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>
97 #include <linux/wireless.h> /* Pretty obvious */
98 #include <net/iw_handler.h> /* New driver API */
99 #include <net/netlink.h>
100 #include <net/wext.h>
102 #include <asm/uaccess.h> /* copy_to_user() */
104 /************************* GLOBAL VARIABLES *************************/
106 * You should not use global variables, because of re-entrancy.
107 * On our case, it's only const, so it's OK...
110 * Meta-data about all the standard Wireless Extension request we
113 static const struct iw_ioctl_description standard_ioctl
[] = {
114 [SIOCSIWCOMMIT
- SIOCIWFIRST
] = {
115 .header_type
= IW_HEADER_TYPE_NULL
,
117 [SIOCGIWNAME
- SIOCIWFIRST
] = {
118 .header_type
= IW_HEADER_TYPE_CHAR
,
119 .flags
= IW_DESCR_FLAG_DUMP
,
121 [SIOCSIWNWID
- SIOCIWFIRST
] = {
122 .header_type
= IW_HEADER_TYPE_PARAM
,
123 .flags
= IW_DESCR_FLAG_EVENT
,
125 [SIOCGIWNWID
- SIOCIWFIRST
] = {
126 .header_type
= IW_HEADER_TYPE_PARAM
,
127 .flags
= IW_DESCR_FLAG_DUMP
,
129 [SIOCSIWFREQ
- SIOCIWFIRST
] = {
130 .header_type
= IW_HEADER_TYPE_FREQ
,
131 .flags
= IW_DESCR_FLAG_EVENT
,
133 [SIOCGIWFREQ
- SIOCIWFIRST
] = {
134 .header_type
= IW_HEADER_TYPE_FREQ
,
135 .flags
= IW_DESCR_FLAG_DUMP
,
137 [SIOCSIWMODE
- SIOCIWFIRST
] = {
138 .header_type
= IW_HEADER_TYPE_UINT
,
139 .flags
= IW_DESCR_FLAG_EVENT
,
141 [SIOCGIWMODE
- SIOCIWFIRST
] = {
142 .header_type
= IW_HEADER_TYPE_UINT
,
143 .flags
= IW_DESCR_FLAG_DUMP
,
145 [SIOCSIWSENS
- SIOCIWFIRST
] = {
146 .header_type
= IW_HEADER_TYPE_PARAM
,
148 [SIOCGIWSENS
- SIOCIWFIRST
] = {
149 .header_type
= IW_HEADER_TYPE_PARAM
,
151 [SIOCSIWRANGE
- SIOCIWFIRST
] = {
152 .header_type
= IW_HEADER_TYPE_NULL
,
154 [SIOCGIWRANGE
- SIOCIWFIRST
] = {
155 .header_type
= IW_HEADER_TYPE_POINT
,
157 .max_tokens
= sizeof(struct iw_range
),
158 .flags
= IW_DESCR_FLAG_DUMP
,
160 [SIOCSIWPRIV
- SIOCIWFIRST
] = {
161 .header_type
= IW_HEADER_TYPE_NULL
,
163 [SIOCGIWPRIV
- SIOCIWFIRST
] = { /* (handled directly by us) */
164 .header_type
= IW_HEADER_TYPE_POINT
,
165 .token_size
= sizeof(struct iw_priv_args
),
167 .flags
= IW_DESCR_FLAG_NOMAX
,
169 [SIOCSIWSTATS
- SIOCIWFIRST
] = {
170 .header_type
= IW_HEADER_TYPE_NULL
,
172 [SIOCGIWSTATS
- SIOCIWFIRST
] = { /* (handled directly by us) */
173 .header_type
= IW_HEADER_TYPE_POINT
,
175 .max_tokens
= sizeof(struct iw_statistics
),
176 .flags
= IW_DESCR_FLAG_DUMP
,
178 [SIOCSIWSPY
- SIOCIWFIRST
] = {
179 .header_type
= IW_HEADER_TYPE_POINT
,
180 .token_size
= sizeof(struct sockaddr
),
181 .max_tokens
= IW_MAX_SPY
,
183 [SIOCGIWSPY
- SIOCIWFIRST
] = {
184 .header_type
= IW_HEADER_TYPE_POINT
,
185 .token_size
= sizeof(struct sockaddr
) +
186 sizeof(struct iw_quality
),
187 .max_tokens
= IW_MAX_SPY
,
189 [SIOCSIWTHRSPY
- SIOCIWFIRST
] = {
190 .header_type
= IW_HEADER_TYPE_POINT
,
191 .token_size
= sizeof(struct iw_thrspy
),
195 [SIOCGIWTHRSPY
- SIOCIWFIRST
] = {
196 .header_type
= IW_HEADER_TYPE_POINT
,
197 .token_size
= sizeof(struct iw_thrspy
),
201 [SIOCSIWAP
- SIOCIWFIRST
] = {
202 .header_type
= IW_HEADER_TYPE_ADDR
,
204 [SIOCGIWAP
- SIOCIWFIRST
] = {
205 .header_type
= IW_HEADER_TYPE_ADDR
,
206 .flags
= IW_DESCR_FLAG_DUMP
,
208 [SIOCSIWMLME
- SIOCIWFIRST
] = {
209 .header_type
= IW_HEADER_TYPE_POINT
,
211 .min_tokens
= sizeof(struct iw_mlme
),
212 .max_tokens
= sizeof(struct iw_mlme
),
214 [SIOCGIWAPLIST
- SIOCIWFIRST
] = {
215 .header_type
= IW_HEADER_TYPE_POINT
,
216 .token_size
= sizeof(struct sockaddr
) +
217 sizeof(struct iw_quality
),
218 .max_tokens
= IW_MAX_AP
,
219 .flags
= IW_DESCR_FLAG_NOMAX
,
221 [SIOCSIWSCAN
- SIOCIWFIRST
] = {
222 .header_type
= IW_HEADER_TYPE_POINT
,
225 .max_tokens
= sizeof(struct iw_scan_req
),
227 [SIOCGIWSCAN
- SIOCIWFIRST
] = {
228 .header_type
= IW_HEADER_TYPE_POINT
,
230 .max_tokens
= IW_SCAN_MAX_DATA
,
231 .flags
= IW_DESCR_FLAG_NOMAX
,
233 [SIOCSIWESSID
- SIOCIWFIRST
] = {
234 .header_type
= IW_HEADER_TYPE_POINT
,
236 .max_tokens
= IW_ESSID_MAX_SIZE
,
237 .flags
= IW_DESCR_FLAG_EVENT
,
239 [SIOCGIWESSID
- SIOCIWFIRST
] = {
240 .header_type
= IW_HEADER_TYPE_POINT
,
242 .max_tokens
= IW_ESSID_MAX_SIZE
,
243 .flags
= IW_DESCR_FLAG_DUMP
,
245 [SIOCSIWNICKN
- SIOCIWFIRST
] = {
246 .header_type
= IW_HEADER_TYPE_POINT
,
248 .max_tokens
= IW_ESSID_MAX_SIZE
,
250 [SIOCGIWNICKN
- SIOCIWFIRST
] = {
251 .header_type
= IW_HEADER_TYPE_POINT
,
253 .max_tokens
= IW_ESSID_MAX_SIZE
,
255 [SIOCSIWRATE
- SIOCIWFIRST
] = {
256 .header_type
= IW_HEADER_TYPE_PARAM
,
258 [SIOCGIWRATE
- SIOCIWFIRST
] = {
259 .header_type
= IW_HEADER_TYPE_PARAM
,
261 [SIOCSIWRTS
- SIOCIWFIRST
] = {
262 .header_type
= IW_HEADER_TYPE_PARAM
,
264 [SIOCGIWRTS
- SIOCIWFIRST
] = {
265 .header_type
= IW_HEADER_TYPE_PARAM
,
267 [SIOCSIWFRAG
- SIOCIWFIRST
] = {
268 .header_type
= IW_HEADER_TYPE_PARAM
,
270 [SIOCGIWFRAG
- SIOCIWFIRST
] = {
271 .header_type
= IW_HEADER_TYPE_PARAM
,
273 [SIOCSIWTXPOW
- SIOCIWFIRST
] = {
274 .header_type
= IW_HEADER_TYPE_PARAM
,
276 [SIOCGIWTXPOW
- SIOCIWFIRST
] = {
277 .header_type
= IW_HEADER_TYPE_PARAM
,
279 [SIOCSIWRETRY
- SIOCIWFIRST
] = {
280 .header_type
= IW_HEADER_TYPE_PARAM
,
282 [SIOCGIWRETRY
- SIOCIWFIRST
] = {
283 .header_type
= IW_HEADER_TYPE_PARAM
,
285 [SIOCSIWENCODE
- SIOCIWFIRST
] = {
286 .header_type
= IW_HEADER_TYPE_POINT
,
288 .max_tokens
= IW_ENCODING_TOKEN_MAX
,
289 .flags
= IW_DESCR_FLAG_EVENT
| IW_DESCR_FLAG_RESTRICT
,
291 [SIOCGIWENCODE
- SIOCIWFIRST
] = {
292 .header_type
= IW_HEADER_TYPE_POINT
,
294 .max_tokens
= IW_ENCODING_TOKEN_MAX
,
295 .flags
= IW_DESCR_FLAG_DUMP
| IW_DESCR_FLAG_RESTRICT
,
297 [SIOCSIWPOWER
- SIOCIWFIRST
] = {
298 .header_type
= IW_HEADER_TYPE_PARAM
,
300 [SIOCGIWPOWER
- SIOCIWFIRST
] = {
301 .header_type
= IW_HEADER_TYPE_PARAM
,
303 [SIOCSIWGENIE
- SIOCIWFIRST
] = {
304 .header_type
= IW_HEADER_TYPE_POINT
,
306 .max_tokens
= IW_GENERIC_IE_MAX
,
308 [SIOCGIWGENIE
- SIOCIWFIRST
] = {
309 .header_type
= IW_HEADER_TYPE_POINT
,
311 .max_tokens
= IW_GENERIC_IE_MAX
,
313 [SIOCSIWAUTH
- SIOCIWFIRST
] = {
314 .header_type
= IW_HEADER_TYPE_PARAM
,
316 [SIOCGIWAUTH
- SIOCIWFIRST
] = {
317 .header_type
= IW_HEADER_TYPE_PARAM
,
319 [SIOCSIWENCODEEXT
- SIOCIWFIRST
] = {
320 .header_type
= IW_HEADER_TYPE_POINT
,
322 .min_tokens
= sizeof(struct iw_encode_ext
),
323 .max_tokens
= sizeof(struct iw_encode_ext
) +
324 IW_ENCODING_TOKEN_MAX
,
326 [SIOCGIWENCODEEXT
- SIOCIWFIRST
] = {
327 .header_type
= IW_HEADER_TYPE_POINT
,
329 .min_tokens
= sizeof(struct iw_encode_ext
),
330 .max_tokens
= sizeof(struct iw_encode_ext
) +
331 IW_ENCODING_TOKEN_MAX
,
333 [SIOCSIWPMKSA
- SIOCIWFIRST
] = {
334 .header_type
= IW_HEADER_TYPE_POINT
,
336 .min_tokens
= sizeof(struct iw_pmksa
),
337 .max_tokens
= sizeof(struct iw_pmksa
),
340 static const unsigned standard_ioctl_num
= ARRAY_SIZE(standard_ioctl
);
343 * Meta-data about all the additional standard Wireless Extension events
346 static const struct iw_ioctl_description standard_event
[] = {
347 [IWEVTXDROP
- IWEVFIRST
] = {
348 .header_type
= IW_HEADER_TYPE_ADDR
,
350 [IWEVQUAL
- IWEVFIRST
] = {
351 .header_type
= IW_HEADER_TYPE_QUAL
,
353 [IWEVCUSTOM
- IWEVFIRST
] = {
354 .header_type
= IW_HEADER_TYPE_POINT
,
356 .max_tokens
= IW_CUSTOM_MAX
,
358 [IWEVREGISTERED
- IWEVFIRST
] = {
359 .header_type
= IW_HEADER_TYPE_ADDR
,
361 [IWEVEXPIRED
- IWEVFIRST
] = {
362 .header_type
= IW_HEADER_TYPE_ADDR
,
364 [IWEVGENIE
- IWEVFIRST
] = {
365 .header_type
= IW_HEADER_TYPE_POINT
,
367 .max_tokens
= IW_GENERIC_IE_MAX
,
369 [IWEVMICHAELMICFAILURE
- IWEVFIRST
] = {
370 .header_type
= IW_HEADER_TYPE_POINT
,
372 .max_tokens
= sizeof(struct iw_michaelmicfailure
),
374 [IWEVASSOCREQIE
- IWEVFIRST
] = {
375 .header_type
= IW_HEADER_TYPE_POINT
,
377 .max_tokens
= IW_GENERIC_IE_MAX
,
379 [IWEVASSOCRESPIE
- IWEVFIRST
] = {
380 .header_type
= IW_HEADER_TYPE_POINT
,
382 .max_tokens
= IW_GENERIC_IE_MAX
,
384 [IWEVPMKIDCAND
- IWEVFIRST
] = {
385 .header_type
= IW_HEADER_TYPE_POINT
,
387 .max_tokens
= sizeof(struct iw_pmkid_cand
),
390 static const unsigned standard_event_num
= ARRAY_SIZE(standard_event
);
392 /* Size (in bytes) of the various private data types */
393 static const char iw_priv_type_size
[] = {
394 0, /* IW_PRIV_TYPE_NONE */
395 1, /* IW_PRIV_TYPE_BYTE */
396 1, /* IW_PRIV_TYPE_CHAR */
398 sizeof(__u32
), /* IW_PRIV_TYPE_INT */
399 sizeof(struct iw_freq
), /* IW_PRIV_TYPE_FLOAT */
400 sizeof(struct sockaddr
), /* IW_PRIV_TYPE_ADDR */
404 /* Size (in bytes) of various events */
405 static const int event_type_size
[] = {
406 IW_EV_LCP_LEN
, /* IW_HEADER_TYPE_NULL */
408 IW_EV_CHAR_LEN
, /* IW_HEADER_TYPE_CHAR */
410 IW_EV_UINT_LEN
, /* IW_HEADER_TYPE_UINT */
411 IW_EV_FREQ_LEN
, /* IW_HEADER_TYPE_FREQ */
412 IW_EV_ADDR_LEN
, /* IW_HEADER_TYPE_ADDR */
414 IW_EV_POINT_LEN
, /* Without variable payload */
415 IW_EV_PARAM_LEN
, /* IW_HEADER_TYPE_PARAM */
416 IW_EV_QUAL_LEN
, /* IW_HEADER_TYPE_QUAL */
419 /* Size (in bytes) of various events, as packed */
420 static const int event_type_pk_size
[] = {
421 IW_EV_LCP_PK_LEN
, /* IW_HEADER_TYPE_NULL */
423 IW_EV_CHAR_PK_LEN
, /* IW_HEADER_TYPE_CHAR */
425 IW_EV_UINT_PK_LEN
, /* IW_HEADER_TYPE_UINT */
426 IW_EV_FREQ_PK_LEN
, /* IW_HEADER_TYPE_FREQ */
427 IW_EV_ADDR_PK_LEN
, /* IW_HEADER_TYPE_ADDR */
429 IW_EV_POINT_PK_LEN
, /* Without variable payload */
430 IW_EV_PARAM_PK_LEN
, /* IW_HEADER_TYPE_PARAM */
431 IW_EV_QUAL_PK_LEN
, /* IW_HEADER_TYPE_QUAL */
434 /************************ COMMON SUBROUTINES ************************/
436 * Stuff that may be used in various place or doesn't fit in one
437 * of the section below.
440 /* ---------------------------------------------------------------- */
442 * Return the driver handler associated with a specific Wireless Extension.
443 * Called from various place, so make sure it remains efficient.
445 static inline iw_handler
get_handler(struct net_device
*dev
,
448 /* Don't "optimise" the following variable, it will crash */
449 unsigned int index
; /* *MUST* be unsigned */
451 /* Check if we have some wireless handlers defined */
452 if (dev
->wireless_handlers
== NULL
)
455 /* Try as a standard command */
456 index
= cmd
- SIOCIWFIRST
;
457 if (index
< dev
->wireless_handlers
->num_standard
)
458 return dev
->wireless_handlers
->standard
[index
];
460 /* Try as a private command */
461 index
= cmd
- SIOCIWFIRSTPRIV
;
462 if (index
< dev
->wireless_handlers
->num_private
)
463 return dev
->wireless_handlers
->private[index
];
469 /* ---------------------------------------------------------------- */
471 * Get statistics out of the driver
473 static inline struct iw_statistics
*get_wireless_stats(struct net_device
*dev
)
476 if ((dev
->wireless_handlers
!= NULL
) &&
477 (dev
->wireless_handlers
->get_wireless_stats
!= NULL
))
478 return dev
->wireless_handlers
->get_wireless_stats(dev
);
481 return (struct iw_statistics
*) NULL
;
484 /* ---------------------------------------------------------------- */
486 * Call the commit handler in the driver
487 * (if exist and if conditions are right)
489 * Note : our current commit strategy is currently pretty dumb,
490 * but we will be able to improve on that...
491 * The goal is to try to agreagate as many changes as possible
492 * before doing the commit. Drivers that will define a commit handler
493 * are usually those that need a reset after changing parameters, so
494 * we want to minimise the number of reset.
495 * A cool idea is to use a timer : at each "set" command, we re-set the
496 * timer, when the timer eventually fires, we call the driver.
497 * Hopefully, more on that later.
499 * Also, I'm waiting to see how many people will complain about the
500 * netif_running(dev) test. I'm open on that one...
501 * Hopefully, the driver will remember to do a commit in "open()" ;-)
503 static inline int call_commit_handler(struct net_device
* dev
)
505 if ((netif_running(dev
)) &&
506 (dev
->wireless_handlers
->standard
[0] != NULL
)) {
507 /* Call the commit handler on the driver */
508 return dev
->wireless_handlers
->standard
[0](dev
, NULL
,
511 return 0; /* Command completed successfully */
514 /* ---------------------------------------------------------------- */
516 * Calculate size of private arguments
518 static inline int get_priv_size(__u16 args
)
520 int num
= args
& IW_PRIV_SIZE_MASK
;
521 int type
= (args
& IW_PRIV_TYPE_MASK
) >> 12;
523 return num
* iw_priv_type_size
[type
];
526 /* ---------------------------------------------------------------- */
528 * Re-calculate the size of private arguments
530 static inline int adjust_priv_size(__u16 args
,
531 union iwreq_data
* wrqu
)
533 int num
= wrqu
->data
.length
;
534 int max
= args
& IW_PRIV_SIZE_MASK
;
535 int type
= (args
& IW_PRIV_TYPE_MASK
) >> 12;
537 /* Make sure the driver doesn't goof up */
541 return num
* iw_priv_type_size
[type
];
544 /* ---------------------------------------------------------------- */
546 * Standard Wireless Handler : get wireless stats
547 * Allow programatic access to /proc/net/wireless even if /proc
548 * doesn't exist... Also more efficient...
550 static int iw_handler_get_iwstats(struct net_device
* dev
,
551 struct iw_request_info
* info
,
552 union iwreq_data
* wrqu
,
555 /* Get stats from the driver */
556 struct iw_statistics
*stats
;
558 stats
= get_wireless_stats(dev
);
559 if (stats
!= (struct iw_statistics
*) NULL
) {
561 /* Copy statistics to extra */
562 memcpy(extra
, stats
, sizeof(struct iw_statistics
));
563 wrqu
->data
.length
= sizeof(struct iw_statistics
);
565 /* Check if we need to clear the updated flag */
566 if (wrqu
->data
.flags
!= 0)
567 stats
->qual
.updated
&= ~IW_QUAL_ALL_UPDATED
;
573 /* ---------------------------------------------------------------- */
575 * Standard Wireless Handler : get iwpriv definitions
576 * Export the driver private handler definition
577 * They will be picked up by tools like iwpriv...
579 static int iw_handler_get_private(struct net_device
* dev
,
580 struct iw_request_info
* info
,
581 union iwreq_data
* wrqu
,
584 /* Check if the driver has something to export */
585 if ((dev
->wireless_handlers
->num_private_args
== 0) ||
586 (dev
->wireless_handlers
->private_args
== NULL
))
589 /* Check if there is enough buffer up there */
590 if (wrqu
->data
.length
< dev
->wireless_handlers
->num_private_args
) {
591 /* User space can't know in advance how large the buffer
592 * needs to be. Give it a hint, so that we can support
593 * any size buffer we want somewhat efficiently... */
594 wrqu
->data
.length
= dev
->wireless_handlers
->num_private_args
;
598 /* Set the number of available ioctls. */
599 wrqu
->data
.length
= dev
->wireless_handlers
->num_private_args
;
601 /* Copy structure to the user buffer. */
602 memcpy(extra
, dev
->wireless_handlers
->private_args
,
603 sizeof(struct iw_priv_args
) * wrqu
->data
.length
);
609 /******************** /proc/net/wireless SUPPORT ********************/
611 * The /proc/net/wireless file is a human readable user-space interface
612 * exporting various wireless specific statistics from the wireless devices.
613 * This is the most popular part of the Wireless Extensions ;-)
615 * This interface is a pure clone of /proc/net/dev (in net/core/dev.c).
616 * The content of the file is basically the content of "struct iw_statistics".
619 #ifdef CONFIG_PROC_FS
621 /* ---------------------------------------------------------------- */
623 * Print one entry (line) of /proc/net/wireless
625 static __inline__
void wireless_seq_printf_stats(struct seq_file
*seq
,
626 struct net_device
*dev
)
628 /* Get stats from the driver */
629 struct iw_statistics
*stats
= get_wireless_stats(dev
);
632 seq_printf(seq
, "%6s: %04x %3d%c %3d%c %3d%c %6d %6d %6d "
634 dev
->name
, stats
->status
, stats
->qual
.qual
,
635 stats
->qual
.updated
& IW_QUAL_QUAL_UPDATED
637 ((__s32
) stats
->qual
.level
) -
638 ((stats
->qual
.updated
& IW_QUAL_DBM
) ? 0x100 : 0),
639 stats
->qual
.updated
& IW_QUAL_LEVEL_UPDATED
641 ((__s32
) stats
->qual
.noise
) -
642 ((stats
->qual
.updated
& IW_QUAL_DBM
) ? 0x100 : 0),
643 stats
->qual
.updated
& IW_QUAL_NOISE_UPDATED
645 stats
->discard
.nwid
, stats
->discard
.code
,
646 stats
->discard
.fragment
, stats
->discard
.retries
,
647 stats
->discard
.misc
, stats
->miss
.beacon
);
648 stats
->qual
.updated
&= ~IW_QUAL_ALL_UPDATED
;
652 /* ---------------------------------------------------------------- */
654 * Print info for /proc/net/wireless (print all entries)
656 static int wireless_seq_show(struct seq_file
*seq
, void *v
)
658 if (v
== SEQ_START_TOKEN
)
659 seq_printf(seq
, "Inter-| sta-| Quality | Discarded "
660 "packets | Missed | WE\n"
661 " face | tus | link level noise | nwid "
662 "crypt frag retry misc | beacon | %d\n",
665 wireless_seq_printf_stats(seq
, v
);
669 static const struct seq_operations wireless_seq_ops
= {
670 .start
= dev_seq_start
,
671 .next
= dev_seq_next
,
672 .stop
= dev_seq_stop
,
673 .show
= wireless_seq_show
,
676 static int wireless_seq_open(struct inode
*inode
, struct file
*file
)
678 return seq_open(file
, &wireless_seq_ops
);
681 static const struct file_operations wireless_seq_fops
= {
682 .owner
= THIS_MODULE
,
683 .open
= wireless_seq_open
,
686 .release
= seq_release
,
689 int __init
wext_proc_init(void)
691 /* Create /proc/net/wireless entry */
692 if (!proc_net_fops_create("wireless", S_IRUGO
, &wireless_seq_fops
))
697 #endif /* CONFIG_PROC_FS */
699 /************************** IOCTL SUPPORT **************************/
701 * The original user space API to configure all those Wireless Extensions
703 * In there, we check if we need to call the new driver API (iw_handler)
704 * or just call the driver ioctl handler.
707 /* ---------------------------------------------------------------- */
709 * Wrapper to call a standard Wireless Extension handler.
710 * We do various checks and also take care of moving data between
711 * user space and kernel space.
713 static int ioctl_standard_call(struct net_device
* dev
,
718 struct iwreq
* iwr
= (struct iwreq
*) ifr
;
719 const struct iw_ioctl_description
* descr
;
720 struct iw_request_info info
;
723 /* Get the description of the IOCTL */
724 if ((cmd
- SIOCIWFIRST
) >= standard_ioctl_num
)
726 descr
= &(standard_ioctl
[cmd
- SIOCIWFIRST
]);
728 /* Prepare the call */
732 /* Check if we have a pointer to user space data or not */
733 if (descr
->header_type
!= IW_HEADER_TYPE_POINT
) {
735 /* No extra arguments. Trivial to handle */
736 ret
= handler(dev
, &info
, &(iwr
->u
), NULL
);
738 /* Generate an event to notify listeners of the change */
739 if ((descr
->flags
& IW_DESCR_FLAG_EVENT
) &&
740 ((ret
== 0) || (ret
== -EIWCOMMIT
)))
741 wireless_send_event(dev
, cmd
, &(iwr
->u
), NULL
);
747 int essid_compat
= 0;
749 /* Calculate space needed by arguments. Always allocate
750 * for max space. Easier, and won't last long... */
751 extra_size
= descr
->max_tokens
* descr
->token_size
;
753 /* Check need for ESSID compatibility for WE < 21 */
759 if (iwr
->u
.data
.length
== descr
->max_tokens
+ 1)
761 else if (IW_IS_SET(cmd
) && (iwr
->u
.data
.length
!= 0)) {
762 char essid
[IW_ESSID_MAX_SIZE
+ 1];
764 err
= copy_from_user(essid
, iwr
->u
.data
.pointer
,
770 if (essid
[iwr
->u
.data
.length
- 1] == '\0')
778 iwr
->u
.data
.length
-= essid_compat
;
780 /* Check what user space is giving us */
781 if (IW_IS_SET(cmd
)) {
782 /* Check NULL pointer */
783 if ((iwr
->u
.data
.pointer
== NULL
) &&
784 (iwr
->u
.data
.length
!= 0))
786 /* Check if number of token fits within bounds */
787 if (iwr
->u
.data
.length
> descr
->max_tokens
)
789 if (iwr
->u
.data
.length
< descr
->min_tokens
)
792 /* Check NULL pointer */
793 if (iwr
->u
.data
.pointer
== NULL
)
795 /* Save user space buffer size for checking */
796 user_length
= iwr
->u
.data
.length
;
798 /* Don't check if user_length > max to allow forward
799 * compatibility. The test user_length < min is
800 * implied by the test at the end. */
802 /* Support for very large requests */
803 if ((descr
->flags
& IW_DESCR_FLAG_NOMAX
) &&
804 (user_length
> descr
->max_tokens
)) {
805 /* Allow userspace to GET more than max so
806 * we can support any size GET requests.
807 * There is still a limit : -ENOMEM. */
808 extra_size
= user_length
* descr
->token_size
;
809 /* Note : user_length is originally a __u16,
810 * and token_size is controlled by us,
811 * so extra_size won't get negative and
812 * won't overflow... */
816 /* Create the kernel buffer */
817 /* kzalloc ensures NULL-termination for essid_compat */
818 extra
= kzalloc(extra_size
, GFP_KERNEL
);
823 /* If it is a SET, get all the extra data in here */
824 if (IW_IS_SET(cmd
) && (iwr
->u
.data
.length
!= 0)) {
825 err
= copy_from_user(extra
, iwr
->u
.data
.pointer
,
834 /* Call the handler */
835 ret
= handler(dev
, &info
, &(iwr
->u
), extra
);
837 iwr
->u
.data
.length
+= essid_compat
;
839 /* If we have something to return to the user */
840 if (!ret
&& IW_IS_GET(cmd
)) {
841 /* Check if there is enough buffer up there */
842 if (user_length
< iwr
->u
.data
.length
) {
847 err
= copy_to_user(iwr
->u
.data
.pointer
, extra
,
854 /* Generate an event to notify listeners of the change */
855 if ((descr
->flags
& IW_DESCR_FLAG_EVENT
) &&
856 ((ret
== 0) || (ret
== -EIWCOMMIT
))) {
857 if (descr
->flags
& IW_DESCR_FLAG_RESTRICT
)
858 /* If the event is restricted, don't
859 * export the payload */
860 wireless_send_event(dev
, cmd
, &(iwr
->u
), NULL
);
862 wireless_send_event(dev
, cmd
, &(iwr
->u
),
866 /* Cleanup - I told you it wasn't that long ;-) */
870 /* Call commit handler if needed and defined */
871 if (ret
== -EIWCOMMIT
)
872 ret
= call_commit_handler(dev
);
874 /* Here, we will generate the appropriate event if needed */
879 /* ---------------------------------------------------------------- */
881 * Wrapper to call a private Wireless Extension handler.
882 * We do various checks and also take care of moving data between
883 * user space and kernel space.
884 * It's not as nice and slimline as the standard wrapper. The cause
885 * is struct iw_priv_args, which was not really designed for the
886 * job we are going here.
888 * IMPORTANT : This function prevent to set and get data on the same
889 * IOCTL and enforce the SET/GET convention. Not doing it would be
891 * If you need to set and get data at the same time, please don't use
892 * a iw_handler but process it in your ioctl handler (i.e. use the
895 static inline int ioctl_private_call(struct net_device
* dev
,
900 struct iwreq
* iwr
= (struct iwreq
*) ifr
;
901 const struct iw_priv_args
* descr
= NULL
;
902 struct iw_request_info info
;
907 /* Get the description of the IOCTL */
908 for (i
= 0; i
< dev
->wireless_handlers
->num_private_args
; i
++)
909 if (cmd
== dev
->wireless_handlers
->private_args
[i
].cmd
) {
910 descr
= &(dev
->wireless_handlers
->private_args
[i
]);
914 /* Compute the size of the set/get arguments */
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
);
923 /* Size of set arguments */
924 extra_size
= get_priv_size(descr
->set_args
);
926 /* Does it fits in iwr ? */
927 if ((descr
->set_args
& IW_PRIV_SIZE_FIXED
) &&
928 ((extra_size
+ offset
) <= IFNAMSIZ
))
931 /* Size of get arguments */
932 extra_size
= get_priv_size(descr
->get_args
);
934 /* Does it fits in iwr ? */
935 if ((descr
->get_args
& IW_PRIV_SIZE_FIXED
) &&
936 (extra_size
<= IFNAMSIZ
))
941 /* Prepare the call */
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
));
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))
960 /* Does it fits within bounds ? */
961 if (iwr
->u
.data
.length
> (descr
->set_args
&
965 /* Check NULL pointer */
966 if (iwr
->u
.data
.pointer
== NULL
)
970 /* Always allocate for max space. Easier, and won't last
972 extra
= kmalloc(extra_size
, GFP_KERNEL
);
977 /* If it is a SET, get all the extra data in here */
978 if (IW_IS_SET(cmd
) && (iwr
->u
.data
.length
!= 0)) {
979 err
= copy_from_user(extra
, iwr
->u
.data
.pointer
,
987 /* Call the handler */
988 ret
= handler(dev
, &info
, &(iwr
->u
), extra
);
990 /* If we have something to return to the user */
991 if (!ret
&& IW_IS_GET(cmd
)) {
993 /* Adjust for the actual length if it's variable,
994 * avoid leaking kernel bits outside. */
995 if (!(descr
->get_args
& IW_PRIV_SIZE_FIXED
)) {
996 extra_size
= adjust_priv_size(descr
->get_args
,
1000 err
= copy_to_user(iwr
->u
.data
.pointer
, extra
,
1006 /* Cleanup - I told you it wasn't that long ;-) */
1011 /* Call commit handler if needed and defined */
1012 if (ret
== -EIWCOMMIT
)
1013 ret
= call_commit_handler(dev
);
1018 /* ---------------------------------------------------------------- */
1020 * Main IOCTl dispatcher.
1021 * Check the type of IOCTL and call the appropriate wrapper...
1023 static int wireless_process_ioctl(struct ifreq
*ifr
, unsigned int cmd
)
1025 struct net_device
*dev
;
1028 /* Permissions are already checked in dev_ioctl() before calling us.
1029 * The copy_to/from_user() of ifr is also dealt with in there */
1031 /* Make sure the device exist */
1032 if ((dev
= __dev_get_by_name(ifr
->ifr_name
)) == NULL
)
1035 /* A bunch of special cases, then the generic case...
1036 * Note that 'cmd' is already filtered in dev_ioctl() with
1037 * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */
1040 /* Get Wireless Stats */
1041 return ioctl_standard_call(dev
,
1044 &iw_handler_get_iwstats
);
1047 /* Check if we have some wireless handlers defined */
1048 if (dev
->wireless_handlers
!= NULL
) {
1049 /* We export to user space the definition of
1050 * the private handler ourselves */
1051 return ioctl_standard_call(dev
,
1054 &iw_handler_get_private
);
1056 // ## Fall-through for old API ##
1060 if (!netif_device_present(dev
))
1062 /* New driver API : try to find the handler */
1063 handler
= get_handler(dev
, cmd
);
1064 if (handler
!= NULL
) {
1065 /* Standard and private are not the same */
1066 if (cmd
< SIOCIWFIRSTPRIV
)
1067 return ioctl_standard_call(dev
,
1072 return ioctl_private_call(dev
,
1077 /* Old driver API : call driver ioctl handler */
1078 if (dev
->do_ioctl
) {
1079 return dev
->do_ioctl(dev
, ifr
, cmd
);
1087 /* entry point from dev ioctl */
1088 int wext_handle_ioctl(struct ifreq
*ifr
, unsigned int cmd
,
1093 /* If command is `set a parameter', or
1094 * `get the encoding parameters', check if
1095 * the user has the right to do it */
1096 if (IW_IS_SET(cmd
) || cmd
== SIOCGIWENCODE
|| cmd
== SIOCGIWENCODEEXT
)
1097 if (!capable(CAP_NET_ADMIN
))
1099 dev_load(ifr
->ifr_name
);
1101 ret
= wireless_process_ioctl(ifr
, cmd
);
1103 if (IW_IS_GET(cmd
) && copy_to_user(arg
, ifr
, sizeof(struct ifreq
)))
1108 /************************* EVENT PROCESSING *************************/
1110 * Process events generated by the wireless layer or the driver.
1111 * Most often, the event will be propagated through rtnetlink
1114 /* ---------------------------------------------------------------- */
1119 * Thanks to Herbert Xu <herbert@gondor.apana.org.au> for fixing
1120 * the locking issue in here and implementing this code !
1122 * The issue : wireless_send_event() is often called in interrupt context,
1123 * while the Netlink layer can never be called in interrupt context.
1124 * The fully formed RtNetlink events are queued, and then a tasklet is run
1125 * to feed those to Netlink.
1126 * The skb_queue is interrupt safe, and its lock is not held while calling
1127 * Netlink, so there is no possibility of dealock.
1131 static struct sk_buff_head wireless_nlevent_queue
;
1133 static int __init
wireless_nlevent_init(void)
1135 skb_queue_head_init(&wireless_nlevent_queue
);
1139 subsys_initcall(wireless_nlevent_init
);
1141 static void wireless_nlevent_process(unsigned long data
)
1143 struct sk_buff
*skb
;
1145 while ((skb
= skb_dequeue(&wireless_nlevent_queue
)))
1146 rtnl_notify(skb
, 0, RTNLGRP_LINK
, NULL
, GFP_ATOMIC
);
1149 static DECLARE_TASKLET(wireless_nlevent_tasklet
, wireless_nlevent_process
, 0);
1151 /* ---------------------------------------------------------------- */
1153 * Fill a rtnetlink message with our event data.
1154 * Note that we propage only the specified event and don't dump the
1155 * current wireless config. Dumping the wireless config is far too
1156 * expensive (for each parameter, the driver need to query the hardware).
1158 static inline int rtnetlink_fill_iwinfo(struct sk_buff
* skb
,
1159 struct net_device
* dev
,
1164 struct ifinfomsg
*r
;
1165 struct nlmsghdr
*nlh
;
1166 unsigned char *b
= skb_tail_pointer(skb
);
1168 nlh
= NLMSG_PUT(skb
, 0, 0, type
, sizeof(*r
));
1169 r
= NLMSG_DATA(nlh
);
1170 r
->ifi_family
= AF_UNSPEC
;
1172 r
->ifi_type
= dev
->type
;
1173 r
->ifi_index
= dev
->ifindex
;
1174 r
->ifi_flags
= dev_get_flags(dev
);
1175 r
->ifi_change
= 0; /* Wireless changes don't affect those flags */
1177 /* Add the wireless events in the netlink packet */
1178 RTA_PUT(skb
, IFLA_WIRELESS
, event_len
, event
);
1180 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
1189 /* ---------------------------------------------------------------- */
1191 * Create and broadcast and send it on the standard rtnetlink socket
1192 * This is a pure clone rtmsg_ifinfo() in net/core/rtnetlink.c
1193 * Andrzej Krzysztofowicz mandated that I used a IFLA_XXX field
1194 * within a RTM_NEWLINK event.
1196 static inline void rtmsg_iwinfo(struct net_device
* dev
,
1200 struct sk_buff
*skb
;
1201 int size
= NLMSG_GOODSIZE
;
1203 skb
= alloc_skb(size
, GFP_ATOMIC
);
1207 if (rtnetlink_fill_iwinfo(skb
, dev
, RTM_NEWLINK
,
1208 event
, event_len
) < 0) {
1212 NETLINK_CB(skb
).dst_group
= RTNLGRP_LINK
;
1213 skb_queue_tail(&wireless_nlevent_queue
, skb
);
1214 tasklet_schedule(&wireless_nlevent_tasklet
);
1217 /* ---------------------------------------------------------------- */
1219 * Main event dispatcher. Called from other parts and drivers.
1220 * Send the event on the appropriate channels.
1221 * May be called from interrupt context.
1223 void wireless_send_event(struct net_device
* dev
,
1225 union iwreq_data
* wrqu
,
1228 const struct iw_ioctl_description
* descr
= NULL
;
1230 struct iw_event
*event
; /* Mallocated whole event */
1231 int event_len
; /* Its size */
1232 int hdr_len
; /* Size of the event header */
1233 int wrqu_off
= 0; /* Offset in wrqu */
1234 /* Don't "optimise" the following variable, it will crash */
1235 unsigned cmd_index
; /* *MUST* be unsigned */
1237 /* Get the description of the Event */
1238 if (cmd
<= SIOCIWLAST
) {
1239 cmd_index
= cmd
- SIOCIWFIRST
;
1240 if (cmd_index
< standard_ioctl_num
)
1241 descr
= &(standard_ioctl
[cmd_index
]);
1243 cmd_index
= cmd
- IWEVFIRST
;
1244 if (cmd_index
< standard_event_num
)
1245 descr
= &(standard_event
[cmd_index
]);
1247 /* Don't accept unknown events */
1248 if (descr
== NULL
) {
1249 /* Note : we don't return an error to the driver, because
1250 * the driver would not know what to do about it. It can't
1251 * return an error to the user, because the event is not
1252 * initiated by a user request.
1253 * The best the driver could do is to log an error message.
1254 * We will do it ourselves instead...
1256 printk(KERN_ERR
"%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n",
1261 /* Check extra parameters and set extra_len */
1262 if (descr
->header_type
== IW_HEADER_TYPE_POINT
) {
1263 /* Check if number of token fits within bounds */
1264 if (wrqu
->data
.length
> descr
->max_tokens
) {
1265 printk(KERN_ERR
"%s (WE) : Wireless Event too big (%d)\n", dev
->name
, wrqu
->data
.length
);
1268 if (wrqu
->data
.length
< descr
->min_tokens
) {
1269 printk(KERN_ERR
"%s (WE) : Wireless Event too small (%d)\n", dev
->name
, wrqu
->data
.length
);
1272 /* Calculate extra_len - extra is NULL for restricted events */
1274 extra_len
= wrqu
->data
.length
* descr
->token_size
;
1275 /* Always at an offset in wrqu */
1276 wrqu_off
= IW_EV_POINT_OFF
;
1279 /* Total length of the event */
1280 hdr_len
= event_type_size
[descr
->header_type
];
1281 event_len
= hdr_len
+ extra_len
;
1283 /* Create temporary buffer to hold the event */
1284 event
= kmalloc(event_len
, GFP_ATOMIC
);
1289 event
->len
= event_len
;
1291 memcpy(&event
->u
, ((char *) wrqu
) + wrqu_off
, hdr_len
- IW_EV_LCP_LEN
);
1293 memcpy(((char *) event
) + hdr_len
, extra
, extra_len
);
1295 /* Send via the RtNetlink event channel */
1296 rtmsg_iwinfo(dev
, (char *) event
, event_len
);
1301 return; /* Always success, I guess ;-) */
1304 /********************** ENHANCED IWSPY SUPPORT **********************/
1306 * In the old days, the driver was handling spy support all by itself.
1307 * Now, the driver can delegate this task to Wireless Extensions.
1308 * It needs to use those standard spy iw_handler in struct iw_handler_def,
1309 * push data to us via wireless_spy_update() and include struct iw_spy_data
1310 * in its private part (and export it in net_device->wireless_data->spy_data).
1311 * One of the main advantage of centralising spy support here is that
1312 * it becomes much easier to improve and extend it without having to touch
1313 * the drivers. One example is the addition of the Spy-Threshold events.
1316 /* ---------------------------------------------------------------- */
1318 * Return the pointer to the spy data in the driver.
1319 * Because this is called on the Rx path via wireless_spy_update(),
1320 * we want it to be efficient...
1322 static inline struct iw_spy_data
* get_spydata(struct net_device
*dev
)
1324 /* This is the new way */
1325 if (dev
->wireless_data
)
1326 return(dev
->wireless_data
->spy_data
);
1330 /*------------------------------------------------------------------*/
1332 * Standard Wireless Handler : set Spy List
1334 int iw_handler_set_spy(struct net_device
* dev
,
1335 struct iw_request_info
* info
,
1336 union iwreq_data
* wrqu
,
1339 struct iw_spy_data
* spydata
= get_spydata(dev
);
1340 struct sockaddr
* address
= (struct sockaddr
*) extra
;
1342 /* Make sure driver is not buggy or using the old API */
1346 /* Disable spy collection while we copy the addresses.
1347 * While we copy addresses, any call to wireless_spy_update()
1348 * will NOP. This is OK, as anyway the addresses are changing. */
1349 spydata
->spy_number
= 0;
1351 /* We want to operate without locking, because wireless_spy_update()
1352 * most likely will happen in the interrupt handler, and therefore
1353 * have its own locking constraints and needs performance.
1354 * The rtnl_lock() make sure we don't race with the other iw_handlers.
1355 * This make sure wireless_spy_update() "see" that the spy list
1356 * is temporarily disabled. */
1359 /* Are there are addresses to copy? */
1360 if (wrqu
->data
.length
> 0) {
1363 /* Copy addresses */
1364 for (i
= 0; i
< wrqu
->data
.length
; i
++)
1365 memcpy(spydata
->spy_address
[i
], address
[i
].sa_data
,
1368 memset(spydata
->spy_stat
, 0,
1369 sizeof(struct iw_quality
) * IW_MAX_SPY
);
1372 /* Make sure above is updated before re-enabling */
1375 /* Enable addresses */
1376 spydata
->spy_number
= wrqu
->data
.length
;
1381 /*------------------------------------------------------------------*/
1383 * Standard Wireless Handler : get Spy List
1385 int iw_handler_get_spy(struct net_device
* dev
,
1386 struct iw_request_info
* info
,
1387 union iwreq_data
* wrqu
,
1390 struct iw_spy_data
* spydata
= get_spydata(dev
);
1391 struct sockaddr
* address
= (struct sockaddr
*) extra
;
1394 /* Make sure driver is not buggy or using the old API */
1398 wrqu
->data
.length
= spydata
->spy_number
;
1400 /* Copy addresses. */
1401 for (i
= 0; i
< spydata
->spy_number
; i
++) {
1402 memcpy(address
[i
].sa_data
, spydata
->spy_address
[i
], ETH_ALEN
);
1403 address
[i
].sa_family
= AF_UNIX
;
1405 /* Copy stats to the user buffer (just after). */
1406 if (spydata
->spy_number
> 0)
1407 memcpy(extra
+ (sizeof(struct sockaddr
) *spydata
->spy_number
),
1409 sizeof(struct iw_quality
) * spydata
->spy_number
);
1410 /* Reset updated flags. */
1411 for (i
= 0; i
< spydata
->spy_number
; i
++)
1412 spydata
->spy_stat
[i
].updated
&= ~IW_QUAL_ALL_UPDATED
;
1416 /*------------------------------------------------------------------*/
1418 * Standard Wireless Handler : set spy threshold
1420 int iw_handler_set_thrspy(struct net_device
* dev
,
1421 struct iw_request_info
*info
,
1422 union iwreq_data
* wrqu
,
1425 struct iw_spy_data
* spydata
= get_spydata(dev
);
1426 struct iw_thrspy
* threshold
= (struct iw_thrspy
*) extra
;
1428 /* Make sure driver is not buggy or using the old API */
1433 memcpy(&(spydata
->spy_thr_low
), &(threshold
->low
),
1434 2 * sizeof(struct iw_quality
));
1437 memset(spydata
->spy_thr_under
, '\0', sizeof(spydata
->spy_thr_under
));
1442 /*------------------------------------------------------------------*/
1444 * Standard Wireless Handler : get spy threshold
1446 int iw_handler_get_thrspy(struct net_device
* dev
,
1447 struct iw_request_info
*info
,
1448 union iwreq_data
* wrqu
,
1451 struct iw_spy_data
* spydata
= get_spydata(dev
);
1452 struct iw_thrspy
* threshold
= (struct iw_thrspy
*) extra
;
1454 /* Make sure driver is not buggy or using the old API */
1459 memcpy(&(threshold
->low
), &(spydata
->spy_thr_low
),
1460 2 * sizeof(struct iw_quality
));
1465 /*------------------------------------------------------------------*/
1467 * Prepare and send a Spy Threshold event
1469 static void iw_send_thrspy_event(struct net_device
* dev
,
1470 struct iw_spy_data
* spydata
,
1471 unsigned char * address
,
1472 struct iw_quality
* wstats
)
1474 union iwreq_data wrqu
;
1475 struct iw_thrspy threshold
;
1478 wrqu
.data
.length
= 1;
1479 wrqu
.data
.flags
= 0;
1481 memcpy(threshold
.addr
.sa_data
, address
, ETH_ALEN
);
1482 threshold
.addr
.sa_family
= ARPHRD_ETHER
;
1484 memcpy(&(threshold
.qual
), wstats
, sizeof(struct iw_quality
));
1485 /* Copy also thresholds */
1486 memcpy(&(threshold
.low
), &(spydata
->spy_thr_low
),
1487 2 * sizeof(struct iw_quality
));
1489 /* Send event to user space */
1490 wireless_send_event(dev
, SIOCGIWTHRSPY
, &wrqu
, (char *) &threshold
);
1493 /* ---------------------------------------------------------------- */
1495 * Call for the driver to update the spy data.
1496 * For now, the spy data is a simple array. As the size of the array is
1497 * small, this is good enough. If we wanted to support larger number of
1498 * spy addresses, we should use something more efficient...
1500 void wireless_spy_update(struct net_device
* dev
,
1501 unsigned char * address
,
1502 struct iw_quality
* wstats
)
1504 struct iw_spy_data
* spydata
= get_spydata(dev
);
1508 /* Make sure driver is not buggy or using the old API */
1512 /* Update all records that match */
1513 for (i
= 0; i
< spydata
->spy_number
; i
++)
1514 if (!compare_ether_addr(address
, spydata
->spy_address
[i
])) {
1515 memcpy(&(spydata
->spy_stat
[i
]), wstats
,
1516 sizeof(struct iw_quality
));
1520 /* Generate an event if we cross the spy threshold.
1521 * To avoid event storms, we have a simple hysteresis : we generate
1522 * event only when we go under the low threshold or above the
1523 * high threshold. */
1525 if (spydata
->spy_thr_under
[match
]) {
1526 if (wstats
->level
> spydata
->spy_thr_high
.level
) {
1527 spydata
->spy_thr_under
[match
] = 0;
1528 iw_send_thrspy_event(dev
, spydata
,
1532 if (wstats
->level
< spydata
->spy_thr_low
.level
) {
1533 spydata
->spy_thr_under
[match
] = 1;
1534 iw_send_thrspy_event(dev
, spydata
,
1541 EXPORT_SYMBOL(iw_handler_get_spy
);
1542 EXPORT_SYMBOL(iw_handler_get_thrspy
);
1543 EXPORT_SYMBOL(iw_handler_set_spy
);
1544 EXPORT_SYMBOL(iw_handler_set_thrspy
);
1545 EXPORT_SYMBOL(wireless_send_event
);
1546 EXPORT_SYMBOL(wireless_spy_update
);