2 * This file implement the Wireless Extensions APIs.
4 * Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
5 * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
7 * (As all part of the Linux kernel, this file is GPL)
10 /************************** DOCUMENTATION **************************/
14 * See <linux/wireless.h> for details of the APIs and the rest.
19 * v1 - 5.12.01 - Jean II
20 * o Created this file.
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
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
36 * v4 - 18.04.02 - Jean II
37 * o Fix stupid off by one in iw_ioctl_description : IW_ESSID_MAX_SIZE + 1
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)
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
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
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)
69 * v8 - 17.02.06 - Jean II
70 * o RtNetlink requests support (SET/GET)
72 * v8b - 03.08.06 - Herbert Xu
73 * o Fix Wireless Event locking issues.
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()
80 * v10 - 16.3.07 - Jean II
81 * o Prevent leaking of kernel space in stream on 64 bits.
84 /***************************** INCLUDES *****************************/
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 */
94 #include <linux/etherdevice.h> /* compare_ether_addr */
95 #include <linux/interrupt.h>
96 #include <net/net_namespace.h>
98 #include <linux/wireless.h> /* Pretty obvious */
99 #include <net/iw_handler.h> /* New driver API */
100 #include <net/netlink.h>
101 #include <net/wext.h>
103 #include <asm/uaccess.h> /* copy_to_user() */
105 /************************* GLOBAL VARIABLES *************************/
107 * You should not use global variables, because of re-entrancy.
108 * On our case, it's only const, so it's OK...
111 * Meta-data about all the standard Wireless Extension request we
114 static const struct iw_ioctl_description standard_ioctl
[] = {
115 [SIOCSIWCOMMIT
- SIOCIWFIRST
] = {
116 .header_type
= IW_HEADER_TYPE_NULL
,
118 [SIOCGIWNAME
- SIOCIWFIRST
] = {
119 .header_type
= IW_HEADER_TYPE_CHAR
,
120 .flags
= IW_DESCR_FLAG_DUMP
,
122 [SIOCSIWNWID
- SIOCIWFIRST
] = {
123 .header_type
= IW_HEADER_TYPE_PARAM
,
124 .flags
= IW_DESCR_FLAG_EVENT
,
126 [SIOCGIWNWID
- SIOCIWFIRST
] = {
127 .header_type
= IW_HEADER_TYPE_PARAM
,
128 .flags
= IW_DESCR_FLAG_DUMP
,
130 [SIOCSIWFREQ
- SIOCIWFIRST
] = {
131 .header_type
= IW_HEADER_TYPE_FREQ
,
132 .flags
= IW_DESCR_FLAG_EVENT
,
134 [SIOCGIWFREQ
- SIOCIWFIRST
] = {
135 .header_type
= IW_HEADER_TYPE_FREQ
,
136 .flags
= IW_DESCR_FLAG_DUMP
,
138 [SIOCSIWMODE
- SIOCIWFIRST
] = {
139 .header_type
= IW_HEADER_TYPE_UINT
,
140 .flags
= IW_DESCR_FLAG_EVENT
,
142 [SIOCGIWMODE
- SIOCIWFIRST
] = {
143 .header_type
= IW_HEADER_TYPE_UINT
,
144 .flags
= IW_DESCR_FLAG_DUMP
,
146 [SIOCSIWSENS
- SIOCIWFIRST
] = {
147 .header_type
= IW_HEADER_TYPE_PARAM
,
149 [SIOCGIWSENS
- SIOCIWFIRST
] = {
150 .header_type
= IW_HEADER_TYPE_PARAM
,
152 [SIOCSIWRANGE
- SIOCIWFIRST
] = {
153 .header_type
= IW_HEADER_TYPE_NULL
,
155 [SIOCGIWRANGE
- SIOCIWFIRST
] = {
156 .header_type
= IW_HEADER_TYPE_POINT
,
158 .max_tokens
= sizeof(struct iw_range
),
159 .flags
= IW_DESCR_FLAG_DUMP
,
161 [SIOCSIWPRIV
- SIOCIWFIRST
] = {
162 .header_type
= IW_HEADER_TYPE_NULL
,
164 [SIOCGIWPRIV
- SIOCIWFIRST
] = { /* (handled directly by us) */
165 .header_type
= IW_HEADER_TYPE_POINT
,
166 .token_size
= sizeof(struct iw_priv_args
),
168 .flags
= IW_DESCR_FLAG_NOMAX
,
170 [SIOCSIWSTATS
- SIOCIWFIRST
] = {
171 .header_type
= IW_HEADER_TYPE_NULL
,
173 [SIOCGIWSTATS
- SIOCIWFIRST
] = { /* (handled directly by us) */
174 .header_type
= IW_HEADER_TYPE_POINT
,
176 .max_tokens
= sizeof(struct iw_statistics
),
177 .flags
= IW_DESCR_FLAG_DUMP
,
179 [SIOCSIWSPY
- SIOCIWFIRST
] = {
180 .header_type
= IW_HEADER_TYPE_POINT
,
181 .token_size
= sizeof(struct sockaddr
),
182 .max_tokens
= IW_MAX_SPY
,
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
,
190 [SIOCSIWTHRSPY
- SIOCIWFIRST
] = {
191 .header_type
= IW_HEADER_TYPE_POINT
,
192 .token_size
= sizeof(struct iw_thrspy
),
196 [SIOCGIWTHRSPY
- SIOCIWFIRST
] = {
197 .header_type
= IW_HEADER_TYPE_POINT
,
198 .token_size
= sizeof(struct iw_thrspy
),
202 [SIOCSIWAP
- SIOCIWFIRST
] = {
203 .header_type
= IW_HEADER_TYPE_ADDR
,
205 [SIOCGIWAP
- SIOCIWFIRST
] = {
206 .header_type
= IW_HEADER_TYPE_ADDR
,
207 .flags
= IW_DESCR_FLAG_DUMP
,
209 [SIOCSIWMLME
- SIOCIWFIRST
] = {
210 .header_type
= IW_HEADER_TYPE_POINT
,
212 .min_tokens
= sizeof(struct iw_mlme
),
213 .max_tokens
= sizeof(struct iw_mlme
),
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
,
222 [SIOCSIWSCAN
- SIOCIWFIRST
] = {
223 .header_type
= IW_HEADER_TYPE_POINT
,
226 .max_tokens
= sizeof(struct iw_scan_req
),
228 [SIOCGIWSCAN
- SIOCIWFIRST
] = {
229 .header_type
= IW_HEADER_TYPE_POINT
,
231 .max_tokens
= IW_SCAN_MAX_DATA
,
232 .flags
= IW_DESCR_FLAG_NOMAX
,
234 [SIOCSIWESSID
- SIOCIWFIRST
] = {
235 .header_type
= IW_HEADER_TYPE_POINT
,
237 .max_tokens
= IW_ESSID_MAX_SIZE
,
238 .flags
= IW_DESCR_FLAG_EVENT
,
240 [SIOCGIWESSID
- SIOCIWFIRST
] = {
241 .header_type
= IW_HEADER_TYPE_POINT
,
243 .max_tokens
= IW_ESSID_MAX_SIZE
,
244 .flags
= IW_DESCR_FLAG_DUMP
,
246 [SIOCSIWNICKN
- SIOCIWFIRST
] = {
247 .header_type
= IW_HEADER_TYPE_POINT
,
249 .max_tokens
= IW_ESSID_MAX_SIZE
,
251 [SIOCGIWNICKN
- SIOCIWFIRST
] = {
252 .header_type
= IW_HEADER_TYPE_POINT
,
254 .max_tokens
= IW_ESSID_MAX_SIZE
,
256 [SIOCSIWRATE
- SIOCIWFIRST
] = {
257 .header_type
= IW_HEADER_TYPE_PARAM
,
259 [SIOCGIWRATE
- SIOCIWFIRST
] = {
260 .header_type
= IW_HEADER_TYPE_PARAM
,
262 [SIOCSIWRTS
- SIOCIWFIRST
] = {
263 .header_type
= IW_HEADER_TYPE_PARAM
,
265 [SIOCGIWRTS
- SIOCIWFIRST
] = {
266 .header_type
= IW_HEADER_TYPE_PARAM
,
268 [SIOCSIWFRAG
- SIOCIWFIRST
] = {
269 .header_type
= IW_HEADER_TYPE_PARAM
,
271 [SIOCGIWFRAG
- SIOCIWFIRST
] = {
272 .header_type
= IW_HEADER_TYPE_PARAM
,
274 [SIOCSIWTXPOW
- SIOCIWFIRST
] = {
275 .header_type
= IW_HEADER_TYPE_PARAM
,
277 [SIOCGIWTXPOW
- SIOCIWFIRST
] = {
278 .header_type
= IW_HEADER_TYPE_PARAM
,
280 [SIOCSIWRETRY
- SIOCIWFIRST
] = {
281 .header_type
= IW_HEADER_TYPE_PARAM
,
283 [SIOCGIWRETRY
- SIOCIWFIRST
] = {
284 .header_type
= IW_HEADER_TYPE_PARAM
,
286 [SIOCSIWENCODE
- SIOCIWFIRST
] = {
287 .header_type
= IW_HEADER_TYPE_POINT
,
289 .max_tokens
= IW_ENCODING_TOKEN_MAX
,
290 .flags
= IW_DESCR_FLAG_EVENT
| IW_DESCR_FLAG_RESTRICT
,
292 [SIOCGIWENCODE
- SIOCIWFIRST
] = {
293 .header_type
= IW_HEADER_TYPE_POINT
,
295 .max_tokens
= IW_ENCODING_TOKEN_MAX
,
296 .flags
= IW_DESCR_FLAG_DUMP
| IW_DESCR_FLAG_RESTRICT
,
298 [SIOCSIWPOWER
- SIOCIWFIRST
] = {
299 .header_type
= IW_HEADER_TYPE_PARAM
,
301 [SIOCGIWPOWER
- SIOCIWFIRST
] = {
302 .header_type
= IW_HEADER_TYPE_PARAM
,
304 [SIOCSIWGENIE
- SIOCIWFIRST
] = {
305 .header_type
= IW_HEADER_TYPE_POINT
,
307 .max_tokens
= IW_GENERIC_IE_MAX
,
309 [SIOCGIWGENIE
- SIOCIWFIRST
] = {
310 .header_type
= IW_HEADER_TYPE_POINT
,
312 .max_tokens
= IW_GENERIC_IE_MAX
,
314 [SIOCSIWAUTH
- SIOCIWFIRST
] = {
315 .header_type
= IW_HEADER_TYPE_PARAM
,
317 [SIOCGIWAUTH
- SIOCIWFIRST
] = {
318 .header_type
= IW_HEADER_TYPE_PARAM
,
320 [SIOCSIWENCODEEXT
- SIOCIWFIRST
] = {
321 .header_type
= IW_HEADER_TYPE_POINT
,
323 .min_tokens
= sizeof(struct iw_encode_ext
),
324 .max_tokens
= sizeof(struct iw_encode_ext
) +
325 IW_ENCODING_TOKEN_MAX
,
327 [SIOCGIWENCODEEXT
- SIOCIWFIRST
] = {
328 .header_type
= IW_HEADER_TYPE_POINT
,
330 .min_tokens
= sizeof(struct iw_encode_ext
),
331 .max_tokens
= sizeof(struct iw_encode_ext
) +
332 IW_ENCODING_TOKEN_MAX
,
334 [SIOCSIWPMKSA
- SIOCIWFIRST
] = {
335 .header_type
= IW_HEADER_TYPE_POINT
,
337 .min_tokens
= sizeof(struct iw_pmksa
),
338 .max_tokens
= sizeof(struct iw_pmksa
),
341 static const unsigned standard_ioctl_num
= ARRAY_SIZE(standard_ioctl
);
344 * Meta-data about all the additional standard Wireless Extension events
347 static const struct iw_ioctl_description standard_event
[] = {
348 [IWEVTXDROP
- IWEVFIRST
] = {
349 .header_type
= IW_HEADER_TYPE_ADDR
,
351 [IWEVQUAL
- IWEVFIRST
] = {
352 .header_type
= IW_HEADER_TYPE_QUAL
,
354 [IWEVCUSTOM
- IWEVFIRST
] = {
355 .header_type
= IW_HEADER_TYPE_POINT
,
357 .max_tokens
= IW_CUSTOM_MAX
,
359 [IWEVREGISTERED
- IWEVFIRST
] = {
360 .header_type
= IW_HEADER_TYPE_ADDR
,
362 [IWEVEXPIRED
- IWEVFIRST
] = {
363 .header_type
= IW_HEADER_TYPE_ADDR
,
365 [IWEVGENIE
- IWEVFIRST
] = {
366 .header_type
= IW_HEADER_TYPE_POINT
,
368 .max_tokens
= IW_GENERIC_IE_MAX
,
370 [IWEVMICHAELMICFAILURE
- IWEVFIRST
] = {
371 .header_type
= IW_HEADER_TYPE_POINT
,
373 .max_tokens
= sizeof(struct iw_michaelmicfailure
),
375 [IWEVASSOCREQIE
- IWEVFIRST
] = {
376 .header_type
= IW_HEADER_TYPE_POINT
,
378 .max_tokens
= IW_GENERIC_IE_MAX
,
380 [IWEVASSOCRESPIE
- IWEVFIRST
] = {
381 .header_type
= IW_HEADER_TYPE_POINT
,
383 .max_tokens
= IW_GENERIC_IE_MAX
,
385 [IWEVPMKIDCAND
- IWEVFIRST
] = {
386 .header_type
= IW_HEADER_TYPE_POINT
,
388 .max_tokens
= sizeof(struct iw_pmkid_cand
),
391 static const unsigned standard_event_num
= ARRAY_SIZE(standard_event
);
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 */
399 sizeof(__u32
), /* IW_PRIV_TYPE_INT */
400 sizeof(struct iw_freq
), /* IW_PRIV_TYPE_FLOAT */
401 sizeof(struct sockaddr
), /* IW_PRIV_TYPE_ADDR */
405 /* Size (in bytes) of various events */
406 static const int event_type_size
[] = {
407 IW_EV_LCP_LEN
, /* IW_HEADER_TYPE_NULL */
409 IW_EV_CHAR_LEN
, /* IW_HEADER_TYPE_CHAR */
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 */
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 */
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 */
424 IW_EV_CHAR_PK_LEN
, /* IW_HEADER_TYPE_CHAR */
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 */
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 */
435 /************************ COMMON SUBROUTINES ************************/
437 * Stuff that may be used in various place or doesn't fit in one
438 * of the section below.
441 /* ---------------------------------------------------------------- */
443 * Return the driver handler associated with a specific Wireless Extension.
445 static iw_handler
get_handler(struct net_device
*dev
, unsigned int cmd
)
447 /* Don't "optimise" the following variable, it will crash */
448 unsigned int index
; /* *MUST* be unsigned */
450 /* Check if we have some wireless handlers defined */
451 if (dev
->wireless_handlers
== NULL
)
454 /* Try as a standard command */
455 index
= cmd
- SIOCIWFIRST
;
456 if (index
< dev
->wireless_handlers
->num_standard
)
457 return dev
->wireless_handlers
->standard
[index
];
459 /* Try as a private command */
460 index
= cmd
- SIOCIWFIRSTPRIV
;
461 if (index
< dev
->wireless_handlers
->num_private
)
462 return dev
->wireless_handlers
->private[index
];
468 /* ---------------------------------------------------------------- */
470 * Get statistics out of the driver
472 static struct iw_statistics
*get_wireless_stats(struct net_device
*dev
)
475 if ((dev
->wireless_handlers
!= NULL
) &&
476 (dev
->wireless_handlers
->get_wireless_stats
!= NULL
))
477 return dev
->wireless_handlers
->get_wireless_stats(dev
);
483 /* ---------------------------------------------------------------- */
485 * Call the commit handler in the driver
486 * (if exist and if conditions are right)
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.
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()" ;-)
502 static int call_commit_handler(struct net_device
*dev
)
504 if ((netif_running(dev
)) &&
505 (dev
->wireless_handlers
->standard
[0] != NULL
))
506 /* Call the commit handler on the driver */
507 return dev
->wireless_handlers
->standard
[0](dev
, NULL
,
510 return 0; /* Command completed successfully */
513 /* ---------------------------------------------------------------- */
515 * Calculate size of private arguments
517 static inline int get_priv_size(__u16 args
)
519 int num
= args
& IW_PRIV_SIZE_MASK
;
520 int type
= (args
& IW_PRIV_TYPE_MASK
) >> 12;
522 return num
* iw_priv_type_size
[type
];
525 /* ---------------------------------------------------------------- */
527 * Re-calculate the size of private arguments
529 static inline int adjust_priv_size(__u16 args
,
530 union iwreq_data
* wrqu
)
532 int num
= wrqu
->data
.length
;
533 int max
= args
& IW_PRIV_SIZE_MASK
;
534 int type
= (args
& IW_PRIV_TYPE_MASK
) >> 12;
536 /* Make sure the driver doesn't goof up */
540 return num
* iw_priv_type_size
[type
];
543 /* ---------------------------------------------------------------- */
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...
549 static int iw_handler_get_iwstats(struct net_device
* dev
,
550 struct iw_request_info
* info
,
551 union iwreq_data
* wrqu
,
554 /* Get stats from the driver */
555 struct iw_statistics
*stats
;
557 stats
= get_wireless_stats(dev
);
559 /* Copy statistics to extra */
560 memcpy(extra
, stats
, sizeof(struct iw_statistics
));
561 wrqu
->data
.length
= sizeof(struct iw_statistics
);
563 /* Check if we need to clear the updated flag */
564 if (wrqu
->data
.flags
!= 0)
565 stats
->qual
.updated
&= ~IW_QUAL_ALL_UPDATED
;
571 /* ---------------------------------------------------------------- */
573 * Standard Wireless Handler : get iwpriv definitions
574 * Export the driver private handler definition
575 * They will be picked up by tools like iwpriv...
577 static int iw_handler_get_private(struct net_device
* dev
,
578 struct iw_request_info
* info
,
579 union iwreq_data
* wrqu
,
582 /* Check if the driver has something to export */
583 if ((dev
->wireless_handlers
->num_private_args
== 0) ||
584 (dev
->wireless_handlers
->private_args
== NULL
))
587 /* Check if there is enough buffer up there */
588 if (wrqu
->data
.length
< dev
->wireless_handlers
->num_private_args
) {
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
;
596 /* Set the number of available ioctls. */
597 wrqu
->data
.length
= dev
->wireless_handlers
->num_private_args
;
599 /* Copy structure to the user buffer. */
600 memcpy(extra
, dev
->wireless_handlers
->private_args
,
601 sizeof(struct iw_priv_args
) * wrqu
->data
.length
);
607 /******************** /proc/net/wireless SUPPORT ********************/
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 ;-)
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".
617 #ifdef CONFIG_PROC_FS
619 /* ---------------------------------------------------------------- */
621 * Print one entry (line) of /proc/net/wireless
623 static void wireless_seq_printf_stats(struct seq_file
*seq
,
624 struct net_device
*dev
)
626 /* Get stats from the driver */
627 struct iw_statistics
*stats
= get_wireless_stats(dev
);
630 seq_printf(seq
, "%6s: %04x %3d%c %3d%c %3d%c %6d %6d %6d "
632 dev
->name
, stats
->status
, stats
->qual
.qual
,
633 stats
->qual
.updated
& IW_QUAL_QUAL_UPDATED
635 ((__s32
) stats
->qual
.level
) -
636 ((stats
->qual
.updated
& IW_QUAL_DBM
) ? 0x100 : 0),
637 stats
->qual
.updated
& IW_QUAL_LEVEL_UPDATED
639 ((__s32
) stats
->qual
.noise
) -
640 ((stats
->qual
.updated
& IW_QUAL_DBM
) ? 0x100 : 0),
641 stats
->qual
.updated
& IW_QUAL_NOISE_UPDATED
643 stats
->discard
.nwid
, stats
->discard
.code
,
644 stats
->discard
.fragment
, stats
->discard
.retries
,
645 stats
->discard
.misc
, stats
->miss
.beacon
);
646 stats
->qual
.updated
&= ~IW_QUAL_ALL_UPDATED
;
650 /* ---------------------------------------------------------------- */
652 * Print info for /proc/net/wireless (print all entries)
654 static int wireless_seq_show(struct seq_file
*seq
, void *v
)
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",
663 wireless_seq_printf_stats(seq
, v
);
667 static const struct seq_operations wireless_seq_ops
= {
668 .start
= dev_seq_start
,
669 .next
= dev_seq_next
,
670 .stop
= dev_seq_stop
,
671 .show
= wireless_seq_show
,
674 static int wireless_seq_open(struct inode
*inode
, struct file
*file
)
676 return seq_open(file
, &wireless_seq_ops
);
679 static const struct file_operations wireless_seq_fops
= {
680 .owner
= THIS_MODULE
,
681 .open
= wireless_seq_open
,
684 .release
= seq_release
,
687 int __init
wext_proc_init(void)
689 /* Create /proc/net/wireless entry */
690 if (!proc_net_fops_create(&init_net
, "wireless", S_IRUGO
, &wireless_seq_fops
))
695 #endif /* CONFIG_PROC_FS */
697 /************************** IOCTL SUPPORT **************************/
699 * The original user space API to configure all those Wireless Extensions
701 * In there, we check if we need to call the new driver API (iw_handler)
702 * or just call the driver ioctl handler.
705 /* ---------------------------------------------------------------- */
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.
711 static int ioctl_standard_call(struct net_device
* dev
,
716 struct iwreq
* iwr
= (struct iwreq
*) ifr
;
717 const struct iw_ioctl_description
* descr
;
718 struct iw_request_info info
;
721 /* Get the description of the IOCTL */
722 if ((cmd
- SIOCIWFIRST
) >= standard_ioctl_num
)
724 descr
= &(standard_ioctl
[cmd
- SIOCIWFIRST
]);
726 /* Prepare the call */
730 /* Check if we have a pointer to user space data or not */
731 if (descr
->header_type
!= IW_HEADER_TYPE_POINT
) {
733 /* No extra arguments. Trivial to handle */
734 ret
= handler(dev
, &info
, &(iwr
->u
), NULL
);
736 /* Generate an event to notify listeners of the change */
737 if ((descr
->flags
& IW_DESCR_FLAG_EVENT
) &&
738 ((ret
== 0) || (ret
== -EIWCOMMIT
)))
739 wireless_send_event(dev
, cmd
, &(iwr
->u
), NULL
);
745 int essid_compat
= 0;
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
;
751 /* Check need for ESSID compatibility for WE < 21 */
757 if (iwr
->u
.data
.length
== descr
->max_tokens
+ 1)
759 else if (IW_IS_SET(cmd
) && (iwr
->u
.data
.length
!= 0)) {
760 char essid
[IW_ESSID_MAX_SIZE
+ 1];
762 err
= copy_from_user(essid
, iwr
->u
.data
.pointer
,
768 if (essid
[iwr
->u
.data
.length
- 1] == '\0')
776 iwr
->u
.data
.length
-= essid_compat
;
778 /* Check what user space is giving us */
779 if (IW_IS_SET(cmd
)) {
780 /* Check NULL pointer */
781 if ((iwr
->u
.data
.pointer
== NULL
) &&
782 (iwr
->u
.data
.length
!= 0))
784 /* Check if number of token fits within bounds */
785 if (iwr
->u
.data
.length
> descr
->max_tokens
)
787 if (iwr
->u
.data
.length
< descr
->min_tokens
)
790 /* Check NULL pointer */
791 if (iwr
->u
.data
.pointer
== NULL
)
793 /* Save user space buffer size for checking */
794 user_length
= iwr
->u
.data
.length
;
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. */
800 /* Support for very large requests */
801 if ((descr
->flags
& IW_DESCR_FLAG_NOMAX
) &&
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... */
814 /* Create the kernel buffer */
815 /* kzalloc ensures NULL-termination for essid_compat */
816 extra
= kzalloc(extra_size
, GFP_KERNEL
);
820 /* If it is a SET, get all the extra data in here */
821 if (IW_IS_SET(cmd
) && (iwr
->u
.data
.length
!= 0)) {
822 err
= copy_from_user(extra
, iwr
->u
.data
.pointer
,
831 /* Call the handler */
832 ret
= handler(dev
, &info
, &(iwr
->u
), extra
);
834 iwr
->u
.data
.length
+= essid_compat
;
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 */
839 if (user_length
< iwr
->u
.data
.length
) {
844 err
= copy_to_user(iwr
->u
.data
.pointer
, extra
,
851 /* Generate an event to notify listeners of the change */
852 if ((descr
->flags
& IW_DESCR_FLAG_EVENT
) &&
853 ((ret
== 0) || (ret
== -EIWCOMMIT
))) {
854 if (descr
->flags
& IW_DESCR_FLAG_RESTRICT
)
855 /* If the event is restricted, don't
856 * export the payload */
857 wireless_send_event(dev
, cmd
, &(iwr
->u
), NULL
);
859 wireless_send_event(dev
, cmd
, &(iwr
->u
),
863 /* Cleanup - I told you it wasn't that long ;-) */
867 /* Call commit handler if needed and defined */
868 if (ret
== -EIWCOMMIT
)
869 ret
= call_commit_handler(dev
);
871 /* Here, we will generate the appropriate event if needed */
876 /* ---------------------------------------------------------------- */
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.
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
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
892 static int ioctl_private_call(struct net_device
*dev
, struct ifreq
*ifr
,
893 unsigned int cmd
, iw_handler handler
)
895 struct iwreq
* iwr
= (struct iwreq
*) ifr
;
896 const struct iw_priv_args
* descr
= NULL
;
897 struct iw_request_info info
;
902 /* Get the description of the IOCTL */
903 for (i
= 0; i
< dev
->wireless_handlers
->num_private_args
; i
++)
904 if (cmd
== dev
->wireless_handlers
->private_args
[i
].cmd
) {
905 descr
= &(dev
->wireless_handlers
->private_args
[i
]);
909 /* Compute the size of the set/get arguments */
911 if (IW_IS_SET(cmd
)) {
912 int offset
= 0; /* For sub-ioctls */
913 /* Check for sub-ioctl handler */
914 if (descr
->name
[0] == '\0')
915 /* Reserve one int for sub-ioctl index */
916 offset
= sizeof(__u32
);
918 /* Size of set arguments */
919 extra_size
= get_priv_size(descr
->set_args
);
921 /* Does it fits in iwr ? */
922 if ((descr
->set_args
& IW_PRIV_SIZE_FIXED
) &&
923 ((extra_size
+ offset
) <= IFNAMSIZ
))
926 /* Size of get arguments */
927 extra_size
= get_priv_size(descr
->get_args
);
929 /* Does it fits in iwr ? */
930 if ((descr
->get_args
& IW_PRIV_SIZE_FIXED
) &&
931 (extra_size
<= IFNAMSIZ
))
936 /* Prepare the call */
940 /* Check if we have a pointer to user space data or not. */
941 if (extra_size
== 0) {
942 /* No extra arguments. Trivial to handle */
943 ret
= handler(dev
, &info
, &(iwr
->u
), (char *) &(iwr
->u
));
948 /* Check what user space is giving us */
949 if (IW_IS_SET(cmd
)) {
950 /* Check NULL pointer */
951 if ((iwr
->u
.data
.pointer
== NULL
) &&
952 (iwr
->u
.data
.length
!= 0))
955 /* Does it fits within bounds ? */
956 if (iwr
->u
.data
.length
> (descr
->set_args
&
959 } else if (iwr
->u
.data
.pointer
== NULL
)
962 /* Always allocate for max space. Easier, and won't last
964 extra
= kmalloc(extra_size
, GFP_KERNEL
);
968 /* If it is a SET, get all the extra data in here */
969 if (IW_IS_SET(cmd
) && (iwr
->u
.data
.length
!= 0)) {
970 err
= copy_from_user(extra
, iwr
->u
.data
.pointer
,
978 /* Call the handler */
979 ret
= handler(dev
, &info
, &(iwr
->u
), extra
);
981 /* If we have something to return to the user */
982 if (!ret
&& IW_IS_GET(cmd
)) {
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
,
991 err
= copy_to_user(iwr
->u
.data
.pointer
, extra
,
997 /* Cleanup - I told you it wasn't that long ;-) */
1002 /* Call commit handler if needed and defined */
1003 if (ret
== -EIWCOMMIT
)
1004 ret
= call_commit_handler(dev
);
1009 /* ---------------------------------------------------------------- */
1011 * Main IOCTl dispatcher.
1012 * Check the type of IOCTL and call the appropriate wrapper...
1014 static int wireless_process_ioctl(struct ifreq
*ifr
, unsigned int cmd
)
1016 struct net_device
*dev
;
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 */
1022 /* Make sure the device exist */
1023 if ((dev
= __dev_get_by_name(ifr
->ifr_name
)) == NULL
)
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) */
1029 if (cmd
== SIOCGIWSTATS
)
1030 return ioctl_standard_call(dev
, ifr
, cmd
,
1031 &iw_handler_get_iwstats
);
1033 if (cmd
== SIOCGIWPRIV
&& dev
->wireless_handlers
)
1034 return ioctl_standard_call(dev
, ifr
, cmd
,
1035 &iw_handler_get_private
);
1038 if (!netif_device_present(dev
))
1041 /* New driver API : try to find the handler */
1042 handler
= get_handler(dev
, cmd
);
1044 /* Standard and private are not the same */
1045 if (cmd
< SIOCIWFIRSTPRIV
)
1046 return ioctl_standard_call(dev
, ifr
, cmd
, handler
);
1048 return ioctl_private_call(dev
, ifr
, cmd
, handler
);
1050 /* Old driver API : call driver ioctl handler */
1052 return dev
->do_ioctl(dev
, ifr
, cmd
);
1056 /* entry point from dev ioctl */
1057 int wext_handle_ioctl(struct ifreq
*ifr
, unsigned int cmd
,
1062 /* If command is `set a parameter', or
1063 * `get the encoding parameters', check if
1064 * the user has the right to do it */
1065 if ((IW_IS_SET(cmd
) || cmd
== SIOCGIWENCODE
|| cmd
== SIOCGIWENCODEEXT
)
1066 && !capable(CAP_NET_ADMIN
))
1069 dev_load(ifr
->ifr_name
);
1071 ret
= wireless_process_ioctl(ifr
, cmd
);
1073 if (IW_IS_GET(cmd
) && copy_to_user(arg
, ifr
, sizeof(struct ifreq
)))
1078 /************************* EVENT PROCESSING *************************/
1080 * Process events generated by the wireless layer or the driver.
1081 * Most often, the event will be propagated through rtnetlink
1084 /* ---------------------------------------------------------------- */
1089 * Thanks to Herbert Xu <herbert@gondor.apana.org.au> for fixing
1090 * the locking issue in here and implementing this code !
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.
1101 static struct sk_buff_head wireless_nlevent_queue
;
1103 static int __init
wireless_nlevent_init(void)
1105 skb_queue_head_init(&wireless_nlevent_queue
);
1109 subsys_initcall(wireless_nlevent_init
);
1111 static void wireless_nlevent_process(unsigned long data
)
1113 struct sk_buff
*skb
;
1115 while ((skb
= skb_dequeue(&wireless_nlevent_queue
)))
1116 rtnl_notify(skb
, 0, RTNLGRP_LINK
, NULL
, GFP_ATOMIC
);
1119 static DECLARE_TASKLET(wireless_nlevent_tasklet
, wireless_nlevent_process
, 0);
1121 /* ---------------------------------------------------------------- */
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).
1128 static int rtnetlink_fill_iwinfo(struct sk_buff
*skb
, struct net_device
*dev
,
1129 int type
, char *event
, int event_len
)
1131 struct ifinfomsg
*r
;
1132 struct nlmsghdr
*nlh
;
1134 nlh
= nlmsg_put(skb
, 0, 0, type
, sizeof(*r
), 0);
1138 r
= nlmsg_data(nlh
);
1139 r
->ifi_family
= AF_UNSPEC
;
1141 r
->ifi_type
= dev
->type
;
1142 r
->ifi_index
= dev
->ifindex
;
1143 r
->ifi_flags
= dev_get_flags(dev
);
1144 r
->ifi_change
= 0; /* Wireless changes don't affect those flags */
1146 /* Add the wireless events in the netlink packet */
1147 NLA_PUT(skb
, IFLA_WIRELESS
, event_len
, event
);
1149 return nlmsg_end(skb
, nlh
);
1152 nlmsg_cancel(skb
, nlh
);
1156 /* ---------------------------------------------------------------- */
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.
1163 static void rtmsg_iwinfo(struct net_device
*dev
, char *event
, int event_len
)
1165 struct sk_buff
*skb
;
1168 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1172 err
= rtnetlink_fill_iwinfo(skb
, dev
, RTM_NEWLINK
, event
, event_len
);
1174 WARN_ON(err
== -EMSGSIZE
);
1179 NETLINK_CB(skb
).dst_group
= RTNLGRP_LINK
;
1180 skb_queue_tail(&wireless_nlevent_queue
, skb
);
1181 tasklet_schedule(&wireless_nlevent_tasklet
);
1184 /* ---------------------------------------------------------------- */
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.
1190 void wireless_send_event(struct net_device
* dev
,
1192 union iwreq_data
* wrqu
,
1195 const struct iw_ioctl_description
* descr
= NULL
;
1197 struct iw_event
*event
; /* Mallocated whole event */
1198 int event_len
; /* Its size */
1199 int hdr_len
; /* Size of the event header */
1200 int wrqu_off
= 0; /* Offset in wrqu */
1201 /* Don't "optimise" the following variable, it will crash */
1202 unsigned cmd_index
; /* *MUST* be unsigned */
1204 /* Get the description of the Event */
1205 if (cmd
<= SIOCIWLAST
) {
1206 cmd_index
= cmd
- SIOCIWFIRST
;
1207 if (cmd_index
< standard_ioctl_num
)
1208 descr
= &(standard_ioctl
[cmd_index
]);
1210 cmd_index
= cmd
- IWEVFIRST
;
1211 if (cmd_index
< standard_event_num
)
1212 descr
= &(standard_event
[cmd_index
]);
1214 /* Don't accept unknown events */
1215 if (descr
== NULL
) {
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...
1223 printk(KERN_ERR
"%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n",
1228 /* Check extra parameters and set extra_len */
1229 if (descr
->header_type
== IW_HEADER_TYPE_POINT
) {
1230 /* Check if number of token fits within bounds */
1231 if (wrqu
->data
.length
> descr
->max_tokens
) {
1232 printk(KERN_ERR
"%s (WE) : Wireless Event too big (%d)\n", dev
->name
, wrqu
->data
.length
);
1235 if (wrqu
->data
.length
< descr
->min_tokens
) {
1236 printk(KERN_ERR
"%s (WE) : Wireless Event too small (%d)\n", dev
->name
, wrqu
->data
.length
);
1239 /* Calculate extra_len - extra is NULL for restricted events */
1241 extra_len
= wrqu
->data
.length
* descr
->token_size
;
1242 /* Always at an offset in wrqu */
1243 wrqu_off
= IW_EV_POINT_OFF
;
1246 /* Total length of the event */
1247 hdr_len
= event_type_size
[descr
->header_type
];
1248 event_len
= hdr_len
+ extra_len
;
1250 /* Create temporary buffer to hold the event */
1251 event
= kmalloc(event_len
, GFP_ATOMIC
);
1256 event
->len
= event_len
;
1258 memcpy(&event
->u
, ((char *) wrqu
) + wrqu_off
, hdr_len
- IW_EV_LCP_LEN
);
1260 memcpy(((char *) event
) + hdr_len
, extra
, extra_len
);
1262 /* Send via the RtNetlink event channel */
1263 rtmsg_iwinfo(dev
, (char *) event
, event_len
);
1268 return; /* Always success, I guess ;-) */
1270 EXPORT_SYMBOL(wireless_send_event
);
1272 /********************** ENHANCED IWSPY SUPPORT **********************/
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
1278 * in its private part (and export it in net_device->wireless_data->spy_data).
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.
1284 /* ---------------------------------------------------------------- */
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...
1290 static inline struct iw_spy_data
*get_spydata(struct net_device
*dev
)
1292 /* This is the new way */
1293 if (dev
->wireless_data
)
1294 return dev
->wireless_data
->spy_data
;
1298 /*------------------------------------------------------------------*/
1300 * Standard Wireless Handler : set Spy List
1302 int iw_handler_set_spy(struct net_device
* dev
,
1303 struct iw_request_info
* info
,
1304 union iwreq_data
* wrqu
,
1307 struct iw_spy_data
* spydata
= get_spydata(dev
);
1308 struct sockaddr
* address
= (struct sockaddr
*) extra
;
1310 /* Make sure driver is not buggy or using the old API */
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;
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. */
1327 /* Are there are addresses to copy? */
1328 if (wrqu
->data
.length
> 0) {
1331 /* Copy addresses */
1332 for (i
= 0; i
< wrqu
->data
.length
; i
++)
1333 memcpy(spydata
->spy_address
[i
], address
[i
].sa_data
,
1336 memset(spydata
->spy_stat
, 0,
1337 sizeof(struct iw_quality
) * IW_MAX_SPY
);
1340 /* Make sure above is updated before re-enabling */
1343 /* Enable addresses */
1344 spydata
->spy_number
= wrqu
->data
.length
;
1348 EXPORT_SYMBOL(iw_handler_set_spy
);
1350 /*------------------------------------------------------------------*/
1352 * Standard Wireless Handler : get Spy List
1354 int iw_handler_get_spy(struct net_device
* dev
,
1355 struct iw_request_info
* info
,
1356 union iwreq_data
* wrqu
,
1359 struct iw_spy_data
* spydata
= get_spydata(dev
);
1360 struct sockaddr
* address
= (struct sockaddr
*) extra
;
1363 /* Make sure driver is not buggy or using the old API */
1367 wrqu
->data
.length
= spydata
->spy_number
;
1369 /* Copy addresses. */
1370 for (i
= 0; i
< spydata
->spy_number
; i
++) {
1371 memcpy(address
[i
].sa_data
, spydata
->spy_address
[i
], ETH_ALEN
);
1372 address
[i
].sa_family
= AF_UNIX
;
1374 /* Copy stats to the user buffer (just after). */
1375 if (spydata
->spy_number
> 0)
1376 memcpy(extra
+ (sizeof(struct sockaddr
) *spydata
->spy_number
),
1378 sizeof(struct iw_quality
) * spydata
->spy_number
);
1379 /* Reset updated flags. */
1380 for (i
= 0; i
< spydata
->spy_number
; i
++)
1381 spydata
->spy_stat
[i
].updated
&= ~IW_QUAL_ALL_UPDATED
;
1384 EXPORT_SYMBOL(iw_handler_get_spy
);
1386 /*------------------------------------------------------------------*/
1388 * Standard Wireless Handler : set spy threshold
1390 int iw_handler_set_thrspy(struct net_device
* dev
,
1391 struct iw_request_info
*info
,
1392 union iwreq_data
* wrqu
,
1395 struct iw_spy_data
* spydata
= get_spydata(dev
);
1396 struct iw_thrspy
* threshold
= (struct iw_thrspy
*) extra
;
1398 /* Make sure driver is not buggy or using the old API */
1403 memcpy(&(spydata
->spy_thr_low
), &(threshold
->low
),
1404 2 * sizeof(struct iw_quality
));
1407 memset(spydata
->spy_thr_under
, '\0', sizeof(spydata
->spy_thr_under
));
1411 EXPORT_SYMBOL(iw_handler_set_thrspy
);
1413 /*------------------------------------------------------------------*/
1415 * Standard Wireless Handler : get spy threshold
1417 int iw_handler_get_thrspy(struct net_device
* dev
,
1418 struct iw_request_info
*info
,
1419 union iwreq_data
* wrqu
,
1422 struct iw_spy_data
* spydata
= get_spydata(dev
);
1423 struct iw_thrspy
* threshold
= (struct iw_thrspy
*) extra
;
1425 /* Make sure driver is not buggy or using the old API */
1430 memcpy(&(threshold
->low
), &(spydata
->spy_thr_low
),
1431 2 * sizeof(struct iw_quality
));
1435 EXPORT_SYMBOL(iw_handler_get_thrspy
);
1437 /*------------------------------------------------------------------*/
1439 * Prepare and send a Spy Threshold event
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
)
1446 union iwreq_data wrqu
;
1447 struct iw_thrspy threshold
;
1450 wrqu
.data
.length
= 1;
1451 wrqu
.data
.flags
= 0;
1453 memcpy(threshold
.addr
.sa_data
, address
, ETH_ALEN
);
1454 threshold
.addr
.sa_family
= ARPHRD_ETHER
;
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
));
1461 /* Send event to user space */
1462 wireless_send_event(dev
, SIOCGIWTHRSPY
, &wrqu
, (char *) &threshold
);
1465 /* ---------------------------------------------------------------- */
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...
1472 void wireless_spy_update(struct net_device
* dev
,
1473 unsigned char * address
,
1474 struct iw_quality
* wstats
)
1476 struct iw_spy_data
* spydata
= get_spydata(dev
);
1480 /* Make sure driver is not buggy or using the old API */
1484 /* Update all records that match */
1485 for (i
= 0; i
< spydata
->spy_number
; i
++)
1486 if (!compare_ether_addr(address
, spydata
->spy_address
[i
])) {
1487 memcpy(&(spydata
->spy_stat
[i
]), wstats
,
1488 sizeof(struct iw_quality
));
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. */
1497 if (spydata
->spy_thr_under
[match
]) {
1498 if (wstats
->level
> spydata
->spy_thr_high
.level
) {
1499 spydata
->spy_thr_under
[match
] = 0;
1500 iw_send_thrspy_event(dev
, spydata
,
1504 if (wstats
->level
< spydata
->spy_thr_low
.level
) {
1505 spydata
->spy_thr_under
[match
] = 1;
1506 iw_send_thrspy_event(dev
, spydata
,
1512 EXPORT_SYMBOL(wireless_spy_update
);