2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/cfg80211.h>
26 #include "ieee80211_common.h"
27 #include "ieee80211_i.h"
28 #include "ieee80211_rate.h"
32 #include "ieee80211_led.h"
33 #include "ieee80211_cfg.h"
35 #include "debugfs_netdev.h"
38 * For seeing transmitted packets on monitor interfaces
39 * we have a radiotap header too.
41 struct ieee80211_tx_status_rtap_hdr {
42 struct ieee80211_radiotap_header hdr;
45 } __attribute__ ((packed));
47 /* common interface routines */
49 static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
51 struct ieee80211_sub_if_data *sdata;
52 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
53 return &(sdata->stats);
56 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
58 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
62 /* master interface */
64 static int ieee80211_master_open(struct net_device *dev)
66 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
67 struct ieee80211_sub_if_data *sdata;
68 int res = -EOPNOTSUPP;
70 read_lock(&local->sub_if_lock);
71 list_for_each_entry(sdata, &local->sub_if_list, list) {
72 if (sdata->dev != dev && netif_running(sdata->dev)) {
77 read_unlock(&local->sub_if_lock);
81 static int ieee80211_master_stop(struct net_device *dev)
83 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
84 struct ieee80211_sub_if_data *sdata;
86 read_lock(&local->sub_if_lock);
87 list_for_each_entry(sdata, &local->sub_if_list, list)
88 if (sdata->dev != dev && netif_running(sdata->dev))
89 dev_close(sdata->dev);
90 read_unlock(&local->sub_if_lock);
95 /* management interface */
98 ieee80211_fill_frame_info(struct ieee80211_local *local,
99 struct ieee80211_frame_info *fi,
100 struct ieee80211_rx_status *status)
104 struct ieee80211_rate *rate;
106 jiffies_to_timespec(jiffies, &ts);
107 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
109 fi->mactime = cpu_to_be64(status->mactime);
110 switch (status->phymode) {
111 case MODE_IEEE80211A:
112 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
114 case MODE_IEEE80211B:
115 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
117 case MODE_IEEE80211G:
118 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
120 case MODE_ATHEROS_TURBO:
122 htonl(ieee80211_phytype_dsss_dot11_turbo);
125 fi->phytype = htonl(0xAAAAAAAA);
128 fi->channel = htonl(status->channel);
129 rate = ieee80211_get_rate(local, status->phymode,
132 fi->datarate = htonl(rate->rate);
133 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
134 if (status->rate == rate->val)
135 fi->preamble = htonl(2); /* long */
136 else if (status->rate == rate->val2)
137 fi->preamble = htonl(1); /* short */
139 fi->preamble = htonl(0);
141 fi->datarate = htonl(0);
142 fi->preamble = htonl(0);
145 fi->antenna = htonl(status->antenna);
146 fi->priority = htonl(0xffffffff); /* no clue */
147 fi->ssi_type = htonl(ieee80211_ssi_raw);
148 fi->ssi_signal = htonl(status->ssi);
149 fi->ssi_noise = 0x00000000;
152 /* clear everything because we really don't know.
153 * the msg_type field isn't present on monitor frames
154 * so we don't know whether it will be present or not,
155 * but it's ok to not clear it since it'll be assigned
157 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
159 fi->ssi_type = htonl(ieee80211_ssi_none);
161 fi->version = htonl(IEEE80211_FI_VERSION);
162 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
165 /* this routine is actually not just for this, but also
166 * for pushing fake 'management' frames into userspace.
167 * it shall be replaced by a netlink-based system. */
169 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
170 struct ieee80211_rx_status *status, u32 msg_type)
172 struct ieee80211_frame_info *fi;
173 const size_t hlen = sizeof(struct ieee80211_frame_info);
174 struct ieee80211_sub_if_data *sdata;
176 skb->dev = local->apdev;
178 sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
180 if (skb_headroom(skb) < hlen) {
181 I802_DEBUG_INC(local->rx_expand_skb_head);
182 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
188 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
190 ieee80211_fill_frame_info(local, fi, status);
191 fi->msg_type = htonl(msg_type);
193 sdata->stats.rx_packets++;
194 sdata->stats.rx_bytes += skb->len;
196 skb_set_mac_header(skb, 0);
197 skb->ip_summed = CHECKSUM_UNNECESSARY;
198 skb->pkt_type = PACKET_OTHERHOST;
199 skb->protocol = htons(ETH_P_802_2);
200 memset(skb->cb, 0, sizeof(skb->cb));
204 int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
205 int radar, int radar_type)
208 struct ieee80211_radar_info *msg;
209 struct ieee80211_local *local = hw_to_local(hw);
214 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
215 sizeof(struct ieee80211_radar_info));
219 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
221 msg = (struct ieee80211_radar_info *)
222 skb_put(skb, sizeof(struct ieee80211_radar_info));
223 msg->channel = channel;
225 msg->radar_type = radar_type;
227 ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
230 EXPORT_SYMBOL(ieee80211_radar_status);
232 void ieee80211_key_threshold_notify(struct net_device *dev,
233 struct ieee80211_key *key,
234 struct sta_info *sta)
236 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
238 struct ieee80211_msg_key_notification *msg;
240 /* if no one will get it anyway, don't even allocate it.
241 * unlikely because this is only relevant for APs
242 * where the device must be open... */
243 if (unlikely(!local->apdev))
246 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
247 sizeof(struct ieee80211_msg_key_notification));
251 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
252 msg = (struct ieee80211_msg_key_notification *)
253 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
254 msg->tx_rx_count = key->tx_rx_count;
255 memcpy(msg->ifname, dev->name, IFNAMSIZ);
257 memcpy(msg->addr, sta->addr, ETH_ALEN);
259 memset(msg->addr, 0xff, ETH_ALEN);
261 key->tx_rx_count = 0;
263 ieee80211_rx_mgmt(local, skb, NULL,
264 ieee80211_msg_key_threshold_notification);
267 static int ieee80211_mgmt_open(struct net_device *dev)
269 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
271 if (!netif_running(local->mdev))
276 static int ieee80211_mgmt_stop(struct net_device *dev)
281 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
283 /* FIX: what would be proper limits for MTU?
284 * This interface uses 802.11 frames. */
285 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
286 printk(KERN_WARNING "%s: invalid MTU %d\n",
291 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
292 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
293 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
298 void ieee80211_if_mgmt_setup(struct net_device *dev)
301 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
302 dev->change_mtu = ieee80211_change_mtu_apdev;
303 dev->get_stats = ieee80211_get_stats;
304 dev->open = ieee80211_mgmt_open;
305 dev->stop = ieee80211_mgmt_stop;
306 dev->type = ARPHRD_IEEE80211_PRISM;
307 dev->hard_header_parse = header_parse_80211;
308 dev->uninit = ieee80211_if_reinit;
309 dev->destructor = ieee80211_if_free;
312 /* regular interfaces */
314 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
316 /* FIX: what would be proper limits for MTU?
317 * This interface uses 802.3 frames. */
318 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
319 printk(KERN_WARNING "%s: invalid MTU %d\n",
324 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
325 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
326 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
331 static inline int identical_mac_addr_allowed(int type1, int type2)
333 return (type1 == IEEE80211_IF_TYPE_MNTR ||
334 type2 == IEEE80211_IF_TYPE_MNTR ||
335 (type1 == IEEE80211_IF_TYPE_AP &&
336 type2 == IEEE80211_IF_TYPE_WDS) ||
337 (type1 == IEEE80211_IF_TYPE_WDS &&
338 (type2 == IEEE80211_IF_TYPE_WDS ||
339 type2 == IEEE80211_IF_TYPE_AP)) ||
340 (type1 == IEEE80211_IF_TYPE_AP &&
341 type2 == IEEE80211_IF_TYPE_VLAN) ||
342 (type1 == IEEE80211_IF_TYPE_VLAN &&
343 (type2 == IEEE80211_IF_TYPE_AP ||
344 type2 == IEEE80211_IF_TYPE_VLAN)));
347 /* Check if running monitor interfaces should go to a "soft monitor" mode
348 * and switch them if necessary. */
349 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
351 struct ieee80211_if_init_conf conf;
353 if (local->open_count && local->open_count == local->monitors &&
354 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
355 local->ops->remove_interface) {
357 conf.type = IEEE80211_IF_TYPE_MNTR;
358 conf.mac_addr = NULL;
359 local->ops->remove_interface(local_to_hw(local), &conf);
363 /* Check if running monitor interfaces should go to a "hard monitor" mode
364 * and switch them if necessary. */
365 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
367 struct ieee80211_if_init_conf conf;
369 if (local->open_count && local->open_count == local->monitors &&
370 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
372 conf.type = IEEE80211_IF_TYPE_MNTR;
373 conf.mac_addr = NULL;
374 local->ops->add_interface(local_to_hw(local), &conf);
378 static void ieee80211_if_open(struct net_device *dev)
380 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
382 switch (sdata->type) {
383 case IEEE80211_IF_TYPE_STA:
384 case IEEE80211_IF_TYPE_IBSS:
385 sdata->u.sta.prev_bssid_set = 0;
390 static int ieee80211_open(struct net_device *dev)
392 struct ieee80211_sub_if_data *sdata, *nsdata;
393 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
394 struct ieee80211_if_init_conf conf;
397 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
398 read_lock(&local->sub_if_lock);
399 list_for_each_entry(nsdata, &local->sub_if_list, list) {
400 struct net_device *ndev = nsdata->dev;
402 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
403 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
404 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
405 read_unlock(&local->sub_if_lock);
409 read_unlock(&local->sub_if_lock);
411 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
412 is_zero_ether_addr(sdata->u.wds.remote_addr))
415 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
416 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
417 /* run the interface in a "soft monitor" mode */
420 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
423 ieee80211_if_open(dev);
424 ieee80211_start_soft_monitor(local);
426 conf.if_id = dev->ifindex;
427 conf.type = sdata->type;
428 conf.mac_addr = dev->dev_addr;
429 res = local->ops->add_interface(local_to_hw(local), &conf);
431 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
432 ieee80211_start_hard_monitor(local);
436 if (local->open_count == 0) {
438 tasklet_enable(&local->tx_pending_tasklet);
439 tasklet_enable(&local->tasklet);
440 if (local->ops->open)
441 res = local->ops->open(local_to_hw(local));
443 res = dev_open(local->mdev);
445 if (local->ops->stop)
446 local->ops->stop(local_to_hw(local));
448 res = ieee80211_hw_config(local);
449 if (res && local->ops->stop)
450 local->ops->stop(local_to_hw(local));
451 else if (!res && local->apdev)
452 dev_open(local->apdev);
456 if (local->ops->remove_interface)
457 local->ops->remove_interface(local_to_hw(local),
464 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
466 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
468 ieee80211_if_config(dev);
470 if (sdata->type == IEEE80211_IF_TYPE_STA &&
471 !local->user_space_mlme)
472 netif_carrier_off(dev);
474 netif_carrier_on(dev);
476 netif_start_queue(dev);
480 static void ieee80211_if_shutdown(struct net_device *dev)
482 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
483 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
486 switch (sdata->type) {
487 case IEEE80211_IF_TYPE_STA:
488 case IEEE80211_IF_TYPE_IBSS:
489 sdata->u.sta.state = IEEE80211_DISABLED;
490 del_timer_sync(&sdata->u.sta.timer);
491 skb_queue_purge(&sdata->u.sta.skb_queue);
492 if (!local->ops->hw_scan &&
493 local->scan_dev == sdata->dev) {
494 local->sta_scanning = 0;
495 cancel_delayed_work(&local->scan_work);
497 flush_workqueue(local->hw.workqueue);
502 static int ieee80211_stop(struct net_device *dev)
504 struct ieee80211_sub_if_data *sdata;
505 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
507 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
509 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
510 local->open_count > 1 &&
511 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
512 /* remove "soft monitor" interface */
515 if (!local->monitors)
516 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
520 netif_stop_queue(dev);
521 ieee80211_if_shutdown(dev);
523 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
525 if (!local->monitors)
526 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
530 if (local->open_count == 0) {
531 if (netif_running(local->mdev))
532 dev_close(local->mdev);
534 dev_close(local->apdev);
535 if (local->ops->stop)
536 local->ops->stop(local_to_hw(local));
537 tasklet_disable(&local->tx_pending_tasklet);
538 tasklet_disable(&local->tasklet);
540 if (local->ops->remove_interface) {
541 struct ieee80211_if_init_conf conf;
543 conf.if_id = dev->ifindex;
544 conf.type = sdata->type;
545 conf.mac_addr = dev->dev_addr;
546 local->ops->remove_interface(local_to_hw(local), &conf);
549 ieee80211_start_hard_monitor(local);
554 enum netif_tx_lock_class {
559 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
561 spin_lock_nested(&dev->_xmit_lock, subclass);
562 dev->xmit_lock_owner = smp_processor_id();
565 static void ieee80211_set_multicast_list(struct net_device *dev)
567 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
568 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
569 unsigned short flags;
571 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
572 if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
573 if (sdata->allmulti) {
575 local->iff_allmultis--;
578 local->iff_allmultis++;
581 if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
582 if (sdata->promisc) {
584 local->iff_promiscs--;
587 local->iff_promiscs++;
590 if (dev->mc_count != sdata->mc_count) {
591 local->mc_count = local->mc_count - sdata->mc_count +
593 sdata->mc_count = dev->mc_count;
595 if (local->ops->set_multicast_list) {
596 flags = local->mdev->flags;
597 if (local->iff_allmultis)
598 flags |= IFF_ALLMULTI;
599 if (local->iff_promiscs)
600 flags |= IFF_PROMISC;
601 read_lock(&local->sub_if_lock);
602 local->ops->set_multicast_list(local_to_hw(local), flags,
604 read_unlock(&local->sub_if_lock);
606 netif_tx_unlock(local->mdev);
609 /* Must not be called for mdev and apdev */
610 void ieee80211_if_setup(struct net_device *dev)
613 dev->hard_start_xmit = ieee80211_subif_start_xmit;
614 dev->wireless_handlers = &ieee80211_iw_handler_def;
615 dev->set_multicast_list = ieee80211_set_multicast_list;
616 dev->change_mtu = ieee80211_change_mtu;
617 dev->get_stats = ieee80211_get_stats;
618 dev->open = ieee80211_open;
619 dev->stop = ieee80211_stop;
620 dev->uninit = ieee80211_if_reinit;
621 dev->destructor = ieee80211_if_free;
624 /* WDS specialties */
626 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
628 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
629 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
630 struct sta_info *sta;
632 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
635 /* Create STA entry for the new peer */
636 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
641 /* Remove STA entry for the old peer */
642 sta = sta_info_get(local, sdata->u.wds.remote_addr);
647 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
648 "peer " MAC_FMT "\n",
649 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
652 /* Update WDS link data */
653 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
658 /* everything else */
660 static int __ieee80211_if_config(struct net_device *dev,
661 struct sk_buff *beacon,
662 struct ieee80211_tx_control *control)
664 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
665 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
666 struct ieee80211_if_conf conf;
667 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
669 if (!local->ops->config_interface || !netif_running(dev))
672 memset(&conf, 0, sizeof(conf));
673 conf.type = sdata->type;
674 if (sdata->type == IEEE80211_IF_TYPE_STA ||
675 sdata->type == IEEE80211_IF_TYPE_IBSS) {
676 if (local->sta_scanning &&
677 local->scan_dev == dev)
678 conf.bssid = scan_bssid;
680 conf.bssid = sdata->u.sta.bssid;
681 conf.ssid = sdata->u.sta.ssid;
682 conf.ssid_len = sdata->u.sta.ssid_len;
683 conf.generic_elem = sdata->u.sta.extra_ie;
684 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
685 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
686 conf.ssid = sdata->u.ap.ssid;
687 conf.ssid_len = sdata->u.ap.ssid_len;
688 conf.generic_elem = sdata->u.ap.generic_elem;
689 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
690 conf.beacon = beacon;
691 conf.beacon_control = control;
693 return local->ops->config_interface(local_to_hw(local),
694 dev->ifindex, &conf);
697 int ieee80211_if_config(struct net_device *dev)
699 return __ieee80211_if_config(dev, NULL, NULL);
702 int ieee80211_if_config_beacon(struct net_device *dev)
704 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
705 struct ieee80211_tx_control control;
708 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
710 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
713 return __ieee80211_if_config(dev, skb, &control);
716 int ieee80211_hw_config(struct ieee80211_local *local)
718 struct ieee80211_hw_mode *mode;
719 struct ieee80211_channel *chan;
722 if (local->sta_scanning) {
723 chan = local->scan_channel;
724 mode = local->scan_hw_mode;
726 chan = local->oper_channel;
727 mode = local->oper_hw_mode;
730 local->hw.conf.channel = chan->chan;
731 local->hw.conf.channel_val = chan->val;
732 local->hw.conf.power_level = chan->power_level;
733 local->hw.conf.freq = chan->freq;
734 local->hw.conf.phymode = mode->mode;
735 local->hw.conf.antenna_max = chan->antenna_max;
736 local->hw.conf.chan = chan;
737 local->hw.conf.mode = mode;
739 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
740 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
741 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
742 local->hw.conf.phymode);
743 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
745 if (local->ops->config)
746 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
751 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
752 struct dev_mc_list *prev,
755 struct ieee80211_local *local = hw_to_local(hw);
756 struct ieee80211_sub_if_data *sdata = *ptr;
757 struct dev_mc_list *mc;
763 if (!prev || !prev->next) {
765 sdata = list_entry(sdata->list.next,
766 struct ieee80211_sub_if_data, list);
768 sdata = list_entry(local->sub_if_list.next,
769 struct ieee80211_sub_if_data, list);
770 if (&sdata->list != &local->sub_if_list)
771 mc = sdata->dev->mc_list;
780 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
782 static void ieee80211_stat_refresh(unsigned long data)
784 struct ieee80211_local *local = (struct ieee80211_local *) data;
785 struct sta_info *sta;
786 struct ieee80211_sub_if_data *sdata;
788 if (!local->stat_time)
791 /* go through all stations */
792 read_lock_bh(&local->sta_lock);
793 list_for_each_entry(sta, &local->sta_list, list) {
794 sta->channel_use = (sta->channel_use_raw / local->stat_time) /
796 sta->channel_use_raw = 0;
798 read_unlock_bh(&local->sta_lock);
800 /* go through all subinterfaces */
801 read_lock(&local->sub_if_lock);
802 list_for_each_entry(sdata, &local->sub_if_list, list) {
803 sdata->channel_use = (sdata->channel_use_raw /
804 local->stat_time) / CHAN_UTIL_PER_10MS;
805 sdata->channel_use_raw = 0;
807 read_unlock(&local->sub_if_lock);
809 /* hardware interface */
810 local->channel_use = (local->channel_use_raw /
811 local->stat_time) / CHAN_UTIL_PER_10MS;
812 local->channel_use_raw = 0;
814 local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
815 add_timer(&local->stat_timer);
818 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
820 struct ieee80211_tx_status *status)
822 struct ieee80211_local *local = hw_to_local(hw);
823 struct ieee80211_tx_status *saved;
826 skb->dev = local->mdev;
827 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
828 if (unlikely(!saved)) {
830 printk(KERN_WARNING "%s: Not enough memory, "
831 "dropping tx status", skb->dev->name);
832 /* should be dev_kfree_skb_irq, but due to this function being
833 * named _irqsafe instead of just _irq we can't be sure that
834 * people won't call it from non-irq contexts */
835 dev_kfree_skb_any(skb);
838 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
839 /* copy pointer to saved status into skb->cb for use by tasklet */
840 memcpy(skb->cb, &saved, sizeof(saved));
842 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
843 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
844 &local->skb_queue : &local->skb_queue_unreliable, skb);
845 tmp = skb_queue_len(&local->skb_queue) +
846 skb_queue_len(&local->skb_queue_unreliable);
847 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
848 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
849 memcpy(&saved, skb->cb, sizeof(saved));
851 dev_kfree_skb_irq(skb);
853 I802_DEBUG_INC(local->tx_status_drop);
855 tasklet_schedule(&local->tasklet);
857 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
859 static void ieee80211_tasklet_handler(unsigned long data)
861 struct ieee80211_local *local = (struct ieee80211_local *) data;
863 struct ieee80211_rx_status rx_status;
864 struct ieee80211_tx_status *tx_status;
866 while ((skb = skb_dequeue(&local->skb_queue)) ||
867 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
868 switch (skb->pkt_type) {
869 case IEEE80211_RX_MSG:
870 /* status is in skb->cb */
871 memcpy(&rx_status, skb->cb, sizeof(rx_status));
872 /* Clear skb->type in order to not confuse kernel
875 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
877 case IEEE80211_TX_STATUS_MSG:
878 /* get pointer to saved status out of skb->cb */
879 memcpy(&tx_status, skb->cb, sizeof(tx_status));
881 ieee80211_tx_status(local_to_hw(local),
885 default: /* should never get here! */
886 printk(KERN_ERR "%s: Unknown message type (%d)\n",
887 local->mdev->name, skb->pkt_type);
894 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
895 * make a prepared TX frame (one that has been given to hw) to look like brand
896 * new IEEE 802.11 frame that is ready to go through TX processing again.
897 * Also, tx_packet_data in cb is restored from tx_control. */
898 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
899 struct ieee80211_key *key,
901 struct ieee80211_tx_control *control)
903 int hdrlen, iv_len, mic_len;
904 struct ieee80211_tx_packet_data *pkt_data;
906 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
907 pkt_data->ifindex = control->ifindex;
908 pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
909 pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
910 pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
911 pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
912 pkt_data->queue = control->queue;
914 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
922 mic_len = WEP_ICV_LEN;
925 iv_len = TKIP_IV_LEN;
926 mic_len = TKIP_ICV_LEN;
929 iv_len = CCMP_HDR_LEN;
930 mic_len = CCMP_MIC_LEN;
936 if (skb->len >= mic_len && key->force_sw_encrypt)
937 skb_trim(skb, skb->len - mic_len);
938 if (skb->len >= iv_len && skb->len > hdrlen) {
939 memmove(skb->data + iv_len, skb->data, hdrlen);
940 skb_pull(skb, iv_len);
945 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
946 u16 fc = le16_to_cpu(hdr->frame_control);
947 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
948 fc &= ~IEEE80211_STYPE_QOS_DATA;
949 hdr->frame_control = cpu_to_le16(fc);
950 memmove(skb->data + 2, skb->data, hdrlen - 2);
956 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
957 struct ieee80211_tx_status *status)
959 struct sk_buff *skb2;
960 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
961 struct ieee80211_local *local = hw_to_local(hw);
964 struct ieee80211_tx_status_rtap_hdr *rthdr;
965 struct ieee80211_sub_if_data *sdata;
970 "%s: ieee80211_tx_status called with NULL status\n",
976 if (status->excessive_retries) {
977 struct sta_info *sta;
978 sta = sta_info_get(local, hdr->addr1);
980 if (sta->flags & WLAN_STA_PS) {
981 /* The STA is in power save mode, so assume
982 * that this TX packet failed because of that.
984 status->excessive_retries = 0;
985 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
991 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
992 struct sta_info *sta;
993 sta = sta_info_get(local, hdr->addr1);
995 sta->tx_filtered_count++;
997 /* Clear the TX filter mask for this STA when sending
998 * the next packet. If the STA went to power save mode,
999 * this will happen when it is waking up for the next
1001 sta->clear_dst_mask = 1;
1003 /* TODO: Is the WLAN_STA_PS flag always set here or is
1004 * the race between RX and TX status causing some
1005 * packets to be filtered out before 80211.o gets an
1006 * update for PS status? This seems to be the case, so
1007 * no changes are likely to be needed. */
1008 if (sta->flags & WLAN_STA_PS &&
1009 skb_queue_len(&sta->tx_filtered) <
1010 STA_MAX_TX_BUFFER) {
1011 ieee80211_remove_tx_extra(local, sta->key,
1014 skb_queue_tail(&sta->tx_filtered, skb);
1015 } else if (!(sta->flags & WLAN_STA_PS) &&
1016 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1017 /* Software retry the packet once */
1018 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1019 ieee80211_remove_tx_extra(local, sta->key,
1022 dev_queue_xmit(skb);
1024 if (net_ratelimit()) {
1025 printk(KERN_DEBUG "%s: dropped TX "
1026 "filtered frame queue_len=%d "
1031 !!(sta->flags & WLAN_STA_PS),
1040 /* FIXME: STUPID to call this with both local and local->mdev */
1041 rate_control_tx_status(local, local->mdev, skb, status);
1044 ieee80211_led_tx(local, 0);
1047 * Fragments are passed to low-level drivers as separate skbs, so these
1048 * are actually fragments, not frames. Update frame counters only for
1049 * the first fragment of the frame. */
1051 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1052 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1054 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1056 local->dot11TransmittedFrameCount++;
1057 if (is_multicast_ether_addr(hdr->addr1))
1058 local->dot11MulticastTransmittedFrameCount++;
1059 if (status->retry_count > 0)
1060 local->dot11RetryCount++;
1061 if (status->retry_count > 1)
1062 local->dot11MultipleRetryCount++;
1065 /* This counter shall be incremented for an acknowledged MPDU
1066 * with an individual address in the address 1 field or an MPDU
1067 * with a multicast address in the address 1 field of type Data
1069 if (!is_multicast_ether_addr(hdr->addr1) ||
1070 type == IEEE80211_FTYPE_DATA ||
1071 type == IEEE80211_FTYPE_MGMT)
1072 local->dot11TransmittedFragmentCount++;
1075 local->dot11FailedCount++;
1078 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1079 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1081 /* this was a transmitted frame, but now we want to reuse it */
1084 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1086 if (local->monitors) {
1087 skb2 = skb_clone(skb, GFP_ATOMIC);
1094 /* Send frame to hostapd */
1095 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1101 if (!local->monitors) {
1106 /* send frame to monitor interfaces now */
1108 if (skb_headroom(skb) < sizeof(*rthdr)) {
1109 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1114 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1115 skb_push(skb, sizeof(*rthdr));
1117 memset(rthdr, 0, sizeof(*rthdr));
1118 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1119 rthdr->hdr.it_present =
1120 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1121 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1123 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1124 !is_multicast_ether_addr(hdr->addr1))
1125 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1127 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1128 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1129 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1130 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1131 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1133 rthdr->data_retries = status->retry_count;
1135 read_lock(&local->sub_if_lock);
1136 monitors = local->monitors;
1137 list_for_each_entry(sdata, &local->sub_if_list, list) {
1139 * Using the monitors counter is possibly racy, but
1140 * if the value is wrong we simply either clone the skb
1141 * once too much or forget sending it to one monitor iface
1142 * The latter case isn't nice but fixing the race is much
1145 if (!monitors || !skb)
1148 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1149 if (!netif_running(sdata->dev))
1153 skb2 = skb_clone(skb, GFP_KERNEL);
1156 skb->dev = sdata->dev;
1157 /* XXX: is this sufficient for BPF? */
1158 skb_set_mac_header(skb, 0);
1159 skb->ip_summed = CHECKSUM_UNNECESSARY;
1160 skb->pkt_type = PACKET_OTHERHOST;
1161 skb->protocol = htons(ETH_P_802_2);
1162 memset(skb->cb, 0, sizeof(skb->cb));
1168 read_unlock(&local->sub_if_lock);
1172 EXPORT_SYMBOL(ieee80211_tx_status);
1174 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1175 const struct ieee80211_ops *ops)
1177 struct net_device *mdev;
1178 struct ieee80211_local *local;
1179 struct ieee80211_sub_if_data *sdata;
1181 struct wiphy *wiphy;
1183 /* Ensure 32-byte alignment of our private data and hw private data.
1184 * We use the wiphy priv data for both our ieee80211_local and for
1185 * the driver's private data
1187 * In memory it'll be like this:
1189 * +-------------------------+
1191 * +-------------------------+
1192 * | struct ieee80211_local |
1193 * +-------------------------+
1194 * | driver's private data |
1195 * +-------------------------+
1198 priv_size = ((sizeof(struct ieee80211_local) +
1199 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1202 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1207 wiphy->privid = mac80211_wiphy_privid;
1209 local = wiphy_priv(wiphy);
1210 local->hw.wiphy = wiphy;
1212 local->hw.priv = (char *)local +
1213 ((sizeof(struct ieee80211_local) +
1214 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1217 BUG_ON(!ops->config);
1218 BUG_ON(!ops->add_interface);
1221 /* for now, mdev needs sub_if_data :/ */
1222 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1223 "wmaster%d", ether_setup);
1229 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1230 mdev->ieee80211_ptr = &sdata->wdev;
1231 sdata->wdev.wiphy = wiphy;
1233 local->hw.queues = 1; /* default */
1236 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1237 local->rx_handlers = ieee80211_rx_handlers;
1238 local->tx_handlers = ieee80211_tx_handlers;
1240 local->bridge_packets = 1;
1242 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1243 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1244 local->short_retry_limit = 7;
1245 local->long_retry_limit = 4;
1246 local->hw.conf.radio_enabled = 1;
1248 local->enabled_modes = (unsigned int) -1;
1250 INIT_LIST_HEAD(&local->modes_list);
1252 rwlock_init(&local->sub_if_lock);
1253 INIT_LIST_HEAD(&local->sub_if_list);
1255 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1256 init_timer(&local->stat_timer);
1257 local->stat_timer.function = ieee80211_stat_refresh;
1258 local->stat_timer.data = (unsigned long) local;
1259 ieee80211_rx_bss_list_init(mdev);
1261 sta_info_init(local);
1263 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1264 mdev->open = ieee80211_master_open;
1265 mdev->stop = ieee80211_master_stop;
1266 mdev->type = ARPHRD_IEEE80211;
1267 mdev->hard_header_parse = header_parse_80211;
1269 sdata->type = IEEE80211_IF_TYPE_AP;
1271 sdata->local = local;
1272 sdata->u.ap.force_unicast_rateidx = -1;
1273 sdata->u.ap.max_ratectrl_rateidx = -1;
1274 ieee80211_if_sdata_init(sdata);
1275 list_add_tail(&sdata->list, &local->sub_if_list);
1277 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1278 (unsigned long)local);
1279 tasklet_disable(&local->tx_pending_tasklet);
1281 tasklet_init(&local->tasklet,
1282 ieee80211_tasklet_handler,
1283 (unsigned long) local);
1284 tasklet_disable(&local->tasklet);
1286 skb_queue_head_init(&local->skb_queue);
1287 skb_queue_head_init(&local->skb_queue_unreliable);
1289 return local_to_hw(local);
1291 EXPORT_SYMBOL(ieee80211_alloc_hw);
1293 int ieee80211_register_hw(struct ieee80211_hw *hw)
1295 struct ieee80211_local *local = hw_to_local(hw);
1299 result = wiphy_register(local->hw.wiphy);
1303 name = wiphy_dev(local->hw.wiphy)->driver->name;
1304 local->hw.workqueue = create_singlethread_workqueue(name);
1305 if (!local->hw.workqueue) {
1307 goto fail_workqueue;
1311 * The hardware needs headroom for sending the frame,
1312 * and we need some headroom for passing the frame to monitor
1313 * interfaces, but never both at the same time.
1315 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1316 sizeof(struct ieee80211_tx_status_rtap_hdr));
1318 debugfs_hw_add(local);
1320 local->hw.conf.beacon_int = 1000;
1322 local->wstats_flags |= local->hw.max_rssi ?
1323 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1324 local->wstats_flags |= local->hw.max_signal ?
1325 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1326 local->wstats_flags |= local->hw.max_noise ?
1327 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1328 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1329 local->wstats_flags |= IW_QUAL_DBM;
1331 result = sta_info_start(local);
1336 result = dev_alloc_name(local->mdev, local->mdev->name);
1340 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1341 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1343 result = register_netdevice(local->mdev);
1347 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1349 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1351 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1352 "algorithm\n", local->mdev->name);
1356 result = ieee80211_wep_init(local);
1359 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1364 ieee80211_install_qdisc(local->mdev);
1366 /* add one default STA interface */
1367 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1368 IEEE80211_IF_TYPE_STA);
1370 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1373 local->reg_state = IEEE80211_DEV_REGISTERED;
1376 ieee80211_led_init(local);
1381 rate_control_deinitialize(local);
1383 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1384 unregister_netdevice(local->mdev);
1387 sta_info_stop(local);
1389 debugfs_hw_del(local);
1390 destroy_workqueue(local->hw.workqueue);
1392 wiphy_unregister(local->hw.wiphy);
1395 EXPORT_SYMBOL(ieee80211_register_hw);
1397 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1398 struct ieee80211_hw_mode *mode)
1400 struct ieee80211_local *local = hw_to_local(hw);
1401 struct ieee80211_rate *rate;
1404 INIT_LIST_HEAD(&mode->list);
1405 list_add_tail(&mode->list, &local->modes_list);
1407 local->hw_modes |= (1 << mode->mode);
1408 for (i = 0; i < mode->num_rates; i++) {
1409 rate = &(mode->rates[i]);
1410 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1412 ieee80211_prepare_rates(local, mode);
1414 if (!local->oper_hw_mode) {
1415 /* Default to this mode */
1416 local->hw.conf.phymode = mode->mode;
1417 local->oper_hw_mode = local->scan_hw_mode = mode;
1418 local->oper_channel = local->scan_channel = &mode->channels[0];
1419 local->hw.conf.mode = local->oper_hw_mode;
1420 local->hw.conf.chan = local->oper_channel;
1423 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1424 ieee80211_set_default_regdomain(mode);
1428 EXPORT_SYMBOL(ieee80211_register_hwmode);
1430 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1432 struct ieee80211_local *local = hw_to_local(hw);
1433 struct ieee80211_sub_if_data *sdata, *tmp;
1434 struct list_head tmp_list;
1437 tasklet_kill(&local->tx_pending_tasklet);
1438 tasklet_kill(&local->tasklet);
1442 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1444 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1446 ieee80211_if_del_mgmt(local);
1448 write_lock_bh(&local->sub_if_lock);
1449 list_replace_init(&local->sub_if_list, &tmp_list);
1450 write_unlock_bh(&local->sub_if_lock);
1452 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1453 __ieee80211_if_del(local, sdata);
1457 if (local->stat_time)
1458 del_timer_sync(&local->stat_timer);
1460 ieee80211_rx_bss_list_deinit(local->mdev);
1461 ieee80211_clear_tx_pending(local);
1462 sta_info_stop(local);
1463 rate_control_deinitialize(local);
1464 debugfs_hw_del(local);
1466 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1467 kfree(local->supp_rates[i]);
1468 kfree(local->basic_rates[i]);
1471 if (skb_queue_len(&local->skb_queue)
1472 || skb_queue_len(&local->skb_queue_unreliable))
1473 printk(KERN_WARNING "%s: skb_queue not empty\n",
1475 skb_queue_purge(&local->skb_queue);
1476 skb_queue_purge(&local->skb_queue_unreliable);
1478 destroy_workqueue(local->hw.workqueue);
1479 wiphy_unregister(local->hw.wiphy);
1480 ieee80211_wep_free(local);
1481 ieee80211_led_exit(local);
1483 EXPORT_SYMBOL(ieee80211_unregister_hw);
1485 void ieee80211_free_hw(struct ieee80211_hw *hw)
1487 struct ieee80211_local *local = hw_to_local(hw);
1489 ieee80211_if_free(local->mdev);
1490 wiphy_free(local->hw.wiphy);
1492 EXPORT_SYMBOL(ieee80211_free_hw);
1494 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1496 struct ieee80211_sub_if_data *sdata;
1497 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1498 return &sdata->stats;
1501 static int __init ieee80211_init(void)
1503 struct sk_buff *skb;
1506 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1508 ret = ieee80211_wme_register();
1510 printk(KERN_DEBUG "ieee80211_init: failed to "
1511 "initialize WME (err=%d)\n", ret);
1515 ieee80211_debugfs_netdev_init();
1516 ieee80211_regdomain_init();
1521 static void __exit ieee80211_exit(void)
1523 ieee80211_wme_unregister();
1524 ieee80211_debugfs_netdev_exit();
1528 subsys_initcall(ieee80211_init);
1529 module_exit(ieee80211_exit);
1531 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1532 MODULE_LICENSE("GPL");