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);