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 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
1182 struct ieee80211_tx_status
*status
)
1184 struct sk_buff
*skb2
;
1185 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1186 struct ieee80211_local
*local
= hw_to_local(hw
);
1188 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
1189 struct ieee80211_sub_if_data
*sdata
;
1190 struct net_device
*prev_dev
= NULL
;
1194 "%s: ieee80211_tx_status called with NULL status\n",
1195 wiphy_name(local
->hw
.wiphy
));
1200 if (status
->excessive_retries
) {
1201 struct sta_info
*sta
;
1202 sta
= sta_info_get(local
, hdr
->addr1
);
1204 if (sta
->flags
& WLAN_STA_PS
) {
1205 /* The STA is in power save mode, so assume
1206 * that this TX packet failed because of that.
1208 status
->excessive_retries
= 0;
1209 status
->flags
|= IEEE80211_TX_STATUS_TX_FILTERED
;
1215 if (status
->flags
& IEEE80211_TX_STATUS_TX_FILTERED
) {
1216 struct sta_info
*sta
;
1217 sta
= sta_info_get(local
, hdr
->addr1
);
1219 sta
->tx_filtered_count
++;
1221 /* Clear the TX filter mask for this STA when sending
1222 * the next packet. If the STA went to power save mode,
1223 * this will happen when it is waking up for the next
1225 sta
->clear_dst_mask
= 1;
1227 /* TODO: Is the WLAN_STA_PS flag always set here or is
1228 * the race between RX and TX status causing some
1229 * packets to be filtered out before 80211.o gets an
1230 * update for PS status? This seems to be the case, so
1231 * no changes are likely to be needed. */
1232 if (sta
->flags
& WLAN_STA_PS
&&
1233 skb_queue_len(&sta
->tx_filtered
) <
1234 STA_MAX_TX_BUFFER
) {
1235 ieee80211_remove_tx_extra(local
, sta
->key
,
1238 skb_queue_tail(&sta
->tx_filtered
, skb
);
1239 } else if (!(sta
->flags
& WLAN_STA_PS
) &&
1240 !(status
->control
.flags
& IEEE80211_TXCTL_REQUEUE
)) {
1241 /* Software retry the packet once */
1242 status
->control
.flags
|= IEEE80211_TXCTL_REQUEUE
;
1243 ieee80211_remove_tx_extra(local
, sta
->key
,
1246 dev_queue_xmit(skb
);
1248 if (net_ratelimit()) {
1249 printk(KERN_DEBUG
"%s: dropped TX "
1250 "filtered frame queue_len=%d "
1252 wiphy_name(local
->hw
.wiphy
),
1255 !!(sta
->flags
& WLAN_STA_PS
),
1264 rate_control_tx_status(local
->mdev
, skb
, status
);
1266 ieee80211_led_tx(local
, 0);
1269 * Fragments are passed to low-level drivers as separate skbs, so these
1270 * are actually fragments, not frames. Update frame counters only for
1271 * the first fragment of the frame. */
1273 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
1274 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
1276 if (status
->flags
& IEEE80211_TX_STATUS_ACK
) {
1278 local
->dot11TransmittedFrameCount
++;
1279 if (is_multicast_ether_addr(hdr
->addr1
))
1280 local
->dot11MulticastTransmittedFrameCount
++;
1281 if (status
->retry_count
> 0)
1282 local
->dot11RetryCount
++;
1283 if (status
->retry_count
> 1)
1284 local
->dot11MultipleRetryCount
++;
1287 /* This counter shall be incremented for an acknowledged MPDU
1288 * with an individual address in the address 1 field or an MPDU
1289 * with a multicast address in the address 1 field of type Data
1291 if (!is_multicast_ether_addr(hdr
->addr1
) ||
1292 type
== IEEE80211_FTYPE_DATA
||
1293 type
== IEEE80211_FTYPE_MGMT
)
1294 local
->dot11TransmittedFragmentCount
++;
1297 local
->dot11FailedCount
++;
1300 /* this was a transmitted frame, but now we want to reuse it */
1304 * This is a bit racy but we can avoid a lot of work
1307 if (!local
->monitors
&& !local
->cooked_mntrs
) {
1312 /* send frame to monitor interfaces now */
1314 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
1315 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
1320 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
1321 skb_push(skb
, sizeof(*rthdr
));
1323 memset(rthdr
, 0, sizeof(*rthdr
));
1324 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
1325 rthdr
->hdr
.it_present
=
1326 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
1327 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
1329 if (!(status
->flags
& IEEE80211_TX_STATUS_ACK
) &&
1330 !is_multicast_ether_addr(hdr
->addr1
))
1331 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
1333 if ((status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) &&
1334 (status
->control
.flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
))
1335 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
1336 else if (status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
)
1337 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
1339 rthdr
->data_retries
= status
->retry_count
;
1341 /* XXX: is this sufficient for BPF? */
1342 skb_set_mac_header(skb
, 0);
1343 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1344 skb
->pkt_type
= PACKET_OTHERHOST
;
1345 skb
->protocol
= htons(ETH_P_802_2
);
1346 memset(skb
->cb
, 0, sizeof(skb
->cb
));
1349 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
1350 if (sdata
->vif
.type
== IEEE80211_IF_TYPE_MNTR
) {
1351 if (!netif_running(sdata
->dev
))
1355 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1357 skb2
->dev
= prev_dev
;
1362 prev_dev
= sdata
->dev
;
1366 skb
->dev
= prev_dev
;
1373 EXPORT_SYMBOL(ieee80211_tx_status
);
1375 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
1376 const struct ieee80211_ops
*ops
)
1378 struct ieee80211_local
*local
;
1380 struct wiphy
*wiphy
;
1382 /* Ensure 32-byte alignment of our private data and hw private data.
1383 * We use the wiphy priv data for both our ieee80211_local and for
1384 * the driver's private data
1386 * In memory it'll be like this:
1388 * +-------------------------+
1390 * +-------------------------+
1391 * | struct ieee80211_local |
1392 * +-------------------------+
1393 * | driver's private data |
1394 * +-------------------------+
1397 priv_size
= ((sizeof(struct ieee80211_local
) +
1398 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
1401 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
1406 wiphy
->privid
= mac80211_wiphy_privid
;
1408 local
= wiphy_priv(wiphy
);
1409 local
->hw
.wiphy
= wiphy
;
1411 local
->hw
.priv
= (char *)local
+
1412 ((sizeof(struct ieee80211_local
) +
1413 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
1416 BUG_ON(!ops
->start
);
1418 BUG_ON(!ops
->config
);
1419 BUG_ON(!ops
->add_interface
);
1420 BUG_ON(!ops
->remove_interface
);
1421 BUG_ON(!ops
->configure_filter
);
1424 local
->hw
.queues
= 1; /* default */
1426 local
->bridge_packets
= 1;
1428 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
1429 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
1430 local
->short_retry_limit
= 7;
1431 local
->long_retry_limit
= 4;
1432 local
->hw
.conf
.radio_enabled
= 1;
1434 INIT_LIST_HEAD(&local
->interfaces
);
1436 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
1438 sta_info_init(local
);
1440 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
1441 (unsigned long)local
);
1442 tasklet_disable(&local
->tx_pending_tasklet
);
1444 tasklet_init(&local
->tasklet
,
1445 ieee80211_tasklet_handler
,
1446 (unsigned long) local
);
1447 tasklet_disable(&local
->tasklet
);
1449 skb_queue_head_init(&local
->skb_queue
);
1450 skb_queue_head_init(&local
->skb_queue_unreliable
);
1452 return local_to_hw(local
);
1454 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1456 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1458 struct ieee80211_local
*local
= hw_to_local(hw
);
1461 enum ieee80211_band band
;
1462 struct net_device
*mdev
;
1463 struct ieee80211_sub_if_data
*sdata
;
1466 * generic code guarantees at least one band,
1467 * set this very early because much code assumes
1468 * that hw.conf.channel is assigned
1470 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1471 struct ieee80211_supported_band
*sband
;
1473 sband
= local
->hw
.wiphy
->bands
[band
];
1475 /* init channel we're on */
1476 local
->hw
.conf
.channel
=
1477 local
->oper_channel
=
1478 local
->scan_channel
= &sband
->channels
[0];
1483 result
= wiphy_register(local
->hw
.wiphy
);
1487 /* for now, mdev needs sub_if_data :/ */
1488 mdev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
),
1489 "wmaster%d", ether_setup
);
1491 goto fail_mdev_alloc
;
1493 sdata
= IEEE80211_DEV_TO_SUB_IF(mdev
);
1494 mdev
->ieee80211_ptr
= &sdata
->wdev
;
1495 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1499 ieee80211_rx_bss_list_init(mdev
);
1501 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
1502 mdev
->open
= ieee80211_master_open
;
1503 mdev
->stop
= ieee80211_master_stop
;
1504 mdev
->type
= ARPHRD_IEEE80211
;
1505 mdev
->header_ops
= &ieee80211_header_ops
;
1506 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
1508 sdata
->vif
.type
= IEEE80211_IF_TYPE_AP
;
1510 sdata
->local
= local
;
1511 sdata
->u
.ap
.force_unicast_rateidx
= -1;
1512 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
1513 ieee80211_if_sdata_init(sdata
);
1515 /* no RCU needed since we're still during init phase */
1516 list_add_tail(&sdata
->list
, &local
->interfaces
);
1518 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1519 local
->hw
.workqueue
= create_singlethread_workqueue(name
);
1520 if (!local
->hw
.workqueue
) {
1522 goto fail_workqueue
;
1526 * The hardware needs headroom for sending the frame,
1527 * and we need some headroom for passing the frame to monitor
1528 * interfaces, but never both at the same time.
1530 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1531 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1533 debugfs_hw_add(local
);
1535 local
->hw
.conf
.beacon_int
= 1000;
1537 local
->wstats_flags
|= local
->hw
.max_rssi
?
1538 IW_QUAL_LEVEL_UPDATED
: IW_QUAL_LEVEL_INVALID
;
1539 local
->wstats_flags
|= local
->hw
.max_signal
?
1540 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1541 local
->wstats_flags
|= local
->hw
.max_noise
?
1542 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1543 if (local
->hw
.max_rssi
< 0 || local
->hw
.max_noise
< 0)
1544 local
->wstats_flags
|= IW_QUAL_DBM
;
1546 result
= sta_info_start(local
);
1551 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1555 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1556 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1558 result
= register_netdevice(local
->mdev
);
1562 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1563 ieee80211_if_set_type(local
->mdev
, IEEE80211_IF_TYPE_AP
);
1565 result
= ieee80211_init_rate_ctrl_alg(local
,
1566 hw
->rate_control_algorithm
);
1568 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1569 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1573 result
= ieee80211_wep_init(local
);
1576 printk(KERN_DEBUG
"%s: Failed to initialize wep\n",
1577 wiphy_name(local
->hw
.wiphy
));
1581 ieee80211_install_qdisc(local
->mdev
);
1583 /* add one default STA interface */
1584 result
= ieee80211_if_add(local
->mdev
, "wlan%d", NULL
,
1585 IEEE80211_IF_TYPE_STA
);
1587 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1588 wiphy_name(local
->hw
.wiphy
));
1590 local
->reg_state
= IEEE80211_DEV_REGISTERED
;
1593 ieee80211_led_init(local
);
1598 rate_control_deinitialize(local
);
1600 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1601 unregister_netdevice(local
->mdev
);
1604 sta_info_stop(local
);
1606 debugfs_hw_del(local
);
1607 destroy_workqueue(local
->hw
.workqueue
);
1609 ieee80211_if_free(local
->mdev
);
1612 wiphy_unregister(local
->hw
.wiphy
);
1615 EXPORT_SYMBOL(ieee80211_register_hw
);
1617 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1619 struct ieee80211_local
*local
= hw_to_local(hw
);
1620 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1622 tasklet_kill(&local
->tx_pending_tasklet
);
1623 tasklet_kill(&local
->tasklet
);
1627 BUG_ON(local
->reg_state
!= IEEE80211_DEV_REGISTERED
);
1629 local
->reg_state
= IEEE80211_DEV_UNREGISTERED
;
1632 * At this point, interface list manipulations are fine
1633 * because the driver cannot be handing us frames any
1634 * more and the tasklet is killed.
1638 * First, we remove all non-master interfaces. Do this because they
1639 * may have bss pointer dependency on the master, and when we free
1640 * the master these would be freed as well, breaking our list
1641 * iteration completely.
1643 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1644 if (sdata
->dev
== local
->mdev
)
1646 list_del(&sdata
->list
);
1647 __ieee80211_if_del(local
, sdata
);
1650 /* then, finally, remove the master interface */
1651 __ieee80211_if_del(local
, IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1655 ieee80211_rx_bss_list_deinit(local
->mdev
);
1656 ieee80211_clear_tx_pending(local
);
1657 sta_info_stop(local
);
1658 rate_control_deinitialize(local
);
1659 debugfs_hw_del(local
);
1661 if (skb_queue_len(&local
->skb_queue
)
1662 || skb_queue_len(&local
->skb_queue_unreliable
))
1663 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1664 wiphy_name(local
->hw
.wiphy
));
1665 skb_queue_purge(&local
->skb_queue
);
1666 skb_queue_purge(&local
->skb_queue_unreliable
);
1668 destroy_workqueue(local
->hw
.workqueue
);
1669 wiphy_unregister(local
->hw
.wiphy
);
1670 ieee80211_wep_free(local
);
1671 ieee80211_led_exit(local
);
1672 ieee80211_if_free(local
->mdev
);
1675 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1677 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1679 struct ieee80211_local
*local
= hw_to_local(hw
);
1681 wiphy_free(local
->hw
.wiphy
);
1683 EXPORT_SYMBOL(ieee80211_free_hw
);
1685 static int __init
ieee80211_init(void)
1687 struct sk_buff
*skb
;
1690 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data
) > sizeof(skb
->cb
));
1692 ret
= rc80211_simple_init();
1696 ret
= rc80211_pid_init();
1698 goto out_cleanup_simple
;
1700 ret
= ieee80211_wme_register();
1702 printk(KERN_DEBUG
"ieee80211_init: failed to "
1703 "initialize WME (err=%d)\n", ret
);
1704 goto out_cleanup_pid
;
1707 ieee80211_debugfs_netdev_init();
1714 rc80211_simple_exit();
1719 static void __exit
ieee80211_exit(void)
1721 rc80211_simple_exit();
1724 ieee80211_wme_unregister();
1725 ieee80211_debugfs_netdev_exit();
1729 subsys_initcall(ieee80211_init
);
1730 module_exit(ieee80211_exit
);
1732 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1733 MODULE_LICENSE("GPL");