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 (sdata
->dev
!= dev
&& netif_running(sdata
->dev
)) {
117 netif_start_queue(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 (sdata
->dev
!= dev
&& 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
) {
155 printk(KERN_WARNING
"%s: invalid MTU %d\n",
160 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
161 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
162 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
167 static inline int identical_mac_addr_allowed(int type1
, int type2
)
169 return (type1
== IEEE80211_IF_TYPE_MNTR
||
170 type2
== IEEE80211_IF_TYPE_MNTR
||
171 (type1
== IEEE80211_IF_TYPE_AP
&&
172 type2
== IEEE80211_IF_TYPE_WDS
) ||
173 (type1
== IEEE80211_IF_TYPE_WDS
&&
174 (type2
== IEEE80211_IF_TYPE_WDS
||
175 type2
== IEEE80211_IF_TYPE_AP
)) ||
176 (type1
== IEEE80211_IF_TYPE_AP
&&
177 type2
== IEEE80211_IF_TYPE_VLAN
) ||
178 (type1
== IEEE80211_IF_TYPE_VLAN
&&
179 (type2
== IEEE80211_IF_TYPE_AP
||
180 type2
== IEEE80211_IF_TYPE_VLAN
)));
183 static int ieee80211_open(struct net_device
*dev
)
185 struct ieee80211_sub_if_data
*sdata
, *nsdata
;
186 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
187 struct ieee80211_if_init_conf conf
;
189 bool need_hw_reconfig
= 0;
190 struct sta_info
*sta
;
192 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
194 /* we hold the RTNL here so can safely walk the list */
195 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
196 struct net_device
*ndev
= nsdata
->dev
;
198 if (ndev
!= dev
&& ndev
!= local
->mdev
&& netif_running(ndev
)) {
200 * Allow only a single IBSS interface to be up at any
201 * time. This is restricted because beacon distribution
202 * cannot work properly if both are in the same IBSS.
204 * To remove this restriction we'd have to disallow them
205 * from setting the same SSID on different IBSS interfaces
206 * belonging to the same hardware. Then, however, we're
207 * faced with having to adopt two different TSF timers...
209 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
&&
210 nsdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
)
214 * Disallow multiple IBSS/STA mode interfaces.
216 * This is a technical restriction, it is possible although
217 * most likely not IEEE 802.11 compliant to have multiple
218 * STAs with just a single hardware (the TSF timer will not
219 * be adjusted properly.)
221 * However, because mac80211 uses the master device's BSS
222 * information for each STA/IBSS interface, doing this will
223 * currently corrupt that BSS information completely, unless,
224 * a not very useful case, both STAs are associated to the
227 * To remove this restriction, the BSS information needs to
228 * be embedded in the STA/IBSS mode sdata instead of using
229 * the master device's BSS structure.
231 if ((sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
232 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) &&
233 (nsdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
234 nsdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
))
238 * The remaining checks are only performed for interfaces
239 * with the same MAC address.
241 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
245 * check whether it may have the same address
247 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
252 * can only add VLANs to enabled APs
254 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_VLAN
&&
255 nsdata
->vif
.type
== IEEE80211_IF_TYPE_AP
)
256 sdata
->u
.vlan
.ap
= nsdata
;
260 switch (sdata
->vif
.type
) {
261 case IEEE80211_IF_TYPE_WDS
:
262 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
265 case IEEE80211_IF_TYPE_VLAN
:
266 if (!sdata
->u
.vlan
.ap
)
269 case IEEE80211_IF_TYPE_AP
:
270 case IEEE80211_IF_TYPE_STA
:
271 case IEEE80211_IF_TYPE_MNTR
:
272 case IEEE80211_IF_TYPE_IBSS
:
273 case IEEE80211_IF_TYPE_MESH_POINT
:
274 /* no special treatment */
276 case IEEE80211_IF_TYPE_INVALID
:
282 if (local
->open_count
== 0) {
284 if (local
->ops
->start
)
285 res
= local
->ops
->start(local_to_hw(local
));
288 need_hw_reconfig
= 1;
289 ieee80211_led_radio(local
, local
->hw
.conf
.radio_enabled
);
292 switch (sdata
->vif
.type
) {
293 case IEEE80211_IF_TYPE_VLAN
:
294 list_add(&sdata
->u
.vlan
.list
, &sdata
->u
.vlan
.ap
->u
.ap
.vlans
);
295 /* no need to tell driver */
297 case IEEE80211_IF_TYPE_MNTR
:
298 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
299 local
->cooked_mntrs
++;
303 /* must be before the call to ieee80211_configure_filter */
305 if (local
->monitors
== 1)
306 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
308 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
309 local
->fif_fcsfail
++;
310 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
311 local
->fif_plcpfail
++;
312 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
313 local
->fif_control
++;
314 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
315 local
->fif_other_bss
++;
317 netif_tx_lock_bh(local
->mdev
);
318 ieee80211_configure_filter(local
);
319 netif_tx_unlock_bh(local
->mdev
);
321 case IEEE80211_IF_TYPE_STA
:
322 case IEEE80211_IF_TYPE_IBSS
:
323 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
326 conf
.vif
= &sdata
->vif
;
327 conf
.type
= sdata
->vif
.type
;
328 conf
.mac_addr
= dev
->dev_addr
;
329 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
333 ieee80211_if_config(dev
);
334 ieee80211_reset_erp_info(dev
);
335 ieee80211_enable_keys(sdata
);
337 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
&&
338 !(sdata
->flags
& IEEE80211_SDATA_USERSPACE_MLME
))
339 netif_carrier_off(dev
);
341 netif_carrier_on(dev
);
344 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_WDS
) {
345 /* Create STA entry for the WDS peer */
346 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
350 goto err_del_interface
;
353 /* no locking required since STA is not live yet */
354 sta
->flags
|= WLAN_STA_AUTHORIZED
;
356 res
= sta_info_insert(sta
);
358 /* STA has been freed */
359 goto err_del_interface
;
363 if (local
->open_count
== 0) {
364 res
= dev_open(local
->mdev
);
367 goto err_del_interface
;
368 tasklet_enable(&local
->tx_pending_tasklet
);
369 tasklet_enable(&local
->tasklet
);
373 * set_multicast_list will be invoked by the networking core
374 * which will check whether any increments here were done in
375 * error and sync them down to the hardware as filter flags.
377 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
378 atomic_inc(&local
->iff_allmultis
);
380 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
381 atomic_inc(&local
->iff_promiscs
);
384 if (need_hw_reconfig
)
385 ieee80211_hw_config(local
);
388 * ieee80211_sta_work is disabled while network interface
389 * is down. Therefore, some configuration changes may not
390 * yet be effective. Trigger execution of ieee80211_sta_work
393 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
394 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
395 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
396 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
399 netif_start_queue(dev
);
403 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
405 if (!local
->open_count
&& local
->ops
->stop
)
406 local
->ops
->stop(local_to_hw(local
));
410 static int ieee80211_stop(struct net_device
*dev
)
412 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
413 struct ieee80211_local
*local
= sdata
->local
;
414 struct ieee80211_if_init_conf conf
;
415 struct sta_info
*sta
;
418 * Stop TX on this interface first.
420 netif_stop_queue(dev
);
423 * Now delete all active aggregation sessions.
427 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
428 if (sta
->sdata
== sdata
)
429 ieee80211_sta_tear_down_BA_sessions(dev
, sta
->addr
);
435 * Remove all stations associated with this interface.
437 * This must be done before calling ops->remove_interface()
438 * because otherwise we can later invoke ops->sta_notify()
439 * whenever the STAs are removed, and that invalidates driver
440 * assumptions about always getting a vif pointer that is valid
441 * (because if we remove a STA after ops->remove_interface()
442 * the driver will have removed the vif info already!)
444 * We could relax this and only unlink the stations from the
445 * hash table and list but keep them on a per-sdata list that
446 * will be inserted back again when the interface is brought
447 * up again, but I don't currently see a use case for that,
448 * except with WDS which gets a STA entry created when it is
451 sta_info_flush(local
, sdata
);
454 * Don't count this interface for promisc/allmulti while it
455 * is down. dev_mc_unsync() will invoke set_multicast_list
456 * on the master interface which will sync these down to the
457 * hardware as filter flags.
459 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
460 atomic_dec(&local
->iff_allmultis
);
462 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
463 atomic_dec(&local
->iff_promiscs
);
465 dev_mc_unsync(local
->mdev
, dev
);
467 /* APs need special treatment */
468 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
469 struct ieee80211_sub_if_data
*vlan
, *tmp
;
470 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
473 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
477 /* down all dependent devices, that is VLANs */
478 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
480 dev_close(vlan
->dev
);
481 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
486 switch (sdata
->vif
.type
) {
487 case IEEE80211_IF_TYPE_VLAN
:
488 list_del(&sdata
->u
.vlan
.list
);
489 sdata
->u
.vlan
.ap
= NULL
;
490 /* no need to tell driver */
492 case IEEE80211_IF_TYPE_MNTR
:
493 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
494 local
->cooked_mntrs
--;
499 if (local
->monitors
== 0)
500 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
502 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
503 local
->fif_fcsfail
--;
504 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
505 local
->fif_plcpfail
--;
506 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
507 local
->fif_control
--;
508 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
509 local
->fif_other_bss
--;
511 netif_tx_lock_bh(local
->mdev
);
512 ieee80211_configure_filter(local
);
513 netif_tx_unlock_bh(local
->mdev
);
515 case IEEE80211_IF_TYPE_MESH_POINT
:
516 case IEEE80211_IF_TYPE_STA
:
517 case IEEE80211_IF_TYPE_IBSS
:
518 sdata
->u
.sta
.state
= IEEE80211_DISABLED
;
519 del_timer_sync(&sdata
->u
.sta
.timer
);
521 * When we get here, the interface is marked down.
522 * Call synchronize_rcu() to wait for the RX path
523 * should it be using the interface and enqueuing
524 * frames at this very time on another CPU.
527 skb_queue_purge(&sdata
->u
.sta
.skb_queue
);
529 if (local
->scan_dev
== sdata
->dev
) {
530 if (!local
->ops
->hw_scan
) {
531 local
->sta_sw_scanning
= 0;
532 cancel_delayed_work(&local
->scan_work
);
534 local
->sta_hw_scanning
= 0;
537 flush_workqueue(local
->hw
.workqueue
);
539 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PRIVACY_INVOKED
;
540 kfree(sdata
->u
.sta
.extra_ie
);
541 sdata
->u
.sta
.extra_ie
= NULL
;
542 sdata
->u
.sta
.extra_ie_len
= 0;
545 conf
.vif
= &sdata
->vif
;
546 conf
.type
= sdata
->vif
.type
;
547 conf
.mac_addr
= dev
->dev_addr
;
548 /* disable all keys for as long as this netdev is down */
549 ieee80211_disable_keys(sdata
);
550 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
553 if (local
->open_count
== 0) {
554 if (netif_running(local
->mdev
))
555 dev_close(local
->mdev
);
557 if (local
->ops
->stop
)
558 local
->ops
->stop(local_to_hw(local
));
560 ieee80211_led_radio(local
, 0);
562 tasklet_disable(&local
->tx_pending_tasklet
);
563 tasklet_disable(&local
->tasklet
);
569 int ieee80211_start_tx_ba_session(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
571 struct ieee80211_local
*local
= hw_to_local(hw
);
572 struct sta_info
*sta
;
573 struct ieee80211_sub_if_data
*sdata
;
574 u16 start_seq_num
= 0;
577 DECLARE_MAC_BUF(mac
);
579 if (tid
>= STA_TID_NUM
)
582 #ifdef CONFIG_MAC80211_HT_DEBUG
583 printk(KERN_DEBUG
"Open BA session requested for %s tid %u\n",
584 print_mac(mac
, ra
), tid
);
585 #endif /* CONFIG_MAC80211_HT_DEBUG */
589 sta
= sta_info_get(local
, ra
);
591 printk(KERN_DEBUG
"Could not find the station\n");
596 spin_lock_bh(&sta
->lock
);
598 /* we have tried too many times, receiver does not want A-MPDU */
599 if (sta
->ampdu_mlme
.addba_req_num
[tid
] > HT_AGG_MAX_RETRIES
) {
604 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
605 /* check if the TID is not in aggregation flow already */
606 if (*state
!= HT_AGG_STATE_IDLE
) {
607 #ifdef CONFIG_MAC80211_HT_DEBUG
608 printk(KERN_DEBUG
"BA request denied - session is not "
609 "idle on tid %u\n", tid
);
610 #endif /* CONFIG_MAC80211_HT_DEBUG */
615 /* prepare A-MPDU MLME for Tx aggregation */
616 sta
->ampdu_mlme
.tid_tx
[tid
] =
617 kmalloc(sizeof(struct tid_ampdu_tx
), GFP_ATOMIC
);
618 if (!sta
->ampdu_mlme
.tid_tx
[tid
]) {
620 printk(KERN_ERR
"allocate tx mlme to tid %d failed\n",
626 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.function
=
627 sta_addba_resp_timer_expired
;
628 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.data
=
629 (unsigned long)&sta
->timer_to_tid
[tid
];
630 init_timer(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
632 /* ensure that TX flow won't interrupt us
633 * until the end of the call to requeue function */
634 spin_lock_bh(&local
->mdev
->queue_lock
);
636 /* create a new queue for this aggregation */
637 ret
= ieee80211_ht_agg_queue_add(local
, sta
, tid
);
639 /* case no queue is available to aggregation
640 * don't switch to aggregation */
642 #ifdef CONFIG_MAC80211_HT_DEBUG
643 printk(KERN_DEBUG
"BA request denied - queue unavailable for"
645 #endif /* CONFIG_MAC80211_HT_DEBUG */
646 goto err_unlock_queue
;
650 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
651 * call back right away, it must see that the flow has begun */
652 *state
|= HT_ADDBA_REQUESTED_MSK
;
654 if (local
->ops
->ampdu_action
)
655 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_START
,
656 ra
, tid
, &start_seq_num
);
659 /* No need to requeue the packets in the agg queue, since we
660 * held the tx lock: no packet could be enqueued to the newly
662 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 0);
663 #ifdef CONFIG_MAC80211_HT_DEBUG
664 printk(KERN_DEBUG
"BA request denied - HW unavailable for"
666 #endif /* CONFIG_MAC80211_HT_DEBUG */
667 *state
= HT_AGG_STATE_IDLE
;
668 goto err_unlock_queue
;
671 /* Will put all the packets in the new SW queue */
672 ieee80211_requeue(local
, ieee802_1d_to_ac
[tid
]);
673 spin_unlock_bh(&local
->mdev
->queue_lock
);
674 spin_unlock_bh(&sta
->lock
);
676 /* send an addBA request */
677 sta
->ampdu_mlme
.dialog_token_allocator
++;
678 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
=
679 sta
->ampdu_mlme
.dialog_token_allocator
;
680 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
= start_seq_num
;
683 ieee80211_send_addba_request(sta
->sdata
->dev
, ra
, tid
,
684 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
,
685 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
,
687 /* activate the timer for the recipient's addBA response */
688 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.expires
=
689 jiffies
+ ADDBA_RESP_INTERVAL
;
690 add_timer(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
691 printk(KERN_DEBUG
"activated addBA response timer on tid %d\n", tid
);
695 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
696 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
697 spin_unlock_bh(&local
->mdev
->queue_lock
);
700 spin_unlock_bh(&sta
->lock
);
705 EXPORT_SYMBOL(ieee80211_start_tx_ba_session
);
707 int ieee80211_stop_tx_ba_session(struct ieee80211_hw
*hw
,
709 enum ieee80211_back_parties initiator
)
711 struct ieee80211_local
*local
= hw_to_local(hw
);
712 struct sta_info
*sta
;
715 DECLARE_MAC_BUF(mac
);
717 if (tid
>= STA_TID_NUM
)
721 sta
= sta_info_get(local
, ra
);
727 /* check if the TID is in aggregation */
728 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
729 spin_lock_bh(&sta
->lock
);
731 if (*state
!= HT_AGG_STATE_OPERATIONAL
) {
736 #ifdef CONFIG_MAC80211_HT_DEBUG
737 printk(KERN_DEBUG
"Tx BA session stop requested for %s tid %u\n",
738 print_mac(mac
, ra
), tid
);
739 #endif /* CONFIG_MAC80211_HT_DEBUG */
741 ieee80211_stop_queue(hw
, sta
->tid_to_tx_q
[tid
]);
743 *state
= HT_AGG_STATE_REQ_STOP_BA_MSK
|
744 (initiator
<< HT_AGG_STATE_INITIATOR_SHIFT
);
746 if (local
->ops
->ampdu_action
)
747 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_STOP
,
750 /* case HW denied going back to legacy */
752 WARN_ON(ret
!= -EBUSY
);
753 *state
= HT_AGG_STATE_OPERATIONAL
;
754 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
759 spin_unlock_bh(&sta
->lock
);
763 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session
);
765 void ieee80211_start_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
767 struct ieee80211_local
*local
= hw_to_local(hw
);
768 struct sta_info
*sta
;
770 DECLARE_MAC_BUF(mac
);
772 if (tid
>= STA_TID_NUM
) {
773 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
779 sta
= sta_info_get(local
, ra
);
782 printk(KERN_DEBUG
"Could not find station: %s\n",
787 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
788 spin_lock_bh(&sta
->lock
);
790 if (!(*state
& HT_ADDBA_REQUESTED_MSK
)) {
791 printk(KERN_DEBUG
"addBA was not requested yet, state is %d\n",
793 spin_unlock_bh(&sta
->lock
);
798 WARN_ON_ONCE(*state
& HT_ADDBA_DRV_READY_MSK
);
800 *state
|= HT_ADDBA_DRV_READY_MSK
;
802 if (*state
== HT_AGG_STATE_OPERATIONAL
) {
803 printk(KERN_DEBUG
"Aggregation is on for tid %d \n", tid
);
804 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
806 spin_unlock_bh(&sta
->lock
);
809 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb
);
811 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u8 tid
)
813 struct ieee80211_local
*local
= hw_to_local(hw
);
814 struct sta_info
*sta
;
817 DECLARE_MAC_BUF(mac
);
819 if (tid
>= STA_TID_NUM
) {
820 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
825 #ifdef CONFIG_MAC80211_HT_DEBUG
826 printk(KERN_DEBUG
"Stopping Tx BA session for %s tid %d\n",
827 print_mac(mac
, ra
), tid
);
828 #endif /* CONFIG_MAC80211_HT_DEBUG */
831 sta
= sta_info_get(local
, ra
);
833 printk(KERN_DEBUG
"Could not find station: %s\n",
838 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
840 /* NOTE: no need to use sta->lock in this state check, as
841 * ieee80211_stop_tx_ba_session will let only
842 * one stop call to pass through per sta/tid */
843 if ((*state
& HT_AGG_STATE_REQ_STOP_BA_MSK
) == 0) {
844 printk(KERN_DEBUG
"unexpected callback to A-MPDU stop\n");
849 if (*state
& HT_AGG_STATE_INITIATOR_MSK
)
850 ieee80211_send_delba(sta
->sdata
->dev
, ra
, tid
,
851 WLAN_BACK_INITIATOR
, WLAN_REASON_QSTA_NOT_USE
);
853 agg_queue
= sta
->tid_to_tx_q
[tid
];
855 /* avoid ordering issues: we are the only one that can modify
856 * the content of the qdiscs */
857 spin_lock_bh(&local
->mdev
->queue_lock
);
858 /* remove the queue for this aggregation */
859 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 1);
860 spin_unlock_bh(&local
->mdev
->queue_lock
);
862 /* we just requeued the all the frames that were in the removed
863 * queue, and since we might miss a softirq we do netif_schedule.
864 * ieee80211_wake_queue is not used here as this queue is not
865 * necessarily stopped */
866 netif_schedule(local
->mdev
);
867 spin_lock_bh(&sta
->lock
);
868 *state
= HT_AGG_STATE_IDLE
;
869 sta
->ampdu_mlme
.addba_req_num
[tid
] = 0;
870 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
871 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
872 spin_unlock_bh(&sta
->lock
);
876 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb
);
878 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
879 const u8
*ra
, u16 tid
)
881 struct ieee80211_local
*local
= hw_to_local(hw
);
882 struct ieee80211_ra_tid
*ra_tid
;
883 struct sk_buff
*skb
= dev_alloc_skb(0);
885 if (unlikely(!skb
)) {
887 printk(KERN_WARNING
"%s: Not enough memory, "
888 "dropping start BA session", skb
->dev
->name
);
891 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
892 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
895 skb
->pkt_type
= IEEE80211_ADDBA_MSG
;
896 skb_queue_tail(&local
->skb_queue
, skb
);
897 tasklet_schedule(&local
->tasklet
);
899 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe
);
901 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
902 const u8
*ra
, u16 tid
)
904 struct ieee80211_local
*local
= hw_to_local(hw
);
905 struct ieee80211_ra_tid
*ra_tid
;
906 struct sk_buff
*skb
= dev_alloc_skb(0);
908 if (unlikely(!skb
)) {
910 printk(KERN_WARNING
"%s: Not enough memory, "
911 "dropping stop BA session", skb
->dev
->name
);
914 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
915 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
918 skb
->pkt_type
= IEEE80211_DELBA_MSG
;
919 skb_queue_tail(&local
->skb_queue
, skb
);
920 tasklet_schedule(&local
->tasklet
);
922 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe
);
924 static void ieee80211_set_multicast_list(struct net_device
*dev
)
926 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
927 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
928 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
930 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
931 promisc
= !!(dev
->flags
& IFF_PROMISC
);
932 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
933 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
935 if (allmulti
!= sdata_allmulti
) {
936 if (dev
->flags
& IFF_ALLMULTI
)
937 atomic_inc(&local
->iff_allmultis
);
939 atomic_dec(&local
->iff_allmultis
);
940 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
943 if (promisc
!= sdata_promisc
) {
944 if (dev
->flags
& IFF_PROMISC
)
945 atomic_inc(&local
->iff_promiscs
);
947 atomic_dec(&local
->iff_promiscs
);
948 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
951 dev_mc_sync(local
->mdev
, dev
);
954 static const struct header_ops ieee80211_header_ops
= {
955 .create
= eth_header
,
956 .parse
= header_parse_80211
,
957 .rebuild
= eth_rebuild_header
,
958 .cache
= eth_header_cache
,
959 .cache_update
= eth_header_cache_update
,
962 /* Must not be called for mdev */
963 void ieee80211_if_setup(struct net_device
*dev
)
966 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
967 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
968 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
969 dev
->change_mtu
= ieee80211_change_mtu
;
970 dev
->open
= ieee80211_open
;
971 dev
->stop
= ieee80211_stop
;
972 dev
->destructor
= ieee80211_if_free
;
975 /* everything else */
977 static int __ieee80211_if_config(struct net_device
*dev
,
978 struct sk_buff
*beacon
)
980 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
981 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
982 struct ieee80211_if_conf conf
;
984 if (!local
->ops
->config_interface
|| !netif_running(dev
))
987 memset(&conf
, 0, sizeof(conf
));
988 conf
.type
= sdata
->vif
.type
;
989 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
990 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
991 conf
.bssid
= sdata
->u
.sta
.bssid
;
992 conf
.ssid
= sdata
->u
.sta
.ssid
;
993 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
994 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
995 conf
.beacon
= beacon
;
996 ieee80211_start_mesh(dev
);
997 } else if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
998 conf
.ssid
= sdata
->u
.ap
.ssid
;
999 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
1000 conf
.beacon
= beacon
;
1002 return local
->ops
->config_interface(local_to_hw(local
),
1003 &sdata
->vif
, &conf
);
1006 int ieee80211_if_config(struct net_device
*dev
)
1008 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1009 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1010 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MESH_POINT
&&
1011 (local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
1012 return ieee80211_if_config_beacon(dev
);
1013 return __ieee80211_if_config(dev
, NULL
);
1016 int ieee80211_if_config_beacon(struct net_device
*dev
)
1018 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1019 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1020 struct sk_buff
*skb
;
1022 if (!(local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
1024 skb
= ieee80211_beacon_get(local_to_hw(local
), &sdata
->vif
);
1027 return __ieee80211_if_config(dev
, skb
);
1030 int ieee80211_hw_config(struct ieee80211_local
*local
)
1032 struct ieee80211_channel
*chan
;
1035 if (local
->sta_sw_scanning
)
1036 chan
= local
->scan_channel
;
1038 chan
= local
->oper_channel
;
1040 local
->hw
.conf
.channel
= chan
;
1042 if (!local
->hw
.conf
.power_level
)
1043 local
->hw
.conf
.power_level
= chan
->max_power
;
1045 local
->hw
.conf
.power_level
= min(chan
->max_power
,
1046 local
->hw
.conf
.power_level
);
1048 local
->hw
.conf
.max_antenna_gain
= chan
->max_antenna_gain
;
1050 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1051 printk(KERN_DEBUG
"%s: HW CONFIG: freq=%d\n",
1052 wiphy_name(local
->hw
.wiphy
), chan
->center_freq
);
1055 if (local
->open_count
)
1056 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
1062 * ieee80211_handle_ht should be used only after legacy configuration
1063 * has been determined namely band, as ht configuration depends upon
1064 * the hardware's HT abilities for a _specific_ band.
1066 u32
ieee80211_handle_ht(struct ieee80211_local
*local
, int enable_ht
,
1067 struct ieee80211_ht_info
*req_ht_cap
,
1068 struct ieee80211_ht_bss_info
*req_bss_cap
)
1070 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1071 struct ieee80211_supported_band
*sband
;
1072 struct ieee80211_ht_info ht_conf
;
1073 struct ieee80211_ht_bss_info ht_bss_conf
;
1076 u8 max_tx_streams
= IEEE80211_HT_CAP_MAX_STREAMS
;
1079 sband
= local
->hw
.wiphy
->bands
[conf
->channel
->band
];
1081 memset(&ht_conf
, 0, sizeof(struct ieee80211_ht_info
));
1082 memset(&ht_bss_conf
, 0, sizeof(struct ieee80211_ht_bss_info
));
1084 /* HT is not supported */
1085 if (!sband
->ht_info
.ht_supported
) {
1086 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1092 if (conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
)
1093 changed
|= BSS_CHANGED_HT
;
1094 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1095 conf
->ht_conf
.ht_supported
= 0;
1100 if (!(conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
))
1101 changed
|= BSS_CHANGED_HT
;
1103 conf
->flags
|= IEEE80211_CONF_SUPPORT_HT_MODE
;
1104 ht_conf
.ht_supported
= 1;
1106 ht_conf
.cap
= req_ht_cap
->cap
& sband
->ht_info
.cap
;
1107 ht_conf
.cap
&= ~(IEEE80211_HT_CAP_MIMO_PS
);
1108 ht_conf
.cap
|= sband
->ht_info
.cap
& IEEE80211_HT_CAP_MIMO_PS
;
1109 ht_bss_conf
.primary_channel
= req_bss_cap
->primary_channel
;
1110 ht_bss_conf
.bss_cap
= req_bss_cap
->bss_cap
;
1111 ht_bss_conf
.bss_op_mode
= req_bss_cap
->bss_op_mode
;
1113 ht_conf
.ampdu_factor
= req_ht_cap
->ampdu_factor
;
1114 ht_conf
.ampdu_density
= req_ht_cap
->ampdu_density
;
1117 tx_mcs_set_cap
= sband
->ht_info
.supp_mcs_set
[12];
1119 /* configure suppoerted Tx MCS according to requested MCS
1120 * (based in most cases on Rx capabilities of peer) and self
1121 * Tx MCS capabilities (as defined by low level driver HW
1122 * Tx capabilities) */
1123 if (!(tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_DEFINED
))
1126 /* Counting from 0 therfore + 1 */
1127 if (tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_RX_DIFF
)
1128 max_tx_streams
= ((tx_mcs_set_cap
&
1129 IEEE80211_HT_CAP_MCS_TX_STREAMS
) >> 2) + 1;
1131 for (i
= 0; i
< max_tx_streams
; i
++)
1132 ht_conf
.supp_mcs_set
[i
] =
1133 sband
->ht_info
.supp_mcs_set
[i
] &
1134 req_ht_cap
->supp_mcs_set
[i
];
1136 if (tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_UEQM
)
1137 for (i
= IEEE80211_SUPP_MCS_SET_UEQM
;
1138 i
< IEEE80211_SUPP_MCS_SET_LEN
; i
++)
1139 ht_conf
.supp_mcs_set
[i
] =
1140 sband
->ht_info
.supp_mcs_set
[i
] &
1141 req_ht_cap
->supp_mcs_set
[i
];
1144 /* if bss configuration changed store the new one */
1145 if (memcmp(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
)) ||
1146 memcmp(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
))) {
1147 changed
|= BSS_CHANGED_HT
;
1148 memcpy(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
));
1149 memcpy(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
));
1155 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
1158 struct ieee80211_local
*local
= sdata
->local
;
1163 if (local
->ops
->bss_info_changed
)
1164 local
->ops
->bss_info_changed(local_to_hw(local
),
1170 void ieee80211_reset_erp_info(struct net_device
*dev
)
1172 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1174 sdata
->bss_conf
.use_cts_prot
= 0;
1175 sdata
->bss_conf
.use_short_preamble
= 0;
1176 ieee80211_bss_info_change_notify(sdata
,
1177 BSS_CHANGED_ERP_CTS_PROT
|
1178 BSS_CHANGED_ERP_PREAMBLE
);
1181 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
1182 struct sk_buff
*skb
)
1184 struct ieee80211_local
*local
= hw_to_local(hw
);
1185 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1188 skb
->dev
= local
->mdev
;
1189 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
1190 skb_queue_tail(info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
?
1191 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
1192 tmp
= skb_queue_len(&local
->skb_queue
) +
1193 skb_queue_len(&local
->skb_queue_unreliable
);
1194 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
1195 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1196 dev_kfree_skb_irq(skb
);
1198 I802_DEBUG_INC(local
->tx_status_drop
);
1200 tasklet_schedule(&local
->tasklet
);
1202 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
1204 static void ieee80211_tasklet_handler(unsigned long data
)
1206 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
1207 struct sk_buff
*skb
;
1208 struct ieee80211_rx_status rx_status
;
1209 struct ieee80211_ra_tid
*ra_tid
;
1211 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
1212 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1213 switch (skb
->pkt_type
) {
1214 case IEEE80211_RX_MSG
:
1215 /* status is in skb->cb */
1216 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
1217 /* Clear skb->pkt_type in order to not confuse kernel
1220 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
1222 case IEEE80211_TX_STATUS_MSG
:
1224 ieee80211_tx_status(local_to_hw(local
), skb
);
1226 case IEEE80211_DELBA_MSG
:
1227 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1228 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
1229 ra_tid
->ra
, ra_tid
->tid
);
1232 case IEEE80211_ADDBA_MSG
:
1233 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1234 ieee80211_start_tx_ba_cb(local_to_hw(local
),
1235 ra_tid
->ra
, ra_tid
->tid
);
1238 default: /* should never get here! */
1239 printk(KERN_ERR
"%s: Unknown message type (%d)\n",
1240 wiphy_name(local
->hw
.wiphy
), skb
->pkt_type
);
1247 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1248 * make a prepared TX frame (one that has been given to hw) to look like brand
1249 * new IEEE 802.11 frame that is ready to go through TX processing again.
1250 * Also, tx_packet_data in cb is restored from tx_control. */
1251 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
1252 struct ieee80211_key
*key
,
1253 struct sk_buff
*skb
)
1255 int hdrlen
, iv_len
, mic_len
;
1256 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1258 info
->flags
&= IEEE80211_TX_CTL_REQ_TX_STATUS
|
1259 IEEE80211_TX_CTL_DO_NOT_ENCRYPT
|
1260 IEEE80211_TX_CTL_REQUEUE
|
1261 IEEE80211_TX_CTL_EAPOL_FRAME
;
1263 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1268 switch (key
->conf
.alg
) {
1270 iv_len
= WEP_IV_LEN
;
1271 mic_len
= WEP_ICV_LEN
;
1274 iv_len
= TKIP_IV_LEN
;
1275 mic_len
= TKIP_ICV_LEN
;
1278 iv_len
= CCMP_HDR_LEN
;
1279 mic_len
= CCMP_MIC_LEN
;
1285 if (skb
->len
>= mic_len
&&
1286 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
1287 skb_trim(skb
, skb
->len
- mic_len
);
1288 if (skb
->len
>= iv_len
&& skb
->len
> hdrlen
) {
1289 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
1290 skb_pull(skb
, iv_len
);
1295 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1296 u16 fc
= le16_to_cpu(hdr
->frame_control
);
1297 if ((fc
& 0x8C) == 0x88) /* QoS Control Field */ {
1298 fc
&= ~IEEE80211_STYPE_QOS_DATA
;
1299 hdr
->frame_control
= cpu_to_le16(fc
);
1300 memmove(skb
->data
+ 2, skb
->data
, hdrlen
- 2);
1306 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
1307 struct sta_info
*sta
,
1308 struct sk_buff
*skb
)
1310 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
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 * happen when it wakes up for the next time.
1319 set_sta_flags(sta
, 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 (test_sta_flags(sta
, WLAN_STA_PS
) &&
1352 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
1353 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
1354 skb_queue_tail(&sta
->tx_filtered
, skb
);
1358 if (!test_sta_flags(sta
, WLAN_STA_PS
) &&
1359 !(info
->flags
& IEEE80211_TX_CTL_REQUEUE
)) {
1360 /* Software retry the packet once */
1361 info
->flags
|= IEEE80211_TX_CTL_REQUEUE
;
1362 ieee80211_remove_tx_extra(local
, sta
->key
, skb
);
1363 dev_queue_xmit(skb
);
1367 if (net_ratelimit())
1368 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
1369 "queue_len=%d PS=%d @%lu\n",
1370 wiphy_name(local
->hw
.wiphy
),
1371 skb_queue_len(&sta
->tx_filtered
),
1372 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
1376 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
1378 struct sk_buff
*skb2
;
1379 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1380 struct ieee80211_local
*local
= hw_to_local(hw
);
1381 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1383 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
1384 struct ieee80211_sub_if_data
*sdata
;
1385 struct net_device
*prev_dev
= NULL
;
1389 if (info
->status
.excessive_retries
) {
1390 struct sta_info
*sta
;
1391 sta
= sta_info_get(local
, hdr
->addr1
);
1393 if (test_sta_flags(sta
, WLAN_STA_PS
)) {
1395 * The STA is in power save mode, so assume
1396 * that this TX packet failed because of that.
1398 ieee80211_handle_filtered_frame(local
, sta
, skb
);
1405 if (info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
) {
1406 struct sta_info
*sta
;
1407 sta
= sta_info_get(local
, hdr
->addr1
);
1409 ieee80211_handle_filtered_frame(local
, sta
, skb
);
1414 rate_control_tx_status(local
->mdev
, skb
);
1418 ieee80211_led_tx(local
, 0);
1421 * Fragments are passed to low-level drivers as separate skbs, so these
1422 * are actually fragments, not frames. Update frame counters only for
1423 * the first fragment of the frame. */
1425 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
1426 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
1428 if (info
->flags
& IEEE80211_TX_STAT_ACK
) {
1430 local
->dot11TransmittedFrameCount
++;
1431 if (is_multicast_ether_addr(hdr
->addr1
))
1432 local
->dot11MulticastTransmittedFrameCount
++;
1433 if (info
->status
.retry_count
> 0)
1434 local
->dot11RetryCount
++;
1435 if (info
->status
.retry_count
> 1)
1436 local
->dot11MultipleRetryCount
++;
1439 /* This counter shall be incremented for an acknowledged MPDU
1440 * with an individual address in the address 1 field or an MPDU
1441 * with a multicast address in the address 1 field of type Data
1443 if (!is_multicast_ether_addr(hdr
->addr1
) ||
1444 type
== IEEE80211_FTYPE_DATA
||
1445 type
== IEEE80211_FTYPE_MGMT
)
1446 local
->dot11TransmittedFragmentCount
++;
1449 local
->dot11FailedCount
++;
1452 /* this was a transmitted frame, but now we want to reuse it */
1456 * This is a bit racy but we can avoid a lot of work
1459 if (!local
->monitors
&& !local
->cooked_mntrs
) {
1464 /* send frame to monitor interfaces now */
1466 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
1467 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
1472 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
1473 skb_push(skb
, sizeof(*rthdr
));
1475 memset(rthdr
, 0, sizeof(*rthdr
));
1476 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
1477 rthdr
->hdr
.it_present
=
1478 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
1479 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
1481 if (!(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
1482 !is_multicast_ether_addr(hdr
->addr1
))
1483 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
1485 if ((info
->flags
& IEEE80211_TX_CTL_USE_RTS_CTS
) &&
1486 (info
->flags
& IEEE80211_TX_CTL_USE_CTS_PROTECT
))
1487 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
1488 else if (info
->flags
& IEEE80211_TX_CTL_USE_RTS_CTS
)
1489 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
1491 rthdr
->data_retries
= info
->status
.retry_count
;
1493 /* XXX: is this sufficient for BPF? */
1494 skb_set_mac_header(skb
, 0);
1495 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1496 skb
->pkt_type
= PACKET_OTHERHOST
;
1497 skb
->protocol
= htons(ETH_P_802_2
);
1498 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1501 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
1502 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MNTR
) {
1503 if (!netif_running(sdata
->dev
))
1507 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1509 skb2
->dev
= prev_dev
;
1514 prev_dev
= sdata
->dev
;
1518 skb
->dev
= prev_dev
;
1525 EXPORT_SYMBOL(ieee80211_tx_status
);
1527 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
1528 const struct ieee80211_ops
*ops
)
1530 struct ieee80211_local
*local
;
1532 struct wiphy
*wiphy
;
1534 /* Ensure 32-byte alignment of our private data and hw private data.
1535 * We use the wiphy priv data for both our ieee80211_local and for
1536 * the driver's private data
1538 * In memory it'll be like this:
1540 * +-------------------------+
1542 * +-------------------------+
1543 * | struct ieee80211_local |
1544 * +-------------------------+
1545 * | driver's private data |
1546 * +-------------------------+
1549 priv_size
= ((sizeof(struct ieee80211_local
) +
1550 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
1553 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
1558 wiphy
->privid
= mac80211_wiphy_privid
;
1560 local
= wiphy_priv(wiphy
);
1561 local
->hw
.wiphy
= wiphy
;
1563 local
->hw
.priv
= (char *)local
+
1564 ((sizeof(struct ieee80211_local
) +
1565 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
1568 BUG_ON(!ops
->start
);
1570 BUG_ON(!ops
->config
);
1571 BUG_ON(!ops
->add_interface
);
1572 BUG_ON(!ops
->remove_interface
);
1573 BUG_ON(!ops
->configure_filter
);
1576 local
->hw
.queues
= 1; /* default */
1578 local
->bridge_packets
= 1;
1580 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
1581 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
1582 local
->short_retry_limit
= 7;
1583 local
->long_retry_limit
= 4;
1584 local
->hw
.conf
.radio_enabled
= 1;
1586 INIT_LIST_HEAD(&local
->interfaces
);
1588 spin_lock_init(&local
->key_lock
);
1590 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
1592 sta_info_init(local
);
1594 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
1595 (unsigned long)local
);
1596 tasklet_disable(&local
->tx_pending_tasklet
);
1598 tasklet_init(&local
->tasklet
,
1599 ieee80211_tasklet_handler
,
1600 (unsigned long) local
);
1601 tasklet_disable(&local
->tasklet
);
1603 skb_queue_head_init(&local
->skb_queue
);
1604 skb_queue_head_init(&local
->skb_queue_unreliable
);
1606 return local_to_hw(local
);
1608 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1610 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1612 struct ieee80211_local
*local
= hw_to_local(hw
);
1615 enum ieee80211_band band
;
1616 struct net_device
*mdev
;
1617 struct ieee80211_sub_if_data
*sdata
;
1620 * generic code guarantees at least one band,
1621 * set this very early because much code assumes
1622 * that hw.conf.channel is assigned
1624 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1625 struct ieee80211_supported_band
*sband
;
1627 sband
= local
->hw
.wiphy
->bands
[band
];
1629 /* init channel we're on */
1630 local
->hw
.conf
.channel
=
1631 local
->oper_channel
=
1632 local
->scan_channel
= &sband
->channels
[0];
1637 result
= wiphy_register(local
->hw
.wiphy
);
1642 * We use the number of queues for feature tests (QoS, HT) internally
1643 * so restrict them appropriately.
1645 #ifdef CONFIG_MAC80211_QOS
1646 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
1647 hw
->queues
= IEEE80211_MAX_QUEUES
;
1648 if (hw
->ampdu_queues
> IEEE80211_MAX_AMPDU_QUEUES
)
1649 hw
->ampdu_queues
= IEEE80211_MAX_AMPDU_QUEUES
;
1651 hw
->ampdu_queues
= 0;
1654 hw
->ampdu_queues
= 0;
1657 /* for now, mdev needs sub_if_data :/ */
1658 mdev
= alloc_netdev_mq(sizeof(struct ieee80211_sub_if_data
),
1659 "wmaster%d", ether_setup
,
1660 ieee80211_num_queues(hw
));
1662 goto fail_mdev_alloc
;
1664 if (ieee80211_num_queues(hw
) > 1)
1665 mdev
->features
|= NETIF_F_MULTI_QUEUE
;
1667 sdata
= IEEE80211_DEV_TO_SUB_IF(mdev
);
1668 mdev
->ieee80211_ptr
= &sdata
->wdev
;
1669 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1673 ieee80211_rx_bss_list_init(mdev
);
1675 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
1676 mdev
->open
= ieee80211_master_open
;
1677 mdev
->stop
= ieee80211_master_stop
;
1678 mdev
->type
= ARPHRD_IEEE80211
;
1679 mdev
->header_ops
= &ieee80211_header_ops
;
1680 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
1682 sdata
->vif
.type
= IEEE80211_IF_TYPE_AP
;
1684 sdata
->local
= local
;
1685 sdata
->u
.ap
.force_unicast_rateidx
= -1;
1686 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
1687 ieee80211_if_sdata_init(sdata
);
1689 /* no RCU needed since we're still during init phase */
1690 list_add_tail(&sdata
->list
, &local
->interfaces
);
1692 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1693 local
->hw
.workqueue
= create_singlethread_workqueue(name
);
1694 if (!local
->hw
.workqueue
) {
1696 goto fail_workqueue
;
1700 * The hardware needs headroom for sending the frame,
1701 * and we need some headroom for passing the frame to monitor
1702 * interfaces, but never both at the same time.
1704 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1705 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1707 debugfs_hw_add(local
);
1709 local
->hw
.conf
.beacon_int
= 1000;
1711 local
->wstats_flags
|= local
->hw
.flags
& (IEEE80211_HW_SIGNAL_UNSPEC
|
1712 IEEE80211_HW_SIGNAL_DB
|
1713 IEEE80211_HW_SIGNAL_DBM
) ?
1714 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1715 local
->wstats_flags
|= local
->hw
.flags
& IEEE80211_HW_NOISE_DBM
?
1716 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1717 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
1718 local
->wstats_flags
|= IW_QUAL_DBM
;
1720 result
= sta_info_start(local
);
1725 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1729 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1730 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1732 result
= register_netdevice(local
->mdev
);
1736 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1737 ieee80211_if_set_type(local
->mdev
, IEEE80211_IF_TYPE_AP
);
1739 result
= ieee80211_init_rate_ctrl_alg(local
,
1740 hw
->rate_control_algorithm
);
1742 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1743 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1747 result
= ieee80211_wep_init(local
);
1750 printk(KERN_DEBUG
"%s: Failed to initialize wep\n",
1751 wiphy_name(local
->hw
.wiphy
));
1755 ieee80211_install_qdisc(local
->mdev
);
1757 /* add one default STA interface */
1758 result
= ieee80211_if_add(local
->mdev
, "wlan%d", NULL
,
1759 IEEE80211_IF_TYPE_STA
, NULL
);
1761 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1762 wiphy_name(local
->hw
.wiphy
));
1764 local
->reg_state
= IEEE80211_DEV_REGISTERED
;
1767 ieee80211_led_init(local
);
1772 rate_control_deinitialize(local
);
1774 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1775 unregister_netdevice(local
->mdev
);
1779 sta_info_stop(local
);
1781 debugfs_hw_del(local
);
1782 destroy_workqueue(local
->hw
.workqueue
);
1784 if (local
->mdev
!= NULL
) {
1785 ieee80211_if_free(local
->mdev
);
1789 wiphy_unregister(local
->hw
.wiphy
);
1792 EXPORT_SYMBOL(ieee80211_register_hw
);
1794 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1796 struct ieee80211_local
*local
= hw_to_local(hw
);
1797 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1799 tasklet_kill(&local
->tx_pending_tasklet
);
1800 tasklet_kill(&local
->tasklet
);
1804 BUG_ON(local
->reg_state
!= IEEE80211_DEV_REGISTERED
);
1806 local
->reg_state
= IEEE80211_DEV_UNREGISTERED
;
1809 * At this point, interface list manipulations are fine
1810 * because the driver cannot be handing us frames any
1811 * more and the tasklet is killed.
1815 * First, we remove all non-master interfaces. Do this because they
1816 * may have bss pointer dependency on the master, and when we free
1817 * the master these would be freed as well, breaking our list
1818 * iteration completely.
1820 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1821 if (sdata
->dev
== local
->mdev
)
1823 list_del(&sdata
->list
);
1824 __ieee80211_if_del(local
, sdata
);
1827 /* then, finally, remove the master interface */
1828 __ieee80211_if_del(local
, IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1832 ieee80211_rx_bss_list_deinit(local
->mdev
);
1833 ieee80211_clear_tx_pending(local
);
1834 sta_info_stop(local
);
1835 rate_control_deinitialize(local
);
1836 debugfs_hw_del(local
);
1838 if (skb_queue_len(&local
->skb_queue
)
1839 || skb_queue_len(&local
->skb_queue_unreliable
))
1840 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1841 wiphy_name(local
->hw
.wiphy
));
1842 skb_queue_purge(&local
->skb_queue
);
1843 skb_queue_purge(&local
->skb_queue_unreliable
);
1845 destroy_workqueue(local
->hw
.workqueue
);
1846 wiphy_unregister(local
->hw
.wiphy
);
1847 ieee80211_wep_free(local
);
1848 ieee80211_led_exit(local
);
1849 ieee80211_if_free(local
->mdev
);
1852 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1854 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1856 struct ieee80211_local
*local
= hw_to_local(hw
);
1858 wiphy_free(local
->hw
.wiphy
);
1860 EXPORT_SYMBOL(ieee80211_free_hw
);
1862 static int __init
ieee80211_init(void)
1864 struct sk_buff
*skb
;
1867 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1868 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1869 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1871 ret
= rc80211_pid_init();
1875 ret
= ieee80211_wme_register();
1877 printk(KERN_DEBUG
"ieee80211_init: failed to "
1878 "initialize WME (err=%d)\n", ret
);
1879 goto out_cleanup_pid
;
1882 ieee80211_debugfs_netdev_init();
1892 static void __exit
ieee80211_exit(void)
1897 * For key todo, it'll be empty by now but the work
1898 * might still be scheduled.
1900 flush_scheduled_work();
1905 ieee80211_wme_unregister();
1906 ieee80211_debugfs_netdev_exit();
1910 subsys_initcall(ieee80211_init
);
1911 module_exit(ieee80211_exit
);
1913 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1914 MODULE_LICENSE("GPL");