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 sta_info *sta;
186 struct ieee80211_if_init_conf conf;
189 bool need_hw_reconfig = 0;
191 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
193 /* we hold the RTNL here so can safely walk the list */
194 list_for_each_entry(nsdata, &local->interfaces, list) {
195 struct net_device *ndev = nsdata->dev;
197 if (ndev != dev && ndev != local->mdev && netif_running(ndev)) {
199 * Allow only a single IBSS interface to be up at any
200 * time. This is restricted because beacon distribution
201 * cannot work properly if both are in the same IBSS.
203 * To remove this restriction we'd have to disallow them
204 * from setting the same SSID on different IBSS interfaces
205 * belonging to the same hardware. Then, however, we're
206 * faced with having to adopt two different TSF timers...
208 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
209 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
213 * Disallow multiple IBSS/STA mode interfaces.
215 * This is a technical restriction, it is possible although
216 * most likely not IEEE 802.11 compliant to have multiple
217 * STAs with just a single hardware (the TSF timer will not
218 * be adjusted properly.)
220 * However, because mac80211 uses the master device's BSS
221 * information for each STA/IBSS interface, doing this will
222 * currently corrupt that BSS information completely, unless,
223 * a not very useful case, both STAs are associated to the
226 * To remove this restriction, the BSS information needs to
227 * be embedded in the STA/IBSS mode sdata instead of using
228 * the master device's BSS structure.
230 if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
231 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
232 (nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
233 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
237 * The remaining checks are only performed for interfaces
238 * with the same MAC address.
240 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
244 * check whether it may have the same address
246 if (!identical_mac_addr_allowed(sdata->vif.type,
251 * can only add VLANs to enabled APs
253 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
254 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
255 sdata->u.vlan.ap = nsdata;
259 switch (sdata->vif.type) {
260 case IEEE80211_IF_TYPE_WDS:
261 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
264 case IEEE80211_IF_TYPE_VLAN:
265 if (!sdata->u.vlan.ap)
268 case IEEE80211_IF_TYPE_AP:
269 case IEEE80211_IF_TYPE_STA:
270 case IEEE80211_IF_TYPE_MNTR:
271 case IEEE80211_IF_TYPE_IBSS:
272 case IEEE80211_IF_TYPE_MESH_POINT:
273 /* no special treatment */
275 case IEEE80211_IF_TYPE_INVALID:
281 if (local->open_count == 0) {
283 if (local->ops->start)
284 res = local->ops->start(local_to_hw(local));
287 need_hw_reconfig = 1;
288 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
291 switch (sdata->vif.type) {
292 case IEEE80211_IF_TYPE_VLAN:
293 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
294 /* no need to tell driver */
296 case IEEE80211_IF_TYPE_MNTR:
297 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
298 local->cooked_mntrs++;
302 /* must be before the call to ieee80211_configure_filter */
304 if (local->monitors == 1)
305 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
307 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
308 local->fif_fcsfail++;
309 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
310 local->fif_plcpfail++;
311 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
312 local->fif_control++;
313 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
314 local->fif_other_bss++;
316 netif_tx_lock_bh(local->mdev);
317 ieee80211_configure_filter(local);
318 netif_tx_unlock_bh(local->mdev);
320 case IEEE80211_IF_TYPE_STA:
321 case IEEE80211_IF_TYPE_IBSS:
322 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
325 conf.vif = &sdata->vif;
326 conf.type = sdata->vif.type;
327 conf.mac_addr = dev->dev_addr;
328 res = local->ops->add_interface(local_to_hw(local), &conf);
332 ieee80211_if_config(dev);
333 changed |= ieee80211_reset_erp_info(dev);
334 ieee80211_bss_info_change_notify(sdata, changed);
335 ieee80211_enable_keys(sdata);
337 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
338 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
339 netif_carrier_off(dev);
341 netif_carrier_on(dev);
344 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
345 /* Create STA entry for the WDS peer */
346 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
350 goto err_del_interface;
353 /* no locking required since STA is not live yet */
354 sta->flags |= WLAN_STA_AUTHORIZED;
356 res = sta_info_insert(sta);
358 /* STA has been freed */
359 goto err_del_interface;
363 if (local->open_count == 0) {
364 res = dev_open(local->mdev);
367 goto err_del_interface;
368 tasklet_enable(&local->tx_pending_tasklet);
369 tasklet_enable(&local->tasklet);
373 * set_multicast_list will be invoked by the networking core
374 * which will check whether any increments here were done in
375 * error and sync them down to the hardware as filter flags.
377 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
378 atomic_inc(&local->iff_allmultis);
380 if (sdata->flags & IEEE80211_SDATA_PROMISC)
381 atomic_inc(&local->iff_promiscs);
384 if (need_hw_reconfig)
385 ieee80211_hw_config(local);
388 * ieee80211_sta_work is disabled while network interface
389 * is down. Therefore, some configuration changes may not
390 * yet be effective. Trigger execution of ieee80211_sta_work
393 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
394 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
395 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
396 queue_work(local->hw.workqueue, &ifsta->work);
399 netif_start_queue(dev);
403 local->ops->remove_interface(local_to_hw(local), &conf);
405 if (!local->open_count && local->ops->stop)
406 local->ops->stop(local_to_hw(local));
410 static int ieee80211_stop(struct net_device *dev)
412 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
413 struct ieee80211_local *local = sdata->local;
414 struct ieee80211_if_init_conf conf;
415 struct sta_info *sta;
418 * Stop TX on this interface first.
420 netif_stop_queue(dev);
423 * Now delete all active aggregation sessions.
427 list_for_each_entry_rcu(sta, &local->sta_list, list) {
428 if (sta->sdata == sdata)
429 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
435 * Remove all stations associated with this interface.
437 * This must be done before calling ops->remove_interface()
438 * because otherwise we can later invoke ops->sta_notify()
439 * whenever the STAs are removed, and that invalidates driver
440 * assumptions about always getting a vif pointer that is valid
441 * (because if we remove a STA after ops->remove_interface()
442 * the driver will have removed the vif info already!)
444 * We could relax this and only unlink the stations from the
445 * hash table and list but keep them on a per-sdata list that
446 * will be inserted back again when the interface is brought
447 * up again, but I don't currently see a use case for that,
448 * except with WDS which gets a STA entry created when it is
451 sta_info_flush(local, sdata);
454 * Don't count this interface for promisc/allmulti while it
455 * is down. dev_mc_unsync() will invoke set_multicast_list
456 * on the master interface which will sync these down to the
457 * hardware as filter flags.
459 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
460 atomic_dec(&local->iff_allmultis);
462 if (sdata->flags & IEEE80211_SDATA_PROMISC)
463 atomic_dec(&local->iff_promiscs);
465 dev_mc_unsync(local->mdev, dev);
467 /* APs need special treatment */
468 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
469 struct ieee80211_sub_if_data *vlan, *tmp;
470 struct beacon_data *old_beacon = sdata->u.ap.beacon;
473 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
477 /* down all dependent devices, that is VLANs */
478 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
480 dev_close(vlan->dev);
481 WARN_ON(!list_empty(&sdata->u.ap.vlans));
486 switch (sdata->vif.type) {
487 case IEEE80211_IF_TYPE_VLAN:
488 list_del(&sdata->u.vlan.list);
489 sdata->u.vlan.ap = NULL;
490 /* no need to tell driver */
492 case IEEE80211_IF_TYPE_MNTR:
493 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
494 local->cooked_mntrs--;
499 if (local->monitors == 0)
500 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
502 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
503 local->fif_fcsfail--;
504 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
505 local->fif_plcpfail--;
506 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
507 local->fif_control--;
508 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
509 local->fif_other_bss--;
511 netif_tx_lock_bh(local->mdev);
512 ieee80211_configure_filter(local);
513 netif_tx_unlock_bh(local->mdev);
515 case IEEE80211_IF_TYPE_MESH_POINT:
516 case IEEE80211_IF_TYPE_STA:
517 case IEEE80211_IF_TYPE_IBSS:
518 sdata->u.sta.state = IEEE80211_DISABLED;
519 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
520 del_timer_sync(&sdata->u.sta.timer);
522 * When we get here, the interface is marked down.
523 * Call synchronize_rcu() to wait for the RX path
524 * should it be using the interface and enqueuing
525 * frames at this very time on another CPU.
528 skb_queue_purge(&sdata->u.sta.skb_queue);
530 if (local->scan_dev == sdata->dev) {
531 if (!local->ops->hw_scan) {
532 local->sta_sw_scanning = 0;
533 cancel_delayed_work(&local->scan_work);
535 local->sta_hw_scanning = 0;
538 flush_workqueue(local->hw.workqueue);
540 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
541 kfree(sdata->u.sta.extra_ie);
542 sdata->u.sta.extra_ie = NULL;
543 sdata->u.sta.extra_ie_len = 0;
546 conf.vif = &sdata->vif;
547 conf.type = sdata->vif.type;
548 conf.mac_addr = dev->dev_addr;
549 /* disable all keys for as long as this netdev is down */
550 ieee80211_disable_keys(sdata);
551 local->ops->remove_interface(local_to_hw(local), &conf);
554 if (local->open_count == 0) {
555 if (netif_running(local->mdev))
556 dev_close(local->mdev);
558 if (local->ops->stop)
559 local->ops->stop(local_to_hw(local));
561 ieee80211_led_radio(local, 0);
563 tasklet_disable(&local->tx_pending_tasklet);
564 tasklet_disable(&local->tasklet);
570 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
572 struct ieee80211_local *local = hw_to_local(hw);
573 struct sta_info *sta;
574 struct ieee80211_sub_if_data *sdata;
575 u16 start_seq_num = 0;
578 DECLARE_MAC_BUF(mac);
580 if (tid >= STA_TID_NUM)
583 #ifdef CONFIG_MAC80211_HT_DEBUG
584 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
585 print_mac(mac, ra), tid);
586 #endif /* CONFIG_MAC80211_HT_DEBUG */
590 sta = sta_info_get(local, ra);
592 #ifdef CONFIG_MAC80211_HT_DEBUG
593 printk(KERN_DEBUG "Could not find the station\n");
599 spin_lock_bh(&sta->lock);
601 /* we have tried too many times, receiver does not want A-MPDU */
602 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
607 state = &sta->ampdu_mlme.tid_state_tx[tid];
608 /* check if the TID is not in aggregation flow already */
609 if (*state != HT_AGG_STATE_IDLE) {
610 #ifdef CONFIG_MAC80211_HT_DEBUG
611 printk(KERN_DEBUG "BA request denied - session is not "
612 "idle on tid %u\n", tid);
613 #endif /* CONFIG_MAC80211_HT_DEBUG */
618 /* prepare A-MPDU MLME for Tx aggregation */
619 sta->ampdu_mlme.tid_tx[tid] =
620 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
621 if (!sta->ampdu_mlme.tid_tx[tid]) {
622 #ifdef CONFIG_MAC80211_HT_DEBUG
624 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
631 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
632 sta_addba_resp_timer_expired;
633 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
634 (unsigned long)&sta->timer_to_tid[tid];
635 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
637 /* ensure that TX flow won't interrupt us
638 * until the end of the call to requeue function */
639 spin_lock_bh(&local->mdev->queue_lock);
641 /* create a new queue for this aggregation */
642 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
644 /* case no queue is available to aggregation
645 * don't switch to aggregation */
647 #ifdef CONFIG_MAC80211_HT_DEBUG
648 printk(KERN_DEBUG "BA request denied - queue unavailable for"
650 #endif /* CONFIG_MAC80211_HT_DEBUG */
651 goto err_unlock_queue;
655 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
656 * call back right away, it must see that the flow has begun */
657 *state |= HT_ADDBA_REQUESTED_MSK;
659 if (local->ops->ampdu_action)
660 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
661 ra, tid, &start_seq_num);
664 /* No need to requeue the packets in the agg queue, since we
665 * held the tx lock: no packet could be enqueued to the newly
667 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
668 #ifdef CONFIG_MAC80211_HT_DEBUG
669 printk(KERN_DEBUG "BA request denied - HW unavailable for"
671 #endif /* CONFIG_MAC80211_HT_DEBUG */
672 *state = HT_AGG_STATE_IDLE;
673 goto err_unlock_queue;
676 /* Will put all the packets in the new SW queue */
677 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
678 spin_unlock_bh(&local->mdev->queue_lock);
679 spin_unlock_bh(&sta->lock);
681 /* send an addBA request */
682 sta->ampdu_mlme.dialog_token_allocator++;
683 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
684 sta->ampdu_mlme.dialog_token_allocator;
685 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
688 ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
689 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
690 sta->ampdu_mlme.tid_tx[tid]->ssn,
692 /* activate the timer for the recipient's addBA response */
693 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
694 jiffies + ADDBA_RESP_INTERVAL;
695 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
696 #ifdef CONFIG_MAC80211_HT_DEBUG
697 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
702 kfree(sta->ampdu_mlme.tid_tx[tid]);
703 sta->ampdu_mlme.tid_tx[tid] = NULL;
704 spin_unlock_bh(&local->mdev->queue_lock);
707 spin_unlock_bh(&sta->lock);
712 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
714 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
716 enum ieee80211_back_parties initiator)
718 struct ieee80211_local *local = hw_to_local(hw);
719 struct sta_info *sta;
722 DECLARE_MAC_BUF(mac);
724 if (tid >= STA_TID_NUM)
728 sta = sta_info_get(local, ra);
734 /* check if the TID is in aggregation */
735 state = &sta->ampdu_mlme.tid_state_tx[tid];
736 spin_lock_bh(&sta->lock);
738 if (*state != HT_AGG_STATE_OPERATIONAL) {
743 #ifdef CONFIG_MAC80211_HT_DEBUG
744 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
745 print_mac(mac, ra), tid);
746 #endif /* CONFIG_MAC80211_HT_DEBUG */
748 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
750 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
751 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
753 if (local->ops->ampdu_action)
754 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
757 /* case HW denied going back to legacy */
759 WARN_ON(ret != -EBUSY);
760 *state = HT_AGG_STATE_OPERATIONAL;
761 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
766 spin_unlock_bh(&sta->lock);
770 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
772 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
774 struct ieee80211_local *local = hw_to_local(hw);
775 struct sta_info *sta;
777 DECLARE_MAC_BUF(mac);
779 if (tid >= STA_TID_NUM) {
780 #ifdef CONFIG_MAC80211_HT_DEBUG
781 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
788 sta = sta_info_get(local, ra);
791 #ifdef CONFIG_MAC80211_HT_DEBUG
792 printk(KERN_DEBUG "Could not find station: %s\n",
798 state = &sta->ampdu_mlme.tid_state_tx[tid];
799 spin_lock_bh(&sta->lock);
801 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
802 #ifdef CONFIG_MAC80211_HT_DEBUG
803 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
806 spin_unlock_bh(&sta->lock);
811 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
813 *state |= HT_ADDBA_DRV_READY_MSK;
815 if (*state == HT_AGG_STATE_OPERATIONAL) {
816 #ifdef CONFIG_MAC80211_HT_DEBUG
817 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
819 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
821 spin_unlock_bh(&sta->lock);
824 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
826 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
828 struct ieee80211_local *local = hw_to_local(hw);
829 struct sta_info *sta;
832 DECLARE_MAC_BUF(mac);
834 if (tid >= STA_TID_NUM) {
835 #ifdef CONFIG_MAC80211_HT_DEBUG
836 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
842 #ifdef CONFIG_MAC80211_HT_DEBUG
843 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
844 print_mac(mac, ra), tid);
845 #endif /* CONFIG_MAC80211_HT_DEBUG */
848 sta = sta_info_get(local, ra);
850 #ifdef CONFIG_MAC80211_HT_DEBUG
851 printk(KERN_DEBUG "Could not find station: %s\n",
857 state = &sta->ampdu_mlme.tid_state_tx[tid];
859 /* NOTE: no need to use sta->lock in this state check, as
860 * ieee80211_stop_tx_ba_session will let only
861 * one stop call to pass through per sta/tid */
862 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
863 #ifdef CONFIG_MAC80211_HT_DEBUG
864 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
870 if (*state & HT_AGG_STATE_INITIATOR_MSK)
871 ieee80211_send_delba(sta->sdata->dev, ra, tid,
872 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
874 agg_queue = sta->tid_to_tx_q[tid];
876 /* avoid ordering issues: we are the only one that can modify
877 * the content of the qdiscs */
878 spin_lock_bh(&local->mdev->queue_lock);
879 /* remove the queue for this aggregation */
880 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
881 spin_unlock_bh(&local->mdev->queue_lock);
883 /* we just requeued the all the frames that were in the removed
884 * queue, and since we might miss a softirq we do netif_schedule.
885 * ieee80211_wake_queue is not used here as this queue is not
886 * necessarily stopped */
887 netif_schedule(local->mdev);
888 spin_lock_bh(&sta->lock);
889 *state = HT_AGG_STATE_IDLE;
890 sta->ampdu_mlme.addba_req_num[tid] = 0;
891 kfree(sta->ampdu_mlme.tid_tx[tid]);
892 sta->ampdu_mlme.tid_tx[tid] = NULL;
893 spin_unlock_bh(&sta->lock);
897 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
899 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
900 const u8 *ra, u16 tid)
902 struct ieee80211_local *local = hw_to_local(hw);
903 struct ieee80211_ra_tid *ra_tid;
904 struct sk_buff *skb = dev_alloc_skb(0);
906 if (unlikely(!skb)) {
907 #ifdef CONFIG_MAC80211_HT_DEBUG
909 printk(KERN_WARNING "%s: Not enough memory, "
910 "dropping start BA session", skb->dev->name);
914 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
915 memcpy(&ra_tid->ra, ra, ETH_ALEN);
918 skb->pkt_type = IEEE80211_ADDBA_MSG;
919 skb_queue_tail(&local->skb_queue, skb);
920 tasklet_schedule(&local->tasklet);
922 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
924 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
925 const u8 *ra, u16 tid)
927 struct ieee80211_local *local = hw_to_local(hw);
928 struct ieee80211_ra_tid *ra_tid;
929 struct sk_buff *skb = dev_alloc_skb(0);
931 if (unlikely(!skb)) {
932 #ifdef CONFIG_MAC80211_HT_DEBUG
934 printk(KERN_WARNING "%s: Not enough memory, "
935 "dropping stop BA session", skb->dev->name);
939 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
940 memcpy(&ra_tid->ra, ra, ETH_ALEN);
943 skb->pkt_type = IEEE80211_DELBA_MSG;
944 skb_queue_tail(&local->skb_queue, skb);
945 tasklet_schedule(&local->tasklet);
947 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
949 static void ieee80211_set_multicast_list(struct net_device *dev)
951 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
952 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
953 int allmulti, promisc, sdata_allmulti, sdata_promisc;
955 allmulti = !!(dev->flags & IFF_ALLMULTI);
956 promisc = !!(dev->flags & IFF_PROMISC);
957 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
958 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
960 if (allmulti != sdata_allmulti) {
961 if (dev->flags & IFF_ALLMULTI)
962 atomic_inc(&local->iff_allmultis);
964 atomic_dec(&local->iff_allmultis);
965 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
968 if (promisc != sdata_promisc) {
969 if (dev->flags & IFF_PROMISC)
970 atomic_inc(&local->iff_promiscs);
972 atomic_dec(&local->iff_promiscs);
973 sdata->flags ^= IEEE80211_SDATA_PROMISC;
976 dev_mc_sync(local->mdev, dev);
979 static const struct header_ops ieee80211_header_ops = {
980 .create = eth_header,
981 .parse = header_parse_80211,
982 .rebuild = eth_rebuild_header,
983 .cache = eth_header_cache,
984 .cache_update = eth_header_cache_update,
987 /* Must not be called for mdev */
988 void ieee80211_if_setup(struct net_device *dev)
991 dev->hard_start_xmit = ieee80211_subif_start_xmit;
992 dev->wireless_handlers = &ieee80211_iw_handler_def;
993 dev->set_multicast_list = ieee80211_set_multicast_list;
994 dev->change_mtu = ieee80211_change_mtu;
995 dev->open = ieee80211_open;
996 dev->stop = ieee80211_stop;
997 dev->destructor = ieee80211_if_free;
1000 /* everything else */
1002 static int __ieee80211_if_config(struct net_device *dev,
1003 struct sk_buff *beacon)
1005 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1006 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1007 struct ieee80211_if_conf conf;
1009 if (!local->ops->config_interface || !netif_running(dev))
1012 memset(&conf, 0, sizeof(conf));
1013 conf.type = sdata->vif.type;
1014 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1015 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1016 conf.bssid = sdata->u.sta.bssid;
1017 conf.ssid = sdata->u.sta.ssid;
1018 conf.ssid_len = sdata->u.sta.ssid_len;
1019 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1020 conf.beacon = beacon;
1021 ieee80211_start_mesh(dev);
1022 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1023 conf.ssid = sdata->u.ap.ssid;
1024 conf.ssid_len = sdata->u.ap.ssid_len;
1025 conf.beacon = beacon;
1027 return local->ops->config_interface(local_to_hw(local),
1028 &sdata->vif, &conf);
1031 int ieee80211_if_config(struct net_device *dev)
1033 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1034 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1035 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
1036 (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1037 return ieee80211_if_config_beacon(dev);
1038 return __ieee80211_if_config(dev, NULL);
1041 int ieee80211_if_config_beacon(struct net_device *dev)
1043 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1044 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1045 struct sk_buff *skb;
1047 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1049 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif);
1052 return __ieee80211_if_config(dev, skb);
1055 int ieee80211_hw_config(struct ieee80211_local *local)
1057 struct ieee80211_channel *chan;
1060 if (local->sta_sw_scanning)
1061 chan = local->scan_channel;
1063 chan = local->oper_channel;
1065 local->hw.conf.channel = chan;
1067 if (!local->hw.conf.power_level)
1068 local->hw.conf.power_level = chan->max_power;
1070 local->hw.conf.power_level = min(chan->max_power,
1071 local->hw.conf.power_level);
1073 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1075 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1076 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1077 wiphy_name(local->hw.wiphy), chan->center_freq);
1080 if (local->open_count)
1081 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1087 * ieee80211_handle_ht should be used only after legacy configuration
1088 * has been determined namely band, as ht configuration depends upon
1089 * the hardware's HT abilities for a _specific_ band.
1091 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1092 struct ieee80211_ht_info *req_ht_cap,
1093 struct ieee80211_ht_bss_info *req_bss_cap)
1095 struct ieee80211_conf *conf = &local->hw.conf;
1096 struct ieee80211_supported_band *sband;
1097 struct ieee80211_ht_info ht_conf;
1098 struct ieee80211_ht_bss_info ht_bss_conf;
1101 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1104 sband = local->hw.wiphy->bands[conf->channel->band];
1106 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1107 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1109 /* HT is not supported */
1110 if (!sband->ht_info.ht_supported) {
1111 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1117 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1118 changed |= BSS_CHANGED_HT;
1119 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1120 conf->ht_conf.ht_supported = 0;
1125 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1126 changed |= BSS_CHANGED_HT;
1128 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1129 ht_conf.ht_supported = 1;
1131 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1132 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1133 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1134 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1135 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1136 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1138 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1139 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1142 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1144 /* configure suppoerted Tx MCS according to requested MCS
1145 * (based in most cases on Rx capabilities of peer) and self
1146 * Tx MCS capabilities (as defined by low level driver HW
1147 * Tx capabilities) */
1148 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1151 /* Counting from 0 therfore + 1 */
1152 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1153 max_tx_streams = ((tx_mcs_set_cap &
1154 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1156 for (i = 0; i < max_tx_streams; i++)
1157 ht_conf.supp_mcs_set[i] =
1158 sband->ht_info.supp_mcs_set[i] &
1159 req_ht_cap->supp_mcs_set[i];
1161 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1162 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1163 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1164 ht_conf.supp_mcs_set[i] =
1165 sband->ht_info.supp_mcs_set[i] &
1166 req_ht_cap->supp_mcs_set[i];
1169 /* if bss configuration changed store the new one */
1170 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1171 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1172 changed |= BSS_CHANGED_HT;
1173 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1174 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1180 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1183 struct ieee80211_local *local = sdata->local;
1188 if (local->ops->bss_info_changed)
1189 local->ops->bss_info_changed(local_to_hw(local),
1195 u32 ieee80211_reset_erp_info(struct net_device *dev)
1197 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1199 sdata->bss_conf.use_cts_prot = 0;
1200 sdata->bss_conf.use_short_preamble = 0;
1201 return BSS_CHANGED_ERP_CTS_PROT | 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);
1408 struct ieee80211_tx_status_rtap_hdr *rthdr;
1409 struct ieee80211_sub_if_data *sdata;
1410 struct net_device *prev_dev = NULL;
1411 struct sta_info *sta;
1415 if (info->status.excessive_retries) {
1416 sta = sta_info_get(local, hdr->addr1);
1418 if (test_sta_flags(sta, WLAN_STA_PS)) {
1420 * The STA is in power save mode, so assume
1421 * that this TX packet failed because of that.
1423 ieee80211_handle_filtered_frame(local, sta, skb);
1430 fc = hdr->frame_control;
1432 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1433 (ieee80211_is_data_qos(fc))) {
1436 sta = sta_info_get(local, hdr->addr1);
1438 qc = ieee80211_get_qos_ctl(hdr);
1440 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1441 & IEEE80211_SCTL_SEQ);
1442 ieee80211_send_bar(sta->sdata->dev, hdr->addr1,
1447 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1448 sta = sta_info_get(local, hdr->addr1);
1450 ieee80211_handle_filtered_frame(local, sta, skb);
1455 rate_control_tx_status(local->mdev, skb);
1459 ieee80211_led_tx(local, 0);
1462 * Fragments are passed to low-level drivers as separate skbs, so these
1463 * are actually fragments, not frames. Update frame counters only for
1464 * the first fragment of the frame. */
1466 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1467 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1469 if (info->flags & IEEE80211_TX_STAT_ACK) {
1471 local->dot11TransmittedFrameCount++;
1472 if (is_multicast_ether_addr(hdr->addr1))
1473 local->dot11MulticastTransmittedFrameCount++;
1474 if (info->status.retry_count > 0)
1475 local->dot11RetryCount++;
1476 if (info->status.retry_count > 1)
1477 local->dot11MultipleRetryCount++;
1480 /* This counter shall be incremented for an acknowledged MPDU
1481 * with an individual address in the address 1 field or an MPDU
1482 * with a multicast address in the address 1 field of type Data
1484 if (!is_multicast_ether_addr(hdr->addr1) ||
1485 type == IEEE80211_FTYPE_DATA ||
1486 type == IEEE80211_FTYPE_MGMT)
1487 local->dot11TransmittedFragmentCount++;
1490 local->dot11FailedCount++;
1493 /* this was a transmitted frame, but now we want to reuse it */
1497 * This is a bit racy but we can avoid a lot of work
1500 if (!local->monitors && !local->cooked_mntrs) {
1505 /* send frame to monitor interfaces now */
1507 if (skb_headroom(skb) < sizeof(*rthdr)) {
1508 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1513 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1514 skb_push(skb, sizeof(*rthdr));
1516 memset(rthdr, 0, sizeof(*rthdr));
1517 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1518 rthdr->hdr.it_present =
1519 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1520 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1522 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1523 !is_multicast_ether_addr(hdr->addr1))
1524 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1526 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1527 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1528 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1529 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1530 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1532 rthdr->data_retries = info->status.retry_count;
1534 /* XXX: is this sufficient for BPF? */
1535 skb_set_mac_header(skb, 0);
1536 skb->ip_summed = CHECKSUM_UNNECESSARY;
1537 skb->pkt_type = PACKET_OTHERHOST;
1538 skb->protocol = htons(ETH_P_802_2);
1539 memset(skb->cb, 0, sizeof(skb->cb));
1542 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1543 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1544 if (!netif_running(sdata->dev))
1548 skb2 = skb_clone(skb, GFP_ATOMIC);
1550 skb2->dev = prev_dev;
1555 prev_dev = sdata->dev;
1559 skb->dev = prev_dev;
1566 EXPORT_SYMBOL(ieee80211_tx_status);
1568 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1569 const struct ieee80211_ops *ops)
1571 struct ieee80211_local *local;
1573 struct wiphy *wiphy;
1575 /* Ensure 32-byte alignment of our private data and hw private data.
1576 * We use the wiphy priv data for both our ieee80211_local and for
1577 * the driver's private data
1579 * In memory it'll be like this:
1581 * +-------------------------+
1583 * +-------------------------+
1584 * | struct ieee80211_local |
1585 * +-------------------------+
1586 * | driver's private data |
1587 * +-------------------------+
1590 priv_size = ((sizeof(struct ieee80211_local) +
1591 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1594 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1599 wiphy->privid = mac80211_wiphy_privid;
1601 local = wiphy_priv(wiphy);
1602 local->hw.wiphy = wiphy;
1604 local->hw.priv = (char *)local +
1605 ((sizeof(struct ieee80211_local) +
1606 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1609 BUG_ON(!ops->start);
1611 BUG_ON(!ops->config);
1612 BUG_ON(!ops->add_interface);
1613 BUG_ON(!ops->remove_interface);
1614 BUG_ON(!ops->configure_filter);
1617 local->hw.queues = 1; /* default */
1619 local->bridge_packets = 1;
1621 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1622 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1623 local->short_retry_limit = 7;
1624 local->long_retry_limit = 4;
1625 local->hw.conf.radio_enabled = 1;
1627 INIT_LIST_HEAD(&local->interfaces);
1629 spin_lock_init(&local->key_lock);
1631 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1633 sta_info_init(local);
1635 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1636 (unsigned long)local);
1637 tasklet_disable(&local->tx_pending_tasklet);
1639 tasklet_init(&local->tasklet,
1640 ieee80211_tasklet_handler,
1641 (unsigned long) local);
1642 tasklet_disable(&local->tasklet);
1644 skb_queue_head_init(&local->skb_queue);
1645 skb_queue_head_init(&local->skb_queue_unreliable);
1647 return local_to_hw(local);
1649 EXPORT_SYMBOL(ieee80211_alloc_hw);
1651 int ieee80211_register_hw(struct ieee80211_hw *hw)
1653 struct ieee80211_local *local = hw_to_local(hw);
1656 enum ieee80211_band band;
1657 struct net_device *mdev;
1658 struct ieee80211_sub_if_data *sdata;
1661 * generic code guarantees at least one band,
1662 * set this very early because much code assumes
1663 * that hw.conf.channel is assigned
1665 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1666 struct ieee80211_supported_band *sband;
1668 sband = local->hw.wiphy->bands[band];
1670 /* init channel we're on */
1671 local->hw.conf.channel =
1672 local->oper_channel =
1673 local->scan_channel = &sband->channels[0];
1678 result = wiphy_register(local->hw.wiphy);
1683 * We use the number of queues for feature tests (QoS, HT) internally
1684 * so restrict them appropriately.
1686 #ifdef CONFIG_MAC80211_QOS
1687 if (hw->queues > IEEE80211_MAX_QUEUES)
1688 hw->queues = IEEE80211_MAX_QUEUES;
1689 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1690 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1692 hw->ampdu_queues = 0;
1695 hw->ampdu_queues = 0;
1698 /* for now, mdev needs sub_if_data :/ */
1699 mdev = alloc_netdev_mq(sizeof(struct ieee80211_sub_if_data),
1700 "wmaster%d", ether_setup,
1701 ieee80211_num_queues(hw));
1703 goto fail_mdev_alloc;
1705 if (ieee80211_num_queues(hw) > 1)
1706 mdev->features |= NETIF_F_MULTI_QUEUE;
1708 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1709 mdev->ieee80211_ptr = &sdata->wdev;
1710 sdata->wdev.wiphy = local->hw.wiphy;
1714 ieee80211_rx_bss_list_init(mdev);
1716 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1717 mdev->open = ieee80211_master_open;
1718 mdev->stop = ieee80211_master_stop;
1719 mdev->type = ARPHRD_IEEE80211;
1720 mdev->header_ops = &ieee80211_header_ops;
1721 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1723 sdata->vif.type = IEEE80211_IF_TYPE_AP;
1725 sdata->local = local;
1726 sdata->u.ap.force_unicast_rateidx = -1;
1727 sdata->u.ap.max_ratectrl_rateidx = -1;
1728 ieee80211_if_sdata_init(sdata);
1730 /* no RCU needed since we're still during init phase */
1731 list_add_tail(&sdata->list, &local->interfaces);
1733 name = wiphy_dev(local->hw.wiphy)->driver->name;
1734 local->hw.workqueue = create_freezeable_workqueue(name);
1735 if (!local->hw.workqueue) {
1737 goto fail_workqueue;
1741 * The hardware needs headroom for sending the frame,
1742 * and we need some headroom for passing the frame to monitor
1743 * interfaces, but never both at the same time.
1745 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1746 sizeof(struct ieee80211_tx_status_rtap_hdr));
1748 debugfs_hw_add(local);
1750 if (local->hw.conf.beacon_int < 10)
1751 local->hw.conf.beacon_int = 100;
1753 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1754 IEEE80211_HW_SIGNAL_DB |
1755 IEEE80211_HW_SIGNAL_DBM) ?
1756 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1757 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1758 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1759 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1760 local->wstats_flags |= IW_QUAL_DBM;
1762 result = sta_info_start(local);
1767 result = dev_alloc_name(local->mdev, local->mdev->name);
1771 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1772 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1774 result = register_netdevice(local->mdev);
1778 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1779 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1781 result = ieee80211_init_rate_ctrl_alg(local,
1782 hw->rate_control_algorithm);
1784 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1785 "algorithm\n", wiphy_name(local->hw.wiphy));
1789 result = ieee80211_wep_init(local);
1792 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1793 wiphy_name(local->hw.wiphy));
1797 ieee80211_install_qdisc(local->mdev);
1799 /* add one default STA interface */
1800 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1801 IEEE80211_IF_TYPE_STA, NULL);
1803 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1804 wiphy_name(local->hw.wiphy));
1806 local->reg_state = IEEE80211_DEV_REGISTERED;
1809 ieee80211_led_init(local);
1814 rate_control_deinitialize(local);
1816 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1817 unregister_netdevice(local->mdev);
1821 sta_info_stop(local);
1823 debugfs_hw_del(local);
1824 destroy_workqueue(local->hw.workqueue);
1826 if (local->mdev != NULL) {
1827 ieee80211_if_free(local->mdev);
1831 wiphy_unregister(local->hw.wiphy);
1834 EXPORT_SYMBOL(ieee80211_register_hw);
1836 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1838 struct ieee80211_local *local = hw_to_local(hw);
1839 struct ieee80211_sub_if_data *sdata, *tmp;
1841 tasklet_kill(&local->tx_pending_tasklet);
1842 tasklet_kill(&local->tasklet);
1846 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1848 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1851 * At this point, interface list manipulations are fine
1852 * because the driver cannot be handing us frames any
1853 * more and the tasklet is killed.
1857 * First, we remove all non-master interfaces. Do this because they
1858 * may have bss pointer dependency on the master, and when we free
1859 * the master these would be freed as well, breaking our list
1860 * iteration completely.
1862 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1863 if (sdata->dev == local->mdev)
1865 list_del(&sdata->list);
1866 __ieee80211_if_del(local, sdata);
1869 /* then, finally, remove the master interface */
1870 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1874 ieee80211_rx_bss_list_deinit(local->mdev);
1875 ieee80211_clear_tx_pending(local);
1876 sta_info_stop(local);
1877 rate_control_deinitialize(local);
1878 debugfs_hw_del(local);
1880 if (skb_queue_len(&local->skb_queue)
1881 || skb_queue_len(&local->skb_queue_unreliable))
1882 printk(KERN_WARNING "%s: skb_queue not empty\n",
1883 wiphy_name(local->hw.wiphy));
1884 skb_queue_purge(&local->skb_queue);
1885 skb_queue_purge(&local->skb_queue_unreliable);
1887 destroy_workqueue(local->hw.workqueue);
1888 wiphy_unregister(local->hw.wiphy);
1889 ieee80211_wep_free(local);
1890 ieee80211_led_exit(local);
1891 ieee80211_if_free(local->mdev);
1894 EXPORT_SYMBOL(ieee80211_unregister_hw);
1896 void ieee80211_free_hw(struct ieee80211_hw *hw)
1898 struct ieee80211_local *local = hw_to_local(hw);
1900 wiphy_free(local->hw.wiphy);
1902 EXPORT_SYMBOL(ieee80211_free_hw);
1904 static int __init ieee80211_init(void)
1906 struct sk_buff *skb;
1909 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1910 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1911 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1913 ret = rc80211_pid_init();
1917 ret = ieee80211_wme_register();
1919 printk(KERN_DEBUG "ieee80211_init: failed to "
1920 "initialize WME (err=%d)\n", ret);
1921 goto out_cleanup_pid;
1924 ieee80211_debugfs_netdev_init();
1934 static void __exit ieee80211_exit(void)
1939 * For key todo, it'll be empty by now but the work
1940 * might still be scheduled.
1942 flush_scheduled_work();
1947 ieee80211_wme_unregister();
1948 ieee80211_debugfs_netdev_exit();
1952 subsys_initcall(ieee80211_init);
1953 module_exit(ieee80211_exit);
1955 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1956 MODULE_LICENSE("GPL");