2 * cfg80211 MLME SAP interface
4 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/etherdevice.h>
10 #include <linux/netdevice.h>
11 #include <linux/nl80211.h>
12 #include <linux/slab.h>
13 #include <linux/wireless.h>
14 #include <net/cfg80211.h>
15 #include <net/iw_handler.h>
21 void cfg80211_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss,
22 const u8 *buf, size_t len, int uapsd_queues)
24 struct wireless_dev *wdev = dev->ieee80211_ptr;
25 struct wiphy *wiphy = wdev->wiphy;
26 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
27 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
28 u8 *ie = mgmt->u.assoc_resp.variable;
29 int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
30 u16 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
32 trace_cfg80211_send_rx_assoc(dev, bss);
35 * This is a bit of a hack, we don't notify userspace of
36 * a (re-)association reply if we tried to send a reassoc
37 * and got a reject -- we only try again with an assoc
38 * frame instead of reassoc.
40 if (cfg80211_sme_rx_assoc_resp(wdev, status_code)) {
41 cfg80211_unhold_bss(bss_from_pub(bss));
42 cfg80211_put_bss(wiphy, bss);
46 nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL, uapsd_queues);
47 /* update current_bss etc., consumes the bss reference */
48 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
50 status_code == WLAN_STATUS_SUCCESS, bss);
52 EXPORT_SYMBOL(cfg80211_rx_assoc_resp);
54 static void cfg80211_process_auth(struct wireless_dev *wdev,
55 const u8 *buf, size_t len)
57 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
59 nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
60 cfg80211_sme_rx_auth(wdev, buf, len);
63 static void cfg80211_process_deauth(struct wireless_dev *wdev,
64 const u8 *buf, size_t len)
66 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
67 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
68 const u8 *bssid = mgmt->bssid;
69 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
70 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
72 nl80211_send_deauth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
74 if (!wdev->current_bss ||
75 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
78 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
79 cfg80211_sme_deauth(wdev);
82 static void cfg80211_process_disassoc(struct wireless_dev *wdev,
83 const u8 *buf, size_t len)
85 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
86 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
87 const u8 *bssid = mgmt->bssid;
88 u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
89 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
91 nl80211_send_disassoc(rdev, wdev->netdev, buf, len, GFP_KERNEL);
93 if (WARN_ON(!wdev->current_bss ||
94 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
97 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
98 cfg80211_sme_disassoc(wdev);
101 void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
103 struct wireless_dev *wdev = dev->ieee80211_ptr;
104 struct ieee80211_mgmt *mgmt = (void *)buf;
106 ASSERT_WDEV_LOCK(wdev);
108 trace_cfg80211_rx_mlme_mgmt(dev, buf, len);
110 if (WARN_ON(len < 2))
113 if (ieee80211_is_auth(mgmt->frame_control))
114 cfg80211_process_auth(wdev, buf, len);
115 else if (ieee80211_is_deauth(mgmt->frame_control))
116 cfg80211_process_deauth(wdev, buf, len);
117 else if (ieee80211_is_disassoc(mgmt->frame_control))
118 cfg80211_process_disassoc(wdev, buf, len);
120 EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt);
122 void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr)
124 struct wireless_dev *wdev = dev->ieee80211_ptr;
125 struct wiphy *wiphy = wdev->wiphy;
126 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
128 trace_cfg80211_send_auth_timeout(dev, addr);
130 nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
131 cfg80211_sme_auth_timeout(wdev);
133 EXPORT_SYMBOL(cfg80211_auth_timeout);
135 void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss)
137 struct wireless_dev *wdev = dev->ieee80211_ptr;
138 struct wiphy *wiphy = wdev->wiphy;
139 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
141 trace_cfg80211_send_assoc_timeout(dev, bss->bssid);
143 nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL);
144 cfg80211_sme_assoc_timeout(wdev);
146 cfg80211_unhold_bss(bss_from_pub(bss));
147 cfg80211_put_bss(wiphy, bss);
149 EXPORT_SYMBOL(cfg80211_assoc_timeout);
151 void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
153 struct wireless_dev *wdev = dev->ieee80211_ptr;
154 struct ieee80211_mgmt *mgmt = (void *)buf;
156 ASSERT_WDEV_LOCK(wdev);
158 trace_cfg80211_tx_mlme_mgmt(dev, buf, len);
160 if (WARN_ON(len < 2))
163 if (ieee80211_is_deauth(mgmt->frame_control))
164 cfg80211_process_deauth(wdev, buf, len);
166 cfg80211_process_disassoc(wdev, buf, len);
168 EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt);
170 void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
171 enum nl80211_key_type key_type, int key_id,
172 const u8 *tsc, gfp_t gfp)
174 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
175 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
176 #ifdef CONFIG_CFG80211_WEXT
177 union iwreq_data wrqu;
178 char *buf = kmalloc(128, gfp);
181 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
182 "keyid=%d %scast addr=%pM)", key_id,
183 key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
185 memset(&wrqu, 0, sizeof(wrqu));
186 wrqu.data.length = strlen(buf);
187 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
192 trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
193 nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
195 EXPORT_SYMBOL(cfg80211_michael_mic_failure);
197 /* some MLME handling for userspace SME */
198 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
199 struct net_device *dev,
200 struct ieee80211_channel *chan,
201 enum nl80211_auth_type auth_type,
203 const u8 *ssid, int ssid_len,
204 const u8 *ie, int ie_len,
205 const u8 *key, int key_len, int key_idx,
206 const u8 *sae_data, int sae_data_len)
208 struct wireless_dev *wdev = dev->ieee80211_ptr;
209 struct cfg80211_auth_request req = {
212 .sae_data = sae_data,
213 .sae_data_len = sae_data_len,
214 .auth_type = auth_type,
221 ASSERT_WDEV_LOCK(wdev);
223 if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
224 if (!key || !key_len || key_idx < 0 || key_idx > 4)
227 if (wdev->current_bss &&
228 ether_addr_equal(bssid, wdev->current_bss->pub.bssid))
231 req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
232 IEEE80211_BSS_TYPE_ESS,
233 IEEE80211_PRIVACY_ANY);
237 err = rdev_auth(rdev, dev, &req);
239 cfg80211_put_bss(&rdev->wiphy, req.bss);
243 /* Do a logical ht_capa &= ht_capa_mask. */
244 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
245 const struct ieee80211_ht_cap *ht_capa_mask)
250 memset(ht_capa, 0, sizeof(*ht_capa));
255 p2 = (u8*)(ht_capa_mask);
256 for (i = 0; i<sizeof(*ht_capa); i++)
260 /* Do a logical ht_capa &= ht_capa_mask. */
261 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
262 const struct ieee80211_vht_cap *vht_capa_mask)
266 if (!vht_capa_mask) {
267 memset(vht_capa, 0, sizeof(*vht_capa));
271 p1 = (u8*)(vht_capa);
272 p2 = (u8*)(vht_capa_mask);
273 for (i = 0; i < sizeof(*vht_capa); i++)
277 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
278 struct net_device *dev,
279 struct ieee80211_channel *chan,
281 const u8 *ssid, int ssid_len,
282 struct cfg80211_assoc_request *req)
284 struct wireless_dev *wdev = dev->ieee80211_ptr;
287 ASSERT_WDEV_LOCK(wdev);
289 if (wdev->current_bss &&
290 (!req->prev_bssid || !ether_addr_equal(wdev->current_bss->pub.bssid,
294 cfg80211_oper_and_ht_capa(&req->ht_capa_mask,
295 rdev->wiphy.ht_capa_mod_mask);
296 cfg80211_oper_and_vht_capa(&req->vht_capa_mask,
297 rdev->wiphy.vht_capa_mod_mask);
299 req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
300 IEEE80211_BSS_TYPE_ESS,
301 IEEE80211_PRIVACY_ANY);
305 err = rdev_assoc(rdev, dev, req);
307 cfg80211_hold_bss(bss_from_pub(req->bss));
309 cfg80211_put_bss(&rdev->wiphy, req->bss);
314 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
315 struct net_device *dev, const u8 *bssid,
316 const u8 *ie, int ie_len, u16 reason,
317 bool local_state_change)
319 struct wireless_dev *wdev = dev->ieee80211_ptr;
320 struct cfg80211_deauth_request req = {
322 .reason_code = reason,
325 .local_state_change = local_state_change,
328 ASSERT_WDEV_LOCK(wdev);
330 if (local_state_change &&
331 (!wdev->current_bss ||
332 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
335 return rdev_deauth(rdev, dev, &req);
338 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
339 struct net_device *dev, const u8 *bssid,
340 const u8 *ie, int ie_len, u16 reason,
341 bool local_state_change)
343 struct wireless_dev *wdev = dev->ieee80211_ptr;
344 struct cfg80211_disassoc_request req = {
345 .reason_code = reason,
346 .local_state_change = local_state_change,
352 ASSERT_WDEV_LOCK(wdev);
354 if (!wdev->current_bss)
357 if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
358 req.bss = &wdev->current_bss->pub;
362 err = rdev_disassoc(rdev, dev, &req);
366 /* driver should have reported the disassoc */
367 WARN_ON(wdev->current_bss);
371 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
372 struct net_device *dev)
374 struct wireless_dev *wdev = dev->ieee80211_ptr;
377 ASSERT_WDEV_LOCK(wdev);
379 if (!rdev->ops->deauth)
382 if (!wdev->current_bss)
385 memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
386 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
387 WLAN_REASON_DEAUTH_LEAVING, false);
390 struct cfg80211_mgmt_registration {
391 struct list_head list;
402 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
403 u16 frame_type, const u8 *match_data,
406 struct wiphy *wiphy = wdev->wiphy;
407 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
408 struct cfg80211_mgmt_registration *reg, *nreg;
412 if (!wdev->wiphy->mgmt_stypes)
415 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
418 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
421 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
422 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
425 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
429 spin_lock_bh(&wdev->mgmt_registrations_lock);
431 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
432 int mlen = min(match_len, reg->match_len);
434 if (frame_type != le16_to_cpu(reg->frame_type))
437 if (memcmp(reg->match, match_data, mlen) == 0) {
448 memcpy(nreg->match, match_data, match_len);
449 nreg->match_len = match_len;
450 nreg->nlportid = snd_portid;
451 nreg->frame_type = cpu_to_le16(frame_type);
452 list_add(&nreg->list, &wdev->mgmt_registrations);
454 if (rdev->ops->mgmt_frame_register)
455 rdev_mgmt_frame_register(rdev, wdev, frame_type, true);
458 spin_unlock_bh(&wdev->mgmt_registrations_lock);
463 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
465 struct wiphy *wiphy = wdev->wiphy;
466 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
467 struct cfg80211_mgmt_registration *reg, *tmp;
469 spin_lock_bh(&wdev->mgmt_registrations_lock);
471 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
472 if (reg->nlportid != nlportid)
475 if (rdev->ops->mgmt_frame_register) {
476 u16 frame_type = le16_to_cpu(reg->frame_type);
478 rdev_mgmt_frame_register(rdev, wdev,
482 list_del(®->list);
486 spin_unlock_bh(&wdev->mgmt_registrations_lock);
488 if (nlportid && rdev->crit_proto_nlportid == nlportid) {
489 rdev->crit_proto_nlportid = 0;
490 rdev_crit_proto_stop(rdev, wdev);
493 if (nlportid == wdev->ap_unexpected_nlportid)
494 wdev->ap_unexpected_nlportid = 0;
497 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
499 struct cfg80211_mgmt_registration *reg, *tmp;
501 spin_lock_bh(&wdev->mgmt_registrations_lock);
503 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
504 list_del(®->list);
508 spin_unlock_bh(&wdev->mgmt_registrations_lock);
511 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
512 struct wireless_dev *wdev,
513 struct cfg80211_mgmt_tx_params *params, u64 *cookie)
515 const struct ieee80211_mgmt *mgmt;
518 if (!wdev->wiphy->mgmt_stypes)
521 if (!rdev->ops->mgmt_tx)
524 if (params->len < 24 + 1)
527 mgmt = (const struct ieee80211_mgmt *)params->buf;
529 if (!ieee80211_is_mgmt(mgmt->frame_control))
532 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
533 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
536 if (ieee80211_is_action(mgmt->frame_control) &&
537 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
542 switch (wdev->iftype) {
543 case NL80211_IFTYPE_ADHOC:
544 case NL80211_IFTYPE_STATION:
545 case NL80211_IFTYPE_P2P_CLIENT:
546 if (!wdev->current_bss) {
551 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
558 * check for IBSS DA must be done by driver as
559 * cfg80211 doesn't track the stations
561 if (wdev->iftype == NL80211_IFTYPE_ADHOC)
564 /* for station, check that DA is the AP */
565 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
571 case NL80211_IFTYPE_AP:
572 case NL80211_IFTYPE_P2P_GO:
573 case NL80211_IFTYPE_AP_VLAN:
574 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
577 case NL80211_IFTYPE_MESH_POINT:
578 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
583 * check for mesh DA must be done by driver as
584 * cfg80211 doesn't track the stations
587 case NL80211_IFTYPE_P2P_DEVICE:
589 * fall through, P2P device only supports
590 * public action frames
602 if (!ether_addr_equal(mgmt->sa, wdev_address(wdev)))
605 /* Transmit the Action frame as requested by user space */
606 return rdev_mgmt_tx(rdev, wdev, params, cookie);
609 bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
610 const u8 *buf, size_t len, u32 flags)
612 struct wiphy *wiphy = wdev->wiphy;
613 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
614 struct cfg80211_mgmt_registration *reg;
615 const struct ieee80211_txrx_stypes *stypes =
616 &wiphy->mgmt_stypes[wdev->iftype];
617 struct ieee80211_mgmt *mgmt = (void *)buf;
621 __le16 ftype = mgmt->frame_control &
622 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
625 trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm);
626 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
628 if (!(stypes->rx & BIT(stype))) {
629 trace_cfg80211_return_bool(false);
633 data = buf + ieee80211_hdrlen(mgmt->frame_control);
634 data_len = len - ieee80211_hdrlen(mgmt->frame_control);
636 spin_lock_bh(&wdev->mgmt_registrations_lock);
638 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
639 if (reg->frame_type != ftype)
642 if (reg->match_len > data_len)
645 if (memcmp(reg->match, data, reg->match_len))
650 /* Indicate the received Action frame to user space */
651 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
653 buf, len, flags, GFP_ATOMIC))
660 spin_unlock_bh(&wdev->mgmt_registrations_lock);
662 trace_cfg80211_return_bool(result);
665 EXPORT_SYMBOL(cfg80211_rx_mgmt);
667 void cfg80211_dfs_channels_update_work(struct work_struct *work)
669 struct delayed_work *delayed_work;
670 struct cfg80211_registered_device *rdev;
671 struct cfg80211_chan_def chandef;
672 struct ieee80211_supported_band *sband;
673 struct ieee80211_channel *c;
675 bool check_again = false;
676 unsigned long timeout, next_time = 0;
679 delayed_work = container_of(work, struct delayed_work, work);
680 rdev = container_of(delayed_work, struct cfg80211_registered_device,
681 dfs_update_channels_wk);
682 wiphy = &rdev->wiphy;
685 for (bandid = 0; bandid < IEEE80211_NUM_BANDS; bandid++) {
686 sband = wiphy->bands[bandid];
690 for (i = 0; i < sband->n_channels; i++) {
691 c = &sband->channels[i];
693 if (c->dfs_state != NL80211_DFS_UNAVAILABLE)
696 timeout = c->dfs_state_entered + msecs_to_jiffies(
697 IEEE80211_DFS_MIN_NOP_TIME_MS);
699 if (time_after_eq(jiffies, timeout)) {
700 c->dfs_state = NL80211_DFS_USABLE;
701 c->dfs_state_entered = jiffies;
703 cfg80211_chandef_create(&chandef, c,
706 nl80211_radar_notify(rdev, &chandef,
707 NL80211_RADAR_NOP_FINISHED,
713 next_time = timeout - jiffies;
715 next_time = min(next_time, timeout - jiffies);
721 /* reschedule if there are other channels waiting to be cleared again */
723 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
728 void cfg80211_radar_event(struct wiphy *wiphy,
729 struct cfg80211_chan_def *chandef,
732 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
733 unsigned long timeout;
735 trace_cfg80211_radar_event(wiphy, chandef);
737 /* only set the chandef supplied channel to unavailable, in
738 * case the radar is detected on only one of multiple channels
739 * spanned by the chandef.
741 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
743 timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS);
744 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
747 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
749 EXPORT_SYMBOL(cfg80211_radar_event);
751 void cfg80211_cac_event(struct net_device *netdev,
752 const struct cfg80211_chan_def *chandef,
753 enum nl80211_radar_event event, gfp_t gfp)
755 struct wireless_dev *wdev = netdev->ieee80211_ptr;
756 struct wiphy *wiphy = wdev->wiphy;
757 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
758 unsigned long timeout;
760 trace_cfg80211_cac_event(netdev, event);
762 if (WARN_ON(!wdev->cac_started))
765 if (WARN_ON(!wdev->chandef.chan))
769 case NL80211_RADAR_CAC_FINISHED:
770 timeout = wdev->cac_start_time +
771 msecs_to_jiffies(wdev->cac_time_ms);
772 WARN_ON(!time_after_eq(jiffies, timeout));
773 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
775 case NL80211_RADAR_CAC_ABORTED:
781 wdev->cac_started = false;
783 nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
785 EXPORT_SYMBOL(cfg80211_cac_event);