2 * Interface handling (except master interface)
4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 #include <linux/kernel.h>
14 #include <linux/if_arp.h>
15 #include <linux/netdevice.h>
16 #include <linux/rtnetlink.h>
17 #include <net/mac80211.h>
18 #include "ieee80211_i.h"
20 #include "debugfs_netdev.h"
25 * DOC: Interface list locking
27 * The interface list in each struct ieee80211_local is protected
30 * (1) modifications may only be done under the RTNL
31 * (2) modifications and readers are protected against each other by
33 * (3) modifications are done in an RCU manner so atomic readers
34 * can traverse the list in RCU-safe blocks.
36 * As a consequence, reads (traversals) of the list can be protected
37 * by either the RTNL, the iflist_mtx or RCU.
41 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
44 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
46 meshhdrlen
= (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) ? 5 : 0;
48 /* FIX: what would be proper limits for MTU?
49 * This interface uses 802.3 frames. */
51 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
55 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
56 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
57 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
62 static inline int identical_mac_addr_allowed(int type1
, int type2
)
64 return type1
== NL80211_IFTYPE_MONITOR
||
65 type2
== NL80211_IFTYPE_MONITOR
||
66 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
67 (type1
== NL80211_IFTYPE_WDS
&&
68 (type2
== NL80211_IFTYPE_WDS
||
69 type2
== NL80211_IFTYPE_AP
)) ||
70 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
71 (type1
== NL80211_IFTYPE_AP_VLAN
&&
72 (type2
== NL80211_IFTYPE_AP
||
73 type2
== NL80211_IFTYPE_AP_VLAN
));
76 static int ieee80211_open(struct net_device
*dev
)
78 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
79 struct ieee80211_sub_if_data
*nsdata
;
80 struct ieee80211_local
*local
= sdata
->local
;
82 struct ieee80211_if_init_conf conf
;
85 u32 hw_reconf_flags
= 0;
86 u8 null_addr
[ETH_ALEN
] = {0};
88 /* fail early if user set an invalid address */
89 if (compare_ether_addr(dev
->dev_addr
, null_addr
) &&
90 !is_valid_ether_addr(dev
->dev_addr
))
91 return -EADDRNOTAVAIL
;
93 /* we hold the RTNL here so can safely walk the list */
94 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
95 struct net_device
*ndev
= nsdata
->dev
;
97 if (ndev
!= dev
&& netif_running(ndev
)) {
99 * Allow only a single IBSS interface to be up at any
100 * time. This is restricted because beacon distribution
101 * cannot work properly if both are in the same IBSS.
103 * To remove this restriction we'd have to disallow them
104 * from setting the same SSID on different IBSS interfaces
105 * belonging to the same hardware. Then, however, we're
106 * faced with having to adopt two different TSF timers...
108 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
109 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
113 * The remaining checks are only performed for interfaces
114 * with the same MAC address.
116 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
120 * check whether it may have the same address
122 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
127 * can only add VLANs to enabled APs
129 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
130 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
131 sdata
->bss
= &nsdata
->u
.ap
;
135 switch (sdata
->vif
.type
) {
136 case NL80211_IFTYPE_WDS
:
137 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
140 case NL80211_IFTYPE_AP_VLAN
:
143 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
145 case NL80211_IFTYPE_AP
:
146 sdata
->bss
= &sdata
->u
.ap
;
148 case NL80211_IFTYPE_MESH_POINT
:
149 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
151 /* mesh ifaces must set allmulti to forward mcast traffic */
152 atomic_inc(&local
->iff_allmultis
);
154 case NL80211_IFTYPE_STATION
:
155 case NL80211_IFTYPE_MONITOR
:
156 case NL80211_IFTYPE_ADHOC
:
157 /* no special treatment */
159 case NL80211_IFTYPE_UNSPECIFIED
:
160 case __NL80211_IFTYPE_AFTER_LAST
:
166 if (local
->open_count
== 0) {
168 if (local
->ops
->start
)
169 res
= local
->ops
->start(local_to_hw(local
));
172 /* we're brought up, everything changes */
173 hw_reconf_flags
= ~0;
174 ieee80211_led_radio(local
, local
->hw
.conf
.radio_enabled
);
178 * Check all interfaces and copy the hopefully now-present
179 * MAC address to those that have the special null one.
181 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
182 struct net_device
*ndev
= nsdata
->dev
;
185 * No need to check netif_running since we do not allow
186 * it to start up with this invalid address.
188 if (compare_ether_addr(null_addr
, ndev
->dev_addr
) == 0)
189 memcpy(ndev
->dev_addr
,
190 local
->hw
.wiphy
->perm_addr
,
194 if (compare_ether_addr(null_addr
, local
->mdev
->dev_addr
) == 0)
195 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
,
199 * Validate the MAC address for this device.
201 if (!is_valid_ether_addr(dev
->dev_addr
)) {
202 if (!local
->open_count
&& local
->ops
->stop
)
203 local
->ops
->stop(local_to_hw(local
));
204 return -EADDRNOTAVAIL
;
207 switch (sdata
->vif
.type
) {
208 case NL80211_IFTYPE_AP_VLAN
:
209 /* no need to tell driver */
211 case NL80211_IFTYPE_MONITOR
:
212 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
213 local
->cooked_mntrs
++;
217 /* must be before the call to ieee80211_configure_filter */
219 if (local
->monitors
== 1) {
220 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
221 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_RADIOTAP
;
224 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
225 local
->fif_fcsfail
++;
226 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
227 local
->fif_plcpfail
++;
228 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
229 local
->fif_control
++;
230 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
231 local
->fif_other_bss
++;
233 netif_addr_lock_bh(local
->mdev
);
234 ieee80211_configure_filter(local
);
235 netif_addr_unlock_bh(local
->mdev
);
237 case NL80211_IFTYPE_STATION
:
238 case NL80211_IFTYPE_ADHOC
:
239 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
240 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
242 sdata
->u
.ibss
.flags
&= ~IEEE80211_IBSS_PREV_BSSID_SET
;
245 conf
.vif
= &sdata
->vif
;
246 conf
.type
= sdata
->vif
.type
;
247 conf
.mac_addr
= dev
->dev_addr
;
248 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
252 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
253 local
->fif_other_bss
++;
254 netif_addr_lock_bh(local
->mdev
);
255 ieee80211_configure_filter(local
);
256 netif_addr_unlock_bh(local
->mdev
);
258 ieee80211_start_mesh(sdata
);
260 changed
|= ieee80211_reset_erp_info(sdata
);
261 ieee80211_bss_info_change_notify(sdata
, changed
);
262 ieee80211_enable_keys(sdata
);
264 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
265 netif_carrier_off(dev
);
267 netif_carrier_on(dev
);
270 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
271 /* Create STA entry for the WDS peer */
272 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
276 goto err_del_interface
;
279 /* no locking required since STA is not live yet */
280 sta
->flags
|= WLAN_STA_AUTHORIZED
;
282 res
= sta_info_insert(sta
);
284 /* STA has been freed */
285 goto err_del_interface
;
289 if (local
->open_count
== 0) {
290 res
= dev_open(local
->mdev
);
293 goto err_del_interface
;
294 tasklet_enable(&local
->tx_pending_tasklet
);
295 tasklet_enable(&local
->tasklet
);
299 * set_multicast_list will be invoked by the networking core
300 * which will check whether any increments here were done in
301 * error and sync them down to the hardware as filter flags.
303 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
304 atomic_inc(&local
->iff_allmultis
);
306 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
307 atomic_inc(&local
->iff_promiscs
);
310 if (hw_reconf_flags
) {
311 ieee80211_hw_config(local
, hw_reconf_flags
);
313 * set default queue parameters so drivers don't
314 * need to initialise the hardware if the hardware
315 * doesn't start up with sane defaults
317 ieee80211_set_wmm_default(sdata
);
320 ieee80211_recalc_ps(local
);
323 * ieee80211_sta_work is disabled while network interface
324 * is down. Therefore, some configuration changes may not
325 * yet be effective. Trigger execution of ieee80211_sta_work
328 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
329 queue_work(local
->hw
.workqueue
, &sdata
->u
.mgd
.work
);
330 else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
331 queue_work(local
->hw
.workqueue
, &sdata
->u
.ibss
.work
);
333 netif_tx_start_all_queues(dev
);
337 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
339 if (!local
->open_count
&& local
->ops
->stop
)
340 local
->ops
->stop(local_to_hw(local
));
343 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
344 list_del(&sdata
->u
.vlan
.list
);
348 static int ieee80211_stop(struct net_device
*dev
)
350 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
351 struct ieee80211_local
*local
= sdata
->local
;
352 struct ieee80211_if_init_conf conf
;
353 struct sta_info
*sta
;
354 u32 hw_reconf_flags
= 0;
357 * Stop TX on this interface first.
359 netif_tx_stop_all_queues(dev
);
362 * Now delete all active aggregation sessions.
366 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
367 if (sta
->sdata
== sdata
)
368 ieee80211_sta_tear_down_BA_sessions(sta
);
374 * Announce that we are leaving the network, in case we are a
375 * station interface type. This must be done before removing
376 * all stations associated with sta_info_flush, otherwise STA
377 * information will be gone and no announce being done.
379 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
380 if (sdata
->u
.mgd
.state
!= IEEE80211_STA_MLME_DISABLED
)
381 ieee80211_sta_deauthenticate(sdata
,
382 WLAN_REASON_DEAUTH_LEAVING
);
386 * Remove all stations associated with this interface.
388 * This must be done before calling ops->remove_interface()
389 * because otherwise we can later invoke ops->sta_notify()
390 * whenever the STAs are removed, and that invalidates driver
391 * assumptions about always getting a vif pointer that is valid
392 * (because if we remove a STA after ops->remove_interface()
393 * the driver will have removed the vif info already!)
395 * We could relax this and only unlink the stations from the
396 * hash table and list but keep them on a per-sdata list that
397 * will be inserted back again when the interface is brought
398 * up again, but I don't currently see a use case for that,
399 * except with WDS which gets a STA entry created when it is
402 sta_info_flush(local
, sdata
);
405 * Don't count this interface for promisc/allmulti while it
406 * is down. dev_mc_unsync() will invoke set_multicast_list
407 * on the master interface which will sync these down to the
408 * hardware as filter flags.
410 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
411 atomic_dec(&local
->iff_allmultis
);
413 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
414 atomic_dec(&local
->iff_promiscs
);
416 dev_mc_unsync(local
->mdev
, dev
);
417 del_timer_sync(&local
->dynamic_ps_timer
);
418 cancel_work_sync(&local
->dynamic_ps_enable_work
);
420 /* APs need special treatment */
421 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
422 struct ieee80211_sub_if_data
*vlan
, *tmp
;
423 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
426 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
430 /* down all dependent devices, that is VLANs */
431 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
433 dev_close(vlan
->dev
);
434 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
439 switch (sdata
->vif
.type
) {
440 case NL80211_IFTYPE_AP_VLAN
:
441 list_del(&sdata
->u
.vlan
.list
);
442 /* no need to tell driver */
444 case NL80211_IFTYPE_MONITOR
:
445 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
446 local
->cooked_mntrs
--;
451 if (local
->monitors
== 0) {
452 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
453 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_RADIOTAP
;
456 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
457 local
->fif_fcsfail
--;
458 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
459 local
->fif_plcpfail
--;
460 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
461 local
->fif_control
--;
462 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
463 local
->fif_other_bss
--;
465 netif_addr_lock_bh(local
->mdev
);
466 ieee80211_configure_filter(local
);
467 netif_addr_unlock_bh(local
->mdev
);
469 case NL80211_IFTYPE_STATION
:
470 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
471 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
472 del_timer_sync(&sdata
->u
.mgd
.timer
);
474 * If the timer fired while we waited for it, it will have
475 * requeued the work. Now the work will be running again
476 * but will not rearm the timer again because it checks
477 * whether the interface is running, which, at this point,
480 cancel_work_sync(&sdata
->u
.mgd
.work
);
481 cancel_work_sync(&sdata
->u
.mgd
.chswitch_work
);
483 cancel_work_sync(&sdata
->u
.mgd
.beacon_loss_work
);
486 * When we get here, the interface is marked down.
487 * Call synchronize_rcu() to wait for the RX path
488 * should it be using the interface and enqueuing
489 * frames at this very time on another CPU.
492 skb_queue_purge(&sdata
->u
.mgd
.skb_queue
);
494 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_PRIVACY_INVOKED
|
495 IEEE80211_STA_TKIP_WEP_USED
);
496 kfree(sdata
->u
.mgd
.extra_ie
);
497 sdata
->u
.mgd
.extra_ie
= NULL
;
498 sdata
->u
.mgd
.extra_ie_len
= 0;
500 case NL80211_IFTYPE_ADHOC
:
501 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
502 memset(sdata
->u
.ibss
.bssid
, 0, ETH_ALEN
);
503 del_timer_sync(&sdata
->u
.ibss
.timer
);
504 cancel_work_sync(&sdata
->u
.ibss
.work
);
506 skb_queue_purge(&sdata
->u
.ibss
.skb_queue
);
509 case NL80211_IFTYPE_MESH_POINT
:
510 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
511 /* other_bss and allmulti are always set on mesh
513 local
->fif_other_bss
--;
514 atomic_dec(&local
->iff_allmultis
);
516 netif_addr_lock_bh(local
->mdev
);
517 ieee80211_configure_filter(local
);
518 netif_addr_unlock_bh(local
->mdev
);
520 ieee80211_stop_mesh(sdata
);
524 if (local
->scan_sdata
== sdata
) {
525 if (!local
->ops
->hw_scan
)
526 cancel_delayed_work_sync(&local
->scan_work
);
528 * The software scan can no longer run now, so we can
529 * clear out the scan_sdata reference. However, the
530 * hardware scan may still be running. The complete
531 * function must be prepared to handle a NULL value.
533 local
->scan_sdata
= NULL
;
535 * The memory barrier guarantees that another CPU
536 * that is hardware-scanning will now see the fact
537 * that this interface is gone.
541 * If software scanning, complete the scan but since
542 * the scan_sdata is NULL already don't send out a
543 * scan event to userspace -- the scan is incomplete.
545 if (local
->sw_scanning
)
546 ieee80211_scan_completed(&local
->hw
, true);
549 conf
.vif
= &sdata
->vif
;
550 conf
.type
= sdata
->vif
.type
;
551 conf
.mac_addr
= dev
->dev_addr
;
552 /* disable all keys for as long as this netdev is down */
553 ieee80211_disable_keys(sdata
);
554 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
559 if (local
->open_count
== 0) {
560 if (netif_running(local
->mdev
))
561 dev_close(local
->mdev
);
563 if (local
->ops
->stop
)
564 local
->ops
->stop(local_to_hw(local
));
566 ieee80211_led_radio(local
, 0);
568 flush_workqueue(local
->hw
.workqueue
);
570 tasklet_disable(&local
->tx_pending_tasklet
);
571 tasklet_disable(&local
->tasklet
);
573 /* no reconfiguring after stop! */
577 ieee80211_recalc_ps(local
);
579 /* do after stop to avoid reconfiguring when we stop anyway */
581 ieee80211_hw_config(local
, hw_reconf_flags
);
586 static void ieee80211_set_multicast_list(struct net_device
*dev
)
588 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
589 struct ieee80211_local
*local
= sdata
->local
;
590 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
592 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
593 promisc
= !!(dev
->flags
& IFF_PROMISC
);
594 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
595 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
597 if (allmulti
!= sdata_allmulti
) {
598 if (dev
->flags
& IFF_ALLMULTI
)
599 atomic_inc(&local
->iff_allmultis
);
601 atomic_dec(&local
->iff_allmultis
);
602 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
605 if (promisc
!= sdata_promisc
) {
606 if (dev
->flags
& IFF_PROMISC
)
607 atomic_inc(&local
->iff_promiscs
);
609 atomic_dec(&local
->iff_promiscs
);
610 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
613 dev_mc_sync(local
->mdev
, dev
);
617 * Called when the netdev is removed or, by the code below, before
618 * the interface type changes.
620 static void ieee80211_teardown_sdata(struct net_device
*dev
)
622 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
623 struct ieee80211_local
*local
= sdata
->local
;
624 struct beacon_data
*beacon
;
629 /* free extra data */
630 ieee80211_free_keys(sdata
);
632 ieee80211_debugfs_remove_netdev(sdata
);
634 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
635 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
636 sdata
->fragment_next
= 0;
638 switch (sdata
->vif
.type
) {
639 case NL80211_IFTYPE_AP
:
640 beacon
= sdata
->u
.ap
.beacon
;
641 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
645 while ((skb
= skb_dequeue(&sdata
->u
.ap
.ps_bc_buf
))) {
646 local
->total_ps_buffered
--;
651 case NL80211_IFTYPE_MESH_POINT
:
652 if (ieee80211_vif_is_mesh(&sdata
->vif
))
653 mesh_rmc_free(sdata
);
655 case NL80211_IFTYPE_ADHOC
:
656 kfree_skb(sdata
->u
.ibss
.probe_resp
);
658 case NL80211_IFTYPE_STATION
:
659 kfree(sdata
->u
.mgd
.extra_ie
);
660 kfree(sdata
->u
.mgd
.assocreq_ies
);
661 kfree(sdata
->u
.mgd
.assocresp_ies
);
662 kfree(sdata
->u
.mgd
.sme_auth_ie
);
664 case NL80211_IFTYPE_WDS
:
665 case NL80211_IFTYPE_AP_VLAN
:
666 case NL80211_IFTYPE_MONITOR
:
668 case NL80211_IFTYPE_UNSPECIFIED
:
669 case __NL80211_IFTYPE_AFTER_LAST
:
674 flushed
= sta_info_flush(local
, sdata
);
678 static const struct net_device_ops ieee80211_dataif_ops
= {
679 .ndo_open
= ieee80211_open
,
680 .ndo_stop
= ieee80211_stop
,
681 .ndo_uninit
= ieee80211_teardown_sdata
,
682 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
683 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
684 .ndo_change_mtu
= ieee80211_change_mtu
,
685 .ndo_set_mac_address
= eth_mac_addr
,
688 static const struct net_device_ops ieee80211_monitorif_ops
= {
689 .ndo_open
= ieee80211_open
,
690 .ndo_stop
= ieee80211_stop
,
691 .ndo_uninit
= ieee80211_teardown_sdata
,
692 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
693 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
694 .ndo_change_mtu
= ieee80211_change_mtu
,
695 .ndo_set_mac_address
= eth_mac_addr
,
698 static void ieee80211_if_setup(struct net_device
*dev
)
701 dev
->netdev_ops
= &ieee80211_dataif_ops
;
702 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
703 dev
->destructor
= free_netdev
;
707 * Helper function to initialise an interface to a specific type.
709 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
710 enum nl80211_iftype type
)
712 /* clear type-dependent union */
713 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
715 /* and set some type-dependent values */
716 sdata
->vif
.type
= type
;
717 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
718 sdata
->wdev
.iftype
= type
;
720 /* only monitor differs */
721 sdata
->dev
->type
= ARPHRD_ETHER
;
724 case NL80211_IFTYPE_AP
:
725 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
726 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
728 case NL80211_IFTYPE_STATION
:
729 ieee80211_sta_setup_sdata(sdata
);
731 case NL80211_IFTYPE_ADHOC
:
732 ieee80211_ibss_setup_sdata(sdata
);
734 case NL80211_IFTYPE_MESH_POINT
:
735 if (ieee80211_vif_is_mesh(&sdata
->vif
))
736 ieee80211_mesh_init_sdata(sdata
);
738 case NL80211_IFTYPE_MONITOR
:
739 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
740 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
741 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
742 MONITOR_FLAG_OTHER_BSS
;
744 case NL80211_IFTYPE_WDS
:
745 case NL80211_IFTYPE_AP_VLAN
:
747 case NL80211_IFTYPE_UNSPECIFIED
:
748 case __NL80211_IFTYPE_AFTER_LAST
:
753 ieee80211_debugfs_add_netdev(sdata
);
756 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
757 enum nl80211_iftype type
)
761 if (type
== sdata
->vif
.type
)
764 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
765 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
766 type
== NL80211_IFTYPE_ADHOC
)
770 * We could, here, on changes between IBSS/STA/MESH modes,
771 * invoke an MLME function instead that disassociates etc.
772 * and goes into the requested mode.
775 if (netif_running(sdata
->dev
))
778 /* Purge and reset type-dependent state. */
779 ieee80211_teardown_sdata(sdata
->dev
);
780 ieee80211_setup_sdata(sdata
, type
);
782 /* reset some values that shouldn't be kept across type changes */
783 sdata
->vif
.bss_conf
.basic_rates
=
784 ieee80211_mandatory_rates(sdata
->local
,
785 sdata
->local
->hw
.conf
.channel
->band
);
786 sdata
->drop_unencrypted
= 0;
791 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
792 struct net_device
**new_dev
, enum nl80211_iftype type
,
793 struct vif_params
*params
)
795 struct net_device
*ndev
;
796 struct ieee80211_sub_if_data
*sdata
= NULL
;
801 ndev
= alloc_netdev(sizeof(*sdata
) + local
->hw
.vif_data_size
,
802 name
, ieee80211_if_setup
);
806 ndev
->needed_headroom
= local
->tx_headroom
+
807 4*6 /* four MAC addresses */
808 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
810 + 8 /* rfc1042/bridge tunnel */
811 - ETH_HLEN
/* ethernet hard_header_len */
812 + IEEE80211_ENCRYPT_HEADROOM
;
813 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
815 ret
= dev_alloc_name(ndev
, ndev
->name
);
819 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
820 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
821 ndev
->features
|= NETIF_F_NETNS_LOCAL
;
823 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
824 sdata
= netdev_priv(ndev
);
825 ndev
->ieee80211_ptr
= &sdata
->wdev
;
827 /* initialise type-independent data */
828 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
829 sdata
->local
= local
;
832 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
833 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
835 INIT_LIST_HEAD(&sdata
->key_list
);
837 sdata
->force_unicast_rateidx
= -1;
838 sdata
->max_ratectrl_rateidx
= -1;
840 /* setup type-dependent data */
841 ieee80211_setup_sdata(sdata
, type
);
843 ret
= register_netdevice(ndev
);
847 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
848 params
&& params
->mesh_id_len
)
849 ieee80211_sdata_set_mesh_id(sdata
,
853 mutex_lock(&local
->iflist_mtx
);
854 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
855 mutex_unlock(&local
->iflist_mtx
);
867 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
871 mutex_lock(&sdata
->local
->iflist_mtx
);
872 list_del_rcu(&sdata
->list
);
873 mutex_unlock(&sdata
->local
->iflist_mtx
);
876 unregister_netdevice(sdata
->dev
);
880 * Remove all interfaces, may only be called at hardware unregistration
881 * time because it doesn't do RCU-safe list removals.
883 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
885 struct ieee80211_sub_if_data
*sdata
, *tmp
;
889 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
891 * we cannot hold the iflist_mtx across unregister_netdevice,
892 * but we only need to hold it for list modifications to lock
893 * out readers since we're under the RTNL here as all other
896 mutex_lock(&local
->iflist_mtx
);
897 list_del(&sdata
->list
);
898 mutex_unlock(&local
->iflist_mtx
);
900 unregister_netdevice(sdata
->dev
);