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/cfg80211.h>
26 #include "ieee80211_i.h"
27 #include "ieee80211_rate.h"
31 #include "ieee80211_led.h"
34 #include "debugfs_netdev.h"
37 * For seeing transmitted packets on monitor interfaces
38 * we have a radiotap header too.
40 struct ieee80211_tx_status_rtap_hdr
{
41 struct ieee80211_radiotap_header hdr
;
44 } __attribute__ ((packed
));
46 /* common interface routines */
48 static int header_parse_80211(struct sk_buff
*skb
, unsigned char *haddr
)
50 memcpy(haddr
, skb_mac_header(skb
) + 10, ETH_ALEN
); /* addr2 */
54 /* must be called under mdev tx lock */
55 static void ieee80211_configure_filter(struct ieee80211_local
*local
)
57 unsigned int changed_flags
;
58 unsigned int new_flags
= 0;
60 if (atomic_read(&local
->iff_promiscs
))
61 new_flags
|= FIF_PROMISC_IN_BSS
;
63 if (atomic_read(&local
->iff_allmultis
))
64 new_flags
|= FIF_ALLMULTI
;
67 new_flags
|= FIF_CONTROL
|
69 FIF_BCN_PRBRESP_PROMISC
;
71 changed_flags
= local
->filter_flags
^ new_flags
;
76 local
->ops
->configure_filter(local_to_hw(local
),
77 changed_flags
, &new_flags
,
78 local
->mdev
->mc_count
,
79 local
->mdev
->mc_list
);
81 WARN_ON(new_flags
& (1<<31));
83 local
->filter_flags
= new_flags
& ~(1<<31);
86 /* master interface */
88 static int ieee80211_master_open(struct net_device
*dev
)
90 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
91 struct ieee80211_sub_if_data
*sdata
;
92 int res
= -EOPNOTSUPP
;
94 /* we hold the RTNL here so can safely walk the list */
95 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
96 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
)) {
104 static int ieee80211_master_stop(struct net_device
*dev
)
106 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
107 struct ieee80211_sub_if_data
*sdata
;
109 /* we hold the RTNL here so can safely walk the list */
110 list_for_each_entry(sdata
, &local
->interfaces
, list
)
111 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
))
112 dev_close(sdata
->dev
);
117 static void ieee80211_master_set_multicast_list(struct net_device
*dev
)
119 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
121 ieee80211_configure_filter(local
);
124 /* regular interfaces */
126 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
128 /* FIX: what would be proper limits for MTU?
129 * This interface uses 802.3 frames. */
130 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6) {
131 printk(KERN_WARNING
"%s: invalid MTU %d\n",
136 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
137 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
138 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
143 static inline int identical_mac_addr_allowed(int type1
, int type2
)
145 return (type1
== IEEE80211_IF_TYPE_MNTR
||
146 type2
== IEEE80211_IF_TYPE_MNTR
||
147 (type1
== IEEE80211_IF_TYPE_AP
&&
148 type2
== IEEE80211_IF_TYPE_WDS
) ||
149 (type1
== IEEE80211_IF_TYPE_WDS
&&
150 (type2
== IEEE80211_IF_TYPE_WDS
||
151 type2
== IEEE80211_IF_TYPE_AP
)) ||
152 (type1
== IEEE80211_IF_TYPE_AP
&&
153 type2
== IEEE80211_IF_TYPE_VLAN
) ||
154 (type1
== IEEE80211_IF_TYPE_VLAN
&&
155 (type2
== IEEE80211_IF_TYPE_AP
||
156 type2
== IEEE80211_IF_TYPE_VLAN
)));
159 static int ieee80211_open(struct net_device
*dev
)
161 struct ieee80211_sub_if_data
*sdata
, *nsdata
;
162 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
163 struct ieee80211_if_init_conf conf
;
166 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
168 /* we hold the RTNL here so can safely walk the list */
169 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
170 struct net_device
*ndev
= nsdata
->dev
;
172 if (ndev
!= dev
&& ndev
!= local
->mdev
&& netif_running(ndev
) &&
173 compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
) == 0) {
175 * check whether it may have the same address
177 if (!identical_mac_addr_allowed(sdata
->type
,
182 * can only add VLANs to enabled APs
184 if (sdata
->type
== IEEE80211_IF_TYPE_VLAN
&&
185 nsdata
->type
== IEEE80211_IF_TYPE_AP
&&
186 netif_running(nsdata
->dev
))
187 sdata
->u
.vlan
.ap
= nsdata
;
191 switch (sdata
->type
) {
192 case IEEE80211_IF_TYPE_WDS
:
193 if (is_zero_ether_addr(sdata
->u
.wds
.remote_addr
))
196 case IEEE80211_IF_TYPE_VLAN
:
197 if (!sdata
->u
.vlan
.ap
)
200 case IEEE80211_IF_TYPE_AP
:
201 case IEEE80211_IF_TYPE_STA
:
202 case IEEE80211_IF_TYPE_MNTR
:
203 case IEEE80211_IF_TYPE_IBSS
:
204 /* no special treatment */
206 case IEEE80211_IF_TYPE_INVALID
:
212 if (local
->open_count
== 0) {
214 if (local
->ops
->start
)
215 res
= local
->ops
->start(local_to_hw(local
));
220 switch (sdata
->type
) {
221 case IEEE80211_IF_TYPE_VLAN
:
222 list_add(&sdata
->u
.vlan
.list
, &sdata
->u
.vlan
.ap
->u
.ap
.vlans
);
223 /* no need to tell driver */
225 case IEEE80211_IF_TYPE_MNTR
:
226 /* must be before the call to ieee80211_configure_filter */
228 if (local
->monitors
== 1) {
229 netif_tx_lock_bh(local
->mdev
);
230 ieee80211_configure_filter(local
);
231 netif_tx_unlock_bh(local
->mdev
);
233 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
234 ieee80211_hw_config(local
);
237 case IEEE80211_IF_TYPE_STA
:
238 case IEEE80211_IF_TYPE_IBSS
:
239 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
242 conf
.if_id
= dev
->ifindex
;
243 conf
.type
= sdata
->type
;
244 conf
.mac_addr
= dev
->dev_addr
;
245 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
246 if (res
&& !local
->open_count
&& local
->ops
->stop
)
247 local
->ops
->stop(local_to_hw(local
));
251 ieee80211_if_config(dev
);
252 ieee80211_reset_erp_info(dev
);
253 ieee80211_enable_keys(sdata
);
255 if (sdata
->type
== IEEE80211_IF_TYPE_STA
&&
256 !(sdata
->flags
& IEEE80211_SDATA_USERSPACE_MLME
))
257 netif_carrier_off(dev
);
259 netif_carrier_on(dev
);
262 if (local
->open_count
== 0) {
263 res
= dev_open(local
->mdev
);
265 tasklet_enable(&local
->tx_pending_tasklet
);
266 tasklet_enable(&local
->tasklet
);
271 netif_start_queue(dev
);
276 static int ieee80211_stop(struct net_device
*dev
)
278 struct ieee80211_sub_if_data
*sdata
;
279 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
280 struct ieee80211_if_init_conf conf
;
282 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
284 netif_stop_queue(dev
);
286 dev_mc_unsync(local
->mdev
, dev
);
288 /* down all dependent devices, that is VLANs */
289 if (sdata
->type
== IEEE80211_IF_TYPE_AP
) {
290 struct ieee80211_sub_if_data
*vlan
, *tmp
;
292 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
294 dev_close(vlan
->dev
);
295 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
300 switch (sdata
->type
) {
301 case IEEE80211_IF_TYPE_VLAN
:
302 list_del(&sdata
->u
.vlan
.list
);
303 sdata
->u
.vlan
.ap
= NULL
;
304 /* no need to tell driver */
306 case IEEE80211_IF_TYPE_MNTR
:
308 if (local
->monitors
== 0) {
309 netif_tx_lock_bh(local
->mdev
);
310 ieee80211_configure_filter(local
);
311 netif_tx_unlock_bh(local
->mdev
);
313 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
314 ieee80211_hw_config(local
);
317 case IEEE80211_IF_TYPE_STA
:
318 case IEEE80211_IF_TYPE_IBSS
:
319 sdata
->u
.sta
.state
= IEEE80211_DISABLED
;
320 del_timer_sync(&sdata
->u
.sta
.timer
);
322 * When we get here, the interface is marked down.
323 * Call synchronize_rcu() to wait for the RX path
324 * should it be using the interface and enqueuing
325 * frames at this very time on another CPU.
328 skb_queue_purge(&sdata
->u
.sta
.skb_queue
);
330 if (!local
->ops
->hw_scan
&&
331 local
->scan_dev
== sdata
->dev
) {
332 local
->sta_scanning
= 0;
333 cancel_delayed_work(&local
->scan_work
);
335 flush_workqueue(local
->hw
.workqueue
);
338 conf
.if_id
= dev
->ifindex
;
339 conf
.type
= sdata
->type
;
340 conf
.mac_addr
= dev
->dev_addr
;
341 /* disable all keys for as long as this netdev is down */
342 ieee80211_disable_keys(sdata
);
343 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
346 if (local
->open_count
== 0) {
347 if (netif_running(local
->mdev
))
348 dev_close(local
->mdev
);
350 if (local
->ops
->stop
)
351 local
->ops
->stop(local_to_hw(local
));
353 tasklet_disable(&local
->tx_pending_tasklet
);
354 tasklet_disable(&local
->tasklet
);
360 static void ieee80211_set_multicast_list(struct net_device
*dev
)
362 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
363 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
364 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
366 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
367 promisc
= !!(dev
->flags
& IFF_PROMISC
);
368 sdata_allmulti
= sdata
->flags
& IEEE80211_SDATA_ALLMULTI
;
369 sdata_promisc
= sdata
->flags
& IEEE80211_SDATA_PROMISC
;
371 if (allmulti
!= sdata_allmulti
) {
372 if (dev
->flags
& IFF_ALLMULTI
)
373 atomic_inc(&local
->iff_allmultis
);
375 atomic_dec(&local
->iff_allmultis
);
376 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
379 if (promisc
!= sdata_promisc
) {
380 if (dev
->flags
& IFF_PROMISC
)
381 atomic_inc(&local
->iff_promiscs
);
383 atomic_dec(&local
->iff_promiscs
);
384 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
387 dev_mc_sync(local
->mdev
, dev
);
390 /* Must not be called for mdev */
391 void ieee80211_if_setup(struct net_device
*dev
)
394 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
395 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
396 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
397 dev
->change_mtu
= ieee80211_change_mtu
;
398 dev
->open
= ieee80211_open
;
399 dev
->stop
= ieee80211_stop
;
400 dev
->destructor
= ieee80211_if_free
;
403 /* WDS specialties */
405 int ieee80211_if_update_wds(struct net_device
*dev
, u8
*remote_addr
)
407 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
408 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
409 struct sta_info
*sta
;
411 if (compare_ether_addr(remote_addr
, sdata
->u
.wds
.remote_addr
) == 0)
414 /* Create STA entry for the new peer */
415 sta
= sta_info_add(local
, dev
, remote_addr
, GFP_KERNEL
);
420 /* Remove STA entry for the old peer */
421 sta
= sta_info_get(local
, sdata
->u
.wds
.remote_addr
);
426 printk(KERN_DEBUG
"%s: could not find STA entry for WDS link "
427 "peer " MAC_FMT
"\n",
428 dev
->name
, MAC_ARG(sdata
->u
.wds
.remote_addr
));
431 /* Update WDS link data */
432 memcpy(&sdata
->u
.wds
.remote_addr
, remote_addr
, ETH_ALEN
);
437 /* everything else */
439 static int __ieee80211_if_config(struct net_device
*dev
,
440 struct sk_buff
*beacon
,
441 struct ieee80211_tx_control
*control
)
443 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
444 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
445 struct ieee80211_if_conf conf
;
447 if (!local
->ops
->config_interface
|| !netif_running(dev
))
450 memset(&conf
, 0, sizeof(conf
));
451 conf
.type
= sdata
->type
;
452 if (sdata
->type
== IEEE80211_IF_TYPE_STA
||
453 sdata
->type
== IEEE80211_IF_TYPE_IBSS
) {
454 conf
.bssid
= sdata
->u
.sta
.bssid
;
455 conf
.ssid
= sdata
->u
.sta
.ssid
;
456 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
457 } else if (sdata
->type
== IEEE80211_IF_TYPE_AP
) {
458 conf
.ssid
= sdata
->u
.ap
.ssid
;
459 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
460 conf
.beacon
= beacon
;
461 conf
.beacon_control
= control
;
463 return local
->ops
->config_interface(local_to_hw(local
),
464 dev
->ifindex
, &conf
);
467 int ieee80211_if_config(struct net_device
*dev
)
469 return __ieee80211_if_config(dev
, NULL
, NULL
);
472 int ieee80211_if_config_beacon(struct net_device
*dev
)
474 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
475 struct ieee80211_tx_control control
;
478 if (!(local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
480 skb
= ieee80211_beacon_get(local_to_hw(local
), dev
->ifindex
, &control
);
483 return __ieee80211_if_config(dev
, skb
, &control
);
486 int ieee80211_hw_config(struct ieee80211_local
*local
)
488 struct ieee80211_hw_mode
*mode
;
489 struct ieee80211_channel
*chan
;
492 if (local
->sta_scanning
) {
493 chan
= local
->scan_channel
;
494 mode
= local
->scan_hw_mode
;
496 chan
= local
->oper_channel
;
497 mode
= local
->oper_hw_mode
;
500 local
->hw
.conf
.channel
= chan
->chan
;
501 local
->hw
.conf
.channel_val
= chan
->val
;
502 if (!local
->hw
.conf
.power_level
) {
503 local
->hw
.conf
.power_level
= chan
->power_level
;
505 local
->hw
.conf
.power_level
= min(chan
->power_level
,
506 local
->hw
.conf
.power_level
);
508 local
->hw
.conf
.freq
= chan
->freq
;
509 local
->hw
.conf
.phymode
= mode
->mode
;
510 local
->hw
.conf
.antenna_max
= chan
->antenna_max
;
511 local
->hw
.conf
.chan
= chan
;
512 local
->hw
.conf
.mode
= mode
;
514 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
515 printk(KERN_DEBUG
"HW CONFIG: channel=%d freq=%d "
516 "phymode=%d\n", local
->hw
.conf
.channel
, local
->hw
.conf
.freq
,
517 local
->hw
.conf
.phymode
);
518 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
520 if (local
->open_count
)
521 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
526 void ieee80211_erp_info_change_notify(struct net_device
*dev
, u8 changes
)
528 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
529 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
530 if (local
->ops
->erp_ie_changed
)
531 local
->ops
->erp_ie_changed(local_to_hw(local
), changes
,
532 !!(sdata
->flags
& IEEE80211_SDATA_USE_PROTECTION
),
533 !(sdata
->flags
& IEEE80211_SDATA_SHORT_PREAMBLE
));
536 void ieee80211_reset_erp_info(struct net_device
*dev
)
538 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
540 sdata
->flags
&= ~(IEEE80211_SDATA_USE_PROTECTION
|
541 IEEE80211_SDATA_SHORT_PREAMBLE
);
542 ieee80211_erp_info_change_notify(dev
,
543 IEEE80211_ERP_CHANGE_PROTECTION
|
544 IEEE80211_ERP_CHANGE_PREAMBLE
);
547 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
549 struct ieee80211_tx_status
*status
)
551 struct ieee80211_local
*local
= hw_to_local(hw
);
552 struct ieee80211_tx_status
*saved
;
555 skb
->dev
= local
->mdev
;
556 saved
= kmalloc(sizeof(struct ieee80211_tx_status
), GFP_ATOMIC
);
557 if (unlikely(!saved
)) {
559 printk(KERN_WARNING
"%s: Not enough memory, "
560 "dropping tx status", skb
->dev
->name
);
561 /* should be dev_kfree_skb_irq, but due to this function being
562 * named _irqsafe instead of just _irq we can't be sure that
563 * people won't call it from non-irq contexts */
564 dev_kfree_skb_any(skb
);
567 memcpy(saved
, status
, sizeof(struct ieee80211_tx_status
));
568 /* copy pointer to saved status into skb->cb for use by tasklet */
569 memcpy(skb
->cb
, &saved
, sizeof(saved
));
571 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
572 skb_queue_tail(status
->control
.flags
& IEEE80211_TXCTL_REQ_TX_STATUS
?
573 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
574 tmp
= skb_queue_len(&local
->skb_queue
) +
575 skb_queue_len(&local
->skb_queue_unreliable
);
576 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
577 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
578 memcpy(&saved
, skb
->cb
, sizeof(saved
));
580 dev_kfree_skb_irq(skb
);
582 I802_DEBUG_INC(local
->tx_status_drop
);
584 tasklet_schedule(&local
->tasklet
);
586 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
588 static void ieee80211_tasklet_handler(unsigned long data
)
590 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
592 struct ieee80211_rx_status rx_status
;
593 struct ieee80211_tx_status
*tx_status
;
595 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
596 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
597 switch (skb
->pkt_type
) {
598 case IEEE80211_RX_MSG
:
599 /* status is in skb->cb */
600 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
601 /* Clear skb->type in order to not confuse kernel
604 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
606 case IEEE80211_TX_STATUS_MSG
:
607 /* get pointer to saved status out of skb->cb */
608 memcpy(&tx_status
, skb
->cb
, sizeof(tx_status
));
610 ieee80211_tx_status(local_to_hw(local
),
614 default: /* should never get here! */
615 printk(KERN_ERR
"%s: Unknown message type (%d)\n",
616 wiphy_name(local
->hw
.wiphy
), skb
->pkt_type
);
623 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
624 * make a prepared TX frame (one that has been given to hw) to look like brand
625 * new IEEE 802.11 frame that is ready to go through TX processing again.
626 * Also, tx_packet_data in cb is restored from tx_control. */
627 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
628 struct ieee80211_key
*key
,
630 struct ieee80211_tx_control
*control
)
632 int hdrlen
, iv_len
, mic_len
;
633 struct ieee80211_tx_packet_data
*pkt_data
;
635 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
636 pkt_data
->ifindex
= control
->ifindex
;
638 if (control
->flags
& IEEE80211_TXCTL_REQ_TX_STATUS
)
639 pkt_data
->flags
|= IEEE80211_TXPD_REQ_TX_STATUS
;
640 if (control
->flags
& IEEE80211_TXCTL_DO_NOT_ENCRYPT
)
641 pkt_data
->flags
|= IEEE80211_TXPD_DO_NOT_ENCRYPT
;
642 if (control
->flags
& IEEE80211_TXCTL_REQUEUE
)
643 pkt_data
->flags
|= IEEE80211_TXPD_REQUEUE
;
644 pkt_data
->queue
= control
->queue
;
646 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
651 switch (key
->conf
.alg
) {
654 mic_len
= WEP_ICV_LEN
;
657 iv_len
= TKIP_IV_LEN
;
658 mic_len
= TKIP_ICV_LEN
;
661 iv_len
= CCMP_HDR_LEN
;
662 mic_len
= CCMP_MIC_LEN
;
668 if (skb
->len
>= mic_len
&&
669 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
670 skb_trim(skb
, skb
->len
- mic_len
);
671 if (skb
->len
>= iv_len
&& skb
->len
> hdrlen
) {
672 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
673 skb_pull(skb
, iv_len
);
678 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
679 u16 fc
= le16_to_cpu(hdr
->frame_control
);
680 if ((fc
& 0x8C) == 0x88) /* QoS Control Field */ {
681 fc
&= ~IEEE80211_STYPE_QOS_DATA
;
682 hdr
->frame_control
= cpu_to_le16(fc
);
683 memmove(skb
->data
+ 2, skb
->data
, hdrlen
- 2);
689 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
690 struct ieee80211_tx_status
*status
)
692 struct sk_buff
*skb2
;
693 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
694 struct ieee80211_local
*local
= hw_to_local(hw
);
696 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
697 struct ieee80211_sub_if_data
*sdata
;
702 "%s: ieee80211_tx_status called with NULL status\n",
703 wiphy_name(local
->hw
.wiphy
));
708 if (status
->excessive_retries
) {
709 struct sta_info
*sta
;
710 sta
= sta_info_get(local
, hdr
->addr1
);
712 if (sta
->flags
& WLAN_STA_PS
) {
713 /* The STA is in power save mode, so assume
714 * that this TX packet failed because of that.
716 status
->excessive_retries
= 0;
717 status
->flags
|= IEEE80211_TX_STATUS_TX_FILTERED
;
723 if (status
->flags
& IEEE80211_TX_STATUS_TX_FILTERED
) {
724 struct sta_info
*sta
;
725 sta
= sta_info_get(local
, hdr
->addr1
);
727 sta
->tx_filtered_count
++;
729 /* Clear the TX filter mask for this STA when sending
730 * the next packet. If the STA went to power save mode,
731 * this will happen when it is waking up for the next
733 sta
->clear_dst_mask
= 1;
735 /* TODO: Is the WLAN_STA_PS flag always set here or is
736 * the race between RX and TX status causing some
737 * packets to be filtered out before 80211.o gets an
738 * update for PS status? This seems to be the case, so
739 * no changes are likely to be needed. */
740 if (sta
->flags
& WLAN_STA_PS
&&
741 skb_queue_len(&sta
->tx_filtered
) <
743 ieee80211_remove_tx_extra(local
, sta
->key
,
746 skb_queue_tail(&sta
->tx_filtered
, skb
);
747 } else if (!(sta
->flags
& WLAN_STA_PS
) &&
748 !(status
->control
.flags
& IEEE80211_TXCTL_REQUEUE
)) {
749 /* Software retry the packet once */
750 status
->control
.flags
|= IEEE80211_TXCTL_REQUEUE
;
751 ieee80211_remove_tx_extra(local
, sta
->key
,
756 if (net_ratelimit()) {
757 printk(KERN_DEBUG
"%s: dropped TX "
758 "filtered frame queue_len=%d "
760 wiphy_name(local
->hw
.wiphy
),
763 !!(sta
->flags
& WLAN_STA_PS
),
772 /* FIXME: STUPID to call this with both local and local->mdev */
773 rate_control_tx_status(local
, local
->mdev
, skb
, status
);
776 ieee80211_led_tx(local
, 0);
779 * Fragments are passed to low-level drivers as separate skbs, so these
780 * are actually fragments, not frames. Update frame counters only for
781 * the first fragment of the frame. */
783 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
784 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
786 if (status
->flags
& IEEE80211_TX_STATUS_ACK
) {
788 local
->dot11TransmittedFrameCount
++;
789 if (is_multicast_ether_addr(hdr
->addr1
))
790 local
->dot11MulticastTransmittedFrameCount
++;
791 if (status
->retry_count
> 0)
792 local
->dot11RetryCount
++;
793 if (status
->retry_count
> 1)
794 local
->dot11MultipleRetryCount
++;
797 /* This counter shall be incremented for an acknowledged MPDU
798 * with an individual address in the address 1 field or an MPDU
799 * with a multicast address in the address 1 field of type Data
801 if (!is_multicast_ether_addr(hdr
->addr1
) ||
802 type
== IEEE80211_FTYPE_DATA
||
803 type
== IEEE80211_FTYPE_MGMT
)
804 local
->dot11TransmittedFragmentCount
++;
807 local
->dot11FailedCount
++;
810 /* this was a transmitted frame, but now we want to reuse it */
813 if (!local
->monitors
) {
818 /* send frame to monitor interfaces now */
820 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
821 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
826 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
827 skb_push(skb
, sizeof(*rthdr
));
829 memset(rthdr
, 0, sizeof(*rthdr
));
830 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
831 rthdr
->hdr
.it_present
=
832 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
833 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
835 if (!(status
->flags
& IEEE80211_TX_STATUS_ACK
) &&
836 !is_multicast_ether_addr(hdr
->addr1
))
837 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
839 if ((status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) &&
840 (status
->control
.flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
))
841 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
842 else if (status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
)
843 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
845 rthdr
->data_retries
= status
->retry_count
;
848 monitors
= local
->monitors
;
849 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
851 * Using the monitors counter is possibly racy, but
852 * if the value is wrong we simply either clone the skb
853 * once too much or forget sending it to one monitor iface
854 * The latter case isn't nice but fixing the race is much
857 if (!monitors
|| !skb
)
860 if (sdata
->type
== IEEE80211_IF_TYPE_MNTR
) {
861 if (!netif_running(sdata
->dev
))
865 skb2
= skb_clone(skb
, GFP_ATOMIC
);
868 skb
->dev
= sdata
->dev
;
869 /* XXX: is this sufficient for BPF? */
870 skb_set_mac_header(skb
, 0);
871 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
872 skb
->pkt_type
= PACKET_OTHERHOST
;
873 skb
->protocol
= htons(ETH_P_802_2
);
874 memset(skb
->cb
, 0, sizeof(skb
->cb
));
884 EXPORT_SYMBOL(ieee80211_tx_status
);
886 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
887 const struct ieee80211_ops
*ops
)
889 struct net_device
*mdev
;
890 struct ieee80211_local
*local
;
891 struct ieee80211_sub_if_data
*sdata
;
895 /* Ensure 32-byte alignment of our private data and hw private data.
896 * We use the wiphy priv data for both our ieee80211_local and for
897 * the driver's private data
899 * In memory it'll be like this:
901 * +-------------------------+
903 * +-------------------------+
904 * | struct ieee80211_local |
905 * +-------------------------+
906 * | driver's private data |
907 * +-------------------------+
910 priv_size
= ((sizeof(struct ieee80211_local
) +
911 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
914 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
919 wiphy
->privid
= mac80211_wiphy_privid
;
921 local
= wiphy_priv(wiphy
);
922 local
->hw
.wiphy
= wiphy
;
924 local
->hw
.priv
= (char *)local
+
925 ((sizeof(struct ieee80211_local
) +
926 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
931 BUG_ON(!ops
->config
);
932 BUG_ON(!ops
->add_interface
);
933 BUG_ON(!ops
->remove_interface
);
934 BUG_ON(!ops
->configure_filter
);
937 /* for now, mdev needs sub_if_data :/ */
938 mdev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
),
939 "wmaster%d", ether_setup
);
945 sdata
= IEEE80211_DEV_TO_SUB_IF(mdev
);
946 mdev
->ieee80211_ptr
= &sdata
->wdev
;
947 sdata
->wdev
.wiphy
= wiphy
;
949 local
->hw
.queues
= 1; /* default */
952 local
->rx_pre_handlers
= ieee80211_rx_pre_handlers
;
953 local
->rx_handlers
= ieee80211_rx_handlers
;
954 local
->tx_handlers
= ieee80211_tx_handlers
;
956 local
->bridge_packets
= 1;
958 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
959 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
960 local
->short_retry_limit
= 7;
961 local
->long_retry_limit
= 4;
962 local
->hw
.conf
.radio_enabled
= 1;
964 local
->enabled_modes
= ~0;
966 INIT_LIST_HEAD(&local
->modes_list
);
968 INIT_LIST_HEAD(&local
->interfaces
);
970 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
971 ieee80211_rx_bss_list_init(mdev
);
973 sta_info_init(local
);
975 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
976 mdev
->open
= ieee80211_master_open
;
977 mdev
->stop
= ieee80211_master_stop
;
978 mdev
->type
= ARPHRD_IEEE80211
;
979 mdev
->hard_header_parse
= header_parse_80211
;
980 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
982 sdata
->type
= IEEE80211_IF_TYPE_AP
;
984 sdata
->local
= local
;
985 sdata
->u
.ap
.force_unicast_rateidx
= -1;
986 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
987 ieee80211_if_sdata_init(sdata
);
988 /* no RCU needed since we're still during init phase */
989 list_add_tail(&sdata
->list
, &local
->interfaces
);
991 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
992 (unsigned long)local
);
993 tasklet_disable(&local
->tx_pending_tasklet
);
995 tasklet_init(&local
->tasklet
,
996 ieee80211_tasklet_handler
,
997 (unsigned long) local
);
998 tasklet_disable(&local
->tasklet
);
1000 skb_queue_head_init(&local
->skb_queue
);
1001 skb_queue_head_init(&local
->skb_queue_unreliable
);
1003 return local_to_hw(local
);
1005 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1007 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1009 struct ieee80211_local
*local
= hw_to_local(hw
);
1013 result
= wiphy_register(local
->hw
.wiphy
);
1017 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1018 local
->hw
.workqueue
= create_singlethread_workqueue(name
);
1019 if (!local
->hw
.workqueue
) {
1021 goto fail_workqueue
;
1025 * The hardware needs headroom for sending the frame,
1026 * and we need some headroom for passing the frame to monitor
1027 * interfaces, but never both at the same time.
1029 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1030 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1032 debugfs_hw_add(local
);
1034 local
->hw
.conf
.beacon_int
= 1000;
1036 local
->wstats_flags
|= local
->hw
.max_rssi
?
1037 IW_QUAL_LEVEL_UPDATED
: IW_QUAL_LEVEL_INVALID
;
1038 local
->wstats_flags
|= local
->hw
.max_signal
?
1039 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1040 local
->wstats_flags
|= local
->hw
.max_noise
?
1041 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1042 if (local
->hw
.max_rssi
< 0 || local
->hw
.max_noise
< 0)
1043 local
->wstats_flags
|= IW_QUAL_DBM
;
1045 result
= sta_info_start(local
);
1050 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1054 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1055 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1057 result
= register_netdevice(local
->mdev
);
1061 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1062 ieee80211_if_set_type(local
->mdev
, IEEE80211_IF_TYPE_AP
);
1064 result
= ieee80211_init_rate_ctrl_alg(local
, NULL
);
1066 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1067 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1071 result
= ieee80211_wep_init(local
);
1074 printk(KERN_DEBUG
"%s: Failed to initialize wep\n",
1075 wiphy_name(local
->hw
.wiphy
));
1079 ieee80211_install_qdisc(local
->mdev
);
1081 /* add one default STA interface */
1082 result
= ieee80211_if_add(local
->mdev
, "wlan%d", NULL
,
1083 IEEE80211_IF_TYPE_STA
);
1085 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1086 wiphy_name(local
->hw
.wiphy
));
1088 local
->reg_state
= IEEE80211_DEV_REGISTERED
;
1091 ieee80211_led_init(local
);
1096 rate_control_deinitialize(local
);
1098 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1099 unregister_netdevice(local
->mdev
);
1102 sta_info_stop(local
);
1104 debugfs_hw_del(local
);
1105 destroy_workqueue(local
->hw
.workqueue
);
1107 wiphy_unregister(local
->hw
.wiphy
);
1110 EXPORT_SYMBOL(ieee80211_register_hw
);
1112 int ieee80211_register_hwmode(struct ieee80211_hw
*hw
,
1113 struct ieee80211_hw_mode
*mode
)
1115 struct ieee80211_local
*local
= hw_to_local(hw
);
1116 struct ieee80211_rate
*rate
;
1119 INIT_LIST_HEAD(&mode
->list
);
1120 list_add_tail(&mode
->list
, &local
->modes_list
);
1122 local
->hw_modes
|= (1 << mode
->mode
);
1123 for (i
= 0; i
< mode
->num_rates
; i
++) {
1124 rate
= &(mode
->rates
[i
]);
1125 rate
->rate_inv
= CHAN_UTIL_RATE_LCM
/ rate
->rate
;
1127 ieee80211_prepare_rates(local
, mode
);
1129 if (!local
->oper_hw_mode
) {
1130 /* Default to this mode */
1131 local
->hw
.conf
.phymode
= mode
->mode
;
1132 local
->oper_hw_mode
= local
->scan_hw_mode
= mode
;
1133 local
->oper_channel
= local
->scan_channel
= &mode
->channels
[0];
1134 local
->hw
.conf
.mode
= local
->oper_hw_mode
;
1135 local
->hw
.conf
.chan
= local
->oper_channel
;
1138 if (!(hw
->flags
& IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED
))
1139 ieee80211_set_default_regdomain(mode
);
1143 EXPORT_SYMBOL(ieee80211_register_hwmode
);
1145 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1147 struct ieee80211_local
*local
= hw_to_local(hw
);
1148 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1151 tasklet_kill(&local
->tx_pending_tasklet
);
1152 tasklet_kill(&local
->tasklet
);
1156 BUG_ON(local
->reg_state
!= IEEE80211_DEV_REGISTERED
);
1158 local
->reg_state
= IEEE80211_DEV_UNREGISTERED
;
1161 * At this point, interface list manipulations are fine
1162 * because the driver cannot be handing us frames any
1163 * more and the tasklet is killed.
1167 * First, we remove all non-master interfaces. Do this because they
1168 * may have bss pointer dependency on the master, and when we free
1169 * the master these would be freed as well, breaking our list
1170 * iteration completely.
1172 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1173 if (sdata
->dev
== local
->mdev
)
1175 list_del(&sdata
->list
);
1176 __ieee80211_if_del(local
, sdata
);
1179 /* then, finally, remove the master interface */
1180 __ieee80211_if_del(local
, IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1184 ieee80211_rx_bss_list_deinit(local
->mdev
);
1185 ieee80211_clear_tx_pending(local
);
1186 sta_info_stop(local
);
1187 rate_control_deinitialize(local
);
1188 debugfs_hw_del(local
);
1190 for (i
= 0; i
< NUM_IEEE80211_MODES
; i
++) {
1191 kfree(local
->supp_rates
[i
]);
1192 kfree(local
->basic_rates
[i
]);
1195 if (skb_queue_len(&local
->skb_queue
)
1196 || skb_queue_len(&local
->skb_queue_unreliable
))
1197 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1198 wiphy_name(local
->hw
.wiphy
));
1199 skb_queue_purge(&local
->skb_queue
);
1200 skb_queue_purge(&local
->skb_queue_unreliable
);
1202 destroy_workqueue(local
->hw
.workqueue
);
1203 wiphy_unregister(local
->hw
.wiphy
);
1204 ieee80211_wep_free(local
);
1205 ieee80211_led_exit(local
);
1207 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1209 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1211 struct ieee80211_local
*local
= hw_to_local(hw
);
1213 ieee80211_if_free(local
->mdev
);
1214 wiphy_free(local
->hw
.wiphy
);
1216 EXPORT_SYMBOL(ieee80211_free_hw
);
1218 static int __init
ieee80211_init(void)
1220 struct sk_buff
*skb
;
1223 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data
) > sizeof(skb
->cb
));
1225 ret
= ieee80211_wme_register();
1227 printk(KERN_DEBUG
"ieee80211_init: failed to "
1228 "initialize WME (err=%d)\n", ret
);
1232 ieee80211_debugfs_netdev_init();
1233 ieee80211_regdomain_init();
1238 static void __exit
ieee80211_exit(void)
1240 ieee80211_wme_unregister();
1241 ieee80211_debugfs_netdev_exit();
1245 subsys_initcall(ieee80211_init
);
1246 module_exit(ieee80211_exit
);
1248 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1249 MODULE_LICENSE("GPL");