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1da177e4 LT |
1 | /* |
2 | * This file implement the Wireless Extensions APIs. | |
3 | * | |
4 | * Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com> | |
c2805fbb | 5 | * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved. |
1da177e4 LT |
6 | * |
7 | * (As all part of the Linux kernel, this file is GPL) | |
8 | */ | |
9 | ||
10 | /************************** DOCUMENTATION **************************/ | |
11 | /* | |
12 | * API definition : | |
13 | * -------------- | |
14 | * See <linux/wireless.h> for details of the APIs and the rest. | |
15 | * | |
16 | * History : | |
17 | * ------- | |
18 | * | |
19 | * v1 - 5.12.01 - Jean II | |
20 | * o Created this file. | |
21 | * | |
22 | * v2 - 13.12.01 - Jean II | |
23 | * o Move /proc/net/wireless stuff from net/core/dev.c to here | |
24 | * o Make Wireless Extension IOCTLs go through here | |
25 | * o Added iw_handler handling ;-) | |
26 | * o Added standard ioctl description | |
27 | * o Initial dumb commit strategy based on orinoco.c | |
28 | * | |
29 | * v3 - 19.12.01 - Jean II | |
30 | * o Make sure we don't go out of standard_ioctl[] in ioctl_standard_call | |
31 | * o Add event dispatcher function | |
32 | * o Add event description | |
33 | * o Propagate events as rtnetlink IFLA_WIRELESS option | |
34 | * o Generate event on selected SET requests | |
35 | * | |
36 | * v4 - 18.04.02 - Jean II | |
37 | * o Fix stupid off by one in iw_ioctl_description : IW_ESSID_MAX_SIZE + 1 | |
38 | * | |
39 | * v5 - 21.06.02 - Jean II | |
40 | * o Add IW_PRIV_TYPE_ADDR in priv_type_size (+cleanup) | |
41 | * o Reshuffle IW_HEADER_TYPE_XXX to map IW_PRIV_TYPE_XXX changes | |
42 | * o Add IWEVCUSTOM for driver specific event/scanning token | |
43 | * o Turn on WE_STRICT_WRITE by default + kernel warning | |
44 | * o Fix WE_STRICT_WRITE in ioctl_export_private() (32 => iw_num) | |
45 | * o Fix off-by-one in test (extra_size <= IFNAMSIZ) | |
46 | * | |
47 | * v6 - 9.01.03 - Jean II | |
48 | * o Add common spy support : iw_handler_set_spy(), wireless_spy_update() | |
49 | * o Add enhanced spy support : iw_handler_set_thrspy() and event. | |
50 | * o Add WIRELESS_EXT version display in /proc/net/wireless | |
51 | * | |
52 | * v6 - 18.06.04 - Jean II | |
53 | * o Change get_spydata() method for added safety | |
54 | * o Remove spy #ifdef, they are always on -> cleaner code | |
55 | * o Allow any size GET request if user specifies length > max | |
56 | * and if request has IW_DESCR_FLAG_NOMAX flag or is SIOCGIWPRIV | |
57 | * o Start migrating get_wireless_stats to struct iw_handler_def | |
58 | * o Add wmb() in iw_handler_set_spy() for non-coherent archs/cpus | |
59 | * Based on patch from Pavel Roskin <proski@gnu.org> : | |
60 | * o Fix kernel data leak to user space in private handler handling | |
6582c164 JT |
61 | * |
62 | * v7 - 18.3.05 - Jean II | |
63 | * o Remove (struct iw_point *)->pointer from events and streams | |
64 | * o Remove spy_offset from struct iw_handler_def | |
65 | * o Start deprecating dev->get_wireless_stats, output a warning | |
66 | * o If IW_QUAL_DBM is set, show dBm values in /proc/net/wireless | |
67 | * o Don't loose INVALID/DBM flags when clearing UPDATED flags (iwstats) | |
711e2c33 JT |
68 | * |
69 | * v8 - 17.02.06 - Jean II | |
70 | * o RtNetlink requests support (SET/GET) | |
baef1865 JL |
71 | * |
72 | * v8b - 03.08.06 - Herbert Xu | |
73 | * o Fix Wireless Event locking issues. | |
74 | * | |
75 | * v9 - 14.3.06 - Jean II | |
76 | * o Change length in ESSID and NICK to strlen() instead of strlen()+1 | |
77 | * o Make standard_ioctl_num and standard_event_num unsigned | |
78 | * o Remove (struct net_device *)->get_wireless_stats() | |
c2805fbb JT |
79 | * |
80 | * v10 - 16.3.07 - Jean II | |
81 | * o Prevent leaking of kernel space in stream on 64 bits. | |
1da177e4 LT |
82 | */ |
83 | ||
84 | /***************************** INCLUDES *****************************/ | |
85 | ||
1da177e4 LT |
86 | #include <linux/module.h> |
87 | #include <linux/types.h> /* off_t */ | |
88 | #include <linux/netdevice.h> /* struct ifreq, dev_get_by_name() */ | |
89 | #include <linux/proc_fs.h> | |
90 | #include <linux/rtnetlink.h> /* rtnetlink stuff */ | |
91 | #include <linux/seq_file.h> | |
92 | #include <linux/init.h> /* for __init */ | |
93 | #include <linux/if_arp.h> /* ARPHRD_ETHER */ | |
9819d85c | 94 | #include <linux/etherdevice.h> /* compare_ether_addr */ |
782a6675 | 95 | #include <linux/interrupt.h> |
457c4cbc | 96 | #include <net/net_namespace.h> |
1da177e4 LT |
97 | |
98 | #include <linux/wireless.h> /* Pretty obvious */ | |
99 | #include <net/iw_handler.h> /* New driver API */ | |
bd5785ba | 100 | #include <net/netlink.h> |
295f4a1f | 101 | #include <net/wext.h> |
1da177e4 LT |
102 | |
103 | #include <asm/uaccess.h> /* copy_to_user() */ | |
104 | ||
1da177e4 LT |
105 | /************************* GLOBAL VARIABLES *************************/ |
106 | /* | |
107 | * You should not use global variables, because of re-entrancy. | |
108 | * On our case, it's only const, so it's OK... | |
109 | */ | |
110 | /* | |
111 | * Meta-data about all the standard Wireless Extension request we | |
112 | * know about. | |
113 | */ | |
114 | static const struct iw_ioctl_description standard_ioctl[] = { | |
115 | [SIOCSIWCOMMIT - SIOCIWFIRST] = { | |
116 | .header_type = IW_HEADER_TYPE_NULL, | |
117 | }, | |
118 | [SIOCGIWNAME - SIOCIWFIRST] = { | |
119 | .header_type = IW_HEADER_TYPE_CHAR, | |
120 | .flags = IW_DESCR_FLAG_DUMP, | |
121 | }, | |
122 | [SIOCSIWNWID - SIOCIWFIRST] = { | |
123 | .header_type = IW_HEADER_TYPE_PARAM, | |
124 | .flags = IW_DESCR_FLAG_EVENT, | |
125 | }, | |
126 | [SIOCGIWNWID - SIOCIWFIRST] = { | |
127 | .header_type = IW_HEADER_TYPE_PARAM, | |
128 | .flags = IW_DESCR_FLAG_DUMP, | |
129 | }, | |
130 | [SIOCSIWFREQ - SIOCIWFIRST] = { | |
131 | .header_type = IW_HEADER_TYPE_FREQ, | |
132 | .flags = IW_DESCR_FLAG_EVENT, | |
133 | }, | |
134 | [SIOCGIWFREQ - SIOCIWFIRST] = { | |
135 | .header_type = IW_HEADER_TYPE_FREQ, | |
136 | .flags = IW_DESCR_FLAG_DUMP, | |
137 | }, | |
138 | [SIOCSIWMODE - SIOCIWFIRST] = { | |
139 | .header_type = IW_HEADER_TYPE_UINT, | |
140 | .flags = IW_DESCR_FLAG_EVENT, | |
141 | }, | |
142 | [SIOCGIWMODE - SIOCIWFIRST] = { | |
143 | .header_type = IW_HEADER_TYPE_UINT, | |
144 | .flags = IW_DESCR_FLAG_DUMP, | |
145 | }, | |
146 | [SIOCSIWSENS - SIOCIWFIRST] = { | |
147 | .header_type = IW_HEADER_TYPE_PARAM, | |
148 | }, | |
149 | [SIOCGIWSENS - SIOCIWFIRST] = { | |
150 | .header_type = IW_HEADER_TYPE_PARAM, | |
151 | }, | |
152 | [SIOCSIWRANGE - SIOCIWFIRST] = { | |
153 | .header_type = IW_HEADER_TYPE_NULL, | |
154 | }, | |
155 | [SIOCGIWRANGE - SIOCIWFIRST] = { | |
156 | .header_type = IW_HEADER_TYPE_POINT, | |
157 | .token_size = 1, | |
158 | .max_tokens = sizeof(struct iw_range), | |
159 | .flags = IW_DESCR_FLAG_DUMP, | |
160 | }, | |
161 | [SIOCSIWPRIV - SIOCIWFIRST] = { | |
162 | .header_type = IW_HEADER_TYPE_NULL, | |
163 | }, | |
164 | [SIOCGIWPRIV - SIOCIWFIRST] = { /* (handled directly by us) */ | |
711e2c33 JT |
165 | .header_type = IW_HEADER_TYPE_POINT, |
166 | .token_size = sizeof(struct iw_priv_args), | |
167 | .max_tokens = 16, | |
168 | .flags = IW_DESCR_FLAG_NOMAX, | |
1da177e4 LT |
169 | }, |
170 | [SIOCSIWSTATS - SIOCIWFIRST] = { | |
171 | .header_type = IW_HEADER_TYPE_NULL, | |
172 | }, | |
173 | [SIOCGIWSTATS - SIOCIWFIRST] = { /* (handled directly by us) */ | |
711e2c33 JT |
174 | .header_type = IW_HEADER_TYPE_POINT, |
175 | .token_size = 1, | |
176 | .max_tokens = sizeof(struct iw_statistics), | |
1da177e4 LT |
177 | .flags = IW_DESCR_FLAG_DUMP, |
178 | }, | |
179 | [SIOCSIWSPY - SIOCIWFIRST] = { | |
180 | .header_type = IW_HEADER_TYPE_POINT, | |
181 | .token_size = sizeof(struct sockaddr), | |
182 | .max_tokens = IW_MAX_SPY, | |
183 | }, | |
184 | [SIOCGIWSPY - SIOCIWFIRST] = { | |
185 | .header_type = IW_HEADER_TYPE_POINT, | |
186 | .token_size = sizeof(struct sockaddr) + | |
187 | sizeof(struct iw_quality), | |
188 | .max_tokens = IW_MAX_SPY, | |
189 | }, | |
190 | [SIOCSIWTHRSPY - SIOCIWFIRST] = { | |
191 | .header_type = IW_HEADER_TYPE_POINT, | |
192 | .token_size = sizeof(struct iw_thrspy), | |
193 | .min_tokens = 1, | |
194 | .max_tokens = 1, | |
195 | }, | |
196 | [SIOCGIWTHRSPY - SIOCIWFIRST] = { | |
197 | .header_type = IW_HEADER_TYPE_POINT, | |
198 | .token_size = sizeof(struct iw_thrspy), | |
199 | .min_tokens = 1, | |
200 | .max_tokens = 1, | |
201 | }, | |
202 | [SIOCSIWAP - SIOCIWFIRST] = { | |
203 | .header_type = IW_HEADER_TYPE_ADDR, | |
204 | }, | |
205 | [SIOCGIWAP - SIOCIWFIRST] = { | |
206 | .header_type = IW_HEADER_TYPE_ADDR, | |
207 | .flags = IW_DESCR_FLAG_DUMP, | |
208 | }, | |
fff9cfd9 JT |
209 | [SIOCSIWMLME - SIOCIWFIRST] = { |
210 | .header_type = IW_HEADER_TYPE_POINT, | |
211 | .token_size = 1, | |
212 | .min_tokens = sizeof(struct iw_mlme), | |
213 | .max_tokens = sizeof(struct iw_mlme), | |
214 | }, | |
1da177e4 LT |
215 | [SIOCGIWAPLIST - SIOCIWFIRST] = { |
216 | .header_type = IW_HEADER_TYPE_POINT, | |
217 | .token_size = sizeof(struct sockaddr) + | |
218 | sizeof(struct iw_quality), | |
219 | .max_tokens = IW_MAX_AP, | |
220 | .flags = IW_DESCR_FLAG_NOMAX, | |
221 | }, | |
222 | [SIOCSIWSCAN - SIOCIWFIRST] = { | |
fff9cfd9 JT |
223 | .header_type = IW_HEADER_TYPE_POINT, |
224 | .token_size = 1, | |
225 | .min_tokens = 0, | |
226 | .max_tokens = sizeof(struct iw_scan_req), | |
1da177e4 LT |
227 | }, |
228 | [SIOCGIWSCAN - SIOCIWFIRST] = { | |
229 | .header_type = IW_HEADER_TYPE_POINT, | |
230 | .token_size = 1, | |
231 | .max_tokens = IW_SCAN_MAX_DATA, | |
232 | .flags = IW_DESCR_FLAG_NOMAX, | |
233 | }, | |
234 | [SIOCSIWESSID - SIOCIWFIRST] = { | |
235 | .header_type = IW_HEADER_TYPE_POINT, | |
236 | .token_size = 1, | |
baef1865 | 237 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
238 | .flags = IW_DESCR_FLAG_EVENT, |
239 | }, | |
240 | [SIOCGIWESSID - SIOCIWFIRST] = { | |
241 | .header_type = IW_HEADER_TYPE_POINT, | |
242 | .token_size = 1, | |
baef1865 | 243 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
244 | .flags = IW_DESCR_FLAG_DUMP, |
245 | }, | |
246 | [SIOCSIWNICKN - SIOCIWFIRST] = { | |
247 | .header_type = IW_HEADER_TYPE_POINT, | |
248 | .token_size = 1, | |
baef1865 | 249 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
250 | }, |
251 | [SIOCGIWNICKN - SIOCIWFIRST] = { | |
252 | .header_type = IW_HEADER_TYPE_POINT, | |
253 | .token_size = 1, | |
baef1865 | 254 | .max_tokens = IW_ESSID_MAX_SIZE, |
1da177e4 LT |
255 | }, |
256 | [SIOCSIWRATE - SIOCIWFIRST] = { | |
257 | .header_type = IW_HEADER_TYPE_PARAM, | |
258 | }, | |
259 | [SIOCGIWRATE - SIOCIWFIRST] = { | |
260 | .header_type = IW_HEADER_TYPE_PARAM, | |
261 | }, | |
262 | [SIOCSIWRTS - SIOCIWFIRST] = { | |
263 | .header_type = IW_HEADER_TYPE_PARAM, | |
264 | }, | |
265 | [SIOCGIWRTS - SIOCIWFIRST] = { | |
266 | .header_type = IW_HEADER_TYPE_PARAM, | |
267 | }, | |
268 | [SIOCSIWFRAG - SIOCIWFIRST] = { | |
269 | .header_type = IW_HEADER_TYPE_PARAM, | |
270 | }, | |
271 | [SIOCGIWFRAG - SIOCIWFIRST] = { | |
272 | .header_type = IW_HEADER_TYPE_PARAM, | |
273 | }, | |
274 | [SIOCSIWTXPOW - SIOCIWFIRST] = { | |
275 | .header_type = IW_HEADER_TYPE_PARAM, | |
276 | }, | |
277 | [SIOCGIWTXPOW - SIOCIWFIRST] = { | |
278 | .header_type = IW_HEADER_TYPE_PARAM, | |
279 | }, | |
280 | [SIOCSIWRETRY - SIOCIWFIRST] = { | |
281 | .header_type = IW_HEADER_TYPE_PARAM, | |
282 | }, | |
283 | [SIOCGIWRETRY - SIOCIWFIRST] = { | |
284 | .header_type = IW_HEADER_TYPE_PARAM, | |
285 | }, | |
286 | [SIOCSIWENCODE - SIOCIWFIRST] = { | |
287 | .header_type = IW_HEADER_TYPE_POINT, | |
288 | .token_size = 1, | |
289 | .max_tokens = IW_ENCODING_TOKEN_MAX, | |
290 | .flags = IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT, | |
291 | }, | |
292 | [SIOCGIWENCODE - SIOCIWFIRST] = { | |
293 | .header_type = IW_HEADER_TYPE_POINT, | |
294 | .token_size = 1, | |
295 | .max_tokens = IW_ENCODING_TOKEN_MAX, | |
296 | .flags = IW_DESCR_FLAG_DUMP | IW_DESCR_FLAG_RESTRICT, | |
297 | }, | |
298 | [SIOCSIWPOWER - SIOCIWFIRST] = { | |
299 | .header_type = IW_HEADER_TYPE_PARAM, | |
300 | }, | |
301 | [SIOCGIWPOWER - SIOCIWFIRST] = { | |
302 | .header_type = IW_HEADER_TYPE_PARAM, | |
303 | }, | |
fff9cfd9 JT |
304 | [SIOCSIWGENIE - SIOCIWFIRST] = { |
305 | .header_type = IW_HEADER_TYPE_POINT, | |
306 | .token_size = 1, | |
307 | .max_tokens = IW_GENERIC_IE_MAX, | |
308 | }, | |
309 | [SIOCGIWGENIE - SIOCIWFIRST] = { | |
310 | .header_type = IW_HEADER_TYPE_POINT, | |
311 | .token_size = 1, | |
312 | .max_tokens = IW_GENERIC_IE_MAX, | |
313 | }, | |
314 | [SIOCSIWAUTH - SIOCIWFIRST] = { | |
315 | .header_type = IW_HEADER_TYPE_PARAM, | |
316 | }, | |
317 | [SIOCGIWAUTH - SIOCIWFIRST] = { | |
318 | .header_type = IW_HEADER_TYPE_PARAM, | |
319 | }, | |
320 | [SIOCSIWENCODEEXT - SIOCIWFIRST] = { | |
321 | .header_type = IW_HEADER_TYPE_POINT, | |
322 | .token_size = 1, | |
323 | .min_tokens = sizeof(struct iw_encode_ext), | |
324 | .max_tokens = sizeof(struct iw_encode_ext) + | |
325 | IW_ENCODING_TOKEN_MAX, | |
326 | }, | |
327 | [SIOCGIWENCODEEXT - SIOCIWFIRST] = { | |
328 | .header_type = IW_HEADER_TYPE_POINT, | |
329 | .token_size = 1, | |
330 | .min_tokens = sizeof(struct iw_encode_ext), | |
331 | .max_tokens = sizeof(struct iw_encode_ext) + | |
332 | IW_ENCODING_TOKEN_MAX, | |
333 | }, | |
334 | [SIOCSIWPMKSA - SIOCIWFIRST] = { | |
335 | .header_type = IW_HEADER_TYPE_POINT, | |
336 | .token_size = 1, | |
337 | .min_tokens = sizeof(struct iw_pmksa), | |
338 | .max_tokens = sizeof(struct iw_pmksa), | |
339 | }, | |
1da177e4 | 340 | }; |
1ac58ee3 | 341 | static const unsigned standard_ioctl_num = ARRAY_SIZE(standard_ioctl); |
1da177e4 LT |
342 | |
343 | /* | |
344 | * Meta-data about all the additional standard Wireless Extension events | |
345 | * we know about. | |
346 | */ | |
347 | static const struct iw_ioctl_description standard_event[] = { | |
348 | [IWEVTXDROP - IWEVFIRST] = { | |
349 | .header_type = IW_HEADER_TYPE_ADDR, | |
350 | }, | |
351 | [IWEVQUAL - IWEVFIRST] = { | |
352 | .header_type = IW_HEADER_TYPE_QUAL, | |
353 | }, | |
354 | [IWEVCUSTOM - IWEVFIRST] = { | |
355 | .header_type = IW_HEADER_TYPE_POINT, | |
356 | .token_size = 1, | |
357 | .max_tokens = IW_CUSTOM_MAX, | |
358 | }, | |
359 | [IWEVREGISTERED - IWEVFIRST] = { | |
360 | .header_type = IW_HEADER_TYPE_ADDR, | |
361 | }, | |
362 | [IWEVEXPIRED - IWEVFIRST] = { | |
4ec93edb | 363 | .header_type = IW_HEADER_TYPE_ADDR, |
1da177e4 | 364 | }, |
fff9cfd9 JT |
365 | [IWEVGENIE - IWEVFIRST] = { |
366 | .header_type = IW_HEADER_TYPE_POINT, | |
367 | .token_size = 1, | |
368 | .max_tokens = IW_GENERIC_IE_MAX, | |
369 | }, | |
370 | [IWEVMICHAELMICFAILURE - IWEVFIRST] = { | |
4ec93edb | 371 | .header_type = IW_HEADER_TYPE_POINT, |
fff9cfd9 JT |
372 | .token_size = 1, |
373 | .max_tokens = sizeof(struct iw_michaelmicfailure), | |
374 | }, | |
375 | [IWEVASSOCREQIE - IWEVFIRST] = { | |
376 | .header_type = IW_HEADER_TYPE_POINT, | |
377 | .token_size = 1, | |
378 | .max_tokens = IW_GENERIC_IE_MAX, | |
379 | }, | |
380 | [IWEVASSOCRESPIE - IWEVFIRST] = { | |
381 | .header_type = IW_HEADER_TYPE_POINT, | |
382 | .token_size = 1, | |
383 | .max_tokens = IW_GENERIC_IE_MAX, | |
384 | }, | |
385 | [IWEVPMKIDCAND - IWEVFIRST] = { | |
386 | .header_type = IW_HEADER_TYPE_POINT, | |
387 | .token_size = 1, | |
388 | .max_tokens = sizeof(struct iw_pmkid_cand), | |
389 | }, | |
1da177e4 | 390 | }; |
1ac58ee3 | 391 | static const unsigned standard_event_num = ARRAY_SIZE(standard_event); |
1da177e4 LT |
392 | |
393 | /* Size (in bytes) of the various private data types */ | |
394 | static const char iw_priv_type_size[] = { | |
395 | 0, /* IW_PRIV_TYPE_NONE */ | |
396 | 1, /* IW_PRIV_TYPE_BYTE */ | |
397 | 1, /* IW_PRIV_TYPE_CHAR */ | |
398 | 0, /* Not defined */ | |
399 | sizeof(__u32), /* IW_PRIV_TYPE_INT */ | |
400 | sizeof(struct iw_freq), /* IW_PRIV_TYPE_FLOAT */ | |
401 | sizeof(struct sockaddr), /* IW_PRIV_TYPE_ADDR */ | |
402 | 0, /* Not defined */ | |
403 | }; | |
404 | ||
405 | /* Size (in bytes) of various events */ | |
406 | static const int event_type_size[] = { | |
407 | IW_EV_LCP_LEN, /* IW_HEADER_TYPE_NULL */ | |
408 | 0, | |
409 | IW_EV_CHAR_LEN, /* IW_HEADER_TYPE_CHAR */ | |
410 | 0, | |
411 | IW_EV_UINT_LEN, /* IW_HEADER_TYPE_UINT */ | |
412 | IW_EV_FREQ_LEN, /* IW_HEADER_TYPE_FREQ */ | |
413 | IW_EV_ADDR_LEN, /* IW_HEADER_TYPE_ADDR */ | |
414 | 0, | |
415 | IW_EV_POINT_LEN, /* Without variable payload */ | |
416 | IW_EV_PARAM_LEN, /* IW_HEADER_TYPE_PARAM */ | |
417 | IW_EV_QUAL_LEN, /* IW_HEADER_TYPE_QUAL */ | |
418 | }; | |
419 | ||
c2805fbb JT |
420 | /* Size (in bytes) of various events, as packed */ |
421 | static const int event_type_pk_size[] = { | |
422 | IW_EV_LCP_PK_LEN, /* IW_HEADER_TYPE_NULL */ | |
423 | 0, | |
424 | IW_EV_CHAR_PK_LEN, /* IW_HEADER_TYPE_CHAR */ | |
425 | 0, | |
426 | IW_EV_UINT_PK_LEN, /* IW_HEADER_TYPE_UINT */ | |
427 | IW_EV_FREQ_PK_LEN, /* IW_HEADER_TYPE_FREQ */ | |
428 | IW_EV_ADDR_PK_LEN, /* IW_HEADER_TYPE_ADDR */ | |
429 | 0, | |
430 | IW_EV_POINT_PK_LEN, /* Without variable payload */ | |
431 | IW_EV_PARAM_PK_LEN, /* IW_HEADER_TYPE_PARAM */ | |
432 | IW_EV_QUAL_PK_LEN, /* IW_HEADER_TYPE_QUAL */ | |
433 | }; | |
434 | ||
1da177e4 LT |
435 | /************************ COMMON SUBROUTINES ************************/ |
436 | /* | |
437 | * Stuff that may be used in various place or doesn't fit in one | |
438 | * of the section below. | |
439 | */ | |
440 | ||
441 | /* ---------------------------------------------------------------- */ | |
442 | /* | |
443 | * Return the driver handler associated with a specific Wireless Extension. | |
1da177e4 | 444 | */ |
bdf51894 | 445 | static iw_handler get_handler(struct net_device *dev, unsigned int cmd) |
1da177e4 LT |
446 | { |
447 | /* Don't "optimise" the following variable, it will crash */ | |
448 | unsigned int index; /* *MUST* be unsigned */ | |
449 | ||
450 | /* Check if we have some wireless handlers defined */ | |
e71a4783 | 451 | if (dev->wireless_handlers == NULL) |
1da177e4 LT |
452 | return NULL; |
453 | ||
454 | /* Try as a standard command */ | |
455 | index = cmd - SIOCIWFIRST; | |
e71a4783 | 456 | if (index < dev->wireless_handlers->num_standard) |
1da177e4 LT |
457 | return dev->wireless_handlers->standard[index]; |
458 | ||
459 | /* Try as a private command */ | |
460 | index = cmd - SIOCIWFIRSTPRIV; | |
e71a4783 | 461 | if (index < dev->wireless_handlers->num_private) |
1da177e4 LT |
462 | return dev->wireless_handlers->private[index]; |
463 | ||
464 | /* Not found */ | |
465 | return NULL; | |
466 | } | |
467 | ||
468 | /* ---------------------------------------------------------------- */ | |
469 | /* | |
470 | * Get statistics out of the driver | |
471 | */ | |
bdf51894 | 472 | static struct iw_statistics *get_wireless_stats(struct net_device *dev) |
1da177e4 LT |
473 | { |
474 | /* New location */ | |
e71a4783 | 475 | if ((dev->wireless_handlers != NULL) && |
1da177e4 LT |
476 | (dev->wireless_handlers->get_wireless_stats != NULL)) |
477 | return dev->wireless_handlers->get_wireless_stats(dev); | |
478 | ||
6582c164 | 479 | /* Not found */ |
4d44e0df | 480 | return NULL; |
1da177e4 LT |
481 | } |
482 | ||
483 | /* ---------------------------------------------------------------- */ | |
484 | /* | |
485 | * Call the commit handler in the driver | |
486 | * (if exist and if conditions are right) | |
487 | * | |
488 | * Note : our current commit strategy is currently pretty dumb, | |
489 | * but we will be able to improve on that... | |
490 | * The goal is to try to agreagate as many changes as possible | |
491 | * before doing the commit. Drivers that will define a commit handler | |
492 | * are usually those that need a reset after changing parameters, so | |
493 | * we want to minimise the number of reset. | |
494 | * A cool idea is to use a timer : at each "set" command, we re-set the | |
495 | * timer, when the timer eventually fires, we call the driver. | |
496 | * Hopefully, more on that later. | |
497 | * | |
498 | * Also, I'm waiting to see how many people will complain about the | |
499 | * netif_running(dev) test. I'm open on that one... | |
500 | * Hopefully, the driver will remember to do a commit in "open()" ;-) | |
501 | */ | |
bdf51894 | 502 | static int call_commit_handler(struct net_device *dev) |
1da177e4 | 503 | { |
e71a4783 | 504 | if ((netif_running(dev)) && |
4d44e0df | 505 | (dev->wireless_handlers->standard[0] != NULL)) |
1da177e4 LT |
506 | /* Call the commit handler on the driver */ |
507 | return dev->wireless_handlers->standard[0](dev, NULL, | |
508 | NULL, NULL); | |
4d44e0df | 509 | else |
1da177e4 LT |
510 | return 0; /* Command completed successfully */ |
511 | } | |
512 | ||
513 | /* ---------------------------------------------------------------- */ | |
514 | /* | |
515 | * Calculate size of private arguments | |
516 | */ | |
517 | static inline int get_priv_size(__u16 args) | |
518 | { | |
519 | int num = args & IW_PRIV_SIZE_MASK; | |
520 | int type = (args & IW_PRIV_TYPE_MASK) >> 12; | |
521 | ||
522 | return num * iw_priv_type_size[type]; | |
523 | } | |
524 | ||
525 | /* ---------------------------------------------------------------- */ | |
526 | /* | |
527 | * Re-calculate the size of private arguments | |
528 | */ | |
529 | static inline int adjust_priv_size(__u16 args, | |
530 | union iwreq_data * wrqu) | |
531 | { | |
532 | int num = wrqu->data.length; | |
533 | int max = args & IW_PRIV_SIZE_MASK; | |
534 | int type = (args & IW_PRIV_TYPE_MASK) >> 12; | |
535 | ||
536 | /* Make sure the driver doesn't goof up */ | |
537 | if (max < num) | |
538 | num = max; | |
539 | ||
540 | return num * iw_priv_type_size[type]; | |
541 | } | |
542 | ||
711e2c33 JT |
543 | /* ---------------------------------------------------------------- */ |
544 | /* | |
545 | * Standard Wireless Handler : get wireless stats | |
546 | * Allow programatic access to /proc/net/wireless even if /proc | |
547 | * doesn't exist... Also more efficient... | |
548 | */ | |
549 | static int iw_handler_get_iwstats(struct net_device * dev, | |
550 | struct iw_request_info * info, | |
551 | union iwreq_data * wrqu, | |
552 | char * extra) | |
553 | { | |
554 | /* Get stats from the driver */ | |
555 | struct iw_statistics *stats; | |
556 | ||
557 | stats = get_wireless_stats(dev); | |
4d44e0df | 558 | if (stats) { |
711e2c33 JT |
559 | /* Copy statistics to extra */ |
560 | memcpy(extra, stats, sizeof(struct iw_statistics)); | |
561 | wrqu->data.length = sizeof(struct iw_statistics); | |
562 | ||
563 | /* Check if we need to clear the updated flag */ | |
e71a4783 | 564 | if (wrqu->data.flags != 0) |
711e2c33 JT |
565 | stats->qual.updated &= ~IW_QUAL_ALL_UPDATED; |
566 | return 0; | |
567 | } else | |
568 | return -EOPNOTSUPP; | |
569 | } | |
570 | ||
571 | /* ---------------------------------------------------------------- */ | |
572 | /* | |
573 | * Standard Wireless Handler : get iwpriv definitions | |
574 | * Export the driver private handler definition | |
575 | * They will be picked up by tools like iwpriv... | |
576 | */ | |
577 | static int iw_handler_get_private(struct net_device * dev, | |
578 | struct iw_request_info * info, | |
579 | union iwreq_data * wrqu, | |
580 | char * extra) | |
581 | { | |
582 | /* Check if the driver has something to export */ | |
e71a4783 | 583 | if ((dev->wireless_handlers->num_private_args == 0) || |
711e2c33 JT |
584 | (dev->wireless_handlers->private_args == NULL)) |
585 | return -EOPNOTSUPP; | |
586 | ||
587 | /* Check if there is enough buffer up there */ | |
e71a4783 | 588 | if (wrqu->data.length < dev->wireless_handlers->num_private_args) { |
711e2c33 JT |
589 | /* User space can't know in advance how large the buffer |
590 | * needs to be. Give it a hint, so that we can support | |
591 | * any size buffer we want somewhat efficiently... */ | |
592 | wrqu->data.length = dev->wireless_handlers->num_private_args; | |
593 | return -E2BIG; | |
594 | } | |
595 | ||
596 | /* Set the number of available ioctls. */ | |
597 | wrqu->data.length = dev->wireless_handlers->num_private_args; | |
598 | ||
599 | /* Copy structure to the user buffer. */ | |
600 | memcpy(extra, dev->wireless_handlers->private_args, | |
601 | sizeof(struct iw_priv_args) * wrqu->data.length); | |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
1da177e4 LT |
606 | |
607 | /******************** /proc/net/wireless SUPPORT ********************/ | |
608 | /* | |
609 | * The /proc/net/wireless file is a human readable user-space interface | |
610 | * exporting various wireless specific statistics from the wireless devices. | |
611 | * This is the most popular part of the Wireless Extensions ;-) | |
612 | * | |
613 | * This interface is a pure clone of /proc/net/dev (in net/core/dev.c). | |
614 | * The content of the file is basically the content of "struct iw_statistics". | |
615 | */ | |
616 | ||
617 | #ifdef CONFIG_PROC_FS | |
618 | ||
619 | /* ---------------------------------------------------------------- */ | |
620 | /* | |
621 | * Print one entry (line) of /proc/net/wireless | |
622 | */ | |
bdf51894 JB |
623 | static void wireless_seq_printf_stats(struct seq_file *seq, |
624 | struct net_device *dev) | |
1da177e4 LT |
625 | { |
626 | /* Get stats from the driver */ | |
627 | struct iw_statistics *stats = get_wireless_stats(dev); | |
628 | ||
629 | if (stats) { | |
630 | seq_printf(seq, "%6s: %04x %3d%c %3d%c %3d%c %6d %6d %6d " | |
631 | "%6d %6d %6d\n", | |
632 | dev->name, stats->status, stats->qual.qual, | |
633 | stats->qual.updated & IW_QUAL_QUAL_UPDATED | |
634 | ? '.' : ' ', | |
4ec93edb | 635 | ((__s32) stats->qual.level) - |
6582c164 | 636 | ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0), |
1da177e4 LT |
637 | stats->qual.updated & IW_QUAL_LEVEL_UPDATED |
638 | ? '.' : ' ', | |
4ec93edb | 639 | ((__s32) stats->qual.noise) - |
6582c164 | 640 | ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0), |
1da177e4 LT |
641 | stats->qual.updated & IW_QUAL_NOISE_UPDATED |
642 | ? '.' : ' ', | |
643 | stats->discard.nwid, stats->discard.code, | |
644 | stats->discard.fragment, stats->discard.retries, | |
645 | stats->discard.misc, stats->miss.beacon); | |
6582c164 | 646 | stats->qual.updated &= ~IW_QUAL_ALL_UPDATED; |
1da177e4 LT |
647 | } |
648 | } | |
649 | ||
650 | /* ---------------------------------------------------------------- */ | |
651 | /* | |
652 | * Print info for /proc/net/wireless (print all entries) | |
653 | */ | |
654 | static int wireless_seq_show(struct seq_file *seq, void *v) | |
655 | { | |
656 | if (v == SEQ_START_TOKEN) | |
657 | seq_printf(seq, "Inter-| sta-| Quality | Discarded " | |
658 | "packets | Missed | WE\n" | |
659 | " face | tus | link level noise | nwid " | |
660 | "crypt frag retry misc | beacon | %d\n", | |
661 | WIRELESS_EXT); | |
662 | else | |
663 | wireless_seq_printf_stats(seq, v); | |
664 | return 0; | |
665 | } | |
666 | ||
f690808e | 667 | static const struct seq_operations wireless_seq_ops = { |
1da177e4 LT |
668 | .start = dev_seq_start, |
669 | .next = dev_seq_next, | |
670 | .stop = dev_seq_stop, | |
671 | .show = wireless_seq_show, | |
672 | }; | |
673 | ||
674 | static int wireless_seq_open(struct inode *inode, struct file *file) | |
675 | { | |
676 | return seq_open(file, &wireless_seq_ops); | |
677 | } | |
678 | ||
9a32144e | 679 | static const struct file_operations wireless_seq_fops = { |
1da177e4 LT |
680 | .owner = THIS_MODULE, |
681 | .open = wireless_seq_open, | |
682 | .read = seq_read, | |
683 | .llseek = seq_lseek, | |
684 | .release = seq_release, | |
685 | }; | |
686 | ||
295f4a1f | 687 | int __init wext_proc_init(void) |
1da177e4 | 688 | { |
6582c164 | 689 | /* Create /proc/net/wireless entry */ |
457c4cbc | 690 | if (!proc_net_fops_create(&init_net, "wireless", S_IRUGO, &wireless_seq_fops)) |
1da177e4 LT |
691 | return -ENOMEM; |
692 | ||
693 | return 0; | |
694 | } | |
695 | #endif /* CONFIG_PROC_FS */ | |
696 | ||
697 | /************************** IOCTL SUPPORT **************************/ | |
698 | /* | |
699 | * The original user space API to configure all those Wireless Extensions | |
700 | * is through IOCTLs. | |
701 | * In there, we check if we need to call the new driver API (iw_handler) | |
702 | * or just call the driver ioctl handler. | |
703 | */ | |
704 | ||
1da177e4 LT |
705 | /* ---------------------------------------------------------------- */ |
706 | /* | |
707 | * Wrapper to call a standard Wireless Extension handler. | |
708 | * We do various checks and also take care of moving data between | |
709 | * user space and kernel space. | |
710 | */ | |
711e2c33 JT |
711 | static int ioctl_standard_call(struct net_device * dev, |
712 | struct ifreq * ifr, | |
713 | unsigned int cmd, | |
714 | iw_handler handler) | |
1da177e4 LT |
715 | { |
716 | struct iwreq * iwr = (struct iwreq *) ifr; | |
717 | const struct iw_ioctl_description * descr; | |
718 | struct iw_request_info info; | |
719 | int ret = -EINVAL; | |
720 | ||
721 | /* Get the description of the IOCTL */ | |
e71a4783 | 722 | if ((cmd - SIOCIWFIRST) >= standard_ioctl_num) |
1da177e4 LT |
723 | return -EOPNOTSUPP; |
724 | descr = &(standard_ioctl[cmd - SIOCIWFIRST]); | |
725 | ||
1da177e4 LT |
726 | /* Prepare the call */ |
727 | info.cmd = cmd; | |
728 | info.flags = 0; | |
729 | ||
730 | /* Check if we have a pointer to user space data or not */ | |
e71a4783 | 731 | if (descr->header_type != IW_HEADER_TYPE_POINT) { |
1da177e4 LT |
732 | |
733 | /* No extra arguments. Trivial to handle */ | |
734 | ret = handler(dev, &info, &(iwr->u), NULL); | |
735 | ||
1da177e4 | 736 | /* Generate an event to notify listeners of the change */ |
e71a4783 | 737 | if ((descr->flags & IW_DESCR_FLAG_EVENT) && |
1da177e4 LT |
738 | ((ret == 0) || (ret == -EIWCOMMIT))) |
739 | wireless_send_event(dev, cmd, &(iwr->u), NULL); | |
1da177e4 LT |
740 | } else { |
741 | char * extra; | |
742 | int extra_size; | |
743 | int user_length = 0; | |
744 | int err; | |
98978edb | 745 | int essid_compat = 0; |
1da177e4 LT |
746 | |
747 | /* Calculate space needed by arguments. Always allocate | |
748 | * for max space. Easier, and won't last long... */ | |
749 | extra_size = descr->max_tokens * descr->token_size; | |
750 | ||
98978edb JL |
751 | /* Check need for ESSID compatibility for WE < 21 */ |
752 | switch (cmd) { | |
753 | case SIOCSIWESSID: | |
754 | case SIOCGIWESSID: | |
755 | case SIOCSIWNICKN: | |
756 | case SIOCGIWNICKN: | |
757 | if (iwr->u.data.length == descr->max_tokens + 1) | |
758 | essid_compat = 1; | |
759 | else if (IW_IS_SET(cmd) && (iwr->u.data.length != 0)) { | |
760 | char essid[IW_ESSID_MAX_SIZE + 1]; | |
761 | ||
762 | err = copy_from_user(essid, iwr->u.data.pointer, | |
763 | iwr->u.data.length * | |
764 | descr->token_size); | |
765 | if (err) | |
766 | return -EFAULT; | |
767 | ||
768 | if (essid[iwr->u.data.length - 1] == '\0') | |
769 | essid_compat = 1; | |
770 | } | |
771 | break; | |
772 | default: | |
773 | break; | |
774 | } | |
775 | ||
776 | iwr->u.data.length -= essid_compat; | |
777 | ||
1da177e4 | 778 | /* Check what user space is giving us */ |
e71a4783 | 779 | if (IW_IS_SET(cmd)) { |
1da177e4 | 780 | /* Check NULL pointer */ |
e71a4783 | 781 | if ((iwr->u.data.pointer == NULL) && |
1da177e4 LT |
782 | (iwr->u.data.length != 0)) |
783 | return -EFAULT; | |
784 | /* Check if number of token fits within bounds */ | |
e71a4783 | 785 | if (iwr->u.data.length > descr->max_tokens) |
1da177e4 | 786 | return -E2BIG; |
e71a4783 | 787 | if (iwr->u.data.length < descr->min_tokens) |
1da177e4 LT |
788 | return -EINVAL; |
789 | } else { | |
790 | /* Check NULL pointer */ | |
e71a4783 | 791 | if (iwr->u.data.pointer == NULL) |
1da177e4 LT |
792 | return -EFAULT; |
793 | /* Save user space buffer size for checking */ | |
794 | user_length = iwr->u.data.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 | /* Support for very large requests */ | |
e71a4783 | 801 | if ((descr->flags & IW_DESCR_FLAG_NOMAX) && |
1da177e4 LT |
802 | (user_length > descr->max_tokens)) { |
803 | /* Allow userspace to GET more than max so | |
804 | * we can support any size GET requests. | |
805 | * There is still a limit : -ENOMEM. */ | |
806 | extra_size = user_length * descr->token_size; | |
807 | /* Note : user_length is originally a __u16, | |
808 | * and token_size is controlled by us, | |
809 | * so extra_size won't get negative and | |
810 | * won't overflow... */ | |
811 | } | |
812 | } | |
813 | ||
1da177e4 | 814 | /* Create the kernel buffer */ |
98978edb JL |
815 | /* kzalloc ensures NULL-termination for essid_compat */ |
816 | extra = kzalloc(extra_size, GFP_KERNEL); | |
4d44e0df | 817 | if (extra == NULL) |
1da177e4 | 818 | return -ENOMEM; |
1da177e4 LT |
819 | |
820 | /* If it is a SET, get all the extra data in here */ | |
e71a4783 | 821 | if (IW_IS_SET(cmd) && (iwr->u.data.length != 0)) { |
1da177e4 LT |
822 | err = copy_from_user(extra, iwr->u.data.pointer, |
823 | iwr->u.data.length * | |
824 | descr->token_size); | |
825 | if (err) { | |
826 | kfree(extra); | |
827 | return -EFAULT; | |
828 | } | |
1da177e4 LT |
829 | } |
830 | ||
831 | /* Call the handler */ | |
832 | ret = handler(dev, &info, &(iwr->u), extra); | |
833 | ||
98978edb JL |
834 | iwr->u.data.length += essid_compat; |
835 | ||
1da177e4 LT |
836 | /* If we have something to return to the user */ |
837 | if (!ret && IW_IS_GET(cmd)) { | |
838 | /* Check if there is enough buffer up there */ | |
e71a4783 | 839 | if (user_length < iwr->u.data.length) { |
1da177e4 LT |
840 | kfree(extra); |
841 | return -E2BIG; | |
842 | } | |
843 | ||
844 | err = copy_to_user(iwr->u.data.pointer, extra, | |
845 | iwr->u.data.length * | |
846 | descr->token_size); | |
847 | if (err) | |
4ec93edb | 848 | ret = -EFAULT; |
1da177e4 LT |
849 | } |
850 | ||
1da177e4 | 851 | /* Generate an event to notify listeners of the change */ |
e71a4783 | 852 | if ((descr->flags & IW_DESCR_FLAG_EVENT) && |
1da177e4 | 853 | ((ret == 0) || (ret == -EIWCOMMIT))) { |
e71a4783 | 854 | if (descr->flags & IW_DESCR_FLAG_RESTRICT) |
1da177e4 LT |
855 | /* If the event is restricted, don't |
856 | * export the payload */ | |
857 | wireless_send_event(dev, cmd, &(iwr->u), NULL); | |
858 | else | |
859 | wireless_send_event(dev, cmd, &(iwr->u), | |
860 | extra); | |
861 | } | |
1da177e4 LT |
862 | |
863 | /* Cleanup - I told you it wasn't that long ;-) */ | |
864 | kfree(extra); | |
865 | } | |
866 | ||
867 | /* Call commit handler if needed and defined */ | |
e71a4783 | 868 | if (ret == -EIWCOMMIT) |
1da177e4 LT |
869 | ret = call_commit_handler(dev); |
870 | ||
871 | /* Here, we will generate the appropriate event if needed */ | |
872 | ||
873 | return ret; | |
874 | } | |
875 | ||
876 | /* ---------------------------------------------------------------- */ | |
877 | /* | |
878 | * Wrapper to call a private Wireless Extension handler. | |
879 | * We do various checks and also take care of moving data between | |
880 | * user space and kernel space. | |
881 | * It's not as nice and slimline as the standard wrapper. The cause | |
882 | * is struct iw_priv_args, which was not really designed for the | |
883 | * job we are going here. | |
884 | * | |
885 | * IMPORTANT : This function prevent to set and get data on the same | |
886 | * IOCTL and enforce the SET/GET convention. Not doing it would be | |
887 | * far too hairy... | |
888 | * If you need to set and get data at the same time, please don't use | |
889 | * a iw_handler but process it in your ioctl handler (i.e. use the | |
890 | * old driver API). | |
891 | */ | |
bdf51894 JB |
892 | static int ioctl_private_call(struct net_device *dev, struct ifreq *ifr, |
893 | unsigned int cmd, iw_handler handler) | |
1da177e4 LT |
894 | { |
895 | struct iwreq * iwr = (struct iwreq *) ifr; | |
896 | const struct iw_priv_args * descr = NULL; | |
897 | struct iw_request_info info; | |
898 | int extra_size = 0; | |
899 | int i; | |
900 | int ret = -EINVAL; | |
901 | ||
902 | /* Get the description of the IOCTL */ | |
e71a4783 SH |
903 | for (i = 0; i < dev->wireless_handlers->num_private_args; i++) |
904 | if (cmd == dev->wireless_handlers->private_args[i].cmd) { | |
1da177e4 LT |
905 | descr = &(dev->wireless_handlers->private_args[i]); |
906 | break; | |
907 | } | |
908 | ||
1da177e4 | 909 | /* Compute the size of the set/get arguments */ |
e71a4783 SH |
910 | if (descr != NULL) { |
911 | if (IW_IS_SET(cmd)) { | |
1da177e4 LT |
912 | int offset = 0; /* For sub-ioctls */ |
913 | /* Check for sub-ioctl handler */ | |
e71a4783 | 914 | if (descr->name[0] == '\0') |
1da177e4 LT |
915 | /* Reserve one int for sub-ioctl index */ |
916 | offset = sizeof(__u32); | |
917 | ||
918 | /* Size of set arguments */ | |
919 | extra_size = get_priv_size(descr->set_args); | |
920 | ||
921 | /* Does it fits in iwr ? */ | |
e71a4783 | 922 | if ((descr->set_args & IW_PRIV_SIZE_FIXED) && |
1da177e4 LT |
923 | ((extra_size + offset) <= IFNAMSIZ)) |
924 | extra_size = 0; | |
925 | } else { | |
926 | /* Size of get arguments */ | |
927 | extra_size = get_priv_size(descr->get_args); | |
928 | ||
929 | /* Does it fits in iwr ? */ | |
e71a4783 | 930 | if ((descr->get_args & IW_PRIV_SIZE_FIXED) && |
1da177e4 LT |
931 | (extra_size <= IFNAMSIZ)) |
932 | extra_size = 0; | |
933 | } | |
934 | } | |
935 | ||
936 | /* Prepare the call */ | |
937 | info.cmd = cmd; | |
938 | info.flags = 0; | |
939 | ||
940 | /* Check if we have a pointer to user space data or not. */ | |
e71a4783 | 941 | if (extra_size == 0) { |
1da177e4 LT |
942 | /* No extra arguments. Trivial to handle */ |
943 | ret = handler(dev, &info, &(iwr->u), (char *) &(iwr->u)); | |
944 | } else { | |
945 | char * extra; | |
946 | int err; | |
947 | ||
948 | /* Check what user space is giving us */ | |
e71a4783 | 949 | if (IW_IS_SET(cmd)) { |
1da177e4 | 950 | /* Check NULL pointer */ |
e71a4783 | 951 | if ((iwr->u.data.pointer == NULL) && |
1da177e4 LT |
952 | (iwr->u.data.length != 0)) |
953 | return -EFAULT; | |
954 | ||
955 | /* Does it fits within bounds ? */ | |
e71a4783 | 956 | if (iwr->u.data.length > (descr->set_args & |
1da177e4 LT |
957 | IW_PRIV_SIZE_MASK)) |
958 | return -E2BIG; | |
4d44e0df JB |
959 | } else if (iwr->u.data.pointer == NULL) |
960 | return -EFAULT; | |
1da177e4 | 961 | |
1da177e4 LT |
962 | /* Always allocate for max space. Easier, and won't last |
963 | * long... */ | |
964 | extra = kmalloc(extra_size, GFP_KERNEL); | |
4d44e0df | 965 | if (extra == NULL) |
1da177e4 | 966 | return -ENOMEM; |
1da177e4 LT |
967 | |
968 | /* If it is a SET, get all the extra data in here */ | |
e71a4783 | 969 | if (IW_IS_SET(cmd) && (iwr->u.data.length != 0)) { |
1da177e4 LT |
970 | err = copy_from_user(extra, iwr->u.data.pointer, |
971 | extra_size); | |
972 | if (err) { | |
973 | kfree(extra); | |
974 | return -EFAULT; | |
975 | } | |
1da177e4 LT |
976 | } |
977 | ||
978 | /* Call the handler */ | |
979 | ret = handler(dev, &info, &(iwr->u), extra); | |
980 | ||
981 | /* If we have something to return to the user */ | |
982 | if (!ret && IW_IS_GET(cmd)) { | |
983 | ||
984 | /* Adjust for the actual length if it's variable, | |
985 | * avoid leaking kernel bits outside. */ | |
986 | if (!(descr->get_args & IW_PRIV_SIZE_FIXED)) { | |
987 | extra_size = adjust_priv_size(descr->get_args, | |
988 | &(iwr->u)); | |
989 | } | |
990 | ||
991 | err = copy_to_user(iwr->u.data.pointer, extra, | |
992 | extra_size); | |
993 | if (err) | |
4ec93edb | 994 | ret = -EFAULT; |
1da177e4 LT |
995 | } |
996 | ||
997 | /* Cleanup - I told you it wasn't that long ;-) */ | |
998 | kfree(extra); | |
999 | } | |
1000 | ||
1001 | ||
1002 | /* Call commit handler if needed and defined */ | |
e71a4783 | 1003 | if (ret == -EIWCOMMIT) |
1da177e4 LT |
1004 | ret = call_commit_handler(dev); |
1005 | ||
1006 | return ret; | |
1007 | } | |
1008 | ||
1009 | /* ---------------------------------------------------------------- */ | |
1010 | /* | |
295f4a1f | 1011 | * Main IOCTl dispatcher. |
1da177e4 LT |
1012 | * Check the type of IOCTL and call the appropriate wrapper... |
1013 | */ | |
295f4a1f | 1014 | static int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd) |
1da177e4 LT |
1015 | { |
1016 | struct net_device *dev; | |
1017 | iw_handler handler; | |
1018 | ||
1019 | /* Permissions are already checked in dev_ioctl() before calling us. | |
1020 | * The copy_to/from_user() of ifr is also dealt with in there */ | |
1021 | ||
1022 | /* Make sure the device exist */ | |
1023 | if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) | |
1024 | return -ENODEV; | |
1025 | ||
1026 | /* A bunch of special cases, then the generic case... | |
1027 | * Note that 'cmd' is already filtered in dev_ioctl() with | |
1028 | * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */ | |
dd8ceabc JB |
1029 | if (cmd == SIOCGIWSTATS) |
1030 | return ioctl_standard_call(dev, ifr, cmd, | |
e71a4783 SH |
1031 | &iw_handler_get_iwstats); |
1032 | ||
dd8ceabc JB |
1033 | if (cmd == SIOCGIWPRIV && dev->wireless_handlers) |
1034 | return ioctl_standard_call(dev, ifr, cmd, | |
1035 | &iw_handler_get_private); | |
1036 | ||
1037 | /* Basic check */ | |
1038 | if (!netif_device_present(dev)) | |
1039 | return -ENODEV; | |
1040 | ||
1041 | /* New driver API : try to find the handler */ | |
1042 | handler = get_handler(dev, cmd); | |
1043 | if (handler) { | |
1044 | /* Standard and private are not the same */ | |
1045 | if (cmd < SIOCIWFIRSTPRIV) | |
1046 | return ioctl_standard_call(dev, ifr, cmd, handler); | |
1047 | else | |
1048 | return ioctl_private_call(dev, ifr, cmd, handler); | |
1da177e4 | 1049 | } |
dd8ceabc JB |
1050 | /* Old driver API : call driver ioctl handler */ |
1051 | if (dev->do_ioctl) | |
1052 | return dev->do_ioctl(dev, ifr, cmd); | |
1053 | return -EOPNOTSUPP; | |
1da177e4 LT |
1054 | } |
1055 | ||
295f4a1f JB |
1056 | /* entry point from dev ioctl */ |
1057 | int wext_handle_ioctl(struct ifreq *ifr, unsigned int cmd, | |
1058 | void __user *arg) | |
1059 | { | |
1060 | int ret; | |
1061 | ||
1062 | /* If command is `set a parameter', or | |
1063 | * `get the encoding parameters', check if | |
1064 | * the user has the right to do it */ | |
dd8ceabc JB |
1065 | if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT) |
1066 | && !capable(CAP_NET_ADMIN)) | |
1067 | return -EPERM; | |
1068 | ||
295f4a1f JB |
1069 | dev_load(ifr->ifr_name); |
1070 | rtnl_lock(); | |
1071 | ret = wireless_process_ioctl(ifr, cmd); | |
1072 | rtnl_unlock(); | |
1073 | if (IW_IS_GET(cmd) && copy_to_user(arg, ifr, sizeof(struct ifreq))) | |
1074 | return -EFAULT; | |
1075 | return ret; | |
1076 | } | |
711e2c33 | 1077 | |
1da177e4 LT |
1078 | /************************* EVENT PROCESSING *************************/ |
1079 | /* | |
1080 | * Process events generated by the wireless layer or the driver. | |
1081 | * Most often, the event will be propagated through rtnetlink | |
1082 | */ | |
1083 | ||
baef1865 JL |
1084 | /* ---------------------------------------------------------------- */ |
1085 | /* | |
1086 | * Locking... | |
1087 | * ---------- | |
1088 | * | |
1089 | * Thanks to Herbert Xu <herbert@gondor.apana.org.au> for fixing | |
1090 | * the locking issue in here and implementing this code ! | |
1091 | * | |
1092 | * The issue : wireless_send_event() is often called in interrupt context, | |
1093 | * while the Netlink layer can never be called in interrupt context. | |
1094 | * The fully formed RtNetlink events are queued, and then a tasklet is run | |
1095 | * to feed those to Netlink. | |
1096 | * The skb_queue is interrupt safe, and its lock is not held while calling | |
1097 | * Netlink, so there is no possibility of dealock. | |
1098 | * Jean II | |
1099 | */ | |
1100 | ||
782a6675 HX |
1101 | static struct sk_buff_head wireless_nlevent_queue; |
1102 | ||
baef1865 JL |
1103 | static int __init wireless_nlevent_init(void) |
1104 | { | |
1105 | skb_queue_head_init(&wireless_nlevent_queue); | |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | subsys_initcall(wireless_nlevent_init); | |
1110 | ||
782a6675 HX |
1111 | static void wireless_nlevent_process(unsigned long data) |
1112 | { | |
1113 | struct sk_buff *skb; | |
1114 | ||
1115 | while ((skb = skb_dequeue(&wireless_nlevent_queue))) | |
bd5785ba | 1116 | rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); |
782a6675 HX |
1117 | } |
1118 | ||
1119 | static DECLARE_TASKLET(wireless_nlevent_tasklet, wireless_nlevent_process, 0); | |
1120 | ||
1da177e4 LT |
1121 | /* ---------------------------------------------------------------- */ |
1122 | /* | |
1123 | * Fill a rtnetlink message with our event data. | |
1124 | * Note that we propage only the specified event and don't dump the | |
1125 | * current wireless config. Dumping the wireless config is far too | |
1126 | * expensive (for each parameter, the driver need to query the hardware). | |
1127 | */ | |
bdf51894 JB |
1128 | static int rtnetlink_fill_iwinfo(struct sk_buff *skb, struct net_device *dev, |
1129 | int type, char *event, int event_len) | |
1da177e4 LT |
1130 | { |
1131 | struct ifinfomsg *r; | |
1132 | struct nlmsghdr *nlh; | |
1da177e4 | 1133 | |
744b096e TG |
1134 | nlh = nlmsg_put(skb, 0, 0, type, sizeof(*r), 0); |
1135 | if (nlh == NULL) | |
1136 | return -EMSGSIZE; | |
1137 | ||
1138 | r = nlmsg_data(nlh); | |
1da177e4 | 1139 | r->ifi_family = AF_UNSPEC; |
9ef1d4c7 | 1140 | r->__ifi_pad = 0; |
1da177e4 LT |
1141 | r->ifi_type = dev->type; |
1142 | r->ifi_index = dev->ifindex; | |
711e2c33 | 1143 | r->ifi_flags = dev_get_flags(dev); |
1da177e4 LT |
1144 | r->ifi_change = 0; /* Wireless changes don't affect those flags */ |
1145 | ||
1146 | /* Add the wireless events in the netlink packet */ | |
744b096e | 1147 | NLA_PUT(skb, IFLA_WIRELESS, event_len, event); |
1da177e4 | 1148 | |
744b096e | 1149 | return nlmsg_end(skb, nlh); |
1da177e4 | 1150 | |
744b096e TG |
1151 | nla_put_failure: |
1152 | nlmsg_cancel(skb, nlh); | |
1153 | return -EMSGSIZE; | |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | /* ---------------------------------------------------------------- */ | |
1157 | /* | |
1158 | * Create and broadcast and send it on the standard rtnetlink socket | |
1159 | * This is a pure clone rtmsg_ifinfo() in net/core/rtnetlink.c | |
1160 | * Andrzej Krzysztofowicz mandated that I used a IFLA_XXX field | |
1161 | * within a RTM_NEWLINK event. | |
1162 | */ | |
bdf51894 | 1163 | static void rtmsg_iwinfo(struct net_device *dev, char *event, int event_len) |
1da177e4 LT |
1164 | { |
1165 | struct sk_buff *skb; | |
744b096e | 1166 | int err; |
1da177e4 | 1167 | |
744b096e | 1168 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
1169 | if (!skb) |
1170 | return; | |
1171 | ||
744b096e TG |
1172 | err = rtnetlink_fill_iwinfo(skb, dev, RTM_NEWLINK, event, event_len); |
1173 | if (err < 0) { | |
1174 | WARN_ON(err == -EMSGSIZE); | |
1da177e4 LT |
1175 | kfree_skb(skb); |
1176 | return; | |
1177 | } | |
744b096e | 1178 | |
ac6d439d | 1179 | NETLINK_CB(skb).dst_group = RTNLGRP_LINK; |
782a6675 HX |
1180 | skb_queue_tail(&wireless_nlevent_queue, skb); |
1181 | tasklet_schedule(&wireless_nlevent_tasklet); | |
1182 | } | |
1183 | ||
1da177e4 LT |
1184 | /* ---------------------------------------------------------------- */ |
1185 | /* | |
1186 | * Main event dispatcher. Called from other parts and drivers. | |
1187 | * Send the event on the appropriate channels. | |
1188 | * May be called from interrupt context. | |
1189 | */ | |
1190 | void wireless_send_event(struct net_device * dev, | |
1191 | unsigned int cmd, | |
1192 | union iwreq_data * wrqu, | |
1193 | char * extra) | |
1194 | { | |
1195 | const struct iw_ioctl_description * descr = NULL; | |
1196 | int extra_len = 0; | |
1197 | struct iw_event *event; /* Mallocated whole event */ | |
1198 | int event_len; /* Its size */ | |
1199 | int hdr_len; /* Size of the event header */ | |
6582c164 | 1200 | int wrqu_off = 0; /* Offset in wrqu */ |
1da177e4 LT |
1201 | /* Don't "optimise" the following variable, it will crash */ |
1202 | unsigned cmd_index; /* *MUST* be unsigned */ | |
1203 | ||
6582c164 | 1204 | /* Get the description of the Event */ |
e71a4783 | 1205 | if (cmd <= SIOCIWLAST) { |
1da177e4 | 1206 | cmd_index = cmd - SIOCIWFIRST; |
e71a4783 | 1207 | if (cmd_index < standard_ioctl_num) |
1da177e4 LT |
1208 | descr = &(standard_ioctl[cmd_index]); |
1209 | } else { | |
1210 | cmd_index = cmd - IWEVFIRST; | |
e71a4783 | 1211 | if (cmd_index < standard_event_num) |
1da177e4 LT |
1212 | descr = &(standard_event[cmd_index]); |
1213 | } | |
1214 | /* Don't accept unknown events */ | |
e71a4783 | 1215 | if (descr == NULL) { |
1da177e4 LT |
1216 | /* Note : we don't return an error to the driver, because |
1217 | * the driver would not know what to do about it. It can't | |
1218 | * return an error to the user, because the event is not | |
1219 | * initiated by a user request. | |
1220 | * The best the driver could do is to log an error message. | |
1221 | * We will do it ourselves instead... | |
1222 | */ | |
4ec93edb | 1223 | printk(KERN_ERR "%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n", |
1da177e4 LT |
1224 | dev->name, cmd); |
1225 | return; | |
1226 | } | |
1da177e4 LT |
1227 | |
1228 | /* Check extra parameters and set extra_len */ | |
e71a4783 | 1229 | if (descr->header_type == IW_HEADER_TYPE_POINT) { |
1da177e4 | 1230 | /* Check if number of token fits within bounds */ |
e71a4783 | 1231 | if (wrqu->data.length > descr->max_tokens) { |
4ec93edb | 1232 | printk(KERN_ERR "%s (WE) : Wireless Event too big (%d)\n", dev->name, wrqu->data.length); |
1da177e4 LT |
1233 | return; |
1234 | } | |
e71a4783 | 1235 | if (wrqu->data.length < descr->min_tokens) { |
4ec93edb | 1236 | printk(KERN_ERR "%s (WE) : Wireless Event too small (%d)\n", dev->name, wrqu->data.length); |
1da177e4 LT |
1237 | return; |
1238 | } | |
1239 | /* Calculate extra_len - extra is NULL for restricted events */ | |
e71a4783 | 1240 | if (extra != NULL) |
1da177e4 | 1241 | extra_len = wrqu->data.length * descr->token_size; |
6582c164 JT |
1242 | /* Always at an offset in wrqu */ |
1243 | wrqu_off = IW_EV_POINT_OFF; | |
1da177e4 LT |
1244 | } |
1245 | ||
1246 | /* Total length of the event */ | |
1247 | hdr_len = event_type_size[descr->header_type]; | |
1248 | event_len = hdr_len + extra_len; | |
1249 | ||
1da177e4 LT |
1250 | /* Create temporary buffer to hold the event */ |
1251 | event = kmalloc(event_len, GFP_ATOMIC); | |
e71a4783 | 1252 | if (event == NULL) |
1da177e4 LT |
1253 | return; |
1254 | ||
1255 | /* Fill event */ | |
1256 | event->len = event_len; | |
1257 | event->cmd = cmd; | |
6582c164 | 1258 | memcpy(&event->u, ((char *) wrqu) + wrqu_off, hdr_len - IW_EV_LCP_LEN); |
4d44e0df | 1259 | if (extra) |
1da177e4 LT |
1260 | memcpy(((char *) event) + hdr_len, extra, extra_len); |
1261 | ||
711e2c33 | 1262 | /* Send via the RtNetlink event channel */ |
1da177e4 | 1263 | rtmsg_iwinfo(dev, (char *) event, event_len); |
1da177e4 LT |
1264 | |
1265 | /* Cleanup */ | |
1266 | kfree(event); | |
1267 | ||
1268 | return; /* Always success, I guess ;-) */ | |
1269 | } | |
7a9df167 | 1270 | EXPORT_SYMBOL(wireless_send_event); |
1da177e4 LT |
1271 | |
1272 | /********************** ENHANCED IWSPY SUPPORT **********************/ | |
1273 | /* | |
1274 | * In the old days, the driver was handling spy support all by itself. | |
1275 | * Now, the driver can delegate this task to Wireless Extensions. | |
1276 | * It needs to use those standard spy iw_handler in struct iw_handler_def, | |
1277 | * push data to us via wireless_spy_update() and include struct iw_spy_data | |
6582c164 | 1278 | * in its private part (and export it in net_device->wireless_data->spy_data). |
1da177e4 LT |
1279 | * One of the main advantage of centralising spy support here is that |
1280 | * it becomes much easier to improve and extend it without having to touch | |
1281 | * the drivers. One example is the addition of the Spy-Threshold events. | |
1282 | */ | |
1283 | ||
1284 | /* ---------------------------------------------------------------- */ | |
1285 | /* | |
1286 | * Return the pointer to the spy data in the driver. | |
1287 | * Because this is called on the Rx path via wireless_spy_update(), | |
1288 | * we want it to be efficient... | |
1289 | */ | |
4d44e0df | 1290 | static inline struct iw_spy_data *get_spydata(struct net_device *dev) |
1da177e4 LT |
1291 | { |
1292 | /* This is the new way */ | |
e71a4783 | 1293 | if (dev->wireless_data) |
4d44e0df | 1294 | return dev->wireless_data->spy_data; |
6582c164 | 1295 | return NULL; |
1da177e4 LT |
1296 | } |
1297 | ||
1298 | /*------------------------------------------------------------------*/ | |
1299 | /* | |
1300 | * Standard Wireless Handler : set Spy List | |
1301 | */ | |
1302 | int iw_handler_set_spy(struct net_device * dev, | |
1303 | struct iw_request_info * info, | |
1304 | union iwreq_data * wrqu, | |
1305 | char * extra) | |
1306 | { | |
1307 | struct iw_spy_data * spydata = get_spydata(dev); | |
1308 | struct sockaddr * address = (struct sockaddr *) extra; | |
1309 | ||
1da177e4 | 1310 | /* Make sure driver is not buggy or using the old API */ |
e71a4783 | 1311 | if (!spydata) |
1da177e4 LT |
1312 | return -EOPNOTSUPP; |
1313 | ||
1314 | /* Disable spy collection while we copy the addresses. | |
1315 | * While we copy addresses, any call to wireless_spy_update() | |
1316 | * will NOP. This is OK, as anyway the addresses are changing. */ | |
1317 | spydata->spy_number = 0; | |
1318 | ||
1319 | /* We want to operate without locking, because wireless_spy_update() | |
1320 | * most likely will happen in the interrupt handler, and therefore | |
1321 | * have its own locking constraints and needs performance. | |
1322 | * The rtnl_lock() make sure we don't race with the other iw_handlers. | |
1323 | * This make sure wireless_spy_update() "see" that the spy list | |
1324 | * is temporarily disabled. */ | |
e16aa207 | 1325 | smp_wmb(); |
1da177e4 LT |
1326 | |
1327 | /* Are there are addresses to copy? */ | |
e71a4783 | 1328 | if (wrqu->data.length > 0) { |
1da177e4 LT |
1329 | int i; |
1330 | ||
1331 | /* Copy addresses */ | |
e71a4783 | 1332 | for (i = 0; i < wrqu->data.length; i++) |
1da177e4 LT |
1333 | memcpy(spydata->spy_address[i], address[i].sa_data, |
1334 | ETH_ALEN); | |
1335 | /* Reset stats */ | |
1336 | memset(spydata->spy_stat, 0, | |
1337 | sizeof(struct iw_quality) * IW_MAX_SPY); | |
1da177e4 LT |
1338 | } |
1339 | ||
1340 | /* Make sure above is updated before re-enabling */ | |
e16aa207 | 1341 | smp_wmb(); |
1da177e4 LT |
1342 | |
1343 | /* Enable addresses */ | |
1344 | spydata->spy_number = wrqu->data.length; | |
1345 | ||
1346 | return 0; | |
1347 | } | |
7a9df167 | 1348 | EXPORT_SYMBOL(iw_handler_set_spy); |
1da177e4 LT |
1349 | |
1350 | /*------------------------------------------------------------------*/ | |
1351 | /* | |
1352 | * Standard Wireless Handler : get Spy List | |
1353 | */ | |
1354 | int iw_handler_get_spy(struct net_device * dev, | |
1355 | struct iw_request_info * info, | |
1356 | union iwreq_data * wrqu, | |
1357 | char * extra) | |
1358 | { | |
1359 | struct iw_spy_data * spydata = get_spydata(dev); | |
1360 | struct sockaddr * address = (struct sockaddr *) extra; | |
1361 | int i; | |
1362 | ||
1363 | /* Make sure driver is not buggy or using the old API */ | |
e71a4783 | 1364 | if (!spydata) |
1da177e4 LT |
1365 | return -EOPNOTSUPP; |
1366 | ||
1367 | wrqu->data.length = spydata->spy_number; | |
1368 | ||
1369 | /* Copy addresses. */ | |
e71a4783 | 1370 | for (i = 0; i < spydata->spy_number; i++) { |
1da177e4 LT |
1371 | memcpy(address[i].sa_data, spydata->spy_address[i], ETH_ALEN); |
1372 | address[i].sa_family = AF_UNIX; | |
1373 | } | |
1374 | /* Copy stats to the user buffer (just after). */ | |
e71a4783 | 1375 | if (spydata->spy_number > 0) |
1da177e4 LT |
1376 | memcpy(extra + (sizeof(struct sockaddr) *spydata->spy_number), |
1377 | spydata->spy_stat, | |
1378 | sizeof(struct iw_quality) * spydata->spy_number); | |
1379 | /* Reset updated flags. */ | |
e71a4783 | 1380 | for (i = 0; i < spydata->spy_number; i++) |
6582c164 | 1381 | spydata->spy_stat[i].updated &= ~IW_QUAL_ALL_UPDATED; |
1da177e4 LT |
1382 | return 0; |
1383 | } | |
7a9df167 | 1384 | EXPORT_SYMBOL(iw_handler_get_spy); |
1da177e4 LT |
1385 | |
1386 | /*------------------------------------------------------------------*/ | |
1387 | /* | |
1388 | * Standard Wireless Handler : set spy threshold | |
1389 | */ | |
1390 | int iw_handler_set_thrspy(struct net_device * dev, | |
1391 | struct iw_request_info *info, | |
1392 | union iwreq_data * wrqu, | |
1393 | char * extra) | |
1394 | { | |
1395 | struct iw_spy_data * spydata = get_spydata(dev); | |
1396 | struct iw_thrspy * threshold = (struct iw_thrspy *) extra; | |
1397 | ||
1398 | /* Make sure driver is not buggy or using the old API */ | |
e71a4783 | 1399 | if (!spydata) |
1da177e4 LT |
1400 | return -EOPNOTSUPP; |
1401 | ||
1402 | /* Just do it */ | |
1403 | memcpy(&(spydata->spy_thr_low), &(threshold->low), | |
1404 | 2 * sizeof(struct iw_quality)); | |
1405 | ||
1406 | /* Clear flag */ | |
1407 | memset(spydata->spy_thr_under, '\0', sizeof(spydata->spy_thr_under)); | |
1408 | ||
1da177e4 LT |
1409 | return 0; |
1410 | } | |
7a9df167 | 1411 | EXPORT_SYMBOL(iw_handler_set_thrspy); |
1da177e4 LT |
1412 | |
1413 | /*------------------------------------------------------------------*/ | |
1414 | /* | |
1415 | * Standard Wireless Handler : get spy threshold | |
1416 | */ | |
1417 | int iw_handler_get_thrspy(struct net_device * dev, | |
1418 | struct iw_request_info *info, | |
1419 | union iwreq_data * wrqu, | |
1420 | char * extra) | |
1421 | { | |
1422 | struct iw_spy_data * spydata = get_spydata(dev); | |
1423 | struct iw_thrspy * threshold = (struct iw_thrspy *) extra; | |
1424 | ||
1425 | /* Make sure driver is not buggy or using the old API */ | |
e71a4783 | 1426 | if (!spydata) |
1da177e4 LT |
1427 | return -EOPNOTSUPP; |
1428 | ||
1429 | /* Just do it */ | |
1430 | memcpy(&(threshold->low), &(spydata->spy_thr_low), | |
1431 | 2 * sizeof(struct iw_quality)); | |
1432 | ||
1433 | return 0; | |
1434 | } | |
7a9df167 | 1435 | EXPORT_SYMBOL(iw_handler_get_thrspy); |
1da177e4 LT |
1436 | |
1437 | /*------------------------------------------------------------------*/ | |
1438 | /* | |
1439 | * Prepare and send a Spy Threshold event | |
1440 | */ | |
1441 | static void iw_send_thrspy_event(struct net_device * dev, | |
1442 | struct iw_spy_data * spydata, | |
1443 | unsigned char * address, | |
1444 | struct iw_quality * wstats) | |
1445 | { | |
1446 | union iwreq_data wrqu; | |
1447 | struct iw_thrspy threshold; | |
1448 | ||
1449 | /* Init */ | |
1450 | wrqu.data.length = 1; | |
1451 | wrqu.data.flags = 0; | |
1452 | /* Copy address */ | |
1453 | memcpy(threshold.addr.sa_data, address, ETH_ALEN); | |
1454 | threshold.addr.sa_family = ARPHRD_ETHER; | |
1455 | /* Copy stats */ | |
1456 | memcpy(&(threshold.qual), wstats, sizeof(struct iw_quality)); | |
1457 | /* Copy also thresholds */ | |
1458 | memcpy(&(threshold.low), &(spydata->spy_thr_low), | |
1459 | 2 * sizeof(struct iw_quality)); | |
1460 | ||
1da177e4 LT |
1461 | /* Send event to user space */ |
1462 | wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold); | |
1463 | } | |
1464 | ||
1465 | /* ---------------------------------------------------------------- */ | |
1466 | /* | |
1467 | * Call for the driver to update the spy data. | |
1468 | * For now, the spy data is a simple array. As the size of the array is | |
1469 | * small, this is good enough. If we wanted to support larger number of | |
1470 | * spy addresses, we should use something more efficient... | |
1471 | */ | |
1472 | void wireless_spy_update(struct net_device * dev, | |
1473 | unsigned char * address, | |
1474 | struct iw_quality * wstats) | |
1475 | { | |
1476 | struct iw_spy_data * spydata = get_spydata(dev); | |
1477 | int i; | |
1478 | int match = -1; | |
1479 | ||
1480 | /* Make sure driver is not buggy or using the old API */ | |
e71a4783 | 1481 | if (!spydata) |
1da177e4 LT |
1482 | return; |
1483 | ||
1da177e4 | 1484 | /* Update all records that match */ |
e71a4783 SH |
1485 | for (i = 0; i < spydata->spy_number; i++) |
1486 | if (!compare_ether_addr(address, spydata->spy_address[i])) { | |
1da177e4 LT |
1487 | memcpy(&(spydata->spy_stat[i]), wstats, |
1488 | sizeof(struct iw_quality)); | |
1489 | match = i; | |
1490 | } | |
1491 | ||
1492 | /* Generate an event if we cross the spy threshold. | |
1493 | * To avoid event storms, we have a simple hysteresis : we generate | |
1494 | * event only when we go under the low threshold or above the | |
1495 | * high threshold. */ | |
e71a4783 SH |
1496 | if (match >= 0) { |
1497 | if (spydata->spy_thr_under[match]) { | |
1498 | if (wstats->level > spydata->spy_thr_high.level) { | |
1da177e4 LT |
1499 | spydata->spy_thr_under[match] = 0; |
1500 | iw_send_thrspy_event(dev, spydata, | |
1501 | address, wstats); | |
1502 | } | |
1503 | } else { | |
e71a4783 | 1504 | if (wstats->level < spydata->spy_thr_low.level) { |
1da177e4 LT |
1505 | spydata->spy_thr_under[match] = 1; |
1506 | iw_send_thrspy_event(dev, spydata, | |
1507 | address, wstats); | |
1508 | } | |
1509 | } | |
1510 | } | |
1511 | } | |
1da177e4 | 1512 | EXPORT_SYMBOL(wireless_spy_update); |