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"
38 #define SUPP_MCS_SET_LEN 16
41 * For seeing transmitted packets on monitor interfaces
42 * we have a radiotap header too.
44 struct ieee80211_tx_status_rtap_hdr
{
45 struct ieee80211_radiotap_header hdr
;
48 } __attribute__ ((packed
));
50 /* common interface routines */
52 static int header_parse_80211(const struct sk_buff
*skb
, unsigned char *haddr
)
54 memcpy(haddr
, skb_mac_header(skb
) + 10, ETH_ALEN
); /* addr2 */
58 /* must be called under mdev tx lock */
59 static void ieee80211_configure_filter(struct ieee80211_local
*local
)
61 unsigned int changed_flags
;
62 unsigned int new_flags
= 0;
64 if (atomic_read(&local
->iff_promiscs
))
65 new_flags
|= FIF_PROMISC_IN_BSS
;
67 if (atomic_read(&local
->iff_allmultis
))
68 new_flags
|= FIF_ALLMULTI
;
71 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
73 if (local
->fif_fcsfail
)
74 new_flags
|= FIF_FCSFAIL
;
76 if (local
->fif_plcpfail
)
77 new_flags
|= FIF_PLCPFAIL
;
79 if (local
->fif_control
)
80 new_flags
|= FIF_CONTROL
;
82 if (local
->fif_other_bss
)
83 new_flags
|= FIF_OTHER_BSS
;
85 changed_flags
= local
->filter_flags
^ new_flags
;
90 local
->ops
->configure_filter(local_to_hw(local
),
91 changed_flags
, &new_flags
,
92 local
->mdev
->mc_count
,
93 local
->mdev
->mc_list
);
95 WARN_ON(new_flags
& (1<<31));
97 local
->filter_flags
= new_flags
& ~(1<<31);
100 /* master interface */
102 static int ieee80211_master_open(struct net_device
*dev
)
104 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
105 struct ieee80211_sub_if_data
*sdata
;
106 int res
= -EOPNOTSUPP
;
108 /* we hold the RTNL here so can safely walk the list */
109 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
110 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
)) {
118 static int ieee80211_master_stop(struct net_device
*dev
)
120 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
121 struct ieee80211_sub_if_data
*sdata
;
123 /* we hold the RTNL here so can safely walk the list */
124 list_for_each_entry(sdata
, &local
->interfaces
, list
)
125 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
))
126 dev_close(sdata
->dev
);
131 static void ieee80211_master_set_multicast_list(struct net_device
*dev
)
133 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
135 ieee80211_configure_filter(local
);
138 /* regular interfaces */
140 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
143 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
145 meshhdrlen
= (sdata
->vif
.type
== IEEE80211_IF_TYPE_MESH_POINT
) ? 5 : 0;
147 /* FIX: what would be proper limits for MTU?
148 * This interface uses 802.3 frames. */
150 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
151 printk(KERN_WARNING
"%s: invalid MTU %d\n",
156 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
157 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
158 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
163 static inline int identical_mac_addr_allowed(int type1
, int type2
)
165 return (type1
== IEEE80211_IF_TYPE_MNTR
||
166 type2
== IEEE80211_IF_TYPE_MNTR
||
167 (type1
== IEEE80211_IF_TYPE_AP
&&
168 type2
== IEEE80211_IF_TYPE_WDS
) ||
169 (type1
== IEEE80211_IF_TYPE_WDS
&&
170 (type2
== IEEE80211_IF_TYPE_WDS
||
171 type2
== IEEE80211_IF_TYPE_AP
)) ||
172 (type1
== IEEE80211_IF_TYPE_AP
&&
173 type2
== IEEE80211_IF_TYPE_VLAN
) ||
174 (type1
== IEEE80211_IF_TYPE_VLAN
&&
175 (type2
== IEEE80211_IF_TYPE_AP
||
176 type2
== IEEE80211_IF_TYPE_VLAN
)));
179 static int ieee80211_open(struct net_device
*dev
)
181 struct ieee80211_sub_if_data
*sdata
, *nsdata
;
182 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
183 struct ieee80211_if_init_conf conf
;
185 bool need_hw_reconfig
= 0;
186 struct sta_info
*sta
;
188 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
190 /* we hold the RTNL here so can safely walk the list */
191 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
192 struct net_device
*ndev
= nsdata
->dev
;
194 if (ndev
!= dev
&& ndev
!= local
->mdev
&& netif_running(ndev
)) {
196 * Allow only a single IBSS interface to be up at any
197 * time. This is restricted because beacon distribution
198 * cannot work properly if both are in the same IBSS.
200 * To remove this restriction we'd have to disallow them
201 * from setting the same SSID on different IBSS interfaces
202 * belonging to the same hardware. Then, however, we're
203 * faced with having to adopt two different TSF timers...
205 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
&&
206 nsdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
)
210 * Disallow multiple IBSS/STA mode interfaces.
212 * This is a technical restriction, it is possible although
213 * most likely not IEEE 802.11 compliant to have multiple
214 * STAs with just a single hardware (the TSF timer will not
215 * be adjusted properly.)
217 * However, because mac80211 uses the master device's BSS
218 * information for each STA/IBSS interface, doing this will
219 * currently corrupt that BSS information completely, unless,
220 * a not very useful case, both STAs are associated to the
223 * To remove this restriction, the BSS information needs to
224 * be embedded in the STA/IBSS mode sdata instead of using
225 * the master device's BSS structure.
227 if ((sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
228 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) &&
229 (nsdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
230 nsdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
))
234 * The remaining checks are only performed for interfaces
235 * with the same MAC address.
237 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
241 * check whether it may have the same address
243 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
248 * can only add VLANs to enabled APs
250 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_VLAN
&&
251 nsdata
->vif
.type
== IEEE80211_IF_TYPE_AP
)
252 sdata
->u
.vlan
.ap
= nsdata
;
256 switch (sdata
->vif
.type
) {
257 case IEEE80211_IF_TYPE_WDS
:
258 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
261 case IEEE80211_IF_TYPE_VLAN
:
262 if (!sdata
->u
.vlan
.ap
)
265 case IEEE80211_IF_TYPE_AP
:
266 case IEEE80211_IF_TYPE_STA
:
267 case IEEE80211_IF_TYPE_MNTR
:
268 case IEEE80211_IF_TYPE_IBSS
:
269 case IEEE80211_IF_TYPE_MESH_POINT
:
270 /* no special treatment */
272 case IEEE80211_IF_TYPE_INVALID
:
278 if (local
->open_count
== 0) {
280 if (local
->ops
->start
)
281 res
= local
->ops
->start(local_to_hw(local
));
284 need_hw_reconfig
= 1;
285 ieee80211_led_radio(local
, local
->hw
.conf
.radio_enabled
);
288 switch (sdata
->vif
.type
) {
289 case IEEE80211_IF_TYPE_VLAN
:
290 list_add(&sdata
->u
.vlan
.list
, &sdata
->u
.vlan
.ap
->u
.ap
.vlans
);
291 /* no need to tell driver */
293 case IEEE80211_IF_TYPE_MNTR
:
294 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
295 local
->cooked_mntrs
++;
299 /* must be before the call to ieee80211_configure_filter */
301 if (local
->monitors
== 1)
302 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
304 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
305 local
->fif_fcsfail
++;
306 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
307 local
->fif_plcpfail
++;
308 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
309 local
->fif_control
++;
310 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
311 local
->fif_other_bss
++;
313 netif_tx_lock_bh(local
->mdev
);
314 ieee80211_configure_filter(local
);
315 netif_tx_unlock_bh(local
->mdev
);
317 case IEEE80211_IF_TYPE_STA
:
318 case IEEE80211_IF_TYPE_IBSS
:
319 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
322 conf
.vif
= &sdata
->vif
;
323 conf
.type
= sdata
->vif
.type
;
324 conf
.mac_addr
= dev
->dev_addr
;
325 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
329 ieee80211_if_config(dev
);
330 ieee80211_reset_erp_info(dev
);
331 ieee80211_enable_keys(sdata
);
333 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
&&
334 !(sdata
->flags
& IEEE80211_SDATA_USERSPACE_MLME
))
335 netif_carrier_off(dev
);
337 netif_carrier_on(dev
);
340 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_WDS
) {
341 /* Create STA entry for the WDS peer */
342 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
346 goto err_del_interface
;
349 sta
->flags
|= WLAN_STA_AUTHORIZED
;
351 res
= sta_info_insert(sta
);
353 /* STA has been freed */
354 goto err_del_interface
;
358 if (local
->open_count
== 0) {
359 res
= dev_open(local
->mdev
);
362 goto err_del_interface
;
363 tasklet_enable(&local
->tx_pending_tasklet
);
364 tasklet_enable(&local
->tasklet
);
368 * set_multicast_list will be invoked by the networking core
369 * which will check whether any increments here were done in
370 * error and sync them down to the hardware as filter flags.
372 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
373 atomic_inc(&local
->iff_allmultis
);
375 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
376 atomic_inc(&local
->iff_promiscs
);
379 if (need_hw_reconfig
)
380 ieee80211_hw_config(local
);
383 * ieee80211_sta_work is disabled while network interface
384 * is down. Therefore, some configuration changes may not
385 * yet be effective. Trigger execution of ieee80211_sta_work
388 if(sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
389 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
390 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
391 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
394 netif_start_queue(dev
);
398 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
400 if (!local
->open_count
&& local
->ops
->stop
)
401 local
->ops
->stop(local_to_hw(local
));
405 static int ieee80211_stop(struct net_device
*dev
)
407 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
408 struct ieee80211_local
*local
= sdata
->local
;
409 struct ieee80211_if_init_conf conf
;
410 struct sta_info
*sta
;
413 * Stop TX on this interface first.
415 netif_stop_queue(dev
);
418 * Now delete all active aggregation sessions.
422 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
423 if (sta
->sdata
== sdata
)
424 ieee80211_sta_tear_down_BA_sessions(dev
, sta
->addr
);
430 * Remove all stations associated with this interface.
432 * This must be done before calling ops->remove_interface()
433 * because otherwise we can later invoke ops->sta_notify()
434 * whenever the STAs are removed, and that invalidates driver
435 * assumptions about always getting a vif pointer that is valid
436 * (because if we remove a STA after ops->remove_interface()
437 * the driver will have removed the vif info already!)
439 * We could relax this and only unlink the stations from the
440 * hash table and list but keep them on a per-sdata list that
441 * will be inserted back again when the interface is brought
442 * up again, but I don't currently see a use case for that,
443 * except with WDS which gets a STA entry created when it is
446 sta_info_flush(local
, sdata
);
449 * Don't count this interface for promisc/allmulti while it
450 * is down. dev_mc_unsync() will invoke set_multicast_list
451 * on the master interface which will sync these down to the
452 * hardware as filter flags.
454 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
455 atomic_dec(&local
->iff_allmultis
);
457 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
458 atomic_dec(&local
->iff_promiscs
);
460 dev_mc_unsync(local
->mdev
, dev
);
462 /* APs need special treatment */
463 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
464 struct ieee80211_sub_if_data
*vlan
, *tmp
;
465 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
468 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
472 /* down all dependent devices, that is VLANs */
473 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
475 dev_close(vlan
->dev
);
476 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
481 switch (sdata
->vif
.type
) {
482 case IEEE80211_IF_TYPE_VLAN
:
483 list_del(&sdata
->u
.vlan
.list
);
484 sdata
->u
.vlan
.ap
= NULL
;
485 /* no need to tell driver */
487 case IEEE80211_IF_TYPE_MNTR
:
488 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
489 local
->cooked_mntrs
--;
494 if (local
->monitors
== 0)
495 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
497 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
498 local
->fif_fcsfail
--;
499 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
500 local
->fif_plcpfail
--;
501 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
502 local
->fif_control
--;
503 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
504 local
->fif_other_bss
--;
506 netif_tx_lock_bh(local
->mdev
);
507 ieee80211_configure_filter(local
);
508 netif_tx_unlock_bh(local
->mdev
);
510 case IEEE80211_IF_TYPE_MESH_POINT
:
511 case IEEE80211_IF_TYPE_STA
:
512 case IEEE80211_IF_TYPE_IBSS
:
513 sdata
->u
.sta
.state
= IEEE80211_DISABLED
;
514 memset(sdata
->u
.sta
.bssid
, 0, ETH_ALEN
);
515 del_timer_sync(&sdata
->u
.sta
.timer
);
517 * When we get here, the interface is marked down.
518 * Call synchronize_rcu() to wait for the RX path
519 * should it be using the interface and enqueuing
520 * frames at this very time on another CPU.
523 skb_queue_purge(&sdata
->u
.sta
.skb_queue
);
525 if (local
->scan_dev
== sdata
->dev
) {
526 if (!local
->ops
->hw_scan
) {
527 local
->sta_sw_scanning
= 0;
528 cancel_delayed_work(&local
->scan_work
);
530 local
->sta_hw_scanning
= 0;
533 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PRIVACY_INVOKED
;
534 kfree(sdata
->u
.sta
.extra_ie
);
535 sdata
->u
.sta
.extra_ie
= NULL
;
536 sdata
->u
.sta
.extra_ie_len
= 0;
539 conf
.vif
= &sdata
->vif
;
540 conf
.type
= sdata
->vif
.type
;
541 conf
.mac_addr
= dev
->dev_addr
;
542 /* disable all keys for as long as this netdev is down */
543 ieee80211_disable_keys(sdata
);
544 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
547 if (local
->open_count
== 0) {
548 if (netif_running(local
->mdev
))
549 dev_close(local
->mdev
);
551 if (local
->ops
->stop
)
552 local
->ops
->stop(local_to_hw(local
));
554 ieee80211_led_radio(local
, 0);
556 flush_workqueue(local
->hw
.workqueue
);
558 tasklet_disable(&local
->tx_pending_tasklet
);
559 tasklet_disable(&local
->tasklet
);
565 int ieee80211_start_tx_ba_session(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
567 struct ieee80211_local
*local
= hw_to_local(hw
);
568 struct sta_info
*sta
;
569 struct ieee80211_sub_if_data
*sdata
;
570 u16 start_seq_num
= 0;
573 DECLARE_MAC_BUF(mac
);
575 if (tid
>= STA_TID_NUM
)
578 #ifdef CONFIG_MAC80211_HT_DEBUG
579 printk(KERN_DEBUG
"Open BA session requested for %s tid %u\n",
580 print_mac(mac
, ra
), tid
);
581 #endif /* CONFIG_MAC80211_HT_DEBUG */
585 sta
= sta_info_get(local
, ra
);
587 printk(KERN_DEBUG
"Could not find the station\n");
592 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
594 /* we have tried too many times, receiver does not want A-MPDU */
595 if (sta
->ampdu_mlme
.addba_req_num
[tid
] > HT_AGG_MAX_RETRIES
) {
600 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
601 /* check if the TID is not in aggregation flow already */
602 if (*state
!= HT_AGG_STATE_IDLE
) {
603 #ifdef CONFIG_MAC80211_HT_DEBUG
604 printk(KERN_DEBUG
"BA request denied - session is not "
605 "idle on tid %u\n", tid
);
606 #endif /* CONFIG_MAC80211_HT_DEBUG */
611 /* prepare A-MPDU MLME for Tx aggregation */
612 sta
->ampdu_mlme
.tid_tx
[tid
] =
613 kmalloc(sizeof(struct tid_ampdu_tx
), GFP_ATOMIC
);
614 if (!sta
->ampdu_mlme
.tid_tx
[tid
]) {
616 printk(KERN_ERR
"allocate tx mlme to tid %d failed\n",
622 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.function
=
623 sta_addba_resp_timer_expired
;
624 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.data
=
625 (unsigned long)&sta
->timer_to_tid
[tid
];
626 init_timer(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
628 /* ensure that TX flow won't interrupt us
629 * until the end of the call to requeue function */
630 spin_lock_bh(&local
->mdev
->queue_lock
);
632 /* create a new queue for this aggregation */
633 ret
= ieee80211_ht_agg_queue_add(local
, sta
, tid
);
635 /* case no queue is available to aggregation
636 * don't switch to aggregation */
638 #ifdef CONFIG_MAC80211_HT_DEBUG
639 printk(KERN_DEBUG
"BA request denied - queue unavailable for"
641 #endif /* CONFIG_MAC80211_HT_DEBUG */
646 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
647 * call back right away, it must see that the flow has begun */
648 *state
|= HT_ADDBA_REQUESTED_MSK
;
650 if (local
->ops
->ampdu_action
)
651 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_START
,
652 ra
, tid
, &start_seq_num
);
655 /* No need to requeue the packets in the agg queue, since we
656 * held the tx lock: no packet could be enqueued to the newly
658 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 0);
659 #ifdef CONFIG_MAC80211_HT_DEBUG
660 printk(KERN_DEBUG
"BA request denied - HW unavailable for"
662 #endif /* CONFIG_MAC80211_HT_DEBUG */
663 *state
= HT_AGG_STATE_IDLE
;
667 /* Will put all the packets in the new SW queue */
668 ieee80211_requeue(local
, ieee802_1d_to_ac
[tid
]);
669 spin_unlock_bh(&local
->mdev
->queue_lock
);
671 /* send an addBA request */
672 sta
->ampdu_mlme
.dialog_token_allocator
++;
673 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
=
674 sta
->ampdu_mlme
.dialog_token_allocator
;
675 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
= start_seq_num
;
677 ieee80211_send_addba_request(sta
->sdata
->dev
, ra
, tid
,
678 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
,
679 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
,
682 /* activate the timer for the recipient's addBA response */
683 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.expires
=
684 jiffies
+ ADDBA_RESP_INTERVAL
;
685 add_timer(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
686 printk(KERN_DEBUG
"activated addBA response timer on tid %d\n", tid
);
690 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
691 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
692 spin_unlock_bh(&local
->mdev
->queue_lock
);
695 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
699 EXPORT_SYMBOL(ieee80211_start_tx_ba_session
);
701 int ieee80211_stop_tx_ba_session(struct ieee80211_hw
*hw
,
703 enum ieee80211_back_parties initiator
)
705 struct ieee80211_local
*local
= hw_to_local(hw
);
706 struct sta_info
*sta
;
709 DECLARE_MAC_BUF(mac
);
711 if (tid
>= STA_TID_NUM
)
715 sta
= sta_info_get(local
, ra
);
721 /* check if the TID is in aggregation */
722 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
723 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
725 if (*state
!= HT_AGG_STATE_OPERATIONAL
) {
730 #ifdef CONFIG_MAC80211_HT_DEBUG
731 printk(KERN_DEBUG
"Tx BA session stop requested for %s tid %u\n",
732 print_mac(mac
, ra
), tid
);
733 #endif /* CONFIG_MAC80211_HT_DEBUG */
735 ieee80211_stop_queue(hw
, sta
->tid_to_tx_q
[tid
]);
737 *state
= HT_AGG_STATE_REQ_STOP_BA_MSK
|
738 (initiator
<< HT_AGG_STATE_INITIATOR_SHIFT
);
740 if (local
->ops
->ampdu_action
)
741 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_STOP
,
744 /* case HW denied going back to legacy */
746 WARN_ON(ret
!= -EBUSY
);
747 *state
= HT_AGG_STATE_OPERATIONAL
;
748 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
753 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
757 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session
);
759 void ieee80211_start_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
761 struct ieee80211_local
*local
= hw_to_local(hw
);
762 struct sta_info
*sta
;
764 DECLARE_MAC_BUF(mac
);
766 if (tid
>= STA_TID_NUM
) {
767 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
773 sta
= sta_info_get(local
, ra
);
776 printk(KERN_DEBUG
"Could not find station: %s\n",
781 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
782 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
784 if (!(*state
& HT_ADDBA_REQUESTED_MSK
)) {
785 printk(KERN_DEBUG
"addBA was not requested yet, state is %d\n",
787 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
792 WARN_ON_ONCE(*state
& HT_ADDBA_DRV_READY_MSK
);
794 *state
|= HT_ADDBA_DRV_READY_MSK
;
796 if (*state
== HT_AGG_STATE_OPERATIONAL
) {
797 printk(KERN_DEBUG
"Aggregation is on for tid %d \n", tid
);
798 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
800 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
803 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb
);
805 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u8 tid
)
807 struct ieee80211_local
*local
= hw_to_local(hw
);
808 struct sta_info
*sta
;
811 DECLARE_MAC_BUF(mac
);
813 if (tid
>= STA_TID_NUM
) {
814 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
819 #ifdef CONFIG_MAC80211_HT_DEBUG
820 printk(KERN_DEBUG
"Stopping Tx BA session for %s tid %d\n",
821 print_mac(mac
, ra
), tid
);
822 #endif /* CONFIG_MAC80211_HT_DEBUG */
825 sta
= sta_info_get(local
, ra
);
827 printk(KERN_DEBUG
"Could not find station: %s\n",
832 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
834 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
835 if ((*state
& HT_AGG_STATE_REQ_STOP_BA_MSK
) == 0) {
836 printk(KERN_DEBUG
"unexpected callback to A-MPDU stop\n");
837 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
842 if (*state
& HT_AGG_STATE_INITIATOR_MSK
)
843 ieee80211_send_delba(sta
->sdata
->dev
, ra
, tid
,
844 WLAN_BACK_INITIATOR
, WLAN_REASON_QSTA_NOT_USE
);
846 agg_queue
= sta
->tid_to_tx_q
[tid
];
848 /* avoid ordering issues: we are the only one that can modify
849 * the content of the qdiscs */
850 spin_lock_bh(&local
->mdev
->queue_lock
);
851 /* remove the queue for this aggregation */
852 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 1);
853 spin_unlock_bh(&local
->mdev
->queue_lock
);
855 /* we just requeued the all the frames that were in the removed
856 * queue, and since we might miss a softirq we do netif_schedule.
857 * ieee80211_wake_queue is not used here as this queue is not
858 * necessarily stopped */
859 netif_schedule(local
->mdev
);
860 *state
= HT_AGG_STATE_IDLE
;
861 sta
->ampdu_mlme
.addba_req_num
[tid
] = 0;
862 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
863 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
864 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
868 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb
);
870 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
871 const u8
*ra
, u16 tid
)
873 struct ieee80211_local
*local
= hw_to_local(hw
);
874 struct ieee80211_ra_tid
*ra_tid
;
875 struct sk_buff
*skb
= dev_alloc_skb(0);
877 if (unlikely(!skb
)) {
879 printk(KERN_WARNING
"%s: Not enough memory, "
880 "dropping start BA session", skb
->dev
->name
);
883 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
884 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
887 skb
->pkt_type
= IEEE80211_ADDBA_MSG
;
888 skb_queue_tail(&local
->skb_queue
, skb
);
889 tasklet_schedule(&local
->tasklet
);
891 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe
);
893 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
894 const u8
*ra
, u16 tid
)
896 struct ieee80211_local
*local
= hw_to_local(hw
);
897 struct ieee80211_ra_tid
*ra_tid
;
898 struct sk_buff
*skb
= dev_alloc_skb(0);
900 if (unlikely(!skb
)) {
902 printk(KERN_WARNING
"%s: Not enough memory, "
903 "dropping stop BA session", skb
->dev
->name
);
906 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
907 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
910 skb
->pkt_type
= IEEE80211_DELBA_MSG
;
911 skb_queue_tail(&local
->skb_queue
, skb
);
912 tasklet_schedule(&local
->tasklet
);
914 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe
);
916 static void ieee80211_set_multicast_list(struct net_device
*dev
)
918 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
919 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
920 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
922 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
923 promisc
= !!(dev
->flags
& IFF_PROMISC
);
924 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
925 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
927 if (allmulti
!= sdata_allmulti
) {
928 if (dev
->flags
& IFF_ALLMULTI
)
929 atomic_inc(&local
->iff_allmultis
);
931 atomic_dec(&local
->iff_allmultis
);
932 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
935 if (promisc
!= sdata_promisc
) {
936 if (dev
->flags
& IFF_PROMISC
)
937 atomic_inc(&local
->iff_promiscs
);
939 atomic_dec(&local
->iff_promiscs
);
940 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
943 dev_mc_sync(local
->mdev
, dev
);
946 static const struct header_ops ieee80211_header_ops
= {
947 .create
= eth_header
,
948 .parse
= header_parse_80211
,
949 .rebuild
= eth_rebuild_header
,
950 .cache
= eth_header_cache
,
951 .cache_update
= eth_header_cache_update
,
954 /* Must not be called for mdev */
955 void ieee80211_if_setup(struct net_device
*dev
)
958 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
959 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
960 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
961 dev
->change_mtu
= ieee80211_change_mtu
;
962 dev
->open
= ieee80211_open
;
963 dev
->stop
= ieee80211_stop
;
964 dev
->destructor
= ieee80211_if_free
;
967 /* everything else */
969 static int __ieee80211_if_config(struct net_device
*dev
,
970 struct sk_buff
*beacon
,
971 struct ieee80211_tx_control
*control
)
973 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
974 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
975 struct ieee80211_if_conf conf
;
977 if (!local
->ops
->config_interface
|| !netif_running(dev
))
980 memset(&conf
, 0, sizeof(conf
));
981 conf
.type
= sdata
->vif
.type
;
982 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
983 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
984 conf
.bssid
= sdata
->u
.sta
.bssid
;
985 conf
.ssid
= sdata
->u
.sta
.ssid
;
986 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
987 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
988 conf
.beacon
= beacon
;
989 conf
.beacon_control
= control
;
990 ieee80211_start_mesh(dev
);
991 } else if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
992 conf
.ssid
= sdata
->u
.ap
.ssid
;
993 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
994 conf
.beacon
= beacon
;
995 conf
.beacon_control
= control
;
997 return local
->ops
->config_interface(local_to_hw(local
),
1001 int ieee80211_if_config(struct net_device
*dev
)
1003 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1004 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1005 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MESH_POINT
&&
1006 (local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
1007 return ieee80211_if_config_beacon(dev
);
1008 return __ieee80211_if_config(dev
, NULL
, NULL
);
1011 int ieee80211_if_config_beacon(struct net_device
*dev
)
1013 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1014 struct ieee80211_tx_control control
;
1015 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1016 struct sk_buff
*skb
;
1018 if (!(local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
1020 skb
= ieee80211_beacon_get(local_to_hw(local
), &sdata
->vif
,
1024 return __ieee80211_if_config(dev
, skb
, &control
);
1027 int ieee80211_hw_config(struct ieee80211_local
*local
)
1029 struct ieee80211_channel
*chan
;
1032 if (local
->sta_sw_scanning
)
1033 chan
= local
->scan_channel
;
1035 chan
= local
->oper_channel
;
1037 local
->hw
.conf
.channel
= chan
;
1039 if (!local
->hw
.conf
.power_level
)
1040 local
->hw
.conf
.power_level
= chan
->max_power
;
1042 local
->hw
.conf
.power_level
= min(chan
->max_power
,
1043 local
->hw
.conf
.power_level
);
1045 local
->hw
.conf
.max_antenna_gain
= chan
->max_antenna_gain
;
1047 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1048 printk(KERN_DEBUG
"%s: HW CONFIG: freq=%d\n",
1049 wiphy_name(local
->hw
.wiphy
), chan
->center_freq
);
1052 if (local
->open_count
)
1053 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
1059 * ieee80211_handle_ht should be used only after legacy configuration
1060 * has been determined namely band, as ht configuration depends upon
1061 * the hardware's HT abilities for a _specific_ band.
1063 u32
ieee80211_handle_ht(struct ieee80211_local
*local
, int enable_ht
,
1064 struct ieee80211_ht_info
*req_ht_cap
,
1065 struct ieee80211_ht_bss_info
*req_bss_cap
)
1067 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1068 struct ieee80211_supported_band
*sband
;
1069 struct ieee80211_ht_info ht_conf
;
1070 struct ieee80211_ht_bss_info ht_bss_conf
;
1074 sband
= local
->hw
.wiphy
->bands
[conf
->channel
->band
];
1076 /* HT is not supported */
1077 if (!sband
->ht_info
.ht_supported
) {
1078 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1082 memset(&ht_conf
, 0, sizeof(struct ieee80211_ht_info
));
1083 memset(&ht_bss_conf
, 0, sizeof(struct ieee80211_ht_bss_info
));
1086 if (!(conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
))
1087 changed
|= BSS_CHANGED_HT
;
1089 conf
->flags
|= IEEE80211_CONF_SUPPORT_HT_MODE
;
1090 ht_conf
.ht_supported
= 1;
1092 ht_conf
.cap
= req_ht_cap
->cap
& sband
->ht_info
.cap
;
1093 ht_conf
.cap
&= ~(IEEE80211_HT_CAP_MIMO_PS
);
1094 ht_conf
.cap
|= sband
->ht_info
.cap
& IEEE80211_HT_CAP_MIMO_PS
;
1096 for (i
= 0; i
< SUPP_MCS_SET_LEN
; i
++)
1097 ht_conf
.supp_mcs_set
[i
] =
1098 sband
->ht_info
.supp_mcs_set
[i
] &
1099 req_ht_cap
->supp_mcs_set
[i
];
1101 ht_bss_conf
.primary_channel
= req_bss_cap
->primary_channel
;
1102 ht_bss_conf
.bss_cap
= req_bss_cap
->bss_cap
;
1103 ht_bss_conf
.bss_op_mode
= req_bss_cap
->bss_op_mode
;
1105 ht_conf
.ampdu_factor
= req_ht_cap
->ampdu_factor
;
1106 ht_conf
.ampdu_density
= req_ht_cap
->ampdu_density
;
1108 /* if bss configuration changed store the new one */
1109 if (memcmp(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
)) ||
1110 memcmp(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
))) {
1111 changed
|= BSS_CHANGED_HT
;
1112 memcpy(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
));
1113 memcpy(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
));
1116 if (conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
)
1117 changed
|= BSS_CHANGED_HT
;
1118 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1124 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
1127 struct ieee80211_local
*local
= sdata
->local
;
1132 if (local
->ops
->bss_info_changed
)
1133 local
->ops
->bss_info_changed(local_to_hw(local
),
1139 void ieee80211_reset_erp_info(struct net_device
*dev
)
1141 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1143 sdata
->bss_conf
.use_cts_prot
= 0;
1144 sdata
->bss_conf
.use_short_preamble
= 0;
1145 ieee80211_bss_info_change_notify(sdata
,
1146 BSS_CHANGED_ERP_CTS_PROT
|
1147 BSS_CHANGED_ERP_PREAMBLE
);
1150 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
1151 struct sk_buff
*skb
,
1152 struct ieee80211_tx_status
*status
)
1154 struct ieee80211_local
*local
= hw_to_local(hw
);
1155 struct ieee80211_tx_status
*saved
;
1158 skb
->dev
= local
->mdev
;
1159 saved
= kmalloc(sizeof(struct ieee80211_tx_status
), GFP_ATOMIC
);
1160 if (unlikely(!saved
)) {
1161 if (net_ratelimit())
1162 printk(KERN_WARNING
"%s: Not enough memory, "
1163 "dropping tx status", skb
->dev
->name
);
1164 /* should be dev_kfree_skb_irq, but due to this function being
1165 * named _irqsafe instead of just _irq we can't be sure that
1166 * people won't call it from non-irq contexts */
1167 dev_kfree_skb_any(skb
);
1170 memcpy(saved
, status
, sizeof(struct ieee80211_tx_status
));
1171 /* copy pointer to saved status into skb->cb for use by tasklet */
1172 memcpy(skb
->cb
, &saved
, sizeof(saved
));
1174 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
1175 skb_queue_tail(status
->control
.flags
& IEEE80211_TXCTL_REQ_TX_STATUS
?
1176 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
1177 tmp
= skb_queue_len(&local
->skb_queue
) +
1178 skb_queue_len(&local
->skb_queue_unreliable
);
1179 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
1180 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1181 memcpy(&saved
, skb
->cb
, sizeof(saved
));
1183 dev_kfree_skb_irq(skb
);
1185 I802_DEBUG_INC(local
->tx_status_drop
);
1187 tasklet_schedule(&local
->tasklet
);
1189 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
1191 static void ieee80211_tasklet_handler(unsigned long data
)
1193 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
1194 struct sk_buff
*skb
;
1195 struct ieee80211_rx_status rx_status
;
1196 struct ieee80211_tx_status
*tx_status
;
1197 struct ieee80211_ra_tid
*ra_tid
;
1199 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
1200 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1201 switch (skb
->pkt_type
) {
1202 case IEEE80211_RX_MSG
:
1203 /* status is in skb->cb */
1204 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
1205 /* Clear skb->pkt_type in order to not confuse kernel
1208 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
1210 case IEEE80211_TX_STATUS_MSG
:
1211 /* get pointer to saved status out of skb->cb */
1212 memcpy(&tx_status
, skb
->cb
, sizeof(tx_status
));
1214 ieee80211_tx_status(local_to_hw(local
),
1218 case IEEE80211_DELBA_MSG
:
1219 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1220 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
1221 ra_tid
->ra
, ra_tid
->tid
);
1224 case IEEE80211_ADDBA_MSG
:
1225 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1226 ieee80211_start_tx_ba_cb(local_to_hw(local
),
1227 ra_tid
->ra
, ra_tid
->tid
);
1230 default: /* should never get here! */
1231 printk(KERN_ERR
"%s: Unknown message type (%d)\n",
1232 wiphy_name(local
->hw
.wiphy
), skb
->pkt_type
);
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.
1242 * Also, tx_packet_data in cb is restored from tx_control. */
1243 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
1244 struct ieee80211_key
*key
,
1245 struct sk_buff
*skb
,
1246 struct ieee80211_tx_control
*control
)
1248 int hdrlen
, iv_len
, mic_len
;
1249 struct ieee80211_tx_packet_data
*pkt_data
;
1251 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
1252 pkt_data
->ifindex
= vif_to_sdata(control
->vif
)->dev
->ifindex
;
1253 pkt_data
->flags
= 0;
1254 if (control
->flags
& IEEE80211_TXCTL_REQ_TX_STATUS
)
1255 pkt_data
->flags
|= IEEE80211_TXPD_REQ_TX_STATUS
;
1256 if (control
->flags
& IEEE80211_TXCTL_DO_NOT_ENCRYPT
)
1257 pkt_data
->flags
|= IEEE80211_TXPD_DO_NOT_ENCRYPT
;
1258 if (control
->flags
& IEEE80211_TXCTL_REQUEUE
)
1259 pkt_data
->flags
|= IEEE80211_TXPD_REQUEUE
;
1260 if (control
->flags
& IEEE80211_TXCTL_EAPOL_FRAME
)
1261 pkt_data
->flags
|= IEEE80211_TXPD_EAPOL_FRAME
;
1262 pkt_data
->queue
= control
->queue
;
1264 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1269 switch (key
->conf
.alg
) {
1271 iv_len
= WEP_IV_LEN
;
1272 mic_len
= WEP_ICV_LEN
;
1275 iv_len
= TKIP_IV_LEN
;
1276 mic_len
= TKIP_ICV_LEN
;
1279 iv_len
= CCMP_HDR_LEN
;
1280 mic_len
= CCMP_MIC_LEN
;
1286 if (skb
->len
>= mic_len
&&
1287 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
1288 skb_trim(skb
, skb
->len
- mic_len
);
1289 if (skb
->len
>= iv_len
&& skb
->len
> hdrlen
) {
1290 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
1291 skb_pull(skb
, iv_len
);
1296 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1297 u16 fc
= le16_to_cpu(hdr
->frame_control
);
1298 if ((fc
& 0x8C) == 0x88) /* QoS Control Field */ {
1299 fc
&= ~IEEE80211_STYPE_QOS_DATA
;
1300 hdr
->frame_control
= cpu_to_le16(fc
);
1301 memmove(skb
->data
+ 2, skb
->data
, hdrlen
- 2);
1307 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
1308 struct sta_info
*sta
,
1309 struct sk_buff
*skb
,
1310 struct ieee80211_tx_status
*status
)
1312 sta
->tx_filtered_count
++;
1315 * Clear the TX filter mask for this STA when sending the next
1316 * packet. If the STA went to power save mode, this will happen
1317 * when it wakes up for the next time.
1319 sta
->flags
|= WLAN_STA_CLEAR_PS_FILT
;
1322 * This code races in the following way:
1324 * (1) STA sends frame indicating it will go to sleep and does so
1325 * (2) hardware/firmware adds STA to filter list, passes frame up
1326 * (3) hardware/firmware processes TX fifo and suppresses a frame
1327 * (4) we get TX status before having processed the frame and
1328 * knowing that the STA has gone to sleep.
1330 * This is actually quite unlikely even when both those events are
1331 * processed from interrupts coming in quickly after one another or
1332 * even at the same time because we queue both TX status events and
1333 * RX frames to be processed by a tasklet and process them in the
1334 * same order that they were received or TX status last. Hence, there
1335 * is no race as long as the frame RX is processed before the next TX
1336 * status, which drivers can ensure, see below.
1338 * Note that this can only happen if the hardware or firmware can
1339 * actually add STAs to the filter list, if this is done by the
1340 * driver in response to set_tim() (which will only reduce the race
1341 * this whole filtering tries to solve, not completely solve it)
1342 * this situation cannot happen.
1344 * To completely solve this race drivers need to make sure that they
1345 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1347 * (b) always process RX events before TX status events if ordering
1348 * can be unknown, for example with different interrupt status
1351 if (sta
->flags
& WLAN_STA_PS
&&
1352 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
1353 ieee80211_remove_tx_extra(local
, sta
->key
, skb
,
1355 skb_queue_tail(&sta
->tx_filtered
, skb
);
1359 if (!(sta
->flags
& WLAN_STA_PS
) &&
1360 !(status
->control
.flags
& IEEE80211_TXCTL_REQUEUE
)) {
1361 /* Software retry the packet once */
1362 status
->control
.flags
|= IEEE80211_TXCTL_REQUEUE
;
1363 ieee80211_remove_tx_extra(local
, sta
->key
, skb
,
1365 dev_queue_xmit(skb
);
1369 if (net_ratelimit())
1370 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
1371 "queue_len=%d PS=%d @%lu\n",
1372 wiphy_name(local
->hw
.wiphy
),
1373 skb_queue_len(&sta
->tx_filtered
),
1374 !!(sta
->flags
& WLAN_STA_PS
), jiffies
);
1378 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
1379 struct ieee80211_tx_status
*status
)
1381 struct sk_buff
*skb2
;
1382 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1383 struct ieee80211_local
*local
= hw_to_local(hw
);
1385 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
1386 struct ieee80211_sub_if_data
*sdata
;
1387 struct net_device
*prev_dev
= NULL
;
1391 "%s: ieee80211_tx_status called with NULL status\n",
1392 wiphy_name(local
->hw
.wiphy
));
1399 if (status
->excessive_retries
) {
1400 struct sta_info
*sta
;
1401 sta
= sta_info_get(local
, hdr
->addr1
);
1403 if (sta
->flags
& WLAN_STA_PS
) {
1405 * The STA is in power save mode, so assume
1406 * that this TX packet failed because of that.
1408 status
->excessive_retries
= 0;
1409 status
->flags
|= IEEE80211_TX_STATUS_TX_FILTERED
;
1410 ieee80211_handle_filtered_frame(local
, sta
,
1418 if (status
->flags
& IEEE80211_TX_STATUS_TX_FILTERED
) {
1419 struct sta_info
*sta
;
1420 sta
= sta_info_get(local
, hdr
->addr1
);
1422 ieee80211_handle_filtered_frame(local
, sta
, skb
,
1428 rate_control_tx_status(local
->mdev
, skb
, status
);
1432 ieee80211_led_tx(local
, 0);
1435 * Fragments are passed to low-level drivers as separate skbs, so these
1436 * are actually fragments, not frames. Update frame counters only for
1437 * the first fragment of the frame. */
1439 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
1440 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
1442 if (status
->flags
& IEEE80211_TX_STATUS_ACK
) {
1444 local
->dot11TransmittedFrameCount
++;
1445 if (is_multicast_ether_addr(hdr
->addr1
))
1446 local
->dot11MulticastTransmittedFrameCount
++;
1447 if (status
->retry_count
> 0)
1448 local
->dot11RetryCount
++;
1449 if (status
->retry_count
> 1)
1450 local
->dot11MultipleRetryCount
++;
1453 /* This counter shall be incremented for an acknowledged MPDU
1454 * with an individual address in the address 1 field or an MPDU
1455 * with a multicast address in the address 1 field of type Data
1457 if (!is_multicast_ether_addr(hdr
->addr1
) ||
1458 type
== IEEE80211_FTYPE_DATA
||
1459 type
== IEEE80211_FTYPE_MGMT
)
1460 local
->dot11TransmittedFragmentCount
++;
1463 local
->dot11FailedCount
++;
1466 /* this was a transmitted frame, but now we want to reuse it */
1470 * This is a bit racy but we can avoid a lot of work
1473 if (!local
->monitors
&& !local
->cooked_mntrs
) {
1478 /* send frame to monitor interfaces now */
1480 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
1481 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
1486 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
1487 skb_push(skb
, sizeof(*rthdr
));
1489 memset(rthdr
, 0, sizeof(*rthdr
));
1490 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
1491 rthdr
->hdr
.it_present
=
1492 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
1493 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
1495 if (!(status
->flags
& IEEE80211_TX_STATUS_ACK
) &&
1496 !is_multicast_ether_addr(hdr
->addr1
))
1497 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
1499 if ((status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) &&
1500 (status
->control
.flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
))
1501 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
1502 else if (status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
)
1503 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
1505 rthdr
->data_retries
= status
->retry_count
;
1507 /* XXX: is this sufficient for BPF? */
1508 skb_set_mac_header(skb
, 0);
1509 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1510 skb
->pkt_type
= PACKET_OTHERHOST
;
1511 skb
->protocol
= htons(ETH_P_802_2
);
1512 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1515 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
1516 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MNTR
) {
1517 if (!netif_running(sdata
->dev
))
1521 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1523 skb2
->dev
= prev_dev
;
1528 prev_dev
= sdata
->dev
;
1532 skb
->dev
= prev_dev
;
1539 EXPORT_SYMBOL(ieee80211_tx_status
);
1541 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
1542 const struct ieee80211_ops
*ops
)
1544 struct ieee80211_local
*local
;
1546 struct wiphy
*wiphy
;
1548 /* Ensure 32-byte alignment of our private data and hw private data.
1549 * We use the wiphy priv data for both our ieee80211_local and for
1550 * the driver's private data
1552 * In memory it'll be like this:
1554 * +-------------------------+
1556 * +-------------------------+
1557 * | struct ieee80211_local |
1558 * +-------------------------+
1559 * | driver's private data |
1560 * +-------------------------+
1563 priv_size
= ((sizeof(struct ieee80211_local
) +
1564 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
1567 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
1572 wiphy
->privid
= mac80211_wiphy_privid
;
1574 local
= wiphy_priv(wiphy
);
1575 local
->hw
.wiphy
= wiphy
;
1577 local
->hw
.priv
= (char *)local
+
1578 ((sizeof(struct ieee80211_local
) +
1579 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
1582 BUG_ON(!ops
->start
);
1584 BUG_ON(!ops
->config
);
1585 BUG_ON(!ops
->add_interface
);
1586 BUG_ON(!ops
->remove_interface
);
1587 BUG_ON(!ops
->configure_filter
);
1590 local
->hw
.queues
= 1; /* default */
1592 local
->bridge_packets
= 1;
1594 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
1595 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
1596 local
->short_retry_limit
= 7;
1597 local
->long_retry_limit
= 4;
1598 local
->hw
.conf
.radio_enabled
= 1;
1600 INIT_LIST_HEAD(&local
->interfaces
);
1602 spin_lock_init(&local
->key_lock
);
1604 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
1606 sta_info_init(local
);
1608 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
1609 (unsigned long)local
);
1610 tasklet_disable(&local
->tx_pending_tasklet
);
1612 tasklet_init(&local
->tasklet
,
1613 ieee80211_tasklet_handler
,
1614 (unsigned long) local
);
1615 tasklet_disable(&local
->tasklet
);
1617 skb_queue_head_init(&local
->skb_queue
);
1618 skb_queue_head_init(&local
->skb_queue_unreliable
);
1620 return local_to_hw(local
);
1622 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1624 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1626 struct ieee80211_local
*local
= hw_to_local(hw
);
1629 enum ieee80211_band band
;
1630 struct net_device
*mdev
;
1631 struct ieee80211_sub_if_data
*sdata
;
1634 * generic code guarantees at least one band,
1635 * set this very early because much code assumes
1636 * that hw.conf.channel is assigned
1638 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1639 struct ieee80211_supported_band
*sband
;
1641 sband
= local
->hw
.wiphy
->bands
[band
];
1643 /* init channel we're on */
1644 local
->hw
.conf
.channel
=
1645 local
->oper_channel
=
1646 local
->scan_channel
= &sband
->channels
[0];
1651 result
= wiphy_register(local
->hw
.wiphy
);
1655 /* for now, mdev needs sub_if_data :/ */
1656 mdev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
),
1657 "wmaster%d", ether_setup
);
1659 goto fail_mdev_alloc
;
1661 sdata
= IEEE80211_DEV_TO_SUB_IF(mdev
);
1662 mdev
->ieee80211_ptr
= &sdata
->wdev
;
1663 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1667 ieee80211_rx_bss_list_init(mdev
);
1669 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
1670 mdev
->open
= ieee80211_master_open
;
1671 mdev
->stop
= ieee80211_master_stop
;
1672 mdev
->type
= ARPHRD_IEEE80211
;
1673 mdev
->header_ops
= &ieee80211_header_ops
;
1674 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
1676 sdata
->vif
.type
= IEEE80211_IF_TYPE_AP
;
1678 sdata
->local
= local
;
1679 sdata
->u
.ap
.force_unicast_rateidx
= -1;
1680 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
1681 ieee80211_if_sdata_init(sdata
);
1683 /* no RCU needed since we're still during init phase */
1684 list_add_tail(&sdata
->list
, &local
->interfaces
);
1686 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1687 local
->hw
.workqueue
= create_singlethread_workqueue(name
);
1688 if (!local
->hw
.workqueue
) {
1690 goto fail_workqueue
;
1694 * The hardware needs headroom for sending the frame,
1695 * and we need some headroom for passing the frame to monitor
1696 * interfaces, but never both at the same time.
1698 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1699 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1701 debugfs_hw_add(local
);
1703 local
->hw
.conf
.beacon_int
= 1000;
1705 local
->wstats_flags
|= local
->hw
.max_rssi
?
1706 IW_QUAL_LEVEL_UPDATED
: IW_QUAL_LEVEL_INVALID
;
1707 local
->wstats_flags
|= local
->hw
.max_signal
?
1708 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1709 local
->wstats_flags
|= local
->hw
.max_noise
?
1710 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1711 if (local
->hw
.max_rssi
< 0 || local
->hw
.max_noise
< 0)
1712 local
->wstats_flags
|= IW_QUAL_DBM
;
1714 result
= sta_info_start(local
);
1719 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1723 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1724 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1726 result
= register_netdevice(local
->mdev
);
1730 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1731 ieee80211_if_set_type(local
->mdev
, IEEE80211_IF_TYPE_AP
);
1733 result
= ieee80211_init_rate_ctrl_alg(local
,
1734 hw
->rate_control_algorithm
);
1736 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1737 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1741 result
= ieee80211_wep_init(local
);
1744 printk(KERN_DEBUG
"%s: Failed to initialize wep\n",
1745 wiphy_name(local
->hw
.wiphy
));
1749 ieee80211_install_qdisc(local
->mdev
);
1751 /* add one default STA interface */
1752 result
= ieee80211_if_add(local
->mdev
, "wlan%d", NULL
,
1753 IEEE80211_IF_TYPE_STA
, NULL
);
1755 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1756 wiphy_name(local
->hw
.wiphy
));
1758 local
->reg_state
= IEEE80211_DEV_REGISTERED
;
1761 ieee80211_led_init(local
);
1766 rate_control_deinitialize(local
);
1768 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1769 unregister_netdevice(local
->mdev
);
1773 sta_info_stop(local
);
1775 debugfs_hw_del(local
);
1776 destroy_workqueue(local
->hw
.workqueue
);
1778 if (local
->mdev
!= NULL
) {
1779 ieee80211_if_free(local
->mdev
);
1783 wiphy_unregister(local
->hw
.wiphy
);
1786 EXPORT_SYMBOL(ieee80211_register_hw
);
1788 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1790 struct ieee80211_local
*local
= hw_to_local(hw
);
1791 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1793 tasklet_kill(&local
->tx_pending_tasklet
);
1794 tasklet_kill(&local
->tasklet
);
1798 BUG_ON(local
->reg_state
!= IEEE80211_DEV_REGISTERED
);
1800 local
->reg_state
= IEEE80211_DEV_UNREGISTERED
;
1803 * At this point, interface list manipulations are fine
1804 * because the driver cannot be handing us frames any
1805 * more and the tasklet is killed.
1809 * First, we remove all non-master interfaces. Do this because they
1810 * may have bss pointer dependency on the master, and when we free
1811 * the master these would be freed as well, breaking our list
1812 * iteration completely.
1814 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1815 if (sdata
->dev
== local
->mdev
)
1817 list_del(&sdata
->list
);
1818 __ieee80211_if_del(local
, sdata
);
1821 /* then, finally, remove the master interface */
1822 __ieee80211_if_del(local
, IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1826 ieee80211_rx_bss_list_deinit(local
->mdev
);
1827 ieee80211_clear_tx_pending(local
);
1828 sta_info_stop(local
);
1829 rate_control_deinitialize(local
);
1830 debugfs_hw_del(local
);
1832 if (skb_queue_len(&local
->skb_queue
)
1833 || skb_queue_len(&local
->skb_queue_unreliable
))
1834 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1835 wiphy_name(local
->hw
.wiphy
));
1836 skb_queue_purge(&local
->skb_queue
);
1837 skb_queue_purge(&local
->skb_queue_unreliable
);
1839 destroy_workqueue(local
->hw
.workqueue
);
1840 wiphy_unregister(local
->hw
.wiphy
);
1841 ieee80211_wep_free(local
);
1842 ieee80211_led_exit(local
);
1843 ieee80211_if_free(local
->mdev
);
1846 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1848 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1850 struct ieee80211_local
*local
= hw_to_local(hw
);
1852 wiphy_free(local
->hw
.wiphy
);
1854 EXPORT_SYMBOL(ieee80211_free_hw
);
1856 static int __init
ieee80211_init(void)
1858 struct sk_buff
*skb
;
1861 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data
) > sizeof(skb
->cb
));
1863 ret
= rc80211_pid_init();
1867 ret
= ieee80211_wme_register();
1869 printk(KERN_DEBUG
"ieee80211_init: failed to "
1870 "initialize WME (err=%d)\n", ret
);
1871 goto out_cleanup_pid
;
1874 ieee80211_debugfs_netdev_init();
1884 static void __exit
ieee80211_exit(void)
1889 * For key todo, it'll be empty by now but the work
1890 * might still be scheduled.
1892 flush_scheduled_work();
1897 ieee80211_wme_unregister();
1898 ieee80211_debugfs_netdev_exit();
1902 subsys_initcall(ieee80211_init
);
1903 module_exit(ieee80211_exit
);
1905 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1906 MODULE_LICENSE("GPL");