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 <net/cfg80211.h>
11 #include "wext-compat.h"
15 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
17 struct wireless_dev *wdev = dev->ieee80211_ptr;
18 struct cfg80211_bss *bss;
19 #ifdef CONFIG_CFG80211_WEXT
20 union iwreq_data wrqu;
23 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
29 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
30 wdev->ssid, wdev->ssid_len,
31 WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
36 if (wdev->current_bss) {
37 cfg80211_unhold_bss(wdev->current_bss);
38 cfg80211_put_bss(&wdev->current_bss->pub);
41 cfg80211_hold_bss(bss_from_pub(bss));
42 wdev->current_bss = bss_from_pub(bss);
44 cfg80211_upload_connect_keys(wdev);
46 nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
48 #ifdef CONFIG_CFG80211_WEXT
49 memset(&wrqu, 0, sizeof(wrqu));
50 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
51 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
55 void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
57 struct wireless_dev *wdev = dev->ieee80211_ptr;
58 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
59 struct cfg80211_event *ev;
62 CFG80211_DEV_WARN_ON(!wdev->ssid_len);
64 ev = kzalloc(sizeof(*ev), gfp);
68 ev->type = EVENT_IBSS_JOINED;
69 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
71 spin_lock_irqsave(&wdev->event_lock, flags);
72 list_add_tail(&ev->list, &wdev->event_list);
73 spin_unlock_irqrestore(&wdev->event_lock, flags);
74 queue_work(cfg80211_wq, &rdev->event_work);
76 EXPORT_SYMBOL(cfg80211_ibss_joined);
78 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
79 struct net_device *dev,
80 struct cfg80211_ibss_params *params,
81 struct cfg80211_cached_keys *connkeys)
83 struct wireless_dev *wdev = dev->ieee80211_ptr;
86 ASSERT_WDEV_LOCK(wdev);
91 if (WARN_ON(wdev->connect_keys))
92 kfree(wdev->connect_keys);
93 wdev->connect_keys = connkeys;
95 #ifdef CONFIG_CFG80211_WEXT
96 wdev->wext.ibss.channel = params->channel;
98 err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
100 wdev->connect_keys = NULL;
104 memcpy(wdev->ssid, params->ssid, params->ssid_len);
105 wdev->ssid_len = params->ssid_len;
110 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
111 struct net_device *dev,
112 struct cfg80211_ibss_params *params,
113 struct cfg80211_cached_keys *connkeys)
115 struct wireless_dev *wdev = dev->ieee80211_ptr;
118 mutex_lock(&rdev->devlist_mtx);
120 err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
122 mutex_unlock(&rdev->devlist_mtx);
127 static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
129 struct wireless_dev *wdev = dev->ieee80211_ptr;
130 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
133 ASSERT_WDEV_LOCK(wdev);
135 kfree(wdev->connect_keys);
136 wdev->connect_keys = NULL;
139 * Delete all the keys ... pairwise keys can't really
140 * exist any more anyway, but default keys might.
142 if (rdev->ops->del_key)
143 for (i = 0; i < 6; i++)
144 rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
146 if (wdev->current_bss) {
147 cfg80211_unhold_bss(wdev->current_bss);
148 cfg80211_put_bss(&wdev->current_bss->pub);
151 wdev->current_bss = NULL;
153 #ifdef CONFIG_CFG80211_WEXT
155 wdev->wext.ibss.ssid_len = 0;
159 void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
161 struct wireless_dev *wdev = dev->ieee80211_ptr;
164 __cfg80211_clear_ibss(dev, nowext);
168 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
169 struct net_device *dev, bool nowext)
171 struct wireless_dev *wdev = dev->ieee80211_ptr;
174 ASSERT_WDEV_LOCK(wdev);
179 err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
184 __cfg80211_clear_ibss(dev, nowext);
189 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
190 struct net_device *dev, bool nowext)
192 struct wireless_dev *wdev = dev->ieee80211_ptr;
196 err = __cfg80211_leave_ibss(rdev, dev, nowext);
202 #ifdef CONFIG_CFG80211_WEXT
203 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
204 struct wireless_dev *wdev)
206 struct cfg80211_cached_keys *ck = NULL;
207 enum ieee80211_band band;
210 ASSERT_WDEV_LOCK(wdev);
212 if (!wdev->wext.ibss.beacon_interval)
213 wdev->wext.ibss.beacon_interval = 100;
215 /* try to find an IBSS channel if none requested ... */
216 if (!wdev->wext.ibss.channel) {
217 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
218 struct ieee80211_supported_band *sband;
219 struct ieee80211_channel *chan;
221 sband = rdev->wiphy.bands[band];
225 for (i = 0; i < sband->n_channels; i++) {
226 chan = &sband->channels[i];
227 if (chan->flags & IEEE80211_CHAN_NO_IBSS)
229 if (chan->flags & IEEE80211_CHAN_DISABLED)
231 wdev->wext.ibss.channel = chan;
235 if (wdev->wext.ibss.channel)
239 if (!wdev->wext.ibss.channel)
243 /* don't join -- SSID is not there */
244 if (!wdev->wext.ibss.ssid_len)
247 if (!netif_running(wdev->netdev))
251 wdev->wext.keys->def = wdev->wext.default_key;
253 wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
255 if (wdev->wext.keys) {
256 ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
259 for (i = 0; i < 6; i++)
260 ck->params[i].key = ck->data[i];
262 err = __cfg80211_join_ibss(rdev, wdev->netdev,
263 &wdev->wext.ibss, ck);
270 int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
271 struct iw_request_info *info,
272 struct iw_freq *wextfreq, char *extra)
274 struct wireless_dev *wdev = dev->ieee80211_ptr;
275 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
276 struct ieee80211_channel *chan = NULL;
279 /* call only for ibss! */
280 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
283 if (!rdev->ops->join_ibss)
286 freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
291 chan = ieee80211_get_channel(wdev->wiphy, freq);
294 if (chan->flags & IEEE80211_CHAN_NO_IBSS ||
295 chan->flags & IEEE80211_CHAN_DISABLED)
299 if (wdev->wext.ibss.channel == chan)
305 err = __cfg80211_leave_ibss(rdev, dev, true);
312 wdev->wext.ibss.channel = chan;
313 wdev->wext.ibss.channel_fixed = true;
315 /* cfg80211_ibss_wext_join will pick one if needed */
316 wdev->wext.ibss.channel_fixed = false;
319 mutex_lock(&rdev->devlist_mtx);
321 err = cfg80211_ibss_wext_join(rdev, wdev);
323 mutex_unlock(&rdev->devlist_mtx);
328 int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
329 struct iw_request_info *info,
330 struct iw_freq *freq, char *extra)
332 struct wireless_dev *wdev = dev->ieee80211_ptr;
333 struct ieee80211_channel *chan = NULL;
335 /* call only for ibss! */
336 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
340 if (wdev->current_bss)
341 chan = wdev->current_bss->pub.channel;
342 else if (wdev->wext.ibss.channel)
343 chan = wdev->wext.ibss.channel;
347 freq->m = chan->center_freq;
352 /* no channel if not joining */
356 int cfg80211_ibss_wext_siwessid(struct net_device *dev,
357 struct iw_request_info *info,
358 struct iw_point *data, char *ssid)
360 struct wireless_dev *wdev = dev->ieee80211_ptr;
361 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
362 size_t len = data->length;
365 /* call only for ibss! */
366 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
369 if (!rdev->ops->join_ibss)
375 err = __cfg80211_leave_ibss(rdev, dev, true);
381 /* iwconfig uses nul termination in SSID.. */
382 if (len > 0 && ssid[len - 1] == '\0')
385 wdev->wext.ibss.ssid = wdev->ssid;
386 memcpy(wdev->wext.ibss.ssid, ssid, len);
387 wdev->wext.ibss.ssid_len = len;
389 mutex_lock(&rdev->devlist_mtx);
391 err = cfg80211_ibss_wext_join(rdev, wdev);
393 mutex_unlock(&rdev->devlist_mtx);
398 int cfg80211_ibss_wext_giwessid(struct net_device *dev,
399 struct iw_request_info *info,
400 struct iw_point *data, char *ssid)
402 struct wireless_dev *wdev = dev->ieee80211_ptr;
404 /* call only for ibss! */
405 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
411 if (wdev->ssid_len) {
413 data->length = wdev->ssid_len;
414 memcpy(ssid, wdev->ssid, data->length);
415 } else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
417 data->length = wdev->wext.ibss.ssid_len;
418 memcpy(ssid, wdev->wext.ibss.ssid, data->length);
425 int cfg80211_ibss_wext_siwap(struct net_device *dev,
426 struct iw_request_info *info,
427 struct sockaddr *ap_addr, char *extra)
429 struct wireless_dev *wdev = dev->ieee80211_ptr;
430 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
431 u8 *bssid = ap_addr->sa_data;
434 /* call only for ibss! */
435 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
438 if (!rdev->ops->join_ibss)
441 if (ap_addr->sa_family != ARPHRD_ETHER)
445 if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
449 if (!bssid && !wdev->wext.ibss.bssid)
452 /* fixed already - and no change */
453 if (wdev->wext.ibss.bssid && bssid &&
454 compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
460 err = __cfg80211_leave_ibss(rdev, dev, true);
467 memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
468 wdev->wext.ibss.bssid = wdev->wext.bssid;
470 wdev->wext.ibss.bssid = NULL;
472 mutex_lock(&rdev->devlist_mtx);
474 err = cfg80211_ibss_wext_join(rdev, wdev);
476 mutex_unlock(&rdev->devlist_mtx);
481 int cfg80211_ibss_wext_giwap(struct net_device *dev,
482 struct iw_request_info *info,
483 struct sockaddr *ap_addr, char *extra)
485 struct wireless_dev *wdev = dev->ieee80211_ptr;
487 /* call only for ibss! */
488 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
491 ap_addr->sa_family = ARPHRD_ETHER;
494 if (wdev->current_bss)
495 memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
496 else if (wdev->wext.ibss.bssid)
497 memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
499 memset(ap_addr->sa_data, 0, ETH_ALEN);