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;
191 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
193 /* we hold the RTNL here so can safely walk the list */
194 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
195 struct net_device
*ndev
= nsdata
->dev
;
197 if (ndev
!= dev
&& netif_running(ndev
)) {
199 * Allow only a single IBSS interface to be up at any
200 * time. This is restricted because beacon distribution
201 * cannot work properly if both are in the same IBSS.
203 * To remove this restriction we'd have to disallow them
204 * from setting the same SSID on different IBSS interfaces
205 * belonging to the same hardware. Then, however, we're
206 * faced with having to adopt two different TSF timers...
208 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
&&
209 nsdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
)
213 * The remaining checks are only performed for interfaces
214 * with the same MAC address.
216 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
220 * check whether it may have the same address
222 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
227 * can only add VLANs to enabled APs
229 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_VLAN
&&
230 nsdata
->vif
.type
== IEEE80211_IF_TYPE_AP
)
231 sdata
->bss
= &nsdata
->u
.ap
;
235 switch (sdata
->vif
.type
) {
236 case IEEE80211_IF_TYPE_WDS
:
237 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
240 case IEEE80211_IF_TYPE_VLAN
:
243 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
245 case IEEE80211_IF_TYPE_AP
:
246 sdata
->bss
= &sdata
->u
.ap
;
248 case IEEE80211_IF_TYPE_MESH_POINT
:
249 /* mesh ifaces must set allmulti to forward mcast traffic */
250 atomic_inc(&local
->iff_allmultis
);
252 case IEEE80211_IF_TYPE_STA
:
253 case IEEE80211_IF_TYPE_MNTR
:
254 case IEEE80211_IF_TYPE_IBSS
:
255 /* no special treatment */
257 case IEEE80211_IF_TYPE_INVALID
:
263 if (local
->open_count
== 0) {
265 if (local
->ops
->start
)
266 res
= local
->ops
->start(local_to_hw(local
));
269 need_hw_reconfig
= 1;
270 ieee80211_led_radio(local
, local
->hw
.conf
.radio_enabled
);
273 switch (sdata
->vif
.type
) {
274 case IEEE80211_IF_TYPE_VLAN
:
275 /* no need to tell driver */
277 case IEEE80211_IF_TYPE_MNTR
:
278 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
279 local
->cooked_mntrs
++;
283 /* must be before the call to ieee80211_configure_filter */
285 if (local
->monitors
== 1)
286 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
288 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
289 local
->fif_fcsfail
++;
290 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
291 local
->fif_plcpfail
++;
292 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
293 local
->fif_control
++;
294 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
295 local
->fif_other_bss
++;
297 netif_addr_lock_bh(local
->mdev
);
298 ieee80211_configure_filter(local
);
299 netif_addr_unlock_bh(local
->mdev
);
301 case IEEE80211_IF_TYPE_STA
:
302 case IEEE80211_IF_TYPE_IBSS
:
303 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
306 conf
.vif
= &sdata
->vif
;
307 conf
.type
= sdata
->vif
.type
;
308 conf
.mac_addr
= dev
->dev_addr
;
309 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
313 if (ieee80211_vif_is_mesh(&sdata
->vif
))
314 ieee80211_start_mesh(sdata
->dev
);
315 changed
|= ieee80211_reset_erp_info(dev
);
316 ieee80211_bss_info_change_notify(sdata
, changed
);
317 ieee80211_enable_keys(sdata
);
319 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
&&
320 !(sdata
->flags
& IEEE80211_SDATA_USERSPACE_MLME
))
321 netif_carrier_off(dev
);
323 netif_carrier_on(dev
);
326 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_WDS
) {
327 /* Create STA entry for the WDS peer */
328 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
332 goto err_del_interface
;
335 /* no locking required since STA is not live yet */
336 sta
->flags
|= WLAN_STA_AUTHORIZED
;
338 res
= sta_info_insert(sta
);
340 /* STA has been freed */
341 goto err_del_interface
;
345 if (local
->open_count
== 0) {
346 res
= dev_open(local
->mdev
);
349 goto err_del_interface
;
350 tasklet_enable(&local
->tx_pending_tasklet
);
351 tasklet_enable(&local
->tasklet
);
355 * set_multicast_list will be invoked by the networking core
356 * which will check whether any increments here were done in
357 * error and sync them down to the hardware as filter flags.
359 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
360 atomic_inc(&local
->iff_allmultis
);
362 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
363 atomic_inc(&local
->iff_promiscs
);
366 if (need_hw_reconfig
)
367 ieee80211_hw_config(local
);
370 * ieee80211_sta_work is disabled while network interface
371 * is down. Therefore, some configuration changes may not
372 * yet be effective. Trigger execution of ieee80211_sta_work
375 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
376 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
377 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
378 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
381 netif_tx_start_all_queues(dev
);
385 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
387 if (!local
->open_count
&& local
->ops
->stop
)
388 local
->ops
->stop(local_to_hw(local
));
391 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_VLAN
)
392 list_del(&sdata
->u
.vlan
.list
);
396 static int ieee80211_stop(struct net_device
*dev
)
398 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
399 struct ieee80211_local
*local
= sdata
->local
;
400 struct ieee80211_if_init_conf conf
;
401 struct sta_info
*sta
;
404 * Stop TX on this interface first.
406 netif_tx_stop_all_queues(dev
);
409 * Now delete all active aggregation sessions.
413 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
414 if (sta
->sdata
== sdata
)
415 ieee80211_sta_tear_down_BA_sessions(dev
, sta
->addr
);
421 * Remove all stations associated with this interface.
423 * This must be done before calling ops->remove_interface()
424 * because otherwise we can later invoke ops->sta_notify()
425 * whenever the STAs are removed, and that invalidates driver
426 * assumptions about always getting a vif pointer that is valid
427 * (because if we remove a STA after ops->remove_interface()
428 * the driver will have removed the vif info already!)
430 * We could relax this and only unlink the stations from the
431 * hash table and list but keep them on a per-sdata list that
432 * will be inserted back again when the interface is brought
433 * up again, but I don't currently see a use case for that,
434 * except with WDS which gets a STA entry created when it is
437 sta_info_flush(local
, sdata
);
440 * Don't count this interface for promisc/allmulti while it
441 * is down. dev_mc_unsync() will invoke set_multicast_list
442 * on the master interface which will sync these down to the
443 * hardware as filter flags.
445 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
446 atomic_dec(&local
->iff_allmultis
);
448 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
449 atomic_dec(&local
->iff_promiscs
);
451 dev_mc_unsync(local
->mdev
, dev
);
453 /* APs need special treatment */
454 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
455 struct ieee80211_sub_if_data
*vlan
, *tmp
;
456 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
459 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
463 /* down all dependent devices, that is VLANs */
464 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
466 dev_close(vlan
->dev
);
467 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
472 switch (sdata
->vif
.type
) {
473 case IEEE80211_IF_TYPE_VLAN
:
474 list_del(&sdata
->u
.vlan
.list
);
475 /* no need to tell driver */
477 case IEEE80211_IF_TYPE_MNTR
:
478 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
479 local
->cooked_mntrs
--;
484 if (local
->monitors
== 0)
485 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
487 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
488 local
->fif_fcsfail
--;
489 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
490 local
->fif_plcpfail
--;
491 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
492 local
->fif_control
--;
493 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
494 local
->fif_other_bss
--;
496 netif_addr_lock_bh(local
->mdev
);
497 ieee80211_configure_filter(local
);
498 netif_addr_unlock_bh(local
->mdev
);
500 case IEEE80211_IF_TYPE_MESH_POINT
:
501 /* allmulti is always set on mesh ifaces */
502 atomic_dec(&local
->iff_allmultis
);
504 case IEEE80211_IF_TYPE_STA
:
505 case IEEE80211_IF_TYPE_IBSS
:
506 sdata
->u
.sta
.state
= IEEE80211_DISABLED
;
507 memset(sdata
->u
.sta
.bssid
, 0, ETH_ALEN
);
508 del_timer_sync(&sdata
->u
.sta
.timer
);
510 * When we get here, the interface is marked down.
511 * Call synchronize_rcu() to wait for the RX path
512 * should it be using the interface and enqueuing
513 * frames at this very time on another CPU.
516 skb_queue_purge(&sdata
->u
.sta
.skb_queue
);
518 if (local
->scan_dev
== sdata
->dev
) {
519 if (!local
->ops
->hw_scan
) {
520 local
->sta_sw_scanning
= 0;
521 cancel_delayed_work(&local
->scan_work
);
523 local
->sta_hw_scanning
= 0;
526 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PRIVACY_INVOKED
;
527 kfree(sdata
->u
.sta
.extra_ie
);
528 sdata
->u
.sta
.extra_ie
= NULL
;
529 sdata
->u
.sta
.extra_ie_len
= 0;
532 conf
.vif
= &sdata
->vif
;
533 conf
.type
= sdata
->vif
.type
;
534 conf
.mac_addr
= dev
->dev_addr
;
535 /* disable all keys for as long as this netdev is down */
536 ieee80211_disable_keys(sdata
);
537 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
542 if (local
->open_count
== 0) {
543 if (netif_running(local
->mdev
))
544 dev_close(local
->mdev
);
546 if (local
->ops
->stop
)
547 local
->ops
->stop(local_to_hw(local
));
549 ieee80211_led_radio(local
, 0);
551 flush_workqueue(local
->hw
.workqueue
);
553 tasklet_disable(&local
->tx_pending_tasklet
);
554 tasklet_disable(&local
->tasklet
);
560 int ieee80211_start_tx_ba_session(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
562 struct ieee80211_local
*local
= hw_to_local(hw
);
563 struct sta_info
*sta
;
564 struct ieee80211_sub_if_data
*sdata
;
565 u16 start_seq_num
= 0;
568 DECLARE_MAC_BUF(mac
);
570 if (tid
>= STA_TID_NUM
)
573 #ifdef CONFIG_MAC80211_HT_DEBUG
574 printk(KERN_DEBUG
"Open BA session requested for %s tid %u\n",
575 print_mac(mac
, ra
), tid
);
576 #endif /* CONFIG_MAC80211_HT_DEBUG */
580 sta
= sta_info_get(local
, ra
);
582 #ifdef CONFIG_MAC80211_HT_DEBUG
583 printk(KERN_DEBUG
"Could not find the station\n");
589 spin_lock_bh(&sta
->lock
);
591 /* we have tried too many times, receiver does not want A-MPDU */
592 if (sta
->ampdu_mlme
.addba_req_num
[tid
] > HT_AGG_MAX_RETRIES
) {
597 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
598 /* check if the TID is not in aggregation flow already */
599 if (*state
!= HT_AGG_STATE_IDLE
) {
600 #ifdef CONFIG_MAC80211_HT_DEBUG
601 printk(KERN_DEBUG
"BA request denied - session is not "
602 "idle on tid %u\n", tid
);
603 #endif /* CONFIG_MAC80211_HT_DEBUG */
608 /* prepare A-MPDU MLME for Tx aggregation */
609 sta
->ampdu_mlme
.tid_tx
[tid
] =
610 kmalloc(sizeof(struct tid_ampdu_tx
), GFP_ATOMIC
);
611 if (!sta
->ampdu_mlme
.tid_tx
[tid
]) {
612 #ifdef CONFIG_MAC80211_HT_DEBUG
614 printk(KERN_ERR
"allocate tx mlme to tid %d failed\n",
621 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.function
=
622 sta_addba_resp_timer_expired
;
623 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.data
=
624 (unsigned long)&sta
->timer_to_tid
[tid
];
625 init_timer(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
627 /* create a new queue for this aggregation */
628 ret
= ieee80211_ht_agg_queue_add(local
, sta
, tid
);
630 /* case no queue is available to aggregation
631 * don't switch to aggregation */
633 #ifdef CONFIG_MAC80211_HT_DEBUG
634 printk(KERN_DEBUG
"BA request denied - queue unavailable for"
636 #endif /* CONFIG_MAC80211_HT_DEBUG */
637 goto err_unlock_queue
;
641 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
642 * call back right away, it must see that the flow has begun */
643 *state
|= HT_ADDBA_REQUESTED_MSK
;
645 if (local
->ops
->ampdu_action
)
646 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_START
,
647 ra
, tid
, &start_seq_num
);
650 /* No need to requeue the packets in the agg queue, since we
651 * held the tx lock: no packet could be enqueued to the newly
653 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 0);
654 #ifdef CONFIG_MAC80211_HT_DEBUG
655 printk(KERN_DEBUG
"BA request denied - HW unavailable for"
657 #endif /* CONFIG_MAC80211_HT_DEBUG */
658 *state
= HT_AGG_STATE_IDLE
;
659 goto err_unlock_queue
;
662 /* Will put all the packets in the new SW queue */
663 ieee80211_requeue(local
, ieee802_1d_to_ac
[tid
]);
664 spin_unlock_bh(&sta
->lock
);
666 /* send an addBA request */
667 sta
->ampdu_mlme
.dialog_token_allocator
++;
668 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
=
669 sta
->ampdu_mlme
.dialog_token_allocator
;
670 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
= start_seq_num
;
673 ieee80211_send_addba_request(sta
->sdata
->dev
, ra
, tid
,
674 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
,
675 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
,
677 /* activate the timer for the recipient's addBA response */
678 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.expires
=
679 jiffies
+ ADDBA_RESP_INTERVAL
;
680 add_timer(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
681 #ifdef CONFIG_MAC80211_HT_DEBUG
682 printk(KERN_DEBUG
"activated addBA response timer on tid %d\n", tid
);
687 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
688 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
691 spin_unlock_bh(&sta
->lock
);
696 EXPORT_SYMBOL(ieee80211_start_tx_ba_session
);
698 int ieee80211_stop_tx_ba_session(struct ieee80211_hw
*hw
,
700 enum ieee80211_back_parties initiator
)
702 struct ieee80211_local
*local
= hw_to_local(hw
);
703 struct sta_info
*sta
;
706 DECLARE_MAC_BUF(mac
);
708 if (tid
>= STA_TID_NUM
)
712 sta
= sta_info_get(local
, ra
);
718 /* check if the TID is in aggregation */
719 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
720 spin_lock_bh(&sta
->lock
);
722 if (*state
!= HT_AGG_STATE_OPERATIONAL
) {
727 #ifdef CONFIG_MAC80211_HT_DEBUG
728 printk(KERN_DEBUG
"Tx BA session stop requested for %s tid %u\n",
729 print_mac(mac
, ra
), tid
);
730 #endif /* CONFIG_MAC80211_HT_DEBUG */
732 ieee80211_stop_queue(hw
, sta
->tid_to_tx_q
[tid
]);
734 *state
= HT_AGG_STATE_REQ_STOP_BA_MSK
|
735 (initiator
<< HT_AGG_STATE_INITIATOR_SHIFT
);
737 if (local
->ops
->ampdu_action
)
738 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_STOP
,
741 /* case HW denied going back to legacy */
743 WARN_ON(ret
!= -EBUSY
);
744 *state
= HT_AGG_STATE_OPERATIONAL
;
745 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
750 spin_unlock_bh(&sta
->lock
);
754 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session
);
756 void ieee80211_start_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
758 struct ieee80211_local
*local
= hw_to_local(hw
);
759 struct sta_info
*sta
;
761 DECLARE_MAC_BUF(mac
);
763 if (tid
>= STA_TID_NUM
) {
764 #ifdef CONFIG_MAC80211_HT_DEBUG
765 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
772 sta
= sta_info_get(local
, ra
);
775 #ifdef CONFIG_MAC80211_HT_DEBUG
776 printk(KERN_DEBUG
"Could not find station: %s\n",
782 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
783 spin_lock_bh(&sta
->lock
);
785 if (!(*state
& HT_ADDBA_REQUESTED_MSK
)) {
786 #ifdef CONFIG_MAC80211_HT_DEBUG
787 printk(KERN_DEBUG
"addBA was not requested yet, state is %d\n",
790 spin_unlock_bh(&sta
->lock
);
795 WARN_ON_ONCE(*state
& HT_ADDBA_DRV_READY_MSK
);
797 *state
|= HT_ADDBA_DRV_READY_MSK
;
799 if (*state
== HT_AGG_STATE_OPERATIONAL
) {
800 #ifdef CONFIG_MAC80211_HT_DEBUG
801 printk(KERN_DEBUG
"Aggregation is on for tid %d \n", tid
);
803 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
805 spin_unlock_bh(&sta
->lock
);
808 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb
);
810 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u8 tid
)
812 struct ieee80211_local
*local
= hw_to_local(hw
);
813 struct sta_info
*sta
;
816 DECLARE_MAC_BUF(mac
);
818 if (tid
>= STA_TID_NUM
) {
819 #ifdef CONFIG_MAC80211_HT_DEBUG
820 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
826 #ifdef CONFIG_MAC80211_HT_DEBUG
827 printk(KERN_DEBUG
"Stopping Tx BA session for %s tid %d\n",
828 print_mac(mac
, ra
), tid
);
829 #endif /* CONFIG_MAC80211_HT_DEBUG */
832 sta
= sta_info_get(local
, ra
);
834 #ifdef CONFIG_MAC80211_HT_DEBUG
835 printk(KERN_DEBUG
"Could not find station: %s\n",
841 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
843 /* NOTE: no need to use sta->lock in this state check, as
844 * ieee80211_stop_tx_ba_session will let only one stop call to
845 * pass through per sta/tid
847 if ((*state
& HT_AGG_STATE_REQ_STOP_BA_MSK
) == 0) {
848 #ifdef CONFIG_MAC80211_HT_DEBUG
849 printk(KERN_DEBUG
"unexpected callback to A-MPDU stop\n");
855 if (*state
& HT_AGG_STATE_INITIATOR_MSK
)
856 ieee80211_send_delba(sta
->sdata
->dev
, ra
, tid
,
857 WLAN_BACK_INITIATOR
, WLAN_REASON_QSTA_NOT_USE
);
859 agg_queue
= sta
->tid_to_tx_q
[tid
];
861 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 1);
863 /* We just requeued the all the frames that were in the
864 * removed queue, and since we might miss a softirq we do
865 * netif_schedule_queue. ieee80211_wake_queue is not used
866 * here as this queue is not necessarily stopped
868 netif_schedule_queue(netdev_get_tx_queue(local
->mdev
, agg_queue
));
869 spin_lock_bh(&sta
->lock
);
870 *state
= HT_AGG_STATE_IDLE
;
871 sta
->ampdu_mlme
.addba_req_num
[tid
] = 0;
872 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
873 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
874 spin_unlock_bh(&sta
->lock
);
878 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb
);
880 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
881 const u8
*ra
, u16 tid
)
883 struct ieee80211_local
*local
= hw_to_local(hw
);
884 struct ieee80211_ra_tid
*ra_tid
;
885 struct sk_buff
*skb
= dev_alloc_skb(0);
887 if (unlikely(!skb
)) {
888 #ifdef CONFIG_MAC80211_HT_DEBUG
890 printk(KERN_WARNING
"%s: Not enough memory, "
891 "dropping start BA session", skb
->dev
->name
);
895 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
896 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
899 skb
->pkt_type
= IEEE80211_ADDBA_MSG
;
900 skb_queue_tail(&local
->skb_queue
, skb
);
901 tasklet_schedule(&local
->tasklet
);
903 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe
);
905 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
906 const u8
*ra
, u16 tid
)
908 struct ieee80211_local
*local
= hw_to_local(hw
);
909 struct ieee80211_ra_tid
*ra_tid
;
910 struct sk_buff
*skb
= dev_alloc_skb(0);
912 if (unlikely(!skb
)) {
913 #ifdef CONFIG_MAC80211_HT_DEBUG
915 printk(KERN_WARNING
"%s: Not enough memory, "
916 "dropping stop BA session", skb
->dev
->name
);
920 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
921 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
924 skb
->pkt_type
= IEEE80211_DELBA_MSG
;
925 skb_queue_tail(&local
->skb_queue
, skb
);
926 tasklet_schedule(&local
->tasklet
);
928 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe
);
930 static void ieee80211_set_multicast_list(struct net_device
*dev
)
932 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
933 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
934 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
936 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
937 promisc
= !!(dev
->flags
& IFF_PROMISC
);
938 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
939 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
941 if (allmulti
!= sdata_allmulti
) {
942 if (dev
->flags
& IFF_ALLMULTI
)
943 atomic_inc(&local
->iff_allmultis
);
945 atomic_dec(&local
->iff_allmultis
);
946 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
949 if (promisc
!= sdata_promisc
) {
950 if (dev
->flags
& IFF_PROMISC
)
951 atomic_inc(&local
->iff_promiscs
);
953 atomic_dec(&local
->iff_promiscs
);
954 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
957 dev_mc_sync(local
->mdev
, dev
);
960 static const struct header_ops ieee80211_header_ops
= {
961 .create
= eth_header
,
962 .parse
= header_parse_80211
,
963 .rebuild
= eth_rebuild_header
,
964 .cache
= eth_header_cache
,
965 .cache_update
= eth_header_cache_update
,
968 void ieee80211_if_setup(struct net_device
*dev
)
971 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
972 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
973 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
974 dev
->change_mtu
= ieee80211_change_mtu
;
975 dev
->open
= ieee80211_open
;
976 dev
->stop
= ieee80211_stop
;
977 dev
->destructor
= free_netdev
;
980 /* everything else */
982 int ieee80211_if_config(struct ieee80211_sub_if_data
*sdata
, u32 changed
)
984 struct ieee80211_local
*local
= sdata
->local
;
985 struct ieee80211_if_conf conf
;
987 if (WARN_ON(!netif_running(sdata
->dev
)))
990 if (!local
->ops
->config_interface
)
993 memset(&conf
, 0, sizeof(conf
));
994 conf
.changed
= changed
;
996 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
997 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
998 conf
.bssid
= sdata
->u
.sta
.bssid
;
999 conf
.ssid
= sdata
->u
.sta
.ssid
;
1000 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
1001 } else if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
1002 conf
.bssid
= sdata
->dev
->dev_addr
;
1003 conf
.ssid
= sdata
->u
.ap
.ssid
;
1004 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
1005 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1006 u8 zero
[ETH_ALEN
] = { 0 };
1015 if (WARN_ON(!conf
.bssid
&& (changed
& IEEE80211_IFCC_BSSID
)))
1018 if (WARN_ON(!conf
.ssid
&& (changed
& IEEE80211_IFCC_SSID
)))
1021 return local
->ops
->config_interface(local_to_hw(local
),
1022 &sdata
->vif
, &conf
);
1025 int ieee80211_hw_config(struct ieee80211_local
*local
)
1027 struct ieee80211_channel
*chan
;
1030 if (local
->sta_sw_scanning
)
1031 chan
= local
->scan_channel
;
1033 chan
= local
->oper_channel
;
1035 local
->hw
.conf
.channel
= chan
;
1037 if (!local
->hw
.conf
.power_level
)
1038 local
->hw
.conf
.power_level
= chan
->max_power
;
1040 local
->hw
.conf
.power_level
= min(chan
->max_power
,
1041 local
->hw
.conf
.power_level
);
1043 local
->hw
.conf
.max_antenna_gain
= chan
->max_antenna_gain
;
1045 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1046 printk(KERN_DEBUG
"%s: HW CONFIG: freq=%d\n",
1047 wiphy_name(local
->hw
.wiphy
), chan
->center_freq
);
1050 if (local
->open_count
)
1051 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
1057 * ieee80211_handle_ht should be used only after legacy configuration
1058 * has been determined namely band, as ht configuration depends upon
1059 * the hardware's HT abilities for a _specific_ band.
1061 u32
ieee80211_handle_ht(struct ieee80211_local
*local
, int enable_ht
,
1062 struct ieee80211_ht_info
*req_ht_cap
,
1063 struct ieee80211_ht_bss_info
*req_bss_cap
)
1065 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1066 struct ieee80211_supported_band
*sband
;
1067 struct ieee80211_ht_info ht_conf
;
1068 struct ieee80211_ht_bss_info ht_bss_conf
;
1071 u8 max_tx_streams
= IEEE80211_HT_CAP_MAX_STREAMS
;
1074 sband
= local
->hw
.wiphy
->bands
[conf
->channel
->band
];
1076 memset(&ht_conf
, 0, sizeof(struct ieee80211_ht_info
));
1077 memset(&ht_bss_conf
, 0, sizeof(struct ieee80211_ht_bss_info
));
1079 /* HT is not supported */
1080 if (!sband
->ht_info
.ht_supported
) {
1081 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1087 if (conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
)
1088 changed
|= BSS_CHANGED_HT
;
1089 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1090 conf
->ht_conf
.ht_supported
= 0;
1095 if (!(conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
))
1096 changed
|= BSS_CHANGED_HT
;
1098 conf
->flags
|= IEEE80211_CONF_SUPPORT_HT_MODE
;
1099 ht_conf
.ht_supported
= 1;
1101 ht_conf
.cap
= req_ht_cap
->cap
& sband
->ht_info
.cap
;
1102 ht_conf
.cap
&= ~(IEEE80211_HT_CAP_MIMO_PS
);
1103 ht_conf
.cap
|= sband
->ht_info
.cap
& IEEE80211_HT_CAP_MIMO_PS
;
1104 ht_bss_conf
.primary_channel
= req_bss_cap
->primary_channel
;
1105 ht_bss_conf
.bss_cap
= req_bss_cap
->bss_cap
;
1106 ht_bss_conf
.bss_op_mode
= req_bss_cap
->bss_op_mode
;
1108 ht_conf
.ampdu_factor
= req_ht_cap
->ampdu_factor
;
1109 ht_conf
.ampdu_density
= req_ht_cap
->ampdu_density
;
1112 tx_mcs_set_cap
= sband
->ht_info
.supp_mcs_set
[12];
1114 /* configure suppoerted Tx MCS according to requested MCS
1115 * (based in most cases on Rx capabilities of peer) and self
1116 * Tx MCS capabilities (as defined by low level driver HW
1117 * Tx capabilities) */
1118 if (!(tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_DEFINED
))
1121 /* Counting from 0 therfore + 1 */
1122 if (tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_RX_DIFF
)
1123 max_tx_streams
= ((tx_mcs_set_cap
&
1124 IEEE80211_HT_CAP_MCS_TX_STREAMS
) >> 2) + 1;
1126 for (i
= 0; i
< max_tx_streams
; i
++)
1127 ht_conf
.supp_mcs_set
[i
] =
1128 sband
->ht_info
.supp_mcs_set
[i
] &
1129 req_ht_cap
->supp_mcs_set
[i
];
1131 if (tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_UEQM
)
1132 for (i
= IEEE80211_SUPP_MCS_SET_UEQM
;
1133 i
< IEEE80211_SUPP_MCS_SET_LEN
; i
++)
1134 ht_conf
.supp_mcs_set
[i
] =
1135 sband
->ht_info
.supp_mcs_set
[i
] &
1136 req_ht_cap
->supp_mcs_set
[i
];
1139 /* if bss configuration changed store the new one */
1140 if (memcmp(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
)) ||
1141 memcmp(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
))) {
1142 changed
|= BSS_CHANGED_HT
;
1143 memcpy(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
));
1144 memcpy(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
));
1150 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
1153 struct ieee80211_local
*local
= sdata
->local
;
1158 if (local
->ops
->bss_info_changed
)
1159 local
->ops
->bss_info_changed(local_to_hw(local
),
1165 u32
ieee80211_reset_erp_info(struct net_device
*dev
)
1167 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1169 sdata
->bss_conf
.use_cts_prot
= 0;
1170 sdata
->bss_conf
.use_short_preamble
= 0;
1171 return BSS_CHANGED_ERP_CTS_PROT
| BSS_CHANGED_ERP_PREAMBLE
;
1174 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
1175 struct sk_buff
*skb
)
1177 struct ieee80211_local
*local
= hw_to_local(hw
);
1178 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1181 skb
->dev
= local
->mdev
;
1182 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
1183 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
1184 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
1185 tmp
= skb_queue_len(&local
->skb_queue
) +
1186 skb_queue_len(&local
->skb_queue_unreliable
);
1187 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
1188 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1189 dev_kfree_skb_irq(skb
);
1191 I802_DEBUG_INC(local
->tx_status_drop
);
1193 tasklet_schedule(&local
->tasklet
);
1195 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
1197 static void ieee80211_tasklet_handler(unsigned long data
)
1199 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
1200 struct sk_buff
*skb
;
1201 struct ieee80211_rx_status rx_status
;
1202 struct ieee80211_ra_tid
*ra_tid
;
1204 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
1205 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1206 switch (skb
->pkt_type
) {
1207 case IEEE80211_RX_MSG
:
1208 /* status is in skb->cb */
1209 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
1210 /* Clear skb->pkt_type in order to not confuse kernel
1213 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
1215 case IEEE80211_TX_STATUS_MSG
:
1217 ieee80211_tx_status(local_to_hw(local
), skb
);
1219 case IEEE80211_DELBA_MSG
:
1220 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1221 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
1222 ra_tid
->ra
, ra_tid
->tid
);
1225 case IEEE80211_ADDBA_MSG
:
1226 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1227 ieee80211_start_tx_ba_cb(local_to_hw(local
),
1228 ra_tid
->ra
, ra_tid
->tid
);
1239 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1240 * make a prepared TX frame (one that has been given to hw) to look like brand
1241 * new IEEE 802.11 frame that is ready to go through TX processing again.
1243 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
1244 struct ieee80211_key
*key
,
1245 struct sk_buff
*skb
)
1247 int hdrlen
, iv_len
, mic_len
;
1249 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1254 switch (key
->conf
.alg
) {
1256 iv_len
= WEP_IV_LEN
;
1257 mic_len
= WEP_ICV_LEN
;
1260 iv_len
= TKIP_IV_LEN
;
1261 mic_len
= TKIP_ICV_LEN
;
1264 iv_len
= CCMP_HDR_LEN
;
1265 mic_len
= CCMP_MIC_LEN
;
1271 if (skb
->len
>= mic_len
&&
1272 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
1273 skb_trim(skb
, skb
->len
- mic_len
);
1274 if (skb
->len
>= iv_len
&& skb
->len
> hdrlen
) {
1275 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
1276 skb_pull(skb
, iv_len
);
1281 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1282 u16 fc
= le16_to_cpu(hdr
->frame_control
);
1283 if ((fc
& 0x8C) == 0x88) /* QoS Control Field */ {
1284 fc
&= ~IEEE80211_STYPE_QOS_DATA
;
1285 hdr
->frame_control
= cpu_to_le16(fc
);
1286 memmove(skb
->data
+ 2, skb
->data
, hdrlen
- 2);
1292 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
1293 struct sta_info
*sta
,
1294 struct sk_buff
*skb
)
1296 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1298 sta
->tx_filtered_count
++;
1301 * Clear the TX filter mask for this STA when sending the next
1302 * packet. If the STA went to power save mode, this will happen
1303 * when it wakes up for the next time.
1305 set_sta_flags(sta
, WLAN_STA_CLEAR_PS_FILT
);
1308 * This code races in the following way:
1310 * (1) STA sends frame indicating it will go to sleep and does so
1311 * (2) hardware/firmware adds STA to filter list, passes frame up
1312 * (3) hardware/firmware processes TX fifo and suppresses a frame
1313 * (4) we get TX status before having processed the frame and
1314 * knowing that the STA has gone to sleep.
1316 * This is actually quite unlikely even when both those events are
1317 * processed from interrupts coming in quickly after one another or
1318 * even at the same time because we queue both TX status events and
1319 * RX frames to be processed by a tasklet and process them in the
1320 * same order that they were received or TX status last. Hence, there
1321 * is no race as long as the frame RX is processed before the next TX
1322 * status, which drivers can ensure, see below.
1324 * Note that this can only happen if the hardware or firmware can
1325 * actually add STAs to the filter list, if this is done by the
1326 * driver in response to set_tim() (which will only reduce the race
1327 * this whole filtering tries to solve, not completely solve it)
1328 * this situation cannot happen.
1330 * To completely solve this race drivers need to make sure that they
1331 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1333 * (b) always process RX events before TX status events if ordering
1334 * can be unknown, for example with different interrupt status
1337 if (test_sta_flags(sta
, WLAN_STA_PS
) &&
1338 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
1339 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
1340 skb_queue_tail(&sta
->tx_filtered
, skb
);
1344 if (!test_sta_flags(sta
, WLAN_STA_PS
) &&
1345 !(info
->flags
& IEEE80211_TX_CTL_REQUEUE
)) {
1346 /* Software retry the packet once */
1347 info
->flags
|= IEEE80211_TX_CTL_REQUEUE
;
1348 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
1349 dev_queue_xmit(skb
);
1353 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1354 if (net_ratelimit())
1355 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
1356 "queue_len=%d PS=%d @%lu\n",
1357 wiphy_name(local
->hw
.wiphy
),
1358 skb_queue_len(&sta
->tx_filtered
),
1359 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
1364 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
1366 struct sk_buff
*skb2
;
1367 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1368 struct ieee80211_local
*local
= hw_to_local(hw
);
1369 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1372 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
1373 struct ieee80211_sub_if_data
*sdata
;
1374 struct net_device
*prev_dev
= NULL
;
1375 struct sta_info
*sta
;
1379 if (info
->status
.excessive_retries
) {
1380 sta
= sta_info_get(local
, hdr
->addr1
);
1382 if (test_sta_flags(sta
, WLAN_STA_PS
)) {
1384 * The STA is in power save mode, so assume
1385 * that this TX packet failed because of that.
1387 ieee80211_handle_filtered_frame(local
, sta
, skb
);
1394 fc
= hdr
->frame_control
;
1396 if ((info
->flags
& IEEE80211_TX_STAT_AMPDU_NO_BACK
) &&
1397 (ieee80211_is_data_qos(fc
))) {
1400 sta
= sta_info_get(local
, hdr
->addr1
);
1402 qc
= ieee80211_get_qos_ctl(hdr
);
1404 ssn
= ((le16_to_cpu(hdr
->seq_ctrl
) + 0x10)
1405 & IEEE80211_SCTL_SEQ
);
1406 ieee80211_send_bar(sta
->sdata
->dev
, hdr
->addr1
,
1411 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
1412 sta
= sta_info_get(local
, hdr
->addr1
);
1414 ieee80211_handle_filtered_frame(local
, sta
, skb
);
1419 rate_control_tx_status(local
->mdev
, skb
);
1423 ieee80211_led_tx(local
, 0);
1426 * Fragments are passed to low-level drivers as separate skbs, so these
1427 * are actually fragments, not frames. Update frame counters only for
1428 * the first fragment of the frame. */
1430 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
1431 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
1433 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
1435 local
->dot11TransmittedFrameCount
++;
1436 if (is_multicast_ether_addr(hdr
->addr1
))
1437 local
->dot11MulticastTransmittedFrameCount
++;
1438 if (info
->status
.retry_count
> 0)
1439 local
->dot11RetryCount
++;
1440 if (info
->status
.retry_count
> 1)
1441 local
->dot11MultipleRetryCount
++;
1444 /* This counter shall be incremented for an acknowledged MPDU
1445 * with an individual address in the address 1 field or an MPDU
1446 * with a multicast address in the address 1 field of type Data
1448 if (!is_multicast_ether_addr(hdr
->addr1
) ||
1449 type
== IEEE80211_FTYPE_DATA
||
1450 type
== IEEE80211_FTYPE_MGMT
)
1451 local
->dot11TransmittedFragmentCount
++;
1454 local
->dot11FailedCount
++;
1457 /* this was a transmitted frame, but now we want to reuse it */
1461 * This is a bit racy but we can avoid a lot of work
1464 if (!local
->monitors
&& !local
->cooked_mntrs
) {
1469 /* send frame to monitor interfaces now */
1471 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
1472 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
1477 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
1478 skb_push(skb
, sizeof(*rthdr
));
1480 memset(rthdr
, 0, sizeof(*rthdr
));
1481 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
1482 rthdr
->hdr
.it_present
=
1483 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
1484 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
1486 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
1487 !is_multicast_ether_addr(hdr
->addr1
))
1488 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
1490 if ((info
->flags
& IEEE80211_TX_CTL_USE_RTS_CTS
) &&
1491 (info
->flags
& IEEE80211_TX_CTL_USE_CTS_PROTECT
))
1492 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
1493 else if (info
->flags
& IEEE80211_TX_CTL_USE_RTS_CTS
)
1494 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
1496 rthdr
->data_retries
= info
->status
.retry_count
;
1498 /* XXX: is this sufficient for BPF? */
1499 skb_set_mac_header(skb
, 0);
1500 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1501 skb
->pkt_type
= PACKET_OTHERHOST
;
1502 skb
->protocol
= htons(ETH_P_802_2
);
1503 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1506 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
1507 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MNTR
) {
1508 if (!netif_running(sdata
->dev
))
1512 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1514 skb2
->dev
= prev_dev
;
1519 prev_dev
= sdata
->dev
;
1523 skb
->dev
= prev_dev
;
1530 EXPORT_SYMBOL(ieee80211_tx_status
);
1532 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
1533 const struct ieee80211_ops
*ops
)
1535 struct ieee80211_local
*local
;
1537 struct wiphy
*wiphy
;
1539 /* Ensure 32-byte alignment of our private data and hw private data.
1540 * We use the wiphy priv data for both our ieee80211_local and for
1541 * the driver's private data
1543 * In memory it'll be like this:
1545 * +-------------------------+
1547 * +-------------------------+
1548 * | struct ieee80211_local |
1549 * +-------------------------+
1550 * | driver's private data |
1551 * +-------------------------+
1554 priv_size
= ((sizeof(struct ieee80211_local
) +
1555 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
1558 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
1563 wiphy
->privid
= mac80211_wiphy_privid
;
1565 local
= wiphy_priv(wiphy
);
1566 local
->hw
.wiphy
= wiphy
;
1568 local
->hw
.priv
= (char *)local
+
1569 ((sizeof(struct ieee80211_local
) +
1570 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
1573 BUG_ON(!ops
->start
);
1575 BUG_ON(!ops
->config
);
1576 BUG_ON(!ops
->add_interface
);
1577 BUG_ON(!ops
->remove_interface
);
1578 BUG_ON(!ops
->configure_filter
);
1581 local
->hw
.queues
= 1; /* default */
1583 local
->bridge_packets
= 1;
1585 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
1586 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
1587 local
->short_retry_limit
= 7;
1588 local
->long_retry_limit
= 4;
1589 local
->hw
.conf
.radio_enabled
= 1;
1591 INIT_LIST_HEAD(&local
->interfaces
);
1593 spin_lock_init(&local
->key_lock
);
1595 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
1597 sta_info_init(local
);
1599 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
1600 (unsigned long)local
);
1601 tasklet_disable(&local
->tx_pending_tasklet
);
1603 tasklet_init(&local
->tasklet
,
1604 ieee80211_tasklet_handler
,
1605 (unsigned long) local
);
1606 tasklet_disable(&local
->tasklet
);
1608 skb_queue_head_init(&local
->skb_queue
);
1609 skb_queue_head_init(&local
->skb_queue_unreliable
);
1611 return local_to_hw(local
);
1613 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1615 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1617 struct ieee80211_local
*local
= hw_to_local(hw
);
1620 enum ieee80211_band band
;
1621 struct net_device
*mdev
;
1622 struct wireless_dev
*mwdev
;
1625 * generic code guarantees at least one band,
1626 * set this very early because much code assumes
1627 * that hw.conf.channel is assigned
1629 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1630 struct ieee80211_supported_band
*sband
;
1632 sband
= local
->hw
.wiphy
->bands
[band
];
1634 /* init channel we're on */
1635 local
->hw
.conf
.channel
=
1636 local
->oper_channel
=
1637 local
->scan_channel
= &sband
->channels
[0];
1642 result
= wiphy_register(local
->hw
.wiphy
);
1647 * We use the number of queues for feature tests (QoS, HT) internally
1648 * so restrict them appropriately.
1650 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
1651 hw
->queues
= IEEE80211_MAX_QUEUES
;
1652 if (hw
->ampdu_queues
> IEEE80211_MAX_AMPDU_QUEUES
)
1653 hw
->ampdu_queues
= IEEE80211_MAX_AMPDU_QUEUES
;
1655 hw
->ampdu_queues
= 0;
1657 mdev
= alloc_netdev_mq(sizeof(struct wireless_dev
),
1658 "wmaster%d", ether_setup
,
1659 ieee80211_num_queues(hw
));
1661 goto fail_mdev_alloc
;
1663 mwdev
= netdev_priv(mdev
);
1664 mdev
->ieee80211_ptr
= mwdev
;
1665 mwdev
->wiphy
= local
->hw
.wiphy
;
1669 ieee80211_rx_bss_list_init(local
);
1671 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
1672 mdev
->open
= ieee80211_master_open
;
1673 mdev
->stop
= ieee80211_master_stop
;
1674 mdev
->type
= ARPHRD_IEEE80211
;
1675 mdev
->header_ops
= &ieee80211_header_ops
;
1676 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
1678 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1679 local
->hw
.workqueue
= create_freezeable_workqueue(name
);
1680 if (!local
->hw
.workqueue
) {
1682 goto fail_workqueue
;
1686 * The hardware needs headroom for sending the frame,
1687 * and we need some headroom for passing the frame to monitor
1688 * interfaces, but never both at the same time.
1690 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1691 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1693 debugfs_hw_add(local
);
1695 if (local
->hw
.conf
.beacon_int
< 10)
1696 local
->hw
.conf
.beacon_int
= 100;
1698 if (local
->hw
.max_listen_interval
== 0)
1699 local
->hw
.max_listen_interval
= 1;
1701 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
1703 local
->wstats_flags
|= local
->hw
.flags
& (IEEE80211_HW_SIGNAL_UNSPEC
|
1704 IEEE80211_HW_SIGNAL_DB
|
1705 IEEE80211_HW_SIGNAL_DBM
) ?
1706 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1707 local
->wstats_flags
|= local
->hw
.flags
& IEEE80211_HW_NOISE_DBM
?
1708 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1709 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
1710 local
->wstats_flags
|= IW_QUAL_DBM
;
1712 result
= sta_info_start(local
);
1717 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1721 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1722 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1724 result
= register_netdevice(local
->mdev
);
1728 result
= ieee80211_init_rate_ctrl_alg(local
,
1729 hw
->rate_control_algorithm
);
1731 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1732 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1736 result
= ieee80211_wep_init(local
);
1739 printk(KERN_DEBUG
"%s: Failed to initialize wep: %d\n",
1740 wiphy_name(local
->hw
.wiphy
), result
);
1744 local
->mdev
->select_queue
= ieee80211_select_queue
;
1746 /* add one default STA interface */
1747 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
1748 IEEE80211_IF_TYPE_STA
, NULL
);
1750 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1751 wiphy_name(local
->hw
.wiphy
));
1755 ieee80211_led_init(local
);
1760 rate_control_deinitialize(local
);
1762 unregister_netdevice(local
->mdev
);
1766 sta_info_stop(local
);
1768 debugfs_hw_del(local
);
1769 destroy_workqueue(local
->hw
.workqueue
);
1772 free_netdev(local
->mdev
);
1774 wiphy_unregister(local
->hw
.wiphy
);
1777 EXPORT_SYMBOL(ieee80211_register_hw
);
1779 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1781 struct ieee80211_local
*local
= hw_to_local(hw
);
1783 tasklet_kill(&local
->tx_pending_tasklet
);
1784 tasklet_kill(&local
->tasklet
);
1789 * At this point, interface list manipulations are fine
1790 * because the driver cannot be handing us frames any
1791 * more and the tasklet is killed.
1794 /* First, we remove all virtual interfaces. */
1795 ieee80211_remove_interfaces(local
);
1797 /* then, finally, remove the master interface */
1798 unregister_netdevice(local
->mdev
);
1802 ieee80211_rx_bss_list_deinit(local
);
1803 ieee80211_clear_tx_pending(local
);
1804 sta_info_stop(local
);
1805 rate_control_deinitialize(local
);
1806 debugfs_hw_del(local
);
1808 if (skb_queue_len(&local
->skb_queue
)
1809 || skb_queue_len(&local
->skb_queue_unreliable
))
1810 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1811 wiphy_name(local
->hw
.wiphy
));
1812 skb_queue_purge(&local
->skb_queue
);
1813 skb_queue_purge(&local
->skb_queue_unreliable
);
1815 destroy_workqueue(local
->hw
.workqueue
);
1816 wiphy_unregister(local
->hw
.wiphy
);
1817 ieee80211_wep_free(local
);
1818 ieee80211_led_exit(local
);
1819 free_netdev(local
->mdev
);
1821 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1823 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1825 struct ieee80211_local
*local
= hw_to_local(hw
);
1827 wiphy_free(local
->hw
.wiphy
);
1829 EXPORT_SYMBOL(ieee80211_free_hw
);
1831 static int __init
ieee80211_init(void)
1833 struct sk_buff
*skb
;
1836 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1837 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1838 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1840 ret
= rc80211_pid_init();
1844 ieee80211_debugfs_netdev_init();
1849 static void __exit
ieee80211_exit(void)
1854 * For key todo, it'll be empty by now but the work
1855 * might still be scheduled.
1857 flush_scheduled_work();
1862 ieee80211_debugfs_netdev_exit();
1866 subsys_initcall(ieee80211_init
);
1867 module_exit(ieee80211_exit
);
1869 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1870 MODULE_LICENSE("GPL");