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
);
32 wiphy_to_dev(request
->wiphy
)->scan_req
= NULL
;
35 nl80211_send_scan_aborted(wiphy_to_dev(request
->wiphy
), dev
);
37 nl80211_send_scan_done(wiphy_to_dev(request
->wiphy
), dev
);
39 #ifdef CONFIG_WIRELESS_EXT
41 memset(&wrqu
, 0, sizeof(wrqu
));
43 wireless_send_event(dev
, SIOCGIWSCAN
, &wrqu
, 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
);
174 if (ie
[1] != IEEE80211_MESH_CONFIG_LEN
)
178 * Ignore mesh capability (last two bytes of the IE) when
179 * comparing since that may differ between stations taking
180 * part in the same mesh.
182 return memcmp(ie
+ 2, meshcfg
, IEEE80211_MESH_CONFIG_LEN
- 2) == 0;
185 static int cmp_bss(struct cfg80211_bss
*a
,
186 struct cfg80211_bss
*b
)
190 if (a
->channel
!= b
->channel
)
191 return b
->channel
->center_freq
- a
->channel
->center_freq
;
193 r
= memcmp(a
->bssid
, b
->bssid
, ETH_ALEN
);
197 if (is_zero_ether_addr(a
->bssid
)) {
198 r
= cmp_ies(WLAN_EID_MESH_ID
,
199 a
->information_elements
,
200 a
->len_information_elements
,
201 b
->information_elements
,
202 b
->len_information_elements
);
205 return cmp_ies(WLAN_EID_MESH_CONFIG
,
206 a
->information_elements
,
207 a
->len_information_elements
,
208 b
->information_elements
,
209 b
->len_information_elements
);
212 return cmp_ies(WLAN_EID_SSID
,
213 a
->information_elements
,
214 a
->len_information_elements
,
215 b
->information_elements
,
216 b
->len_information_elements
);
219 struct cfg80211_bss
*cfg80211_get_bss(struct wiphy
*wiphy
,
220 struct ieee80211_channel
*channel
,
222 const u8
*ssid
, size_t ssid_len
,
223 u16 capa_mask
, u16 capa_val
)
225 struct cfg80211_registered_device
*dev
= wiphy_to_dev(wiphy
);
226 struct cfg80211_internal_bss
*bss
, *res
= NULL
;
228 spin_lock_bh(&dev
->bss_lock
);
230 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
231 if ((bss
->pub
.capability
& capa_mask
) != capa_val
)
233 if (channel
&& bss
->pub
.channel
!= channel
)
235 if (is_bss(&bss
->pub
, bssid
, ssid
, ssid_len
)) {
242 spin_unlock_bh(&dev
->bss_lock
);
247 EXPORT_SYMBOL(cfg80211_get_bss
);
249 struct cfg80211_bss
*cfg80211_get_mesh(struct wiphy
*wiphy
,
250 struct ieee80211_channel
*channel
,
251 const u8
*meshid
, size_t meshidlen
,
254 struct cfg80211_registered_device
*dev
= wiphy_to_dev(wiphy
);
255 struct cfg80211_internal_bss
*bss
, *res
= NULL
;
257 spin_lock_bh(&dev
->bss_lock
);
259 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
260 if (channel
&& bss
->pub
.channel
!= channel
)
262 if (is_mesh(&bss
->pub
, meshid
, meshidlen
, meshcfg
)) {
269 spin_unlock_bh(&dev
->bss_lock
);
274 EXPORT_SYMBOL(cfg80211_get_mesh
);
277 static void rb_insert_bss(struct cfg80211_registered_device
*dev
,
278 struct cfg80211_internal_bss
*bss
)
280 struct rb_node
**p
= &dev
->bss_tree
.rb_node
;
281 struct rb_node
*parent
= NULL
;
282 struct cfg80211_internal_bss
*tbss
;
287 tbss
= rb_entry(parent
, struct cfg80211_internal_bss
, rbn
);
289 cmp
= cmp_bss(&bss
->pub
, &tbss
->pub
);
292 /* will sort of leak this BSS */
302 rb_link_node(&bss
->rbn
, parent
, p
);
303 rb_insert_color(&bss
->rbn
, &dev
->bss_tree
);
306 static struct cfg80211_internal_bss
*
307 rb_find_bss(struct cfg80211_registered_device
*dev
,
308 struct cfg80211_internal_bss
*res
)
310 struct rb_node
*n
= dev
->bss_tree
.rb_node
;
311 struct cfg80211_internal_bss
*bss
;
315 bss
= rb_entry(n
, struct cfg80211_internal_bss
, rbn
);
316 r
= cmp_bss(&res
->pub
, &bss
->pub
);
329 static struct cfg80211_internal_bss
*
330 cfg80211_bss_update(struct cfg80211_registered_device
*dev
,
331 struct cfg80211_internal_bss
*res
,
334 struct cfg80211_internal_bss
*found
= NULL
;
335 const u8
*meshid
, *meshcfg
;
338 * The reference to "res" is donated to this function.
341 if (WARN_ON(!res
->pub
.channel
)) {
342 kref_put(&res
->ref
, bss_release
);
348 if (is_zero_ether_addr(res
->pub
.bssid
)) {
349 /* must be mesh, verify */
350 meshid
= find_ie(WLAN_EID_MESH_ID
, res
->pub
.information_elements
,
351 res
->pub
.len_information_elements
);
352 meshcfg
= find_ie(WLAN_EID_MESH_CONFIG
,
353 res
->pub
.information_elements
,
354 res
->pub
.len_information_elements
);
355 if (!meshid
|| !meshcfg
||
356 meshcfg
[1] != IEEE80211_MESH_CONFIG_LEN
) {
358 kref_put(&res
->ref
, bss_release
);
363 spin_lock_bh(&dev
->bss_lock
);
365 found
= rb_find_bss(dev
, res
);
368 kref_get(&found
->ref
);
369 found
->pub
.beacon_interval
= res
->pub
.beacon_interval
;
370 found
->pub
.tsf
= res
->pub
.tsf
;
371 found
->pub
.signal
= res
->pub
.signal
;
372 found
->pub
.capability
= res
->pub
.capability
;
377 size_t used
= dev
->wiphy
.bss_priv_size
+ sizeof(*res
);
378 size_t ielen
= res
->pub
.len_information_elements
;
380 if (ksize(found
) >= used
+ ielen
) {
381 memcpy(found
->pub
.information_elements
,
382 res
->pub
.information_elements
, ielen
);
383 found
->pub
.len_information_elements
= ielen
;
385 u8
*ies
= found
->pub
.information_elements
;
387 if (found
->ies_allocated
) {
388 if (ksize(ies
) < ielen
)
389 ies
= krealloc(ies
, ielen
,
392 ies
= kmalloc(ielen
, GFP_ATOMIC
);
395 memcpy(ies
, res
->pub
.information_elements
, ielen
);
396 found
->ies_allocated
= true;
397 found
->pub
.information_elements
= ies
;
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
);
417 struct cfg80211_bss
*
418 cfg80211_inform_bss_frame(struct wiphy
*wiphy
,
419 struct ieee80211_channel
*channel
,
420 struct ieee80211_mgmt
*mgmt
, size_t len
,
421 s32 signal
, gfp_t gfp
)
423 struct cfg80211_internal_bss
*res
;
424 size_t ielen
= len
- offsetof(struct ieee80211_mgmt
,
425 u
.probe_resp
.variable
);
427 size_t privsz
= wiphy
->bss_priv_size
;
429 if (WARN_ON(wiphy
->signal_type
== NL80211_BSS_SIGNAL_UNSPEC
&&
430 (signal
< 0 || signal
> 100)))
433 if (WARN_ON(!mgmt
|| !wiphy
||
434 len
< offsetof(struct ieee80211_mgmt
, u
.probe_resp
.variable
)))
437 res
= kzalloc(sizeof(*res
) + privsz
+ ielen
, gfp
);
441 memcpy(res
->pub
.bssid
, mgmt
->bssid
, ETH_ALEN
);
442 res
->pub
.channel
= channel
;
443 res
->pub
.signal
= signal
;
444 res
->pub
.tsf
= le64_to_cpu(mgmt
->u
.probe_resp
.timestamp
);
445 res
->pub
.beacon_interval
= le16_to_cpu(mgmt
->u
.probe_resp
.beacon_int
);
446 res
->pub
.capability
= le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
);
447 /* point to after the private area */
448 res
->pub
.information_elements
= (u8
*)res
+ sizeof(*res
) + privsz
;
449 memcpy(res
->pub
.information_elements
, mgmt
->u
.probe_resp
.variable
, ielen
);
450 res
->pub
.len_information_elements
= ielen
;
452 kref_init(&res
->ref
);
454 overwrite
= ieee80211_is_probe_resp(mgmt
->frame_control
);
456 res
= cfg80211_bss_update(wiphy_to_dev(wiphy
), res
, overwrite
);
460 if (res
->pub
.capability
& WLAN_CAPABILITY_ESS
)
461 regulatory_hint_found_beacon(wiphy
, channel
, gfp
);
463 /* cfg80211_bss_update gives us a referenced result */
466 EXPORT_SYMBOL(cfg80211_inform_bss_frame
);
468 void cfg80211_put_bss(struct cfg80211_bss
*pub
)
470 struct cfg80211_internal_bss
*bss
;
475 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
476 kref_put(&bss
->ref
, bss_release
);
478 EXPORT_SYMBOL(cfg80211_put_bss
);
480 void cfg80211_unlink_bss(struct wiphy
*wiphy
, struct cfg80211_bss
*pub
)
482 struct cfg80211_registered_device
*dev
= wiphy_to_dev(wiphy
);
483 struct cfg80211_internal_bss
*bss
;
488 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
490 spin_lock_bh(&dev
->bss_lock
);
492 list_del(&bss
->list
);
493 rb_erase(&bss
->rbn
, &dev
->bss_tree
);
495 spin_unlock_bh(&dev
->bss_lock
);
497 kref_put(&bss
->ref
, bss_release
);
499 EXPORT_SYMBOL(cfg80211_unlink_bss
);
501 void cfg80211_hold_bss(struct cfg80211_bss
*pub
)
503 struct cfg80211_internal_bss
*bss
;
508 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
511 EXPORT_SYMBOL(cfg80211_hold_bss
);
513 void cfg80211_unhold_bss(struct cfg80211_bss
*pub
)
515 struct cfg80211_internal_bss
*bss
;
520 bss
= container_of(pub
, struct cfg80211_internal_bss
, pub
);
523 EXPORT_SYMBOL(cfg80211_unhold_bss
);
525 #ifdef CONFIG_WIRELESS_EXT
526 int cfg80211_wext_siwscan(struct net_device
*dev
,
527 struct iw_request_info
*info
,
528 union iwreq_data
*wrqu
, char *extra
)
530 struct cfg80211_registered_device
*rdev
;
532 struct iw_scan_req
*wreq
= NULL
;
533 struct cfg80211_scan_request
*creq
;
534 int i
, err
, n_channels
= 0;
535 enum ieee80211_band band
;
537 if (!netif_running(dev
))
540 rdev
= cfg80211_get_dev_from_ifindex(dev
->ifindex
);
543 return PTR_ERR(rdev
);
545 if (rdev
->scan_req
) {
550 wiphy
= &rdev
->wiphy
;
552 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
553 if (wiphy
->bands
[band
])
554 n_channels
+= wiphy
->bands
[band
]->n_channels
;
556 creq
= kzalloc(sizeof(*creq
) + sizeof(struct cfg80211_ssid
) +
557 n_channels
* sizeof(void *),
565 creq
->ifidx
= dev
->ifindex
;
566 creq
->ssids
= (void *)(creq
+ 1);
567 creq
->channels
= (void *)(creq
->ssids
+ 1);
568 creq
->n_channels
= n_channels
;
573 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
575 if (!wiphy
->bands
[band
])
577 for (j
= 0; j
< wiphy
->bands
[band
]->n_channels
; j
++) {
578 creq
->channels
[i
] = &wiphy
->bands
[band
]->channels
[j
];
583 /* translate scan request */
584 if (wrqu
->data
.length
== sizeof(struct iw_scan_req
)) {
585 wreq
= (struct iw_scan_req
*)extra
;
587 if (wrqu
->data
.flags
& IW_SCAN_THIS_ESSID
) {
588 if (wreq
->essid_len
> IEEE80211_MAX_SSID_LEN
)
590 memcpy(creq
->ssids
[0].ssid
, wreq
->essid
, wreq
->essid_len
);
591 creq
->ssids
[0].ssid_len
= wreq
->essid_len
;
593 if (wreq
->scan_type
== IW_SCAN_TYPE_PASSIVE
)
597 rdev
->scan_req
= creq
;
598 err
= rdev
->ops
->scan(wiphy
, dev
, creq
);
600 rdev
->scan_req
= NULL
;
604 cfg80211_put_dev(rdev
);
607 EXPORT_SYMBOL(cfg80211_wext_siwscan
);
609 static void ieee80211_scan_add_ies(struct iw_request_info
*info
,
610 struct cfg80211_bss
*bss
,
611 char **current_ev
, char *end_buf
)
613 u8
*pos
, *end
, *next
;
616 if (!bss
->information_elements
||
617 !bss
->len_information_elements
)
621 * If needed, fragment the IEs buffer (at IE boundaries) into short
622 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
624 pos
= bss
->information_elements
;
625 end
= pos
+ bss
->len_information_elements
;
627 while (end
- pos
> IW_GENERIC_IE_MAX
) {
628 next
= pos
+ 2 + pos
[1];
629 while (next
+ 2 + next
[1] - pos
< IW_GENERIC_IE_MAX
)
630 next
= next
+ 2 + next
[1];
632 memset(&iwe
, 0, sizeof(iwe
));
634 iwe
.u
.data
.length
= next
- pos
;
635 *current_ev
= iwe_stream_add_point(info
, *current_ev
,
642 memset(&iwe
, 0, sizeof(iwe
));
644 iwe
.u
.data
.length
= end
- pos
;
645 *current_ev
= iwe_stream_add_point(info
, *current_ev
,
650 static inline unsigned int elapsed_jiffies_msecs(unsigned long start
)
652 unsigned long end
= jiffies
;
655 return jiffies_to_msecs(end
- start
);
657 return jiffies_to_msecs(end
+ (MAX_JIFFY_OFFSET
- start
) + 1);
661 ieee80211_bss(struct wiphy
*wiphy
, struct iw_request_info
*info
,
662 struct cfg80211_internal_bss
*bss
, char *current_ev
,
667 u8
*ie
= bss
->pub
.information_elements
;
668 int rem
= bss
->pub
.len_information_elements
, i
, sig
;
671 memset(&iwe
, 0, sizeof(iwe
));
673 iwe
.u
.ap_addr
.sa_family
= ARPHRD_ETHER
;
674 memcpy(iwe
.u
.ap_addr
.sa_data
, bss
->pub
.bssid
, ETH_ALEN
);
675 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
678 memset(&iwe
, 0, sizeof(iwe
));
679 iwe
.cmd
= SIOCGIWFREQ
;
680 iwe
.u
.freq
.m
= ieee80211_frequency_to_channel(bss
->pub
.channel
->center_freq
);
682 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
685 memset(&iwe
, 0, sizeof(iwe
));
686 iwe
.cmd
= SIOCGIWFREQ
;
687 iwe
.u
.freq
.m
= bss
->pub
.channel
->center_freq
;
689 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
, &iwe
,
692 if (wiphy
->signal_type
!= CFG80211_SIGNAL_TYPE_NONE
) {
693 memset(&iwe
, 0, sizeof(iwe
));
695 iwe
.u
.qual
.updated
= IW_QUAL_LEVEL_UPDATED
|
696 IW_QUAL_NOISE_INVALID
|
697 IW_QUAL_QUAL_UPDATED
;
698 switch (wiphy
->signal_type
) {
699 case CFG80211_SIGNAL_TYPE_MBM
:
700 sig
= bss
->pub
.signal
/ 100;
701 iwe
.u
.qual
.level
= sig
;
702 iwe
.u
.qual
.updated
|= IW_QUAL_DBM
;
703 if (sig
< -110) /* rather bad */
705 else if (sig
> -40) /* perfect */
707 /* will give a range of 0 .. 70 */
708 iwe
.u
.qual
.qual
= sig
+ 110;
710 case CFG80211_SIGNAL_TYPE_UNSPEC
:
711 iwe
.u
.qual
.level
= bss
->pub
.signal
;
712 /* will give range 0 .. 100 */
713 iwe
.u
.qual
.qual
= bss
->pub
.signal
;
719 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
,
720 &iwe
, IW_EV_QUAL_LEN
);
723 memset(&iwe
, 0, sizeof(iwe
));
724 iwe
.cmd
= SIOCGIWENCODE
;
725 if (bss
->pub
.capability
& WLAN_CAPABILITY_PRIVACY
)
726 iwe
.u
.data
.flags
= IW_ENCODE_ENABLED
| IW_ENCODE_NOKEY
;
728 iwe
.u
.data
.flags
= IW_ENCODE_DISABLED
;
729 iwe
.u
.data
.length
= 0;
730 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
740 memset(&iwe
, 0, sizeof(iwe
));
741 iwe
.cmd
= SIOCGIWESSID
;
742 iwe
.u
.data
.length
= ie
[1];
743 iwe
.u
.data
.flags
= 1;
744 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
747 case WLAN_EID_MESH_ID
:
748 memset(&iwe
, 0, sizeof(iwe
));
749 iwe
.cmd
= SIOCGIWESSID
;
750 iwe
.u
.data
.length
= ie
[1];
751 iwe
.u
.data
.flags
= 1;
752 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
755 case WLAN_EID_MESH_CONFIG
:
757 if (ie
[1] != IEEE80211_MESH_CONFIG_LEN
)
759 buf
= kmalloc(50, GFP_ATOMIC
);
763 memset(&iwe
, 0, sizeof(iwe
));
764 iwe
.cmd
= IWEVCUSTOM
;
765 sprintf(buf
, "Mesh network (version %d)", cfg
[0]);
766 iwe
.u
.data
.length
= strlen(buf
);
767 current_ev
= iwe_stream_add_point(info
, current_ev
,
770 sprintf(buf
, "Path Selection Protocol ID: "
771 "0x%02X%02X%02X%02X", cfg
[1], cfg
[2], cfg
[3],
773 iwe
.u
.data
.length
= strlen(buf
);
774 current_ev
= iwe_stream_add_point(info
, current_ev
,
777 sprintf(buf
, "Path Selection Metric ID: "
778 "0x%02X%02X%02X%02X", cfg
[5], cfg
[6], cfg
[7],
780 iwe
.u
.data
.length
= strlen(buf
);
781 current_ev
= iwe_stream_add_point(info
, current_ev
,
784 sprintf(buf
, "Congestion Control Mode ID: "
785 "0x%02X%02X%02X%02X", cfg
[9], cfg
[10],
787 iwe
.u
.data
.length
= strlen(buf
);
788 current_ev
= iwe_stream_add_point(info
, current_ev
,
791 sprintf(buf
, "Channel Precedence: "
792 "0x%02X%02X%02X%02X", cfg
[13], cfg
[14],
794 iwe
.u
.data
.length
= strlen(buf
);
795 current_ev
= iwe_stream_add_point(info
, current_ev
,
800 case WLAN_EID_SUPP_RATES
:
801 case WLAN_EID_EXT_SUPP_RATES
:
802 /* display all supported rates in readable format */
803 p
= current_ev
+ iwe_stream_lcp_len(info
);
805 memset(&iwe
, 0, sizeof(iwe
));
806 iwe
.cmd
= SIOCGIWRATE
;
807 /* Those two flags are ignored... */
808 iwe
.u
.bitrate
.fixed
= iwe
.u
.bitrate
.disabled
= 0;
810 for (i
= 0; i
< ie
[1]; i
++) {
811 iwe
.u
.bitrate
.value
=
812 ((ie
[i
+ 2] & 0x7f) * 500000);
813 p
= iwe_stream_add_value(info
, current_ev
, p
,
814 end_buf
, &iwe
, IW_EV_PARAM_LEN
);
823 if (bss
->pub
.capability
& (WLAN_CAPABILITY_ESS
| WLAN_CAPABILITY_IBSS
)
825 memset(&iwe
, 0, sizeof(iwe
));
826 iwe
.cmd
= SIOCGIWMODE
;
828 iwe
.u
.mode
= IW_MODE_MESH
;
829 else if (bss
->pub
.capability
& WLAN_CAPABILITY_ESS
)
830 iwe
.u
.mode
= IW_MODE_MASTER
;
832 iwe
.u
.mode
= IW_MODE_ADHOC
;
833 current_ev
= iwe_stream_add_event(info
, current_ev
, end_buf
,
834 &iwe
, IW_EV_UINT_LEN
);
837 buf
= kmalloc(30, GFP_ATOMIC
);
839 memset(&iwe
, 0, sizeof(iwe
));
840 iwe
.cmd
= IWEVCUSTOM
;
841 sprintf(buf
, "tsf=%016llx", (unsigned long long)(bss
->pub
.tsf
));
842 iwe
.u
.data
.length
= strlen(buf
);
843 current_ev
= iwe_stream_add_point(info
, current_ev
, end_buf
,
845 memset(&iwe
, 0, sizeof(iwe
));
846 iwe
.cmd
= IWEVCUSTOM
;
847 sprintf(buf
, " Last beacon: %ums ago",
848 elapsed_jiffies_msecs(bss
->ts
));
849 iwe
.u
.data
.length
= strlen(buf
);
850 current_ev
= iwe_stream_add_point(info
, current_ev
,
855 ieee80211_scan_add_ies(info
, &bss
->pub
, ¤t_ev
, end_buf
);
861 static int ieee80211_scan_results(struct cfg80211_registered_device
*dev
,
862 struct iw_request_info
*info
,
863 char *buf
, size_t len
)
865 char *current_ev
= buf
;
866 char *end_buf
= buf
+ len
;
867 struct cfg80211_internal_bss
*bss
;
869 spin_lock_bh(&dev
->bss_lock
);
870 cfg80211_bss_expire(dev
);
872 list_for_each_entry(bss
, &dev
->bss_list
, list
) {
873 if (buf
+ len
- current_ev
<= IW_EV_ADDR_LEN
) {
874 spin_unlock_bh(&dev
->bss_lock
);
877 current_ev
= ieee80211_bss(&dev
->wiphy
, info
, bss
,
878 current_ev
, end_buf
);
880 spin_unlock_bh(&dev
->bss_lock
);
881 return current_ev
- buf
;
885 int cfg80211_wext_giwscan(struct net_device
*dev
,
886 struct iw_request_info
*info
,
887 struct iw_point
*data
, char *extra
)
889 struct cfg80211_registered_device
*rdev
;
892 if (!netif_running(dev
))
895 rdev
= cfg80211_get_dev_from_ifindex(dev
->ifindex
);
898 return PTR_ERR(rdev
);
900 if (rdev
->scan_req
) {
905 res
= ieee80211_scan_results(rdev
, info
, extra
, data
->length
);
913 cfg80211_put_dev(rdev
);
916 EXPORT_SYMBOL(cfg80211_wext_giwscan
);