Commit | Line | Data |
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1da177e4 | 1 | /* |
3d23e349 | 2 | * This file implement the Wireless Extensions core API. |
1da177e4 LT |
3 | * |
4 | * Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com> | |
c2805fbb | 5 | * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved. |
3d23e349 | 6 | * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> |
be23b2d7 | 7 | * Copyright (C) 2024 Intel Corporation |
1da177e4 LT |
8 | * |
9 | * (As all part of the Linux kernel, this file is GPL) | |
10 | */ | |
3d23e349 JB |
11 | #include <linux/kernel.h> |
12 | #include <linux/netdevice.h> | |
13 | #include <linux/rtnetlink.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
3d23e349 JB |
15 | #include <linux/wireless.h> |
16 | #include <linux/uaccess.h> | |
bc3b2d7f | 17 | #include <linux/export.h> |
3d23e349 JB |
18 | #include <net/cfg80211.h> |
19 | #include <net/iw_handler.h> | |
bd5785ba | 20 | #include <net/netlink.h> |
295f4a1f | 21 | #include <net/wext.h> |
3d23e349 JB |
22 | #include <net/net_namespace.h> |
23 | ||
24 | typedef int (*wext_ioctl_func)(struct net_device *, struct iwreq *, | |
25 | unsigned int, struct iw_request_info *, | |
26 | iw_handler); | |
1da177e4 | 27 | |
1da177e4 | 28 | |
1da177e4 LT |
29 | /* |
30 | * Meta-data about all the standard Wireless Extension request we | |
31 | * know about. | |
32 | */ | |
33 | static const struct iw_ioctl_description standard_ioctl[] = { | |
44608f80 | 34 | [IW_IOCTL_IDX(SIOCSIWCOMMIT)] = { |
1da177e4 LT |
35 | .header_type = IW_HEADER_TYPE_NULL, |
36 | }, | |
44608f80 | 37 | [IW_IOCTL_IDX(SIOCGIWNAME)] = { |
1da177e4 LT |
38 | .header_type = IW_HEADER_TYPE_CHAR, |
39 | .flags = IW_DESCR_FLAG_DUMP, | |
40 | }, | |
44608f80 | 41 | [IW_IOCTL_IDX(SIOCSIWNWID)] = { |
1da177e4 LT |
42 | .header_type = IW_HEADER_TYPE_PARAM, |
43 | .flags = IW_DESCR_FLAG_EVENT, | |
44 | }, | |
44608f80 | 45 | [IW_IOCTL_IDX(SIOCGIWNWID)] = { |
1da177e4 LT |
46 | .header_type = IW_HEADER_TYPE_PARAM, |
47 | .flags = IW_DESCR_FLAG_DUMP, | |
48 | }, | |
44608f80 | 49 | [IW_IOCTL_IDX(SIOCSIWFREQ)] = { |
1da177e4 LT |
50 | .header_type = IW_HEADER_TYPE_FREQ, |
51 | .flags = IW_DESCR_FLAG_EVENT, | |
52 | }, | |
44608f80 | 53 | [IW_IOCTL_IDX(SIOCGIWFREQ)] = { |
1da177e4 LT |
54 | .header_type = IW_HEADER_TYPE_FREQ, |
55 | .flags = IW_DESCR_FLAG_DUMP, | |
56 | }, | |
44608f80 | 57 | [IW_IOCTL_IDX(SIOCSIWMODE)] = { |
1da177e4 LT |
58 | .header_type = IW_HEADER_TYPE_UINT, |
59 | .flags = IW_DESCR_FLAG_EVENT, | |
60 | }, | |
44608f80 | 61 | [IW_IOCTL_IDX(SIOCGIWMODE)] = { |
1da177e4 LT |
62 | .header_type = IW_HEADER_TYPE_UINT, |
63 | .flags = IW_DESCR_FLAG_DUMP, | |
64 | }, | |
44608f80 | 65 | [IW_IOCTL_IDX(SIOCSIWSENS)] = { |
1da177e4 LT |
66 | .header_type = IW_HEADER_TYPE_PARAM, |
67 | }, | |
44608f80 | 68 | [IW_IOCTL_IDX(SIOCGIWSENS)] = { |
1da177e4 LT |
69 | .header_type = IW_HEADER_TYPE_PARAM, |
70 | }, | |
44608f80 | 71 | [IW_IOCTL_IDX(SIOCSIWRANGE)] = { |
1da177e4 LT |
72 | .header_type = IW_HEADER_TYPE_NULL, |
73 | }, | |
44608f80 | 74 | [IW_IOCTL_IDX(SIOCGIWRANGE)] = { |
1da177e4 LT |
75 | .header_type = IW_HEADER_TYPE_POINT, |
76 | .token_size = 1, | |
77 | .max_tokens = sizeof(struct iw_range), | |
78 | .flags = IW_DESCR_FLAG_DUMP, | |
79 | }, | |
44608f80 | 80 | [IW_IOCTL_IDX(SIOCSIWPRIV)] = { |
1da177e4 LT |
81 | .header_type = IW_HEADER_TYPE_NULL, |
82 | }, | |
44608f80 | 83 | [IW_IOCTL_IDX(SIOCGIWPRIV)] = { /* (handled directly by us) */ |
711e2c33 JT |
84 | .header_type = IW_HEADER_TYPE_POINT, |
85 | .token_size = sizeof(struct iw_priv_args), | |
86 | .max_tokens = 16, | |
87 | .flags = IW_DESCR_FLAG_NOMAX, | |
1da177e4 | 88 | }, |
44608f80 | 89 | [IW_IOCTL_IDX(SIOCSIWSTATS)] = { |
1da177e4 LT |
90 | .header_type = IW_HEADER_TYPE_NULL, |
91 | }, | |
44608f80 | 92 | [IW_IOCTL_IDX(SIOCGIWSTATS)] = { /* (handled directly by us) */ |
711e2c33 JT |
93 | .header_type = IW_HEADER_TYPE_POINT, |
94 | .token_size = 1, | |
95 | .max_tokens = sizeof(struct iw_statistics), | |
1da177e4 LT |
96 | .flags = IW_DESCR_FLAG_DUMP, |
97 | }, | |
44608f80 | 98 | [IW_IOCTL_IDX(SIOCSIWSPY)] = { |
1da177e4 LT |
99 | .header_type = IW_HEADER_TYPE_POINT, |
100 | .token_size = sizeof(struct sockaddr), | |
101 | .max_tokens = IW_MAX_SPY, | |
102 | }, | |
44608f80 | 103 | [IW_IOCTL_IDX(SIOCGIWSPY)] = { |
1da177e4 LT |
104 | .header_type = IW_HEADER_TYPE_POINT, |
105 | .token_size = sizeof(struct sockaddr) + | |
106 | sizeof(struct iw_quality), | |
107 | .max_tokens = IW_MAX_SPY, | |
108 | }, | |
44608f80 | 109 | [IW_IOCTL_IDX(SIOCSIWTHRSPY)] = { |
1da177e4 LT |
110 | .header_type = IW_HEADER_TYPE_POINT, |
111 | .token_size = sizeof(struct iw_thrspy), | |
112 | .min_tokens = 1, | |
113 | .max_tokens = 1, | |
114 | }, | |
44608f80 | 115 | [IW_IOCTL_IDX(SIOCGIWTHRSPY)] = { |
1da177e4 LT |
116 | .header_type = IW_HEADER_TYPE_POINT, |
117 | .token_size = sizeof(struct iw_thrspy), | |
118 | .min_tokens = 1, | |
119 | .max_tokens = 1, | |
120 | }, | |
44608f80 | 121 | [IW_IOCTL_IDX(SIOCSIWAP)] = { |
1da177e4 LT |
122 | .header_type = IW_HEADER_TYPE_ADDR, |
123 | }, | |
44608f80 | 124 | [IW_IOCTL_IDX(SIOCGIWAP)] = { |
1da177e4 LT |
125 | .header_type = IW_HEADER_TYPE_ADDR, |
126 | .flags = IW_DESCR_FLAG_DUMP, | |
127 | }, | |
44608f80 | 128 | [IW_IOCTL_IDX(SIOCSIWMLME)] = { |
fff9cfd9 | 129 | .header_type = IW_HEADER_TYPE_POINT, |
130 | .token_size = 1, | |
131 | .min_tokens = sizeof(struct iw_mlme), | |
132 | .max_tokens = sizeof(struct iw_mlme), | |
133 | }, | |
44608f80 | 134 | [IW_IOCTL_IDX(SIOCGIWAPLIST)] = { |
1da177e4 LT |
135 | .header_type = IW_HEADER_TYPE_POINT, |
136 | .token_size = sizeof(struct sockaddr) + | |
137 | sizeof(struct iw_quality), | |
138 | .max_tokens = IW_MAX_AP, | |
139 | .flags = IW_DESCR_FLAG_NOMAX, | |
140 | }, | |
44608f80 | 141 | [IW_IOCTL_IDX(SIOCSIWSCAN)] = { |
fff9cfd9 | 142 | .header_type = IW_HEADER_TYPE_POINT, |
143 | .token_size = 1, | |
144 | .min_tokens = 0, | |
145 | .max_tokens = sizeof(struct iw_scan_req), | |
1da177e4 | 146 | }, |
44608f80 | 147 | [IW_IOCTL_IDX(SIOCGIWSCAN)] = { |
1da177e4 LT |
148 | .header_type = IW_HEADER_TYPE_POINT, |
149 | .token_size = 1, | |
150 | .max_tokens = IW_SCAN_MAX_DATA, | |
151 | .flags = IW_DESCR_FLAG_NOMAX, | |
152 | }, | |
44608f80 | 153 | [IW_IOCTL_IDX(SIOCSIWESSID)] = { |
1da177e4 LT |
154 | .header_type = IW_HEADER_TYPE_POINT, |
155 | .token_size = 1, | |
baef1865 | 156 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
157 | .flags = IW_DESCR_FLAG_EVENT, |
158 | }, | |
44608f80 | 159 | [IW_IOCTL_IDX(SIOCGIWESSID)] = { |
1da177e4 LT |
160 | .header_type = IW_HEADER_TYPE_POINT, |
161 | .token_size = 1, | |
baef1865 | 162 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
163 | .flags = IW_DESCR_FLAG_DUMP, |
164 | }, | |
44608f80 | 165 | [IW_IOCTL_IDX(SIOCSIWNICKN)] = { |
1da177e4 LT |
166 | .header_type = IW_HEADER_TYPE_POINT, |
167 | .token_size = 1, | |
baef1865 | 168 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 | 169 | }, |
44608f80 | 170 | [IW_IOCTL_IDX(SIOCGIWNICKN)] = { |
1da177e4 LT |
171 | .header_type = IW_HEADER_TYPE_POINT, |
172 | .token_size = 1, | |
baef1865 | 173 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 | 174 | }, |
44608f80 | 175 | [IW_IOCTL_IDX(SIOCSIWRATE)] = { |
1da177e4 LT |
176 | .header_type = IW_HEADER_TYPE_PARAM, |
177 | }, | |
44608f80 | 178 | [IW_IOCTL_IDX(SIOCGIWRATE)] = { |
1da177e4 LT |
179 | .header_type = IW_HEADER_TYPE_PARAM, |
180 | }, | |
44608f80 | 181 | [IW_IOCTL_IDX(SIOCSIWRTS)] = { |
1da177e4 LT |
182 | .header_type = IW_HEADER_TYPE_PARAM, |
183 | }, | |
44608f80 | 184 | [IW_IOCTL_IDX(SIOCGIWRTS)] = { |
1da177e4 LT |
185 | .header_type = IW_HEADER_TYPE_PARAM, |
186 | }, | |
44608f80 | 187 | [IW_IOCTL_IDX(SIOCSIWFRAG)] = { |
1da177e4 LT |
188 | .header_type = IW_HEADER_TYPE_PARAM, |
189 | }, | |
44608f80 | 190 | [IW_IOCTL_IDX(SIOCGIWFRAG)] = { |
1da177e4 LT |
191 | .header_type = IW_HEADER_TYPE_PARAM, |
192 | }, | |
44608f80 | 193 | [IW_IOCTL_IDX(SIOCSIWTXPOW)] = { |
1da177e4 LT |
194 | .header_type = IW_HEADER_TYPE_PARAM, |
195 | }, | |
44608f80 | 196 | [IW_IOCTL_IDX(SIOCGIWTXPOW)] = { |
1da177e4 LT |
197 | .header_type = IW_HEADER_TYPE_PARAM, |
198 | }, | |
44608f80 | 199 | [IW_IOCTL_IDX(SIOCSIWRETRY)] = { |
1da177e4 LT |
200 | .header_type = IW_HEADER_TYPE_PARAM, |
201 | }, | |
44608f80 | 202 | [IW_IOCTL_IDX(SIOCGIWRETRY)] = { |
1da177e4 LT |
203 | .header_type = IW_HEADER_TYPE_PARAM, |
204 | }, | |
44608f80 | 205 | [IW_IOCTL_IDX(SIOCSIWENCODE)] = { |
1da177e4 LT |
206 | .header_type = IW_HEADER_TYPE_POINT, |
207 | .token_size = 1, | |
208 | .max_tokens = IW_ENCODING_TOKEN_MAX, | |
209 | .flags = IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT, | |
210 | }, | |
44608f80 | 211 | [IW_IOCTL_IDX(SIOCGIWENCODE)] = { |
1da177e4 LT |
212 | .header_type = IW_HEADER_TYPE_POINT, |
213 | .token_size = 1, | |
214 | .max_tokens = IW_ENCODING_TOKEN_MAX, | |
215 | .flags = IW_DESCR_FLAG_DUMP | IW_DESCR_FLAG_RESTRICT, | |
216 | }, | |
44608f80 | 217 | [IW_IOCTL_IDX(SIOCSIWPOWER)] = { |
1da177e4 LT |
218 | .header_type = IW_HEADER_TYPE_PARAM, |
219 | }, | |
44608f80 | 220 | [IW_IOCTL_IDX(SIOCGIWPOWER)] = { |
1da177e4 LT |
221 | .header_type = IW_HEADER_TYPE_PARAM, |
222 | }, | |
44608f80 | 223 | [IW_IOCTL_IDX(SIOCSIWGENIE)] = { |
fff9cfd9 | 224 | .header_type = IW_HEADER_TYPE_POINT, |
225 | .token_size = 1, | |
226 | .max_tokens = IW_GENERIC_IE_MAX, | |
227 | }, | |
44608f80 | 228 | [IW_IOCTL_IDX(SIOCGIWGENIE)] = { |
fff9cfd9 | 229 | .header_type = IW_HEADER_TYPE_POINT, |
230 | .token_size = 1, | |
231 | .max_tokens = IW_GENERIC_IE_MAX, | |
232 | }, | |
44608f80 | 233 | [IW_IOCTL_IDX(SIOCSIWAUTH)] = { |
fff9cfd9 | 234 | .header_type = IW_HEADER_TYPE_PARAM, |
235 | }, | |
44608f80 | 236 | [IW_IOCTL_IDX(SIOCGIWAUTH)] = { |
fff9cfd9 | 237 | .header_type = IW_HEADER_TYPE_PARAM, |
238 | }, | |
44608f80 | 239 | [IW_IOCTL_IDX(SIOCSIWENCODEEXT)] = { |
fff9cfd9 | 240 | .header_type = IW_HEADER_TYPE_POINT, |
241 | .token_size = 1, | |
242 | .min_tokens = sizeof(struct iw_encode_ext), | |
243 | .max_tokens = sizeof(struct iw_encode_ext) + | |
244 | IW_ENCODING_TOKEN_MAX, | |
245 | }, | |
44608f80 | 246 | [IW_IOCTL_IDX(SIOCGIWENCODEEXT)] = { |
fff9cfd9 | 247 | .header_type = IW_HEADER_TYPE_POINT, |
248 | .token_size = 1, | |
249 | .min_tokens = sizeof(struct iw_encode_ext), | |
250 | .max_tokens = sizeof(struct iw_encode_ext) + | |
251 | IW_ENCODING_TOKEN_MAX, | |
252 | }, | |
44608f80 | 253 | [IW_IOCTL_IDX(SIOCSIWPMKSA)] = { |
fff9cfd9 | 254 | .header_type = IW_HEADER_TYPE_POINT, |
255 | .token_size = 1, | |
256 | .min_tokens = sizeof(struct iw_pmksa), | |
257 | .max_tokens = sizeof(struct iw_pmksa), | |
258 | }, | |
1da177e4 | 259 | }; |
95c96174 | 260 | static const unsigned int standard_ioctl_num = ARRAY_SIZE(standard_ioctl); |
1da177e4 LT |
261 | |
262 | /* | |
263 | * Meta-data about all the additional standard Wireless Extension events | |
264 | * we know about. | |
265 | */ | |
266 | static const struct iw_ioctl_description standard_event[] = { | |
76326f1d | 267 | [IW_EVENT_IDX(IWEVTXDROP)] = { |
1da177e4 LT |
268 | .header_type = IW_HEADER_TYPE_ADDR, |
269 | }, | |
76326f1d | 270 | [IW_EVENT_IDX(IWEVQUAL)] = { |
1da177e4 LT |
271 | .header_type = IW_HEADER_TYPE_QUAL, |
272 | }, | |
76326f1d | 273 | [IW_EVENT_IDX(IWEVCUSTOM)] = { |
1da177e4 LT |
274 | .header_type = IW_HEADER_TYPE_POINT, |
275 | .token_size = 1, | |
276 | .max_tokens = IW_CUSTOM_MAX, | |
277 | }, | |
76326f1d | 278 | [IW_EVENT_IDX(IWEVREGISTERED)] = { |
1da177e4 LT |
279 | .header_type = IW_HEADER_TYPE_ADDR, |
280 | }, | |
76326f1d | 281 | [IW_EVENT_IDX(IWEVEXPIRED)] = { |
4ec93edb | 282 | .header_type = IW_HEADER_TYPE_ADDR, |
1da177e4 | 283 | }, |
76326f1d | 284 | [IW_EVENT_IDX(IWEVGENIE)] = { |
fff9cfd9 | 285 | .header_type = IW_HEADER_TYPE_POINT, |
286 | .token_size = 1, | |
287 | .max_tokens = IW_GENERIC_IE_MAX, | |
288 | }, | |
76326f1d | 289 | [IW_EVENT_IDX(IWEVMICHAELMICFAILURE)] = { |
4ec93edb | 290 | .header_type = IW_HEADER_TYPE_POINT, |
fff9cfd9 | 291 | .token_size = 1, |
292 | .max_tokens = sizeof(struct iw_michaelmicfailure), | |
293 | }, | |
76326f1d | 294 | [IW_EVENT_IDX(IWEVASSOCREQIE)] = { |
fff9cfd9 | 295 | .header_type = IW_HEADER_TYPE_POINT, |
296 | .token_size = 1, | |
297 | .max_tokens = IW_GENERIC_IE_MAX, | |
298 | }, | |
76326f1d | 299 | [IW_EVENT_IDX(IWEVASSOCRESPIE)] = { |
fff9cfd9 | 300 | .header_type = IW_HEADER_TYPE_POINT, |
301 | .token_size = 1, | |
302 | .max_tokens = IW_GENERIC_IE_MAX, | |
303 | }, | |
76326f1d | 304 | [IW_EVENT_IDX(IWEVPMKIDCAND)] = { |
fff9cfd9 | 305 | .header_type = IW_HEADER_TYPE_POINT, |
306 | .token_size = 1, | |
307 | .max_tokens = sizeof(struct iw_pmkid_cand), | |
308 | }, | |
1da177e4 | 309 | }; |
95c96174 | 310 | static const unsigned int standard_event_num = ARRAY_SIZE(standard_event); |
1da177e4 | 311 | |
1da177e4 LT |
312 | /* Size (in bytes) of various events */ |
313 | static const int event_type_size[] = { | |
314 | IW_EV_LCP_LEN, /* IW_HEADER_TYPE_NULL */ | |
315 | 0, | |
316 | IW_EV_CHAR_LEN, /* IW_HEADER_TYPE_CHAR */ | |
317 | 0, | |
318 | IW_EV_UINT_LEN, /* IW_HEADER_TYPE_UINT */ | |
319 | IW_EV_FREQ_LEN, /* IW_HEADER_TYPE_FREQ */ | |
320 | IW_EV_ADDR_LEN, /* IW_HEADER_TYPE_ADDR */ | |
321 | 0, | |
322 | IW_EV_POINT_LEN, /* Without variable payload */ | |
323 | IW_EV_PARAM_LEN, /* IW_HEADER_TYPE_PARAM */ | |
324 | IW_EV_QUAL_LEN, /* IW_HEADER_TYPE_QUAL */ | |
325 | }; | |
326 | ||
1dacc76d JB |
327 | #ifdef CONFIG_COMPAT |
328 | static const int compat_event_type_size[] = { | |
329 | IW_EV_COMPAT_LCP_LEN, /* IW_HEADER_TYPE_NULL */ | |
330 | 0, | |
331 | IW_EV_COMPAT_CHAR_LEN, /* IW_HEADER_TYPE_CHAR */ | |
332 | 0, | |
333 | IW_EV_COMPAT_UINT_LEN, /* IW_HEADER_TYPE_UINT */ | |
334 | IW_EV_COMPAT_FREQ_LEN, /* IW_HEADER_TYPE_FREQ */ | |
335 | IW_EV_COMPAT_ADDR_LEN, /* IW_HEADER_TYPE_ADDR */ | |
336 | 0, | |
337 | IW_EV_COMPAT_POINT_LEN, /* Without variable payload */ | |
338 | IW_EV_COMPAT_PARAM_LEN, /* IW_HEADER_TYPE_PARAM */ | |
339 | IW_EV_COMPAT_QUAL_LEN, /* IW_HEADER_TYPE_QUAL */ | |
340 | }; | |
341 | #endif | |
c2805fbb | 342 | |
1da177e4 | 343 | |
3d23e349 | 344 | /* IW event code */ |
1da177e4 | 345 | |
cb150b9d | 346 | void wireless_nlevent_flush(void) |
8bf86273 JB |
347 | { |
348 | struct sk_buff *skb; | |
349 | struct net *net; | |
350 | ||
f0b07bb1 | 351 | down_read(&net_rwsem); |
8bf86273 JB |
352 | for_each_net(net) { |
353 | while ((skb = skb_dequeue(&net->wext_nlevents))) | |
354 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, | |
355 | GFP_KERNEL); | |
356 | } | |
f0b07bb1 | 357 | up_read(&net_rwsem); |
8bf86273 | 358 | } |
cb150b9d | 359 | EXPORT_SYMBOL_GPL(wireless_nlevent_flush); |
8bf86273 JB |
360 | |
361 | static int wext_netdev_notifier_call(struct notifier_block *nb, | |
362 | unsigned long state, void *ptr) | |
363 | { | |
364 | /* | |
365 | * When a netdev changes state in any way, flush all pending messages | |
366 | * to avoid them going out in a strange order, e.g. RTM_NEWLINK after | |
367 | * RTM_DELLINK, or with IFF_UP after without IFF_UP during dev_close() | |
368 | * or similar - all of which could otherwise happen due to delays from | |
369 | * schedule_work(). | |
370 | */ | |
371 | wireless_nlevent_flush(); | |
372 | ||
373 | return NOTIFY_OK; | |
374 | } | |
375 | ||
376 | static struct notifier_block wext_netdev_notifier = { | |
377 | .notifier_call = wext_netdev_notifier_call, | |
378 | }; | |
379 | ||
3d23e349 | 380 | static int __net_init wext_pernet_init(struct net *net) |
711e2c33 | 381 | { |
3d23e349 JB |
382 | skb_queue_head_init(&net->wext_nlevents); |
383 | return 0; | |
711e2c33 JT |
384 | } |
385 | ||
3d23e349 | 386 | static void __net_exit wext_pernet_exit(struct net *net) |
711e2c33 | 387 | { |
3d23e349 | 388 | skb_queue_purge(&net->wext_nlevents); |
711e2c33 JT |
389 | } |
390 | ||
3d23e349 JB |
391 | static struct pernet_operations wext_pernet_ops = { |
392 | .init = wext_pernet_init, | |
393 | .exit = wext_pernet_exit, | |
394 | }; | |
1da177e4 | 395 | |
3d23e349 | 396 | static int __init wireless_nlevent_init(void) |
1da177e4 | 397 | { |
8bf86273 JB |
398 | int err = register_pernet_subsys(&wext_pernet_ops); |
399 | ||
400 | if (err) | |
401 | return err; | |
402 | ||
98bd147d JB |
403 | err = register_netdevice_notifier(&wext_netdev_notifier); |
404 | if (err) | |
405 | unregister_pernet_subsys(&wext_pernet_ops); | |
406 | return err; | |
1da177e4 LT |
407 | } |
408 | ||
3d23e349 | 409 | subsys_initcall(wireless_nlevent_init); |
1da177e4 | 410 | |
3d23e349 JB |
411 | /* Process events generated by the wireless layer or the driver. */ |
412 | static void wireless_nlevent_process(struct work_struct *work) | |
7be69c0b | 413 | { |
8bf86273 | 414 | wireless_nlevent_flush(); |
7be69c0b JB |
415 | } |
416 | ||
3d23e349 | 417 | static DECLARE_WORK(wireless_nlevent_work, wireless_nlevent_process); |
1da177e4 | 418 | |
3d23e349 JB |
419 | static struct nlmsghdr *rtnetlink_ifinfo_prep(struct net_device *dev, |
420 | struct sk_buff *skb) | |
1da177e4 | 421 | { |
3d23e349 JB |
422 | struct ifinfomsg *r; |
423 | struct nlmsghdr *nlh; | |
1da177e4 | 424 | |
3d23e349 JB |
425 | nlh = nlmsg_put(skb, 0, 0, RTM_NEWLINK, sizeof(*r), 0); |
426 | if (!nlh) | |
427 | return NULL; | |
1da177e4 | 428 | |
3d23e349 JB |
429 | r = nlmsg_data(nlh); |
430 | r->ifi_family = AF_UNSPEC; | |
431 | r->__ifi_pad = 0; | |
432 | r->ifi_type = dev->type; | |
433 | r->ifi_index = dev->ifindex; | |
434 | r->ifi_flags = dev_get_flags(dev); | |
435 | r->ifi_change = 0; /* Wireless changes don't affect those flags */ | |
1da177e4 | 436 | |
9360ffd1 DM |
437 | if (nla_put_string(skb, IFLA_IFNAME, dev->name)) |
438 | goto nla_put_failure; | |
881d966b | 439 | |
3d23e349 JB |
440 | return nlh; |
441 | nla_put_failure: | |
442 | nlmsg_cancel(skb, nlh); | |
443 | return NULL; | |
881d966b | 444 | } |
1da177e4 | 445 | |
3d23e349 | 446 | |
1da177e4 | 447 | /* |
3d23e349 JB |
448 | * Main event dispatcher. Called from other parts and drivers. |
449 | * Send the event on the appropriate channels. | |
450 | * May be called from interrupt context. | |
1da177e4 | 451 | */ |
3d23e349 JB |
452 | void wireless_send_event(struct net_device * dev, |
453 | unsigned int cmd, | |
454 | union iwreq_data * wrqu, | |
455 | const char * extra) | |
84149b0f | 456 | { |
3d23e349 JB |
457 | const struct iw_ioctl_description * descr = NULL; |
458 | int extra_len = 0; | |
459 | struct iw_event *event; /* Mallocated whole event */ | |
460 | int event_len; /* Its size */ | |
461 | int hdr_len; /* Size of the event header */ | |
462 | int wrqu_off = 0; /* Offset in wrqu */ | |
463 | /* Don't "optimise" the following variable, it will crash */ | |
95c96174 | 464 | unsigned int cmd_index; /* *MUST* be unsigned */ |
3d23e349 JB |
465 | struct sk_buff *skb; |
466 | struct nlmsghdr *nlh; | |
467 | struct nlattr *nla; | |
468 | #ifdef CONFIG_COMPAT | |
469 | struct __compat_iw_event *compat_event; | |
470 | struct compat_iw_point compat_wrqu; | |
471 | struct sk_buff *compskb; | |
e3e6e1d1 | 472 | int ptr_len; |
3d23e349 | 473 | #endif |
84149b0f | 474 | |
3d23e349 JB |
475 | /* |
476 | * Nothing in the kernel sends scan events with data, be safe. | |
477 | * This is necessary because we cannot fix up scan event data | |
478 | * for compat, due to being contained in 'extra', but normally | |
479 | * applications are required to retrieve the scan data anyway | |
480 | * and no data is included in the event, this codifies that | |
481 | * practice. | |
84149b0f | 482 | */ |
3d23e349 JB |
483 | if (WARN_ON(cmd == SIOCGIWSCAN && extra)) |
484 | extra = NULL; | |
84149b0f | 485 | |
3d23e349 JB |
486 | /* Get the description of the Event */ |
487 | if (cmd <= SIOCIWLAST) { | |
44608f80 | 488 | cmd_index = IW_IOCTL_IDX(cmd); |
3d23e349 JB |
489 | if (cmd_index < standard_ioctl_num) |
490 | descr = &(standard_ioctl[cmd_index]); | |
491 | } else { | |
76326f1d | 492 | cmd_index = IW_EVENT_IDX(cmd); |
3d23e349 JB |
493 | if (cmd_index < standard_event_num) |
494 | descr = &(standard_event[cmd_index]); | |
495 | } | |
496 | /* Don't accept unknown events */ | |
497 | if (descr == NULL) { | |
498 | /* Note : we don't return an error to the driver, because | |
499 | * the driver would not know what to do about it. It can't | |
500 | * return an error to the user, because the event is not | |
501 | * initiated by a user request. | |
502 | * The best the driver could do is to log an error message. | |
503 | * We will do it ourselves instead... | |
504 | */ | |
e9c0268f JP |
505 | netdev_err(dev, "(WE) : Invalid/Unknown Wireless Event (0x%04X)\n", |
506 | cmd); | |
3d23e349 JB |
507 | return; |
508 | } | |
509 | ||
510 | /* Check extra parameters and set extra_len */ | |
511 | if (descr->header_type == IW_HEADER_TYPE_POINT) { | |
512 | /* Check if number of token fits within bounds */ | |
513 | if (wrqu->data.length > descr->max_tokens) { | |
e5f5b2fb AS |
514 | netdev_err(dev, "(WE) : Wireless Event (cmd=0x%04X) too big (%d)\n", |
515 | cmd, wrqu->data.length); | |
3d23e349 JB |
516 | return; |
517 | } | |
518 | if (wrqu->data.length < descr->min_tokens) { | |
e5f5b2fb AS |
519 | netdev_err(dev, "(WE) : Wireless Event (cmd=0x%04X) too small (%d)\n", |
520 | cmd, wrqu->data.length); | |
3d23e349 JB |
521 | return; |
522 | } | |
523 | /* Calculate extra_len - extra is NULL for restricted events */ | |
524 | if (extra != NULL) | |
525 | extra_len = wrqu->data.length * descr->token_size; | |
526 | /* Always at an offset in wrqu */ | |
527 | wrqu_off = IW_EV_POINT_OFF; | |
528 | } | |
529 | ||
530 | /* Total length of the event */ | |
531 | hdr_len = event_type_size[descr->header_type]; | |
532 | event_len = hdr_len + extra_len; | |
533 | ||
534 | /* | |
535 | * The problem for 64/32 bit. | |
536 | * | |
537 | * On 64-bit, a regular event is laid out as follows: | |
538 | * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | | |
539 | * | event.len | event.cmd | p a d d i n g | | |
540 | * | wrqu data ... (with the correct size) | | |
541 | * | |
542 | * This padding exists because we manipulate event->u, | |
543 | * and 'event' is not packed. | |
544 | * | |
545 | * An iw_point event is laid out like this instead: | |
546 | * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | | |
547 | * | event.len | event.cmd | p a d d i n g | | |
548 | * | iwpnt.len | iwpnt.flg | p a d d i n g | | |
549 | * | extra data ... | |
550 | * | |
551 | * The second padding exists because struct iw_point is extended, | |
552 | * but this depends on the platform... | |
553 | * | |
554 | * On 32-bit, all the padding shouldn't be there. | |
555 | */ | |
556 | ||
557 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
558 | if (!skb) | |
559 | return; | |
560 | ||
561 | /* Send via the RtNetlink event channel */ | |
562 | nlh = rtnetlink_ifinfo_prep(dev, skb); | |
563 | if (WARN_ON(!nlh)) { | |
564 | kfree_skb(skb); | |
565 | return; | |
566 | } | |
567 | ||
568 | /* Add the wireless events in the netlink packet */ | |
569 | nla = nla_reserve(skb, IFLA_WIRELESS, event_len); | |
570 | if (!nla) { | |
571 | kfree_skb(skb); | |
572 | return; | |
573 | } | |
574 | event = nla_data(nla); | |
575 | ||
576 | /* Fill event - first clear to avoid data leaking */ | |
577 | memset(event, 0, hdr_len); | |
578 | event->len = event_len; | |
579 | event->cmd = cmd; | |
580 | memcpy(&event->u, ((char *) wrqu) + wrqu_off, hdr_len - IW_EV_LCP_LEN); | |
581 | if (extra_len) | |
582 | memcpy(((char *) event) + hdr_len, extra, extra_len); | |
583 | ||
584 | nlmsg_end(skb, nlh); | |
585 | #ifdef CONFIG_COMPAT | |
586 | hdr_len = compat_event_type_size[descr->header_type]; | |
e3e6e1d1 HJ |
587 | |
588 | /* ptr_len is remaining size in event header apart from LCP */ | |
589 | ptr_len = hdr_len - IW_EV_COMPAT_LCP_LEN; | |
3d23e349 JB |
590 | event_len = hdr_len + extra_len; |
591 | ||
592 | compskb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
593 | if (!compskb) { | |
594 | kfree_skb(skb); | |
595 | return; | |
596 | } | |
597 | ||
598 | /* Send via the RtNetlink event channel */ | |
599 | nlh = rtnetlink_ifinfo_prep(dev, compskb); | |
600 | if (WARN_ON(!nlh)) { | |
601 | kfree_skb(skb); | |
602 | kfree_skb(compskb); | |
603 | return; | |
604 | } | |
605 | ||
606 | /* Add the wireless events in the netlink packet */ | |
607 | nla = nla_reserve(compskb, IFLA_WIRELESS, event_len); | |
608 | if (!nla) { | |
609 | kfree_skb(skb); | |
610 | kfree_skb(compskb); | |
611 | return; | |
612 | } | |
613 | compat_event = nla_data(nla); | |
614 | ||
615 | compat_event->len = event_len; | |
616 | compat_event->cmd = cmd; | |
617 | if (descr->header_type == IW_HEADER_TYPE_POINT) { | |
618 | compat_wrqu.length = wrqu->data.length; | |
619 | compat_wrqu.flags = wrqu->data.flags; | |
e3e6e1d1 HJ |
620 | memcpy(compat_event->ptr_bytes, |
621 | ((char *)&compat_wrqu) + IW_EV_COMPAT_POINT_OFF, | |
622 | ptr_len); | |
3d23e349 | 623 | if (extra_len) |
e3e6e1d1 HJ |
624 | memcpy(&compat_event->ptr_bytes[ptr_len], |
625 | extra, extra_len); | |
3d23e349 JB |
626 | } else { |
627 | /* extra_len must be zero, so no if (extra) needed */ | |
e3e6e1d1 | 628 | memcpy(compat_event->ptr_bytes, wrqu, ptr_len); |
3d23e349 JB |
629 | } |
630 | ||
631 | nlmsg_end(compskb, nlh); | |
632 | ||
633 | skb_shinfo(skb)->frag_list = compskb; | |
634 | #endif | |
635 | skb_queue_tail(&dev_net(dev)->wext_nlevents, skb); | |
636 | schedule_work(&wireless_nlevent_work); | |
637 | } | |
638 | EXPORT_SYMBOL(wireless_send_event); | |
639 | ||
dc09766c JB |
640 | #ifdef CONFIG_CFG80211_WEXT |
641 | static void wireless_warn_cfg80211_wext(void) | |
642 | { | |
643 | char name[sizeof(current->comm)]; | |
3d23e349 | 644 | |
52fd9063 JB |
645 | pr_warn_once("warning: `%s' uses wireless extensions which will stop working for Wi-Fi 7 hardware; use nl80211\n", |
646 | get_task_comm(name, current)); | |
dc09766c JB |
647 | } |
648 | #endif | |
3d23e349 JB |
649 | |
650 | /* IW handlers */ | |
651 | ||
652 | struct iw_statistics *get_wireless_stats(struct net_device *dev) | |
653 | { | |
654 | #ifdef CONFIG_WIRELESS_EXT | |
655 | if ((dev->wireless_handlers != NULL) && | |
656 | (dev->wireless_handlers->get_wireless_stats != NULL)) | |
657 | return dev->wireless_handlers->get_wireless_stats(dev); | |
658 | #endif | |
659 | ||
660 | #ifdef CONFIG_CFG80211_WEXT | |
36539107 | 661 | if (dev->ieee80211_ptr && |
3d23e349 JB |
662 | dev->ieee80211_ptr->wiphy && |
663 | dev->ieee80211_ptr->wiphy->wext && | |
dc09766c JB |
664 | dev->ieee80211_ptr->wiphy->wext->get_wireless_stats) { |
665 | wireless_warn_cfg80211_wext(); | |
be23b2d7 JB |
666 | if (dev->ieee80211_ptr->wiphy->flags & (WIPHY_FLAG_SUPPORTS_MLO | |
667 | WIPHY_FLAG_DISABLE_WEXT)) | |
4ca69027 | 668 | return NULL; |
3d23e349 | 669 | return dev->ieee80211_ptr->wiphy->wext->get_wireless_stats(dev); |
dc09766c | 670 | } |
3d23e349 JB |
671 | #endif |
672 | ||
673 | /* not found */ | |
674 | return NULL; | |
675 | } | |
676 | ||
e1611965 AB |
677 | /* noinline to avoid a bogus warning with -O3 */ |
678 | static noinline int iw_handler_get_iwstats(struct net_device * dev, | |
3d23e349 JB |
679 | struct iw_request_info * info, |
680 | union iwreq_data * wrqu, | |
681 | char * extra) | |
682 | { | |
683 | /* Get stats from the driver */ | |
684 | struct iw_statistics *stats; | |
685 | ||
686 | stats = get_wireless_stats(dev); | |
687 | if (stats) { | |
688 | /* Copy statistics to extra */ | |
689 | memcpy(extra, stats, sizeof(struct iw_statistics)); | |
690 | wrqu->data.length = sizeof(struct iw_statistics); | |
691 | ||
692 | /* Check if we need to clear the updated flag */ | |
693 | if (wrqu->data.flags != 0) | |
694 | stats->qual.updated &= ~IW_QUAL_ALL_UPDATED; | |
695 | return 0; | |
696 | } else | |
697 | return -EOPNOTSUPP; | |
698 | } | |
699 | ||
700 | static iw_handler get_handler(struct net_device *dev, unsigned int cmd) | |
701 | { | |
702 | /* Don't "optimise" the following variable, it will crash */ | |
703 | unsigned int index; /* *MUST* be unsigned */ | |
704 | const struct iw_handler_def *handlers = NULL; | |
705 | ||
706 | #ifdef CONFIG_CFG80211_WEXT | |
dc09766c JB |
707 | if (dev->ieee80211_ptr && dev->ieee80211_ptr->wiphy) { |
708 | wireless_warn_cfg80211_wext(); | |
be23b2d7 JB |
709 | if (dev->ieee80211_ptr->wiphy->flags & (WIPHY_FLAG_SUPPORTS_MLO | |
710 | WIPHY_FLAG_DISABLE_WEXT)) | |
4ca69027 | 711 | return NULL; |
3d23e349 | 712 | handlers = dev->ieee80211_ptr->wiphy->wext; |
dc09766c | 713 | } |
3d23e349 JB |
714 | #endif |
715 | #ifdef CONFIG_WIRELESS_EXT | |
716 | if (dev->wireless_handlers) | |
717 | handlers = dev->wireless_handlers; | |
718 | #endif | |
719 | ||
720 | if (!handlers) | |
721 | return NULL; | |
722 | ||
723 | /* Try as a standard command */ | |
44608f80 | 724 | index = IW_IOCTL_IDX(cmd); |
3d23e349 JB |
725 | if (index < handlers->num_standard) |
726 | return handlers->standard[index]; | |
727 | ||
728 | #ifdef CONFIG_WEXT_PRIV | |
729 | /* Try as a private command */ | |
730 | index = cmd - SIOCIWFIRSTPRIV; | |
731 | if (index < handlers->num_private) | |
732 | return handlers->private[index]; | |
733 | #endif | |
734 | ||
735 | /* Not found */ | |
736 | return NULL; | |
737 | } | |
738 | ||
739 | static int ioctl_standard_iw_point(struct iw_point *iwp, unsigned int cmd, | |
740 | const struct iw_ioctl_description *descr, | |
741 | iw_handler handler, struct net_device *dev, | |
742 | struct iw_request_info *info) | |
743 | { | |
744 | int err, extra_size, user_length = 0, essid_compat = 0; | |
745 | char *extra; | |
746 | ||
747 | /* Calculate space needed by arguments. Always allocate | |
748 | * for max space. | |
749 | */ | |
750 | extra_size = descr->max_tokens * descr->token_size; | |
751 | ||
752 | /* Check need for ESSID compatibility for WE < 21 */ | |
753 | switch (cmd) { | |
84149b0f DM |
754 | case SIOCSIWESSID: |
755 | case SIOCGIWESSID: | |
756 | case SIOCSIWNICKN: | |
757 | case SIOCGIWNICKN: | |
758 | if (iwp->length == descr->max_tokens + 1) | |
759 | essid_compat = 1; | |
760 | else if (IW_IS_SET(cmd) && (iwp->length != 0)) { | |
761 | char essid[IW_ESSID_MAX_SIZE + 1]; | |
8503bd8c AV |
762 | unsigned int len; |
763 | len = iwp->length * descr->token_size; | |
84149b0f | 764 | |
8503bd8c AV |
765 | if (len > IW_ESSID_MAX_SIZE) |
766 | return -EFAULT; | |
767 | ||
768 | err = copy_from_user(essid, iwp->pointer, len); | |
84149b0f DM |
769 | if (err) |
770 | return -EFAULT; | |
771 | ||
772 | if (essid[iwp->length - 1] == '\0') | |
773 | essid_compat = 1; | |
774 | } | |
775 | break; | |
776 | default: | |
777 | break; | |
778 | } | |
779 | ||
780 | iwp->length -= essid_compat; | |
781 | ||
782 | /* Check what user space is giving us */ | |
783 | if (IW_IS_SET(cmd)) { | |
784 | /* Check NULL pointer */ | |
785 | if (!iwp->pointer && iwp->length != 0) | |
786 | return -EFAULT; | |
787 | /* Check if number of token fits within bounds */ | |
788 | if (iwp->length > descr->max_tokens) | |
789 | return -E2BIG; | |
790 | if (iwp->length < descr->min_tokens) | |
791 | return -EINVAL; | |
792 | } else { | |
793 | /* Check NULL pointer */ | |
794 | if (!iwp->pointer) | |
795 | return -EFAULT; | |
796 | /* Save user space buffer size for checking */ | |
797 | user_length = iwp->length; | |
798 | ||
799 | /* Don't check if user_length > max to allow forward | |
800 | * compatibility. The test user_length < min is | |
801 | * implied by the test at the end. | |
802 | */ | |
803 | ||
804 | /* Support for very large requests */ | |
805 | if ((descr->flags & IW_DESCR_FLAG_NOMAX) && | |
806 | (user_length > descr->max_tokens)) { | |
807 | /* Allow userspace to GET more than max so | |
808 | * we can support any size GET requests. | |
809 | * There is still a limit : -ENOMEM. | |
810 | */ | |
811 | extra_size = user_length * descr->token_size; | |
812 | ||
813 | /* Note : user_length is originally a __u16, | |
814 | * and token_size is controlled by us, | |
815 | * so extra_size won't get negative and | |
816 | * won't overflow... | |
817 | */ | |
818 | } | |
819 | } | |
820 | ||
71e7552c GS |
821 | /* Sanity-check to ensure we never end up _allocating_ zero |
822 | * bytes of data for extra. | |
823 | */ | |
824 | if (extra_size <= 0) | |
825 | return -EFAULT; | |
826 | ||
84149b0f DM |
827 | /* kzalloc() ensures NULL-termination for essid_compat. */ |
828 | extra = kzalloc(extra_size, GFP_KERNEL); | |
829 | if (!extra) | |
830 | return -ENOMEM; | |
831 | ||
832 | /* If it is a SET, get all the extra data in here */ | |
833 | if (IW_IS_SET(cmd) && (iwp->length != 0)) { | |
834 | if (copy_from_user(extra, iwp->pointer, | |
835 | iwp->length * | |
836 | descr->token_size)) { | |
837 | err = -EFAULT; | |
838 | goto out; | |
839 | } | |
88f16db7 JB |
840 | |
841 | if (cmd == SIOCSIWENCODEEXT) { | |
842 | struct iw_encode_ext *ee = (void *) extra; | |
843 | ||
7ab2485b JL |
844 | if (iwp->length < sizeof(*ee) + ee->key_len) { |
845 | err = -EFAULT; | |
846 | goto out; | |
847 | } | |
88f16db7 | 848 | } |
84149b0f DM |
849 | } |
850 | ||
42da2f94 JB |
851 | if (IW_IS_GET(cmd) && !(descr->flags & IW_DESCR_FLAG_NOMAX)) { |
852 | /* | |
853 | * If this is a GET, but not NOMAX, it means that the extra | |
854 | * data is not bounded by userspace, but by max_tokens. Thus | |
855 | * set the length to max_tokens. This matches the extra data | |
856 | * allocation. | |
857 | * The driver should fill it with the number of tokens it | |
858 | * provided, and it may check iwp->length rather than having | |
859 | * knowledge of max_tokens. If the driver doesn't change the | |
860 | * iwp->length, this ioctl just copies back max_token tokens | |
861 | * filled with zeroes. Hopefully the driver isn't claiming | |
862 | * them to be valid data. | |
863 | */ | |
864 | iwp->length = descr->max_tokens; | |
865 | } | |
866 | ||
84149b0f DM |
867 | err = handler(dev, info, (union iwreq_data *) iwp, extra); |
868 | ||
869 | iwp->length += essid_compat; | |
870 | ||
871 | /* If we have something to return to the user */ | |
872 | if (!err && IW_IS_GET(cmd)) { | |
873 | /* Check if there is enough buffer up there */ | |
874 | if (user_length < iwp->length) { | |
875 | err = -E2BIG; | |
876 | goto out; | |
877 | } | |
878 | ||
879 | if (copy_to_user(iwp->pointer, extra, | |
880 | iwp->length * | |
881 | descr->token_size)) { | |
882 | err = -EFAULT; | |
883 | goto out; | |
884 | } | |
885 | } | |
886 | ||
887 | /* Generate an event to notify listeners of the change */ | |
1014eb6e JT |
888 | if ((descr->flags & IW_DESCR_FLAG_EVENT) && |
889 | ((err == 0) || (err == -EIWCOMMIT))) { | |
84149b0f DM |
890 | union iwreq_data *data = (union iwreq_data *) iwp; |
891 | ||
892 | if (descr->flags & IW_DESCR_FLAG_RESTRICT) | |
893 | /* If the event is restricted, don't | |
894 | * export the payload. | |
895 | */ | |
896 | wireless_send_event(dev, cmd, data, NULL); | |
897 | else | |
898 | wireless_send_event(dev, cmd, data, extra); | |
899 | } | |
900 | ||
901 | out: | |
902 | kfree(extra); | |
903 | return err; | |
904 | } | |
905 | ||
1da177e4 | 906 | /* |
3d23e349 JB |
907 | * Call the commit handler in the driver |
908 | * (if exist and if conditions are right) | |
909 | * | |
910 | * Note : our current commit strategy is currently pretty dumb, | |
911 | * but we will be able to improve on that... | |
912 | * The goal is to try to agreagate as many changes as possible | |
913 | * before doing the commit. Drivers that will define a commit handler | |
914 | * are usually those that need a reset after changing parameters, so | |
915 | * we want to minimise the number of reset. | |
916 | * A cool idea is to use a timer : at each "set" command, we re-set the | |
917 | * timer, when the timer eventually fires, we call the driver. | |
918 | * Hopefully, more on that later. | |
919 | * | |
920 | * Also, I'm waiting to see how many people will complain about the | |
921 | * netif_running(dev) test. I'm open on that one... | |
922 | * Hopefully, the driver will remember to do a commit in "open()" ;-) | |
1da177e4 | 923 | */ |
3d23e349 | 924 | int call_commit_handler(struct net_device *dev) |
1da177e4 | 925 | { |
3d23e349 | 926 | #ifdef CONFIG_WIRELESS_EXT |
51225651 JB |
927 | if (netif_running(dev) && |
928 | dev->wireless_handlers && | |
929 | dev->wireless_handlers->standard[0]) | |
3d23e349 JB |
930 | /* Call the commit handler on the driver */ |
931 | return dev->wireless_handlers->standard[0](dev, NULL, | |
932 | NULL, NULL); | |
933 | else | |
934 | return 0; /* Command completed successfully */ | |
935 | #else | |
936 | /* cfg80211 has no commit */ | |
937 | return 0; | |
938 | #endif | |
1da177e4 LT |
939 | } |
940 | ||
1da177e4 | 941 | /* |
295f4a1f | 942 | * Main IOCTl dispatcher. |
1da177e4 LT |
943 | * Check the type of IOCTL and call the appropriate wrapper... |
944 | */ | |
4f39a1f5 | 945 | static int wireless_process_ioctl(struct net *net, struct iwreq *iwr, |
ca1e8bb8 | 946 | unsigned int cmd, |
0f5cabba | 947 | struct iw_request_info *info, |
ca1e8bb8 DM |
948 | wext_ioctl_func standard, |
949 | wext_ioctl_func private) | |
1da177e4 LT |
950 | { |
951 | struct net_device *dev; | |
952 | iw_handler handler; | |
953 | ||
954 | /* Permissions are already checked in dev_ioctl() before calling us. | |
955 | * The copy_to/from_user() of ifr is also dealt with in there */ | |
956 | ||
957 | /* Make sure the device exist */ | |
4f39a1f5 | 958 | if ((dev = __dev_get_by_name(net, iwr->ifr_name)) == NULL) |
1da177e4 LT |
959 | return -ENODEV; |
960 | ||
961 | /* A bunch of special cases, then the generic case... | |
962 | * Note that 'cmd' is already filtered in dev_ioctl() with | |
963 | * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */ | |
dd8ceabc | 964 | if (cmd == SIOCGIWSTATS) |
0f5cabba | 965 | return standard(dev, iwr, cmd, info, |
ca1e8bb8 | 966 | &iw_handler_get_iwstats); |
e71a4783 | 967 | |
3d23e349 | 968 | #ifdef CONFIG_WEXT_PRIV |
dd8ceabc | 969 | if (cmd == SIOCGIWPRIV && dev->wireless_handlers) |
0f5cabba | 970 | return standard(dev, iwr, cmd, info, |
3d23e349 JB |
971 | iw_handler_get_private); |
972 | #endif | |
dd8ceabc JB |
973 | |
974 | /* Basic check */ | |
975 | if (!netif_device_present(dev)) | |
976 | return -ENODEV; | |
977 | ||
978 | /* New driver API : try to find the handler */ | |
979 | handler = get_handler(dev, cmd); | |
980 | if (handler) { | |
981 | /* Standard and private are not the same */ | |
982 | if (cmd < SIOCIWFIRSTPRIV) | |
0f5cabba | 983 | return standard(dev, iwr, cmd, info, handler); |
3d23e349 | 984 | else if (private) |
0f5cabba | 985 | return private(dev, iwr, cmd, info, handler); |
1da177e4 | 986 | } |
dd8ceabc | 987 | return -EOPNOTSUPP; |
1da177e4 LT |
988 | } |
989 | ||
67dd7608 DM |
990 | /* If command is `set a parameter', or `get the encoding parameters', |
991 | * check if the user has the right to do it. | |
992 | */ | |
993 | static int wext_permission_check(unsigned int cmd) | |
994 | { | |
f64f9e71 JP |
995 | if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || |
996 | cmd == SIOCGIWENCODEEXT) && | |
997 | !capable(CAP_NET_ADMIN)) | |
67dd7608 DM |
998 | return -EPERM; |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | ||
295f4a1f | 1003 | /* entry point from dev ioctl */ |
4f39a1f5 | 1004 | static int wext_ioctl_dispatch(struct net *net, struct iwreq *iwr, |
0f5cabba | 1005 | unsigned int cmd, struct iw_request_info *info, |
a67fa76d DM |
1006 | wext_ioctl_func standard, |
1007 | wext_ioctl_func private) | |
295f4a1f | 1008 | { |
67dd7608 | 1009 | int ret = wext_permission_check(cmd); |
295f4a1f | 1010 | |
67dd7608 DM |
1011 | if (ret) |
1012 | return ret; | |
dd8ceabc | 1013 | |
4f39a1f5 | 1014 | dev_load(net, iwr->ifr_name); |
295f4a1f | 1015 | rtnl_lock(); |
4f39a1f5 | 1016 | ret = wireless_process_ioctl(net, iwr, cmd, info, standard, private); |
295f4a1f | 1017 | rtnl_unlock(); |
a67fa76d DM |
1018 | |
1019 | return ret; | |
1020 | } | |
1021 | ||
3d23e349 JB |
1022 | /* |
1023 | * Wrapper to call a standard Wireless Extension handler. | |
1024 | * We do various checks and also take care of moving data between | |
1025 | * user space and kernel space. | |
1026 | */ | |
1027 | static int ioctl_standard_call(struct net_device * dev, | |
1028 | struct iwreq *iwr, | |
1029 | unsigned int cmd, | |
1030 | struct iw_request_info *info, | |
1031 | iw_handler handler) | |
1032 | { | |
1033 | const struct iw_ioctl_description * descr; | |
1034 | int ret = -EINVAL; | |
1035 | ||
1036 | /* Get the description of the IOCTL */ | |
44608f80 | 1037 | if (IW_IOCTL_IDX(cmd) >= standard_ioctl_num) |
3d23e349 | 1038 | return -EOPNOTSUPP; |
44608f80 | 1039 | descr = &(standard_ioctl[IW_IOCTL_IDX(cmd)]); |
3d23e349 JB |
1040 | |
1041 | /* Check if we have a pointer to user space data or not */ | |
1042 | if (descr->header_type != IW_HEADER_TYPE_POINT) { | |
1043 | ||
1044 | /* No extra arguments. Trivial to handle */ | |
1045 | ret = handler(dev, info, &(iwr->u), NULL); | |
1046 | ||
1047 | /* Generate an event to notify listeners of the change */ | |
1048 | if ((descr->flags & IW_DESCR_FLAG_EVENT) && | |
1049 | ((ret == 0) || (ret == -EIWCOMMIT))) | |
1050 | wireless_send_event(dev, cmd, &(iwr->u), NULL); | |
1051 | } else { | |
1052 | ret = ioctl_standard_iw_point(&iwr->u.data, cmd, descr, | |
1053 | handler, dev, info); | |
1054 | } | |
1055 | ||
1056 | /* Call commit handler if needed and defined */ | |
1057 | if (ret == -EIWCOMMIT) | |
1058 | ret = call_commit_handler(dev); | |
1059 | ||
1060 | /* Here, we will generate the appropriate event if needed */ | |
1061 | ||
1062 | return ret; | |
1063 | } | |
1064 | ||
1065 | ||
b1b0c245 | 1066 | int wext_handle_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
a67fa76d | 1067 | { |
0f5cabba | 1068 | struct iw_request_info info = { .cmd = cmd, .flags = 0 }; |
b1b0c245 | 1069 | struct iwreq iwr; |
0f5cabba | 1070 | int ret; |
a67fa76d | 1071 | |
b1b0c245 AV |
1072 | if (copy_from_user(&iwr, arg, sizeof(iwr))) |
1073 | return -EFAULT; | |
1074 | ||
1075 | iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0; | |
1076 | ||
1077 | ret = wext_ioctl_dispatch(net, &iwr, cmd, &info, | |
0f5cabba DM |
1078 | ioctl_standard_call, |
1079 | ioctl_private_call); | |
a67fa76d DM |
1080 | if (ret >= 0 && |
1081 | IW_IS_GET(cmd) && | |
b1b0c245 | 1082 | copy_to_user(arg, &iwr, sizeof(struct iwreq))) |
295f4a1f | 1083 | return -EFAULT; |
a67fa76d | 1084 | |
295f4a1f JB |
1085 | return ret; |
1086 | } | |
711e2c33 | 1087 | |
87de87d5 DM |
1088 | #ifdef CONFIG_COMPAT |
1089 | static int compat_standard_call(struct net_device *dev, | |
1090 | struct iwreq *iwr, | |
1091 | unsigned int cmd, | |
0f5cabba | 1092 | struct iw_request_info *info, |
87de87d5 DM |
1093 | iw_handler handler) |
1094 | { | |
1095 | const struct iw_ioctl_description *descr; | |
1096 | struct compat_iw_point *iwp_compat; | |
87de87d5 DM |
1097 | struct iw_point iwp; |
1098 | int err; | |
1099 | ||
44608f80 | 1100 | descr = standard_ioctl + IW_IOCTL_IDX(cmd); |
87de87d5 DM |
1101 | |
1102 | if (descr->header_type != IW_HEADER_TYPE_POINT) | |
0f5cabba | 1103 | return ioctl_standard_call(dev, iwr, cmd, info, handler); |
87de87d5 DM |
1104 | |
1105 | iwp_compat = (struct compat_iw_point *) &iwr->u.data; | |
1106 | iwp.pointer = compat_ptr(iwp_compat->pointer); | |
1107 | iwp.length = iwp_compat->length; | |
1108 | iwp.flags = iwp_compat->flags; | |
1109 | ||
0f5cabba | 1110 | err = ioctl_standard_iw_point(&iwp, cmd, descr, handler, dev, info); |
87de87d5 DM |
1111 | |
1112 | iwp_compat->pointer = ptr_to_compat(iwp.pointer); | |
1113 | iwp_compat->length = iwp.length; | |
1114 | iwp_compat->flags = iwp.flags; | |
1115 | ||
1116 | return err; | |
1117 | } | |
1118 | ||
87de87d5 DM |
1119 | int compat_wext_handle_ioctl(struct net *net, unsigned int cmd, |
1120 | unsigned long arg) | |
1121 | { | |
1122 | void __user *argp = (void __user *)arg; | |
0f5cabba | 1123 | struct iw_request_info info; |
87de87d5 DM |
1124 | struct iwreq iwr; |
1125 | char *colon; | |
1126 | int ret; | |
1127 | ||
1128 | if (copy_from_user(&iwr, argp, sizeof(struct iwreq))) | |
1129 | return -EFAULT; | |
1130 | ||
1131 | iwr.ifr_name[IFNAMSIZ-1] = 0; | |
1132 | colon = strchr(iwr.ifr_name, ':'); | |
1133 | if (colon) | |
1134 | *colon = 0; | |
1135 | ||
0f5cabba DM |
1136 | info.cmd = cmd; |
1137 | info.flags = IW_REQUEST_FLAG_COMPAT; | |
1138 | ||
4f39a1f5 | 1139 | ret = wext_ioctl_dispatch(net, &iwr, cmd, &info, |
87de87d5 DM |
1140 | compat_standard_call, |
1141 | compat_private_call); | |
1142 | ||
1143 | if (ret >= 0 && | |
1144 | IW_IS_GET(cmd) && | |
1145 | copy_to_user(argp, &iwr, sizeof(struct iwreq))) | |
1146 | return -EFAULT; | |
1147 | ||
1148 | return ret; | |
1149 | } | |
1150 | #endif | |
10b2eb69 JB |
1151 | |
1152 | char *iwe_stream_add_event(struct iw_request_info *info, char *stream, | |
1153 | char *ends, struct iw_event *iwe, int event_len) | |
1154 | { | |
1155 | int lcp_len = iwe_stream_lcp_len(info); | |
1156 | ||
1157 | event_len = iwe_stream_event_len_adjust(info, event_len); | |
1158 | ||
1159 | /* Check if it's possible */ | |
1160 | if (likely((stream + event_len) < ends)) { | |
1161 | iwe->len = event_len; | |
1162 | /* Beware of alignement issues on 64 bits */ | |
1163 | memcpy(stream, (char *) iwe, IW_EV_LCP_PK_LEN); | |
1164 | memcpy(stream + lcp_len, &iwe->u, | |
1165 | event_len - lcp_len); | |
1166 | stream += event_len; | |
1167 | } | |
1168 | ||
1169 | return stream; | |
1170 | } | |
1171 | EXPORT_SYMBOL(iwe_stream_add_event); | |
1172 | ||
1173 | char *iwe_stream_add_point(struct iw_request_info *info, char *stream, | |
1174 | char *ends, struct iw_event *iwe, char *extra) | |
1175 | { | |
1176 | int event_len = iwe_stream_point_len(info) + iwe->u.data.length; | |
1177 | int point_len = iwe_stream_point_len(info); | |
1178 | int lcp_len = iwe_stream_lcp_len(info); | |
1179 | ||
1180 | /* Check if it's possible */ | |
1181 | if (likely((stream + event_len) < ends)) { | |
1182 | iwe->len = event_len; | |
1183 | memcpy(stream, (char *) iwe, IW_EV_LCP_PK_LEN); | |
1184 | memcpy(stream + lcp_len, | |
1185 | ((char *) &iwe->u) + IW_EV_POINT_OFF, | |
1186 | IW_EV_POINT_PK_LEN - IW_EV_LCP_PK_LEN); | |
1187 | if (iwe->u.data.length && extra) | |
1188 | memcpy(stream + point_len, extra, iwe->u.data.length); | |
1189 | stream += event_len; | |
1190 | } | |
1191 | ||
1192 | return stream; | |
1193 | } | |
1194 | EXPORT_SYMBOL(iwe_stream_add_point); | |
1195 | ||
1196 | char *iwe_stream_add_value(struct iw_request_info *info, char *event, | |
1197 | char *value, char *ends, struct iw_event *iwe, | |
1198 | int event_len) | |
1199 | { | |
1200 | int lcp_len = iwe_stream_lcp_len(info); | |
1201 | ||
1202 | /* Don't duplicate LCP */ | |
1203 | event_len -= IW_EV_LCP_LEN; | |
1204 | ||
1205 | /* Check if it's possible */ | |
1206 | if (likely((value + event_len) < ends)) { | |
1207 | /* Add new value */ | |
1208 | memcpy(value, &iwe->u, event_len); | |
1209 | value += event_len; | |
1210 | /* Patch LCP */ | |
1211 | iwe->len = value - event; | |
1212 | memcpy(event, (char *) iwe, lcp_len); | |
1213 | } | |
1214 | ||
1215 | return value; | |
1216 | } | |
1217 | EXPORT_SYMBOL(iwe_stream_add_value); |