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 */
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
;
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
);
675 /* send an addBA request */
676 sta
->ampdu_mlme
.dialog_token_allocator
++;
677 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
=
678 sta
->ampdu_mlme
.dialog_token_allocator
;
679 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
= start_seq_num
;
681 ieee80211_send_addba_request(sta
->sdata
->dev
, ra
, tid
,
682 sta
->ampdu_mlme
.tid_tx
[tid
]->dialog_token
,
683 sta
->ampdu_mlme
.tid_tx
[tid
]->ssn
,
686 /* activate the timer for the recipient's addBA response */
687 sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
.expires
=
688 jiffies
+ ADDBA_RESP_INTERVAL
;
689 add_timer(&sta
->ampdu_mlme
.tid_tx
[tid
]->addba_resp_timer
);
690 printk(KERN_DEBUG
"activated addBA response timer on tid %d\n", tid
);
694 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
695 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
696 spin_unlock_bh(&local
->mdev
->queue_lock
);
699 spin_unlock_bh(&sta
->lock
);
703 EXPORT_SYMBOL(ieee80211_start_tx_ba_session
);
705 int ieee80211_stop_tx_ba_session(struct ieee80211_hw
*hw
,
707 enum ieee80211_back_parties initiator
)
709 struct ieee80211_local
*local
= hw_to_local(hw
);
710 struct sta_info
*sta
;
713 DECLARE_MAC_BUF(mac
);
715 if (tid
>= STA_TID_NUM
)
719 sta
= sta_info_get(local
, ra
);
725 /* check if the TID is in aggregation */
726 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
727 spin_lock_bh(&sta
->lock
);
729 if (*state
!= HT_AGG_STATE_OPERATIONAL
) {
734 #ifdef CONFIG_MAC80211_HT_DEBUG
735 printk(KERN_DEBUG
"Tx BA session stop requested for %s tid %u\n",
736 print_mac(mac
, ra
), tid
);
737 #endif /* CONFIG_MAC80211_HT_DEBUG */
739 ieee80211_stop_queue(hw
, sta
->tid_to_tx_q
[tid
]);
741 *state
= HT_AGG_STATE_REQ_STOP_BA_MSK
|
742 (initiator
<< HT_AGG_STATE_INITIATOR_SHIFT
);
744 if (local
->ops
->ampdu_action
)
745 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_STOP
,
748 /* case HW denied going back to legacy */
750 WARN_ON(ret
!= -EBUSY
);
751 *state
= HT_AGG_STATE_OPERATIONAL
;
752 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
757 spin_unlock_bh(&sta
->lock
);
761 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session
);
763 void ieee80211_start_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
765 struct ieee80211_local
*local
= hw_to_local(hw
);
766 struct sta_info
*sta
;
768 DECLARE_MAC_BUF(mac
);
770 if (tid
>= STA_TID_NUM
) {
771 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
777 sta
= sta_info_get(local
, ra
);
780 printk(KERN_DEBUG
"Could not find station: %s\n",
785 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
786 spin_lock_bh(&sta
->lock
);
788 if (!(*state
& HT_ADDBA_REQUESTED_MSK
)) {
789 printk(KERN_DEBUG
"addBA was not requested yet, state is %d\n",
791 spin_unlock_bh(&sta
->lock
);
796 WARN_ON_ONCE(*state
& HT_ADDBA_DRV_READY_MSK
);
798 *state
|= HT_ADDBA_DRV_READY_MSK
;
800 if (*state
== HT_AGG_STATE_OPERATIONAL
) {
801 printk(KERN_DEBUG
"Aggregation is on for tid %d \n", tid
);
802 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
804 spin_unlock_bh(&sta
->lock
);
807 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb
);
809 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u8 tid
)
811 struct ieee80211_local
*local
= hw_to_local(hw
);
812 struct sta_info
*sta
;
815 DECLARE_MAC_BUF(mac
);
817 if (tid
>= STA_TID_NUM
) {
818 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
823 #ifdef CONFIG_MAC80211_HT_DEBUG
824 printk(KERN_DEBUG
"Stopping Tx BA session for %s tid %d\n",
825 print_mac(mac
, ra
), tid
);
826 #endif /* CONFIG_MAC80211_HT_DEBUG */
829 sta
= sta_info_get(local
, ra
);
831 printk(KERN_DEBUG
"Could not find station: %s\n",
836 state
= &sta
->ampdu_mlme
.tid_state_tx
[tid
];
838 spin_lock_bh(&sta
->lock
);
839 if ((*state
& HT_AGG_STATE_REQ_STOP_BA_MSK
) == 0) {
840 printk(KERN_DEBUG
"unexpected callback to A-MPDU stop\n");
841 spin_unlock_bh(&sta
->lock
);
846 if (*state
& HT_AGG_STATE_INITIATOR_MSK
)
847 ieee80211_send_delba(sta
->sdata
->dev
, ra
, tid
,
848 WLAN_BACK_INITIATOR
, WLAN_REASON_QSTA_NOT_USE
);
850 agg_queue
= sta
->tid_to_tx_q
[tid
];
852 /* avoid ordering issues: we are the only one that can modify
853 * the content of the qdiscs */
854 spin_lock_bh(&local
->mdev
->queue_lock
);
855 /* remove the queue for this aggregation */
856 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 1);
857 spin_unlock_bh(&local
->mdev
->queue_lock
);
859 /* we just requeued the all the frames that were in the removed
860 * queue, and since we might miss a softirq we do netif_schedule.
861 * ieee80211_wake_queue is not used here as this queue is not
862 * necessarily stopped */
863 netif_schedule(local
->mdev
);
864 *state
= HT_AGG_STATE_IDLE
;
865 sta
->ampdu_mlme
.addba_req_num
[tid
] = 0;
866 kfree(sta
->ampdu_mlme
.tid_tx
[tid
]);
867 sta
->ampdu_mlme
.tid_tx
[tid
] = NULL
;
868 spin_unlock_bh(&sta
->lock
);
872 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb
);
874 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
875 const u8
*ra
, u16 tid
)
877 struct ieee80211_local
*local
= hw_to_local(hw
);
878 struct ieee80211_ra_tid
*ra_tid
;
879 struct sk_buff
*skb
= dev_alloc_skb(0);
881 if (unlikely(!skb
)) {
883 printk(KERN_WARNING
"%s: Not enough memory, "
884 "dropping start BA session", skb
->dev
->name
);
887 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
888 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
891 skb
->pkt_type
= IEEE80211_ADDBA_MSG
;
892 skb_queue_tail(&local
->skb_queue
, skb
);
893 tasklet_schedule(&local
->tasklet
);
895 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe
);
897 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
898 const u8
*ra
, u16 tid
)
900 struct ieee80211_local
*local
= hw_to_local(hw
);
901 struct ieee80211_ra_tid
*ra_tid
;
902 struct sk_buff
*skb
= dev_alloc_skb(0);
904 if (unlikely(!skb
)) {
906 printk(KERN_WARNING
"%s: Not enough memory, "
907 "dropping stop BA session", skb
->dev
->name
);
910 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
911 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
914 skb
->pkt_type
= IEEE80211_DELBA_MSG
;
915 skb_queue_tail(&local
->skb_queue
, skb
);
916 tasklet_schedule(&local
->tasklet
);
918 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe
);
920 static void ieee80211_set_multicast_list(struct net_device
*dev
)
922 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
923 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
924 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
926 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
927 promisc
= !!(dev
->flags
& IFF_PROMISC
);
928 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
929 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
931 if (allmulti
!= sdata_allmulti
) {
932 if (dev
->flags
& IFF_ALLMULTI
)
933 atomic_inc(&local
->iff_allmultis
);
935 atomic_dec(&local
->iff_allmultis
);
936 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
939 if (promisc
!= sdata_promisc
) {
940 if (dev
->flags
& IFF_PROMISC
)
941 atomic_inc(&local
->iff_promiscs
);
943 atomic_dec(&local
->iff_promiscs
);
944 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
947 dev_mc_sync(local
->mdev
, dev
);
950 static const struct header_ops ieee80211_header_ops
= {
951 .create
= eth_header
,
952 .parse
= header_parse_80211
,
953 .rebuild
= eth_rebuild_header
,
954 .cache
= eth_header_cache
,
955 .cache_update
= eth_header_cache_update
,
958 /* Must not be called for mdev */
959 void ieee80211_if_setup(struct net_device
*dev
)
962 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
963 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
964 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
965 dev
->change_mtu
= ieee80211_change_mtu
;
966 dev
->open
= ieee80211_open
;
967 dev
->stop
= ieee80211_stop
;
968 dev
->destructor
= ieee80211_if_free
;
971 /* everything else */
973 static int __ieee80211_if_config(struct net_device
*dev
,
974 struct sk_buff
*beacon
,
975 struct ieee80211_tx_control
*control
)
977 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
978 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
979 struct ieee80211_if_conf conf
;
981 if (!local
->ops
->config_interface
|| !netif_running(dev
))
984 memset(&conf
, 0, sizeof(conf
));
985 conf
.type
= sdata
->vif
.type
;
986 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
987 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
988 conf
.bssid
= sdata
->u
.sta
.bssid
;
989 conf
.ssid
= sdata
->u
.sta
.ssid
;
990 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
991 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
992 conf
.beacon
= beacon
;
993 conf
.beacon_control
= control
;
994 ieee80211_start_mesh(dev
);
995 } else if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
996 conf
.ssid
= sdata
->u
.ap
.ssid
;
997 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
998 conf
.beacon
= beacon
;
999 conf
.beacon_control
= control
;
1001 return local
->ops
->config_interface(local_to_hw(local
),
1002 &sdata
->vif
, &conf
);
1005 int ieee80211_if_config(struct net_device
*dev
)
1007 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1008 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1009 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MESH_POINT
&&
1010 (local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
1011 return ieee80211_if_config_beacon(dev
);
1012 return __ieee80211_if_config(dev
, NULL
, NULL
);
1015 int ieee80211_if_config_beacon(struct net_device
*dev
)
1017 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1018 struct ieee80211_tx_control control
;
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
,
1028 return __ieee80211_if_config(dev
, skb
, &control
);
1031 int ieee80211_hw_config(struct ieee80211_local
*local
)
1033 struct ieee80211_channel
*chan
;
1036 if (local
->sta_sw_scanning
)
1037 chan
= local
->scan_channel
;
1039 chan
= local
->oper_channel
;
1041 local
->hw
.conf
.channel
= chan
;
1043 if (!local
->hw
.conf
.power_level
)
1044 local
->hw
.conf
.power_level
= chan
->max_power
;
1046 local
->hw
.conf
.power_level
= min(chan
->max_power
,
1047 local
->hw
.conf
.power_level
);
1049 local
->hw
.conf
.max_antenna_gain
= chan
->max_antenna_gain
;
1051 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1052 printk(KERN_DEBUG
"%s: HW CONFIG: freq=%d\n",
1053 wiphy_name(local
->hw
.wiphy
), chan
->center_freq
);
1056 if (local
->open_count
)
1057 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
1063 * ieee80211_handle_ht should be used only after legacy configuration
1064 * has been determined namely band, as ht configuration depends upon
1065 * the hardware's HT abilities for a _specific_ band.
1067 u32
ieee80211_handle_ht(struct ieee80211_local
*local
, int enable_ht
,
1068 struct ieee80211_ht_info
*req_ht_cap
,
1069 struct ieee80211_ht_bss_info
*req_bss_cap
)
1071 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1072 struct ieee80211_supported_band
*sband
;
1073 struct ieee80211_ht_info ht_conf
;
1074 struct ieee80211_ht_bss_info ht_bss_conf
;
1077 u8 max_tx_streams
= IEEE80211_HT_CAP_MAX_STREAMS
;
1080 sband
= local
->hw
.wiphy
->bands
[conf
->channel
->band
];
1082 memset(&ht_conf
, 0, sizeof(struct ieee80211_ht_info
));
1083 memset(&ht_bss_conf
, 0, sizeof(struct ieee80211_ht_bss_info
));
1085 /* HT is not supported */
1086 if (!sband
->ht_info
.ht_supported
) {
1087 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1093 if (conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
)
1094 changed
|= BSS_CHANGED_HT
;
1095 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
1096 conf
->ht_conf
.ht_supported
= 0;
1101 if (!(conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
))
1102 changed
|= BSS_CHANGED_HT
;
1104 conf
->flags
|= IEEE80211_CONF_SUPPORT_HT_MODE
;
1105 ht_conf
.ht_supported
= 1;
1107 ht_conf
.cap
= req_ht_cap
->cap
& sband
->ht_info
.cap
;
1108 ht_conf
.cap
&= ~(IEEE80211_HT_CAP_MIMO_PS
);
1109 ht_conf
.cap
|= sband
->ht_info
.cap
& IEEE80211_HT_CAP_MIMO_PS
;
1110 ht_bss_conf
.primary_channel
= req_bss_cap
->primary_channel
;
1111 ht_bss_conf
.bss_cap
= req_bss_cap
->bss_cap
;
1112 ht_bss_conf
.bss_op_mode
= req_bss_cap
->bss_op_mode
;
1114 ht_conf
.ampdu_factor
= req_ht_cap
->ampdu_factor
;
1115 ht_conf
.ampdu_density
= req_ht_cap
->ampdu_density
;
1118 tx_mcs_set_cap
= sband
->ht_info
.supp_mcs_set
[12];
1120 /* configure suppoerted Tx MCS according to requested MCS
1121 * (based in most cases on Rx capabilities of peer) and self
1122 * Tx MCS capabilities (as defined by low level driver HW
1123 * Tx capabilities) */
1124 if (!(tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_DEFINED
))
1127 /* Counting from 0 therfore + 1 */
1128 if (tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_RX_DIFF
)
1129 max_tx_streams
= ((tx_mcs_set_cap
&
1130 IEEE80211_HT_CAP_MCS_TX_STREAMS
) >> 2) + 1;
1132 for (i
= 0; i
< max_tx_streams
; i
++)
1133 ht_conf
.supp_mcs_set
[i
] =
1134 sband
->ht_info
.supp_mcs_set
[i
] &
1135 req_ht_cap
->supp_mcs_set
[i
];
1137 if (tx_mcs_set_cap
& IEEE80211_HT_CAP_MCS_TX_UEQM
)
1138 for (i
= IEEE80211_SUPP_MCS_SET_UEQM
;
1139 i
< IEEE80211_SUPP_MCS_SET_LEN
; i
++)
1140 ht_conf
.supp_mcs_set
[i
] =
1141 sband
->ht_info
.supp_mcs_set
[i
] &
1142 req_ht_cap
->supp_mcs_set
[i
];
1145 /* if bss configuration changed store the new one */
1146 if (memcmp(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
)) ||
1147 memcmp(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
))) {
1148 changed
|= BSS_CHANGED_HT
;
1149 memcpy(&conf
->ht_conf
, &ht_conf
, sizeof(ht_conf
));
1150 memcpy(&conf
->ht_bss_conf
, &ht_bss_conf
, sizeof(ht_bss_conf
));
1156 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
1159 struct ieee80211_local
*local
= sdata
->local
;
1164 if (local
->ops
->bss_info_changed
)
1165 local
->ops
->bss_info_changed(local_to_hw(local
),
1171 void ieee80211_reset_erp_info(struct net_device
*dev
)
1173 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1175 sdata
->bss_conf
.use_cts_prot
= 0;
1176 sdata
->bss_conf
.use_short_preamble
= 0;
1177 ieee80211_bss_info_change_notify(sdata
,
1178 BSS_CHANGED_ERP_CTS_PROT
|
1179 BSS_CHANGED_ERP_PREAMBLE
);
1182 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
1183 struct sk_buff
*skb
,
1184 struct ieee80211_tx_status
*status
)
1186 struct ieee80211_local
*local
= hw_to_local(hw
);
1187 struct ieee80211_tx_status
*saved
;
1190 skb
->dev
= local
->mdev
;
1191 saved
= kmalloc(sizeof(struct ieee80211_tx_status
), GFP_ATOMIC
);
1192 if (unlikely(!saved
)) {
1193 if (net_ratelimit())
1194 printk(KERN_WARNING
"%s: Not enough memory, "
1195 "dropping tx status", skb
->dev
->name
);
1196 /* should be dev_kfree_skb_irq, but due to this function being
1197 * named _irqsafe instead of just _irq we can't be sure that
1198 * people won't call it from non-irq contexts */
1199 dev_kfree_skb_any(skb
);
1202 memcpy(saved
, status
, sizeof(struct ieee80211_tx_status
));
1203 /* copy pointer to saved status into skb->cb for use by tasklet */
1204 memcpy(skb
->cb
, &saved
, sizeof(saved
));
1206 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
1207 skb_queue_tail(status
->control
.flags
& IEEE80211_TXCTL_REQ_TX_STATUS
?
1208 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
1209 tmp
= skb_queue_len(&local
->skb_queue
) +
1210 skb_queue_len(&local
->skb_queue_unreliable
);
1211 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
1212 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1213 memcpy(&saved
, skb
->cb
, sizeof(saved
));
1215 dev_kfree_skb_irq(skb
);
1217 I802_DEBUG_INC(local
->tx_status_drop
);
1219 tasklet_schedule(&local
->tasklet
);
1221 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
1223 static void ieee80211_tasklet_handler(unsigned long data
)
1225 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
1226 struct sk_buff
*skb
;
1227 struct ieee80211_rx_status rx_status
;
1228 struct ieee80211_tx_status
*tx_status
;
1229 struct ieee80211_ra_tid
*ra_tid
;
1231 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
1232 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1233 switch (skb
->pkt_type
) {
1234 case IEEE80211_RX_MSG
:
1235 /* status is in skb->cb */
1236 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
1237 /* Clear skb->pkt_type in order to not confuse kernel
1240 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
1242 case IEEE80211_TX_STATUS_MSG
:
1243 /* get pointer to saved status out of skb->cb */
1244 memcpy(&tx_status
, skb
->cb
, sizeof(tx_status
));
1246 ieee80211_tx_status(local_to_hw(local
),
1250 case IEEE80211_DELBA_MSG
:
1251 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1252 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
1253 ra_tid
->ra
, ra_tid
->tid
);
1256 case IEEE80211_ADDBA_MSG
:
1257 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1258 ieee80211_start_tx_ba_cb(local_to_hw(local
),
1259 ra_tid
->ra
, ra_tid
->tid
);
1262 default: /* should never get here! */
1263 printk(KERN_ERR
"%s: Unknown message type (%d)\n",
1264 wiphy_name(local
->hw
.wiphy
), skb
->pkt_type
);
1271 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1272 * make a prepared TX frame (one that has been given to hw) to look like brand
1273 * new IEEE 802.11 frame that is ready to go through TX processing again.
1274 * Also, tx_packet_data in cb is restored from tx_control. */
1275 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
1276 struct ieee80211_key
*key
,
1277 struct sk_buff
*skb
,
1278 struct ieee80211_tx_control
*control
)
1280 int hdrlen
, iv_len
, mic_len
;
1281 struct ieee80211_tx_packet_data
*pkt_data
;
1283 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
1284 pkt_data
->ifindex
= vif_to_sdata(control
->vif
)->dev
->ifindex
;
1285 pkt_data
->flags
= 0;
1286 if (control
->flags
& IEEE80211_TXCTL_REQ_TX_STATUS
)
1287 pkt_data
->flags
|= IEEE80211_TXPD_REQ_TX_STATUS
;
1288 if (control
->flags
& IEEE80211_TXCTL_DO_NOT_ENCRYPT
)
1289 pkt_data
->flags
|= IEEE80211_TXPD_DO_NOT_ENCRYPT
;
1290 if (control
->flags
& IEEE80211_TXCTL_REQUEUE
)
1291 pkt_data
->flags
|= IEEE80211_TXPD_REQUEUE
;
1292 if (control
->flags
& IEEE80211_TXCTL_EAPOL_FRAME
)
1293 pkt_data
->flags
|= IEEE80211_TXPD_EAPOL_FRAME
;
1294 pkt_data
->queue
= control
->queue
;
1296 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1301 switch (key
->conf
.alg
) {
1303 iv_len
= WEP_IV_LEN
;
1304 mic_len
= WEP_ICV_LEN
;
1307 iv_len
= TKIP_IV_LEN
;
1308 mic_len
= TKIP_ICV_LEN
;
1311 iv_len
= CCMP_HDR_LEN
;
1312 mic_len
= CCMP_MIC_LEN
;
1318 if (skb
->len
>= mic_len
&&
1319 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
1320 skb_trim(skb
, skb
->len
- mic_len
);
1321 if (skb
->len
>= iv_len
&& skb
->len
> hdrlen
) {
1322 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
1323 skb_pull(skb
, iv_len
);
1328 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1329 u16 fc
= le16_to_cpu(hdr
->frame_control
);
1330 if ((fc
& 0x8C) == 0x88) /* QoS Control Field */ {
1331 fc
&= ~IEEE80211_STYPE_QOS_DATA
;
1332 hdr
->frame_control
= cpu_to_le16(fc
);
1333 memmove(skb
->data
+ 2, skb
->data
, hdrlen
- 2);
1339 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
1340 struct sta_info
*sta
,
1341 struct sk_buff
*skb
,
1342 struct ieee80211_tx_status
*status
)
1344 sta
->tx_filtered_count
++;
1347 * Clear the TX filter mask for this STA when sending the next
1348 * packet. If the STA went to power save mode, this will happen
1349 * happen when it wakes up for the next time.
1351 set_sta_flags(sta
, WLAN_STA_CLEAR_PS_FILT
);
1354 * This code races in the following way:
1356 * (1) STA sends frame indicating it will go to sleep and does so
1357 * (2) hardware/firmware adds STA to filter list, passes frame up
1358 * (3) hardware/firmware processes TX fifo and suppresses a frame
1359 * (4) we get TX status before having processed the frame and
1360 * knowing that the STA has gone to sleep.
1362 * This is actually quite unlikely even when both those events are
1363 * processed from interrupts coming in quickly after one another or
1364 * even at the same time because we queue both TX status events and
1365 * RX frames to be processed by a tasklet and process them in the
1366 * same order that they were received or TX status last. Hence, there
1367 * is no race as long as the frame RX is processed before the next TX
1368 * status, which drivers can ensure, see below.
1370 * Note that this can only happen if the hardware or firmware can
1371 * actually add STAs to the filter list, if this is done by the
1372 * driver in response to set_tim() (which will only reduce the race
1373 * this whole filtering tries to solve, not completely solve it)
1374 * this situation cannot happen.
1376 * To completely solve this race drivers need to make sure that they
1377 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1379 * (b) always process RX events before TX status events if ordering
1380 * can be unknown, for example with different interrupt status
1383 if (test_sta_flags(sta
, WLAN_STA_PS
) &&
1384 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
1385 ieee80211_remove_tx_extra(local
, sta
->key
, skb
,
1387 skb_queue_tail(&sta
->tx_filtered
, skb
);
1391 if (!test_sta_flags(sta
, WLAN_STA_PS
) &&
1392 !(status
->control
.flags
& IEEE80211_TXCTL_REQUEUE
)) {
1393 /* Software retry the packet once */
1394 status
->control
.flags
|= IEEE80211_TXCTL_REQUEUE
;
1395 ieee80211_remove_tx_extra(local
, sta
->key
, skb
,
1397 dev_queue_xmit(skb
);
1401 if (net_ratelimit())
1402 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
1403 "queue_len=%d PS=%d @%lu\n",
1404 wiphy_name(local
->hw
.wiphy
),
1405 skb_queue_len(&sta
->tx_filtered
),
1406 !!test_sta_flags(sta
, WLAN_STA_PS
), jiffies
);
1410 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
1411 struct ieee80211_tx_status
*status
)
1413 struct sk_buff
*skb2
;
1414 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1415 struct ieee80211_local
*local
= hw_to_local(hw
);
1417 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
1418 struct ieee80211_sub_if_data
*sdata
;
1419 struct net_device
*prev_dev
= NULL
;
1423 "%s: ieee80211_tx_status called with NULL status\n",
1424 wiphy_name(local
->hw
.wiphy
));
1431 if (status
->excessive_retries
) {
1432 struct sta_info
*sta
;
1433 sta
= sta_info_get(local
, hdr
->addr1
);
1435 if (test_sta_flags(sta
, WLAN_STA_PS
)) {
1437 * The STA is in power save mode, so assume
1438 * that this TX packet failed because of that.
1440 status
->excessive_retries
= 0;
1441 status
->flags
|= IEEE80211_TX_STATUS_TX_FILTERED
;
1442 ieee80211_handle_filtered_frame(local
, sta
,
1450 if (status
->flags
& IEEE80211_TX_STATUS_TX_FILTERED
) {
1451 struct sta_info
*sta
;
1452 sta
= sta_info_get(local
, hdr
->addr1
);
1454 ieee80211_handle_filtered_frame(local
, sta
, skb
,
1460 rate_control_tx_status(local
->mdev
, skb
, status
);
1464 ieee80211_led_tx(local
, 0);
1467 * Fragments are passed to low-level drivers as separate skbs, so these
1468 * are actually fragments, not frames. Update frame counters only for
1469 * the first fragment of the frame. */
1471 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
1472 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
1474 if (status
->flags
& IEEE80211_TX_STATUS_ACK
) {
1476 local
->dot11TransmittedFrameCount
++;
1477 if (is_multicast_ether_addr(hdr
->addr1
))
1478 local
->dot11MulticastTransmittedFrameCount
++;
1479 if (status
->retry_count
> 0)
1480 local
->dot11RetryCount
++;
1481 if (status
->retry_count
> 1)
1482 local
->dot11MultipleRetryCount
++;
1485 /* This counter shall be incremented for an acknowledged MPDU
1486 * with an individual address in the address 1 field or an MPDU
1487 * with a multicast address in the address 1 field of type Data
1489 if (!is_multicast_ether_addr(hdr
->addr1
) ||
1490 type
== IEEE80211_FTYPE_DATA
||
1491 type
== IEEE80211_FTYPE_MGMT
)
1492 local
->dot11TransmittedFragmentCount
++;
1495 local
->dot11FailedCount
++;
1498 /* this was a transmitted frame, but now we want to reuse it */
1502 * This is a bit racy but we can avoid a lot of work
1505 if (!local
->monitors
&& !local
->cooked_mntrs
) {
1510 /* send frame to monitor interfaces now */
1512 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
1513 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
1518 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
1519 skb_push(skb
, sizeof(*rthdr
));
1521 memset(rthdr
, 0, sizeof(*rthdr
));
1522 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
1523 rthdr
->hdr
.it_present
=
1524 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
1525 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
1527 if (!(status
->flags
& IEEE80211_TX_STATUS_ACK
) &&
1528 !is_multicast_ether_addr(hdr
->addr1
))
1529 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
1531 if ((status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) &&
1532 (status
->control
.flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
))
1533 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
1534 else if (status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
)
1535 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
1537 rthdr
->data_retries
= status
->retry_count
;
1539 /* XXX: is this sufficient for BPF? */
1540 skb_set_mac_header(skb
, 0);
1541 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1542 skb
->pkt_type
= PACKET_OTHERHOST
;
1543 skb
->protocol
= htons(ETH_P_802_2
);
1544 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1547 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
1548 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MNTR
) {
1549 if (!netif_running(sdata
->dev
))
1553 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1555 skb2
->dev
= prev_dev
;
1560 prev_dev
= sdata
->dev
;
1564 skb
->dev
= prev_dev
;
1571 EXPORT_SYMBOL(ieee80211_tx_status
);
1573 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
1574 const struct ieee80211_ops
*ops
)
1576 struct ieee80211_local
*local
;
1578 struct wiphy
*wiphy
;
1580 /* Ensure 32-byte alignment of our private data and hw private data.
1581 * We use the wiphy priv data for both our ieee80211_local and for
1582 * the driver's private data
1584 * In memory it'll be like this:
1586 * +-------------------------+
1588 * +-------------------------+
1589 * | struct ieee80211_local |
1590 * +-------------------------+
1591 * | driver's private data |
1592 * +-------------------------+
1595 priv_size
= ((sizeof(struct ieee80211_local
) +
1596 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
1599 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
1604 wiphy
->privid
= mac80211_wiphy_privid
;
1606 local
= wiphy_priv(wiphy
);
1607 local
->hw
.wiphy
= wiphy
;
1609 local
->hw
.priv
= (char *)local
+
1610 ((sizeof(struct ieee80211_local
) +
1611 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
1614 BUG_ON(!ops
->start
);
1616 BUG_ON(!ops
->config
);
1617 BUG_ON(!ops
->add_interface
);
1618 BUG_ON(!ops
->remove_interface
);
1619 BUG_ON(!ops
->configure_filter
);
1622 local
->hw
.queues
= 1; /* default */
1624 local
->bridge_packets
= 1;
1626 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
1627 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
1628 local
->short_retry_limit
= 7;
1629 local
->long_retry_limit
= 4;
1630 local
->hw
.conf
.radio_enabled
= 1;
1632 INIT_LIST_HEAD(&local
->interfaces
);
1634 spin_lock_init(&local
->key_lock
);
1636 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
1638 sta_info_init(local
);
1640 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
1641 (unsigned long)local
);
1642 tasklet_disable(&local
->tx_pending_tasklet
);
1644 tasklet_init(&local
->tasklet
,
1645 ieee80211_tasklet_handler
,
1646 (unsigned long) local
);
1647 tasklet_disable(&local
->tasklet
);
1649 skb_queue_head_init(&local
->skb_queue
);
1650 skb_queue_head_init(&local
->skb_queue_unreliable
);
1652 return local_to_hw(local
);
1654 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1656 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1658 struct ieee80211_local
*local
= hw_to_local(hw
);
1661 enum ieee80211_band band
;
1662 struct net_device
*mdev
;
1663 struct ieee80211_sub_if_data
*sdata
;
1666 * generic code guarantees at least one band,
1667 * set this very early because much code assumes
1668 * that hw.conf.channel is assigned
1670 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1671 struct ieee80211_supported_band
*sband
;
1673 sband
= local
->hw
.wiphy
->bands
[band
];
1675 /* init channel we're on */
1676 local
->hw
.conf
.channel
=
1677 local
->oper_channel
=
1678 local
->scan_channel
= &sband
->channels
[0];
1683 result
= wiphy_register(local
->hw
.wiphy
);
1687 /* for now, mdev needs sub_if_data :/ */
1688 mdev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
),
1689 "wmaster%d", ether_setup
);
1691 goto fail_mdev_alloc
;
1693 sdata
= IEEE80211_DEV_TO_SUB_IF(mdev
);
1694 mdev
->ieee80211_ptr
= &sdata
->wdev
;
1695 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1699 ieee80211_rx_bss_list_init(mdev
);
1701 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
1702 mdev
->open
= ieee80211_master_open
;
1703 mdev
->stop
= ieee80211_master_stop
;
1704 mdev
->type
= ARPHRD_IEEE80211
;
1705 mdev
->header_ops
= &ieee80211_header_ops
;
1706 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
1708 sdata
->vif
.type
= IEEE80211_IF_TYPE_AP
;
1710 sdata
->local
= local
;
1711 sdata
->u
.ap
.force_unicast_rateidx
= -1;
1712 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
1713 ieee80211_if_sdata_init(sdata
);
1715 /* no RCU needed since we're still during init phase */
1716 list_add_tail(&sdata
->list
, &local
->interfaces
);
1718 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1719 local
->hw
.workqueue
= create_singlethread_workqueue(name
);
1720 if (!local
->hw
.workqueue
) {
1722 goto fail_workqueue
;
1726 * The hardware needs headroom for sending the frame,
1727 * and we need some headroom for passing the frame to monitor
1728 * interfaces, but never both at the same time.
1730 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1731 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1733 debugfs_hw_add(local
);
1735 local
->hw
.conf
.beacon_int
= 1000;
1737 local
->wstats_flags
|= local
->hw
.flags
& (IEEE80211_HW_SIGNAL_UNSPEC
|
1738 IEEE80211_HW_SIGNAL_DB
|
1739 IEEE80211_HW_SIGNAL_DBM
) ?
1740 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1741 local
->wstats_flags
|= local
->hw
.flags
& IEEE80211_HW_NOISE_DBM
?
1742 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1743 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
1744 local
->wstats_flags
|= IW_QUAL_DBM
;
1746 result
= sta_info_start(local
);
1751 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1755 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1756 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1758 result
= register_netdevice(local
->mdev
);
1762 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1763 ieee80211_if_set_type(local
->mdev
, IEEE80211_IF_TYPE_AP
);
1765 result
= ieee80211_init_rate_ctrl_alg(local
,
1766 hw
->rate_control_algorithm
);
1768 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1769 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1773 result
= ieee80211_wep_init(local
);
1776 printk(KERN_DEBUG
"%s: Failed to initialize wep\n",
1777 wiphy_name(local
->hw
.wiphy
));
1781 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
1782 hw
->queues
= IEEE80211_MAX_QUEUES
;
1783 if (hw
->ampdu_queues
> IEEE80211_MAX_AMPDU_QUEUES
)
1784 hw
->ampdu_queues
= IEEE80211_MAX_AMPDU_QUEUES
;
1786 ieee80211_install_qdisc(local
->mdev
);
1788 /* add one default STA interface */
1789 result
= ieee80211_if_add(local
->mdev
, "wlan%d", NULL
,
1790 IEEE80211_IF_TYPE_STA
, NULL
);
1792 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1793 wiphy_name(local
->hw
.wiphy
));
1795 local
->reg_state
= IEEE80211_DEV_REGISTERED
;
1798 ieee80211_led_init(local
);
1803 rate_control_deinitialize(local
);
1805 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1806 unregister_netdevice(local
->mdev
);
1810 sta_info_stop(local
);
1812 debugfs_hw_del(local
);
1813 destroy_workqueue(local
->hw
.workqueue
);
1815 if (local
->mdev
!= NULL
) {
1816 ieee80211_if_free(local
->mdev
);
1820 wiphy_unregister(local
->hw
.wiphy
);
1823 EXPORT_SYMBOL(ieee80211_register_hw
);
1825 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1827 struct ieee80211_local
*local
= hw_to_local(hw
);
1828 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1830 tasklet_kill(&local
->tx_pending_tasklet
);
1831 tasklet_kill(&local
->tasklet
);
1835 BUG_ON(local
->reg_state
!= IEEE80211_DEV_REGISTERED
);
1837 local
->reg_state
= IEEE80211_DEV_UNREGISTERED
;
1840 * At this point, interface list manipulations are fine
1841 * because the driver cannot be handing us frames any
1842 * more and the tasklet is killed.
1846 * First, we remove all non-master interfaces. Do this because they
1847 * may have bss pointer dependency on the master, and when we free
1848 * the master these would be freed as well, breaking our list
1849 * iteration completely.
1851 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1852 if (sdata
->dev
== local
->mdev
)
1854 list_del(&sdata
->list
);
1855 __ieee80211_if_del(local
, sdata
);
1858 /* then, finally, remove the master interface */
1859 __ieee80211_if_del(local
, IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1863 ieee80211_rx_bss_list_deinit(local
->mdev
);
1864 ieee80211_clear_tx_pending(local
);
1865 sta_info_stop(local
);
1866 rate_control_deinitialize(local
);
1867 debugfs_hw_del(local
);
1869 if (skb_queue_len(&local
->skb_queue
)
1870 || skb_queue_len(&local
->skb_queue_unreliable
))
1871 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1872 wiphy_name(local
->hw
.wiphy
));
1873 skb_queue_purge(&local
->skb_queue
);
1874 skb_queue_purge(&local
->skb_queue_unreliable
);
1876 destroy_workqueue(local
->hw
.workqueue
);
1877 wiphy_unregister(local
->hw
.wiphy
);
1878 ieee80211_wep_free(local
);
1879 ieee80211_led_exit(local
);
1880 ieee80211_if_free(local
->mdev
);
1883 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1885 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1887 struct ieee80211_local
*local
= hw_to_local(hw
);
1889 wiphy_free(local
->hw
.wiphy
);
1891 EXPORT_SYMBOL(ieee80211_free_hw
);
1893 static int __init
ieee80211_init(void)
1895 struct sk_buff
*skb
;
1898 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data
) > sizeof(skb
->cb
));
1900 ret
= rc80211_pid_init();
1904 ret
= ieee80211_wme_register();
1906 printk(KERN_DEBUG
"ieee80211_init: failed to "
1907 "initialize WME (err=%d)\n", ret
);
1908 goto out_cleanup_pid
;
1911 ieee80211_debugfs_netdev_init();
1921 static void __exit
ieee80211_exit(void)
1926 * For key todo, it'll be empty by now but the work
1927 * might still be scheduled.
1929 flush_scheduled_work();
1934 ieee80211_wme_unregister();
1935 ieee80211_debugfs_netdev_exit();
1939 subsys_initcall(ieee80211_init
);
1940 module_exit(ieee80211_exit
);
1942 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1943 MODULE_LICENSE("GPL");