cfg80211: Add background scan period attribute.
[linux-3.10.git] / net / wireless / nl80211.c
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 */
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 */
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
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
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 */
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 */
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
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
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
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
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 *
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
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
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
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
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
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
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
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
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
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
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
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
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                 nla_for_each_nested(nl_txq_params,
1298                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1299                                     rem_txq_params) {
1300                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1301                                   nla_data(nl_txq_params),
1302                                   nla_len(nl_txq_params),
1303                                   txq_params_policy);
1304                         result = parse_txq_params(tb, &txq_params);
1305                         if (result)
1306                                 goto bad_res;
1307
1308                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1309                                                            netdev,
1310                                                            &txq_params);
1311                         if (result)
1312                                 goto bad_res;
1313                 }
1314         }
1315
1316         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1317                 result = __nl80211_set_channel(rdev, wdev, info);
1318                 if (result)
1319                         goto bad_res;
1320         }
1321
1322         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1323                 enum nl80211_tx_power_setting type;
1324                 int idx, mbm = 0;
1325
1326                 if (!rdev->ops->set_tx_power) {
1327                         result = -EOPNOTSUPP;
1328                         goto bad_res;
1329                 }
1330
1331                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1332                 type = nla_get_u32(info->attrs[idx]);
1333
1334                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1335                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1336                         result = -EINVAL;
1337                         goto bad_res;
1338                 }
1339
1340                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1341                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1342                         mbm = nla_get_u32(info->attrs[idx]);
1343                 }
1344
1345                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1346                 if (result)
1347                         goto bad_res;
1348         }
1349
1350         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1351             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1352                 u32 tx_ant, rx_ant;
1353                 if ((!rdev->wiphy.available_antennas_tx &&
1354                      !rdev->wiphy.available_antennas_rx) ||
1355                     !rdev->ops->set_antenna) {
1356                         result = -EOPNOTSUPP;
1357                         goto bad_res;
1358                 }
1359
1360                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1361                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1362
1363                 /* reject antenna configurations which don't match the
1364                  * available antenna masks, except for the "all" mask */
1365                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1366                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1367                         result = -EINVAL;
1368                         goto bad_res;
1369                 }
1370
1371                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1372                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1373
1374                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1375                 if (result)
1376                         goto bad_res;
1377         }
1378
1379         changed = 0;
1380
1381         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1382                 retry_short = nla_get_u8(
1383                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1384                 if (retry_short == 0) {
1385                         result = -EINVAL;
1386                         goto bad_res;
1387                 }
1388                 changed |= WIPHY_PARAM_RETRY_SHORT;
1389         }
1390
1391         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1392                 retry_long = nla_get_u8(
1393                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1394                 if (retry_long == 0) {
1395                         result = -EINVAL;
1396                         goto bad_res;
1397                 }
1398                 changed |= WIPHY_PARAM_RETRY_LONG;
1399         }
1400
1401         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1402                 frag_threshold = nla_get_u32(
1403                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1404                 if (frag_threshold < 256) {
1405                         result = -EINVAL;
1406                         goto bad_res;
1407                 }
1408                 if (frag_threshold != (u32) -1) {
1409                         /*
1410                          * Fragments (apart from the last one) are required to
1411                          * have even length. Make the fragmentation code
1412                          * simpler by stripping LSB should someone try to use
1413                          * odd threshold value.
1414                          */
1415                         frag_threshold &= ~0x1;
1416                 }
1417                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1418         }
1419
1420         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1421                 rts_threshold = nla_get_u32(
1422                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1423                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1424         }
1425
1426         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1427                 coverage_class = nla_get_u8(
1428                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1429                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1430         }
1431
1432         if (changed) {
1433                 u8 old_retry_short, old_retry_long;
1434                 u32 old_frag_threshold, old_rts_threshold;
1435                 u8 old_coverage_class;
1436
1437                 if (!rdev->ops->set_wiphy_params) {
1438                         result = -EOPNOTSUPP;
1439                         goto bad_res;
1440                 }
1441
1442                 old_retry_short = rdev->wiphy.retry_short;
1443                 old_retry_long = rdev->wiphy.retry_long;
1444                 old_frag_threshold = rdev->wiphy.frag_threshold;
1445                 old_rts_threshold = rdev->wiphy.rts_threshold;
1446                 old_coverage_class = rdev->wiphy.coverage_class;
1447
1448                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1449                         rdev->wiphy.retry_short = retry_short;
1450                 if (changed & WIPHY_PARAM_RETRY_LONG)
1451                         rdev->wiphy.retry_long = retry_long;
1452                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1453                         rdev->wiphy.frag_threshold = frag_threshold;
1454                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1455                         rdev->wiphy.rts_threshold = rts_threshold;
1456                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1457                         rdev->wiphy.coverage_class = coverage_class;
1458
1459                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1460                 if (result) {
1461                         rdev->wiphy.retry_short = old_retry_short;
1462                         rdev->wiphy.retry_long = old_retry_long;
1463                         rdev->wiphy.frag_threshold = old_frag_threshold;
1464                         rdev->wiphy.rts_threshold = old_rts_threshold;
1465                         rdev->wiphy.coverage_class = old_coverage_class;
1466                 }
1467         }
1468
1469  bad_res:
1470         mutex_unlock(&rdev->mtx);
1471         if (netdev)
1472                 dev_put(netdev);
1473         return result;
1474 }
1475
1476
1477 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1478                               struct cfg80211_registered_device *rdev,
1479                               struct net_device *dev)
1480 {
1481         void *hdr;
1482
1483         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1484         if (!hdr)
1485                 return -1;
1486
1487         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1488         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1489         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1490         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1491
1492         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1493                     rdev->devlist_generation ^
1494                         (cfg80211_rdev_list_generation << 2));
1495
1496         return genlmsg_end(msg, hdr);
1497
1498  nla_put_failure:
1499         genlmsg_cancel(msg, hdr);
1500         return -EMSGSIZE;
1501 }
1502
1503 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1504 {
1505         int wp_idx = 0;
1506         int if_idx = 0;
1507         int wp_start = cb->args[0];
1508         int if_start = cb->args[1];
1509         struct cfg80211_registered_device *rdev;
1510         struct wireless_dev *wdev;
1511
1512         mutex_lock(&cfg80211_mutex);
1513         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1514                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1515                         continue;
1516                 if (wp_idx < wp_start) {
1517                         wp_idx++;
1518                         continue;
1519                 }
1520                 if_idx = 0;
1521
1522                 mutex_lock(&rdev->devlist_mtx);
1523                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1524                         if (if_idx < if_start) {
1525                                 if_idx++;
1526                                 continue;
1527                         }
1528                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1529                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1530                                                rdev, wdev->netdev) < 0) {
1531                                 mutex_unlock(&rdev->devlist_mtx);
1532                                 goto out;
1533                         }
1534                         if_idx++;
1535                 }
1536                 mutex_unlock(&rdev->devlist_mtx);
1537
1538                 wp_idx++;
1539         }
1540  out:
1541         mutex_unlock(&cfg80211_mutex);
1542
1543         cb->args[0] = wp_idx;
1544         cb->args[1] = if_idx;
1545
1546         return skb->len;
1547 }
1548
1549 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1550 {
1551         struct sk_buff *msg;
1552         struct cfg80211_registered_device *dev = info->user_ptr[0];
1553         struct net_device *netdev = info->user_ptr[1];
1554
1555         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1556         if (!msg)
1557                 return -ENOMEM;
1558
1559         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1560                                dev, netdev) < 0) {
1561                 nlmsg_free(msg);
1562                 return -ENOBUFS;
1563         }
1564
1565         return genlmsg_reply(msg, info);
1566 }
1567
1568 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1569         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1570         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1571         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1572         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1573         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1574 };
1575
1576 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1577 {
1578         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1579         int flag;
1580
1581         *mntrflags = 0;
1582
1583         if (!nla)
1584                 return -EINVAL;
1585
1586         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1587                              nla, mntr_flags_policy))
1588                 return -EINVAL;
1589
1590         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1591                 if (flags[flag])
1592                         *mntrflags |= (1<<flag);
1593
1594         return 0;
1595 }
1596
1597 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1598                                struct net_device *netdev, u8 use_4addr,
1599                                enum nl80211_iftype iftype)
1600 {
1601         if (!use_4addr) {
1602                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1603                         return -EBUSY;
1604                 return 0;
1605         }
1606
1607         switch (iftype) {
1608         case NL80211_IFTYPE_AP_VLAN:
1609                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1610                         return 0;
1611                 break;
1612         case NL80211_IFTYPE_STATION:
1613                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1614                         return 0;
1615                 break;
1616         default:
1617                 break;
1618         }
1619
1620         return -EOPNOTSUPP;
1621 }
1622
1623 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1624 {
1625         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1626         struct vif_params params;
1627         int err;
1628         enum nl80211_iftype otype, ntype;
1629         struct net_device *dev = info->user_ptr[1];
1630         u32 _flags, *flags = NULL;
1631         bool change = false;
1632
1633         memset(&params, 0, sizeof(params));
1634
1635         otype = ntype = dev->ieee80211_ptr->iftype;
1636
1637         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1638                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1639                 if (otype != ntype)
1640                         change = true;
1641                 if (ntype > NL80211_IFTYPE_MAX)
1642                         return -EINVAL;
1643         }
1644
1645         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1646                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1647
1648                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1649                         return -EINVAL;
1650                 if (netif_running(dev))
1651                         return -EBUSY;
1652
1653                 wdev_lock(wdev);
1654                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1655                              IEEE80211_MAX_MESH_ID_LEN);
1656                 wdev->mesh_id_up_len =
1657                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1658                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1659                        wdev->mesh_id_up_len);
1660                 wdev_unlock(wdev);
1661         }
1662
1663         if (info->attrs[NL80211_ATTR_4ADDR]) {
1664                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1665                 change = true;
1666                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1667                 if (err)
1668                         return err;
1669         } else {
1670                 params.use_4addr = -1;
1671         }
1672
1673         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1674                 if (ntype != NL80211_IFTYPE_MONITOR)
1675                         return -EINVAL;
1676                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1677                                           &_flags);
1678                 if (err)
1679                         return err;
1680
1681                 flags = &_flags;
1682                 change = true;
1683         }
1684
1685         if (change)
1686                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1687         else
1688                 err = 0;
1689
1690         if (!err && params.use_4addr != -1)
1691                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1692
1693         return err;
1694 }
1695
1696 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1697 {
1698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1699         struct vif_params params;
1700         struct net_device *dev;
1701         int err;
1702         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1703         u32 flags;
1704
1705         memset(&params, 0, sizeof(params));
1706
1707         if (!info->attrs[NL80211_ATTR_IFNAME])
1708                 return -EINVAL;
1709
1710         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1711                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1712                 if (type > NL80211_IFTYPE_MAX)
1713                         return -EINVAL;
1714         }
1715
1716         if (!rdev->ops->add_virtual_intf ||
1717             !(rdev->wiphy.interface_modes & (1 << type)))
1718                 return -EOPNOTSUPP;
1719
1720         if (info->attrs[NL80211_ATTR_4ADDR]) {
1721                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1722                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1723                 if (err)
1724                         return err;
1725         }
1726
1727         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1728                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1729                                   &flags);
1730         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1731                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1732                 type, err ? NULL : &flags, &params);
1733         if (IS_ERR(dev))
1734                 return PTR_ERR(dev);
1735
1736         if (type == NL80211_IFTYPE_MESH_POINT &&
1737             info->attrs[NL80211_ATTR_MESH_ID]) {
1738                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1739
1740                 wdev_lock(wdev);
1741                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1742                              IEEE80211_MAX_MESH_ID_LEN);
1743                 wdev->mesh_id_up_len =
1744                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1745                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1746                        wdev->mesh_id_up_len);
1747                 wdev_unlock(wdev);
1748         }
1749
1750         return 0;
1751 }
1752
1753 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1754 {
1755         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1756         struct net_device *dev = info->user_ptr[1];
1757
1758         if (!rdev->ops->del_virtual_intf)
1759                 return -EOPNOTSUPP;
1760
1761         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1762 }
1763
1764 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1765 {
1766         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1767         struct net_device *dev = info->user_ptr[1];
1768         u16 noack_map;
1769
1770         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1771                 return -EINVAL;
1772
1773         if (!rdev->ops->set_noack_map)
1774                 return -EOPNOTSUPP;
1775
1776         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1777
1778         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1779 }
1780
1781 struct get_key_cookie {
1782         struct sk_buff *msg;
1783         int error;
1784         int idx;
1785 };
1786
1787 static void get_key_callback(void *c, struct key_params *params)
1788 {
1789         struct nlattr *key;
1790         struct get_key_cookie *cookie = c;
1791
1792         if (params->key)
1793                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1794                         params->key_len, params->key);
1795
1796         if (params->seq)
1797                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1798                         params->seq_len, params->seq);
1799
1800         if (params->cipher)
1801                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1802                             params->cipher);
1803
1804         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1805         if (!key)
1806                 goto nla_put_failure;
1807
1808         if (params->key)
1809                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1810                         params->key_len, params->key);
1811
1812         if (params->seq)
1813                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1814                         params->seq_len, params->seq);
1815
1816         if (params->cipher)
1817                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1818                             params->cipher);
1819
1820         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1821
1822         nla_nest_end(cookie->msg, key);
1823
1824         return;
1825  nla_put_failure:
1826         cookie->error = 1;
1827 }
1828
1829 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1830 {
1831         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1832         int err;
1833         struct net_device *dev = info->user_ptr[1];
1834         u8 key_idx = 0;
1835         const u8 *mac_addr = NULL;
1836         bool pairwise;
1837         struct get_key_cookie cookie = {
1838                 .error = 0,
1839         };
1840         void *hdr;
1841         struct sk_buff *msg;
1842
1843         if (info->attrs[NL80211_ATTR_KEY_IDX])
1844                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1845
1846         if (key_idx > 5)
1847                 return -EINVAL;
1848
1849         if (info->attrs[NL80211_ATTR_MAC])
1850                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1851
1852         pairwise = !!mac_addr;
1853         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1854                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1855                 if (kt >= NUM_NL80211_KEYTYPES)
1856                         return -EINVAL;
1857                 if (kt != NL80211_KEYTYPE_GROUP &&
1858                     kt != NL80211_KEYTYPE_PAIRWISE)
1859                         return -EINVAL;
1860                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1861         }
1862
1863         if (!rdev->ops->get_key)
1864                 return -EOPNOTSUPP;
1865
1866         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1867         if (!msg)
1868                 return -ENOMEM;
1869
1870         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1871                              NL80211_CMD_NEW_KEY);
1872         if (IS_ERR(hdr))
1873                 return PTR_ERR(hdr);
1874
1875         cookie.msg = msg;
1876         cookie.idx = key_idx;
1877
1878         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1879         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1880         if (mac_addr)
1881                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1882
1883         if (pairwise && mac_addr &&
1884             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1885                 return -ENOENT;
1886
1887         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1888                                  mac_addr, &cookie, get_key_callback);
1889
1890         if (err)
1891                 goto free_msg;
1892
1893         if (cookie.error)
1894                 goto nla_put_failure;
1895
1896         genlmsg_end(msg, hdr);
1897         return genlmsg_reply(msg, info);
1898
1899  nla_put_failure:
1900         err = -ENOBUFS;
1901  free_msg:
1902         nlmsg_free(msg);
1903         return err;
1904 }
1905
1906 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1907 {
1908         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1909         struct key_parse key;
1910         int err;
1911         struct net_device *dev = info->user_ptr[1];
1912
1913         err = nl80211_parse_key(info, &key);
1914         if (err)
1915                 return err;
1916
1917         if (key.idx < 0)
1918                 return -EINVAL;
1919
1920         /* only support setting default key */
1921         if (!key.def && !key.defmgmt)
1922                 return -EINVAL;
1923
1924         wdev_lock(dev->ieee80211_ptr);
1925
1926         if (key.def) {
1927                 if (!rdev->ops->set_default_key) {
1928                         err = -EOPNOTSUPP;
1929                         goto out;
1930                 }
1931
1932                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1933                 if (err)
1934                         goto out;
1935
1936                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1937                                                  key.def_uni, key.def_multi);
1938
1939                 if (err)
1940                         goto out;
1941
1942 #ifdef CONFIG_CFG80211_WEXT
1943                 dev->ieee80211_ptr->wext.default_key = key.idx;
1944 #endif
1945         } else {
1946                 if (key.def_uni || !key.def_multi) {
1947                         err = -EINVAL;
1948                         goto out;
1949                 }
1950
1951                 if (!rdev->ops->set_default_mgmt_key) {
1952                         err = -EOPNOTSUPP;
1953                         goto out;
1954                 }
1955
1956                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1957                 if (err)
1958                         goto out;
1959
1960                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1961                                                       dev, key.idx);
1962                 if (err)
1963                         goto out;
1964
1965 #ifdef CONFIG_CFG80211_WEXT
1966                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1967 #endif
1968         }
1969
1970  out:
1971         wdev_unlock(dev->ieee80211_ptr);
1972
1973         return err;
1974 }
1975
1976 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1977 {
1978         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1979         int err;
1980         struct net_device *dev = info->user_ptr[1];
1981         struct key_parse key;
1982         const u8 *mac_addr = NULL;
1983
1984         err = nl80211_parse_key(info, &key);
1985         if (err)
1986                 return err;
1987
1988         if (!key.p.key)
1989                 return -EINVAL;
1990
1991         if (info->attrs[NL80211_ATTR_MAC])
1992                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1993
1994         if (key.type == -1) {
1995                 if (mac_addr)
1996                         key.type = NL80211_KEYTYPE_PAIRWISE;
1997                 else
1998                         key.type = NL80211_KEYTYPE_GROUP;
1999         }
2000
2001         /* for now */
2002         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2003             key.type != NL80211_KEYTYPE_GROUP)
2004                 return -EINVAL;
2005
2006         if (!rdev->ops->add_key)
2007                 return -EOPNOTSUPP;
2008
2009         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2010                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2011                                            mac_addr))
2012                 return -EINVAL;
2013
2014         wdev_lock(dev->ieee80211_ptr);
2015         err = nl80211_key_allowed(dev->ieee80211_ptr);
2016         if (!err)
2017                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2018                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2019                                          mac_addr, &key.p);
2020         wdev_unlock(dev->ieee80211_ptr);
2021
2022         return err;
2023 }
2024
2025 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2026 {
2027         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2028         int err;
2029         struct net_device *dev = info->user_ptr[1];
2030         u8 *mac_addr = NULL;
2031         struct key_parse key;
2032
2033         err = nl80211_parse_key(info, &key);
2034         if (err)
2035                 return err;
2036
2037         if (info->attrs[NL80211_ATTR_MAC])
2038                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2039
2040         if (key.type == -1) {
2041                 if (mac_addr)
2042                         key.type = NL80211_KEYTYPE_PAIRWISE;
2043                 else
2044                         key.type = NL80211_KEYTYPE_GROUP;
2045         }
2046
2047         /* for now */
2048         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2049             key.type != NL80211_KEYTYPE_GROUP)
2050                 return -EINVAL;
2051
2052         if (!rdev->ops->del_key)
2053                 return -EOPNOTSUPP;
2054
2055         wdev_lock(dev->ieee80211_ptr);
2056         err = nl80211_key_allowed(dev->ieee80211_ptr);
2057
2058         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2059             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2060                 err = -ENOENT;
2061
2062         if (!err)
2063                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2064                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2065                                          mac_addr);
2066
2067 #ifdef CONFIG_CFG80211_WEXT
2068         if (!err) {
2069                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2070                         dev->ieee80211_ptr->wext.default_key = -1;
2071                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2072                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2073         }
2074 #endif
2075         wdev_unlock(dev->ieee80211_ptr);
2076
2077         return err;
2078 }
2079
2080 static int nl80211_parse_beacon(struct genl_info *info,
2081                                 struct cfg80211_beacon_data *bcn)
2082 {
2083         bool haveinfo = false;
2084
2085         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2086             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2087             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2088             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2089                 return -EINVAL;
2090
2091         memset(bcn, 0, sizeof(*bcn));
2092
2093         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2094                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2095                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2096                 if (!bcn->head_len)
2097                         return -EINVAL;
2098                 haveinfo = true;
2099         }
2100
2101         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2102                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2103                 bcn->tail_len =
2104                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2105                 haveinfo = true;
2106         }
2107
2108         if (!haveinfo)
2109                 return -EINVAL;
2110
2111         if (info->attrs[NL80211_ATTR_IE]) {
2112                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2113                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2114         }
2115
2116         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2117                 bcn->proberesp_ies =
2118                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2119                 bcn->proberesp_ies_len =
2120                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2121         }
2122
2123         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2124                 bcn->assocresp_ies =
2125                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2126                 bcn->assocresp_ies_len =
2127                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2128         }
2129
2130         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2131                 bcn->probe_resp =
2132                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2133                 bcn->probe_resp_len =
2134                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2135         }
2136
2137         return 0;
2138 }
2139
2140 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2141 {
2142         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2143         struct net_device *dev = info->user_ptr[1];
2144         struct wireless_dev *wdev = dev->ieee80211_ptr;
2145         struct cfg80211_ap_settings params;
2146         int err;
2147
2148         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2149             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2150                 return -EOPNOTSUPP;
2151
2152         if (!rdev->ops->start_ap)
2153                 return -EOPNOTSUPP;
2154
2155         if (wdev->beacon_interval)
2156                 return -EALREADY;
2157
2158         memset(&params, 0, sizeof(params));
2159
2160         /* these are required for START_AP */
2161         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2162             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2163             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2164                 return -EINVAL;
2165
2166         err = nl80211_parse_beacon(info, &params.beacon);
2167         if (err)
2168                 return err;
2169
2170         params.beacon_interval =
2171                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2172         params.dtim_period =
2173                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2174
2175         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2176         if (err)
2177                 return err;
2178
2179         /*
2180          * In theory, some of these attributes should be required here
2181          * but since they were not used when the command was originally
2182          * added, keep them optional for old user space programs to let
2183          * them continue to work with drivers that do not need the
2184          * additional information -- drivers must check!
2185          */
2186         if (info->attrs[NL80211_ATTR_SSID]) {
2187                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2188                 params.ssid_len =
2189                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2190                 if (params.ssid_len == 0 ||
2191                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2192                         return -EINVAL;
2193         }
2194
2195         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2196                 params.hidden_ssid = nla_get_u32(
2197                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2198                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2199                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2200                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2201                         return -EINVAL;
2202         }
2203
2204         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2205
2206         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2207                 params.auth_type = nla_get_u32(
2208                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2209                 if (!nl80211_valid_auth_type(params.auth_type))
2210                         return -EINVAL;
2211         } else
2212                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2213
2214         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2215                                       NL80211_MAX_NR_CIPHER_SUITES);
2216         if (err)
2217                 return err;
2218
2219         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2220                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2221                         return -EOPNOTSUPP;
2222                 params.inactivity_timeout = nla_get_u16(
2223                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2224         }
2225
2226         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2227         if (!err)
2228                 wdev->beacon_interval = params.beacon_interval;
2229         return err;
2230 }
2231
2232 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2233 {
2234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2235         struct net_device *dev = info->user_ptr[1];
2236         struct wireless_dev *wdev = dev->ieee80211_ptr;
2237         struct cfg80211_beacon_data params;
2238         int err;
2239
2240         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2241             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2242                 return -EOPNOTSUPP;
2243
2244         if (!rdev->ops->change_beacon)
2245                 return -EOPNOTSUPP;
2246
2247         if (!wdev->beacon_interval)
2248                 return -EINVAL;
2249
2250         err = nl80211_parse_beacon(info, &params);
2251         if (err)
2252                 return err;
2253
2254         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2255 }
2256
2257 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2258 {
2259         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2260         struct net_device *dev = info->user_ptr[1];
2261         struct wireless_dev *wdev = dev->ieee80211_ptr;
2262         int err;
2263
2264         if (!rdev->ops->stop_ap)
2265                 return -EOPNOTSUPP;
2266
2267         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2268             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2269                 return -EOPNOTSUPP;
2270
2271         if (!wdev->beacon_interval)
2272                 return -ENOENT;
2273
2274         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2275         if (!err)
2276                 wdev->beacon_interval = 0;
2277         return err;
2278 }
2279
2280 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2281         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2282         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2283         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2284         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2285         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2286         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2287 };
2288
2289 static int parse_station_flags(struct genl_info *info,
2290                                enum nl80211_iftype iftype,
2291                                struct station_parameters *params)
2292 {
2293         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2294         struct nlattr *nla;
2295         int flag;
2296
2297         /*
2298          * Try parsing the new attribute first so userspace
2299          * can specify both for older kernels.
2300          */
2301         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2302         if (nla) {
2303                 struct nl80211_sta_flag_update *sta_flags;
2304
2305                 sta_flags = nla_data(nla);
2306                 params->sta_flags_mask = sta_flags->mask;
2307                 params->sta_flags_set = sta_flags->set;
2308                 if ((params->sta_flags_mask |
2309                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2310                         return -EINVAL;
2311                 return 0;
2312         }
2313
2314         /* if present, parse the old attribute */
2315
2316         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2317         if (!nla)
2318                 return 0;
2319
2320         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2321                              nla, sta_flags_policy))
2322                 return -EINVAL;
2323
2324         /*
2325          * Only allow certain flags for interface types so that
2326          * other attributes are silently ignored. Remember that
2327          * this is backward compatibility code with old userspace
2328          * and shouldn't be hit in other cases anyway.
2329          */
2330         switch (iftype) {
2331         case NL80211_IFTYPE_AP:
2332         case NL80211_IFTYPE_AP_VLAN:
2333         case NL80211_IFTYPE_P2P_GO:
2334                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2335                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2336                                          BIT(NL80211_STA_FLAG_WME) |
2337                                          BIT(NL80211_STA_FLAG_MFP);
2338                 break;
2339         case NL80211_IFTYPE_P2P_CLIENT:
2340         case NL80211_IFTYPE_STATION:
2341                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2342                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2343                 break;
2344         case NL80211_IFTYPE_MESH_POINT:
2345                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2346                                          BIT(NL80211_STA_FLAG_MFP) |
2347                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2348         default:
2349                 return -EINVAL;
2350         }
2351
2352         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2353                 if (flags[flag])
2354                         params->sta_flags_set |= (1<<flag);
2355
2356         return 0;
2357 }
2358
2359 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2360                                  int attr)
2361 {
2362         struct nlattr *rate;
2363         u16 bitrate;
2364
2365         rate = nla_nest_start(msg, attr);
2366         if (!rate)
2367                 goto nla_put_failure;
2368
2369         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2370         bitrate = cfg80211_calculate_bitrate(info);
2371         if (bitrate > 0)
2372                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2373
2374         if (info->flags & RATE_INFO_FLAGS_MCS)
2375                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2376         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2377                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2378         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2379                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2380
2381         nla_nest_end(msg, rate);
2382         return true;
2383
2384 nla_put_failure:
2385         return false;
2386 }
2387
2388 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2389                                 int flags, struct net_device *dev,
2390                                 const u8 *mac_addr, struct station_info *sinfo)
2391 {
2392         void *hdr;
2393         struct nlattr *sinfoattr, *bss_param;
2394
2395         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2396         if (!hdr)
2397                 return -1;
2398
2399         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2400         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2401
2402         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2403
2404         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2405         if (!sinfoattr)
2406                 goto nla_put_failure;
2407         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2408                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2409                             sinfo->connected_time);
2410         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2411                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2412                             sinfo->inactive_time);
2413         if (sinfo->filled & STATION_INFO_RX_BYTES)
2414                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2415                             sinfo->rx_bytes);
2416         if (sinfo->filled & STATION_INFO_TX_BYTES)
2417                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2418                             sinfo->tx_bytes);
2419         if (sinfo->filled & STATION_INFO_LLID)
2420                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2421                             sinfo->llid);
2422         if (sinfo->filled & STATION_INFO_PLID)
2423                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2424                             sinfo->plid);
2425         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2426                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2427                             sinfo->plink_state);
2428         if (sinfo->filled & STATION_INFO_SIGNAL)
2429                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2430                            sinfo->signal);
2431         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2432                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2433                            sinfo->signal_avg);
2434         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2435                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2436                                           NL80211_STA_INFO_TX_BITRATE))
2437                         goto nla_put_failure;
2438         }
2439         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2440                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2441                                           NL80211_STA_INFO_RX_BITRATE))
2442                         goto nla_put_failure;
2443         }
2444         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2445                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2446                             sinfo->rx_packets);
2447         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2448                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2449                             sinfo->tx_packets);
2450         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2451                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2452                             sinfo->tx_retries);
2453         if (sinfo->filled & STATION_INFO_TX_FAILED)
2454                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2455                             sinfo->tx_failed);
2456         if (sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT)
2457                 NLA_PUT_U32(msg, NL80211_STA_INFO_BEACON_LOSS,
2458                             sinfo->beacon_loss_count);
2459         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2460                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2461                 if (!bss_param)
2462                         goto nla_put_failure;
2463
2464                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2465                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2466                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2467                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2468                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2469                         NLA_PUT_FLAG(msg,
2470                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2471                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2472                            sinfo->bss_param.dtim_period);
2473                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2474                             sinfo->bss_param.beacon_interval);
2475
2476                 nla_nest_end(msg, bss_param);
2477         }
2478         if (sinfo->filled & STATION_INFO_STA_FLAGS)
2479                 NLA_PUT(msg, NL80211_STA_INFO_STA_FLAGS,
2480                         sizeof(struct nl80211_sta_flag_update),
2481                         &sinfo->sta_flags);
2482         nla_nest_end(msg, sinfoattr);
2483
2484         if (sinfo->filled & STATION_INFO_ASSOC_REQ_IES)
2485                 NLA_PUT(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2486                         sinfo->assoc_req_ies);
2487
2488         return genlmsg_end(msg, hdr);
2489
2490  nla_put_failure:
2491         genlmsg_cancel(msg, hdr);
2492         return -EMSGSIZE;
2493 }
2494
2495 static int nl80211_dump_station(struct sk_buff *skb,
2496                                 struct netlink_callback *cb)
2497 {
2498         struct station_info sinfo;
2499         struct cfg80211_registered_device *dev;
2500         struct net_device *netdev;
2501         u8 mac_addr[ETH_ALEN];
2502         int sta_idx = cb->args[1];
2503         int err;
2504
2505         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2506         if (err)
2507                 return err;
2508
2509         if (!dev->ops->dump_station) {
2510                 err = -EOPNOTSUPP;
2511                 goto out_err;
2512         }
2513
2514         while (1) {
2515                 memset(&sinfo, 0, sizeof(sinfo));
2516                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2517                                              mac_addr, &sinfo);
2518                 if (err == -ENOENT)
2519                         break;
2520                 if (err)
2521                         goto out_err;
2522
2523                 if (nl80211_send_station(skb,
2524                                 NETLINK_CB(cb->skb).pid,
2525                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2526                                 netdev, mac_addr,
2527                                 &sinfo) < 0)
2528                         goto out;
2529
2530                 sta_idx++;
2531         }
2532
2533
2534  out:
2535         cb->args[1] = sta_idx;
2536         err = skb->len;
2537  out_err:
2538         nl80211_finish_netdev_dump(dev);
2539
2540         return err;
2541 }
2542
2543 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2544 {
2545         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2546         struct net_device *dev = info->user_ptr[1];
2547         struct station_info sinfo;
2548         struct sk_buff *msg;
2549         u8 *mac_addr = NULL;
2550         int err;
2551
2552         memset(&sinfo, 0, sizeof(sinfo));
2553
2554         if (!info->attrs[NL80211_ATTR_MAC])
2555                 return -EINVAL;
2556
2557         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2558
2559         if (!rdev->ops->get_station)
2560                 return -EOPNOTSUPP;
2561
2562         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2563         if (err)
2564                 return err;
2565
2566         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2567         if (!msg)
2568                 return -ENOMEM;
2569
2570         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2571                                  dev, mac_addr, &sinfo) < 0) {
2572                 nlmsg_free(msg);
2573                 return -ENOBUFS;
2574         }
2575
2576         return genlmsg_reply(msg, info);
2577 }
2578
2579 /*
2580  * Get vlan interface making sure it is running and on the right wiphy.
2581  */
2582 static struct net_device *get_vlan(struct genl_info *info,
2583                                    struct cfg80211_registered_device *rdev)
2584 {
2585         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2586         struct net_device *v;
2587         int ret;
2588
2589         if (!vlanattr)
2590                 return NULL;
2591
2592         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2593         if (!v)
2594                 return ERR_PTR(-ENODEV);
2595
2596         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2597                 ret = -EINVAL;
2598                 goto error;
2599         }
2600
2601         if (!netif_running(v)) {
2602                 ret = -ENETDOWN;
2603                 goto error;
2604         }
2605
2606         return v;
2607  error:
2608         dev_put(v);
2609         return ERR_PTR(ret);
2610 }
2611
2612 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2613 {
2614         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2615         int err;
2616         struct net_device *dev = info->user_ptr[1];
2617         struct station_parameters params;
2618         u8 *mac_addr = NULL;
2619
2620         memset(&params, 0, sizeof(params));
2621
2622         params.listen_interval = -1;
2623         params.plink_state = -1;
2624
2625         if (info->attrs[NL80211_ATTR_STA_AID])
2626                 return -EINVAL;
2627
2628         if (!info->attrs[NL80211_ATTR_MAC])
2629                 return -EINVAL;
2630
2631         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2632
2633         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2634                 params.supported_rates =
2635                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2636                 params.supported_rates_len =
2637                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2638         }
2639
2640         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2641                 params.listen_interval =
2642                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2643
2644         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2645                 params.ht_capa =
2646                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2647
2648         if (!rdev->ops->change_station)
2649                 return -EOPNOTSUPP;
2650
2651         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2652                 return -EINVAL;
2653
2654         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2655                 params.plink_action =
2656                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2657
2658         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2659                 params.plink_state =
2660                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2661
2662         switch (dev->ieee80211_ptr->iftype) {
2663         case NL80211_IFTYPE_AP:
2664         case NL80211_IFTYPE_AP_VLAN:
2665         case NL80211_IFTYPE_P2P_GO:
2666                 /* disallow mesh-specific things */
2667                 if (params.plink_action)
2668                         return -EINVAL;
2669
2670                 /* TDLS can't be set, ... */
2671                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2672                         return -EINVAL;
2673                 /*
2674                  * ... but don't bother the driver with it. This works around
2675                  * a hostapd/wpa_supplicant issue -- it always includes the
2676                  * TLDS_PEER flag in the mask even for AP mode.
2677                  */
2678                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2679
2680                 /* accept only the listed bits */
2681                 if (params.sta_flags_mask &
2682                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2683                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2684                                   BIT(NL80211_STA_FLAG_WME) |
2685                                   BIT(NL80211_STA_FLAG_MFP)))
2686                         return -EINVAL;
2687
2688                 /* must be last in here for error handling */
2689                 params.vlan = get_vlan(info, rdev);
2690                 if (IS_ERR(params.vlan))
2691                         return PTR_ERR(params.vlan);
2692                 break;
2693         case NL80211_IFTYPE_P2P_CLIENT:
2694         case NL80211_IFTYPE_STATION:
2695                 /*
2696                  * Don't allow userspace to change the TDLS_PEER flag,
2697                  * but silently ignore attempts to change it since we
2698                  * don't have state here to verify that it doesn't try
2699                  * to change the flag.
2700                  */
2701                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2702                 /* fall through */
2703         case NL80211_IFTYPE_ADHOC:
2704                 /* disallow things sta doesn't support */
2705                 if (params.plink_action)
2706                         return -EINVAL;
2707                 if (params.ht_capa)
2708                         return -EINVAL;
2709                 if (params.listen_interval >= 0)
2710                         return -EINVAL;
2711                 /* reject any changes other than AUTHORIZED */
2712                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2713                         return -EINVAL;
2714                 break;
2715         case NL80211_IFTYPE_MESH_POINT:
2716                 /* disallow things mesh doesn't support */
2717                 if (params.vlan)
2718                         return -EINVAL;
2719                 if (params.ht_capa)
2720                         return -EINVAL;
2721                 if (params.listen_interval >= 0)
2722                         return -EINVAL;
2723                 /*
2724                  * No special handling for TDLS here -- the userspace
2725                  * mesh code doesn't have this bug.
2726                  */
2727                 if (params.sta_flags_mask &
2728                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2729                                   BIT(NL80211_STA_FLAG_MFP) |
2730                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2731                         return -EINVAL;
2732                 break;
2733         default:
2734                 return -EOPNOTSUPP;
2735         }
2736
2737         /* be aware of params.vlan when changing code here */
2738
2739         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2740
2741         if (params.vlan)
2742                 dev_put(params.vlan);
2743
2744         return err;
2745 }
2746
2747 static struct nla_policy
2748 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2749         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2750         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2751 };
2752
2753 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2754 {
2755         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2756         int err;
2757         struct net_device *dev = info->user_ptr[1];
2758         struct station_parameters params;
2759         u8 *mac_addr = NULL;
2760
2761         memset(&params, 0, sizeof(params));
2762
2763         if (!info->attrs[NL80211_ATTR_MAC])
2764                 return -EINVAL;
2765
2766         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2767                 return -EINVAL;
2768
2769         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2770                 return -EINVAL;
2771
2772         if (!info->attrs[NL80211_ATTR_STA_AID])
2773                 return -EINVAL;
2774
2775         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2776         params.supported_rates =
2777                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2778         params.supported_rates_len =
2779                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2780         params.listen_interval =
2781                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2782
2783         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2784         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2785                 return -EINVAL;
2786
2787         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2788                 params.ht_capa =
2789                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2790
2791         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2792                 params.plink_action =
2793                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2794
2795         if (!rdev->ops->add_station)
2796                 return -EOPNOTSUPP;
2797
2798         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2799                 return -EINVAL;
2800
2801         switch (dev->ieee80211_ptr->iftype) {
2802         case NL80211_IFTYPE_AP:
2803         case NL80211_IFTYPE_AP_VLAN:
2804         case NL80211_IFTYPE_P2P_GO:
2805                 /* parse WME attributes if sta is WME capable */
2806                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2807                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2808                     info->attrs[NL80211_ATTR_STA_WME]) {
2809                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2810                         struct nlattr *nla;
2811
2812                         nla = info->attrs[NL80211_ATTR_STA_WME];
2813                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2814                                                nl80211_sta_wme_policy);
2815                         if (err)
2816                                 return err;
2817
2818                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2819                                 params.uapsd_queues =
2820                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2821                         if (params.uapsd_queues &
2822                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2823                                 return -EINVAL;
2824
2825                         if (tb[NL80211_STA_WME_MAX_SP])
2826                                 params.max_sp =
2827                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2828
2829                         if (params.max_sp &
2830                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2831                                 return -EINVAL;
2832
2833                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2834                 }
2835                 /* TDLS peers cannot be added */
2836                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2837                         return -EINVAL;
2838                 /* but don't bother the driver with it */
2839                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2840
2841                 /* must be last in here for error handling */
2842                 params.vlan = get_vlan(info, rdev);
2843                 if (IS_ERR(params.vlan))
2844                         return PTR_ERR(params.vlan);
2845                 break;
2846         case NL80211_IFTYPE_MESH_POINT:
2847                 /* TDLS peers cannot be added */
2848                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2849                         return -EINVAL;
2850                 break;
2851         case NL80211_IFTYPE_STATION:
2852                 /* Only TDLS peers can be added */
2853                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2854                         return -EINVAL;
2855                 /* Can only add if TDLS ... */
2856                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
2857                         return -EOPNOTSUPP;
2858                 /* ... with external setup is supported */
2859                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
2860                         return -EOPNOTSUPP;
2861                 break;
2862         default:
2863                 return -EOPNOTSUPP;
2864         }
2865
2866         /* be aware of params.vlan when changing code here */
2867
2868         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2869
2870         if (params.vlan)
2871                 dev_put(params.vlan);
2872         return err;
2873 }
2874
2875 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2876 {
2877         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2878         struct net_device *dev = info->user_ptr[1];
2879         u8 *mac_addr = NULL;
2880
2881         if (info->attrs[NL80211_ATTR_MAC])
2882                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2883
2884         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2885             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2886             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2887             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2888                 return -EINVAL;
2889
2890         if (!rdev->ops->del_station)
2891                 return -EOPNOTSUPP;
2892
2893         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2894 }
2895
2896 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2897                                 int flags, struct net_device *dev,
2898                                 u8 *dst, u8 *next_hop,
2899                                 struct mpath_info *pinfo)
2900 {
2901         void *hdr;
2902         struct nlattr *pinfoattr;
2903
2904         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2905         if (!hdr)
2906                 return -1;
2907
2908         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2909         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2910         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2911
2912         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2913
2914         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2915         if (!pinfoattr)
2916                 goto nla_put_failure;
2917         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2918                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2919                             pinfo->frame_qlen);
2920         if (pinfo->filled & MPATH_INFO_SN)
2921                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2922                             pinfo->sn);
2923         if (pinfo->filled & MPATH_INFO_METRIC)
2924                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2925                             pinfo->metric);
2926         if (pinfo->filled & MPATH_INFO_EXPTIME)
2927                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2928                             pinfo->exptime);
2929         if (pinfo->filled & MPATH_INFO_FLAGS)
2930                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2931                             pinfo->flags);
2932         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2933                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2934                             pinfo->discovery_timeout);
2935         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2936                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2937                             pinfo->discovery_retries);
2938
2939         nla_nest_end(msg, pinfoattr);
2940
2941         return genlmsg_end(msg, hdr);
2942
2943  nla_put_failure:
2944         genlmsg_cancel(msg, hdr);
2945         return -EMSGSIZE;
2946 }
2947
2948 static int nl80211_dump_mpath(struct sk_buff *skb,
2949                               struct netlink_callback *cb)
2950 {
2951         struct mpath_info pinfo;
2952         struct cfg80211_registered_device *dev;
2953         struct net_device *netdev;
2954         u8 dst[ETH_ALEN];
2955         u8 next_hop[ETH_ALEN];
2956         int path_idx = cb->args[1];
2957         int err;
2958
2959         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2960         if (err)
2961                 return err;
2962
2963         if (!dev->ops->dump_mpath) {
2964                 err = -EOPNOTSUPP;
2965                 goto out_err;
2966         }
2967
2968         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2969                 err = -EOPNOTSUPP;
2970                 goto out_err;
2971         }
2972
2973         while (1) {
2974                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2975                                            dst, next_hop, &pinfo);
2976                 if (err == -ENOENT)
2977                         break;
2978                 if (err)
2979                         goto out_err;
2980
2981                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2982                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2983                                        netdev, dst, next_hop,
2984                                        &pinfo) < 0)
2985                         goto out;
2986
2987                 path_idx++;
2988         }
2989
2990
2991  out:
2992         cb->args[1] = path_idx;
2993         err = skb->len;
2994  out_err:
2995         nl80211_finish_netdev_dump(dev);
2996         return err;
2997 }
2998
2999 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3000 {
3001         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3002         int err;
3003         struct net_device *dev = info->user_ptr[1];
3004         struct mpath_info pinfo;
3005         struct sk_buff *msg;
3006         u8 *dst = NULL;
3007         u8 next_hop[ETH_ALEN];
3008
3009         memset(&pinfo, 0, sizeof(pinfo));
3010
3011         if (!info->attrs[NL80211_ATTR_MAC])
3012                 return -EINVAL;
3013
3014         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3015
3016         if (!rdev->ops->get_mpath)
3017                 return -EOPNOTSUPP;
3018
3019         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3020                 return -EOPNOTSUPP;
3021
3022         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3023         if (err)
3024                 return err;
3025
3026         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3027         if (!msg)
3028                 return -ENOMEM;
3029
3030         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3031                                  dev, dst, next_hop, &pinfo) < 0) {
3032                 nlmsg_free(msg);
3033                 return -ENOBUFS;
3034         }
3035
3036         return genlmsg_reply(msg, info);
3037 }
3038
3039 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3040 {
3041         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3042         struct net_device *dev = info->user_ptr[1];
3043         u8 *dst = NULL;
3044         u8 *next_hop = NULL;
3045
3046         if (!info->attrs[NL80211_ATTR_MAC])
3047                 return -EINVAL;
3048
3049         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3050                 return -EINVAL;
3051
3052         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3053         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3054
3055         if (!rdev->ops->change_mpath)
3056                 return -EOPNOTSUPP;
3057
3058         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3059                 return -EOPNOTSUPP;
3060
3061         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3062 }
3063
3064 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3065 {
3066         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3067         struct net_device *dev = info->user_ptr[1];
3068         u8 *dst = NULL;
3069         u8 *next_hop = NULL;
3070
3071         if (!info->attrs[NL80211_ATTR_MAC])
3072                 return -EINVAL;
3073
3074         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3075                 return -EINVAL;
3076
3077         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3078         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3079
3080         if (!rdev->ops->add_mpath)
3081                 return -EOPNOTSUPP;
3082
3083         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3084                 return -EOPNOTSUPP;
3085
3086         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3087 }
3088
3089 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3090 {
3091         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3092         struct net_device *dev = info->user_ptr[1];
3093         u8 *dst = NULL;
3094
3095         if (info->attrs[NL80211_ATTR_MAC])
3096                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3097
3098         if (!rdev->ops->del_mpath)
3099                 return -EOPNOTSUPP;
3100
3101         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3102 }
3103
3104 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3105 {
3106         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3107         struct net_device *dev = info->user_ptr[1];
3108         struct bss_parameters params;
3109
3110         memset(&params, 0, sizeof(params));
3111         /* default to not changing parameters */
3112         params.use_cts_prot = -1;
3113         params.use_short_preamble = -1;
3114         params.use_short_slot_time = -1;
3115         params.ap_isolate = -1;
3116         params.ht_opmode = -1;
3117
3118         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3119                 params.use_cts_prot =
3120                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3121         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3122                 params.use_short_preamble =
3123                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3124         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3125                 params.use_short_slot_time =
3126                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3127         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3128                 params.basic_rates =
3129                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3130                 params.basic_rates_len =
3131                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3132         }
3133         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3134                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3135         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3136                 params.ht_opmode =
3137                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3138
3139         if (!rdev->ops->change_bss)
3140                 return -EOPNOTSUPP;
3141
3142         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3143             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3144                 return -EOPNOTSUPP;
3145
3146         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3147 }
3148
3149 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3150         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3151         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3152         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3153         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3154         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3155         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3156 };
3157
3158 static int parse_reg_rule(struct nlattr *tb[],
3159         struct ieee80211_reg_rule *reg_rule)
3160 {
3161         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3162         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3163
3164         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3165                 return -EINVAL;
3166         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3167                 return -EINVAL;
3168         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3169                 return -EINVAL;
3170         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3171                 return -EINVAL;
3172         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3173                 return -EINVAL;
3174
3175         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3176
3177         freq_range->start_freq_khz =
3178                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3179         freq_range->end_freq_khz =
3180                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3181         freq_range->max_bandwidth_khz =
3182                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3183
3184         power_rule->max_eirp =
3185                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3186
3187         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3188                 power_rule->max_antenna_gain =
3189                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3190
3191         return 0;
3192 }
3193
3194 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3195 {
3196         int r;
3197         char *data = NULL;
3198
3199         /*
3200          * You should only get this when cfg80211 hasn't yet initialized
3201          * completely when built-in to the kernel right between the time
3202          * window between nl80211_init() and regulatory_init(), if that is
3203          * even possible.
3204          */
3205         mutex_lock(&cfg80211_mutex);
3206         if (unlikely(!cfg80211_regdomain)) {
3207                 mutex_unlock(&cfg80211_mutex);
3208                 return -EINPROGRESS;
3209         }
3210         mutex_unlock(&cfg80211_mutex);
3211
3212         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3213                 return -EINVAL;
3214
3215         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3216
3217         r = regulatory_hint_user(data);
3218
3219         return r;
3220 }
3221
3222 static int nl80211_get_mesh_config(struct sk_buff *skb,
3223                                    struct genl_info *info)
3224 {
3225         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3226         struct net_device *dev = info->user_ptr[1];
3227         struct wireless_dev *wdev = dev->ieee80211_ptr;
3228         struct mesh_config cur_params;
3229         int err = 0;
3230         void *hdr;
3231         struct nlattr *pinfoattr;
3232         struct sk_buff *msg;
3233
3234         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3235                 return -EOPNOTSUPP;
3236
3237         if (!rdev->ops->get_mesh_config)
3238                 return -EOPNOTSUPP;
3239
3240         wdev_lock(wdev);
3241         /* If not connected, get default parameters */
3242         if (!wdev->mesh_id_len)
3243                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3244         else
3245                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3246                                                  &cur_params);
3247         wdev_unlock(wdev);
3248
3249         if (err)
3250                 return err;
3251
3252         /* Draw up a netlink message to send back */
3253         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3254         if (!msg)
3255                 return -ENOMEM;
3256         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3257                              NL80211_CMD_GET_MESH_CONFIG);
3258         if (!hdr)
3259                 goto out;
3260         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3261         if (!pinfoattr)
3262                 goto nla_put_failure;
3263         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3264         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3265                         cur_params.dot11MeshRetryTimeout);
3266         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3267                         cur_params.dot11MeshConfirmTimeout);
3268         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3269                         cur_params.dot11MeshHoldingTimeout);
3270         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3271                         cur_params.dot11MeshMaxPeerLinks);
3272         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
3273                         cur_params.dot11MeshMaxRetries);
3274         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
3275                         cur_params.dot11MeshTTL);
3276         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3277                         cur_params.element_ttl);
3278         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3279                         cur_params.auto_open_plinks);
3280         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3281                         cur_params.dot11MeshHWMPmaxPREQretries);
3282         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3283                         cur_params.path_refresh_time);
3284         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3285                         cur_params.min_discovery_timeout);
3286         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3287                         cur_params.dot11MeshHWMPactivePathTimeout);
3288         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3289                         cur_params.dot11MeshHWMPpreqMinInterval);
3290         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3291                         cur_params.dot11MeshHWMPperrMinInterval);
3292         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3293                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
3294         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3295                         cur_params.dot11MeshHWMPRootMode);
3296         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3297                         cur_params.dot11MeshHWMPRannInterval);
3298         NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3299                         cur_params.dot11MeshGateAnnouncementProtocol);
3300         NLA_PUT_U8(msg, NL80211_MESHCONF_FORWARDING,
3301                         cur_params.dot11MeshForwarding);
3302         NLA_PUT_U32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3303                         cur_params.rssi_threshold);
3304         nla_nest_end(msg, pinfoattr);
3305         genlmsg_end(msg, hdr);
3306         return genlmsg_reply(msg, info);
3307
3308  nla_put_failure:
3309         genlmsg_cancel(msg, hdr);
3310  out:
3311         nlmsg_free(msg);
3312         return -ENOBUFS;
3313 }
3314
3315 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3316         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3317         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3318         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3319         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3320         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3321         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3322         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3323         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3324
3325         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3326         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3327         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3328         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3329         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3330         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3331         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3332         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3333         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3334         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3335         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3336         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32},
3337 };
3338
3339 static const struct nla_policy
3340         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3341         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3342         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3343         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3344         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3345                 .len = IEEE80211_MAX_DATA_LEN },
3346         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3347 };
3348
3349 static int nl80211_parse_mesh_config(struct genl_info *info,
3350                                      struct mesh_config *cfg,
3351                                      u32 *mask_out)
3352 {
3353         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3354         u32 mask = 0;
3355
3356 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3357 do {\
3358         if (table[attr_num]) {\
3359                 cfg->param = nla_fn(table[attr_num]); \
3360                 mask |= (1 << (attr_num - 1)); \
3361         } \
3362 } while (0);\
3363
3364
3365         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3366                 return -EINVAL;
3367         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3368                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3369                              nl80211_meshconf_params_policy))
3370                 return -EINVAL;
3371
3372         /* This makes sure that there aren't more than 32 mesh config
3373          * parameters (otherwise our bitfield scheme would not work.) */
3374         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3375
3376         /* Fill in the params struct */
3377         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3378                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3379         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3380                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3381         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3382                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3383         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3384                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3385         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3386                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3387         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3388                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3389         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3390                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3391         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3392                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3393         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3394                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3395                         nla_get_u8);
3396         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3397                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3398         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3399                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3400                         nla_get_u16);
3401         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3402                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3403                         nla_get_u32);
3404         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3405                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3406                         nla_get_u16);
3407         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3408                         mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3409                         nla_get_u16);
3410         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3411                         dot11MeshHWMPnetDiameterTraversalTime,
3412                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3413                         nla_get_u16);
3414         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3415                         dot11MeshHWMPRootMode, mask,
3416                         NL80211_MESHCONF_HWMP_ROOTMODE,
3417                         nla_get_u8);
3418         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3419                         dot11MeshHWMPRannInterval, mask,
3420                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3421                         nla_get_u16);
3422         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3423                         dot11MeshGateAnnouncementProtocol, mask,
3424                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3425                         nla_get_u8);
3426         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3427                         mask, NL80211_MESHCONF_FORWARDING, nla_get_u8);
3428         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3429                         mask, NL80211_MESHCONF_RSSI_THRESHOLD, nla_get_u32);
3430         if (mask_out)
3431                 *mask_out = mask;
3432
3433         return 0;
3434
3435 #undef FILL_IN_MESH_PARAM_IF_SET
3436 }
3437
3438 static int nl80211_parse_mesh_setup(struct genl_info *info,
3439                                      struct mesh_setup *setup)
3440 {
3441         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3442
3443         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3444                 return -EINVAL;
3445         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3446                              info->attrs[NL80211_ATTR_MESH_SETUP],
3447                              nl80211_mesh_setup_params_policy))
3448                 return -EINVAL;
3449
3450         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3451                 setup->path_sel_proto =
3452                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3453                  IEEE80211_PATH_PROTOCOL_VENDOR :
3454                  IEEE80211_PATH_PROTOCOL_HWMP;
3455
3456         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3457                 setup->path_metric =
3458                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3459                  IEEE80211_PATH_METRIC_VENDOR :
3460                  IEEE80211_PATH_METRIC_AIRTIME;
3461
3462
3463         if (tb[NL80211_MESH_SETUP_IE]) {
3464                 struct nlattr *ieattr =
3465                         tb[NL80211_MESH_SETUP_IE];
3466                 if (!is_valid_ie_attr(ieattr))
3467                         return -EINVAL;
3468                 setup->ie = nla_data(ieattr);
3469                 setup->ie_len = nla_len(ieattr);
3470         }
3471         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3472         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3473
3474         return 0;
3475 }
3476
3477 static int nl80211_update_mesh_config(struct sk_buff *skb,
3478                                       struct genl_info *info)
3479 {
3480         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3481         struct net_device *dev = info->user_ptr[1];
3482         struct wireless_dev *wdev = dev->ieee80211_ptr;
3483         struct mesh_config cfg;
3484         u32 mask;
3485         int err;
3486
3487         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3488                 return -EOPNOTSUPP;
3489
3490         if (!rdev->ops->update_mesh_config)
3491                 return -EOPNOTSUPP;
3492
3493         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3494         if (err)
3495                 return err;
3496
3497         wdev_lock(wdev);
3498         if (!wdev->mesh_id_len)
3499                 err = -ENOLINK;
3500
3501         if (!err)
3502                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3503                                                     mask, &cfg);
3504
3505         wdev_unlock(wdev);
3506
3507         return err;
3508 }
3509
3510 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3511 {
3512         struct sk_buff *msg;
3513         void *hdr = NULL;
3514         struct nlattr *nl_reg_rules;
3515         unsigned int i;
3516         int err = -EINVAL;
3517
3518         mutex_lock(&cfg80211_mutex);
3519
3520         if (!cfg80211_regdomain)
3521                 goto out;
3522
3523         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3524         if (!msg) {
3525                 err = -ENOBUFS;
3526                 goto out;
3527         }
3528
3529         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3530                              NL80211_CMD_GET_REG);
3531         if (!hdr)
3532                 goto put_failure;
3533
3534         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3535                 cfg80211_regdomain->alpha2);
3536         if (cfg80211_regdomain->dfs_region)
3537                 NLA_PUT_U8(msg, NL80211_ATTR_DFS_REGION,
3538                            cfg80211_regdomain->dfs_region);
3539
3540         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3541         if (!nl_reg_rules)
3542                 goto nla_put_failure;
3543
3544         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3545                 struct nlattr *nl_reg_rule;
3546                 const struct ieee80211_reg_rule *reg_rule;
3547                 const struct ieee80211_freq_range *freq_range;
3548                 const struct ieee80211_power_rule *power_rule;
3549
3550                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3551                 freq_range = &reg_rule->freq_range;
3552                 power_rule = &reg_rule->power_rule;
3553
3554                 nl_reg_rule = nla_nest_start(msg, i);
3555                 if (!nl_reg_rule)
3556                         goto nla_put_failure;
3557
3558                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3559                         reg_rule->flags);
3560                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3561                         freq_range->start_freq_khz);
3562                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3563                         freq_range->end_freq_khz);
3564                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3565                         freq_range->max_bandwidth_khz);
3566                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3567                         power_rule->max_antenna_gain);
3568                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3569                         power_rule->max_eirp);
3570
3571                 nla_nest_end(msg, nl_reg_rule);
3572         }
3573
3574         nla_nest_end(msg, nl_reg_rules);
3575
3576         genlmsg_end(msg, hdr);
3577         err = genlmsg_reply(msg, info);
3578         goto out;
3579
3580 nla_put_failure:
3581         genlmsg_cancel(msg, hdr);
3582 put_failure:
3583         nlmsg_free(msg);
3584         err = -EMSGSIZE;
3585 out:
3586         mutex_unlock(&cfg80211_mutex);
3587         return err;
3588 }
3589
3590 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3591 {
3592         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3593         struct nlattr *nl_reg_rule;
3594         char *alpha2 = NULL;
3595         int rem_reg_rules = 0, r = 0;
3596         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3597         u8 dfs_region = 0;
3598         struct ieee80211_regdomain *rd = NULL;
3599
3600         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3601                 return -EINVAL;
3602
3603         if (!info->attrs[NL80211_ATTR_REG_RULES])
3604                 return -EINVAL;
3605
3606         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3607
3608         if (info->attrs[NL80211_ATTR_DFS_REGION])
3609                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3610
3611         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3612                         rem_reg_rules) {
3613                 num_rules++;
3614                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3615                         return -EINVAL;
3616         }
3617
3618         mutex_lock(&cfg80211_mutex);
3619
3620         if (!reg_is_valid_request(alpha2)) {
3621                 r = -EINVAL;
3622                 goto bad_reg;
3623         }
3624
3625         size_of_regd = sizeof(struct ieee80211_regdomain) +
3626                 (num_rules * sizeof(struct ieee80211_reg_rule));
3627
3628         rd = kzalloc(size_of_regd, GFP_KERNEL);
3629         if (!rd) {
3630                 r = -ENOMEM;
3631                 goto bad_reg;
3632         }
3633
3634         rd->n_reg_rules = num_rules;
3635         rd->alpha2[0] = alpha2[0];
3636         rd->alpha2[1] = alpha2[1];
3637
3638         /*
3639          * Disable DFS master mode if the DFS region was
3640          * not supported or known on this kernel.
3641          */
3642         if (reg_supported_dfs_region(dfs_region))
3643                 rd->dfs_region = dfs_region;
3644
3645         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3646                         rem_reg_rules) {
3647                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3648                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3649                         reg_rule_policy);
3650                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3651                 if (r)
3652                         goto bad_reg;
3653
3654                 rule_idx++;
3655
3656                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3657                         r = -EINVAL;
3658                         goto bad_reg;
3659                 }
3660         }
3661
3662         BUG_ON(rule_idx != num_rules);
3663
3664         r = set_regdom(rd);
3665
3666         mutex_unlock(&cfg80211_mutex);
3667
3668         return r;
3669
3670  bad_reg:
3671         mutex_unlock(&cfg80211_mutex);
3672         kfree(rd);
3673         return r;
3674 }
3675
3676 static int validate_scan_freqs(struct nlattr *freqs)
3677 {
3678         struct nlattr *attr1, *attr2;
3679         int n_channels = 0, tmp1, tmp2;
3680
3681         nla_for_each_nested(attr1, freqs, tmp1) {
3682                 n_channels++;
3683                 /*
3684                  * Some hardware has a limited channel list for
3685                  * scanning, and it is pretty much nonsensical
3686                  * to scan for a channel twice, so disallow that
3687                  * and don't require drivers to check that the
3688                  * channel list they get isn't longer than what
3689                  * they can scan, as long as they can scan all
3690                  * the channels they registered at once.
3691                  */
3692                 nla_for_each_nested(attr2, freqs, tmp2)
3693                         if (attr1 != attr2 &&
3694                             nla_get_u32(attr1) == nla_get_u32(attr2))
3695                                 return 0;
3696         }
3697
3698         return n_channels;
3699 }
3700
3701 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3702 {
3703         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3704         struct net_device *dev = info->user_ptr[1];
3705         struct cfg80211_scan_request *request;
3706         struct nlattr *attr;
3707         struct wiphy *wiphy;
3708         int err, tmp, n_ssids = 0, n_channels, i;
3709         size_t ie_len;
3710
3711         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3712                 return -EINVAL;
3713
3714         wiphy = &rdev->wiphy;
3715
3716         if (!rdev->ops->scan)
3717                 return -EOPNOTSUPP;
3718
3719         if (rdev->scan_req)
3720                 return -EBUSY;
3721
3722         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3723                 n_channels = validate_scan_freqs(
3724                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3725                 if (!n_channels)
3726                         return -EINVAL;
3727         } else {
3728                 enum ieee80211_band band;
3729                 n_channels = 0;
3730
3731                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3732                         if (wiphy->bands[band])
3733                                 n_channels += wiphy->bands[band]->n_channels;
3734         }
3735
3736         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3737                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3738                         n_ssids++;
3739
3740         if (n_ssids > wiphy->max_scan_ssids)
3741                 return -EINVAL;
3742
3743         if (info->attrs[NL80211_ATTR_IE])
3744                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3745         else
3746                 ie_len = 0;
3747
3748         if (ie_len > wiphy->max_scan_ie_len)
3749                 return -EINVAL;
3750
3751         request = kzalloc(sizeof(*request)
3752                         + sizeof(*request->ssids) * n_ssids
3753                         + sizeof(*request->channels) * n_channels
3754                         + ie_len, GFP_KERNEL);
3755         if (!request)
3756                 return -ENOMEM;
3757
3758         if (n_ssids)
3759                 request->ssids = (void *)&request->channels[n_channels];
3760         request->n_ssids = n_ssids;
3761         if (ie_len) {
3762                 if (request->ssids)
3763                         request->ie = (void *)(request->ssids + n_ssids);
3764                 else
3765                         request->ie = (void *)(request->channels + n_channels);
3766         }
3767
3768         i = 0;
3769         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3770                 /* user specified, bail out if channel not found */
3771                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3772                         struct ieee80211_channel *chan;
3773
3774                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3775
3776                         if (!chan) {
3777                                 err = -EINVAL;
3778                                 goto out_free;
3779                         }
3780
3781                         /* ignore disabled channels */
3782                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3783                                 continue;
3784
3785                         request->channels[i] = chan;
3786                         i++;
3787                 }
3788         } else {
3789                 enum ieee80211_band band;
3790
3791                 /* all channels */
3792                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3793                         int j;
3794                         if (!wiphy->bands[band])
3795                                 continue;
3796                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3797                                 struct ieee80211_channel *chan;
3798
3799                                 chan = &wiphy->bands[band]->channels[j];
3800
3801                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3802                                         continue;
3803
3804                                 request->channels[i] = chan;
3805                                 i++;
3806                         }
3807                 }
3808         }
3809
3810         if (!i) {
3811                 err = -EINVAL;
3812                 goto out_free;
3813         }
3814
3815         request->n_channels = i;
3816
3817         i = 0;
3818         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3819                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3820                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3821                                 err = -EINVAL;
3822                                 goto out_free;
3823                         }
3824                         request->ssids[i].ssid_len = nla_len(attr);
3825                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3826                         i++;
3827                 }
3828         }
3829
3830         if (info->attrs[NL80211_ATTR_IE]) {
3831                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3832                 memcpy((void *)request->ie,
3833                        nla_data(info->attrs[NL80211_ATTR_IE]),
3834                        request->ie_len);
3835         }
3836
3837         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3838                 if (wiphy->bands[i])
3839                         request->rates[i] =
3840                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3841
3842         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3843                 nla_for_each_nested(attr,
3844                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3845                                     tmp) {
3846                         enum ieee80211_band band = nla_type(attr);
3847
3848                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3849                                 err = -EINVAL;
3850                                 goto out_free;
3851                         }
3852                         err = ieee80211_get_ratemask(wiphy->bands[band],
3853                                                      nla_data(attr),
3854                                                      nla_len(attr),
3855                                                      &request->rates[band]);
3856                         if (err)
3857                                 goto out_free;
3858                 }
3859         }
3860
3861         request->no_cck =
3862                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3863
3864         request->dev = dev;
3865         request->wiphy = &rdev->wiphy;
3866
3867         rdev->scan_req = request;
3868         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3869
3870         if (!err) {
3871                 nl80211_send_scan_start(rdev, dev);
3872                 dev_hold(dev);
3873         } else {
3874  out_free:
3875                 rdev->scan_req = NULL;
3876                 kfree(request);
3877         }
3878
3879         return err;
3880 }
3881
3882 static int nl80211_start_sched_scan(struct sk_buff *skb,
3883                                     struct genl_info *info)
3884 {
3885         struct cfg80211_sched_scan_request *request;
3886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3887         struct net_device *dev = info->user_ptr[1];
3888         struct nlattr *attr;
3889         struct wiphy *wiphy;
3890         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
3891         u32 interval;
3892         enum ieee80211_band band;
3893         size_t ie_len;
3894         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
3895
3896         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3897             !rdev->ops->sched_scan_start)
3898                 return -EOPNOTSUPP;
3899
3900         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3901                 return -EINVAL;
3902
3903         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3904                 return -EINVAL;
3905
3906         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3907         if (interval == 0)
3908                 return -EINVAL;
3909
3910         wiphy = &rdev->wiphy;
3911
3912         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3913                 n_channels = validate_scan_freqs(
3914                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3915                 if (!n_channels)
3916                         return -EINVAL;
3917         } else {
3918                 n_channels = 0;
3919
3920                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3921                         if (wiphy->bands[band])
3922                                 n_channels += wiphy->bands[band]->n_channels;
3923         }
3924
3925         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3926                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3927                                     tmp)
3928                         n_ssids++;
3929
3930         if (n_ssids > wiphy->max_sched_scan_ssids)
3931                 return -EINVAL;
3932
3933         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
3934                 nla_for_each_nested(attr,
3935                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3936                                     tmp)
3937                         n_match_sets++;
3938
3939         if (n_match_sets > wiphy->max_match_sets)
3940                 return -EINVAL;
3941
3942         if (info->attrs[NL80211_ATTR_IE])
3943                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3944         else
3945                 ie_len = 0;
3946
3947         if (ie_len > wiphy->max_sched_scan_ie_len)
3948                 return -EINVAL;
3949
3950         mutex_lock(&rdev->sched_scan_mtx);
3951
3952         if (rdev->sched_scan_req) {
3953                 err = -EINPROGRESS;
3954                 goto out;
3955         }
3956
3957         request = kzalloc(sizeof(*request)
3958                         + sizeof(*request->ssids) * n_ssids
3959                         + sizeof(*request->match_sets) * n_match_sets
3960                         + sizeof(*request->channels) * n_channels
3961                         + ie_len, GFP_KERNEL);
3962         if (!request) {
3963                 err = -ENOMEM;
3964                 goto out;
3965         }
3966
3967         if (n_ssids)
3968                 request->ssids = (void *)&request->channels[n_channels];
3969         request->n_ssids = n_ssids;
3970         if (ie_len) {
3971                 if (request->ssids)
3972                         request->ie = (void *)(request->ssids + n_ssids);
3973                 else
3974                         request->ie = (void *)(request->channels + n_channels);
3975         }
3976
3977         if (n_match_sets) {
3978                 if (request->ie)
3979                         request->match_sets = (void *)(request->ie + ie_len);
3980                 else if (request->ssids)
3981                         request->match_sets =
3982                                 (void *)(request->ssids + n_ssids);
3983                 else
3984                         request->match_sets =
3985                                 (void *)(request->channels + n_channels);
3986         }
3987         request->n_match_sets = n_match_sets;
3988
3989         i = 0;
3990         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3991                 /* user specified, bail out if channel not found */
3992                 nla_for_each_nested(attr,
3993                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
3994                                     tmp) {
3995                         struct ieee80211_channel *chan;
3996
3997                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3998
3999                         if (!chan) {
4000                                 err = -EINVAL;
4001                                 goto out_free;
4002                         }
4003
4004                         /* ignore disabled channels */
4005                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4006                                 continue;
4007
4008                         request->channels[i] = chan;
4009                         i++;
4010                 }
4011         } else {
4012                 /* all channels */
4013                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4014                         int j;
4015                         if (!wiphy->bands[band])
4016                                 continue;
4017                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4018                                 struct ieee80211_channel *chan;
4019
4020                                 chan = &wiphy->bands[band]->channels[j];
4021
4022                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4023                                         continue;
4024
4025                                 request->channels[i] = chan;
4026                                 i++;
4027                         }
4028                 }
4029         }
4030
4031         if (!i) {
4032                 err = -EINVAL;
4033                 goto out_free;
4034         }
4035
4036         request->n_channels = i;
4037
4038         i = 0;
4039         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4040                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4041                                     tmp) {
4042                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4043                                 err = -EINVAL;
4044                                 goto out_free;
4045                         }
4046                         request->ssids[i].ssid_len = nla_len(attr);
4047                         memcpy(request->ssids[i].ssid, nla_data(attr),
4048                                nla_len(attr));
4049                         i++;
4050                 }
4051         }
4052
4053         i = 0;
4054         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4055                 nla_for_each_nested(attr,
4056                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4057                                     tmp) {
4058                         struct nlattr *ssid;
4059
4060                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4061                                   nla_data(attr), nla_len(attr),
4062                                   nl80211_match_policy);
4063                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
4064                         if (ssid) {
4065                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4066                                         err = -EINVAL;
4067                                         goto out_free;
4068                                 }
4069                                 memcpy(request->match_sets[i].ssid.ssid,
4070                                        nla_data(ssid), nla_len(ssid));
4071                                 request->match_sets[i].ssid.ssid_len =
4072                                         nla_len(ssid);
4073                         }
4074                         i++;
4075                 }
4076         }
4077
4078         if (info->attrs[NL80211_ATTR_IE]) {
4079                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4080                 memcpy((void *)request->ie,
4081                        nla_data(info->attrs[NL80211_ATTR_IE]),
4082                        request->ie_len);
4083         }
4084
4085         request->dev = dev;
4086         request->wiphy = &rdev->wiphy;
4087         request->interval = interval;
4088
4089         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4090         if (!err) {
4091                 rdev->sched_scan_req = request;
4092                 nl80211_send_sched_scan(rdev, dev,
4093                                         NL80211_CMD_START_SCHED_SCAN);
4094                 goto out;
4095         }
4096
4097 out_free:
4098         kfree(request);
4099 out:
4100         mutex_unlock(&rdev->sched_scan_mtx);
4101         return err;
4102 }
4103
4104 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4105                                    struct genl_info *info)
4106 {
4107         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4108         int err;
4109
4110         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4111             !rdev->ops->sched_scan_stop)
4112                 return -EOPNOTSUPP;
4113
4114         mutex_lock(&rdev->sched_scan_mtx);
4115         err = __cfg80211_stop_sched_scan(rdev, false);
4116         mutex_unlock(&rdev->sched_scan_mtx);
4117
4118         return err;
4119 }
4120
4121 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4122                             u32 seq, int flags,
4123                             struct cfg80211_registered_device *rdev,
4124                             struct wireless_dev *wdev,
4125                             struct cfg80211_internal_bss *intbss)
4126 {
4127         struct cfg80211_bss *res = &intbss->pub;
4128         void *hdr;
4129         struct nlattr *bss;
4130
4131         ASSERT_WDEV_LOCK(wdev);
4132
4133         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4134                              NL80211_CMD_NEW_SCAN_RESULTS);
4135         if (!hdr)
4136                 return -1;
4137
4138         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4139
4140         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
4141         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
4142
4143         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4144         if (!bss)
4145                 goto nla_put_failure;
4146         if (!is_zero_ether_addr(res->bssid))
4147                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
4148         if (res->information_elements && res->len_information_elements)
4149                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4150                         res->len_information_elements,
4151                         res->information_elements);
4152         if (res->beacon_ies && res->len_beacon_ies &&
4153             res->beacon_ies != res->information_elements)
4154                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
4155                         res->len_beacon_ies, res->beacon_ies);
4156         if (res->tsf)
4157                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
4158         if (res->beacon_interval)
4159                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
4160         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
4161         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
4162         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
4163                 jiffies_to_msecs(jiffies - intbss->ts));
4164
4165         switch (rdev->wiphy.signal_type) {
4166         case CFG80211_SIGNAL_TYPE_MBM:
4167                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
4168                 break;
4169         case CFG80211_SIGNAL_TYPE_UNSPEC:
4170                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
4171                 break;
4172         default:
4173                 break;
4174         }
4175
4176         switch (wdev->iftype) {
4177         case NL80211_IFTYPE_P2P_CLIENT:
4178         case NL80211_IFTYPE_STATION:
4179                 if (intbss == wdev->current_bss)
4180                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4181                                     NL80211_BSS_STATUS_ASSOCIATED);
4182                 break;
4183         case NL80211_IFTYPE_ADHOC:
4184                 if (intbss == wdev->current_bss)
4185                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4186                                     NL80211_BSS_STATUS_IBSS_JOINED);
4187                 break;
4188         default:
4189                 break;
4190         }
4191
4192         nla_nest_end(msg, bss);
4193
4194         return genlmsg_end(msg, hdr);
4195
4196  nla_put_failure:
4197         genlmsg_cancel(msg, hdr);
4198         return -EMSGSIZE;
4199 }
4200
4201 static int nl80211_dump_scan(struct sk_buff *skb,
4202                              struct netlink_callback *cb)
4203 {
4204         struct cfg80211_registered_device *rdev;
4205         struct net_device *dev;
4206         struct cfg80211_internal_bss *scan;
4207         struct wireless_dev *wdev;
4208         int start = cb->args[1], idx = 0;
4209         int err;
4210
4211         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4212         if (err)
4213                 return err;
4214
4215         wdev = dev->ieee80211_ptr;
4216
4217         wdev_lock(wdev);
4218         spin_lock_bh(&rdev->bss_lock);
4219         cfg80211_bss_expire(rdev);
4220
4221         cb->seq = rdev->bss_generation;
4222
4223         list_for_each_entry(scan, &rdev->bss_list, list) {
4224                 if (++idx <= start)
4225                         continue;
4226                 if (nl80211_send_bss(skb, cb,
4227                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4228                                 rdev, wdev, scan) < 0) {
4229                         idx--;
4230                         break;
4231                 }
4232         }
4233
4234         spin_unlock_bh(&rdev->bss_lock);
4235         wdev_unlock(wdev);
4236
4237         cb->args[1] = idx;
4238         nl80211_finish_netdev_dump(rdev);
4239
4240         return skb->len;
4241 }
4242
4243 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4244                                 int flags, struct net_device *dev,
4245                                 struct survey_info *survey)
4246 {
4247         void *hdr;
4248         struct nlattr *infoattr;
4249
4250         hdr = nl80211hdr_put(msg, pid, seq, flags,
4251                              NL80211_CMD_NEW_SURVEY_RESULTS);
4252         if (!hdr)
4253                 return -ENOMEM;
4254
4255         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
4256
4257         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4258         if (!infoattr)
4259                 goto nla_put_failure;
4260
4261         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4262                     survey->channel->center_freq);
4263         if (survey->filled & SURVEY_INFO_NOISE_DBM)
4264                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
4265                             survey->noise);
4266         if (survey->filled & SURVEY_INFO_IN_USE)
4267                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
4268         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
4269                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4270                             survey->channel_time);
4271         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
4272                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4273                             survey->channel_time_busy);
4274         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
4275                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4276                             survey->channel_time_ext_busy);
4277         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
4278                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4279                             survey->channel_time_rx);
4280         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
4281                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4282                             survey->channel_time_tx);
4283
4284         nla_nest_end(msg, infoattr);
4285
4286         return genlmsg_end(msg, hdr);
4287
4288  nla_put_failure:
4289         genlmsg_cancel(msg, hdr);
4290         return -EMSGSIZE;
4291 }
4292
4293 static int nl80211_dump_survey(struct sk_buff *skb,
4294                         struct netlink_callback *cb)
4295 {
4296         struct survey_info survey;
4297         struct cfg80211_registered_device *dev;
4298         struct net_device *netdev;
4299         int survey_idx = cb->args[1];
4300         int res;
4301
4302         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4303         if (res)
4304                 return res;
4305
4306         if (!dev->ops->dump_survey) {
4307                 res = -EOPNOTSUPP;
4308                 goto out_err;
4309         }
4310
4311         while (1) {
4312                 struct ieee80211_channel *chan;
4313
4314                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4315                                             &survey);
4316                 if (res == -ENOENT)
4317                         break;
4318                 if (res)
4319                         goto out_err;
4320
4321                 /* Survey without a channel doesn't make sense */
4322                 if (!survey.channel) {
4323                         res = -EINVAL;
4324                         goto out;
4325                 }
4326
4327                 chan = ieee80211_get_channel(&dev->wiphy,
4328                                              survey.channel->center_freq);
4329                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4330                         survey_idx++;
4331                         continue;
4332                 }
4333
4334                 if (nl80211_send_survey(skb,
4335                                 NETLINK_CB(cb->skb).pid,
4336                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4337                                 netdev,
4338                                 &survey) < 0)
4339                         goto out;
4340                 survey_idx++;
4341         }
4342
4343  out:
4344         cb->args[1] = survey_idx;
4345         res = skb->len;
4346  out_err:
4347         nl80211_finish_netdev_dump(dev);
4348         return res;
4349 }
4350
4351 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4352 {
4353         return auth_type <= NL80211_AUTHTYPE_MAX;
4354 }
4355
4356 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4357 {
4358         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4359                                   NL80211_WPA_VERSION_2));
4360 }
4361
4362 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4363 {
4364         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4365         struct net_device *dev = info->user_ptr[1];
4366         struct ieee80211_channel *chan;
4367         const u8 *bssid, *ssid, *ie = NULL;
4368         int err, ssid_len, ie_len = 0;
4369         enum nl80211_auth_type auth_type;
4370         struct key_parse key;
4371         bool local_state_change;
4372
4373         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4374                 return -EINVAL;
4375
4376         if (!info->attrs[NL80211_ATTR_MAC])
4377                 return -EINVAL;
4378
4379         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4380                 return -EINVAL;
4381
4382         if (!info->attrs[NL80211_ATTR_SSID])
4383                 return -EINVAL;
4384
4385         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4386                 return -EINVAL;
4387
4388         err = nl80211_parse_key(info, &key);
4389         if (err)
4390                 return err;
4391
4392         if (key.idx >= 0) {
4393                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4394                         return -EINVAL;
4395                 if (!key.p.key || !key.p.key_len)
4396                         return -EINVAL;
4397                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4398                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4399                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4400                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4401                         return -EINVAL;
4402                 if (key.idx > 4)
4403                         return -EINVAL;
4404         } else {
4405                 key.p.key_len = 0;
4406                 key.p.key = NULL;
4407         }
4408
4409         if (key.idx >= 0) {
4410                 int i;
4411                 bool ok = false;
4412                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4413                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4414                                 ok = true;
4415                                 break;
4416                         }
4417                 }
4418                 if (!ok)
4419                         return -EINVAL;
4420         }
4421
4422         if (!rdev->ops->auth)
4423                 return -EOPNOTSUPP;
4424
4425         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4426             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4427                 return -EOPNOTSUPP;
4428
4429         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4430         chan = ieee80211_get_channel(&rdev->wiphy,
4431                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4432         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4433                 return -EINVAL;
4434
4435         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4436         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4437
4438         if (info->attrs[NL80211_ATTR_IE]) {
4439                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4440                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4441         }
4442
4443         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4444         if (!nl80211_valid_auth_type(auth_type))
4445                 return -EINVAL;
4446
4447         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4448
4449         /*
4450          * Since we no longer track auth state, ignore
4451          * requests to only change local state.
4452          */
4453         if (local_state_change)
4454                 return 0;
4455
4456         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4457                                   ssid, ssid_len, ie, ie_len,
4458                                   key.p.key, key.p.key_len, key.idx);
4459 }
4460
4461 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4462                                    struct genl_info *info,
4463                                    struct cfg80211_crypto_settings *settings,
4464                                    int cipher_limit)
4465 {
4466         memset(settings, 0, sizeof(*settings));
4467
4468         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4469
4470         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4471                 u16 proto;
4472                 proto = nla_get_u16(
4473                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4474                 settings->control_port_ethertype = cpu_to_be16(proto);
4475                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4476                     proto != ETH_P_PAE)
4477                         return -EINVAL;
4478                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4479                         settings->control_port_no_encrypt = true;
4480         } else
4481                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4482
4483         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4484                 void *data;
4485                 int len, i;
4486
4487                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4488                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4489                 settings->n_ciphers_pairwise = len / sizeof(u32);
4490
4491                 if (len % sizeof(u32))
4492                         return -EINVAL;
4493
4494                 if (settings->n_ciphers_pairwise > cipher_limit)
4495                         return -EINVAL;
4496
4497                 memcpy(settings->ciphers_pairwise, data, len);
4498
4499                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4500                         if (!cfg80211_supported_cipher_suite(
4501                                         &rdev->wiphy,
4502                                         settings->ciphers_pairwise[i]))
4503                                 return -EINVAL;
4504         }
4505
4506         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4507                 settings->cipher_group =
4508                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4509                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4510                                                      settings->cipher_group))
4511                         return -EINVAL;
4512         }
4513
4514         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4515                 settings->wpa_versions =
4516                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4517                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4518                         return -EINVAL;
4519         }
4520
4521         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4522                 void *data;
4523                 int len;
4524
4525                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4526                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4527                 settings->n_akm_suites = len / sizeof(u32);
4528
4529                 if (len % sizeof(u32))
4530                         return -EINVAL;
4531
4532                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4533                         return -EINVAL;
4534
4535                 memcpy(settings->akm_suites, data, len);
4536         }
4537
4538         return 0;
4539 }
4540
4541 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4542 {
4543         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4544         struct net_device *dev = info->user_ptr[1];
4545         struct cfg80211_crypto_settings crypto;
4546         struct ieee80211_channel *chan;
4547         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4548         int err, ssid_len, ie_len = 0;
4549         bool use_mfp = false;
4550         u32 flags = 0;
4551         struct ieee80211_ht_cap *ht_capa = NULL;
4552         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4553
4554         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4555                 return -EINVAL;
4556
4557         if (!info->attrs[NL80211_ATTR_MAC] ||
4558             !info->attrs[NL80211_ATTR_SSID] ||
4559             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4560                 return -EINVAL;
4561
4562         if (!rdev->ops->assoc)
4563                 return -EOPNOTSUPP;
4564
4565         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4566             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4567                 return -EOPNOTSUPP;
4568
4569         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4570
4571         chan = ieee80211_get_channel(&rdev->wiphy,
4572                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4573         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4574                 return -EINVAL;
4575
4576         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4577         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4578
4579         if (info->attrs[NL80211_ATTR_IE]) {
4580                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4581                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4582         }
4583
4584         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4585                 enum nl80211_mfp mfp =
4586                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4587                 if (mfp == NL80211_MFP_REQUIRED)
4588                         use_mfp = true;
4589                 else if (mfp != NL80211_MFP_NO)
4590                         return -EINVAL;
4591         }
4592
4593         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4594                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4595
4596         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4597                 flags |= ASSOC_REQ_DISABLE_HT;
4598
4599         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4600                 ht_capa_mask =
4601                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4602
4603         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4604                 if (!ht_capa_mask)
4605                         return -EINVAL;
4606                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4607         }
4608
4609         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4610         if (!err)
4611                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4612                                           ssid, ssid_len, ie, ie_len, use_mfp,
4613                                           &crypto, flags, ht_capa,
4614                                           ht_capa_mask);
4615
4616         return err;
4617 }
4618
4619 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4620 {
4621         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4622         struct net_device *dev = info->user_ptr[1];
4623         const u8 *ie = NULL, *bssid;
4624         int ie_len = 0;
4625         u16 reason_code;
4626         bool local_state_change;
4627
4628         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4629                 return -EINVAL;
4630
4631         if (!info->attrs[NL80211_ATTR_MAC])
4632                 return -EINVAL;
4633
4634         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4635                 return -EINVAL;
4636
4637         if (!rdev->ops->deauth)
4638                 return -EOPNOTSUPP;
4639
4640         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4641             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4642                 return -EOPNOTSUPP;
4643
4644         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4645
4646         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4647         if (reason_code == 0) {
4648                 /* Reason Code 0 is reserved */
4649                 return -EINVAL;
4650         }
4651
4652         if (info->attrs[NL80211_ATTR_IE]) {
4653                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4654                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4655         }
4656
4657         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4658
4659         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4660                                     local_state_change);
4661 }
4662
4663 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4664 {
4665         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4666         struct net_device *dev = info->user_ptr[1];
4667         const u8 *ie = NULL, *bssid;
4668         int ie_len = 0;
4669         u16 reason_code;
4670         bool local_state_change;
4671
4672         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4673                 return -EINVAL;
4674
4675         if (!info->attrs[NL80211_ATTR_MAC])
4676                 return -EINVAL;
4677
4678         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4679                 return -EINVAL;
4680
4681         if (!rdev->ops->disassoc)
4682                 return -EOPNOTSUPP;
4683
4684         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4685             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4686                 return -EOPNOTSUPP;
4687
4688         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4689
4690         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4691         if (reason_code == 0) {
4692                 /* Reason Code 0 is reserved */
4693                 return -EINVAL;
4694         }
4695
4696         if (info->attrs[NL80211_ATTR_IE]) {
4697                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4698                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4699         }
4700
4701         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4702
4703         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4704                                       local_state_change);
4705 }
4706
4707 static bool
4708 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4709                          int mcast_rate[IEEE80211_NUM_BANDS],
4710                          int rateval)
4711 {
4712         struct wiphy *wiphy = &rdev->wiphy;
4713         bool found = false;
4714         int band, i;
4715
4716         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4717                 struct ieee80211_supported_band *sband;
4718
4719                 sband = wiphy->bands[band];
4720                 if (!sband)
4721                         continue;
4722
4723                 for (i = 0; i < sband->n_bitrates; i++) {
4724                         if (sband->bitrates[i].bitrate == rateval) {
4725                                 mcast_rate[band] = i + 1;
4726                                 found = true;
4727                                 break;
4728                         }
4729                 }
4730         }
4731
4732         return found;
4733 }
4734
4735 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4736 {
4737         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4738         struct net_device *dev = info->user_ptr[1];
4739         struct cfg80211_ibss_params ibss;
4740         struct wiphy *wiphy;
4741         struct cfg80211_cached_keys *connkeys = NULL;
4742         int err;
4743
4744         memset(&ibss, 0, sizeof(ibss));
4745
4746         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4747                 return -EINVAL;
4748
4749         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4750             !info->attrs[NL80211_ATTR_SSID] ||
4751             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4752                 return -EINVAL;
4753
4754         ibss.beacon_interval = 100;
4755
4756         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4757                 ibss.beacon_interval =
4758                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4759                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4760                         return -EINVAL;
4761         }
4762
4763         if (!rdev->ops->join_ibss)
4764                 return -EOPNOTSUPP;
4765
4766         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4767                 return -EOPNOTSUPP;
4768
4769         wiphy = &rdev->wiphy;
4770
4771         if (info->attrs[NL80211_ATTR_MAC]) {
4772                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4773
4774                 if (!is_valid_ether_addr(ibss.bssid))
4775                         return -EINVAL;
4776         }
4777         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4778         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4779
4780         if (info->attrs[NL80211_ATTR_IE]) {
4781                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4782                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4783         }
4784
4785         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4786                 enum nl80211_channel_type channel_type;
4787
4788                 channel_type = nla_get_u32(
4789                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4790                 if (channel_type != NL80211_CHAN_NO_HT &&
4791                     channel_type != NL80211_CHAN_HT20 &&
4792                     channel_type != NL80211_CHAN_HT40MINUS &&
4793                     channel_type != NL80211_CHAN_HT40PLUS)
4794                         return -EINVAL;
4795
4796                 if (channel_type != NL80211_CHAN_NO_HT &&
4797                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
4798                         return -EINVAL;
4799
4800                 ibss.channel_type = channel_type;
4801         } else {
4802                 ibss.channel_type = NL80211_CHAN_NO_HT;
4803         }
4804
4805         ibss.channel = rdev_freq_to_chan(rdev,
4806                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
4807                 ibss.channel_type);
4808         if (!ibss.channel ||
4809             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4810             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4811                 return -EINVAL;
4812
4813         /* Both channels should be able to initiate communication */
4814         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
4815              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
4816             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
4817                                           ibss.channel_type))
4818                 return -EINVAL;
4819
4820         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4821         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4822
4823         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4824                 u8 *rates =
4825                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4826                 int n_rates =
4827                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4828                 struct ieee80211_supported_band *sband =
4829                         wiphy->bands[ibss.channel->band];
4830
4831                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4832                                              &ibss.basic_rates);
4833                 if (err)
4834                         return err;
4835         }
4836
4837         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4838             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4839                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4840                 return -EINVAL;
4841
4842         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4843                 connkeys = nl80211_parse_connkeys(rdev,
4844                                         info->attrs[NL80211_ATTR_KEYS]);
4845                 if (IS_ERR(connkeys))
4846                         return PTR_ERR(connkeys);
4847         }
4848
4849         ibss.control_port =
4850                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
4851
4852         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4853         if (err)
4854                 kfree(connkeys);
4855         return err;
4856 }
4857
4858 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4859 {
4860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4861         struct net_device *dev = info->user_ptr[1];
4862
4863         if (!rdev->ops->leave_ibss)
4864                 return -EOPNOTSUPP;
4865
4866         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4867                 return -EOPNOTSUPP;
4868
4869         return cfg80211_leave_ibss(rdev, dev, false);
4870 }
4871
4872 #ifdef CONFIG_NL80211_TESTMODE
4873 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4874         .name = "testmode",
4875 };
4876
4877 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4878 {
4879         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4880         int err;
4881
4882         if (!info->attrs[NL80211_ATTR_TESTDATA])
4883                 return -EINVAL;
4884
4885         err = -EOPNOTSUPP;
4886         if (rdev->ops->testmode_cmd) {
4887                 rdev->testmode_info = info;
4888                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4889                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4890                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4891                 rdev->testmode_info = NULL;
4892         }
4893
4894         return err;
4895 }
4896
4897 static int nl80211_testmode_dump(struct sk_buff *skb,
4898                                  struct netlink_callback *cb)
4899 {
4900         struct cfg80211_registered_device *rdev;
4901         int err;
4902         long phy_idx;
4903         void *data = NULL;
4904         int data_len = 0;
4905
4906         if (cb->args[0]) {
4907                 /*
4908                  * 0 is a valid index, but not valid for args[0],
4909                  * so we need to offset by 1.
4910                  */
4911                 phy_idx = cb->args[0] - 1;
4912         } else {
4913                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
4914                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
4915                                   nl80211_policy);
4916                 if (err)
4917                         return err;
4918                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
4919                         phy_idx = nla_get_u32(
4920                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
4921                 } else {
4922                         struct net_device *netdev;
4923
4924                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
4925                                                       nl80211_fam.attrbuf,
4926                                                       &rdev, &netdev);
4927                         if (err)
4928                                 return err;
4929                         dev_put(netdev);
4930                         phy_idx = rdev->wiphy_idx;
4931                         cfg80211_unlock_rdev(rdev);
4932                 }
4933                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
4934                         cb->args[1] =
4935                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
4936         }
4937
4938         if (cb->args[1]) {
4939                 data = nla_data((void *)cb->args[1]);
4940                 data_len = nla_len((void *)cb->args[1]);
4941         }
4942
4943         mutex_lock(&cfg80211_mutex);
4944         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
4945         if (!rdev) {
4946                 mutex_unlock(&cfg80211_mutex);
4947                 return -ENOENT;
4948         }
4949         cfg80211_lock_rdev(rdev);
4950         mutex_unlock(&cfg80211_mutex);
4951
4952         if (!rdev->ops->testmode_dump) {
4953                 err = -EOPNOTSUPP;
4954                 goto out_err;
4955         }
4956
4957         while (1) {
4958                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
4959                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4960                                            NL80211_CMD_TESTMODE);
4961                 struct nlattr *tmdata;
4962
4963                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx) < 0) {
4964                         genlmsg_cancel(skb, hdr);
4965                         break;
4966                 }
4967
4968                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4969                 if (!tmdata) {
4970                         genlmsg_cancel(skb, hdr);
4971                         break;
4972                 }
4973                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
4974                                                data, data_len);
4975                 nla_nest_end(skb, tmdata);
4976
4977                 if (err == -ENOBUFS || err == -ENOENT) {
4978                         genlmsg_cancel(skb, hdr);
4979                         break;
4980                 } else if (err) {
4981                         genlmsg_cancel(skb, hdr);
4982                         goto out_err;
4983                 }
4984
4985                 genlmsg_end(skb, hdr);
4986         }
4987
4988         err = skb->len;
4989         /* see above */
4990         cb->args[0] = phy_idx + 1;
4991  out_err:
4992         cfg80211_unlock_rdev(rdev);
4993         return err;
4994 }
4995
4996 static struct sk_buff *
4997 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4998                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4999 {
5000         struct sk_buff *skb;
5001         void *hdr;
5002         struct nlattr *data;
5003
5004         skb = nlmsg_new(approxlen + 100, gfp);
5005         if (!skb)
5006                 return NULL;
5007
5008         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5009         if (!hdr) {
5010                 kfree_skb(skb);
5011                 return NULL;
5012         }
5013
5014         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5015         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5016
5017         ((void **)skb->cb)[0] = rdev;
5018         ((void **)skb->cb)[1] = hdr;
5019         ((void **)skb->cb)[2] = data;
5020
5021         return skb;
5022
5023  nla_put_failure:
5024         kfree_skb(skb);
5025         return NULL;
5026 }
5027
5028 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5029                                                   int approxlen)
5030 {
5031         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5032
5033         if (WARN_ON(!rdev->testmode_info))
5034                 return NULL;
5035
5036         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5037                                 rdev->testmode_info->snd_pid,
5038                                 rdev->testmode_info->snd_seq,
5039                                 GFP_KERNEL);
5040 }
5041 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5042
5043 int cfg80211_testmode_reply(struct sk_buff *skb)
5044 {
5045         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5046         void *hdr = ((void **)skb->cb)[1];
5047         struct nlattr *data = ((void **)skb->cb)[2];
5048
5049         if (WARN_ON(!rdev->testmode_info)) {
5050                 kfree_skb(skb);
5051                 return -EINVAL;
5052         }
5053
5054         nla_nest_end(skb, data);
5055         genlmsg_end(skb, hdr);
5056         return genlmsg_reply(skb, rdev->testmode_info);
5057 }
5058 EXPORT_SYMBOL(cfg80211_testmode_reply);
5059
5060 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5061                                                   int approxlen, gfp_t gfp)
5062 {
5063         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5064
5065         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5066 }
5067 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5068
5069 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5070 {
5071         void *hdr = ((void **)skb->cb)[1];
5072         struct nlattr *data = ((void **)skb->cb)[2];
5073
5074         nla_nest_end(skb, data);
5075         genlmsg_end(skb, hdr);
5076         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5077 }
5078 EXPORT_SYMBOL(cfg80211_testmode_event);
5079 #endif
5080
5081 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5082 {
5083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5084         struct net_device *dev = info->user_ptr[1];
5085         struct cfg80211_connect_params connect;
5086         struct wiphy *wiphy;
5087         struct cfg80211_cached_keys *connkeys = NULL;
5088         int err;
5089
5090         memset(&connect, 0, sizeof(connect));
5091
5092         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5093                 return -EINVAL;
5094
5095         if (!info->attrs[NL80211_ATTR_SSID] ||
5096             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5097                 return -EINVAL;
5098
5099         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5100                 connect.auth_type =
5101                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5102                 if (!nl80211_valid_auth_type(connect.auth_type))
5103                         return -EINVAL;
5104         } else
5105                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5106
5107         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5108
5109         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5110                                       NL80211_MAX_NR_CIPHER_SUITES);
5111         if (err)
5112                 return err;
5113
5114         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5115             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5116                 return -EOPNOTSUPP;
5117
5118         wiphy = &rdev->wiphy;
5119
5120         connect.bg_scan_period = -1;
5121         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5122                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5123                 connect.bg_scan_period =
5124                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5125         }
5126
5127         if (info->attrs[NL80211_ATTR_MAC])
5128                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5129         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5130         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5131
5132         if (info->attrs[NL80211_ATTR_IE]) {
5133                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5134                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5135         }
5136
5137         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5138                 connect.channel =
5139                         ieee80211_get_channel(wiphy,
5140                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5141                 if (!connect.channel ||
5142                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5143                         return -EINVAL;
5144         }
5145
5146         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5147                 connkeys = nl80211_parse_connkeys(rdev,
5148                                         info->attrs[NL80211_ATTR_KEYS]);
5149                 if (IS_ERR(connkeys))
5150                         return PTR_ERR(connkeys);
5151         }
5152
5153         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5154                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5155
5156         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5157                 memcpy(&connect.ht_capa_mask,
5158                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5159                        sizeof(connect.ht_capa_mask));
5160
5161         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5162                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5163                         return -EINVAL;
5164                 memcpy(&connect.ht_capa,
5165                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5166                        sizeof(connect.ht_capa));
5167         }
5168
5169         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5170         if (err)
5171                 kfree(connkeys);
5172         return err;
5173 }
5174
5175 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5176 {
5177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5178         struct net_device *dev = info->user_ptr[1];
5179         u16 reason;
5180
5181         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5182                 reason = WLAN_REASON_DEAUTH_LEAVING;
5183         else
5184                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5185
5186         if (reason == 0)
5187                 return -EINVAL;
5188
5189         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5190             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5191                 return -EOPNOTSUPP;
5192
5193         return cfg80211_disconnect(rdev, dev, reason, true);
5194 }
5195
5196 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5197 {
5198         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5199         struct net *net;
5200         int err;
5201         u32 pid;
5202
5203         if (!info->attrs[NL80211_ATTR_PID])
5204                 return -EINVAL;
5205
5206         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5207
5208         net = get_net_ns_by_pid(pid);
5209         if (IS_ERR(net))
5210                 return PTR_ERR(net);
5211
5212         err = 0;
5213
5214         /* check if anything to do */
5215         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5216                 err = cfg80211_switch_netns(rdev, net);
5217
5218         put_net(net);
5219         return err;
5220 }
5221
5222 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5223 {
5224         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5225         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5226                         struct cfg80211_pmksa *pmksa) = NULL;
5227         struct net_device *dev = info->user_ptr[1];
5228         struct cfg80211_pmksa pmksa;
5229
5230         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5231
5232         if (!info->attrs[NL80211_ATTR_MAC])
5233                 return -EINVAL;
5234
5235         if (!info->attrs[NL80211_ATTR_PMKID])
5236                 return -EINVAL;
5237
5238         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5239         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5240
5241         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5242             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5243                 return -EOPNOTSUPP;
5244
5245         switch (info->genlhdr->cmd) {
5246         case NL80211_CMD_SET_PMKSA:
5247                 rdev_ops = rdev->ops->set_pmksa;
5248                 break;
5249         case NL80211_CMD_DEL_PMKSA:
5250                 rdev_ops = rdev->ops->del_pmksa;
5251                 break;
5252         default:
5253                 WARN_ON(1);
5254                 break;
5255         }
5256
5257         if (!rdev_ops)
5258                 return -EOPNOTSUPP;
5259
5260         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5261 }
5262
5263 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5264 {
5265         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5266         struct net_device *dev = info->user_ptr[1];
5267
5268         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5269             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5270                 return -EOPNOTSUPP;
5271
5272         if (!rdev->ops->flush_pmksa)
5273                 return -EOPNOTSUPP;
5274
5275         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5276 }
5277
5278 static int nl80211_tdls_mgmt(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         u8 action_code, dialog_token;
5283         u16 status_code;
5284         u8 *peer;
5285
5286         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5287             !rdev->ops->tdls_mgmt)
5288                 return -EOPNOTSUPP;
5289
5290         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5291             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5292             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5293             !info->attrs[NL80211_ATTR_IE] ||
5294             !info->attrs[NL80211_ATTR_MAC])
5295                 return -EINVAL;
5296
5297         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5298         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5299         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5300         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5301
5302         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5303                                     dialog_token, status_code,
5304                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5305                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5306 }
5307
5308 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5309 {
5310         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5311         struct net_device *dev = info->user_ptr[1];
5312         enum nl80211_tdls_operation operation;
5313         u8 *peer;
5314
5315         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5316             !rdev->ops->tdls_oper)
5317                 return -EOPNOTSUPP;
5318
5319         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5320             !info->attrs[NL80211_ATTR_MAC])
5321                 return -EINVAL;
5322
5323         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5324         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5325
5326         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5327 }
5328
5329 static int nl80211_remain_on_channel(struct sk_buff *skb,
5330                                      struct genl_info *info)
5331 {
5332         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5333         struct net_device *dev = info->user_ptr[1];
5334         struct ieee80211_channel *chan;
5335         struct sk_buff *msg;
5336         void *hdr;
5337         u64 cookie;
5338         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5339         u32 freq, duration;
5340         int err;
5341
5342         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5343             !info->attrs[NL80211_ATTR_DURATION])
5344                 return -EINVAL;
5345
5346         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5347
5348         /*
5349          * We should be on that channel for at least one jiffie,
5350          * and more than 5 seconds seems excessive.
5351          */
5352         if (!duration || !msecs_to_jiffies(duration) ||
5353             duration > rdev->wiphy.max_remain_on_channel_duration)
5354                 return -EINVAL;
5355
5356         if (!rdev->ops->remain_on_channel ||
5357             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5358                 return -EOPNOTSUPP;
5359
5360         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5361                 channel_type = nla_get_u32(
5362                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5363                 if (channel_type != NL80211_CHAN_NO_HT &&
5364                     channel_type != NL80211_CHAN_HT20 &&
5365                     channel_type != NL80211_CHAN_HT40PLUS &&
5366                     channel_type != NL80211_CHAN_HT40MINUS)
5367                         return -EINVAL;
5368         }
5369
5370         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5371         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5372         if (chan == NULL)
5373                 return -EINVAL;
5374
5375         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5376         if (!msg)
5377                 return -ENOMEM;
5378
5379         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5380                              NL80211_CMD_REMAIN_ON_CHANNEL);
5381
5382         if (IS_ERR(hdr)) {
5383                 err = PTR_ERR(hdr);
5384                 goto free_msg;
5385         }
5386
5387         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5388                                            channel_type, duration, &cookie);
5389
5390         if (err)
5391                 goto free_msg;
5392
5393         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5394
5395         genlmsg_end(msg, hdr);
5396
5397         return genlmsg_reply(msg, info);
5398
5399  nla_put_failure:
5400         err = -ENOBUFS;
5401  free_msg:
5402         nlmsg_free(msg);
5403         return err;
5404 }
5405
5406 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5407                                             struct genl_info *info)
5408 {
5409         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5410         struct net_device *dev = info->user_ptr[1];
5411         u64 cookie;
5412
5413         if (!info->attrs[NL80211_ATTR_COOKIE])
5414                 return -EINVAL;
5415
5416         if (!rdev->ops->cancel_remain_on_channel)
5417                 return -EOPNOTSUPP;
5418
5419         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5420
5421         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5422 }
5423
5424 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5425                            u8 *rates, u8 rates_len)
5426 {
5427         u8 i;
5428         u32 mask = 0;
5429
5430         for (i = 0; i < rates_len; i++) {
5431                 int rate = (rates[i] & 0x7f) * 5;
5432                 int ridx;
5433                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5434                         struct ieee80211_rate *srate =
5435                                 &sband->bitrates[ridx];
5436                         if (rate == srate->bitrate) {
5437                                 mask |= 1 << ridx;
5438                                 break;
5439                         }
5440                 }
5441                 if (ridx == sband->n_bitrates)
5442                         return 0; /* rate not found */
5443         }
5444
5445         return mask;
5446 }
5447
5448 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5449                                u8 *rates, u8 rates_len,
5450                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5451 {
5452         u8 i;
5453
5454         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5455
5456         for (i = 0; i < rates_len; i++) {
5457                 int ridx, rbit;
5458
5459                 ridx = rates[i] / 8;
5460                 rbit = BIT(rates[i] % 8);
5461
5462                 /* check validity */
5463                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5464                         return false;
5465
5466                 /* check availability */
5467                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5468                         mcs[ridx] |= rbit;
5469                 else
5470                         return false;
5471         }
5472
5473         return true;
5474 }
5475
5476 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5477         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5478                                     .len = NL80211_MAX_SUPP_RATES },
5479         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5480                                  .len = NL80211_MAX_SUPP_HT_RATES },
5481 };
5482
5483 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5484                                        struct genl_info *info)
5485 {
5486         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5488         struct cfg80211_bitrate_mask mask;
5489         int rem, i;
5490         struct net_device *dev = info->user_ptr[1];
5491         struct nlattr *tx_rates;
5492         struct ieee80211_supported_band *sband;
5493
5494         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5495                 return -EINVAL;
5496
5497         if (!rdev->ops->set_bitrate_mask)
5498                 return -EOPNOTSUPP;
5499
5500         memset(&mask, 0, sizeof(mask));
5501         /* Default to all rates enabled */
5502         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5503                 sband = rdev->wiphy.bands[i];
5504                 mask.control[i].legacy =
5505                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5506                 if (sband)
5507                         memcpy(mask.control[i].mcs,
5508                                sband->ht_cap.mcs.rx_mask,
5509                                sizeof(mask.control[i].mcs));
5510                 else
5511                         memset(mask.control[i].mcs, 0,
5512                                sizeof(mask.control[i].mcs));
5513         }
5514
5515         /*
5516          * The nested attribute uses enum nl80211_band as the index. This maps
5517          * directly to the enum ieee80211_band values used in cfg80211.
5518          */
5519         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5520         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5521         {
5522                 enum ieee80211_band band = nla_type(tx_rates);
5523                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5524                         return -EINVAL;
5525                 sband = rdev->wiphy.bands[band];
5526                 if (sband == NULL)
5527                         return -EINVAL;
5528                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5529                           nla_len(tx_rates), nl80211_txattr_policy);
5530                 if (tb[NL80211_TXRATE_LEGACY]) {
5531                         mask.control[band].legacy = rateset_to_mask(
5532                                 sband,
5533                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5534                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5535                 }
5536                 if (tb[NL80211_TXRATE_MCS]) {
5537                         if (!ht_rateset_to_mask(
5538                                         sband,
5539                                         nla_data(tb[NL80211_TXRATE_MCS]),
5540                                         nla_len(tb[NL80211_TXRATE_MCS]),
5541                                         mask.control[band].mcs))
5542                                 return -EINVAL;
5543                 }
5544
5545                 if (mask.control[band].legacy == 0) {
5546                         /* don't allow empty legacy rates if HT
5547                          * is not even supported. */
5548                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5549                                 return -EINVAL;
5550
5551                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5552                                 if (mask.control[band].mcs[i])
5553                                         break;
5554
5555                         /* legacy and mcs rates may not be both empty */
5556                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5557                                 return -EINVAL;
5558                 }
5559         }
5560
5561         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5562 }
5563
5564 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5565 {
5566         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5567         struct net_device *dev = info->user_ptr[1];
5568         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5569
5570         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5571                 return -EINVAL;
5572
5573         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5574                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5575
5576         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5577             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5578             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5579             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5580             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5581             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5582             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5583                 return -EOPNOTSUPP;
5584
5585         /* not much point in registering if we can't reply */
5586         if (!rdev->ops->mgmt_tx)
5587                 return -EOPNOTSUPP;
5588
5589         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5590                         frame_type,
5591                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5592                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5593 }
5594
5595 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5596 {
5597         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5598         struct net_device *dev = info->user_ptr[1];
5599         struct ieee80211_channel *chan;
5600         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5601         bool channel_type_valid = false;
5602         u32 freq;
5603         int err;
5604         void *hdr = NULL;
5605         u64 cookie;
5606         struct sk_buff *msg = NULL;
5607         unsigned int wait = 0;
5608         bool offchan, no_cck, dont_wait_for_ack;
5609
5610         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5611
5612         if (!info->attrs[NL80211_ATTR_FRAME] ||
5613             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5614                 return -EINVAL;
5615
5616         if (!rdev->ops->mgmt_tx)
5617                 return -EOPNOTSUPP;
5618
5619         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5620             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5621             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5622             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5623             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5624             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5625             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5626                 return -EOPNOTSUPP;
5627
5628         if (info->attrs[NL80211_ATTR_DURATION]) {
5629                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5630                         return -EINVAL;
5631                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5632         }
5633
5634         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5635                 channel_type = nla_get_u32(
5636                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5637                 if (channel_type != NL80211_CHAN_NO_HT &&
5638                     channel_type != NL80211_CHAN_HT20 &&
5639                     channel_type != NL80211_CHAN_HT40PLUS &&
5640                     channel_type != NL80211_CHAN_HT40MINUS)
5641                         return -EINVAL;
5642                 channel_type_valid = true;
5643         }
5644
5645         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5646
5647         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5648                 return -EINVAL;
5649
5650         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5651
5652         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5653         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5654         if (chan == NULL)
5655                 return -EINVAL;
5656
5657         if (!dont_wait_for_ack) {
5658                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5659                 if (!msg)
5660                         return -ENOMEM;
5661
5662                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5663                                      NL80211_CMD_FRAME);
5664
5665                 if (IS_ERR(hdr)) {
5666                         err = PTR_ERR(hdr);
5667                         goto free_msg;
5668                 }
5669         }
5670
5671         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5672                                     channel_type_valid, wait,
5673                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5674                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5675                                     no_cck, dont_wait_for_ack, &cookie);
5676         if (err)
5677                 goto free_msg;
5678
5679         if (msg) {
5680                 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5681
5682                 genlmsg_end(msg, hdr);
5683                 return genlmsg_reply(msg, info);
5684         }
5685
5686         return 0;
5687
5688  nla_put_failure:
5689         err = -ENOBUFS;
5690  free_msg:
5691         nlmsg_free(msg);
5692         return err;
5693 }
5694
5695 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5696 {
5697         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5698         struct net_device *dev = info->user_ptr[1];
5699         u64 cookie;
5700
5701         if (!info->attrs[NL80211_ATTR_COOKIE])
5702                 return -EINVAL;
5703
5704         if (!rdev->ops->mgmt_tx_cancel_wait)
5705                 return -EOPNOTSUPP;
5706
5707         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5708             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5709             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5710             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5711             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5712             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5713                 return -EOPNOTSUPP;
5714
5715         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5716
5717         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5718 }
5719
5720 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5721 {
5722         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5723         struct wireless_dev *wdev;
5724         struct net_device *dev = info->user_ptr[1];
5725         u8 ps_state;
5726         bool state;
5727         int err;
5728
5729         if (!info->attrs[NL80211_ATTR_PS_STATE])
5730                 return -EINVAL;
5731
5732         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5733
5734         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5735                 return -EINVAL;
5736
5737         wdev = dev->ieee80211_ptr;
5738
5739         if (!rdev->ops->set_power_mgmt)
5740                 return -EOPNOTSUPP;
5741
5742         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5743
5744         if (state == wdev->ps)
5745                 return 0;
5746
5747         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5748                                         wdev->ps_timeout);
5749         if (!err)
5750                 wdev->ps = state;
5751         return err;
5752 }
5753
5754 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5755 {
5756         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5757         enum nl80211_ps_state ps_state;
5758         struct wireless_dev *wdev;
5759         struct net_device *dev = info->user_ptr[1];
5760         struct sk_buff *msg;
5761         void *hdr;
5762         int err;
5763
5764         wdev = dev->ieee80211_ptr;
5765
5766         if (!rdev->ops->set_power_mgmt)
5767                 return -EOPNOTSUPP;
5768
5769         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5770         if (!msg)
5771                 return -ENOMEM;
5772
5773         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5774                              NL80211_CMD_GET_POWER_SAVE);
5775         if (!hdr) {
5776                 err = -ENOBUFS;
5777                 goto free_msg;
5778         }
5779
5780         if (wdev->ps)
5781                 ps_state = NL80211_PS_ENABLED;
5782         else
5783                 ps_state = NL80211_PS_DISABLED;
5784
5785         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5786
5787         genlmsg_end(msg, hdr);
5788         return genlmsg_reply(msg, info);
5789
5790  nla_put_failure:
5791         err = -ENOBUFS;
5792  free_msg:
5793         nlmsg_free(msg);
5794         return err;
5795 }
5796
5797 static struct nla_policy
5798 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5799         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5800         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5801         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5802 };
5803
5804 static int nl80211_set_cqm_rssi(struct genl_info *info,
5805                                 s32 threshold, u32 hysteresis)
5806 {
5807         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5808         struct wireless_dev *wdev;
5809         struct net_device *dev = info->user_ptr[1];
5810
5811         if (threshold > 0)
5812                 return -EINVAL;
5813
5814         wdev = dev->ieee80211_ptr;
5815
5816         if (!rdev->ops->set_cqm_rssi_config)
5817                 return -EOPNOTSUPP;
5818
5819         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5820             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5821                 return -EOPNOTSUPP;
5822
5823         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5824                                               threshold, hysteresis);
5825 }
5826
5827 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5828 {
5829         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5830         struct nlattr *cqm;
5831         int err;
5832
5833         cqm = info->attrs[NL80211_ATTR_CQM];
5834         if (!cqm) {
5835                 err = -EINVAL;
5836                 goto out;
5837         }
5838
5839         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5840                                nl80211_attr_cqm_policy);
5841         if (err)
5842                 goto out;
5843
5844         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5845             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5846                 s32 threshold;
5847                 u32 hysteresis;
5848                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5849                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5850                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5851         } else
5852                 err = -EINVAL;
5853
5854 out:
5855         return err;
5856 }
5857
5858 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5859 {
5860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5861         struct net_device *dev = info->user_ptr[1];
5862         struct mesh_config cfg;
5863         struct mesh_setup setup;
5864         int err;
5865
5866         /* start with default */
5867         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5868         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5869
5870         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5871                 /* and parse parameters if given */
5872                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5873                 if (err)
5874                         return err;
5875         }
5876
5877         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5878             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5879                 return -EINVAL;
5880
5881         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5882         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5883
5884         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5885             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
5886                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5887                         return -EINVAL;
5888
5889         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5890                 /* parse additional setup parameters if given */
5891                 err = nl80211_parse_mesh_setup(info, &setup);
5892                 if (err)
5893                         return err;
5894         }
5895
5896         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5897 }
5898
5899 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5900 {
5901         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5902         struct net_device *dev = info->user_ptr[1];
5903
5904         return cfg80211_leave_mesh(rdev, dev);
5905 }
5906
5907 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5908 {
5909         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5910         struct sk_buff *msg;
5911         void *hdr;
5912
5913         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5914                 return -EOPNOTSUPP;
5915
5916         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5917         if (!msg)
5918                 return -ENOMEM;
5919
5920         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5921                              NL80211_CMD_GET_WOWLAN);
5922         if (!hdr)
5923                 goto nla_put_failure;
5924
5925         if (rdev->wowlan) {
5926                 struct nlattr *nl_wowlan;
5927
5928                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5929                 if (!nl_wowlan)
5930                         goto nla_put_failure;
5931
5932                 if (rdev->wowlan->any)
5933                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5934                 if (rdev->wowlan->disconnect)
5935                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5936                 if (rdev->wowlan->magic_pkt)
5937                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5938                 if (rdev->wowlan->gtk_rekey_failure)
5939                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
5940                 if (rdev->wowlan->eap_identity_req)