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/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
22 #include "debugfs_netdev.h"
25 #include "driver-ops.h"
29 * DOC: Interface list locking
31 * The interface list in each struct ieee80211_local is protected
34 * (1) modifications may only be done under the RTNL
35 * (2) modifications and readers are protected against each other by
37 * (3) modifications are done in an RCU manner so atomic readers
38 * can traverse the list in RCU-safe blocks.
40 * As a consequence, reads (traversals) of the list can be protected
41 * by either the RTNL, the iflist_mtx or RCU.
45 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
48 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
50 meshhdrlen
= (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) ? 5 : 0;
52 /* FIX: what would be proper limits for MTU?
53 * This interface uses 802.3 frames. */
55 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
59 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
60 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
61 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
66 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
68 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
69 struct sockaddr
*sa
= addr
;
72 if (ieee80211_sdata_running(sdata
))
75 ret
= eth_mac_addr(dev
, sa
);
78 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
83 static inline int identical_mac_addr_allowed(int type1
, int type2
)
85 return type1
== NL80211_IFTYPE_MONITOR
||
86 type2
== NL80211_IFTYPE_MONITOR
||
87 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
88 (type1
== NL80211_IFTYPE_WDS
&&
89 (type2
== NL80211_IFTYPE_WDS
||
90 type2
== NL80211_IFTYPE_AP
)) ||
91 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
92 (type1
== NL80211_IFTYPE_AP_VLAN
&&
93 (type2
== NL80211_IFTYPE_AP
||
94 type2
== NL80211_IFTYPE_AP_VLAN
));
97 static int ieee80211_open(struct net_device
*dev
)
99 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
100 struct ieee80211_sub_if_data
*nsdata
;
101 struct ieee80211_local
*local
= sdata
->local
;
102 struct sta_info
*sta
;
105 u32 hw_reconf_flags
= 0;
106 u8 null_addr
[ETH_ALEN
] = {0};
108 /* fail early if user set an invalid address */
109 if (compare_ether_addr(dev
->dev_addr
, null_addr
) &&
110 !is_valid_ether_addr(dev
->dev_addr
))
111 return -EADDRNOTAVAIL
;
113 /* we hold the RTNL here so can safely walk the list */
114 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
115 struct net_device
*ndev
= nsdata
->dev
;
117 if (ndev
!= dev
&& ieee80211_sdata_running(nsdata
)) {
119 * Allow only a single IBSS interface to be up at any
120 * time. This is restricted because beacon distribution
121 * cannot work properly if both are in the same IBSS.
123 * To remove this restriction we'd have to disallow them
124 * from setting the same SSID on different IBSS interfaces
125 * belonging to the same hardware. Then, however, we're
126 * faced with having to adopt two different TSF timers...
128 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
129 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
133 * The remaining checks are only performed for interfaces
134 * with the same MAC address.
136 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
140 * check whether it may have the same address
142 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
147 * can only add VLANs to enabled APs
149 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
150 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
151 sdata
->bss
= &nsdata
->u
.ap
;
155 switch (sdata
->vif
.type
) {
156 case NL80211_IFTYPE_WDS
:
157 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
160 case NL80211_IFTYPE_AP_VLAN
:
163 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
165 case NL80211_IFTYPE_AP
:
166 sdata
->bss
= &sdata
->u
.ap
;
168 case NL80211_IFTYPE_MESH_POINT
:
169 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
171 /* mesh ifaces must set allmulti to forward mcast traffic */
172 atomic_inc(&local
->iff_allmultis
);
174 case NL80211_IFTYPE_STATION
:
175 case NL80211_IFTYPE_MONITOR
:
176 case NL80211_IFTYPE_ADHOC
:
177 /* no special treatment */
179 case NL80211_IFTYPE_UNSPECIFIED
:
180 case __NL80211_IFTYPE_AFTER_LAST
:
186 if (local
->open_count
== 0) {
187 res
= drv_start(local
);
190 if (local
->ops
->napi_poll
)
191 napi_enable(&local
->napi
);
192 /* we're brought up, everything changes */
193 hw_reconf_flags
= ~0;
194 ieee80211_led_radio(local
, true);
198 * Check all interfaces and copy the hopefully now-present
199 * MAC address to those that have the special null one.
201 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
202 struct net_device
*ndev
= nsdata
->dev
;
205 * No need to check running since we do not allow
206 * it to start up with this invalid address.
208 if (compare_ether_addr(null_addr
, ndev
->dev_addr
) == 0) {
209 memcpy(ndev
->dev_addr
,
210 local
->hw
.wiphy
->perm_addr
,
212 memcpy(ndev
->perm_addr
, ndev
->dev_addr
, ETH_ALEN
);
217 * Validate the MAC address for this device.
219 if (!is_valid_ether_addr(dev
->dev_addr
)) {
220 if (!local
->open_count
)
222 return -EADDRNOTAVAIL
;
225 switch (sdata
->vif
.type
) {
226 case NL80211_IFTYPE_AP_VLAN
:
227 /* no need to tell driver */
229 case NL80211_IFTYPE_MONITOR
:
230 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
231 local
->cooked_mntrs
++;
235 /* must be before the call to ieee80211_configure_filter */
237 if (local
->monitors
== 1) {
238 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
239 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
242 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
243 local
->fif_fcsfail
++;
244 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
245 local
->fif_plcpfail
++;
246 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
) {
247 local
->fif_control
++;
250 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
251 local
->fif_other_bss
++;
253 ieee80211_configure_filter(local
);
255 netif_carrier_on(dev
);
258 res
= drv_add_interface(local
, &sdata
->vif
);
262 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
263 local
->fif_other_bss
++;
264 ieee80211_configure_filter(local
);
266 ieee80211_start_mesh(sdata
);
267 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
270 ieee80211_configure_filter(local
);
273 changed
|= ieee80211_reset_erp_info(sdata
);
274 ieee80211_bss_info_change_notify(sdata
, changed
);
276 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
277 netif_carrier_off(dev
);
279 netif_carrier_on(dev
);
282 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
283 /* Create STA entry for the WDS peer */
284 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
288 goto err_del_interface
;
291 /* no locking required since STA is not live yet */
292 sta
->flags
|= WLAN_STA_AUTHORIZED
;
294 res
= sta_info_insert(sta
);
296 /* STA has been freed */
297 goto err_del_interface
;
302 * set_multicast_list will be invoked by the networking core
303 * which will check whether any increments here were done in
304 * error and sync them down to the hardware as filter flags.
306 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
307 atomic_inc(&local
->iff_allmultis
);
309 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
310 atomic_inc(&local
->iff_promiscs
);
312 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
315 if (hw_reconf_flags
) {
316 ieee80211_hw_config(local
, hw_reconf_flags
);
318 * set default queue parameters so drivers don't
319 * need to initialise the hardware if the hardware
320 * doesn't start up with sane defaults
322 ieee80211_set_wmm_default(sdata
);
325 ieee80211_recalc_ps(local
, -1);
327 netif_tx_start_all_queues(dev
);
331 drv_remove_interface(local
, &sdata
->vif
);
333 if (!local
->open_count
)
337 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
338 list_del(&sdata
->u
.vlan
.list
);
342 static int ieee80211_stop(struct net_device
*dev
)
344 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
345 struct ieee80211_local
*local
= sdata
->local
;
347 struct sk_buff
*skb
, *tmp
;
348 u32 hw_reconf_flags
= 0;
352 * Stop TX on this interface first.
354 netif_tx_stop_all_queues(dev
);
357 * Purge work for this interface.
359 ieee80211_work_purge(sdata
);
362 * Remove all stations associated with this interface.
364 * This must be done before calling ops->remove_interface()
365 * because otherwise we can later invoke ops->sta_notify()
366 * whenever the STAs are removed, and that invalidates driver
367 * assumptions about always getting a vif pointer that is valid
368 * (because if we remove a STA after ops->remove_interface()
369 * the driver will have removed the vif info already!)
371 * We could relax this and only unlink the stations from the
372 * hash table and list but keep them on a per-sdata list that
373 * will be inserted back again when the interface is brought
374 * up again, but I don't currently see a use case for that,
375 * except with WDS which gets a STA entry created when it is
378 sta_info_flush(local
, sdata
);
381 * Don't count this interface for promisc/allmulti while it
382 * is down. dev_mc_unsync() will invoke set_multicast_list
383 * on the master interface which will sync these down to the
384 * hardware as filter flags.
386 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
387 atomic_dec(&local
->iff_allmultis
);
389 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
390 atomic_dec(&local
->iff_promiscs
);
392 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
395 netif_addr_lock_bh(dev
);
396 spin_lock_bh(&local
->filter_lock
);
397 __hw_addr_unsync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
398 spin_unlock_bh(&local
->filter_lock
);
399 netif_addr_unlock_bh(dev
);
401 ieee80211_configure_filter(local
);
403 del_timer_sync(&local
->dynamic_ps_timer
);
404 cancel_work_sync(&local
->dynamic_ps_enable_work
);
406 /* APs need special treatment */
407 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
408 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
409 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
412 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
416 /* down all dependent devices, that is VLANs */
417 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
419 dev_close(vlan
->dev
);
420 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
425 switch (sdata
->vif
.type
) {
426 case NL80211_IFTYPE_AP_VLAN
:
427 list_del(&sdata
->u
.vlan
.list
);
428 /* no need to tell driver */
430 case NL80211_IFTYPE_MONITOR
:
431 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
432 local
->cooked_mntrs
--;
437 if (local
->monitors
== 0) {
438 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
439 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
442 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
443 local
->fif_fcsfail
--;
444 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
445 local
->fif_plcpfail
--;
446 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
) {
448 local
->fif_control
--;
450 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
451 local
->fif_other_bss
--;
453 ieee80211_configure_filter(local
);
455 case NL80211_IFTYPE_STATION
:
456 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
457 del_timer_sync(&sdata
->u
.mgd
.timer
);
458 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
459 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
461 * If any of the timers fired while we waited for it, it will
462 * have queued its work. Now the work will be running again
463 * but will not rearm the timer again because it checks
464 * whether the interface is running, which, at this point,
467 cancel_work_sync(&sdata
->u
.mgd
.chswitch_work
);
468 cancel_work_sync(&sdata
->u
.mgd
.monitor_work
);
469 cancel_work_sync(&sdata
->u
.mgd
.beacon_connection_loss_work
);
472 case NL80211_IFTYPE_ADHOC
:
473 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
474 del_timer_sync(&sdata
->u
.ibss
.timer
);
476 case NL80211_IFTYPE_MESH_POINT
:
477 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
478 /* other_bss and allmulti are always set on mesh
480 local
->fif_other_bss
--;
481 atomic_dec(&local
->iff_allmultis
);
483 ieee80211_configure_filter(local
);
485 ieee80211_stop_mesh(sdata
);
489 flush_work(&sdata
->work
);
491 * When we get here, the interface is marked down.
492 * Call synchronize_rcu() to wait for the RX path
493 * should it be using the interface and enqueuing
494 * frames at this very time on another CPU.
497 skb_queue_purge(&sdata
->skb_queue
);
499 if (local
->scan_sdata
== sdata
)
500 ieee80211_scan_cancel(local
);
503 * Disable beaconing for AP and mesh, IBSS can't
504 * still be joined to a network at this point.
506 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
507 sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) {
508 ieee80211_bss_info_change_notify(sdata
,
509 BSS_CHANGED_BEACON_ENABLED
);
512 /* free all remaining keys, there shouldn't be any */
513 ieee80211_free_keys(sdata
);
514 drv_remove_interface(local
, &sdata
->vif
);
519 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
521 ieee80211_recalc_ps(local
, -1);
523 if (local
->open_count
== 0) {
524 if (local
->ops
->napi_poll
)
525 napi_disable(&local
->napi
);
526 ieee80211_clear_tx_pending(local
);
527 ieee80211_stop_device(local
);
529 /* no reconfiguring after stop! */
533 /* do after stop to avoid reconfiguring when we stop anyway */
535 ieee80211_hw_config(local
, hw_reconf_flags
);
537 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
538 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
539 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
540 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
541 if (info
->control
.vif
== &sdata
->vif
) {
542 __skb_unlink(skb
, &local
->pending
[i
]);
543 dev_kfree_skb_irq(skb
);
547 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
552 static void ieee80211_set_multicast_list(struct net_device
*dev
)
554 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
555 struct ieee80211_local
*local
= sdata
->local
;
556 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
558 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
559 promisc
= !!(dev
->flags
& IFF_PROMISC
);
560 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
561 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
563 if (allmulti
!= sdata_allmulti
) {
564 if (dev
->flags
& IFF_ALLMULTI
)
565 atomic_inc(&local
->iff_allmultis
);
567 atomic_dec(&local
->iff_allmultis
);
568 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
571 if (promisc
!= sdata_promisc
) {
572 if (dev
->flags
& IFF_PROMISC
)
573 atomic_inc(&local
->iff_promiscs
);
575 atomic_dec(&local
->iff_promiscs
);
576 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
578 spin_lock_bh(&local
->filter_lock
);
579 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
580 spin_unlock_bh(&local
->filter_lock
);
581 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
585 * Called when the netdev is removed or, by the code below, before
586 * the interface type changes.
588 static void ieee80211_teardown_sdata(struct net_device
*dev
)
590 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
591 struct ieee80211_local
*local
= sdata
->local
;
592 struct beacon_data
*beacon
;
597 /* free extra data */
598 ieee80211_free_keys(sdata
);
600 ieee80211_debugfs_remove_netdev(sdata
);
602 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
603 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
604 sdata
->fragment_next
= 0;
606 switch (sdata
->vif
.type
) {
607 case NL80211_IFTYPE_AP
:
608 beacon
= sdata
->u
.ap
.beacon
;
609 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
613 while ((skb
= skb_dequeue(&sdata
->u
.ap
.ps_bc_buf
))) {
614 local
->total_ps_buffered
--;
619 case NL80211_IFTYPE_MESH_POINT
:
620 if (ieee80211_vif_is_mesh(&sdata
->vif
))
621 mesh_rmc_free(sdata
);
623 case NL80211_IFTYPE_ADHOC
:
624 if (WARN_ON(sdata
->u
.ibss
.presp
))
625 kfree_skb(sdata
->u
.ibss
.presp
);
627 case NL80211_IFTYPE_STATION
:
628 case NL80211_IFTYPE_WDS
:
629 case NL80211_IFTYPE_AP_VLAN
:
630 case NL80211_IFTYPE_MONITOR
:
632 case NL80211_IFTYPE_UNSPECIFIED
:
633 case __NL80211_IFTYPE_AFTER_LAST
:
638 flushed
= sta_info_flush(local
, sdata
);
642 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
645 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
648 static const struct net_device_ops ieee80211_dataif_ops
= {
649 .ndo_open
= ieee80211_open
,
650 .ndo_stop
= ieee80211_stop
,
651 .ndo_uninit
= ieee80211_teardown_sdata
,
652 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
653 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
654 .ndo_change_mtu
= ieee80211_change_mtu
,
655 .ndo_set_mac_address
= ieee80211_change_mac
,
656 .ndo_select_queue
= ieee80211_netdev_select_queue
,
659 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
662 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
663 struct ieee80211_local
*local
= sdata
->local
;
664 struct ieee80211_hdr
*hdr
;
665 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
668 if (local
->hw
.queues
< 4)
672 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
673 return 0; /* doesn't matter, frame will be dropped */
675 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
677 if (!ieee80211_is_data(hdr
->frame_control
)) {
679 return ieee802_1d_to_ac
[skb
->priority
];
681 if (!ieee80211_is_data_qos(hdr
->frame_control
)) {
683 return ieee802_1d_to_ac
[skb
->priority
];
686 p
= ieee80211_get_qos_ctl(hdr
);
687 skb
->priority
= *p
& IEEE80211_QOS_CTL_TAG1D_MASK
;
689 return ieee80211_downgrade_queue(local
, skb
);
692 static const struct net_device_ops ieee80211_monitorif_ops
= {
693 .ndo_open
= ieee80211_open
,
694 .ndo_stop
= ieee80211_stop
,
695 .ndo_uninit
= ieee80211_teardown_sdata
,
696 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
697 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
698 .ndo_change_mtu
= ieee80211_change_mtu
,
699 .ndo_set_mac_address
= eth_mac_addr
,
700 .ndo_select_queue
= ieee80211_monitor_select_queue
,
703 static void ieee80211_if_setup(struct net_device
*dev
)
706 dev
->netdev_ops
= &ieee80211_dataif_ops
;
707 dev
->destructor
= free_netdev
;
710 static void ieee80211_iface_work(struct work_struct
*work
)
712 struct ieee80211_sub_if_data
*sdata
=
713 container_of(work
, struct ieee80211_sub_if_data
, work
);
714 struct ieee80211_local
*local
= sdata
->local
;
716 struct sta_info
*sta
;
717 struct ieee80211_ra_tid
*ra_tid
;
719 if (!ieee80211_sdata_running(sdata
))
726 * ieee80211_queue_work() should have picked up most cases,
727 * here we'll pick the rest.
729 if (WARN(local
->suspended
,
730 "interface work scheduled while going to suspend\n"))
733 /* first process frames */
734 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
735 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
737 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
738 ra_tid
= (void *)&skb
->cb
;
739 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
741 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
742 ra_tid
= (void *)&skb
->cb
;
743 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
745 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
746 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
749 mutex_lock(&local
->sta_mtx
);
750 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
752 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
753 case WLAN_ACTION_ADDBA_REQ
:
754 ieee80211_process_addba_request(
755 local
, sta
, mgmt
, len
);
757 case WLAN_ACTION_ADDBA_RESP
:
758 ieee80211_process_addba_resp(local
, sta
,
761 case WLAN_ACTION_DELBA
:
762 ieee80211_process_delba(sdata
, sta
,
770 mutex_unlock(&local
->sta_mtx
);
771 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
772 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
774 * So the frame isn't mgmt, but frame_control
775 * is at the right place anyway, of course, so
776 * the if statement is correct.
778 * Warn if we have other data frame types here,
779 * they must not get here.
781 WARN_ON(hdr
->frame_control
&
782 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
783 WARN_ON(!(hdr
->seq_ctrl
&
784 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
786 * This was a fragment of a frame, received while
787 * a block-ack session was active. That cannot be
788 * right, so terminate the session.
790 mutex_lock(&local
->sta_mtx
);
791 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
793 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
794 IEEE80211_QOS_CTL_TID_MASK
;
796 __ieee80211_stop_rx_ba_session(
797 sta
, tid
, WLAN_BACK_RECIPIENT
,
798 WLAN_REASON_QSTA_REQUIRE_SETUP
);
800 mutex_unlock(&local
->sta_mtx
);
801 } else switch (sdata
->vif
.type
) {
802 case NL80211_IFTYPE_STATION
:
803 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
805 case NL80211_IFTYPE_ADHOC
:
806 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
808 case NL80211_IFTYPE_MESH_POINT
:
809 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
811 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
814 WARN(1, "frame for unexpected interface type");
821 /* then other type-dependent work */
822 switch (sdata
->vif
.type
) {
823 case NL80211_IFTYPE_STATION
:
824 ieee80211_sta_work(sdata
);
826 case NL80211_IFTYPE_ADHOC
:
827 ieee80211_ibss_work(sdata
);
829 case NL80211_IFTYPE_MESH_POINT
:
830 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
832 ieee80211_mesh_work(sdata
);
841 * Helper function to initialise an interface to a specific type.
843 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
844 enum nl80211_iftype type
)
846 /* clear type-dependent union */
847 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
849 /* and set some type-dependent values */
850 sdata
->vif
.type
= type
;
851 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
852 sdata
->wdev
.iftype
= type
;
854 /* only monitor differs */
855 sdata
->dev
->type
= ARPHRD_ETHER
;
857 skb_queue_head_init(&sdata
->skb_queue
);
858 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
861 case NL80211_IFTYPE_AP
:
862 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
863 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
865 case NL80211_IFTYPE_STATION
:
866 ieee80211_sta_setup_sdata(sdata
);
868 case NL80211_IFTYPE_ADHOC
:
869 ieee80211_ibss_setup_sdata(sdata
);
871 case NL80211_IFTYPE_MESH_POINT
:
872 if (ieee80211_vif_is_mesh(&sdata
->vif
))
873 ieee80211_mesh_init_sdata(sdata
);
875 case NL80211_IFTYPE_MONITOR
:
876 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
877 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
878 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
879 MONITOR_FLAG_OTHER_BSS
;
881 case NL80211_IFTYPE_WDS
:
882 case NL80211_IFTYPE_AP_VLAN
:
884 case NL80211_IFTYPE_UNSPECIFIED
:
885 case __NL80211_IFTYPE_AFTER_LAST
:
890 ieee80211_debugfs_add_netdev(sdata
);
893 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
894 enum nl80211_iftype type
)
898 if (type
== sdata
->vif
.type
)
901 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
902 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
903 type
== NL80211_IFTYPE_ADHOC
)
907 * We could, here, on changes between IBSS/STA/MESH modes,
908 * invoke an MLME function instead that disassociates etc.
909 * and goes into the requested mode.
912 if (ieee80211_sdata_running(sdata
))
915 /* Purge and reset type-dependent state. */
916 ieee80211_teardown_sdata(sdata
->dev
);
917 ieee80211_setup_sdata(sdata
, type
);
919 /* reset some values that shouldn't be kept across type changes */
920 sdata
->vif
.bss_conf
.basic_rates
=
921 ieee80211_mandatory_rates(sdata
->local
,
922 sdata
->local
->hw
.conf
.channel
->band
);
923 sdata
->drop_unencrypted
= 0;
924 if (type
== NL80211_IFTYPE_STATION
)
925 sdata
->u
.mgd
.use_4addr
= false;
930 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
931 struct net_device
*dev
,
932 enum nl80211_iftype type
)
934 struct ieee80211_sub_if_data
*sdata
;
935 u64 mask
, start
, addr
, val
, inc
;
937 u8 tmp_addr
[ETH_ALEN
];
940 /* default ... something at least */
941 memcpy(dev
->perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
943 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
944 local
->hw
.wiphy
->n_addresses
<= 1)
948 mutex_lock(&local
->iflist_mtx
);
951 case NL80211_IFTYPE_MONITOR
:
954 case NL80211_IFTYPE_WDS
:
955 case NL80211_IFTYPE_AP_VLAN
:
956 /* match up with an AP interface */
957 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
958 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
960 memcpy(dev
->perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
963 /* keep default if no AP interface present */
966 /* assign a new address if possible -- try n_addresses first */
967 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
970 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
971 if (memcmp(local
->hw
.wiphy
->addresses
[i
].addr
,
972 sdata
->vif
.addr
, ETH_ALEN
) == 0) {
979 memcpy(dev
->perm_addr
,
980 local
->hw
.wiphy
->addresses
[i
].addr
,
986 /* try mask if available */
987 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
990 m
= local
->hw
.wiphy
->addr_mask
;
991 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
992 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
993 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
995 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
996 /* not a contiguous mask ... not handled now! */
997 printk(KERN_DEBUG
"not contiguous\n");
1001 m
= local
->hw
.wiphy
->perm_addr
;
1002 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1003 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1004 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1006 inc
= 1ULL<<__ffs64(mask
);
1007 val
= (start
& mask
);
1008 addr
= (start
& ~mask
) | (val
& mask
);
1012 tmp_addr
[5] = addr
>> 0*8;
1013 tmp_addr
[4] = addr
>> 1*8;
1014 tmp_addr
[3] = addr
>> 2*8;
1015 tmp_addr
[2] = addr
>> 3*8;
1016 tmp_addr
[1] = addr
>> 4*8;
1017 tmp_addr
[0] = addr
>> 5*8;
1021 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1022 if (memcmp(tmp_addr
, sdata
->vif
.addr
,
1030 memcpy(dev
->perm_addr
, tmp_addr
, ETH_ALEN
);
1033 addr
= (start
& ~mask
) | (val
& mask
);
1034 } while (addr
!= start
);
1039 mutex_unlock(&local
->iflist_mtx
);
1042 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1043 struct net_device
**new_dev
, enum nl80211_iftype type
,
1044 struct vif_params
*params
)
1046 struct net_device
*ndev
;
1047 struct ieee80211_sub_if_data
*sdata
= NULL
;
1052 ndev
= alloc_netdev_mq(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1053 name
, ieee80211_if_setup
, local
->hw
.queues
);
1056 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1058 ndev
->needed_headroom
= local
->tx_headroom
+
1059 4*6 /* four MAC addresses */
1060 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1062 + 8 /* rfc1042/bridge tunnel */
1063 - ETH_HLEN
/* ethernet hard_header_len */
1064 + IEEE80211_ENCRYPT_HEADROOM
;
1065 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1067 ret
= dev_alloc_name(ndev
, ndev
->name
);
1071 ieee80211_assign_perm_addr(local
, ndev
, type
);
1072 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1073 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1075 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1076 sdata
= netdev_priv(ndev
);
1077 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1078 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1079 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1081 /* initialise type-independent data */
1082 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1083 sdata
->local
= local
;
1086 sdata
->arp_filter_state
= true;
1089 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1090 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1092 INIT_LIST_HEAD(&sdata
->key_list
);
1094 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1095 struct ieee80211_supported_band
*sband
;
1096 sband
= local
->hw
.wiphy
->bands
[i
];
1097 sdata
->rc_rateidx_mask
[i
] =
1098 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1101 /* setup type-dependent data */
1102 ieee80211_setup_sdata(sdata
, type
);
1105 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1106 if (type
== NL80211_IFTYPE_STATION
)
1107 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1110 ret
= register_netdevice(ndev
);
1114 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
1115 params
&& params
->mesh_id_len
)
1116 ieee80211_sdata_set_mesh_id(sdata
,
1117 params
->mesh_id_len
,
1120 mutex_lock(&local
->iflist_mtx
);
1121 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1122 mutex_unlock(&local
->iflist_mtx
);
1134 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1138 mutex_lock(&sdata
->local
->iflist_mtx
);
1139 list_del_rcu(&sdata
->list
);
1140 mutex_unlock(&sdata
->local
->iflist_mtx
);
1143 unregister_netdevice(sdata
->dev
);
1147 * Remove all interfaces, may only be called at hardware unregistration
1148 * time because it doesn't do RCU-safe list removals.
1150 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1152 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1153 LIST_HEAD(unreg_list
);
1157 mutex_lock(&local
->iflist_mtx
);
1158 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1159 list_del(&sdata
->list
);
1161 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1163 mutex_unlock(&local
->iflist_mtx
);
1164 unregister_netdevice_many(&unreg_list
);
1167 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
1170 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
1173 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1174 printk(KERN_DEBUG
"%s: device no longer idle - %s\n",
1175 wiphy_name(local
->hw
.wiphy
), reason
);
1178 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
1179 return IEEE80211_CONF_CHANGE_IDLE
;
1182 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
1184 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
1187 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1188 printk(KERN_DEBUG
"%s: device now idle\n",
1189 wiphy_name(local
->hw
.wiphy
));
1192 drv_flush(local
, false);
1194 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
1195 return IEEE80211_CONF_CHANGE_IDLE
;
1198 u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
1200 struct ieee80211_sub_if_data
*sdata
;
1203 if (!list_empty(&local
->work_list
))
1204 return ieee80211_idle_off(local
, "working");
1206 if (local
->scanning
)
1207 return ieee80211_idle_off(local
, "scanning");
1209 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1210 if (!ieee80211_sdata_running(sdata
))
1212 /* do not count disabled managed interfaces */
1213 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1214 !sdata
->u
.mgd
.associated
)
1216 /* do not count unused IBSS interfaces */
1217 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
1218 !sdata
->u
.ibss
.ssid_len
)
1220 /* count everything else */
1225 return ieee80211_idle_on(local
);
1227 return ieee80211_idle_off(local
, "in use");
1232 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
1236 mutex_lock(&local
->iflist_mtx
);
1237 chg
= __ieee80211_recalc_idle(local
);
1238 mutex_unlock(&local
->iflist_mtx
);
1240 ieee80211_hw_config(local
, chg
);
1243 static int netdev_notify(struct notifier_block
*nb
,
1244 unsigned long state
,
1247 struct net_device
*dev
= ndev
;
1248 struct ieee80211_sub_if_data
*sdata
;
1250 if (state
!= NETDEV_CHANGENAME
)
1253 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1256 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1259 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1261 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1263 ieee80211_debugfs_rename_netdev(sdata
);
1267 static struct notifier_block mac80211_netdev_notifier
= {
1268 .notifier_call
= netdev_notify
,
1271 int ieee80211_iface_init(void)
1273 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1276 void ieee80211_iface_exit(void)
1278 unregister_netdevice_notifier(&mac80211_netdev_notifier
);