blob: ffff0da46c6ee2a3703a9f3116eab0162b4727e6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This file implement the Wireless Extensions APIs.
3 *
4 * Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08005 * Copyright (c) 1997-2006 Jean Tourrilhes, All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
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
Jean Tourrilhes6582c162005-09-02 11:32:28 -070061 *
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)
Jean Tourrilhes711e2c32006-02-22 15:10:56 -080068 *
69 * v8 - 17.02.06 - Jean II
70 * o RtNetlink requests support (SET/GET)
John W. Linvillebaef1862006-09-08 16:04:05 -040071 *
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()
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 */
80
81/***************************** INCLUDES *****************************/
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#include <linux/module.h>
84#include <linux/types.h> /* off_t */
85#include <linux/netdevice.h> /* struct ifreq, dev_get_by_name() */
86#include <linux/proc_fs.h>
87#include <linux/rtnetlink.h> /* rtnetlink stuff */
88#include <linux/seq_file.h>
89#include <linux/init.h> /* for __init */
90#include <linux/if_arp.h> /* ARPHRD_ETHER */
Linus Torvalds9819d852006-01-10 19:35:19 -080091#include <linux/etherdevice.h> /* compare_ether_addr */
Herbert Xu782a6672006-08-03 23:54:41 +100092#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
94#include <linux/wireless.h> /* Pretty obvious */
95#include <net/iw_handler.h> /* New driver API */
Thomas Grafbd5785b2006-08-15 00:36:49 -070096#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
98#include <asm/uaccess.h> /* copy_to_user() */
99
100/**************************** CONSTANTS ****************************/
101
102/* Debugging stuff */
103#undef WE_IOCTL_DEBUG /* Debug IOCTL API */
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800104#undef WE_RTNETLINK_DEBUG /* Debug RtNetlink API */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105#undef WE_EVENT_DEBUG /* Debug Event dispatcher */
106#undef WE_SPY_DEBUG /* Debug enhanced spy support */
107
108/* Options */
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800109//CONFIG_NET_WIRELESS_RTNETLINK /* Wireless requests over RtNetlink */
110#define WE_EVENT_RTNETLINK /* Propagate events using RtNetlink */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111#define WE_SET_EVENT /* Generate an event on some set commands */
112
113/************************* GLOBAL VARIABLES *************************/
114/*
115 * You should not use global variables, because of re-entrancy.
116 * On our case, it's only const, so it's OK...
117 */
118/*
119 * Meta-data about all the standard Wireless Extension request we
120 * know about.
121 */
122static const struct iw_ioctl_description standard_ioctl[] = {
123 [SIOCSIWCOMMIT - SIOCIWFIRST] = {
124 .header_type = IW_HEADER_TYPE_NULL,
125 },
126 [SIOCGIWNAME - SIOCIWFIRST] = {
127 .header_type = IW_HEADER_TYPE_CHAR,
128 .flags = IW_DESCR_FLAG_DUMP,
129 },
130 [SIOCSIWNWID - SIOCIWFIRST] = {
131 .header_type = IW_HEADER_TYPE_PARAM,
132 .flags = IW_DESCR_FLAG_EVENT,
133 },
134 [SIOCGIWNWID - SIOCIWFIRST] = {
135 .header_type = IW_HEADER_TYPE_PARAM,
136 .flags = IW_DESCR_FLAG_DUMP,
137 },
138 [SIOCSIWFREQ - SIOCIWFIRST] = {
139 .header_type = IW_HEADER_TYPE_FREQ,
140 .flags = IW_DESCR_FLAG_EVENT,
141 },
142 [SIOCGIWFREQ - SIOCIWFIRST] = {
143 .header_type = IW_HEADER_TYPE_FREQ,
144 .flags = IW_DESCR_FLAG_DUMP,
145 },
146 [SIOCSIWMODE - SIOCIWFIRST] = {
147 .header_type = IW_HEADER_TYPE_UINT,
148 .flags = IW_DESCR_FLAG_EVENT,
149 },
150 [SIOCGIWMODE - SIOCIWFIRST] = {
151 .header_type = IW_HEADER_TYPE_UINT,
152 .flags = IW_DESCR_FLAG_DUMP,
153 },
154 [SIOCSIWSENS - SIOCIWFIRST] = {
155 .header_type = IW_HEADER_TYPE_PARAM,
156 },
157 [SIOCGIWSENS - SIOCIWFIRST] = {
158 .header_type = IW_HEADER_TYPE_PARAM,
159 },
160 [SIOCSIWRANGE - SIOCIWFIRST] = {
161 .header_type = IW_HEADER_TYPE_NULL,
162 },
163 [SIOCGIWRANGE - SIOCIWFIRST] = {
164 .header_type = IW_HEADER_TYPE_POINT,
165 .token_size = 1,
166 .max_tokens = sizeof(struct iw_range),
167 .flags = IW_DESCR_FLAG_DUMP,
168 },
169 [SIOCSIWPRIV - SIOCIWFIRST] = {
170 .header_type = IW_HEADER_TYPE_NULL,
171 },
172 [SIOCGIWPRIV - SIOCIWFIRST] = { /* (handled directly by us) */
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800173 .header_type = IW_HEADER_TYPE_POINT,
174 .token_size = sizeof(struct iw_priv_args),
175 .max_tokens = 16,
176 .flags = IW_DESCR_FLAG_NOMAX,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 },
178 [SIOCSIWSTATS - SIOCIWFIRST] = {
179 .header_type = IW_HEADER_TYPE_NULL,
180 },
181 [SIOCGIWSTATS - SIOCIWFIRST] = { /* (handled directly by us) */
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800182 .header_type = IW_HEADER_TYPE_POINT,
183 .token_size = 1,
184 .max_tokens = sizeof(struct iw_statistics),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 .flags = IW_DESCR_FLAG_DUMP,
186 },
187 [SIOCSIWSPY - SIOCIWFIRST] = {
188 .header_type = IW_HEADER_TYPE_POINT,
189 .token_size = sizeof(struct sockaddr),
190 .max_tokens = IW_MAX_SPY,
191 },
192 [SIOCGIWSPY - SIOCIWFIRST] = {
193 .header_type = IW_HEADER_TYPE_POINT,
194 .token_size = sizeof(struct sockaddr) +
195 sizeof(struct iw_quality),
196 .max_tokens = IW_MAX_SPY,
197 },
198 [SIOCSIWTHRSPY - SIOCIWFIRST] = {
199 .header_type = IW_HEADER_TYPE_POINT,
200 .token_size = sizeof(struct iw_thrspy),
201 .min_tokens = 1,
202 .max_tokens = 1,
203 },
204 [SIOCGIWTHRSPY - SIOCIWFIRST] = {
205 .header_type = IW_HEADER_TYPE_POINT,
206 .token_size = sizeof(struct iw_thrspy),
207 .min_tokens = 1,
208 .max_tokens = 1,
209 },
210 [SIOCSIWAP - SIOCIWFIRST] = {
211 .header_type = IW_HEADER_TYPE_ADDR,
212 },
213 [SIOCGIWAP - SIOCIWFIRST] = {
214 .header_type = IW_HEADER_TYPE_ADDR,
215 .flags = IW_DESCR_FLAG_DUMP,
216 },
fff9cfd2005-05-12 20:24:19 -0400217 [SIOCSIWMLME - SIOCIWFIRST] = {
218 .header_type = IW_HEADER_TYPE_POINT,
219 .token_size = 1,
220 .min_tokens = sizeof(struct iw_mlme),
221 .max_tokens = sizeof(struct iw_mlme),
222 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 [SIOCGIWAPLIST - SIOCIWFIRST] = {
224 .header_type = IW_HEADER_TYPE_POINT,
225 .token_size = sizeof(struct sockaddr) +
226 sizeof(struct iw_quality),
227 .max_tokens = IW_MAX_AP,
228 .flags = IW_DESCR_FLAG_NOMAX,
229 },
230 [SIOCSIWSCAN - SIOCIWFIRST] = {
fff9cfd2005-05-12 20:24:19 -0400231 .header_type = IW_HEADER_TYPE_POINT,
232 .token_size = 1,
233 .min_tokens = 0,
234 .max_tokens = sizeof(struct iw_scan_req),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 },
236 [SIOCGIWSCAN - SIOCIWFIRST] = {
237 .header_type = IW_HEADER_TYPE_POINT,
238 .token_size = 1,
239 .max_tokens = IW_SCAN_MAX_DATA,
240 .flags = IW_DESCR_FLAG_NOMAX,
241 },
242 [SIOCSIWESSID - SIOCIWFIRST] = {
243 .header_type = IW_HEADER_TYPE_POINT,
244 .token_size = 1,
John W. Linvillebaef1862006-09-08 16:04:05 -0400245 .max_tokens = IW_ESSID_MAX_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 .flags = IW_DESCR_FLAG_EVENT,
247 },
248 [SIOCGIWESSID - SIOCIWFIRST] = {
249 .header_type = IW_HEADER_TYPE_POINT,
250 .token_size = 1,
John W. Linvillebaef1862006-09-08 16:04:05 -0400251 .max_tokens = IW_ESSID_MAX_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 .flags = IW_DESCR_FLAG_DUMP,
253 },
254 [SIOCSIWNICKN - SIOCIWFIRST] = {
255 .header_type = IW_HEADER_TYPE_POINT,
256 .token_size = 1,
John W. Linvillebaef1862006-09-08 16:04:05 -0400257 .max_tokens = IW_ESSID_MAX_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 },
259 [SIOCGIWNICKN - SIOCIWFIRST] = {
260 .header_type = IW_HEADER_TYPE_POINT,
261 .token_size = 1,
John W. Linvillebaef1862006-09-08 16:04:05 -0400262 .max_tokens = IW_ESSID_MAX_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 },
264 [SIOCSIWRATE - SIOCIWFIRST] = {
265 .header_type = IW_HEADER_TYPE_PARAM,
266 },
267 [SIOCGIWRATE - SIOCIWFIRST] = {
268 .header_type = IW_HEADER_TYPE_PARAM,
269 },
270 [SIOCSIWRTS - SIOCIWFIRST] = {
271 .header_type = IW_HEADER_TYPE_PARAM,
272 },
273 [SIOCGIWRTS - SIOCIWFIRST] = {
274 .header_type = IW_HEADER_TYPE_PARAM,
275 },
276 [SIOCSIWFRAG - SIOCIWFIRST] = {
277 .header_type = IW_HEADER_TYPE_PARAM,
278 },
279 [SIOCGIWFRAG - SIOCIWFIRST] = {
280 .header_type = IW_HEADER_TYPE_PARAM,
281 },
282 [SIOCSIWTXPOW - SIOCIWFIRST] = {
283 .header_type = IW_HEADER_TYPE_PARAM,
284 },
285 [SIOCGIWTXPOW - SIOCIWFIRST] = {
286 .header_type = IW_HEADER_TYPE_PARAM,
287 },
288 [SIOCSIWRETRY - SIOCIWFIRST] = {
289 .header_type = IW_HEADER_TYPE_PARAM,
290 },
291 [SIOCGIWRETRY - SIOCIWFIRST] = {
292 .header_type = IW_HEADER_TYPE_PARAM,
293 },
294 [SIOCSIWENCODE - SIOCIWFIRST] = {
295 .header_type = IW_HEADER_TYPE_POINT,
296 .token_size = 1,
297 .max_tokens = IW_ENCODING_TOKEN_MAX,
298 .flags = IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT,
299 },
300 [SIOCGIWENCODE - SIOCIWFIRST] = {
301 .header_type = IW_HEADER_TYPE_POINT,
302 .token_size = 1,
303 .max_tokens = IW_ENCODING_TOKEN_MAX,
304 .flags = IW_DESCR_FLAG_DUMP | IW_DESCR_FLAG_RESTRICT,
305 },
306 [SIOCSIWPOWER - SIOCIWFIRST] = {
307 .header_type = IW_HEADER_TYPE_PARAM,
308 },
309 [SIOCGIWPOWER - SIOCIWFIRST] = {
310 .header_type = IW_HEADER_TYPE_PARAM,
311 },
fff9cfd2005-05-12 20:24:19 -0400312 [SIOCSIWGENIE - SIOCIWFIRST] = {
313 .header_type = IW_HEADER_TYPE_POINT,
314 .token_size = 1,
315 .max_tokens = IW_GENERIC_IE_MAX,
316 },
317 [SIOCGIWGENIE - SIOCIWFIRST] = {
318 .header_type = IW_HEADER_TYPE_POINT,
319 .token_size = 1,
320 .max_tokens = IW_GENERIC_IE_MAX,
321 },
322 [SIOCSIWAUTH - SIOCIWFIRST] = {
323 .header_type = IW_HEADER_TYPE_PARAM,
324 },
325 [SIOCGIWAUTH - SIOCIWFIRST] = {
326 .header_type = IW_HEADER_TYPE_PARAM,
327 },
328 [SIOCSIWENCODEEXT - SIOCIWFIRST] = {
329 .header_type = IW_HEADER_TYPE_POINT,
330 .token_size = 1,
331 .min_tokens = sizeof(struct iw_encode_ext),
332 .max_tokens = sizeof(struct iw_encode_ext) +
333 IW_ENCODING_TOKEN_MAX,
334 },
335 [SIOCGIWENCODEEXT - SIOCIWFIRST] = {
336 .header_type = IW_HEADER_TYPE_POINT,
337 .token_size = 1,
338 .min_tokens = sizeof(struct iw_encode_ext),
339 .max_tokens = sizeof(struct iw_encode_ext) +
340 IW_ENCODING_TOKEN_MAX,
341 },
342 [SIOCSIWPMKSA - SIOCIWFIRST] = {
343 .header_type = IW_HEADER_TYPE_POINT,
344 .token_size = 1,
345 .min_tokens = sizeof(struct iw_pmksa),
346 .max_tokens = sizeof(struct iw_pmksa),
347 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348};
John W. Linvillebaef1862006-09-08 16:04:05 -0400349static const unsigned standard_ioctl_num = (sizeof(standard_ioctl) /
350 sizeof(struct iw_ioctl_description));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352/*
353 * Meta-data about all the additional standard Wireless Extension events
354 * we know about.
355 */
356static const struct iw_ioctl_description standard_event[] = {
357 [IWEVTXDROP - IWEVFIRST] = {
358 .header_type = IW_HEADER_TYPE_ADDR,
359 },
360 [IWEVQUAL - IWEVFIRST] = {
361 .header_type = IW_HEADER_TYPE_QUAL,
362 },
363 [IWEVCUSTOM - IWEVFIRST] = {
364 .header_type = IW_HEADER_TYPE_POINT,
365 .token_size = 1,
366 .max_tokens = IW_CUSTOM_MAX,
367 },
368 [IWEVREGISTERED - IWEVFIRST] = {
369 .header_type = IW_HEADER_TYPE_ADDR,
370 },
371 [IWEVEXPIRED - IWEVFIRST] = {
372 .header_type = IW_HEADER_TYPE_ADDR,
373 },
fff9cfd2005-05-12 20:24:19 -0400374 [IWEVGENIE - IWEVFIRST] = {
375 .header_type = IW_HEADER_TYPE_POINT,
376 .token_size = 1,
377 .max_tokens = IW_GENERIC_IE_MAX,
378 },
379 [IWEVMICHAELMICFAILURE - IWEVFIRST] = {
380 .header_type = IW_HEADER_TYPE_POINT,
381 .token_size = 1,
382 .max_tokens = sizeof(struct iw_michaelmicfailure),
383 },
384 [IWEVASSOCREQIE - IWEVFIRST] = {
385 .header_type = IW_HEADER_TYPE_POINT,
386 .token_size = 1,
387 .max_tokens = IW_GENERIC_IE_MAX,
388 },
389 [IWEVASSOCRESPIE - IWEVFIRST] = {
390 .header_type = IW_HEADER_TYPE_POINT,
391 .token_size = 1,
392 .max_tokens = IW_GENERIC_IE_MAX,
393 },
394 [IWEVPMKIDCAND - IWEVFIRST] = {
395 .header_type = IW_HEADER_TYPE_POINT,
396 .token_size = 1,
397 .max_tokens = sizeof(struct iw_pmkid_cand),
398 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399};
John W. Linvillebaef1862006-09-08 16:04:05 -0400400static const unsigned standard_event_num = (sizeof(standard_event) /
401 sizeof(struct iw_ioctl_description));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403/* Size (in bytes) of the various private data types */
404static const char iw_priv_type_size[] = {
405 0, /* IW_PRIV_TYPE_NONE */
406 1, /* IW_PRIV_TYPE_BYTE */
407 1, /* IW_PRIV_TYPE_CHAR */
408 0, /* Not defined */
409 sizeof(__u32), /* IW_PRIV_TYPE_INT */
410 sizeof(struct iw_freq), /* IW_PRIV_TYPE_FLOAT */
411 sizeof(struct sockaddr), /* IW_PRIV_TYPE_ADDR */
412 0, /* Not defined */
413};
414
415/* Size (in bytes) of various events */
416static const int event_type_size[] = {
417 IW_EV_LCP_LEN, /* IW_HEADER_TYPE_NULL */
418 0,
419 IW_EV_CHAR_LEN, /* IW_HEADER_TYPE_CHAR */
420 0,
421 IW_EV_UINT_LEN, /* IW_HEADER_TYPE_UINT */
422 IW_EV_FREQ_LEN, /* IW_HEADER_TYPE_FREQ */
423 IW_EV_ADDR_LEN, /* IW_HEADER_TYPE_ADDR */
424 0,
425 IW_EV_POINT_LEN, /* Without variable payload */
426 IW_EV_PARAM_LEN, /* IW_HEADER_TYPE_PARAM */
427 IW_EV_QUAL_LEN, /* IW_HEADER_TYPE_QUAL */
428};
429
430/************************ COMMON SUBROUTINES ************************/
431/*
432 * Stuff that may be used in various place or doesn't fit in one
433 * of the section below.
434 */
435
436/* ---------------------------------------------------------------- */
437/*
438 * Return the driver handler associated with a specific Wireless Extension.
439 * Called from various place, so make sure it remains efficient.
440 */
441static inline iw_handler get_handler(struct net_device *dev,
442 unsigned int cmd)
443{
444 /* Don't "optimise" the following variable, it will crash */
445 unsigned int index; /* *MUST* be unsigned */
446
447 /* Check if we have some wireless handlers defined */
448 if(dev->wireless_handlers == NULL)
449 return NULL;
450
451 /* Try as a standard command */
452 index = cmd - SIOCIWFIRST;
453 if(index < dev->wireless_handlers->num_standard)
454 return dev->wireless_handlers->standard[index];
455
456 /* Try as a private command */
457 index = cmd - SIOCIWFIRSTPRIV;
458 if(index < dev->wireless_handlers->num_private)
459 return dev->wireless_handlers->private[index];
460
461 /* Not found */
462 return NULL;
463}
464
465/* ---------------------------------------------------------------- */
466/*
467 * Get statistics out of the driver
468 */
469static inline struct iw_statistics *get_wireless_stats(struct net_device *dev)
470{
471 /* New location */
472 if((dev->wireless_handlers != NULL) &&
473 (dev->wireless_handlers->get_wireless_stats != NULL))
474 return dev->wireless_handlers->get_wireless_stats(dev);
475
Jean Tourrilhes6582c162005-09-02 11:32:28 -0700476 /* Not found */
477 return (struct iw_statistics *) NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478}
479
480/* ---------------------------------------------------------------- */
481/*
482 * Call the commit handler in the driver
483 * (if exist and if conditions are right)
484 *
485 * Note : our current commit strategy is currently pretty dumb,
486 * but we will be able to improve on that...
487 * The goal is to try to agreagate as many changes as possible
488 * before doing the commit. Drivers that will define a commit handler
489 * are usually those that need a reset after changing parameters, so
490 * we want to minimise the number of reset.
491 * A cool idea is to use a timer : at each "set" command, we re-set the
492 * timer, when the timer eventually fires, we call the driver.
493 * Hopefully, more on that later.
494 *
495 * Also, I'm waiting to see how many people will complain about the
496 * netif_running(dev) test. I'm open on that one...
497 * Hopefully, the driver will remember to do a commit in "open()" ;-)
498 */
499static inline int call_commit_handler(struct net_device * dev)
500{
501 if((netif_running(dev)) &&
502 (dev->wireless_handlers->standard[0] != NULL)) {
503 /* Call the commit handler on the driver */
504 return dev->wireless_handlers->standard[0](dev, NULL,
505 NULL, NULL);
506 } else
507 return 0; /* Command completed successfully */
508}
509
510/* ---------------------------------------------------------------- */
511/*
512 * Calculate size of private arguments
513 */
514static inline int get_priv_size(__u16 args)
515{
516 int num = args & IW_PRIV_SIZE_MASK;
517 int type = (args & IW_PRIV_TYPE_MASK) >> 12;
518
519 return num * iw_priv_type_size[type];
520}
521
522/* ---------------------------------------------------------------- */
523/*
524 * Re-calculate the size of private arguments
525 */
526static inline int adjust_priv_size(__u16 args,
527 union iwreq_data * wrqu)
528{
529 int num = wrqu->data.length;
530 int max = args & IW_PRIV_SIZE_MASK;
531 int type = (args & IW_PRIV_TYPE_MASK) >> 12;
532
533 /* Make sure the driver doesn't goof up */
534 if (max < num)
535 num = max;
536
537 return num * iw_priv_type_size[type];
538}
539
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800540/* ---------------------------------------------------------------- */
541/*
542 * Standard Wireless Handler : get wireless stats
543 * Allow programatic access to /proc/net/wireless even if /proc
544 * doesn't exist... Also more efficient...
545 */
546static int iw_handler_get_iwstats(struct net_device * dev,
547 struct iw_request_info * info,
548 union iwreq_data * wrqu,
549 char * extra)
550{
551 /* Get stats from the driver */
552 struct iw_statistics *stats;
553
554 stats = get_wireless_stats(dev);
555 if (stats != (struct iw_statistics *) NULL) {
556
557 /* Copy statistics to extra */
558 memcpy(extra, stats, sizeof(struct iw_statistics));
559 wrqu->data.length = sizeof(struct iw_statistics);
560
561 /* Check if we need to clear the updated flag */
562 if(wrqu->data.flags != 0)
563 stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
564 return 0;
565 } else
566 return -EOPNOTSUPP;
567}
568
569/* ---------------------------------------------------------------- */
570/*
571 * Standard Wireless Handler : get iwpriv definitions
572 * Export the driver private handler definition
573 * They will be picked up by tools like iwpriv...
574 */
575static int iw_handler_get_private(struct net_device * dev,
576 struct iw_request_info * info,
577 union iwreq_data * wrqu,
578 char * extra)
579{
580 /* Check if the driver has something to export */
581 if((dev->wireless_handlers->num_private_args == 0) ||
582 (dev->wireless_handlers->private_args == NULL))
583 return -EOPNOTSUPP;
584
585 /* Check if there is enough buffer up there */
586 if(wrqu->data.length < dev->wireless_handlers->num_private_args) {
587 /* User space can't know in advance how large the buffer
588 * needs to be. Give it a hint, so that we can support
589 * any size buffer we want somewhat efficiently... */
590 wrqu->data.length = dev->wireless_handlers->num_private_args;
591 return -E2BIG;
592 }
593
594 /* Set the number of available ioctls. */
595 wrqu->data.length = dev->wireless_handlers->num_private_args;
596
597 /* Copy structure to the user buffer. */
598 memcpy(extra, dev->wireless_handlers->private_args,
599 sizeof(struct iw_priv_args) * wrqu->data.length);
600
601 return 0;
602}
603
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
605/******************** /proc/net/wireless SUPPORT ********************/
606/*
607 * The /proc/net/wireless file is a human readable user-space interface
608 * exporting various wireless specific statistics from the wireless devices.
609 * This is the most popular part of the Wireless Extensions ;-)
610 *
611 * This interface is a pure clone of /proc/net/dev (in net/core/dev.c).
612 * The content of the file is basically the content of "struct iw_statistics".
613 */
614
615#ifdef CONFIG_PROC_FS
616
617/* ---------------------------------------------------------------- */
618/*
619 * Print one entry (line) of /proc/net/wireless
620 */
621static __inline__ void wireless_seq_printf_stats(struct seq_file *seq,
622 struct net_device *dev)
623{
624 /* Get stats from the driver */
625 struct iw_statistics *stats = get_wireless_stats(dev);
626
627 if (stats) {
628 seq_printf(seq, "%6s: %04x %3d%c %3d%c %3d%c %6d %6d %6d "
629 "%6d %6d %6d\n",
630 dev->name, stats->status, stats->qual.qual,
631 stats->qual.updated & IW_QUAL_QUAL_UPDATED
632 ? '.' : ' ',
Jean Tourrilhes6582c162005-09-02 11:32:28 -0700633 ((__s32) stats->qual.level) -
634 ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 stats->qual.updated & IW_QUAL_LEVEL_UPDATED
636 ? '.' : ' ',
Jean Tourrilhes6582c162005-09-02 11:32:28 -0700637 ((__s32) stats->qual.noise) -
638 ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 stats->qual.updated & IW_QUAL_NOISE_UPDATED
640 ? '.' : ' ',
641 stats->discard.nwid, stats->discard.code,
642 stats->discard.fragment, stats->discard.retries,
643 stats->discard.misc, stats->miss.beacon);
Jean Tourrilhes6582c162005-09-02 11:32:28 -0700644 stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 }
646}
647
648/* ---------------------------------------------------------------- */
649/*
650 * Print info for /proc/net/wireless (print all entries)
651 */
652static int wireless_seq_show(struct seq_file *seq, void *v)
653{
654 if (v == SEQ_START_TOKEN)
655 seq_printf(seq, "Inter-| sta-| Quality | Discarded "
656 "packets | Missed | WE\n"
657 " face | tus | link level noise | nwid "
658 "crypt frag retry misc | beacon | %d\n",
659 WIRELESS_EXT);
660 else
661 wireless_seq_printf_stats(seq, v);
662 return 0;
663}
664
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665static struct seq_operations wireless_seq_ops = {
666 .start = dev_seq_start,
667 .next = dev_seq_next,
668 .stop = dev_seq_stop,
669 .show = wireless_seq_show,
670};
671
672static int wireless_seq_open(struct inode *inode, struct file *file)
673{
674 return seq_open(file, &wireless_seq_ops);
675}
676
677static struct file_operations wireless_seq_fops = {
678 .owner = THIS_MODULE,
679 .open = wireless_seq_open,
680 .read = seq_read,
681 .llseek = seq_lseek,
682 .release = seq_release,
683};
684
685int __init wireless_proc_init(void)
686{
Jean Tourrilhes6582c162005-09-02 11:32:28 -0700687 /* Create /proc/net/wireless entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 if (!proc_net_fops_create("wireless", S_IRUGO, &wireless_seq_fops))
689 return -ENOMEM;
690
691 return 0;
692}
693#endif /* CONFIG_PROC_FS */
694
695/************************** IOCTL SUPPORT **************************/
696/*
697 * The original user space API to configure all those Wireless Extensions
698 * is through IOCTLs.
699 * In there, we check if we need to call the new driver API (iw_handler)
700 * or just call the driver ioctl handler.
701 */
702
703/* ---------------------------------------------------------------- */
704/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 * Wrapper to call a standard Wireless Extension handler.
706 * We do various checks and also take care of moving data between
707 * user space and kernel space.
708 */
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800709static int ioctl_standard_call(struct net_device * dev,
710 struct ifreq * ifr,
711 unsigned int cmd,
712 iw_handler handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713{
714 struct iwreq * iwr = (struct iwreq *) ifr;
715 const struct iw_ioctl_description * descr;
716 struct iw_request_info info;
717 int ret = -EINVAL;
718
719 /* Get the description of the IOCTL */
720 if((cmd - SIOCIWFIRST) >= standard_ioctl_num)
721 return -EOPNOTSUPP;
722 descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
723
724#ifdef WE_IOCTL_DEBUG
725 printk(KERN_DEBUG "%s (WE) : Found standard handler for 0x%04X\n",
726 ifr->ifr_name, cmd);
727 printk(KERN_DEBUG "%s (WE) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
728#endif /* WE_IOCTL_DEBUG */
729
730 /* Prepare the call */
731 info.cmd = cmd;
732 info.flags = 0;
733
734 /* Check if we have a pointer to user space data or not */
735 if(descr->header_type != IW_HEADER_TYPE_POINT) {
736
737 /* No extra arguments. Trivial to handle */
738 ret = handler(dev, &info, &(iwr->u), NULL);
739
740#ifdef WE_SET_EVENT
741 /* Generate an event to notify listeners of the change */
742 if((descr->flags & IW_DESCR_FLAG_EVENT) &&
743 ((ret == 0) || (ret == -EIWCOMMIT)))
744 wireless_send_event(dev, cmd, &(iwr->u), NULL);
745#endif /* WE_SET_EVENT */
746 } else {
747 char * extra;
748 int extra_size;
749 int user_length = 0;
750 int err;
751
752 /* Calculate space needed by arguments. Always allocate
753 * for max space. Easier, and won't last long... */
754 extra_size = descr->max_tokens * descr->token_size;
755
756 /* Check what user space is giving us */
757 if(IW_IS_SET(cmd)) {
758 /* Check NULL pointer */
759 if((iwr->u.data.pointer == NULL) &&
760 (iwr->u.data.length != 0))
761 return -EFAULT;
762 /* Check if number of token fits within bounds */
763 if(iwr->u.data.length > descr->max_tokens)
764 return -E2BIG;
765 if(iwr->u.data.length < descr->min_tokens)
766 return -EINVAL;
767 } else {
768 /* Check NULL pointer */
769 if(iwr->u.data.pointer == NULL)
770 return -EFAULT;
771 /* Save user space buffer size for checking */
772 user_length = iwr->u.data.length;
773
774 /* Don't check if user_length > max to allow forward
775 * compatibility. The test user_length < min is
776 * implied by the test at the end. */
777
778 /* Support for very large requests */
779 if((descr->flags & IW_DESCR_FLAG_NOMAX) &&
780 (user_length > descr->max_tokens)) {
781 /* Allow userspace to GET more than max so
782 * we can support any size GET requests.
783 * There is still a limit : -ENOMEM. */
784 extra_size = user_length * descr->token_size;
785 /* Note : user_length is originally a __u16,
786 * and token_size is controlled by us,
787 * so extra_size won't get negative and
788 * won't overflow... */
789 }
790 }
791
792#ifdef WE_IOCTL_DEBUG
793 printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
794 dev->name, extra_size);
795#endif /* WE_IOCTL_DEBUG */
796
797 /* Create the kernel buffer */
798 extra = kmalloc(extra_size, GFP_KERNEL);
799 if (extra == NULL) {
800 return -ENOMEM;
801 }
802
803 /* If it is a SET, get all the extra data in here */
804 if(IW_IS_SET(cmd) && (iwr->u.data.length != 0)) {
805 err = copy_from_user(extra, iwr->u.data.pointer,
806 iwr->u.data.length *
807 descr->token_size);
808 if (err) {
809 kfree(extra);
810 return -EFAULT;
811 }
812#ifdef WE_IOCTL_DEBUG
813 printk(KERN_DEBUG "%s (WE) : Got %d bytes\n",
814 dev->name,
815 iwr->u.data.length * descr->token_size);
816#endif /* WE_IOCTL_DEBUG */
817 }
818
819 /* Call the handler */
820 ret = handler(dev, &info, &(iwr->u), extra);
821
822 /* If we have something to return to the user */
823 if (!ret && IW_IS_GET(cmd)) {
824 /* Check if there is enough buffer up there */
825 if(user_length < iwr->u.data.length) {
826 kfree(extra);
827 return -E2BIG;
828 }
829
830 err = copy_to_user(iwr->u.data.pointer, extra,
831 iwr->u.data.length *
832 descr->token_size);
833 if (err)
834 ret = -EFAULT;
835#ifdef WE_IOCTL_DEBUG
836 printk(KERN_DEBUG "%s (WE) : Wrote %d bytes\n",
837 dev->name,
838 iwr->u.data.length * descr->token_size);
839#endif /* WE_IOCTL_DEBUG */
840 }
841
842#ifdef WE_SET_EVENT
843 /* Generate an event to notify listeners of the change */
844 if((descr->flags & IW_DESCR_FLAG_EVENT) &&
845 ((ret == 0) || (ret == -EIWCOMMIT))) {
846 if(descr->flags & IW_DESCR_FLAG_RESTRICT)
847 /* If the event is restricted, don't
848 * export the payload */
849 wireless_send_event(dev, cmd, &(iwr->u), NULL);
850 else
851 wireless_send_event(dev, cmd, &(iwr->u),
852 extra);
853 }
854#endif /* WE_SET_EVENT */
855
856 /* Cleanup - I told you it wasn't that long ;-) */
857 kfree(extra);
858 }
859
860 /* Call commit handler if needed and defined */
861 if(ret == -EIWCOMMIT)
862 ret = call_commit_handler(dev);
863
864 /* Here, we will generate the appropriate event if needed */
865
866 return ret;
867}
868
869/* ---------------------------------------------------------------- */
870/*
871 * Wrapper to call a private Wireless Extension handler.
872 * We do various checks and also take care of moving data between
873 * user space and kernel space.
874 * It's not as nice and slimline as the standard wrapper. The cause
875 * is struct iw_priv_args, which was not really designed for the
876 * job we are going here.
877 *
878 * IMPORTANT : This function prevent to set and get data on the same
879 * IOCTL and enforce the SET/GET convention. Not doing it would be
880 * far too hairy...
881 * If you need to set and get data at the same time, please don't use
882 * a iw_handler but process it in your ioctl handler (i.e. use the
883 * old driver API).
884 */
885static inline int ioctl_private_call(struct net_device * dev,
886 struct ifreq * ifr,
887 unsigned int cmd,
888 iw_handler handler)
889{
890 struct iwreq * iwr = (struct iwreq *) ifr;
891 const struct iw_priv_args * descr = NULL;
892 struct iw_request_info info;
893 int extra_size = 0;
894 int i;
895 int ret = -EINVAL;
896
897 /* Get the description of the IOCTL */
898 for(i = 0; i < dev->wireless_handlers->num_private_args; i++)
899 if(cmd == dev->wireless_handlers->private_args[i].cmd) {
900 descr = &(dev->wireless_handlers->private_args[i]);
901 break;
902 }
903
904#ifdef WE_IOCTL_DEBUG
905 printk(KERN_DEBUG "%s (WE) : Found private handler for 0x%04X\n",
906 ifr->ifr_name, cmd);
907 if(descr) {
908 printk(KERN_DEBUG "%s (WE) : Name %s, set %X, get %X\n",
909 dev->name, descr->name,
910 descr->set_args, descr->get_args);
911 }
912#endif /* WE_IOCTL_DEBUG */
913
914 /* Compute the size of the set/get arguments */
915 if(descr != NULL) {
916 if(IW_IS_SET(cmd)) {
917 int offset = 0; /* For sub-ioctls */
918 /* Check for sub-ioctl handler */
919 if(descr->name[0] == '\0')
920 /* Reserve one int for sub-ioctl index */
921 offset = sizeof(__u32);
922
923 /* Size of set arguments */
924 extra_size = get_priv_size(descr->set_args);
925
926 /* Does it fits in iwr ? */
927 if((descr->set_args & IW_PRIV_SIZE_FIXED) &&
928 ((extra_size + offset) <= IFNAMSIZ))
929 extra_size = 0;
930 } else {
931 /* Size of get arguments */
932 extra_size = get_priv_size(descr->get_args);
933
934 /* Does it fits in iwr ? */
935 if((descr->get_args & IW_PRIV_SIZE_FIXED) &&
936 (extra_size <= IFNAMSIZ))
937 extra_size = 0;
938 }
939 }
940
941 /* Prepare the call */
942 info.cmd = cmd;
943 info.flags = 0;
944
945 /* Check if we have a pointer to user space data or not. */
946 if(extra_size == 0) {
947 /* No extra arguments. Trivial to handle */
948 ret = handler(dev, &info, &(iwr->u), (char *) &(iwr->u));
949 } else {
950 char * extra;
951 int err;
952
953 /* Check what user space is giving us */
954 if(IW_IS_SET(cmd)) {
955 /* Check NULL pointer */
956 if((iwr->u.data.pointer == NULL) &&
957 (iwr->u.data.length != 0))
958 return -EFAULT;
959
960 /* Does it fits within bounds ? */
961 if(iwr->u.data.length > (descr->set_args &
962 IW_PRIV_SIZE_MASK))
963 return -E2BIG;
964 } else {
965 /* Check NULL pointer */
966 if(iwr->u.data.pointer == NULL)
967 return -EFAULT;
968 }
969
970#ifdef WE_IOCTL_DEBUG
971 printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
972 dev->name, extra_size);
973#endif /* WE_IOCTL_DEBUG */
974
975 /* Always allocate for max space. Easier, and won't last
976 * long... */
977 extra = kmalloc(extra_size, GFP_KERNEL);
978 if (extra == NULL) {
979 return -ENOMEM;
980 }
981
982 /* If it is a SET, get all the extra data in here */
983 if(IW_IS_SET(cmd) && (iwr->u.data.length != 0)) {
984 err = copy_from_user(extra, iwr->u.data.pointer,
985 extra_size);
986 if (err) {
987 kfree(extra);
988 return -EFAULT;
989 }
990#ifdef WE_IOCTL_DEBUG
991 printk(KERN_DEBUG "%s (WE) : Got %d elem\n",
992 dev->name, iwr->u.data.length);
993#endif /* WE_IOCTL_DEBUG */
994 }
995
996 /* Call the handler */
997 ret = handler(dev, &info, &(iwr->u), extra);
998
999 /* If we have something to return to the user */
1000 if (!ret && IW_IS_GET(cmd)) {
1001
1002 /* Adjust for the actual length if it's variable,
1003 * avoid leaking kernel bits outside. */
1004 if (!(descr->get_args & IW_PRIV_SIZE_FIXED)) {
1005 extra_size = adjust_priv_size(descr->get_args,
1006 &(iwr->u));
1007 }
1008
1009 err = copy_to_user(iwr->u.data.pointer, extra,
1010 extra_size);
1011 if (err)
1012 ret = -EFAULT;
1013#ifdef WE_IOCTL_DEBUG
1014 printk(KERN_DEBUG "%s (WE) : Wrote %d elem\n",
1015 dev->name, iwr->u.data.length);
1016#endif /* WE_IOCTL_DEBUG */
1017 }
1018
1019 /* Cleanup - I told you it wasn't that long ;-) */
1020 kfree(extra);
1021 }
1022
1023
1024 /* Call commit handler if needed and defined */
1025 if(ret == -EIWCOMMIT)
1026 ret = call_commit_handler(dev);
1027
1028 return ret;
1029}
1030
1031/* ---------------------------------------------------------------- */
1032/*
1033 * Main IOCTl dispatcher. Called from the main networking code
1034 * (dev_ioctl() in net/core/dev.c).
1035 * Check the type of IOCTL and call the appropriate wrapper...
1036 */
1037int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd)
1038{
1039 struct net_device *dev;
1040 iw_handler handler;
1041
1042 /* Permissions are already checked in dev_ioctl() before calling us.
1043 * The copy_to/from_user() of ifr is also dealt with in there */
1044
1045 /* Make sure the device exist */
1046 if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL)
1047 return -ENODEV;
1048
1049 /* A bunch of special cases, then the generic case...
1050 * Note that 'cmd' is already filtered in dev_ioctl() with
1051 * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */
1052 switch(cmd)
1053 {
1054 case SIOCGIWSTATS:
1055 /* Get Wireless Stats */
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001056 return ioctl_standard_call(dev,
1057 ifr,
1058 cmd,
1059 &iw_handler_get_iwstats);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060
1061 case SIOCGIWPRIV:
1062 /* Check if we have some wireless handlers defined */
1063 if(dev->wireless_handlers != NULL) {
1064 /* We export to user space the definition of
1065 * the private handler ourselves */
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001066 return ioctl_standard_call(dev,
1067 ifr,
1068 cmd,
1069 &iw_handler_get_private);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 }
1071 // ## Fall-through for old API ##
1072 default:
1073 /* Generic IOCTL */
1074 /* Basic check */
1075 if (!netif_device_present(dev))
1076 return -ENODEV;
1077 /* New driver API : try to find the handler */
1078 handler = get_handler(dev, cmd);
1079 if(handler != NULL) {
1080 /* Standard and private are not the same */
1081 if(cmd < SIOCIWFIRSTPRIV)
1082 return ioctl_standard_call(dev,
1083 ifr,
1084 cmd,
1085 handler);
1086 else
1087 return ioctl_private_call(dev,
1088 ifr,
1089 cmd,
1090 handler);
1091 }
1092 /* Old driver API : call driver ioctl handler */
1093 if (dev->do_ioctl) {
1094 return dev->do_ioctl(dev, ifr, cmd);
1095 }
1096 return -EOPNOTSUPP;
1097 }
1098 /* Not reached */
1099 return -EINVAL;
1100}
1101
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001102/********************** RTNETLINK REQUEST API **********************/
1103/*
1104 * The alternate user space API to configure all those Wireless Extensions
1105 * is through RtNetlink.
1106 * This API support only the new driver API (iw_handler).
1107 *
1108 * This RtNetlink API use the same query/reply model as the ioctl API.
1109 * Maximum effort has been done to fit in the RtNetlink model, and
1110 * we support both RtNetlink Set and RtNelink Get operations.
1111 * On the other hand, we don't offer Dump operations because of the
1112 * following reasons :
1113 * o Large number of parameters, most optional
1114 * o Large size of some parameters (> 100 bytes)
1115 * o Each parameters need to be extracted from hardware
1116 * o Scan requests can take seconds and disable network activity.
1117 * Because of this high cost/overhead, we want to return only the
1118 * parameters the user application is really interested in.
1119 * We could offer partial Dump using the IW_DESCR_FLAG_DUMP flag.
1120 *
1121 * The API uses the standard RtNetlink socket. When the RtNetlink code
1122 * find a IFLA_WIRELESS field in a RtNetlink SET_LINK request,
1123 * it calls here.
1124 */
1125
1126#ifdef CONFIG_NET_WIRELESS_RTNETLINK
1127/* ---------------------------------------------------------------- */
1128/*
1129 * Wrapper to call a standard Wireless Extension GET handler.
1130 * We do various checks and call the handler with the proper args.
1131 */
1132static int rtnetlink_standard_get(struct net_device * dev,
1133 struct iw_event * request,
1134 int request_len,
1135 iw_handler handler,
1136 char ** p_buf,
1137 int * p_len)
1138{
1139 const struct iw_ioctl_description * descr = NULL;
1140 unsigned int cmd;
1141 union iwreq_data * wrqu;
1142 int hdr_len;
1143 struct iw_request_info info;
1144 char * buffer = NULL;
1145 int buffer_size = 0;
1146 int ret = -EINVAL;
1147
1148 /* Get the description of the Request */
1149 cmd = request->cmd;
1150 if((cmd - SIOCIWFIRST) >= standard_ioctl_num)
1151 return -EOPNOTSUPP;
1152 descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
1153
1154#ifdef WE_RTNETLINK_DEBUG
1155 printk(KERN_DEBUG "%s (WE.r) : Found standard handler for 0x%04X\n",
1156 dev->name, cmd);
1157 printk(KERN_DEBUG "%s (WE.r) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
1158#endif /* WE_RTNETLINK_DEBUG */
1159
1160 /* Check if wrqu is complete */
1161 hdr_len = event_type_size[descr->header_type];
1162 if(request_len < hdr_len) {
1163#ifdef WE_RTNETLINK_DEBUG
1164 printk(KERN_DEBUG
1165 "%s (WE.r) : Wireless request too short (%d)\n",
1166 dev->name, request_len);
1167#endif /* WE_RTNETLINK_DEBUG */
1168 return -EINVAL;
1169 }
1170
1171 /* Prepare the call */
1172 info.cmd = cmd;
1173 info.flags = 0;
1174
1175 /* Check if we have extra data in the reply or not */
1176 if(descr->header_type != IW_HEADER_TYPE_POINT) {
1177
1178 /* Create the kernel buffer that we will return.
1179 * It's at an offset to match the TYPE_POINT case... */
1180 buffer_size = request_len + IW_EV_POINT_OFF;
1181 buffer = kmalloc(buffer_size, GFP_KERNEL);
1182 if (buffer == NULL) {
1183 return -ENOMEM;
1184 }
1185 /* Copy event data */
1186 memcpy(buffer + IW_EV_POINT_OFF, request, request_len);
1187 /* Use our own copy of wrqu */
1188 wrqu = (union iwreq_data *) (buffer + IW_EV_POINT_OFF
1189 + IW_EV_LCP_LEN);
1190
1191 /* No extra arguments. Trivial to handle */
1192 ret = handler(dev, &info, wrqu, NULL);
1193
1194 } else {
1195 union iwreq_data wrqu_point;
1196 char * extra = NULL;
1197 int extra_size = 0;
1198
1199 /* Get a temp copy of wrqu (skip pointer) */
1200 memcpy(((char *) &wrqu_point) + IW_EV_POINT_OFF,
1201 ((char *) request) + IW_EV_LCP_LEN,
1202 IW_EV_POINT_LEN - IW_EV_LCP_LEN);
1203
1204 /* Calculate space needed by arguments. Always allocate
1205 * for max space. Easier, and won't last long... */
1206 extra_size = descr->max_tokens * descr->token_size;
1207 /* Support for very large requests */
1208 if((descr->flags & IW_DESCR_FLAG_NOMAX) &&
1209 (wrqu_point.data.length > descr->max_tokens))
1210 extra_size = (wrqu_point.data.length
1211 * descr->token_size);
1212 buffer_size = extra_size + IW_EV_POINT_LEN + IW_EV_POINT_OFF;
1213#ifdef WE_RTNETLINK_DEBUG
1214 printk(KERN_DEBUG "%s (WE.r) : Malloc %d bytes (%d bytes)\n",
1215 dev->name, extra_size, buffer_size);
1216#endif /* WE_RTNETLINK_DEBUG */
1217
1218 /* Create the kernel buffer that we will return */
1219 buffer = kmalloc(buffer_size, GFP_KERNEL);
1220 if (buffer == NULL) {
1221 return -ENOMEM;
1222 }
1223
1224 /* Put wrqu in the right place (just before extra).
1225 * Leave space for IWE header and dummy pointer...
1226 * Note that IW_EV_LCP_LEN==4 bytes, so it's still aligned...
1227 */
1228 memcpy(buffer + IW_EV_LCP_LEN + IW_EV_POINT_OFF,
1229 ((char *) &wrqu_point) + IW_EV_POINT_OFF,
1230 IW_EV_POINT_LEN - IW_EV_LCP_LEN);
1231 wrqu = (union iwreq_data *) (buffer + IW_EV_LCP_LEN);
1232
1233 /* Extra comes logically after that. Offset +12 bytes. */
1234 extra = buffer + IW_EV_POINT_OFF + IW_EV_POINT_LEN;
1235
1236 /* Call the handler */
1237 ret = handler(dev, &info, wrqu, extra);
1238
1239 /* Calculate real returned length */
1240 extra_size = (wrqu->data.length * descr->token_size);
1241 /* Re-adjust reply size */
1242 request->len = extra_size + IW_EV_POINT_LEN;
1243
1244 /* Put the iwe header where it should, i.e. scrap the
1245 * dummy pointer. */
1246 memcpy(buffer + IW_EV_POINT_OFF, request, IW_EV_LCP_LEN);
1247
1248#ifdef WE_RTNETLINK_DEBUG
1249 printk(KERN_DEBUG "%s (WE.r) : Reply 0x%04X, hdr_len %d, tokens %d, extra_size %d, buffer_size %d\n", dev->name, cmd, hdr_len, wrqu->data.length, extra_size, buffer_size);
1250#endif /* WE_RTNETLINK_DEBUG */
1251
1252 /* Check if there is enough buffer up there */
1253 if(wrqu_point.data.length < wrqu->data.length)
1254 ret = -E2BIG;
1255 }
1256
1257 /* Return the buffer to the caller */
1258 if (!ret) {
1259 *p_buf = buffer;
1260 *p_len = request->len;
1261 } else {
1262 /* Cleanup */
1263 if(buffer)
1264 kfree(buffer);
1265 }
1266
1267 return ret;
1268}
1269
1270/* ---------------------------------------------------------------- */
1271/*
1272 * Wrapper to call a standard Wireless Extension SET handler.
1273 * We do various checks and call the handler with the proper args.
1274 */
1275static inline int rtnetlink_standard_set(struct net_device * dev,
1276 struct iw_event * request,
1277 int request_len,
1278 iw_handler handler)
1279{
1280 const struct iw_ioctl_description * descr = NULL;
1281 unsigned int cmd;
1282 union iwreq_data * wrqu;
1283 union iwreq_data wrqu_point;
1284 int hdr_len;
1285 char * extra = NULL;
1286 int extra_size = 0;
1287 struct iw_request_info info;
1288 int ret = -EINVAL;
1289
1290 /* Get the description of the Request */
1291 cmd = request->cmd;
1292 if((cmd - SIOCIWFIRST) >= standard_ioctl_num)
1293 return -EOPNOTSUPP;
1294 descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
1295
1296#ifdef WE_RTNETLINK_DEBUG
1297 printk(KERN_DEBUG "%s (WE.r) : Found standard SET handler for 0x%04X\n",
1298 dev->name, cmd);
1299 printk(KERN_DEBUG "%s (WE.r) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
1300#endif /* WE_RTNETLINK_DEBUG */
1301
1302 /* Extract fixed header from request. This is properly aligned. */
1303 wrqu = &request->u;
1304
1305 /* Check if wrqu is complete */
1306 hdr_len = event_type_size[descr->header_type];
1307 if(request_len < hdr_len) {
1308#ifdef WE_RTNETLINK_DEBUG
1309 printk(KERN_DEBUG
1310 "%s (WE.r) : Wireless request too short (%d)\n",
1311 dev->name, request_len);
1312#endif /* WE_RTNETLINK_DEBUG */
1313 return -EINVAL;
1314 }
1315
1316 /* Prepare the call */
1317 info.cmd = cmd;
1318 info.flags = 0;
1319
1320 /* Check if we have extra data in the request or not */
1321 if(descr->header_type != IW_HEADER_TYPE_POINT) {
1322
1323 /* No extra arguments. Trivial to handle */
1324 ret = handler(dev, &info, wrqu, NULL);
1325
1326 } else {
1327 int extra_len;
1328
1329 /* Put wrqu in the right place (skip pointer) */
1330 memcpy(((char *) &wrqu_point) + IW_EV_POINT_OFF,
1331 wrqu, IW_EV_POINT_LEN - IW_EV_LCP_LEN);
1332 /* Don't forget about the event code... */
1333 wrqu = &wrqu_point;
1334
1335 /* Check if number of token fits within bounds */
1336 if(wrqu_point.data.length > descr->max_tokens)
1337 return -E2BIG;
1338 if(wrqu_point.data.length < descr->min_tokens)
1339 return -EINVAL;
1340
1341 /* Real length of payload */
1342 extra_len = wrqu_point.data.length * descr->token_size;
1343
1344 /* Check if request is self consistent */
1345 if((request_len - hdr_len) < extra_len) {
1346#ifdef WE_RTNETLINK_DEBUG
1347 printk(KERN_DEBUG "%s (WE.r) : Wireless request data too short (%d)\n",
1348 dev->name, extra_size);
1349#endif /* WE_RTNETLINK_DEBUG */
1350 return -EINVAL;
1351 }
1352
1353#ifdef WE_RTNETLINK_DEBUG
1354 printk(KERN_DEBUG "%s (WE.r) : Malloc %d bytes\n",
1355 dev->name, extra_size);
1356#endif /* WE_RTNETLINK_DEBUG */
1357
1358 /* Always allocate for max space. Easier, and won't last
1359 * long... */
1360 extra_size = descr->max_tokens * descr->token_size;
1361 extra = kmalloc(extra_size, GFP_KERNEL);
1362 if (extra == NULL)
1363 return -ENOMEM;
1364
1365 /* Copy extra in aligned buffer */
1366 memcpy(extra, ((char *) request) + hdr_len, extra_len);
1367
1368 /* Call the handler */
1369 ret = handler(dev, &info, &wrqu_point, extra);
1370 }
1371
1372#ifdef WE_SET_EVENT
1373 /* Generate an event to notify listeners of the change */
1374 if((descr->flags & IW_DESCR_FLAG_EVENT) &&
1375 ((ret == 0) || (ret == -EIWCOMMIT))) {
1376 if(descr->flags & IW_DESCR_FLAG_RESTRICT)
1377 /* If the event is restricted, don't
1378 * export the payload */
1379 wireless_send_event(dev, cmd, wrqu, NULL);
1380 else
1381 wireless_send_event(dev, cmd, wrqu, extra);
1382 }
1383#endif /* WE_SET_EVENT */
1384
1385 /* Cleanup - I told you it wasn't that long ;-) */
1386 if(extra)
1387 kfree(extra);
1388
1389 /* Call commit handler if needed and defined */
1390 if(ret == -EIWCOMMIT)
1391 ret = call_commit_handler(dev);
1392
1393 return ret;
1394}
1395
1396/* ---------------------------------------------------------------- */
1397/*
1398 * Wrapper to call a private Wireless Extension GET handler.
1399 * Same as above...
1400 * It's not as nice and slimline as the standard wrapper. The cause
1401 * is struct iw_priv_args, which was not really designed for the
1402 * job we are going here.
1403 *
1404 * IMPORTANT : This function prevent to set and get data on the same
1405 * IOCTL and enforce the SET/GET convention. Not doing it would be
1406 * far too hairy...
1407 * If you need to set and get data at the same time, please don't use
1408 * a iw_handler but process it in your ioctl handler (i.e. use the
1409 * old driver API).
1410 */
1411static inline int rtnetlink_private_get(struct net_device * dev,
1412 struct iw_event * request,
1413 int request_len,
1414 iw_handler handler,
1415 char ** p_buf,
1416 int * p_len)
1417{
1418 const struct iw_priv_args * descr = NULL;
1419 unsigned int cmd;
1420 union iwreq_data * wrqu;
1421 int hdr_len;
1422 struct iw_request_info info;
1423 int extra_size = 0;
1424 int i;
1425 char * buffer = NULL;
1426 int buffer_size = 0;
1427 int ret = -EINVAL;
1428
1429 /* Get the description of the Request */
1430 cmd = request->cmd;
1431 for(i = 0; i < dev->wireless_handlers->num_private_args; i++)
1432 if(cmd == dev->wireless_handlers->private_args[i].cmd) {
1433 descr = &(dev->wireless_handlers->private_args[i]);
1434 break;
1435 }
1436 if(descr == NULL)
1437 return -EOPNOTSUPP;
1438
1439#ifdef WE_RTNETLINK_DEBUG
1440 printk(KERN_DEBUG "%s (WE.r) : Found private handler for 0x%04X\n",
1441 dev->name, cmd);
1442 printk(KERN_DEBUG "%s (WE.r) : Name %s, set %X, get %X\n",
1443 dev->name, descr->name, descr->set_args, descr->get_args);
1444#endif /* WE_RTNETLINK_DEBUG */
1445
1446 /* Compute the max size of the get arguments */
1447 extra_size = get_priv_size(descr->get_args);
1448
1449 /* Does it fits in wrqu ? */
1450 if((descr->get_args & IW_PRIV_SIZE_FIXED) &&
1451 (extra_size <= IFNAMSIZ)) {
1452 hdr_len = extra_size;
1453 extra_size = 0;
1454 } else {
1455 hdr_len = IW_EV_POINT_LEN;
1456 }
1457
1458 /* Check if wrqu is complete */
1459 if(request_len < hdr_len) {
1460#ifdef WE_RTNETLINK_DEBUG
1461 printk(KERN_DEBUG
1462 "%s (WE.r) : Wireless request too short (%d)\n",
1463 dev->name, request_len);
1464#endif /* WE_RTNETLINK_DEBUG */
1465 return -EINVAL;
1466 }
1467
1468 /* Prepare the call */
1469 info.cmd = cmd;
1470 info.flags = 0;
1471
1472 /* Check if we have a pointer to user space data or not. */
1473 if(extra_size == 0) {
1474
1475 /* Create the kernel buffer that we will return.
1476 * It's at an offset to match the TYPE_POINT case... */
1477 buffer_size = request_len + IW_EV_POINT_OFF;
1478 buffer = kmalloc(buffer_size, GFP_KERNEL);
1479 if (buffer == NULL) {
1480 return -ENOMEM;
1481 }
1482 /* Copy event data */
1483 memcpy(buffer + IW_EV_POINT_OFF, request, request_len);
1484 /* Use our own copy of wrqu */
1485 wrqu = (union iwreq_data *) (buffer + IW_EV_POINT_OFF
1486 + IW_EV_LCP_LEN);
1487
1488 /* No extra arguments. Trivial to handle */
1489 ret = handler(dev, &info, wrqu, (char *) wrqu);
1490
1491 } else {
1492 char * extra;
1493
1494 /* Buffer for full reply */
1495 buffer_size = extra_size + IW_EV_POINT_LEN + IW_EV_POINT_OFF;
1496
1497#ifdef WE_RTNETLINK_DEBUG
1498 printk(KERN_DEBUG "%s (WE.r) : Malloc %d bytes (%d bytes)\n",
1499 dev->name, extra_size, buffer_size);
1500#endif /* WE_RTNETLINK_DEBUG */
1501
1502 /* Create the kernel buffer that we will return */
1503 buffer = kmalloc(buffer_size, GFP_KERNEL);
1504 if (buffer == NULL) {
1505 return -ENOMEM;
1506 }
1507
1508 /* Put wrqu in the right place (just before extra).
1509 * Leave space for IWE header and dummy pointer...
1510 * Note that IW_EV_LCP_LEN==4 bytes, so it's still aligned...
1511 */
1512 memcpy(buffer + IW_EV_LCP_LEN + IW_EV_POINT_OFF,
1513 ((char *) request) + IW_EV_LCP_LEN,
1514 IW_EV_POINT_LEN - IW_EV_LCP_LEN);
1515 wrqu = (union iwreq_data *) (buffer + IW_EV_LCP_LEN);
1516
1517 /* Extra comes logically after that. Offset +12 bytes. */
1518 extra = buffer + IW_EV_POINT_OFF + IW_EV_POINT_LEN;
1519
1520 /* Call the handler */
1521 ret = handler(dev, &info, wrqu, extra);
1522
1523 /* Adjust for the actual length if it's variable,
1524 * avoid leaking kernel bits outside. */
1525 if (!(descr->get_args & IW_PRIV_SIZE_FIXED))
1526 extra_size = adjust_priv_size(descr->get_args, wrqu);
1527 /* Re-adjust reply size */
1528 request->len = extra_size + IW_EV_POINT_LEN;
1529
1530 /* Put the iwe header where it should, i.e. scrap the
1531 * dummy pointer. */
1532 memcpy(buffer + IW_EV_POINT_OFF, request, IW_EV_LCP_LEN);
1533
1534#ifdef WE_RTNETLINK_DEBUG
1535 printk(KERN_DEBUG "%s (WE.r) : Reply 0x%04X, hdr_len %d, tokens %d, extra_size %d, buffer_size %d\n", dev->name, cmd, hdr_len, wrqu->data.length, extra_size, buffer_size);
1536#endif /* WE_RTNETLINK_DEBUG */
1537 }
1538
1539 /* Return the buffer to the caller */
1540 if (!ret) {
1541 *p_buf = buffer;
1542 *p_len = request->len;
1543 } else {
1544 /* Cleanup */
1545 if(buffer)
1546 kfree(buffer);
1547 }
1548
1549 return ret;
1550}
1551
1552/* ---------------------------------------------------------------- */
1553/*
1554 * Wrapper to call a private Wireless Extension SET handler.
1555 * Same as above...
1556 * It's not as nice and slimline as the standard wrapper. The cause
1557 * is struct iw_priv_args, which was not really designed for the
1558 * job we are going here.
1559 *
1560 * IMPORTANT : This function prevent to set and get data on the same
1561 * IOCTL and enforce the SET/GET convention. Not doing it would be
1562 * far too hairy...
1563 * If you need to set and get data at the same time, please don't use
1564 * a iw_handler but process it in your ioctl handler (i.e. use the
1565 * old driver API).
1566 */
1567static inline int rtnetlink_private_set(struct net_device * dev,
1568 struct iw_event * request,
1569 int request_len,
1570 iw_handler handler)
1571{
1572 const struct iw_priv_args * descr = NULL;
1573 unsigned int cmd;
1574 union iwreq_data * wrqu;
1575 union iwreq_data wrqu_point;
1576 int hdr_len;
1577 char * extra = NULL;
1578 int extra_size = 0;
1579 int offset = 0; /* For sub-ioctls */
1580 struct iw_request_info info;
1581 int i;
1582 int ret = -EINVAL;
1583
1584 /* Get the description of the Request */
1585 cmd = request->cmd;
1586 for(i = 0; i < dev->wireless_handlers->num_private_args; i++)
1587 if(cmd == dev->wireless_handlers->private_args[i].cmd) {
1588 descr = &(dev->wireless_handlers->private_args[i]);
1589 break;
1590 }
1591 if(descr == NULL)
1592 return -EOPNOTSUPP;
1593
1594#ifdef WE_RTNETLINK_DEBUG
1595 printk(KERN_DEBUG "%s (WE.r) : Found private handler for 0x%04X\n",
1596 ifr->ifr_name, cmd);
1597 printk(KERN_DEBUG "%s (WE.r) : Name %s, set %X, get %X\n",
1598 dev->name, descr->name, descr->set_args, descr->get_args);
1599#endif /* WE_RTNETLINK_DEBUG */
1600
1601 /* Compute the size of the set arguments */
1602 /* Check for sub-ioctl handler */
1603 if(descr->name[0] == '\0')
1604 /* Reserve one int for sub-ioctl index */
1605 offset = sizeof(__u32);
1606
1607 /* Size of set arguments */
1608 extra_size = get_priv_size(descr->set_args);
1609
1610 /* Does it fits in wrqu ? */
1611 if((descr->set_args & IW_PRIV_SIZE_FIXED) &&
1612 (extra_size <= IFNAMSIZ)) {
1613 hdr_len = IW_EV_LCP_LEN + extra_size;
1614 extra_size = 0;
1615 } else {
1616 hdr_len = IW_EV_POINT_LEN;
1617 }
1618
1619 /* Extract fixed header from request. This is properly aligned. */
1620 wrqu = &request->u;
1621
1622 /* Check if wrqu is complete */
1623 if(request_len < hdr_len) {
1624#ifdef WE_RTNETLINK_DEBUG
1625 printk(KERN_DEBUG
1626 "%s (WE.r) : Wireless request too short (%d)\n",
1627 dev->name, request_len);
1628#endif /* WE_RTNETLINK_DEBUG */
1629 return -EINVAL;
1630 }
1631
1632 /* Prepare the call */
1633 info.cmd = cmd;
1634 info.flags = 0;
1635
1636 /* Check if we have a pointer to user space data or not. */
1637 if(extra_size == 0) {
1638
1639 /* No extra arguments. Trivial to handle */
1640 ret = handler(dev, &info, wrqu, (char *) wrqu);
1641
1642 } else {
1643 int extra_len;
1644
1645 /* Put wrqu in the right place (skip pointer) */
1646 memcpy(((char *) &wrqu_point) + IW_EV_POINT_OFF,
1647 wrqu, IW_EV_POINT_LEN - IW_EV_LCP_LEN);
1648
1649 /* Does it fits within bounds ? */
1650 if(wrqu_point.data.length > (descr->set_args &
1651 IW_PRIV_SIZE_MASK))
1652 return -E2BIG;
1653
1654 /* Real length of payload */
1655 extra_len = adjust_priv_size(descr->set_args, &wrqu_point);
1656
1657 /* Check if request is self consistent */
1658 if((request_len - hdr_len) < extra_len) {
1659#ifdef WE_RTNETLINK_DEBUG
1660 printk(KERN_DEBUG "%s (WE.r) : Wireless request data too short (%d)\n",
1661 dev->name, extra_size);
1662#endif /* WE_RTNETLINK_DEBUG */
1663 return -EINVAL;
1664 }
1665
1666#ifdef WE_RTNETLINK_DEBUG
1667 printk(KERN_DEBUG "%s (WE.r) : Malloc %d bytes\n",
1668 dev->name, extra_size);
1669#endif /* WE_RTNETLINK_DEBUG */
1670
1671 /* Always allocate for max space. Easier, and won't last
1672 * long... */
1673 extra = kmalloc(extra_size, GFP_KERNEL);
1674 if (extra == NULL)
1675 return -ENOMEM;
1676
1677 /* Copy extra in aligned buffer */
1678 memcpy(extra, ((char *) request) + hdr_len, extra_len);
1679
1680 /* Call the handler */
1681 ret = handler(dev, &info, &wrqu_point, extra);
1682
1683 /* Cleanup - I told you it wasn't that long ;-) */
1684 kfree(extra);
1685 }
1686
1687 /* Call commit handler if needed and defined */
1688 if(ret == -EIWCOMMIT)
1689 ret = call_commit_handler(dev);
1690
1691 return ret;
1692}
1693
1694/* ---------------------------------------------------------------- */
1695/*
1696 * Main RtNetlink dispatcher. Called from the main networking code
1697 * (do_getlink() in net/core/rtnetlink.c).
1698 * Check the type of Request and call the appropriate wrapper...
1699 */
1700int wireless_rtnetlink_get(struct net_device * dev,
1701 char * data,
1702 int len,
1703 char ** p_buf,
1704 int * p_len)
1705{
1706 struct iw_event * request = (struct iw_event *) data;
1707 iw_handler handler;
1708
1709 /* Check length */
1710 if(len < IW_EV_LCP_LEN) {
1711 printk(KERN_DEBUG "%s (WE.r) : RtNetlink request too short (%d)\n",
1712 dev->name, len);
1713 return -EINVAL;
1714 }
1715
1716 /* ReCheck length (len may have padding) */
1717 if(request->len > len) {
1718 printk(KERN_DEBUG "%s (WE.r) : RtNetlink request len invalid (%d-%d)\n",
1719 dev->name, request->len, len);
1720 return -EINVAL;
1721 }
1722
1723 /* Only accept GET requests in here */
1724 if(!IW_IS_GET(request->cmd))
1725 return -EOPNOTSUPP;
1726
Jean Tourrilhes848ef852006-04-14 10:47:26 -07001727 /* If command is `get the encoding parameters', check if
1728 * the user has the right to do it */
1729 if (request->cmd == SIOCGIWENCODE ||
1730 request->cmd == SIOCGIWENCODEEXT) {
1731 if (!capable(CAP_NET_ADMIN))
1732 return -EPERM;
1733 }
1734
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001735 /* Special cases */
1736 if(request->cmd == SIOCGIWSTATS)
1737 /* Get Wireless Stats */
1738 return rtnetlink_standard_get(dev,
1739 request,
1740 request->len,
1741 &iw_handler_get_iwstats,
1742 p_buf, p_len);
1743 if(request->cmd == SIOCGIWPRIV) {
1744 /* Check if we have some wireless handlers defined */
1745 if(dev->wireless_handlers == NULL)
1746 return -EOPNOTSUPP;
1747 /* Get Wireless Stats */
1748 return rtnetlink_standard_get(dev,
1749 request,
1750 request->len,
1751 &iw_handler_get_private,
1752 p_buf, p_len);
1753 }
1754
1755 /* Basic check */
1756 if (!netif_device_present(dev))
1757 return -ENODEV;
1758
1759 /* Try to find the handler */
1760 handler = get_handler(dev, request->cmd);
1761 if(handler != NULL) {
1762 /* Standard and private are not the same */
1763 if(request->cmd < SIOCIWFIRSTPRIV)
1764 return rtnetlink_standard_get(dev,
1765 request,
1766 request->len,
1767 handler,
1768 p_buf, p_len);
1769 else
1770 return rtnetlink_private_get(dev,
1771 request,
1772 request->len,
1773 handler,
1774 p_buf, p_len);
1775 }
1776
1777 return -EOPNOTSUPP;
1778}
1779
1780/* ---------------------------------------------------------------- */
1781/*
1782 * Main RtNetlink dispatcher. Called from the main networking code
1783 * (do_setlink() in net/core/rtnetlink.c).
1784 * Check the type of Request and call the appropriate wrapper...
1785 */
1786int wireless_rtnetlink_set(struct net_device * dev,
1787 char * data,
1788 int len)
1789{
1790 struct iw_event * request = (struct iw_event *) data;
1791 iw_handler handler;
1792
1793 /* Check length */
1794 if(len < IW_EV_LCP_LEN) {
1795 printk(KERN_DEBUG "%s (WE.r) : RtNetlink request too short (%d)\n",
1796 dev->name, len);
1797 return -EINVAL;
1798 }
1799
1800 /* ReCheck length (len may have padding) */
1801 if(request->len > len) {
1802 printk(KERN_DEBUG "%s (WE.r) : RtNetlink request len invalid (%d-%d)\n",
1803 dev->name, request->len, len);
1804 return -EINVAL;
1805 }
1806
1807 /* Only accept SET requests in here */
1808 if(!IW_IS_SET(request->cmd))
1809 return -EOPNOTSUPP;
1810
1811 /* Basic check */
1812 if (!netif_device_present(dev))
1813 return -ENODEV;
1814
1815 /* New driver API : try to find the handler */
1816 handler = get_handler(dev, request->cmd);
1817 if(handler != NULL) {
1818 /* Standard and private are not the same */
1819 if(request->cmd < SIOCIWFIRSTPRIV)
1820 return rtnetlink_standard_set(dev,
1821 request,
1822 request->len,
1823 handler);
1824 else
1825 return rtnetlink_private_set(dev,
1826 request,
1827 request->len,
1828 handler);
1829 }
1830
1831 return -EOPNOTSUPP;
1832}
1833#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
1834
1835
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836/************************* EVENT PROCESSING *************************/
1837/*
1838 * Process events generated by the wireless layer or the driver.
1839 * Most often, the event will be propagated through rtnetlink
1840 */
1841
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001842#ifdef WE_EVENT_RTNETLINK
John W. Linvillebaef1862006-09-08 16:04:05 -04001843/* ---------------------------------------------------------------- */
1844/*
1845 * Locking...
1846 * ----------
1847 *
1848 * Thanks to Herbert Xu <herbert@gondor.apana.org.au> for fixing
1849 * the locking issue in here and implementing this code !
1850 *
1851 * The issue : wireless_send_event() is often called in interrupt context,
1852 * while the Netlink layer can never be called in interrupt context.
1853 * The fully formed RtNetlink events are queued, and then a tasklet is run
1854 * to feed those to Netlink.
1855 * The skb_queue is interrupt safe, and its lock is not held while calling
1856 * Netlink, so there is no possibility of dealock.
1857 * Jean II
1858 */
1859
Herbert Xu782a6672006-08-03 23:54:41 +10001860static struct sk_buff_head wireless_nlevent_queue;
1861
John W. Linvillebaef1862006-09-08 16:04:05 -04001862static int __init wireless_nlevent_init(void)
1863{
1864 skb_queue_head_init(&wireless_nlevent_queue);
1865 return 0;
1866}
1867
1868subsys_initcall(wireless_nlevent_init);
1869
Herbert Xu782a6672006-08-03 23:54:41 +10001870static void wireless_nlevent_process(unsigned long data)
1871{
1872 struct sk_buff *skb;
1873
1874 while ((skb = skb_dequeue(&wireless_nlevent_queue)))
Thomas Grafbd5785b2006-08-15 00:36:49 -07001875 rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
Herbert Xu782a6672006-08-03 23:54:41 +10001876}
1877
1878static DECLARE_TASKLET(wireless_nlevent_tasklet, wireless_nlevent_process, 0);
1879
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880/* ---------------------------------------------------------------- */
1881/*
1882 * Fill a rtnetlink message with our event data.
1883 * Note that we propage only the specified event and don't dump the
1884 * current wireless config. Dumping the wireless config is far too
1885 * expensive (for each parameter, the driver need to query the hardware).
1886 */
1887static inline int rtnetlink_fill_iwinfo(struct sk_buff * skb,
1888 struct net_device * dev,
1889 int type,
1890 char * event,
1891 int event_len)
1892{
1893 struct ifinfomsg *r;
1894 struct nlmsghdr *nlh;
1895 unsigned char *b = skb->tail;
1896
1897 nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(*r));
1898 r = NLMSG_DATA(nlh);
1899 r->ifi_family = AF_UNSPEC;
Patrick McHardy9ef1d4c2005-06-28 12:55:30 -07001900 r->__ifi_pad = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 r->ifi_type = dev->type;
1902 r->ifi_index = dev->ifindex;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001903 r->ifi_flags = dev_get_flags(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 r->ifi_change = 0; /* Wireless changes don't affect those flags */
1905
1906 /* Add the wireless events in the netlink packet */
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001907 RTA_PUT(skb, IFLA_WIRELESS, event_len, event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908
1909 nlh->nlmsg_len = skb->tail - b;
1910 return skb->len;
1911
1912nlmsg_failure:
1913rtattr_failure:
1914 skb_trim(skb, b - skb->data);
1915 return -1;
1916}
1917
1918/* ---------------------------------------------------------------- */
1919/*
1920 * Create and broadcast and send it on the standard rtnetlink socket
1921 * This is a pure clone rtmsg_ifinfo() in net/core/rtnetlink.c
1922 * Andrzej Krzysztofowicz mandated that I used a IFLA_XXX field
1923 * within a RTM_NEWLINK event.
1924 */
1925static inline void rtmsg_iwinfo(struct net_device * dev,
1926 char * event,
1927 int event_len)
1928{
1929 struct sk_buff *skb;
1930 int size = NLMSG_GOODSIZE;
1931
1932 skb = alloc_skb(size, GFP_ATOMIC);
1933 if (!skb)
1934 return;
1935
1936 if (rtnetlink_fill_iwinfo(skb, dev, RTM_NEWLINK,
1937 event, event_len) < 0) {
1938 kfree_skb(skb);
1939 return;
1940 }
Patrick McHardyac6d4392005-08-14 19:29:52 -07001941 NETLINK_CB(skb).dst_group = RTNLGRP_LINK;
Herbert Xu782a6672006-08-03 23:54:41 +10001942 skb_queue_tail(&wireless_nlevent_queue, skb);
1943 tasklet_schedule(&wireless_nlevent_tasklet);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944}
Herbert Xu782a6672006-08-03 23:54:41 +10001945
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001946#endif /* WE_EVENT_RTNETLINK */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947
1948/* ---------------------------------------------------------------- */
1949/*
1950 * Main event dispatcher. Called from other parts and drivers.
1951 * Send the event on the appropriate channels.
1952 * May be called from interrupt context.
1953 */
1954void wireless_send_event(struct net_device * dev,
1955 unsigned int cmd,
1956 union iwreq_data * wrqu,
1957 char * extra)
1958{
1959 const struct iw_ioctl_description * descr = NULL;
1960 int extra_len = 0;
1961 struct iw_event *event; /* Mallocated whole event */
1962 int event_len; /* Its size */
1963 int hdr_len; /* Size of the event header */
Jean Tourrilhes6582c162005-09-02 11:32:28 -07001964 int wrqu_off = 0; /* Offset in wrqu */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 /* Don't "optimise" the following variable, it will crash */
1966 unsigned cmd_index; /* *MUST* be unsigned */
1967
Jean Tourrilhes6582c162005-09-02 11:32:28 -07001968 /* Get the description of the Event */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 if(cmd <= SIOCIWLAST) {
1970 cmd_index = cmd - SIOCIWFIRST;
1971 if(cmd_index < standard_ioctl_num)
1972 descr = &(standard_ioctl[cmd_index]);
1973 } else {
1974 cmd_index = cmd - IWEVFIRST;
1975 if(cmd_index < standard_event_num)
1976 descr = &(standard_event[cmd_index]);
1977 }
1978 /* Don't accept unknown events */
1979 if(descr == NULL) {
1980 /* Note : we don't return an error to the driver, because
1981 * the driver would not know what to do about it. It can't
1982 * return an error to the user, because the event is not
1983 * initiated by a user request.
1984 * The best the driver could do is to log an error message.
1985 * We will do it ourselves instead...
1986 */
1987 printk(KERN_ERR "%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n",
1988 dev->name, cmd);
1989 return;
1990 }
1991#ifdef WE_EVENT_DEBUG
1992 printk(KERN_DEBUG "%s (WE) : Got event 0x%04X\n",
1993 dev->name, cmd);
1994 printk(KERN_DEBUG "%s (WE) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
1995#endif /* WE_EVENT_DEBUG */
1996
1997 /* Check extra parameters and set extra_len */
1998 if(descr->header_type == IW_HEADER_TYPE_POINT) {
1999 /* Check if number of token fits within bounds */
2000 if(wrqu->data.length > descr->max_tokens) {
2001 printk(KERN_ERR "%s (WE) : Wireless Event too big (%d)\n", dev->name, wrqu->data.length);
2002 return;
2003 }
2004 if(wrqu->data.length < descr->min_tokens) {
2005 printk(KERN_ERR "%s (WE) : Wireless Event too small (%d)\n", dev->name, wrqu->data.length);
2006 return;
2007 }
2008 /* Calculate extra_len - extra is NULL for restricted events */
2009 if(extra != NULL)
2010 extra_len = wrqu->data.length * descr->token_size;
Jean Tourrilhes6582c162005-09-02 11:32:28 -07002011 /* Always at an offset in wrqu */
2012 wrqu_off = IW_EV_POINT_OFF;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013#ifdef WE_EVENT_DEBUG
2014 printk(KERN_DEBUG "%s (WE) : Event 0x%04X, tokens %d, extra_len %d\n", dev->name, cmd, wrqu->data.length, extra_len);
2015#endif /* WE_EVENT_DEBUG */
2016 }
2017
2018 /* Total length of the event */
2019 hdr_len = event_type_size[descr->header_type];
2020 event_len = hdr_len + extra_len;
2021
2022#ifdef WE_EVENT_DEBUG
Jean Tourrilhes6582c162005-09-02 11:32:28 -07002023 printk(KERN_DEBUG "%s (WE) : Event 0x%04X, hdr_len %d, wrqu_off %d, event_len %d\n", dev->name, cmd, hdr_len, wrqu_off, event_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024#endif /* WE_EVENT_DEBUG */
2025
2026 /* Create temporary buffer to hold the event */
2027 event = kmalloc(event_len, GFP_ATOMIC);
2028 if(event == NULL)
2029 return;
2030
2031 /* Fill event */
2032 event->len = event_len;
2033 event->cmd = cmd;
Jean Tourrilhes6582c162005-09-02 11:32:28 -07002034 memcpy(&event->u, ((char *) wrqu) + wrqu_off, hdr_len - IW_EV_LCP_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035 if(extra != NULL)
2036 memcpy(((char *) event) + hdr_len, extra, extra_len);
2037
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08002038#ifdef WE_EVENT_RTNETLINK
2039 /* Send via the RtNetlink event channel */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040 rtmsg_iwinfo(dev, (char *) event, event_len);
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08002041#endif /* WE_EVENT_RTNETLINK */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042
2043 /* Cleanup */
2044 kfree(event);
2045
2046 return; /* Always success, I guess ;-) */
2047}
2048
2049/********************** ENHANCED IWSPY SUPPORT **********************/
2050/*
2051 * In the old days, the driver was handling spy support all by itself.
2052 * Now, the driver can delegate this task to Wireless Extensions.
2053 * It needs to use those standard spy iw_handler in struct iw_handler_def,
2054 * push data to us via wireless_spy_update() and include struct iw_spy_data
Jean Tourrilhes6582c162005-09-02 11:32:28 -07002055 * in its private part (and export it in net_device->wireless_data->spy_data).
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 * One of the main advantage of centralising spy support here is that
2057 * it becomes much easier to improve and extend it without having to touch
2058 * the drivers. One example is the addition of the Spy-Threshold events.
2059 */
2060
2061/* ---------------------------------------------------------------- */
2062/*
2063 * Return the pointer to the spy data in the driver.
2064 * Because this is called on the Rx path via wireless_spy_update(),
2065 * we want it to be efficient...
2066 */
2067static inline struct iw_spy_data * get_spydata(struct net_device *dev)
2068{
2069 /* This is the new way */
2070 if(dev->wireless_data)
2071 return(dev->wireless_data->spy_data);
Jean Tourrilhes6582c162005-09-02 11:32:28 -07002072 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073}
2074
2075/*------------------------------------------------------------------*/
2076/*
2077 * Standard Wireless Handler : set Spy List
2078 */
2079int iw_handler_set_spy(struct net_device * dev,
2080 struct iw_request_info * info,
2081 union iwreq_data * wrqu,
2082 char * extra)
2083{
2084 struct iw_spy_data * spydata = get_spydata(dev);
2085 struct sockaddr * address = (struct sockaddr *) extra;
2086
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087 /* Make sure driver is not buggy or using the old API */
2088 if(!spydata)
2089 return -EOPNOTSUPP;
2090
2091 /* Disable spy collection while we copy the addresses.
2092 * While we copy addresses, any call to wireless_spy_update()
2093 * will NOP. This is OK, as anyway the addresses are changing. */
2094 spydata->spy_number = 0;
2095
2096 /* We want to operate without locking, because wireless_spy_update()
2097 * most likely will happen in the interrupt handler, and therefore
2098 * have its own locking constraints and needs performance.
2099 * The rtnl_lock() make sure we don't race with the other iw_handlers.
2100 * This make sure wireless_spy_update() "see" that the spy list
2101 * is temporarily disabled. */
2102 wmb();
2103
2104 /* Are there are addresses to copy? */
2105 if(wrqu->data.length > 0) {
2106 int i;
2107
2108 /* Copy addresses */
2109 for(i = 0; i < wrqu->data.length; i++)
2110 memcpy(spydata->spy_address[i], address[i].sa_data,
2111 ETH_ALEN);
2112 /* Reset stats */
2113 memset(spydata->spy_stat, 0,
2114 sizeof(struct iw_quality) * IW_MAX_SPY);
2115
2116#ifdef WE_SPY_DEBUG
Jean Tourrilhes6582c162005-09-02 11:32:28 -07002117 printk(KERN_DEBUG "iw_handler_set_spy() : wireless_data %p, spydata %p, num %d\n", dev->wireless_data, spydata, wrqu->data.length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118 for (i = 0; i < wrqu->data.length; i++)
2119 printk(KERN_DEBUG
2120 "%02X:%02X:%02X:%02X:%02X:%02X \n",
2121 spydata->spy_address[i][0],
2122 spydata->spy_address[i][1],
2123 spydata->spy_address[i][2],
2124 spydata->spy_address[i][3],
2125 spydata->spy_address[i][4],
2126 spydata->spy_address[i][5]);
2127#endif /* WE_SPY_DEBUG */
2128 }
2129
2130 /* Make sure above is updated before re-enabling */
2131 wmb();
2132
2133 /* Enable addresses */
2134 spydata->spy_number = wrqu->data.length;
2135
2136 return 0;
2137}
2138
2139/*------------------------------------------------------------------*/
2140/*
2141 * Standard Wireless Handler : get Spy List
2142 */
2143int iw_handler_get_spy(struct net_device * dev,
2144 struct iw_request_info * info,
2145 union iwreq_data * wrqu,
2146 char * extra)
2147{
2148 struct iw_spy_data * spydata = get_spydata(dev);
2149 struct sockaddr * address = (struct sockaddr *) extra;
2150 int i;
2151
2152 /* Make sure driver is not buggy or using the old API */
2153 if(!spydata)
2154 return -EOPNOTSUPP;
2155
2156 wrqu->data.length = spydata->spy_number;
2157
2158 /* Copy addresses. */
2159 for(i = 0; i < spydata->spy_number; i++) {
2160 memcpy(address[i].sa_data, spydata->spy_address[i], ETH_ALEN);
2161 address[i].sa_family = AF_UNIX;
2162 }
2163 /* Copy stats to the user buffer (just after). */
2164 if(spydata->spy_number > 0)
2165 memcpy(extra + (sizeof(struct sockaddr) *spydata->spy_number),
2166 spydata->spy_stat,
2167 sizeof(struct iw_quality) * spydata->spy_number);
2168 /* Reset updated flags. */
2169 for(i = 0; i < spydata->spy_number; i++)
Jean Tourrilhes6582c162005-09-02 11:32:28 -07002170 spydata->spy_stat[i].updated &= ~IW_QUAL_ALL_UPDATED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171 return 0;
2172}
2173
2174/*------------------------------------------------------------------*/
2175/*
2176 * Standard Wireless Handler : set spy threshold
2177 */
2178int iw_handler_set_thrspy(struct net_device * dev,
2179 struct iw_request_info *info,
2180 union iwreq_data * wrqu,
2181 char * extra)
2182{
2183 struct iw_spy_data * spydata = get_spydata(dev);
2184 struct iw_thrspy * threshold = (struct iw_thrspy *) extra;
2185
2186 /* Make sure driver is not buggy or using the old API */
2187 if(!spydata)
2188 return -EOPNOTSUPP;
2189
2190 /* Just do it */
2191 memcpy(&(spydata->spy_thr_low), &(threshold->low),
2192 2 * sizeof(struct iw_quality));
2193
2194 /* Clear flag */
2195 memset(spydata->spy_thr_under, '\0', sizeof(spydata->spy_thr_under));
2196
2197#ifdef WE_SPY_DEBUG
2198 printk(KERN_DEBUG "iw_handler_set_thrspy() : low %d ; high %d\n", spydata->spy_thr_low.level, spydata->spy_thr_high.level);
2199#endif /* WE_SPY_DEBUG */
2200
2201 return 0;
2202}
2203
2204/*------------------------------------------------------------------*/
2205/*
2206 * Standard Wireless Handler : get spy threshold
2207 */
2208int iw_handler_get_thrspy(struct net_device * dev,
2209 struct iw_request_info *info,
2210 union iwreq_data * wrqu,
2211 char * extra)
2212{
2213 struct iw_spy_data * spydata = get_spydata(dev);
2214 struct iw_thrspy * threshold = (struct iw_thrspy *) extra;
2215
2216 /* Make sure driver is not buggy or using the old API */
2217 if(!spydata)
2218 return -EOPNOTSUPP;
2219
2220 /* Just do it */
2221 memcpy(&(threshold->low), &(spydata->spy_thr_low),
2222 2 * sizeof(struct iw_quality));
2223
2224 return 0;
2225}
2226
2227/*------------------------------------------------------------------*/
2228/*
2229 * Prepare and send a Spy Threshold event
2230 */
2231static void iw_send_thrspy_event(struct net_device * dev,
2232 struct iw_spy_data * spydata,
2233 unsigned char * address,
2234 struct iw_quality * wstats)
2235{
2236 union iwreq_data wrqu;
2237 struct iw_thrspy threshold;
2238
2239 /* Init */
2240 wrqu.data.length = 1;
2241 wrqu.data.flags = 0;
2242 /* Copy address */
2243 memcpy(threshold.addr.sa_data, address, ETH_ALEN);
2244 threshold.addr.sa_family = ARPHRD_ETHER;
2245 /* Copy stats */
2246 memcpy(&(threshold.qual), wstats, sizeof(struct iw_quality));
2247 /* Copy also thresholds */
2248 memcpy(&(threshold.low), &(spydata->spy_thr_low),
2249 2 * sizeof(struct iw_quality));
2250
2251#ifdef WE_SPY_DEBUG
2252 printk(KERN_DEBUG "iw_send_thrspy_event() : address %02X:%02X:%02X:%02X:%02X:%02X, level %d, up = %d\n",
2253 threshold.addr.sa_data[0],
2254 threshold.addr.sa_data[1],
2255 threshold.addr.sa_data[2],
2256 threshold.addr.sa_data[3],
2257 threshold.addr.sa_data[4],
2258 threshold.addr.sa_data[5], threshold.qual.level);
2259#endif /* WE_SPY_DEBUG */
2260
2261 /* Send event to user space */
2262 wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
2263}
2264
2265/* ---------------------------------------------------------------- */
2266/*
2267 * Call for the driver to update the spy data.
2268 * For now, the spy data is a simple array. As the size of the array is
2269 * small, this is good enough. If we wanted to support larger number of
2270 * spy addresses, we should use something more efficient...
2271 */
2272void wireless_spy_update(struct net_device * dev,
2273 unsigned char * address,
2274 struct iw_quality * wstats)
2275{
2276 struct iw_spy_data * spydata = get_spydata(dev);
2277 int i;
2278 int match = -1;
2279
2280 /* Make sure driver is not buggy or using the old API */
2281 if(!spydata)
2282 return;
2283
2284#ifdef WE_SPY_DEBUG
Jean Tourrilhes6582c162005-09-02 11:32:28 -07002285 printk(KERN_DEBUG "wireless_spy_update() : wireless_data %p, spydata %p, address %02X:%02X:%02X:%02X:%02X:%02X\n", dev->wireless_data, spydata, address[0], address[1], address[2], address[3], address[4], address[5]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286#endif /* WE_SPY_DEBUG */
2287
2288 /* Update all records that match */
2289 for(i = 0; i < spydata->spy_number; i++)
Kris Katterjohnd3f4a682006-01-09 16:01:43 -08002290 if(!compare_ether_addr(address, spydata->spy_address[i])) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291 memcpy(&(spydata->spy_stat[i]), wstats,
2292 sizeof(struct iw_quality));
2293 match = i;
2294 }
2295
2296 /* Generate an event if we cross the spy threshold.
2297 * To avoid event storms, we have a simple hysteresis : we generate
2298 * event only when we go under the low threshold or above the
2299 * high threshold. */
2300 if(match >= 0) {
2301 if(spydata->spy_thr_under[match]) {
2302 if(wstats->level > spydata->spy_thr_high.level) {
2303 spydata->spy_thr_under[match] = 0;
2304 iw_send_thrspy_event(dev, spydata,
2305 address, wstats);
2306 }
2307 } else {
2308 if(wstats->level < spydata->spy_thr_low.level) {
2309 spydata->spy_thr_under[match] = 1;
2310 iw_send_thrspy_event(dev, spydata,
2311 address, wstats);
2312 }
2313 }
2314 }
2315}
2316
2317EXPORT_SYMBOL(iw_handler_get_spy);
2318EXPORT_SYMBOL(iw_handler_get_thrspy);
2319EXPORT_SYMBOL(iw_handler_set_spy);
2320EXPORT_SYMBOL(iw_handler_set_thrspy);
2321EXPORT_SYMBOL(wireless_send_event);
2322EXPORT_SYMBOL(wireless_spy_update);