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_zero_ether_addr(sdata
->u
.wds
.remote_addr
))
261 /* Create STA entry for the WDS peer */
262 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
267 sta
->flags
|= WLAN_STA_AUTHORIZED
;
269 res
= sta_info_insert(sta
);
271 /* STA has been freed */
275 case IEEE80211_IF_TYPE_VLAN
:
276 if (!sdata
->u
.vlan
.ap
)
279 case IEEE80211_IF_TYPE_AP
:
280 case IEEE80211_IF_TYPE_STA
:
281 case IEEE80211_IF_TYPE_MNTR
:
282 case IEEE80211_IF_TYPE_IBSS
:
283 case IEEE80211_IF_TYPE_MESH_POINT
:
284 /* no special treatment */
286 case IEEE80211_IF_TYPE_INVALID
:
292 if (local
->open_count
== 0) {
294 if (local
->ops
->start
)
295 res
= local
->ops
->start(local_to_hw(local
));
298 need_hw_reconfig
= 1;
299 ieee80211_led_radio(local
, local
->hw
.conf
.radio_enabled
);
302 switch (sdata
->vif
.type
) {
303 case IEEE80211_IF_TYPE_VLAN
:
304 list_add(&sdata
->u
.vlan
.list
, &sdata
->u
.vlan
.ap
->u
.ap
.vlans
);
305 /* no need to tell driver */
307 case IEEE80211_IF_TYPE_MNTR
:
308 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
309 local
->cooked_mntrs
++;
313 /* must be before the call to ieee80211_configure_filter */
315 if (local
->monitors
== 1)
316 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
318 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
319 local
->fif_fcsfail
++;
320 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
321 local
->fif_plcpfail
++;
322 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
323 local
->fif_control
++;
324 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
325 local
->fif_other_bss
++;
327 netif_tx_lock_bh(local
->mdev
);
328 ieee80211_configure_filter(local
);
329 netif_tx_unlock_bh(local
->mdev
);
331 case IEEE80211_IF_TYPE_STA
:
332 case IEEE80211_IF_TYPE_IBSS
:
333 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
336 conf
.vif
= &sdata
->vif
;
337 conf
.type
= sdata
->vif
.type
;
338 conf
.mac_addr
= dev
->dev_addr
;
339 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
340 if (res
&& !local
->open_count
&& local
->ops
->stop
)
341 local
->ops
->stop(local_to_hw(local
));
345 ieee80211_if_config(dev
);
346 ieee80211_reset_erp_info(dev
);
347 ieee80211_enable_keys(sdata
);
349 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
&&
350 !(sdata
->flags
& IEEE80211_SDATA_USERSPACE_MLME
))
351 netif_carrier_off(dev
);
353 netif_carrier_on(dev
);
356 if (local
->open_count
== 0) {
357 res
= dev_open(local
->mdev
);
359 tasklet_enable(&local
->tx_pending_tasklet
);
360 tasklet_enable(&local
->tasklet
);
364 * set_multicast_list will be invoked by the networking core
365 * which will check whether any increments here were done in
366 * error and sync them down to the hardware as filter flags.
368 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
369 atomic_inc(&local
->iff_allmultis
);
371 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
372 atomic_inc(&local
->iff_promiscs
);
375 if (need_hw_reconfig
)
376 ieee80211_hw_config(local
);
379 * ieee80211_sta_work is disabled while network interface
380 * is down. Therefore, some configuration changes may not
381 * yet be effective. Trigger execution of ieee80211_sta_work
384 if(sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
385 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
386 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
387 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
390 netif_start_queue(dev
);
395 static int ieee80211_stop(struct net_device
*dev
)
397 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
398 struct ieee80211_local
*local
= sdata
->local
;
399 struct ieee80211_if_init_conf conf
;
400 struct sta_info
*sta
;
403 * Stop TX on this interface first.
405 netif_stop_queue(dev
);
408 * Now delete all active aggregation sessions.
412 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
413 if (sta
->sdata
== sdata
)
414 ieee80211_sta_tear_down_BA_sessions(dev
, sta
->addr
);
420 * Remove all stations associated with this interface.
422 * This must be done before calling ops->remove_interface()
423 * because otherwise we can later invoke ops->sta_notify()
424 * whenever the STAs are removed, and that invalidates driver
425 * assumptions about always getting a vif pointer that is valid
426 * (because if we remove a STA after ops->remove_interface()
427 * the driver will have removed the vif info already!)
429 * We could relax this and only unlink the stations from the
430 * hash table and list but keep them on a per-sdata list that
431 * will be inserted back again when the interface is brought
432 * up again, but I don't currently see a use case for that,
433 * except with WDS which gets a STA entry created when it is
436 sta_info_flush(local
, sdata
);
439 * Don't count this interface for promisc/allmulti while it
440 * is down. dev_mc_unsync() will invoke set_multicast_list
441 * on the master interface which will sync these down to the
442 * hardware as filter flags.
444 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
445 atomic_dec(&local
->iff_allmultis
);
447 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
448 atomic_dec(&local
->iff_promiscs
);
450 dev_mc_unsync(local
->mdev
, dev
);
452 /* APs need special treatment */
453 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
454 struct ieee80211_sub_if_data
*vlan
, *tmp
;
455 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
458 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
462 /* down all dependent devices, that is VLANs */
463 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
465 dev_close(vlan
->dev
);
466 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
471 switch (sdata
->vif
.type
) {
472 case IEEE80211_IF_TYPE_VLAN
:
473 list_del(&sdata
->u
.vlan
.list
);
474 sdata
->u
.vlan
.ap
= NULL
;
475 /* no need to tell driver */
477 case IEEE80211_IF_TYPE_MNTR
:
478 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
479 local
->cooked_mntrs
--;
484 if (local
->monitors
== 0)
485 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
487 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
488 local
->fif_fcsfail
--;
489 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
490 local
->fif_plcpfail
--;
491 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
492 local
->fif_control
--;
493 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
494 local
->fif_other_bss
--;
496 netif_tx_lock_bh(local
->mdev
);
497 ieee80211_configure_filter(local
);
498 netif_tx_unlock_bh(local
->mdev
);
500 case IEEE80211_IF_TYPE_MESH_POINT
:
501 case IEEE80211_IF_TYPE_STA
:
502 case IEEE80211_IF_TYPE_IBSS
:
503 sdata
->u
.sta
.state
= IEEE80211_DISABLED
;
504 del_timer_sync(&sdata
->u
.sta
.timer
);
506 * When we get here, the interface is marked down.
507 * Call synchronize_rcu() to wait for the RX path
508 * should it be using the interface and enqueuing
509 * frames at this very time on another CPU.
512 skb_queue_purge(&sdata
->u
.sta
.skb_queue
);
514 if (local
->scan_dev
== sdata
->dev
) {
515 if (!local
->ops
->hw_scan
) {
516 local
->sta_sw_scanning
= 0;
517 cancel_delayed_work(&local
->scan_work
);
519 local
->sta_hw_scanning
= 0;
522 flush_workqueue(local
->hw
.workqueue
);
524 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PRIVACY_INVOKED
;
525 kfree(sdata
->u
.sta
.extra_ie
);
526 sdata
->u
.sta
.extra_ie
= NULL
;
527 sdata
->u
.sta
.extra_ie_len
= 0;
530 conf
.vif
= &sdata
->vif
;
531 conf
.type
= sdata
->vif
.type
;
532 conf
.mac_addr
= dev
->dev_addr
;
533 /* disable all keys for as long as this netdev is down */
534 ieee80211_disable_keys(sdata
);
535 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
538 if (local
->open_count
== 0) {
539 if (netif_running(local
->mdev
))
540 dev_close(local
->mdev
);
542 if (local
->ops
->stop
)
543 local
->ops
->stop(local_to_hw(local
));
545 ieee80211_led_radio(local
, 0);
547 tasklet_disable(&local
->tx_pending_tasklet
);
548 tasklet_disable(&local
->tasklet
);
554 int ieee80211_start_tx_ba_session(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
556 struct ieee80211_local
*local
= hw_to_local(hw
);
557 struct sta_info
*sta
;
558 struct ieee80211_sub_if_data
*sdata
;
559 u16 start_seq_num
= 0;
562 DECLARE_MAC_BUF(mac
);
564 if (tid
>= STA_TID_NUM
)
567 #ifdef CONFIG_MAC80211_HT_DEBUG
568 printk(KERN_DEBUG
"Open BA session requested for %s tid %u\n",
569 print_mac(mac
, ra
), tid
);
570 #endif /* CONFIG_MAC80211_HT_DEBUG */
574 sta
= sta_info_get(local
, ra
);
576 printk(KERN_DEBUG
"Could not find the station\n");
581 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
583 /* we have tried too many times, receiver does not want A-MPDU */
584 if (sta
->ampdu_mlme
.addba_req_num
[tid
] > HT_AGG_MAX_RETRIES
) {
589 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
590 /* check if the TID is not in aggregation flow already */
591 if (*state
!= HT_AGG_STATE_IDLE
) {
592 #ifdef CONFIG_MAC80211_HT_DEBUG
593 printk(KERN_DEBUG
"BA request denied - session is not "
594 "idle on tid %u\n", tid
);
595 #endif /* CONFIG_MAC80211_HT_DEBUG */
600 /* prepare A-MPDU MLME for Tx aggregation */
601 sta
->ampdu_mlme
.tid_tx
[tid
] =
602 kmalloc(sizeof(struct tid_ampdu_tx
), GFP_ATOMIC
);
603 if (!sta
->ampdu_mlme
.tid_tx
[tid
]) {
605 printk(KERN_ERR
"allocate tx mlme to tid %d failed\n",
611 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.function
=
612 sta_addba_resp_timer_expired
;
613 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.data
=
614 (unsigned long)&sta
->timer_to_tid
[tid
];
615 init_timer(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
617 /* ensure that TX flow won't interrupt us
618 * until the end of the call to requeue function */
619 spin_lock_bh(&local
->mdev
->queue_lock
);
621 /* create a new queue for this aggregation */
622 ret
= ieee80211_ht_agg_queue_add(local
, sta
, tid
);
624 /* case no queue is available to aggregation
625 * don't switch to aggregation */
627 #ifdef CONFIG_MAC80211_HT_DEBUG
628 printk(KERN_DEBUG
"BA request denied - queue unavailable for"
630 #endif /* CONFIG_MAC80211_HT_DEBUG */
635 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
636 * call back right away, it must see that the flow has begun */
637 *state
|= HT_ADDBA_REQUESTED_MSK
;
639 if (local
->ops
->ampdu_action
)
640 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_START
,
641 ra
, tid
, &start_seq_num
);
644 /* No need to requeue the packets in the agg queue, since we
645 * held the tx lock: no packet could be enqueued to the newly
647 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 0);
648 #ifdef CONFIG_MAC80211_HT_DEBUG
649 printk(KERN_DEBUG
"BA request denied - HW unavailable for"
651 #endif /* CONFIG_MAC80211_HT_DEBUG */
652 *state
= HT_AGG_STATE_IDLE
;
656 /* Will put all the packets in the new SW queue */
657 ieee80211_requeue(local
, ieee802_1d_to_ac
[tid
]);
658 spin_unlock_bh(&local
->mdev
->queue_lock
);
660 /* send an addBA request */
661 sta
->ampdu_mlme
.dialog_token_allocator
++;
662 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
=
663 sta
->ampdu_mlme
.dialog_token_allocator
;
664 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
= start_seq_num
;
666 ieee80211_send_addba_request(sta
->sdata
->dev
, ra
, tid
,
667 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
,
668 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
,
671 /* activate the timer for the recipient's addBA response */
672 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.expires
=
673 jiffies
+ ADDBA_RESP_INTERVAL
;
674 add_timer(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
675 printk(KERN_DEBUG
"activated addBA response timer on tid %d\n", tid
);
679 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
680 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
681 spin_unlock_bh(&local
->mdev
->queue_lock
);
684 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
688 EXPORT_SYMBOL(ieee80211_start_tx_ba_session
);
690 int ieee80211_stop_tx_ba_session(struct ieee80211_hw
*hw
,
692 enum ieee80211_back_parties initiator
)
694 struct ieee80211_local
*local
= hw_to_local(hw
);
695 struct sta_info
*sta
;
698 DECLARE_MAC_BUF(mac
);
700 if (tid
>= STA_TID_NUM
)
704 sta
= sta_info_get(local
, ra
);
710 /* check if the TID is in aggregation */
711 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
712 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
714 if (*state
!= HT_AGG_STATE_OPERATIONAL
) {
719 #ifdef CONFIG_MAC80211_HT_DEBUG
720 printk(KERN_DEBUG
"Tx BA session stop requested for %s tid %u\n",
721 print_mac(mac
, ra
), tid
);
722 #endif /* CONFIG_MAC80211_HT_DEBUG */
724 ieee80211_stop_queue(hw
, sta
->tid_to_tx_q
[tid
]);
726 *state
= HT_AGG_STATE_REQ_STOP_BA_MSK
|
727 (initiator
<< HT_AGG_STATE_INITIATOR_SHIFT
);
729 if (local
->ops
->ampdu_action
)
730 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_STOP
,
733 /* case HW denied going back to legacy */
735 WARN_ON(ret
!= -EBUSY
);
736 *state
= HT_AGG_STATE_OPERATIONAL
;
737 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
742 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
746 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session
);
748 void ieee80211_start_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
750 struct ieee80211_local
*local
= hw_to_local(hw
);
751 struct sta_info
*sta
;
753 DECLARE_MAC_BUF(mac
);
755 if (tid
>= STA_TID_NUM
) {
756 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
762 sta
= sta_info_get(local
, ra
);
765 printk(KERN_DEBUG
"Could not find station: %s\n",
770 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
771 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
773 if (!(*state
& HT_ADDBA_REQUESTED_MSK
)) {
774 printk(KERN_DEBUG
"addBA was not requested yet, state is %d\n",
776 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
781 WARN_ON_ONCE(*state
& HT_ADDBA_DRV_READY_MSK
);
783 *state
|= HT_ADDBA_DRV_READY_MSK
;
785 if (*state
== HT_AGG_STATE_OPERATIONAL
) {
786 printk(KERN_DEBUG
"Aggregation is on for tid %d \n", tid
);
787 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
789 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
792 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb
);
794 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u8 tid
)
796 struct ieee80211_local
*local
= hw_to_local(hw
);
797 struct sta_info
*sta
;
800 DECLARE_MAC_BUF(mac
);
802 if (tid
>= STA_TID_NUM
) {
803 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
808 #ifdef CONFIG_MAC80211_HT_DEBUG
809 printk(KERN_DEBUG
"Stopping Tx BA session for %s tid %d\n",
810 print_mac(mac
, ra
), tid
);
811 #endif /* CONFIG_MAC80211_HT_DEBUG */
814 sta
= sta_info_get(local
, ra
);
816 printk(KERN_DEBUG
"Could not find station: %s\n",
821 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
823 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
824 if ((*state
& HT_AGG_STATE_REQ_STOP_BA_MSK
) == 0) {
825 printk(KERN_DEBUG
"unexpected callback to A-MPDU stop\n");
826 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
831 if (*state
& HT_AGG_STATE_INITIATOR_MSK
)
832 ieee80211_send_delba(sta
->sdata
->dev
, ra
, tid
,
833 WLAN_BACK_INITIATOR
, WLAN_REASON_QSTA_NOT_USE
);
835 agg_queue
= sta
->tid_to_tx_q
[tid
];
837 /* avoid ordering issues: we are the only one that can modify
838 * the content of the qdiscs */
839 spin_lock_bh(&local
->mdev
->queue_lock
);
840 /* remove the queue for this aggregation */
841 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 1);
842 spin_unlock_bh(&local
->mdev
->queue_lock
);
844 /* we just requeued the all the frames that were in the removed
845 * queue, and since we might miss a softirq we do netif_schedule.
846 * ieee80211_wake_queue is not used here as this queue is not
847 * necessarily stopped */
848 netif_schedule(local
->mdev
);
849 *state
= HT_AGG_STATE_IDLE
;
850 sta
->ampdu_mlme
.addba_req_num
[tid
] = 0;
851 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
852 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
853 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
857 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb
);
859 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
860 const u8
*ra
, u16 tid
)
862 struct ieee80211_local
*local
= hw_to_local(hw
);
863 struct ieee80211_ra_tid
*ra_tid
;
864 struct sk_buff
*skb
= dev_alloc_skb(0);
866 if (unlikely(!skb
)) {
868 printk(KERN_WARNING
"%s: Not enough memory, "
869 "dropping start BA session", skb
->dev
->name
);
872 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
873 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
876 skb
->pkt_type
= IEEE80211_ADDBA_MSG
;
877 skb_queue_tail(&local
->skb_queue
, skb
);
878 tasklet_schedule(&local
->tasklet
);
880 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe
);
882 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
883 const u8
*ra
, u16 tid
)
885 struct ieee80211_local
*local
= hw_to_local(hw
);
886 struct ieee80211_ra_tid
*ra_tid
;
887 struct sk_buff
*skb
= dev_alloc_skb(0);
889 if (unlikely(!skb
)) {
891 printk(KERN_WARNING
"%s: Not enough memory, "
892 "dropping stop BA session", skb
->dev
->name
);
895 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
896 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
899 skb
->pkt_type
= IEEE80211_DELBA_MSG
;
900 skb_queue_tail(&local
->skb_queue
, skb
);
901 tasklet_schedule(&local
->tasklet
);
903 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe
);
905 static void ieee80211_set_multicast_list(struct net_device
*dev
)
907 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
908 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
909 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
911 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
912 promisc
= !!(dev
->flags
& IFF_PROMISC
);
913 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
914 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
916 if (allmulti
!= sdata_allmulti
) {
917 if (dev
->flags
& IFF_ALLMULTI
)
918 atomic_inc(&local
->iff_allmultis
);
920 atomic_dec(&local
->iff_allmultis
);
921 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
924 if (promisc
!= sdata_promisc
) {
925 if (dev
->flags
& IFF_PROMISC
)
926 atomic_inc(&local
->iff_promiscs
);
928 atomic_dec(&local
->iff_promiscs
);
929 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
932 dev_mc_sync(local
->mdev
, dev
);
935 static const struct header_ops ieee80211_header_ops
= {
936 .create
= eth_header
,
937 .parse
= header_parse_80211
,
938 .rebuild
= eth_rebuild_header
,
939 .cache
= eth_header_cache
,
940 .cache_update
= eth_header_cache_update
,
943 /* Must not be called for mdev */
944 void ieee80211_if_setup(struct net_device
*dev
)
947 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
948 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
949 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
950 dev
->change_mtu
= ieee80211_change_mtu
;
951 dev
->open
= ieee80211_open
;
952 dev
->stop
= ieee80211_stop
;
953 dev
->destructor
= ieee80211_if_free
;
956 /* everything else */
958 static int __ieee80211_if_config(struct net_device
*dev
,
959 struct sk_buff
*beacon
,
960 struct ieee80211_tx_control
*control
)
962 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
963 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
964 struct ieee80211_if_conf conf
;
966 if (!local
->ops
->config_interface
|| !netif_running(dev
))
969 memset(&conf
, 0, sizeof(conf
));
970 conf
.type
= sdata
->vif
.type
;
971 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
972 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
973 conf
.bssid
= sdata
->u
.sta
.bssid
;
974 conf
.ssid
= sdata
->u
.sta
.ssid
;
975 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
976 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
977 conf
.beacon
= beacon
;
978 conf
.beacon_control
= control
;
979 ieee80211_start_mesh(dev
);
980 } else if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
981 conf
.ssid
= sdata
->u
.ap
.ssid
;
982 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
983 conf
.beacon
= beacon
;
984 conf
.beacon_control
= control
;
986 return local
->ops
->config_interface(local_to_hw(local
),
990 int ieee80211_if_config(struct net_device
*dev
)
992 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
993 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
994 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MESH_POINT
&&
995 (local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
996 return ieee80211_if_config_beacon(dev
);
997 return __ieee80211_if_config(dev
, NULL
, NULL
);
1000 int ieee80211_if_config_beacon(struct net_device
*dev
)
1002 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1003 struct ieee80211_tx_control control
;
1004 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1005 struct sk_buff
*skb
;
1007 if (!(local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
1009 skb
= ieee80211_beacon_get(local_to_hw(local
), &sdata
->vif
,
1013 return __ieee80211_if_config(dev
, skb
, &control
);
1016 int ieee80211_hw_config(struct ieee80211_local
*local
)
1018 struct ieee80211_channel
*chan
;
1021 if (local
->sta_sw_scanning
)
1022 chan
= local
->scan_channel
;
1024 chan
= local
->oper_channel
;
1026 local
->hw
.conf
.channel
= chan
;
1028 if (!local
->hw
.conf
.power_level
)
1029 local
->hw
.conf
.power_level
= chan
->max_power
;
1031 local
->hw
.conf
.power_level
= min(chan
->max_power
,
1032 local
->hw
.conf
.power_level
);
1034 local
->hw
.conf
.max_antenna_gain
= chan
->max_antenna_gain
;
1036 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1037 printk(KERN_DEBUG
"%s: HW CONFIG: freq=%d\n",
1038 wiphy_name(local
->hw
.wiphy
), chan
->center_freq
);
1041 if (local
->open_count
)
1042 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
1048 * ieee80211_handle_ht should be used only after legacy configuration
1049 * has been determined namely band, as ht configuration depends upon
1050 * the hardware's HT abilities for a _specific_ band.
1052 u32
ieee80211_handle_ht(struct ieee80211_local
*local
, int enable_ht
,
1053 struct ieee80211_ht_info
*req_ht_cap
,
1054 struct ieee80211_ht_bss_info
*req_bss_cap
)
1056 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1057 struct ieee80211_supported_band
*sband
;
1058 struct ieee80211_ht_info ht_conf
;
1059 struct ieee80211_ht_bss_info ht_bss_conf
;
1063 sband
= local
->hw
.wiphy
->bands
[conf
->channel
->band
];
1065 /* HT is not supported */
1066 if (!sband
->ht_info
.ht_supported
) {
1067 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1071 memset(&ht_conf
, 0, sizeof(struct ieee80211_ht_info
));
1072 memset(&ht_bss_conf
, 0, sizeof(struct ieee80211_ht_bss_info
));
1075 if (!(conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
))
1076 changed
|= BSS_CHANGED_HT
;
1078 conf
->flags
|= IEEE80211_CONF_SUPPORT_HT_MODE
;
1079 ht_conf
.ht_supported
= 1;
1081 ht_conf
.cap
= req_ht_cap
->cap
& sband
->ht_info
.cap
;
1082 ht_conf
.cap
&= ~(IEEE80211_HT_CAP_MIMO_PS
);
1083 ht_conf
.cap
|= sband
->ht_info
.cap
& IEEE80211_HT_CAP_MIMO_PS
;
1085 for (i
= 0; i
< SUPP_MCS_SET_LEN
; i
++)
1086 ht_conf
.supp_mcs_set
[i
] =
1087 sband
->ht_info
.supp_mcs_set
[i
] &
1088 req_ht_cap
->supp_mcs_set
[i
];
1090 ht_bss_conf
.primary_channel
= req_bss_cap
->primary_channel
;
1091 ht_bss_conf
.bss_cap
= req_bss_cap
->bss_cap
;
1092 ht_bss_conf
.bss_op_mode
= req_bss_cap
->bss_op_mode
;
1094 ht_conf
.ampdu_factor
= req_ht_cap
->ampdu_factor
;
1095 ht_conf
.ampdu_density
= req_ht_cap
->ampdu_density
;
1097 /* if bss configuration changed store the new one */
1098 if (memcmp(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
)) ||
1099 memcmp(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
))) {
1100 changed
|= BSS_CHANGED_HT
;
1101 memcpy(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
));
1102 memcpy(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
));
1105 if (conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
)
1106 changed
|= BSS_CHANGED_HT
;
1107 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1113 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
1116 struct ieee80211_local
*local
= sdata
->local
;
1121 if (local
->ops
->bss_info_changed
)
1122 local
->ops
->bss_info_changed(local_to_hw(local
),
1128 void ieee80211_reset_erp_info(struct net_device
*dev
)
1130 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1132 sdata
->bss_conf
.use_cts_prot
= 0;
1133 sdata
->bss_conf
.use_short_preamble
= 0;
1134 ieee80211_bss_info_change_notify(sdata
,
1135 BSS_CHANGED_ERP_CTS_PROT
|
1136 BSS_CHANGED_ERP_PREAMBLE
);
1139 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
1140 struct sk_buff
*skb
,
1141 struct ieee80211_tx_status
*status
)
1143 struct ieee80211_local
*local
= hw_to_local(hw
);
1144 struct ieee80211_tx_status
*saved
;
1147 skb
->dev
= local
->mdev
;
1148 saved
= kmalloc(sizeof(struct ieee80211_tx_status
), GFP_ATOMIC
);
1149 if (unlikely(!saved
)) {
1150 if (net_ratelimit())
1151 printk(KERN_WARNING
"%s: Not enough memory, "
1152 "dropping tx status", skb
->dev
->name
);
1153 /* should be dev_kfree_skb_irq, but due to this function being
1154 * named _irqsafe instead of just _irq we can't be sure that
1155 * people won't call it from non-irq contexts */
1156 dev_kfree_skb_any(skb
);
1159 memcpy(saved
, status
, sizeof(struct ieee80211_tx_status
));
1160 /* copy pointer to saved status into skb->cb for use by tasklet */
1161 memcpy(skb
->cb
, &saved
, sizeof(saved
));
1163 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
1164 skb_queue_tail(status
->control
.flags
& IEEE80211_TXCTL_REQ_TX_STATUS
?
1165 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
1166 tmp
= skb_queue_len(&local
->skb_queue
) +
1167 skb_queue_len(&local
->skb_queue_unreliable
);
1168 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
1169 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1170 memcpy(&saved
, skb
->cb
, sizeof(saved
));
1172 dev_kfree_skb_irq(skb
);
1174 I802_DEBUG_INC(local
->tx_status_drop
);
1176 tasklet_schedule(&local
->tasklet
);
1178 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
1180 static void ieee80211_tasklet_handler(unsigned long data
)
1182 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
1183 struct sk_buff
*skb
;
1184 struct ieee80211_rx_status rx_status
;
1185 struct ieee80211_tx_status
*tx_status
;
1186 struct ieee80211_ra_tid
*ra_tid
;
1188 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
1189 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1190 switch (skb
->pkt_type
) {
1191 case IEEE80211_RX_MSG
:
1192 /* status is in skb->cb */
1193 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
1194 /* Clear skb->pkt_type in order to not confuse kernel
1197 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
1199 case IEEE80211_TX_STATUS_MSG
:
1200 /* get pointer to saved status out of skb->cb */
1201 memcpy(&tx_status
, skb
->cb
, sizeof(tx_status
));
1203 ieee80211_tx_status(local_to_hw(local
),
1207 case IEEE80211_DELBA_MSG
:
1208 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1209 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
1210 ra_tid
->ra
, ra_tid
->tid
);
1213 case IEEE80211_ADDBA_MSG
:
1214 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1215 ieee80211_start_tx_ba_cb(local_to_hw(local
),
1216 ra_tid
->ra
, ra_tid
->tid
);
1219 default: /* should never get here! */
1220 printk(KERN_ERR
"%s: Unknown message type (%d)\n",
1221 wiphy_name(local
->hw
.wiphy
), skb
->pkt_type
);
1228 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1229 * make a prepared TX frame (one that has been given to hw) to look like brand
1230 * new IEEE 802.11 frame that is ready to go through TX processing again.
1231 * Also, tx_packet_data in cb is restored from tx_control. */
1232 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
1233 struct ieee80211_key
*key
,
1234 struct sk_buff
*skb
,
1235 struct ieee80211_tx_control
*control
)
1237 int hdrlen
, iv_len
, mic_len
;
1238 struct ieee80211_tx_packet_data
*pkt_data
;
1240 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
1241 pkt_data
->ifindex
= vif_to_sdata(control
->vif
)->dev
->ifindex
;
1242 pkt_data
->flags
= 0;
1243 if (control
->flags
& IEEE80211_TXCTL_REQ_TX_STATUS
)
1244 pkt_data
->flags
|= IEEE80211_TXPD_REQ_TX_STATUS
;
1245 if (control
->flags
& IEEE80211_TXCTL_DO_NOT_ENCRYPT
)
1246 pkt_data
->flags
|= IEEE80211_TXPD_DO_NOT_ENCRYPT
;
1247 if (control
->flags
& IEEE80211_TXCTL_REQUEUE
)
1248 pkt_data
->flags
|= IEEE80211_TXPD_REQUEUE
;
1249 if (control
->flags
& IEEE80211_TXCTL_EAPOL_FRAME
)
1250 pkt_data
->flags
|= IEEE80211_TXPD_EAPOL_FRAME
;
1251 pkt_data
->queue
= control
->queue
;
1253 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1258 switch (key
->conf
.alg
) {
1260 iv_len
= WEP_IV_LEN
;
1261 mic_len
= WEP_ICV_LEN
;
1264 iv_len
= TKIP_IV_LEN
;
1265 mic_len
= TKIP_ICV_LEN
;
1268 iv_len
= CCMP_HDR_LEN
;
1269 mic_len
= CCMP_MIC_LEN
;
1275 if (skb
->len
>= mic_len
&&
1276 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
1277 skb_trim(skb
, skb
->len
- mic_len
);
1278 if (skb
->len
>= iv_len
&& skb
->len
> hdrlen
) {
1279 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
1280 skb_pull(skb
, iv_len
);
1285 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1286 u16 fc
= le16_to_cpu(hdr
->frame_control
);
1287 if ((fc
& 0x8C) == 0x88) /* QoS Control Field */ {
1288 fc
&= ~IEEE80211_STYPE_QOS_DATA
;
1289 hdr
->frame_control
= cpu_to_le16(fc
);
1290 memmove(skb
->data
+ 2, skb
->data
, hdrlen
- 2);
1296 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
1297 struct sta_info
*sta
,
1298 struct sk_buff
*skb
,
1299 struct ieee80211_tx_status
*status
)
1301 sta
->tx_filtered_count
++;
1304 * Clear the TX filter mask for this STA when sending the next
1305 * packet. If the STA went to power save mode, this will happen
1306 * happen when it wakes up for the next time.
1308 sta
->flags
|= WLAN_STA_CLEAR_PS_FILT
;
1311 * This code races in the following way:
1313 * (1) STA sends frame indicating it will go to sleep and does so
1314 * (2) hardware/firmware adds STA to filter list, passes frame up
1315 * (3) hardware/firmware processes TX fifo and suppresses a frame
1316 * (4) we get TX status before having processed the frame and
1317 * knowing that the STA has gone to sleep.
1319 * This is actually quite unlikely even when both those events are
1320 * processed from interrupts coming in quickly after one another or
1321 * even at the same time because we queue both TX status events and
1322 * RX frames to be processed by a tasklet and process them in the
1323 * same order that they were received or TX status last. Hence, there
1324 * is no race as long as the frame RX is processed before the next TX
1325 * status, which drivers can ensure, see below.
1327 * Note that this can only happen if the hardware or firmware can
1328 * actually add STAs to the filter list, if this is done by the
1329 * driver in response to set_tim() (which will only reduce the race
1330 * this whole filtering tries to solve, not completely solve it)
1331 * this situation cannot happen.
1333 * To completely solve this race drivers need to make sure that they
1334 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1336 * (b) always process RX events before TX status events if ordering
1337 * can be unknown, for example with different interrupt status
1340 if (sta
->flags
& WLAN_STA_PS
&&
1341 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
1342 ieee80211_remove_tx_extra(local
, sta
->key
, skb
,
1344 skb_queue_tail(&sta
->tx_filtered
, skb
);
1348 if (!(sta
->flags
& WLAN_STA_PS
) &&
1349 !(status
->control
.flags
& IEEE80211_TXCTL_REQUEUE
)) {
1350 /* Software retry the packet once */
1351 status
->control
.flags
|= IEEE80211_TXCTL_REQUEUE
;
1352 ieee80211_remove_tx_extra(local
, sta
->key
, skb
,
1354 dev_queue_xmit(skb
);
1358 if (net_ratelimit())
1359 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
1360 "queue_len=%d PS=%d @%lu\n",
1361 wiphy_name(local
->hw
.wiphy
),
1362 skb_queue_len(&sta
->tx_filtered
),
1363 !!(sta
->flags
& WLAN_STA_PS
), jiffies
);
1367 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
1368 struct ieee80211_tx_status
*status
)
1370 struct sk_buff
*skb2
;
1371 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1372 struct ieee80211_local
*local
= hw_to_local(hw
);
1374 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
1375 struct ieee80211_sub_if_data
*sdata
;
1376 struct net_device
*prev_dev
= NULL
;
1380 "%s: ieee80211_tx_status called with NULL status\n",
1381 wiphy_name(local
->hw
.wiphy
));
1388 if (status
->excessive_retries
) {
1389 struct sta_info
*sta
;
1390 sta
= sta_info_get(local
, hdr
->addr1
);
1392 if (sta
->flags
& WLAN_STA_PS
) {
1394 * The STA is in power save mode, so assume
1395 * that this TX packet failed because of that.
1397 status
->excessive_retries
= 0;
1398 status
->flags
|= IEEE80211_TX_STATUS_TX_FILTERED
;
1399 ieee80211_handle_filtered_frame(local
, sta
,
1407 if (status
->flags
& IEEE80211_TX_STATUS_TX_FILTERED
) {
1408 struct sta_info
*sta
;
1409 sta
= sta_info_get(local
, hdr
->addr1
);
1411 ieee80211_handle_filtered_frame(local
, sta
, skb
,
1417 rate_control_tx_status(local
->mdev
, skb
, status
);
1421 ieee80211_led_tx(local
, 0);
1424 * Fragments are passed to low-level drivers as separate skbs, so these
1425 * are actually fragments, not frames. Update frame counters only for
1426 * the first fragment of the frame. */
1428 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
1429 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
1431 if (status
->flags
& IEEE80211_TX_STATUS_ACK
) {
1433 local
->dot11TransmittedFrameCount
++;
1434 if (is_multicast_ether_addr(hdr
->addr1
))
1435 local
->dot11MulticastTransmittedFrameCount
++;
1436 if (status
->retry_count
> 0)
1437 local
->dot11RetryCount
++;
1438 if (status
->retry_count
> 1)
1439 local
->dot11MultipleRetryCount
++;
1442 /* This counter shall be incremented for an acknowledged MPDU
1443 * with an individual address in the address 1 field or an MPDU
1444 * with a multicast address in the address 1 field of type Data
1446 if (!is_multicast_ether_addr(hdr
->addr1
) ||
1447 type
== IEEE80211_FTYPE_DATA
||
1448 type
== IEEE80211_FTYPE_MGMT
)
1449 local
->dot11TransmittedFragmentCount
++;
1452 local
->dot11FailedCount
++;
1455 /* this was a transmitted frame, but now we want to reuse it */
1459 * This is a bit racy but we can avoid a lot of work
1462 if (!local
->monitors
&& !local
->cooked_mntrs
) {
1467 /* send frame to monitor interfaces now */
1469 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
1470 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
1475 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
1476 skb_push(skb
, sizeof(*rthdr
));
1478 memset(rthdr
, 0, sizeof(*rthdr
));
1479 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
1480 rthdr
->hdr
.it_present
=
1481 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
1482 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
1484 if (!(status
->flags
& IEEE80211_TX_STATUS_ACK
) &&
1485 !is_multicast_ether_addr(hdr
->addr1
))
1486 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
1488 if ((status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) &&
1489 (status
->control
.flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
))
1490 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
1491 else if (status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
)
1492 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
1494 rthdr
->data_retries
= status
->retry_count
;
1496 /* XXX: is this sufficient for BPF? */
1497 skb_set_mac_header(skb
, 0);
1498 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1499 skb
->pkt_type
= PACKET_OTHERHOST
;
1500 skb
->protocol
= htons(ETH_P_802_2
);
1501 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1504 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
1505 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MNTR
) {
1506 if (!netif_running(sdata
->dev
))
1510 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1512 skb2
->dev
= prev_dev
;
1517 prev_dev
= sdata
->dev
;
1521 skb
->dev
= prev_dev
;
1528 EXPORT_SYMBOL(ieee80211_tx_status
);
1530 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
1531 const struct ieee80211_ops
*ops
)
1533 struct ieee80211_local
*local
;
1535 struct wiphy
*wiphy
;
1537 /* Ensure 32-byte alignment of our private data and hw private data.
1538 * We use the wiphy priv data for both our ieee80211_local and for
1539 * the driver's private data
1541 * In memory it'll be like this:
1543 * +-------------------------+
1545 * +-------------------------+
1546 * | struct ieee80211_local |
1547 * +-------------------------+
1548 * | driver's private data |
1549 * +-------------------------+
1552 priv_size
= ((sizeof(struct ieee80211_local
) +
1553 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
1556 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
1561 wiphy
->privid
= mac80211_wiphy_privid
;
1563 local
= wiphy_priv(wiphy
);
1564 local
->hw
.wiphy
= wiphy
;
1566 local
->hw
.priv
= (char *)local
+
1567 ((sizeof(struct ieee80211_local
) +
1568 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
1571 BUG_ON(!ops
->start
);
1573 BUG_ON(!ops
->config
);
1574 BUG_ON(!ops
->add_interface
);
1575 BUG_ON(!ops
->remove_interface
);
1576 BUG_ON(!ops
->configure_filter
);
1579 local
->hw
.queues
= 1; /* default */
1581 local
->bridge_packets
= 1;
1583 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
1584 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
1585 local
->short_retry_limit
= 7;
1586 local
->long_retry_limit
= 4;
1587 local
->hw
.conf
.radio_enabled
= 1;
1589 INIT_LIST_HEAD(&local
->interfaces
);
1591 spin_lock_init(&local
->key_lock
);
1593 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
1595 sta_info_init(local
);
1597 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
1598 (unsigned long)local
);
1599 tasklet_disable(&local
->tx_pending_tasklet
);
1601 tasklet_init(&local
->tasklet
,
1602 ieee80211_tasklet_handler
,
1603 (unsigned long) local
);
1604 tasklet_disable(&local
->tasklet
);
1606 skb_queue_head_init(&local
->skb_queue
);
1607 skb_queue_head_init(&local
->skb_queue_unreliable
);
1609 return local_to_hw(local
);
1611 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1613 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1615 struct ieee80211_local
*local
= hw_to_local(hw
);
1618 enum ieee80211_band band
;
1619 struct net_device
*mdev
;
1620 struct ieee80211_sub_if_data
*sdata
;
1623 * generic code guarantees at least one band,
1624 * set this very early because much code assumes
1625 * that hw.conf.channel is assigned
1627 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1628 struct ieee80211_supported_band
*sband
;
1630 sband
= local
->hw
.wiphy
->bands
[band
];
1632 /* init channel we're on */
1633 local
->hw
.conf
.channel
=
1634 local
->oper_channel
=
1635 local
->scan_channel
= &sband
->channels
[0];
1640 result
= wiphy_register(local
->hw
.wiphy
);
1644 /* for now, mdev needs sub_if_data :/ */
1645 mdev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
),
1646 "wmaster%d", ether_setup
);
1648 goto fail_mdev_alloc
;
1650 sdata
= IEEE80211_DEV_TO_SUB_IF(mdev
);
1651 mdev
->ieee80211_ptr
= &sdata
->wdev
;
1652 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1656 ieee80211_rx_bss_list_init(mdev
);
1658 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
1659 mdev
->open
= ieee80211_master_open
;
1660 mdev
->stop
= ieee80211_master_stop
;
1661 mdev
->type
= ARPHRD_IEEE80211
;
1662 mdev
->header_ops
= &ieee80211_header_ops
;
1663 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
1665 sdata
->vif
.type
= IEEE80211_IF_TYPE_AP
;
1667 sdata
->local
= local
;
1668 sdata
->u
.ap
.force_unicast_rateidx
= -1;
1669 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
1670 ieee80211_if_sdata_init(sdata
);
1672 /* no RCU needed since we're still during init phase */
1673 list_add_tail(&sdata
->list
, &local
->interfaces
);
1675 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1676 local
->hw
.workqueue
= create_singlethread_workqueue(name
);
1677 if (!local
->hw
.workqueue
) {
1679 goto fail_workqueue
;
1683 * The hardware needs headroom for sending the frame,
1684 * and we need some headroom for passing the frame to monitor
1685 * interfaces, but never both at the same time.
1687 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1688 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1690 debugfs_hw_add(local
);
1692 local
->hw
.conf
.beacon_int
= 1000;
1694 local
->wstats_flags
|= local
->hw
.max_rssi
?
1695 IW_QUAL_LEVEL_UPDATED
: IW_QUAL_LEVEL_INVALID
;
1696 local
->wstats_flags
|= local
->hw
.max_signal
?
1697 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1698 local
->wstats_flags
|= local
->hw
.max_noise
?
1699 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1700 if (local
->hw
.max_rssi
< 0 || local
->hw
.max_noise
< 0)
1701 local
->wstats_flags
|= IW_QUAL_DBM
;
1703 result
= sta_info_start(local
);
1708 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1712 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1713 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1715 result
= register_netdevice(local
->mdev
);
1719 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1720 ieee80211_if_set_type(local
->mdev
, IEEE80211_IF_TYPE_AP
);
1722 result
= ieee80211_init_rate_ctrl_alg(local
,
1723 hw
->rate_control_algorithm
);
1725 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1726 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1730 result
= ieee80211_wep_init(local
);
1733 printk(KERN_DEBUG
"%s: Failed to initialize wep\n",
1734 wiphy_name(local
->hw
.wiphy
));
1738 ieee80211_install_qdisc(local
->mdev
);
1740 /* add one default STA interface */
1741 result
= ieee80211_if_add(local
->mdev
, "wlan%d", NULL
,
1742 IEEE80211_IF_TYPE_STA
, NULL
);
1744 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1745 wiphy_name(local
->hw
.wiphy
));
1747 local
->reg_state
= IEEE80211_DEV_REGISTERED
;
1750 ieee80211_led_init(local
);
1755 rate_control_deinitialize(local
);
1757 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1758 unregister_netdevice(local
->mdev
);
1761 sta_info_stop(local
);
1763 debugfs_hw_del(local
);
1764 destroy_workqueue(local
->hw
.workqueue
);
1766 ieee80211_if_free(local
->mdev
);
1769 wiphy_unregister(local
->hw
.wiphy
);
1772 EXPORT_SYMBOL(ieee80211_register_hw
);
1774 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1776 struct ieee80211_local
*local
= hw_to_local(hw
);
1777 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1779 tasklet_kill(&local
->tx_pending_tasklet
);
1780 tasklet_kill(&local
->tasklet
);
1784 BUG_ON(local
->reg_state
!= IEEE80211_DEV_REGISTERED
);
1786 local
->reg_state
= IEEE80211_DEV_UNREGISTERED
;
1789 * At this point, interface list manipulations are fine
1790 * because the driver cannot be handing us frames any
1791 * more and the tasklet is killed.
1795 * First, we remove all non-master interfaces. Do this because they
1796 * may have bss pointer dependency on the master, and when we free
1797 * the master these would be freed as well, breaking our list
1798 * iteration completely.
1800 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1801 if (sdata
->dev
== local
->mdev
)
1803 list_del(&sdata
->list
);
1804 __ieee80211_if_del(local
, sdata
);
1807 /* then, finally, remove the master interface */
1808 __ieee80211_if_del(local
, IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1812 ieee80211_rx_bss_list_deinit(local
->mdev
);
1813 ieee80211_clear_tx_pending(local
);
1814 sta_info_stop(local
);
1815 rate_control_deinitialize(local
);
1816 debugfs_hw_del(local
);
1818 if (skb_queue_len(&local
->skb_queue
)
1819 || skb_queue_len(&local
->skb_queue_unreliable
))
1820 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1821 wiphy_name(local
->hw
.wiphy
));
1822 skb_queue_purge(&local
->skb_queue
);
1823 skb_queue_purge(&local
->skb_queue_unreliable
);
1825 destroy_workqueue(local
->hw
.workqueue
);
1826 wiphy_unregister(local
->hw
.wiphy
);
1827 ieee80211_wep_free(local
);
1828 ieee80211_led_exit(local
);
1829 ieee80211_if_free(local
->mdev
);
1832 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1834 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1836 struct ieee80211_local
*local
= hw_to_local(hw
);
1838 wiphy_free(local
->hw
.wiphy
);
1840 EXPORT_SYMBOL(ieee80211_free_hw
);
1842 static int __init
ieee80211_init(void)
1844 struct sk_buff
*skb
;
1847 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data
) > sizeof(skb
->cb
));
1849 ret
= rc80211_pid_init();
1853 ret
= ieee80211_wme_register();
1855 printk(KERN_DEBUG
"ieee80211_init: failed to "
1856 "initialize WME (err=%d)\n", ret
);
1857 goto out_cleanup_pid
;
1860 ieee80211_debugfs_netdev_init();
1870 static void __exit
ieee80211_exit(void)
1875 * For key todo, it'll be empty by now but the work
1876 * might still be scheduled.
1878 flush_scheduled_work();
1883 ieee80211_wme_unregister();
1884 ieee80211_debugfs_netdev_exit();
1888 subsys_initcall(ieee80211_init
);
1889 module_exit(ieee80211_exit
);
1891 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1892 MODULE_LICENSE("GPL");