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 <net/cfg80211.h>
10 #include "wext-compat.h"
14 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
16 struct wireless_dev *wdev = dev->ieee80211_ptr;
17 struct cfg80211_bss *bss;
18 #ifdef CONFIG_WIRELESS_EXT
19 union iwreq_data wrqu;
22 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
25 if (WARN_ON(!wdev->ssid_len))
28 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
29 wdev->ssid, wdev->ssid_len,
30 WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
35 if (wdev->current_bss) {
36 cfg80211_unhold_bss(wdev->current_bss);
37 cfg80211_put_bss(&wdev->current_bss->pub);
40 cfg80211_hold_bss(bss_from_pub(bss));
41 wdev->current_bss = bss_from_pub(bss);
43 cfg80211_upload_connect_keys(wdev);
45 nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
47 #ifdef CONFIG_WIRELESS_EXT
48 memset(&wrqu, 0, sizeof(wrqu));
49 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
50 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
54 void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
56 struct wireless_dev *wdev = dev->ieee80211_ptr;
57 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
58 struct cfg80211_event *ev;
61 ev = kzalloc(sizeof(*ev), gfp);
65 ev->type = EVENT_IBSS_JOINED;
66 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
68 spin_lock_irqsave(&wdev->event_lock, flags);
69 list_add_tail(&ev->list, &wdev->event_list);
70 spin_unlock_irqrestore(&wdev->event_lock, flags);
71 schedule_work(&rdev->event_work);
73 EXPORT_SYMBOL(cfg80211_ibss_joined);
75 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
76 struct net_device *dev,
77 struct cfg80211_ibss_params *params,
78 struct cfg80211_cached_keys *connkeys)
80 struct wireless_dev *wdev = dev->ieee80211_ptr;
83 ASSERT_WDEV_LOCK(wdev);
88 if (WARN_ON(wdev->connect_keys))
89 kfree(wdev->connect_keys);
90 wdev->connect_keys = connkeys;
92 #ifdef CONFIG_WIRELESS_EXT
93 wdev->wext.ibss.channel = params->channel;
95 err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
97 wdev->connect_keys = NULL;
101 memcpy(wdev->ssid, params->ssid, params->ssid_len);
102 wdev->ssid_len = params->ssid_len;
107 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
108 struct net_device *dev,
109 struct cfg80211_ibss_params *params,
110 struct cfg80211_cached_keys *connkeys)
112 struct wireless_dev *wdev = dev->ieee80211_ptr;
116 err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
122 static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
124 struct wireless_dev *wdev = dev->ieee80211_ptr;
125 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
128 ASSERT_WDEV_LOCK(wdev);
130 kfree(wdev->connect_keys);
131 wdev->connect_keys = NULL;
134 * Delete all the keys ... pairwise keys can't really
135 * exist any more anyway, but default keys might.
137 if (rdev->ops->del_key)
138 for (i = 0; i < 6; i++)
139 rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
141 if (wdev->current_bss) {
142 cfg80211_unhold_bss(wdev->current_bss);
143 cfg80211_put_bss(&wdev->current_bss->pub);
146 wdev->current_bss = NULL;
148 #ifdef CONFIG_WIRELESS_EXT
150 wdev->wext.ibss.ssid_len = 0;
154 void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
156 struct wireless_dev *wdev = dev->ieee80211_ptr;
159 __cfg80211_clear_ibss(dev, nowext);
163 static int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
164 struct net_device *dev, bool nowext)
166 struct wireless_dev *wdev = dev->ieee80211_ptr;
169 ASSERT_WDEV_LOCK(wdev);
174 err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
179 __cfg80211_clear_ibss(dev, nowext);
184 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
185 struct net_device *dev, bool nowext)
187 struct wireless_dev *wdev = dev->ieee80211_ptr;
191 err = __cfg80211_leave_ibss(rdev, dev, nowext);
197 #ifdef CONFIG_WIRELESS_EXT
198 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
199 struct wireless_dev *wdev)
201 struct cfg80211_cached_keys *ck = NULL;
202 enum ieee80211_band band;
205 ASSERT_WDEV_LOCK(wdev);
207 if (!wdev->wext.ibss.beacon_interval)
208 wdev->wext.ibss.beacon_interval = 100;
210 /* try to find an IBSS channel if none requested ... */
211 if (!wdev->wext.ibss.channel) {
212 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
213 struct ieee80211_supported_band *sband;
214 struct ieee80211_channel *chan;
216 sband = rdev->wiphy.bands[band];
220 for (i = 0; i < sband->n_channels; i++) {
221 chan = &sband->channels[i];
222 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
224 if (chan->flags & IEEE80211_CHAN_DISABLED)
226 wdev->wext.ibss.channel = chan;
230 if (wdev->wext.ibss.channel)
234 if (!wdev->wext.ibss.channel)
238 /* don't join -- SSID is not there */
239 if (!wdev->wext.ibss.ssid_len)
242 if (!netif_running(wdev->netdev))
246 wdev->wext.keys->def = wdev->wext.default_key;
248 wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
250 if (wdev->wext.keys) {
251 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
254 for (i = 0; i < 6; i++)
255 ck->params[i].key = ck->data[i];
257 err = __cfg80211_join_ibss(rdev, wdev->netdev,
258 &wdev->wext.ibss, ck);
265 int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
266 struct iw_request_info *info,
267 struct iw_freq *freq, char *extra)
269 struct wireless_dev *wdev = dev->ieee80211_ptr;
270 struct ieee80211_channel *chan;
273 /* call only for ibss! */
274 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
277 if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
280 chan = cfg80211_wext_freq(wdev->wiphy, freq);
281 if (chan && IS_ERR(chan))
282 return PTR_ERR(chan);
285 (chan->flags & IEEE80211_CHAN_NO_IBSS ||
286 chan->flags & IEEE80211_CHAN_DISABLED))
289 if (wdev->wext.ibss.channel == chan)
295 err = __cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
303 wdev->wext.ibss.channel = chan;
304 wdev->wext.ibss.channel_fixed = true;
306 /* cfg80211_ibss_wext_join will pick one if needed */
307 wdev->wext.ibss.channel_fixed = false;
311 err = cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
317 int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
318 struct iw_request_info *info,
319 struct iw_freq *freq, char *extra)
321 struct wireless_dev *wdev = dev->ieee80211_ptr;
322 struct ieee80211_channel *chan = NULL;
324 /* call only for ibss! */
325 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
329 if (wdev->current_bss)
330 chan = wdev->current_bss->pub.channel;
331 else if (wdev->wext.ibss.channel)
332 chan = wdev->wext.ibss.channel;
336 freq->m = chan->center_freq;
341 /* no channel if not joining */
345 int cfg80211_ibss_wext_siwessid(struct net_device *dev,
346 struct iw_request_info *info,
347 struct iw_point *data, char *ssid)
349 struct wireless_dev *wdev = dev->ieee80211_ptr;
350 size_t len = data->length;
353 /* call only for ibss! */
354 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
357 if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
363 err = __cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
370 /* iwconfig uses nul termination in SSID.. */
371 if (len > 0 && ssid[len - 1] == '\0')
374 wdev->wext.ibss.ssid = wdev->ssid;
375 memcpy(wdev->wext.ibss.ssid, ssid, len);
376 wdev->wext.ibss.ssid_len = len;
379 err = cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
384 /* temporary symbol - mark GPL - in the future the handler won't be */
385 EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwessid);
387 int cfg80211_ibss_wext_giwessid(struct net_device *dev,
388 struct iw_request_info *info,
389 struct iw_point *data, char *ssid)
391 struct wireless_dev *wdev = dev->ieee80211_ptr;
393 /* call only for ibss! */
394 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
400 if (wdev->ssid_len) {
402 data->length = wdev->ssid_len;
403 memcpy(ssid, wdev->ssid, data->length);
404 } else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
406 data->length = wdev->wext.ibss.ssid_len;
407 memcpy(ssid, wdev->wext.ibss.ssid, data->length);
413 /* temporary symbol - mark GPL - in the future the handler won't be */
414 EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwessid);
416 int cfg80211_ibss_wext_siwap(struct net_device *dev,
417 struct iw_request_info *info,
418 struct sockaddr *ap_addr, char *extra)
420 struct wireless_dev *wdev = dev->ieee80211_ptr;
421 u8 *bssid = ap_addr->sa_data;
424 /* call only for ibss! */
425 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
428 if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
431 if (ap_addr->sa_family != ARPHRD_ETHER)
435 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
439 if (!bssid && !wdev->wext.ibss.bssid)
442 /* fixed already - and no change */
443 if (wdev->wext.ibss.bssid && bssid &&
444 compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
450 err = __cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
458 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
459 wdev->wext.ibss.bssid = wdev->wext.bssid;
461 wdev->wext.ibss.bssid = NULL;
464 err = cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
470 int cfg80211_ibss_wext_giwap(struct net_device *dev,
471 struct iw_request_info *info,
472 struct sockaddr *ap_addr, char *extra)
474 struct wireless_dev *wdev = dev->ieee80211_ptr;
476 /* call only for ibss! */
477 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
480 ap_addr->sa_family = ARPHRD_ETHER;
483 if (wdev->current_bss)
484 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
485 else if (wdev->wext.ibss.bssid)
486 memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
488 memset(ap_addr->sa_data, 0, ETH_ALEN);