2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
27 #include "ieee80211_i.h"
36 #include "debugfs_netdev.h"
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
46 } __attribute__ ((packed));
48 /* common interface routines */
50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
56 /* must be called under mdev tx lock */
57 static void ieee80211_configure_filter(struct ieee80211_local *local)
59 unsigned int changed_flags;
60 unsigned int new_flags = 0;
62 if (atomic_read(&local->iff_promiscs))
63 new_flags |= FIF_PROMISC_IN_BSS;
65 if (atomic_read(&local->iff_allmultis))
66 new_flags |= FIF_ALLMULTI;
69 new_flags |= FIF_BCN_PRBRESP_PROMISC;
71 if (local->fif_fcsfail)
72 new_flags |= FIF_FCSFAIL;
74 if (local->fif_plcpfail)
75 new_flags |= FIF_PLCPFAIL;
77 if (local->fif_control)
78 new_flags |= FIF_CONTROL;
80 if (local->fif_other_bss)
81 new_flags |= FIF_OTHER_BSS;
83 changed_flags = local->filter_flags ^ new_flags;
88 local->ops->configure_filter(local_to_hw(local),
89 changed_flags, &new_flags,
90 local->mdev->mc_count,
91 local->mdev->mc_list);
93 WARN_ON(new_flags & (1<<31));
95 local->filter_flags = new_flags & ~(1<<31);
98 /* master interface */
100 static int ieee80211_master_open(struct net_device *dev)
102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
103 struct ieee80211_sub_if_data *sdata;
104 int res = -EOPNOTSUPP;
106 /* we hold the RTNL here so can safely walk the list */
107 list_for_each_entry(sdata, &local->interfaces, list) {
108 if (sdata->dev != dev && netif_running(sdata->dev)) {
117 netif_start_queue(local->mdev);
122 static int ieee80211_master_stop(struct net_device *dev)
124 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
125 struct ieee80211_sub_if_data *sdata;
127 /* we hold the RTNL here so can safely walk the list */
128 list_for_each_entry(sdata, &local->interfaces, list)
129 if (sdata->dev != dev && netif_running(sdata->dev))
130 dev_close(sdata->dev);
135 static void ieee80211_master_set_multicast_list(struct net_device *dev)
137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
139 ieee80211_configure_filter(local);
142 /* regular interfaces */
144 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
149 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
158 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
159 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
160 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
165 static inline int identical_mac_addr_allowed(int type1, int type2)
167 return (type1 == IEEE80211_IF_TYPE_MNTR ||
168 type2 == IEEE80211_IF_TYPE_MNTR ||
169 (type1 == IEEE80211_IF_TYPE_AP &&
170 type2 == IEEE80211_IF_TYPE_WDS) ||
171 (type1 == IEEE80211_IF_TYPE_WDS &&
172 (type2 == IEEE80211_IF_TYPE_WDS ||
173 type2 == IEEE80211_IF_TYPE_AP)) ||
174 (type1 == IEEE80211_IF_TYPE_AP &&
175 type2 == IEEE80211_IF_TYPE_VLAN) ||
176 (type1 == IEEE80211_IF_TYPE_VLAN &&
177 (type2 == IEEE80211_IF_TYPE_AP ||
178 type2 == IEEE80211_IF_TYPE_VLAN)));
181 static int ieee80211_open(struct net_device *dev)
183 struct ieee80211_sub_if_data *sdata, *nsdata;
184 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
185 struct ieee80211_if_init_conf conf;
187 bool need_hw_reconfig = 0;
188 struct sta_info *sta;
190 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
192 /* we hold the RTNL here so can safely walk the list */
193 list_for_each_entry(nsdata, &local->interfaces, list) {
194 struct net_device *ndev = nsdata->dev;
196 if (ndev != dev && ndev != local->mdev && netif_running(ndev)) {
198 * Allow only a single IBSS interface to be up at any
199 * time. This is restricted because beacon distribution
200 * cannot work properly if both are in the same IBSS.
202 * To remove this restriction we'd have to disallow them
203 * from setting the same SSID on different IBSS interfaces
204 * belonging to the same hardware. Then, however, we're
205 * faced with having to adopt two different TSF timers...
207 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
208 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
212 * Disallow multiple IBSS/STA mode interfaces.
214 * This is a technical restriction, it is possible although
215 * most likely not IEEE 802.11 compliant to have multiple
216 * STAs with just a single hardware (the TSF timer will not
217 * be adjusted properly.)
219 * However, because mac80211 uses the master device's BSS
220 * information for each STA/IBSS interface, doing this will
221 * currently corrupt that BSS information completely, unless,
222 * a not very useful case, both STAs are associated to the
225 * To remove this restriction, the BSS information needs to
226 * be embedded in the STA/IBSS mode sdata instead of using
227 * the master device's BSS structure.
229 if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
230 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
231 (nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
232 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
236 * The remaining checks are only performed for interfaces
237 * with the same MAC address.
239 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
243 * check whether it may have the same address
245 if (!identical_mac_addr_allowed(sdata->vif.type,
250 * can only add VLANs to enabled APs
252 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
253 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
254 sdata->u.vlan.ap = nsdata;
258 switch (sdata->vif.type) {
259 case IEEE80211_IF_TYPE_WDS:
260 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
263 case IEEE80211_IF_TYPE_VLAN:
264 if (!sdata->u.vlan.ap)
267 case IEEE80211_IF_TYPE_AP:
268 case IEEE80211_IF_TYPE_STA:
269 case IEEE80211_IF_TYPE_MNTR:
270 case IEEE80211_IF_TYPE_IBSS:
271 case IEEE80211_IF_TYPE_MESH_POINT:
272 /* no special treatment */
274 case IEEE80211_IF_TYPE_INVALID:
280 if (local->open_count == 0) {
282 if (local->ops->start)
283 res = local->ops->start(local_to_hw(local));
286 need_hw_reconfig = 1;
287 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
290 switch (sdata->vif.type) {
291 case IEEE80211_IF_TYPE_VLAN:
292 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
293 /* no need to tell driver */
295 case IEEE80211_IF_TYPE_MNTR:
296 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
297 local->cooked_mntrs++;
301 /* must be before the call to ieee80211_configure_filter */
303 if (local->monitors == 1)
304 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
306 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
307 local->fif_fcsfail++;
308 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
309 local->fif_plcpfail++;
310 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
311 local->fif_control++;
312 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
313 local->fif_other_bss++;
315 netif_tx_lock_bh(local->mdev);
316 ieee80211_configure_filter(local);
317 netif_tx_unlock_bh(local->mdev);
319 case IEEE80211_IF_TYPE_STA:
320 case IEEE80211_IF_TYPE_IBSS:
321 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
324 conf.vif = &sdata->vif;
325 conf.type = sdata->vif.type;
326 conf.mac_addr = dev->dev_addr;
327 res = local->ops->add_interface(local_to_hw(local), &conf);
331 ieee80211_if_config(dev);
332 ieee80211_reset_erp_info(dev);
333 ieee80211_enable_keys(sdata);
335 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
336 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
337 netif_carrier_off(dev);
339 netif_carrier_on(dev);
342 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
343 /* Create STA entry for the WDS peer */
344 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
348 goto err_del_interface;
351 /* no locking required since STA is not live yet */
352 sta->flags |= WLAN_STA_AUTHORIZED;
354 res = sta_info_insert(sta);
356 /* STA has been freed */
357 goto err_del_interface;
361 if (local->open_count == 0) {
362 res = dev_open(local->mdev);
365 goto err_del_interface;
366 tasklet_enable(&local->tx_pending_tasklet);
367 tasklet_enable(&local->tasklet);
371 * set_multicast_list will be invoked by the networking core
372 * which will check whether any increments here were done in
373 * error and sync them down to the hardware as filter flags.
375 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
376 atomic_inc(&local->iff_allmultis);
378 if (sdata->flags & IEEE80211_SDATA_PROMISC)
379 atomic_inc(&local->iff_promiscs);
382 if (need_hw_reconfig)
383 ieee80211_hw_config(local);
386 * ieee80211_sta_work is disabled while network interface
387 * is down. Therefore, some configuration changes may not
388 * yet be effective. Trigger execution of ieee80211_sta_work
391 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
392 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
393 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
394 queue_work(local->hw.workqueue, &ifsta->work);
397 netif_start_queue(dev);
401 local->ops->remove_interface(local_to_hw(local), &conf);
403 if (!local->open_count && local->ops->stop)
404 local->ops->stop(local_to_hw(local));
408 static int ieee80211_stop(struct net_device *dev)
410 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
411 struct ieee80211_local *local = sdata->local;
412 struct ieee80211_if_init_conf conf;
413 struct sta_info *sta;
416 * Stop TX on this interface first.
418 netif_stop_queue(dev);
421 * Now delete all active aggregation sessions.
425 list_for_each_entry_rcu(sta, &local->sta_list, list) {
426 if (sta->sdata == sdata)
427 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
433 * Remove all stations associated with this interface.
435 * This must be done before calling ops->remove_interface()
436 * because otherwise we can later invoke ops->sta_notify()
437 * whenever the STAs are removed, and that invalidates driver
438 * assumptions about always getting a vif pointer that is valid
439 * (because if we remove a STA after ops->remove_interface()
440 * the driver will have removed the vif info already!)
442 * We could relax this and only unlink the stations from the
443 * hash table and list but keep them on a per-sdata list that
444 * will be inserted back again when the interface is brought
445 * up again, but I don't currently see a use case for that,
446 * except with WDS which gets a STA entry created when it is
449 sta_info_flush(local, sdata);
452 * Don't count this interface for promisc/allmulti while it
453 * is down. dev_mc_unsync() will invoke set_multicast_list
454 * on the master interface which will sync these down to the
455 * hardware as filter flags.
457 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
458 atomic_dec(&local->iff_allmultis);
460 if (sdata->flags & IEEE80211_SDATA_PROMISC)
461 atomic_dec(&local->iff_promiscs);
463 dev_mc_unsync(local->mdev, dev);
465 /* APs need special treatment */
466 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
467 struct ieee80211_sub_if_data *vlan, *tmp;
468 struct beacon_data *old_beacon = sdata->u.ap.beacon;
471 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
475 /* down all dependent devices, that is VLANs */
476 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
478 dev_close(vlan->dev);
479 WARN_ON(!list_empty(&sdata->u.ap.vlans));
484 switch (sdata->vif.type) {
485 case IEEE80211_IF_TYPE_VLAN:
486 list_del(&sdata->u.vlan.list);
487 sdata->u.vlan.ap = NULL;
488 /* no need to tell driver */
490 case IEEE80211_IF_TYPE_MNTR:
491 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
492 local->cooked_mntrs--;
497 if (local->monitors == 0)
498 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
500 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
501 local->fif_fcsfail--;
502 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
503 local->fif_plcpfail--;
504 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
505 local->fif_control--;
506 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
507 local->fif_other_bss--;
509 netif_tx_lock_bh(local->mdev);
510 ieee80211_configure_filter(local);
511 netif_tx_unlock_bh(local->mdev);
513 case IEEE80211_IF_TYPE_MESH_POINT:
514 case IEEE80211_IF_TYPE_STA:
515 case IEEE80211_IF_TYPE_IBSS:
516 sdata->u.sta.state = IEEE80211_DISABLED;
517 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
518 del_timer_sync(&sdata->u.sta.timer);
520 * When we get here, the interface is marked down.
521 * Call synchronize_rcu() to wait for the RX path
522 * should it be using the interface and enqueuing
523 * frames at this very time on another CPU.
526 skb_queue_purge(&sdata->u.sta.skb_queue);
528 if (local->scan_dev == sdata->dev) {
529 if (!local->ops->hw_scan) {
530 local->sta_sw_scanning = 0;
531 cancel_delayed_work(&local->scan_work);
533 local->sta_hw_scanning = 0;
536 flush_workqueue(local->hw.workqueue);
538 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
539 kfree(sdata->u.sta.extra_ie);
540 sdata->u.sta.extra_ie = NULL;
541 sdata->u.sta.extra_ie_len = 0;
544 conf.vif = &sdata->vif;
545 conf.type = sdata->vif.type;
546 conf.mac_addr = dev->dev_addr;
547 /* disable all keys for as long as this netdev is down */
548 ieee80211_disable_keys(sdata);
549 local->ops->remove_interface(local_to_hw(local), &conf);
552 if (local->open_count == 0) {
553 if (netif_running(local->mdev))
554 dev_close(local->mdev);
556 if (local->ops->stop)
557 local->ops->stop(local_to_hw(local));
559 ieee80211_led_radio(local, 0);
561 tasklet_disable(&local->tx_pending_tasklet);
562 tasklet_disable(&local->tasklet);
568 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
570 struct ieee80211_local *local = hw_to_local(hw);
571 struct sta_info *sta;
572 struct ieee80211_sub_if_data *sdata;
573 u16 start_seq_num = 0;
576 DECLARE_MAC_BUF(mac);
578 if (tid >= STA_TID_NUM)
581 #ifdef CONFIG_MAC80211_HT_DEBUG
582 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
583 print_mac(mac, ra), tid);
584 #endif /* CONFIG_MAC80211_HT_DEBUG */
588 sta = sta_info_get(local, ra);
590 #ifdef CONFIG_MAC80211_HT_DEBUG
591 printk(KERN_DEBUG "Could not find the station\n");
597 spin_lock_bh(&sta->lock);
599 /* we have tried too many times, receiver does not want A-MPDU */
600 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
605 state = &sta->ampdu_mlme.tid_state_tx[tid];
606 /* check if the TID is not in aggregation flow already */
607 if (*state != HT_AGG_STATE_IDLE) {
608 #ifdef CONFIG_MAC80211_HT_DEBUG
609 printk(KERN_DEBUG "BA request denied - session is not "
610 "idle on tid %u\n", tid);
611 #endif /* CONFIG_MAC80211_HT_DEBUG */
616 /* prepare A-MPDU MLME for Tx aggregation */
617 sta->ampdu_mlme.tid_tx[tid] =
618 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
619 if (!sta->ampdu_mlme.tid_tx[tid]) {
620 #ifdef CONFIG_MAC80211_HT_DEBUG
622 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
629 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
630 sta_addba_resp_timer_expired;
631 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
632 (unsigned long)&sta->timer_to_tid[tid];
633 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
635 /* ensure that TX flow won't interrupt us
636 * until the end of the call to requeue function */
637 spin_lock_bh(&local->mdev->queue_lock);
639 /* create a new queue for this aggregation */
640 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
642 /* case no queue is available to aggregation
643 * don't switch to aggregation */
645 #ifdef CONFIG_MAC80211_HT_DEBUG
646 printk(KERN_DEBUG "BA request denied - queue unavailable for"
648 #endif /* CONFIG_MAC80211_HT_DEBUG */
649 goto err_unlock_queue;
653 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
654 * call back right away, it must see that the flow has begun */
655 *state |= HT_ADDBA_REQUESTED_MSK;
657 if (local->ops->ampdu_action)
658 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
659 ra, tid, &start_seq_num);
662 /* No need to requeue the packets in the agg queue, since we
663 * held the tx lock: no packet could be enqueued to the newly
665 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
666 #ifdef CONFIG_MAC80211_HT_DEBUG
667 printk(KERN_DEBUG "BA request denied - HW unavailable for"
669 #endif /* CONFIG_MAC80211_HT_DEBUG */
670 *state = HT_AGG_STATE_IDLE;
671 goto err_unlock_queue;
674 /* Will put all the packets in the new SW queue */
675 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
676 spin_unlock_bh(&local->mdev->queue_lock);
677 spin_unlock_bh(&sta->lock);
679 /* send an addBA request */
680 sta->ampdu_mlme.dialog_token_allocator++;
681 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
682 sta->ampdu_mlme.dialog_token_allocator;
683 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
686 ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
687 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
688 sta->ampdu_mlme.tid_tx[tid]->ssn,
690 /* activate the timer for the recipient's addBA response */
691 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
692 jiffies + ADDBA_RESP_INTERVAL;
693 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
694 #ifdef CONFIG_MAC80211_HT_DEBUG
695 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
700 kfree(sta->ampdu_mlme.tid_tx[tid]);
701 sta->ampdu_mlme.tid_tx[tid] = NULL;
702 spin_unlock_bh(&local->mdev->queue_lock);
705 spin_unlock_bh(&sta->lock);
710 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
712 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
714 enum ieee80211_back_parties initiator)
716 struct ieee80211_local *local = hw_to_local(hw);
717 struct sta_info *sta;
720 DECLARE_MAC_BUF(mac);
722 if (tid >= STA_TID_NUM)
726 sta = sta_info_get(local, ra);
732 /* check if the TID is in aggregation */
733 state = &sta->ampdu_mlme.tid_state_tx[tid];
734 spin_lock_bh(&sta->lock);
736 if (*state != HT_AGG_STATE_OPERATIONAL) {
741 #ifdef CONFIG_MAC80211_HT_DEBUG
742 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
743 print_mac(mac, ra), tid);
744 #endif /* CONFIG_MAC80211_HT_DEBUG */
746 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
748 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
749 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
751 if (local->ops->ampdu_action)
752 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
755 /* case HW denied going back to legacy */
757 WARN_ON(ret != -EBUSY);
758 *state = HT_AGG_STATE_OPERATIONAL;
759 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
764 spin_unlock_bh(&sta->lock);
768 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
770 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
772 struct ieee80211_local *local = hw_to_local(hw);
773 struct sta_info *sta;
775 DECLARE_MAC_BUF(mac);
777 if (tid >= STA_TID_NUM) {
778 #ifdef CONFIG_MAC80211_HT_DEBUG
779 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
786 sta = sta_info_get(local, ra);
789 #ifdef CONFIG_MAC80211_HT_DEBUG
790 printk(KERN_DEBUG "Could not find station: %s\n",
796 state = &sta->ampdu_mlme.tid_state_tx[tid];
797 spin_lock_bh(&sta->lock);
799 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
800 #ifdef CONFIG_MAC80211_HT_DEBUG
801 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
804 spin_unlock_bh(&sta->lock);
809 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
811 *state |= HT_ADDBA_DRV_READY_MSK;
813 if (*state == HT_AGG_STATE_OPERATIONAL) {
814 #ifdef CONFIG_MAC80211_HT_DEBUG
815 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
817 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
819 spin_unlock_bh(&sta->lock);
822 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
824 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
826 struct ieee80211_local *local = hw_to_local(hw);
827 struct sta_info *sta;
830 DECLARE_MAC_BUF(mac);
832 if (tid >= STA_TID_NUM) {
833 #ifdef CONFIG_MAC80211_HT_DEBUG
834 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
840 #ifdef CONFIG_MAC80211_HT_DEBUG
841 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
842 print_mac(mac, ra), tid);
843 #endif /* CONFIG_MAC80211_HT_DEBUG */
846 sta = sta_info_get(local, ra);
848 #ifdef CONFIG_MAC80211_HT_DEBUG
849 printk(KERN_DEBUG "Could not find station: %s\n",
855 state = &sta->ampdu_mlme.tid_state_tx[tid];
857 /* NOTE: no need to use sta->lock in this state check, as
858 * ieee80211_stop_tx_ba_session will let only
859 * one stop call to pass through per sta/tid */
860 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
861 #ifdef CONFIG_MAC80211_HT_DEBUG
862 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
868 if (*state & HT_AGG_STATE_INITIATOR_MSK)
869 ieee80211_send_delba(sta->sdata->dev, ra, tid,
870 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
872 agg_queue = sta->tid_to_tx_q[tid];
874 /* avoid ordering issues: we are the only one that can modify
875 * the content of the qdiscs */
876 spin_lock_bh(&local->mdev->queue_lock);
877 /* remove the queue for this aggregation */
878 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
879 spin_unlock_bh(&local->mdev->queue_lock);
881 /* we just requeued the all the frames that were in the removed
882 * queue, and since we might miss a softirq we do netif_schedule.
883 * ieee80211_wake_queue is not used here as this queue is not
884 * necessarily stopped */
885 netif_schedule(local->mdev);
886 spin_lock_bh(&sta->lock);
887 *state = HT_AGG_STATE_IDLE;
888 sta->ampdu_mlme.addba_req_num[tid] = 0;
889 kfree(sta->ampdu_mlme.tid_tx[tid]);
890 sta->ampdu_mlme.tid_tx[tid] = NULL;
891 spin_unlock_bh(&sta->lock);
895 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
897 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
898 const u8 *ra, u16 tid)
900 struct ieee80211_local *local = hw_to_local(hw);
901 struct ieee80211_ra_tid *ra_tid;
902 struct sk_buff *skb = dev_alloc_skb(0);
904 if (unlikely(!skb)) {
905 #ifdef CONFIG_MAC80211_HT_DEBUG
907 printk(KERN_WARNING "%s: Not enough memory, "
908 "dropping start BA session", skb->dev->name);
912 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
913 memcpy(&ra_tid->ra, ra, ETH_ALEN);
916 skb->pkt_type = IEEE80211_ADDBA_MSG;
917 skb_queue_tail(&local->skb_queue, skb);
918 tasklet_schedule(&local->tasklet);
920 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
922 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
923 const u8 *ra, u16 tid)
925 struct ieee80211_local *local = hw_to_local(hw);
926 struct ieee80211_ra_tid *ra_tid;
927 struct sk_buff *skb = dev_alloc_skb(0);
929 if (unlikely(!skb)) {
930 #ifdef CONFIG_MAC80211_HT_DEBUG
932 printk(KERN_WARNING "%s: Not enough memory, "
933 "dropping stop BA session", skb->dev->name);
937 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
938 memcpy(&ra_tid->ra, ra, ETH_ALEN);
941 skb->pkt_type = IEEE80211_DELBA_MSG;
942 skb_queue_tail(&local->skb_queue, skb);
943 tasklet_schedule(&local->tasklet);
945 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
947 static void ieee80211_set_multicast_list(struct net_device *dev)
949 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
950 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
951 int allmulti, promisc, sdata_allmulti, sdata_promisc;
953 allmulti = !!(dev->flags & IFF_ALLMULTI);
954 promisc = !!(dev->flags & IFF_PROMISC);
955 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
956 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
958 if (allmulti != sdata_allmulti) {
959 if (dev->flags & IFF_ALLMULTI)
960 atomic_inc(&local->iff_allmultis);
962 atomic_dec(&local->iff_allmultis);
963 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
966 if (promisc != sdata_promisc) {
967 if (dev->flags & IFF_PROMISC)
968 atomic_inc(&local->iff_promiscs);
970 atomic_dec(&local->iff_promiscs);
971 sdata->flags ^= IEEE80211_SDATA_PROMISC;
974 dev_mc_sync(local->mdev, dev);
977 static const struct header_ops ieee80211_header_ops = {
978 .create = eth_header,
979 .parse = header_parse_80211,
980 .rebuild = eth_rebuild_header,
981 .cache = eth_header_cache,
982 .cache_update = eth_header_cache_update,
985 /* Must not be called for mdev */
986 void ieee80211_if_setup(struct net_device *dev)
989 dev->hard_start_xmit = ieee80211_subif_start_xmit;
990 dev->wireless_handlers = &ieee80211_iw_handler_def;
991 dev->set_multicast_list = ieee80211_set_multicast_list;
992 dev->change_mtu = ieee80211_change_mtu;
993 dev->open = ieee80211_open;
994 dev->stop = ieee80211_stop;
995 dev->destructor = ieee80211_if_free;
998 /* everything else */
1000 static int __ieee80211_if_config(struct net_device *dev,
1001 struct sk_buff *beacon)
1003 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1004 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1005 struct ieee80211_if_conf conf;
1007 if (!local->ops->config_interface || !netif_running(dev))
1010 memset(&conf, 0, sizeof(conf));
1011 conf.type = sdata->vif.type;
1012 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1013 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1014 conf.bssid = sdata->u.sta.bssid;
1015 conf.ssid = sdata->u.sta.ssid;
1016 conf.ssid_len = sdata->u.sta.ssid_len;
1017 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1018 conf.beacon = beacon;
1019 ieee80211_start_mesh(dev);
1020 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1021 conf.ssid = sdata->u.ap.ssid;
1022 conf.ssid_len = sdata->u.ap.ssid_len;
1023 conf.beacon = beacon;
1025 return local->ops->config_interface(local_to_hw(local),
1026 &sdata->vif, &conf);
1029 int ieee80211_if_config(struct net_device *dev)
1031 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1032 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1033 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
1034 (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1035 return ieee80211_if_config_beacon(dev);
1036 return __ieee80211_if_config(dev, NULL);
1039 int ieee80211_if_config_beacon(struct net_device *dev)
1041 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1042 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1043 struct sk_buff *skb;
1045 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1047 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif);
1050 return __ieee80211_if_config(dev, skb);
1053 int ieee80211_hw_config(struct ieee80211_local *local)
1055 struct ieee80211_channel *chan;
1058 if (local->sta_sw_scanning)
1059 chan = local->scan_channel;
1061 chan = local->oper_channel;
1063 local->hw.conf.channel = chan;
1065 if (!local->hw.conf.power_level)
1066 local->hw.conf.power_level = chan->max_power;
1068 local->hw.conf.power_level = min(chan->max_power,
1069 local->hw.conf.power_level);
1071 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1073 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1074 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1075 wiphy_name(local->hw.wiphy), chan->center_freq);
1078 if (local->open_count)
1079 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1085 * ieee80211_handle_ht should be used only after legacy configuration
1086 * has been determined namely band, as ht configuration depends upon
1087 * the hardware's HT abilities for a _specific_ band.
1089 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1090 struct ieee80211_ht_info *req_ht_cap,
1091 struct ieee80211_ht_bss_info *req_bss_cap)
1093 struct ieee80211_conf *conf = &local->hw.conf;
1094 struct ieee80211_supported_band *sband;
1095 struct ieee80211_ht_info ht_conf;
1096 struct ieee80211_ht_bss_info ht_bss_conf;
1099 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1102 sband = local->hw.wiphy->bands[conf->channel->band];
1104 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1105 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1107 /* HT is not supported */
1108 if (!sband->ht_info.ht_supported) {
1109 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1115 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1116 changed |= BSS_CHANGED_HT;
1117 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1118 conf->ht_conf.ht_supported = 0;
1123 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1124 changed |= BSS_CHANGED_HT;
1126 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1127 ht_conf.ht_supported = 1;
1129 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1130 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1131 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1132 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1133 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1134 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1136 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1137 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1140 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1142 /* configure suppoerted Tx MCS according to requested MCS
1143 * (based in most cases on Rx capabilities of peer) and self
1144 * Tx MCS capabilities (as defined by low level driver HW
1145 * Tx capabilities) */
1146 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1149 /* Counting from 0 therfore + 1 */
1150 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1151 max_tx_streams = ((tx_mcs_set_cap &
1152 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1154 for (i = 0; i < max_tx_streams; i++)
1155 ht_conf.supp_mcs_set[i] =
1156 sband->ht_info.supp_mcs_set[i] &
1157 req_ht_cap->supp_mcs_set[i];
1159 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1160 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1161 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1162 ht_conf.supp_mcs_set[i] =
1163 sband->ht_info.supp_mcs_set[i] &
1164 req_ht_cap->supp_mcs_set[i];
1167 /* if bss configuration changed store the new one */
1168 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1169 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1170 changed |= BSS_CHANGED_HT;
1171 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1172 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1178 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1181 struct ieee80211_local *local = sdata->local;
1186 if (local->ops->bss_info_changed)
1187 local->ops->bss_info_changed(local_to_hw(local),
1193 void ieee80211_reset_erp_info(struct net_device *dev)
1195 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1197 sdata->bss_conf.use_cts_prot = 0;
1198 sdata->bss_conf.use_short_preamble = 0;
1199 ieee80211_bss_info_change_notify(sdata,
1200 BSS_CHANGED_ERP_CTS_PROT |
1201 BSS_CHANGED_ERP_PREAMBLE);
1204 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1205 struct sk_buff *skb)
1207 struct ieee80211_local *local = hw_to_local(hw);
1208 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1211 skb->dev = local->mdev;
1212 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1213 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
1214 &local->skb_queue : &local->skb_queue_unreliable, skb);
1215 tmp = skb_queue_len(&local->skb_queue) +
1216 skb_queue_len(&local->skb_queue_unreliable);
1217 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1218 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1219 dev_kfree_skb_irq(skb);
1221 I802_DEBUG_INC(local->tx_status_drop);
1223 tasklet_schedule(&local->tasklet);
1225 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1227 static void ieee80211_tasklet_handler(unsigned long data)
1229 struct ieee80211_local *local = (struct ieee80211_local *) data;
1230 struct sk_buff *skb;
1231 struct ieee80211_rx_status rx_status;
1232 struct ieee80211_ra_tid *ra_tid;
1234 while ((skb = skb_dequeue(&local->skb_queue)) ||
1235 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1236 switch (skb->pkt_type) {
1237 case IEEE80211_RX_MSG:
1238 /* status is in skb->cb */
1239 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1240 /* Clear skb->pkt_type in order to not confuse kernel
1243 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1245 case IEEE80211_TX_STATUS_MSG:
1247 ieee80211_tx_status(local_to_hw(local), skb);
1249 case IEEE80211_DELBA_MSG:
1250 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1251 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1252 ra_tid->ra, ra_tid->tid);
1255 case IEEE80211_ADDBA_MSG:
1256 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1257 ieee80211_start_tx_ba_cb(local_to_hw(local),
1258 ra_tid->ra, ra_tid->tid);
1269 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1270 * make a prepared TX frame (one that has been given to hw) to look like brand
1271 * new IEEE 802.11 frame that is ready to go through TX processing again.
1272 * Also, tx_packet_data in cb is restored from tx_control. */
1273 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1274 struct ieee80211_key *key,
1275 struct sk_buff *skb)
1277 int hdrlen, iv_len, mic_len;
1278 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1280 info->flags &= IEEE80211_TX_CTL_REQ_TX_STATUS |
1281 IEEE80211_TX_CTL_DO_NOT_ENCRYPT |
1282 IEEE80211_TX_CTL_REQUEUE |
1283 IEEE80211_TX_CTL_EAPOL_FRAME;
1285 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1290 switch (key->conf.alg) {
1292 iv_len = WEP_IV_LEN;
1293 mic_len = WEP_ICV_LEN;
1296 iv_len = TKIP_IV_LEN;
1297 mic_len = TKIP_ICV_LEN;
1300 iv_len = CCMP_HDR_LEN;
1301 mic_len = CCMP_MIC_LEN;
1307 if (skb->len >= mic_len &&
1308 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1309 skb_trim(skb, skb->len - mic_len);
1310 if (skb->len >= iv_len && skb->len > hdrlen) {
1311 memmove(skb->data + iv_len, skb->data, hdrlen);
1312 skb_pull(skb, iv_len);
1317 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1318 u16 fc = le16_to_cpu(hdr->frame_control);
1319 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1320 fc &= ~IEEE80211_STYPE_QOS_DATA;
1321 hdr->frame_control = cpu_to_le16(fc);
1322 memmove(skb->data + 2, skb->data, hdrlen - 2);
1328 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1329 struct sta_info *sta,
1330 struct sk_buff *skb)
1332 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1334 sta->tx_filtered_count++;
1337 * Clear the TX filter mask for this STA when sending the next
1338 * packet. If the STA went to power save mode, this will happen
1339 * when it wakes up for the next time.
1341 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1344 * This code races in the following way:
1346 * (1) STA sends frame indicating it will go to sleep and does so
1347 * (2) hardware/firmware adds STA to filter list, passes frame up
1348 * (3) hardware/firmware processes TX fifo and suppresses a frame
1349 * (4) we get TX status before having processed the frame and
1350 * knowing that the STA has gone to sleep.
1352 * This is actually quite unlikely even when both those events are
1353 * processed from interrupts coming in quickly after one another or
1354 * even at the same time because we queue both TX status events and
1355 * RX frames to be processed by a tasklet and process them in the
1356 * same order that they were received or TX status last. Hence, there
1357 * is no race as long as the frame RX is processed before the next TX
1358 * status, which drivers can ensure, see below.
1360 * Note that this can only happen if the hardware or firmware can
1361 * actually add STAs to the filter list, if this is done by the
1362 * driver in response to set_tim() (which will only reduce the race
1363 * this whole filtering tries to solve, not completely solve it)
1364 * this situation cannot happen.
1366 * To completely solve this race drivers need to make sure that they
1367 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1369 * (b) always process RX events before TX status events if ordering
1370 * can be unknown, for example with different interrupt status
1373 if (test_sta_flags(sta, WLAN_STA_PS) &&
1374 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1375 ieee80211_remove_tx_extra(local, sta->key, skb);
1376 skb_queue_tail(&sta->tx_filtered, skb);
1380 if (!test_sta_flags(sta, WLAN_STA_PS) &&
1381 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1382 /* Software retry the packet once */
1383 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1384 ieee80211_remove_tx_extra(local, sta->key, skb);
1385 dev_queue_xmit(skb);
1389 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1390 if (net_ratelimit())
1391 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1392 "queue_len=%d PS=%d @%lu\n",
1393 wiphy_name(local->hw.wiphy),
1394 skb_queue_len(&sta->tx_filtered),
1395 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1400 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1402 struct sk_buff *skb2;
1403 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1404 struct ieee80211_local *local = hw_to_local(hw);
1405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1407 struct ieee80211_tx_status_rtap_hdr *rthdr;
1408 struct ieee80211_sub_if_data *sdata;
1409 struct net_device *prev_dev = NULL;
1413 if (info->status.excessive_retries) {
1414 struct sta_info *sta;
1415 sta = sta_info_get(local, hdr->addr1);
1417 if (test_sta_flags(sta, WLAN_STA_PS)) {
1419 * The STA is in power save mode, so assume
1420 * that this TX packet failed because of that.
1422 ieee80211_handle_filtered_frame(local, sta, skb);
1429 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1430 struct sta_info *sta;
1431 sta = sta_info_get(local, hdr->addr1);
1433 ieee80211_handle_filtered_frame(local, sta, skb);
1438 rate_control_tx_status(local->mdev, skb);
1442 ieee80211_led_tx(local, 0);
1445 * Fragments are passed to low-level drivers as separate skbs, so these
1446 * are actually fragments, not frames. Update frame counters only for
1447 * the first fragment of the frame. */
1449 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1450 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1452 if (info->flags & IEEE80211_TX_STAT_ACK) {
1454 local->dot11TransmittedFrameCount++;
1455 if (is_multicast_ether_addr(hdr->addr1))
1456 local->dot11MulticastTransmittedFrameCount++;
1457 if (info->status.retry_count > 0)
1458 local->dot11RetryCount++;
1459 if (info->status.retry_count > 1)
1460 local->dot11MultipleRetryCount++;
1463 /* This counter shall be incremented for an acknowledged MPDU
1464 * with an individual address in the address 1 field or an MPDU
1465 * with a multicast address in the address 1 field of type Data
1467 if (!is_multicast_ether_addr(hdr->addr1) ||
1468 type == IEEE80211_FTYPE_DATA ||
1469 type == IEEE80211_FTYPE_MGMT)
1470 local->dot11TransmittedFragmentCount++;
1473 local->dot11FailedCount++;
1476 /* this was a transmitted frame, but now we want to reuse it */
1480 * This is a bit racy but we can avoid a lot of work
1483 if (!local->monitors && !local->cooked_mntrs) {
1488 /* send frame to monitor interfaces now */
1490 if (skb_headroom(skb) < sizeof(*rthdr)) {
1491 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1496 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1497 skb_push(skb, sizeof(*rthdr));
1499 memset(rthdr, 0, sizeof(*rthdr));
1500 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1501 rthdr->hdr.it_present =
1502 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1503 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1505 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1506 !is_multicast_ether_addr(hdr->addr1))
1507 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1509 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1510 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1511 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1512 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1513 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1515 rthdr->data_retries = info->status.retry_count;
1517 /* XXX: is this sufficient for BPF? */
1518 skb_set_mac_header(skb, 0);
1519 skb->ip_summed = CHECKSUM_UNNECESSARY;
1520 skb->pkt_type = PACKET_OTHERHOST;
1521 skb->protocol = htons(ETH_P_802_2);
1522 memset(skb->cb, 0, sizeof(skb->cb));
1525 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1526 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1527 if (!netif_running(sdata->dev))
1531 skb2 = skb_clone(skb, GFP_ATOMIC);
1533 skb2->dev = prev_dev;
1538 prev_dev = sdata->dev;
1542 skb->dev = prev_dev;
1549 EXPORT_SYMBOL(ieee80211_tx_status);
1551 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1552 const struct ieee80211_ops *ops)
1554 struct ieee80211_local *local;
1556 struct wiphy *wiphy;
1558 /* Ensure 32-byte alignment of our private data and hw private data.
1559 * We use the wiphy priv data for both our ieee80211_local and for
1560 * the driver's private data
1562 * In memory it'll be like this:
1564 * +-------------------------+
1566 * +-------------------------+
1567 * | struct ieee80211_local |
1568 * +-------------------------+
1569 * | driver's private data |
1570 * +-------------------------+
1573 priv_size = ((sizeof(struct ieee80211_local) +
1574 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1577 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1582 wiphy->privid = mac80211_wiphy_privid;
1584 local = wiphy_priv(wiphy);
1585 local->hw.wiphy = wiphy;
1587 local->hw.priv = (char *)local +
1588 ((sizeof(struct ieee80211_local) +
1589 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1592 BUG_ON(!ops->start);
1594 BUG_ON(!ops->config);
1595 BUG_ON(!ops->add_interface);
1596 BUG_ON(!ops->remove_interface);
1597 BUG_ON(!ops->configure_filter);
1600 local->hw.queues = 1; /* default */
1602 local->bridge_packets = 1;
1604 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1605 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1606 local->short_retry_limit = 7;
1607 local->long_retry_limit = 4;
1608 local->hw.conf.radio_enabled = 1;
1610 INIT_LIST_HEAD(&local->interfaces);
1612 spin_lock_init(&local->key_lock);
1614 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1616 sta_info_init(local);
1618 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1619 (unsigned long)local);
1620 tasklet_disable(&local->tx_pending_tasklet);
1622 tasklet_init(&local->tasklet,
1623 ieee80211_tasklet_handler,
1624 (unsigned long) local);
1625 tasklet_disable(&local->tasklet);
1627 skb_queue_head_init(&local->skb_queue);
1628 skb_queue_head_init(&local->skb_queue_unreliable);
1630 return local_to_hw(local);
1632 EXPORT_SYMBOL(ieee80211_alloc_hw);
1634 int ieee80211_register_hw(struct ieee80211_hw *hw)
1636 struct ieee80211_local *local = hw_to_local(hw);
1639 enum ieee80211_band band;
1640 struct net_device *mdev;
1641 struct ieee80211_sub_if_data *sdata;
1644 * generic code guarantees at least one band,
1645 * set this very early because much code assumes
1646 * that hw.conf.channel is assigned
1648 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1649 struct ieee80211_supported_band *sband;
1651 sband = local->hw.wiphy->bands[band];
1653 /* init channel we're on */
1654 local->hw.conf.channel =
1655 local->oper_channel =
1656 local->scan_channel = &sband->channels[0];
1661 result = wiphy_register(local->hw.wiphy);
1666 * We use the number of queues for feature tests (QoS, HT) internally
1667 * so restrict them appropriately.
1669 #ifdef CONFIG_MAC80211_QOS
1670 if (hw->queues > IEEE80211_MAX_QUEUES)
1671 hw->queues = IEEE80211_MAX_QUEUES;
1672 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1673 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1675 hw->ampdu_queues = 0;
1678 hw->ampdu_queues = 0;
1681 /* for now, mdev needs sub_if_data :/ */
1682 mdev = alloc_netdev_mq(sizeof(struct ieee80211_sub_if_data),
1683 "wmaster%d", ether_setup,
1684 ieee80211_num_queues(hw));
1686 goto fail_mdev_alloc;
1688 if (ieee80211_num_queues(hw) > 1)
1689 mdev->features |= NETIF_F_MULTI_QUEUE;
1691 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1692 mdev->ieee80211_ptr = &sdata->wdev;
1693 sdata->wdev.wiphy = local->hw.wiphy;
1697 ieee80211_rx_bss_list_init(mdev);
1699 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1700 mdev->open = ieee80211_master_open;
1701 mdev->stop = ieee80211_master_stop;
1702 mdev->type = ARPHRD_IEEE80211;
1703 mdev->header_ops = &ieee80211_header_ops;
1704 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1706 sdata->vif.type = IEEE80211_IF_TYPE_AP;
1708 sdata->local = local;
1709 sdata->u.ap.force_unicast_rateidx = -1;
1710 sdata->u.ap.max_ratectrl_rateidx = -1;
1711 ieee80211_if_sdata_init(sdata);
1713 /* no RCU needed since we're still during init phase */
1714 list_add_tail(&sdata->list, &local->interfaces);
1716 name = wiphy_dev(local->hw.wiphy)->driver->name;
1717 local->hw.workqueue = create_freezeable_workqueue(name);
1718 if (!local->hw.workqueue) {
1720 goto fail_workqueue;
1724 * The hardware needs headroom for sending the frame,
1725 * and we need some headroom for passing the frame to monitor
1726 * interfaces, but never both at the same time.
1728 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1729 sizeof(struct ieee80211_tx_status_rtap_hdr));
1731 debugfs_hw_add(local);
1733 if (local->hw.conf.beacon_int < 10)
1734 local->hw.conf.beacon_int = 100;
1736 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1737 IEEE80211_HW_SIGNAL_DB |
1738 IEEE80211_HW_SIGNAL_DBM) ?
1739 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1740 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1741 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1742 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1743 local->wstats_flags |= IW_QUAL_DBM;
1745 result = sta_info_start(local);
1750 result = dev_alloc_name(local->mdev, local->mdev->name);
1754 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1755 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1757 result = register_netdevice(local->mdev);
1761 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1762 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1764 result = ieee80211_init_rate_ctrl_alg(local,
1765 hw->rate_control_algorithm);
1767 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1768 "algorithm\n", wiphy_name(local->hw.wiphy));
1772 result = ieee80211_wep_init(local);
1775 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1776 wiphy_name(local->hw.wiphy));
1780 ieee80211_install_qdisc(local->mdev);
1782 /* add one default STA interface */
1783 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1784 IEEE80211_IF_TYPE_STA, NULL);
1786 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1787 wiphy_name(local->hw.wiphy));
1789 local->reg_state = IEEE80211_DEV_REGISTERED;
1792 ieee80211_led_init(local);
1797 rate_control_deinitialize(local);
1799 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1800 unregister_netdevice(local->mdev);
1804 sta_info_stop(local);
1806 debugfs_hw_del(local);
1807 destroy_workqueue(local->hw.workqueue);
1809 if (local->mdev != NULL) {
1810 ieee80211_if_free(local->mdev);
1814 wiphy_unregister(local->hw.wiphy);
1817 EXPORT_SYMBOL(ieee80211_register_hw);
1819 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1821 struct ieee80211_local *local = hw_to_local(hw);
1822 struct ieee80211_sub_if_data *sdata, *tmp;
1824 tasklet_kill(&local->tx_pending_tasklet);
1825 tasklet_kill(&local->tasklet);
1829 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1831 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1834 * At this point, interface list manipulations are fine
1835 * because the driver cannot be handing us frames any
1836 * more and the tasklet is killed.
1840 * First, we remove all non-master interfaces. Do this because they
1841 * may have bss pointer dependency on the master, and when we free
1842 * the master these would be freed as well, breaking our list
1843 * iteration completely.
1845 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1846 if (sdata->dev == local->mdev)
1848 list_del(&sdata->list);
1849 __ieee80211_if_del(local, sdata);
1852 /* then, finally, remove the master interface */
1853 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1857 ieee80211_rx_bss_list_deinit(local->mdev);
1858 ieee80211_clear_tx_pending(local);
1859 sta_info_stop(local);
1860 rate_control_deinitialize(local);
1861 debugfs_hw_del(local);
1863 if (skb_queue_len(&local->skb_queue)
1864 || skb_queue_len(&local->skb_queue_unreliable))
1865 printk(KERN_WARNING "%s: skb_queue not empty\n",
1866 wiphy_name(local->hw.wiphy));
1867 skb_queue_purge(&local->skb_queue);
1868 skb_queue_purge(&local->skb_queue_unreliable);
1870 destroy_workqueue(local->hw.workqueue);
1871 wiphy_unregister(local->hw.wiphy);
1872 ieee80211_wep_free(local);
1873 ieee80211_led_exit(local);
1874 ieee80211_if_free(local->mdev);
1877 EXPORT_SYMBOL(ieee80211_unregister_hw);
1879 void ieee80211_free_hw(struct ieee80211_hw *hw)
1881 struct ieee80211_local *local = hw_to_local(hw);
1883 wiphy_free(local->hw.wiphy);
1885 EXPORT_SYMBOL(ieee80211_free_hw);
1887 static int __init ieee80211_init(void)
1889 struct sk_buff *skb;
1892 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1893 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1894 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1896 ret = rc80211_pid_init();
1900 ret = ieee80211_wme_register();
1902 printk(KERN_DEBUG "ieee80211_init: failed to "
1903 "initialize WME (err=%d)\n", ret);
1904 goto out_cleanup_pid;
1907 ieee80211_debugfs_netdev_init();
1917 static void __exit ieee80211_exit(void)
1922 * For key todo, it'll be empty by now but the work
1923 * might still be scheduled.
1925 flush_scheduled_work();
1930 ieee80211_wme_unregister();
1931 ieee80211_debugfs_netdev_exit();
1935 subsys_initcall(ieee80211_init);
1936 module_exit(ieee80211_exit);
1938 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1939 MODULE_LICENSE("GPL");