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> |
1da177e4 LT |
7 | * |
8 | * (As all part of the Linux kernel, this file is GPL) | |
9 | */ | |
3d23e349 JB |
10 | #include <linux/kernel.h> |
11 | #include <linux/netdevice.h> | |
12 | #include <linux/rtnetlink.h> | |
13 | #include <linux/wireless.h> | |
14 | #include <linux/uaccess.h> | |
15 | #include <net/cfg80211.h> | |
16 | #include <net/iw_handler.h> | |
bd5785ba | 17 | #include <net/netlink.h> |
295f4a1f | 18 | #include <net/wext.h> |
3d23e349 JB |
19 | #include <net/net_namespace.h> |
20 | ||
21 | typedef int (*wext_ioctl_func)(struct net_device *, struct iwreq *, | |
22 | unsigned int, struct iw_request_info *, | |
23 | iw_handler); | |
1da177e4 | 24 | |
1da177e4 | 25 | |
1da177e4 LT |
26 | /* |
27 | * Meta-data about all the standard Wireless Extension request we | |
28 | * know about. | |
29 | */ | |
30 | static const struct iw_ioctl_description standard_ioctl[] = { | |
31 | [SIOCSIWCOMMIT - SIOCIWFIRST] = { | |
32 | .header_type = IW_HEADER_TYPE_NULL, | |
33 | }, | |
34 | [SIOCGIWNAME - SIOCIWFIRST] = { | |
35 | .header_type = IW_HEADER_TYPE_CHAR, | |
36 | .flags = IW_DESCR_FLAG_DUMP, | |
37 | }, | |
38 | [SIOCSIWNWID - SIOCIWFIRST] = { | |
39 | .header_type = IW_HEADER_TYPE_PARAM, | |
40 | .flags = IW_DESCR_FLAG_EVENT, | |
41 | }, | |
42 | [SIOCGIWNWID - SIOCIWFIRST] = { | |
43 | .header_type = IW_HEADER_TYPE_PARAM, | |
44 | .flags = IW_DESCR_FLAG_DUMP, | |
45 | }, | |
46 | [SIOCSIWFREQ - SIOCIWFIRST] = { | |
47 | .header_type = IW_HEADER_TYPE_FREQ, | |
48 | .flags = IW_DESCR_FLAG_EVENT, | |
49 | }, | |
50 | [SIOCGIWFREQ - SIOCIWFIRST] = { | |
51 | .header_type = IW_HEADER_TYPE_FREQ, | |
52 | .flags = IW_DESCR_FLAG_DUMP, | |
53 | }, | |
54 | [SIOCSIWMODE - SIOCIWFIRST] = { | |
55 | .header_type = IW_HEADER_TYPE_UINT, | |
56 | .flags = IW_DESCR_FLAG_EVENT, | |
57 | }, | |
58 | [SIOCGIWMODE - SIOCIWFIRST] = { | |
59 | .header_type = IW_HEADER_TYPE_UINT, | |
60 | .flags = IW_DESCR_FLAG_DUMP, | |
61 | }, | |
62 | [SIOCSIWSENS - SIOCIWFIRST] = { | |
63 | .header_type = IW_HEADER_TYPE_PARAM, | |
64 | }, | |
65 | [SIOCGIWSENS - SIOCIWFIRST] = { | |
66 | .header_type = IW_HEADER_TYPE_PARAM, | |
67 | }, | |
68 | [SIOCSIWRANGE - SIOCIWFIRST] = { | |
69 | .header_type = IW_HEADER_TYPE_NULL, | |
70 | }, | |
71 | [SIOCGIWRANGE - SIOCIWFIRST] = { | |
72 | .header_type = IW_HEADER_TYPE_POINT, | |
73 | .token_size = 1, | |
74 | .max_tokens = sizeof(struct iw_range), | |
75 | .flags = IW_DESCR_FLAG_DUMP, | |
76 | }, | |
77 | [SIOCSIWPRIV - SIOCIWFIRST] = { | |
78 | .header_type = IW_HEADER_TYPE_NULL, | |
79 | }, | |
80 | [SIOCGIWPRIV - SIOCIWFIRST] = { /* (handled directly by us) */ | |
711e2c33 JT |
81 | .header_type = IW_HEADER_TYPE_POINT, |
82 | .token_size = sizeof(struct iw_priv_args), | |
83 | .max_tokens = 16, | |
84 | .flags = IW_DESCR_FLAG_NOMAX, | |
1da177e4 LT |
85 | }, |
86 | [SIOCSIWSTATS - SIOCIWFIRST] = { | |
87 | .header_type = IW_HEADER_TYPE_NULL, | |
88 | }, | |
89 | [SIOCGIWSTATS - SIOCIWFIRST] = { /* (handled directly by us) */ | |
711e2c33 JT |
90 | .header_type = IW_HEADER_TYPE_POINT, |
91 | .token_size = 1, | |
92 | .max_tokens = sizeof(struct iw_statistics), | |
1da177e4 LT |
93 | .flags = IW_DESCR_FLAG_DUMP, |
94 | }, | |
95 | [SIOCSIWSPY - SIOCIWFIRST] = { | |
96 | .header_type = IW_HEADER_TYPE_POINT, | |
97 | .token_size = sizeof(struct sockaddr), | |
98 | .max_tokens = IW_MAX_SPY, | |
99 | }, | |
100 | [SIOCGIWSPY - SIOCIWFIRST] = { | |
101 | .header_type = IW_HEADER_TYPE_POINT, | |
102 | .token_size = sizeof(struct sockaddr) + | |
103 | sizeof(struct iw_quality), | |
104 | .max_tokens = IW_MAX_SPY, | |
105 | }, | |
106 | [SIOCSIWTHRSPY - SIOCIWFIRST] = { | |
107 | .header_type = IW_HEADER_TYPE_POINT, | |
108 | .token_size = sizeof(struct iw_thrspy), | |
109 | .min_tokens = 1, | |
110 | .max_tokens = 1, | |
111 | }, | |
112 | [SIOCGIWTHRSPY - SIOCIWFIRST] = { | |
113 | .header_type = IW_HEADER_TYPE_POINT, | |
114 | .token_size = sizeof(struct iw_thrspy), | |
115 | .min_tokens = 1, | |
116 | .max_tokens = 1, | |
117 | }, | |
118 | [SIOCSIWAP - SIOCIWFIRST] = { | |
119 | .header_type = IW_HEADER_TYPE_ADDR, | |
120 | }, | |
121 | [SIOCGIWAP - SIOCIWFIRST] = { | |
122 | .header_type = IW_HEADER_TYPE_ADDR, | |
123 | .flags = IW_DESCR_FLAG_DUMP, | |
124 | }, | |
fff9cfd9 | 125 | [SIOCSIWMLME - SIOCIWFIRST] = { |
126 | .header_type = IW_HEADER_TYPE_POINT, | |
127 | .token_size = 1, | |
128 | .min_tokens = sizeof(struct iw_mlme), | |
129 | .max_tokens = sizeof(struct iw_mlme), | |
130 | }, | |
1da177e4 LT |
131 | [SIOCGIWAPLIST - SIOCIWFIRST] = { |
132 | .header_type = IW_HEADER_TYPE_POINT, | |
133 | .token_size = sizeof(struct sockaddr) + | |
134 | sizeof(struct iw_quality), | |
135 | .max_tokens = IW_MAX_AP, | |
136 | .flags = IW_DESCR_FLAG_NOMAX, | |
137 | }, | |
138 | [SIOCSIWSCAN - SIOCIWFIRST] = { | |
fff9cfd9 | 139 | .header_type = IW_HEADER_TYPE_POINT, |
140 | .token_size = 1, | |
141 | .min_tokens = 0, | |
142 | .max_tokens = sizeof(struct iw_scan_req), | |
1da177e4 LT |
143 | }, |
144 | [SIOCGIWSCAN - SIOCIWFIRST] = { | |
145 | .header_type = IW_HEADER_TYPE_POINT, | |
146 | .token_size = 1, | |
147 | .max_tokens = IW_SCAN_MAX_DATA, | |
148 | .flags = IW_DESCR_FLAG_NOMAX, | |
149 | }, | |
150 | [SIOCSIWESSID - SIOCIWFIRST] = { | |
151 | .header_type = IW_HEADER_TYPE_POINT, | |
152 | .token_size = 1, | |
baef1865 | 153 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
154 | .flags = IW_DESCR_FLAG_EVENT, |
155 | }, | |
156 | [SIOCGIWESSID - SIOCIWFIRST] = { | |
157 | .header_type = IW_HEADER_TYPE_POINT, | |
158 | .token_size = 1, | |
baef1865 | 159 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
160 | .flags = IW_DESCR_FLAG_DUMP, |
161 | }, | |
162 | [SIOCSIWNICKN - SIOCIWFIRST] = { | |
163 | .header_type = IW_HEADER_TYPE_POINT, | |
164 | .token_size = 1, | |
baef1865 | 165 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
166 | }, |
167 | [SIOCGIWNICKN - SIOCIWFIRST] = { | |
168 | .header_type = IW_HEADER_TYPE_POINT, | |
169 | .token_size = 1, | |
baef1865 | 170 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
171 | }, |
172 | [SIOCSIWRATE - SIOCIWFIRST] = { | |
173 | .header_type = IW_HEADER_TYPE_PARAM, | |
174 | }, | |
175 | [SIOCGIWRATE - SIOCIWFIRST] = { | |
176 | .header_type = IW_HEADER_TYPE_PARAM, | |
177 | }, | |
178 | [SIOCSIWRTS - SIOCIWFIRST] = { | |
179 | .header_type = IW_HEADER_TYPE_PARAM, | |
180 | }, | |
181 | [SIOCGIWRTS - SIOCIWFIRST] = { | |
182 | .header_type = IW_HEADER_TYPE_PARAM, | |
183 | }, | |
184 | [SIOCSIWFRAG - SIOCIWFIRST] = { | |
185 | .header_type = IW_HEADER_TYPE_PARAM, | |
186 | }, | |
187 | [SIOCGIWFRAG - SIOCIWFIRST] = { | |
188 | .header_type = IW_HEADER_TYPE_PARAM, | |
189 | }, | |
190 | [SIOCSIWTXPOW - SIOCIWFIRST] = { | |
191 | .header_type = IW_HEADER_TYPE_PARAM, | |
192 | }, | |
193 | [SIOCGIWTXPOW - SIOCIWFIRST] = { | |
194 | .header_type = IW_HEADER_TYPE_PARAM, | |
195 | }, | |
196 | [SIOCSIWRETRY - SIOCIWFIRST] = { | |
197 | .header_type = IW_HEADER_TYPE_PARAM, | |
198 | }, | |
199 | [SIOCGIWRETRY - SIOCIWFIRST] = { | |
200 | .header_type = IW_HEADER_TYPE_PARAM, | |
201 | }, | |
202 | [SIOCSIWENCODE - SIOCIWFIRST] = { | |
203 | .header_type = IW_HEADER_TYPE_POINT, | |
204 | .token_size = 1, | |
205 | .max_tokens = IW_ENCODING_TOKEN_MAX, | |
206 | .flags = IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT, | |
207 | }, | |
208 | [SIOCGIWENCODE - SIOCIWFIRST] = { | |
209 | .header_type = IW_HEADER_TYPE_POINT, | |
210 | .token_size = 1, | |
211 | .max_tokens = IW_ENCODING_TOKEN_MAX, | |
212 | .flags = IW_DESCR_FLAG_DUMP | IW_DESCR_FLAG_RESTRICT, | |
213 | }, | |
214 | [SIOCSIWPOWER - SIOCIWFIRST] = { | |
215 | .header_type = IW_HEADER_TYPE_PARAM, | |
216 | }, | |
217 | [SIOCGIWPOWER - SIOCIWFIRST] = { | |
218 | .header_type = IW_HEADER_TYPE_PARAM, | |
219 | }, | |
fff9cfd9 | 220 | [SIOCSIWGENIE - SIOCIWFIRST] = { |
221 | .header_type = IW_HEADER_TYPE_POINT, | |
222 | .token_size = 1, | |
223 | .max_tokens = IW_GENERIC_IE_MAX, | |
224 | }, | |
225 | [SIOCGIWGENIE - SIOCIWFIRST] = { | |
226 | .header_type = IW_HEADER_TYPE_POINT, | |
227 | .token_size = 1, | |
228 | .max_tokens = IW_GENERIC_IE_MAX, | |
229 | }, | |
230 | [SIOCSIWAUTH - SIOCIWFIRST] = { | |
231 | .header_type = IW_HEADER_TYPE_PARAM, | |
232 | }, | |
233 | [SIOCGIWAUTH - SIOCIWFIRST] = { | |
234 | .header_type = IW_HEADER_TYPE_PARAM, | |
235 | }, | |
236 | [SIOCSIWENCODEEXT - SIOCIWFIRST] = { | |
237 | .header_type = IW_HEADER_TYPE_POINT, | |
238 | .token_size = 1, | |
239 | .min_tokens = sizeof(struct iw_encode_ext), | |
240 | .max_tokens = sizeof(struct iw_encode_ext) + | |
241 | IW_ENCODING_TOKEN_MAX, | |
242 | }, | |
243 | [SIOCGIWENCODEEXT - SIOCIWFIRST] = { | |
244 | .header_type = IW_HEADER_TYPE_POINT, | |
245 | .token_size = 1, | |
246 | .min_tokens = sizeof(struct iw_encode_ext), | |
247 | .max_tokens = sizeof(struct iw_encode_ext) + | |
248 | IW_ENCODING_TOKEN_MAX, | |
249 | }, | |
250 | [SIOCSIWPMKSA - SIOCIWFIRST] = { | |
251 | .header_type = IW_HEADER_TYPE_POINT, | |
252 | .token_size = 1, | |
253 | .min_tokens = sizeof(struct iw_pmksa), | |
254 | .max_tokens = sizeof(struct iw_pmksa), | |
255 | }, | |
1da177e4 | 256 | }; |
1ac58ee3 | 257 | static const unsigned standard_ioctl_num = ARRAY_SIZE(standard_ioctl); |
1da177e4 LT |
258 | |
259 | /* | |
260 | * Meta-data about all the additional standard Wireless Extension events | |
261 | * we know about. | |
262 | */ | |
263 | static const struct iw_ioctl_description standard_event[] = { | |
264 | [IWEVTXDROP - IWEVFIRST] = { | |
265 | .header_type = IW_HEADER_TYPE_ADDR, | |
266 | }, | |
267 | [IWEVQUAL - IWEVFIRST] = { | |
268 | .header_type = IW_HEADER_TYPE_QUAL, | |
269 | }, | |
270 | [IWEVCUSTOM - IWEVFIRST] = { | |
271 | .header_type = IW_HEADER_TYPE_POINT, | |
272 | .token_size = 1, | |
273 | .max_tokens = IW_CUSTOM_MAX, | |
274 | }, | |
275 | [IWEVREGISTERED - IWEVFIRST] = { | |
276 | .header_type = IW_HEADER_TYPE_ADDR, | |
277 | }, | |
278 | [IWEVEXPIRED - IWEVFIRST] = { | |
4ec93edb | 279 | .header_type = IW_HEADER_TYPE_ADDR, |
1da177e4 | 280 | }, |
fff9cfd9 | 281 | [IWEVGENIE - IWEVFIRST] = { |
282 | .header_type = IW_HEADER_TYPE_POINT, | |
283 | .token_size = 1, | |
284 | .max_tokens = IW_GENERIC_IE_MAX, | |
285 | }, | |
286 | [IWEVMICHAELMICFAILURE - IWEVFIRST] = { | |
4ec93edb | 287 | .header_type = IW_HEADER_TYPE_POINT, |
fff9cfd9 | 288 | .token_size = 1, |
289 | .max_tokens = sizeof(struct iw_michaelmicfailure), | |
290 | }, | |
291 | [IWEVASSOCREQIE - IWEVFIRST] = { | |
292 | .header_type = IW_HEADER_TYPE_POINT, | |
293 | .token_size = 1, | |
294 | .max_tokens = IW_GENERIC_IE_MAX, | |
295 | }, | |
296 | [IWEVASSOCRESPIE - IWEVFIRST] = { | |
297 | .header_type = IW_HEADER_TYPE_POINT, | |
298 | .token_size = 1, | |
299 | .max_tokens = IW_GENERIC_IE_MAX, | |
300 | }, | |
301 | [IWEVPMKIDCAND - IWEVFIRST] = { | |
302 | .header_type = IW_HEADER_TYPE_POINT, | |
303 | .token_size = 1, | |
304 | .max_tokens = sizeof(struct iw_pmkid_cand), | |
305 | }, | |
1da177e4 | 306 | }; |
1ac58ee3 | 307 | static const unsigned standard_event_num = ARRAY_SIZE(standard_event); |
1da177e4 | 308 | |
1da177e4 LT |
309 | /* Size (in bytes) of various events */ |
310 | static const int event_type_size[] = { | |
311 | IW_EV_LCP_LEN, /* IW_HEADER_TYPE_NULL */ | |
312 | 0, | |
313 | IW_EV_CHAR_LEN, /* IW_HEADER_TYPE_CHAR */ | |
314 | 0, | |
315 | IW_EV_UINT_LEN, /* IW_HEADER_TYPE_UINT */ | |
316 | IW_EV_FREQ_LEN, /* IW_HEADER_TYPE_FREQ */ | |
317 | IW_EV_ADDR_LEN, /* IW_HEADER_TYPE_ADDR */ | |
318 | 0, | |
319 | IW_EV_POINT_LEN, /* Without variable payload */ | |
320 | IW_EV_PARAM_LEN, /* IW_HEADER_TYPE_PARAM */ | |
321 | IW_EV_QUAL_LEN, /* IW_HEADER_TYPE_QUAL */ | |
322 | }; | |
323 | ||
1dacc76d JB |
324 | #ifdef CONFIG_COMPAT |
325 | static const int compat_event_type_size[] = { | |
326 | IW_EV_COMPAT_LCP_LEN, /* IW_HEADER_TYPE_NULL */ | |
327 | 0, | |
328 | IW_EV_COMPAT_CHAR_LEN, /* IW_HEADER_TYPE_CHAR */ | |
329 | 0, | |
330 | IW_EV_COMPAT_UINT_LEN, /* IW_HEADER_TYPE_UINT */ | |
331 | IW_EV_COMPAT_FREQ_LEN, /* IW_HEADER_TYPE_FREQ */ | |
332 | IW_EV_COMPAT_ADDR_LEN, /* IW_HEADER_TYPE_ADDR */ | |
333 | 0, | |
334 | IW_EV_COMPAT_POINT_LEN, /* Without variable payload */ | |
335 | IW_EV_COMPAT_PARAM_LEN, /* IW_HEADER_TYPE_PARAM */ | |
336 | IW_EV_COMPAT_QUAL_LEN, /* IW_HEADER_TYPE_QUAL */ | |
337 | }; | |
338 | #endif | |
c2805fbb | 339 | |
1da177e4 | 340 | |
3d23e349 | 341 | /* IW event code */ |
1da177e4 | 342 | |
3d23e349 | 343 | static int __net_init wext_pernet_init(struct net *net) |
711e2c33 | 344 | { |
3d23e349 JB |
345 | skb_queue_head_init(&net->wext_nlevents); |
346 | return 0; | |
711e2c33 JT |
347 | } |
348 | ||
3d23e349 | 349 | static void __net_exit wext_pernet_exit(struct net *net) |
711e2c33 | 350 | { |
3d23e349 | 351 | skb_queue_purge(&net->wext_nlevents); |
711e2c33 JT |
352 | } |
353 | ||
3d23e349 JB |
354 | static struct pernet_operations wext_pernet_ops = { |
355 | .init = wext_pernet_init, | |
356 | .exit = wext_pernet_exit, | |
357 | }; | |
1da177e4 | 358 | |
3d23e349 | 359 | static int __init wireless_nlevent_init(void) |
1da177e4 | 360 | { |
3d23e349 | 361 | return register_pernet_subsys(&wext_pernet_ops); |
1da177e4 LT |
362 | } |
363 | ||
3d23e349 | 364 | subsys_initcall(wireless_nlevent_init); |
1da177e4 | 365 | |
3d23e349 JB |
366 | /* Process events generated by the wireless layer or the driver. */ |
367 | static void wireless_nlevent_process(struct work_struct *work) | |
7be69c0b | 368 | { |
3d23e349 JB |
369 | struct sk_buff *skb; |
370 | struct net *net; | |
87057825 | 371 | |
7be69c0b | 372 | rtnl_lock(); |
87057825 | 373 | |
3d23e349 JB |
374 | for_each_net(net) { |
375 | while ((skb = skb_dequeue(&net->wext_nlevents))) | |
376 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, | |
377 | GFP_KERNEL); | |
378 | } | |
7be69c0b | 379 | |
7be69c0b JB |
380 | rtnl_unlock(); |
381 | } | |
382 | ||
3d23e349 | 383 | static DECLARE_WORK(wireless_nlevent_work, wireless_nlevent_process); |
1da177e4 | 384 | |
3d23e349 JB |
385 | static struct nlmsghdr *rtnetlink_ifinfo_prep(struct net_device *dev, |
386 | struct sk_buff *skb) | |
1da177e4 | 387 | { |
3d23e349 JB |
388 | struct ifinfomsg *r; |
389 | struct nlmsghdr *nlh; | |
1da177e4 | 390 | |
3d23e349 JB |
391 | nlh = nlmsg_put(skb, 0, 0, RTM_NEWLINK, sizeof(*r), 0); |
392 | if (!nlh) | |
393 | return NULL; | |
1da177e4 | 394 | |
3d23e349 JB |
395 | r = nlmsg_data(nlh); |
396 | r->ifi_family = AF_UNSPEC; | |
397 | r->__ifi_pad = 0; | |
398 | r->ifi_type = dev->type; | |
399 | r->ifi_index = dev->ifindex; | |
400 | r->ifi_flags = dev_get_flags(dev); | |
401 | r->ifi_change = 0; /* Wireless changes don't affect those flags */ | |
1da177e4 | 402 | |
3d23e349 | 403 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); |
881d966b | 404 | |
3d23e349 JB |
405 | return nlh; |
406 | nla_put_failure: | |
407 | nlmsg_cancel(skb, nlh); | |
408 | return NULL; | |
881d966b | 409 | } |
1da177e4 | 410 | |
3d23e349 | 411 | |
1da177e4 | 412 | /* |
3d23e349 JB |
413 | * Main event dispatcher. Called from other parts and drivers. |
414 | * Send the event on the appropriate channels. | |
415 | * May be called from interrupt context. | |
1da177e4 | 416 | */ |
3d23e349 JB |
417 | void wireless_send_event(struct net_device * dev, |
418 | unsigned int cmd, | |
419 | union iwreq_data * wrqu, | |
420 | const char * extra) | |
84149b0f | 421 | { |
3d23e349 JB |
422 | const struct iw_ioctl_description * descr = NULL; |
423 | int extra_len = 0; | |
424 | struct iw_event *event; /* Mallocated whole event */ | |
425 | int event_len; /* Its size */ | |
426 | int hdr_len; /* Size of the event header */ | |
427 | int wrqu_off = 0; /* Offset in wrqu */ | |
428 | /* Don't "optimise" the following variable, it will crash */ | |
429 | unsigned cmd_index; /* *MUST* be unsigned */ | |
430 | struct sk_buff *skb; | |
431 | struct nlmsghdr *nlh; | |
432 | struct nlattr *nla; | |
433 | #ifdef CONFIG_COMPAT | |
434 | struct __compat_iw_event *compat_event; | |
435 | struct compat_iw_point compat_wrqu; | |
436 | struct sk_buff *compskb; | |
437 | #endif | |
84149b0f | 438 | |
3d23e349 JB |
439 | /* |
440 | * Nothing in the kernel sends scan events with data, be safe. | |
441 | * This is necessary because we cannot fix up scan event data | |
442 | * for compat, due to being contained in 'extra', but normally | |
443 | * applications are required to retrieve the scan data anyway | |
444 | * and no data is included in the event, this codifies that | |
445 | * practice. | |
84149b0f | 446 | */ |
3d23e349 JB |
447 | if (WARN_ON(cmd == SIOCGIWSCAN && extra)) |
448 | extra = NULL; | |
84149b0f | 449 | |
3d23e349 JB |
450 | /* Get the description of the Event */ |
451 | if (cmd <= SIOCIWLAST) { | |
452 | cmd_index = cmd - SIOCIWFIRST; | |
453 | if (cmd_index < standard_ioctl_num) | |
454 | descr = &(standard_ioctl[cmd_index]); | |
455 | } else { | |
456 | cmd_index = cmd - IWEVFIRST; | |
457 | if (cmd_index < standard_event_num) | |
458 | descr = &(standard_event[cmd_index]); | |
459 | } | |
460 | /* Don't accept unknown events */ | |
461 | if (descr == NULL) { | |
462 | /* Note : we don't return an error to the driver, because | |
463 | * the driver would not know what to do about it. It can't | |
464 | * return an error to the user, because the event is not | |
465 | * initiated by a user request. | |
466 | * The best the driver could do is to log an error message. | |
467 | * We will do it ourselves instead... | |
468 | */ | |
469 | printk(KERN_ERR "%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n", | |
470 | dev->name, cmd); | |
471 | return; | |
472 | } | |
473 | ||
474 | /* Check extra parameters and set extra_len */ | |
475 | if (descr->header_type == IW_HEADER_TYPE_POINT) { | |
476 | /* Check if number of token fits within bounds */ | |
477 | if (wrqu->data.length > descr->max_tokens) { | |
478 | printk(KERN_ERR "%s (WE) : Wireless Event too big (%d)\n", dev->name, wrqu->data.length); | |
479 | return; | |
480 | } | |
481 | if (wrqu->data.length < descr->min_tokens) { | |
482 | printk(KERN_ERR "%s (WE) : Wireless Event too small (%d)\n", dev->name, wrqu->data.length); | |
483 | return; | |
484 | } | |
485 | /* Calculate extra_len - extra is NULL for restricted events */ | |
486 | if (extra != NULL) | |
487 | extra_len = wrqu->data.length * descr->token_size; | |
488 | /* Always at an offset in wrqu */ | |
489 | wrqu_off = IW_EV_POINT_OFF; | |
490 | } | |
491 | ||
492 | /* Total length of the event */ | |
493 | hdr_len = event_type_size[descr->header_type]; | |
494 | event_len = hdr_len + extra_len; | |
495 | ||
496 | /* | |
497 | * The problem for 64/32 bit. | |
498 | * | |
499 | * On 64-bit, a regular event is laid out as follows: | |
500 | * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | | |
501 | * | event.len | event.cmd | p a d d i n g | | |
502 | * | wrqu data ... (with the correct size) | | |
503 | * | |
504 | * This padding exists because we manipulate event->u, | |
505 | * and 'event' is not packed. | |
506 | * | |
507 | * An iw_point event is laid out like this instead: | |
508 | * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | | |
509 | * | event.len | event.cmd | p a d d i n g | | |
510 | * | iwpnt.len | iwpnt.flg | p a d d i n g | | |
511 | * | extra data ... | |
512 | * | |
513 | * The second padding exists because struct iw_point is extended, | |
514 | * but this depends on the platform... | |
515 | * | |
516 | * On 32-bit, all the padding shouldn't be there. | |
517 | */ | |
518 | ||
519 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
520 | if (!skb) | |
521 | return; | |
522 | ||
523 | /* Send via the RtNetlink event channel */ | |
524 | nlh = rtnetlink_ifinfo_prep(dev, skb); | |
525 | if (WARN_ON(!nlh)) { | |
526 | kfree_skb(skb); | |
527 | return; | |
528 | } | |
529 | ||
530 | /* Add the wireless events in the netlink packet */ | |
531 | nla = nla_reserve(skb, IFLA_WIRELESS, event_len); | |
532 | if (!nla) { | |
533 | kfree_skb(skb); | |
534 | return; | |
535 | } | |
536 | event = nla_data(nla); | |
537 | ||
538 | /* Fill event - first clear to avoid data leaking */ | |
539 | memset(event, 0, hdr_len); | |
540 | event->len = event_len; | |
541 | event->cmd = cmd; | |
542 | memcpy(&event->u, ((char *) wrqu) + wrqu_off, hdr_len - IW_EV_LCP_LEN); | |
543 | if (extra_len) | |
544 | memcpy(((char *) event) + hdr_len, extra, extra_len); | |
545 | ||
546 | nlmsg_end(skb, nlh); | |
547 | #ifdef CONFIG_COMPAT | |
548 | hdr_len = compat_event_type_size[descr->header_type]; | |
549 | event_len = hdr_len + extra_len; | |
550 | ||
551 | compskb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
552 | if (!compskb) { | |
553 | kfree_skb(skb); | |
554 | return; | |
555 | } | |
556 | ||
557 | /* Send via the RtNetlink event channel */ | |
558 | nlh = rtnetlink_ifinfo_prep(dev, compskb); | |
559 | if (WARN_ON(!nlh)) { | |
560 | kfree_skb(skb); | |
561 | kfree_skb(compskb); | |
562 | return; | |
563 | } | |
564 | ||
565 | /* Add the wireless events in the netlink packet */ | |
566 | nla = nla_reserve(compskb, IFLA_WIRELESS, event_len); | |
567 | if (!nla) { | |
568 | kfree_skb(skb); | |
569 | kfree_skb(compskb); | |
570 | return; | |
571 | } | |
572 | compat_event = nla_data(nla); | |
573 | ||
574 | compat_event->len = event_len; | |
575 | compat_event->cmd = cmd; | |
576 | if (descr->header_type == IW_HEADER_TYPE_POINT) { | |
577 | compat_wrqu.length = wrqu->data.length; | |
578 | compat_wrqu.flags = wrqu->data.flags; | |
579 | memcpy(&compat_event->pointer, | |
580 | ((char *) &compat_wrqu) + IW_EV_COMPAT_POINT_OFF, | |
581 | hdr_len - IW_EV_COMPAT_LCP_LEN); | |
582 | if (extra_len) | |
583 | memcpy(((char *) compat_event) + hdr_len, | |
584 | extra, extra_len); | |
585 | } else { | |
586 | /* extra_len must be zero, so no if (extra) needed */ | |
587 | memcpy(&compat_event->pointer, wrqu, | |
588 | hdr_len - IW_EV_COMPAT_LCP_LEN); | |
589 | } | |
590 | ||
591 | nlmsg_end(compskb, nlh); | |
592 | ||
593 | skb_shinfo(skb)->frag_list = compskb; | |
594 | #endif | |
595 | skb_queue_tail(&dev_net(dev)->wext_nlevents, skb); | |
596 | schedule_work(&wireless_nlevent_work); | |
597 | } | |
598 | EXPORT_SYMBOL(wireless_send_event); | |
599 | ||
600 | ||
601 | ||
602 | /* IW handlers */ | |
603 | ||
604 | struct iw_statistics *get_wireless_stats(struct net_device *dev) | |
605 | { | |
606 | #ifdef CONFIG_WIRELESS_EXT | |
607 | if ((dev->wireless_handlers != NULL) && | |
608 | (dev->wireless_handlers->get_wireless_stats != NULL)) | |
609 | return dev->wireless_handlers->get_wireless_stats(dev); | |
610 | #endif | |
611 | ||
612 | #ifdef CONFIG_CFG80211_WEXT | |
613 | if (dev->ieee80211_ptr && dev->ieee80211_ptr && | |
614 | dev->ieee80211_ptr->wiphy && | |
615 | dev->ieee80211_ptr->wiphy->wext && | |
616 | dev->ieee80211_ptr->wiphy->wext->get_wireless_stats) | |
617 | return dev->ieee80211_ptr->wiphy->wext->get_wireless_stats(dev); | |
618 | #endif | |
619 | ||
620 | /* not found */ | |
621 | return NULL; | |
622 | } | |
623 | ||
624 | static int iw_handler_get_iwstats(struct net_device * dev, | |
625 | struct iw_request_info * info, | |
626 | union iwreq_data * wrqu, | |
627 | char * extra) | |
628 | { | |
629 | /* Get stats from the driver */ | |
630 | struct iw_statistics *stats; | |
631 | ||
632 | stats = get_wireless_stats(dev); | |
633 | if (stats) { | |
634 | /* Copy statistics to extra */ | |
635 | memcpy(extra, stats, sizeof(struct iw_statistics)); | |
636 | wrqu->data.length = sizeof(struct iw_statistics); | |
637 | ||
638 | /* Check if we need to clear the updated flag */ | |
639 | if (wrqu->data.flags != 0) | |
640 | stats->qual.updated &= ~IW_QUAL_ALL_UPDATED; | |
641 | return 0; | |
642 | } else | |
643 | return -EOPNOTSUPP; | |
644 | } | |
645 | ||
646 | static iw_handler get_handler(struct net_device *dev, unsigned int cmd) | |
647 | { | |
648 | /* Don't "optimise" the following variable, it will crash */ | |
649 | unsigned int index; /* *MUST* be unsigned */ | |
650 | const struct iw_handler_def *handlers = NULL; | |
651 | ||
652 | #ifdef CONFIG_CFG80211_WEXT | |
653 | if (dev->ieee80211_ptr && dev->ieee80211_ptr->wiphy) | |
654 | handlers = dev->ieee80211_ptr->wiphy->wext; | |
655 | #endif | |
656 | #ifdef CONFIG_WIRELESS_EXT | |
657 | if (dev->wireless_handlers) | |
658 | handlers = dev->wireless_handlers; | |
659 | #endif | |
660 | ||
661 | if (!handlers) | |
662 | return NULL; | |
663 | ||
664 | /* Try as a standard command */ | |
665 | index = cmd - SIOCIWFIRST; | |
666 | if (index < handlers->num_standard) | |
667 | return handlers->standard[index]; | |
668 | ||
669 | #ifdef CONFIG_WEXT_PRIV | |
670 | /* Try as a private command */ | |
671 | index = cmd - SIOCIWFIRSTPRIV; | |
672 | if (index < handlers->num_private) | |
673 | return handlers->private[index]; | |
674 | #endif | |
675 | ||
676 | /* Not found */ | |
677 | return NULL; | |
678 | } | |
679 | ||
680 | static int ioctl_standard_iw_point(struct iw_point *iwp, unsigned int cmd, | |
681 | const struct iw_ioctl_description *descr, | |
682 | iw_handler handler, struct net_device *dev, | |
683 | struct iw_request_info *info) | |
684 | { | |
685 | int err, extra_size, user_length = 0, essid_compat = 0; | |
686 | char *extra; | |
687 | ||
688 | /* Calculate space needed by arguments. Always allocate | |
689 | * for max space. | |
690 | */ | |
691 | extra_size = descr->max_tokens * descr->token_size; | |
692 | ||
693 | /* Check need for ESSID compatibility for WE < 21 */ | |
694 | switch (cmd) { | |
84149b0f DM |
695 | case SIOCSIWESSID: |
696 | case SIOCGIWESSID: | |
697 | case SIOCSIWNICKN: | |
698 | case SIOCGIWNICKN: | |
699 | if (iwp->length == descr->max_tokens + 1) | |
700 | essid_compat = 1; | |
701 | else if (IW_IS_SET(cmd) && (iwp->length != 0)) { | |
702 | char essid[IW_ESSID_MAX_SIZE + 1]; | |
8503bd8c AV |
703 | unsigned int len; |
704 | len = iwp->length * descr->token_size; | |
84149b0f | 705 | |
8503bd8c AV |
706 | if (len > IW_ESSID_MAX_SIZE) |
707 | return -EFAULT; | |
708 | ||
709 | err = copy_from_user(essid, iwp->pointer, len); | |
84149b0f DM |
710 | if (err) |
711 | return -EFAULT; | |
712 | ||
713 | if (essid[iwp->length - 1] == '\0') | |
714 | essid_compat = 1; | |
715 | } | |
716 | break; | |
717 | default: | |
718 | break; | |
719 | } | |
720 | ||
721 | iwp->length -= essid_compat; | |
722 | ||
723 | /* Check what user space is giving us */ | |
724 | if (IW_IS_SET(cmd)) { | |
725 | /* Check NULL pointer */ | |
726 | if (!iwp->pointer && iwp->length != 0) | |
727 | return -EFAULT; | |
728 | /* Check if number of token fits within bounds */ | |
729 | if (iwp->length > descr->max_tokens) | |
730 | return -E2BIG; | |
731 | if (iwp->length < descr->min_tokens) | |
732 | return -EINVAL; | |
733 | } else { | |
734 | /* Check NULL pointer */ | |
735 | if (!iwp->pointer) | |
736 | return -EFAULT; | |
737 | /* Save user space buffer size for checking */ | |
738 | user_length = iwp->length; | |
739 | ||
740 | /* Don't check if user_length > max to allow forward | |
741 | * compatibility. The test user_length < min is | |
742 | * implied by the test at the end. | |
743 | */ | |
744 | ||
745 | /* Support for very large requests */ | |
746 | if ((descr->flags & IW_DESCR_FLAG_NOMAX) && | |
747 | (user_length > descr->max_tokens)) { | |
748 | /* Allow userspace to GET more than max so | |
749 | * we can support any size GET requests. | |
750 | * There is still a limit : -ENOMEM. | |
751 | */ | |
752 | extra_size = user_length * descr->token_size; | |
753 | ||
754 | /* Note : user_length is originally a __u16, | |
755 | * and token_size is controlled by us, | |
756 | * so extra_size won't get negative and | |
757 | * won't overflow... | |
758 | */ | |
759 | } | |
760 | } | |
761 | ||
762 | /* kzalloc() ensures NULL-termination for essid_compat. */ | |
763 | extra = kzalloc(extra_size, GFP_KERNEL); | |
764 | if (!extra) | |
765 | return -ENOMEM; | |
766 | ||
767 | /* If it is a SET, get all the extra data in here */ | |
768 | if (IW_IS_SET(cmd) && (iwp->length != 0)) { | |
769 | if (copy_from_user(extra, iwp->pointer, | |
770 | iwp->length * | |
771 | descr->token_size)) { | |
772 | err = -EFAULT; | |
773 | goto out; | |
774 | } | |
88f16db7 JB |
775 | |
776 | if (cmd == SIOCSIWENCODEEXT) { | |
777 | struct iw_encode_ext *ee = (void *) extra; | |
778 | ||
779 | if (iwp->length < sizeof(*ee) + ee->key_len) | |
780 | return -EFAULT; | |
781 | } | |
84149b0f DM |
782 | } |
783 | ||
784 | err = handler(dev, info, (union iwreq_data *) iwp, extra); | |
785 | ||
786 | iwp->length += essid_compat; | |
787 | ||
788 | /* If we have something to return to the user */ | |
789 | if (!err && IW_IS_GET(cmd)) { | |
790 | /* Check if there is enough buffer up there */ | |
791 | if (user_length < iwp->length) { | |
792 | err = -E2BIG; | |
793 | goto out; | |
794 | } | |
795 | ||
796 | if (copy_to_user(iwp->pointer, extra, | |
797 | iwp->length * | |
798 | descr->token_size)) { | |
799 | err = -EFAULT; | |
800 | goto out; | |
801 | } | |
802 | } | |
803 | ||
804 | /* Generate an event to notify listeners of the change */ | |
1014eb6e JT |
805 | if ((descr->flags & IW_DESCR_FLAG_EVENT) && |
806 | ((err == 0) || (err == -EIWCOMMIT))) { | |
84149b0f DM |
807 | union iwreq_data *data = (union iwreq_data *) iwp; |
808 | ||
809 | if (descr->flags & IW_DESCR_FLAG_RESTRICT) | |
810 | /* If the event is restricted, don't | |
811 | * export the payload. | |
812 | */ | |
813 | wireless_send_event(dev, cmd, data, NULL); | |
814 | else | |
815 | wireless_send_event(dev, cmd, data, extra); | |
816 | } | |
817 | ||
818 | out: | |
819 | kfree(extra); | |
820 | return err; | |
821 | } | |
822 | ||
1da177e4 | 823 | /* |
3d23e349 JB |
824 | * Call the commit handler in the driver |
825 | * (if exist and if conditions are right) | |
826 | * | |
827 | * Note : our current commit strategy is currently pretty dumb, | |
828 | * but we will be able to improve on that... | |
829 | * The goal is to try to agreagate as many changes as possible | |
830 | * before doing the commit. Drivers that will define a commit handler | |
831 | * are usually those that need a reset after changing parameters, so | |
832 | * we want to minimise the number of reset. | |
833 | * A cool idea is to use a timer : at each "set" command, we re-set the | |
834 | * timer, when the timer eventually fires, we call the driver. | |
835 | * Hopefully, more on that later. | |
836 | * | |
837 | * Also, I'm waiting to see how many people will complain about the | |
838 | * netif_running(dev) test. I'm open on that one... | |
839 | * Hopefully, the driver will remember to do a commit in "open()" ;-) | |
1da177e4 | 840 | */ |
3d23e349 | 841 | int call_commit_handler(struct net_device *dev) |
1da177e4 | 842 | { |
3d23e349 JB |
843 | #ifdef CONFIG_WIRELESS_EXT |
844 | if ((netif_running(dev)) && | |
845 | (dev->wireless_handlers->standard[0] != NULL)) | |
846 | /* Call the commit handler on the driver */ | |
847 | return dev->wireless_handlers->standard[0](dev, NULL, | |
848 | NULL, NULL); | |
849 | else | |
850 | return 0; /* Command completed successfully */ | |
851 | #else | |
852 | /* cfg80211 has no commit */ | |
853 | return 0; | |
854 | #endif | |
1da177e4 LT |
855 | } |
856 | ||
1da177e4 | 857 | /* |
295f4a1f | 858 | * Main IOCTl dispatcher. |
1da177e4 LT |
859 | * Check the type of IOCTL and call the appropriate wrapper... |
860 | */ | |
ca1e8bb8 DM |
861 | static int wireless_process_ioctl(struct net *net, struct ifreq *ifr, |
862 | unsigned int cmd, | |
0f5cabba | 863 | struct iw_request_info *info, |
ca1e8bb8 DM |
864 | wext_ioctl_func standard, |
865 | wext_ioctl_func private) | |
1da177e4 | 866 | { |
d2911255 | 867 | struct iwreq *iwr = (struct iwreq *) ifr; |
1da177e4 LT |
868 | struct net_device *dev; |
869 | iw_handler handler; | |
870 | ||
871 | /* Permissions are already checked in dev_ioctl() before calling us. | |
872 | * The copy_to/from_user() of ifr is also dealt with in there */ | |
873 | ||
874 | /* Make sure the device exist */ | |
881d966b | 875 | if ((dev = __dev_get_by_name(net, ifr->ifr_name)) == NULL) |
1da177e4 LT |
876 | return -ENODEV; |
877 | ||
878 | /* A bunch of special cases, then the generic case... | |
879 | * Note that 'cmd' is already filtered in dev_ioctl() with | |
880 | * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */ | |
dd8ceabc | 881 | if (cmd == SIOCGIWSTATS) |
0f5cabba | 882 | return standard(dev, iwr, cmd, info, |
ca1e8bb8 | 883 | &iw_handler_get_iwstats); |
e71a4783 | 884 | |
3d23e349 | 885 | #ifdef CONFIG_WEXT_PRIV |
dd8ceabc | 886 | if (cmd == SIOCGIWPRIV && dev->wireless_handlers) |
0f5cabba | 887 | return standard(dev, iwr, cmd, info, |
3d23e349 JB |
888 | iw_handler_get_private); |
889 | #endif | |
dd8ceabc JB |
890 | |
891 | /* Basic check */ | |
892 | if (!netif_device_present(dev)) | |
893 | return -ENODEV; | |
894 | ||
895 | /* New driver API : try to find the handler */ | |
896 | handler = get_handler(dev, cmd); | |
897 | if (handler) { | |
898 | /* Standard and private are not the same */ | |
899 | if (cmd < SIOCIWFIRSTPRIV) | |
0f5cabba | 900 | return standard(dev, iwr, cmd, info, handler); |
3d23e349 | 901 | else if (private) |
0f5cabba | 902 | return private(dev, iwr, cmd, info, handler); |
1da177e4 | 903 | } |
dd8ceabc | 904 | /* Old driver API : call driver ioctl handler */ |
148bc430 SH |
905 | if (dev->netdev_ops->ndo_do_ioctl) |
906 | return dev->netdev_ops->ndo_do_ioctl(dev, ifr, cmd); | |
dd8ceabc | 907 | return -EOPNOTSUPP; |
1da177e4 LT |
908 | } |
909 | ||
67dd7608 DM |
910 | /* If command is `set a parameter', or `get the encoding parameters', |
911 | * check if the user has the right to do it. | |
912 | */ | |
913 | static int wext_permission_check(unsigned int cmd) | |
914 | { | |
f64f9e71 JP |
915 | if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || |
916 | cmd == SIOCGIWENCODEEXT) && | |
917 | !capable(CAP_NET_ADMIN)) | |
67dd7608 DM |
918 | return -EPERM; |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
295f4a1f | 923 | /* entry point from dev ioctl */ |
a67fa76d | 924 | static int wext_ioctl_dispatch(struct net *net, struct ifreq *ifr, |
0f5cabba | 925 | unsigned int cmd, struct iw_request_info *info, |
a67fa76d DM |
926 | wext_ioctl_func standard, |
927 | wext_ioctl_func private) | |
295f4a1f | 928 | { |
67dd7608 | 929 | int ret = wext_permission_check(cmd); |
295f4a1f | 930 | |
67dd7608 DM |
931 | if (ret) |
932 | return ret; | |
dd8ceabc | 933 | |
881d966b | 934 | dev_load(net, ifr->ifr_name); |
295f4a1f | 935 | rtnl_lock(); |
0f5cabba | 936 | ret = wireless_process_ioctl(net, ifr, cmd, info, standard, private); |
295f4a1f | 937 | rtnl_unlock(); |
a67fa76d DM |
938 | |
939 | return ret; | |
940 | } | |
941 | ||
3d23e349 JB |
942 | /* |
943 | * Wrapper to call a standard Wireless Extension handler. | |
944 | * We do various checks and also take care of moving data between | |
945 | * user space and kernel space. | |
946 | */ | |
947 | static int ioctl_standard_call(struct net_device * dev, | |
948 | struct iwreq *iwr, | |
949 | unsigned int cmd, | |
950 | struct iw_request_info *info, | |
951 | iw_handler handler) | |
952 | { | |
953 | const struct iw_ioctl_description * descr; | |
954 | int ret = -EINVAL; | |
955 | ||
956 | /* Get the description of the IOCTL */ | |
957 | if ((cmd - SIOCIWFIRST) >= standard_ioctl_num) | |
958 | return -EOPNOTSUPP; | |
959 | descr = &(standard_ioctl[cmd - SIOCIWFIRST]); | |
960 | ||
961 | /* Check if we have a pointer to user space data or not */ | |
962 | if (descr->header_type != IW_HEADER_TYPE_POINT) { | |
963 | ||
964 | /* No extra arguments. Trivial to handle */ | |
965 | ret = handler(dev, info, &(iwr->u), NULL); | |
966 | ||
967 | /* Generate an event to notify listeners of the change */ | |
968 | if ((descr->flags & IW_DESCR_FLAG_EVENT) && | |
969 | ((ret == 0) || (ret == -EIWCOMMIT))) | |
970 | wireless_send_event(dev, cmd, &(iwr->u), NULL); | |
971 | } else { | |
972 | ret = ioctl_standard_iw_point(&iwr->u.data, cmd, descr, | |
973 | handler, dev, info); | |
974 | } | |
975 | ||
976 | /* Call commit handler if needed and defined */ | |
977 | if (ret == -EIWCOMMIT) | |
978 | ret = call_commit_handler(dev); | |
979 | ||
980 | /* Here, we will generate the appropriate event if needed */ | |
981 | ||
982 | return ret; | |
983 | } | |
984 | ||
985 | ||
a67fa76d DM |
986 | int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd, |
987 | void __user *arg) | |
988 | { | |
0f5cabba DM |
989 | struct iw_request_info info = { .cmd = cmd, .flags = 0 }; |
990 | int ret; | |
a67fa76d | 991 | |
0f5cabba DM |
992 | ret = wext_ioctl_dispatch(net, ifr, cmd, &info, |
993 | ioctl_standard_call, | |
994 | ioctl_private_call); | |
a67fa76d DM |
995 | if (ret >= 0 && |
996 | IW_IS_GET(cmd) && | |
997 | copy_to_user(arg, ifr, sizeof(struct iwreq))) | |
295f4a1f | 998 | return -EFAULT; |
a67fa76d | 999 | |
295f4a1f JB |
1000 | return ret; |
1001 | } | |
711e2c33 | 1002 | |
87de87d5 DM |
1003 | #ifdef CONFIG_COMPAT |
1004 | static int compat_standard_call(struct net_device *dev, | |
1005 | struct iwreq *iwr, | |
1006 | unsigned int cmd, | |
0f5cabba | 1007 | struct iw_request_info *info, |
87de87d5 DM |
1008 | iw_handler handler) |
1009 | { | |
1010 | const struct iw_ioctl_description *descr; | |
1011 | struct compat_iw_point *iwp_compat; | |
87de87d5 DM |
1012 | struct iw_point iwp; |
1013 | int err; | |
1014 | ||
1015 | descr = standard_ioctl + (cmd - SIOCIWFIRST); | |
1016 | ||
1017 | if (descr->header_type != IW_HEADER_TYPE_POINT) | |
0f5cabba | 1018 | return ioctl_standard_call(dev, iwr, cmd, info, handler); |
87de87d5 DM |
1019 | |
1020 | iwp_compat = (struct compat_iw_point *) &iwr->u.data; | |
1021 | iwp.pointer = compat_ptr(iwp_compat->pointer); | |
1022 | iwp.length = iwp_compat->length; | |
1023 | iwp.flags = iwp_compat->flags; | |
1024 | ||
0f5cabba | 1025 | err = ioctl_standard_iw_point(&iwp, cmd, descr, handler, dev, info); |
87de87d5 DM |
1026 | |
1027 | iwp_compat->pointer = ptr_to_compat(iwp.pointer); | |
1028 | iwp_compat->length = iwp.length; | |
1029 | iwp_compat->flags = iwp.flags; | |
1030 | ||
1031 | return err; | |
1032 | } | |
1033 | ||
87de87d5 DM |
1034 | int compat_wext_handle_ioctl(struct net *net, unsigned int cmd, |
1035 | unsigned long arg) | |
1036 | { | |
1037 | void __user *argp = (void __user *)arg; | |
0f5cabba | 1038 | struct iw_request_info info; |
87de87d5 DM |
1039 | struct iwreq iwr; |
1040 | char *colon; | |
1041 | int ret; | |
1042 | ||
1043 | if (copy_from_user(&iwr, argp, sizeof(struct iwreq))) | |
1044 | return -EFAULT; | |
1045 | ||
1046 | iwr.ifr_name[IFNAMSIZ-1] = 0; | |
1047 | colon = strchr(iwr.ifr_name, ':'); | |
1048 | if (colon) | |
1049 | *colon = 0; | |
1050 | ||
0f5cabba DM |
1051 | info.cmd = cmd; |
1052 | info.flags = IW_REQUEST_FLAG_COMPAT; | |
1053 | ||
1054 | ret = wext_ioctl_dispatch(net, (struct ifreq *) &iwr, cmd, &info, | |
87de87d5 DM |
1055 | compat_standard_call, |
1056 | compat_private_call); | |
1057 | ||
1058 | if (ret >= 0 && | |
1059 | IW_IS_GET(cmd) && | |
1060 | copy_to_user(argp, &iwr, sizeof(struct iwreq))) | |
1061 | return -EFAULT; | |
1062 | ||
1063 | return ret; | |
1064 | } | |
1065 | #endif |