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"
17 void __cfg80211_ibss_joined(struct net_device
*dev
, const u8
*bssid
,
18 struct ieee80211_channel
*channel
)
20 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
21 struct cfg80211_bss
*bss
;
22 #ifdef CONFIG_CFG80211_WEXT
23 union iwreq_data wrqu
;
26 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
32 bss
= cfg80211_get_bss(wdev
->wiphy
, channel
, bssid
, NULL
, 0,
33 WLAN_CAPABILITY_IBSS
, WLAN_CAPABILITY_IBSS
);
38 if (wdev
->current_bss
) {
39 cfg80211_unhold_bss(wdev
->current_bss
);
40 cfg80211_put_bss(wdev
->wiphy
, &wdev
->current_bss
->pub
);
43 cfg80211_hold_bss(bss_from_pub(bss
));
44 wdev
->current_bss
= bss_from_pub(bss
);
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
,
58 struct ieee80211_channel
*channel
, gfp_t gfp
)
60 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
61 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
62 struct cfg80211_event
*ev
;
65 trace_cfg80211_ibss_joined(dev
, bssid
, channel
);
67 if (WARN_ON(!channel
))
70 ev
= kzalloc(sizeof(*ev
), gfp
);
74 ev
->type
= EVENT_IBSS_JOINED
;
75 memcpy(ev
->ij
.bssid
, bssid
, ETH_ALEN
);
76 ev
->ij
.channel
= channel
;
78 spin_lock_irqsave(&wdev
->event_lock
, flags
);
79 list_add_tail(&ev
->list
, &wdev
->event_list
);
80 spin_unlock_irqrestore(&wdev
->event_lock
, flags
);
81 queue_work(cfg80211_wq
, &rdev
->event_work
);
83 EXPORT_SYMBOL(cfg80211_ibss_joined
);
85 static int __cfg80211_join_ibss(struct cfg80211_registered_device
*rdev
,
86 struct net_device
*dev
,
87 struct cfg80211_ibss_params
*params
,
88 struct cfg80211_cached_keys
*connkeys
)
90 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
91 struct ieee80211_channel
*check_chan
;
92 u8 radar_detect_width
= 0;
95 ASSERT_WDEV_LOCK(wdev
);
100 if (!params
->basic_rates
) {
102 * If no rates were explicitly configured,
103 * use the mandatory rate set for 11b or
104 * 11a for maximum compatibility.
106 struct ieee80211_supported_band
*sband
=
107 rdev
->wiphy
.bands
[params
->chandef
.chan
->band
];
109 u32 flag
= params
->chandef
.chan
->band
== IEEE80211_BAND_5GHZ
?
110 IEEE80211_RATE_MANDATORY_A
:
111 IEEE80211_RATE_MANDATORY_B
;
113 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
114 if (sband
->bitrates
[j
].flags
& flag
)
115 params
->basic_rates
|= BIT(j
);
119 if (WARN_ON(wdev
->connect_keys
))
120 kfree(wdev
->connect_keys
);
121 wdev
->connect_keys
= connkeys
;
123 wdev
->ibss_fixed
= params
->channel_fixed
;
124 wdev
->ibss_dfs_possible
= params
->userspace_handles_dfs
;
125 wdev
->chandef
= params
->chandef
;
126 #ifdef CONFIG_CFG80211_WEXT
127 wdev
->wext
.ibss
.chandef
= params
->chandef
;
129 check_chan
= params
->chandef
.chan
;
130 if (params
->userspace_handles_dfs
) {
131 /* Check for radar even if the current channel is not
132 * a radar channel - it might decide to change to DFS
135 radar_detect_width
= BIT(params
->chandef
.width
);
138 err
= cfg80211_can_use_iftype_chan(rdev
, wdev
, wdev
->iftype
,
140 (params
->channel_fixed
&&
143 : CHAN_MODE_EXCLUSIVE
,
147 wdev
->connect_keys
= NULL
;
151 err
= rdev_join_ibss(rdev
, dev
, params
);
153 wdev
->connect_keys
= NULL
;
157 memcpy(wdev
->ssid
, params
->ssid
, params
->ssid_len
);
158 wdev
->ssid_len
= params
->ssid_len
;
163 int cfg80211_join_ibss(struct cfg80211_registered_device
*rdev
,
164 struct net_device
*dev
,
165 struct cfg80211_ibss_params
*params
,
166 struct cfg80211_cached_keys
*connkeys
)
168 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
174 err
= __cfg80211_join_ibss(rdev
, dev
, params
, connkeys
);
180 static void __cfg80211_clear_ibss(struct net_device
*dev
, bool nowext
)
182 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
183 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
186 ASSERT_WDEV_LOCK(wdev
);
188 kfree(wdev
->connect_keys
);
189 wdev
->connect_keys
= NULL
;
191 rdev_set_qos_map(rdev
, dev
, NULL
);
194 * Delete all the keys ... pairwise keys can't really
195 * exist any more anyway, but default keys might.
197 if (rdev
->ops
->del_key
)
198 for (i
= 0; i
< 6; i
++)
199 rdev_del_key(rdev
, dev
, i
, false, NULL
);
201 if (wdev
->current_bss
) {
202 cfg80211_unhold_bss(wdev
->current_bss
);
203 cfg80211_put_bss(wdev
->wiphy
, &wdev
->current_bss
->pub
);
206 wdev
->current_bss
= NULL
;
208 memset(&wdev
->chandef
, 0, sizeof(wdev
->chandef
));
209 #ifdef CONFIG_CFG80211_WEXT
211 wdev
->wext
.ibss
.ssid_len
= 0;
215 void cfg80211_clear_ibss(struct net_device
*dev
, bool nowext
)
217 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
220 __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
;
230 ASSERT_WDEV_LOCK(wdev
);
235 err
= rdev_leave_ibss(rdev
, dev
);
240 __cfg80211_clear_ibss(dev
, nowext
);
245 int cfg80211_leave_ibss(struct cfg80211_registered_device
*rdev
,
246 struct net_device
*dev
, bool nowext
)
248 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
252 err
= __cfg80211_leave_ibss(rdev
, dev
, nowext
);
258 #ifdef CONFIG_CFG80211_WEXT
259 int cfg80211_ibss_wext_join(struct cfg80211_registered_device
*rdev
,
260 struct wireless_dev
*wdev
)
262 struct cfg80211_cached_keys
*ck
= NULL
;
263 enum ieee80211_band band
;
266 ASSERT_WDEV_LOCK(wdev
);
268 if (!wdev
->wext
.ibss
.beacon_interval
)
269 wdev
->wext
.ibss
.beacon_interval
= 100;
271 /* try to find an IBSS channel if none requested ... */
272 if (!wdev
->wext
.ibss
.chandef
.chan
) {
273 struct ieee80211_channel
*new_chan
= NULL
;
275 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
276 struct ieee80211_supported_band
*sband
;
277 struct ieee80211_channel
*chan
;
279 sband
= rdev
->wiphy
.bands
[band
];
283 for (i
= 0; i
< sband
->n_channels
; i
++) {
284 chan
= &sband
->channels
[i
];
285 if (chan
->flags
& IEEE80211_CHAN_NO_IR
)
287 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
300 cfg80211_chandef_create(&wdev
->wext
.ibss
.chandef
, new_chan
,
304 /* don't join -- SSID is not there */
305 if (!wdev
->wext
.ibss
.ssid_len
)
308 if (!netif_running(wdev
->netdev
))
311 if (wdev
->wext
.keys
) {
312 wdev
->wext
.keys
->def
= wdev
->wext
.default_key
;
313 wdev
->wext
.keys
->defmgmt
= wdev
->wext
.default_mgmt_key
;
316 wdev
->wext
.ibss
.privacy
= wdev
->wext
.default_key
!= -1;
318 if (wdev
->wext
.keys
) {
319 ck
= kmemdup(wdev
->wext
.keys
, sizeof(*ck
), GFP_KERNEL
);
322 for (i
= 0; i
< 6; i
++)
323 ck
->params
[i
].key
= ck
->data
[i
];
325 err
= __cfg80211_join_ibss(rdev
, wdev
->netdev
,
326 &wdev
->wext
.ibss
, ck
);
333 int cfg80211_ibss_wext_siwfreq(struct net_device
*dev
,
334 struct iw_request_info
*info
,
335 struct iw_freq
*wextfreq
, char *extra
)
337 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
338 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
339 struct ieee80211_channel
*chan
= NULL
;
342 /* call only for ibss! */
343 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
346 if (!rdev
->ops
->join_ibss
)
349 freq
= cfg80211_wext_freq(wdev
->wiphy
, wextfreq
);
354 chan
= ieee80211_get_channel(wdev
->wiphy
, freq
);
357 if (chan
->flags
& IEEE80211_CHAN_NO_IR
||
358 chan
->flags
& IEEE80211_CHAN_DISABLED
)
362 if (wdev
->wext
.ibss
.chandef
.chan
== chan
)
368 err
= __cfg80211_leave_ibss(rdev
, dev
, true);
375 cfg80211_chandef_create(&wdev
->wext
.ibss
.chandef
, chan
,
377 wdev
->wext
.ibss
.channel_fixed
= true;
379 /* cfg80211_ibss_wext_join will pick one if needed */
380 wdev
->wext
.ibss
.channel_fixed
= false;
384 err
= cfg80211_ibss_wext_join(rdev
, wdev
);
390 int cfg80211_ibss_wext_giwfreq(struct net_device
*dev
,
391 struct iw_request_info
*info
,
392 struct iw_freq
*freq
, char *extra
)
394 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
395 struct ieee80211_channel
*chan
= NULL
;
397 /* call only for ibss! */
398 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
402 if (wdev
->current_bss
)
403 chan
= wdev
->current_bss
->pub
.channel
;
404 else if (wdev
->wext
.ibss
.chandef
.chan
)
405 chan
= wdev
->wext
.ibss
.chandef
.chan
;
409 freq
->m
= chan
->center_freq
;
414 /* no channel if not joining */
418 int cfg80211_ibss_wext_siwessid(struct net_device
*dev
,
419 struct iw_request_info
*info
,
420 struct iw_point
*data
, char *ssid
)
422 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
423 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
424 size_t len
= data
->length
;
427 /* call only for ibss! */
428 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
431 if (!rdev
->ops
->join_ibss
)
437 err
= __cfg80211_leave_ibss(rdev
, dev
, true);
443 /* iwconfig uses nul termination in SSID.. */
444 if (len
> 0 && ssid
[len
- 1] == '\0')
447 wdev
->wext
.ibss
.ssid
= wdev
->ssid
;
448 memcpy(wdev
->wext
.ibss
.ssid
, ssid
, len
);
449 wdev
->wext
.ibss
.ssid_len
= len
;
452 err
= cfg80211_ibss_wext_join(rdev
, wdev
);
458 int cfg80211_ibss_wext_giwessid(struct net_device
*dev
,
459 struct iw_request_info
*info
,
460 struct iw_point
*data
, char *ssid
)
462 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
464 /* call only for ibss! */
465 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
471 if (wdev
->ssid_len
) {
473 data
->length
= wdev
->ssid_len
;
474 memcpy(ssid
, wdev
->ssid
, data
->length
);
475 } else if (wdev
->wext
.ibss
.ssid
&& wdev
->wext
.ibss
.ssid_len
) {
477 data
->length
= wdev
->wext
.ibss
.ssid_len
;
478 memcpy(ssid
, wdev
->wext
.ibss
.ssid
, data
->length
);
485 int cfg80211_ibss_wext_siwap(struct net_device
*dev
,
486 struct iw_request_info
*info
,
487 struct sockaddr
*ap_addr
, char *extra
)
489 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
490 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
491 u8
*bssid
= ap_addr
->sa_data
;
494 /* call only for ibss! */
495 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
498 if (!rdev
->ops
->join_ibss
)
501 if (ap_addr
->sa_family
!= ARPHRD_ETHER
)
505 if (is_zero_ether_addr(bssid
) || is_broadcast_ether_addr(bssid
))
509 if (!bssid
&& !wdev
->wext
.ibss
.bssid
)
512 /* fixed already - and no change */
513 if (wdev
->wext
.ibss
.bssid
&& bssid
&&
514 ether_addr_equal(bssid
, wdev
->wext
.ibss
.bssid
))
520 err
= __cfg80211_leave_ibss(rdev
, dev
, true);
527 memcpy(wdev
->wext
.bssid
, bssid
, ETH_ALEN
);
528 wdev
->wext
.ibss
.bssid
= wdev
->wext
.bssid
;
530 wdev
->wext
.ibss
.bssid
= NULL
;
533 err
= cfg80211_ibss_wext_join(rdev
, wdev
);
539 int cfg80211_ibss_wext_giwap(struct net_device
*dev
,
540 struct iw_request_info
*info
,
541 struct sockaddr
*ap_addr
, char *extra
)
543 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
545 /* call only for ibss! */
546 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_ADHOC
))
549 ap_addr
->sa_family
= ARPHRD_ETHER
;
552 if (wdev
->current_bss
)
553 memcpy(ap_addr
->sa_data
, wdev
->current_bss
->pub
.bssid
, ETH_ALEN
);
554 else if (wdev
->wext
.ibss
.bssid
)
555 memcpy(ap_addr
->sa_data
, wdev
->wext
.ibss
.bssid
, ETH_ALEN
);
557 memset(ap_addr
->sa_data
, 0, ETH_ALEN
);