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/net_namespace.h>
25 #include <net/cfg80211.h>
27 #include "ieee80211_common.h"
28 #include "ieee80211_i.h"
29 #include "ieee80211_rate.h"
33 #include "ieee80211_led.h"
34 #include "ieee80211_cfg.h"
36 #include "debugfs_netdev.h"
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
46 } __attribute__ ((packed));
48 /* common interface routines */
50 static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
52 struct ieee80211_sub_if_data *sdata;
53 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
54 return &(sdata->stats);
57 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
59 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
63 /* master interface */
65 static int ieee80211_master_open(struct net_device *dev)
67 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
68 struct ieee80211_sub_if_data *sdata;
69 int res = -EOPNOTSUPP;
71 read_lock(&local->sub_if_lock);
72 list_for_each_entry(sdata, &local->sub_if_list, list) {
73 if (sdata->dev != dev && netif_running(sdata->dev)) {
78 read_unlock(&local->sub_if_lock);
82 static int ieee80211_master_stop(struct net_device *dev)
84 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
85 struct ieee80211_sub_if_data *sdata;
87 read_lock(&local->sub_if_lock);
88 list_for_each_entry(sdata, &local->sub_if_list, list)
89 if (sdata->dev != dev && netif_running(sdata->dev))
90 dev_close(sdata->dev);
91 read_unlock(&local->sub_if_lock);
96 /* management interface */
99 ieee80211_fill_frame_info(struct ieee80211_local *local,
100 struct ieee80211_frame_info *fi,
101 struct ieee80211_rx_status *status)
105 struct ieee80211_rate *rate;
107 jiffies_to_timespec(jiffies, &ts);
108 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
110 fi->mactime = cpu_to_be64(status->mactime);
111 switch (status->phymode) {
112 case MODE_IEEE80211A:
113 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
115 case MODE_IEEE80211B:
116 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
118 case MODE_IEEE80211G:
119 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
121 case MODE_ATHEROS_TURBO:
123 htonl(ieee80211_phytype_dsss_dot11_turbo);
126 fi->phytype = htonl(0xAAAAAAAA);
129 fi->channel = htonl(status->channel);
130 rate = ieee80211_get_rate(local, status->phymode,
133 fi->datarate = htonl(rate->rate);
134 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
135 if (status->rate == rate->val)
136 fi->preamble = htonl(2); /* long */
137 else if (status->rate == rate->val2)
138 fi->preamble = htonl(1); /* short */
140 fi->preamble = htonl(0);
142 fi->datarate = htonl(0);
143 fi->preamble = htonl(0);
146 fi->antenna = htonl(status->antenna);
147 fi->priority = htonl(0xffffffff); /* no clue */
148 fi->ssi_type = htonl(ieee80211_ssi_raw);
149 fi->ssi_signal = htonl(status->ssi);
150 fi->ssi_noise = 0x00000000;
153 /* clear everything because we really don't know.
154 * the msg_type field isn't present on monitor frames
155 * so we don't know whether it will be present or not,
156 * but it's ok to not clear it since it'll be assigned
158 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
160 fi->ssi_type = htonl(ieee80211_ssi_none);
162 fi->version = htonl(IEEE80211_FI_VERSION);
163 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
166 /* this routine is actually not just for this, but also
167 * for pushing fake 'management' frames into userspace.
168 * it shall be replaced by a netlink-based system. */
170 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
171 struct ieee80211_rx_status *status, u32 msg_type)
173 struct ieee80211_frame_info *fi;
174 const size_t hlen = sizeof(struct ieee80211_frame_info);
175 struct ieee80211_sub_if_data *sdata;
177 skb->dev = local->apdev;
179 sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
181 if (skb_headroom(skb) < hlen) {
182 I802_DEBUG_INC(local->rx_expand_skb_head);
183 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
189 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
191 ieee80211_fill_frame_info(local, fi, status);
192 fi->msg_type = htonl(msg_type);
194 sdata->stats.rx_packets++;
195 sdata->stats.rx_bytes += skb->len;
197 skb_set_mac_header(skb, 0);
198 skb->ip_summed = CHECKSUM_UNNECESSARY;
199 skb->pkt_type = PACKET_OTHERHOST;
200 skb->protocol = htons(ETH_P_802_2);
201 memset(skb->cb, 0, sizeof(skb->cb));
205 void ieee80211_key_threshold_notify(struct net_device *dev,
206 struct ieee80211_key *key,
207 struct sta_info *sta)
209 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
211 struct ieee80211_msg_key_notification *msg;
213 /* if no one will get it anyway, don't even allocate it.
214 * unlikely because this is only relevant for APs
215 * where the device must be open... */
216 if (unlikely(!local->apdev))
219 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
220 sizeof(struct ieee80211_msg_key_notification));
224 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
225 msg = (struct ieee80211_msg_key_notification *)
226 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
227 msg->tx_rx_count = key->tx_rx_count;
228 memcpy(msg->ifname, dev->name, IFNAMSIZ);
230 memcpy(msg->addr, sta->addr, ETH_ALEN);
232 memset(msg->addr, 0xff, ETH_ALEN);
234 key->tx_rx_count = 0;
236 ieee80211_rx_mgmt(local, skb, NULL,
237 ieee80211_msg_key_threshold_notification);
240 static int ieee80211_mgmt_open(struct net_device *dev)
242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
244 if (!netif_running(local->mdev))
249 static int ieee80211_mgmt_stop(struct net_device *dev)
254 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
256 /* FIX: what would be proper limits for MTU?
257 * This interface uses 802.11 frames. */
258 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
259 printk(KERN_WARNING "%s: invalid MTU %d\n",
264 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
265 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
266 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
271 void ieee80211_if_mgmt_setup(struct net_device *dev)
274 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
275 dev->change_mtu = ieee80211_change_mtu_apdev;
276 dev->get_stats = ieee80211_get_stats;
277 dev->open = ieee80211_mgmt_open;
278 dev->stop = ieee80211_mgmt_stop;
279 dev->type = ARPHRD_IEEE80211_PRISM;
280 dev->hard_header_parse = header_parse_80211;
281 dev->uninit = ieee80211_if_reinit;
282 dev->destructor = ieee80211_if_free;
285 /* regular interfaces */
287 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
289 /* FIX: what would be proper limits for MTU?
290 * This interface uses 802.3 frames. */
291 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
292 printk(KERN_WARNING "%s: invalid MTU %d\n",
297 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
298 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
299 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
304 static inline int identical_mac_addr_allowed(int type1, int type2)
306 return (type1 == IEEE80211_IF_TYPE_MNTR ||
307 type2 == IEEE80211_IF_TYPE_MNTR ||
308 (type1 == IEEE80211_IF_TYPE_AP &&
309 type2 == IEEE80211_IF_TYPE_WDS) ||
310 (type1 == IEEE80211_IF_TYPE_WDS &&
311 (type2 == IEEE80211_IF_TYPE_WDS ||
312 type2 == IEEE80211_IF_TYPE_AP)) ||
313 (type1 == IEEE80211_IF_TYPE_AP &&
314 type2 == IEEE80211_IF_TYPE_VLAN) ||
315 (type1 == IEEE80211_IF_TYPE_VLAN &&
316 (type2 == IEEE80211_IF_TYPE_AP ||
317 type2 == IEEE80211_IF_TYPE_VLAN)));
320 /* Check if running monitor interfaces should go to a "soft monitor" mode
321 * and switch them if necessary. */
322 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
324 struct ieee80211_if_init_conf conf;
326 if (local->open_count && local->open_count == local->monitors &&
327 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
328 local->ops->remove_interface) {
330 conf.type = IEEE80211_IF_TYPE_MNTR;
331 conf.mac_addr = NULL;
332 local->ops->remove_interface(local_to_hw(local), &conf);
336 /* Check if running monitor interfaces should go to a "hard monitor" mode
337 * and switch them if necessary. */
338 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
340 struct ieee80211_if_init_conf conf;
342 if (local->open_count && local->open_count == local->monitors &&
343 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
345 conf.type = IEEE80211_IF_TYPE_MNTR;
346 conf.mac_addr = NULL;
347 local->ops->add_interface(local_to_hw(local), &conf);
351 static void ieee80211_if_open(struct net_device *dev)
353 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
355 switch (sdata->type) {
356 case IEEE80211_IF_TYPE_STA:
357 case IEEE80211_IF_TYPE_IBSS:
358 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
363 static int ieee80211_open(struct net_device *dev)
365 struct ieee80211_sub_if_data *sdata, *nsdata;
366 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
367 struct ieee80211_if_init_conf conf;
370 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
371 read_lock(&local->sub_if_lock);
372 list_for_each_entry(nsdata, &local->sub_if_list, list) {
373 struct net_device *ndev = nsdata->dev;
375 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
376 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
377 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
378 read_unlock(&local->sub_if_lock);
382 read_unlock(&local->sub_if_lock);
384 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
385 is_zero_ether_addr(sdata->u.wds.remote_addr))
388 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
389 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
390 /* run the interface in a "soft monitor" mode */
393 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
396 ieee80211_if_open(dev);
397 ieee80211_start_soft_monitor(local);
399 conf.if_id = dev->ifindex;
400 conf.type = sdata->type;
401 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
402 conf.mac_addr = NULL;
404 conf.mac_addr = dev->dev_addr;
405 res = local->ops->add_interface(local_to_hw(local), &conf);
407 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
408 ieee80211_start_hard_monitor(local);
412 if (local->open_count == 0) {
414 tasklet_enable(&local->tx_pending_tasklet);
415 tasklet_enable(&local->tasklet);
416 if (local->ops->open)
417 res = local->ops->open(local_to_hw(local));
419 res = dev_open(local->mdev);
421 if (local->ops->stop)
422 local->ops->stop(local_to_hw(local));
424 res = ieee80211_hw_config(local);
425 if (res && local->ops->stop)
426 local->ops->stop(local_to_hw(local));
427 else if (!res && local->apdev)
428 dev_open(local->apdev);
432 if (local->ops->remove_interface)
433 local->ops->remove_interface(local_to_hw(local),
440 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
442 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
444 ieee80211_if_config(dev);
445 ieee80211_reset_erp_info(dev);
446 ieee80211_enable_keys(sdata);
449 if (sdata->type == IEEE80211_IF_TYPE_STA &&
450 !local->user_space_mlme)
451 netif_carrier_off(dev);
453 netif_carrier_on(dev);
455 netif_start_queue(dev);
459 static void ieee80211_if_shutdown(struct net_device *dev)
461 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
462 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
465 switch (sdata->type) {
466 case IEEE80211_IF_TYPE_STA:
467 case IEEE80211_IF_TYPE_IBSS:
468 sdata->u.sta.state = IEEE80211_DISABLED;
469 del_timer_sync(&sdata->u.sta.timer);
471 * Holding the sub_if_lock for writing here blocks
472 * out the receive path and makes sure it's not
473 * currently processing a packet that may get
474 * added to the queue.
476 write_lock_bh(&local->sub_if_lock);
477 skb_queue_purge(&sdata->u.sta.skb_queue);
478 write_unlock_bh(&local->sub_if_lock);
480 if (!local->ops->hw_scan &&
481 local->scan_dev == sdata->dev) {
482 local->sta_scanning = 0;
483 cancel_delayed_work(&local->scan_work);
485 flush_workqueue(local->hw.workqueue);
490 static int ieee80211_stop(struct net_device *dev)
492 struct ieee80211_sub_if_data *sdata;
493 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
495 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
497 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
498 local->open_count > 1 &&
499 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
500 /* remove "soft monitor" interface */
503 if (!local->monitors)
504 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
508 netif_stop_queue(dev);
509 ieee80211_if_shutdown(dev);
511 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
513 if (!local->monitors)
514 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
516 /* disable all keys for as long as this netdev is down */
517 ieee80211_disable_keys(sdata);
521 if (local->open_count == 0) {
522 if (netif_running(local->mdev))
523 dev_close(local->mdev);
525 dev_close(local->apdev);
526 if (local->ops->stop)
527 local->ops->stop(local_to_hw(local));
528 tasklet_disable(&local->tx_pending_tasklet);
529 tasklet_disable(&local->tasklet);
531 if (local->ops->remove_interface) {
532 struct ieee80211_if_init_conf conf;
534 conf.if_id = dev->ifindex;
535 conf.type = sdata->type;
536 conf.mac_addr = dev->dev_addr;
537 local->ops->remove_interface(local_to_hw(local), &conf);
540 ieee80211_start_hard_monitor(local);
545 enum netif_tx_lock_class {
550 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
552 spin_lock_nested(&dev->_xmit_lock, subclass);
553 dev->xmit_lock_owner = smp_processor_id();
556 static void ieee80211_set_multicast_list(struct net_device *dev)
558 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
559 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
560 unsigned short flags;
562 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
563 if (((dev->flags & IFF_ALLMULTI) != 0) ^
564 ((sdata->flags & IEEE80211_SDATA_ALLMULTI) != 0)) {
565 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
566 local->iff_allmultis--;
568 local->iff_allmultis++;
569 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
571 if (((dev->flags & IFF_PROMISC) != 0) ^
572 ((sdata->flags & IEEE80211_SDATA_PROMISC) != 0)) {
573 if (sdata->flags & IEEE80211_SDATA_PROMISC)
574 local->iff_promiscs--;
576 local->iff_promiscs++;
577 sdata->flags ^= IEEE80211_SDATA_PROMISC;
579 if (dev->mc_count != sdata->mc_count) {
580 local->mc_count = local->mc_count - sdata->mc_count +
582 sdata->mc_count = dev->mc_count;
584 if (local->ops->set_multicast_list) {
585 flags = local->mdev->flags;
586 if (local->iff_allmultis)
587 flags |= IFF_ALLMULTI;
588 if (local->iff_promiscs)
589 flags |= IFF_PROMISC;
590 read_lock(&local->sub_if_lock);
591 local->ops->set_multicast_list(local_to_hw(local), flags,
593 read_unlock(&local->sub_if_lock);
595 netif_tx_unlock(local->mdev);
598 /* Must not be called for mdev and apdev */
599 void ieee80211_if_setup(struct net_device *dev)
602 dev->hard_start_xmit = ieee80211_subif_start_xmit;
603 dev->wireless_handlers = &ieee80211_iw_handler_def;
604 dev->set_multicast_list = ieee80211_set_multicast_list;
605 dev->change_mtu = ieee80211_change_mtu;
606 dev->get_stats = ieee80211_get_stats;
607 dev->open = ieee80211_open;
608 dev->stop = ieee80211_stop;
609 dev->uninit = ieee80211_if_reinit;
610 dev->destructor = ieee80211_if_free;
613 /* WDS specialties */
615 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
617 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
618 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
619 struct sta_info *sta;
621 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
624 /* Create STA entry for the new peer */
625 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
630 /* Remove STA entry for the old peer */
631 sta = sta_info_get(local, sdata->u.wds.remote_addr);
636 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
637 "peer " MAC_FMT "\n",
638 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
641 /* Update WDS link data */
642 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
647 /* everything else */
649 static int __ieee80211_if_config(struct net_device *dev,
650 struct sk_buff *beacon,
651 struct ieee80211_tx_control *control)
653 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
654 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
655 struct ieee80211_if_conf conf;
656 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
658 if (!local->ops->config_interface || !netif_running(dev))
661 memset(&conf, 0, sizeof(conf));
662 conf.type = sdata->type;
663 if (sdata->type == IEEE80211_IF_TYPE_STA ||
664 sdata->type == IEEE80211_IF_TYPE_IBSS) {
665 if (local->sta_scanning &&
666 local->scan_dev == dev)
667 conf.bssid = scan_bssid;
669 conf.bssid = sdata->u.sta.bssid;
670 conf.ssid = sdata->u.sta.ssid;
671 conf.ssid_len = sdata->u.sta.ssid_len;
672 conf.generic_elem = sdata->u.sta.extra_ie;
673 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
674 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
675 conf.ssid = sdata->u.ap.ssid;
676 conf.ssid_len = sdata->u.ap.ssid_len;
677 conf.generic_elem = sdata->u.ap.generic_elem;
678 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
679 conf.beacon = beacon;
680 conf.beacon_control = control;
682 return local->ops->config_interface(local_to_hw(local),
683 dev->ifindex, &conf);
686 int ieee80211_if_config(struct net_device *dev)
688 return __ieee80211_if_config(dev, NULL, NULL);
691 int ieee80211_if_config_beacon(struct net_device *dev)
693 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
694 struct ieee80211_tx_control control;
697 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
699 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
702 return __ieee80211_if_config(dev, skb, &control);
705 int ieee80211_hw_config(struct ieee80211_local *local)
707 struct ieee80211_hw_mode *mode;
708 struct ieee80211_channel *chan;
711 if (local->sta_scanning) {
712 chan = local->scan_channel;
713 mode = local->scan_hw_mode;
715 chan = local->oper_channel;
716 mode = local->oper_hw_mode;
719 local->hw.conf.channel = chan->chan;
720 local->hw.conf.channel_val = chan->val;
721 local->hw.conf.power_level = chan->power_level;
722 local->hw.conf.freq = chan->freq;
723 local->hw.conf.phymode = mode->mode;
724 local->hw.conf.antenna_max = chan->antenna_max;
725 local->hw.conf.chan = chan;
726 local->hw.conf.mode = mode;
728 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
729 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
730 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
731 local->hw.conf.phymode);
732 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
734 if (local->ops->config)
735 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
740 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
742 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
743 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
744 if (local->ops->erp_ie_changed)
745 local->ops->erp_ie_changed(local_to_hw(local), changes,
746 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
747 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
750 void ieee80211_reset_erp_info(struct net_device *dev)
752 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
754 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
755 IEEE80211_SDATA_SHORT_PREAMBLE);
756 ieee80211_erp_info_change_notify(dev,
757 IEEE80211_ERP_CHANGE_PROTECTION |
758 IEEE80211_ERP_CHANGE_PREAMBLE);
761 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
762 struct dev_mc_list *prev,
765 struct ieee80211_local *local = hw_to_local(hw);
766 struct ieee80211_sub_if_data *sdata = *ptr;
767 struct dev_mc_list *mc;
773 if (!prev || !prev->next) {
775 sdata = list_entry(sdata->list.next,
776 struct ieee80211_sub_if_data, list);
778 sdata = list_entry(local->sub_if_list.next,
779 struct ieee80211_sub_if_data, list);
780 if (&sdata->list != &local->sub_if_list)
781 mc = sdata->dev->mc_list;
790 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
792 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
794 struct ieee80211_tx_status *status)
796 struct ieee80211_local *local = hw_to_local(hw);
797 struct ieee80211_tx_status *saved;
800 skb->dev = local->mdev;
801 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
802 if (unlikely(!saved)) {
804 printk(KERN_WARNING "%s: Not enough memory, "
805 "dropping tx status", skb->dev->name);
806 /* should be dev_kfree_skb_irq, but due to this function being
807 * named _irqsafe instead of just _irq we can't be sure that
808 * people won't call it from non-irq contexts */
809 dev_kfree_skb_any(skb);
812 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
813 /* copy pointer to saved status into skb->cb for use by tasklet */
814 memcpy(skb->cb, &saved, sizeof(saved));
816 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
817 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
818 &local->skb_queue : &local->skb_queue_unreliable, skb);
819 tmp = skb_queue_len(&local->skb_queue) +
820 skb_queue_len(&local->skb_queue_unreliable);
821 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
822 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
823 memcpy(&saved, skb->cb, sizeof(saved));
825 dev_kfree_skb_irq(skb);
827 I802_DEBUG_INC(local->tx_status_drop);
829 tasklet_schedule(&local->tasklet);
831 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
833 static void ieee80211_tasklet_handler(unsigned long data)
835 struct ieee80211_local *local = (struct ieee80211_local *) data;
837 struct ieee80211_rx_status rx_status;
838 struct ieee80211_tx_status *tx_status;
840 while ((skb = skb_dequeue(&local->skb_queue)) ||
841 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
842 switch (skb->pkt_type) {
843 case IEEE80211_RX_MSG:
844 /* status is in skb->cb */
845 memcpy(&rx_status, skb->cb, sizeof(rx_status));
846 /* Clear skb->type in order to not confuse kernel
849 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
851 case IEEE80211_TX_STATUS_MSG:
852 /* get pointer to saved status out of skb->cb */
853 memcpy(&tx_status, skb->cb, sizeof(tx_status));
855 ieee80211_tx_status(local_to_hw(local),
859 default: /* should never get here! */
860 printk(KERN_ERR "%s: Unknown message type (%d)\n",
861 local->mdev->name, skb->pkt_type);
868 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
869 * make a prepared TX frame (one that has been given to hw) to look like brand
870 * new IEEE 802.11 frame that is ready to go through TX processing again.
871 * Also, tx_packet_data in cb is restored from tx_control. */
872 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
873 struct ieee80211_key *key,
875 struct ieee80211_tx_control *control)
877 int hdrlen, iv_len, mic_len;
878 struct ieee80211_tx_packet_data *pkt_data;
880 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
881 pkt_data->ifindex = control->ifindex;
883 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
884 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
885 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
886 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
887 if (control->flags & IEEE80211_TXCTL_REQUEUE)
888 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
889 if (control->type == IEEE80211_IF_TYPE_MGMT)
890 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
891 pkt_data->queue = control->queue;
893 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
898 switch (key->conf.alg) {
901 mic_len = WEP_ICV_LEN;
904 iv_len = TKIP_IV_LEN;
905 mic_len = TKIP_ICV_LEN;
908 iv_len = CCMP_HDR_LEN;
909 mic_len = CCMP_MIC_LEN;
915 if (skb->len >= mic_len &&
916 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
917 skb_trim(skb, skb->len - mic_len);
918 if (skb->len >= iv_len && skb->len > hdrlen) {
919 memmove(skb->data + iv_len, skb->data, hdrlen);
920 skb_pull(skb, iv_len);
925 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
926 u16 fc = le16_to_cpu(hdr->frame_control);
927 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
928 fc &= ~IEEE80211_STYPE_QOS_DATA;
929 hdr->frame_control = cpu_to_le16(fc);
930 memmove(skb->data + 2, skb->data, hdrlen - 2);
936 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
937 struct ieee80211_tx_status *status)
939 struct sk_buff *skb2;
940 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
941 struct ieee80211_local *local = hw_to_local(hw);
944 struct ieee80211_tx_status_rtap_hdr *rthdr;
945 struct ieee80211_sub_if_data *sdata;
950 "%s: ieee80211_tx_status called with NULL status\n",
956 if (status->excessive_retries) {
957 struct sta_info *sta;
958 sta = sta_info_get(local, hdr->addr1);
960 if (sta->flags & WLAN_STA_PS) {
961 /* The STA is in power save mode, so assume
962 * that this TX packet failed because of that.
964 status->excessive_retries = 0;
965 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
971 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
972 struct sta_info *sta;
973 sta = sta_info_get(local, hdr->addr1);
975 sta->tx_filtered_count++;
977 /* Clear the TX filter mask for this STA when sending
978 * the next packet. If the STA went to power save mode,
979 * this will happen when it is waking up for the next
981 sta->clear_dst_mask = 1;
983 /* TODO: Is the WLAN_STA_PS flag always set here or is
984 * the race between RX and TX status causing some
985 * packets to be filtered out before 80211.o gets an
986 * update for PS status? This seems to be the case, so
987 * no changes are likely to be needed. */
988 if (sta->flags & WLAN_STA_PS &&
989 skb_queue_len(&sta->tx_filtered) <
991 ieee80211_remove_tx_extra(local, sta->key,
994 skb_queue_tail(&sta->tx_filtered, skb);
995 } else if (!(sta->flags & WLAN_STA_PS) &&
996 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
997 /* Software retry the packet once */
998 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
999 ieee80211_remove_tx_extra(local, sta->key,
1002 dev_queue_xmit(skb);
1004 if (net_ratelimit()) {
1005 printk(KERN_DEBUG "%s: dropped TX "
1006 "filtered frame queue_len=%d "
1011 !!(sta->flags & WLAN_STA_PS),
1020 /* FIXME: STUPID to call this with both local and local->mdev */
1021 rate_control_tx_status(local, local->mdev, skb, status);
1024 ieee80211_led_tx(local, 0);
1027 * Fragments are passed to low-level drivers as separate skbs, so these
1028 * are actually fragments, not frames. Update frame counters only for
1029 * the first fragment of the frame. */
1031 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1032 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1034 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1036 local->dot11TransmittedFrameCount++;
1037 if (is_multicast_ether_addr(hdr->addr1))
1038 local->dot11MulticastTransmittedFrameCount++;
1039 if (status->retry_count > 0)
1040 local->dot11RetryCount++;
1041 if (status->retry_count > 1)
1042 local->dot11MultipleRetryCount++;
1045 /* This counter shall be incremented for an acknowledged MPDU
1046 * with an individual address in the address 1 field or an MPDU
1047 * with a multicast address in the address 1 field of type Data
1049 if (!is_multicast_ether_addr(hdr->addr1) ||
1050 type == IEEE80211_FTYPE_DATA ||
1051 type == IEEE80211_FTYPE_MGMT)
1052 local->dot11TransmittedFragmentCount++;
1055 local->dot11FailedCount++;
1058 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1059 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1061 /* this was a transmitted frame, but now we want to reuse it */
1064 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1066 if (local->monitors) {
1067 skb2 = skb_clone(skb, GFP_ATOMIC);
1074 /* Send frame to hostapd */
1075 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1081 if (!local->monitors) {
1086 /* send frame to monitor interfaces now */
1088 if (skb_headroom(skb) < sizeof(*rthdr)) {
1089 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1094 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1095 skb_push(skb, sizeof(*rthdr));
1097 memset(rthdr, 0, sizeof(*rthdr));
1098 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1099 rthdr->hdr.it_present =
1100 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1101 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1103 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1104 !is_multicast_ether_addr(hdr->addr1))
1105 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1107 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1108 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1109 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1110 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1111 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1113 rthdr->data_retries = status->retry_count;
1115 read_lock(&local->sub_if_lock);
1116 monitors = local->monitors;
1117 list_for_each_entry(sdata, &local->sub_if_list, list) {
1119 * Using the monitors counter is possibly racy, but
1120 * if the value is wrong we simply either clone the skb
1121 * once too much or forget sending it to one monitor iface
1122 * The latter case isn't nice but fixing the race is much
1125 if (!monitors || !skb)
1128 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1129 if (!netif_running(sdata->dev))
1133 skb2 = skb_clone(skb, GFP_KERNEL);
1136 skb->dev = sdata->dev;
1137 /* XXX: is this sufficient for BPF? */
1138 skb_set_mac_header(skb, 0);
1139 skb->ip_summed = CHECKSUM_UNNECESSARY;
1140 skb->pkt_type = PACKET_OTHERHOST;
1141 skb->protocol = htons(ETH_P_802_2);
1142 memset(skb->cb, 0, sizeof(skb->cb));
1148 read_unlock(&local->sub_if_lock);
1152 EXPORT_SYMBOL(ieee80211_tx_status);
1154 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1155 const struct ieee80211_ops *ops)
1157 struct net_device *mdev;
1158 struct ieee80211_local *local;
1159 struct ieee80211_sub_if_data *sdata;
1161 struct wiphy *wiphy;
1163 /* Ensure 32-byte alignment of our private data and hw private data.
1164 * We use the wiphy priv data for both our ieee80211_local and for
1165 * the driver's private data
1167 * In memory it'll be like this:
1169 * +-------------------------+
1171 * +-------------------------+
1172 * | struct ieee80211_local |
1173 * +-------------------------+
1174 * | driver's private data |
1175 * +-------------------------+
1178 priv_size = ((sizeof(struct ieee80211_local) +
1179 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1182 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1187 wiphy->privid = mac80211_wiphy_privid;
1189 local = wiphy_priv(wiphy);
1190 local->hw.wiphy = wiphy;
1192 local->hw.priv = (char *)local +
1193 ((sizeof(struct ieee80211_local) +
1194 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1197 BUG_ON(!ops->config);
1198 BUG_ON(!ops->add_interface);
1201 /* for now, mdev needs sub_if_data :/ */
1202 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1203 "wmaster%d", ether_setup);
1209 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1210 mdev->ieee80211_ptr = &sdata->wdev;
1211 sdata->wdev.wiphy = wiphy;
1213 local->hw.queues = 1; /* default */
1216 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1217 local->rx_handlers = ieee80211_rx_handlers;
1218 local->tx_handlers = ieee80211_tx_handlers;
1220 local->bridge_packets = 1;
1222 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1223 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1224 local->short_retry_limit = 7;
1225 local->long_retry_limit = 4;
1226 local->hw.conf.radio_enabled = 1;
1228 local->enabled_modes = (unsigned int) -1;
1230 INIT_LIST_HEAD(&local->modes_list);
1232 rwlock_init(&local->sub_if_lock);
1233 INIT_LIST_HEAD(&local->sub_if_list);
1235 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1236 ieee80211_rx_bss_list_init(mdev);
1238 sta_info_init(local);
1240 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1241 mdev->open = ieee80211_master_open;
1242 mdev->stop = ieee80211_master_stop;
1243 mdev->type = ARPHRD_IEEE80211;
1244 mdev->hard_header_parse = header_parse_80211;
1246 sdata->type = IEEE80211_IF_TYPE_AP;
1248 sdata->local = local;
1249 sdata->u.ap.force_unicast_rateidx = -1;
1250 sdata->u.ap.max_ratectrl_rateidx = -1;
1251 ieee80211_if_sdata_init(sdata);
1252 list_add_tail(&sdata->list, &local->sub_if_list);
1254 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1255 (unsigned long)local);
1256 tasklet_disable(&local->tx_pending_tasklet);
1258 tasklet_init(&local->tasklet,
1259 ieee80211_tasklet_handler,
1260 (unsigned long) local);
1261 tasklet_disable(&local->tasklet);
1263 skb_queue_head_init(&local->skb_queue);
1264 skb_queue_head_init(&local->skb_queue_unreliable);
1266 return local_to_hw(local);
1268 EXPORT_SYMBOL(ieee80211_alloc_hw);
1270 int ieee80211_register_hw(struct ieee80211_hw *hw)
1272 struct ieee80211_local *local = hw_to_local(hw);
1276 result = wiphy_register(local->hw.wiphy);
1280 name = wiphy_dev(local->hw.wiphy)->driver->name;
1281 local->hw.workqueue = create_singlethread_workqueue(name);
1282 if (!local->hw.workqueue) {
1284 goto fail_workqueue;
1288 * The hardware needs headroom for sending the frame,
1289 * and we need some headroom for passing the frame to monitor
1290 * interfaces, but never both at the same time.
1292 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1293 sizeof(struct ieee80211_tx_status_rtap_hdr));
1295 debugfs_hw_add(local);
1297 local->hw.conf.beacon_int = 1000;
1299 local->wstats_flags |= local->hw.max_rssi ?
1300 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1301 local->wstats_flags |= local->hw.max_signal ?
1302 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1303 local->wstats_flags |= local->hw.max_noise ?
1304 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1305 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1306 local->wstats_flags |= IW_QUAL_DBM;
1308 result = sta_info_start(local);
1313 result = dev_alloc_name(local->mdev, local->mdev->name);
1317 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1318 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1320 result = register_netdevice(local->mdev);
1324 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1326 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1328 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1329 "algorithm\n", local->mdev->name);
1333 result = ieee80211_wep_init(local);
1336 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1341 ieee80211_install_qdisc(local->mdev);
1343 /* add one default STA interface */
1344 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1345 IEEE80211_IF_TYPE_STA);
1347 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1350 local->reg_state = IEEE80211_DEV_REGISTERED;
1353 ieee80211_led_init(local);
1358 rate_control_deinitialize(local);
1360 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1361 unregister_netdevice(local->mdev);
1364 sta_info_stop(local);
1366 debugfs_hw_del(local);
1367 destroy_workqueue(local->hw.workqueue);
1369 wiphy_unregister(local->hw.wiphy);
1372 EXPORT_SYMBOL(ieee80211_register_hw);
1374 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1375 struct ieee80211_hw_mode *mode)
1377 struct ieee80211_local *local = hw_to_local(hw);
1378 struct ieee80211_rate *rate;
1381 INIT_LIST_HEAD(&mode->list);
1382 list_add_tail(&mode->list, &local->modes_list);
1384 local->hw_modes |= (1 << mode->mode);
1385 for (i = 0; i < mode->num_rates; i++) {
1386 rate = &(mode->rates[i]);
1387 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1389 ieee80211_prepare_rates(local, mode);
1391 if (!local->oper_hw_mode) {
1392 /* Default to this mode */
1393 local->hw.conf.phymode = mode->mode;
1394 local->oper_hw_mode = local->scan_hw_mode = mode;
1395 local->oper_channel = local->scan_channel = &mode->channels[0];
1396 local->hw.conf.mode = local->oper_hw_mode;
1397 local->hw.conf.chan = local->oper_channel;
1400 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1401 ieee80211_set_default_regdomain(mode);
1405 EXPORT_SYMBOL(ieee80211_register_hwmode);
1407 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1409 struct ieee80211_local *local = hw_to_local(hw);
1410 struct ieee80211_sub_if_data *sdata, *tmp;
1411 struct list_head tmp_list;
1414 tasklet_kill(&local->tx_pending_tasklet);
1415 tasklet_kill(&local->tasklet);
1419 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1421 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1423 ieee80211_if_del_mgmt(local);
1425 write_lock_bh(&local->sub_if_lock);
1426 list_replace_init(&local->sub_if_list, &tmp_list);
1427 write_unlock_bh(&local->sub_if_lock);
1429 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1430 __ieee80211_if_del(local, sdata);
1434 ieee80211_rx_bss_list_deinit(local->mdev);
1435 ieee80211_clear_tx_pending(local);
1436 sta_info_stop(local);
1437 rate_control_deinitialize(local);
1438 debugfs_hw_del(local);
1440 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1441 kfree(local->supp_rates[i]);
1442 kfree(local->basic_rates[i]);
1445 if (skb_queue_len(&local->skb_queue)
1446 || skb_queue_len(&local->skb_queue_unreliable))
1447 printk(KERN_WARNING "%s: skb_queue not empty\n",
1449 skb_queue_purge(&local->skb_queue);
1450 skb_queue_purge(&local->skb_queue_unreliable);
1452 destroy_workqueue(local->hw.workqueue);
1453 wiphy_unregister(local->hw.wiphy);
1454 ieee80211_wep_free(local);
1455 ieee80211_led_exit(local);
1457 EXPORT_SYMBOL(ieee80211_unregister_hw);
1459 void ieee80211_free_hw(struct ieee80211_hw *hw)
1461 struct ieee80211_local *local = hw_to_local(hw);
1463 ieee80211_if_free(local->mdev);
1464 wiphy_free(local->hw.wiphy);
1466 EXPORT_SYMBOL(ieee80211_free_hw);
1468 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1470 struct ieee80211_sub_if_data *sdata;
1471 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1472 return &sdata->stats;
1475 static int __init ieee80211_init(void)
1477 struct sk_buff *skb;
1480 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1482 ret = ieee80211_wme_register();
1484 printk(KERN_DEBUG "ieee80211_init: failed to "
1485 "initialize WME (err=%d)\n", ret);
1489 ieee80211_debugfs_netdev_init();
1490 ieee80211_regdomain_init();
1495 static void __exit ieee80211_exit(void)
1497 ieee80211_wme_unregister();
1498 ieee80211_debugfs_netdev_exit();
1502 subsys_initcall(ieee80211_init);
1503 module_exit(ieee80211_exit);
1505 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1506 MODULE_LICENSE("GPL");