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);