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_i.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 int header_parse_80211(const struct sk_buff
*skb
, unsigned char *haddr
)
52 memcpy(haddr
, skb_mac_header(skb
) + 10, ETH_ALEN
); /* addr2 */
56 /* must be called under mdev tx lock */
57 static void ieee80211_configure_filter(struct ieee80211_local
*local
)
59 unsigned int changed_flags
;
60 unsigned int new_flags
= 0;
62 if (atomic_read(&local
->iff_promiscs
))
63 new_flags
|= FIF_PROMISC_IN_BSS
;
65 if (atomic_read(&local
->iff_allmultis
))
66 new_flags
|= FIF_ALLMULTI
;
69 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
71 if (local
->fif_fcsfail
)
72 new_flags
|= FIF_FCSFAIL
;
74 if (local
->fif_plcpfail
)
75 new_flags
|= FIF_PLCPFAIL
;
77 if (local
->fif_control
)
78 new_flags
|= FIF_CONTROL
;
80 if (local
->fif_other_bss
)
81 new_flags
|= FIF_OTHER_BSS
;
83 changed_flags
= local
->filter_flags
^ new_flags
;
88 local
->ops
->configure_filter(local_to_hw(local
),
89 changed_flags
, &new_flags
,
90 local
->mdev
->mc_count
,
91 local
->mdev
->mc_list
);
93 WARN_ON(new_flags
& (1<<31));
95 local
->filter_flags
= new_flags
& ~(1<<31);
98 /* master interface */
100 static int ieee80211_master_open(struct net_device
*dev
)
102 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
103 struct ieee80211_sub_if_data
*sdata
;
104 int res
= -EOPNOTSUPP
;
106 /* we hold the RTNL here so can safely walk the list */
107 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
108 if (netif_running(sdata
->dev
)) {
117 netif_tx_start_all_queues(local
->mdev
);
122 static int ieee80211_master_stop(struct net_device
*dev
)
124 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
125 struct ieee80211_sub_if_data
*sdata
;
127 /* we hold the RTNL here so can safely walk the list */
128 list_for_each_entry(sdata
, &local
->interfaces
, list
)
129 if (netif_running(sdata
->dev
))
130 dev_close(sdata
->dev
);
135 static void ieee80211_master_set_multicast_list(struct net_device
*dev
)
137 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
139 ieee80211_configure_filter(local
);
142 /* regular interfaces */
144 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
147 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
149 meshhdrlen
= (sdata
->vif
.type
== IEEE80211_IF_TYPE_MESH_POINT
) ? 5 : 0;
151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
154 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
158 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
159 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
160 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
165 static inline int identical_mac_addr_allowed(int type1
, int type2
)
167 return (type1
== IEEE80211_IF_TYPE_MNTR
||
168 type2
== IEEE80211_IF_TYPE_MNTR
||
169 (type1
== IEEE80211_IF_TYPE_AP
&&
170 type2
== IEEE80211_IF_TYPE_WDS
) ||
171 (type1
== IEEE80211_IF_TYPE_WDS
&&
172 (type2
== IEEE80211_IF_TYPE_WDS
||
173 type2
== IEEE80211_IF_TYPE_AP
)) ||
174 (type1
== IEEE80211_IF_TYPE_AP
&&
175 type2
== IEEE80211_IF_TYPE_VLAN
) ||
176 (type1
== IEEE80211_IF_TYPE_VLAN
&&
177 (type2
== IEEE80211_IF_TYPE_AP
||
178 type2
== IEEE80211_IF_TYPE_VLAN
)));
181 static int ieee80211_open(struct net_device
*dev
)
183 struct ieee80211_sub_if_data
*sdata
, *nsdata
;
184 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
185 struct sta_info
*sta
;
186 struct ieee80211_if_init_conf conf
;
189 bool need_hw_reconfig
= 0;
190 u8 null_addr
[ETH_ALEN
] = {0};
192 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
194 /* fail early if user set an invalid address */
195 if (compare_ether_addr(dev
->dev_addr
, null_addr
) &&
196 !is_valid_ether_addr(dev
->dev_addr
))
197 return -EADDRNOTAVAIL
;
199 /* we hold the RTNL here so can safely walk the list */
200 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
201 struct net_device
*ndev
= nsdata
->dev
;
203 if (ndev
!= dev
&& netif_running(ndev
)) {
205 * Allow only a single IBSS interface to be up at any
206 * time. This is restricted because beacon distribution
207 * cannot work properly if both are in the same IBSS.
209 * To remove this restriction we'd have to disallow them
210 * from setting the same SSID on different IBSS interfaces
211 * belonging to the same hardware. Then, however, we're
212 * faced with having to adopt two different TSF timers...
214 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
&&
215 nsdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
)
219 * The remaining checks are only performed for interfaces
220 * with the same MAC address.
222 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
226 * check whether it may have the same address
228 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
233 * can only add VLANs to enabled APs
235 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_VLAN
&&
236 nsdata
->vif
.type
== IEEE80211_IF_TYPE_AP
)
237 sdata
->bss
= &nsdata
->u
.ap
;
241 switch (sdata
->vif
.type
) {
242 case IEEE80211_IF_TYPE_WDS
:
243 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
246 case IEEE80211_IF_TYPE_VLAN
:
249 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
251 case IEEE80211_IF_TYPE_AP
:
252 sdata
->bss
= &sdata
->u
.ap
;
254 case IEEE80211_IF_TYPE_MESH_POINT
:
255 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
257 /* mesh ifaces must set allmulti to forward mcast traffic */
258 atomic_inc(&local
->iff_allmultis
);
260 case IEEE80211_IF_TYPE_STA
:
261 case IEEE80211_IF_TYPE_MNTR
:
262 case IEEE80211_IF_TYPE_IBSS
:
263 /* no special treatment */
265 case IEEE80211_IF_TYPE_INVALID
:
271 if (local
->open_count
== 0) {
273 if (local
->ops
->start
)
274 res
= local
->ops
->start(local_to_hw(local
));
277 need_hw_reconfig
= 1;
278 ieee80211_led_radio(local
, local
->hw
.conf
.radio_enabled
);
282 * Check all interfaces and copy the hopefully now-present
283 * MAC address to those that have the special null one.
285 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
286 struct net_device
*ndev
= nsdata
->dev
;
289 * No need to check netif_running since we do not allow
290 * it to start up with this invalid address.
292 if (compare_ether_addr(null_addr
, ndev
->dev_addr
) == 0)
293 memcpy(ndev
->dev_addr
,
294 local
->hw
.wiphy
->perm_addr
,
298 if (compare_ether_addr(null_addr
, local
->mdev
->dev_addr
) == 0)
299 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
,
303 * Validate the MAC address for this device.
305 if (!is_valid_ether_addr(dev
->dev_addr
)) {
306 if (!local
->open_count
&& local
->ops
->stop
)
307 local
->ops
->stop(local_to_hw(local
));
308 return -EADDRNOTAVAIL
;
311 switch (sdata
->vif
.type
) {
312 case IEEE80211_IF_TYPE_VLAN
:
313 /* no need to tell driver */
315 case IEEE80211_IF_TYPE_MNTR
:
316 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
317 local
->cooked_mntrs
++;
321 /* must be before the call to ieee80211_configure_filter */
323 if (local
->monitors
== 1)
324 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
326 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
327 local
->fif_fcsfail
++;
328 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
329 local
->fif_plcpfail
++;
330 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
331 local
->fif_control
++;
332 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
333 local
->fif_other_bss
++;
335 netif_addr_lock_bh(local
->mdev
);
336 ieee80211_configure_filter(local
);
337 netif_addr_unlock_bh(local
->mdev
);
339 case IEEE80211_IF_TYPE_STA
:
340 case IEEE80211_IF_TYPE_IBSS
:
341 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
344 conf
.vif
= &sdata
->vif
;
345 conf
.type
= sdata
->vif
.type
;
346 conf
.mac_addr
= dev
->dev_addr
;
347 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
351 if (ieee80211_vif_is_mesh(&sdata
->vif
))
352 ieee80211_start_mesh(sdata
);
353 changed
|= ieee80211_reset_erp_info(sdata
);
354 ieee80211_bss_info_change_notify(sdata
, changed
);
355 ieee80211_enable_keys(sdata
);
357 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
&&
358 !(sdata
->flags
& IEEE80211_SDATA_USERSPACE_MLME
))
359 netif_carrier_off(dev
);
361 netif_carrier_on(dev
);
364 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_WDS
) {
365 /* Create STA entry for the WDS peer */
366 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
370 goto err_del_interface
;
373 /* no locking required since STA is not live yet */
374 sta
->flags
|= WLAN_STA_AUTHORIZED
;
376 res
= sta_info_insert(sta
);
378 /* STA has been freed */
379 goto err_del_interface
;
383 if (local
->open_count
== 0) {
384 res
= dev_open(local
->mdev
);
387 goto err_del_interface
;
388 tasklet_enable(&local
->tx_pending_tasklet
);
389 tasklet_enable(&local
->tasklet
);
393 * set_multicast_list will be invoked by the networking core
394 * which will check whether any increments here were done in
395 * error and sync them down to the hardware as filter flags.
397 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
398 atomic_inc(&local
->iff_allmultis
);
400 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
401 atomic_inc(&local
->iff_promiscs
);
404 if (need_hw_reconfig
) {
405 ieee80211_hw_config(local
);
407 * set default queue parameters so drivers don't
408 * need to initialise the hardware if the hardware
409 * doesn't start up with sane defaults
411 ieee80211_set_wmm_default(sdata
);
415 * ieee80211_sta_work is disabled while network interface
416 * is down. Therefore, some configuration changes may not
417 * yet be effective. Trigger execution of ieee80211_sta_work
420 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
421 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
422 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
423 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
426 netif_tx_start_all_queues(dev
);
430 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
432 if (!local
->open_count
&& local
->ops
->stop
)
433 local
->ops
->stop(local_to_hw(local
));
436 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_VLAN
)
437 list_del(&sdata
->u
.vlan
.list
);
441 static int ieee80211_stop(struct net_device
*dev
)
443 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
444 struct ieee80211_local
*local
= sdata
->local
;
445 struct ieee80211_if_init_conf conf
;
446 struct sta_info
*sta
;
449 * Stop TX on this interface first.
451 netif_tx_stop_all_queues(dev
);
454 * Now delete all active aggregation sessions.
458 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
459 if (sta
->sdata
== sdata
)
460 ieee80211_sta_tear_down_BA_sessions(sdata
, sta
->addr
);
466 * Remove all stations associated with this interface.
468 * This must be done before calling ops->remove_interface()
469 * because otherwise we can later invoke ops->sta_notify()
470 * whenever the STAs are removed, and that invalidates driver
471 * assumptions about always getting a vif pointer that is valid
472 * (because if we remove a STA after ops->remove_interface()
473 * the driver will have removed the vif info already!)
475 * We could relax this and only unlink the stations from the
476 * hash table and list but keep them on a per-sdata list that
477 * will be inserted back again when the interface is brought
478 * up again, but I don't currently see a use case for that,
479 * except with WDS which gets a STA entry created when it is
482 sta_info_flush(local
, sdata
);
485 * Don't count this interface for promisc/allmulti while it
486 * is down. dev_mc_unsync() will invoke set_multicast_list
487 * on the master interface which will sync these down to the
488 * hardware as filter flags.
490 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
491 atomic_dec(&local
->iff_allmultis
);
493 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
494 atomic_dec(&local
->iff_promiscs
);
496 dev_mc_unsync(local
->mdev
, dev
);
498 /* APs need special treatment */
499 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
500 struct ieee80211_sub_if_data
*vlan
, *tmp
;
501 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
504 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
508 /* down all dependent devices, that is VLANs */
509 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
511 dev_close(vlan
->dev
);
512 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
517 switch (sdata
->vif
.type
) {
518 case IEEE80211_IF_TYPE_VLAN
:
519 list_del(&sdata
->u
.vlan
.list
);
520 /* no need to tell driver */
522 case IEEE80211_IF_TYPE_MNTR
:
523 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
524 local
->cooked_mntrs
--;
529 if (local
->monitors
== 0)
530 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
532 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
533 local
->fif_fcsfail
--;
534 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
535 local
->fif_plcpfail
--;
536 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
537 local
->fif_control
--;
538 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
539 local
->fif_other_bss
--;
541 netif_addr_lock_bh(local
->mdev
);
542 ieee80211_configure_filter(local
);
543 netif_addr_unlock_bh(local
->mdev
);
545 case IEEE80211_IF_TYPE_STA
:
546 case IEEE80211_IF_TYPE_IBSS
:
547 sdata
->u
.sta
.state
= IEEE80211_STA_MLME_DISABLED
;
548 memset(sdata
->u
.sta
.bssid
, 0, ETH_ALEN
);
549 del_timer_sync(&sdata
->u
.sta
.timer
);
551 * If the timer fired while we waited for it, it will have
552 * requeued the work. Now the work will be running again
553 * but will not rearm the timer again because it checks
554 * whether the interface is running, which, at this point,
557 cancel_work_sync(&sdata
->u
.sta
.work
);
559 * When we get here, the interface is marked down.
560 * Call synchronize_rcu() to wait for the RX path
561 * should it be using the interface and enqueuing
562 * frames at this very time on another CPU.
565 skb_queue_purge(&sdata
->u
.sta
.skb_queue
);
567 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PRIVACY_INVOKED
;
568 kfree(sdata
->u
.sta
.extra_ie
);
569 sdata
->u
.sta
.extra_ie
= NULL
;
570 sdata
->u
.sta
.extra_ie_len
= 0;
572 case IEEE80211_IF_TYPE_MESH_POINT
:
573 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
574 /* allmulti is always set on mesh ifaces */
575 atomic_dec(&local
->iff_allmultis
);
576 ieee80211_stop_mesh(sdata
);
580 if (local
->scan_sdata
== sdata
) {
581 if (!local
->ops
->hw_scan
)
582 cancel_delayed_work_sync(&local
->scan_work
);
584 * The software scan can no longer run now, so we can
585 * clear out the scan_sdata reference. However, the
586 * hardware scan may still be running. The complete
587 * function must be prepared to handle a NULL value.
589 local
->scan_sdata
= NULL
;
591 * The memory barrier guarantees that another CPU
592 * that is hardware-scanning will now see the fact
593 * that this interface is gone.
597 * If software scanning, complete the scan but since
598 * the scan_sdata is NULL already don't send out a
599 * scan event to userspace -- the scan is incomplete.
601 if (local
->sta_sw_scanning
)
602 ieee80211_scan_completed(&local
->hw
);
605 conf
.vif
= &sdata
->vif
;
606 conf
.type
= sdata
->vif
.type
;
607 conf
.mac_addr
= dev
->dev_addr
;
608 /* disable all keys for as long as this netdev is down */
609 ieee80211_disable_keys(sdata
);
610 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
615 if (local
->open_count
== 0) {
616 if (netif_running(local
->mdev
))
617 dev_close(local
->mdev
);
619 if (local
->ops
->stop
)
620 local
->ops
->stop(local_to_hw(local
));
622 ieee80211_led_radio(local
, 0);
624 flush_workqueue(local
->hw
.workqueue
);
626 tasklet_disable(&local
->tx_pending_tasklet
);
627 tasklet_disable(&local
->tasklet
);
633 static void ieee80211_set_multicast_list(struct net_device
*dev
)
635 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
636 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
637 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
639 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
640 promisc
= !!(dev
->flags
& IFF_PROMISC
);
641 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
642 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
644 if (allmulti
!= sdata_allmulti
) {
645 if (dev
->flags
& IFF_ALLMULTI
)
646 atomic_inc(&local
->iff_allmultis
);
648 atomic_dec(&local
->iff_allmultis
);
649 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
652 if (promisc
!= sdata_promisc
) {
653 if (dev
->flags
& IFF_PROMISC
)
654 atomic_inc(&local
->iff_promiscs
);
656 atomic_dec(&local
->iff_promiscs
);
657 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
660 dev_mc_sync(local
->mdev
, dev
);
663 static const struct header_ops ieee80211_header_ops
= {
664 .create
= eth_header
,
665 .parse
= header_parse_80211
,
666 .rebuild
= eth_rebuild_header
,
667 .cache
= eth_header_cache
,
668 .cache_update
= eth_header_cache_update
,
671 void ieee80211_if_setup(struct net_device
*dev
)
674 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
675 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
676 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
677 dev
->change_mtu
= ieee80211_change_mtu
;
678 dev
->open
= ieee80211_open
;
679 dev
->stop
= ieee80211_stop
;
680 dev
->destructor
= free_netdev
;
681 /* we will validate the address ourselves in ->open */
682 dev
->validate_addr
= NULL
;
685 /* everything else */
687 int ieee80211_if_config(struct ieee80211_sub_if_data
*sdata
, u32 changed
)
689 struct ieee80211_local
*local
= sdata
->local
;
690 struct ieee80211_if_conf conf
;
692 if (WARN_ON(!netif_running(sdata
->dev
)))
695 if (!local
->ops
->config_interface
)
698 memset(&conf
, 0, sizeof(conf
));
699 conf
.changed
= changed
;
701 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
702 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
703 conf
.bssid
= sdata
->u
.sta
.bssid
;
704 conf
.ssid
= sdata
->u
.sta
.ssid
;
705 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
706 } else if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
707 conf
.bssid
= sdata
->dev
->dev_addr
;
708 conf
.ssid
= sdata
->u
.ap
.ssid
;
709 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
710 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
711 u8 zero
[ETH_ALEN
] = { 0 };
720 if (WARN_ON(!conf
.bssid
&& (changed
& IEEE80211_IFCC_BSSID
)))
723 if (WARN_ON(!conf
.ssid
&& (changed
& IEEE80211_IFCC_SSID
)))
726 return local
->ops
->config_interface(local_to_hw(local
),
730 int ieee80211_hw_config(struct ieee80211_local
*local
)
732 struct ieee80211_channel
*chan
;
735 if (local
->sta_sw_scanning
)
736 chan
= local
->scan_channel
;
738 chan
= local
->oper_channel
;
740 local
->hw
.conf
.channel
= chan
;
742 if (!local
->hw
.conf
.power_level
)
743 local
->hw
.conf
.power_level
= chan
->max_power
;
745 local
->hw
.conf
.power_level
= min(chan
->max_power
,
746 local
->hw
.conf
.power_level
);
748 local
->hw
.conf
.max_antenna_gain
= chan
->max_antenna_gain
;
750 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
751 printk(KERN_DEBUG
"%s: HW CONFIG: freq=%d\n",
752 wiphy_name(local
->hw
.wiphy
), chan
->center_freq
);
755 if (local
->open_count
)
756 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
762 * ieee80211_handle_ht should be used only after legacy configuration
763 * has been determined namely band, as ht configuration depends upon
764 * the hardware's HT abilities for a _specific_ band.
766 u32
ieee80211_handle_ht(struct ieee80211_local
*local
, int enable_ht
,
767 struct ieee80211_ht_info
*req_ht_cap
,
768 struct ieee80211_ht_bss_info
*req_bss_cap
)
770 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
771 struct ieee80211_supported_band
*sband
;
772 struct ieee80211_ht_info ht_conf
;
773 struct ieee80211_ht_bss_info ht_bss_conf
;
776 u8 max_tx_streams
= IEEE80211_HT_CAP_MAX_STREAMS
;
779 sband
= local
->hw
.wiphy
->bands
[conf
->channel
->band
];
781 memset(&ht_conf
, 0, sizeof(struct ieee80211_ht_info
));
782 memset(&ht_bss_conf
, 0, sizeof(struct ieee80211_ht_bss_info
));
784 /* HT is not supported */
785 if (!sband
->ht_info
.ht_supported
) {
786 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
792 if (conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
)
793 changed
|= BSS_CHANGED_HT
;
794 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
795 conf
->ht_conf
.ht_supported
= 0;
800 if (!(conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
))
801 changed
|= BSS_CHANGED_HT
;
803 conf
->flags
|= IEEE80211_CONF_SUPPORT_HT_MODE
;
804 ht_conf
.ht_supported
= 1;
806 ht_conf
.cap
= req_ht_cap
->cap
& sband
->ht_info
.cap
;
807 ht_conf
.cap
&= ~(IEEE80211_HT_CAP_SM_PS
);
808 ht_conf
.cap
|= sband
->ht_info
.cap
& IEEE80211_HT_CAP_SM_PS
;
809 ht_bss_conf
.primary_channel
= req_bss_cap
->primary_channel
;
810 ht_bss_conf
.bss_cap
= req_bss_cap
->bss_cap
;
811 ht_bss_conf
.bss_op_mode
= req_bss_cap
->bss_op_mode
;
813 ht_conf
.ampdu_factor
= req_ht_cap
->ampdu_factor
;
814 ht_conf
.ampdu_density
= req_ht_cap
->ampdu_density
;
817 tx_mcs_set_cap
= sband
->ht_info
.supp_mcs_set
[12];
819 /* configure suppoerted Tx MCS according to requested MCS
820 * (based in most cases on Rx capabilities of peer) and self
821 * Tx MCS capabilities (as defined by low level driver HW
822 * Tx capabilities) */
823 if (!(tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_DEFINED
))
826 /* Counting from 0 therfore + 1 */
827 if (tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_RX_DIFF
)
828 max_tx_streams
= ((tx_mcs_set_cap
&
829 IEEE80211_HT_CAP_MCS_TX_STREAMS
) >> 2) + 1;
831 for (i
= 0; i
< max_tx_streams
; i
++)
832 ht_conf
.supp_mcs_set
[i
] =
833 sband
->ht_info
.supp_mcs_set
[i
] &
834 req_ht_cap
->supp_mcs_set
[i
];
836 if (tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_UEQM
)
837 for (i
= IEEE80211_SUPP_MCS_SET_UEQM
;
838 i
< IEEE80211_SUPP_MCS_SET_LEN
; i
++)
839 ht_conf
.supp_mcs_set
[i
] =
840 sband
->ht_info
.supp_mcs_set
[i
] &
841 req_ht_cap
->supp_mcs_set
[i
];
844 /* if bss configuration changed store the new one */
845 if (memcmp(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
)) ||
846 memcmp(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
))) {
847 changed
|= BSS_CHANGED_HT
;
848 memcpy(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
));
849 memcpy(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
));
855 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
858 struct ieee80211_local
*local
= sdata
->local
;
863 if (local
->ops
->bss_info_changed
)
864 local
->ops
->bss_info_changed(local_to_hw(local
),
870 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
872 sdata
->bss_conf
.use_cts_prot
= 0;
873 sdata
->bss_conf
.use_short_preamble
= 0;
874 return BSS_CHANGED_ERP_CTS_PROT
| BSS_CHANGED_ERP_PREAMBLE
;
877 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
880 struct ieee80211_local
*local
= hw_to_local(hw
);
881 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
884 skb
->dev
= local
->mdev
;
885 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
886 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
887 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
888 tmp
= skb_queue_len(&local
->skb_queue
) +
889 skb_queue_len(&local
->skb_queue_unreliable
);
890 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
891 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
892 dev_kfree_skb_irq(skb
);
894 I802_DEBUG_INC(local
->tx_status_drop
);
896 tasklet_schedule(&local
->tasklet
);
898 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
900 static void ieee80211_tasklet_handler(unsigned long data
)
902 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
904 struct ieee80211_rx_status rx_status
;
905 struct ieee80211_ra_tid
*ra_tid
;
907 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
908 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
909 switch (skb
->pkt_type
) {
910 case IEEE80211_RX_MSG
:
911 /* status is in skb->cb */
912 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
913 /* Clear skb->pkt_type in order to not confuse kernel
916 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
918 case IEEE80211_TX_STATUS_MSG
:
920 ieee80211_tx_status(local_to_hw(local
), skb
);
922 case IEEE80211_DELBA_MSG
:
923 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
924 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
925 ra_tid
->ra
, ra_tid
->tid
);
928 case IEEE80211_ADDBA_MSG
:
929 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
930 ieee80211_start_tx_ba_cb(local_to_hw(local
),
931 ra_tid
->ra
, ra_tid
->tid
);
942 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
943 * make a prepared TX frame (one that has been given to hw) to look like brand
944 * new IEEE 802.11 frame that is ready to go through TX processing again.
946 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
947 struct ieee80211_key
*key
,
950 unsigned int hdrlen
, iv_len
, mic_len
;
951 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
953 hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
958 switch (key
->conf
.alg
) {
961 mic_len
= WEP_ICV_LEN
;
964 iv_len
= TKIP_IV_LEN
;
965 mic_len
= TKIP_ICV_LEN
;
968 iv_len
= CCMP_HDR_LEN
;
969 mic_len
= CCMP_MIC_LEN
;
975 if (skb
->len
>= hdrlen
+ mic_len
&&
976 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
977 skb_trim(skb
, skb
->len
- mic_len
);
978 if (skb
->len
>= hdrlen
+ iv_len
) {
979 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
980 hdr
= (struct ieee80211_hdr
*)skb_pull(skb
, iv_len
);
984 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
985 hdr
->frame_control
&= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA
);
986 memmove(skb
->data
+ IEEE80211_QOS_CTL_LEN
, skb
->data
,
987 hdrlen
- IEEE80211_QOS_CTL_LEN
);
988 skb_pull(skb
, IEEE80211_QOS_CTL_LEN
);
992 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
993 struct sta_info
*sta
,
996 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
998 sta
->tx_filtered_count
++;
1001 * Clear the TX filter mask for this STA when sending the next
1002 * packet. If the STA went to power save mode, this will happen
1003 * when it wakes up for the next time.
1005 set_sta_flags(sta
, WLAN_STA_CLEAR_PS_FILT
);
1008 * This code races in the following way:
1010 * (1) STA sends frame indicating it will go to sleep and does so
1011 * (2) hardware/firmware adds STA to filter list, passes frame up
1012 * (3) hardware/firmware processes TX fifo and suppresses a frame
1013 * (4) we get TX status before having processed the frame and
1014 * knowing that the STA has gone to sleep.
1016 * This is actually quite unlikely even when both those events are
1017 * processed from interrupts coming in quickly after one another or
1018 * even at the same time because we queue both TX status events and
1019 * RX frames to be processed by a tasklet and process them in the
1020 * same order that they were received or TX status last. Hence, there
1021 * is no race as long as the frame RX is processed before the next TX
1022 * status, which drivers can ensure, see below.
1024 * Note that this can only happen if the hardware or firmware can
1025 * actually add STAs to the filter list, if this is done by the
1026 * driver in response to set_tim() (which will only reduce the race
1027 * this whole filtering tries to solve, not completely solve it)
1028 * this situation cannot happen.
1030 * To completely solve this race drivers need to make sure that they
1031 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1033 * (b) always process RX events before TX status events if ordering
1034 * can be unknown, for example with different interrupt status
1037 if (test_sta_flags(sta
, WLAN_STA_PS
) &&
1038 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
1039 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
1040 skb_queue_tail(&sta
->tx_filtered
, skb
);
1044 if (!test_sta_flags(sta
, WLAN_STA_PS
) &&
1045 !(info
->flags
& IEEE80211_TX_CTL_REQUEUE
)) {
1046 /* Software retry the packet once */
1047 info
->flags
|= IEEE80211_TX_CTL_REQUEUE
;
1048 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
1049 dev_queue_xmit(skb
);
1053 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1054 if (net_ratelimit())
1055 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
1056 "queue_len=%d PS=%d @%lu\n",
1057 wiphy_name(local
->hw
.wiphy
),
1058 skb_queue_len(&sta
->tx_filtered
),
1059 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
1064 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
1066 struct sk_buff
*skb2
;
1067 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1068 struct ieee80211_local
*local
= hw_to_local(hw
);
1069 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1072 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
1073 struct ieee80211_sub_if_data
*sdata
;
1074 struct net_device
*prev_dev
= NULL
;
1075 struct sta_info
*sta
;
1079 if (info
->status
.excessive_retries
) {
1080 sta
= sta_info_get(local
, hdr
->addr1
);
1082 if (test_sta_flags(sta
, WLAN_STA_PS
)) {
1084 * The STA is in power save mode, so assume
1085 * that this TX packet failed because of that.
1087 ieee80211_handle_filtered_frame(local
, sta
, skb
);
1094 fc
= hdr
->frame_control
;
1096 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
1097 (ieee80211_is_data_qos(fc
))) {
1100 sta
= sta_info_get(local
, hdr
->addr1
);
1102 qc
= ieee80211_get_qos_ctl(hdr
);
1104 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
1105 & IEEE80211_SCTL_SEQ
);
1106 ieee80211_send_bar(sta
->sdata
, hdr
->addr1
,
1111 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
1112 sta
= sta_info_get(local
, hdr
->addr1
);
1114 ieee80211_handle_filtered_frame(local
, sta
, skb
);
1119 rate_control_tx_status(local
->mdev
, skb
);
1123 ieee80211_led_tx(local
, 0);
1126 * Fragments are passed to low-level drivers as separate skbs, so these
1127 * are actually fragments, not frames. Update frame counters only for
1128 * the first fragment of the frame. */
1130 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
1131 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
1133 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
1135 local
->dot11TransmittedFrameCount
++;
1136 if (is_multicast_ether_addr(hdr
->addr1
))
1137 local
->dot11MulticastTransmittedFrameCount
++;
1138 if (info
->status
.retry_count
> 0)
1139 local
->dot11RetryCount
++;
1140 if (info
->status
.retry_count
> 1)
1141 local
->dot11MultipleRetryCount
++;
1144 /* This counter shall be incremented for an acknowledged MPDU
1145 * with an individual address in the address 1 field or an MPDU
1146 * with a multicast address in the address 1 field of type Data
1148 if (!is_multicast_ether_addr(hdr
->addr1
) ||
1149 type
== IEEE80211_FTYPE_DATA
||
1150 type
== IEEE80211_FTYPE_MGMT
)
1151 local
->dot11TransmittedFragmentCount
++;
1154 local
->dot11FailedCount
++;
1157 /* this was a transmitted frame, but now we want to reuse it */
1161 * This is a bit racy but we can avoid a lot of work
1164 if (!local
->monitors
&& !local
->cooked_mntrs
) {
1169 /* send frame to monitor interfaces now */
1171 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
1172 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
1177 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
1178 skb_push(skb
, sizeof(*rthdr
));
1180 memset(rthdr
, 0, sizeof(*rthdr
));
1181 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
1182 rthdr
->hdr
.it_present
=
1183 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
1184 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
1186 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
1187 !is_multicast_ether_addr(hdr
->addr1
))
1188 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
1190 if ((info
->flags
& IEEE80211_TX_CTL_USE_RTS_CTS
) &&
1191 (info
->flags
& IEEE80211_TX_CTL_USE_CTS_PROTECT
))
1192 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
1193 else if (info
->flags
& IEEE80211_TX_CTL_USE_RTS_CTS
)
1194 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
1196 rthdr
->data_retries
= info
->status
.retry_count
;
1198 /* XXX: is this sufficient for BPF? */
1199 skb_set_mac_header(skb
, 0);
1200 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1201 skb
->pkt_type
= PACKET_OTHERHOST
;
1202 skb
->protocol
= htons(ETH_P_802_2
);
1203 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1206 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
1207 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MNTR
) {
1208 if (!netif_running(sdata
->dev
))
1212 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1214 skb2
->dev
= prev_dev
;
1219 prev_dev
= sdata
->dev
;
1223 skb
->dev
= prev_dev
;
1230 EXPORT_SYMBOL(ieee80211_tx_status
);
1232 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
1233 const struct ieee80211_ops
*ops
)
1235 struct ieee80211_local
*local
;
1237 struct wiphy
*wiphy
;
1239 /* Ensure 32-byte alignment of our private data and hw private data.
1240 * We use the wiphy priv data for both our ieee80211_local and for
1241 * the driver's private data
1243 * In memory it'll be like this:
1245 * +-------------------------+
1247 * +-------------------------+
1248 * | struct ieee80211_local |
1249 * +-------------------------+
1250 * | driver's private data |
1251 * +-------------------------+
1254 priv_size
= ((sizeof(struct ieee80211_local
) +
1255 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
1258 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
1263 wiphy
->privid
= mac80211_wiphy_privid
;
1265 local
= wiphy_priv(wiphy
);
1266 local
->hw
.wiphy
= wiphy
;
1268 local
->hw
.priv
= (char *)local
+
1269 ((sizeof(struct ieee80211_local
) +
1270 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
1273 BUG_ON(!ops
->start
);
1275 BUG_ON(!ops
->config
);
1276 BUG_ON(!ops
->add_interface
);
1277 BUG_ON(!ops
->remove_interface
);
1278 BUG_ON(!ops
->configure_filter
);
1281 local
->hw
.queues
= 1; /* default */
1283 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
1284 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
1285 local
->short_retry_limit
= 7;
1286 local
->long_retry_limit
= 4;
1287 local
->hw
.conf
.radio_enabled
= 1;
1289 INIT_LIST_HEAD(&local
->interfaces
);
1291 spin_lock_init(&local
->key_lock
);
1293 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
1295 sta_info_init(local
);
1297 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
1298 (unsigned long)local
);
1299 tasklet_disable(&local
->tx_pending_tasklet
);
1301 tasklet_init(&local
->tasklet
,
1302 ieee80211_tasklet_handler
,
1303 (unsigned long) local
);
1304 tasklet_disable(&local
->tasklet
);
1306 skb_queue_head_init(&local
->skb_queue
);
1307 skb_queue_head_init(&local
->skb_queue_unreliable
);
1309 return local_to_hw(local
);
1311 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1313 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1315 struct ieee80211_local
*local
= hw_to_local(hw
);
1318 enum ieee80211_band band
;
1319 struct net_device
*mdev
;
1320 struct wireless_dev
*mwdev
;
1323 * generic code guarantees at least one band,
1324 * set this very early because much code assumes
1325 * that hw.conf.channel is assigned
1327 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1328 struct ieee80211_supported_band
*sband
;
1330 sband
= local
->hw
.wiphy
->bands
[band
];
1332 /* init channel we're on */
1333 local
->hw
.conf
.channel
=
1334 local
->oper_channel
=
1335 local
->scan_channel
= &sband
->channels
[0];
1340 /* if low-level driver supports AP, we also support VLAN */
1341 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
))
1342 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
1344 /* mac80211 always supports monitor */
1345 local
->hw
.wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
1347 result
= wiphy_register(local
->hw
.wiphy
);
1352 * We use the number of queues for feature tests (QoS, HT) internally
1353 * so restrict them appropriately.
1355 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
1356 hw
->queues
= IEEE80211_MAX_QUEUES
;
1357 if (hw
->ampdu_queues
> IEEE80211_MAX_AMPDU_QUEUES
)
1358 hw
->ampdu_queues
= IEEE80211_MAX_AMPDU_QUEUES
;
1360 hw
->ampdu_queues
= 0;
1362 mdev
= alloc_netdev_mq(sizeof(struct wireless_dev
),
1363 "wmaster%d", ether_setup
,
1364 ieee80211_num_queues(hw
));
1366 goto fail_mdev_alloc
;
1368 mwdev
= netdev_priv(mdev
);
1369 mdev
->ieee80211_ptr
= mwdev
;
1370 mwdev
->wiphy
= local
->hw
.wiphy
;
1374 ieee80211_rx_bss_list_init(local
);
1376 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
1377 mdev
->open
= ieee80211_master_open
;
1378 mdev
->stop
= ieee80211_master_stop
;
1379 mdev
->type
= ARPHRD_IEEE80211
;
1380 mdev
->header_ops
= &ieee80211_header_ops
;
1381 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
1383 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1384 local
->hw
.workqueue
= create_freezeable_workqueue(name
);
1385 if (!local
->hw
.workqueue
) {
1387 goto fail_workqueue
;
1391 * The hardware needs headroom for sending the frame,
1392 * and we need some headroom for passing the frame to monitor
1393 * interfaces, but never both at the same time.
1395 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1396 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1398 debugfs_hw_add(local
);
1400 if (local
->hw
.conf
.beacon_int
< 10)
1401 local
->hw
.conf
.beacon_int
= 100;
1403 if (local
->hw
.max_listen_interval
== 0)
1404 local
->hw
.max_listen_interval
= 1;
1406 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
1408 local
->wstats_flags
|= local
->hw
.flags
& (IEEE80211_HW_SIGNAL_UNSPEC
|
1409 IEEE80211_HW_SIGNAL_DB
|
1410 IEEE80211_HW_SIGNAL_DBM
) ?
1411 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1412 local
->wstats_flags
|= local
->hw
.flags
& IEEE80211_HW_NOISE_DBM
?
1413 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1414 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
1415 local
->wstats_flags
|= IW_QUAL_DBM
;
1417 result
= sta_info_start(local
);
1422 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1426 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1427 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1429 result
= register_netdevice(local
->mdev
);
1433 result
= ieee80211_init_rate_ctrl_alg(local
,
1434 hw
->rate_control_algorithm
);
1436 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1437 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1441 result
= ieee80211_wep_init(local
);
1444 printk(KERN_DEBUG
"%s: Failed to initialize wep: %d\n",
1445 wiphy_name(local
->hw
.wiphy
), result
);
1449 local
->mdev
->select_queue
= ieee80211_select_queue
;
1451 /* add one default STA interface */
1452 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
1453 IEEE80211_IF_TYPE_STA
, NULL
);
1455 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1456 wiphy_name(local
->hw
.wiphy
));
1460 ieee80211_led_init(local
);
1465 rate_control_deinitialize(local
);
1467 unregister_netdevice(local
->mdev
);
1471 sta_info_stop(local
);
1473 debugfs_hw_del(local
);
1474 destroy_workqueue(local
->hw
.workqueue
);
1477 free_netdev(local
->mdev
);
1479 wiphy_unregister(local
->hw
.wiphy
);
1482 EXPORT_SYMBOL(ieee80211_register_hw
);
1484 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1486 struct ieee80211_local
*local
= hw_to_local(hw
);
1488 tasklet_kill(&local
->tx_pending_tasklet
);
1489 tasklet_kill(&local
->tasklet
);
1494 * At this point, interface list manipulations are fine
1495 * because the driver cannot be handing us frames any
1496 * more and the tasklet is killed.
1499 /* First, we remove all virtual interfaces. */
1500 ieee80211_remove_interfaces(local
);
1502 /* then, finally, remove the master interface */
1503 unregister_netdevice(local
->mdev
);
1507 ieee80211_rx_bss_list_deinit(local
);
1508 ieee80211_clear_tx_pending(local
);
1509 sta_info_stop(local
);
1510 rate_control_deinitialize(local
);
1511 debugfs_hw_del(local
);
1513 if (skb_queue_len(&local
->skb_queue
)
1514 || skb_queue_len(&local
->skb_queue_unreliable
))
1515 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1516 wiphy_name(local
->hw
.wiphy
));
1517 skb_queue_purge(&local
->skb_queue
);
1518 skb_queue_purge(&local
->skb_queue_unreliable
);
1520 destroy_workqueue(local
->hw
.workqueue
);
1521 wiphy_unregister(local
->hw
.wiphy
);
1522 ieee80211_wep_free(local
);
1523 ieee80211_led_exit(local
);
1524 free_netdev(local
->mdev
);
1526 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1528 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1530 struct ieee80211_local
*local
= hw_to_local(hw
);
1532 wiphy_free(local
->hw
.wiphy
);
1534 EXPORT_SYMBOL(ieee80211_free_hw
);
1536 static int __init
ieee80211_init(void)
1538 struct sk_buff
*skb
;
1541 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1542 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1543 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1545 ret
= rc80211_pid_init();
1549 ieee80211_debugfs_netdev_init();
1554 static void __exit
ieee80211_exit(void)
1559 * For key todo, it'll be empty by now but the work
1560 * might still be scheduled.
1562 flush_scheduled_work();
1567 ieee80211_debugfs_netdev_exit();
1571 subsys_initcall(ieee80211_init
);
1572 module_exit(ieee80211_exit
);
1574 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1575 MODULE_LICENSE("GPL");