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13#include <linux/slab.h>
14#include <linux/kernel.h>
15#include <linux/if_arp.h>
16#include <linux/netdevice.h>
17#include <linux/rtnetlink.h>
18#include <net/mac80211.h>
19#include <net/ieee80211_radiotap.h>
20#include "ieee80211_i.h"
21#include "sta_info.h"
22#include "debugfs_netdev.h"
23#include "mesh.h"
24#include "led.h"
25#include "driver-ops.h"
26#include "wme.h"
27#include "rate.h"
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
47{
48 int meshhdrlen;
49 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
50
51 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
52
53
54
55 if (new_mtu < 256 ||
56 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
57 return -EINVAL;
58 }
59
60#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
61 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
62#endif
63 dev->mtu = new_mtu;
64 return 0;
65}
66
67static int ieee80211_change_mac(struct net_device *dev, void *addr)
68{
69 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
70 struct sockaddr *sa = addr;
71 int ret;
72
73 if (ieee80211_sdata_running(sdata))
74 return -EBUSY;
75
76 ret = eth_mac_addr(dev, sa);
77
78 if (ret == 0)
79 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
80
81 return ret;
82}
83
84static inline int identical_mac_addr_allowed(int type1, int type2)
85{
86 return type1 == NL80211_IFTYPE_MONITOR ||
87 type2 == NL80211_IFTYPE_MONITOR ||
88 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
89 (type1 == NL80211_IFTYPE_WDS &&
90 (type2 == NL80211_IFTYPE_WDS ||
91 type2 == NL80211_IFTYPE_AP)) ||
92 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
93 (type1 == NL80211_IFTYPE_AP_VLAN &&
94 (type2 == NL80211_IFTYPE_AP ||
95 type2 == NL80211_IFTYPE_AP_VLAN));
96}
97
98static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
99 enum nl80211_iftype iftype)
100{
101 struct ieee80211_local *local = sdata->local;
102 struct ieee80211_sub_if_data *nsdata;
103 struct net_device *dev = sdata->dev;
104
105 ASSERT_RTNL();
106
107
108 list_for_each_entry(nsdata, &local->interfaces, list) {
109 struct net_device *ndev = nsdata->dev;
110
111 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
112
113
114
115
116
117
118
119
120
121
122 if (iftype == NL80211_IFTYPE_ADHOC &&
123 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
124 return -EBUSY;
125
126
127
128
129
130 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
131 continue;
132
133
134
135
136 if (!identical_mac_addr_allowed(iftype,
137 nsdata->vif.type))
138 return -ENOTUNIQ;
139
140
141
142
143 if (iftype == NL80211_IFTYPE_AP_VLAN &&
144 nsdata->vif.type == NL80211_IFTYPE_AP)
145 sdata->bss = &nsdata->u.ap;
146 }
147 }
148
149 return 0;
150}
151
152void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
153 const int offset)
154{
155 struct ieee80211_local *local = sdata->local;
156 u32 flags = sdata->u.mntr_flags;
157
158#define ADJUST(_f, _s) do { \
159 if (flags & MONITOR_FLAG_##_f) \
160 local->fif_##_s += offset; \
161 } while (0)
162
163 ADJUST(FCSFAIL, fcsfail);
164 ADJUST(PLCPFAIL, plcpfail);
165 ADJUST(CONTROL, control);
166 ADJUST(CONTROL, pspoll);
167 ADJUST(OTHER_BSS, other_bss);
168
169#undef ADJUST
170}
171
172
173
174
175
176
177static int ieee80211_do_open(struct net_device *dev, bool coming_up)
178{
179 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
180 struct ieee80211_local *local = sdata->local;
181 struct sta_info *sta;
182 u32 changed = 0;
183 int res;
184 u32 hw_reconf_flags = 0;
185
186 switch (sdata->vif.type) {
187 case NL80211_IFTYPE_WDS:
188 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
189 return -ENOLINK;
190 break;
191 case NL80211_IFTYPE_AP_VLAN:
192 if (!sdata->bss)
193 return -ENOLINK;
194 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
195 break;
196 case NL80211_IFTYPE_AP:
197 sdata->bss = &sdata->u.ap;
198 break;
199 case NL80211_IFTYPE_MESH_POINT:
200 case NL80211_IFTYPE_STATION:
201 case NL80211_IFTYPE_MONITOR:
202 case NL80211_IFTYPE_ADHOC:
203
204 break;
205 case NL80211_IFTYPE_UNSPECIFIED:
206 case NUM_NL80211_IFTYPES:
207 case NL80211_IFTYPE_P2P_CLIENT:
208 case NL80211_IFTYPE_P2P_GO:
209
210 WARN_ON(1);
211 break;
212 }
213
214 if (local->open_count == 0) {
215 res = drv_start(local);
216 if (res)
217 goto err_del_bss;
218 if (local->ops->napi_poll)
219 napi_enable(&local->napi);
220
221 hw_reconf_flags = ~0;
222 ieee80211_led_radio(local, true);
223 ieee80211_mod_tpt_led_trig(local,
224 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
225 }
226
227
228
229
230
231 if (is_zero_ether_addr(dev->dev_addr)) {
232 memcpy(dev->dev_addr,
233 local->hw.wiphy->perm_addr,
234 ETH_ALEN);
235 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
236
237 if (!is_valid_ether_addr(dev->dev_addr)) {
238 if (!local->open_count)
239 drv_stop(local);
240 return -EADDRNOTAVAIL;
241 }
242 }
243
244 switch (sdata->vif.type) {
245 case NL80211_IFTYPE_AP_VLAN:
246
247 break;
248 case NL80211_IFTYPE_MONITOR:
249 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
250 local->cooked_mntrs++;
251 break;
252 }
253
254
255 local->monitors++;
256 if (local->monitors == 1) {
257 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
258 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
259 }
260
261 ieee80211_adjust_monitor_flags(sdata, 1);
262 ieee80211_configure_filter(local);
263
264 netif_carrier_on(dev);
265 break;
266 default:
267 if (coming_up) {
268 res = drv_add_interface(local, &sdata->vif);
269 if (res)
270 goto err_stop;
271 }
272
273 if (sdata->vif.type == NL80211_IFTYPE_AP) {
274 local->fif_pspoll++;
275 local->fif_probe_req++;
276
277 ieee80211_configure_filter(local);
278 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
279 local->fif_probe_req++;
280 }
281
282 changed |= ieee80211_reset_erp_info(sdata);
283 ieee80211_bss_info_change_notify(sdata, changed);
284
285 if (sdata->vif.type == NL80211_IFTYPE_STATION)
286 netif_carrier_off(dev);
287 else
288 netif_carrier_on(dev);
289 }
290
291 set_bit(SDATA_STATE_RUNNING, &sdata->state);
292
293 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
294
295 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
296 GFP_KERNEL);
297 if (!sta) {
298 res = -ENOMEM;
299 goto err_del_interface;
300 }
301
302
303 sta->flags |= WLAN_STA_AUTHORIZED;
304
305 res = sta_info_insert(sta);
306 if (res) {
307
308 goto err_del_interface;
309 }
310
311 rate_control_rate_init(sta);
312 }
313
314
315
316
317
318
319 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
320 atomic_inc(&local->iff_allmultis);
321
322 if (sdata->flags & IEEE80211_SDATA_PROMISC)
323 atomic_inc(&local->iff_promiscs);
324
325 mutex_lock(&local->mtx);
326 hw_reconf_flags |= __ieee80211_recalc_idle(local);
327 mutex_unlock(&local->mtx);
328
329 if (coming_up)
330 local->open_count++;
331
332 if (hw_reconf_flags) {
333 ieee80211_hw_config(local, hw_reconf_flags);
334
335
336
337
338
339 ieee80211_set_wmm_default(sdata);
340 }
341
342 ieee80211_recalc_ps(local, -1);
343
344 netif_tx_start_all_queues(dev);
345
346 return 0;
347 err_del_interface:
348 drv_remove_interface(local, &sdata->vif);
349 err_stop:
350 if (!local->open_count)
351 drv_stop(local);
352 err_del_bss:
353 sdata->bss = NULL;
354 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
355 list_del(&sdata->u.vlan.list);
356 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
357 return res;
358}
359
360static int ieee80211_open(struct net_device *dev)
361{
362 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
363 int err;
364
365
366 if (!is_zero_ether_addr(dev->dev_addr) &&
367 !is_valid_ether_addr(dev->dev_addr))
368 return -EADDRNOTAVAIL;
369
370 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
371 if (err)
372 return err;
373
374 return ieee80211_do_open(dev, true);
375}
376
377static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
378 bool going_down)
379{
380 struct ieee80211_local *local = sdata->local;
381 unsigned long flags;
382 struct sk_buff *skb, *tmp;
383 u32 hw_reconf_flags = 0;
384 int i;
385
386 if (local->scan_sdata == sdata)
387 ieee80211_scan_cancel(local);
388
389 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
390
391
392
393
394 netif_tx_stop_all_queues(sdata->dev);
395
396
397
398
399 ieee80211_work_purge(sdata);
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415 sta_info_flush(local, sdata);
416
417
418
419
420
421
422
423 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
424 atomic_dec(&local->iff_allmultis);
425
426 if (sdata->flags & IEEE80211_SDATA_PROMISC)
427 atomic_dec(&local->iff_promiscs);
428
429 if (sdata->vif.type == NL80211_IFTYPE_AP) {
430 local->fif_pspoll--;
431 local->fif_probe_req--;
432 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
433 local->fif_probe_req--;
434 }
435
436 netif_addr_lock_bh(sdata->dev);
437 spin_lock_bh(&local->filter_lock);
438 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
439 sdata->dev->addr_len);
440 spin_unlock_bh(&local->filter_lock);
441 netif_addr_unlock_bh(sdata->dev);
442
443 ieee80211_configure_filter(local);
444
445 del_timer_sync(&local->dynamic_ps_timer);
446 cancel_work_sync(&local->dynamic_ps_enable_work);
447
448
449 if (sdata->vif.type == NL80211_IFTYPE_AP) {
450 struct ieee80211_sub_if_data *vlan, *tmpsdata;
451 struct beacon_data *old_beacon = sdata->u.ap.beacon;
452
453
454 ieee80211_bss_info_change_notify(sdata,
455 BSS_CHANGED_BEACON_ENABLED);
456
457
458 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
459 synchronize_rcu();
460 kfree(old_beacon);
461
462
463 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
464 local->total_ps_buffered--;
465 dev_kfree_skb(skb);
466 }
467
468
469 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
470 u.vlan.list)
471 dev_close(vlan->dev);
472 WARN_ON(!list_empty(&sdata->u.ap.vlans));
473 }
474
475 if (going_down)
476 local->open_count--;
477
478 switch (sdata->vif.type) {
479 case NL80211_IFTYPE_AP_VLAN:
480 list_del(&sdata->u.vlan.list);
481
482 break;
483 case NL80211_IFTYPE_MONITOR:
484 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
485 local->cooked_mntrs--;
486 break;
487 }
488
489 local->monitors--;
490 if (local->monitors == 0) {
491 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
492 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
493 }
494
495 ieee80211_adjust_monitor_flags(sdata, -1);
496 ieee80211_configure_filter(local);
497 break;
498 default:
499 flush_work(&sdata->work);
500
501
502
503
504
505
506 synchronize_rcu();
507 skb_queue_purge(&sdata->skb_queue);
508
509
510
511
512
513 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
514 ieee80211_bss_info_change_notify(sdata,
515 BSS_CHANGED_BEACON_ENABLED);
516
517
518
519
520
521 ieee80211_free_keys(sdata);
522
523 if (going_down)
524 drv_remove_interface(local, &sdata->vif);
525 }
526
527 sdata->bss = NULL;
528
529 mutex_lock(&local->mtx);
530 hw_reconf_flags |= __ieee80211_recalc_idle(local);
531 mutex_unlock(&local->mtx);
532
533 ieee80211_recalc_ps(local, -1);
534
535 if (local->open_count == 0) {
536 if (local->ops->napi_poll)
537 napi_disable(&local->napi);
538 ieee80211_clear_tx_pending(local);
539 ieee80211_stop_device(local);
540
541
542 hw_reconf_flags = 0;
543 }
544
545
546 if (hw_reconf_flags)
547 ieee80211_hw_config(local, hw_reconf_flags);
548
549 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
550 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
551 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
552 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
553 if (info->control.vif == &sdata->vif) {
554 __skb_unlink(skb, &local->pending[i]);
555 dev_kfree_skb_irq(skb);
556 }
557 }
558 }
559 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
560}
561
562static int ieee80211_stop(struct net_device *dev)
563{
564 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
565
566 ieee80211_do_stop(sdata, true);
567
568 return 0;
569}
570
571static void ieee80211_set_multicast_list(struct net_device *dev)
572{
573 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
574 struct ieee80211_local *local = sdata->local;
575 int allmulti, promisc, sdata_allmulti, sdata_promisc;
576
577 allmulti = !!(dev->flags & IFF_ALLMULTI);
578 promisc = !!(dev->flags & IFF_PROMISC);
579 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
580 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
581
582 if (allmulti != sdata_allmulti) {
583 if (dev->flags & IFF_ALLMULTI)
584 atomic_inc(&local->iff_allmultis);
585 else
586 atomic_dec(&local->iff_allmultis);
587 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
588 }
589
590 if (promisc != sdata_promisc) {
591 if (dev->flags & IFF_PROMISC)
592 atomic_inc(&local->iff_promiscs);
593 else
594 atomic_dec(&local->iff_promiscs);
595 sdata->flags ^= IEEE80211_SDATA_PROMISC;
596 }
597 spin_lock_bh(&local->filter_lock);
598 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
599 spin_unlock_bh(&local->filter_lock);
600 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
601}
602
603
604
605
606
607static void ieee80211_teardown_sdata(struct net_device *dev)
608{
609 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
610 struct ieee80211_local *local = sdata->local;
611 int flushed;
612 int i;
613
614
615 ieee80211_free_keys(sdata);
616
617 ieee80211_debugfs_remove_netdev(sdata);
618
619 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
620 __skb_queue_purge(&sdata->fragments[i].skb_list);
621 sdata->fragment_next = 0;
622
623 if (ieee80211_vif_is_mesh(&sdata->vif))
624 mesh_rmc_free(sdata);
625
626 flushed = sta_info_flush(local, sdata);
627 WARN_ON(flushed);
628}
629
630static u16 ieee80211_netdev_select_queue(struct net_device *dev,
631 struct sk_buff *skb)
632{
633 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
634}
635
636static const struct net_device_ops ieee80211_dataif_ops = {
637 .ndo_open = ieee80211_open,
638 .ndo_stop = ieee80211_stop,
639 .ndo_uninit = ieee80211_teardown_sdata,
640 .ndo_start_xmit = ieee80211_subif_start_xmit,
641 .ndo_set_multicast_list = ieee80211_set_multicast_list,
642 .ndo_change_mtu = ieee80211_change_mtu,
643 .ndo_set_mac_address = ieee80211_change_mac,
644 .ndo_select_queue = ieee80211_netdev_select_queue,
645};
646
647static u16 ieee80211_monitor_select_queue(struct net_device *dev,
648 struct sk_buff *skb)
649{
650 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
651 struct ieee80211_local *local = sdata->local;
652 struct ieee80211_hdr *hdr;
653 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
654 u8 *p;
655
656 if (local->hw.queues < 4)
657 return 0;
658
659 if (skb->len < 4 ||
660 skb->len < le16_to_cpu(rtap->it_len) + 2 )
661 return 0;
662
663 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
664
665 if (!ieee80211_is_data(hdr->frame_control)) {
666 skb->priority = 7;
667 return ieee802_1d_to_ac[skb->priority];
668 }
669 if (!ieee80211_is_data_qos(hdr->frame_control)) {
670 skb->priority = 0;
671 return ieee802_1d_to_ac[skb->priority];
672 }
673
674 p = ieee80211_get_qos_ctl(hdr);
675 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
676
677 return ieee80211_downgrade_queue(local, skb);
678}
679
680static const struct net_device_ops ieee80211_monitorif_ops = {
681 .ndo_open = ieee80211_open,
682 .ndo_stop = ieee80211_stop,
683 .ndo_uninit = ieee80211_teardown_sdata,
684 .ndo_start_xmit = ieee80211_monitor_start_xmit,
685 .ndo_set_multicast_list = ieee80211_set_multicast_list,
686 .ndo_change_mtu = ieee80211_change_mtu,
687 .ndo_set_mac_address = eth_mac_addr,
688 .ndo_select_queue = ieee80211_monitor_select_queue,
689};
690
691static void ieee80211_if_setup(struct net_device *dev)
692{
693 ether_setup(dev);
694 dev->netdev_ops = &ieee80211_dataif_ops;
695 dev->destructor = free_netdev;
696}
697
698static void ieee80211_iface_work(struct work_struct *work)
699{
700 struct ieee80211_sub_if_data *sdata =
701 container_of(work, struct ieee80211_sub_if_data, work);
702 struct ieee80211_local *local = sdata->local;
703 struct sk_buff *skb;
704 struct sta_info *sta;
705 struct ieee80211_ra_tid *ra_tid;
706
707 if (!ieee80211_sdata_running(sdata))
708 return;
709
710 if (local->scanning)
711 return;
712
713
714
715
716
717 if (WARN(local->suspended,
718 "interface work scheduled while going to suspend\n"))
719 return;
720
721
722 while ((skb = skb_dequeue(&sdata->skb_queue))) {
723 struct ieee80211_mgmt *mgmt = (void *)skb->data;
724
725 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
726 ra_tid = (void *)&skb->cb;
727 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
728 ra_tid->tid);
729 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
730 ra_tid = (void *)&skb->cb;
731 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
732 ra_tid->tid);
733 } else if (ieee80211_is_action(mgmt->frame_control) &&
734 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
735 int len = skb->len;
736
737 mutex_lock(&local->sta_mtx);
738 sta = sta_info_get_bss(sdata, mgmt->sa);
739 if (sta) {
740 switch (mgmt->u.action.u.addba_req.action_code) {
741 case WLAN_ACTION_ADDBA_REQ:
742 ieee80211_process_addba_request(
743 local, sta, mgmt, len);
744 break;
745 case WLAN_ACTION_ADDBA_RESP:
746 ieee80211_process_addba_resp(local, sta,
747 mgmt, len);
748 break;
749 case WLAN_ACTION_DELBA:
750 ieee80211_process_delba(sdata, sta,
751 mgmt, len);
752 break;
753 default:
754 WARN_ON(1);
755 break;
756 }
757 }
758 mutex_unlock(&local->sta_mtx);
759 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
760 struct ieee80211_hdr *hdr = (void *)mgmt;
761
762
763
764
765
766
767
768
769 WARN_ON(hdr->frame_control &
770 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
771 WARN_ON(!(hdr->seq_ctrl &
772 cpu_to_le16(IEEE80211_SCTL_FRAG)));
773
774
775
776
777
778 mutex_lock(&local->sta_mtx);
779 sta = sta_info_get_bss(sdata, mgmt->sa);
780 if (sta) {
781 u16 tid = *ieee80211_get_qos_ctl(hdr) &
782 IEEE80211_QOS_CTL_TID_MASK;
783
784 __ieee80211_stop_rx_ba_session(
785 sta, tid, WLAN_BACK_RECIPIENT,
786 WLAN_REASON_QSTA_REQUIRE_SETUP,
787 true);
788 }
789 mutex_unlock(&local->sta_mtx);
790 } else switch (sdata->vif.type) {
791 case NL80211_IFTYPE_STATION:
792 ieee80211_sta_rx_queued_mgmt(sdata, skb);
793 break;
794 case NL80211_IFTYPE_ADHOC:
795 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
796 break;
797 case NL80211_IFTYPE_MESH_POINT:
798 if (!ieee80211_vif_is_mesh(&sdata->vif))
799 break;
800 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
801 break;
802 default:
803 WARN(1, "frame for unexpected interface type");
804 break;
805 }
806
807 kfree_skb(skb);
808 }
809
810
811 switch (sdata->vif.type) {
812 case NL80211_IFTYPE_STATION:
813 ieee80211_sta_work(sdata);
814 break;
815 case NL80211_IFTYPE_ADHOC:
816 ieee80211_ibss_work(sdata);
817 break;
818 case NL80211_IFTYPE_MESH_POINT:
819 if (!ieee80211_vif_is_mesh(&sdata->vif))
820 break;
821 ieee80211_mesh_work(sdata);
822 break;
823 default:
824 break;
825 }
826}
827
828
829
830
831
832static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
833 enum nl80211_iftype type)
834{
835
836 memset(&sdata->u, 0, sizeof(sdata->u));
837
838
839 sdata->vif.type = type;
840 sdata->vif.p2p = false;
841 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
842 sdata->wdev.iftype = type;
843
844 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
845 sdata->control_port_no_encrypt = false;
846
847
848 sdata->dev->type = ARPHRD_ETHER;
849
850 skb_queue_head_init(&sdata->skb_queue);
851 INIT_WORK(&sdata->work, ieee80211_iface_work);
852
853 switch (type) {
854 case NL80211_IFTYPE_P2P_GO:
855 type = NL80211_IFTYPE_AP;
856 sdata->vif.type = type;
857 sdata->vif.p2p = true;
858
859 case NL80211_IFTYPE_AP:
860 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
861 INIT_LIST_HEAD(&sdata->u.ap.vlans);
862 break;
863 case NL80211_IFTYPE_P2P_CLIENT:
864 type = NL80211_IFTYPE_STATION;
865 sdata->vif.type = type;
866 sdata->vif.p2p = true;
867
868 case NL80211_IFTYPE_STATION:
869 ieee80211_sta_setup_sdata(sdata);
870 break;
871 case NL80211_IFTYPE_ADHOC:
872 ieee80211_ibss_setup_sdata(sdata);
873 break;
874 case NL80211_IFTYPE_MESH_POINT:
875 if (ieee80211_vif_is_mesh(&sdata->vif))
876 ieee80211_mesh_init_sdata(sdata);
877 break;
878 case NL80211_IFTYPE_MONITOR:
879 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
880 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
881 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
882 MONITOR_FLAG_OTHER_BSS;
883 break;
884 case NL80211_IFTYPE_WDS:
885 case NL80211_IFTYPE_AP_VLAN:
886 break;
887 case NL80211_IFTYPE_UNSPECIFIED:
888 case NUM_NL80211_IFTYPES:
889 BUG();
890 break;
891 }
892
893 ieee80211_debugfs_add_netdev(sdata);
894}
895
896static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
897 enum nl80211_iftype type)
898{
899 struct ieee80211_local *local = sdata->local;
900 int ret, err;
901 enum nl80211_iftype internal_type = type;
902 bool p2p = false;
903
904 ASSERT_RTNL();
905
906 if (!local->ops->change_interface)
907 return -EBUSY;
908
909 switch (sdata->vif.type) {
910 case NL80211_IFTYPE_AP:
911 case NL80211_IFTYPE_STATION:
912 case NL80211_IFTYPE_ADHOC:
913
914
915
916
917
918
919 break;
920 default:
921 return -EBUSY;
922 }
923
924 switch (type) {
925 case NL80211_IFTYPE_AP:
926 case NL80211_IFTYPE_STATION:
927 case NL80211_IFTYPE_ADHOC:
928
929
930
931
932
933
934 break;
935 case NL80211_IFTYPE_P2P_CLIENT:
936 p2p = true;
937 internal_type = NL80211_IFTYPE_STATION;
938 break;
939 case NL80211_IFTYPE_P2P_GO:
940 p2p = true;
941 internal_type = NL80211_IFTYPE_AP;
942 break;
943 default:
944 return -EBUSY;
945 }
946
947 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
948 if (ret)
949 return ret;
950
951 ieee80211_do_stop(sdata, false);
952
953 ieee80211_teardown_sdata(sdata->dev);
954
955 ret = drv_change_interface(local, sdata, internal_type, p2p);
956 if (ret)
957 type = sdata->vif.type;
958
959 ieee80211_setup_sdata(sdata, type);
960
961 err = ieee80211_do_open(sdata->dev, false);
962 WARN(err, "type change: do_open returned %d", err);
963
964 return ret;
965}
966
967int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
968 enum nl80211_iftype type)
969{
970 int ret;
971
972 ASSERT_RTNL();
973
974 if (type == ieee80211_vif_type_p2p(&sdata->vif))
975 return 0;
976
977
978 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
979 type == NL80211_IFTYPE_ADHOC)
980 return -EOPNOTSUPP;
981
982 if (ieee80211_sdata_running(sdata)) {
983 ret = ieee80211_runtime_change_iftype(sdata, type);
984 if (ret)
985 return ret;
986 } else {
987
988 ieee80211_teardown_sdata(sdata->dev);
989 ieee80211_setup_sdata(sdata, type);
990 }
991
992
993 sdata->vif.bss_conf.basic_rates =
994 ieee80211_mandatory_rates(sdata->local,
995 sdata->local->hw.conf.channel->band);
996 sdata->drop_unencrypted = 0;
997 if (type == NL80211_IFTYPE_STATION)
998 sdata->u.mgd.use_4addr = false;
999
1000 return 0;
1001}
1002
1003static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1004 struct net_device *dev,
1005 enum nl80211_iftype type)
1006{
1007 struct ieee80211_sub_if_data *sdata;
1008 u64 mask, start, addr, val, inc;
1009 u8 *m;
1010 u8 tmp_addr[ETH_ALEN];
1011 int i;
1012
1013
1014 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1015
1016 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1017 local->hw.wiphy->n_addresses <= 1)
1018 return;
1019
1020
1021 mutex_lock(&local->iflist_mtx);
1022
1023 switch (type) {
1024 case NL80211_IFTYPE_MONITOR:
1025
1026 break;
1027 case NL80211_IFTYPE_WDS:
1028 case NL80211_IFTYPE_AP_VLAN:
1029
1030 list_for_each_entry(sdata, &local->interfaces, list) {
1031 if (sdata->vif.type != NL80211_IFTYPE_AP)
1032 continue;
1033 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1034 break;
1035 }
1036
1037 break;
1038 default:
1039
1040 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1041 bool used = false;
1042
1043 list_for_each_entry(sdata, &local->interfaces, list) {
1044 if (memcmp(local->hw.wiphy->addresses[i].addr,
1045 sdata->vif.addr, ETH_ALEN) == 0) {
1046 used = true;
1047 break;
1048 }
1049 }
1050
1051 if (!used) {
1052 memcpy(dev->perm_addr,
1053 local->hw.wiphy->addresses[i].addr,
1054 ETH_ALEN);
1055 break;
1056 }
1057 }
1058
1059
1060 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1061 break;
1062
1063 m = local->hw.wiphy->addr_mask;
1064 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1065 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1066 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1067
1068 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1069
1070 printk(KERN_DEBUG "not contiguous\n");
1071 break;
1072 }
1073
1074 m = local->hw.wiphy->perm_addr;
1075 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1076 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1077 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1078
1079 inc = 1ULL<<__ffs64(mask);
1080 val = (start & mask);
1081 addr = (start & ~mask) | (val & mask);
1082 do {
1083 bool used = false;
1084
1085 tmp_addr[5] = addr >> 0*8;
1086 tmp_addr[4] = addr >> 1*8;
1087 tmp_addr[3] = addr >> 2*8;
1088 tmp_addr[2] = addr >> 3*8;
1089 tmp_addr[1] = addr >> 4*8;
1090 tmp_addr[0] = addr >> 5*8;
1091
1092 val += inc;
1093
1094 list_for_each_entry(sdata, &local->interfaces, list) {
1095 if (memcmp(tmp_addr, sdata->vif.addr,
1096 ETH_ALEN) == 0) {
1097 used = true;
1098 break;
1099 }
1100 }
1101
1102 if (!used) {
1103 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1104 break;
1105 }
1106 addr = (start & ~mask) | (val & mask);
1107 } while (addr != start);
1108
1109 break;
1110 }
1111
1112 mutex_unlock(&local->iflist_mtx);
1113}
1114
1115int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1116 struct net_device **new_dev, enum nl80211_iftype type,
1117 struct vif_params *params)
1118{
1119 struct net_device *ndev;
1120 struct ieee80211_sub_if_data *sdata = NULL;
1121 int ret, i;
1122
1123 ASSERT_RTNL();
1124
1125 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
1126 name, ieee80211_if_setup, local->hw.queues);
1127 if (!ndev)
1128 return -ENOMEM;
1129 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1130
1131 ndev->needed_headroom = local->tx_headroom +
1132 4*6
1133 + 2 + 2 + 2 + 2
1134 + 6
1135 + 8
1136 - ETH_HLEN
1137 + IEEE80211_ENCRYPT_HEADROOM;
1138 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1139
1140 ret = dev_alloc_name(ndev, ndev->name);
1141 if (ret < 0)
1142 goto fail;
1143
1144 ieee80211_assign_perm_addr(local, ndev, type);
1145 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1146 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1147
1148
1149 sdata = netdev_priv(ndev);
1150 ndev->ieee80211_ptr = &sdata->wdev;
1151 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1152 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1153
1154
1155 sdata->wdev.wiphy = local->hw.wiphy;
1156 sdata->local = local;
1157 sdata->dev = ndev;
1158#ifdef CONFIG_INET
1159 sdata->arp_filter_state = true;
1160#endif
1161
1162 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1163 skb_queue_head_init(&sdata->fragments[i].skb_list);
1164
1165 INIT_LIST_HEAD(&sdata->key_list);
1166
1167 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1168 struct ieee80211_supported_band *sband;
1169 sband = local->hw.wiphy->bands[i];
1170 sdata->rc_rateidx_mask[i] =
1171 sband ? (1 << sband->n_bitrates) - 1 : 0;
1172 }
1173
1174
1175 ieee80211_setup_sdata(sdata, type);
1176
1177 if (params) {
1178 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1179 if (type == NL80211_IFTYPE_STATION)
1180 sdata->u.mgd.use_4addr = params->use_4addr;
1181 }
1182
1183 ret = register_netdevice(ndev);
1184 if (ret)
1185 goto fail;
1186
1187 mutex_lock(&local->iflist_mtx);
1188 list_add_tail_rcu(&sdata->list, &local->interfaces);
1189 mutex_unlock(&local->iflist_mtx);
1190
1191 if (new_dev)
1192 *new_dev = ndev;
1193
1194 return 0;
1195
1196 fail:
1197 free_netdev(ndev);
1198 return ret;
1199}
1200
1201void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1202{
1203 ASSERT_RTNL();
1204
1205 mutex_lock(&sdata->local->iflist_mtx);
1206 list_del_rcu(&sdata->list);
1207 mutex_unlock(&sdata->local->iflist_mtx);
1208
1209 synchronize_rcu();
1210 unregister_netdevice(sdata->dev);
1211}
1212
1213
1214
1215
1216
1217void ieee80211_remove_interfaces(struct ieee80211_local *local)
1218{
1219 struct ieee80211_sub_if_data *sdata, *tmp;
1220 LIST_HEAD(unreg_list);
1221
1222 ASSERT_RTNL();
1223
1224 mutex_lock(&local->iflist_mtx);
1225 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1226 list_del(&sdata->list);
1227
1228 unregister_netdevice_queue(sdata->dev, &unreg_list);
1229 }
1230 mutex_unlock(&local->iflist_mtx);
1231 unregister_netdevice_many(&unreg_list);
1232 list_del(&unreg_list);
1233}
1234
1235static u32 ieee80211_idle_off(struct ieee80211_local *local,
1236 const char *reason)
1237{
1238 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1239 return 0;
1240
1241#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1242 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1243#endif
1244
1245 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1246 return IEEE80211_CONF_CHANGE_IDLE;
1247}
1248
1249static u32 ieee80211_idle_on(struct ieee80211_local *local)
1250{
1251 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1252 return 0;
1253
1254#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1255 wiphy_debug(local->hw.wiphy, "device now idle\n");
1256#endif
1257
1258 drv_flush(local, false);
1259
1260 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1261 return IEEE80211_CONF_CHANGE_IDLE;
1262}
1263
1264u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1265{
1266 struct ieee80211_sub_if_data *sdata;
1267 int count = 0;
1268 bool working = false, scanning = false, hw_roc = false;
1269 struct ieee80211_work *wk;
1270 unsigned int led_trig_start = 0, led_trig_stop = 0;
1271
1272#ifdef CONFIG_PROVE_LOCKING
1273 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1274 !lockdep_is_held(&local->iflist_mtx));
1275#endif
1276 lockdep_assert_held(&local->mtx);
1277
1278 list_for_each_entry(sdata, &local->interfaces, list) {
1279 if (!ieee80211_sdata_running(sdata)) {
1280 sdata->vif.bss_conf.idle = true;
1281 continue;
1282 }
1283
1284 sdata->old_idle = sdata->vif.bss_conf.idle;
1285
1286
1287 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1288 !sdata->u.mgd.associated) {
1289 sdata->vif.bss_conf.idle = true;
1290 continue;
1291 }
1292
1293 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1294 !sdata->u.ibss.ssid_len) {
1295 sdata->vif.bss_conf.idle = true;
1296 continue;
1297 }
1298
1299 count++;
1300 }
1301
1302 list_for_each_entry(wk, &local->work_list, list) {
1303 working = true;
1304 wk->sdata->vif.bss_conf.idle = false;
1305 }
1306
1307 if (local->scan_sdata) {
1308 scanning = true;
1309 local->scan_sdata->vif.bss_conf.idle = false;
1310 }
1311
1312 if (local->hw_roc_channel)
1313 hw_roc = true;
1314
1315 list_for_each_entry(sdata, &local->interfaces, list) {
1316 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1317 continue;
1318 if (!ieee80211_sdata_running(sdata))
1319 continue;
1320 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1321 }
1322
1323 if (working || scanning || hw_roc)
1324 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1325 else
1326 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1327
1328 if (count)
1329 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1330 else
1331 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1332
1333 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1334
1335 if (hw_roc)
1336 return ieee80211_idle_off(local, "hw remain-on-channel");
1337 if (working)
1338 return ieee80211_idle_off(local, "working");
1339 if (scanning)
1340 return ieee80211_idle_off(local, "scanning");
1341 if (!count)
1342 return ieee80211_idle_on(local);
1343 else
1344 return ieee80211_idle_off(local, "in use");
1345
1346 return 0;
1347}
1348
1349void ieee80211_recalc_idle(struct ieee80211_local *local)
1350{
1351 u32 chg;
1352
1353 mutex_lock(&local->iflist_mtx);
1354 chg = __ieee80211_recalc_idle(local);
1355 mutex_unlock(&local->iflist_mtx);
1356 if (chg)
1357 ieee80211_hw_config(local, chg);
1358}
1359
1360static int netdev_notify(struct notifier_block *nb,
1361 unsigned long state,
1362 void *ndev)
1363{
1364 struct net_device *dev = ndev;
1365 struct ieee80211_sub_if_data *sdata;
1366
1367 if (state != NETDEV_CHANGENAME)
1368 return 0;
1369
1370 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1371 return 0;
1372
1373 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1374 return 0;
1375
1376 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1377
1378 memcpy(sdata->name, dev->name, IFNAMSIZ);
1379
1380 ieee80211_debugfs_rename_netdev(sdata);
1381 return 0;
1382}
1383
1384static struct notifier_block mac80211_netdev_notifier = {
1385 .notifier_call = netdev_notify,
1386};
1387
1388int ieee80211_iface_init(void)
1389{
1390 return register_netdevice_notifier(&mac80211_netdev_notifier);
1391}
1392
1393void ieee80211_iface_exit(void)
1394{
1395 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1396}
1397