2 * Some IBSS support code for cfg80211.
4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
7 #include <linux/etherdevice.h>
8 #include <linux/if_arp.h>
9 #include <linux/slab.h>
10 #include <linux/export.h>
11 #include <net/cfg80211.h>
12 #include "wext-compat.h"
16 void __cfg80211_ibss_joined(struct net_device
*dev
, const u8
*bssid
)
18 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
19 struct cfg80211_bss
*bss
;
20 #ifdef CONFIG_CFG80211_WEXT
21 union iwreq_data wrqu
;
24 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
30 bss
= cfg80211_get_bss(wdev
->wiphy
, NULL
, bssid
,
31 wdev
->ssid
, wdev
->ssid_len
,
32 WLAN_CAPABILITY_IBSS
, WLAN_CAPABILITY_IBSS
);
37 if (wdev
->current_bss
) {
38 cfg80211_unhold_bss(wdev
->current_bss
);
39 cfg80211_put_bss(&wdev
->current_bss
->pub
);
42 cfg80211_hold_bss(bss_from_pub(bss
));
43 wdev
->current_bss
= bss_from_pub(bss
);
45 wdev
->sme_state
= CFG80211_SME_CONNECTED
;
46 cfg80211_upload_connect_keys(wdev
);
48 nl80211_send_ibss_bssid(wiphy_to_dev(wdev
->wiphy
), dev
, bssid
,
50 #ifdef CONFIG_CFG80211_WEXT
51 memset(&wrqu
, 0, sizeof(wrqu
));
52 memcpy(wrqu
.ap_addr
.sa_data
, bssid
, ETH_ALEN
);
53 wireless_send_event(dev
, SIOCGIWAP
, &wrqu
, NULL
);
57 void cfg80211_ibss_joined(struct net_device
*dev
, const u8
*bssid
, gfp_t gfp
)
59 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
60 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
61 struct cfg80211_event
*ev
;
64 CFG80211_DEV_WARN_ON(wdev
->sme_state
!= CFG80211_SME_CONNECTING
);
66 ev
= kzalloc(sizeof(*ev
), gfp
);
70 ev
->type
= EVENT_IBSS_JOINED
;
71 memcpy(ev
->cr
.bssid
, bssid
, ETH_ALEN
);
73 spin_lock_irqsave(&wdev
->event_lock
, flags
);
74 list_add_tail(&ev
->list
, &wdev
->event_list
);
75 spin_unlock_irqrestore(&wdev
->event_lock
, flags
);
76 queue_work(cfg80211_wq
, &rdev
->event_work
);
78 EXPORT_SYMBOL(cfg80211_ibss_joined
);
80 int __cfg80211_join_ibss(struct cfg80211_registered_device
*rdev
,
81 struct net_device
*dev
,
82 struct cfg80211_ibss_params
*params
,
83 struct cfg80211_cached_keys
*connkeys
)
85 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
88 ASSERT_WDEV_LOCK(wdev
);
93 if (!params
->basic_rates
) {
95 * If no rates were explicitly configured,
96 * use the mandatory rate set for 11b or
97 * 11a for maximum compatibility.
99 struct ieee80211_supported_band
*sband
=
100 rdev
->wiphy
.bands
[params
->channel
->band
];
102 u32 flag
= params
->channel
->band
== IEEE80211_BAND_5GHZ
?
103 IEEE80211_RATE_MANDATORY_A
:
104 IEEE80211_RATE_MANDATORY_B
;
106 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
107 if (sband
->bitrates
[j
].flags
& flag
)
108 params
->basic_rates
|= BIT(j
);
112 if (WARN_ON(wdev
->connect_keys
))
113 kfree(wdev
->connect_keys
);
114 wdev
->connect_keys
= connkeys
;
116 wdev
->ibss_fixed
= params
->channel_fixed
;
117 #ifdef CONFIG_CFG80211_WEXT
118 wdev
->wext
.ibss
.channel
= params
->channel
;
120 wdev
->sme_state
= CFG80211_SME_CONNECTING
;
122 err
= cfg80211_can_use_chan(rdev
, wdev
, params
->channel
,
123 params
->channel_fixed
125 : CHAN_MODE_EXCLUSIVE
);
127 wdev
->connect_keys
= NULL
;
131 err
= rdev
->ops
->join_ibss(&rdev
->wiphy
, dev
, params
);
133 wdev
->connect_keys
= NULL
;
134 wdev
->sme_state
= CFG80211_SME_IDLE
;
138 memcpy(wdev
->ssid
, params
->ssid
, params
->ssid_len
);
139 wdev
->ssid_len
= params
->ssid_len
;
144 int cfg80211_join_ibss(struct cfg80211_registered_device
*rdev
,
145 struct net_device
*dev
,
146 struct cfg80211_ibss_params
*params
,
147 struct cfg80211_cached_keys
*connkeys
)
149 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
152 mutex_lock(&rdev
->devlist_mtx
);
154 err
= __cfg80211_join_ibss(rdev
, dev
, params
, connkeys
);
156 mutex_unlock(&rdev
->devlist_mtx
);
161 static void __cfg80211_clear_ibss(struct net_device
*dev
, bool nowext
)
163 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
164 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
167 ASSERT_WDEV_LOCK(wdev
);
169 kfree(wdev
->connect_keys
);
170 wdev
->connect_keys
= NULL
;
173 * Delete all the keys ... pairwise keys can't really
174 * exist any more anyway, but default keys might.
176 if (rdev
->ops
->del_key
)
177 for (i
= 0; i
< 6; i
++)
178 rdev
->ops
->del_key(wdev
->wiphy
, dev
, i
, false, NULL
);
180 if (wdev
->current_bss
) {
181 cfg80211_unhold_bss(wdev
->current_bss
);
182 cfg80211_put_bss(&wdev
->current_bss
->pub
);
185 wdev
->current_bss
= NULL
;
186 wdev
->sme_state
= CFG80211_SME_IDLE
;
188 #ifdef CONFIG_CFG80211_WEXT
190 wdev
->wext
.ibss
.ssid_len
= 0;
194 void cfg80211_clear_ibss(struct net_device
*dev
, bool nowext
)
196 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
199 __cfg80211_clear_ibss(dev
, nowext
);
203 int __cfg80211_leave_ibss(struct cfg80211_registered_device
*rdev
,
204 struct net_device
*dev
, bool nowext
)
206 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
209 ASSERT_WDEV_LOCK(wdev
);
214 err
= rdev
->ops
->leave_ibss(&rdev
->wiphy
, dev
);
219 __cfg80211_clear_ibss(dev
, nowext
);
224 int cfg80211_leave_ibss(struct cfg80211_registered_device
*rdev
,
225 struct net_device
*dev
, bool nowext
)
227 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
231 err
= __cfg80211_leave_ibss(rdev
, dev
, nowext
);
237 #ifdef CONFIG_CFG80211_WEXT
238 int cfg80211_ibss_wext_join(struct cfg80211_registered_device
*rdev
,
239 struct wireless_dev
*wdev
)
241 struct cfg80211_cached_keys
*ck
= NULL
;
242 enum ieee80211_band band
;
245 ASSERT_WDEV_LOCK(wdev
);
247 if (!wdev
->wext
.ibss
.beacon_interval
)
248 wdev
->wext
.ibss
.beacon_interval
= 100;
250 /* try to find an IBSS channel if none requested ... */
251 if (!wdev
->wext
.ibss
.channel
) {
252 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
253 struct ieee80211_supported_band
*sband
;
254 struct ieee80211_channel
*chan
;
256 sband
= rdev
->wiphy
.bands
[band
];
260 for (i
= 0; i
< sband
->n_channels
; i
++) {
261 chan
= &sband
->channels
[i
];
262 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
)
264 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
266 wdev
->wext
.ibss
.channel
= chan
;
270 if (wdev
->wext
.ibss
.channel
)
274 if (!wdev
->wext
.ibss
.channel
)
278 /* don't join -- SSID is not there */
279 if (!wdev
->wext
.ibss
.ssid_len
)
282 if (!netif_running(wdev
->netdev
))
285 if (wdev
->wext
.keys
) {
286 wdev
->wext
.keys
->def
= wdev
->wext
.default_key
;
287 wdev
->wext
.keys
->defmgmt
= wdev
->wext
.default_mgmt_key
;
290 wdev
->wext
.ibss
.privacy
= wdev
->wext
.default_key
!= -1;
292 if (wdev
->wext
.keys
) {
293 ck
= kmemdup(wdev
->wext
.keys
, sizeof(*ck
), GFP_KERNEL
);
296 for (i
= 0; i
< 6; i
++)
297 ck
->params
[i
].key
= ck
->data
[i
];
299 err
= __cfg80211_join_ibss(rdev
, wdev
->netdev
,
300 &wdev
->wext
.ibss
, ck
);
307 int cfg80211_ibss_wext_siwfreq(struct net_device
*dev
,
308 struct iw_request_info
*info
,
309 struct iw_freq
*wextfreq
, char *extra
)
311 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
312 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
313 struct ieee80211_channel
*chan
= NULL
;
316 /* call only for ibss! */
317 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
320 if (!rdev
->ops
->join_ibss
)
323 freq
= cfg80211_wext_freq(wdev
->wiphy
, wextfreq
);
328 chan
= ieee80211_get_channel(wdev
->wiphy
, freq
);
331 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
||
332 chan
->flags
& IEEE80211_CHAN_DISABLED
)
336 if (wdev
->wext
.ibss
.channel
== chan
)
342 err
= __cfg80211_leave_ibss(rdev
, dev
, true);
349 wdev
->wext
.ibss
.channel
= chan
;
350 wdev
->wext
.ibss
.channel_fixed
= true;
352 /* cfg80211_ibss_wext_join will pick one if needed */
353 wdev
->wext
.ibss
.channel_fixed
= false;
356 mutex_lock(&rdev
->devlist_mtx
);
358 err
= cfg80211_ibss_wext_join(rdev
, wdev
);
360 mutex_unlock(&rdev
->devlist_mtx
);
365 int cfg80211_ibss_wext_giwfreq(struct net_device
*dev
,
366 struct iw_request_info
*info
,
367 struct iw_freq
*freq
, char *extra
)
369 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
370 struct ieee80211_channel
*chan
= NULL
;
372 /* call only for ibss! */
373 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
377 if (wdev
->current_bss
)
378 chan
= wdev
->current_bss
->pub
.channel
;
379 else if (wdev
->wext
.ibss
.channel
)
380 chan
= wdev
->wext
.ibss
.channel
;
384 freq
->m
= chan
->center_freq
;
389 /* no channel if not joining */
393 int cfg80211_ibss_wext_siwessid(struct net_device
*dev
,
394 struct iw_request_info
*info
,
395 struct iw_point
*data
, char *ssid
)
397 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
398 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
399 size_t len
= data
->length
;
402 /* call only for ibss! */
403 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
406 if (!rdev
->ops
->join_ibss
)
412 err
= __cfg80211_leave_ibss(rdev
, dev
, true);
418 /* iwconfig uses nul termination in SSID.. */
419 if (len
> 0 && ssid
[len
- 1] == '\0')
422 wdev
->wext
.ibss
.ssid
= wdev
->ssid
;
423 memcpy(wdev
->wext
.ibss
.ssid
, ssid
, len
);
424 wdev
->wext
.ibss
.ssid_len
= len
;
426 mutex_lock(&rdev
->devlist_mtx
);
428 err
= cfg80211_ibss_wext_join(rdev
, wdev
);
430 mutex_unlock(&rdev
->devlist_mtx
);
435 int cfg80211_ibss_wext_giwessid(struct net_device
*dev
,
436 struct iw_request_info
*info
,
437 struct iw_point
*data
, char *ssid
)
439 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
441 /* call only for ibss! */
442 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
448 if (wdev
->ssid_len
) {
450 data
->length
= wdev
->ssid_len
;
451 memcpy(ssid
, wdev
->ssid
, data
->length
);
452 } else if (wdev
->wext
.ibss
.ssid
&& wdev
->wext
.ibss
.ssid_len
) {
454 data
->length
= wdev
->wext
.ibss
.ssid_len
;
455 memcpy(ssid
, wdev
->wext
.ibss
.ssid
, data
->length
);
462 int cfg80211_ibss_wext_siwap(struct net_device
*dev
,
463 struct iw_request_info
*info
,
464 struct sockaddr
*ap_addr
, char *extra
)
466 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
467 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
468 u8
*bssid
= ap_addr
->sa_data
;
471 /* call only for ibss! */
472 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
475 if (!rdev
->ops
->join_ibss
)
478 if (ap_addr
->sa_family
!= ARPHRD_ETHER
)
482 if (is_zero_ether_addr(bssid
) || is_broadcast_ether_addr(bssid
))
486 if (!bssid
&& !wdev
->wext
.ibss
.bssid
)
489 /* fixed already - and no change */
490 if (wdev
->wext
.ibss
.bssid
&& bssid
&&
491 ether_addr_equal(bssid
, wdev
->wext
.ibss
.bssid
))
497 err
= __cfg80211_leave_ibss(rdev
, dev
, true);
504 memcpy(wdev
->wext
.bssid
, bssid
, ETH_ALEN
);
505 wdev
->wext
.ibss
.bssid
= wdev
->wext
.bssid
;
507 wdev
->wext
.ibss
.bssid
= NULL
;
509 mutex_lock(&rdev
->devlist_mtx
);
511 err
= cfg80211_ibss_wext_join(rdev
, wdev
);
513 mutex_unlock(&rdev
->devlist_mtx
);
518 int cfg80211_ibss_wext_giwap(struct net_device
*dev
,
519 struct iw_request_info
*info
,
520 struct sockaddr
*ap_addr
, char *extra
)
522 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
524 /* call only for ibss! */
525 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
528 ap_addr
->sa_family
= ARPHRD_ETHER
;
531 if (wdev
->current_bss
)
532 memcpy(ap_addr
->sa_data
, wdev
->current_bss
->pub
.bssid
, ETH_ALEN
);
533 else if (wdev
->wext
.ibss
.bssid
)
534 memcpy(ap_addr
->sa_data
, wdev
->wext
.ibss
.bssid
, ETH_ALEN
);
536 memset(ap_addr
->sa_data
, 0, ETH_ALEN
);