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 (10 * HZ)
20 void cfg80211_scan_done(struct cfg80211_scan_request
*request
, bool aborted
)
22 struct net_device
*dev
;
23 #ifdef CONFIG_WIRELESS_EXT
24 union iwreq_data wrqu
;
27 dev
= dev_get_by_index(&init_net
, request
->ifidx
);
31 WARN_ON(request
!= wiphy_to_dev(request
->wiphy
)->scan_req
);
34 nl80211_send_scan_aborted(wiphy_to_dev(request
->wiphy
), dev
);
36 nl80211_send_scan_done(wiphy_to_dev(request
->wiphy
), dev
);
38 #ifdef CONFIG_WIRELESS_EXT
40 memset(&wrqu
, 0, sizeof(wrqu
));
42 wireless_send_event(dev
, SIOCGIWSCAN
, &wrqu
, NULL
);
49 wiphy_to_dev(request
->wiphy
)->scan_req
= NULL
;
52 EXPORT_SYMBOL(cfg80211_scan_done
);
54 static void bss_release(struct kref
*ref
)
56 struct cfg80211_internal_bss
*bss
;
58 bss
= container_of(ref
, struct cfg80211_internal_bss
, ref
);
59 if (bss
->pub
.free_priv
)
60 bss
->pub
.free_priv(&bss
->pub
);
62 if (bss
->ies_allocated
)
63 kfree(bss
->pub
.information_elements
);
68 /* must hold dev->bss_lock! */
69 void cfg80211_bss_age(struct cfg80211_registered_device
*dev
,
70 unsigned long age_secs
)
72 struct cfg80211_internal_bss
*bss
;
73 unsigned long age_jiffies
= msecs_to_jiffies(age_secs
* MSEC_PER_SEC
);
75 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
76 bss
->ts
-= age_jiffies
;
80 /* must hold dev->bss_lock! */
81 void cfg80211_bss_expire(struct cfg80211_registered_device
*dev
)
83 struct cfg80211_internal_bss
*bss
, *tmp
;
86 list_for_each_entry_safe(bss
, tmp
, &dev
->bss_list
, list
) {
88 !time_after(jiffies
, bss
->ts
+ IEEE80211_SCAN_RESULT_EXPIRE
))
91 rb_erase(&bss
->rbn
, &dev
->bss_tree
);
92 kref_put(&bss
->ref
, bss_release
);
97 dev
->bss_generation
++;
100 static u8
*find_ie(u8 num
, u8
*ies
, size_t len
)
102 while (len
> 2 && ies
[0] != num
) {
108 if (len
< 2 + ies
[1])
113 static int cmp_ies(u8 num
, u8
*ies1
, size_t len1
, u8
*ies2
, size_t len2
)
115 const u8
*ie1
= find_ie(num
, ies1
, len1
);
116 const u8
*ie2
= find_ie(num
, ies2
, len2
);
124 r
= memcmp(ie1
+ 2, ie2
+ 2, min(ie1
[1], ie2
[1]));
125 if (r
== 0 && ie1
[1] != ie2
[1])
126 return ie2
[1] - ie1
[1];
130 static bool is_bss(struct cfg80211_bss
*a
,
132 const u8
*ssid
, size_t ssid_len
)
136 if (bssid
&& compare_ether_addr(a
->bssid
, bssid
))
142 ssidie
= find_ie(WLAN_EID_SSID
,
143 a
->information_elements
,
144 a
->len_information_elements
);
147 if (ssidie
[1] != ssid_len
)
149 return memcmp(ssidie
+ 2, ssid
, ssid_len
) == 0;
152 static bool is_mesh(struct cfg80211_bss
*a
,
153 const u8
*meshid
, size_t meshidlen
,
158 if (!is_zero_ether_addr(a
->bssid
))
161 ie
= find_ie(WLAN_EID_MESH_ID
,
162 a
->information_elements
,
163 a
->len_information_elements
);
166 if (ie
[1] != meshidlen
)
168 if (memcmp(ie
+ 2, meshid
, meshidlen
))
171 ie
= find_ie(WLAN_EID_MESH_CONFIG
,
172 a
->information_elements
,
173 a
->len_information_elements
);
176 if (ie
[1] != IEEE80211_MESH_CONFIG_LEN
)
180 * Ignore mesh capability (last two bytes of the IE) when
181 * comparing since that may differ between stations taking
182 * part in the same mesh.
184 return memcmp(ie
+ 2, meshcfg
, IEEE80211_MESH_CONFIG_LEN
- 2) == 0;
187 static int cmp_bss(struct cfg80211_bss
*a
,
188 struct cfg80211_bss
*b
)
192 if (a
->channel
!= b
->channel
)
193 return b
->channel
->center_freq
- a
->channel
->center_freq
;
195 r
= memcmp(a
->bssid
, b
->bssid
, ETH_ALEN
);
199 if (is_zero_ether_addr(a
->bssid
)) {
200 r
= cmp_ies(WLAN_EID_MESH_ID
,
201 a
->information_elements
,
202 a
->len_information_elements
,
203 b
->information_elements
,
204 b
->len_information_elements
);
207 return cmp_ies(WLAN_EID_MESH_CONFIG
,
208 a
->information_elements
,
209 a
->len_information_elements
,
210 b
->information_elements
,
211 b
->len_information_elements
);
214 return cmp_ies(WLAN_EID_SSID
,
215 a
->information_elements
,
216 a
->len_information_elements
,
217 b
->information_elements
,
218 b
->len_information_elements
);
221 struct cfg80211_bss
*cfg80211_get_bss(struct wiphy
*wiphy
,
222 struct ieee80211_channel
*channel
,
224 const u8
*ssid
, size_t ssid_len
,
225 u16 capa_mask
, u16 capa_val
)
227 struct cfg80211_registered_device
*dev
= wiphy_to_dev(wiphy
);
228 struct cfg80211_internal_bss
*bss
, *res
= NULL
;
230 spin_lock_bh(&dev
->bss_lock
);
232 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
233 if ((bss
->pub
.capability
& capa_mask
) != capa_val
)
235 if (channel
&& bss
->pub
.channel
!= channel
)
237 if (is_bss(&bss
->pub
, bssid
, ssid
, ssid_len
)) {
244 spin_unlock_bh(&dev
->bss_lock
);
249 EXPORT_SYMBOL(cfg80211_get_bss
);
251 struct cfg80211_bss
*cfg80211_get_mesh(struct wiphy
*wiphy
,
252 struct ieee80211_channel
*channel
,
253 const u8
*meshid
, size_t meshidlen
,
256 struct cfg80211_registered_device
*dev
= wiphy_to_dev(wiphy
);
257 struct cfg80211_internal_bss
*bss
, *res
= NULL
;
259 spin_lock_bh(&dev
->bss_lock
);
261 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
262 if (channel
&& bss
->pub
.channel
!= channel
)
264 if (is_mesh(&bss
->pub
, meshid
, meshidlen
, meshcfg
)) {
271 spin_unlock_bh(&dev
->bss_lock
);
276 EXPORT_SYMBOL(cfg80211_get_mesh
);
279 static void rb_insert_bss(struct cfg80211_registered_device
*dev
,
280 struct cfg80211_internal_bss
*bss
)
282 struct rb_node
**p
= &dev
->bss_tree
.rb_node
;
283 struct rb_node
*parent
= NULL
;
284 struct cfg80211_internal_bss
*tbss
;
289 tbss
= rb_entry(parent
, struct cfg80211_internal_bss
, rbn
);
291 cmp
= cmp_bss(&bss
->pub
, &tbss
->pub
);
294 /* will sort of leak this BSS */
304 rb_link_node(&bss
->rbn
, parent
, p
);
305 rb_insert_color(&bss
->rbn
, &dev
->bss_tree
);
308 static struct cfg80211_internal_bss
*
309 rb_find_bss(struct cfg80211_registered_device
*dev
,
310 struct cfg80211_internal_bss
*res
)
312 struct rb_node
*n
= dev
->bss_tree
.rb_node
;
313 struct cfg80211_internal_bss
*bss
;
317 bss
= rb_entry(n
, struct cfg80211_internal_bss
, rbn
);
318 r
= cmp_bss(&res
->pub
, &bss
->pub
);
331 static struct cfg80211_internal_bss
*
332 cfg80211_bss_update(struct cfg80211_registered_device
*dev
,
333 struct cfg80211_internal_bss
*res
,
336 struct cfg80211_internal_bss
*found
= NULL
;
337 const u8
*meshid
, *meshcfg
;
340 * The reference to "res" is donated to this function.
343 if (WARN_ON(!res
->pub
.channel
)) {
344 kref_put(&res
->ref
, bss_release
);
350 if (is_zero_ether_addr(res
->pub
.bssid
)) {
351 /* must be mesh, verify */
352 meshid
= find_ie(WLAN_EID_MESH_ID
, res
->pub
.information_elements
,
353 res
->pub
.len_information_elements
);
354 meshcfg
= find_ie(WLAN_EID_MESH_CONFIG
,
355 res
->pub
.information_elements
,
356 res
->pub
.len_information_elements
);
357 if (!meshid
|| !meshcfg
||
358 meshcfg
[1] != IEEE80211_MESH_CONFIG_LEN
) {
360 kref_put(&res
->ref
, bss_release
);
365 spin_lock_bh(&dev
->bss_lock
);
367 found
= rb_find_bss(dev
, res
);
370 found
->pub
.beacon_interval
= res
->pub
.beacon_interval
;
371 found
->pub
.tsf
= res
->pub
.tsf
;
372 found
->pub
.signal
= res
->pub
.signal
;
373 found
->pub
.capability
= res
->pub
.capability
;
378 size_t used
= dev
->wiphy
.bss_priv_size
+ sizeof(*res
);
379 size_t ielen
= res
->pub
.len_information_elements
;
381 if (!found
->ies_allocated
&& ksize(found
) >= used
+ ielen
) {
382 memcpy(found
->pub
.information_elements
,
383 res
->pub
.information_elements
, ielen
);
384 found
->pub
.len_information_elements
= ielen
;
386 u8
*ies
= found
->pub
.information_elements
;
388 if (found
->ies_allocated
)
389 ies
= krealloc(ies
, ielen
, GFP_ATOMIC
);
391 ies
= kmalloc(ielen
, GFP_ATOMIC
);
394 memcpy(ies
, res
->pub
.information_elements
, ielen
);
395 found
->ies_allocated
= true;
396 found
->pub
.information_elements
= ies
;
397 found
->pub
.len_information_elements
= ielen
;
402 kref_put(&res
->ref
, bss_release
);
404 /* this "consumes" the reference */
405 list_add_tail(&res
->list
, &dev
->bss_list
);
406 rb_insert_bss(dev
, res
);
410 dev
->bss_generation
++;
411 spin_unlock_bh(&dev
->bss_lock
);
413 kref_get(&found
->ref
);
418 cfg80211_inform_bss(struct wiphy
*wiphy
,
419 struct ieee80211_channel
*channel
,
421 u64 timestamp
, u16 capability
, u16 beacon_interval
,
422 const u8
*ie
, size_t ielen
,
423 s32 signal
, gfp_t gfp
)
425 struct cfg80211_internal_bss
*res
;
431 privsz
= wiphy
->bss_priv_size
;
433 if (WARN_ON(wiphy
->signal_type
== NL80211_BSS_SIGNAL_UNSPEC
&&
434 (signal
< 0 || signal
> 100)))
437 res
= kzalloc(sizeof(*res
) + privsz
+ ielen
, gfp
);
441 memcpy(res
->pub
.bssid
, bssid
, ETH_ALEN
);
442 res
->pub
.channel
= channel
;
443 res
->pub
.signal
= signal
;
444 res
->pub
.tsf
= timestamp
;
445 res
->pub
.beacon_interval
= beacon_interval
;
446 res
->pub
.capability
= capability
;
447 /* point to after the private area */
448 res
->pub
.information_elements
= (u8
*)res
+ sizeof(*res
) + privsz
;
449 memcpy(res
->pub
.information_elements
, ie
, ielen
);
450 res
->pub
.len_information_elements
= ielen
;
452 kref_init(&res
->ref
);
454 res
= cfg80211_bss_update(wiphy_to_dev(wiphy
), res
, 0);
458 if (res
->pub
.capability
& WLAN_CAPABILITY_ESS
)
459 regulatory_hint_found_beacon(wiphy
, channel
, gfp
);
461 /* cfg80211_bss_update gives us a referenced result */
464 EXPORT_SYMBOL(cfg80211_inform_bss
);
466 struct cfg80211_bss
*
467 cfg80211_inform_bss_frame(struct wiphy
*wiphy
,
468 struct ieee80211_channel
*channel
,
469 struct ieee80211_mgmt
*mgmt
, size_t len
,
470 s32 signal
, gfp_t gfp
)
472 struct cfg80211_internal_bss
*res
;
473 size_t ielen
= len
- offsetof(struct ieee80211_mgmt
,
474 u
.probe_resp
.variable
);
476 size_t privsz
= wiphy
->bss_priv_size
;
478 if (WARN_ON(wiphy
->signal_type
== NL80211_BSS_SIGNAL_UNSPEC
&&
479 (signal
< 0 || signal
> 100)))
482 if (WARN_ON(!mgmt
|| !wiphy
||
483 len
< offsetof(struct ieee80211_mgmt
, u
.probe_resp
.variable
)))
486 res
= kzalloc(sizeof(*res
) + privsz
+ ielen
, gfp
);
490 memcpy(res
->pub
.bssid
, mgmt
->bssid
, ETH_ALEN
);
491 res
->pub
.channel
= channel
;
492 res
->pub
.signal
= signal
;
493 res
->pub
.tsf
= le64_to_cpu(mgmt
->u
.probe_resp
.timestamp
);
494 res
->pub
.beacon_interval
= le16_to_cpu(mgmt
->u
.probe_resp
.beacon_int
);
495 res
->pub
.capability
= le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
);
496 /* point to after the private area */
497 res
->pub
.information_elements
= (u8
*)res
+ sizeof(*res
) + privsz
;
498 memcpy(res
->pub
.information_elements
, mgmt
->u
.probe_resp
.variable
, ielen
);
499 res
->pub
.len_information_elements
= ielen
;
501 kref_init(&res
->ref
);
503 overwrite
= ieee80211_is_probe_resp(mgmt
->frame_control
);
505 res
= cfg80211_bss_update(wiphy_to_dev(wiphy
), res
, overwrite
);
509 if (res
->pub
.capability
& WLAN_CAPABILITY_ESS
)
510 regulatory_hint_found_beacon(wiphy
, channel
, gfp
);
512 /* cfg80211_bss_update gives us a referenced result */
515 EXPORT_SYMBOL(cfg80211_inform_bss_frame
);
517 void cfg80211_put_bss(struct cfg80211_bss
*pub
)
519 struct cfg80211_internal_bss
*bss
;
524 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
525 kref_put(&bss
->ref
, bss_release
);
527 EXPORT_SYMBOL(cfg80211_put_bss
);
529 void cfg80211_unlink_bss(struct wiphy
*wiphy
, struct cfg80211_bss
*pub
)
531 struct cfg80211_registered_device
*dev
= wiphy_to_dev(wiphy
);
532 struct cfg80211_internal_bss
*bss
;
537 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
539 spin_lock_bh(&dev
->bss_lock
);
541 list_del(&bss
->list
);
542 rb_erase(&bss
->rbn
, &dev
->bss_tree
);
544 spin_unlock_bh(&dev
->bss_lock
);
546 kref_put(&bss
->ref
, bss_release
);
548 EXPORT_SYMBOL(cfg80211_unlink_bss
);
550 void cfg80211_hold_bss(struct cfg80211_bss
*pub
)
552 struct cfg80211_internal_bss
*bss
;
557 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
560 EXPORT_SYMBOL(cfg80211_hold_bss
);
562 void cfg80211_unhold_bss(struct cfg80211_bss
*pub
)
564 struct cfg80211_internal_bss
*bss
;
569 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
572 EXPORT_SYMBOL(cfg80211_unhold_bss
);
574 #ifdef CONFIG_WIRELESS_EXT
575 int cfg80211_wext_siwscan(struct net_device
*dev
,
576 struct iw_request_info
*info
,
577 union iwreq_data
*wrqu
, char *extra
)
579 struct cfg80211_registered_device
*rdev
;
581 struct iw_scan_req
*wreq
= NULL
;
582 struct cfg80211_scan_request
*creq
;
583 int i
, err
, n_channels
= 0;
584 enum ieee80211_band band
;
586 if (!netif_running(dev
))
589 rdev
= cfg80211_get_dev_from_ifindex(dev
->ifindex
);
592 return PTR_ERR(rdev
);
594 if (rdev
->scan_req
) {
599 wiphy
= &rdev
->wiphy
;
601 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
602 if (wiphy
->bands
[band
])
603 n_channels
+= wiphy
->bands
[band
]->n_channels
;
605 creq
= kzalloc(sizeof(*creq
) + sizeof(struct cfg80211_ssid
) +
606 n_channels
* sizeof(void *),
614 creq
->ifidx
= dev
->ifindex
;
615 creq
->ssids
= (void *)(creq
+ 1);
616 creq
->channels
= (void *)(creq
->ssids
+ 1);
617 creq
->n_channels
= n_channels
;
622 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
624 if (!wiphy
->bands
[band
])
626 for (j
= 0; j
< wiphy
->bands
[band
]->n_channels
; j
++) {
627 creq
->channels
[i
] = &wiphy
->bands
[band
]->channels
[j
];
632 /* translate scan request */
633 if (wrqu
->data
.length
== sizeof(struct iw_scan_req
)) {
634 wreq
= (struct iw_scan_req
*)extra
;
636 if (wrqu
->data
.flags
& IW_SCAN_THIS_ESSID
) {
637 if (wreq
->essid_len
> IEEE80211_MAX_SSID_LEN
)
639 memcpy(creq
->ssids
[0].ssid
, wreq
->essid
, wreq
->essid_len
);
640 creq
->ssids
[0].ssid_len
= wreq
->essid_len
;
642 if (wreq
->scan_type
== IW_SCAN_TYPE_PASSIVE
)
646 rdev
->scan_req
= creq
;
647 err
= rdev
->ops
->scan(wiphy
, dev
, creq
);
649 rdev
->scan_req
= NULL
;
653 cfg80211_put_dev(rdev
);
656 EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan
);
658 static void ieee80211_scan_add_ies(struct iw_request_info
*info
,
659 struct cfg80211_bss
*bss
,
660 char **current_ev
, char *end_buf
)
662 u8
*pos
, *end
, *next
;
665 if (!bss
->information_elements
||
666 !bss
->len_information_elements
)
670 * If needed, fragment the IEs buffer (at IE boundaries) into short
671 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
673 pos
= bss
->information_elements
;
674 end
= pos
+ bss
->len_information_elements
;
676 while (end
- pos
> IW_GENERIC_IE_MAX
) {
677 next
= pos
+ 2 + pos
[1];
678 while (next
+ 2 + next
[1] - pos
< IW_GENERIC_IE_MAX
)
679 next
= next
+ 2 + next
[1];
681 memset(&iwe
, 0, sizeof(iwe
));
683 iwe
.u
.data
.length
= next
- pos
;
684 *current_ev
= iwe_stream_add_point(info
, *current_ev
,
691 memset(&iwe
, 0, sizeof(iwe
));
693 iwe
.u
.data
.length
= end
- pos
;
694 *current_ev
= iwe_stream_add_point(info
, *current_ev
,
699 static inline unsigned int elapsed_jiffies_msecs(unsigned long start
)
701 unsigned long end
= jiffies
;
704 return jiffies_to_msecs(end
- start
);
706 return jiffies_to_msecs(end
+ (MAX_JIFFY_OFFSET
- start
) + 1);
710 ieee80211_bss(struct wiphy
*wiphy
, struct iw_request_info
*info
,
711 struct cfg80211_internal_bss
*bss
, char *current_ev
,
716 u8
*ie
= bss
->pub
.information_elements
;
717 int rem
= bss
->pub
.len_information_elements
, i
, sig
;
720 memset(&iwe
, 0, sizeof(iwe
));
722 iwe
.u
.ap_addr
.sa_family
= ARPHRD_ETHER
;
723 memcpy(iwe
.u
.ap_addr
.sa_data
, bss
->pub
.bssid
, ETH_ALEN
);
724 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
727 memset(&iwe
, 0, sizeof(iwe
));
728 iwe
.cmd
= SIOCGIWFREQ
;
729 iwe
.u
.freq
.m
= ieee80211_frequency_to_channel(bss
->pub
.channel
->center_freq
);
731 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
734 memset(&iwe
, 0, sizeof(iwe
));
735 iwe
.cmd
= SIOCGIWFREQ
;
736 iwe
.u
.freq
.m
= bss
->pub
.channel
->center_freq
;
738 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
741 if (wiphy
->signal_type
!= CFG80211_SIGNAL_TYPE_NONE
) {
742 memset(&iwe
, 0, sizeof(iwe
));
744 iwe
.u
.qual
.updated
= IW_QUAL_LEVEL_UPDATED
|
745 IW_QUAL_NOISE_INVALID
|
746 IW_QUAL_QUAL_UPDATED
;
747 switch (wiphy
->signal_type
) {
748 case CFG80211_SIGNAL_TYPE_MBM
:
749 sig
= bss
->pub
.signal
/ 100;
750 iwe
.u
.qual
.level
= sig
;
751 iwe
.u
.qual
.updated
|= IW_QUAL_DBM
;
752 if (sig
< -110) /* rather bad */
754 else if (sig
> -40) /* perfect */
756 /* will give a range of 0 .. 70 */
757 iwe
.u
.qual
.qual
= sig
+ 110;
759 case CFG80211_SIGNAL_TYPE_UNSPEC
:
760 iwe
.u
.qual
.level
= bss
->pub
.signal
;
761 /* will give range 0 .. 100 */
762 iwe
.u
.qual
.qual
= bss
->pub
.signal
;
768 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
,
769 &iwe
, IW_EV_QUAL_LEN
);
772 memset(&iwe
, 0, sizeof(iwe
));
773 iwe
.cmd
= SIOCGIWENCODE
;
774 if (bss
->pub
.capability
& WLAN_CAPABILITY_PRIVACY
)
775 iwe
.u
.data
.flags
= IW_ENCODE_ENABLED
| IW_ENCODE_NOKEY
;
777 iwe
.u
.data
.flags
= IW_ENCODE_DISABLED
;
778 iwe
.u
.data
.length
= 0;
779 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
789 memset(&iwe
, 0, sizeof(iwe
));
790 iwe
.cmd
= SIOCGIWESSID
;
791 iwe
.u
.data
.length
= ie
[1];
792 iwe
.u
.data
.flags
= 1;
793 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
796 case WLAN_EID_MESH_ID
:
797 memset(&iwe
, 0, sizeof(iwe
));
798 iwe
.cmd
= SIOCGIWESSID
;
799 iwe
.u
.data
.length
= ie
[1];
800 iwe
.u
.data
.flags
= 1;
801 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
804 case WLAN_EID_MESH_CONFIG
:
806 if (ie
[1] != IEEE80211_MESH_CONFIG_LEN
)
808 buf
= kmalloc(50, GFP_ATOMIC
);
812 memset(&iwe
, 0, sizeof(iwe
));
813 iwe
.cmd
= IWEVCUSTOM
;
814 sprintf(buf
, "Mesh network (version %d)", cfg
[0]);
815 iwe
.u
.data
.length
= strlen(buf
);
816 current_ev
= iwe_stream_add_point(info
, current_ev
,
819 sprintf(buf
, "Path Selection Protocol ID: "
820 "0x%02X%02X%02X%02X", cfg
[1], cfg
[2], cfg
[3],
822 iwe
.u
.data
.length
= strlen(buf
);
823 current_ev
= iwe_stream_add_point(info
, current_ev
,
826 sprintf(buf
, "Path Selection Metric ID: "
827 "0x%02X%02X%02X%02X", cfg
[5], cfg
[6], cfg
[7],
829 iwe
.u
.data
.length
= strlen(buf
);
830 current_ev
= iwe_stream_add_point(info
, current_ev
,
833 sprintf(buf
, "Congestion Control Mode ID: "
834 "0x%02X%02X%02X%02X", cfg
[9], cfg
[10],
836 iwe
.u
.data
.length
= strlen(buf
);
837 current_ev
= iwe_stream_add_point(info
, current_ev
,
840 sprintf(buf
, "Channel Precedence: "
841 "0x%02X%02X%02X%02X", cfg
[13], cfg
[14],
843 iwe
.u
.data
.length
= strlen(buf
);
844 current_ev
= iwe_stream_add_point(info
, current_ev
,
849 case WLAN_EID_SUPP_RATES
:
850 case WLAN_EID_EXT_SUPP_RATES
:
851 /* display all supported rates in readable format */
852 p
= current_ev
+ iwe_stream_lcp_len(info
);
854 memset(&iwe
, 0, sizeof(iwe
));
855 iwe
.cmd
= SIOCGIWRATE
;
856 /* Those two flags are ignored... */
857 iwe
.u
.bitrate
.fixed
= iwe
.u
.bitrate
.disabled
= 0;
859 for (i
= 0; i
< ie
[1]; i
++) {
860 iwe
.u
.bitrate
.value
=
861 ((ie
[i
+ 2] & 0x7f) * 500000);
862 p
= iwe_stream_add_value(info
, current_ev
, p
,
863 end_buf
, &iwe
, IW_EV_PARAM_LEN
);
872 if (bss
->pub
.capability
& (WLAN_CAPABILITY_ESS
| WLAN_CAPABILITY_IBSS
)
874 memset(&iwe
, 0, sizeof(iwe
));
875 iwe
.cmd
= SIOCGIWMODE
;
877 iwe
.u
.mode
= IW_MODE_MESH
;
878 else if (bss
->pub
.capability
& WLAN_CAPABILITY_ESS
)
879 iwe
.u
.mode
= IW_MODE_MASTER
;
881 iwe
.u
.mode
= IW_MODE_ADHOC
;
882 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
,
883 &iwe
, IW_EV_UINT_LEN
);
886 buf
= kmalloc(30, GFP_ATOMIC
);
888 memset(&iwe
, 0, sizeof(iwe
));
889 iwe
.cmd
= IWEVCUSTOM
;
890 sprintf(buf
, "tsf=%016llx", (unsigned long long)(bss
->pub
.tsf
));
891 iwe
.u
.data
.length
= strlen(buf
);
892 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
894 memset(&iwe
, 0, sizeof(iwe
));
895 iwe
.cmd
= IWEVCUSTOM
;
896 sprintf(buf
, " Last beacon: %ums ago",
897 elapsed_jiffies_msecs(bss
->ts
));
898 iwe
.u
.data
.length
= strlen(buf
);
899 current_ev
= iwe_stream_add_point(info
, current_ev
,
904 ieee80211_scan_add_ies(info
, &bss
->pub
, ¤t_ev
, end_buf
);
910 static int ieee80211_scan_results(struct cfg80211_registered_device
*dev
,
911 struct iw_request_info
*info
,
912 char *buf
, size_t len
)
914 char *current_ev
= buf
;
915 char *end_buf
= buf
+ len
;
916 struct cfg80211_internal_bss
*bss
;
918 spin_lock_bh(&dev
->bss_lock
);
919 cfg80211_bss_expire(dev
);
921 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
922 if (buf
+ len
- current_ev
<= IW_EV_ADDR_LEN
) {
923 spin_unlock_bh(&dev
->bss_lock
);
926 current_ev
= ieee80211_bss(&dev
->wiphy
, info
, bss
,
927 current_ev
, end_buf
);
929 spin_unlock_bh(&dev
->bss_lock
);
930 return current_ev
- buf
;
934 int cfg80211_wext_giwscan(struct net_device
*dev
,
935 struct iw_request_info
*info
,
936 struct iw_point
*data
, char *extra
)
938 struct cfg80211_registered_device
*rdev
;
941 if (!netif_running(dev
))
944 rdev
= cfg80211_get_dev_from_ifindex(dev
->ifindex
);
947 return PTR_ERR(rdev
);
949 if (rdev
->scan_req
) {
954 res
= ieee80211_scan_results(rdev
, info
, extra
, data
->length
);
962 cfg80211_put_dev(rdev
);
965 EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan
);