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"
38 * For seeing transmitted packets on monitor interfaces
39 * we have a radiotap header too.
41 struct ieee80211_tx_status_rtap_hdr
{
42 struct ieee80211_radiotap_header hdr
;
45 } __attribute__ ((packed
));
47 /* common interface routines */
49 static int header_parse_80211(const struct sk_buff
*skb
, unsigned char *haddr
)
51 memcpy(haddr
, skb_mac_header(skb
) + 10, ETH_ALEN
); /* addr2 */
55 /* must be called under mdev tx lock */
56 static void ieee80211_configure_filter(struct ieee80211_local
*local
)
58 unsigned int changed_flags
;
59 unsigned int new_flags
= 0;
61 if (atomic_read(&local
->iff_promiscs
))
62 new_flags
|= FIF_PROMISC_IN_BSS
;
64 if (atomic_read(&local
->iff_allmultis
))
65 new_flags
|= FIF_ALLMULTI
;
68 new_flags
|= FIF_CONTROL
|
70 FIF_BCN_PRBRESP_PROMISC
;
72 changed_flags
= local
->filter_flags
^ new_flags
;
77 local
->ops
->configure_filter(local_to_hw(local
),
78 changed_flags
, &new_flags
,
79 local
->mdev
->mc_count
,
80 local
->mdev
->mc_list
);
82 WARN_ON(new_flags
& (1<<31));
84 local
->filter_flags
= new_flags
& ~(1<<31);
87 /* master interface */
89 static int ieee80211_master_open(struct net_device
*dev
)
91 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
92 struct ieee80211_sub_if_data
*sdata
;
93 int res
= -EOPNOTSUPP
;
95 /* we hold the RTNL here so can safely walk the list */
96 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
97 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
)) {
105 static int ieee80211_master_stop(struct net_device
*dev
)
107 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
108 struct ieee80211_sub_if_data
*sdata
;
110 /* we hold the RTNL here so can safely walk the list */
111 list_for_each_entry(sdata
, &local
->interfaces
, list
)
112 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
))
113 dev_close(sdata
->dev
);
118 static void ieee80211_master_set_multicast_list(struct net_device
*dev
)
120 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
122 ieee80211_configure_filter(local
);
125 /* regular interfaces */
127 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
129 /* FIX: what would be proper limits for MTU?
130 * This interface uses 802.3 frames. */
131 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6) {
132 printk(KERN_WARNING
"%s: invalid MTU %d\n",
137 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
138 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
139 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
144 static inline int identical_mac_addr_allowed(int type1
, int type2
)
146 return (type1
== IEEE80211_IF_TYPE_MNTR
||
147 type2
== IEEE80211_IF_TYPE_MNTR
||
148 (type1
== IEEE80211_IF_TYPE_AP
&&
149 type2
== IEEE80211_IF_TYPE_WDS
) ||
150 (type1
== IEEE80211_IF_TYPE_WDS
&&
151 (type2
== IEEE80211_IF_TYPE_WDS
||
152 type2
== IEEE80211_IF_TYPE_AP
)) ||
153 (type1
== IEEE80211_IF_TYPE_AP
&&
154 type2
== IEEE80211_IF_TYPE_VLAN
) ||
155 (type1
== IEEE80211_IF_TYPE_VLAN
&&
156 (type2
== IEEE80211_IF_TYPE_AP
||
157 type2
== IEEE80211_IF_TYPE_VLAN
)));
160 static int ieee80211_open(struct net_device
*dev
)
162 struct ieee80211_sub_if_data
*sdata
, *nsdata
;
163 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
164 struct ieee80211_if_init_conf conf
;
167 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
169 /* we hold the RTNL here so can safely walk the list */
170 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
171 struct net_device
*ndev
= nsdata
->dev
;
173 if (ndev
!= dev
&& ndev
!= local
->mdev
&& netif_running(ndev
) &&
174 compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
) == 0) {
176 * check whether it may have the same address
178 if (!identical_mac_addr_allowed(sdata
->type
,
183 * can only add VLANs to enabled APs
185 if (sdata
->type
== IEEE80211_IF_TYPE_VLAN
&&
186 nsdata
->type
== IEEE80211_IF_TYPE_AP
&&
187 netif_running(nsdata
->dev
))
188 sdata
->u
.vlan
.ap
= nsdata
;
192 switch (sdata
->type
) {
193 case IEEE80211_IF_TYPE_WDS
:
194 if (is_zero_ether_addr(sdata
->u
.wds
.remote_addr
))
197 case IEEE80211_IF_TYPE_VLAN
:
198 if (!sdata
->u
.vlan
.ap
)
201 case IEEE80211_IF_TYPE_AP
:
202 case IEEE80211_IF_TYPE_STA
:
203 case IEEE80211_IF_TYPE_MNTR
:
204 case IEEE80211_IF_TYPE_IBSS
:
205 /* no special treatment */
207 case IEEE80211_IF_TYPE_INVALID
:
213 if (local
->open_count
== 0) {
215 if (local
->ops
->start
)
216 res
= local
->ops
->start(local_to_hw(local
));
219 ieee80211_hw_config(local
);
222 switch (sdata
->type
) {
223 case IEEE80211_IF_TYPE_VLAN
:
224 list_add(&sdata
->u
.vlan
.list
, &sdata
->u
.vlan
.ap
->u
.ap
.vlans
);
225 /* no need to tell driver */
227 case IEEE80211_IF_TYPE_MNTR
:
228 /* must be before the call to ieee80211_configure_filter */
230 if (local
->monitors
== 1) {
231 netif_tx_lock_bh(local
->mdev
);
232 ieee80211_configure_filter(local
);
233 netif_tx_unlock_bh(local
->mdev
);
235 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
238 case IEEE80211_IF_TYPE_STA
:
239 case IEEE80211_IF_TYPE_IBSS
:
240 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
243 conf
.if_id
= dev
->ifindex
;
244 conf
.type
= sdata
->type
;
245 conf
.mac_addr
= dev
->dev_addr
;
246 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
247 if (res
&& !local
->open_count
&& local
->ops
->stop
)
248 local
->ops
->stop(local_to_hw(local
));
252 ieee80211_if_config(dev
);
253 ieee80211_reset_erp_info(dev
);
254 ieee80211_enable_keys(sdata
);
256 if (sdata
->type
== IEEE80211_IF_TYPE_STA
&&
257 !(sdata
->flags
& IEEE80211_SDATA_USERSPACE_MLME
))
258 netif_carrier_off(dev
);
260 netif_carrier_on(dev
);
263 if (local
->open_count
== 0) {
264 res
= dev_open(local
->mdev
);
266 tasklet_enable(&local
->tx_pending_tasklet
);
267 tasklet_enable(&local
->tasklet
);
271 * set_multicast_list will be invoked by the networking core
272 * which will check whether any increments here were done in
273 * error and sync them down to the hardware as filter flags.
275 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
276 atomic_inc(&local
->iff_allmultis
);
278 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
279 atomic_inc(&local
->iff_promiscs
);
283 netif_start_queue(dev
);
288 static int ieee80211_stop(struct net_device
*dev
)
290 struct ieee80211_sub_if_data
*sdata
;
291 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
292 struct ieee80211_if_init_conf conf
;
294 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
296 netif_stop_queue(dev
);
299 * Don't count this interface for promisc/allmulti while it
300 * is down. dev_mc_unsync() will invoke set_multicast_list
301 * on the master interface which will sync these down to the
302 * hardware as filter flags.
304 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
305 atomic_dec(&local
->iff_allmultis
);
307 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
308 atomic_dec(&local
->iff_promiscs
);
310 dev_mc_unsync(local
->mdev
, dev
);
312 /* down all dependent devices, that is VLANs */
313 if (sdata
->type
== IEEE80211_IF_TYPE_AP
) {
314 struct ieee80211_sub_if_data
*vlan
, *tmp
;
316 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
318 dev_close(vlan
->dev
);
319 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
324 switch (sdata
->type
) {
325 case IEEE80211_IF_TYPE_VLAN
:
326 list_del(&sdata
->u
.vlan
.list
);
327 sdata
->u
.vlan
.ap
= NULL
;
328 /* no need to tell driver */
330 case IEEE80211_IF_TYPE_MNTR
:
332 if (local
->monitors
== 0) {
333 netif_tx_lock_bh(local
->mdev
);
334 ieee80211_configure_filter(local
);
335 netif_tx_unlock_bh(local
->mdev
);
337 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
340 case IEEE80211_IF_TYPE_STA
:
341 case IEEE80211_IF_TYPE_IBSS
:
342 sdata
->u
.sta
.state
= IEEE80211_DISABLED
;
343 del_timer_sync(&sdata
->u
.sta
.timer
);
345 * When we get here, the interface is marked down.
346 * Call synchronize_rcu() to wait for the RX path
347 * should it be using the interface and enqueuing
348 * frames at this very time on another CPU.
351 skb_queue_purge(&sdata
->u
.sta
.skb_queue
);
353 if (!local
->ops
->hw_scan
&&
354 local
->scan_dev
== sdata
->dev
) {
355 local
->sta_scanning
= 0;
356 cancel_delayed_work(&local
->scan_work
);
358 flush_workqueue(local
->hw
.workqueue
);
360 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_PRIVACY_INVOKED
;
361 kfree(sdata
->u
.sta
.extra_ie
);
362 sdata
->u
.sta
.extra_ie
= NULL
;
363 sdata
->u
.sta
.extra_ie_len
= 0;
366 conf
.if_id
= dev
->ifindex
;
367 conf
.type
= sdata
->type
;
368 conf
.mac_addr
= dev
->dev_addr
;
369 /* disable all keys for as long as this netdev is down */
370 ieee80211_disable_keys(sdata
);
371 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
374 if (local
->open_count
== 0) {
375 if (netif_running(local
->mdev
))
376 dev_close(local
->mdev
);
378 if (local
->ops
->stop
)
379 local
->ops
->stop(local_to_hw(local
));
381 tasklet_disable(&local
->tx_pending_tasklet
);
382 tasklet_disable(&local
->tasklet
);
388 static void ieee80211_set_multicast_list(struct net_device
*dev
)
390 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
391 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
392 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
394 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
395 promisc
= !!(dev
->flags
& IFF_PROMISC
);
396 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
397 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
399 if (allmulti
!= sdata_allmulti
) {
400 if (dev
->flags
& IFF_ALLMULTI
)
401 atomic_inc(&local
->iff_allmultis
);
403 atomic_dec(&local
->iff_allmultis
);
404 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
407 if (promisc
!= sdata_promisc
) {
408 if (dev
->flags
& IFF_PROMISC
)
409 atomic_inc(&local
->iff_promiscs
);
411 atomic_dec(&local
->iff_promiscs
);
412 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
415 dev_mc_sync(local
->mdev
, dev
);
418 static const struct header_ops ieee80211_header_ops
= {
419 .create
= eth_header
,
420 .parse
= header_parse_80211
,
421 .rebuild
= eth_rebuild_header
,
422 .cache
= eth_header_cache
,
423 .cache_update
= eth_header_cache_update
,
426 /* Must not be called for mdev */
427 void ieee80211_if_setup(struct net_device
*dev
)
430 dev
->header_ops
= &ieee80211_header_ops
;
431 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
432 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
433 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
434 dev
->change_mtu
= ieee80211_change_mtu
;
435 dev
->open
= ieee80211_open
;
436 dev
->stop
= ieee80211_stop
;
437 dev
->destructor
= ieee80211_if_free
;
440 /* WDS specialties */
442 int ieee80211_if_update_wds(struct net_device
*dev
, u8
*remote_addr
)
444 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
445 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
446 struct sta_info
*sta
;
447 DECLARE_MAC_BUF(mac
);
449 if (compare_ether_addr(remote_addr
, sdata
->u
.wds
.remote_addr
) == 0)
452 /* Create STA entry for the new peer */
453 sta
= sta_info_add(local
, dev
, remote_addr
, GFP_KERNEL
);
458 /* Remove STA entry for the old peer */
459 sta
= sta_info_get(local
, sdata
->u
.wds
.remote_addr
);
464 printk(KERN_DEBUG
"%s: could not find STA entry for WDS link "
466 dev
->name
, print_mac(mac
, sdata
->u
.wds
.remote_addr
));
469 /* Update WDS link data */
470 memcpy(&sdata
->u
.wds
.remote_addr
, remote_addr
, ETH_ALEN
);
475 /* everything else */
477 static int __ieee80211_if_config(struct net_device
*dev
,
478 struct sk_buff
*beacon
,
479 struct ieee80211_tx_control
*control
)
481 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
482 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
483 struct ieee80211_if_conf conf
;
485 if (!local
->ops
->config_interface
|| !netif_running(dev
))
488 memset(&conf
, 0, sizeof(conf
));
489 conf
.type
= sdata
->type
;
490 if (sdata
->type
== IEEE80211_IF_TYPE_STA
||
491 sdata
->type
== IEEE80211_IF_TYPE_IBSS
) {
492 conf
.bssid
= sdata
->u
.sta
.bssid
;
493 conf
.ssid
= sdata
->u
.sta
.ssid
;
494 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
495 } else if (sdata
->type
== IEEE80211_IF_TYPE_AP
) {
496 conf
.ssid
= sdata
->u
.ap
.ssid
;
497 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
498 conf
.beacon
= beacon
;
499 conf
.beacon_control
= control
;
501 return local
->ops
->config_interface(local_to_hw(local
),
502 dev
->ifindex
, &conf
);
505 int ieee80211_if_config(struct net_device
*dev
)
507 return __ieee80211_if_config(dev
, NULL
, NULL
);
510 int ieee80211_if_config_beacon(struct net_device
*dev
)
512 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
513 struct ieee80211_tx_control control
;
516 if (!(local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
518 skb
= ieee80211_beacon_get(local_to_hw(local
), dev
->ifindex
, &control
);
521 return __ieee80211_if_config(dev
, skb
, &control
);
524 int ieee80211_hw_config(struct ieee80211_local
*local
)
526 struct ieee80211_hw_mode
*mode
;
527 struct ieee80211_channel
*chan
;
530 if (local
->sta_scanning
) {
531 chan
= local
->scan_channel
;
532 mode
= local
->scan_hw_mode
;
534 chan
= local
->oper_channel
;
535 mode
= local
->oper_hw_mode
;
538 local
->hw
.conf
.channel
= chan
->chan
;
539 local
->hw
.conf
.channel_val
= chan
->val
;
540 if (!local
->hw
.conf
.power_level
) {
541 local
->hw
.conf
.power_level
= chan
->power_level
;
543 local
->hw
.conf
.power_level
= min(chan
->power_level
,
544 local
->hw
.conf
.power_level
);
546 local
->hw
.conf
.freq
= chan
->freq
;
547 local
->hw
.conf
.phymode
= mode
->mode
;
548 local
->hw
.conf
.antenna_max
= chan
->antenna_max
;
549 local
->hw
.conf
.chan
= chan
;
550 local
->hw
.conf
.mode
= mode
;
552 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
553 printk(KERN_DEBUG
"HW CONFIG: channel=%d freq=%d "
554 "phymode=%d\n", local
->hw
.conf
.channel
, local
->hw
.conf
.freq
,
555 local
->hw
.conf
.phymode
);
556 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
558 if (local
->open_count
)
559 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
564 void ieee80211_erp_info_change_notify(struct net_device
*dev
, u8 changes
)
566 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
567 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
568 if (local
->ops
->erp_ie_changed
)
569 local
->ops
->erp_ie_changed(local_to_hw(local
), changes
,
570 !!(sdata
->flags
& IEEE80211_SDATA_USE_PROTECTION
),
571 !(sdata
->flags
& IEEE80211_SDATA_SHORT_PREAMBLE
));
574 void ieee80211_reset_erp_info(struct net_device
*dev
)
576 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
578 sdata
->flags
&= ~(IEEE80211_SDATA_USE_PROTECTION
|
579 IEEE80211_SDATA_SHORT_PREAMBLE
);
580 ieee80211_erp_info_change_notify(dev
,
581 IEEE80211_ERP_CHANGE_PROTECTION
|
582 IEEE80211_ERP_CHANGE_PREAMBLE
);
585 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
587 struct ieee80211_tx_status
*status
)
589 struct ieee80211_local
*local
= hw_to_local(hw
);
590 struct ieee80211_tx_status
*saved
;
593 skb
->dev
= local
->mdev
;
594 saved
= kmalloc(sizeof(struct ieee80211_tx_status
), GFP_ATOMIC
);
595 if (unlikely(!saved
)) {
597 printk(KERN_WARNING
"%s: Not enough memory, "
598 "dropping tx status", skb
->dev
->name
);
599 /* should be dev_kfree_skb_irq, but due to this function being
600 * named _irqsafe instead of just _irq we can't be sure that
601 * people won't call it from non-irq contexts */
602 dev_kfree_skb_any(skb
);
605 memcpy(saved
, status
, sizeof(struct ieee80211_tx_status
));
606 /* copy pointer to saved status into skb->cb for use by tasklet */
607 memcpy(skb
->cb
, &saved
, sizeof(saved
));
609 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
610 skb_queue_tail(status
->control
.flags
& IEEE80211_TXCTL_REQ_TX_STATUS
?
611 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
612 tmp
= skb_queue_len(&local
->skb_queue
) +
613 skb_queue_len(&local
->skb_queue_unreliable
);
614 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
615 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
616 memcpy(&saved
, skb
->cb
, sizeof(saved
));
618 dev_kfree_skb_irq(skb
);
620 I802_DEBUG_INC(local
->tx_status_drop
);
622 tasklet_schedule(&local
->tasklet
);
624 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
626 static void ieee80211_tasklet_handler(unsigned long data
)
628 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
630 struct ieee80211_rx_status rx_status
;
631 struct ieee80211_tx_status
*tx_status
;
633 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
634 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
635 switch (skb
->pkt_type
) {
636 case IEEE80211_RX_MSG
:
637 /* status is in skb->cb */
638 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
639 /* Clear skb->type in order to not confuse kernel
642 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
644 case IEEE80211_TX_STATUS_MSG
:
645 /* get pointer to saved status out of skb->cb */
646 memcpy(&tx_status
, skb
->cb
, sizeof(tx_status
));
648 ieee80211_tx_status(local_to_hw(local
),
652 default: /* should never get here! */
653 printk(KERN_ERR
"%s: Unknown message type (%d)\n",
654 wiphy_name(local
->hw
.wiphy
), skb
->pkt_type
);
661 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
662 * make a prepared TX frame (one that has been given to hw) to look like brand
663 * new IEEE 802.11 frame that is ready to go through TX processing again.
664 * Also, tx_packet_data in cb is restored from tx_control. */
665 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
666 struct ieee80211_key
*key
,
668 struct ieee80211_tx_control
*control
)
670 int hdrlen
, iv_len
, mic_len
;
671 struct ieee80211_tx_packet_data
*pkt_data
;
673 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
674 pkt_data
->ifindex
= control
->ifindex
;
676 if (control
->flags
& IEEE80211_TXCTL_REQ_TX_STATUS
)
677 pkt_data
->flags
|= IEEE80211_TXPD_REQ_TX_STATUS
;
678 if (control
->flags
& IEEE80211_TXCTL_DO_NOT_ENCRYPT
)
679 pkt_data
->flags
|= IEEE80211_TXPD_DO_NOT_ENCRYPT
;
680 if (control
->flags
& IEEE80211_TXCTL_REQUEUE
)
681 pkt_data
->flags
|= IEEE80211_TXPD_REQUEUE
;
682 pkt_data
->queue
= control
->queue
;
684 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
689 switch (key
->conf
.alg
) {
692 mic_len
= WEP_ICV_LEN
;
695 iv_len
= TKIP_IV_LEN
;
696 mic_len
= TKIP_ICV_LEN
;
699 iv_len
= CCMP_HDR_LEN
;
700 mic_len
= CCMP_MIC_LEN
;
706 if (skb
->len
>= mic_len
&&
707 !(key
->flags
& KEY_FLAG_UPLOADED_TO_HARDWARE
))
708 skb_trim(skb
, skb
->len
- mic_len
);
709 if (skb
->len
>= iv_len
&& skb
->len
> hdrlen
) {
710 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
711 skb_pull(skb
, iv_len
);
716 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
717 u16 fc
= le16_to_cpu(hdr
->frame_control
);
718 if ((fc
& 0x8C) == 0x88) /* QoS Control Field */ {
719 fc
&= ~IEEE80211_STYPE_QOS_DATA
;
720 hdr
->frame_control
= cpu_to_le16(fc
);
721 memmove(skb
->data
+ 2, skb
->data
, hdrlen
- 2);
727 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
728 struct ieee80211_tx_status
*status
)
730 struct sk_buff
*skb2
;
731 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
732 struct ieee80211_local
*local
= hw_to_local(hw
);
734 struct ieee80211_tx_status_rtap_hdr
*rthdr
;
735 struct ieee80211_sub_if_data
*sdata
;
740 "%s: ieee80211_tx_status called with NULL status\n",
741 wiphy_name(local
->hw
.wiphy
));
746 if (status
->excessive_retries
) {
747 struct sta_info
*sta
;
748 sta
= sta_info_get(local
, hdr
->addr1
);
750 if (sta
->flags
& WLAN_STA_PS
) {
751 /* The STA is in power save mode, so assume
752 * that this TX packet failed because of that.
754 status
->excessive_retries
= 0;
755 status
->flags
|= IEEE80211_TX_STATUS_TX_FILTERED
;
761 if (status
->flags
& IEEE80211_TX_STATUS_TX_FILTERED
) {
762 struct sta_info
*sta
;
763 sta
= sta_info_get(local
, hdr
->addr1
);
765 sta
->tx_filtered_count
++;
767 /* Clear the TX filter mask for this STA when sending
768 * the next packet. If the STA went to power save mode,
769 * this will happen when it is waking up for the next
771 sta
->clear_dst_mask
= 1;
773 /* TODO: Is the WLAN_STA_PS flag always set here or is
774 * the race between RX and TX status causing some
775 * packets to be filtered out before 80211.o gets an
776 * update for PS status? This seems to be the case, so
777 * no changes are likely to be needed. */
778 if (sta
->flags
& WLAN_STA_PS
&&
779 skb_queue_len(&sta
->tx_filtered
) <
781 ieee80211_remove_tx_extra(local
, sta
->key
,
784 skb_queue_tail(&sta
->tx_filtered
, skb
);
785 } else if (!(sta
->flags
& WLAN_STA_PS
) &&
786 !(status
->control
.flags
& IEEE80211_TXCTL_REQUEUE
)) {
787 /* Software retry the packet once */
788 status
->control
.flags
|= IEEE80211_TXCTL_REQUEUE
;
789 ieee80211_remove_tx_extra(local
, sta
->key
,
794 if (net_ratelimit()) {
795 printk(KERN_DEBUG
"%s: dropped TX "
796 "filtered frame queue_len=%d "
798 wiphy_name(local
->hw
.wiphy
),
801 !!(sta
->flags
& WLAN_STA_PS
),
810 /* FIXME: STUPID to call this with both local and local->mdev */
811 rate_control_tx_status(local
, local
->mdev
, skb
, status
);
814 ieee80211_led_tx(local
, 0);
817 * Fragments are passed to low-level drivers as separate skbs, so these
818 * are actually fragments, not frames. Update frame counters only for
819 * the first fragment of the frame. */
821 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
822 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
824 if (status
->flags
& IEEE80211_TX_STATUS_ACK
) {
826 local
->dot11TransmittedFrameCount
++;
827 if (is_multicast_ether_addr(hdr
->addr1
))
828 local
->dot11MulticastTransmittedFrameCount
++;
829 if (status
->retry_count
> 0)
830 local
->dot11RetryCount
++;
831 if (status
->retry_count
> 1)
832 local
->dot11MultipleRetryCount
++;
835 /* This counter shall be incremented for an acknowledged MPDU
836 * with an individual address in the address 1 field or an MPDU
837 * with a multicast address in the address 1 field of type Data
839 if (!is_multicast_ether_addr(hdr
->addr1
) ||
840 type
== IEEE80211_FTYPE_DATA
||
841 type
== IEEE80211_FTYPE_MGMT
)
842 local
->dot11TransmittedFragmentCount
++;
845 local
->dot11FailedCount
++;
848 /* this was a transmitted frame, but now we want to reuse it */
851 if (!local
->monitors
) {
856 /* send frame to monitor interfaces now */
858 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
859 printk(KERN_ERR
"ieee80211_tx_status: headroom too small\n");
864 rthdr
= (struct ieee80211_tx_status_rtap_hdr
*)
865 skb_push(skb
, sizeof(*rthdr
));
867 memset(rthdr
, 0, sizeof(*rthdr
));
868 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
869 rthdr
->hdr
.it_present
=
870 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS
) |
871 (1 << IEEE80211_RADIOTAP_DATA_RETRIES
));
873 if (!(status
->flags
& IEEE80211_TX_STATUS_ACK
) &&
874 !is_multicast_ether_addr(hdr
->addr1
))
875 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL
);
877 if ((status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) &&
878 (status
->control
.flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
))
879 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS
);
880 else if (status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
)
881 rthdr
->tx_flags
|= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS
);
883 rthdr
->data_retries
= status
->retry_count
;
886 monitors
= local
->monitors
;
887 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
889 * Using the monitors counter is possibly racy, but
890 * if the value is wrong we simply either clone the skb
891 * once too much or forget sending it to one monitor iface
892 * The latter case isn't nice but fixing the race is much
895 if (!monitors
|| !skb
)
898 if (sdata
->type
== IEEE80211_IF_TYPE_MNTR
) {
899 if (!netif_running(sdata
->dev
))
903 skb2
= skb_clone(skb
, GFP_ATOMIC
);
906 skb
->dev
= sdata
->dev
;
907 /* XXX: is this sufficient for BPF? */
908 skb_set_mac_header(skb
, 0);
909 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
910 skb
->pkt_type
= PACKET_OTHERHOST
;
911 skb
->protocol
= htons(ETH_P_802_2
);
912 memset(skb
->cb
, 0, sizeof(skb
->cb
));
922 EXPORT_SYMBOL(ieee80211_tx_status
);
924 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
925 const struct ieee80211_ops
*ops
)
927 struct net_device
*mdev
;
928 struct ieee80211_local
*local
;
929 struct ieee80211_sub_if_data
*sdata
;
933 /* Ensure 32-byte alignment of our private data and hw private data.
934 * We use the wiphy priv data for both our ieee80211_local and for
935 * the driver's private data
937 * In memory it'll be like this:
939 * +-------------------------+
941 * +-------------------------+
942 * | struct ieee80211_local |
943 * +-------------------------+
944 * | driver's private data |
945 * +-------------------------+
948 priv_size
= ((sizeof(struct ieee80211_local
) +
949 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
952 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
957 wiphy
->privid
= mac80211_wiphy_privid
;
959 local
= wiphy_priv(wiphy
);
960 local
->hw
.wiphy
= wiphy
;
962 local
->hw
.priv
= (char *)local
+
963 ((sizeof(struct ieee80211_local
) +
964 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
969 BUG_ON(!ops
->config
);
970 BUG_ON(!ops
->add_interface
);
971 BUG_ON(!ops
->remove_interface
);
972 BUG_ON(!ops
->configure_filter
);
975 /* for now, mdev needs sub_if_data :/ */
976 mdev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
),
977 "wmaster%d", ether_setup
);
983 sdata
= IEEE80211_DEV_TO_SUB_IF(mdev
);
984 mdev
->ieee80211_ptr
= &sdata
->wdev
;
985 sdata
->wdev
.wiphy
= wiphy
;
987 local
->hw
.queues
= 1; /* default */
990 local
->rx_pre_handlers
= ieee80211_rx_pre_handlers
;
991 local
->rx_handlers
= ieee80211_rx_handlers
;
992 local
->tx_handlers
= ieee80211_tx_handlers
;
994 local
->bridge_packets
= 1;
996 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
997 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
998 local
->short_retry_limit
= 7;
999 local
->long_retry_limit
= 4;
1000 local
->hw
.conf
.radio_enabled
= 1;
1002 local
->enabled_modes
= ~0;
1004 INIT_LIST_HEAD(&local
->modes_list
);
1006 INIT_LIST_HEAD(&local
->interfaces
);
1008 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
1009 ieee80211_rx_bss_list_init(mdev
);
1011 sta_info_init(local
);
1013 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
1014 mdev
->open
= ieee80211_master_open
;
1015 mdev
->stop
= ieee80211_master_stop
;
1016 mdev
->type
= ARPHRD_IEEE80211
;
1017 mdev
->header_ops
= &ieee80211_header_ops
;
1018 mdev
->set_multicast_list
= ieee80211_master_set_multicast_list
;
1020 sdata
->type
= IEEE80211_IF_TYPE_AP
;
1022 sdata
->local
= local
;
1023 sdata
->u
.ap
.force_unicast_rateidx
= -1;
1024 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
1025 ieee80211_if_sdata_init(sdata
);
1026 /* no RCU needed since we're still during init phase */
1027 list_add_tail(&sdata
->list
, &local
->interfaces
);
1029 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
1030 (unsigned long)local
);
1031 tasklet_disable(&local
->tx_pending_tasklet
);
1033 tasklet_init(&local
->tasklet
,
1034 ieee80211_tasklet_handler
,
1035 (unsigned long) local
);
1036 tasklet_disable(&local
->tasklet
);
1038 skb_queue_head_init(&local
->skb_queue
);
1039 skb_queue_head_init(&local
->skb_queue_unreliable
);
1041 return local_to_hw(local
);
1043 EXPORT_SYMBOL(ieee80211_alloc_hw
);
1045 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
1047 struct ieee80211_local
*local
= hw_to_local(hw
);
1051 result
= wiphy_register(local
->hw
.wiphy
);
1055 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
1056 local
->hw
.workqueue
= create_singlethread_workqueue(name
);
1057 if (!local
->hw
.workqueue
) {
1059 goto fail_workqueue
;
1063 * The hardware needs headroom for sending the frame,
1064 * and we need some headroom for passing the frame to monitor
1065 * interfaces, but never both at the same time.
1067 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
1068 sizeof(struct ieee80211_tx_status_rtap_hdr
));
1070 debugfs_hw_add(local
);
1072 local
->hw
.conf
.beacon_int
= 1000;
1074 local
->wstats_flags
|= local
->hw
.max_rssi
?
1075 IW_QUAL_LEVEL_UPDATED
: IW_QUAL_LEVEL_INVALID
;
1076 local
->wstats_flags
|= local
->hw
.max_signal
?
1077 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
1078 local
->wstats_flags
|= local
->hw
.max_noise
?
1079 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
1080 if (local
->hw
.max_rssi
< 0 || local
->hw
.max_noise
< 0)
1081 local
->wstats_flags
|= IW_QUAL_DBM
;
1083 result
= sta_info_start(local
);
1088 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
1092 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1093 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
1095 result
= register_netdevice(local
->mdev
);
1099 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1100 ieee80211_if_set_type(local
->mdev
, IEEE80211_IF_TYPE_AP
);
1102 result
= ieee80211_init_rate_ctrl_alg(local
,
1103 hw
->rate_control_algorithm
);
1105 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
1106 "algorithm\n", wiphy_name(local
->hw
.wiphy
));
1110 result
= ieee80211_wep_init(local
);
1113 printk(KERN_DEBUG
"%s: Failed to initialize wep\n",
1114 wiphy_name(local
->hw
.wiphy
));
1118 ieee80211_install_qdisc(local
->mdev
);
1120 /* add one default STA interface */
1121 result
= ieee80211_if_add(local
->mdev
, "wlan%d", NULL
,
1122 IEEE80211_IF_TYPE_STA
);
1124 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
1125 wiphy_name(local
->hw
.wiphy
));
1127 local
->reg_state
= IEEE80211_DEV_REGISTERED
;
1130 ieee80211_led_init(local
);
1135 rate_control_deinitialize(local
);
1137 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1138 unregister_netdevice(local
->mdev
);
1141 sta_info_stop(local
);
1143 debugfs_hw_del(local
);
1144 destroy_workqueue(local
->hw
.workqueue
);
1146 wiphy_unregister(local
->hw
.wiphy
);
1149 EXPORT_SYMBOL(ieee80211_register_hw
);
1151 int ieee80211_register_hwmode(struct ieee80211_hw
*hw
,
1152 struct ieee80211_hw_mode
*mode
)
1154 struct ieee80211_local
*local
= hw_to_local(hw
);
1155 struct ieee80211_rate
*rate
;
1158 INIT_LIST_HEAD(&mode
->list
);
1159 list_add_tail(&mode
->list
, &local
->modes_list
);
1161 local
->hw_modes
|= (1 << mode
->mode
);
1162 for (i
= 0; i
< mode
->num_rates
; i
++) {
1163 rate
= &(mode
->rates
[i
]);
1164 rate
->rate_inv
= CHAN_UTIL_RATE_LCM
/ rate
->rate
;
1166 ieee80211_prepare_rates(local
, mode
);
1168 if (!local
->oper_hw_mode
) {
1169 /* Default to this mode */
1170 local
->hw
.conf
.phymode
= mode
->mode
;
1171 local
->oper_hw_mode
= local
->scan_hw_mode
= mode
;
1172 local
->oper_channel
= local
->scan_channel
= &mode
->channels
[0];
1173 local
->hw
.conf
.mode
= local
->oper_hw_mode
;
1174 local
->hw
.conf
.chan
= local
->oper_channel
;
1177 if (!(hw
->flags
& IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED
))
1178 ieee80211_set_default_regdomain(mode
);
1182 EXPORT_SYMBOL(ieee80211_register_hwmode
);
1184 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
1186 struct ieee80211_local
*local
= hw_to_local(hw
);
1187 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1190 tasklet_kill(&local
->tx_pending_tasklet
);
1191 tasklet_kill(&local
->tasklet
);
1195 BUG_ON(local
->reg_state
!= IEEE80211_DEV_REGISTERED
);
1197 local
->reg_state
= IEEE80211_DEV_UNREGISTERED
;
1200 * At this point, interface list manipulations are fine
1201 * because the driver cannot be handing us frames any
1202 * more and the tasklet is killed.
1206 * First, we remove all non-master interfaces. Do this because they
1207 * may have bss pointer dependency on the master, and when we free
1208 * the master these would be freed as well, breaking our list
1209 * iteration completely.
1211 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1212 if (sdata
->dev
== local
->mdev
)
1214 list_del(&sdata
->list
);
1215 __ieee80211_if_del(local
, sdata
);
1218 /* then, finally, remove the master interface */
1219 __ieee80211_if_del(local
, IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
1223 ieee80211_rx_bss_list_deinit(local
->mdev
);
1224 ieee80211_clear_tx_pending(local
);
1225 sta_info_stop(local
);
1226 rate_control_deinitialize(local
);
1227 debugfs_hw_del(local
);
1229 for (i
= 0; i
< NUM_IEEE80211_MODES
; i
++) {
1230 kfree(local
->supp_rates
[i
]);
1231 kfree(local
->basic_rates
[i
]);
1234 if (skb_queue_len(&local
->skb_queue
)
1235 || skb_queue_len(&local
->skb_queue_unreliable
))
1236 printk(KERN_WARNING
"%s: skb_queue not empty\n",
1237 wiphy_name(local
->hw
.wiphy
));
1238 skb_queue_purge(&local
->skb_queue
);
1239 skb_queue_purge(&local
->skb_queue_unreliable
);
1241 destroy_workqueue(local
->hw
.workqueue
);
1242 wiphy_unregister(local
->hw
.wiphy
);
1243 ieee80211_wep_free(local
);
1244 ieee80211_led_exit(local
);
1246 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1248 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1250 struct ieee80211_local
*local
= hw_to_local(hw
);
1252 ieee80211_if_free(local
->mdev
);
1253 wiphy_free(local
->hw
.wiphy
);
1255 EXPORT_SYMBOL(ieee80211_free_hw
);
1257 static int __init
ieee80211_init(void)
1259 struct sk_buff
*skb
;
1262 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data
) > sizeof(skb
->cb
));
1264 #ifdef CONFIG_MAC80211_RCSIMPLE
1265 ret
= ieee80211_rate_control_register(&mac80211_rcsimple
);
1270 ret
= ieee80211_wme_register();
1272 #ifdef CONFIG_MAC80211_RCSIMPLE
1273 ieee80211_rate_control_unregister(&mac80211_rcsimple
);
1275 printk(KERN_DEBUG
"ieee80211_init: failed to "
1276 "initialize WME (err=%d)\n", ret
);
1280 ieee80211_debugfs_netdev_init();
1281 ieee80211_regdomain_init();
1286 static void __exit
ieee80211_exit(void)
1288 #ifdef CONFIG_MAC80211_RCSIMPLE
1289 ieee80211_rate_control_unregister(&mac80211_rcsimple
);
1292 ieee80211_wme_unregister();
1293 ieee80211_debugfs_netdev_exit();
1297 subsys_initcall(ieee80211_init
);
1298 module_exit(ieee80211_exit
);
1300 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1301 MODULE_LICENSE("GPL");