2 * This file implement the Wireless Extensions APIs.
4 * Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
5 * Copyright (c) 1997-2005 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
63 /***************************** INCLUDES *****************************/
65 #include <linux/config.h> /* Not needed ??? */
66 #include <linux/module.h>
67 #include <linux/types.h> /* off_t */
68 #include <linux/netdevice.h> /* struct ifreq, dev_get_by_name() */
69 #include <linux/proc_fs.h>
70 #include <linux/rtnetlink.h> /* rtnetlink stuff */
71 #include <linux/seq_file.h>
72 #include <linux/init.h> /* for __init */
73 #include <linux/if_arp.h> /* ARPHRD_ETHER */
75 #include <linux/wireless.h> /* Pretty obvious */
76 #include <net/iw_handler.h> /* New driver API */
78 #include <asm/uaccess.h> /* copy_to_user() */
80 /**************************** CONSTANTS ****************************/
83 #undef WE_IOCTL_DEBUG /* Debug IOCTL API */
84 #undef WE_EVENT_DEBUG /* Debug Event dispatcher */
85 #undef WE_SPY_DEBUG /* Debug enhanced spy support */
88 #define WE_EVENT_NETLINK /* Propagate events using rtnetlink */
89 #define WE_SET_EVENT /* Generate an event on some set commands */
91 /************************* GLOBAL VARIABLES *************************/
93 * You should not use global variables, because of re-entrancy.
94 * On our case, it's only const, so it's OK...
97 * Meta-data about all the standard Wireless Extension request we
100 static const struct iw_ioctl_description standard_ioctl
[] = {
101 [SIOCSIWCOMMIT
- SIOCIWFIRST
] = {
102 .header_type
= IW_HEADER_TYPE_NULL
,
104 [SIOCGIWNAME
- SIOCIWFIRST
] = {
105 .header_type
= IW_HEADER_TYPE_CHAR
,
106 .flags
= IW_DESCR_FLAG_DUMP
,
108 [SIOCSIWNWID
- SIOCIWFIRST
] = {
109 .header_type
= IW_HEADER_TYPE_PARAM
,
110 .flags
= IW_DESCR_FLAG_EVENT
,
112 [SIOCGIWNWID
- SIOCIWFIRST
] = {
113 .header_type
= IW_HEADER_TYPE_PARAM
,
114 .flags
= IW_DESCR_FLAG_DUMP
,
116 [SIOCSIWFREQ
- SIOCIWFIRST
] = {
117 .header_type
= IW_HEADER_TYPE_FREQ
,
118 .flags
= IW_DESCR_FLAG_EVENT
,
120 [SIOCGIWFREQ
- SIOCIWFIRST
] = {
121 .header_type
= IW_HEADER_TYPE_FREQ
,
122 .flags
= IW_DESCR_FLAG_DUMP
,
124 [SIOCSIWMODE
- SIOCIWFIRST
] = {
125 .header_type
= IW_HEADER_TYPE_UINT
,
126 .flags
= IW_DESCR_FLAG_EVENT
,
128 [SIOCGIWMODE
- SIOCIWFIRST
] = {
129 .header_type
= IW_HEADER_TYPE_UINT
,
130 .flags
= IW_DESCR_FLAG_DUMP
,
132 [SIOCSIWSENS
- SIOCIWFIRST
] = {
133 .header_type
= IW_HEADER_TYPE_PARAM
,
135 [SIOCGIWSENS
- SIOCIWFIRST
] = {
136 .header_type
= IW_HEADER_TYPE_PARAM
,
138 [SIOCSIWRANGE
- SIOCIWFIRST
] = {
139 .header_type
= IW_HEADER_TYPE_NULL
,
141 [SIOCGIWRANGE
- SIOCIWFIRST
] = {
142 .header_type
= IW_HEADER_TYPE_POINT
,
144 .max_tokens
= sizeof(struct iw_range
),
145 .flags
= IW_DESCR_FLAG_DUMP
,
147 [SIOCSIWPRIV
- SIOCIWFIRST
] = {
148 .header_type
= IW_HEADER_TYPE_NULL
,
150 [SIOCGIWPRIV
- SIOCIWFIRST
] = { /* (handled directly by us) */
151 .header_type
= IW_HEADER_TYPE_NULL
,
153 [SIOCSIWSTATS
- SIOCIWFIRST
] = {
154 .header_type
= IW_HEADER_TYPE_NULL
,
156 [SIOCGIWSTATS
- SIOCIWFIRST
] = { /* (handled directly by us) */
157 .header_type
= IW_HEADER_TYPE_NULL
,
158 .flags
= IW_DESCR_FLAG_DUMP
,
160 [SIOCSIWSPY
- SIOCIWFIRST
] = {
161 .header_type
= IW_HEADER_TYPE_POINT
,
162 .token_size
= sizeof(struct sockaddr
),
163 .max_tokens
= IW_MAX_SPY
,
165 [SIOCGIWSPY
- SIOCIWFIRST
] = {
166 .header_type
= IW_HEADER_TYPE_POINT
,
167 .token_size
= sizeof(struct sockaddr
) +
168 sizeof(struct iw_quality
),
169 .max_tokens
= IW_MAX_SPY
,
171 [SIOCSIWTHRSPY
- SIOCIWFIRST
] = {
172 .header_type
= IW_HEADER_TYPE_POINT
,
173 .token_size
= sizeof(struct iw_thrspy
),
177 [SIOCGIWTHRSPY
- SIOCIWFIRST
] = {
178 .header_type
= IW_HEADER_TYPE_POINT
,
179 .token_size
= sizeof(struct iw_thrspy
),
183 [SIOCSIWAP
- SIOCIWFIRST
] = {
184 .header_type
= IW_HEADER_TYPE_ADDR
,
186 [SIOCGIWAP
- SIOCIWFIRST
] = {
187 .header_type
= IW_HEADER_TYPE_ADDR
,
188 .flags
= IW_DESCR_FLAG_DUMP
,
190 [SIOCSIWMLME
- SIOCIWFIRST
] = {
191 .header_type
= IW_HEADER_TYPE_POINT
,
193 .min_tokens
= sizeof(struct iw_mlme
),
194 .max_tokens
= sizeof(struct iw_mlme
),
196 [SIOCGIWAPLIST
- SIOCIWFIRST
] = {
197 .header_type
= IW_HEADER_TYPE_POINT
,
198 .token_size
= sizeof(struct sockaddr
) +
199 sizeof(struct iw_quality
),
200 .max_tokens
= IW_MAX_AP
,
201 .flags
= IW_DESCR_FLAG_NOMAX
,
203 [SIOCSIWSCAN
- SIOCIWFIRST
] = {
204 .header_type
= IW_HEADER_TYPE_POINT
,
207 .max_tokens
= sizeof(struct iw_scan_req
),
209 [SIOCGIWSCAN
- SIOCIWFIRST
] = {
210 .header_type
= IW_HEADER_TYPE_POINT
,
212 .max_tokens
= IW_SCAN_MAX_DATA
,
213 .flags
= IW_DESCR_FLAG_NOMAX
,
215 [SIOCSIWESSID
- SIOCIWFIRST
] = {
216 .header_type
= IW_HEADER_TYPE_POINT
,
218 .max_tokens
= IW_ESSID_MAX_SIZE
+ 1,
219 .flags
= IW_DESCR_FLAG_EVENT
,
221 [SIOCGIWESSID
- SIOCIWFIRST
] = {
222 .header_type
= IW_HEADER_TYPE_POINT
,
224 .max_tokens
= IW_ESSID_MAX_SIZE
+ 1,
225 .flags
= IW_DESCR_FLAG_DUMP
,
227 [SIOCSIWNICKN
- SIOCIWFIRST
] = {
228 .header_type
= IW_HEADER_TYPE_POINT
,
230 .max_tokens
= IW_ESSID_MAX_SIZE
+ 1,
232 [SIOCGIWNICKN
- SIOCIWFIRST
] = {
233 .header_type
= IW_HEADER_TYPE_POINT
,
235 .max_tokens
= IW_ESSID_MAX_SIZE
+ 1,
237 [SIOCSIWRATE
- SIOCIWFIRST
] = {
238 .header_type
= IW_HEADER_TYPE_PARAM
,
240 [SIOCGIWRATE
- SIOCIWFIRST
] = {
241 .header_type
= IW_HEADER_TYPE_PARAM
,
243 [SIOCSIWRTS
- SIOCIWFIRST
] = {
244 .header_type
= IW_HEADER_TYPE_PARAM
,
246 [SIOCGIWRTS
- SIOCIWFIRST
] = {
247 .header_type
= IW_HEADER_TYPE_PARAM
,
249 [SIOCSIWFRAG
- SIOCIWFIRST
] = {
250 .header_type
= IW_HEADER_TYPE_PARAM
,
252 [SIOCGIWFRAG
- SIOCIWFIRST
] = {
253 .header_type
= IW_HEADER_TYPE_PARAM
,
255 [SIOCSIWTXPOW
- SIOCIWFIRST
] = {
256 .header_type
= IW_HEADER_TYPE_PARAM
,
258 [SIOCGIWTXPOW
- SIOCIWFIRST
] = {
259 .header_type
= IW_HEADER_TYPE_PARAM
,
261 [SIOCSIWRETRY
- SIOCIWFIRST
] = {
262 .header_type
= IW_HEADER_TYPE_PARAM
,
264 [SIOCGIWRETRY
- SIOCIWFIRST
] = {
265 .header_type
= IW_HEADER_TYPE_PARAM
,
267 [SIOCSIWENCODE
- SIOCIWFIRST
] = {
268 .header_type
= IW_HEADER_TYPE_POINT
,
270 .max_tokens
= IW_ENCODING_TOKEN_MAX
,
271 .flags
= IW_DESCR_FLAG_EVENT
| IW_DESCR_FLAG_RESTRICT
,
273 [SIOCGIWENCODE
- SIOCIWFIRST
] = {
274 .header_type
= IW_HEADER_TYPE_POINT
,
276 .max_tokens
= IW_ENCODING_TOKEN_MAX
,
277 .flags
= IW_DESCR_FLAG_DUMP
| IW_DESCR_FLAG_RESTRICT
,
279 [SIOCSIWPOWER
- SIOCIWFIRST
] = {
280 .header_type
= IW_HEADER_TYPE_PARAM
,
282 [SIOCGIWPOWER
- SIOCIWFIRST
] = {
283 .header_type
= IW_HEADER_TYPE_PARAM
,
285 [SIOCSIWGENIE
- SIOCIWFIRST
] = {
286 .header_type
= IW_HEADER_TYPE_POINT
,
288 .max_tokens
= IW_GENERIC_IE_MAX
,
290 [SIOCGIWGENIE
- SIOCIWFIRST
] = {
291 .header_type
= IW_HEADER_TYPE_POINT
,
293 .max_tokens
= IW_GENERIC_IE_MAX
,
295 [SIOCSIWAUTH
- SIOCIWFIRST
] = {
296 .header_type
= IW_HEADER_TYPE_PARAM
,
298 [SIOCGIWAUTH
- SIOCIWFIRST
] = {
299 .header_type
= IW_HEADER_TYPE_PARAM
,
301 [SIOCSIWENCODEEXT
- SIOCIWFIRST
] = {
302 .header_type
= IW_HEADER_TYPE_POINT
,
304 .min_tokens
= sizeof(struct iw_encode_ext
),
305 .max_tokens
= sizeof(struct iw_encode_ext
) +
306 IW_ENCODING_TOKEN_MAX
,
308 [SIOCGIWENCODEEXT
- SIOCIWFIRST
] = {
309 .header_type
= IW_HEADER_TYPE_POINT
,
311 .min_tokens
= sizeof(struct iw_encode_ext
),
312 .max_tokens
= sizeof(struct iw_encode_ext
) +
313 IW_ENCODING_TOKEN_MAX
,
315 [SIOCSIWPMKSA
- SIOCIWFIRST
] = {
316 .header_type
= IW_HEADER_TYPE_POINT
,
318 .min_tokens
= sizeof(struct iw_pmksa
),
319 .max_tokens
= sizeof(struct iw_pmksa
),
322 static const int standard_ioctl_num
= (sizeof(standard_ioctl
) /
323 sizeof(struct iw_ioctl_description
));
326 * Meta-data about all the additional standard Wireless Extension events
329 static const struct iw_ioctl_description standard_event
[] = {
330 [IWEVTXDROP
- IWEVFIRST
] = {
331 .header_type
= IW_HEADER_TYPE_ADDR
,
333 [IWEVQUAL
- IWEVFIRST
] = {
334 .header_type
= IW_HEADER_TYPE_QUAL
,
336 [IWEVCUSTOM
- IWEVFIRST
] = {
337 .header_type
= IW_HEADER_TYPE_POINT
,
339 .max_tokens
= IW_CUSTOM_MAX
,
341 [IWEVREGISTERED
- IWEVFIRST
] = {
342 .header_type
= IW_HEADER_TYPE_ADDR
,
344 [IWEVEXPIRED
- IWEVFIRST
] = {
345 .header_type
= IW_HEADER_TYPE_ADDR
,
347 [IWEVGENIE
- IWEVFIRST
] = {
348 .header_type
= IW_HEADER_TYPE_POINT
,
350 .max_tokens
= IW_GENERIC_IE_MAX
,
352 [IWEVMICHAELMICFAILURE
- IWEVFIRST
] = {
353 .header_type
= IW_HEADER_TYPE_POINT
,
355 .max_tokens
= sizeof(struct iw_michaelmicfailure
),
357 [IWEVASSOCREQIE
- IWEVFIRST
] = {
358 .header_type
= IW_HEADER_TYPE_POINT
,
360 .max_tokens
= IW_GENERIC_IE_MAX
,
362 [IWEVASSOCRESPIE
- IWEVFIRST
] = {
363 .header_type
= IW_HEADER_TYPE_POINT
,
365 .max_tokens
= IW_GENERIC_IE_MAX
,
367 [IWEVPMKIDCAND
- IWEVFIRST
] = {
368 .header_type
= IW_HEADER_TYPE_POINT
,
370 .max_tokens
= sizeof(struct iw_pmkid_cand
),
373 static const int standard_event_num
= (sizeof(standard_event
) /
374 sizeof(struct iw_ioctl_description
));
376 /* Size (in bytes) of the various private data types */
377 static const char iw_priv_type_size
[] = {
378 0, /* IW_PRIV_TYPE_NONE */
379 1, /* IW_PRIV_TYPE_BYTE */
380 1, /* IW_PRIV_TYPE_CHAR */
382 sizeof(__u32
), /* IW_PRIV_TYPE_INT */
383 sizeof(struct iw_freq
), /* IW_PRIV_TYPE_FLOAT */
384 sizeof(struct sockaddr
), /* IW_PRIV_TYPE_ADDR */
388 /* Size (in bytes) of various events */
389 static const int event_type_size
[] = {
390 IW_EV_LCP_LEN
, /* IW_HEADER_TYPE_NULL */
392 IW_EV_CHAR_LEN
, /* IW_HEADER_TYPE_CHAR */
394 IW_EV_UINT_LEN
, /* IW_HEADER_TYPE_UINT */
395 IW_EV_FREQ_LEN
, /* IW_HEADER_TYPE_FREQ */
396 IW_EV_ADDR_LEN
, /* IW_HEADER_TYPE_ADDR */
398 IW_EV_POINT_LEN
, /* Without variable payload */
399 IW_EV_PARAM_LEN
, /* IW_HEADER_TYPE_PARAM */
400 IW_EV_QUAL_LEN
, /* IW_HEADER_TYPE_QUAL */
403 /************************ COMMON SUBROUTINES ************************/
405 * Stuff that may be used in various place or doesn't fit in one
406 * of the section below.
409 /* ---------------------------------------------------------------- */
411 * Return the driver handler associated with a specific Wireless Extension.
412 * Called from various place, so make sure it remains efficient.
414 static inline iw_handler
get_handler(struct net_device
*dev
,
417 /* Don't "optimise" the following variable, it will crash */
418 unsigned int index
; /* *MUST* be unsigned */
420 /* Check if we have some wireless handlers defined */
421 if(dev
->wireless_handlers
== NULL
)
424 /* Try as a standard command */
425 index
= cmd
- SIOCIWFIRST
;
426 if(index
< dev
->wireless_handlers
->num_standard
)
427 return dev
->wireless_handlers
->standard
[index
];
429 /* Try as a private command */
430 index
= cmd
- SIOCIWFIRSTPRIV
;
431 if(index
< dev
->wireless_handlers
->num_private
)
432 return dev
->wireless_handlers
->private[index
];
438 /* ---------------------------------------------------------------- */
440 * Get statistics out of the driver
442 static inline struct iw_statistics
*get_wireless_stats(struct net_device
*dev
)
445 if((dev
->wireless_handlers
!= NULL
) &&
446 (dev
->wireless_handlers
->get_wireless_stats
!= NULL
))
447 return dev
->wireless_handlers
->get_wireless_stats(dev
);
449 /* Old location, will be phased out in next WE */
450 return (dev
->get_wireless_stats
?
451 dev
->get_wireless_stats(dev
) :
452 (struct iw_statistics
*) NULL
);
455 /* ---------------------------------------------------------------- */
457 * Call the commit handler in the driver
458 * (if exist and if conditions are right)
460 * Note : our current commit strategy is currently pretty dumb,
461 * but we will be able to improve on that...
462 * The goal is to try to agreagate as many changes as possible
463 * before doing the commit. Drivers that will define a commit handler
464 * are usually those that need a reset after changing parameters, so
465 * we want to minimise the number of reset.
466 * A cool idea is to use a timer : at each "set" command, we re-set the
467 * timer, when the timer eventually fires, we call the driver.
468 * Hopefully, more on that later.
470 * Also, I'm waiting to see how many people will complain about the
471 * netif_running(dev) test. I'm open on that one...
472 * Hopefully, the driver will remember to do a commit in "open()" ;-)
474 static inline int call_commit_handler(struct net_device
* dev
)
476 if((netif_running(dev
)) &&
477 (dev
->wireless_handlers
->standard
[0] != NULL
)) {
478 /* Call the commit handler on the driver */
479 return dev
->wireless_handlers
->standard
[0](dev
, NULL
,
482 return 0; /* Command completed successfully */
485 /* ---------------------------------------------------------------- */
487 * Calculate size of private arguments
489 static inline int get_priv_size(__u16 args
)
491 int num
= args
& IW_PRIV_SIZE_MASK
;
492 int type
= (args
& IW_PRIV_TYPE_MASK
) >> 12;
494 return num
* iw_priv_type_size
[type
];
497 /* ---------------------------------------------------------------- */
499 * Re-calculate the size of private arguments
501 static inline int adjust_priv_size(__u16 args
,
502 union iwreq_data
* wrqu
)
504 int num
= wrqu
->data
.length
;
505 int max
= args
& IW_PRIV_SIZE_MASK
;
506 int type
= (args
& IW_PRIV_TYPE_MASK
) >> 12;
508 /* Make sure the driver doesn't goof up */
512 return num
* iw_priv_type_size
[type
];
516 /******************** /proc/net/wireless SUPPORT ********************/
518 * The /proc/net/wireless file is a human readable user-space interface
519 * exporting various wireless specific statistics from the wireless devices.
520 * This is the most popular part of the Wireless Extensions ;-)
522 * This interface is a pure clone of /proc/net/dev (in net/core/dev.c).
523 * The content of the file is basically the content of "struct iw_statistics".
526 #ifdef CONFIG_PROC_FS
528 /* ---------------------------------------------------------------- */
530 * Print one entry (line) of /proc/net/wireless
532 static __inline__
void wireless_seq_printf_stats(struct seq_file
*seq
,
533 struct net_device
*dev
)
535 /* Get stats from the driver */
536 struct iw_statistics
*stats
= get_wireless_stats(dev
);
539 seq_printf(seq
, "%6s: %04x %3d%c %3d%c %3d%c %6d %6d %6d "
541 dev
->name
, stats
->status
, stats
->qual
.qual
,
542 stats
->qual
.updated
& IW_QUAL_QUAL_UPDATED
544 ((__u8
) stats
->qual
.level
),
545 stats
->qual
.updated
& IW_QUAL_LEVEL_UPDATED
547 ((__u8
) stats
->qual
.noise
),
548 stats
->qual
.updated
& IW_QUAL_NOISE_UPDATED
550 stats
->discard
.nwid
, stats
->discard
.code
,
551 stats
->discard
.fragment
, stats
->discard
.retries
,
552 stats
->discard
.misc
, stats
->miss
.beacon
);
553 stats
->qual
.updated
= 0;
557 /* ---------------------------------------------------------------- */
559 * Print info for /proc/net/wireless (print all entries)
561 static int wireless_seq_show(struct seq_file
*seq
, void *v
)
563 if (v
== SEQ_START_TOKEN
)
564 seq_printf(seq
, "Inter-| sta-| Quality | Discarded "
565 "packets | Missed | WE\n"
566 " face | tus | link level noise | nwid "
567 "crypt frag retry misc | beacon | %d\n",
570 wireless_seq_printf_stats(seq
, v
);
574 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
575 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
576 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
578 static struct seq_operations wireless_seq_ops
= {
579 .start
= dev_seq_start
,
580 .next
= dev_seq_next
,
581 .stop
= dev_seq_stop
,
582 .show
= wireless_seq_show
,
585 static int wireless_seq_open(struct inode
*inode
, struct file
*file
)
587 return seq_open(file
, &wireless_seq_ops
);
590 static struct file_operations wireless_seq_fops
= {
591 .owner
= THIS_MODULE
,
592 .open
= wireless_seq_open
,
595 .release
= seq_release
,
598 int __init
wireless_proc_init(void)
600 if (!proc_net_fops_create("wireless", S_IRUGO
, &wireless_seq_fops
))
605 #endif /* CONFIG_PROC_FS */
607 /************************** IOCTL SUPPORT **************************/
609 * The original user space API to configure all those Wireless Extensions
611 * In there, we check if we need to call the new driver API (iw_handler)
612 * or just call the driver ioctl handler.
615 /* ---------------------------------------------------------------- */
617 * Allow programatic access to /proc/net/wireless even if /proc
618 * doesn't exist... Also more efficient...
620 static inline int dev_iwstats(struct net_device
*dev
, struct ifreq
*ifr
)
622 /* Get stats from the driver */
623 struct iw_statistics
*stats
;
625 stats
= get_wireless_stats(dev
);
626 if (stats
!= (struct iw_statistics
*) NULL
) {
627 struct iwreq
* wrq
= (struct iwreq
*)ifr
;
629 /* Copy statistics to the user buffer */
630 if(copy_to_user(wrq
->u
.data
.pointer
, stats
,
631 sizeof(struct iw_statistics
)))
634 /* Check if we need to clear the update flag */
635 if(wrq
->u
.data
.flags
!= 0)
636 stats
->qual
.updated
= 0;
642 /* ---------------------------------------------------------------- */
644 * Export the driver private handler definition
645 * They will be picked up by tools like iwpriv...
647 static inline int ioctl_export_private(struct net_device
* dev
,
650 struct iwreq
* iwr
= (struct iwreq
*) ifr
;
652 /* Check if the driver has something to export */
653 if((dev
->wireless_handlers
->num_private_args
== 0) ||
654 (dev
->wireless_handlers
->private_args
== NULL
))
657 /* Check NULL pointer */
658 if(iwr
->u
.data
.pointer
== NULL
)
661 /* Check if there is enough buffer up there */
662 if(iwr
->u
.data
.length
< dev
->wireless_handlers
->num_private_args
) {
663 /* User space can't know in advance how large the buffer
664 * needs to be. Give it a hint, so that we can support
665 * any size buffer we want somewhat efficiently... */
666 iwr
->u
.data
.length
= dev
->wireless_handlers
->num_private_args
;
670 /* Set the number of available ioctls. */
671 iwr
->u
.data
.length
= dev
->wireless_handlers
->num_private_args
;
673 /* Copy structure to the user buffer. */
674 if (copy_to_user(iwr
->u
.data
.pointer
,
675 dev
->wireless_handlers
->private_args
,
676 sizeof(struct iw_priv_args
) * iwr
->u
.data
.length
))
682 /* ---------------------------------------------------------------- */
684 * Wrapper to call a standard Wireless Extension handler.
685 * We do various checks and also take care of moving data between
686 * user space and kernel space.
688 static inline int ioctl_standard_call(struct net_device
* dev
,
693 struct iwreq
* iwr
= (struct iwreq
*) ifr
;
694 const struct iw_ioctl_description
* descr
;
695 struct iw_request_info info
;
698 /* Get the description of the IOCTL */
699 if((cmd
- SIOCIWFIRST
) >= standard_ioctl_num
)
701 descr
= &(standard_ioctl
[cmd
- SIOCIWFIRST
]);
703 #ifdef WE_IOCTL_DEBUG
704 printk(KERN_DEBUG
"%s (WE) : Found standard handler for 0x%04X\n",
706 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
);
707 #endif /* WE_IOCTL_DEBUG */
709 /* Prepare the call */
713 /* Check if we have a pointer to user space data or not */
714 if(descr
->header_type
!= IW_HEADER_TYPE_POINT
) {
716 /* No extra arguments. Trivial to handle */
717 ret
= handler(dev
, &info
, &(iwr
->u
), NULL
);
720 /* Generate an event to notify listeners of the change */
721 if((descr
->flags
& IW_DESCR_FLAG_EVENT
) &&
722 ((ret
== 0) || (ret
== -EIWCOMMIT
)))
723 wireless_send_event(dev
, cmd
, &(iwr
->u
), NULL
);
724 #endif /* WE_SET_EVENT */
731 /* Calculate space needed by arguments. Always allocate
732 * for max space. Easier, and won't last long... */
733 extra_size
= descr
->max_tokens
* descr
->token_size
;
735 /* Check what user space is giving us */
737 /* Check NULL pointer */
738 if((iwr
->u
.data
.pointer
== NULL
) &&
739 (iwr
->u
.data
.length
!= 0))
741 /* Check if number of token fits within bounds */
742 if(iwr
->u
.data
.length
> descr
->max_tokens
)
744 if(iwr
->u
.data
.length
< descr
->min_tokens
)
747 /* Check NULL pointer */
748 if(iwr
->u
.data
.pointer
== NULL
)
750 /* Save user space buffer size for checking */
751 user_length
= iwr
->u
.data
.length
;
753 /* Don't check if user_length > max to allow forward
754 * compatibility. The test user_length < min is
755 * implied by the test at the end. */
757 /* Support for very large requests */
758 if((descr
->flags
& IW_DESCR_FLAG_NOMAX
) &&
759 (user_length
> descr
->max_tokens
)) {
760 /* Allow userspace to GET more than max so
761 * we can support any size GET requests.
762 * There is still a limit : -ENOMEM. */
763 extra_size
= user_length
* descr
->token_size
;
764 /* Note : user_length is originally a __u16,
765 * and token_size is controlled by us,
766 * so extra_size won't get negative and
767 * won't overflow... */
771 #ifdef WE_IOCTL_DEBUG
772 printk(KERN_DEBUG
"%s (WE) : Malloc %d bytes\n",
773 dev
->name
, extra_size
);
774 #endif /* WE_IOCTL_DEBUG */
776 /* Create the kernel buffer */
777 extra
= kmalloc(extra_size
, GFP_KERNEL
);
782 /* If it is a SET, get all the extra data in here */
783 if(IW_IS_SET(cmd
) && (iwr
->u
.data
.length
!= 0)) {
784 err
= copy_from_user(extra
, iwr
->u
.data
.pointer
,
791 #ifdef WE_IOCTL_DEBUG
792 printk(KERN_DEBUG
"%s (WE) : Got %d bytes\n",
794 iwr
->u
.data
.length
* descr
->token_size
);
795 #endif /* WE_IOCTL_DEBUG */
798 /* Call the handler */
799 ret
= handler(dev
, &info
, &(iwr
->u
), extra
);
801 /* If we have something to return to the user */
802 if (!ret
&& IW_IS_GET(cmd
)) {
803 /* Check if there is enough buffer up there */
804 if(user_length
< iwr
->u
.data
.length
) {
809 err
= copy_to_user(iwr
->u
.data
.pointer
, extra
,
814 #ifdef WE_IOCTL_DEBUG
815 printk(KERN_DEBUG
"%s (WE) : Wrote %d bytes\n",
817 iwr
->u
.data
.length
* descr
->token_size
);
818 #endif /* WE_IOCTL_DEBUG */
822 /* Generate an event to notify listeners of the change */
823 if((descr
->flags
& IW_DESCR_FLAG_EVENT
) &&
824 ((ret
== 0) || (ret
== -EIWCOMMIT
))) {
825 if(descr
->flags
& IW_DESCR_FLAG_RESTRICT
)
826 /* If the event is restricted, don't
827 * export the payload */
828 wireless_send_event(dev
, cmd
, &(iwr
->u
), NULL
);
830 wireless_send_event(dev
, cmd
, &(iwr
->u
),
833 #endif /* WE_SET_EVENT */
835 /* Cleanup - I told you it wasn't that long ;-) */
839 /* Call commit handler if needed and defined */
840 if(ret
== -EIWCOMMIT
)
841 ret
= call_commit_handler(dev
);
843 /* Here, we will generate the appropriate event if needed */
848 /* ---------------------------------------------------------------- */
850 * Wrapper to call a private Wireless Extension handler.
851 * We do various checks and also take care of moving data between
852 * user space and kernel space.
853 * It's not as nice and slimline as the standard wrapper. The cause
854 * is struct iw_priv_args, which was not really designed for the
855 * job we are going here.
857 * IMPORTANT : This function prevent to set and get data on the same
858 * IOCTL and enforce the SET/GET convention. Not doing it would be
860 * If you need to set and get data at the same time, please don't use
861 * a iw_handler but process it in your ioctl handler (i.e. use the
864 static inline int ioctl_private_call(struct net_device
* dev
,
869 struct iwreq
* iwr
= (struct iwreq
*) ifr
;
870 const struct iw_priv_args
* descr
= NULL
;
871 struct iw_request_info info
;
876 /* Get the description of the IOCTL */
877 for(i
= 0; i
< dev
->wireless_handlers
->num_private_args
; i
++)
878 if(cmd
== dev
->wireless_handlers
->private_args
[i
].cmd
) {
879 descr
= &(dev
->wireless_handlers
->private_args
[i
]);
883 #ifdef WE_IOCTL_DEBUG
884 printk(KERN_DEBUG
"%s (WE) : Found private handler for 0x%04X\n",
887 printk(KERN_DEBUG
"%s (WE) : Name %s, set %X, get %X\n",
888 dev
->name
, descr
->name
,
889 descr
->set_args
, descr
->get_args
);
891 #endif /* WE_IOCTL_DEBUG */
893 /* Compute the size of the set/get arguments */
896 int offset
= 0; /* For sub-ioctls */
897 /* Check for sub-ioctl handler */
898 if(descr
->name
[0] == '\0')
899 /* Reserve one int for sub-ioctl index */
900 offset
= sizeof(__u32
);
902 /* Size of set arguments */
903 extra_size
= get_priv_size(descr
->set_args
);
905 /* Does it fits in iwr ? */
906 if((descr
->set_args
& IW_PRIV_SIZE_FIXED
) &&
907 ((extra_size
+ offset
) <= IFNAMSIZ
))
910 /* Size of get arguments */
911 extra_size
= get_priv_size(descr
->get_args
);
913 /* Does it fits in iwr ? */
914 if((descr
->get_args
& IW_PRIV_SIZE_FIXED
) &&
915 (extra_size
<= IFNAMSIZ
))
920 /* Prepare the call */
924 /* Check if we have a pointer to user space data or not. */
925 if(extra_size
== 0) {
926 /* No extra arguments. Trivial to handle */
927 ret
= handler(dev
, &info
, &(iwr
->u
), (char *) &(iwr
->u
));
932 /* Check what user space is giving us */
934 /* Check NULL pointer */
935 if((iwr
->u
.data
.pointer
== NULL
) &&
936 (iwr
->u
.data
.length
!= 0))
939 /* Does it fits within bounds ? */
940 if(iwr
->u
.data
.length
> (descr
->set_args
&
944 /* Check NULL pointer */
945 if(iwr
->u
.data
.pointer
== NULL
)
949 #ifdef WE_IOCTL_DEBUG
950 printk(KERN_DEBUG
"%s (WE) : Malloc %d bytes\n",
951 dev
->name
, extra_size
);
952 #endif /* WE_IOCTL_DEBUG */
954 /* Always allocate for max space. Easier, and won't last
956 extra
= kmalloc(extra_size
, GFP_KERNEL
);
961 /* If it is a SET, get all the extra data in here */
962 if(IW_IS_SET(cmd
) && (iwr
->u
.data
.length
!= 0)) {
963 err
= copy_from_user(extra
, iwr
->u
.data
.pointer
,
969 #ifdef WE_IOCTL_DEBUG
970 printk(KERN_DEBUG
"%s (WE) : Got %d elem\n",
971 dev
->name
, iwr
->u
.data
.length
);
972 #endif /* WE_IOCTL_DEBUG */
975 /* Call the handler */
976 ret
= handler(dev
, &info
, &(iwr
->u
), extra
);
978 /* If we have something to return to the user */
979 if (!ret
&& IW_IS_GET(cmd
)) {
981 /* Adjust for the actual length if it's variable,
982 * avoid leaking kernel bits outside. */
983 if (!(descr
->get_args
& IW_PRIV_SIZE_FIXED
)) {
984 extra_size
= adjust_priv_size(descr
->get_args
,
988 err
= copy_to_user(iwr
->u
.data
.pointer
, extra
,
992 #ifdef WE_IOCTL_DEBUG
993 printk(KERN_DEBUG
"%s (WE) : Wrote %d elem\n",
994 dev
->name
, iwr
->u
.data
.length
);
995 #endif /* WE_IOCTL_DEBUG */
998 /* Cleanup - I told you it wasn't that long ;-) */
1003 /* Call commit handler if needed and defined */
1004 if(ret
== -EIWCOMMIT
)
1005 ret
= call_commit_handler(dev
);
1010 /* ---------------------------------------------------------------- */
1012 * Main IOCTl dispatcher. Called from the main networking code
1013 * (dev_ioctl() in net/core/dev.c).
1014 * Check the type of IOCTL and call the appropriate wrapper...
1016 int wireless_process_ioctl(struct ifreq
*ifr
, unsigned int cmd
)
1018 struct net_device
*dev
;
1021 /* Permissions are already checked in dev_ioctl() before calling us.
1022 * The copy_to/from_user() of ifr is also dealt with in there */
1024 /* Make sure the device exist */
1025 if ((dev
= __dev_get_by_name(ifr
->ifr_name
)) == NULL
)
1028 /* A bunch of special cases, then the generic case...
1029 * Note that 'cmd' is already filtered in dev_ioctl() with
1030 * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */
1034 /* Get Wireless Stats */
1035 return dev_iwstats(dev
, ifr
);
1038 /* Check if we have some wireless handlers defined */
1039 if(dev
->wireless_handlers
!= NULL
) {
1040 /* We export to user space the definition of
1041 * the private handler ourselves */
1042 return ioctl_export_private(dev
, ifr
);
1044 // ## Fall-through for old API ##
1048 if (!netif_device_present(dev
))
1050 /* New driver API : try to find the handler */
1051 handler
= get_handler(dev
, cmd
);
1052 if(handler
!= NULL
) {
1053 /* Standard and private are not the same */
1054 if(cmd
< SIOCIWFIRSTPRIV
)
1055 return ioctl_standard_call(dev
,
1060 return ioctl_private_call(dev
,
1065 /* Old driver API : call driver ioctl handler */
1066 if (dev
->do_ioctl
) {
1067 return dev
->do_ioctl(dev
, ifr
, cmd
);
1075 /************************* EVENT PROCESSING *************************/
1077 * Process events generated by the wireless layer or the driver.
1078 * Most often, the event will be propagated through rtnetlink
1081 #ifdef WE_EVENT_NETLINK
1082 /* "rtnl" is defined in net/core/rtnetlink.c, but we need it here.
1083 * It is declared in <linux/rtnetlink.h> */
1085 /* ---------------------------------------------------------------- */
1087 * Fill a rtnetlink message with our event data.
1088 * Note that we propage only the specified event and don't dump the
1089 * current wireless config. Dumping the wireless config is far too
1090 * expensive (for each parameter, the driver need to query the hardware).
1092 static inline int rtnetlink_fill_iwinfo(struct sk_buff
* skb
,
1093 struct net_device
* dev
,
1098 struct ifinfomsg
*r
;
1099 struct nlmsghdr
*nlh
;
1100 unsigned char *b
= skb
->tail
;
1102 nlh
= NLMSG_PUT(skb
, 0, 0, type
, sizeof(*r
));
1103 r
= NLMSG_DATA(nlh
);
1104 r
->ifi_family
= AF_UNSPEC
;
1106 r
->ifi_type
= dev
->type
;
1107 r
->ifi_index
= dev
->ifindex
;
1108 r
->ifi_flags
= dev
->flags
;
1109 r
->ifi_change
= 0; /* Wireless changes don't affect those flags */
1111 /* Add the wireless events in the netlink packet */
1112 RTA_PUT(skb
, IFLA_WIRELESS
,
1115 nlh
->nlmsg_len
= skb
->tail
- b
;
1120 skb_trim(skb
, b
- skb
->data
);
1124 /* ---------------------------------------------------------------- */
1126 * Create and broadcast and send it on the standard rtnetlink socket
1127 * This is a pure clone rtmsg_ifinfo() in net/core/rtnetlink.c
1128 * Andrzej Krzysztofowicz mandated that I used a IFLA_XXX field
1129 * within a RTM_NEWLINK event.
1131 static inline void rtmsg_iwinfo(struct net_device
* dev
,
1135 struct sk_buff
*skb
;
1136 int size
= NLMSG_GOODSIZE
;
1138 skb
= alloc_skb(size
, GFP_ATOMIC
);
1142 if (rtnetlink_fill_iwinfo(skb
, dev
, RTM_NEWLINK
,
1143 event
, event_len
) < 0) {
1147 NETLINK_CB(skb
).dst_group
= RTNLGRP_LINK
;
1148 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_LINK
, GFP_ATOMIC
);
1150 #endif /* WE_EVENT_NETLINK */
1152 /* ---------------------------------------------------------------- */
1154 * Main event dispatcher. Called from other parts and drivers.
1155 * Send the event on the appropriate channels.
1156 * May be called from interrupt context.
1158 void wireless_send_event(struct net_device
* dev
,
1160 union iwreq_data
* wrqu
,
1163 const struct iw_ioctl_description
* descr
= NULL
;
1165 struct iw_event
*event
; /* Mallocated whole event */
1166 int event_len
; /* Its size */
1167 int hdr_len
; /* Size of the event header */
1168 /* Don't "optimise" the following variable, it will crash */
1169 unsigned cmd_index
; /* *MUST* be unsigned */
1171 /* Get the description of the IOCTL */
1172 if(cmd
<= SIOCIWLAST
) {
1173 cmd_index
= cmd
- SIOCIWFIRST
;
1174 if(cmd_index
< standard_ioctl_num
)
1175 descr
= &(standard_ioctl
[cmd_index
]);
1177 cmd_index
= cmd
- IWEVFIRST
;
1178 if(cmd_index
< standard_event_num
)
1179 descr
= &(standard_event
[cmd_index
]);
1181 /* Don't accept unknown events */
1183 /* Note : we don't return an error to the driver, because
1184 * the driver would not know what to do about it. It can't
1185 * return an error to the user, because the event is not
1186 * initiated by a user request.
1187 * The best the driver could do is to log an error message.
1188 * We will do it ourselves instead...
1190 printk(KERN_ERR
"%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n",
1194 #ifdef WE_EVENT_DEBUG
1195 printk(KERN_DEBUG
"%s (WE) : Got event 0x%04X\n",
1197 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
);
1198 #endif /* WE_EVENT_DEBUG */
1200 /* Check extra parameters and set extra_len */
1201 if(descr
->header_type
== IW_HEADER_TYPE_POINT
) {
1202 /* Check if number of token fits within bounds */
1203 if(wrqu
->data
.length
> descr
->max_tokens
) {
1204 printk(KERN_ERR
"%s (WE) : Wireless Event too big (%d)\n", dev
->name
, wrqu
->data
.length
);
1207 if(wrqu
->data
.length
< descr
->min_tokens
) {
1208 printk(KERN_ERR
"%s (WE) : Wireless Event too small (%d)\n", dev
->name
, wrqu
->data
.length
);
1211 /* Calculate extra_len - extra is NULL for restricted events */
1213 extra_len
= wrqu
->data
.length
* descr
->token_size
;
1214 #ifdef WE_EVENT_DEBUG
1215 printk(KERN_DEBUG
"%s (WE) : Event 0x%04X, tokens %d, extra_len %d\n", dev
->name
, cmd
, wrqu
->data
.length
, extra_len
);
1216 #endif /* WE_EVENT_DEBUG */
1219 /* Total length of the event */
1220 hdr_len
= event_type_size
[descr
->header_type
];
1221 event_len
= hdr_len
+ extra_len
;
1223 #ifdef WE_EVENT_DEBUG
1224 printk(KERN_DEBUG
"%s (WE) : Event 0x%04X, hdr_len %d, event_len %d\n", dev
->name
, cmd
, hdr_len
, event_len
);
1225 #endif /* WE_EVENT_DEBUG */
1227 /* Create temporary buffer to hold the event */
1228 event
= kmalloc(event_len
, GFP_ATOMIC
);
1233 event
->len
= event_len
;
1235 memcpy(&event
->u
, wrqu
, hdr_len
- IW_EV_LCP_LEN
);
1237 memcpy(((char *) event
) + hdr_len
, extra
, extra_len
);
1239 #ifdef WE_EVENT_NETLINK
1240 /* rtnetlink event channel */
1241 rtmsg_iwinfo(dev
, (char *) event
, event_len
);
1242 #endif /* WE_EVENT_NETLINK */
1247 return; /* Always success, I guess ;-) */
1250 /********************** ENHANCED IWSPY SUPPORT **********************/
1252 * In the old days, the driver was handling spy support all by itself.
1253 * Now, the driver can delegate this task to Wireless Extensions.
1254 * It needs to use those standard spy iw_handler in struct iw_handler_def,
1255 * push data to us via wireless_spy_update() and include struct iw_spy_data
1256 * in its private part (and advertise it in iw_handler_def->spy_offset).
1257 * One of the main advantage of centralising spy support here is that
1258 * it becomes much easier to improve and extend it without having to touch
1259 * the drivers. One example is the addition of the Spy-Threshold events.
1262 /* ---------------------------------------------------------------- */
1264 * Return the pointer to the spy data in the driver.
1265 * Because this is called on the Rx path via wireless_spy_update(),
1266 * we want it to be efficient...
1268 static inline struct iw_spy_data
* get_spydata(struct net_device
*dev
)
1270 /* This is the new way */
1271 if(dev
->wireless_data
)
1272 return(dev
->wireless_data
->spy_data
);
1274 /* This is the old way. Doesn't work for multi-headed drivers.
1275 * It will be removed in the next version of WE. */
1276 return (dev
->priv
+ dev
->wireless_handlers
->spy_offset
);
1279 /*------------------------------------------------------------------*/
1281 * Standard Wireless Handler : set Spy List
1283 int iw_handler_set_spy(struct net_device
* dev
,
1284 struct iw_request_info
* info
,
1285 union iwreq_data
* wrqu
,
1288 struct iw_spy_data
* spydata
= get_spydata(dev
);
1289 struct sockaddr
* address
= (struct sockaddr
*) extra
;
1291 if(!dev
->wireless_data
)
1292 /* Help user know that driver needs updating */
1293 printk(KERN_DEBUG
"%s (WE) : Driver using old/buggy spy support, please fix driver !\n",
1295 /* Make sure driver is not buggy or using the old API */
1299 /* Disable spy collection while we copy the addresses.
1300 * While we copy addresses, any call to wireless_spy_update()
1301 * will NOP. This is OK, as anyway the addresses are changing. */
1302 spydata
->spy_number
= 0;
1304 /* We want to operate without locking, because wireless_spy_update()
1305 * most likely will happen in the interrupt handler, and therefore
1306 * have its own locking constraints and needs performance.
1307 * The rtnl_lock() make sure we don't race with the other iw_handlers.
1308 * This make sure wireless_spy_update() "see" that the spy list
1309 * is temporarily disabled. */
1312 /* Are there are addresses to copy? */
1313 if(wrqu
->data
.length
> 0) {
1316 /* Copy addresses */
1317 for(i
= 0; i
< wrqu
->data
.length
; i
++)
1318 memcpy(spydata
->spy_address
[i
], address
[i
].sa_data
,
1321 memset(spydata
->spy_stat
, 0,
1322 sizeof(struct iw_quality
) * IW_MAX_SPY
);
1325 printk(KERN_DEBUG
"iw_handler_set_spy() : offset %ld, spydata %p, num %d\n", dev
->wireless_handlers
->spy_offset
, spydata
, wrqu
->data
.length
);
1326 for (i
= 0; i
< wrqu
->data
.length
; i
++)
1328 "%02X:%02X:%02X:%02X:%02X:%02X \n",
1329 spydata
->spy_address
[i
][0],
1330 spydata
->spy_address
[i
][1],
1331 spydata
->spy_address
[i
][2],
1332 spydata
->spy_address
[i
][3],
1333 spydata
->spy_address
[i
][4],
1334 spydata
->spy_address
[i
][5]);
1335 #endif /* WE_SPY_DEBUG */
1338 /* Make sure above is updated before re-enabling */
1341 /* Enable addresses */
1342 spydata
->spy_number
= wrqu
->data
.length
;
1347 /*------------------------------------------------------------------*/
1349 * Standard Wireless Handler : get Spy List
1351 int iw_handler_get_spy(struct net_device
* dev
,
1352 struct iw_request_info
* info
,
1353 union iwreq_data
* wrqu
,
1356 struct iw_spy_data
* spydata
= get_spydata(dev
);
1357 struct sockaddr
* address
= (struct sockaddr
*) extra
;
1360 /* Make sure driver is not buggy or using the old API */
1364 wrqu
->data
.length
= spydata
->spy_number
;
1366 /* Copy addresses. */
1367 for(i
= 0; i
< spydata
->spy_number
; i
++) {
1368 memcpy(address
[i
].sa_data
, spydata
->spy_address
[i
], ETH_ALEN
);
1369 address
[i
].sa_family
= AF_UNIX
;
1371 /* Copy stats to the user buffer (just after). */
1372 if(spydata
->spy_number
> 0)
1373 memcpy(extra
+ (sizeof(struct sockaddr
) *spydata
->spy_number
),
1375 sizeof(struct iw_quality
) * spydata
->spy_number
);
1376 /* Reset updated flags. */
1377 for(i
= 0; i
< spydata
->spy_number
; i
++)
1378 spydata
->spy_stat
[i
].updated
= 0;
1382 /*------------------------------------------------------------------*/
1384 * Standard Wireless Handler : set spy threshold
1386 int iw_handler_set_thrspy(struct net_device
* dev
,
1387 struct iw_request_info
*info
,
1388 union iwreq_data
* wrqu
,
1391 struct iw_spy_data
* spydata
= get_spydata(dev
);
1392 struct iw_thrspy
* threshold
= (struct iw_thrspy
*) extra
;
1394 /* Make sure driver is not buggy or using the old API */
1399 memcpy(&(spydata
->spy_thr_low
), &(threshold
->low
),
1400 2 * sizeof(struct iw_quality
));
1403 memset(spydata
->spy_thr_under
, '\0', sizeof(spydata
->spy_thr_under
));
1406 printk(KERN_DEBUG
"iw_handler_set_thrspy() : low %d ; high %d\n", spydata
->spy_thr_low
.level
, spydata
->spy_thr_high
.level
);
1407 #endif /* WE_SPY_DEBUG */
1412 /*------------------------------------------------------------------*/
1414 * Standard Wireless Handler : get spy threshold
1416 int iw_handler_get_thrspy(struct net_device
* dev
,
1417 struct iw_request_info
*info
,
1418 union iwreq_data
* wrqu
,
1421 struct iw_spy_data
* spydata
= get_spydata(dev
);
1422 struct iw_thrspy
* threshold
= (struct iw_thrspy
*) extra
;
1424 /* Make sure driver is not buggy or using the old API */
1429 memcpy(&(threshold
->low
), &(spydata
->spy_thr_low
),
1430 2 * sizeof(struct iw_quality
));
1435 /*------------------------------------------------------------------*/
1437 * Prepare and send a Spy Threshold event
1439 static void iw_send_thrspy_event(struct net_device
* dev
,
1440 struct iw_spy_data
* spydata
,
1441 unsigned char * address
,
1442 struct iw_quality
* wstats
)
1444 union iwreq_data wrqu
;
1445 struct iw_thrspy threshold
;
1448 wrqu
.data
.length
= 1;
1449 wrqu
.data
.flags
= 0;
1451 memcpy(threshold
.addr
.sa_data
, address
, ETH_ALEN
);
1452 threshold
.addr
.sa_family
= ARPHRD_ETHER
;
1454 memcpy(&(threshold
.qual
), wstats
, sizeof(struct iw_quality
));
1455 /* Copy also thresholds */
1456 memcpy(&(threshold
.low
), &(spydata
->spy_thr_low
),
1457 2 * sizeof(struct iw_quality
));
1460 printk(KERN_DEBUG
"iw_send_thrspy_event() : address %02X:%02X:%02X:%02X:%02X:%02X, level %d, up = %d\n",
1461 threshold
.addr
.sa_data
[0],
1462 threshold
.addr
.sa_data
[1],
1463 threshold
.addr
.sa_data
[2],
1464 threshold
.addr
.sa_data
[3],
1465 threshold
.addr
.sa_data
[4],
1466 threshold
.addr
.sa_data
[5], threshold
.qual
.level
);
1467 #endif /* WE_SPY_DEBUG */
1469 /* Send event to user space */
1470 wireless_send_event(dev
, SIOCGIWTHRSPY
, &wrqu
, (char *) &threshold
);
1473 /* ---------------------------------------------------------------- */
1475 * Call for the driver to update the spy data.
1476 * For now, the spy data is a simple array. As the size of the array is
1477 * small, this is good enough. If we wanted to support larger number of
1478 * spy addresses, we should use something more efficient...
1480 void wireless_spy_update(struct net_device
* dev
,
1481 unsigned char * address
,
1482 struct iw_quality
* wstats
)
1484 struct iw_spy_data
* spydata
= get_spydata(dev
);
1488 /* Make sure driver is not buggy or using the old API */
1493 printk(KERN_DEBUG
"wireless_spy_update() : offset %ld, spydata %p, address %02X:%02X:%02X:%02X:%02X:%02X\n", dev
->wireless_handlers
->spy_offset
, spydata
, address
[0], address
[1], address
[2], address
[3], address
[4], address
[5]);
1494 #endif /* WE_SPY_DEBUG */
1496 /* Update all records that match */
1497 for(i
= 0; i
< spydata
->spy_number
; i
++)
1498 if(!memcmp(address
, spydata
->spy_address
[i
], ETH_ALEN
)) {
1499 memcpy(&(spydata
->spy_stat
[i
]), wstats
,
1500 sizeof(struct iw_quality
));
1504 /* Generate an event if we cross the spy threshold.
1505 * To avoid event storms, we have a simple hysteresis : we generate
1506 * event only when we go under the low threshold or above the
1507 * high threshold. */
1509 if(spydata
->spy_thr_under
[match
]) {
1510 if(wstats
->level
> spydata
->spy_thr_high
.level
) {
1511 spydata
->spy_thr_under
[match
] = 0;
1512 iw_send_thrspy_event(dev
, spydata
,
1516 if(wstats
->level
< spydata
->spy_thr_low
.level
) {
1517 spydata
->spy_thr_under
[match
] = 1;
1518 iw_send_thrspy_event(dev
, spydata
,
1525 EXPORT_SYMBOL(iw_handler_get_spy
);
1526 EXPORT_SYMBOL(iw_handler_get_thrspy
);
1527 EXPORT_SYMBOL(iw_handler_set_spy
);
1528 EXPORT_SYMBOL(iw_handler_set_thrspy
);
1529 EXPORT_SYMBOL(wireless_send_event
);
1530 EXPORT_SYMBOL(wireless_spy_update
);