2 * cfg80211 scan result handling
4 * Copyright 2008 Johannes Berg <johannes@sipsolutions.net>
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/netdevice.h>
9 #include <linux/wireless.h>
10 #include <linux/nl80211.h>
11 #include <linux/etherdevice.h>
13 #include <net/cfg80211.h>
14 #include <net/iw_handler.h>
18 #define IEEE80211_SCAN_RESULT_EXPIRE (15 * HZ)
20 void __cfg80211_scan_done(struct work_struct
*wk
)
22 struct cfg80211_registered_device
*rdev
;
23 struct cfg80211_scan_request
*request
;
24 struct net_device
*dev
;
25 #ifdef CONFIG_WIRELESS_EXT
26 union iwreq_data wrqu
;
29 rdev
= container_of(wk
, struct cfg80211_registered_device
,
32 mutex_lock(&rdev
->mtx
);
33 request
= rdev
->scan_req
;
38 * This must be before sending the other events!
39 * Otherwise, wpa_supplicant gets completely confused with
42 cfg80211_sme_scan_done(dev
);
45 nl80211_send_scan_aborted(wiphy_to_dev(request
->wiphy
), dev
);
47 nl80211_send_scan_done(wiphy_to_dev(request
->wiphy
), dev
);
49 #ifdef CONFIG_WIRELESS_EXT
50 if (!request
->aborted
) {
51 memset(&wrqu
, 0, sizeof(wrqu
));
53 wireless_send_event(dev
, SIOCGIWSCAN
, &wrqu
, NULL
);
59 cfg80211_unlock_rdev(rdev
);
60 wiphy_to_dev(request
->wiphy
)->scan_req
= NULL
;
64 void cfg80211_scan_done(struct cfg80211_scan_request
*request
, bool aborted
)
66 WARN_ON(request
!= wiphy_to_dev(request
->wiphy
)->scan_req
);
68 request
->aborted
= aborted
;
69 schedule_work(&wiphy_to_dev(request
->wiphy
)->scan_done_wk
);
71 EXPORT_SYMBOL(cfg80211_scan_done
);
73 static void bss_release(struct kref
*ref
)
75 struct cfg80211_internal_bss
*bss
;
77 bss
= container_of(ref
, struct cfg80211_internal_bss
, ref
);
78 if (bss
->pub
.free_priv
)
79 bss
->pub
.free_priv(&bss
->pub
);
81 if (bss
->ies_allocated
)
82 kfree(bss
->pub
.information_elements
);
84 BUG_ON(atomic_read(&bss
->hold
));
89 /* must hold dev->bss_lock! */
90 void cfg80211_bss_age(struct cfg80211_registered_device
*dev
,
91 unsigned long age_secs
)
93 struct cfg80211_internal_bss
*bss
;
94 unsigned long age_jiffies
= msecs_to_jiffies(age_secs
* MSEC_PER_SEC
);
96 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
97 bss
->ts
-= age_jiffies
;
101 /* must hold dev->bss_lock! */
102 void cfg80211_bss_expire(struct cfg80211_registered_device
*dev
)
104 struct cfg80211_internal_bss
*bss
, *tmp
;
105 bool expired
= false;
107 list_for_each_entry_safe(bss
, tmp
, &dev
->bss_list
, list
) {
108 if (atomic_read(&bss
->hold
))
110 if (!time_after(jiffies
, bss
->ts
+ IEEE80211_SCAN_RESULT_EXPIRE
))
112 list_del(&bss
->list
);
113 rb_erase(&bss
->rbn
, &dev
->bss_tree
);
114 kref_put(&bss
->ref
, bss_release
);
119 dev
->bss_generation
++;
122 static u8
*find_ie(u8 num
, u8
*ies
, size_t len
)
124 while (len
> 2 && ies
[0] != num
) {
130 if (len
< 2 + ies
[1])
135 static int cmp_ies(u8 num
, u8
*ies1
, size_t len1
, u8
*ies2
, size_t len2
)
137 const u8
*ie1
= find_ie(num
, ies1
, len1
);
138 const u8
*ie2
= find_ie(num
, ies2
, len2
);
146 r
= memcmp(ie1
+ 2, ie2
+ 2, min(ie1
[1], ie2
[1]));
147 if (r
== 0 && ie1
[1] != ie2
[1])
148 return ie2
[1] - ie1
[1];
152 static bool is_bss(struct cfg80211_bss
*a
,
154 const u8
*ssid
, size_t ssid_len
)
158 if (bssid
&& compare_ether_addr(a
->bssid
, bssid
))
164 ssidie
= find_ie(WLAN_EID_SSID
,
165 a
->information_elements
,
166 a
->len_information_elements
);
169 if (ssidie
[1] != ssid_len
)
171 return memcmp(ssidie
+ 2, ssid
, ssid_len
) == 0;
174 static bool is_mesh(struct cfg80211_bss
*a
,
175 const u8
*meshid
, size_t meshidlen
,
180 if (!is_zero_ether_addr(a
->bssid
))
183 ie
= find_ie(WLAN_EID_MESH_ID
,
184 a
->information_elements
,
185 a
->len_information_elements
);
188 if (ie
[1] != meshidlen
)
190 if (memcmp(ie
+ 2, meshid
, meshidlen
))
193 ie
= find_ie(WLAN_EID_MESH_CONFIG
,
194 a
->information_elements
,
195 a
->len_information_elements
);
196 if (ie
[1] != IEEE80211_MESH_CONFIG_LEN
)
200 * Ignore mesh capability (last two bytes of the IE) when
201 * comparing since that may differ between stations taking
202 * part in the same mesh.
204 return memcmp(ie
+ 2, meshcfg
, IEEE80211_MESH_CONFIG_LEN
- 2) == 0;
207 static int cmp_bss(struct cfg80211_bss
*a
,
208 struct cfg80211_bss
*b
)
212 if (a
->channel
!= b
->channel
)
213 return b
->channel
->center_freq
- a
->channel
->center_freq
;
215 r
= memcmp(a
->bssid
, b
->bssid
, ETH_ALEN
);
219 if (is_zero_ether_addr(a
->bssid
)) {
220 r
= cmp_ies(WLAN_EID_MESH_ID
,
221 a
->information_elements
,
222 a
->len_information_elements
,
223 b
->information_elements
,
224 b
->len_information_elements
);
227 return cmp_ies(WLAN_EID_MESH_CONFIG
,
228 a
->information_elements
,
229 a
->len_information_elements
,
230 b
->information_elements
,
231 b
->len_information_elements
);
234 return cmp_ies(WLAN_EID_SSID
,
235 a
->information_elements
,
236 a
->len_information_elements
,
237 b
->information_elements
,
238 b
->len_information_elements
);
241 struct cfg80211_bss
*cfg80211_get_bss(struct wiphy
*wiphy
,
242 struct ieee80211_channel
*channel
,
244 const u8
*ssid
, size_t ssid_len
,
245 u16 capa_mask
, u16 capa_val
)
247 struct cfg80211_registered_device
*dev
= wiphy_to_dev(wiphy
);
248 struct cfg80211_internal_bss
*bss
, *res
= NULL
;
250 spin_lock_bh(&dev
->bss_lock
);
252 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
253 if ((bss
->pub
.capability
& capa_mask
) != capa_val
)
255 if (channel
&& bss
->pub
.channel
!= channel
)
257 if (is_bss(&bss
->pub
, bssid
, ssid
, ssid_len
)) {
264 spin_unlock_bh(&dev
->bss_lock
);
269 EXPORT_SYMBOL(cfg80211_get_bss
);
271 struct cfg80211_bss
*cfg80211_get_mesh(struct wiphy
*wiphy
,
272 struct ieee80211_channel
*channel
,
273 const u8
*meshid
, size_t meshidlen
,
276 struct cfg80211_registered_device
*dev
= wiphy_to_dev(wiphy
);
277 struct cfg80211_internal_bss
*bss
, *res
= NULL
;
279 spin_lock_bh(&dev
->bss_lock
);
281 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
282 if (channel
&& bss
->pub
.channel
!= channel
)
284 if (is_mesh(&bss
->pub
, meshid
, meshidlen
, meshcfg
)) {
291 spin_unlock_bh(&dev
->bss_lock
);
296 EXPORT_SYMBOL(cfg80211_get_mesh
);
299 static void rb_insert_bss(struct cfg80211_registered_device
*dev
,
300 struct cfg80211_internal_bss
*bss
)
302 struct rb_node
**p
= &dev
->bss_tree
.rb_node
;
303 struct rb_node
*parent
= NULL
;
304 struct cfg80211_internal_bss
*tbss
;
309 tbss
= rb_entry(parent
, struct cfg80211_internal_bss
, rbn
);
311 cmp
= cmp_bss(&bss
->pub
, &tbss
->pub
);
314 /* will sort of leak this BSS */
324 rb_link_node(&bss
->rbn
, parent
, p
);
325 rb_insert_color(&bss
->rbn
, &dev
->bss_tree
);
328 static struct cfg80211_internal_bss
*
329 rb_find_bss(struct cfg80211_registered_device
*dev
,
330 struct cfg80211_internal_bss
*res
)
332 struct rb_node
*n
= dev
->bss_tree
.rb_node
;
333 struct cfg80211_internal_bss
*bss
;
337 bss
= rb_entry(n
, struct cfg80211_internal_bss
, rbn
);
338 r
= cmp_bss(&res
->pub
, &bss
->pub
);
351 static struct cfg80211_internal_bss
*
352 cfg80211_bss_update(struct cfg80211_registered_device
*dev
,
353 struct cfg80211_internal_bss
*res
,
356 struct cfg80211_internal_bss
*found
= NULL
;
357 const u8
*meshid
, *meshcfg
;
360 * The reference to "res" is donated to this function.
363 if (WARN_ON(!res
->pub
.channel
)) {
364 kref_put(&res
->ref
, bss_release
);
370 if (is_zero_ether_addr(res
->pub
.bssid
)) {
371 /* must be mesh, verify */
372 meshid
= find_ie(WLAN_EID_MESH_ID
, res
->pub
.information_elements
,
373 res
->pub
.len_information_elements
);
374 meshcfg
= find_ie(WLAN_EID_MESH_CONFIG
,
375 res
->pub
.information_elements
,
376 res
->pub
.len_information_elements
);
377 if (!meshid
|| !meshcfg
||
378 meshcfg
[1] != IEEE80211_MESH_CONFIG_LEN
) {
380 kref_put(&res
->ref
, bss_release
);
385 spin_lock_bh(&dev
->bss_lock
);
387 found
= rb_find_bss(dev
, res
);
390 found
->pub
.beacon_interval
= res
->pub
.beacon_interval
;
391 found
->pub
.tsf
= res
->pub
.tsf
;
392 found
->pub
.signal
= res
->pub
.signal
;
393 found
->pub
.capability
= res
->pub
.capability
;
398 size_t used
= dev
->wiphy
.bss_priv_size
+ sizeof(*res
);
399 size_t ielen
= res
->pub
.len_information_elements
;
401 if (!found
->ies_allocated
&& ksize(found
) >= used
+ ielen
) {
402 memcpy(found
->pub
.information_elements
,
403 res
->pub
.information_elements
, ielen
);
404 found
->pub
.len_information_elements
= ielen
;
406 u8
*ies
= found
->pub
.information_elements
;
408 if (found
->ies_allocated
)
409 ies
= krealloc(ies
, ielen
, GFP_ATOMIC
);
411 ies
= kmalloc(ielen
, GFP_ATOMIC
);
414 memcpy(ies
, res
->pub
.information_elements
, ielen
);
415 found
->ies_allocated
= true;
416 found
->pub
.information_elements
= ies
;
417 found
->pub
.len_information_elements
= ielen
;
422 kref_put(&res
->ref
, bss_release
);
424 /* this "consumes" the reference */
425 list_add_tail(&res
->list
, &dev
->bss_list
);
426 rb_insert_bss(dev
, res
);
430 dev
->bss_generation
++;
431 spin_unlock_bh(&dev
->bss_lock
);
433 kref_get(&found
->ref
);
438 cfg80211_inform_bss(struct wiphy
*wiphy
,
439 struct ieee80211_channel
*channel
,
441 u64 timestamp
, u16 capability
, u16 beacon_interval
,
442 const u8
*ie
, size_t ielen
,
443 s32 signal
, gfp_t gfp
)
445 struct cfg80211_internal_bss
*res
;
451 privsz
= wiphy
->bss_priv_size
;
453 if (WARN_ON(wiphy
->signal_type
== NL80211_BSS_SIGNAL_UNSPEC
&&
454 (signal
< 0 || signal
> 100)))
457 res
= kzalloc(sizeof(*res
) + privsz
+ ielen
, gfp
);
461 memcpy(res
->pub
.bssid
, bssid
, ETH_ALEN
);
462 res
->pub
.channel
= channel
;
463 res
->pub
.signal
= signal
;
464 res
->pub
.tsf
= timestamp
;
465 res
->pub
.beacon_interval
= beacon_interval
;
466 res
->pub
.capability
= capability
;
467 /* point to after the private area */
468 res
->pub
.information_elements
= (u8
*)res
+ sizeof(*res
) + privsz
;
469 memcpy(res
->pub
.information_elements
, ie
, ielen
);
470 res
->pub
.len_information_elements
= ielen
;
472 kref_init(&res
->ref
);
474 res
= cfg80211_bss_update(wiphy_to_dev(wiphy
), res
, 0);
478 if (res
->pub
.capability
& WLAN_CAPABILITY_ESS
)
479 regulatory_hint_found_beacon(wiphy
, channel
, gfp
);
481 /* cfg80211_bss_update gives us a referenced result */
484 EXPORT_SYMBOL(cfg80211_inform_bss
);
486 struct cfg80211_bss
*
487 cfg80211_inform_bss_frame(struct wiphy
*wiphy
,
488 struct ieee80211_channel
*channel
,
489 struct ieee80211_mgmt
*mgmt
, size_t len
,
490 s32 signal
, gfp_t gfp
)
492 struct cfg80211_internal_bss
*res
;
493 size_t ielen
= len
- offsetof(struct ieee80211_mgmt
,
494 u
.probe_resp
.variable
);
496 size_t privsz
= wiphy
->bss_priv_size
;
498 if (WARN_ON(wiphy
->signal_type
== NL80211_BSS_SIGNAL_UNSPEC
&&
499 (signal
< 0 || signal
> 100)))
502 if (WARN_ON(!mgmt
|| !wiphy
||
503 len
< offsetof(struct ieee80211_mgmt
, u
.probe_resp
.variable
)))
506 res
= kzalloc(sizeof(*res
) + privsz
+ ielen
, gfp
);
510 memcpy(res
->pub
.bssid
, mgmt
->bssid
, ETH_ALEN
);
511 res
->pub
.channel
= channel
;
512 res
->pub
.signal
= signal
;
513 res
->pub
.tsf
= le64_to_cpu(mgmt
->u
.probe_resp
.timestamp
);
514 res
->pub
.beacon_interval
= le16_to_cpu(mgmt
->u
.probe_resp
.beacon_int
);
515 res
->pub
.capability
= le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
);
516 /* point to after the private area */
517 res
->pub
.information_elements
= (u8
*)res
+ sizeof(*res
) + privsz
;
518 memcpy(res
->pub
.information_elements
, mgmt
->u
.probe_resp
.variable
, ielen
);
519 res
->pub
.len_information_elements
= ielen
;
521 kref_init(&res
->ref
);
523 overwrite
= ieee80211_is_probe_resp(mgmt
->frame_control
);
525 res
= cfg80211_bss_update(wiphy_to_dev(wiphy
), res
, overwrite
);
529 if (res
->pub
.capability
& WLAN_CAPABILITY_ESS
)
530 regulatory_hint_found_beacon(wiphy
, channel
, gfp
);
532 /* cfg80211_bss_update gives us a referenced result */
535 EXPORT_SYMBOL(cfg80211_inform_bss_frame
);
537 void cfg80211_put_bss(struct cfg80211_bss
*pub
)
539 struct cfg80211_internal_bss
*bss
;
544 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
545 kref_put(&bss
->ref
, bss_release
);
547 EXPORT_SYMBOL(cfg80211_put_bss
);
549 void cfg80211_unlink_bss(struct wiphy
*wiphy
, struct cfg80211_bss
*pub
)
551 struct cfg80211_registered_device
*dev
= wiphy_to_dev(wiphy
);
552 struct cfg80211_internal_bss
*bss
;
557 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
559 spin_lock_bh(&dev
->bss_lock
);
561 list_del(&bss
->list
);
562 rb_erase(&bss
->rbn
, &dev
->bss_tree
);
564 spin_unlock_bh(&dev
->bss_lock
);
566 kref_put(&bss
->ref
, bss_release
);
568 EXPORT_SYMBOL(cfg80211_unlink_bss
);
570 #ifdef CONFIG_WIRELESS_EXT
571 int cfg80211_wext_siwscan(struct net_device
*dev
,
572 struct iw_request_info
*info
,
573 union iwreq_data
*wrqu
, char *extra
)
575 struct cfg80211_registered_device
*rdev
;
577 struct iw_scan_req
*wreq
= NULL
;
578 struct cfg80211_scan_request
*creq
;
579 int i
, err
, n_channels
= 0;
580 enum ieee80211_band band
;
582 if (!netif_running(dev
))
585 rdev
= cfg80211_get_dev_from_ifindex(dev_net(dev
), dev
->ifindex
);
588 return PTR_ERR(rdev
);
590 if (rdev
->scan_req
) {
595 wiphy
= &rdev
->wiphy
;
597 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
598 if (wiphy
->bands
[band
])
599 n_channels
+= wiphy
->bands
[band
]->n_channels
;
601 creq
= kzalloc(sizeof(*creq
) + sizeof(struct cfg80211_ssid
) +
602 n_channels
* sizeof(void *),
611 creq
->ssids
= (void *)(creq
+ 1);
612 creq
->channels
= (void *)(creq
->ssids
+ 1);
613 creq
->n_channels
= n_channels
;
618 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
620 if (!wiphy
->bands
[band
])
622 for (j
= 0; j
< wiphy
->bands
[band
]->n_channels
; j
++) {
623 creq
->channels
[i
] = &wiphy
->bands
[band
]->channels
[j
];
628 /* translate scan request */
629 if (wrqu
->data
.length
== sizeof(struct iw_scan_req
)) {
630 wreq
= (struct iw_scan_req
*)extra
;
632 if (wrqu
->data
.flags
& IW_SCAN_THIS_ESSID
) {
633 if (wreq
->essid_len
> IEEE80211_MAX_SSID_LEN
)
635 memcpy(creq
->ssids
[0].ssid
, wreq
->essid
, wreq
->essid_len
);
636 creq
->ssids
[0].ssid_len
= wreq
->essid_len
;
638 if (wreq
->scan_type
== IW_SCAN_TYPE_PASSIVE
)
642 rdev
->scan_req
= creq
;
643 err
= rdev
->ops
->scan(wiphy
, dev
, creq
);
645 rdev
->scan_req
= NULL
;
648 nl80211_send_scan_start(rdev
, dev
);
652 cfg80211_unlock_rdev(rdev
);
655 EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan
);
657 static void ieee80211_scan_add_ies(struct iw_request_info
*info
,
658 struct cfg80211_bss
*bss
,
659 char **current_ev
, char *end_buf
)
661 u8
*pos
, *end
, *next
;
664 if (!bss
->information_elements
||
665 !bss
->len_information_elements
)
669 * If needed, fragment the IEs buffer (at IE boundaries) into short
670 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
672 pos
= bss
->information_elements
;
673 end
= pos
+ bss
->len_information_elements
;
675 while (end
- pos
> IW_GENERIC_IE_MAX
) {
676 next
= pos
+ 2 + pos
[1];
677 while (next
+ 2 + next
[1] - pos
< IW_GENERIC_IE_MAX
)
678 next
= next
+ 2 + next
[1];
680 memset(&iwe
, 0, sizeof(iwe
));
682 iwe
.u
.data
.length
= next
- pos
;
683 *current_ev
= iwe_stream_add_point(info
, *current_ev
,
690 memset(&iwe
, 0, sizeof(iwe
));
692 iwe
.u
.data
.length
= end
- pos
;
693 *current_ev
= iwe_stream_add_point(info
, *current_ev
,
698 static inline unsigned int elapsed_jiffies_msecs(unsigned long start
)
700 unsigned long end
= jiffies
;
703 return jiffies_to_msecs(end
- start
);
705 return jiffies_to_msecs(end
+ (MAX_JIFFY_OFFSET
- start
) + 1);
709 ieee80211_bss(struct wiphy
*wiphy
, struct iw_request_info
*info
,
710 struct cfg80211_internal_bss
*bss
, char *current_ev
,
715 u8
*ie
= bss
->pub
.information_elements
;
716 int rem
= bss
->pub
.len_information_elements
, i
, sig
;
719 memset(&iwe
, 0, sizeof(iwe
));
721 iwe
.u
.ap_addr
.sa_family
= ARPHRD_ETHER
;
722 memcpy(iwe
.u
.ap_addr
.sa_data
, bss
->pub
.bssid
, ETH_ALEN
);
723 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
726 memset(&iwe
, 0, sizeof(iwe
));
727 iwe
.cmd
= SIOCGIWFREQ
;
728 iwe
.u
.freq
.m
= ieee80211_frequency_to_channel(bss
->pub
.channel
->center_freq
);
730 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
733 memset(&iwe
, 0, sizeof(iwe
));
734 iwe
.cmd
= SIOCGIWFREQ
;
735 iwe
.u
.freq
.m
= bss
->pub
.channel
->center_freq
;
737 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
740 if (wiphy
->signal_type
!= CFG80211_SIGNAL_TYPE_NONE
) {
741 memset(&iwe
, 0, sizeof(iwe
));
743 iwe
.u
.qual
.updated
= IW_QUAL_LEVEL_UPDATED
|
744 IW_QUAL_NOISE_INVALID
|
745 IW_QUAL_QUAL_UPDATED
;
746 switch (wiphy
->signal_type
) {
747 case CFG80211_SIGNAL_TYPE_MBM
:
748 sig
= bss
->pub
.signal
/ 100;
749 iwe
.u
.qual
.level
= sig
;
750 iwe
.u
.qual
.updated
|= IW_QUAL_DBM
;
751 if (sig
< -110) /* rather bad */
753 else if (sig
> -40) /* perfect */
755 /* will give a range of 0 .. 70 */
756 iwe
.u
.qual
.qual
= sig
+ 110;
758 case CFG80211_SIGNAL_TYPE_UNSPEC
:
759 iwe
.u
.qual
.level
= bss
->pub
.signal
;
760 /* will give range 0 .. 100 */
761 iwe
.u
.qual
.qual
= bss
->pub
.signal
;
767 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
,
768 &iwe
, IW_EV_QUAL_LEN
);
771 memset(&iwe
, 0, sizeof(iwe
));
772 iwe
.cmd
= SIOCGIWENCODE
;
773 if (bss
->pub
.capability
& WLAN_CAPABILITY_PRIVACY
)
774 iwe
.u
.data
.flags
= IW_ENCODE_ENABLED
| IW_ENCODE_NOKEY
;
776 iwe
.u
.data
.flags
= IW_ENCODE_DISABLED
;
777 iwe
.u
.data
.length
= 0;
778 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
788 memset(&iwe
, 0, sizeof(iwe
));
789 iwe
.cmd
= SIOCGIWESSID
;
790 iwe
.u
.data
.length
= ie
[1];
791 iwe
.u
.data
.flags
= 1;
792 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
795 case WLAN_EID_MESH_ID
:
796 memset(&iwe
, 0, sizeof(iwe
));
797 iwe
.cmd
= SIOCGIWESSID
;
798 iwe
.u
.data
.length
= ie
[1];
799 iwe
.u
.data
.flags
= 1;
800 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
803 case WLAN_EID_MESH_CONFIG
:
805 if (ie
[1] != IEEE80211_MESH_CONFIG_LEN
)
807 buf
= kmalloc(50, GFP_ATOMIC
);
811 memset(&iwe
, 0, sizeof(iwe
));
812 iwe
.cmd
= IWEVCUSTOM
;
813 sprintf(buf
, "Mesh network (version %d)", cfg
[0]);
814 iwe
.u
.data
.length
= strlen(buf
);
815 current_ev
= iwe_stream_add_point(info
, current_ev
,
818 sprintf(buf
, "Path Selection Protocol ID: "
819 "0x%02X%02X%02X%02X", cfg
[1], cfg
[2], cfg
[3],
821 iwe
.u
.data
.length
= strlen(buf
);
822 current_ev
= iwe_stream_add_point(info
, current_ev
,
825 sprintf(buf
, "Path Selection Metric ID: "
826 "0x%02X%02X%02X%02X", cfg
[5], cfg
[6], cfg
[7],
828 iwe
.u
.data
.length
= strlen(buf
);
829 current_ev
= iwe_stream_add_point(info
, current_ev
,
832 sprintf(buf
, "Congestion Control Mode ID: "
833 "0x%02X%02X%02X%02X", cfg
[9], cfg
[10],
835 iwe
.u
.data
.length
= strlen(buf
);
836 current_ev
= iwe_stream_add_point(info
, current_ev
,
839 sprintf(buf
, "Channel Precedence: "
840 "0x%02X%02X%02X%02X", cfg
[13], cfg
[14],
842 iwe
.u
.data
.length
= strlen(buf
);
843 current_ev
= iwe_stream_add_point(info
, current_ev
,
848 case WLAN_EID_SUPP_RATES
:
849 case WLAN_EID_EXT_SUPP_RATES
:
850 /* display all supported rates in readable format */
851 p
= current_ev
+ iwe_stream_lcp_len(info
);
853 memset(&iwe
, 0, sizeof(iwe
));
854 iwe
.cmd
= SIOCGIWRATE
;
855 /* Those two flags are ignored... */
856 iwe
.u
.bitrate
.fixed
= iwe
.u
.bitrate
.disabled
= 0;
858 for (i
= 0; i
< ie
[1]; i
++) {
859 iwe
.u
.bitrate
.value
=
860 ((ie
[i
+ 2] & 0x7f) * 500000);
861 p
= iwe_stream_add_value(info
, current_ev
, p
,
862 end_buf
, &iwe
, IW_EV_PARAM_LEN
);
871 if (bss
->pub
.capability
& (WLAN_CAPABILITY_ESS
| WLAN_CAPABILITY_IBSS
)
873 memset(&iwe
, 0, sizeof(iwe
));
874 iwe
.cmd
= SIOCGIWMODE
;
876 iwe
.u
.mode
= IW_MODE_MESH
;
877 else if (bss
->pub
.capability
& WLAN_CAPABILITY_ESS
)
878 iwe
.u
.mode
= IW_MODE_MASTER
;
880 iwe
.u
.mode
= IW_MODE_ADHOC
;
881 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
,
882 &iwe
, IW_EV_UINT_LEN
);
885 buf
= kmalloc(30, GFP_ATOMIC
);
887 memset(&iwe
, 0, sizeof(iwe
));
888 iwe
.cmd
= IWEVCUSTOM
;
889 sprintf(buf
, "tsf=%016llx", (unsigned long long)(bss
->pub
.tsf
));
890 iwe
.u
.data
.length
= strlen(buf
);
891 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
893 memset(&iwe
, 0, sizeof(iwe
));
894 iwe
.cmd
= IWEVCUSTOM
;
895 sprintf(buf
, " Last beacon: %ums ago",
896 elapsed_jiffies_msecs(bss
->ts
));
897 iwe
.u
.data
.length
= strlen(buf
);
898 current_ev
= iwe_stream_add_point(info
, current_ev
,
903 ieee80211_scan_add_ies(info
, &bss
->pub
, ¤t_ev
, end_buf
);
909 static int ieee80211_scan_results(struct cfg80211_registered_device
*dev
,
910 struct iw_request_info
*info
,
911 char *buf
, size_t len
)
913 char *current_ev
= buf
;
914 char *end_buf
= buf
+ len
;
915 struct cfg80211_internal_bss
*bss
;
917 spin_lock_bh(&dev
->bss_lock
);
918 cfg80211_bss_expire(dev
);
920 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
921 if (buf
+ len
- current_ev
<= IW_EV_ADDR_LEN
) {
922 spin_unlock_bh(&dev
->bss_lock
);
925 current_ev
= ieee80211_bss(&dev
->wiphy
, info
, bss
,
926 current_ev
, end_buf
);
928 spin_unlock_bh(&dev
->bss_lock
);
929 return current_ev
- buf
;
933 int cfg80211_wext_giwscan(struct net_device
*dev
,
934 struct iw_request_info
*info
,
935 struct iw_point
*data
, char *extra
)
937 struct cfg80211_registered_device
*rdev
;
940 if (!netif_running(dev
))
943 rdev
= cfg80211_get_dev_from_ifindex(dev_net(dev
), dev
->ifindex
);
946 return PTR_ERR(rdev
);
948 if (rdev
->scan_req
) {
953 res
= ieee80211_scan_results(rdev
, info
, extra
, data
->length
);
961 cfg80211_unlock_rdev(rdev
);
964 EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan
);