (result)
1317 goto bad_res;
1318 }
1319 }
1320
1321 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1322 result = __nl80211_set_channel(rdev, wdev, info);
1323 if (result)
1324 goto bad_res;
1325 }
1326
1327 if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1328 enum nl80211_tx_power_setting type;
1329 int idx, mbm = 0;
1330
1331 if (!rdev->ops->set_tx_power) {
1332 result = -EOPNOTSUPP;
1333 goto bad_res;
1334 }
1335
1336 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1337 type = nla_get_u32(info->attrs[idx]);
1338
1339 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1340 (type != NL80211_TX_POWER_AUTOMATIC)) {
1341 result = -EINVAL;
1342 goto bad_res;
1343 }
1344
1345 if (type != NL80211_TX_POWER_AUTOMATIC) {
1346 idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1347 mbm = nla_get_u32(info->attrs[idx]);
1348 }
1349
1350 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1351 if (result)
1352 goto bad_res;
1353 }
1354
1355 if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1356 info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1357 u32 tx_ant, rx_ant;
1358 if ((!rdev->wiphy.available_antennas_tx &&
1359 !rdev->wiphy.available_antennas_rx) ||
1360 !rdev->ops->set_antenna) {
1361 result = -EOPNOTSUPP;
1362 goto bad_res;
1363 }
1364
1365 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1366 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1367
1368 /* reject antenna configurations which don't match the
1369 * available antenna masks, except for the "all" mask */
1370 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1371 (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1372 result = -EINVAL;
1373 goto bad_res;
1374 }
1375
1376 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1377 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1378
1379 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1380 if (result)
1381 goto bad_res;
1382 }
1383
1384 changed = 0;
1385
1386 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1387 retry_short = nla_get_u8(
1388 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1389 if (retry_short == 0) {
1390 result = -EINVAL;
1391 goto bad_res;
1392 }
1393 changed |= WIPHY_PARAM_RETRY_SHORT;
1394 }
1395
1396 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1397 retry_long = nla_get_u8(
1398 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1399 if (retry_long == 0) {
1400 result = -EINVAL;
1401 goto bad_res;
1402 }
1403 changed |= WIPHY_PARAM_RETRY_LONG;
1404 }
1405
1406 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1407 frag_threshold = nla_get_u32(
1408 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1409 if (frag_threshold < 256) {
1410 result = -EINVAL;
1411 goto bad_res;
1412 }
1413 if (frag_threshold != (u32) -1) {
1414 /*
1415 * Fragments (apart from the last one) are required to
1416 * have even length. Make the fragmentation code
1417 * simpler by stripping LSB should someone try to use
1418 * odd threshold value.
1419 */
1420 frag_threshold &= ~0x1;
1421 }
1422 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1423 }
1424
1425 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1426 rts_threshold = nla_get_u32(
1427 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1428 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1429 }
1430
1431 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1432 coverage_class = nla_get_u8(
1433 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1434 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1435 }
1436
1437 if (changed) {
1438 u8 old_retry_short, old_retry_long;
1439 u32 old_frag_threshold, old_rts_threshold;
1440 u8 old_coverage_class;
1441
1442 if (!rdev->ops->set_wiphy_params) {
1443 result = -EOPNOTSUPP;
1444 goto bad_res;
1445 }
1446
1447 old_retry_short = rdev->wiphy.retry_short;
1448 old_retry_long = rdev->wiphy.retry_long;
1449 old_frag_threshold = rdev->wiphy.frag_threshold;
1450 old_rts_threshold = rdev->wiphy.rts_threshold;
1451 old_coverage_class = rdev->wiphy.coverage_class;
1452
1453 if (changed & WIPHY_PARAM_RETRY_SHORT)
1454 rdev->wiphy.retry_short = retry_short;
1455 if (changed & WIPHY_PARAM_RETRY_LONG)
1456 rdev->wiphy.retry_long = retry_long;
1457 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1458 rdev->wiphy.frag_threshold = frag_threshold;
1459 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1460 rdev->wiphy.rts_threshold = rts_threshold;
1461 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1462 rdev->wiphy.coverage_class = coverage_class;
1463
1464 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1465 if (result) {
1466 rdev->wiphy.retry_short = old_retry_short;
1467 rdev->wiphy.retry_long = old_retry_long;
1468 rdev->wiphy.frag_threshold = old_frag_threshold;
1469 rdev->wiphy.rts_threshold = old_rts_threshold;
1470 rdev->wiphy.coverage_class = old_coverage_class;
1471 }
1472 }
1473
1474 bad_res:
1475 mutex_unlock(&rdev->mtx);
1476 if (netdev)
1477 dev_put(netdev);
1478 return result;
1479 }
1480
1481
nl80211_send_iface(struct sk_buff * msg,u32 pid,u32 seq,int flags,struct cfg80211_registered_device * rdev,struct net_device * dev)1482 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1483 struct cfg80211_registered_device *rdev,
1484 struct net_device *dev)
1485 {
1486 void *hdr;
1487
1488 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1489 if (!hdr)
1490 return -1;
1491
1492 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1493 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1494 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1495 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1496
1497 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1498 rdev->devlist_generation ^
1499 (cfg80211_rdev_list_generation << 2));
1500
1501 return genlmsg_end(msg, hdr);
1502
1503 nla_put_failure:
1504 genlmsg_cancel(msg, hdr);
1505 return -EMSGSIZE;
1506 }
1507
nl80211_dump_interface(struct sk_buff * skb,struct netlink_callback * cb)1508 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1509 {
1510 int wp_idx = 0;
1511 int if_idx = 0;
1512 int wp_start = cb->args[0];
1513 int if_start = cb->args[1];
1514 struct cfg80211_registered_device *rdev;
1515 struct wireless_dev *wdev;
1516
1517 mutex_lock(&cfg80211_mutex);
1518 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1519 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1520 continue;
1521 if (wp_idx < wp_start) {
1522 wp_idx++;
1523 continue;
1524 }
1525 if_idx = 0;
1526
1527 mutex_lock(&rdev->devlist_mtx);
1528 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1529 if (if_idx < if_start) {
1530 if_idx++;
1531 continue;
1532 }
1533 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1534 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1535 rdev, wdev->netdev) < 0) {
1536 mutex_unlock(&rdev->devlist_mtx);
1537 goto out;
1538 }
1539 if_idx++;
1540 }
1541 mutex_unlock(&rdev->devlist_mtx);
1542
1543 wp_idx++;
1544 }
1545 out:
1546 mutex_unlock(&cfg80211_mutex);
1547
1548 cb->args[0] = wp_idx;
1549 cb->args[1] = if_idx;
1550
1551 return skb->len;
1552 }
1553
nl80211_get_interface(struct sk_buff * skb,struct genl_info * info)1554 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1555 {
1556 struct sk_buff *msg;
1557 struct cfg80211_registered_device *dev = info->user_ptr[0];
1558 struct net_device *netdev = info->user_ptr[1];
1559
1560 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1561 if (!msg)
1562 return -ENOMEM;
1563
1564 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1565 dev, netdev) < 0) {
1566 nlmsg_free(msg);
1567 return -ENOBUFS;
1568 }
1569
1570 return genlmsg_reply(msg, info);
1571 }
1572
1573 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1574 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1575 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1576 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1577 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1578 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1579 };
1580
parse_monitor_flags(struct nlattr * nla,u32 * mntrflags)1581 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1582 {
1583 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1584 int flag;
1585
1586 *mntrflags = 0;
1587
1588 if (!nla)
1589 return -EINVAL;
1590
1591 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1592 nla, mntr_flags_policy))
1593 return -EINVAL;
1594
1595 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1596 if (flags[flag])
1597 *mntrflags |= (1<<flag);
1598
1599 return 0;
1600 }
1601
nl80211_valid_4addr(struct cfg80211_registered_device * rdev,struct net_device * netdev,u8 use_4addr,enum nl80211_iftype iftype)1602 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1603 struct net_device *netdev, u8 use_4addr,
1604 enum nl80211_iftype iftype)
1605 {
1606 if (!use_4addr) {
1607 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1608 return -EBUSY;
1609 return 0;
1610 }
1611
1612 switch (iftype) {
1613 case NL80211_IFTYPE_AP_VLAN:
1614 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1615 return 0;
1616 break;
1617 case NL80211_IFTYPE_STATION:
1618 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1619 return 0;
1620 break;
1621 default:
1622 break;
1623 }
1624
1625 return -EOPNOTSUPP;
1626 }
1627
nl80211_set_interface(struct sk_buff * skb,struct genl_info * info)1628 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1629 {
1630 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1631 struct vif_params params;
1632 int err;
1633 enum nl80211_iftype otype, ntype;
1634 struct net_device *dev = info->user_ptr[1];
1635 u32 _flags, *flags = NULL;
1636 bool change = false;
1637
1638 memset(¶ms, 0, sizeof(params));
1639
1640 otype = ntype = dev->ieee80211_ptr->iftype;
1641
1642 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1643 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1644 if (otype != ntype)
1645 change = true;
1646 if (ntype > NL80211_IFTYPE_MAX)
1647 return -EINVAL;
1648 }
1649
1650 if (info->attrs[NL80211_ATTR_MESH_ID]) {
1651 struct wireless_dev *wdev = dev->ieee80211_ptr;
1652
1653 if (ntype != NL80211_IFTYPE_MESH_POINT)
1654 return -EINVAL;
1655 if (netif_running(dev))
1656 return -EBUSY;
1657
1658 wdev_lock(wdev);
1659 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1660 IEEE80211_MAX_MESH_ID_LEN);
1661 wdev->mesh_id_up_len =
1662 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1663 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1664 wdev->mesh_id_up_len);
1665 wdev_unlock(wdev);
1666 }
1667
1668 if (info->attrs[NL80211_ATTR_4ADDR]) {
1669 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1670 change = true;
1671 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1672 if (err)
1673 return err;
1674 } else {
1675 params.use_4addr = -1;
1676 }
1677
1678 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1679 if (ntype != NL80211_IFTYPE_MONITOR)
1680 return -EINVAL;
1681 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1682 &_flags);
1683 if (err)
1684 return err;
1685
1686 flags = &_flags;
1687 change = true;
1688 }
1689
1690 if (change)
1691 err = cfg80211_change_iface(rdev, dev, ntype, flags, ¶ms);
1692 else
1693 err = 0;
1694
1695 if (!err && params.use_4addr != -1)
1696 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1697
1698 return err;
1699 }
1700
nl80211_new_interface(struct sk_buff * skb,struct genl_info * info)1701 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1702 {
1703 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1704 struct vif_params params;
1705 struct net_device *dev;
1706 int err;
1707 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1708 u32 flags;
1709
1710 memset(¶ms, 0, sizeof(params));
1711
1712 if (!info->attrs[NL80211_ATTR_IFNAME])
1713 return -EINVAL;
1714
1715 if (info->attrs[NL80211_ATTR_IFTYPE]) {
1716 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1717 if (type > NL80211_IFTYPE_MAX)
1718 return -EINVAL;
1719 }
1720
1721 if (!rdev->ops->add_virtual_intf ||
1722 !(rdev->wiphy.interface_modes & (1 << type)))
1723 return -EOPNOTSUPP;
1724
1725 if (info->attrs[NL80211_ATTR_4ADDR]) {
1726 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1727 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1728 if (err)
1729 return err;
1730 }
1731
1732 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1733 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1734 &flags);
1735 dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1736 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1737 type, err ? NULL : &flags, ¶ms);
1738 if (IS_ERR(dev))
1739 return PTR_ERR(dev);
1740
1741 if (type == NL80211_IFTYPE_MESH_POINT &&
1742 info->attrs[NL80211_ATTR_MESH_ID]) {
1743 struct wireless_dev *wdev = dev->ieee80211_ptr;
1744
1745 wdev_lock(wdev);
1746 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1747 IEEE80211_MAX_MESH_ID_LEN);
1748 wdev->mesh_id_up_len =
1749 nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1750 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1751 wdev->mesh_id_up_len);
1752 wdev_unlock(wdev);
1753 }
1754
1755 return 0;
1756 }
1757
nl80211_del_interface(struct sk_buff * skb,struct genl_info * info)1758 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1759 {
1760 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1761 struct net_device *dev = info->user_ptr[1];
1762
1763 if (!rdev->ops->del_virtual_intf)
1764 return -EOPNOTSUPP;
1765
1766 return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1767 }
1768
nl80211_set_noack_map(struct sk_buff * skb,struct genl_info * info)1769 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1770 {
1771 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1772 struct net_device *dev = info->user_ptr[1];
1773 u16 noack_map;
1774
1775 if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1776 return -EINVAL;
1777
1778 if (!rdev->ops->set_noack_map)
1779 return -EOPNOTSUPP;
1780
1781 noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1782
1783 return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1784 }
1785
1786 struct get_key_cookie {
1787 struct sk_buff *msg;
1788 int error;
1789 int idx;
1790 };
1791
get_key_callback(void * c,struct key_params * params)1792 static void get_key_callback(void *c, struct key_params *params)
1793 {
1794 struct nlattr *key;
1795 struct get_key_cookie *cookie = c;
1796
1797 if (params->key)
1798 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1799 params->key_len, params->key);
1800
1801 if (params->seq)
1802 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1803 params->seq_len, params->seq);
1804
1805 if (params->cipher)
1806 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1807 params->cipher);
1808
1809 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1810 if (!key)
1811 goto nla_put_failure;
1812
1813 if (params->key)
1814 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1815 params->key_len, params->key);
1816
1817 if (params->seq)
1818 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1819 params->seq_len, params->seq);
1820
1821 if (params->cipher)
1822 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1823 params->cipher);
1824
1825 NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1826
1827 nla_nest_end(cookie->msg, key);
1828
1829 return;
1830 nla_put_failure:
1831 cookie->error = 1;
1832 }
1833
nl80211_get_key(struct sk_buff * skb,struct genl_info * info)1834 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1835 {
1836 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1837 int err;
1838 struct net_device *dev = info->user_ptr[1];
1839 u8 key_idx = 0;
1840 const u8 *mac_addr = NULL;
1841 bool pairwise;
1842 struct get_key_cookie cookie = {
1843 .error = 0,
1844 };
1845 void *hdr;
1846 struct sk_buff *msg;
1847
1848 if (info->attrs[NL80211_ATTR_KEY_IDX])
1849 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1850
1851 if (key_idx > 5)
1852 return -EINVAL;
1853
1854 if (info->attrs[NL80211_ATTR_MAC])
1855 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1856
1857 pairwise = !!mac_addr;
1858 if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1859 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1860 if (kt >= NUM_NL80211_KEYTYPES)
1861 return -EINVAL;
1862 if (kt != NL80211_KEYTYPE_GROUP &&
1863 kt != NL80211_KEYTYPE_PAIRWISE)
1864 return -EINVAL;
1865 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1866 }
1867
1868 if (!rdev->ops->get_key)
1869 return -EOPNOTSUPP;
1870
1871 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1872 if (!msg)
1873 return -ENOMEM;
1874
1875 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1876 NL80211_CMD_NEW_KEY);
1877 if (IS_ERR(hdr))
1878 return PTR_ERR(hdr);
1879
1880 cookie.msg = msg;
1881 cookie.idx = key_idx;
1882
1883 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1884 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1885 if (mac_addr)
1886 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1887
1888 if (pairwise && mac_addr &&
1889 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1890 return -ENOENT;
1891
1892 err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1893 mac_addr, &cookie, get_key_callback);
1894
1895 if (err)
1896 goto free_msg;
1897
1898 if (cookie.error)
1899 goto nla_put_failure;
1900
1901 genlmsg_end(msg, hdr);
1902 return genlmsg_reply(msg, info);
1903
1904 nla_put_failure:
1905 err = -ENOBUFS;
1906 free_msg:
1907 nlmsg_free(msg);
1908 return err;
1909 }
1910
nl80211_set_key(struct sk_buff * skb,struct genl_info * info)1911 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1912 {
1913 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1914 struct key_parse key;
1915 int err;
1916 struct net_device *dev = info->user_ptr[1];
1917
1918 err = nl80211_parse_key(info, &key);
1919 if (err)
1920 return err;
1921
1922 if (key.idx < 0)
1923 return -EINVAL;
1924
1925 /* only support setting default key */
1926 if (!key.def && !key.defmgmt)
1927 return -EINVAL;
1928
1929 wdev_lock(dev->ieee80211_ptr);
1930
1931 if (key.def) {
1932 if (!rdev->ops->set_default_key) {
1933 err = -EOPNOTSUPP;
1934 goto out;
1935 }
1936
1937 err = nl80211_key_allowed(dev->ieee80211_ptr);
1938 if (err)
1939 goto out;
1940
1941 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1942 key.def_uni, key.def_multi);
1943
1944 if (err)
1945 goto out;
1946
1947 #ifdef CONFIG_CFG80211_WEXT
1948 dev->ieee80211_ptr->wext.default_key = key.idx;
1949 #endif
1950 } else {
1951 if (key.def_uni || !key.def_multi) {
1952 err = -EINVAL;
1953 goto out;
1954 }
1955
1956 if (!rdev->ops->set_default_mgmt_key) {
1957 err = -EOPNOTSUPP;
1958 goto out;
1959 }
1960
1961 err = nl80211_key_allowed(dev->ieee80211_ptr);
1962 if (err)
1963 goto out;
1964
1965 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1966 dev, key.idx);
1967 if (err)
1968 goto out;
1969
1970 #ifdef CONFIG_CFG80211_WEXT
1971 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1972 #endif
1973 }
1974
1975 out:
1976 wdev_unlock(dev->ieee80211_ptr);
1977
1978 return err;
1979 }
1980
nl80211_new_key(struct sk_buff * skb,struct genl_info * info)1981 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1982 {
1983 struct cfg80211_registered_device *rdev = info->user_ptr[0];
1984 int err;
1985 struct net_device *dev = info->user_ptr[1];
1986 struct key_parse key;
1987 const u8 *mac_addr = NULL;
1988
1989 err = nl80211_parse_key(info, &key);
1990 if (err)
1991 return err;
1992
1993 if (!key.p.key)
1994 return -EINVAL;
1995
1996 if (info->attrs[NL80211_ATTR_MAC])
1997 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1998
1999 if (key.type == -1) {
2000 if (mac_addr)
2001 key.type = NL80211_KEYTYPE_PAIRWISE;
2002 else
2003 key.type = NL80211_KEYTYPE_GROUP;
2004 }
2005
2006 /* for now */
2007 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2008 key.type != NL80211_KEYTYPE_GROUP)
2009 return -EINVAL;
2010
2011 if (!rdev->ops->add_key)
2012 return -EOPNOTSUPP;
2013
2014 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2015 key.type == NL80211_KEYTYPE_PAIRWISE,
2016 mac_addr))
2017 return -EINVAL;
2018
2019 wdev_lock(dev->ieee80211_ptr);
2020 err = nl80211_key_allowed(dev->ieee80211_ptr);
2021 if (!err)
2022 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2023 key.type == NL80211_KEYTYPE_PAIRWISE,
2024 mac_addr, &key.p);
2025 wdev_unlock(dev->ieee80211_ptr);
2026
2027 return err;
2028 }
2029
nl80211_del_key(struct sk_buff * skb,struct genl_info * info)2030 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2031 {
2032 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2033 int err;
2034 struct net_device *dev = info->user_ptr[1];
2035 u8 *mac_addr = NULL;
2036 struct key_parse key;
2037
2038 err = nl80211_parse_key(info, &key);
2039 if (err)
2040 return err;
2041
2042 if (info->attrs[NL80211_ATTR_MAC])
2043 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2044
2045 if (key.type == -1) {
2046 if (mac_addr)
2047 key.type = NL80211_KEYTYPE_PAIRWISE;
2048 else
2049 key.type = NL80211_KEYTYPE_GROUP;
2050 }
2051
2052 /* for now */
2053 if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2054 key.type != NL80211_KEYTYPE_GROUP)
2055 return -EINVAL;
2056
2057 if (!rdev->ops->del_key)
2058 return -EOPNOTSUPP;
2059
2060 wdev_lock(dev->ieee80211_ptr);
2061 err = nl80211_key_allowed(dev->ieee80211_ptr);
2062
2063 if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2064 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2065 err = -ENOENT;
2066
2067 if (!err)
2068 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2069 key.type == NL80211_KEYTYPE_PAIRWISE,
2070 mac_addr);
2071
2072 #ifdef CONFIG_CFG80211_WEXT
2073 if (!err) {
2074 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2075 dev->ieee80211_ptr->wext.default_key = -1;
2076 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2077 dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2078 }
2079 #endif
2080 wdev_unlock(dev->ieee80211_ptr);
2081
2082 return err;
2083 }
2084
nl80211_parse_beacon(struct genl_info * info,struct cfg80211_beacon_data * bcn)2085 static int nl80211_parse_beacon(struct genl_info *info,
2086 struct cfg80211_beacon_data *bcn)
2087 {
2088 bool haveinfo = false;
2089
2090 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2091 !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2092 !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2093 !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2094 return -EINVAL;
2095
2096 memset(bcn, 0, sizeof(*bcn));
2097
2098 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2099 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2100 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2101 if (!bcn->head_len)
2102 return -EINVAL;
2103 haveinfo = true;
2104 }
2105
2106 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2107 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2108 bcn->tail_len =
2109 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2110 haveinfo = true;
2111 }
2112
2113 if (!haveinfo)
2114 return -EINVAL;
2115
2116 if (info->attrs[NL80211_ATTR_IE]) {
2117 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2118 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2119 }
2120
2121 if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2122 bcn->proberesp_ies =
2123 nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2124 bcn->proberesp_ies_len =
2125 nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2126 }
2127
2128 if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2129 bcn->assocresp_ies =
2130 nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2131 bcn->assocresp_ies_len =
2132 nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2133 }
2134
2135 if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2136 bcn->probe_resp =
2137 nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2138 bcn->probe_resp_len =
2139 nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2140 }
2141
2142 return 0;
2143 }
2144
nl80211_start_ap(struct sk_buff * skb,struct genl_info * info)2145 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2146 {
2147 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2148 struct net_device *dev = info->user_ptr[1];
2149 struct wireless_dev *wdev = dev->ieee80211_ptr;
2150 struct cfg80211_ap_settings params;
2151 int err;
2152
2153 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2154 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2155 return -EOPNOTSUPP;
2156
2157 if (!rdev->ops->start_ap)
2158 return -EOPNOTSUPP;
2159
2160 if (wdev->beacon_interval)
2161 return -EALREADY;
2162
2163 memset(¶ms, 0, sizeof(params));
2164
2165 /* these are required for START_AP */
2166 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2167 !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2168 !info->attrs[NL80211_ATTR_BEACON_HEAD])
2169 return -EINVAL;
2170
2171 err = nl80211_parse_beacon(info, ¶ms.beacon);
2172 if (err)
2173 return err;
2174
2175 params.beacon_interval =
2176 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2177 params.dtim_period =
2178 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2179
2180 err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2181 if (err)
2182 return err;
2183
2184 /*
2185 * In theory, some of these attributes should be required here
2186 * but since they were not used when the command was originally
2187 * added, keep them optional for old user space programs to let
2188 * them continue to work with drivers that do not need the
2189 * additional information -- drivers must check!
2190 */
2191 if (info->attrs[NL80211_ATTR_SSID]) {
2192 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2193 params.ssid_len =
2194 nla_len(info->attrs[NL80211_ATTR_SSID]);
2195 if (params.ssid_len == 0 ||
2196 params.ssid_len > IEEE80211_MAX_SSID_LEN)
2197 return -EINVAL;
2198 }
2199
2200 if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2201 params.hidden_ssid = nla_get_u32(
2202 info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2203 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2204 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2205 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2206 return -EINVAL;
2207 }
2208
2209 params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2210
2211 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2212 params.auth_type = nla_get_u32(
2213 info->attrs[NL80211_ATTR_AUTH_TYPE]);
2214 if (!nl80211_valid_auth_type(params.auth_type))
2215 return -EINVAL;
2216 } else
2217 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2218
2219 err = nl80211_crypto_settings(rdev, info, ¶ms.crypto,
2220 NL80211_MAX_NR_CIPHER_SUITES);
2221 if (err)
2222 return err;
2223
2224 if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2225 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2226 return -EOPNOTSUPP;
2227 params.inactivity_timeout = nla_get_u16(
2228 info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2229 }
2230
2231 err = rdev->ops->start_ap(&rdev->wiphy, dev, ¶ms);
2232 if (!err)
2233 wdev->beacon_interval = params.beacon_interval;
2234 return err;
2235 }
2236
nl80211_set_beacon(struct sk_buff * skb,struct genl_info * info)2237 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2238 {
2239 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2240 struct net_device *dev = info->user_ptr[1];
2241 struct wireless_dev *wdev = dev->ieee80211_ptr;
2242 struct cfg80211_beacon_data params;
2243 int err;
2244
2245 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2246 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2247 return -EOPNOTSUPP;
2248
2249 if (!rdev->ops->change_beacon)
2250 return -EOPNOTSUPP;
2251
2252 if (!wdev->beacon_interval)
2253 return -EINVAL;
2254
2255 err = nl80211_parse_beacon(info, ¶ms);
2256 if (err)
2257 return err;
2258
2259 return rdev->ops->change_beacon(&rdev->wiphy, dev, ¶ms);
2260 }
2261
nl80211_stop_ap(struct sk_buff * skb,struct genl_info * info)2262 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2263 {
2264 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2265 struct net_device *dev = info->user_ptr[1];
2266 struct wireless_dev *wdev = dev->ieee80211_ptr;
2267 int err;
2268
2269 if (!rdev->ops->stop_ap)
2270 return -EOPNOTSUPP;
2271
2272 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2273 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2274 return -EOPNOTSUPP;
2275
2276 if (!wdev->beacon_interval)
2277 return -ENOENT;
2278
2279 err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2280 if (!err)
2281 wdev->beacon_interval = 0;
2282 return err;
2283 }
2284
2285 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2286 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2287 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2288 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2289 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2290 [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2291 [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2292 };
2293
parse_station_flags(struct genl_info * info,enum nl80211_iftype iftype,struct station_parameters * params)2294 static int parse_station_flags(struct genl_info *info,
2295 enum nl80211_iftype iftype,
2296 struct station_parameters *params)
2297 {
2298 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2299 struct nlattr *nla;
2300 int flag;
2301
2302 /*
2303 * Try parsing the new attribute first so userspace
2304 * can specify both for older kernels.
2305 */
2306 nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2307 if (nla) {
2308 struct nl80211_sta_flag_update *sta_flags;
2309
2310 sta_flags = nla_data(nla);
2311 params->sta_flags_mask = sta_flags->mask;
2312 params->sta_flags_set = sta_flags->set;
2313 if ((params->sta_flags_mask |
2314 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2315 return -EINVAL;
2316 return 0;
2317 }
2318
2319 /* if present, parse the old attribute */
2320
2321 nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2322 if (!nla)
2323 return 0;
2324
2325 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2326 nla, sta_flags_policy))
2327 return -EINVAL;
2328
2329 /*
2330 * Only allow certain flags for interface types so that
2331 * other attributes are silently ignored. Remember that
2332 * this is backward compatibility code with old userspace
2333 * and shouldn't be hit in other cases anyway.
2334 */
2335 switch (iftype) {
2336 case NL80211_IFTYPE_AP:
2337 case NL80211_IFTYPE_AP_VLAN:
2338 case NL80211_IFTYPE_P2P_GO:
2339 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2340 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2341 BIT(NL80211_STA_FLAG_WME) |
2342 BIT(NL80211_STA_FLAG_MFP);
2343 break;
2344 case NL80211_IFTYPE_P2P_CLIENT:
2345 case NL80211_IFTYPE_STATION:
2346 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2347 BIT(NL80211_STA_FLAG_TDLS_PEER);
2348 break;
2349 case NL80211_IFTYPE_MESH_POINT:
2350 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2351 BIT(NL80211_STA_FLAG_MFP) |
2352 BIT(NL80211_STA_FLAG_AUTHORIZED);
2353 default:
2354 return -EINVAL;
2355 }
2356
2357 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2358 if (flags[flag])
2359 params->sta_flags_set |= (1<<flag);
2360
2361 return 0;
2362 }
2363
nl80211_put_sta_rate(struct sk_buff * msg,struct rate_info * info,int attr)2364 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2365 int attr)
2366 {
2367 struct nlattr *rate;
2368 u16 bitrate;
2369
2370 rate = nla_nest_start(msg, attr);
2371 if (!rate)
2372 goto nla_put_failure;
2373
2374 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2375 bitrate = cfg80211_calculate_bitrate(info);
2376 if (bitrate > 0)
2377 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2378
2379 if (info->flags & RATE_INFO_FLAGS_MCS)
2380 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2381 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2382 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2383 if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2384 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2385
2386 nla_nest_end(msg, rate);
2387 return true;
2388
2389 nla_put_failure:
2390 return false;
2391 }
2392
nl80211_send_station(struct sk_buff * msg,u32 pid,u32 seq,int flags,struct cfg80211_registered_device * rdev,struct net_device * dev,const u8 * mac_addr,struct station_info * sinfo)2393 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2394 int flags,
2395 struct cfg80211_registered_device *rdev,
2396 struct net_device *dev,
2397 const u8 *mac_addr, struct station_info *sinfo)
2398 {
2399 void *hdr;
2400 struct nlattr *sinfoattr, *bss_param;
2401
2402 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2403 if (!hdr)
2404 return -1;
2405
2406 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2407 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2408
2409 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2410
2411 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2412 if (!sinfoattr)
2413 goto nla_put_failure;
2414 if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2415 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2416 sinfo->connected_time);
2417 if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2418 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2419 sinfo->inactive_time);
2420 if (sinfo->filled & STATION_INFO_RX_BYTES)
2421 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2422 sinfo->rx_bytes);
2423 if (sinfo->filled & STATION_INFO_TX_BYTES)
2424 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2425 sinfo->tx_bytes);
2426 if (sinfo->filled & STATION_INFO_LLID)
2427 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2428 sinfo->llid);
2429 if (sinfo->filled & STATION_INFO_PLID)
2430 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2431 sinfo->plid);
2432 if (sinfo->filled & STATION_INFO_PLINK_STATE)
2433 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2434 sinfo->plink_state);
2435 switch (rdev->wiphy.signal_type) {
2436 case CFG80211_SIGNAL_TYPE_MBM:
2437 if (sinfo->filled & STATION_INFO_SIGNAL)
2438 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2439 sinfo->signal);
2440 if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2441 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2442 sinfo->signal_avg);
2443 break;
2444 default:
2445 break;
2446 }
2447 if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2448 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2449 NL80211_STA_INFO_TX_BITRATE))
2450 goto nla_put_failure;
2451 }
2452 if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2453 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2454 NL80211_STA_INFO_RX_BITRATE))
2455 goto nla_put_failure;
2456 }
2457 if (sinfo->filled & STATION_INFO_RX_PACKETS)
2458 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2459 sinfo->rx_packets);
2460 if (sinfo->filled & STATION_INFO_TX_PACKETS)
2461 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2462 sinfo->tx_packets);
2463 if (sinfo->filled & STATION_INFO_TX_RETRIES)
2464 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2465 sinfo->tx_retries);
2466 if (sinfo->filled & STATION_INFO_TX_FAILED)
2467 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2468 sinfo->tx_failed);
2469 if (sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT)
2470 NLA_PUT_U32(msg, NL80211_STA_INFO_BEACON_LOSS,
2471 sinfo->beacon_loss_count);
2472 if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2473 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2474 if (!bss_param)
2475 goto nla_put_failure;
2476
2477 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2478 NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2479 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2480 NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2481 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2482 NLA_PUT_FLAG(msg,
2483 NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2484 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2485 sinfo->bss_param.dtim_period);
2486 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2487 sinfo->bss_param.beacon_interval);
2488
2489 nla_nest_end(msg, bss_param);
2490 }
2491 if (sinfo->filled & STATION_INFO_STA_FLAGS)
2492 NLA_PUT(msg, NL80211_STA_INFO_STA_FLAGS,
2493 sizeof(struct nl80211_sta_flag_update),
2494 &sinfo->sta_flags);
2495 nla_nest_end(msg, sinfoattr);
2496
2497 if (sinfo->filled & STATION_INFO_ASSOC_REQ_IES)
2498 NLA_PUT(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2499 sinfo->assoc_req_ies);
2500
2501 return genlmsg_end(msg, hdr);
2502
2503 nla_put_failure:
2504 genlmsg_cancel(msg, hdr);
2505 return -EMSGSIZE;
2506 }
2507
nl80211_dump_station(struct sk_buff * skb,struct netlink_callback * cb)2508 static int nl80211_dump_station(struct sk_buff *skb,
2509 struct netlink_callback *cb)
2510 {
2511 struct station_info sinfo;
2512 struct cfg80211_registered_device *dev;
2513 struct net_device *netdev;
2514 u8 mac_addr[ETH_ALEN];
2515 int sta_idx = cb->args[1];
2516 int err;
2517
2518 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2519 if (err)
2520 return err;
2521
2522 if (!dev->ops->dump_station) {
2523 err = -EOPNOTSUPP;
2524 goto out_err;
2525 }
2526
2527 while (1) {
2528 memset(&sinfo, 0, sizeof(sinfo));
2529 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2530 mac_addr, &sinfo);
2531 if (err == -ENOENT)
2532 break;
2533 if (err)
2534 goto out_err;
2535
2536 if (nl80211_send_station(skb,
2537 NETLINK_CB(cb->skb).pid,
2538 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2539 dev, netdev, mac_addr,
2540 &sinfo) < 0)
2541 goto out;
2542
2543 sta_idx++;
2544 }
2545
2546
2547 out:
2548 cb->args[1] = sta_idx;
2549 err = skb->len;
2550 out_err:
2551 nl80211_finish_netdev_dump(dev);
2552
2553 return err;
2554 }
2555
nl80211_get_station(struct sk_buff * skb,struct genl_info * info)2556 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2557 {
2558 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2559 struct net_device *dev = info->user_ptr[1];
2560 struct station_info sinfo;
2561 struct sk_buff *msg;
2562 u8 *mac_addr = NULL;
2563 int err;
2564
2565 memset(&sinfo, 0, sizeof(sinfo));
2566
2567 if (!info->attrs[NL80211_ATTR_MAC])
2568 return -EINVAL;
2569
2570 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2571
2572 if (!rdev->ops->get_station)
2573 return -EOPNOTSUPP;
2574
2575 err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2576 if (err)
2577 return err;
2578
2579 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2580 if (!msg)
2581 return -ENOMEM;
2582
2583 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2584 rdev, dev, mac_addr, &sinfo) < 0) {
2585 nlmsg_free(msg);
2586 return -ENOBUFS;
2587 }
2588
2589 return genlmsg_reply(msg, info);
2590 }
2591
2592 /*
2593 * Get vlan interface making sure it is running and on the right wiphy.
2594 */
get_vlan(struct genl_info * info,struct cfg80211_registered_device * rdev)2595 static struct net_device *get_vlan(struct genl_info *info,
2596 struct cfg80211_registered_device *rdev)
2597 {
2598 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2599 struct net_device *v;
2600 int ret;
2601
2602 if (!vlanattr)
2603 return NULL;
2604
2605 v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2606 if (!v)
2607 return ERR_PTR(-ENODEV);
2608
2609 if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2610 ret = -EINVAL;
2611 goto error;
2612 }
2613
2614 if (!netif_running(v)) {
2615 ret = -ENETDOWN;
2616 goto error;
2617 }
2618
2619 return v;
2620 error:
2621 dev_put(v);
2622 return ERR_PTR(ret);
2623 }
2624
nl80211_set_station(struct sk_buff * skb,struct genl_info * info)2625 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2626 {
2627 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2628 int err;
2629 struct net_device *dev = info->user_ptr[1];
2630 struct station_parameters params;
2631 u8 *mac_addr = NULL;
2632
2633 memset(¶ms, 0, sizeof(params));
2634
2635 params.listen_interval = -1;
2636 params.plink_state = -1;
2637
2638 if (info->attrs[NL80211_ATTR_STA_AID])
2639 return -EINVAL;
2640
2641 if (!info->attrs[NL80211_ATTR_MAC])
2642 return -EINVAL;
2643
2644 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2645
2646 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2647 params.supported_rates =
2648 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2649 params.supported_rates_len =
2650 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2651 }
2652
2653 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2654 params.listen_interval =
2655 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2656
2657 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2658 params.ht_capa =
2659 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2660
2661 if (!rdev->ops->change_station)
2662 return -EOPNOTSUPP;
2663
2664 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, ¶ms))
2665 return -EINVAL;
2666
2667 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2668 params.plink_action =
2669 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2670
2671 if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2672 params.plink_state =
2673 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2674
2675 switch (dev->ieee80211_ptr->iftype) {
2676 case NL80211_IFTYPE_AP:
2677 case NL80211_IFTYPE_AP_VLAN:
2678 case NL80211_IFTYPE_P2P_GO:
2679 /* disallow mesh-specific things */
2680 if (params.plink_action)
2681 return -EINVAL;
2682
2683 /* TDLS can't be set, ... */
2684 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2685 return -EINVAL;
2686 /*
2687 * ... but don't bother the driver with it. This works around
2688 * a hostapd/wpa_supplicant issue -- it always includes the
2689 * TLDS_PEER flag in the mask even for AP mode.
2690 */
2691 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2692
2693 /* accept only the listed bits */
2694 if (params.sta_flags_mask &
2695 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2696 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2697 BIT(NL80211_STA_FLAG_WME) |
2698 BIT(NL80211_STA_FLAG_MFP)))
2699 return -EINVAL;
2700
2701 /* must be last in here for error handling */
2702 params.vlan = get_vlan(info, rdev);
2703 if (IS_ERR(params.vlan))
2704 return PTR_ERR(params.vlan);
2705 break;
2706 case NL80211_IFTYPE_P2P_CLIENT:
2707 case NL80211_IFTYPE_STATION:
2708 /*
2709 * Don't allow userspace to change the TDLS_PEER flag,
2710 * but silently ignore attempts to change it since we
2711 * don't have state here to verify that it doesn't try
2712 * to change the flag.
2713 */
2714 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2715 /* fall through */
2716 case NL80211_IFTYPE_ADHOC:
2717 /* disallow things sta doesn't support */
2718 if (params.plink_action)
2719 return -EINVAL;
2720 if (params.ht_capa)
2721 return -EINVAL;
2722 if (params.listen_interval >= 0)
2723 return -EINVAL;
2724 /* reject any changes other than AUTHORIZED */
2725 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2726 return -EINVAL;
2727 break;
2728 case NL80211_IFTYPE_MESH_POINT:
2729 /* disallow things mesh doesn't support */
2730 if (params.vlan)
2731 return -EINVAL;
2732 if (params.ht_capa)
2733 return -EINVAL;
2734 if (params.listen_interval >= 0)
2735 return -EINVAL;
2736 /*
2737 * No special handling for TDLS here -- the userspace
2738 * mesh code doesn't have this bug.
2739 */
2740 if (params.sta_flags_mask &
2741 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2742 BIT(NL80211_STA_FLAG_MFP) |
2743 BIT(NL80211_STA_FLAG_AUTHORIZED)))
2744 return -EINVAL;
2745 break;
2746 default:
2747 return -EOPNOTSUPP;
2748 }
2749
2750 /* be aware of params.vlan when changing code here */
2751
2752 err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, ¶ms);
2753
2754 if (params.vlan)
2755 dev_put(params.vlan);
2756
2757 return err;
2758 }
2759
2760 static struct nla_policy
2761 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2762 [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2763 [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2764 };
2765
nl80211_new_station(struct sk_buff * skb,struct genl_info * info)2766 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2767 {
2768 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2769 int err;
2770 struct net_device *dev = info->user_ptr[1];
2771 struct station_parameters params;
2772 u8 *mac_addr = NULL;
2773
2774 memset(¶ms, 0, sizeof(params));
2775
2776 if (!info->attrs[NL80211_ATTR_MAC])
2777 return -EINVAL;
2778
2779 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2780 return -EINVAL;
2781
2782 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2783 return -EINVAL;
2784
2785 if (!info->attrs[NL80211_ATTR_STA_AID])
2786 return -EINVAL;
2787
2788 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2789 params.supported_rates =
2790 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2791 params.supported_rates_len =
2792 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2793 params.listen_interval =
2794 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2795
2796 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2797 if (!params.aid || params.aid > IEEE80211_MAX_AID)
2798 return -EINVAL;
2799
2800 if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2801 params.ht_capa =
2802 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2803
2804 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2805 params.plink_action =
2806 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2807
2808 if (!rdev->ops->add_station)
2809 return -EOPNOTSUPP;
2810
2811 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, ¶ms))
2812 return -EINVAL;
2813
2814 switch (dev->ieee80211_ptr->iftype) {
2815 case NL80211_IFTYPE_AP:
2816 case NL80211_IFTYPE_AP_VLAN:
2817 case NL80211_IFTYPE_P2P_GO:
2818 /* parse WME attributes if sta is WME capable */
2819 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2820 (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2821 info->attrs[NL80211_ATTR_STA_WME]) {
2822 struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2823 struct nlattr *nla;
2824
2825 nla = info->attrs[NL80211_ATTR_STA_WME];
2826 err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2827 nl80211_sta_wme_policy);
2828 if (err)
2829 return err;
2830
2831 if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2832 params.uapsd_queues =
2833 nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2834 if (params.uapsd_queues &
2835 ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2836 return -EINVAL;
2837
2838 if (tb[NL80211_STA_WME_MAX_SP])
2839 params.max_sp =
2840 nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2841
2842 if (params.max_sp &
2843 ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2844 return -EINVAL;
2845
2846 params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2847 }
2848 /* TDLS peers cannot be added */
2849 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2850 return -EINVAL;
2851 /* but don't bother the driver with it */
2852 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2853
2854 /* must be last in here for error handling */
2855 params.vlan = get_vlan(info, rdev);
2856 if (IS_ERR(params.vlan))
2857 return PTR_ERR(params.vlan);
2858 break;
2859 case NL80211_IFTYPE_MESH_POINT:
2860 /* TDLS peers cannot be added */
2861 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2862 return -EINVAL;
2863 break;
2864 case NL80211_IFTYPE_STATION:
2865 /* Only TDLS peers can be added */
2866 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2867 return -EINVAL;
2868 /* Can only add if TDLS ... */
2869 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
2870 return -EOPNOTSUPP;
2871 /* ... with external setup is supported */
2872 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
2873 return -EOPNOTSUPP;
2874 break;
2875 default:
2876 return -EOPNOTSUPP;
2877 }
2878
2879 /* be aware of params.vlan when changing code here */
2880
2881 err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, ¶ms);
2882
2883 if (params.vlan)
2884 dev_put(params.vlan);
2885 return err;
2886 }
2887
nl80211_del_station(struct sk_buff * skb,struct genl_info * info)2888 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2889 {
2890 struct cfg80211_registered_device *rdev = info->user_ptr[0];
2891 struct net_device *dev = info->user_ptr[1];
2892 u8 *mac_addr = NULL;
2893
2894 if (info->attrs[NL80211_ATTR_MAC])
2895 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2896
2897 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2898 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2899 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2900 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2901 return -EINVAL;
2902
2903 if (!rdev->ops->del_station)
2904 return -EOPNOTSUPP;
2905
2906 return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2907 }
2908
nl80211_send_mpath(struct sk_buff * msg,u32 pid,u32 seq,int flags,struct net_device * dev,u8 * dst,u8 * next_hop,struct mpath_info * pinfo)2909 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2910 int flags, struct net_device *dev,
2911 u8 *dst, u8 *next_hop,
2912 struct mpath_info *pinfo)
2913 {
2914 void *hdr;
2915 struct nlattr *pinfoattr;
2916
2917 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2918 if (!hdr)
2919 return -1;
2920
2921 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2922 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2923 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2924
2925 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2926
2927 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2928 if (!pinfoattr)
2929 goto nla_put_failure;
2930 if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2931 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2932 pinfo->frame_qlen);
2933 if (pinfo->filled & MPATH_INFO_SN)
2934 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2935 pinfo->sn);
2936 if (pinfo->filled & MPATH_INFO_METRIC)
2937 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2938 pinfo->metric);
2939 if (pinfo->filled & MPATH_INFO_EXPTIME)
2940 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2941 pinfo->exptime);
2942 if (pinfo->filled & MPATH_INFO_FLAGS)
2943 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2944 pinfo->flags);
2945 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2946 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2947 pinfo->discovery_timeout);
2948 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2949 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2950 pinfo->discovery_retries);
2951
2952 nla_nest_end(msg, pinfoattr);
2953
2954 return genlmsg_end(msg, hdr);
2955
2956 nla_put_failure:
2957 genlmsg_cancel(msg, hdr);
2958 return -EMSGSIZE;
2959 }
2960
nl80211_dump_mpath(struct sk_buff * skb,struct netlink_callback * cb)2961 static int nl80211_dump_mpath(struct sk_buff *skb,
2962 struct netlink_callback *cb)
2963 {
2964 struct mpath_info pinfo;
2965 struct cfg80211_registered_device *dev;
2966 struct net_device *netdev;
2967 u8 dst[ETH_ALEN];
2968 u8 next_hop[ETH_ALEN];
2969 int path_idx = cb->args[1];
2970 int err;
2971
2972 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2973 if (err)
2974 return err;
2975
2976 if (!dev->ops->dump_mpath) {
2977 err = -EOPNOTSUPP;
2978 goto out_err;
2979 }
2980
2981 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2982 err = -EOPNOTSUPP;
2983 goto out_err;
2984 }
2985
2986 while (1) {
2987 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2988 dst, next_hop, &pinfo);
2989 if (err == -ENOENT)
2990 break;
2991 if (err)
2992 goto out_err;
2993
2994 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2995 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2996 netdev, dst, next_hop,
2997 &pinfo) < 0)
2998 goto out;
2999
3000 path_idx++;
3001 }
3002
3003
3004 out:
3005 cb->args[1] = path_idx;
3006 err = skb->len;
3007 out_err:
3008 nl80211_finish_netdev_dump(dev);
3009 return err;
3010 }
3011
nl80211_get_mpath(struct sk_buff * skb,struct genl_info * info)3012 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3013 {
3014 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3015 int err;
3016 struct net_device *dev = info->user_ptr[1];
3017 struct mpath_info pinfo;
3018 struct sk_buff *msg;
3019 u8 *dst = NULL;
3020 u8 next_hop[ETH_ALEN];
3021
3022 memset(&pinfo, 0, sizeof(pinfo));
3023
3024 if (!info->attrs[NL80211_ATTR_MAC])
3025 return -EINVAL;
3026
3027 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3028
3029 if (!rdev->ops->get_mpath)
3030 return -EOPNOTSUPP;
3031
3032 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3033 return -EOPNOTSUPP;
3034
3035 err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3036 if (err)
3037 return err;
3038
3039 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3040 if (!msg)
3041 return -ENOMEM;
3042
3043 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3044 dev, dst, next_hop, &pinfo) < 0) {
3045 nlmsg_free(msg);
3046 return -ENOBUFS;
3047 }
3048
3049 return genlmsg_reply(msg, info);
3050 }
3051
nl80211_set_mpath(struct sk_buff * skb,struct genl_info * info)3052 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3053 {
3054 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3055 struct net_device *dev = info->user_ptr[1];
3056 u8 *dst = NULL;
3057 u8 *next_hop = NULL;
3058
3059 if (!info->attrs[NL80211_ATTR_MAC])
3060 return -EINVAL;
3061
3062 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3063 return -EINVAL;
3064
3065 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3066 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3067
3068 if (!rdev->ops->change_mpath)
3069 return -EOPNOTSUPP;
3070
3071 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3072 return -EOPNOTSUPP;
3073
3074 return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3075 }
3076
nl80211_new_mpath(struct sk_buff * skb,struct genl_info * info)3077 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3078 {
3079 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3080 struct net_device *dev = info->user_ptr[1];
3081 u8 *dst = NULL;
3082 u8 *next_hop = NULL;
3083
3084 if (!info->attrs[NL80211_ATTR_MAC])
3085 return -EINVAL;
3086
3087 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3088 return -EINVAL;
3089
3090 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3091 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3092
3093 if (!rdev->ops->add_mpath)
3094 return -EOPNOTSUPP;
3095
3096 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3097 return -EOPNOTSUPP;
3098
3099 return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3100 }
3101
nl80211_del_mpath(struct sk_buff * skb,struct genl_info * info)3102 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3103 {
3104 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3105 struct net_device *dev = info->user_ptr[1];
3106 u8 *dst = NULL;
3107
3108 if (info->attrs[NL80211_ATTR_MAC])
3109 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3110
3111 if (!rdev->ops->del_mpath)
3112 return -EOPNOTSUPP;
3113
3114 return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3115 }
3116
nl80211_set_bss(struct sk_buff * skb,struct genl_info * info)3117 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3118 {
3119 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3120 struct net_device *dev = info->user_ptr[1];
3121 struct bss_parameters params;
3122
3123 memset(¶ms, 0, sizeof(params));
3124 /* default to not changing parameters */
3125 params.use_cts_prot = -1;
3126 params.use_short_preamble = -1;
3127 params.use_short_slot_time = -1;
3128 params.ap_isolate = -1;
3129 params.ht_opmode = -1;
3130
3131 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3132 params.use_cts_prot =
3133 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3134 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3135 params.use_short_preamble =
3136 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3137 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3138 params.use_short_slot_time =
3139 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3140 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3141 params.basic_rates =
3142 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3143 params.basic_rates_len =
3144 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3145 }
3146 if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3147 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3148 if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3149 params.ht_opmode =
3150 nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3151
3152 if (!rdev->ops->change_bss)
3153 return -EOPNOTSUPP;
3154
3155 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3156 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3157 return -EOPNOTSUPP;
3158
3159 return rdev->ops->change_bss(&rdev->wiphy, dev, ¶ms);
3160 }
3161
3162 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3163 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
3164 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
3165 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
3166 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
3167 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
3168 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
3169 };
3170
parse_reg_rule(struct nlattr * tb[],struct ieee80211_reg_rule * reg_rule)3171 static int parse_reg_rule(struct nlattr *tb[],
3172 struct ieee80211_reg_rule *reg_rule)
3173 {
3174 struct ieee80211_freq_range *freq_range = ®_rule->freq_range;
3175 struct ieee80211_power_rule *power_rule = ®_rule->power_rule;
3176
3177 if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3178 return -EINVAL;
3179 if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3180 return -EINVAL;
3181 if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3182 return -EINVAL;
3183 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3184 return -EINVAL;
3185 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3186 return -EINVAL;
3187
3188 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3189
3190 freq_range->start_freq_khz =
3191 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3192 freq_range->end_freq_khz =
3193 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3194 freq_range->max_bandwidth_khz =
3195 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3196
3197 power_rule->max_eirp =
3198 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3199
3200 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3201 power_rule->max_antenna_gain =
3202 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3203
3204 return 0;
3205 }
3206
nl80211_req_set_reg(struct sk_buff * skb,struct genl_info * info)3207 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3208 {
3209 int r;
3210 char *data = NULL;
3211
3212 /*
3213 * You should only get this when cfg80211 hasn't yet initialized
3214 * completely when built-in to the kernel right between the time
3215 * window between nl80211_init() and regulatory_init(), if that is
3216 * even possible.
3217 */
3218 mutex_lock(&cfg80211_mutex);
3219 if (unlikely(!cfg80211_regdomain)) {
3220 mutex_unlock(&cfg80211_mutex);
3221 return -EINPROGRESS;
3222 }
3223 mutex_unlock(&cfg80211_mutex);
3224
3225 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3226 return -EINVAL;
3227
3228 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3229
3230 r = regulatory_hint_user(data);
3231
3232 return r;
3233 }
3234
nl80211_get_mesh_config(struct sk_buff * skb,struct genl_info * info)3235 static int nl80211_get_mesh_config(struct sk_buff *skb,
3236 struct genl_info *info)
3237 {
3238 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3239 struct net_device *dev = info->user_ptr[1];
3240 struct wireless_dev *wdev = dev->ieee80211_ptr;
3241 struct mesh_config cur_params;
3242 int err = 0;
3243 void *hdr;
3244 struct nlattr *pinfoattr;
3245 struct sk_buff *msg;
3246
3247 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3248 return -EOPNOTSUPP;
3249
3250 if (!rdev->ops->get_mesh_config)
3251 return -EOPNOTSUPP;
3252
3253 wdev_lock(wdev);
3254 /* If not connected, get default parameters */
3255 if (!wdev->mesh_id_len)
3256 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3257 else
3258 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3259 &cur_params);
3260 wdev_unlock(wdev);
3261
3262 if (err)
3263 return err;
3264
3265 /* Draw up a netlink message to send back */
3266 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3267 if (!msg)
3268 return -ENOMEM;
3269 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3270 NL80211_CMD_GET_MESH_CONFIG);
3271 if (!hdr)
3272 goto out;
3273 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3274 if (!pinfoattr)
3275 goto nla_put_failure;
3276 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3277 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3278 cur_params.dot11MeshRetryTimeout);
3279 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3280 cur_params.dot11MeshConfirmTimeout);
3281 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3282 cur_params.dot11MeshHoldingTimeout);
3283 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3284 cur_params.dot11MeshMaxPeerLinks);
3285 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
3286 cur_params.dot11MeshMaxRetries);
3287 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
3288 cur_params.dot11MeshTTL);
3289 NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3290 cur_params.element_ttl);
3291 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3292 cur_params.auto_open_plinks);
3293 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3294 cur_params.dot11MeshHWMPmaxPREQretries);
3295 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3296 cur_params.path_refresh_time);
3297 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3298 cur_params.min_discovery_timeout);
3299 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3300 cur_params.dot11MeshHWMPactivePathTimeout);
3301 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3302 cur_params.dot11MeshHWMPpreqMinInterval);
3303 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3304 cur_params.dot11MeshHWMPperrMinInterval);
3305 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3306 cur_params.dot11MeshHWMPnetDiameterTraversalTime);
3307 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3308 cur_params.dot11MeshHWMPRootMode);
3309 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3310 cur_params.dot11MeshHWMPRannInterval);
3311 NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3312 cur_params.dot11MeshGateAnnouncementProtocol);
3313 NLA_PUT_U8(msg, NL80211_MESHCONF_FORWARDING,
3314 cur_params.dot11MeshForwarding);
3315 NLA_PUT_U32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3316 cur_params.rssi_threshold);
3317 nla_nest_end(msg, pinfoattr);
3318 genlmsg_end(msg, hdr);
3319 return genlmsg_reply(msg, info);
3320
3321 nla_put_failure:
3322 genlmsg_cancel(msg, hdr);
3323 out:
3324 nlmsg_free(msg);
3325 return -ENOBUFS;
3326 }
3327
3328 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3329 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3330 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3331 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3332 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3333 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3334 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3335 [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3336 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3337
3338 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3339 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3340 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3341 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3342 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3343 [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3344 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3345 [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3346 [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3347 [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3348 [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3349 [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32},
3350 };
3351
3352 static const struct nla_policy
3353 nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3354 [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3355 [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3356 [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3357 [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3358 .len = IEEE80211_MAX_DATA_LEN },
3359 [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3360 };
3361
nl80211_parse_mesh_config(struct genl_info * info,struct mesh_config * cfg,u32 * mask_out)3362 static int nl80211_parse_mesh_config(struct genl_info *info,
3363 struct mesh_config *cfg,
3364 u32 *mask_out)
3365 {
3366 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3367 u32 mask = 0;
3368
3369 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3370 do {\
3371 if (table[attr_num]) {\
3372 cfg->param = nla_fn(table[attr_num]); \
3373 mask |= (1 << (attr_num - 1)); \
3374 } \
3375 } while (0);\
3376
3377
3378 if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3379 return -EINVAL;
3380 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3381 info->attrs[NL80211_ATTR_MESH_CONFIG],
3382 nl80211_meshconf_params_policy))
3383 return -EINVAL;
3384
3385 /* This makes sure that there aren't more than 32 mesh config
3386 * parameters (otherwise our bitfield scheme would not work.) */
3387 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3388
3389 /* Fill in the params struct */
3390 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3391 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3392 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3393 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3394 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3395 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3396 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3397 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3398 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3399 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3400 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3401 mask, NL80211_MESHCONF_TTL, nla_get_u8);
3402 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3403 mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3404 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3405 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3406 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3407 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3408 nla_get_u8);
3409 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3410 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3411 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3412 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3413 nla_get_u16);
3414 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3415 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3416 nla_get_u32);
3417 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3418 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3419 nla_get_u16);
3420 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3421 mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3422 nla_get_u16);
3423 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3424 dot11MeshHWMPnetDiameterTraversalTime,
3425 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3426 nla_get_u16);
3427 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3428 dot11MeshHWMPRootMode, mask,
3429 NL80211_MESHCONF_HWMP_ROOTMODE,
3430 nla_get_u8);
3431 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3432 dot11MeshHWMPRannInterval, mask,
3433 NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3434 nla_get_u16);
3435 FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3436 dot11MeshGateAnnouncementProtocol, mask,
3437 NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3438 nla_get_u8);
3439 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3440 mask, NL80211_MESHCONF_FORWARDING, nla_get_u8);
3441 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3442 mask, NL80211_MESHCONF_RSSI_THRESHOLD, nla_get_u32);
3443 if (mask_out)
3444 *mask_out = mask;
3445
3446 return 0;
3447
3448 #undef FILL_IN_MESH_PARAM_IF_SET
3449 }
3450
nl80211_parse_mesh_setup(struct genl_info * info,struct mesh_setup * setup)3451 static int nl80211_parse_mesh_setup(struct genl_info *info,
3452 struct mesh_setup *setup)
3453 {
3454 struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3455
3456 if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3457 return -EINVAL;
3458 if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3459 info->attrs[NL80211_ATTR_MESH_SETUP],
3460 nl80211_mesh_setup_params_policy))
3461 return -EINVAL;
3462
3463 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3464 setup->path_sel_proto =
3465 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3466 IEEE80211_PATH_PROTOCOL_VENDOR :
3467 IEEE80211_PATH_PROTOCOL_HWMP;
3468
3469 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3470 setup->path_metric =
3471 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3472 IEEE80211_PATH_METRIC_VENDOR :
3473 IEEE80211_PATH_METRIC_AIRTIME;
3474
3475
3476 if (tb[NL80211_MESH_SETUP_IE]) {
3477 struct nlattr *ieattr =
3478 tb[NL80211_MESH_SETUP_IE];
3479 if (!is_valid_ie_attr(ieattr))
3480 return -EINVAL;
3481 setup->ie = nla_data(ieattr);
3482 setup->ie_len = nla_len(ieattr);
3483 }
3484 setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3485 setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3486
3487 return 0;
3488 }
3489
nl80211_update_mesh_config(struct sk_buff * skb,struct genl_info * info)3490 static int nl80211_update_mesh_config(struct sk_buff *skb,
3491 struct genl_info *info)
3492 {
3493 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3494 struct net_device *dev = info->user_ptr[1];
3495 struct wireless_dev *wdev = dev->ieee80211_ptr;
3496 struct mesh_config cfg;
3497 u32 mask;
3498 int err;
3499
3500 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3501 return -EOPNOTSUPP;
3502
3503 if (!rdev->ops->update_mesh_config)
3504 return -EOPNOTSUPP;
3505
3506 err = nl80211_parse_mesh_config(info, &cfg, &mask);
3507 if (err)
3508 return err;
3509
3510 wdev_lock(wdev);
3511 if (!wdev->mesh_id_len)
3512 err = -ENOLINK;
3513
3514 if (!err)
3515 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3516 mask, &cfg);
3517
3518 wdev_unlock(wdev);
3519
3520 return err;
3521 }
3522
nl80211_get_reg(struct sk_buff * skb,struct genl_info * info)3523 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3524 {
3525 struct sk_buff *msg;
3526 void *hdr = NULL;
3527 struct nlattr *nl_reg_rules;
3528 unsigned int i;
3529 int err = -EINVAL;
3530
3531 mutex_lock(&cfg80211_mutex);
3532
3533 if (!cfg80211_regdomain)
3534 goto out;
3535
3536 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3537 if (!msg) {
3538 err = -ENOBUFS;
3539 goto out;
3540 }
3541
3542 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3543 NL80211_CMD_GET_REG);
3544 if (!hdr)
3545 goto put_failure;
3546
3547 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3548 cfg80211_regdomain->alpha2);
3549 if (cfg80211_regdomain->dfs_region)
3550 NLA_PUT_U8(msg, NL80211_ATTR_DFS_REGION,
3551 cfg80211_regdomain->dfs_region);
3552
3553 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3554 if (!nl_reg_rules)
3555 goto nla_put_failure;
3556
3557 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3558 struct nlattr *nl_reg_rule;
3559 const struct ieee80211_reg_rule *reg_rule;
3560 const struct ieee80211_freq_range *freq_range;
3561 const struct ieee80211_power_rule *power_rule;
3562
3563 reg_rule = &cfg80211_regdomain->reg_rules[i];
3564 freq_range = ®_rule->freq_range;
3565 power_rule = ®_rule->power_rule;
3566
3567 nl_reg_rule = nla_nest_start(msg, i);
3568 if (!nl_reg_rule)
3569 goto nla_put_failure;
3570
3571 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3572 reg_rule->flags);
3573 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3574 freq_range->start_freq_khz);
3575 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3576 freq_range->end_freq_khz);
3577 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3578 freq_range->max_bandwidth_khz);
3579 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3580 power_rule->max_antenna_gain);
3581 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3582 power_rule->max_eirp);
3583
3584 nla_nest_end(msg, nl_reg_rule);
3585 }
3586
3587 nla_nest_end(msg, nl_reg_rules);
3588
3589 genlmsg_end(msg, hdr);
3590 err = genlmsg_reply(msg, info);
3591 goto out;
3592
3593 nla_put_failure:
3594 genlmsg_cancel(msg, hdr);
3595 put_failure:
3596 nlmsg_free(msg);
3597 err = -EMSGSIZE;
3598 out:
3599 mutex_unlock(&cfg80211_mutex);
3600 return err;
3601 }
3602
nl80211_set_reg(struct sk_buff * skb,struct genl_info * info)3603 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3604 {
3605 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3606 struct nlattr *nl_reg_rule;
3607 char *alpha2 = NULL;
3608 int rem_reg_rules = 0, r = 0;
3609 u32 num_rules = 0, rule_idx = 0, size_of_regd;
3610 u8 dfs_region = 0;
3611 struct ieee80211_regdomain *rd = NULL;
3612
3613 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3614 return -EINVAL;
3615
3616 if (!info->attrs[NL80211_ATTR_REG_RULES])
3617 return -EINVAL;
3618
3619 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3620
3621 if (info->attrs[NL80211_ATTR_DFS_REGION])
3622 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3623
3624 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3625 rem_reg_rules) {
3626 num_rules++;
3627 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3628 return -EINVAL;
3629 }
3630
3631 mutex_lock(&cfg80211_mutex);
3632
3633 if (!reg_is_valid_request(alpha2)) {
3634 r = -EINVAL;
3635 goto bad_reg;
3636 }
3637
3638 size_of_regd = sizeof(struct ieee80211_regdomain) +
3639 (num_rules * sizeof(struct ieee80211_reg_rule));
3640
3641 rd = kzalloc(size_of_regd, GFP_KERNEL);
3642 if (!rd) {
3643 r = -ENOMEM;
3644 goto bad_reg;
3645 }
3646
3647 rd->n_reg_rules = num_rules;
3648 rd->alpha2[0] = alpha2[0];
3649 rd->alpha2[1] = alpha2[1];
3650
3651 /*
3652 * Disable DFS master mode if the DFS region was
3653 * not supported or known on this kernel.
3654 */
3655 if (reg_supported_dfs_region(dfs_region))
3656 rd->dfs_region = dfs_region;
3657
3658 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3659 rem_reg_rules) {
3660 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3661 nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3662 reg_rule_policy);
3663 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3664 if (r)
3665 goto bad_reg;
3666
3667 rule_idx++;
3668
3669 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3670 r = -EINVAL;
3671 goto bad_reg;
3672 }
3673 }
3674
3675 BUG_ON(rule_idx != num_rules);
3676
3677 r = set_regdom(rd);
3678
3679 mutex_unlock(&cfg80211_mutex);
3680
3681 return r;
3682
3683 bad_reg:
3684 mutex_unlock(&cfg80211_mutex);
3685 kfree(rd);
3686 return r;
3687 }
3688
validate_scan_freqs(struct nlattr * freqs)3689 static int validate_scan_freqs(struct nlattr *freqs)
3690 {
3691 struct nlattr *attr1, *attr2;
3692 int n_channels = 0, tmp1, tmp2;
3693
3694 nla_for_each_nested(attr1, freqs, tmp1) {
3695 n_channels++;
3696 /*
3697 * Some hardware has a limited channel list for
3698 * scanning, and it is pretty much nonsensical
3699 * to scan for a channel twice, so disallow that
3700 * and don't require drivers to check that the
3701 * channel list they get isn't longer than what
3702 * they can scan, as long as they can scan all
3703 * the channels they registered at once.
3704 */
3705 nla_for_each_nested(attr2, freqs, tmp2)
3706 if (attr1 != attr2 &&
3707 nla_get_u32(attr1) == nla_get_u32(attr2))
3708 return 0;
3709 }
3710
3711 return n_channels;
3712 }
3713
nl80211_trigger_scan(struct sk_buff * skb,struct genl_info * info)3714 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3715 {
3716 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3717 struct net_device *dev = info->user_ptr[1];
3718 struct cfg80211_scan_request *request;
3719 struct nlattr *attr;
3720 struct wiphy *wiphy;
3721 int err, tmp, n_ssids = 0, n_channels, i;
3722 size_t ie_len;
3723
3724 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3725 return -EINVAL;
3726
3727 wiphy = &rdev->wiphy;
3728
3729 if (!rdev->ops->scan)
3730 return -EOPNOTSUPP;
3731
3732 if (rdev->scan_req)
3733 return -EBUSY;
3734
3735 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3736 n_channels = validate_scan_freqs(
3737 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3738 if (!n_channels)
3739 return -EINVAL;
3740 } else {
3741 enum ieee80211_band band;
3742 n_channels = 0;
3743
3744 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3745 if (wiphy->bands[band])
3746 n_channels += wiphy->bands[band]->n_channels;
3747 }
3748
3749 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3750 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3751 n_ssids++;
3752
3753 if (n_ssids > wiphy->max_scan_ssids)
3754 return -EINVAL;
3755
3756 if (info->attrs[NL80211_ATTR_IE])
3757 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3758 else
3759 ie_len = 0;
3760
3761 if (ie_len > wiphy->max_scan_ie_len)
3762 return -EINVAL;
3763
3764 request = kzalloc(sizeof(*request)
3765 + sizeof(*request->ssids) * n_ssids
3766 + sizeof(*request->channels) * n_channels
3767 + ie_len, GFP_KERNEL);
3768 if (!request)
3769 return -ENOMEM;
3770
3771 if (n_ssids)
3772 request->ssids = (void *)&request->channels[n_channels];
3773 request->n_ssids = n_ssids;
3774 if (ie_len) {
3775 if (request->ssids)
3776 request->ie = (void *)(request->ssids + n_ssids);
3777 else
3778 request->ie = (void *)(request->channels + n_channels);
3779 }
3780
3781 i = 0;
3782 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3783 /* user specified, bail out if channel not found */
3784 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3785 struct ieee80211_channel *chan;
3786
3787 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3788
3789 if (!chan) {
3790 err = -EINVAL;
3791 goto out_free;
3792 }
3793
3794 /* ignore disabled channels */
3795 if (chan->flags & IEEE80211_CHAN_DISABLED)
3796 continue;
3797
3798 request->channels[i] = chan;
3799 i++;
3800 }
3801 } else {
3802 enum ieee80211_band band;
3803
3804 /* all channels */
3805 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3806 int j;
3807 if (!wiphy->bands[band])
3808 continue;
3809 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3810 struct ieee80211_channel *chan;
3811
3812 chan = &wiphy->bands[band]->channels[j];
3813
3814 if (chan->flags & IEEE80211_CHAN_DISABLED)
3815 continue;
3816
3817 request->channels[i] = chan;
3818 i++;
3819 }
3820 }
3821 }
3822
3823 if (!i) {
3824 err = -EINVAL;
3825 goto out_free;
3826 }
3827
3828 request->n_channels = i;
3829
3830 i = 0;
3831 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3832 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3833 if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3834 err = -EINVAL;
3835 goto out_free;
3836 }
3837 request->ssids[i].ssid_len = nla_len(attr);
3838 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3839 i++;
3840 }
3841 }
3842
3843 if (info->attrs[NL80211_ATTR_IE]) {
3844 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3845 memcpy((void *)request->ie,
3846 nla_data(info->attrs[NL80211_ATTR_IE]),
3847 request->ie_len);
3848 }
3849
3850 for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3851 if (wiphy->bands[i])
3852 request->rates[i] =
3853 (1 << wiphy->bands[i]->n_bitrates) - 1;
3854
3855 if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3856 nla_for_each_nested(attr,
3857 info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3858 tmp) {
3859 enum ieee80211_band band = nla_type(attr);
3860
3861 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3862 err = -EINVAL;
3863 goto out_free;
3864 }
3865 err = ieee80211_get_ratemask(wiphy->bands[band],
3866 nla_data(attr),
3867 nla_len(attr),
3868 &request->rates[band]);
3869 if (err)
3870 goto out_free;
3871 }
3872 }
3873
3874 request->no_cck =
3875 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3876
3877 request->dev = dev;
3878 request->wiphy = &rdev->wiphy;
3879
3880 rdev->scan_req = request;
3881 err = rdev->ops->scan(&rdev->wiphy, dev, request);
3882
3883 if (!err) {
3884 nl80211_send_scan_start(rdev, dev);
3885 dev_hold(dev);
3886 } else {
3887 out_free:
3888 rdev->scan_req = NULL;
3889 kfree(request);
3890 }
3891
3892 return err;
3893 }
3894
nl80211_start_sched_scan(struct sk_buff * skb,struct genl_info * info)3895 static int nl80211_start_sched_scan(struct sk_buff *skb,
3896 struct genl_info *info)
3897 {
3898 struct cfg80211_sched_scan_request *request;
3899 struct cfg80211_registered_device *rdev = info->user_ptr[0];
3900 struct net_device *dev = info->user_ptr[1];
3901 struct nlattr *attr;
3902 struct wiphy *wiphy;
3903 int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
3904 u32 interval;
3905 enum ieee80211_band band;
3906 size_t ie_len;
3907 struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
3908
3909 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3910 !rdev->ops->sched_scan_start)
3911 return -EOPNOTSUPP;
3912
3913 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3914 return -EINVAL;
3915
3916 if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3917 return -EINVAL;
3918
3919 interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3920 if (interval == 0)
3921 return -EINVAL;
3922
3923 wiphy = &rdev->wiphy;
3924
3925 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3926 n_channels = validate_scan_freqs(
3927 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3928 if (!n_channels)
3929 return -EINVAL;
3930 } else {
3931 n_channels = 0;
3932
3933 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3934 if (wiphy->bands[band])
3935 n_channels += wiphy->bands[band]->n_channels;
3936 }
3937
3938 if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3939 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3940 tmp)
3941 n_ssids++;
3942
3943 if (n_ssids > wiphy->max_sched_scan_ssids)
3944 return -EINVAL;
3945
3946 if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
3947 nla_for_each_nested(attr,
3948 info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3949 tmp)
3950 n_match_sets++;
3951
3952 if (n_match_sets > wiphy->max_match_sets)
3953 return -EINVAL;
3954
3955 if (info->attrs[NL80211_ATTR_IE])
3956 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3957 else
3958 ie_len = 0;
3959
3960 if (ie_len > wiphy->max_sched_scan_ie_len)
3961 return -EINVAL;
3962
3963 mutex_lock(&rdev->sched_scan_mtx);
3964
3965 if (rdev->sched_scan_req) {
3966 err = -EINPROGRESS;
3967 goto out;
3968 }
3969
3970 request = kzalloc(sizeof(*request)
3971 + sizeof(*request->ssids) * n_ssids
3972 + sizeof(*request->match_sets) * n_match_sets
3973 + sizeof(*request->channels) * n_channels
3974 + ie_len, GFP_KERNEL);
3975 if (!request) {
3976 err = -ENOMEM;
3977 goto out;
3978 }
3979
3980 if (n_ssids)
3981 request->ssids = (void *)&request->channels[n_channels];
3982 request->n_ssids = n_ssids;
3983 if (ie_len) {
3984 if (request->ssids)
3985 request->ie = (void *)(request->ssids + n_ssids);
3986 else
3987 request->ie = (void *)(request->channels + n_channels);
3988 }
3989
3990 if (n_match_sets) {
3991 if (request->ie)
3992 request->match_sets = (void *)(request->ie + ie_len);
3993 else if (request->ssids)
3994 request->match_sets =
3995 (void *)(request->ssids + n_ssids);
3996 else
3997 request->match_sets =
3998 (void *)(request->channels + n_channels);
3999 }
4000 request->n_match_sets = n_match_sets;
4001
4002 i = 0;
4003 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4004 /* user specified, bail out if channel not found */
4005 nla_for_each_nested(attr,
4006 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4007 tmp) {
4008 struct ieee80211_channel *chan;
4009
4010 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4011
4012 if (!chan) {
4013 err = -EINVAL;
4014 goto out_free;
4015 }
4016
4017 /* ignore disabled channels */
4018 if (chan->flags & IEEE80211_CHAN_DISABLED)
4019 continue;
4020
4021 request->channels[i] = chan;
4022 i++;
4023 }
4024 } else {
4025 /* all channels */
4026 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4027 int j;
4028 if (!wiphy->bands[band])
4029 continue;
4030 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4031 struct ieee80211_channel *chan;
4032
4033 chan = &wiphy->bands[band]->channels[j];
4034
4035 if (chan->flags & IEEE80211_CHAN_DISABLED)
4036 continue;
4037
4038 request->channels[i] = chan;
4039 i++;
4040 }
4041 }
4042 }
4043
4044 if (!i) {
4045 err = -EINVAL;
4046 goto out_free;
4047 }
4048
4049 request->n_channels = i;
4050
4051 i = 0;
4052 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4053 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4054 tmp) {
4055 if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4056 err = -EINVAL;
4057 goto out_free;
4058 }
4059 request->ssids[i].ssid_len = nla_len(attr);
4060 memcpy(request->ssids[i].ssid, nla_data(attr),
4061 nla_len(attr));
4062 i++;
4063 }
4064 }
4065
4066 i = 0;
4067 if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4068 nla_for_each_nested(attr,
4069 info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4070 tmp) {
4071 struct nlattr *ssid;
4072
4073 nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4074 nla_data(attr), nla_len(attr),
4075 nl80211_match_policy);
4076 ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
4077 if (ssid) {
4078 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4079 err = -EINVAL;
4080 goto out_free;
4081 }
4082 memcpy(request->match_sets[i].ssid.ssid,
4083 nla_data(ssid), nla_len(ssid));
4084 request->match_sets[i].ssid.ssid_len =
4085 nla_len(ssid);
4086 }
4087 i++;
4088 }
4089 }
4090
4091 if (info->attrs[NL80211_ATTR_IE]) {
4092 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4093 memcpy((void *)request->ie,
4094 nla_data(info->attrs[NL80211_ATTR_IE]),
4095 request->ie_len);
4096 }
4097
4098 request->dev = dev;
4099 request->wiphy = &rdev->wiphy;
4100 request->interval = interval;
4101
4102 err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4103 if (!err) {
4104 rdev->sched_scan_req = request;
4105 nl80211_send_sched_scan(rdev, dev,
4106 NL80211_CMD_START_SCHED_SCAN);
4107 goto out;
4108 }
4109
4110 out_free:
4111 kfree(request);
4112 out:
4113 mutex_unlock(&rdev->sched_scan_mtx);
4114 return err;
4115 }
4116
nl80211_stop_sched_scan(struct sk_buff * skb,struct genl_info * info)4117 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4118 struct genl_info *info)
4119 {
4120 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4121 int err;
4122
4123 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4124 !rdev->ops->sched_scan_stop)
4125 return -EOPNOTSUPP;
4126
4127 mutex_lock(&rdev->sched_scan_mtx);
4128 err = __cfg80211_stop_sched_scan(rdev, false);
4129 mutex_unlock(&rdev->sched_scan_mtx);
4130
4131 return err;
4132 }
4133
nl80211_send_bss(struct sk_buff * msg,struct netlink_callback * cb,u32 seq,int flags,struct cfg80211_registered_device * rdev,struct wireless_dev * wdev,struct cfg80211_internal_bss * intbss)4134 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4135 u32 seq, int flags,
4136 struct cfg80211_registered_device *rdev,
4137 struct wireless_dev *wdev,
4138 struct cfg80211_internal_bss *intbss)
4139 {
4140 struct cfg80211_bss *res = &intbss->pub;
4141 void *hdr;
4142 struct nlattr *bss;
4143
4144 ASSERT_WDEV_LOCK(wdev);
4145
4146 hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4147 NL80211_CMD_NEW_SCAN_RESULTS);
4148 if (!hdr)
4149 return -1;
4150
4151 genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4152
4153 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
4154 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
4155
4156 bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4157 if (!bss)
4158 goto nla_put_failure;
4159 if (!is_zero_ether_addr(res->bssid))
4160 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
4161 if (res->information_elements && res->len_information_elements)
4162 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4163 res->len_information_elements,
4164 res->information_elements);
4165 if (res->beacon_ies && res->len_beacon_ies &&
4166 res->beacon_ies != res->information_elements)
4167 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
4168 res->len_beacon_ies, res->beacon_ies);
4169 if (res->tsf)
4170 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
4171 if (res->beacon_interval)
4172 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
4173 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
4174 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
4175 NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
4176 jiffies_to_msecs(jiffies - intbss->ts));
4177
4178 switch (rdev->wiphy.signal_type) {
4179 case CFG80211_SIGNAL_TYPE_MBM:
4180 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
4181 break;
4182 case CFG80211_SIGNAL_TYPE_UNSPEC:
4183 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
4184 break;
4185 default:
4186 break;
4187 }
4188
4189 switch (wdev->iftype) {
4190 case NL80211_IFTYPE_P2P_CLIENT:
4191 case NL80211_IFTYPE_STATION:
4192 if (intbss == wdev->current_bss)
4193 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4194 NL80211_BSS_STATUS_ASSOCIATED);
4195 break;
4196 case NL80211_IFTYPE_ADHOC:
4197 if (intbss == wdev->current_bss)
4198 NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4199 NL80211_BSS_STATUS_IBSS_JOINED);
4200 break;
4201 default:
4202 break;
4203 }
4204
4205 nla_nest_end(msg, bss);
4206
4207 return genlmsg_end(msg, hdr);
4208
4209 nla_put_failure:
4210 genlmsg_cancel(msg, hdr);
4211 return -EMSGSIZE;
4212 }
4213
nl80211_dump_scan(struct sk_buff * skb,struct netlink_callback * cb)4214 static int nl80211_dump_scan(struct sk_buff *skb,
4215 struct netlink_callback *cb)
4216 {
4217 struct cfg80211_registered_device *rdev;
4218 struct net_device *dev;
4219 struct cfg80211_internal_bss *scan;
4220 struct wireless_dev *wdev;
4221 int start = cb->args[1], idx = 0;
4222 int err;
4223
4224 err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4225 if (err)
4226 return err;
4227
4228 wdev = dev->ieee80211_ptr;
4229
4230 wdev_lock(wdev);
4231 spin_lock_bh(&rdev->bss_lock);
4232 cfg80211_bss_expire(rdev);
4233
4234 cb->seq = rdev->bss_generation;
4235
4236 list_for_each_entry(scan, &rdev->bss_list, list) {
4237 if (++idx <= start)
4238 continue;
4239 if (nl80211_send_bss(skb, cb,
4240 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4241 rdev, wdev, scan) < 0) {
4242 idx--;
4243 break;
4244 }
4245 }
4246
4247 spin_unlock_bh(&rdev->bss_lock);
4248 wdev_unlock(wdev);
4249
4250 cb->args[1] = idx;
4251 nl80211_finish_netdev_dump(rdev);
4252
4253 return skb->len;
4254 }
4255
nl80211_send_survey(struct sk_buff * msg,u32 pid,u32 seq,int flags,struct net_device * dev,struct survey_info * survey)4256 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4257 int flags, struct net_device *dev,
4258 struct survey_info *survey)
4259 {
4260 void *hdr;
4261 struct nlattr *infoattr;
4262
4263 hdr = nl80211hdr_put(msg, pid, seq, flags,
4264 NL80211_CMD_NEW_SURVEY_RESULTS);
4265 if (!hdr)
4266 return -ENOMEM;
4267
4268 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
4269
4270 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4271 if (!infoattr)
4272 goto nla_put_failure;
4273
4274 NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4275 survey->channel->center_freq);
4276 if (survey->filled & SURVEY_INFO_NOISE_DBM)
4277 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
4278 survey->noise);
4279 if (survey->filled & SURVEY_INFO_IN_USE)
4280 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
4281 if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
4282 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4283 survey->channel_time);
4284 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
4285 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4286 survey->channel_time_busy);
4287 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
4288 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4289 survey->channel_time_ext_busy);
4290 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
4291 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4292 survey->channel_time_rx);
4293 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
4294 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4295 survey->channel_time_tx);
4296
4297 nla_nest_end(msg, infoattr);
4298
4299 return genlmsg_end(msg, hdr);
4300
4301 nla_put_failure:
4302 genlmsg_cancel(msg, hdr);
4303 return -EMSGSIZE;
4304 }
4305
nl80211_dump_survey(struct sk_buff * skb,struct netlink_callback * cb)4306 static int nl80211_dump_survey(struct sk_buff *skb,
4307 struct netlink_callback *cb)
4308 {
4309 struct survey_info survey;
4310 struct cfg80211_registered_device *dev;
4311 struct net_device *netdev;
4312 int survey_idx = cb->args[1];
4313 int res;
4314
4315 res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4316 if (res)
4317 return res;
4318
4319 if (!dev->ops->dump_survey) {
4320 res = -EOPNOTSUPP;
4321 goto out_err;
4322 }
4323
4324 while (1) {
4325 struct ieee80211_channel *chan;
4326
4327 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4328 &survey);
4329 if (res == -ENOENT)
4330 break;
4331 if (res)
4332 goto out_err;
4333
4334 /* Survey without a channel doesn't make sense */
4335 if (!survey.channel) {
4336 res = -EINVAL;
4337 goto out;
4338 }
4339
4340 chan = ieee80211_get_channel(&dev->wiphy,
4341 survey.channel->center_freq);
4342 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4343 survey_idx++;
4344 continue;
4345 }
4346
4347 if (nl80211_send_survey(skb,
4348 NETLINK_CB(cb->skb).pid,
4349 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4350 netdev,
4351 &survey) < 0)
4352 goto out;
4353 survey_idx++;
4354 }
4355
4356 out:
4357 cb->args[1] = survey_idx;
4358 res = skb->len;
4359 out_err:
4360 nl80211_finish_netdev_dump(dev);
4361 return res;
4362 }
4363
nl80211_valid_auth_type(enum nl80211_auth_type auth_type)4364 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4365 {
4366 return auth_type <= NL80211_AUTHTYPE_MAX;
4367 }
4368
nl80211_valid_wpa_versions(u32 wpa_versions)4369 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4370 {
4371 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4372 NL80211_WPA_VERSION_2));
4373 }
4374
nl80211_authenticate(struct sk_buff * skb,struct genl_info * info)4375 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4376 {
4377 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4378 struct net_device *dev = info->user_ptr[1];
4379 struct ieee80211_channel *chan;
4380 const u8 *bssid, *ssid, *ie = NULL;
4381 int err, ssid_len, ie_len = 0;
4382 enum nl80211_auth_type auth_type;
4383 struct key_parse key;
4384 bool local_state_change;
4385
4386 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4387 return -EINVAL;
4388
4389 if (!info->attrs[NL80211_ATTR_MAC])
4390 return -EINVAL;
4391
4392 if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4393 return -EINVAL;
4394
4395 if (!info->attrs[NL80211_ATTR_SSID])
4396 return -EINVAL;
4397
4398 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4399 return -EINVAL;
4400
4401 err = nl80211_parse_key(info, &key);
4402 if (err)
4403 return err;
4404
4405 if (key.idx >= 0) {
4406 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4407 return -EINVAL;
4408 if (!key.p.key || !key.p.key_len)
4409 return -EINVAL;
4410 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4411 key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4412 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4413 key.p.key_len != WLAN_KEY_LEN_WEP104))
4414 return -EINVAL;
4415 if (key.idx > 4)
4416 return -EINVAL;
4417 } else {
4418 key.p.key_len = 0;
4419 key.p.key = NULL;
4420 }
4421
4422 if (key.idx >= 0) {
4423 int i;
4424 bool ok = false;
4425 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4426 if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4427 ok = true;
4428 break;
4429 }
4430 }
4431 if (!ok)
4432 return -EINVAL;
4433 }
4434
4435 if (!rdev->ops->auth)
4436 return -EOPNOTSUPP;
4437
4438 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4439 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4440 return -EOPNOTSUPP;
4441
4442 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4443 chan = ieee80211_get_channel(&rdev->wiphy,
4444 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4445 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4446 return -EINVAL;
4447
4448 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4449 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4450
4451 if (info->attrs[NL80211_ATTR_IE]) {
4452 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4453 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4454 }
4455
4456 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4457 if (!nl80211_valid_auth_type(auth_type))
4458 return -EINVAL;
4459
4460 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4461
4462 /*
4463 * Since we no longer track auth state, ignore
4464 * requests to only change local state.
4465 */
4466 if (local_state_change)
4467 return 0;
4468
4469 return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4470 ssid, ssid_len, ie, ie_len,
4471 key.p.key, key.p.key_len, key.idx);
4472 }
4473
nl80211_crypto_settings(struct cfg80211_registered_device * rdev,struct genl_info * info,struct cfg80211_crypto_settings * settings,int cipher_limit)4474 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4475 struct genl_info *info,
4476 struct cfg80211_crypto_settings *settings,
4477 int cipher_limit)
4478 {
4479 memset(settings, 0, sizeof(*settings));
4480
4481 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4482
4483 if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4484 u16 proto;
4485 proto = nla_get_u16(
4486 info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4487 settings->control_port_ethertype = cpu_to_be16(proto);
4488 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4489 proto != ETH_P_PAE)
4490 return -EINVAL;
4491 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4492 settings->control_port_no_encrypt = true;
4493 } else
4494 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4495
4496 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4497 void *data;
4498 int len, i;
4499
4500 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4501 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4502 settings->n_ciphers_pairwise = len / sizeof(u32);
4503
4504 if (len % sizeof(u32))
4505 return -EINVAL;
4506
4507 if (settings->n_ciphers_pairwise > cipher_limit)
4508 return -EINVAL;
4509
4510 memcpy(settings->ciphers_pairwise, data, len);
4511
4512 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4513 if (!cfg80211_supported_cipher_suite(
4514 &rdev->wiphy,
4515 settings->ciphers_pairwise[i]))
4516 return -EINVAL;
4517 }
4518
4519 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4520 settings->cipher_group =
4521 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4522 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4523 settings->cipher_group))
4524 return -EINVAL;
4525 }
4526
4527 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4528 settings->wpa_versions =
4529 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4530 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4531 return -EINVAL;
4532 }
4533
4534 if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4535 void *data;
4536 int len;
4537
4538 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4539 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4540 settings->n_akm_suites = len / sizeof(u32);
4541
4542 if (len % sizeof(u32))
4543 return -EINVAL;
4544
4545 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4546 return -EINVAL;
4547
4548 memcpy(settings->akm_suites, data, len);
4549 }
4550
4551 return 0;
4552 }
4553
nl80211_associate(struct sk_buff * skb,struct genl_info * info)4554 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4555 {
4556 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4557 struct net_device *dev = info->user_ptr[1];
4558 struct cfg80211_crypto_settings crypto;
4559 struct ieee80211_channel *chan;
4560 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4561 int err, ssid_len, ie_len = 0;
4562 bool use_mfp = false;
4563 u32 flags = 0;
4564 struct ieee80211_ht_cap *ht_capa = NULL;
4565 struct ieee80211_ht_cap *ht_capa_mask = NULL;
4566
4567 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4568 return -EINVAL;
4569
4570 if (!info->attrs[NL80211_ATTR_MAC] ||
4571 !info->attrs[NL80211_ATTR_SSID] ||
4572 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4573 return -EINVAL;
4574
4575 if (!rdev->ops->assoc)
4576 return -EOPNOTSUPP;
4577
4578 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4579 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4580 return -EOPNOTSUPP;
4581
4582 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4583
4584 chan = ieee80211_get_channel(&rdev->wiphy,
4585 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4586 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4587 return -EINVAL;
4588
4589 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4590 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4591
4592 if (info->attrs[NL80211_ATTR_IE]) {
4593 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4594 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4595 }
4596
4597 if (info->attrs[NL80211_ATTR_USE_MFP]) {
4598 enum nl80211_mfp mfp =
4599 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4600 if (mfp == NL80211_MFP_REQUIRED)
4601 use_mfp = true;
4602 else if (mfp != NL80211_MFP_NO)
4603 return -EINVAL;
4604 }
4605
4606 if (info->attrs[NL80211_ATTR_PREV_BSSID])
4607 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4608
4609 if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4610 flags |= ASSOC_REQ_DISABLE_HT;
4611
4612 if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4613 ht_capa_mask =
4614 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4615
4616 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4617 if (!ht_capa_mask)
4618 return -EINVAL;
4619 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4620 }
4621
4622 err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4623 if (!err)
4624 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4625 ssid, ssid_len, ie, ie_len, use_mfp,
4626 &crypto, flags, ht_capa,
4627 ht_capa_mask);
4628
4629 return err;
4630 }
4631
nl80211_deauthenticate(struct sk_buff * skb,struct genl_info * info)4632 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4633 {
4634 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4635 struct net_device *dev = info->user_ptr[1];
4636 const u8 *ie = NULL, *bssid;
4637 int ie_len = 0;
4638 u16 reason_code;
4639 bool local_state_change;
4640
4641 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4642 return -EINVAL;
4643
4644 if (!info->attrs[NL80211_ATTR_MAC])
4645 return -EINVAL;
4646
4647 if (!info->attrs[NL80211_ATTR_REASON_CODE])
4648 return -EINVAL;
4649
4650 if (!rdev->ops->deauth)
4651 return -EOPNOTSUPP;
4652
4653 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4654 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4655 return -EOPNOTSUPP;
4656
4657 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4658
4659 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4660 if (reason_code == 0) {
4661 /* Reason Code 0 is reserved */
4662 return -EINVAL;
4663 }
4664
4665 if (info->attrs[NL80211_ATTR_IE]) {
4666 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4667 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4668 }
4669
4670 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4671
4672 return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4673 local_state_change);
4674 }
4675
nl80211_disassociate(struct sk_buff * skb,struct genl_info * info)4676 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4677 {
4678 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4679 struct net_device *dev = info->user_ptr[1];
4680 const u8 *ie = NULL, *bssid;
4681 int ie_len = 0;
4682 u16 reason_code;
4683 bool local_state_change;
4684
4685 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4686 return -EINVAL;
4687
4688 if (!info->attrs[NL80211_ATTR_MAC])
4689 return -EINVAL;
4690
4691 if (!info->attrs[NL80211_ATTR_REASON_CODE])
4692 return -EINVAL;
4693
4694 if (!rdev->ops->disassoc)
4695 return -EOPNOTSUPP;
4696
4697 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4698 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4699 return -EOPNOTSUPP;
4700
4701 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4702
4703 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4704 if (reason_code == 0) {
4705 /* Reason Code 0 is reserved */
4706 return -EINVAL;
4707 }
4708
4709 if (info->attrs[NL80211_ATTR_IE]) {
4710 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4711 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4712 }
4713
4714 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4715
4716 return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4717 local_state_change);
4718 }
4719
4720 static bool
nl80211_parse_mcast_rate(struct cfg80211_registered_device * rdev,int mcast_rate[IEEE80211_NUM_BANDS],int rateval)4721 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4722 int mcast_rate[IEEE80211_NUM_BANDS],
4723 int rateval)
4724 {
4725 struct wiphy *wiphy = &rdev->wiphy;
4726 bool found = false;
4727 int band, i;
4728
4729 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4730 struct ieee80211_supported_band *sband;
4731
4732 sband = wiphy->bands[band];
4733 if (!sband)
4734 continue;
4735
4736 for (i = 0; i < sband->n_bitrates; i++) {
4737 if (sband->bitrates[i].bitrate == rateval) {
4738 mcast_rate[band] = i + 1;
4739 found = true;
4740 break;
4741 }
4742 }
4743 }
4744
4745 return found;
4746 }
4747
nl80211_join_ibss(struct sk_buff * skb,struct genl_info * info)4748 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4749 {
4750 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4751 struct net_device *dev = info->user_ptr[1];
4752 struct cfg80211_ibss_params ibss;
4753 struct wiphy *wiphy;
4754 struct cfg80211_cached_keys *connkeys = NULL;
4755 int err;
4756
4757 memset(&ibss, 0, sizeof(ibss));
4758
4759 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4760 return -EINVAL;
4761
4762 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4763 !info->attrs[NL80211_ATTR_SSID] ||
4764 !nla_len(info->attrs[NL80211_ATTR_SSID]))
4765 return -EINVAL;
4766
4767 ibss.beacon_interval = 100;
4768
4769 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4770 ibss.beacon_interval =
4771 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4772 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4773 return -EINVAL;
4774 }
4775
4776 if (!rdev->ops->join_ibss)
4777 return -EOPNOTSUPP;
4778
4779 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4780 return -EOPNOTSUPP;
4781
4782 wiphy = &rdev->wiphy;
4783
4784 if (info->attrs[NL80211_ATTR_MAC]) {
4785 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4786
4787 if (!is_valid_ether_addr(ibss.bssid))
4788 return -EINVAL;
4789 }
4790 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4791 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4792
4793 if (info->attrs[NL80211_ATTR_IE]) {
4794 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4795 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4796 }
4797
4798 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4799 enum nl80211_channel_type channel_type;
4800
4801 channel_type = nla_get_u32(
4802 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4803 if (channel_type != NL80211_CHAN_NO_HT &&
4804 channel_type != NL80211_CHAN_HT20 &&
4805 channel_type != NL80211_CHAN_HT40MINUS &&
4806 channel_type != NL80211_CHAN_HT40PLUS)
4807 return -EINVAL;
4808
4809 if (channel_type != NL80211_CHAN_NO_HT &&
4810 !(wiphy->features & NL80211_FEATURE_HT_IBSS))
4811 return -EINVAL;
4812
4813 ibss.channel_type = channel_type;
4814 } else {
4815 ibss.channel_type = NL80211_CHAN_NO_HT;
4816 }
4817
4818 ibss.channel = rdev_freq_to_chan(rdev,
4819 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
4820 ibss.channel_type);
4821 if (!ibss.channel ||
4822 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4823 ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4824 return -EINVAL;
4825
4826 /* Both channels should be able to initiate communication */
4827 if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
4828 ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
4829 !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
4830 ibss.channel_type))
4831 return -EINVAL;
4832
4833 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4834 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4835
4836 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4837 u8 *rates =
4838 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4839 int n_rates =
4840 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4841 struct ieee80211_supported_band *sband =
4842 wiphy->bands[ibss.channel->band];
4843
4844 err = ieee80211_get_ratemask(sband, rates, n_rates,
4845 &ibss.basic_rates);
4846 if (err)
4847 return err;
4848 }
4849
4850 if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4851 !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4852 nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4853 return -EINVAL;
4854
4855 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4856 connkeys = nl80211_parse_connkeys(rdev,
4857 info->attrs[NL80211_ATTR_KEYS]);
4858 if (IS_ERR(connkeys))
4859 return PTR_ERR(connkeys);
4860 }
4861
4862 ibss.control_port =
4863 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
4864
4865 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4866 if (err)
4867 kfree(connkeys);
4868 return err;
4869 }
4870
nl80211_leave_ibss(struct sk_buff * skb,struct genl_info * info)4871 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4872 {
4873 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4874 struct net_device *dev = info->user_ptr[1];
4875
4876 if (!rdev->ops->leave_ibss)
4877 return -EOPNOTSUPP;
4878
4879 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4880 return -EOPNOTSUPP;
4881
4882 return cfg80211_leave_ibss(rdev, dev, false);
4883 }
4884
4885 #ifdef CONFIG_NL80211_TESTMODE
4886 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4887 .name = "testmode",
4888 };
4889
nl80211_testmode_do(struct sk_buff * skb,struct genl_info * info)4890 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4891 {
4892 struct cfg80211_registered_device *rdev = info->user_ptr[0];
4893 int err;
4894
4895 if (!info->attrs[NL80211_ATTR_TESTDATA])
4896 return -EINVAL;
4897
4898 err = -EOPNOTSUPP;
4899 if (rdev->ops->testmode_cmd) {
4900 rdev->testmode_info = info;
4901 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4902 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4903 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4904 rdev->testmode_info = NULL;
4905 }
4906
4907 return err;
4908 }
4909
nl80211_testmode_dump(struct sk_buff * skb,struct netlink_callback * cb)4910 static int nl80211_testmode_dump(struct sk_buff *skb,
4911 struct netlink_callback *cb)
4912 {
4913 struct cfg80211_registered_device *rdev;
4914 int err;
4915 long phy_idx;
4916 void *data = NULL;
4917 int data_len = 0;
4918
4919 if (cb->args[0]) {
4920 /*
4921 * 0 is a valid index, but not valid for args[0],
4922 * so we need to offset by 1.
4923 */
4924 phy_idx = cb->args[0] - 1;
4925 } else {
4926 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
4927 nl80211_fam.attrbuf, nl80211_fam.maxattr,
4928 nl80211_policy);
4929 if (err)
4930 return err;
4931 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
4932 phy_idx = nla_get_u32(
4933 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
4934 } else {
4935 struct net_device *netdev;
4936
4937 err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
4938 nl80211_fam.attrbuf,
4939 &rdev, &netdev);
4940 if (err)
4941 return err;
4942 dev_put(netdev);
4943 phy_idx = rdev->wiphy_idx;
4944 cfg80211_unlock_rdev(rdev);
4945 }
4946 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
4947 cb->args[1] =
4948 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
4949 }
4950
4951 if (cb->args[1]) {
4952 data = nla_data((void *)cb->args[1]);
4953 data_len = nla_len((void *)cb->args[1]);
4954 }
4955
4956 mutex_lock(&cfg80211_mutex);
4957 rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
4958 if (!rdev) {
4959 mutex_unlock(&cfg80211_mutex);
4960 return -ENOENT;
4961 }
4962 cfg80211_lock_rdev(rdev);
4963 mutex_unlock(&cfg80211_mutex);
4964
4965 if (!rdev->ops->testmode_dump) {
4966 err = -EOPNOTSUPP;
4967 goto out_err;
4968 }
4969
4970 while (1) {
4971 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
4972 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4973 NL80211_CMD_TESTMODE);
4974 struct nlattr *tmdata;
4975
4976 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx) < 0) {
4977 genlmsg_cancel(skb, hdr);
4978 break;
4979 }
4980
4981 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4982 if (!tmdata) {
4983 genlmsg_cancel(skb, hdr);
4984 break;
4985 }
4986 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
4987 data, data_len);
4988 nla_nest_end(skb, tmdata);
4989
4990 if (err == -ENOBUFS || err == -ENOENT) {
4991 genlmsg_cancel(skb, hdr);
4992 break;
4993 } else if (err) {
4994 genlmsg_cancel(skb, hdr);
4995 goto out_err;
4996 }
4997
4998 genlmsg_end(skb, hdr);
4999 }
5000
5001 err = skb->len;
5002 /* see above */
5003 cb->args[0] = phy_idx + 1;
5004 out_err:
5005 cfg80211_unlock_rdev(rdev);
5006 return err;
5007 }
5008
5009 static struct sk_buff *
__cfg80211_testmode_alloc_skb(struct cfg80211_registered_device * rdev,int approxlen,u32 pid,u32 seq,gfp_t gfp)5010 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5011 int approxlen, u32 pid, u32 seq, gfp_t gfp)
5012 {
5013 struct sk_buff *skb;
5014 void *hdr;
5015 struct nlattr *data;
5016
5017 skb = nlmsg_new(approxlen + 100, gfp);
5018 if (!skb)
5019 return NULL;
5020
5021 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5022 if (!hdr) {
5023 kfree_skb(skb);
5024 return NULL;
5025 }
5026
5027 NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5028 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5029
5030 ((void **)skb->cb)[0] = rdev;
5031 ((void **)skb->cb)[1] = hdr;
5032 ((void **)skb->cb)[2] = data;
5033
5034 return skb;
5035
5036 nla_put_failure:
5037 kfree_skb(skb);
5038 return NULL;
5039 }
5040
cfg80211_testmode_alloc_reply_skb(struct wiphy * wiphy,int approxlen)5041 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5042 int approxlen)
5043 {
5044 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5045
5046 if (WARN_ON(!rdev->testmode_info))
5047 return NULL;
5048
5049 return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5050 rdev->testmode_info->snd_pid,
5051 rdev->testmode_info->snd_seq,
5052 GFP_KERNEL);
5053 }
5054 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5055
cfg80211_testmode_reply(struct sk_buff * skb)5056 int cfg80211_testmode_reply(struct sk_buff *skb)
5057 {
5058 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5059 void *hdr = ((void **)skb->cb)[1];
5060 struct nlattr *data = ((void **)skb->cb)[2];
5061
5062 if (WARN_ON(!rdev->testmode_info)) {
5063 kfree_skb(skb);
5064 return -EINVAL;
5065 }
5066
5067 nla_nest_end(skb, data);
5068 genlmsg_end(skb, hdr);
5069 return genlmsg_reply(skb, rdev->testmode_info);
5070 }
5071 EXPORT_SYMBOL(cfg80211_testmode_reply);
5072
cfg80211_testmode_alloc_event_skb(struct wiphy * wiphy,int approxlen,gfp_t gfp)5073 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5074 int approxlen, gfp_t gfp)
5075 {
5076 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5077
5078 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5079 }
5080 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5081
cfg80211_testmode_event(struct sk_buff * skb,gfp_t gfp)5082 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5083 {
5084 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5085 void *hdr = ((void **)skb->cb)[1];
5086 struct nlattr *data = ((void **)skb->cb)[2];
5087
5088 nla_nest_end(skb, data);
5089 genlmsg_end(skb, hdr);
5090 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), skb, 0,
5091 nl80211_testmode_mcgrp.id, gfp);
5092 }
5093 EXPORT_SYMBOL(cfg80211_testmode_event);
5094 #endif
5095
nl80211_connect(struct sk_buff * skb,struct genl_info * info)5096 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5097 {
5098 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5099 struct net_device *dev = info->user_ptr[1];
5100 struct cfg80211_connect_params connect;
5101 struct wiphy *wiphy;
5102 struct cfg80211_cached_keys *connkeys = NULL;
5103 int err;
5104
5105 memset(&connect, 0, sizeof(connect));
5106
5107 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5108 return -EINVAL;
5109
5110 if (!info->attrs[NL80211_ATTR_SSID] ||
5111 !nla_len(info->attrs[NL80211_ATTR_SSID]))
5112 return -EINVAL;
5113
5114 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5115 connect.auth_type =
5116 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5117 if (!nl80211_valid_auth_type(connect.auth_type))
5118 return -EINVAL;
5119 } else
5120 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5121
5122 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5123
5124 err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5125 NL80211_MAX_NR_CIPHER_SUITES);
5126 if (err)
5127 return err;
5128
5129 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5130 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5131 return -EOPNOTSUPP;
5132
5133 wiphy = &rdev->wiphy;
5134
5135 connect.bg_scan_period = -1;
5136 if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5137 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5138 connect.bg_scan_period =
5139 nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5140 }
5141
5142 if (info->attrs[NL80211_ATTR_MAC])
5143 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5144 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5145 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5146
5147 if (info->attrs[NL80211_ATTR_IE]) {
5148 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5149 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5150 }
5151
5152 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5153 connect.channel =
5154 ieee80211_get_channel(wiphy,
5155 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5156 if (!connect.channel ||
5157 connect.channel->flags & IEEE80211_CHAN_DISABLED)
5158 return -EINVAL;
5159 }
5160
5161 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5162 connkeys = nl80211_parse_connkeys(rdev,
5163 info->attrs[NL80211_ATTR_KEYS]);
5164 if (IS_ERR(connkeys))
5165 return PTR_ERR(connkeys);
5166 }
5167
5168 if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5169 connect.flags |= ASSOC_REQ_DISABLE_HT;
5170
5171 if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5172 memcpy(&connect.ht_capa_mask,
5173 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5174 sizeof(connect.ht_capa_mask));
5175
5176 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5177 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5178 return -EINVAL;
5179 memcpy(&connect.ht_capa,
5180 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5181 sizeof(connect.ht_capa));
5182 }
5183
5184 err = cfg80211_connect(rdev, dev, &connect, connkeys);
5185 if (err)
5186 kfree(connkeys);
5187 return err;
5188 }
5189
nl80211_disconnect(struct sk_buff * skb,struct genl_info * info)5190 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5191 {
5192 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5193 struct net_device *dev = info->user_ptr[1];
5194 u16 reason;
5195
5196 if (!info->attrs[NL80211_ATTR_REASON_CODE])
5197 reason = WLAN_REASON_DEAUTH_LEAVING;
5198 else
5199 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5200
5201 if (reason == 0)
5202 return -EINVAL;
5203
5204 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5205 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5206 return -EOPNOTSUPP;
5207
5208 return cfg80211_disconnect(rdev, dev, reason, true);
5209 }
5210
nl80211_wiphy_netns(struct sk_buff * skb,struct genl_info * info)5211 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5212 {
5213 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5214 struct net *net;
5215 int err;
5216 u32 pid;
5217
5218 if (!info->attrs[NL80211_ATTR_PID])
5219 return -EINVAL;
5220
5221 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5222
5223 net = get_net_ns_by_pid(pid);
5224 if (IS_ERR(net))
5225 return PTR_ERR(net);
5226
5227 err = 0;
5228
5229 /* check if anything to do */
5230 if (!net_eq(wiphy_net(&rdev->wiphy), net))
5231 err = cfg80211_switch_netns(rdev, net);
5232
5233 put_net(net);
5234 return err;
5235 }
5236
nl80211_setdel_pmksa(struct sk_buff * skb,struct genl_info * info)5237 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5238 {
5239 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5240 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5241 struct cfg80211_pmksa *pmksa) = NULL;
5242 struct net_device *dev = info->user_ptr[1];
5243 struct cfg80211_pmksa pmksa;
5244
5245 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5246
5247 if (!info->attrs[NL80211_ATTR_MAC])
5248 return -EINVAL;
5249
5250 if (!info->attrs[NL80211_ATTR_PMKID])
5251 return -EINVAL;
5252
5253 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5254 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5255
5256 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5257 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5258 return -EOPNOTSUPP;
5259
5260 switch (info->genlhdr->cmd) {
5261 case NL80211_CMD_SET_PMKSA:
5262 rdev_ops = rdev->ops->set_pmksa;
5263 break;
5264 case NL80211_CMD_DEL_PMKSA:
5265 rdev_ops = rdev->ops->del_pmksa;
5266 break;
5267 default:
5268 WARN_ON(1);
5269 break;
5270 }
5271
5272 if (!rdev_ops)
5273 return -EOPNOTSUPP;
5274
5275 return rdev_ops(&rdev->wiphy, dev, &pmksa);
5276 }
5277
nl80211_flush_pmksa(struct sk_buff * skb,struct genl_info * info)5278 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5279 {
5280 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5281 struct net_device *dev = info->user_ptr[1];
5282
5283 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5284 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5285 return -EOPNOTSUPP;
5286
5287 if (!rdev->ops->flush_pmksa)
5288 return -EOPNOTSUPP;
5289
5290 return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5291 }
5292
nl80211_tdls_mgmt(struct sk_buff * skb,struct genl_info * info)5293 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5294 {
5295 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5296 struct net_device *dev = info->user_ptr[1];
5297 u8 action_code, dialog_token;
5298 u16 status_code;
5299 u8 *peer;
5300
5301 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5302 !rdev->ops->tdls_mgmt)
5303 return -EOPNOTSUPP;
5304
5305 if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5306 !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5307 !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5308 !info->attrs[NL80211_ATTR_IE] ||
5309 !info->attrs[NL80211_ATTR_MAC])
5310 return -EINVAL;
5311
5312 peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5313 action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5314 status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5315 dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5316
5317 return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5318 dialog_token, status_code,
5319 nla_data(info->attrs[NL80211_ATTR_IE]),
5320 nla_len(info->attrs[NL80211_ATTR_IE]));
5321 }
5322
nl80211_tdls_oper(struct sk_buff * skb,struct genl_info * info)5323 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5324 {
5325 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5326 struct net_device *dev = info->user_ptr[1];
5327 enum nl80211_tdls_operation operation;
5328 u8 *peer;
5329
5330 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5331 !rdev->ops->tdls_oper)
5332 return -EOPNOTSUPP;
5333
5334 if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5335 !info->attrs[NL80211_ATTR_MAC])
5336 return -EINVAL;
5337
5338 operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5339 peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5340
5341 return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5342 }
5343
nl80211_remain_on_channel(struct sk_buff * skb,struct genl_info * info)5344 static int nl80211_remain_on_channel(struct sk_buff *skb,
5345 struct genl_info *info)
5346 {
5347 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5348 struct net_device *dev = info->user_ptr[1];
5349 struct ieee80211_channel *chan;
5350 struct sk_buff *msg;
5351 void *hdr;
5352 u64 cookie;
5353 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5354 u32 freq, duration;
5355 int err;
5356
5357 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5358 !info->attrs[NL80211_ATTR_DURATION])
5359 return -EINVAL;
5360
5361 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5362
5363 /*
5364 * We should be on that channel for at least one jiffie,
5365 * and more than 5 seconds seems excessive.
5366 */
5367 if (!duration || !msecs_to_jiffies(duration) ||
5368 duration > rdev->wiphy.max_remain_on_channel_duration)
5369 return -EINVAL;
5370
5371 if (!rdev->ops->remain_on_channel ||
5372 !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5373 return -EOPNOTSUPP;
5374
5375 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5376 channel_type = nla_get_u32(
5377 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5378 if (channel_type != NL80211_CHAN_NO_HT &&
5379 channel_type != NL80211_CHAN_HT20 &&
5380 channel_type != NL80211_CHAN_HT40PLUS &&
5381 channel_type != NL80211_CHAN_HT40MINUS)
5382 return -EINVAL;
5383 }
5384
5385 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5386 chan = rdev_freq_to_chan(rdev, freq, channel_type);
5387 if (chan == NULL)
5388 return -EINVAL;
5389
5390 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5391 if (!msg)
5392 return -ENOMEM;
5393
5394 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5395 NL80211_CMD_REMAIN_ON_CHANNEL);
5396
5397 if (IS_ERR(hdr)) {
5398 err = PTR_ERR(hdr);
5399 goto free_msg;
5400 }
5401
5402 err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5403 channel_type, duration, &cookie);
5404
5405 if (err)
5406 goto free_msg;
5407
5408 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5409
5410 genlmsg_end(msg, hdr);
5411
5412 return genlmsg_reply(msg, info);
5413
5414 nla_put_failure:
5415 err = -ENOBUFS;
5416 free_msg:
5417 nlmsg_free(msg);
5418 return err;
5419 }
5420
nl80211_cancel_remain_on_channel(struct sk_buff * skb,struct genl_info * info)5421 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5422 struct genl_info *info)
5423 {
5424 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5425 struct net_device *dev = info->user_ptr[1];
5426 u64 cookie;
5427
5428 if (!info->attrs[NL80211_ATTR_COOKIE])
5429 return -EINVAL;
5430
5431 if (!rdev->ops->cancel_remain_on_channel)
5432 return -EOPNOTSUPP;
5433
5434 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5435
5436 return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5437 }
5438
rateset_to_mask(struct ieee80211_supported_band * sband,u8 * rates,u8 rates_len)5439 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5440 u8 *rates, u8 rates_len)
5441 {
5442 u8 i;
5443 u32 mask = 0;
5444
5445 for (i = 0; i < rates_len; i++) {
5446 int rate = (rates[i] & 0x7f) * 5;
5447 int ridx;
5448 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5449 struct ieee80211_rate *srate =
5450 &sband->bitrates[ridx];
5451 if (rate == srate->bitrate) {
5452 mask |= 1 << ridx;
5453 break;
5454 }
5455 }
5456 if (ridx == sband->n_bitrates)
5457 return 0; /* rate not found */
5458 }
5459
5460 return mask;
5461 }
5462
ht_rateset_to_mask(struct ieee80211_supported_band * sband,u8 * rates,u8 rates_len,u8 mcs[IEEE80211_HT_MCS_MASK_LEN])5463 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5464 u8 *rates, u8 rates_len,
5465 u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5466 {
5467 u8 i;
5468
5469 memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5470
5471 for (i = 0; i < rates_len; i++) {
5472 int ridx, rbit;
5473
5474 ridx = rates[i] / 8;
5475 rbit = BIT(rates[i] % 8);
5476
5477 /* check validity */
5478 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5479 return false;
5480
5481 /* check availability */
5482 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5483 mcs[ridx] |= rbit;
5484 else
5485 return false;
5486 }
5487
5488 return true;
5489 }
5490
5491 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5492 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5493 .len = NL80211_MAX_SUPP_RATES },
5494 [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5495 .len = NL80211_MAX_SUPP_HT_RATES },
5496 };
5497
nl80211_set_tx_bitrate_mask(struct sk_buff * skb,struct genl_info * info)5498 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5499 struct genl_info *info)
5500 {
5501 struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5502 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5503 struct cfg80211_bitrate_mask mask;
5504 int rem, i;
5505 struct net_device *dev = info->user_ptr[1];
5506 struct nlattr *tx_rates;
5507 struct ieee80211_supported_band *sband;
5508
5509 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5510 return -EINVAL;
5511
5512 if (!rdev->ops->set_bitrate_mask)
5513 return -EOPNOTSUPP;
5514
5515 memset(&mask, 0, sizeof(mask));
5516 /* Default to all rates enabled */
5517 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5518 sband = rdev->wiphy.bands[i];
5519 mask.control[i].legacy =
5520 sband ? (1 << sband->n_bitrates) - 1 : 0;
5521 if (sband)
5522 memcpy(mask.control[i].mcs,
5523 sband->ht_cap.mcs.rx_mask,
5524 sizeof(mask.control[i].mcs));
5525 else
5526 memset(mask.control[i].mcs, 0,
5527 sizeof(mask.control[i].mcs));
5528 }
5529
5530 /*
5531 * The nested attribute uses enum nl80211_band as the index. This maps
5532 * directly to the enum ieee80211_band values used in cfg80211.
5533 */
5534 BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5535 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5536 {
5537 enum ieee80211_band band = nla_type(tx_rates);
5538 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5539 return -EINVAL;
5540 sband = rdev->wiphy.bands[band];
5541 if (sband == NULL)
5542 return -EINVAL;
5543 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5544 nla_len(tx_rates), nl80211_txattr_policy);
5545 if (tb[NL80211_TXRATE_LEGACY]) {
5546 mask.control[band].legacy = rateset_to_mask(
5547 sband,
5548 nla_data(tb[NL80211_TXRATE_LEGACY]),
5549 nla_len(tb[NL80211_TXRATE_LEGACY]));
5550 }
5551 if (tb[NL80211_TXRATE_MCS]) {
5552 if (!ht_rateset_to_mask(
5553 sband,
5554 nla_data(tb[NL80211_TXRATE_MCS]),
5555 nla_len(tb[NL80211_TXRATE_MCS]),
5556 mask.control[band].mcs))
5557 return -EINVAL;
5558 }
5559
5560 if (mask.control[band].legacy == 0) {
5561 /* don't allow empty legacy rates if HT
5562 * is not even supported. */
5563 if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5564 return -EINVAL;
5565
5566 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5567 if (mask.control[band].mcs[i])
5568 break;
5569
5570 /* legacy and mcs rates may not be both empty */
5571 if (i == IEEE80211_HT_MCS_MASK_LEN)
5572 return -EINVAL;
5573 }
5574 }
5575
5576 return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5577 }
5578
nl80211_register_mgmt(struct sk_buff * skb,struct genl_info * info)5579 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5580 {
5581 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5582 struct net_device *dev = info->user_ptr[1];
5583 u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5584
5585 if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5586 return -EINVAL;
5587
5588 if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5589 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5590
5591 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5592 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5593 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5594 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5595 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5596 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5597 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5598 return -EOPNOTSUPP;
5599
5600 /* not much point in registering if we can't reply */
5601 if (!rdev->ops->mgmt_tx)
5602 return -EOPNOTSUPP;
5603
5604 return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5605 frame_type,
5606 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5607 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5608 }
5609
nl80211_tx_mgmt(struct sk_buff * skb,struct genl_info * info)5610 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5611 {
5612 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5613 struct net_device *dev = info->user_ptr[1];
5614 struct ieee80211_channel *chan;
5615 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5616 bool channel_type_valid = false;
5617 u32 freq;
5618 int err;
5619 void *hdr = NULL;
5620 u64 cookie;
5621 struct sk_buff *msg = NULL;
5622 unsigned int wait = 0;
5623 bool offchan, no_cck, dont_wait_for_ack;
5624
5625 dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5626
5627 if (!info->attrs[NL80211_ATTR_FRAME] ||
5628 !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5629 return -EINVAL;
5630
5631 if (!rdev->ops->mgmt_tx)
5632 return -EOPNOTSUPP;
5633
5634 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5635 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5636 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5637 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5638 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5639 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5640 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5641 return -EOPNOTSUPP;
5642
5643 if (info->attrs[NL80211_ATTR_DURATION]) {
5644 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5645 return -EINVAL;
5646 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5647 }
5648
5649 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5650 channel_type = nla_get_u32(
5651 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5652 if (channel_type != NL80211_CHAN_NO_HT &&
5653 channel_type != NL80211_CHAN_HT20 &&
5654 channel_type != NL80211_CHAN_HT40PLUS &&
5655 channel_type != NL80211_CHAN_HT40MINUS)
5656 return -EINVAL;
5657 channel_type_valid = true;
5658 }
5659
5660 offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5661
5662 if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5663 return -EINVAL;
5664
5665 no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5666
5667 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5668 chan = rdev_freq_to_chan(rdev, freq, channel_type);
5669 if (chan == NULL)
5670 return -EINVAL;
5671
5672 if (!dont_wait_for_ack) {
5673 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5674 if (!msg)
5675 return -ENOMEM;
5676
5677 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5678 NL80211_CMD_FRAME);
5679
5680 if (IS_ERR(hdr)) {
5681 err = PTR_ERR(hdr);
5682 goto free_msg;
5683 }
5684 }
5685
5686 err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5687 channel_type_valid, wait,
5688 nla_data(info->attrs[NL80211_ATTR_FRAME]),
5689 nla_len(info->attrs[NL80211_ATTR_FRAME]),
5690 no_cck, dont_wait_for_ack, &cookie);
5691 if (err)
5692 goto free_msg;
5693
5694 if (msg) {
5695 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5696
5697 genlmsg_end(msg, hdr);
5698 return genlmsg_reply(msg, info);
5699 }
5700
5701 return 0;
5702
5703 nla_put_failure:
5704 err = -ENOBUFS;
5705 free_msg:
5706 nlmsg_free(msg);
5707 return err;
5708 }
5709
nl80211_tx_mgmt_cancel_wait(struct sk_buff * skb,struct genl_info * info)5710 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5711 {
5712 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5713 struct net_device *dev = info->user_ptr[1];
5714 u64 cookie;
5715
5716 if (!info->attrs[NL80211_ATTR_COOKIE])
5717 return -EINVAL;
5718
5719 if (!rdev->ops->mgmt_tx_cancel_wait)
5720 return -EOPNOTSUPP;
5721
5722 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5723 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5724 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5725 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5726 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5727 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5728 return -EOPNOTSUPP;
5729
5730 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5731
5732 return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5733 }
5734
nl80211_set_power_save(struct sk_buff * skb,struct genl_info * info)5735 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5736 {
5737 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5738 struct wireless_dev *wdev;
5739 struct net_device *dev = info->user_ptr[1];
5740 u8 ps_state;
5741 bool state;
5742 int err;
5743
5744 if (!info->attrs[NL80211_ATTR_PS_STATE])
5745 return -EINVAL;
5746
5747 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5748
5749 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5750 return -EINVAL;
5751
5752 wdev = dev->ieee80211_ptr;
5753
5754 if (!rdev->ops->set_power_mgmt)
5755 return -EOPNOTSUPP;
5756
5757 state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5758
5759 if (state == wdev->ps)
5760 return 0;
5761
5762 err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5763 wdev->ps_timeout);
5764 if (!err)
5765 wdev->ps = state;
5766 return err;
5767 }
5768
nl80211_get_power_save(struct sk_buff * skb,struct genl_info * info)5769 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5770 {
5771 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5772 enum nl80211_ps_state ps_state;
5773 struct wireless_dev *wdev;
5774 struct net_device *dev = info->user_ptr[1];
5775 struct sk_buff *msg;
5776 void *hdr;
5777 int err;
5778
5779 wdev = dev->ieee80211_ptr;
5780
5781 if (!rdev->ops->set_power_mgmt)
5782 return -EOPNOTSUPP;
5783
5784 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5785 if (!msg)
5786 return -ENOMEM;
5787
5788 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5789 NL80211_CMD_GET_POWER_SAVE);
5790 if (!hdr) {
5791 err = -ENOBUFS;
5792 goto free_msg;
5793 }
5794
5795 if (wdev->ps)
5796 ps_state = NL80211_PS_ENABLED;
5797 else
5798 ps_state = NL80211_PS_DISABLED;
5799
5800 NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5801
5802 genlmsg_end(msg, hdr);
5803 return genlmsg_reply(msg, info);
5804
5805 nla_put_failure:
5806 err = -ENOBUFS;
5807 free_msg:
5808 nlmsg_free(msg);
5809 return err;
5810 }
5811
5812 static struct nla_policy
5813 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5814 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5815 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5816 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5817 };
5818
nl80211_set_cqm_rssi(struct genl_info * info,s32 threshold,u32 hysteresis)5819 static int nl80211_set_cqm_rssi(struct genl_info *info,
5820 s32 threshold, u32 hysteresis)
5821 {
5822 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5823 struct wireless_dev *wdev;
5824 struct net_device *dev = info->user_ptr[1];
5825
5826 if (threshold > 0)
5827 return -EINVAL;
5828
5829 wdev = dev->ieee80211_ptr;
5830
5831 if (!rdev->ops->set_cqm_rssi_config)
5832 return -EOPNOTSUPP;
5833
5834 if (wdev->iftype != NL80211_IFTYPE_STATION &&
5835 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5836 return -EOPNOTSUPP;
5837
5838 return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5839 threshold, hysteresis);
5840 }
5841
nl80211_set_cqm(struct sk_buff * skb,struct genl_info * info)5842 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5843 {
5844 struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5845 struct nlattr *cqm;
5846 int err;
5847
5848 cqm = info->attrs[NL80211_ATTR_CQM];
5849 if (!cqm) {
5850 err = -EINVAL;
5851 goto out;
5852 }
5853
5854 err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5855 nl80211_attr_cqm_policy);
5856 if (err)
5857 goto out;
5858
5859 if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5860 attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5861 s32 threshold;
5862 u32 hysteresis;
5863 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5864 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5865 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5866 } else
5867 err = -EINVAL;
5868
5869 out:
5870 return err;
5871 }
5872
nl80211_join_mesh(struct sk_buff * skb,struct genl_info * info)5873 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5874 {
5875 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5876 struct net_device *dev = info->user_ptr[1];
5877 struct mesh_config cfg;
5878 struct mesh_setup setup;
5879 int err;
5880
5881 /* start with default */
5882 memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5883 memcpy(&setup, &default_mesh_setup, sizeof(setup));
5884
5885 if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5886 /* and parse parameters if given */
5887 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5888 if (err)
5889 return err;
5890 }
5891
5892 if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5893 !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5894 return -EINVAL;
5895
5896 setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5897 setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5898
5899 if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5900 !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
5901 nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5902 return -EINVAL;
5903
5904 if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5905 /* parse additional setup parameters if given */
5906 err = nl80211_parse_mesh_setup(info, &setup);
5907 if (err)
5908 return err;
5909 }
5910
5911 return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5912 }
5913
nl80211_leave_mesh(struct sk_buff * skb,struct genl_info * info)5914 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5915 {
5916 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5917 struct net_device *dev = info->user_ptr[1];
5918
5919 return cfg80211_leave_mesh(rdev, dev);
5920 }
5921
nl80211_get_wowlan(struct sk_buff * skb,struct genl_info * info)5922 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5923 {
5924 struct cfg80211_registered_device *rdev = info->user_ptr[0];
5925 struct sk_buff *msg;
5926 void *hdr;
5927
5928 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5929 return -EOPNOTSUPP;
5930
5931 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5932 if (!msg)
5933 return -ENOMEM;
5934
5935 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5936 NL80211_CMD_GET_WOWLAN);
5937 if (!hdr)
5938 goto nla_put_failure;
5939
5940 if (rdev->wowlan) {
5941 struct nlattr *nl_wowlan;
5942
5943 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5944 if (!nl_wowlan)
5945 goto nla_put_failure;
5946
5947 if (rdev->wowlan->any)
5948 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5949 if (rdev->wowlan->disconnect)
5950 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5951 if (rdev->wowlan->magic_pkt)
5952 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5953 if (rdev->wowlan->gtk_rekey_failure)
5954 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
5955 if (rdev->wowlan->eap_identity_req)
5956 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
5957 if (rdev->wowlan->four_way_handshake)
5958 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
5959 if (rdev->wowlan->rfkill_release)
5960 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
5961 if (rdev->wowlan->n_patterns) {
5962 struct nlattr *nl_pats, *nl_pat;
5963 int i, pat_len;
5964
5965 nl_pats = nla_nest_start(msg,
5966 NL80211_WOWLAN_TRIG_PKT_PATTERN);
5967 if (!nl_pats)
5968 goto nla_put_failure;
5969
5970 for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5971 nl_pat = nla_nest_start(msg, i + 1);
5972 if (!nl_pat)
5973 goto nla_put_failure;
5974 pat_len = rdev->wowlan->patterns[i].pattern_len;
5975 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5976 DIV_ROUND_UP(pat_len, 8),
5977 rdev->wowlan->patterns[i].mask);
5978 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5979 pat_len,
5980 rdev->wowlan->patterns[i].pattern);
5981 nla_nest_end(msg, nl_pat);
5982 }
5983 nla_nest_end(msg, nl_pats);
5984 }
5985
5986 nla_nest_end(msg, nl_wowlan);
5987 }
5988
5989 genlmsg_end(msg, hdr);
5990 return genlmsg_reply(msg, info);
5991
5992 nla_put_failure:
5993 nlmsg_free(msg);
5994 return -ENOBUFS;
5995 }
5996
nl80211_set_wowlan(struct sk_buff * skb,struct genl_info * info)5997 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5998 {
5999 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6000 struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6001 struct cfg80211_wowlan no_triggers = {};
6002 struct cfg80211_wowlan new_triggers = {};
6003 struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6004 int err, i;
6005
6006 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6007 return -EOPNOTSUPP;
6008
6009 if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6010 goto no_triggers;
6011
6012 err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6013 nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6014 nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6015 nl80211_wowlan_policy);
6016 if (err)
6017 return err;
6018
6019 if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6020 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6021 return -EINVAL;
6022 new_triggers.any = true;
6023 }
6024
6025 if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6026 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6027 return -EINVAL;
6028 new_triggers.disconnect = true;
6029 }
6030
6031 if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6032 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6033 return -EINVAL;
6034 new_triggers.magic_pkt = true;
6035 }
6036
6037 if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6038 return -EINVAL;
6039
6040 if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6041 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6042 return -EINVAL;
6043 new_triggers.gtk_rekey_failure = true;
6044 }
6045
6046 if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6047 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6048 return -EINVAL;
6049 new_triggers.eap_identity_req = true;
6050 }
6051
6052 if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6053 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6054 return -EINVAL;
6055 new_triggers.four_way_handshake = true;
6056 }
6057
6058 if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6059 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6060 return -EINVAL;
6061 new_triggers.rfkill_release = true;
6062 }
6063
6064 if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6065 struct nlattr *pat;
6066 int n_patterns = 0;
6067 int rem, pat_len, mask_len;
6068 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6069
6070 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6071 rem)
6072 n_patterns++;
6073 if (n_patterns > wowlan->n_patterns)
6074 return -EINVAL;
6075
6076 new_triggers.patterns = kcalloc(n_patterns,
6077 sizeof(new_triggers.patterns[0]),
6078 GFP_KERNEL);
6079 if (!new_triggers.patterns)
6080 return -ENOMEM;
6081
6082 new_triggers.n_patterns = n_patterns;
6083 i = 0;
6084
6085 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6086 rem) {
6087 nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6088 nla_data(pat), nla_len(pat), NULL);
6089 err = -EINVAL;
6090 if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6091 !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6092 goto error;
6093 pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6094 mask_len = DIV_ROUND_UP(pat_len, 8);
6095 if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6096 mask_len)
6097 goto error;
6098 if (pat_len > wowlan->pattern_max_len ||
6099 pat_len < wowlan->pattern_min_len)
6100 goto error;
6101
6102 new_triggers.patterns[i].mask =
6103 kmalloc(mask_len + pat_len, GFP_KERNEL);
6104 if (!new_triggers.patterns[i].mask) {
6105 err = -ENOMEM;
6106 goto error;
6107 }
6108 new_triggers.patterns[i].pattern =
6109 new_triggers.patterns[i].mask + mask_len;
6110 memcpy(new_triggers.patterns[i].mask,
6111 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6112 mask_len);
6113 new_triggers.patterns[i].pattern_len = pat_len;
6114 memcpy(new_triggers.patterns[i].pattern,
6115 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6116 pat_len);
6117 i++;
6118 }
6119 }
6120
6121 if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6122 struct cfg80211_wowlan *ntrig;
6123 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6124 GFP_KERNEL);
6125 if (!ntrig) {
6126 err = -ENOMEM;
6127 goto error;
6128 }
6129 cfg80211_rdev_free_wowlan(rdev);
6130 rdev->wowlan = ntrig;
6131 } else {
6132 no_triggers:
6133 cfg80211_rdev_free_wowlan(rdev);
6134 rdev->wowlan = NULL;
6135 }
6136
6137 return 0;
6138 error:
6139 for (i = 0; i < new_triggers.n_patterns; i++)
6140 kfree(new_triggers.patterns[i].mask);
6141 kfree(new_triggers.patterns);
6142 return err;
6143 }
6144
nl80211_set_rekey_data(struct sk_buff * skb,struct genl_info * info)6145 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6146 {
6147 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6148 struct net_device *dev = info->user_ptr[1];
6149 struct wireless_dev *wdev = dev->ieee80211_ptr;
6150 struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6151 struct cfg80211_gtk_rekey_data rekey_data;
6152 int err;
6153
6154 if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6155 return -EINVAL;
6156
6157 err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6158 nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6159 nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6160 nl80211_rekey_policy);
6161 if (err)
6162 return err;
6163
6164 if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6165 return -ERANGE;
6166 if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6167 return -ERANGE;
6168 if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6169 return -ERANGE;
6170
6171 memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6172 NL80211_KEK_LEN);
6173 memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6174 NL80211_KCK_LEN);
6175 memcpy(rekey_data.replay_ctr,
6176 nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6177 NL80211_REPLAY_CTR_LEN);
6178
6179 wdev_lock(wdev);
6180 if (!wdev->current_bss) {
6181 err = -ENOTCONN;
6182 goto out;
6183 }
6184
6185 if (!rdev->ops->set_rekey_data) {
6186 err = -EOPNOTSUPP;
6187 goto out;
6188 }
6189
6190 err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6191 out:
6192 wdev_unlock(wdev);
6193 return err;
6194 }
6195
nl80211_register_unexpected_frame(struct sk_buff * skb,struct genl_info * info)6196 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6197 struct genl_info *info)
6198 {
6199 struct net_device *dev = info->user_ptr[1];
6200 struct wireless_dev *wdev = dev->ieee80211_ptr;
6201
6202 if (wdev->iftype != NL80211_IFTYPE_AP &&
6203 wdev->iftype != NL80211_IFTYPE_P2P_GO)
6204 return -EINVAL;
6205
6206 if (wdev->ap_unexpected_nlpid)
6207 return -EBUSY;
6208
6209 wdev->ap_unexpected_nlpid = info->snd_pid;
6210 return 0;
6211 }
6212
nl80211_probe_client(struct sk_buff * skb,struct genl_info * info)6213 static int nl80211_probe_client(struct sk_buff *skb,
6214 struct genl_info *info)
6215 {
6216 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6217 struct net_device *dev = info->user_ptr[1];
6218 struct wireless_dev *wdev = dev->ieee80211_ptr;
6219 struct sk_buff *msg;
6220 void *hdr;
6221 const u8 *addr;
6222 u64 cookie;
6223 int err;
6224
6225 if (wdev->iftype != NL80211_IFTYPE_AP &&
6226 wdev->iftype != NL80211_IFTYPE_P2P_GO)
6227 return -EOPNOTSUPP;
6228
6229 if (!info->attrs[NL80211_ATTR_MAC])
6230 return -EINVAL;
6231
6232 if (!rdev->ops->probe_client)
6233 return -EOPNOTSUPP;
6234
6235 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6236 if (!msg)
6237 return -ENOMEM;
6238
6239 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6240 NL80211_CMD_PROBE_CLIENT);
6241
6242 if (IS_ERR(hdr)) {
6243 err = PTR_ERR(hdr);
6244 goto free_msg;
6245 }
6246
6247 addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6248
6249 err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6250 if (err)
6251 goto free_msg;
6252
6253 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6254
6255 genlmsg_end(msg, hdr);
6256
6257 return genlmsg_reply(msg, info);
6258
6259 nla_put_failure:
6260 err = -ENOBUFS;
6261 free_msg:
6262 nlmsg_free(msg);
6263 return err;
6264 }
6265
nl80211_register_beacons(struct sk_buff * skb,struct genl_info * info)6266 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6267 {
6268 struct cfg80211_registered_device *rdev = info->user_ptr[0];
6269
6270 if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6271 return -EOPNOTSUPP;
6272
6273 if (rdev->ap_beacons_nlpid)
6274 return -EBUSY;
6275
6276 rdev->ap_beacons_nlpid = info->snd_pid;
6277
6278 return 0;
6279 }
6280
6281 #define NL80211_FLAG_NEED_WIPHY 0x01
6282 #define NL80211_FLAG_NEED_NETDEV 0x02
6283 #define NL80211_FLAG_NEED_RTNL 0x04
6284 #define NL80211_FLAG_CHECK_NETDEV_UP 0x08
6285 #define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\
6286 NL80211_FLAG_CHECK_NETDEV_UP)
6287
nl80211_pre_doit(struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)6288 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6289 struct genl_info *info)
6290 {
6291 struct cfg80211_registered_device *rdev;
6292 struct net_device *dev;
6293 int err;
6294 bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6295
6296 if (rtnl)
6297 rtnl_lock();
6298
6299 if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6300 rdev = cfg80211_get_dev_from_info(info);
6301 if (IS_ERR(rdev)) {
6302 if (rtnl)
6303 rtnl_unlock();
6304 return PTR_ERR(rdev);
6305 }
6306 info->user_ptr[0] = rdev;
6307 } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6308 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6309 &rdev, &dev);
6310 if (err) {
6311 if (rtnl)
6312 rtnl_unlock();
6313 return err;
6314 }
6315 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6316 !netif_running(dev)) {
6317 cfg80211_unlock_rdev(rdev);
6318 dev_put(dev);
6319 if (rtnl)
6320 rtnl_unlock();
6321 return -ENETDOWN;
6322 }
6323 info->user_ptr[0] = rdev;
6324 info->user_ptr[1] = dev;
6325 }
6326
6327 return 0;
6328 }
6329
nl80211_post_doit(struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)6330 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6331 struct genl_info *info)
6332 {
6333 if (info->user_ptr[0])
6334 cfg80211_unlock_rdev(info->user_ptr[0]);
6335 if (info->user_ptr[1])
6336 dev_put(info->user_ptr[1]);
6337 if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6338 rtnl_unlock();
6339 }
6340
6341 static struct genl_ops nl80211_ops[] = {
6342 {
6343 .cmd = NL80211_CMD_GET_WIPHY,
6344 .doit = nl80211_get_wiphy,
6345 .dumpit = nl80211_dump_wiphy,
6346 .policy = nl80211_policy,
6347 /* can be retrieved by unprivileged users */
6348 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6349 },
6350 {
6351 .cmd = NL80211_CMD_SET_WIPHY,
6352 .doit = nl80211_set_wiphy,
6353 .policy = nl80211_policy,
6354 .flags = GENL_ADMIN_PERM,
6355 .internal_flags = NL80211_FLAG_NEED_RTNL,
6356 },
6357 {
6358 .cmd = NL80211_CMD_GET_INTERFACE,
6359 .doit = nl80211_get_interface,
6360 .dumpit = nl80211_dump_interface,
6361 .policy = nl80211_policy,
6362 /* can be retrieved by unprivileged users */
6363 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6364 },
6365 {
6366 .cmd = NL80211_CMD_SET_INTERFACE,
6367 .doit = nl80211_set_interface,
6368 .policy = nl80211_policy,
6369 .flags = GENL_ADMIN_PERM,
6370 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6371 NL80211_FLAG_NEED_RTNL,
6372 },
6373 {
6374 .cmd = NL80211_CMD_NEW_INTERFACE,
6375 .doit = nl80211_new_interface,
6376 .policy = nl80211_policy,
6377 .flags = GENL_ADMIN_PERM,
6378 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6379 NL80211_FLAG_NEED_RTNL,
6380 },
6381 {
6382 .cmd = NL80211_CMD_DEL_INTERFACE,
6383 .doit = nl80211_del_interface,
6384 .policy = nl80211_policy,
6385 .flags = GENL_ADMIN_PERM,
6386 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6387 NL80211_FLAG_NEED_RTNL,
6388 },
6389 {
6390 .cmd = NL80211_CMD_GET_KEY,
6391 .doit = nl80211_get_key,
6392 .policy = nl80211_policy,
6393 .flags = GENL_ADMIN_PERM,
6394 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6395 NL80211_FLAG_NEED_RTNL,
6396 },
6397 {
6398 .cmd = NL80211_CMD_SET_KEY,
6399 .doit = nl80211_set_key,
6400 .policy = nl80211_policy,
6401 .flags = GENL_ADMIN_PERM,
6402 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6403 NL80211_FLAG_NEED_RTNL,
6404 },
6405 {
6406 .cmd = NL80211_CMD_NEW_KEY,
6407 .doit = nl80211_new_key,
6408 .policy = nl80211_policy,
6409 .flags = GENL_ADMIN_PERM,
6410 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6411 NL80211_FLAG_NEED_RTNL,
6412 },
6413 {
6414 .cmd = NL80211_CMD_DEL_KEY,
6415 .doit = nl80211_del_key,
6416 .policy = nl80211_policy,
6417 .flags = GENL_ADMIN_PERM,
6418 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6419 NL80211_FLAG_NEED_RTNL,
6420 },
6421 {
6422 .cmd = NL80211_CMD_SET_BEACON,
6423 .policy = nl80211_policy,
6424 .flags = GENL_ADMIN_PERM,
6425 .doit = nl80211_set_beacon,
6426 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6427 NL80211_FLAG_NEED_RTNL,
6428 },
6429 {
6430 .cmd = NL80211_CMD_START_AP,
6431 .policy = nl80211_policy,
6432 .flags = GENL_ADMIN_PERM,
6433 .doit = nl80211_start_ap,
6434 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6435 NL80211_FLAG_NEED_RTNL,
6436 },
6437 {
6438 .cmd = NL80211_CMD_STOP_AP,
6439 .policy = nl80211_policy,
6440 .flags = GENL_ADMIN_PERM,
6441 .doit = nl80211_stop_ap,
6442 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6443 NL80211_FLAG_NEED_RTNL,
6444 },
6445 {
6446 .cmd = NL80211_CMD_GET_STATION,
6447 .doit = nl80211_get_station,
6448 .dumpit = nl80211_dump_station,
6449 .policy = nl80211_policy,
6450 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6451 NL80211_FLAG_NEED_RTNL,
6452 },
6453 {
6454 .cmd = NL80211_CMD_SET_STATION,
6455 .doit = nl80211_set_station,
6456 .policy = nl80211_policy,
6457 .flags = GENL_ADMIN_PERM,
6458 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6459 NL80211_FLAG_NEED_RTNL,
6460 },
6461 {
6462 .cmd = NL80211_CMD_NEW_STATION,
6463 .doit = nl80211_new_station,
6464 .policy = nl80211_policy,
6465 .flags = GENL_ADMIN_PERM,
6466 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6467 NL80211_FLAG_NEED_RTNL,
6468 },
6469 {
6470 .cmd = NL80211_CMD_DEL_STATION,
6471 .doit = nl80211_del_station,
6472 .policy = nl80211_policy,
6473 .flags = GENL_ADMIN_PERM,
6474 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6475 NL80211_FLAG_NEED_RTNL,
6476 },
6477 {
6478 .cmd = NL80211_CMD_GET_MPATH,
6479 .doit = nl80211_get_mpath,
6480 .dumpit = nl80211_dump_mpath,
6481 .policy = nl80211_policy,
6482 .flags = GENL_ADMIN_PERM,
6483 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6484 NL80211_FLAG_NEED_RTNL,
6485 },
6486 {
6487 .cmd = NL80211_CMD_SET_MPATH,
6488 .doit = nl80211_set_mpath,
6489 .policy = nl80211_policy,
6490 .flags = GENL_ADMIN_PERM,
6491 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6492 NL80211_FLAG_NEED_RTNL,
6493 },
6494 {
6495 .cmd = NL80211_CMD_NEW_MPATH,
6496 .doit = nl80211_new_mpath,
6497 .policy = nl80211_policy,
6498 .flags = GENL_ADMIN_PERM,
6499 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6500 NL80211_FLAG_NEED_RTNL,
6501 },
6502 {
6503 .cmd = NL80211_CMD_DEL_MPATH,
6504 .doit = nl80211_del_mpath,
6505 .policy = nl80211_policy,
6506 .flags = GENL_ADMIN_PERM,
6507 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6508 NL80211_FLAG_NEED_RTNL,
6509 },
6510 {
6511 .cmd = NL80211_CMD_SET_BSS,
6512 .doit = nl80211_set_bss,
6513 .policy = nl80211_policy,
6514 .flags = GENL_ADMIN_PERM,
6515 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6516 NL80211_FLAG_NEED_RTNL,
6517 },
6518 {
6519 .cmd = NL80211_CMD_GET_REG,
6520 .doit = nl80211_get_reg,
6521 .policy = nl80211_policy,
6522 /* can be retrieved by unprivileged users */
6523 },
6524 {
6525 .cmd = NL80211_CMD_SET_REG,
6526 .doit = nl80211_set_reg,
6527 .policy = nl80211_policy,
6528 .flags = GENL_ADMIN_PERM,
6529 },
6530 {
6531 .cmd = NL80211_CMD_REQ_SET_REG,
6532 .doit = nl80211_req_set_reg,
6533 .policy = nl80211_policy,
6534 .flags = GENL_ADMIN_PERM,
6535 },
6536 {
6537 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6538 .doit = nl80211_get_mesh_config,
6539 .policy = nl80211_policy,
6540 /* can be retrieved by unprivileged users */
6541 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6542 NL80211_FLAG_NEED_RTNL,
6543 },
6544 {
6545 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6546 .doit = nl80211_update_mesh_config,
6547 .policy = nl80211_policy,
6548 .flags = GENL_ADMIN_PERM,
6549 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6550 NL80211_FLAG_NEED_RTNL,
6551 },
6552 {
6553 .cmd = NL80211_CMD_TRIGGER_SCAN,
6554 .doit = nl80211_trigger_scan,
6555 .policy = nl80211_policy,
6556 .flags = GENL_ADMIN_PERM,
6557 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6558 NL80211_FLAG_NEED_RTNL,
6559 },
6560 {
6561 .cmd = NL80211_CMD_GET_SCAN,
6562 .policy = nl80211_policy,
6563 .dumpit = nl80211_dump_scan,
6564 },
6565 {
6566 .cmd = NL80211_CMD_START_SCHED_SCAN,
6567 .doit = nl80211_start_sched_scan,
6568 .policy = nl80211_policy,
6569 .flags = GENL_ADMIN_PERM,
6570 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6571 NL80211_FLAG_NEED_RTNL,
6572 },
6573 {
6574 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6575 .doit = nl80211_stop_sched_scan,
6576 .policy = nl80211_policy,
6577 .flags = GENL_ADMIN_PERM,
6578 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6579 NL80211_FLAG_NEED_RTNL,
6580 },
6581 {
6582 .cmd = NL80211_CMD_AUTHENTICATE,
6583 .doit = nl80211_authenticate,
6584 .policy = nl80211_policy,
6585 .flags = GENL_ADMIN_PERM,
6586 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6587 NL80211_FLAG_NEED_RTNL,
6588 },
6589 {
6590 .cmd = NL80211_CMD_ASSOCIATE,
6591 .doit = nl80211_associate,
6592 .policy = nl80211_policy,
6593 .flags = GENL_ADMIN_PERM,
6594 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6595 NL80211_FLAG_NEED_RTNL,
6596 },
6597 {
6598 .cmd = NL80211_CMD_DEAUTHENTICATE,
6599 .doit = nl80211_deauthenticate,
6600 .policy = nl80211_policy,
6601 .flags = GENL_ADMIN_PERM,
6602 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6603 NL80211_FLAG_NEED_RTNL,
6604 },
6605 {
6606 .cmd = NL80211_CMD_DISASSOCIATE,
6607 .doit = nl80211_disassociate,
6608 .policy = nl80211_policy,
6609 .flags = GENL_ADMIN_PERM,
6610 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6611 NL80211_FLAG_NEED_RTNL,
6612 },
6613 {
6614 .cmd = NL80211_CMD_JOIN_IBSS,
6615 .doit = nl80211_join_ibss,
6616 .policy = nl80211_policy,
6617 .flags = GENL_ADMIN_PERM,
6618 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6619 NL80211_FLAG_NEED_RTNL,
6620 },
6621 {
6622 .cmd = NL80211_CMD_LEAVE_IBSS,
6623 .doit = nl80211_leave_ibss,
6624 .policy = nl80211_policy,
6625 .flags = GENL_ADMIN_PERM,
6626 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6627 NL80211_FLAG_NEED_RTNL,
6628 },
6629 #ifdef CONFIG_NL80211_TESTMODE
6630 {
6631 .cmd = NL80211_CMD_TESTMODE,
6632 .doit = nl80211_testmode_do,
6633 .dumpit = nl80211_testmode_dump,
6634 .policy = nl80211_policy,
6635 .flags = GENL_ADMIN_PERM,
6636 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6637 NL80211_FLAG_NEED_RTNL,
6638 },
6639 #endif
6640 {
6641 .cmd = NL80211_CMD_CONNECT,
6642 .doit = nl80211_connect,
6643 .policy = nl80211_policy,
6644 .flags = GENL_ADMIN_PERM,
6645 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6646 NL80211_FLAG_NEED_RTNL,
6647 },
6648 {
6649 .cmd = NL80211_CMD_DISCONNECT,
6650 .doit = nl80211_disconnect,
6651 .policy = nl80211_policy,
6652 .flags = GENL_ADMIN_PERM,
6653 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6654 NL80211_FLAG_NEED_RTNL,
6655 },
6656 {
6657 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6658 .doit = nl80211_wiphy_netns,
6659 .policy = nl80211_policy,
6660 .flags = GENL_ADMIN_PERM,
6661 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6662 NL80211_FLAG_NEED_RTNL,
6663 },
6664 {
6665 .cmd = NL80211_CMD_GET_SURVEY,
6666 .policy = nl80211_policy,
6667 .dumpit = nl80211_dump_survey,
6668 },
6669 {
6670 .cmd = NL80211_CMD_SET_PMKSA,
6671 .doit = nl80211_setdel_pmksa,
6672 .policy = nl80211_policy,
6673 .flags = GENL_ADMIN_PERM,
6674 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6675 NL80211_FLAG_NEED_RTNL,
6676 },
6677 {
6678 .cmd = NL80211_CMD_DEL_PMKSA,
6679 .doit = nl80211_setdel_pmksa,
6680 .policy = nl80211_policy,
6681 .flags = GENL_ADMIN_PERM,
6682 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6683 NL80211_FLAG_NEED_RTNL,
6684 },
6685 {
6686 .cmd = NL80211_CMD_FLUSH_PMKSA,
6687 .doit = nl80211_flush_pmksa,
6688 .policy = nl80211_policy,
6689 .flags = GENL_ADMIN_PERM,
6690 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6691 NL80211_FLAG_NEED_RTNL,
6692 },
6693 {
6694 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6695 .doit = nl80211_remain_on_channel,
6696 .policy = nl80211_policy,
6697 .flags = GENL_ADMIN_PERM,
6698 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6699 NL80211_FLAG_NEED_RTNL,
6700 },
6701 {
6702 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6703 .doit = nl80211_cancel_remain_on_channel,
6704 .policy = nl80211_policy,
6705 .flags = GENL_ADMIN_PERM,
6706 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6707 NL80211_FLAG_NEED_RTNL,
6708 },
6709 {
6710 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6711 .doit = nl80211_set_tx_bitrate_mask,
6712 .policy = nl80211_policy,
6713 .flags = GENL_ADMIN_PERM,
6714 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6715 NL80211_FLAG_NEED_RTNL,
6716 },
6717 {
6718 .cmd = NL80211_CMD_REGISTER_FRAME,
6719 .doit = nl80211_register_mgmt,
6720 .policy = nl80211_policy,
6721 .flags = GENL_ADMIN_PERM,
6722 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6723 NL80211_FLAG_NEED_RTNL,
6724 },
6725 {
6726 .cmd = NL80211_CMD_FRAME,
6727 .doit = nl80211_tx_mgmt,
6728 .policy = nl80211_policy,
6729 .flags = GENL_ADMIN_PERM,
6730 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6731 NL80211_FLAG_NEED_RTNL,
6732 },
6733 {
6734 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6735 .doit = nl80211_tx_mgmt_cancel_wait,
6736 .policy = nl80211_policy,
6737 .flags = GENL_ADMIN_PERM,
6738 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6739 NL80211_FLAG_NEED_RTNL,
6740 },
6741 {
6742 .cmd = NL80211_CMD_SET_POWER_SAVE,
6743 .doit = nl80211_set_power_save,
6744 .policy = nl80211_policy,
6745 .flags = GENL_ADMIN_PERM,
6746 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6747 NL80211_FLAG_NEED_RTNL,
6748 },
6749 {
6750 .cmd = NL80211_CMD_GET_POWER_SAVE,
6751 .doit = nl80211_get_power_save,
6752 .policy = nl80211_policy,
6753 /* can be retrieved by unprivileged users */
6754 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6755 NL80211_FLAG_NEED_RTNL,
6756 },
6757 {
6758 .cmd = NL80211_CMD_SET_CQM,
6759 .doit = nl80211_set_cqm,
6760 .policy = nl80211_policy,
6761 .flags = GENL_ADMIN_PERM,
6762 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6763 NL80211_FLAG_NEED_RTNL,
6764 },
6765 {
6766 .cmd = NL80211_CMD_SET_CHANNEL,
6767 .doit = nl80211_set_channel,
6768 .policy = nl80211_policy,
6769 .flags = GENL_ADMIN_PERM,
6770 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6771 NL80211_FLAG_NEED_RTNL,
6772 },
6773 {
6774 .cmd = NL80211_CMD_SET_WDS_PEER,
6775 .doit = nl80211_set_wds_peer,
6776 .policy = nl80211_policy,
6777 .flags = GENL_ADMIN_PERM,
6778 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6779 NL80211_FLAG_NEED_RTNL,
6780 },
6781 {
6782 .cmd = NL80211_CMD_JOIN_MESH,
6783 .doit = nl80211_join_mesh,
6784 .policy = nl80211_policy,
6785 .flags = GENL_ADMIN_PERM,
6786 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6787 NL80211_FLAG_NEED_RTNL,
6788 },
6789 {
6790 .cmd = NL80211_CMD_LEAVE_MESH,
6791 .doit = nl80211_leave_mesh,
6792 .policy = nl80211_policy,
6793 .flags = GENL_ADMIN_PERM,
6794 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6795 NL80211_FLAG_NEED_RTNL,
6796 },
6797 {
6798 .cmd = NL80211_CMD_GET_WOWLAN,
6799 .doit = nl80211_get_wowlan,
6800 .policy = nl80211_policy,
6801 /* can be retrieved by unprivileged users */
6802 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6803 NL80211_FLAG_NEED_RTNL,
6804 },
6805 {
6806 .cmd = NL80211_CMD_SET_WOWLAN,
6807 .doit = nl80211_set_wowlan,
6808 .policy = nl80211_policy,
6809 .flags = GENL_ADMIN_PERM,
6810 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6811 NL80211_FLAG_NEED_RTNL,
6812 },
6813 {
6814 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6815 .doit = nl80211_set_rekey_data,
6816 .policy = nl80211_policy,
6817 .flags = GENL_ADMIN_PERM,
6818 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6819 NL80211_FLAG_NEED_RTNL,
6820 },
6821 {
6822 .cmd = NL80211_CMD_TDLS_MGMT,
6823 .doit = nl80211_tdls_mgmt,
6824 .policy = nl80211_policy,
6825 .flags = GENL_ADMIN_PERM,
6826 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6827 NL80211_FLAG_NEED_RTNL,
6828 },
6829 {
6830 .cmd = NL80211_CMD_TDLS_OPER,
6831 .doit = nl80211_tdls_oper,
6832 .policy = nl80211_policy,
6833 .flags = GENL_ADMIN_PERM,
6834 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6835 NL80211_FLAG_NEED_RTNL,
6836 },
6837 {
6838 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
6839 .doit = nl80211_register_unexpected_frame,
6840 .policy = nl80211_policy,
6841 .flags = GENL_ADMIN_PERM,
6842 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6843 NL80211_FLAG_NEED_RTNL,
6844 },
6845 {
6846 .cmd = NL80211_CMD_PROBE_CLIENT,
6847 .doit = nl80211_probe_client,
6848 .policy = nl80211_policy,
6849 .flags = GENL_ADMIN_PERM,
6850 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6851 NL80211_FLAG_NEED_RTNL,
6852 },
6853 {
6854 .cmd = NL80211_CMD_REGISTER_BEACONS,
6855 .doit = nl80211_register_beacons,
6856 .policy = nl80211_policy,
6857 .flags = GENL_ADMIN_PERM,
6858 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6859 NL80211_FLAG_NEED_RTNL,
6860 },
6861 {
6862 .cmd = NL80211_CMD_SET_NOACK_MAP,
6863 .doit = nl80211_set_noack_map,
6864 .policy = nl80211_policy,
6865 .flags = GENL_ADMIN_PERM,
6866 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6867 NL80211_FLAG_NEED_RTNL,
6868 },
6869
6870 };
6871
6872 static struct genl_multicast_group nl80211_mlme_mcgrp = {
6873 .name = "mlme",
6874 };
6875
6876 /* multicast groups */
6877 static struct genl_multicast_group nl80211_config_mcgrp = {
6878 .name = "config",
6879 };
6880 static struct genl_multicast_group nl80211_scan_mcgrp = {
6881 .name = "scan",
6882 };
6883 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
6884 .name = "regulatory",
6885 };
6886
6887 /* notification functions */
6888
nl80211_notify_dev_rename(struct cfg80211_registered_device * rdev)6889 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
6890 {
6891 struct sk_buff *msg;
6892
6893 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6894 if (!msg)
6895 return;
6896
6897 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
6898 nlmsg_free(msg);
6899 return;
6900 }
6901
6902 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6903 nl80211_config_mcgrp.id, GFP_KERNEL);
6904 }
6905
nl80211_add_scan_req(struct sk_buff * msg,struct cfg80211_registered_device * rdev)6906 static int nl80211_add_scan_req(struct sk_buff *msg,
6907 struct cfg80211_registered_device *rdev)
6908 {
6909 struct cfg80211_scan_request *req = rdev->scan_req;
6910 struct nlattr *nest;
6911 int i;
6912
6913 ASSERT_RDEV_LOCK(rdev);
6914
6915 if (WARN_ON(!req))
6916 return 0;
6917
6918 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
6919 if (!nest)
6920 goto nla_put_failure;
6921 for (i = 0; i < req->n_ssids; i++)
6922 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
6923 nla_nest_end(msg, nest);
6924
6925 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
6926 if (!nest)
6927 goto nla_put_failure;
6928 for (i = 0; i < req->n_channels; i++)
6929 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
6930 nla_nest_end(msg, nest);
6931
6932 if (req->ie)
6933 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
6934
6935 return 0;
6936 nla_put_failure:
6937 return -ENOBUFS;
6938 }
6939
nl80211_send_scan_msg(struct sk_buff * msg,struct cfg80211_registered_device * rdev,struct net_device * netdev,u32 pid,u32 seq,int flags,u32 cmd)6940 static int nl80211_send_scan_msg(struct sk_buff *msg,
6941 struct cfg80211_registered_device *rdev,
6942 struct net_device *netdev,
6943 u32 pid, u32 seq, int flags,
6944 u32 cmd)
6945 {
6946 void *hdr;
6947
6948 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6949 if (!hdr)
6950 return -1;
6951
6952 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6953 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6954
6955 /* ignore errors and send incomplete event anyway */
6956 nl80211_add_scan_req(msg, rdev);
6957
6958 return genlmsg_end(msg, hdr);
6959
6960 nla_put_failure:
6961 genlmsg_cancel(msg, hdr);
6962 return -EMSGSIZE;
6963 }
6964
6965 static int
nl80211_send_sched_scan_msg(struct sk_buff * msg,struct cfg80211_registered_device * rdev,struct net_device * netdev,u32 pid,u32 seq,int flags,u32 cmd)6966 nl80211_send_sched_scan_msg(struct sk_buff *msg,
6967 struct cfg80211_registered_device *rdev,
6968 struct net_device *netdev,
6969 u32 pid, u32 seq, int flags, u32 cmd)
6970 {
6971 void *hdr;
6972
6973 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6974 if (!hdr)
6975 return -1;
6976
6977 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6978 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6979
6980 return genlmsg_end(msg, hdr);
6981
6982 nla_put_failure:
6983 genlmsg_cancel(msg, hdr);
6984 return -EMSGSIZE;
6985 }
6986
nl80211_send_scan_start(struct cfg80211_registered_device * rdev,struct net_device * netdev)6987 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
6988 struct net_device *netdev)
6989 {
6990 struct sk_buff *msg;
6991
6992 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6993 if (!msg)
6994 return;
6995
6996 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6997 NL80211_CMD_TRIGGER_SCAN) < 0) {
6998 nlmsg_free(msg);
6999 return;
7000 }
7001
7002 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7003 nl80211_scan_mcgrp.id, GFP_KERNEL);
7004 }
7005
nl80211_send_scan_done(struct cfg80211_registered_device * rdev,struct net_device * netdev)7006 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7007 struct net_device *netdev)
7008 {
7009 struct sk_buff *msg;
7010
7011 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7012 if (!msg)
7013 return;
7014
7015 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7016 NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7017 nlmsg_free(msg);
7018 return;
7019 }
7020
7021 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7022 nl80211_scan_mcgrp.id, GFP_KERNEL);
7023 }
7024
nl80211_send_scan_aborted(struct cfg80211_registered_device * rdev,struct net_device * netdev)7025 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7026 struct net_device *netdev)
7027 {
7028 struct sk_buff *msg;
7029
7030 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7031 if (!msg)
7032 return;
7033
7034 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7035 NL80211_CMD_SCAN_ABORTED) < 0) {
7036 nlmsg_free(msg);
7037 return;
7038 }
7039
7040 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7041 nl80211_scan_mcgrp.id, GFP_KERNEL);
7042 }
7043
nl80211_send_sched_scan_results(struct cfg80211_registered_device * rdev,struct net_device * netdev)7044 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7045 struct net_device *netdev)
7046 {
7047 struct sk_buff *msg;
7048
7049 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7050 if (!msg)
7051 return;
7052
7053 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7054 NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7055 nlmsg_free(msg);
7056 return;
7057 }
7058
7059 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7060 nl80211_scan_mcgrp.id, GFP_KERNEL);
7061 }
7062
nl80211_send_sched_scan(struct cfg80211_registered_device * rdev,struct net_device * netdev,u32 cmd)7063 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7064 struct net_device *netdev, u32 cmd)
7065 {
7066 struct sk_buff *msg;
7067
7068 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7069 if (!msg)
7070 return;
7071
7072 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7073 nlmsg_free(msg);
7074 return;
7075 }
7076
7077 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7078 nl80211_scan_mcgrp.id, GFP_KERNEL);
7079 }
7080
7081 /*
7082 * This can happen on global regulatory changes or device specific settings
7083 * based on custom world regulatory domains.
7084 */
nl80211_send_reg_change_event(struct regulatory_request * request)7085 void nl80211_send_reg_change_event(struct regulatory_request *request)
7086 {
7087 struct sk_buff *msg;
7088 void *hdr;
7089
7090 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7091 if (!msg)
7092 return;
7093
7094 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7095 if (!hdr) {
7096 nlmsg_free(msg);
7097 return;
7098 }
7099
7100 /* Userspace can always count this one always being set */
7101 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
7102
7103 if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
7104 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7105 NL80211_REGDOM_TYPE_WORLD);
7106 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
7107 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7108 NL80211_REGDOM_TYPE_CUSTOM_WORLD);
7109 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7110 request->intersect)
7111 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7112 NL80211_REGDOM_TYPE_INTERSECTION);
7113 else {
7114 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7115 NL80211_REGDOM_TYPE_COUNTRY);
7116 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
7117 }
7118
7119 if (wiphy_idx_valid(request->wiphy_idx))
7120 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
7121
7122 genlmsg_end(msg, hdr);
7123
7124 rcu_read_lock();
7125 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7126 GFP_ATOMIC);
7127 rcu_read_unlock();
7128
7129 return;
7130
7131 nla_put_failure:
7132 genlmsg_cancel(msg, hdr);
7133 nlmsg_free(msg);
7134 }
7135
nl80211_send_mlme_event(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * buf,size_t len,enum nl80211_commands cmd,gfp_t gfp)7136 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7137 struct net_device *netdev,
7138 const u8 *buf, size_t len,
7139 enum nl80211_commands cmd, gfp_t gfp)
7140 {
7141 struct sk_buff *msg;
7142 void *hdr;
7143
7144 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7145 if (!msg)
7146 return;
7147
7148 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7149 if (!hdr) {
7150 nlmsg_free(msg);
7151 return;
7152 }
7153
7154 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7155 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7156 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7157
7158 genlmsg_end(msg, hdr);
7159
7160 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7161 nl80211_mlme_mcgrp.id, gfp);
7162 return;
7163
7164 nla_put_failure:
7165 genlmsg_cancel(msg, hdr);
7166 nlmsg_free(msg);
7167 }
7168
nl80211_send_rx_auth(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * buf,size_t len,gfp_t gfp)7169 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7170 struct net_device *netdev, const u8 *buf,
7171 size_t len, gfp_t gfp)
7172 {
7173 nl80211_send_mlme_event(rdev, netdev, buf, len,
7174 NL80211_CMD_AUTHENTICATE, gfp);
7175 }
7176
nl80211_send_rx_assoc(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * buf,size_t len,gfp_t gfp)7177 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7178 struct net_device *netdev, const u8 *buf,
7179 size_t len, gfp_t gfp)
7180 {
7181 nl80211_send_mlme_event(rdev, netdev, buf, len,
7182 NL80211_CMD_ASSOCIATE, gfp);
7183 }
7184
nl80211_send_deauth(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * buf,size_t len,gfp_t gfp)7185 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7186 struct net_device *netdev, const u8 *buf,
7187 size_t len, gfp_t gfp)
7188 {
7189 nl80211_send_mlme_event(rdev, netdev, buf, len,
7190 NL80211_CMD_DEAUTHENTICATE, gfp);
7191 }
7192
nl80211_send_disassoc(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * buf,size_t len,gfp_t gfp)7193 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7194 struct net_device *netdev, const u8 *buf,
7195 size_t len, gfp_t gfp)
7196 {
7197 nl80211_send_mlme_event(rdev, netdev, buf, len,
7198 NL80211_CMD_DISASSOCIATE, gfp);
7199 }
7200
nl80211_send_unprot_deauth(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * buf,size_t len,gfp_t gfp)7201 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7202 struct net_device *netdev, const u8 *buf,
7203 size_t len, gfp_t gfp)
7204 {
7205 nl80211_send_mlme_event(rdev, netdev, buf, len,
7206 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7207 }
7208
nl80211_send_unprot_disassoc(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * buf,size_t len,gfp_t gfp)7209 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7210 struct net_device *netdev, const u8 *buf,
7211 size_t len, gfp_t gfp)
7212 {
7213 nl80211_send_mlme_event(rdev, netdev, buf, len,
7214 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7215 }
7216
nl80211_send_mlme_timeout(struct cfg80211_registered_device * rdev,struct net_device * netdev,int cmd,const u8 * addr,gfp_t gfp)7217 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7218 struct net_device *netdev, int cmd,
7219 const u8 *addr, gfp_t gfp)
7220 {
7221 struct sk_buff *msg;
7222 void *hdr;
7223
7224 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7225 if (!msg)
7226 return;
7227
7228 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7229 if (!hdr) {
7230 nlmsg_free(msg);
7231 return;
7232 }
7233
7234 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7235 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7236 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
7237 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7238
7239 genlmsg_end(msg, hdr);
7240
7241 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7242 nl80211_mlme_mcgrp.id, gfp);
7243 return;
7244
7245 nla_put_failure:
7246 genlmsg_cancel(msg, hdr);
7247 nlmsg_free(msg);
7248 }
7249
nl80211_send_auth_timeout(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * addr,gfp_t gfp)7250 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7251 struct net_device *netdev, const u8 *addr,
7252 gfp_t gfp)
7253 {
7254 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7255 addr, gfp);
7256 }
7257
nl80211_send_assoc_timeout(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * addr,gfp_t gfp)7258 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7259 struct net_device *netdev, const u8 *addr,
7260 gfp_t gfp)
7261 {
7262 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7263 addr, gfp);
7264 }
7265
nl80211_send_connect_result(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * bssid,const u8 * req_ie,size_t req_ie_len,const u8 * resp_ie,size_t resp_ie_len,u16 status,gfp_t gfp)7266 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7267 struct net_device *netdev, const u8 *bssid,
7268 const u8 *req_ie, size_t req_ie_len,
7269 const u8 *resp_ie, size_t resp_ie_len,
7270 u16 status, gfp_t gfp)
7271 {
7272 struct sk_buff *msg;
7273 void *hdr;
7274
7275 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7276 if (!msg)
7277 return;
7278
7279 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7280 if (!hdr) {
7281 nlmsg_free(msg);
7282 return;
7283 }
7284
7285 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7286 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7287 if (bssid)
7288 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7289 NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
7290 if (req_ie)
7291 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7292 if (resp_ie)
7293 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7294
7295 genlmsg_end(msg, hdr);
7296
7297 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7298 nl80211_mlme_mcgrp.id, gfp);
7299 return;
7300
7301 nla_put_failure:
7302 genlmsg_cancel(msg, hdr);
7303 nlmsg_free(msg);
7304
7305 }
7306
nl80211_send_roamed(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * bssid,const u8 * req_ie,size_t req_ie_len,const u8 * resp_ie,size_t resp_ie_len,gfp_t gfp)7307 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7308 struct net_device *netdev, const u8 *bssid,
7309 const u8 *req_ie, size_t req_ie_len,
7310 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7311 {
7312 struct sk_buff *msg;
7313 void *hdr;
7314
7315 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7316 if (!msg)
7317 return;
7318
7319 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7320 if (!hdr) {
7321 nlmsg_free(msg);
7322 return;
7323 }
7324
7325 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7326 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7327 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7328 if (req_ie)
7329 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7330 if (resp_ie)
7331 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7332
7333 genlmsg_end(msg, hdr);
7334
7335 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7336 nl80211_mlme_mcgrp.id, gfp);
7337 return;
7338
7339 nla_put_failure:
7340 genlmsg_cancel(msg, hdr);
7341 nlmsg_free(msg);
7342
7343 }
7344
nl80211_send_disconnected(struct cfg80211_registered_device * rdev,struct net_device * netdev,u16 reason,const u8 * ie,size_t ie_len,bool from_ap)7345 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7346 struct net_device *netdev, u16 reason,
7347 const u8 *ie, size_t ie_len, bool from_ap)
7348 {
7349 struct sk_buff *msg;
7350 void *hdr;
7351
7352 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7353 if (!msg)
7354 return;
7355
7356 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7357 if (!hdr) {
7358 nlmsg_free(msg);
7359 return;
7360 }
7361
7362 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7363 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7364 if (from_ap && reason)
7365 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
7366 if (from_ap)
7367 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
7368 if (ie)
7369 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
7370
7371 genlmsg_end(msg, hdr);
7372
7373 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7374 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7375 return;
7376
7377 nla_put_failure:
7378 genlmsg_cancel(msg, hdr);
7379 nlmsg_free(msg);
7380
7381 }
7382
nl80211_send_ibss_bssid(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * bssid,gfp_t gfp)7383 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7384 struct net_device *netdev, const u8 *bssid,
7385 gfp_t gfp)
7386 {
7387 struct sk_buff *msg;
7388 void *hdr;
7389
7390 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7391 if (!msg)
7392 return;
7393
7394 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7395 if (!hdr) {
7396 nlmsg_free(msg);
7397 return;
7398 }
7399
7400 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7401 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7402 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7403
7404 genlmsg_end(msg, hdr);
7405
7406 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7407 nl80211_mlme_mcgrp.id, gfp);
7408 return;
7409
7410 nla_put_failure:
7411 genlmsg_cancel(msg, hdr);
7412 nlmsg_free(msg);
7413 }
7414
nl80211_send_new_peer_candidate(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * macaddr,const u8 * ie,u8 ie_len,gfp_t gfp)7415 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7416 struct net_device *netdev,
7417 const u8 *macaddr, const u8* ie, u8 ie_len,
7418 gfp_t gfp)
7419 {
7420 struct sk_buff *msg;
7421 void *hdr;
7422
7423 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7424 if (!msg)
7425 return;
7426
7427 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7428 if (!hdr) {
7429 nlmsg_free(msg);
7430 return;
7431 }
7432
7433 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7434 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7435 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
7436 if (ie_len && ie)
7437 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
7438
7439 genlmsg_end(msg, hdr);
7440
7441 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7442 nl80211_mlme_mcgrp.id, gfp);
7443 return;
7444
7445 nla_put_failure:
7446 genlmsg_cancel(msg, hdr);
7447 nlmsg_free(msg);
7448 }
7449
nl80211_michael_mic_failure(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * addr,enum nl80211_key_type key_type,int key_id,const u8 * tsc,gfp_t gfp)7450 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7451 struct net_device *netdev, const u8 *addr,
7452 enum nl80211_key_type key_type, int key_id,
7453 const u8 *tsc, gfp_t gfp)
7454 {
7455 struct sk_buff *msg;
7456 void *hdr;
7457
7458 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7459 if (!msg)
7460 return;
7461
7462 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7463 if (!hdr) {
7464 nlmsg_free(msg);
7465 return;
7466 }
7467
7468 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7469 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7470 if (addr)
7471 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7472 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
7473 if (key_id != -1)
7474 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
7475 if (tsc)
7476 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
7477
7478 genlmsg_end(msg, hdr);
7479
7480 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7481 nl80211_mlme_mcgrp.id, gfp);
7482 return;
7483
7484 nla_put_failure:
7485 genlmsg_cancel(msg, hdr);
7486 nlmsg_free(msg);
7487 }
7488
nl80211_send_beacon_hint_event(struct wiphy * wiphy,struct ieee80211_channel * channel_before,struct ieee80211_channel * channel_after)7489 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7490 struct ieee80211_channel *channel_before,
7491 struct ieee80211_channel *channel_after)
7492 {
7493 struct sk_buff *msg;
7494 void *hdr;
7495 struct nlattr *nl_freq;
7496
7497 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7498 if (!msg)
7499 return;
7500
7501 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7502 if (!hdr) {
7503 nlmsg_free(msg);
7504 return;
7505 }
7506
7507 /*
7508 * Since we are applying the beacon hint to a wiphy we know its
7509 * wiphy_idx is valid
7510 */
7511 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
7512
7513 /* Before */
7514 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7515 if (!nl_freq)
7516 goto nla_put_failure;
7517 if (nl80211_msg_put_channel(msg, channel_before))
7518 goto nla_put_failure;
7519 nla_nest_end(msg, nl_freq);
7520
7521 /* After */
7522 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7523 if (!nl_freq)
7524 goto nla_put_failure;
7525 if (nl80211_msg_put_channel(msg, channel_after))
7526 goto nla_put_failure;
7527 nla_nest_end(msg, nl_freq);
7528
7529 genlmsg_end(msg, hdr);
7530
7531 rcu_read_lock();
7532 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7533 GFP_ATOMIC);
7534 rcu_read_unlock();
7535
7536 return;
7537
7538 nla_put_failure:
7539 genlmsg_cancel(msg, hdr);
7540 nlmsg_free(msg);
7541 }
7542
nl80211_send_remain_on_chan_event(int cmd,struct cfg80211_registered_device * rdev,struct net_device * netdev,u64 cookie,struct ieee80211_channel * chan,enum nl80211_channel_type channel_type,unsigned int duration,gfp_t gfp)7543 static void nl80211_send_remain_on_chan_event(
7544 int cmd, struct cfg80211_registered_device *rdev,
7545 struct net_device *netdev, u64 cookie,
7546 struct ieee80211_channel *chan,
7547 enum nl80211_channel_type channel_type,
7548 unsigned int duration, gfp_t gfp)
7549 {
7550 struct sk_buff *msg;
7551 void *hdr;
7552
7553 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7554 if (!msg)
7555 return;
7556
7557 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7558 if (!hdr) {
7559 nlmsg_free(msg);
7560 return;
7561 }
7562
7563 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7564 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7565 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
7566 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
7567 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7568
7569 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
7570 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
7571
7572 genlmsg_end(msg, hdr);
7573
7574 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7575 nl80211_mlme_mcgrp.id, gfp);
7576 return;
7577
7578 nla_put_failure:
7579 genlmsg_cancel(msg, hdr);
7580 nlmsg_free(msg);
7581 }
7582
nl80211_send_remain_on_channel(struct cfg80211_registered_device * rdev,struct net_device * netdev,u64 cookie,struct ieee80211_channel * chan,enum nl80211_channel_type channel_type,unsigned int duration,gfp_t gfp)7583 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7584 struct net_device *netdev, u64 cookie,
7585 struct ieee80211_channel *chan,
7586 enum nl80211_channel_type channel_type,
7587 unsigned int duration, gfp_t gfp)
7588 {
7589 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7590 rdev, netdev, cookie, chan,
7591 channel_type, duration, gfp);
7592 }
7593
nl80211_send_remain_on_channel_cancel(struct cfg80211_registered_device * rdev,struct net_device * netdev,u64 cookie,struct ieee80211_channel * chan,enum nl80211_channel_type channel_type,gfp_t gfp)7594 void nl80211_send_remain_on_channel_cancel(
7595 struct cfg80211_registered_device *rdev, struct net_device *netdev,
7596 u64 cookie, struct ieee80211_channel *chan,
7597 enum nl80211_channel_type channel_type, gfp_t gfp)
7598 {
7599 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7600 rdev, netdev, cookie, chan,
7601 channel_type, 0, gfp);
7602 }
7603
nl80211_send_sta_event(struct cfg80211_registered_device * rdev,struct net_device * dev,const u8 * mac_addr,struct station_info * sinfo,gfp_t gfp)7604 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7605 struct net_device *dev, const u8 *mac_addr,
7606 struct station_info *sinfo, gfp_t gfp)
7607 {
7608 struct sk_buff *msg;
7609
7610 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7611 if (!msg)
7612 return;
7613
7614 if (nl80211_send_station(msg, 0, 0, 0,
7615 rdev, dev, mac_addr, sinfo) < 0) {
7616 nlmsg_free(msg);
7617 return;
7618 }
7619
7620 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7621 nl80211_mlme_mcgrp.id, gfp);
7622 }
7623
nl80211_send_sta_del_event(struct cfg80211_registered_device * rdev,struct net_device * dev,const u8 * mac_addr,gfp_t gfp)7624 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7625 struct net_device *dev, const u8 *mac_addr,
7626 gfp_t gfp)
7627 {
7628 struct sk_buff *msg;
7629 void *hdr;
7630
7631 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7632 if (!msg)
7633 return;
7634
7635 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7636 if (!hdr) {
7637 nlmsg_free(msg);
7638 return;
7639 }
7640
7641 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7642 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
7643
7644 genlmsg_end(msg, hdr);
7645
7646 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7647 nl80211_mlme_mcgrp.id, gfp);
7648 return;
7649
7650 nla_put_failure:
7651 genlmsg_cancel(msg, hdr);
7652 nlmsg_free(msg);
7653 }
7654
__nl80211_unexpected_frame(struct net_device * dev,u8 cmd,const u8 * addr,gfp_t gfp)7655 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7656 const u8 *addr, gfp_t gfp)
7657 {
7658 struct wireless_dev *wdev = dev->ieee80211_ptr;
7659 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7660 struct sk_buff *msg;
7661 void *hdr;
7662 int err;
7663 u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7664
7665 if (!nlpid)
7666 return false;
7667
7668 msg = nlmsg_new(100, gfp);
7669 if (!msg)
7670 return true;
7671
7672 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7673 if (!hdr) {
7674 nlmsg_free(msg);
7675 return true;
7676 }
7677
7678 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7679 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7680 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7681
7682 err = genlmsg_end(msg, hdr);
7683 if (err < 0) {
7684 nlmsg_free(msg);
7685 return true;
7686 }
7687
7688 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7689 return true;
7690
7691 nla_put_failure:
7692 genlmsg_cancel(msg, hdr);
7693 nlmsg_free(msg);
7694 return true;
7695 }
7696
nl80211_unexpected_frame(struct net_device * dev,const u8 * addr,gfp_t gfp)7697 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7698 {
7699 return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7700 addr, gfp);
7701 }
7702
nl80211_unexpected_4addr_frame(struct net_device * dev,const u8 * addr,gfp_t gfp)7703 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7704 const u8 *addr, gfp_t gfp)
7705 {
7706 return __nl80211_unexpected_frame(dev,
7707 NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7708 addr, gfp);
7709 }
7710
nl80211_send_mgmt(struct cfg80211_registered_device * rdev,struct net_device * netdev,u32 nlpid,int freq,int sig_dbm,const u8 * buf,size_t len,gfp_t gfp)7711 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7712 struct net_device *netdev, u32 nlpid,
7713 int freq, int sig_dbm,
7714 const u8 *buf, size_t len, gfp_t gfp)
7715 {
7716 struct sk_buff *msg;
7717 void *hdr;
7718
7719 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7720 if (!msg)
7721 return -ENOMEM;
7722
7723 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7724 if (!hdr) {
7725 nlmsg_free(msg);
7726 return -ENOMEM;
7727 }
7728
7729 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7730 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7731 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7732 if (sig_dbm)
7733 NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
7734 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7735
7736 genlmsg_end(msg, hdr);
7737
7738 return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7739
7740 nla_put_failure:
7741 genlmsg_cancel(msg, hdr);
7742 nlmsg_free(msg);
7743 return -ENOBUFS;
7744 }
7745
nl80211_send_mgmt_tx_status(struct cfg80211_registered_device * rdev,struct net_device * netdev,u64 cookie,const u8 * buf,size_t len,bool ack,gfp_t gfp)7746 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7747 struct net_device *netdev, u64 cookie,
7748 const u8 *buf, size_t len, bool ack,
7749 gfp_t gfp)
7750 {
7751 struct sk_buff *msg;
7752 void *hdr;
7753
7754 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7755 if (!msg)
7756 return;
7757
7758 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7759 if (!hdr) {
7760 nlmsg_free(msg);
7761 return;
7762 }
7763
7764 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7765 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7766 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7767 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7768 if (ack)
7769 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7770
7771 genlmsg_end(msg, hdr);
7772
7773 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7774 nl80211_mlme_mcgrp.id, gfp);
7775 return;
7776
7777 nla_put_failure:
7778 genlmsg_cancel(msg, hdr);
7779 nlmsg_free(msg);
7780 }
7781
7782 void
nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device * rdev,struct net_device * netdev,enum nl80211_cqm_rssi_threshold_event rssi_event,gfp_t gfp)7783 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7784 struct net_device *netdev,
7785 enum nl80211_cqm_rssi_threshold_event rssi_event,
7786 gfp_t gfp)
7787 {
7788 struct sk_buff *msg;
7789 struct nlattr *pinfoattr;
7790 void *hdr;
7791
7792 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7793 if (!msg)
7794 return;
7795
7796 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7797 if (!hdr) {
7798 nlmsg_free(msg);
7799 return;
7800 }
7801
7802 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7803 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7804
7805 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7806 if (!pinfoattr)
7807 goto nla_put_failure;
7808
7809 NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7810 rssi_event);
7811
7812 nla_nest_end(msg, pinfoattr);
7813
7814 genlmsg_end(msg, hdr);
7815
7816 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7817 nl80211_mlme_mcgrp.id, gfp);
7818 return;
7819
7820 nla_put_failure:
7821 genlmsg_cancel(msg, hdr);
7822 nlmsg_free(msg);
7823 }
7824
nl80211_gtk_rekey_notify(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * bssid,const u8 * replay_ctr,gfp_t gfp)7825 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7826 struct net_device *netdev, const u8 *bssid,
7827 const u8 *replay_ctr, gfp_t gfp)
7828 {
7829 struct sk_buff *msg;
7830 struct nlattr *rekey_attr;
7831 void *hdr;
7832
7833 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7834 if (!msg)
7835 return;
7836
7837 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7838 if (!hdr) {
7839 nlmsg_free(msg);
7840 return;
7841 }
7842
7843 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7844 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7845 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7846
7847 rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7848 if (!rekey_attr)
7849 goto nla_put_failure;
7850
7851 NLA_PUT(msg, NL80211_REKEY_DATA_REPLAY_CTR,
7852 NL80211_REPLAY_CTR_LEN, replay_ctr);
7853
7854 nla_nest_end(msg, rekey_attr);
7855
7856 genlmsg_end(msg, hdr);
7857
7858 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7859 nl80211_mlme_mcgrp.id, gfp);
7860 return;
7861
7862 nla_put_failure:
7863 genlmsg_cancel(msg, hdr);
7864 nlmsg_free(msg);
7865 }
7866
nl80211_pmksa_candidate_notify(struct cfg80211_registered_device * rdev,struct net_device * netdev,int index,const u8 * bssid,bool preauth,gfp_t gfp)7867 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
7868 struct net_device *netdev, int index,
7869 const u8 *bssid, bool preauth, gfp_t gfp)
7870 {
7871 struct sk_buff *msg;
7872 struct nlattr *attr;
7873 void *hdr;
7874
7875 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7876 if (!msg)
7877 return;
7878
7879 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
7880 if (!hdr) {
7881 nlmsg_free(msg);
7882 return;
7883 }
7884
7885 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7886 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7887
7888 attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
7889 if (!attr)
7890 goto nla_put_failure;
7891
7892 NLA_PUT_U32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index);
7893 NLA_PUT(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid);
7894 if (preauth)
7895 NLA_PUT_FLAG(msg, NL80211_PMKSA_CANDIDATE_PREAUTH);
7896
7897 nla_nest_end(msg, attr);
7898
7899 genlmsg_end(msg, hdr);
7900
7901 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7902 nl80211_mlme_mcgrp.id, gfp);
7903 return;
7904
7905 nla_put_failure:
7906 genlmsg_cancel(msg, hdr);
7907 nlmsg_free(msg);
7908 }
7909
7910 void
nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device * rdev,struct net_device * netdev,const u8 * peer,u32 num_packets,gfp_t gfp)7911 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
7912 struct net_device *netdev, const u8 *peer,
7913 u32 num_packets, gfp_t gfp)
7914 {
7915 struct sk_buff *msg;
7916 struct nlattr *pinfoattr;
7917 void *hdr;
7918
7919 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7920 if (!msg)
7921 return;
7922
7923 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7924 if (!hdr) {
7925 nlmsg_free(msg);
7926 return;
7927 }
7928
7929 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7930 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7931 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
7932
7933 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7934 if (!pinfoattr)
7935 goto nla_put_failure;
7936
7937 NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
7938
7939 nla_nest_end(msg, pinfoattr);
7940
7941 genlmsg_end(msg, hdr);
7942
7943 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7944 nl80211_mlme_mcgrp.id, gfp);
7945 return;
7946
7947 nla_put_failure:
7948 genlmsg_cancel(msg, hdr);
7949 nlmsg_free(msg);
7950 }
7951
cfg80211_probe_status(struct net_device * dev,const u8 * addr,u64 cookie,bool acked,gfp_t gfp)7952 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
7953 u64 cookie, bool acked, gfp_t gfp)
7954 {
7955 struct wireless_dev *wdev = dev->ieee80211_ptr;
7956 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7957 struct sk_buff *msg;
7958 void *hdr;
7959 int err;
7960
7961 msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7962 if (!msg)
7963 return;
7964
7965 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
7966 if (!hdr) {
7967 nlmsg_free(msg);
7968 return;
7969 }
7970
7971 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7972 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7973 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7974 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7975 if (acked)
7976 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7977
7978 err = genlmsg_end(msg, hdr);
7979 if (err < 0) {
7980 nlmsg_free(msg);
7981 return;
7982 }
7983
7984 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7985 nl80211_mlme_mcgrp.id, gfp);
7986 return;
7987
7988 nla_put_failure:
7989 genlmsg_cancel(msg, hdr);
7990 nlmsg_free(msg);
7991 }
7992 EXPORT_SYMBOL(cfg80211_probe_status);
7993
cfg80211_report_obss_beacon(struct wiphy * wiphy,const u8 * frame,size_t len,int freq,int sig_dbm,gfp_t gfp)7994 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
7995 const u8 *frame, size_t len,
7996 int freq, int sig_dbm, gfp_t gfp)
7997 {
7998 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
7999 struct sk_buff *msg;
8000 void *hdr;
8001 u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8002
8003 if (!nlpid)
8004 return;
8005
8006 msg = nlmsg_new(len + 100, gfp);
8007 if (!msg)
8008 return;
8009
8010 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8011 if (!hdr) {
8012 nlmsg_free(msg);
8013 return;
8014 }
8015
8016 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
8017 if (freq)
8018 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
8019 if (sig_dbm)
8020 NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
8021 NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame);
8022
8023 genlmsg_end(msg, hdr);
8024
8025 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8026 return;
8027
8028 nla_put_failure:
8029 genlmsg_cancel(msg, hdr);
8030 nlmsg_free(msg);
8031 }
8032 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8033
nl80211_netlink_notify(struct notifier_block * nb,unsigned long state,void * _notify)8034 static int nl80211_netlink_notify(struct notifier_block * nb,
8035 unsigned long state,
8036 void *_notify)
8037 {
8038 struct netlink_notify *notify = _notify;
8039 struct cfg80211_registered_device *rdev;
8040 struct wireless_dev *wdev;
8041
8042 if (state != NETLINK_URELEASE)
8043 return NOTIFY_DONE;
8044
8045 rcu_read_lock();
8046
8047 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8048 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8049 cfg80211_mlme_unregister_socket(wdev, notify->pid);
8050 if (rdev->ap_beacons_nlpid == notify->pid)
8051 rdev->ap_beacons_nlpid = 0;
8052 }
8053
8054 rcu_read_unlock();
8055
8056 return NOTIFY_DONE;
8057 }
8058
8059 static struct notifier_block nl80211_netlink_notifier = {
8060 .notifier_call = nl80211_netlink_notify,
8061 };
8062
8063 /* initialisation/exit functions */
8064
nl80211_init(void)8065 int nl80211_init(void)
8066 {
8067 int err;
8068
8069 err = genl_register_family_with_ops(&nl80211_fam,
8070 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8071 if (err)
8072 return err;
8073
8074 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8075 if (err)
8076 goto err_out;
8077
8078 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8079 if (err)
8080 goto err_out;
8081
8082 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8083 if (err)
8084 goto err_out;
8085
8086 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8087 if (err)
8088 goto err_out;
8089
8090 #ifdef CONFIG_NL80211_TESTMODE
8091 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8092 if (err)
8093 goto err_out;
8094 #endif
8095
8096 err = netlink_register_notifier(&nl80211_netlink_notifier);
8097 if (err)
8098 goto err_out;
8099
8100 return 0;
8101 err_out:
8102 genl_unregister_family(&nl80211_fam);
8103 return err;
8104 }
8105
nl80211_exit(void)8106 void nl80211_exit(void)
8107 {
8108 netlink_unregister_notifier(&nl80211_netlink_notifier);
8109 genl_unregister_family(&nl80211_fam);
8110 }
8111