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"
28 #include "ieee80211_rate.h"
32 #include "ieee80211_led.h"
35 #include "debugfs_netdev.h"
37 #define SUPP_MCS_SET_LEN 16
40 * For seeing transmitted packets on monitor interfaces
41 * we have a radiotap header too.
43 struct ieee80211_tx_status_rtap_hdr
{
44 struct ieee80211_radiotap_header hdr
;
47 } __attribute__ ((packed
));
49 /* common interface routines */
51 static int header_parse_80211(const struct sk_buff
*skb
, unsigned char *haddr
)
53 memcpy(haddr
, skb_mac_header(skb
) + 10, ETH_ALEN
); /* addr2 */
57 /* must be called under mdev tx lock */
58 static void ieee80211_configure_filter(struct ieee80211_local
*local
)
60 unsigned int changed_flags
;
61 unsigned int new_flags
= 0;
63 if (atomic_read(&local
->iff_promiscs
))
64 new_flags
|= FIF_PROMISC_IN_BSS
;
66 if (atomic_read(&local
->iff_allmultis
))
67 new_flags
|= FIF_ALLMULTI
;
70 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
72 if (local
->fif_fcsfail
)
73 new_flags
|= FIF_FCSFAIL
;
75 if (local
->fif_plcpfail
)
76 new_flags
|= FIF_PLCPFAIL
;
78 if (local
->fif_control
)
79 new_flags
|= FIF_CONTROL
;
81 if (local
->fif_other_bss
)
82 new_flags
|= FIF_OTHER_BSS
;
84 changed_flags
= local
->filter_flags
^ new_flags
;
89 local
->ops
->configure_filter(local_to_hw(local
),
90 changed_flags
, &new_flags
,
91 local
->mdev
->mc_count
,
92 local
->mdev
->mc_list
);
94 WARN_ON(new_flags
& (1<<31));
96 local
->filter_flags
= new_flags
& ~(1<<31);
99 /* master interface */
101 static int ieee80211_master_open(struct net_device
*dev
)
103 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
104 struct ieee80211_sub_if_data
*sdata
;
105 int res
= -EOPNOTSUPP
;
107 /* we hold the RTNL here so can safely walk the list */
108 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
109 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
)) {
117 static int ieee80211_master_stop(struct net_device
*dev
)
119 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
120 struct ieee80211_sub_if_data
*sdata
;
122 /* we hold the RTNL here so can safely walk the list */
123 list_for_each_entry(sdata
, &local
->interfaces
, list
)
124 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
))
125 dev_close(sdata
->dev
);
130 static void ieee80211_master_set_multicast_list(struct net_device
*dev
)
132 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
134 ieee80211_configure_filter(local
);
137 /* regular interfaces */
139 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
141 /* FIX: what would be proper limits for MTU?
142 * This interface uses 802.3 frames. */
143 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6) {
144 printk(KERN_WARNING
"%s: invalid MTU %d\n",
149 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
150 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
151 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
156 static inline int identical_mac_addr_allowed(int type1
, int type2
)
158 return (type1
== IEEE80211_IF_TYPE_MNTR
||
159 type2
== IEEE80211_IF_TYPE_MNTR
||
160 (type1
== IEEE80211_IF_TYPE_AP
&&
161 type2
== IEEE80211_IF_TYPE_WDS
) ||
162 (type1
== IEEE80211_IF_TYPE_WDS
&&
163 (type2
== IEEE80211_IF_TYPE_WDS
||
164 type2
== IEEE80211_IF_TYPE_AP
)) ||
165 (type1
== IEEE80211_IF_TYPE_AP
&&
166 type2
== IEEE80211_IF_TYPE_VLAN
) ||
167 (type1
== IEEE80211_IF_TYPE_VLAN
&&
168 (type2
== IEEE80211_IF_TYPE_AP
||
169 type2
== IEEE80211_IF_TYPE_VLAN
)));
172 static int ieee80211_open(struct net_device
*dev
)
174 struct ieee80211_sub_if_data
*sdata
, *nsdata
;
175 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
176 struct ieee80211_if_init_conf conf
;
178 bool need_hw_reconfig
= 0;
180 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
182 /* we hold the RTNL here so can safely walk the list */
183 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
184 struct net_device
*ndev
= nsdata
->dev
;
186 if (ndev
!= dev
&& ndev
!= local
->mdev
&& netif_running(ndev
) &&
187 compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
) == 0) {
189 * check whether it may have the same address
191 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
196 * can only add VLANs to enabled APs
198 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_VLAN
&&
199 nsdata
->vif
.type
== IEEE80211_IF_TYPE_AP
&&
200 netif_running(nsdata
->dev
))
201 sdata
->u
.vlan
.ap
= nsdata
;
205 switch (sdata
->vif
.type
) {
206 case IEEE80211_IF_TYPE_WDS
:
207 if (is_zero_ether_addr(sdata
->u
.wds
.remote_addr
))
210 case IEEE80211_IF_TYPE_VLAN
:
211 if (!sdata
->u
.vlan
.ap
)
214 case IEEE80211_IF_TYPE_AP
:
215 case IEEE80211_IF_TYPE_STA
:
216 case IEEE80211_IF_TYPE_MNTR
:
217 case IEEE80211_IF_TYPE_IBSS
:
218 /* no special treatment */
220 case IEEE80211_IF_TYPE_INVALID
:
226 if (local
->open_count
== 0) {
228 if (local
->ops
->start
)
229 res
= local
->ops
->start(local_to_hw(local
));
232 need_hw_reconfig
= 1;
233 ieee80211_led_radio(local
, local
->hw
.conf
.radio_enabled
);
236 switch (sdata
->vif
.type
) {
237 case IEEE80211_IF_TYPE_VLAN
:
238 list_add(&sdata
->u
.vlan
.list
, &sdata
->u
.vlan
.ap
->u
.ap
.vlans
);
239 /* no need to tell driver */
241 case IEEE80211_IF_TYPE_MNTR
:
242 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
243 local
->cooked_mntrs
++;
247 /* must be before the call to ieee80211_configure_filter */
249 if (local
->monitors
== 1)
250 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
252 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
253 local
->fif_fcsfail
++;
254 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
255 local
->fif_plcpfail
++;
256 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
257 local
->fif_control
++;
258 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
259 local
->fif_other_bss
++;
261 netif_tx_lock_bh(local
->mdev
);
262 ieee80211_configure_filter(local
);
263 netif_tx_unlock_bh(local
->mdev
);
265 case IEEE80211_IF_TYPE_STA
:
266 case IEEE80211_IF_TYPE_IBSS
:
267 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
270 conf
.vif
= &sdata
->vif
;
271 conf
.type
= sdata
->vif
.type
;
272 conf
.mac_addr
= dev
->dev_addr
;
273 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
274 if (res
&& !local
->open_count
&& local
->ops
->stop
)
275 local
->ops
->stop(local_to_hw(local
));
279 ieee80211_if_config(dev
);
280 ieee80211_reset_erp_info(dev
);
281 ieee80211_enable_keys(sdata
);
283 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
&&
284 !(sdata
->flags
& IEEE80211_SDATA_USERSPACE_MLME
))
285 netif_carrier_off(dev
);
287 netif_carrier_on(dev
);
290 if (local
->open_count
== 0) {
291 res
= dev_open(local
->mdev
);
293 tasklet_enable(&local
->tx_pending_tasklet
);
294 tasklet_enable(&local
->tasklet
);
298 * set_multicast_list will be invoked by the networking core
299 * which will check whether any increments here were done in
300 * error and sync them down to the hardware as filter flags.
302 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
303 atomic_inc(&local
->iff_allmultis
);
305 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
306 atomic_inc(&local
->iff_promiscs
);
309 if (need_hw_reconfig
)
310 ieee80211_hw_config(local
);
312 netif_start_queue(dev
);
317 static int ieee80211_stop(struct net_device
*dev
)
319 struct ieee80211_sub_if_data
*sdata
;
320 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
321 struct ieee80211_if_init_conf conf
;
322 struct sta_info
*sta
;
325 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
327 list_for_each_entry(sta
, &local
->sta_list
, list
) {
329 for (i
= 0; i
< STA_TID_NUM
; i
++)
330 ieee80211_sta_stop_rx_ba_session(sta
->dev
,
333 WLAN_REASON_QSTA_LEAVE_QBSS
);
336 netif_stop_queue(dev
);
339 * Don't count this interface for promisc/allmulti while it
340 * is down. dev_mc_unsync() will invoke set_multicast_list
341 * on the master interface which will sync these down to the
342 * hardware as filter flags.
344 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
345 atomic_dec(&local
->iff_allmultis
);
347 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
348 atomic_dec(&local
->iff_promiscs
);
350 dev_mc_unsync(local
->mdev
, dev
);
352 /* APs need special treatment */
353 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
354 struct ieee80211_sub_if_data
*vlan
, *tmp
;
355 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
358 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
362 /* down all dependent devices, that is VLANs */
363 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
365 dev_close(vlan
->dev
);
366 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
371 switch (sdata
->vif
.type
) {
372 case IEEE80211_IF_TYPE_VLAN
:
373 list_del(&sdata
->u
.vlan
.list
);
374 sdata
->u
.vlan
.ap
= NULL
;
375 /* no need to tell driver */
377 case IEEE80211_IF_TYPE_MNTR
:
378 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
379 local
->cooked_mntrs
--;
384 if (local
->monitors
== 0)
385 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
387 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
388 local
->fif_fcsfail
--;
389 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
390 local
->fif_plcpfail
--;
391 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
392 local
->fif_control
--;
393 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
394 local
->fif_other_bss
--;
396 netif_tx_lock_bh(local
->mdev
);
397 ieee80211_configure_filter(local
);
398 netif_tx_unlock_bh(local
->mdev
);
400 case IEEE80211_IF_TYPE_STA
:
401 case IEEE80211_IF_TYPE_IBSS
:
402 sdata
->u
.sta
.state
= IEEE80211_DISABLED
;
403 del_timer_sync(&sdata
->u
.sta
.timer
);
405 * When we get here, the interface is marked down.
406 * Call synchronize_rcu() to wait for the RX path
407 * should it be using the interface and enqueuing
408 * frames at this very time on another CPU.
411 skb_queue_purge(&sdata
->u
.sta
.skb_queue
);
413 if (local
->scan_dev
== sdata
->dev
) {
414 if (!local
->ops
->hw_scan
) {
415 local
->sta_sw_scanning
= 0;
416 cancel_delayed_work(&local
->scan_work
);
418 local
->sta_hw_scanning
= 0;
421 flush_workqueue(local
->hw
.workqueue
);
423 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PRIVACY_INVOKED
;
424 kfree(sdata
->u
.sta
.extra_ie
);
425 sdata
->u
.sta
.extra_ie
= NULL
;
426 sdata
->u
.sta
.extra_ie_len
= 0;
429 conf
.vif
= &sdata
->vif
;
430 conf
.type
= sdata
->vif
.type
;
431 conf
.mac_addr
= dev
->dev_addr
;
432 /* disable all keys for as long as this netdev is down */
433 ieee80211_disable_keys(sdata
);
434 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
437 if (local
->open_count
== 0) {
438 if (netif_running(local
->mdev
))
439 dev_close(local
->mdev
);
441 if (local
->ops
->stop
)
442 local
->ops
->stop(local_to_hw(local
));
444 ieee80211_led_radio(local
, 0);
446 tasklet_disable(&local
->tx_pending_tasklet
);
447 tasklet_disable(&local
->tasklet
);
453 int ieee80211_start_tx_ba_session(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
455 struct ieee80211_local
*local
= hw_to_local(hw
);
456 struct sta_info
*sta
;
457 struct ieee80211_sub_if_data
*sdata
;
458 u16 start_seq_num
= 0;
461 DECLARE_MAC_BUF(mac
);
463 if (tid
>= STA_TID_NUM
)
466 #ifdef CONFIG_MAC80211_HT_DEBUG
467 printk(KERN_DEBUG
"Open BA session requested for %s tid %u\n",
468 print_mac(mac
, ra
), tid
);
469 #endif /* CONFIG_MAC80211_HT_DEBUG */
471 sta
= sta_info_get(local
, ra
);
473 printk(KERN_DEBUG
"Could not find the station\n");
477 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
479 /* we have tried too many times, receiver does not want A-MPDU */
480 if (sta
->ampdu_mlme
.tid_tx
[tid
].addba_req_num
> HT_AGG_MAX_RETRIES
) {
485 state
= &sta
->ampdu_mlme
.tid_tx
[tid
].state
;
486 /* check if the TID is not in aggregation flow already */
487 if (*state
!= HT_AGG_STATE_IDLE
) {
488 #ifdef CONFIG_MAC80211_HT_DEBUG
489 printk(KERN_DEBUG
"BA request denied - session is not "
490 "idle on tid %u\n", tid
);
491 #endif /* CONFIG_MAC80211_HT_DEBUG */
496 /* ensure that TX flow won't interrupt us
497 * until the end of the call to requeue function */
498 spin_lock_bh(&local
->mdev
->queue_lock
);
500 /* create a new queue for this aggregation */
501 ret
= ieee80211_ht_agg_queue_add(local
, sta
, tid
);
503 /* case no queue is available to aggregation
504 * don't switch to aggregation */
506 #ifdef CONFIG_MAC80211_HT_DEBUG
507 printk(KERN_DEBUG
"BA request denied - no queue available for"
509 #endif /* CONFIG_MAC80211_HT_DEBUG */
510 spin_unlock_bh(&local
->mdev
->queue_lock
);
513 sdata
= IEEE80211_DEV_TO_SUB_IF(sta
->dev
);
515 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
516 * call back right away, it must see that the flow has begun */
517 *state
|= HT_ADDBA_REQUESTED_MSK
;
519 if (local
->ops
->ampdu_action
)
520 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_START
,
521 ra
, tid
, &start_seq_num
);
524 /* No need to requeue the packets in the agg queue, since we
525 * held the tx lock: no packet could be enqueued to the newly
527 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 0);
528 #ifdef CONFIG_MAC80211_HT_DEBUG
529 printk(KERN_DEBUG
"BA request denied - HW or queue unavailable"
530 " for tid %d\n", tid
);
531 #endif /* CONFIG_MAC80211_HT_DEBUG */
532 spin_unlock_bh(&local
->mdev
->queue_lock
);
533 *state
= HT_AGG_STATE_IDLE
;
537 /* Will put all the packets in the new SW queue */
538 ieee80211_requeue(local
, ieee802_1d_to_ac
[tid
]);
539 spin_unlock_bh(&local
->mdev
->queue_lock
);
541 /* We have most probably almost emptied the legacy queue */
542 /* ieee80211_wake_queue(local_to_hw(local), ieee802_1d_to_ac[tid]); */
544 /* send an addBA request */
545 sta
->ampdu_mlme
.dialog_token_allocator
++;
546 sta
->ampdu_mlme
.tid_tx
[tid
].dialog_token
=
547 sta
->ampdu_mlme
.dialog_token_allocator
;
548 sta
->ampdu_mlme
.tid_tx
[tid
].ssn
= start_seq_num
;
550 ieee80211_send_addba_request(sta
->dev
, ra
, tid
,
551 sta
->ampdu_mlme
.tid_tx
[tid
].dialog_token
,
552 sta
->ampdu_mlme
.tid_tx
[tid
].ssn
,
555 /* activate the timer for the recipient's addBA response */
556 sta
->ampdu_mlme
.tid_tx
[tid
].addba_resp_timer
.expires
=
557 jiffies
+ ADDBA_RESP_INTERVAL
;
558 add_timer(&sta
->ampdu_mlme
.tid_tx
[tid
].addba_resp_timer
);
559 printk(KERN_DEBUG
"activated addBA response timer on tid %d\n", tid
);
562 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
566 EXPORT_SYMBOL(ieee80211_start_tx_ba_session
);
568 int ieee80211_stop_tx_ba_session(struct ieee80211_hw
*hw
,
570 enum ieee80211_back_parties initiator
)
572 struct ieee80211_local
*local
= hw_to_local(hw
);
573 struct sta_info
*sta
;
576 DECLARE_MAC_BUF(mac
);
578 if (tid
>= STA_TID_NUM
)
581 #ifdef CONFIG_MAC80211_HT_DEBUG
582 printk(KERN_DEBUG
"Stop a BA session requested for %s tid %u\n",
583 print_mac(mac
, ra
), tid
);
584 #endif /* CONFIG_MAC80211_HT_DEBUG */
586 sta
= sta_info_get(local
, ra
);
590 /* check if the TID is in aggregation */
591 state
= &sta
->ampdu_mlme
.tid_tx
[tid
].state
;
592 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
594 if (*state
!= HT_AGG_STATE_OPERATIONAL
) {
595 #ifdef CONFIG_MAC80211_HT_DEBUG
596 printk(KERN_DEBUG
"Try to stop Tx aggregation on"
597 " non active TID\n");
598 #endif /* CONFIG_MAC80211_HT_DEBUG */
603 ieee80211_stop_queue(hw
, sta
->tid_to_tx_q
[tid
]);
605 *state
= HT_AGG_STATE_REQ_STOP_BA_MSK
|
606 (initiator
<< HT_AGG_STATE_INITIATOR_SHIFT
);
608 if (local
->ops
->ampdu_action
)
609 ret
= local
->ops
->ampdu_action(hw
, IEEE80211_AMPDU_TX_STOP
,
612 /* case HW denied going back to legacy */
614 WARN_ON(ret
!= -EBUSY
);
615 *state
= HT_AGG_STATE_OPERATIONAL
;
616 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
621 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
625 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session
);
627 void ieee80211_start_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
)
629 struct ieee80211_local
*local
= hw_to_local(hw
);
630 struct sta_info
*sta
;
632 DECLARE_MAC_BUF(mac
);
634 if (tid
>= STA_TID_NUM
) {
635 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
640 sta
= sta_info_get(local
, ra
);
642 printk(KERN_DEBUG
"Could not find station: %s\n",
647 state
= &sta
->ampdu_mlme
.tid_tx
[tid
].state
;
648 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
650 if (!(*state
& HT_ADDBA_REQUESTED_MSK
)) {
651 printk(KERN_DEBUG
"addBA was not requested yet, state is %d\n",
653 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
658 WARN_ON_ONCE(*state
& HT_ADDBA_DRV_READY_MSK
);
660 *state
|= HT_ADDBA_DRV_READY_MSK
;
662 if (*state
== HT_AGG_STATE_OPERATIONAL
) {
663 printk(KERN_DEBUG
"Aggregation is on for tid %d \n", tid
);
664 ieee80211_wake_queue(hw
, sta
->tid_to_tx_q
[tid
]);
666 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
669 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb
);
671 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u8 tid
)
673 struct ieee80211_local
*local
= hw_to_local(hw
);
674 struct sta_info
*sta
;
677 DECLARE_MAC_BUF(mac
);
679 if (tid
>= STA_TID_NUM
) {
680 printk(KERN_DEBUG
"Bad TID value: tid = %d (>= %d)\n",
685 printk(KERN_DEBUG
"Stop a BA session requested on DA %s tid %d\n",
686 print_mac(mac
, ra
), tid
);
688 sta
= sta_info_get(local
, ra
);
690 printk(KERN_DEBUG
"Could not find station: %s\n",
694 state
= &sta
->ampdu_mlme
.tid_tx
[tid
].state
;
696 spin_lock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
697 if ((*state
& HT_AGG_STATE_REQ_STOP_BA_MSK
) == 0) {
698 printk(KERN_DEBUG
"unexpected callback to A-MPDU stop\n");
700 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
704 if (*state
& HT_AGG_STATE_INITIATOR_MSK
)
705 ieee80211_send_delba(sta
->dev
, ra
, tid
,
706 WLAN_BACK_INITIATOR
, WLAN_REASON_QSTA_NOT_USE
);
708 agg_queue
= sta
->tid_to_tx_q
[tid
];
710 /* avoid ordering issues: we are the only one that can modify
711 * the content of the qdiscs */
712 spin_lock_bh(&local
->mdev
->queue_lock
);
713 /* remove the queue for this aggregation */
714 ieee80211_ht_agg_queue_remove(local
, sta
, tid
, 1);
715 spin_unlock_bh(&local
->mdev
->queue_lock
);
717 /* we just requeued the all the frames that were in the removed
718 * queue, and since we might miss a softirq we do netif_schedule.
719 * ieee80211_wake_queue is not used here as this queue is not
720 * necessarily stopped */
721 netif_schedule(local
->mdev
);
722 *state
= HT_AGG_STATE_IDLE
;
723 sta
->ampdu_mlme
.tid_tx
[tid
].addba_req_num
= 0;
724 spin_unlock_bh(&sta
->ampdu_mlme
.ampdu_tx
);
728 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb
);
730 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
731 const u8
*ra
, u16 tid
)
733 struct ieee80211_local
*local
= hw_to_local(hw
);
734 struct ieee80211_ra_tid
*ra_tid
;
735 struct sk_buff
*skb
= dev_alloc_skb(0);
737 if (unlikely(!skb
)) {
739 printk(KERN_WARNING
"%s: Not enough memory, "
740 "dropping start BA session", skb
->dev
->name
);
743 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
744 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
747 skb
->pkt_type
= IEEE80211_ADDBA_MSG
;
748 skb_queue_tail(&local
->skb_queue
, skb
);
749 tasklet_schedule(&local
->tasklet
);
751 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe
);
753 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
,
754 const u8
*ra
, u16 tid
)
756 struct ieee80211_local
*local
= hw_to_local(hw
);
757 struct ieee80211_ra_tid
*ra_tid
;
758 struct sk_buff
*skb
= dev_alloc_skb(0);
760 if (unlikely(!skb
)) {
762 printk(KERN_WARNING
"%s: Not enough memory, "
763 "dropping stop BA session", skb
->dev
->name
);
766 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
767 memcpy(&ra_tid
->ra
, ra
, ETH_ALEN
);
770 skb
->pkt_type
= IEEE80211_DELBA_MSG
;
771 skb_queue_tail(&local
->skb_queue
, skb
);
772 tasklet_schedule(&local
->tasklet
);
774 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe
);
776 static void ieee80211_set_multicast_list(struct net_device
*dev
)
778 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
779 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
780 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
782 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
783 promisc
= !!(dev
->flags
& IFF_PROMISC
);
784 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
785 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
787 if (allmulti
!= sdata_allmulti
) {
788 if (dev
->flags
& IFF_ALLMULTI
)
789 atomic_inc(&local
->iff_allmultis
);
791 atomic_dec(&local
->iff_allmultis
);
792 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
795 if (promisc
!= sdata_promisc
) {
796 if (dev
->flags
& IFF_PROMISC
)
797 atomic_inc(&local
->iff_promiscs
);
799 atomic_dec(&local
->iff_promiscs
);
800 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
803 dev_mc_sync(local
->mdev
, dev
);
806 static const struct header_ops ieee80211_header_ops
= {
807 .create
= eth_header
,
808 .parse
= header_parse_80211
,
809 .rebuild
= eth_rebuild_header
,
810 .cache
= eth_header_cache
,
811 .cache_update
= eth_header_cache_update
,
814 /* Must not be called for mdev */
815 void ieee80211_if_setup(struct net_device
*dev
)
818 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
819 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
820 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
821 dev
->change_mtu
= ieee80211_change_mtu
;
822 dev
->open
= ieee80211_open
;
823 dev
->stop
= ieee80211_stop
;
824 dev
->destructor
= ieee80211_if_free
;
827 /* WDS specialties */
829 int ieee80211_if_update_wds(struct net_device
*dev
, u8
*remote_addr
)
831 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
832 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
833 struct sta_info
*sta
;
834 DECLARE_MAC_BUF(mac
);
836 if (compare_ether_addr(remote_addr
, sdata
->u
.wds
.remote_addr
) == 0)
839 /* Create STA entry for the new peer */
840 sta
= sta_info_add(local
, dev
, remote_addr
, GFP_KERNEL
);
844 sta
->flags
|= WLAN_STA_AUTHORIZED
;
848 /* Remove STA entry for the old peer */
849 sta
= sta_info_get(local
, sdata
->u
.wds
.remote_addr
);
854 printk(KERN_DEBUG
"%s: could not find STA entry for WDS link "
856 dev
->name
, print_mac(mac
, sdata
->u
.wds
.remote_addr
));
859 /* Update WDS link data */
860 memcpy(&sdata
->u
.wds
.remote_addr
, remote_addr
, ETH_ALEN
);
865 /* everything else */
867 static int __ieee80211_if_config(struct net_device
*dev
,
868 struct sk_buff
*beacon
,
869 struct ieee80211_tx_control
*control
)
871 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
872 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
873 struct ieee80211_if_conf conf
;
875 if (!local
->ops
->config_interface
|| !netif_running(dev
))
878 memset(&conf
, 0, sizeof(conf
));
879 conf
.type
= sdata
->vif
.type
;
880 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_STA
||
881 sdata
->vif
.type
== IEEE80211_IF_TYPE_IBSS
) {
882 conf
.bssid
= sdata
->u
.sta
.bssid
;
883 conf
.ssid
= sdata
->u
.sta
.ssid
;
884 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
885 } else if (sdata
->vif
.type
== IEEE80211_IF_TYPE_AP
) {
886 conf
.ssid
= sdata
->u
.ap
.ssid
;
887 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
888 conf
.beacon
= beacon
;
889 conf
.beacon_control
= control
;
891 return local
->ops
->config_interface(local_to_hw(local
),
895 int ieee80211_if_config(struct net_device
*dev
)
897 return __ieee80211_if_config(dev
, NULL
, NULL
);
900 int ieee80211_if_config_beacon(struct net_device
*dev
)
902 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
903 struct ieee80211_tx_control control
;
904 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
907 if (!(local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
909 skb
= ieee80211_beacon_get(local_to_hw(local
), &sdata
->vif
,
913 return __ieee80211_if_config(dev
, skb
, &control
);
916 int ieee80211_hw_config(struct ieee80211_local
*local
)
918 struct ieee80211_channel
*chan
;
921 if (local
->sta_sw_scanning
)
922 chan
= local
->scan_channel
;
924 chan
= local
->oper_channel
;
926 local
->hw
.conf
.channel
= chan
;
928 if (!local
->hw
.conf
.power_level
)
929 local
->hw
.conf
.power_level
= chan
->max_power
;
931 local
->hw
.conf
.power_level
= min(chan
->max_power
,
932 local
->hw
.conf
.power_level
);
934 local
->hw
.conf
.max_antenna_gain
= chan
->max_antenna_gain
;
936 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
937 printk(KERN_DEBUG
"%s: HW CONFIG: freq=%d\n",
938 wiphy_name(local
->hw
.wiphy
), chan
->center_freq
);
941 if (local
->open_count
)
942 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
948 * ieee80211_hw_config_ht should be used only after legacy configuration
949 * has been determined, as ht configuration depends upon the hardware's
950 * HT abilities for a _specific_ band.
952 int ieee80211_hw_config_ht(struct ieee80211_local
*local
, int enable_ht
,
953 struct ieee80211_ht_info
*req_ht_cap
,
954 struct ieee80211_ht_bss_info
*req_bss_cap
)
956 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
957 struct ieee80211_supported_band
*sband
;
960 sband
= local
->hw
.wiphy
->bands
[conf
->channel
->band
];
962 /* HT is not supported */
963 if (!sband
->ht_info
.ht_supported
) {
964 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
970 conf
->flags
&= ~IEEE80211_CONF_SUPPORT_HT_MODE
;
972 conf
->flags
|= IEEE80211_CONF_SUPPORT_HT_MODE
;
973 conf
->ht_conf
.cap
= req_ht_cap
->cap
& sband
->ht_info
.cap
;
974 conf
->ht_conf
.cap
&= ~(IEEE80211_HT_CAP_MIMO_PS
);
976 sband
->ht_info
.cap
& IEEE80211_HT_CAP_MIMO_PS
;
977 conf
->ht_bss_conf
.primary_channel
=
978 req_bss_cap
->primary_channel
;
979 conf
->ht_bss_conf
.bss_cap
= req_bss_cap
->bss_cap
;
980 conf
->ht_bss_conf
.bss_op_mode
= req_bss_cap
->bss_op_mode
;
981 for (i
= 0; i
< SUPP_MCS_SET_LEN
; i
++)
982 conf
->ht_conf
.supp_mcs_set
[i
] =
983 sband
->ht_info
.supp_mcs_set
[i
] &
984 req_ht_cap
->supp_mcs_set
[i
];
986 /* In STA mode, this gives us indication
987 * to the AP's mode of operation */
988 conf
->ht_conf
.ht_supported
= 1;
989 conf
->ht_conf
.ampdu_factor
= req_ht_cap
->ampdu_factor
;
990 conf
->ht_conf
.ampdu_density
= req_ht_cap
->ampdu_density
;
993 local
->ops
->conf_ht(local_to_hw(local
), &local
->hw
.conf
);
998 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
1001 struct ieee80211_local
*local
= sdata
->local
;
1006 if (local
->ops
->bss_info_changed
)
1007 local
->ops
->bss_info_changed(local_to_hw(local
),
1013 void ieee80211_reset_erp_info(struct net_device
*dev
)
1015 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1017 sdata
->bss_conf
.use_cts_prot
= 0;
1018 sdata
->bss_conf
.use_short_preamble
= 0;
1019 ieee80211_bss_info_change_notify(sdata
,
1020 BSS_CHANGED_ERP_CTS_PROT
|
1021 BSS_CHANGED_ERP_PREAMBLE
);
1024 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
1025 struct sk_buff
*skb
,
1026 struct ieee80211_tx_status
*status
)
1028 struct ieee80211_local
*local
= hw_to_local(hw
);
1029 struct ieee80211_tx_status
*saved
;
1032 skb
->dev
= local
->mdev
;
1033 saved
= kmalloc(sizeof(struct ieee80211_tx_status
), GFP_ATOMIC
);
1034 if (unlikely(!saved
)) {
1035 if (net_ratelimit())
1036 printk(KERN_WARNING
"%s: Not enough memory, "
1037 "dropping tx status", skb
->dev
->name
);
1038 /* should be dev_kfree_skb_irq, but due to this function being
1039 * named _irqsafe instead of just _irq we can't be sure that
1040 * people won't call it from non-irq contexts */
1041 dev_kfree_skb_any(skb
);
1044 memcpy(saved
, status
, sizeof(struct ieee80211_tx_status
));
1045 /* copy pointer to saved status into skb->cb for use by tasklet */
1046 memcpy(skb
->cb
, &saved
, sizeof(saved
));
1048 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
1049 skb_queue_tail(status
->control
.flags
& IEEE80211_TXCTL_REQ_TX_STATUS
?
1050 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
1051 tmp
= skb_queue_len(&local
->skb_queue
) +
1052 skb_queue_len(&local
->skb_queue_unreliable
);
1053 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
1054 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1055 memcpy(&saved
, skb
->cb
, sizeof(saved
));
1057 dev_kfree_skb_irq(skb
);
1059 I802_DEBUG_INC(local
->tx_status_drop
);
1061 tasklet_schedule(&local
->tasklet
);
1063 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
1065 static void ieee80211_tasklet_handler(unsigned long data
)
1067 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
1068 struct sk_buff
*skb
;
1069 struct ieee80211_rx_status rx_status
;
1070 struct ieee80211_tx_status
*tx_status
;
1071 struct ieee80211_ra_tid
*ra_tid
;
1073 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
1074 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
1075 switch (skb
->pkt_type
) {
1076 case IEEE80211_RX_MSG
:
1077 /* status is in skb->cb */
1078 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
1079 /* Clear skb->pkt_type in order to not confuse kernel
1082 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
1084 case IEEE80211_TX_STATUS_MSG
:
1085 /* get pointer to saved status out of skb->cb */
1086 memcpy(&tx_status
, skb
->cb
, sizeof(tx_status
));
1088 ieee80211_tx_status(local_to_hw(local
),
1092 case IEEE80211_DELBA_MSG
:
1093 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1094 ieee80211_stop_tx_ba_cb(local_to_hw(local
),
1095 ra_tid
->ra
, ra_tid
->tid
);
1098 case IEEE80211_ADDBA_MSG
:
1099 ra_tid
= (struct ieee80211_ra_tid
*) &skb
->cb
;
1100 ieee80211_start_tx_ba_cb(local_to_hw(local
),
1101 ra_tid
->ra
, ra_tid
->tid
);
1104 default: /* should never get here! */
1105 printk(KERN_ERR
"%s: Unknown message type (%d)\n",
1106 wiphy_name(local
->hw
.wiphy
), skb
->pkt_type
);
1113 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1114 * make a prepared TX frame (one that has been given to hw) to look like brand
1115 * new IEEE 802.11 frame that is ready to go through TX processing again.
1116 * Also, tx_packet_data in cb is restored from tx_control. */
1117 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
1118 struct ieee80211_key
*key
,
1119 struct sk_buff
*skb
,
1120 struct ieee80211_tx_control
*control
)
1122 int hdrlen
, iv_len
, mic_len
;
1123 struct ieee80211_tx_packet_data
*pkt_data
;
1125 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
1126 pkt_data
->ifindex
= vif_to_sdata(control
->vif
)->dev
->ifindex
;
1127 pkt_data
->flags
= 0;
1128 if (control
->flags
& IEEE80211_TXCTL_REQ_TX_STATUS
)
1129 pkt_data
->flags
|= IEEE80211_TXPD_REQ_TX_STATUS
;
1130 if (control
->flags
& IEEE80211_TXCTL_DO_NOT_ENCRYPT
)
1131 pkt_data
->flags
|= IEEE80211_TXPD_DO_NOT_ENCRYPT
;
1132 if (control
->flags
& IEEE80211_TXCTL_REQUEUE
)
1133 pkt_data
->flags
|= IEEE80211_TXPD_REQUEUE
;
1134 if (control
->flags
& IEEE80211_TXCTL_EAPOL_FRAME
)
1135 pkt_data
->flags
|= IEEE80211_TXPD_EAPOL_FRAME
;
1136 pkt_data
->queue
= control
->queue
;
1138 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1143 switch (key
->conf
.alg
) {
1145 iv_len
= WEP_IV_LEN
;
1146 mic_len
= WEP_ICV_LEN
;
1149 iv_len
= TKIP_IV_LEN
;
1150 mic_len
= TKIP_ICV_LEN
;
1153 iv_len
= CCMP_HDR_LEN
;
1154 mic_len
= CCMP_MIC_LEN
;
1160 if (skb
->len
>= mic_len
&&
1161 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
1162 skb_trim(skb
, skb
->len
- mic_len
);
1163 if (skb
->len
>= iv_len
&& skb
->len
> hdrlen
) {
1164 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
1165 skb_pull(skb
, iv_len
);
1170 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1171 u16 fc
= le16_to_cpu(hdr
->frame_control
);
1172 if ((fc
& 0x8C) == 0x88) /* QoS Control Field */ {
1173 fc
&= ~IEEE80211_STYPE_QOS_DATA
;
1174 hdr
->frame_control
= cpu_to_le16(fc
);
1175 memmove(skb
->data
+ 2, skb
->data
, hdrlen
- 2);
1181 static void ieee80211_handle_filtered_frame(struct ieee80211_local
*local
,
1182 struct sta_info
*sta
,
1183 struct sk_buff
*skb
,
1184 struct ieee80211_tx_status
*status
)
1186 sta
->tx_filtered_count
++;
1189 * Clear the TX filter mask for this STA when sending the next
1190 * packet. If the STA went to power save mode, this will happen
1191 * happen when it wakes up for the next time.
1193 sta
->flags
|= WLAN_STA_CLEAR_PS_FILT
;
1196 * This code races in the following way:
1198 * (1) STA sends frame indicating it will go to sleep and does so
1199 * (2) hardware/firmware adds STA to filter list, passes frame up
1200 * (3) hardware/firmware processes TX fifo and suppresses a frame
1201 * (4) we get TX status before having processed the frame and
1202 * knowing that the STA has gone to sleep.
1204 * This is actually quite unlikely even when both those events are
1205 * processed from interrupts coming in quickly after one another or
1206 * even at the same time because we queue both TX status events and
1207 * RX frames to be processed by a tasklet and process them in the
1208 * same order that they were received or TX status last. Hence, there
1209 * is no race as long as the frame RX is processed before the next TX
1210 * status, which drivers can ensure, see below.
1212 * Note that this can only happen if the hardware or firmware can
1213 * actually add STAs to the filter list, if this is done by the
1214 * driver in response to set_tim() (which will only reduce the race
1215 * this whole filtering tries to solve, not completely solve it)
1216 * this situation cannot happen.
1218 * To completely solve this race drivers need to make sure that they
1219 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1221 * (b) always process RX events before TX status events if ordering
1222 * can be unknown, for example with different interrupt status
1225 if (sta
->flags
& WLAN_STA_PS
&&
1226 skb_queue_len(&sta
->tx_filtered
) < STA_MAX_TX_BUFFER
) {
1227 ieee80211_remove_tx_extra(local
, sta
->key
, skb
,
1229 skb_queue_tail(&sta
->tx_filtered
, skb
);
1233 if (!(sta
->flags
& WLAN_STA_PS
) &&
1234 !(status
->control
.flags
& IEEE80211_TXCTL_REQUEUE
)) {
1235 /* Software retry the packet once */
1236 status
->control
.flags
|= IEEE80211_TXCTL_REQUEUE
;
1237 ieee80211_remove_tx_extra(local
, sta
->key
, skb
,
1239 dev_queue_xmit(skb
);
1243 if (net_ratelimit())
1244 printk(KERN_DEBUG
"%s: dropped TX filtered frame, "
1245 "queue_len=%d PS=%d @%lu\n",
1246 wiphy_name(local
->hw
.wiphy
),
1247 skb_queue_len(&sta
->tx_filtered
),
1248 !!(sta
->flags
& WLAN_STA_PS
), jiffies
);
1252 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
1253 struct ieee80211_tx_status
*status
)
1255 struct sk_buff
*skb2
;
1256 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1257 struct ieee80211_local
*local
= hw_to_local(hw
);
1259 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
1260 struct ieee80211_sub_if_data
*sdata
;
1261 struct net_device
*prev_dev
= NULL
;
1265 "%s: ieee80211_tx_status called with NULL status\n",
1266 wiphy_name(local
->hw
.wiphy
));
1271 if (status
->excessive_retries
) {
1272 struct sta_info
*sta
;
1273 sta
= sta_info_get(local
, hdr
->addr1
);
1275 if (sta
->flags
& WLAN_STA_PS
) {
1277 * The STA is in power save mode, so assume
1278 * that this TX packet failed because of that.
1280 status
->excessive_retries
= 0;
1281 status
->flags
|= IEEE80211_TX_STATUS_TX_FILTERED
;
1282 ieee80211_handle_filtered_frame(local
, sta
,
1291 if (status
->flags
& IEEE80211_TX_STATUS_TX_FILTERED
) {
1292 struct sta_info
*sta
;
1293 sta
= sta_info_get(local
, hdr
->addr1
);
1295 ieee80211_handle_filtered_frame(local
, sta
, skb
,
1301 rate_control_tx_status(local
->mdev
, skb
, status
);
1303 ieee80211_led_tx(local
, 0);
1306 * Fragments are passed to low-level drivers as separate skbs, so these
1307 * are actually fragments, not frames. Update frame counters only for
1308 * the first fragment of the frame. */
1310 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
1311 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
1313 if (status
->flags
& IEEE80211_TX_STATUS_ACK
) {
1315 local
->dot11TransmittedFrameCount
++;
1316 if (is_multicast_ether_addr(hdr
->addr1
))
1317 local
->dot11MulticastTransmittedFrameCount
++;
1318 if (status
->retry_count
> 0)
1319 local
->dot11RetryCount
++;
1320 if (status
->retry_count
> 1)
1321 local
->dot11MultipleRetryCount
++;
1324 /* This counter shall be incremented for an acknowledged MPDU
1325 * with an individual address in the address 1 field or an MPDU
1326 * with a multicast address in the address 1 field of type Data
1328 if (!is_multicast_ether_addr(hdr
->addr1
) ||
1329 type
== IEEE80211_FTYPE_DATA
||
1330 type
== IEEE80211_FTYPE_MGMT
)
1331 local
->dot11TransmittedFragmentCount
++;
1334 local
->dot11FailedCount
++;
1337 /* this was a transmitted frame, but now we want to reuse it */
1341 * This is a bit racy but we can avoid a lot of work
1344 if (!local
->monitors
&& !local
->cooked_mntrs
) {
1349 /* send frame to monitor interfaces now */
1351 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
1352 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
1357 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
1358 skb_push(skb
, sizeof(*rthdr
));
1360 memset(rthdr
, 0, sizeof(*rthdr
));
1361 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
1362 rthdr
->hdr
.it_present
=
1363 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
1364 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
1366 if (!(status
->flags
& IEEE80211_TX_STATUS_ACK
) &&
1367 !is_multicast_ether_addr(hdr
->addr1
))
1368 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
1370 if ((status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) &&
1371 (status
->control
.flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
))
1372 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
1373 else if (status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
)
1374 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
1376 rthdr
->data_retries
= status
->retry_count
;
1378 /* XXX: is this sufficient for BPF? */
1379 skb_set_mac_header(skb
, 0);
1380 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1381 skb
->pkt_type
= PACKET_OTHERHOST
;
1382 skb
->protocol
= htons(ETH_P_802_2
);
1383 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1386 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
1387 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MNTR
) {
1388 if (!netif_running(sdata
->dev
))
1392 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1394 skb2
->dev
= prev_dev
;
1399 prev_dev
= sdata
->dev
;
1403 skb
->dev
= prev_dev
;
1410 EXPORT_SYMBOL(ieee80211_tx_status
);
1412 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
1413 const struct ieee80211_ops
*ops
)
1415 struct ieee80211_local
*local
;
1417 struct wiphy
*wiphy
;
1419 /* Ensure 32-byte alignment of our private data and hw private data.
1420 * We use the wiphy priv data for both our ieee80211_local and for
1421 * the driver's private data
1423 * In memory it'll be like this:
1425 * +-------------------------+
1427 * +-------------------------+
1428 * | struct ieee80211_local |
1429 * +-------------------------+
1430 * | driver's private data |
1431 * +-------------------------+
1434 priv_size
= ((sizeof(struct ieee80211_local
) +
1435 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
1438 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
1443 wiphy
->privid
= mac80211_wiphy_privid
;
1445 local
= wiphy_priv(wiphy
);
1446 local
->hw
.wiphy
= wiphy
;
1448 local
->hw
.priv
= (char *)local
+
1449 ((sizeof(struct ieee80211_local
) +
1450 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
1453 BUG_ON(!ops
->start
);
1455 BUG_ON(!ops
->config
);
1456 BUG_ON(!ops
->add_interface
);
1457 BUG_ON(!ops
->remove_interface
);
1458 BUG_ON(!ops
->configure_filter
);
1461 local
->hw
.queues
= 1; /* default */
1463 local
->bridge_packets
= 1;
1465 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
1466 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
1467 local
->short_retry_limit
= 7;
1468 local
->long_retry_limit
= 4;
1469 local
->hw
.conf
.radio_enabled
= 1;
1471 INIT_LIST_HEAD(&local
->interfaces
);
1473 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
1475 sta_info_init(local
);
1477 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
1478 (unsigned long)local
);
1479 tasklet_disable(&local
->tx_pending_tasklet
);
1481 tasklet_init(&local
->tasklet
,
1482 ieee80211_tasklet_handler
,
1483 (unsigned long) local
);
1484 tasklet_disable(&local
->tasklet
);
1486 skb_queue_head_init(&local
->skb_queue
);
1487 skb_queue_head_init(&local
->skb_queue_unreliable
);
1489 return local_to_hw(local
);
1491 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1493 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1495 struct ieee80211_local
*local
= hw_to_local(hw
);
1498 enum ieee80211_band band
;
1499 struct net_device
*mdev
;
1500 struct ieee80211_sub_if_data
*sdata
;
1503 * generic code guarantees at least one band,
1504 * set this very early because much code assumes
1505 * that hw.conf.channel is assigned
1507 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1508 struct ieee80211_supported_band
*sband
;
1510 sband
= local
->hw
.wiphy
->bands
[band
];
1512 /* init channel we're on */
1513 local
->hw
.conf
.channel
=
1514 local
->oper_channel
=
1515 local
->scan_channel
= &sband
->channels
[0];
1520 result
= wiphy_register(local
->hw
.wiphy
);
1524 /* for now, mdev needs sub_if_data :/ */
1525 mdev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
),
1526 "wmaster%d", ether_setup
);
1528 goto fail_mdev_alloc
;
1530 sdata
= IEEE80211_DEV_TO_SUB_IF(mdev
);
1531 mdev
->ieee80211_ptr
= &sdata
->wdev
;
1532 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1536 ieee80211_rx_bss_list_init(mdev
);
1538 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
1539 mdev
->open
= ieee80211_master_open
;
1540 mdev
->stop
= ieee80211_master_stop
;
1541 mdev
->type
= ARPHRD_IEEE80211
;
1542 mdev
->header_ops
= &ieee80211_header_ops
;
1543 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
1545 sdata
->vif
.type
= IEEE80211_IF_TYPE_AP
;
1547 sdata
->local
= local
;
1548 sdata
->u
.ap
.force_unicast_rateidx
= -1;
1549 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
1550 ieee80211_if_sdata_init(sdata
);
1552 /* no RCU needed since we're still during init phase */
1553 list_add_tail(&sdata
->list
, &local
->interfaces
);
1555 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1556 local
->hw
.workqueue
= create_singlethread_workqueue(name
);
1557 if (!local
->hw
.workqueue
) {
1559 goto fail_workqueue
;
1563 * The hardware needs headroom for sending the frame,
1564 * and we need some headroom for passing the frame to monitor
1565 * interfaces, but never both at the same time.
1567 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1568 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1570 debugfs_hw_add(local
);
1572 local
->hw
.conf
.beacon_int
= 1000;
1574 local
->wstats_flags
|= local
->hw
.max_rssi
?
1575 IW_QUAL_LEVEL_UPDATED
: IW_QUAL_LEVEL_INVALID
;
1576 local
->wstats_flags
|= local
->hw
.max_signal
?
1577 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1578 local
->wstats_flags
|= local
->hw
.max_noise
?
1579 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1580 if (local
->hw
.max_rssi
< 0 || local
->hw
.max_noise
< 0)
1581 local
->wstats_flags
|= IW_QUAL_DBM
;
1583 result
= sta_info_start(local
);
1588 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1592 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1593 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1595 result
= register_netdevice(local
->mdev
);
1599 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1600 ieee80211_if_set_type(local
->mdev
, IEEE80211_IF_TYPE_AP
);
1602 result
= ieee80211_init_rate_ctrl_alg(local
,
1603 hw
->rate_control_algorithm
);
1605 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1606 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1610 result
= ieee80211_wep_init(local
);
1613 printk(KERN_DEBUG
"%s: Failed to initialize wep\n",
1614 wiphy_name(local
->hw
.wiphy
));
1618 ieee80211_install_qdisc(local
->mdev
);
1620 /* add one default STA interface */
1621 result
= ieee80211_if_add(local
->mdev
, "wlan%d", NULL
,
1622 IEEE80211_IF_TYPE_STA
);
1624 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1625 wiphy_name(local
->hw
.wiphy
));
1627 local
->reg_state
= IEEE80211_DEV_REGISTERED
;
1630 ieee80211_led_init(local
);
1635 rate_control_deinitialize(local
);
1637 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1638 unregister_netdevice(local
->mdev
);
1641 sta_info_stop(local
);
1643 debugfs_hw_del(local
);
1644 destroy_workqueue(local
->hw
.workqueue
);
1646 ieee80211_if_free(local
->mdev
);
1649 wiphy_unregister(local
->hw
.wiphy
);
1652 EXPORT_SYMBOL(ieee80211_register_hw
);
1654 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1656 struct ieee80211_local
*local
= hw_to_local(hw
);
1657 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1659 tasklet_kill(&local
->tx_pending_tasklet
);
1660 tasklet_kill(&local
->tasklet
);
1664 BUG_ON(local
->reg_state
!= IEEE80211_DEV_REGISTERED
);
1666 local
->reg_state
= IEEE80211_DEV_UNREGISTERED
;
1669 * At this point, interface list manipulations are fine
1670 * because the driver cannot be handing us frames any
1671 * more and the tasklet is killed.
1675 * First, we remove all non-master interfaces. Do this because they
1676 * may have bss pointer dependency on the master, and when we free
1677 * the master these would be freed as well, breaking our list
1678 * iteration completely.
1680 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1681 if (sdata
->dev
== local
->mdev
)
1683 list_del(&sdata
->list
);
1684 __ieee80211_if_del(local
, sdata
);
1687 /* then, finally, remove the master interface */
1688 __ieee80211_if_del(local
, IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1692 ieee80211_rx_bss_list_deinit(local
->mdev
);
1693 ieee80211_clear_tx_pending(local
);
1694 sta_info_stop(local
);
1695 rate_control_deinitialize(local
);
1696 debugfs_hw_del(local
);
1698 if (skb_queue_len(&local
->skb_queue
)
1699 || skb_queue_len(&local
->skb_queue_unreliable
))
1700 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1701 wiphy_name(local
->hw
.wiphy
));
1702 skb_queue_purge(&local
->skb_queue
);
1703 skb_queue_purge(&local
->skb_queue_unreliable
);
1705 destroy_workqueue(local
->hw
.workqueue
);
1706 wiphy_unregister(local
->hw
.wiphy
);
1707 ieee80211_wep_free(local
);
1708 ieee80211_led_exit(local
);
1709 ieee80211_if_free(local
->mdev
);
1712 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1714 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1716 struct ieee80211_local
*local
= hw_to_local(hw
);
1718 wiphy_free(local
->hw
.wiphy
);
1720 EXPORT_SYMBOL(ieee80211_free_hw
);
1722 static int __init
ieee80211_init(void)
1724 struct sk_buff
*skb
;
1727 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data
) > sizeof(skb
->cb
));
1729 ret
= rc80211_simple_init();
1733 ret
= rc80211_pid_init();
1735 goto out_cleanup_simple
;
1737 ret
= ieee80211_wme_register();
1739 printk(KERN_DEBUG
"ieee80211_init: failed to "
1740 "initialize WME (err=%d)\n", ret
);
1741 goto out_cleanup_pid
;
1744 ieee80211_debugfs_netdev_init();
1751 rc80211_simple_exit();
1756 static void __exit
ieee80211_exit(void)
1758 rc80211_simple_exit();
1761 ieee80211_wme_unregister();
1762 ieee80211_debugfs_netdev_exit();
1766 subsys_initcall(ieee80211_init
);
1767 module_exit(ieee80211_exit
);
1769 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1770 MODULE_LICENSE("GPL");