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