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13#include <linux/kernel.h>
14#include <linux/slab.h>
15#include <linux/skbuff.h>
16#include <linux/if_vlan.h>
17#include <linux/etherdevice.h>
18#include <linux/bitmap.h>
19#include <linux/rcupdate.h>
20#include <linux/export.h>
21#include <net/net_namespace.h>
22#include <net/ieee80211_radiotap.h>
23#include <net/cfg80211.h>
24#include <net/mac80211.h>
25#include <net/codel.h>
26#include <net/codel_impl.h>
27#include <asm/unaligned.h>
28#include <net/fq_impl.h>
29
30#include "ieee80211_i.h"
31#include "driver-ops.h"
32#include "led.h"
33#include "mesh.h"
34#include "wep.h"
35#include "wpa.h"
36#include "wme.h"
37#include "rate.h"
38
39
40
41static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
42 struct sk_buff *skb, int group_addr,
43 int next_frag_len)
44{
45 int rate, mrate, erp, dur, i, shift = 0;
46 struct ieee80211_rate *txrate;
47 struct ieee80211_local *local = tx->local;
48 struct ieee80211_supported_band *sband;
49 struct ieee80211_hdr *hdr;
50 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
51 struct ieee80211_chanctx_conf *chanctx_conf;
52 u32 rate_flags = 0;
53
54
55 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
56 return 0;
57
58 rcu_read_lock();
59 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
60 if (chanctx_conf) {
61 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
62 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
63 }
64 rcu_read_unlock();
65
66
67 if (WARN_ON_ONCE(tx->rate.idx < 0))
68 return 0;
69
70 sband = local->hw.wiphy->bands[info->band];
71 txrate = &sband->bitrates[tx->rate.idx];
72
73 erp = txrate->flags & IEEE80211_RATE_ERP_G;
74
75
76 if (sband->band == NL80211_BAND_S1GHZ)
77 return 0;
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96 hdr = (struct ieee80211_hdr *)skb->data;
97 if (ieee80211_is_ctl(hdr->frame_control)) {
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112 return 0;
113 }
114
115
116 if (0 )
117 return cpu_to_le16(32768);
118
119 if (group_addr)
120 return 0;
121
122
123
124
125
126
127
128
129
130
131
132 rate = -1;
133
134 mrate = sband->bitrates[0].bitrate;
135 for (i = 0; i < sband->n_bitrates; i++) {
136 struct ieee80211_rate *r = &sband->bitrates[i];
137
138 if (r->bitrate > txrate->bitrate)
139 break;
140
141 if ((rate_flags & r->flags) != rate_flags)
142 continue;
143
144 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
145 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
146
147 switch (sband->band) {
148 case NL80211_BAND_2GHZ: {
149 u32 flag;
150 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
151 flag = IEEE80211_RATE_MANDATORY_G;
152 else
153 flag = IEEE80211_RATE_MANDATORY_B;
154 if (r->flags & flag)
155 mrate = r->bitrate;
156 break;
157 }
158 case NL80211_BAND_5GHZ:
159 case NL80211_BAND_6GHZ:
160 if (r->flags & IEEE80211_RATE_MANDATORY_A)
161 mrate = r->bitrate;
162 break;
163 case NL80211_BAND_S1GHZ:
164 case NL80211_BAND_60GHZ:
165
166 case NUM_NL80211_BANDS:
167 WARN_ON(1);
168 break;
169 }
170 }
171 if (rate == -1) {
172
173
174 rate = DIV_ROUND_UP(mrate, 1 << shift);
175 }
176
177
178 if (ieee80211_is_data_qos(hdr->frame_control) &&
179 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
180 dur = 0;
181 else
182
183
184
185 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
186 tx->sdata->vif.bss_conf.use_short_preamble,
187 shift);
188
189 if (next_frag_len) {
190
191
192 dur *= 2;
193
194 dur += ieee80211_frame_duration(sband->band, next_frag_len,
195 txrate->bitrate, erp,
196 tx->sdata->vif.bss_conf.use_short_preamble,
197 shift);
198 }
199
200 return cpu_to_le16(dur);
201}
202
203
204static ieee80211_tx_result debug_noinline
205ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
206{
207 struct ieee80211_local *local = tx->local;
208 struct ieee80211_if_managed *ifmgd;
209 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
210
211
212 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
213 return TX_CONTINUE;
214
215
216 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
217 return TX_CONTINUE;
218
219
220 if (local->hw.conf.dynamic_ps_timeout <= 0)
221 return TX_CONTINUE;
222
223
224 if (local->scanning)
225 return TX_CONTINUE;
226
227 if (!local->ps_sdata)
228 return TX_CONTINUE;
229
230
231 if (local->quiescing)
232 return TX_CONTINUE;
233
234
235 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
236 return TX_CONTINUE;
237
238 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
239 return TX_CONTINUE;
240
241 ifmgd = &tx->sdata->u.mgd;
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
257 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
258 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
259 return TX_CONTINUE;
260
261 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
262 ieee80211_stop_queues_by_reason(&local->hw,
263 IEEE80211_MAX_QUEUE_MAP,
264 IEEE80211_QUEUE_STOP_REASON_PS,
265 false);
266 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
267 ieee80211_queue_work(&local->hw,
268 &local->dynamic_ps_disable_work);
269 }
270
271
272 if (!ifmgd->associated)
273 return TX_CONTINUE;
274
275 mod_timer(&local->dynamic_ps_timer, jiffies +
276 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
277
278 return TX_CONTINUE;
279}
280
281static ieee80211_tx_result debug_noinline
282ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
283{
284
285 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
286 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
287 bool assoc = false;
288
289 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
290 return TX_CONTINUE;
291
292 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
293 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
294 !ieee80211_is_probe_req(hdr->frame_control) &&
295 !ieee80211_is_any_nullfunc(hdr->frame_control))
296
297
298
299
300
301
302
303
304
305
306
307 return TX_DROP;
308
309 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
310 return TX_CONTINUE;
311
312 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
313 return TX_CONTINUE;
314
315 if (tx->sta)
316 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
317
318 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
319 if (unlikely(!assoc &&
320 ieee80211_is_data(hdr->frame_control))) {
321#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
322 sdata_info(tx->sdata,
323 "dropped data frame to not associated station %pM\n",
324 hdr->addr1);
325#endif
326 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
327 return TX_DROP;
328 }
329 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
330 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
331
332
333
334
335 return TX_DROP;
336 }
337
338 return TX_CONTINUE;
339}
340
341
342
343
344
345static void purge_old_ps_buffers(struct ieee80211_local *local)
346{
347 int total = 0, purged = 0;
348 struct sk_buff *skb;
349 struct ieee80211_sub_if_data *sdata;
350 struct sta_info *sta;
351
352 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
353 struct ps_data *ps;
354
355 if (sdata->vif.type == NL80211_IFTYPE_AP)
356 ps = &sdata->u.ap.ps;
357 else if (ieee80211_vif_is_mesh(&sdata->vif))
358 ps = &sdata->u.mesh.ps;
359 else
360 continue;
361
362 skb = skb_dequeue(&ps->bc_buf);
363 if (skb) {
364 purged++;
365 ieee80211_free_txskb(&local->hw, skb);
366 }
367 total += skb_queue_len(&ps->bc_buf);
368 }
369
370
371
372
373
374 list_for_each_entry_rcu(sta, &local->sta_list, list) {
375 int ac;
376
377 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
378 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
379 total += skb_queue_len(&sta->ps_tx_buf[ac]);
380 if (skb) {
381 purged++;
382 ieee80211_free_txskb(&local->hw, skb);
383 break;
384 }
385 }
386 }
387
388 local->total_ps_buffered = total;
389 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
390}
391
392static ieee80211_tx_result
393ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
394{
395 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
396 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
397 struct ps_data *ps;
398
399
400
401
402
403
404
405
406
407
408 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
409 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
410 if (!tx->sdata->bss)
411 return TX_CONTINUE;
412
413 ps = &tx->sdata->bss->ps;
414 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
415 ps = &tx->sdata->u.mesh.ps;
416 } else {
417 return TX_CONTINUE;
418 }
419
420
421
422 if (ieee80211_has_order(hdr->frame_control))
423 return TX_CONTINUE;
424
425 if (ieee80211_is_probe_req(hdr->frame_control))
426 return TX_CONTINUE;
427
428 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
429 info->hw_queue = tx->sdata->vif.cab_queue;
430
431
432 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
433 return TX_CONTINUE;
434
435 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
436
437
438 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
439 return TX_CONTINUE;
440
441
442 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
443 purge_old_ps_buffers(tx->local);
444
445 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
446 ps_dbg(tx->sdata,
447 "BC TX buffer full - dropping the oldest frame\n");
448 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
449 } else
450 tx->local->total_ps_buffered++;
451
452 skb_queue_tail(&ps->bc_buf, tx->skb);
453
454 return TX_QUEUED;
455}
456
457static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
458 struct sk_buff *skb)
459{
460 if (!ieee80211_is_mgmt(fc))
461 return 0;
462
463 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
464 return 0;
465
466 if (!ieee80211_is_robust_mgmt_frame(skb))
467 return 0;
468
469 return 1;
470}
471
472static ieee80211_tx_result
473ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
474{
475 struct sta_info *sta = tx->sta;
476 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
477 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
478 struct ieee80211_local *local = tx->local;
479
480 if (unlikely(!sta))
481 return TX_CONTINUE;
482
483 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
484 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
485 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
486 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
487 int ac = skb_get_queue_mapping(tx->skb);
488
489 if (ieee80211_is_mgmt(hdr->frame_control) &&
490 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
491 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
492 return TX_CONTINUE;
493 }
494
495 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
496 sta->sta.addr, sta->sta.aid, ac);
497 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
498 purge_old_ps_buffers(tx->local);
499
500
501 spin_lock(&sta->ps_lock);
502
503
504
505
506
507 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
508 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
509 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
510 spin_unlock(&sta->ps_lock);
511 return TX_CONTINUE;
512 }
513
514 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
515 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
516 ps_dbg(tx->sdata,
517 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
518 sta->sta.addr, ac);
519 ieee80211_free_txskb(&local->hw, old);
520 } else
521 tx->local->total_ps_buffered++;
522
523 info->control.jiffies = jiffies;
524 info->control.vif = &tx->sdata->vif;
525 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
526 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
527 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
528 spin_unlock(&sta->ps_lock);
529
530 if (!timer_pending(&local->sta_cleanup))
531 mod_timer(&local->sta_cleanup,
532 round_jiffies(jiffies +
533 STA_INFO_CLEANUP_INTERVAL));
534
535
536
537
538
539 sta_info_recalc_tim(sta);
540
541 return TX_QUEUED;
542 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
543 ps_dbg(tx->sdata,
544 "STA %pM in PS mode, but polling/in SP -> send frame\n",
545 sta->sta.addr);
546 }
547
548 return TX_CONTINUE;
549}
550
551static ieee80211_tx_result debug_noinline
552ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
553{
554 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
555 return TX_CONTINUE;
556
557 if (tx->flags & IEEE80211_TX_UNICAST)
558 return ieee80211_tx_h_unicast_ps_buf(tx);
559 else
560 return ieee80211_tx_h_multicast_ps_buf(tx);
561}
562
563static ieee80211_tx_result debug_noinline
564ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
565{
566 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
567
568 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
569 if (tx->sdata->control_port_no_encrypt)
570 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
571 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
572 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
573 }
574
575 return TX_CONTINUE;
576}
577
578static ieee80211_tx_result debug_noinline
579ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
580{
581 struct ieee80211_key *key;
582 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
583 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
584
585 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
586 tx->key = NULL;
587 return TX_CONTINUE;
588 }
589
590 if (tx->sta &&
591 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
592 tx->key = key;
593 else if (ieee80211_is_group_privacy_action(tx->skb) &&
594 (key = rcu_dereference(tx->sdata->default_multicast_key)))
595 tx->key = key;
596 else if (ieee80211_is_mgmt(hdr->frame_control) &&
597 is_multicast_ether_addr(hdr->addr1) &&
598 ieee80211_is_robust_mgmt_frame(tx->skb) &&
599 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
600 tx->key = key;
601 else if (is_multicast_ether_addr(hdr->addr1) &&
602 (key = rcu_dereference(tx->sdata->default_multicast_key)))
603 tx->key = key;
604 else if (!is_multicast_ether_addr(hdr->addr1) &&
605 (key = rcu_dereference(tx->sdata->default_unicast_key)))
606 tx->key = key;
607 else
608 tx->key = NULL;
609
610 if (tx->key) {
611 bool skip_hw = false;
612
613
614
615 switch (tx->key->conf.cipher) {
616 case WLAN_CIPHER_SUITE_WEP40:
617 case WLAN_CIPHER_SUITE_WEP104:
618 case WLAN_CIPHER_SUITE_TKIP:
619 if (!ieee80211_is_data_present(hdr->frame_control))
620 tx->key = NULL;
621 break;
622 case WLAN_CIPHER_SUITE_CCMP:
623 case WLAN_CIPHER_SUITE_CCMP_256:
624 case WLAN_CIPHER_SUITE_GCMP:
625 case WLAN_CIPHER_SUITE_GCMP_256:
626 if (!ieee80211_is_data_present(hdr->frame_control) &&
627 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
628 tx->skb) &&
629 !ieee80211_is_group_privacy_action(tx->skb))
630 tx->key = NULL;
631 else
632 skip_hw = (tx->key->conf.flags &
633 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
634 ieee80211_is_mgmt(hdr->frame_control);
635 break;
636 case WLAN_CIPHER_SUITE_AES_CMAC:
637 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
638 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
639 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
640 if (!ieee80211_is_mgmt(hdr->frame_control))
641 tx->key = NULL;
642 break;
643 }
644
645 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
646 !ieee80211_is_deauth(hdr->frame_control)))
647 return TX_DROP;
648
649 if (!skip_hw && tx->key &&
650 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
651 info->control.hw_key = &tx->key->conf;
652 } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta &&
653 test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) {
654 return TX_DROP;
655 }
656
657 return TX_CONTINUE;
658}
659
660static ieee80211_tx_result debug_noinline
661ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
662{
663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
664 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
665 struct ieee80211_supported_band *sband;
666 u32 len;
667 struct ieee80211_tx_rate_control txrc;
668 struct ieee80211_sta_rates *ratetbl = NULL;
669 bool assoc = false;
670
671 memset(&txrc, 0, sizeof(txrc));
672
673 sband = tx->local->hw.wiphy->bands[info->band];
674
675 len = min_t(u32, tx->skb->len + FCS_LEN,
676 tx->local->hw.wiphy->frag_threshold);
677
678
679 txrc.hw = &tx->local->hw;
680 txrc.sband = sband;
681 txrc.bss_conf = &tx->sdata->vif.bss_conf;
682 txrc.skb = tx->skb;
683 txrc.reported_rate.idx = -1;
684 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
685
686 if (tx->sdata->rc_has_mcs_mask[info->band])
687 txrc.rate_idx_mcs_mask =
688 tx->sdata->rc_rateidx_mcs_mask[info->band];
689
690 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
691 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
692 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
693 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
694
695
696 if (len > tx->local->hw.wiphy->rts_threshold) {
697 txrc.rts = true;
698 }
699
700 info->control.use_rts = txrc.rts;
701 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
702
703
704
705
706
707
708
709 if (tx->sdata->vif.bss_conf.use_short_preamble &&
710 (ieee80211_is_data(hdr->frame_control) ||
711 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
712 txrc.short_preamble = true;
713
714 info->control.short_preamble = txrc.short_preamble;
715
716
717 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
718 return TX_CONTINUE;
719
720 if (tx->sta)
721 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
722
723
724
725
726
727 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
728 !rate_usable_index_exists(sband, &tx->sta->sta),
729 "%s: Dropped data frame as no usable bitrate found while "
730 "scanning and associated. Target station: "
731 "%pM on %d GHz band\n",
732 tx->sdata->name, hdr->addr1,
733 info->band ? 5 : 2))
734 return TX_DROP;
735
736
737
738
739
740 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
741
742 if (tx->sta && !info->control.skip_table)
743 ratetbl = rcu_dereference(tx->sta->sta.rates);
744
745 if (unlikely(info->control.rates[0].idx < 0)) {
746 if (ratetbl) {
747 struct ieee80211_tx_rate rate = {
748 .idx = ratetbl->rate[0].idx,
749 .flags = ratetbl->rate[0].flags,
750 .count = ratetbl->rate[0].count
751 };
752
753 if (ratetbl->rate[0].idx < 0)
754 return TX_DROP;
755
756 tx->rate = rate;
757 } else {
758 return TX_DROP;
759 }
760 } else {
761 tx->rate = info->control.rates[0];
762 }
763
764 if (txrc.reported_rate.idx < 0) {
765 txrc.reported_rate = tx->rate;
766 if (tx->sta && ieee80211_is_data(hdr->frame_control))
767 tx->sta->tx_stats.last_rate = txrc.reported_rate;
768 } else if (tx->sta)
769 tx->sta->tx_stats.last_rate = txrc.reported_rate;
770
771 if (ratetbl)
772 return TX_CONTINUE;
773
774 if (unlikely(!info->control.rates[0].count))
775 info->control.rates[0].count = 1;
776
777 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
778 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
779 info->control.rates[0].count = 1;
780
781 return TX_CONTINUE;
782}
783
784static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
785{
786 u16 *seq = &sta->tid_seq[tid];
787 __le16 ret = cpu_to_le16(*seq);
788
789
790 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
791
792 return ret;
793}
794
795static ieee80211_tx_result debug_noinline
796ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
797{
798 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
799 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
800 int tid;
801
802
803
804
805
806
807 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
808 return TX_CONTINUE;
809
810 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
811 return TX_CONTINUE;
812
813 if (ieee80211_hdrlen(hdr->frame_control) < 24)
814 return TX_CONTINUE;
815
816 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
817 return TX_CONTINUE;
818
819 if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
820 return TX_CONTINUE;
821
822
823
824
825
826
827
828 if (!ieee80211_is_data_qos(hdr->frame_control) ||
829 is_multicast_ether_addr(hdr->addr1)) {
830
831 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
832
833 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
834 tx->sdata->sequence_number += 0x10;
835 if (tx->sta)
836 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
837 return TX_CONTINUE;
838 }
839
840
841
842
843
844
845 if (!tx->sta)
846 return TX_CONTINUE;
847
848
849 tid = ieee80211_get_tid(hdr);
850 tx->sta->tx_stats.msdu[tid]++;
851
852 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
853
854 return TX_CONTINUE;
855}
856
857static int ieee80211_fragment(struct ieee80211_tx_data *tx,
858 struct sk_buff *skb, int hdrlen,
859 int frag_threshold)
860{
861 struct ieee80211_local *local = tx->local;
862 struct ieee80211_tx_info *info;
863 struct sk_buff *tmp;
864 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
865 int pos = hdrlen + per_fragm;
866 int rem = skb->len - hdrlen - per_fragm;
867
868 if (WARN_ON(rem < 0))
869 return -EINVAL;
870
871
872
873 while (rem) {
874 int fraglen = per_fragm;
875
876 if (fraglen > rem)
877 fraglen = rem;
878 rem -= fraglen;
879 tmp = dev_alloc_skb(local->tx_headroom +
880 frag_threshold +
881 tx->sdata->encrypt_headroom +
882 IEEE80211_ENCRYPT_TAILROOM);
883 if (!tmp)
884 return -ENOMEM;
885
886 __skb_queue_tail(&tx->skbs, tmp);
887
888 skb_reserve(tmp,
889 local->tx_headroom + tx->sdata->encrypt_headroom);
890
891
892 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
893
894 info = IEEE80211_SKB_CB(tmp);
895 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
896 IEEE80211_TX_CTL_FIRST_FRAGMENT);
897
898 if (rem)
899 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
900
901 skb_copy_queue_mapping(tmp, skb);
902 tmp->priority = skb->priority;
903 tmp->dev = skb->dev;
904
905
906 skb_put_data(tmp, skb->data, hdrlen);
907 skb_put_data(tmp, skb->data + pos, fraglen);
908
909 pos += fraglen;
910 }
911
912
913 skb_trim(skb, hdrlen + per_fragm);
914 return 0;
915}
916
917static ieee80211_tx_result debug_noinline
918ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
919{
920 struct sk_buff *skb = tx->skb;
921 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
922 struct ieee80211_hdr *hdr = (void *)skb->data;
923 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
924 int hdrlen;
925 int fragnum;
926
927
928 __skb_queue_tail(&tx->skbs, skb);
929 tx->skb = NULL;
930
931 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
932 return TX_CONTINUE;
933
934 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
935 return TX_CONTINUE;
936
937
938
939
940
941
942 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
943 return TX_DROP;
944
945 hdrlen = ieee80211_hdrlen(hdr->frame_control);
946
947
948 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
949 return TX_DROP;
950
951
952
953
954
955
956
957
958
959 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
960 return TX_DROP;
961
962
963 fragnum = 0;
964
965 skb_queue_walk(&tx->skbs, skb) {
966 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
967
968 hdr = (void *)skb->data;
969 info = IEEE80211_SKB_CB(skb);
970
971 if (!skb_queue_is_last(&tx->skbs, skb)) {
972 hdr->frame_control |= morefrags;
973
974
975
976
977 info->control.rates[1].idx = -1;
978 info->control.rates[2].idx = -1;
979 info->control.rates[3].idx = -1;
980 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
981 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
982 } else {
983 hdr->frame_control &= ~morefrags;
984 }
985 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
986 fragnum++;
987 }
988
989 return TX_CONTINUE;
990}
991
992static ieee80211_tx_result debug_noinline
993ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
994{
995 struct sk_buff *skb;
996 int ac = -1;
997
998 if (!tx->sta)
999 return TX_CONTINUE;
1000
1001 skb_queue_walk(&tx->skbs, skb) {
1002 ac = skb_get_queue_mapping(skb);
1003 tx->sta->tx_stats.bytes[ac] += skb->len;
1004 }
1005 if (ac >= 0)
1006 tx->sta->tx_stats.packets[ac]++;
1007
1008 return TX_CONTINUE;
1009}
1010
1011static ieee80211_tx_result debug_noinline
1012ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1013{
1014 if (!tx->key)
1015 return TX_CONTINUE;
1016
1017 switch (tx->key->conf.cipher) {
1018 case WLAN_CIPHER_SUITE_WEP40:
1019 case WLAN_CIPHER_SUITE_WEP104:
1020 return ieee80211_crypto_wep_encrypt(tx);
1021 case WLAN_CIPHER_SUITE_TKIP:
1022 return ieee80211_crypto_tkip_encrypt(tx);
1023 case WLAN_CIPHER_SUITE_CCMP:
1024 return ieee80211_crypto_ccmp_encrypt(
1025 tx, IEEE80211_CCMP_MIC_LEN);
1026 case WLAN_CIPHER_SUITE_CCMP_256:
1027 return ieee80211_crypto_ccmp_encrypt(
1028 tx, IEEE80211_CCMP_256_MIC_LEN);
1029 case WLAN_CIPHER_SUITE_AES_CMAC:
1030 return ieee80211_crypto_aes_cmac_encrypt(tx);
1031 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1032 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
1033 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1034 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1035 return ieee80211_crypto_aes_gmac_encrypt(tx);
1036 case WLAN_CIPHER_SUITE_GCMP:
1037 case WLAN_CIPHER_SUITE_GCMP_256:
1038 return ieee80211_crypto_gcmp_encrypt(tx);
1039 default:
1040 return ieee80211_crypto_hw_encrypt(tx);
1041 }
1042
1043 return TX_DROP;
1044}
1045
1046static ieee80211_tx_result debug_noinline
1047ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1048{
1049 struct sk_buff *skb;
1050 struct ieee80211_hdr *hdr;
1051 int next_len;
1052 bool group_addr;
1053
1054 skb_queue_walk(&tx->skbs, skb) {
1055 hdr = (void *) skb->data;
1056 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1057 break;
1058 if (!skb_queue_is_last(&tx->skbs, skb)) {
1059 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1060 next_len = next->len;
1061 } else
1062 next_len = 0;
1063 group_addr = is_multicast_ether_addr(hdr->addr1);
1064
1065 hdr->duration_id =
1066 ieee80211_duration(tx, skb, group_addr, next_len);
1067 }
1068
1069 return TX_CONTINUE;
1070}
1071
1072
1073
1074static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1075 struct sk_buff *skb,
1076 struct ieee80211_tx_info *info,
1077 struct tid_ampdu_tx *tid_tx,
1078 int tid)
1079{
1080 bool queued = false;
1081 bool reset_agg_timer = false;
1082 struct sk_buff *purge_skb = NULL;
1083
1084 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1085 info->flags |= IEEE80211_TX_CTL_AMPDU;
1086 reset_agg_timer = true;
1087 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1088
1089
1090
1091
1092 } else if (!tx->sta->sta.txq[tid]) {
1093 spin_lock(&tx->sta->lock);
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1113
1114 if (!tid_tx) {
1115
1116 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1117 info->flags |= IEEE80211_TX_CTL_AMPDU;
1118 reset_agg_timer = true;
1119 } else {
1120 queued = true;
1121 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1122 clear_sta_flag(tx->sta, WLAN_STA_SP);
1123 ps_dbg(tx->sta->sdata,
1124 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1125 tx->sta->sta.addr, tx->sta->sta.aid);
1126 }
1127 info->control.vif = &tx->sdata->vif;
1128 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1129 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
1130 __skb_queue_tail(&tid_tx->pending, skb);
1131 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1132 purge_skb = __skb_dequeue(&tid_tx->pending);
1133 }
1134 spin_unlock(&tx->sta->lock);
1135
1136 if (purge_skb)
1137 ieee80211_free_txskb(&tx->local->hw, purge_skb);
1138 }
1139
1140
1141 if (reset_agg_timer)
1142 tid_tx->last_tx = jiffies;
1143
1144 return queued;
1145}
1146
1147
1148
1149
1150
1151
1152static ieee80211_tx_result
1153ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1154 struct ieee80211_tx_data *tx,
1155 struct sta_info *sta, struct sk_buff *skb)
1156{
1157 struct ieee80211_local *local = sdata->local;
1158 struct ieee80211_hdr *hdr;
1159 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1160 int tid;
1161
1162 memset(tx, 0, sizeof(*tx));
1163 tx->skb = skb;
1164 tx->local = local;
1165 tx->sdata = sdata;
1166 __skb_queue_head_init(&tx->skbs);
1167
1168
1169
1170
1171
1172
1173 info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1174
1175 hdr = (struct ieee80211_hdr *) skb->data;
1176
1177 if (likely(sta)) {
1178 if (!IS_ERR(sta))
1179 tx->sta = sta;
1180 } else {
1181 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1182 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1183 if (!tx->sta && sdata->wdev.use_4addr)
1184 return TX_DROP;
1185 } else if (tx->sdata->control_port_protocol == tx->skb->protocol) {
1186 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1187 }
1188 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1189 tx->sta = sta_info_get(sdata, hdr->addr1);
1190 }
1191
1192 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
1193 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
1194 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1195 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1196 struct tid_ampdu_tx *tid_tx;
1197
1198 tid = ieee80211_get_tid(hdr);
1199
1200 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1201 if (tid_tx) {
1202 bool queued;
1203
1204 queued = ieee80211_tx_prep_agg(tx, skb, info,
1205 tid_tx, tid);
1206
1207 if (unlikely(queued))
1208 return TX_QUEUED;
1209 }
1210 }
1211
1212 if (is_multicast_ether_addr(hdr->addr1)) {
1213 tx->flags &= ~IEEE80211_TX_UNICAST;
1214 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1215 } else
1216 tx->flags |= IEEE80211_TX_UNICAST;
1217
1218 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1219 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1220 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1221 info->flags & IEEE80211_TX_CTL_AMPDU)
1222 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1223 }
1224
1225 if (!tx->sta)
1226 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1227 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
1228 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1229 ieee80211_check_fast_xmit(tx->sta);
1230 }
1231
1232 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1233
1234 return TX_CONTINUE;
1235}
1236
1237static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1238 struct ieee80211_vif *vif,
1239 struct sta_info *sta,
1240 struct sk_buff *skb)
1241{
1242 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1243 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1244 struct ieee80211_txq *txq = NULL;
1245
1246 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1247 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1248 return NULL;
1249
1250 if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
1251 unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1252 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
1253 ieee80211_is_bufferable_mmpdu(hdr->frame_control) ||
1254 vif->type == NL80211_IFTYPE_STATION) &&
1255 sta && sta->uploaded) {
1256
1257
1258
1259
1260 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1261 }
1262 } else if (sta) {
1263 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1264
1265 if (!sta->uploaded)
1266 return NULL;
1267
1268 txq = sta->sta.txq[tid];
1269 } else if (vif) {
1270 txq = vif->txq;
1271 }
1272
1273 if (!txq)
1274 return NULL;
1275
1276 return to_txq_info(txq);
1277}
1278
1279static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1280{
1281 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1282}
1283
1284static u32 codel_skb_len_func(const struct sk_buff *skb)
1285{
1286 return skb->len;
1287}
1288
1289static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1290{
1291 const struct ieee80211_tx_info *info;
1292
1293 info = (const struct ieee80211_tx_info *)skb->cb;
1294 return info->control.enqueue_time;
1295}
1296
1297static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1298 void *ctx)
1299{
1300 struct ieee80211_local *local;
1301 struct txq_info *txqi;
1302 struct fq *fq;
1303 struct fq_flow *flow;
1304
1305 txqi = ctx;
1306 local = vif_to_sdata(txqi->txq.vif)->local;
1307 fq = &local->fq;
1308
1309 if (cvars == &txqi->def_cvars)
1310 flow = &txqi->tin.default_flow;
1311 else
1312 flow = &fq->flows[cvars - local->cvars];
1313
1314 return fq_flow_dequeue(fq, flow);
1315}
1316
1317static void codel_drop_func(struct sk_buff *skb,
1318 void *ctx)
1319{
1320 struct ieee80211_local *local;
1321 struct ieee80211_hw *hw;
1322 struct txq_info *txqi;
1323
1324 txqi = ctx;
1325 local = vif_to_sdata(txqi->txq.vif)->local;
1326 hw = &local->hw;
1327
1328 ieee80211_free_txskb(hw, skb);
1329}
1330
1331static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1332 struct fq_tin *tin,
1333 struct fq_flow *flow)
1334{
1335 struct ieee80211_local *local;
1336 struct txq_info *txqi;
1337 struct codel_vars *cvars;
1338 struct codel_params *cparams;
1339 struct codel_stats *cstats;
1340
1341 local = container_of(fq, struct ieee80211_local, fq);
1342 txqi = container_of(tin, struct txq_info, tin);
1343 cstats = &txqi->cstats;
1344
1345 if (txqi->txq.sta) {
1346 struct sta_info *sta = container_of(txqi->txq.sta,
1347 struct sta_info, sta);
1348 cparams = &sta->cparams;
1349 } else {
1350 cparams = &local->cparams;
1351 }
1352
1353 if (flow == &tin->default_flow)
1354 cvars = &txqi->def_cvars;
1355 else
1356 cvars = &local->cvars[flow - fq->flows];
1357
1358 return codel_dequeue(txqi,
1359 &flow->backlog,
1360 cparams,
1361 cvars,
1362 cstats,
1363 codel_skb_len_func,
1364 codel_skb_time_func,
1365 codel_drop_func,
1366 codel_dequeue_func);
1367}
1368
1369static void fq_skb_free_func(struct fq *fq,
1370 struct fq_tin *tin,
1371 struct fq_flow *flow,
1372 struct sk_buff *skb)
1373{
1374 struct ieee80211_local *local;
1375
1376 local = container_of(fq, struct ieee80211_local, fq);
1377 ieee80211_free_txskb(&local->hw, skb);
1378}
1379
1380static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1381 struct txq_info *txqi,
1382 struct sk_buff *skb)
1383{
1384 struct fq *fq = &local->fq;
1385 struct fq_tin *tin = &txqi->tin;
1386 u32 flow_idx = fq_flow_idx(fq, skb);
1387
1388 ieee80211_set_skb_enqueue_time(skb);
1389
1390 spin_lock_bh(&fq->lock);
1391 fq_tin_enqueue(fq, tin, flow_idx, skb,
1392 fq_skb_free_func);
1393 spin_unlock_bh(&fq->lock);
1394}
1395
1396static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1397 struct fq_flow *flow, struct sk_buff *skb,
1398 void *data)
1399{
1400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1401
1402 return info->control.vif == data;
1403}
1404
1405void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1406 struct ieee80211_sub_if_data *sdata)
1407{
1408 struct fq *fq = &local->fq;
1409 struct txq_info *txqi;
1410 struct fq_tin *tin;
1411 struct ieee80211_sub_if_data *ap;
1412
1413 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1414 return;
1415
1416 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1417
1418 if (!ap->vif.txq)
1419 return;
1420
1421 txqi = to_txq_info(ap->vif.txq);
1422 tin = &txqi->tin;
1423
1424 spin_lock_bh(&fq->lock);
1425 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1426 fq_skb_free_func);
1427 spin_unlock_bh(&fq->lock);
1428}
1429
1430void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1431 struct sta_info *sta,
1432 struct txq_info *txqi, int tid)
1433{
1434 fq_tin_init(&txqi->tin);
1435 codel_vars_init(&txqi->def_cvars);
1436 codel_stats_init(&txqi->cstats);
1437 __skb_queue_head_init(&txqi->frags);
1438 INIT_LIST_HEAD(&txqi->schedule_order);
1439
1440 txqi->txq.vif = &sdata->vif;
1441
1442 if (!sta) {
1443 sdata->vif.txq = &txqi->txq;
1444 txqi->txq.tid = 0;
1445 txqi->txq.ac = IEEE80211_AC_BE;
1446
1447 return;
1448 }
1449
1450 if (tid == IEEE80211_NUM_TIDS) {
1451 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1452
1453 if (!ieee80211_hw_check(&sdata->local->hw,
1454 STA_MMPDU_TXQ))
1455 return;
1456 } else if (!ieee80211_hw_check(&sdata->local->hw,
1457 BUFF_MMPDU_TXQ)) {
1458
1459 return;
1460 }
1461 txqi->txq.ac = IEEE80211_AC_VO;
1462 } else {
1463 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1464 }
1465
1466 txqi->txq.sta = &sta->sta;
1467 txqi->txq.tid = tid;
1468 sta->sta.txq[tid] = &txqi->txq;
1469}
1470
1471void ieee80211_txq_purge(struct ieee80211_local *local,
1472 struct txq_info *txqi)
1473{
1474 struct fq *fq = &local->fq;
1475 struct fq_tin *tin = &txqi->tin;
1476
1477 spin_lock_bh(&fq->lock);
1478 fq_tin_reset(fq, tin, fq_skb_free_func);
1479 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
1480 spin_unlock_bh(&fq->lock);
1481
1482 spin_lock_bh(&local->active_txq_lock[txqi->txq.ac]);
1483 list_del_init(&txqi->schedule_order);
1484 spin_unlock_bh(&local->active_txq_lock[txqi->txq.ac]);
1485}
1486
1487void ieee80211_txq_set_params(struct ieee80211_local *local)
1488{
1489 if (local->hw.wiphy->txq_limit)
1490 local->fq.limit = local->hw.wiphy->txq_limit;
1491 else
1492 local->hw.wiphy->txq_limit = local->fq.limit;
1493
1494 if (local->hw.wiphy->txq_memory_limit)
1495 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1496 else
1497 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1498
1499 if (local->hw.wiphy->txq_quantum)
1500 local->fq.quantum = local->hw.wiphy->txq_quantum;
1501 else
1502 local->hw.wiphy->txq_quantum = local->fq.quantum;
1503}
1504
1505int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1506{
1507 struct fq *fq = &local->fq;
1508 int ret;
1509 int i;
1510 bool supp_vht = false;
1511 enum nl80211_band band;
1512
1513 if (!local->ops->wake_tx_queue)
1514 return 0;
1515
1516 ret = fq_init(fq, 4096);
1517 if (ret)
1518 return ret;
1519
1520
1521
1522
1523
1524 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1525 struct ieee80211_supported_band *sband;
1526
1527 sband = local->hw.wiphy->bands[band];
1528 if (!sband)
1529 continue;
1530
1531 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1532 }
1533
1534 if (!supp_vht)
1535 fq->memory_limit = 4 << 20;
1536
1537 codel_params_init(&local->cparams);
1538 local->cparams.interval = MS2TIME(100);
1539 local->cparams.target = MS2TIME(20);
1540 local->cparams.ecn = true;
1541
1542 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1543 GFP_KERNEL);
1544 if (!local->cvars) {
1545 spin_lock_bh(&fq->lock);
1546 fq_reset(fq, fq_skb_free_func);
1547 spin_unlock_bh(&fq->lock);
1548 return -ENOMEM;
1549 }
1550
1551 for (i = 0; i < fq->flows_cnt; i++)
1552 codel_vars_init(&local->cvars[i]);
1553
1554 ieee80211_txq_set_params(local);
1555
1556 return 0;
1557}
1558
1559void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1560{
1561 struct fq *fq = &local->fq;
1562
1563 if (!local->ops->wake_tx_queue)
1564 return;
1565
1566 kfree(local->cvars);
1567 local->cvars = NULL;
1568
1569 spin_lock_bh(&fq->lock);
1570 fq_reset(fq, fq_skb_free_func);
1571 spin_unlock_bh(&fq->lock);
1572}
1573
1574static bool ieee80211_queue_skb(struct ieee80211_local *local,
1575 struct ieee80211_sub_if_data *sdata,
1576 struct sta_info *sta,
1577 struct sk_buff *skb)
1578{
1579 struct ieee80211_vif *vif;
1580 struct txq_info *txqi;
1581
1582 if (!local->ops->wake_tx_queue ||
1583 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1584 return false;
1585
1586 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1587 sdata = container_of(sdata->bss,
1588 struct ieee80211_sub_if_data, u.ap);
1589
1590 vif = &sdata->vif;
1591 txqi = ieee80211_get_txq(local, vif, sta, skb);
1592
1593 if (!txqi)
1594 return false;
1595
1596 ieee80211_txq_enqueue(local, txqi, skb);
1597
1598 schedule_and_wake_txq(local, txqi);
1599
1600 return true;
1601}
1602
1603static bool ieee80211_tx_frags(struct ieee80211_local *local,
1604 struct ieee80211_vif *vif,
1605 struct sta_info *sta,
1606 struct sk_buff_head *skbs,
1607 bool txpending)
1608{
1609 struct ieee80211_tx_control control = {};
1610 struct sk_buff *skb, *tmp;
1611 unsigned long flags;
1612
1613 skb_queue_walk_safe(skbs, skb, tmp) {
1614 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1615 int q = info->hw_queue;
1616
1617#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1618 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1619 __skb_unlink(skb, skbs);
1620 ieee80211_free_txskb(&local->hw, skb);
1621 continue;
1622 }
1623#endif
1624
1625 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1626 if (local->queue_stop_reasons[q] ||
1627 (!txpending && !skb_queue_empty(&local->pending[q]))) {
1628 if (unlikely(info->flags &
1629 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1630 if (local->queue_stop_reasons[q] &
1631 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1632
1633
1634
1635
1636
1637
1638 spin_unlock_irqrestore(
1639 &local->queue_stop_reason_lock,
1640 flags);
1641 ieee80211_purge_tx_queue(&local->hw,
1642 skbs);
1643 return true;
1644 }
1645 } else {
1646
1647
1648
1649
1650
1651
1652 if (txpending)
1653 skb_queue_splice_init(skbs,
1654 &local->pending[q]);
1655 else
1656 skb_queue_splice_tail_init(skbs,
1657 &local->pending[q]);
1658
1659 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1660 flags);
1661 return false;
1662 }
1663 }
1664 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1665
1666 info->control.vif = vif;
1667 control.sta = sta ? &sta->sta : NULL;
1668
1669 __skb_unlink(skb, skbs);
1670 drv_tx(local, &control, skb);
1671 }
1672
1673 return true;
1674}
1675
1676
1677
1678
1679static bool __ieee80211_tx(struct ieee80211_local *local,
1680 struct sk_buff_head *skbs, int led_len,
1681 struct sta_info *sta, bool txpending)
1682{
1683 struct ieee80211_tx_info *info;
1684 struct ieee80211_sub_if_data *sdata;
1685 struct ieee80211_vif *vif;
1686 struct sk_buff *skb;
1687 bool result = true;
1688 __le16 fc;
1689
1690 if (WARN_ON(skb_queue_empty(skbs)))
1691 return true;
1692
1693 skb = skb_peek(skbs);
1694 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1695 info = IEEE80211_SKB_CB(skb);
1696 sdata = vif_to_sdata(info->control.vif);
1697 if (sta && !sta->uploaded)
1698 sta = NULL;
1699
1700 switch (sdata->vif.type) {
1701 case NL80211_IFTYPE_MONITOR:
1702 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1703 vif = &sdata->vif;
1704 break;
1705 }
1706 sdata = rcu_dereference(local->monitor_sdata);
1707 if (sdata) {
1708 vif = &sdata->vif;
1709 info->hw_queue =
1710 vif->hw_queue[skb_get_queue_mapping(skb)];
1711 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1712 ieee80211_purge_tx_queue(&local->hw, skbs);
1713 return true;
1714 } else
1715 vif = NULL;
1716 break;
1717 case NL80211_IFTYPE_AP_VLAN:
1718 sdata = container_of(sdata->bss,
1719 struct ieee80211_sub_if_data, u.ap);
1720 fallthrough;
1721 default:
1722 vif = &sdata->vif;
1723 break;
1724 }
1725
1726 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
1727
1728 ieee80211_tpt_led_trig_tx(local, fc, led_len);
1729
1730 WARN_ON_ONCE(!skb_queue_empty(skbs));
1731
1732 return result;
1733}
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1744{
1745 ieee80211_tx_result res = TX_DROP;
1746
1747#define CALL_TXH(txh) \
1748 do { \
1749 res = txh(tx); \
1750 if (res != TX_CONTINUE) \
1751 goto txh_done; \
1752 } while (0)
1753
1754 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1755 CALL_TXH(ieee80211_tx_h_check_assoc);
1756 CALL_TXH(ieee80211_tx_h_ps_buf);
1757 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1758 CALL_TXH(ieee80211_tx_h_select_key);
1759 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1760 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1761
1762 txh_done:
1763 if (unlikely(res == TX_DROP)) {
1764 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1765 if (tx->skb)
1766 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1767 else
1768 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1769 return -1;
1770 } else if (unlikely(res == TX_QUEUED)) {
1771 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1772 return -1;
1773 }
1774
1775 return 0;
1776}
1777
1778
1779
1780
1781
1782static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1783{
1784 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1785 ieee80211_tx_result res = TX_CONTINUE;
1786
1787 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1788 __skb_queue_tail(&tx->skbs, tx->skb);
1789 tx->skb = NULL;
1790 goto txh_done;
1791 }
1792
1793 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1794 CALL_TXH(ieee80211_tx_h_sequence);
1795 CALL_TXH(ieee80211_tx_h_fragment);
1796
1797 CALL_TXH(ieee80211_tx_h_stats);
1798 CALL_TXH(ieee80211_tx_h_encrypt);
1799 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1800 CALL_TXH(ieee80211_tx_h_calculate_duration);
1801#undef CALL_TXH
1802
1803 txh_done:
1804 if (unlikely(res == TX_DROP)) {
1805 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1806 if (tx->skb)
1807 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1808 else
1809 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1810 return -1;
1811 } else if (unlikely(res == TX_QUEUED)) {
1812 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1813 return -1;
1814 }
1815
1816 return 0;
1817}
1818
1819static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1820{
1821 int r = invoke_tx_handlers_early(tx);
1822
1823 if (r)
1824 return r;
1825 return invoke_tx_handlers_late(tx);
1826}
1827
1828bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1829 struct ieee80211_vif *vif, struct sk_buff *skb,
1830 int band, struct ieee80211_sta **sta)
1831{
1832 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1833 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1834 struct ieee80211_tx_data tx;
1835 struct sk_buff *skb2;
1836
1837 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
1838 return false;
1839
1840 info->band = band;
1841 info->control.vif = vif;
1842 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1843
1844 if (invoke_tx_handlers(&tx))
1845 return false;
1846
1847 if (sta) {
1848 if (tx.sta)
1849 *sta = &tx.sta->sta;
1850 else
1851 *sta = NULL;
1852 }
1853
1854
1855 skb2 = __skb_dequeue(&tx.skbs);
1856 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1857 ieee80211_free_txskb(hw, skb2);
1858 ieee80211_purge_tx_queue(hw, &tx.skbs);
1859 return false;
1860 }
1861
1862 return true;
1863}
1864EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1865
1866
1867
1868
1869static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1870 struct sta_info *sta, struct sk_buff *skb,
1871 bool txpending)
1872{
1873 struct ieee80211_local *local = sdata->local;
1874 struct ieee80211_tx_data tx;
1875 ieee80211_tx_result res_prepare;
1876 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1877 bool result = true;
1878 int led_len;
1879
1880 if (unlikely(skb->len < 10)) {
1881 dev_kfree_skb(skb);
1882 return true;
1883 }
1884
1885
1886 led_len = skb->len;
1887 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
1888
1889 if (unlikely(res_prepare == TX_DROP)) {
1890 ieee80211_free_txskb(&local->hw, skb);
1891 return true;
1892 } else if (unlikely(res_prepare == TX_QUEUED)) {
1893 return true;
1894 }
1895
1896
1897 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1898 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1899 info->hw_queue =
1900 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1901
1902 if (invoke_tx_handlers_early(&tx))
1903 return true;
1904
1905 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1906 return true;
1907
1908 if (!invoke_tx_handlers_late(&tx))
1909 result = __ieee80211_tx(local, &tx.skbs, led_len,
1910 tx.sta, txpending);
1911
1912 return result;
1913}
1914
1915
1916
1917enum ieee80211_encrypt {
1918 ENCRYPT_NO,
1919 ENCRYPT_MGMT,
1920 ENCRYPT_DATA,
1921};
1922
1923static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1924 struct sk_buff *skb,
1925 int head_need,
1926 enum ieee80211_encrypt encrypt)
1927{
1928 struct ieee80211_local *local = sdata->local;
1929 bool enc_tailroom;
1930 int tail_need = 0;
1931
1932 enc_tailroom = encrypt == ENCRYPT_MGMT ||
1933 (encrypt == ENCRYPT_DATA &&
1934 sdata->crypto_tx_tailroom_needed_cnt);
1935
1936 if (enc_tailroom) {
1937 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1938 tail_need -= skb_tailroom(skb);
1939 tail_need = max_t(int, tail_need, 0);
1940 }
1941
1942 if (skb_cloned(skb) &&
1943 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1944 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
1945 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1946 else if (head_need || tail_need)
1947 I802_DEBUG_INC(local->tx_expand_skb_head);
1948 else
1949 return 0;
1950
1951 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
1952 wiphy_debug(local->hw.wiphy,
1953 "failed to reallocate TX buffer\n");
1954 return -ENOMEM;
1955 }
1956
1957 return 0;
1958}
1959
1960void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1961 struct sta_info *sta, struct sk_buff *skb)
1962{
1963 struct ieee80211_local *local = sdata->local;
1964 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1965 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1966 int headroom;
1967 enum ieee80211_encrypt encrypt;
1968
1969 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
1970 encrypt = ENCRYPT_NO;
1971 else if (ieee80211_is_mgmt(hdr->frame_control))
1972 encrypt = ENCRYPT_MGMT;
1973 else
1974 encrypt = ENCRYPT_DATA;
1975
1976 headroom = local->tx_headroom;
1977 if (encrypt != ENCRYPT_NO)
1978 headroom += sdata->encrypt_headroom;
1979 headroom -= skb_headroom(skb);
1980 headroom = max_t(int, 0, headroom);
1981
1982 if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) {
1983 ieee80211_free_txskb(&local->hw, skb);
1984 return;
1985 }
1986
1987
1988 hdr = (struct ieee80211_hdr *) skb->data;
1989 info->control.vif = &sdata->vif;
1990
1991 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1992 if (ieee80211_is_data(hdr->frame_control) &&
1993 is_unicast_ether_addr(hdr->addr1)) {
1994 if (mesh_nexthop_resolve(sdata, skb))
1995 return;
1996 } else {
1997 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1998 }
1999 }
2000
2001 ieee80211_set_qos_hdr(sdata, skb);
2002 ieee80211_tx(sdata, sta, skb, false);
2003}
2004
2005bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
2006 struct net_device *dev)
2007{
2008 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2009 struct ieee80211_radiotap_iterator iterator;
2010 struct ieee80211_radiotap_header *rthdr =
2011 (struct ieee80211_radiotap_header *) skb->data;
2012 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2013 struct ieee80211_supported_band *sband =
2014 local->hw.wiphy->bands[info->band];
2015 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2016 NULL);
2017 u16 txflags;
2018 u16 rate = 0;
2019 bool rate_found = false;
2020 u8 rate_retries = 0;
2021 u16 rate_flags = 0;
2022 u8 mcs_known, mcs_flags, mcs_bw;
2023 u16 vht_known;
2024 u8 vht_mcs = 0, vht_nss = 0;
2025 int i;
2026
2027
2028 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2029 return false;
2030
2031
2032 if (unlikely(rthdr->it_version))
2033 return false;
2034
2035
2036 if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data)))
2037 return false;
2038
2039 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2040 IEEE80211_TX_CTL_DONTFRAG;
2041
2042
2043
2044
2045
2046
2047
2048 while (!ret) {
2049 ret = ieee80211_radiotap_iterator_next(&iterator);
2050
2051 if (ret)
2052 continue;
2053
2054
2055 switch (iterator.this_arg_index) {
2056
2057
2058
2059
2060
2061
2062 case IEEE80211_RADIOTAP_FLAGS:
2063 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2064
2065
2066
2067
2068
2069
2070
2071 if (skb->len < (iterator._max_length + FCS_LEN))
2072 return false;
2073
2074 skb_trim(skb, skb->len - FCS_LEN);
2075 }
2076 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2077 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2078 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2079 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2080 break;
2081
2082 case IEEE80211_RADIOTAP_TX_FLAGS:
2083 txflags = get_unaligned_le16(iterator.this_arg);
2084 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2085 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2086 if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO)
2087 info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO;
2088 if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER)
2089 info->control.flags |=
2090 IEEE80211_TX_CTRL_DONT_REORDER;
2091 break;
2092
2093 case IEEE80211_RADIOTAP_RATE:
2094 rate = *iterator.this_arg;
2095 rate_flags = 0;
2096 rate_found = true;
2097 break;
2098
2099 case IEEE80211_RADIOTAP_DATA_RETRIES:
2100 rate_retries = *iterator.this_arg;
2101 break;
2102
2103 case IEEE80211_RADIOTAP_MCS:
2104 mcs_known = iterator.this_arg[0];
2105 mcs_flags = iterator.this_arg[1];
2106 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2107 break;
2108
2109 rate_found = true;
2110 rate = iterator.this_arg[2];
2111 rate_flags = IEEE80211_TX_RC_MCS;
2112
2113 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2114 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2115 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2116
2117 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2118 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2119 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2120 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2121
2122 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_FEC &&
2123 mcs_flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC)
2124 info->flags |= IEEE80211_TX_CTL_LDPC;
2125
2126 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_STBC) {
2127 u8 stbc = u8_get_bits(mcs_flags,
2128 IEEE80211_RADIOTAP_MCS_STBC_MASK);
2129
2130 info->flags |=
2131 u32_encode_bits(stbc,
2132 IEEE80211_TX_CTL_STBC);
2133 }
2134 break;
2135
2136 case IEEE80211_RADIOTAP_VHT:
2137 vht_known = get_unaligned_le16(iterator.this_arg);
2138 rate_found = true;
2139
2140 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2141 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2142 (iterator.this_arg[2] &
2143 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2144 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2145 if (vht_known &
2146 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2147 if (iterator.this_arg[3] == 1)
2148 rate_flags |=
2149 IEEE80211_TX_RC_40_MHZ_WIDTH;
2150 else if (iterator.this_arg[3] == 4)
2151 rate_flags |=
2152 IEEE80211_TX_RC_80_MHZ_WIDTH;
2153 else if (iterator.this_arg[3] == 11)
2154 rate_flags |=
2155 IEEE80211_TX_RC_160_MHZ_WIDTH;
2156 }
2157
2158 vht_mcs = iterator.this_arg[4] >> 4;
2159 vht_nss = iterator.this_arg[4] & 0xF;
2160 break;
2161
2162
2163
2164
2165
2166
2167
2168 default:
2169 break;
2170 }
2171 }
2172
2173 if (ret != -ENOENT)
2174 return false;
2175
2176 if (rate_found) {
2177 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2178
2179 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2180 info->control.rates[i].idx = -1;
2181 info->control.rates[i].flags = 0;
2182 info->control.rates[i].count = 0;
2183 }
2184
2185 if (rate_flags & IEEE80211_TX_RC_MCS) {
2186 info->control.rates[0].idx = rate;
2187 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2188 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2189 vht_nss);
2190 } else {
2191 for (i = 0; i < sband->n_bitrates; i++) {
2192 if (rate * 5 != sband->bitrates[i].bitrate)
2193 continue;
2194
2195 info->control.rates[0].idx = i;
2196 break;
2197 }
2198 }
2199
2200 if (info->control.rates[0].idx < 0)
2201 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2202
2203 info->control.rates[0].flags = rate_flags;
2204 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2205 local->hw.max_rate_tries);
2206 }
2207
2208 return true;
2209}
2210
2211netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2212 struct net_device *dev)
2213{
2214 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2215 struct ieee80211_chanctx_conf *chanctx_conf;
2216 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2217 struct ieee80211_hdr *hdr;
2218 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2219 struct cfg80211_chan_def *chandef;
2220 u16 len_rthdr;
2221 int hdrlen;
2222
2223 memset(info, 0, sizeof(*info));
2224 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2225 IEEE80211_TX_CTL_INJECTED;
2226
2227
2228 if (!ieee80211_parse_tx_radiotap(skb, dev))
2229 goto fail;
2230
2231
2232 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2233
2234
2235
2236
2237
2238
2239
2240 skb_set_mac_header(skb, len_rthdr);
2241
2242
2243
2244
2245 skb_set_network_header(skb, len_rthdr);
2246 skb_set_transport_header(skb, len_rthdr);
2247
2248 if (skb->len < len_rthdr + 2)
2249 goto fail;
2250
2251 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2252 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2253
2254 if (skb->len < len_rthdr + hdrlen)
2255 goto fail;
2256
2257
2258
2259
2260
2261 if (ieee80211_is_data(hdr->frame_control) &&
2262 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2263 u8 *payload = (u8 *)hdr + hdrlen;
2264
2265 if (ether_addr_equal(payload, rfc1042_header))
2266 skb->protocol = cpu_to_be16((payload[6] << 8) |
2267 payload[7]);
2268 }
2269
2270
2271
2272
2273
2274
2275 if (ieee80211_is_data_qos(hdr->frame_control) &&
2276 !(info->control.flags & IEEE80211_TX_CTRL_DONT_REORDER)) {
2277 u8 *p = ieee80211_get_qos_ctl(hdr);
2278 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
2279 }
2280
2281 rcu_read_lock();
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2294
2295 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2296 if (!ieee80211_sdata_running(tmp_sdata))
2297 continue;
2298 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2299 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2300 continue;
2301 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
2302 sdata = tmp_sdata;
2303 break;
2304 }
2305 }
2306
2307 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2308 if (!chanctx_conf) {
2309 tmp_sdata = rcu_dereference(local->monitor_sdata);
2310 if (tmp_sdata)
2311 chanctx_conf =
2312 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2313 }
2314
2315 if (chanctx_conf)
2316 chandef = &chanctx_conf->def;
2317 else if (!local->use_chanctx)
2318 chandef = &local->_oper_chandef;
2319 else
2320 goto fail_rcu;
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2339 sdata->vif.type))
2340 goto fail_rcu;
2341
2342 info->band = chandef->chan->band;
2343
2344
2345 skb_pull(skb, len_rthdr);
2346
2347 ieee80211_xmit(sdata, NULL, skb);
2348 rcu_read_unlock();
2349
2350 return NETDEV_TX_OK;
2351
2352fail_rcu:
2353 rcu_read_unlock();
2354fail:
2355 dev_kfree_skb(skb);
2356 return NETDEV_TX_OK;
2357}
2358
2359static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2360{
2361 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2362
2363 return ethertype == ETH_P_TDLS &&
2364 skb->len > 14 &&
2365 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2366}
2367
2368int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2369 struct sk_buff *skb,
2370 struct sta_info **sta_out)
2371{
2372 struct sta_info *sta;
2373
2374 switch (sdata->vif.type) {
2375 case NL80211_IFTYPE_AP_VLAN:
2376 sta = rcu_dereference(sdata->u.vlan.sta);
2377 if (sta) {
2378 *sta_out = sta;
2379 return 0;
2380 } else if (sdata->wdev.use_4addr) {
2381 return -ENOLINK;
2382 }
2383 fallthrough;
2384 case NL80211_IFTYPE_AP:
2385 case NL80211_IFTYPE_OCB:
2386 case NL80211_IFTYPE_ADHOC:
2387 if (is_multicast_ether_addr(skb->data)) {
2388 *sta_out = ERR_PTR(-ENOENT);
2389 return 0;
2390 }
2391 sta = sta_info_get_bss(sdata, skb->data);
2392 break;
2393#ifdef CONFIG_MAC80211_MESH
2394 case NL80211_IFTYPE_MESH_POINT:
2395
2396 *sta_out = NULL;
2397 return 0;
2398#endif
2399 case NL80211_IFTYPE_STATION:
2400 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2401 sta = sta_info_get(sdata, skb->data);
2402 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2403 if (test_sta_flag(sta,
2404 WLAN_STA_TDLS_PEER_AUTH)) {
2405 *sta_out = sta;
2406 return 0;
2407 }
2408
2409
2410
2411
2412
2413
2414
2415
2416 if (!ieee80211_is_tdls_setup(skb))
2417 return -EINVAL;
2418 }
2419
2420 }
2421
2422 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2423 if (!sta)
2424 return -ENOLINK;
2425 break;
2426 default:
2427 return -EINVAL;
2428 }
2429
2430 *sta_out = sta ?: ERR_PTR(-ENOENT);
2431 return 0;
2432}
2433
2434static u16 ieee80211_store_ack_skb(struct ieee80211_local *local,
2435 struct sk_buff *skb,
2436 u32 *info_flags,
2437 u64 *cookie)
2438{
2439 struct sk_buff *ack_skb;
2440 u16 info_id = 0;
2441
2442 if (skb->sk)
2443 ack_skb = skb_clone_sk(skb);
2444 else
2445 ack_skb = skb_clone(skb, GFP_ATOMIC);
2446
2447 if (ack_skb) {
2448 unsigned long flags;
2449 int id;
2450
2451 spin_lock_irqsave(&local->ack_status_lock, flags);
2452 id = idr_alloc(&local->ack_status_frames, ack_skb,
2453 1, 0x2000, GFP_ATOMIC);
2454 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2455
2456 if (id >= 0) {
2457 info_id = id;
2458 *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2459 if (cookie) {
2460 *cookie = ieee80211_mgmt_tx_cookie(local);
2461 IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
2462 }
2463 } else {
2464 kfree_skb(ack_skb);
2465 }
2466 }
2467
2468 return info_id;
2469}
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2493 struct sk_buff *skb, u32 info_flags,
2494 struct sta_info *sta, u32 ctrl_flags,
2495 u64 *cookie)
2496{
2497 struct ieee80211_local *local = sdata->local;
2498 struct ieee80211_tx_info *info;
2499 int head_need;
2500 u16 ethertype, hdrlen, meshhdrlen = 0;
2501 __le16 fc;
2502 struct ieee80211_hdr hdr;
2503 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2504 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2505 const u8 *encaps_data;
2506 int encaps_len, skip_header_bytes;
2507 bool wme_sta = false, authorized = false;
2508 bool tdls_peer;
2509 bool multicast;
2510 u16 info_id = 0;
2511 struct ieee80211_chanctx_conf *chanctx_conf;
2512 struct ieee80211_sub_if_data *ap_sdata;
2513 enum nl80211_band band;
2514 int ret;
2515
2516 if (IS_ERR(sta))
2517 sta = NULL;
2518
2519#ifdef CONFIG_MAC80211_DEBUGFS
2520 if (local->force_tx_status)
2521 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2522#endif
2523
2524
2525
2526 ethertype = (skb->data[12] << 8) | skb->data[13];
2527 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2528
2529 switch (sdata->vif.type) {
2530 case NL80211_IFTYPE_AP_VLAN:
2531 if (sdata->wdev.use_4addr) {
2532 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2533
2534 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2535 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2536 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2537 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2538 hdrlen = 30;
2539 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2540 wme_sta = sta->sta.wme;
2541 }
2542 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2543 u.ap);
2544 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
2545 if (!chanctx_conf) {
2546 ret = -ENOTCONN;
2547 goto free;
2548 }
2549 band = chanctx_conf->def.chan->band;
2550 if (sdata->wdev.use_4addr)
2551 break;
2552 fallthrough;
2553 case NL80211_IFTYPE_AP:
2554 if (sdata->vif.type == NL80211_IFTYPE_AP)
2555 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2556 if (!chanctx_conf) {
2557 ret = -ENOTCONN;
2558 goto free;
2559 }
2560 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2561
2562 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2563 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2564 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2565 hdrlen = 24;
2566 band = chanctx_conf->def.chan->band;
2567 break;
2568#ifdef CONFIG_MAC80211_MESH
2569 case NL80211_IFTYPE_MESH_POINT:
2570 if (!is_multicast_ether_addr(skb->data)) {
2571 struct sta_info *next_hop;
2572 bool mpp_lookup = true;
2573
2574 mpath = mesh_path_lookup(sdata, skb->data);
2575 if (mpath) {
2576 mpp_lookup = false;
2577 next_hop = rcu_dereference(mpath->next_hop);
2578 if (!next_hop ||
2579 !(mpath->flags & (MESH_PATH_ACTIVE |
2580 MESH_PATH_RESOLVING)))
2581 mpp_lookup = true;
2582 }
2583
2584 if (mpp_lookup) {
2585 mppath = mpp_path_lookup(sdata, skb->data);
2586 if (mppath)
2587 mppath->exp_time = jiffies;
2588 }
2589
2590 if (mppath && mpath)
2591 mesh_path_del(sdata, mpath->dst);
2592 }
2593
2594
2595
2596
2597
2598
2599
2600 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2601 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
2602 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2603 skb->data, skb->data + ETH_ALEN);
2604 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2605 NULL, NULL);
2606 } else {
2607
2608
2609
2610
2611
2612
2613 const u8 *mesh_da = skb->data;
2614
2615 if (mppath)
2616 mesh_da = mppath->mpp;
2617 else if (mpath)
2618 mesh_da = mpath->dst;
2619
2620 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2621 mesh_da, sdata->vif.addr);
2622 if (is_multicast_ether_addr(mesh_da))
2623
2624 meshhdrlen = ieee80211_new_mesh_header(
2625 sdata, &mesh_hdr,
2626 skb->data + ETH_ALEN, NULL);
2627 else
2628
2629 meshhdrlen = ieee80211_new_mesh_header(
2630 sdata, &mesh_hdr, skb->data,
2631 skb->data + ETH_ALEN);
2632
2633 }
2634 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2635 if (!chanctx_conf) {
2636 ret = -ENOTCONN;
2637 goto free;
2638 }
2639 band = chanctx_conf->def.chan->band;
2640
2641
2642
2643
2644 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2645 is_zero_ether_addr(hdr.addr1))
2646 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2647 break;
2648#endif
2649 case NL80211_IFTYPE_STATION:
2650
2651 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
2652
2653 if (tdls_peer) {
2654
2655 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2656 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2657 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2658 hdrlen = 24;
2659 } else if (sdata->u.mgd.use_4addr &&
2660 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2661 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2662 IEEE80211_FCTL_TODS);
2663
2664 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2665 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2666 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2667 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2668 hdrlen = 30;
2669 } else {
2670 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2671
2672 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2673 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2674 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2675 hdrlen = 24;
2676 }
2677 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2678 if (!chanctx_conf) {
2679 ret = -ENOTCONN;
2680 goto free;
2681 }
2682 band = chanctx_conf->def.chan->band;
2683 break;
2684 case NL80211_IFTYPE_OCB:
2685
2686 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2687 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2688 eth_broadcast_addr(hdr.addr3);
2689 hdrlen = 24;
2690 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2691 if (!chanctx_conf) {
2692 ret = -ENOTCONN;
2693 goto free;
2694 }
2695 band = chanctx_conf->def.chan->band;
2696 break;
2697 case NL80211_IFTYPE_ADHOC:
2698
2699 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2700 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2701 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2702 hdrlen = 24;
2703 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2704 if (!chanctx_conf) {
2705 ret = -ENOTCONN;
2706 goto free;
2707 }
2708 band = chanctx_conf->def.chan->band;
2709 break;
2710 default:
2711 ret = -EINVAL;
2712 goto free;
2713 }
2714
2715 multicast = is_multicast_ether_addr(hdr.addr1);
2716
2717
2718 if (sta) {
2719 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2720 wme_sta = sta->sta.wme;
2721 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2722
2723 wme_sta = true;
2724 }
2725
2726
2727 if (wme_sta) {
2728 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2729 hdrlen += 2;
2730 }
2731
2732
2733
2734
2735
2736 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2737 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2738 !multicast && !authorized &&
2739 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2740 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
2741#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2742 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2743 sdata->name, hdr.addr1);
2744#endif
2745
2746 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2747
2748 ret = -EPERM;
2749 goto free;
2750 }
2751
2752 if (unlikely(!multicast && ((skb->sk &&
2753 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) ||
2754 ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS)))
2755 info_id = ieee80211_store_ack_skb(local, skb, &info_flags,
2756 cookie);
2757
2758
2759
2760
2761 if (skb_shared(skb)) {
2762 struct sk_buff *tmp_skb = skb;
2763
2764
2765 WARN_ON(info_id);
2766
2767 skb = skb_clone(skb, GFP_ATOMIC);
2768 kfree_skb(tmp_skb);
2769
2770 if (!skb) {
2771 ret = -ENOMEM;
2772 goto free;
2773 }
2774 }
2775
2776 hdr.frame_control = fc;
2777 hdr.duration_id = 0;
2778 hdr.seq_ctrl = 0;
2779
2780 skip_header_bytes = ETH_HLEN;
2781 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2782 encaps_data = bridge_tunnel_header;
2783 encaps_len = sizeof(bridge_tunnel_header);
2784 skip_header_bytes -= 2;
2785 } else if (ethertype >= ETH_P_802_3_MIN) {
2786 encaps_data = rfc1042_header;
2787 encaps_len = sizeof(rfc1042_header);
2788 skip_header_bytes -= 2;
2789 } else {
2790 encaps_data = NULL;
2791 encaps_len = 0;
2792 }
2793
2794 skb_pull(skb, skip_header_bytes);
2795 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809 if (head_need > 0 || skb_cloned(skb)) {
2810 head_need += sdata->encrypt_headroom;
2811 head_need += local->tx_headroom;
2812 head_need = max_t(int, 0, head_need);
2813 if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) {
2814 ieee80211_free_txskb(&local->hw, skb);
2815 skb = NULL;
2816 return ERR_PTR(-ENOMEM);
2817 }
2818 }
2819
2820 if (encaps_data)
2821 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2822
2823#ifdef CONFIG_MAC80211_MESH
2824 if (meshhdrlen > 0)
2825 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2826#endif
2827
2828 if (ieee80211_is_data_qos(fc)) {
2829 __le16 *qos_control;
2830
2831 qos_control = skb_push(skb, 2);
2832 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2833
2834
2835
2836
2837 *qos_control = 0;
2838 } else
2839 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2840
2841 skb_reset_mac_header(skb);
2842
2843 info = IEEE80211_SKB_CB(skb);
2844 memset(info, 0, sizeof(*info));
2845
2846 info->flags = info_flags;
2847 info->ack_frame_id = info_id;
2848 info->band = band;
2849 info->control.flags = ctrl_flags;
2850
2851 return skb;
2852 free:
2853 kfree_skb(skb);
2854 return ERR_PTR(ret);
2855}
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878void ieee80211_check_fast_xmit(struct sta_info *sta)
2879{
2880 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2881 struct ieee80211_local *local = sta->local;
2882 struct ieee80211_sub_if_data *sdata = sta->sdata;
2883 struct ieee80211_hdr *hdr = (void *)build.hdr;
2884 struct ieee80211_chanctx_conf *chanctx_conf;
2885 __le16 fc;
2886
2887 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
2888 return;
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902 spin_lock_bh(&sta->lock);
2903 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2904 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2905 sdata->vif.type == NL80211_IFTYPE_STATION)
2906 goto out;
2907
2908 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2909 goto out;
2910
2911 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2912 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2913 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2914 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
2915 goto out;
2916
2917 if (sdata->noack_map)
2918 goto out;
2919
2920
2921 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2922 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
2923 goto out;
2924
2925 rcu_read_lock();
2926 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2927 if (!chanctx_conf) {
2928 rcu_read_unlock();
2929 goto out;
2930 }
2931 build.band = chanctx_conf->def.chan->band;
2932 rcu_read_unlock();
2933
2934 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2935
2936 switch (sdata->vif.type) {
2937 case NL80211_IFTYPE_ADHOC:
2938
2939 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2940 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2941 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2942 build.hdr_len = 24;
2943 break;
2944 case NL80211_IFTYPE_STATION:
2945 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2946
2947 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2948 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2949 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2950 build.hdr_len = 24;
2951 break;
2952 }
2953
2954 if (sdata->u.mgd.use_4addr) {
2955
2956 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2957 IEEE80211_FCTL_TODS);
2958
2959 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2960 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2961 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2962 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2963 build.hdr_len = 30;
2964 break;
2965 }
2966 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2967
2968 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2969 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2970 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2971 build.hdr_len = 24;
2972 break;
2973 case NL80211_IFTYPE_AP_VLAN:
2974 if (sdata->wdev.use_4addr) {
2975 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2976 IEEE80211_FCTL_TODS);
2977
2978 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2979 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2980 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2981 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2982 build.hdr_len = 30;
2983 break;
2984 }
2985 fallthrough;
2986 case NL80211_IFTYPE_AP:
2987 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2988
2989 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2990 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2991 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2992 build.hdr_len = 24;
2993 break;
2994 default:
2995
2996 goto out;
2997 }
2998
2999 if (sta->sta.wme) {
3000 build.hdr_len += 2;
3001 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3002 }
3003
3004
3005
3006
3007
3008
3009 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3010 if (!build.key)
3011 build.key = rcu_access_pointer(sdata->default_unicast_key);
3012 if (build.key) {
3013 bool gen_iv, iv_spc, mmic;
3014
3015 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3016 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
3017 mmic = build.key->conf.flags &
3018 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3019 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3020
3021
3022 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3023 goto out;
3024
3025
3026 if (build.key->flags & KEY_FLAG_TAINTED)
3027 goto out;
3028
3029 switch (build.key->conf.cipher) {
3030 case WLAN_CIPHER_SUITE_CCMP:
3031 case WLAN_CIPHER_SUITE_CCMP_256:
3032 if (gen_iv)
3033 build.pn_offs = build.hdr_len;
3034 if (gen_iv || iv_spc)
3035 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3036 break;
3037 case WLAN_CIPHER_SUITE_GCMP:
3038 case WLAN_CIPHER_SUITE_GCMP_256:
3039 if (gen_iv)
3040 build.pn_offs = build.hdr_len;
3041 if (gen_iv || iv_spc)
3042 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3043 break;
3044 case WLAN_CIPHER_SUITE_TKIP:
3045
3046 if (mmic || gen_iv)
3047 goto out;
3048 if (iv_spc)
3049 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3050 break;
3051 case WLAN_CIPHER_SUITE_WEP40:
3052 case WLAN_CIPHER_SUITE_WEP104:
3053
3054 if (gen_iv)
3055 goto out;
3056 if (iv_spc)
3057 build.hdr_len += IEEE80211_WEP_IV_LEN;
3058 break;
3059 case WLAN_CIPHER_SUITE_AES_CMAC:
3060 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3061 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3062 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3063 WARN(1,
3064 "management cipher suite 0x%x enabled for data\n",
3065 build.key->conf.cipher);
3066 goto out;
3067 default:
3068
3069 if (WARN_ON(gen_iv))
3070 goto out;
3071
3072 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3073 break;
3074
3075 if (iv_spc &&
3076 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3077 goto out;
3078 if (iv_spc)
3079 build.hdr_len += build.key->conf.iv_len;
3080 }
3081
3082 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3083 }
3084
3085 hdr->frame_control = fc;
3086
3087 memcpy(build.hdr + build.hdr_len,
3088 rfc1042_header, sizeof(rfc1042_header));
3089 build.hdr_len += sizeof(rfc1042_header);
3090
3091 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3092
3093 if (!fast_tx)
3094 goto out;
3095
3096 out:
3097
3098 old = rcu_dereference_protected(sta->fast_tx,
3099 lockdep_is_held(&sta->lock));
3100 rcu_assign_pointer(sta->fast_tx, fast_tx);
3101 if (old)
3102 kfree_rcu(old, rcu_head);
3103 spin_unlock_bh(&sta->lock);
3104}
3105
3106void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3107{
3108 struct sta_info *sta;
3109
3110 rcu_read_lock();
3111 list_for_each_entry_rcu(sta, &local->sta_list, list)
3112 ieee80211_check_fast_xmit(sta);
3113 rcu_read_unlock();
3114}
3115
3116void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3117{
3118 struct ieee80211_local *local = sdata->local;
3119 struct sta_info *sta;
3120
3121 rcu_read_lock();
3122
3123 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3124 if (sdata != sta->sdata &&
3125 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3126 continue;
3127 ieee80211_check_fast_xmit(sta);
3128 }
3129
3130 rcu_read_unlock();
3131}
3132
3133void ieee80211_clear_fast_xmit(struct sta_info *sta)
3134{
3135 struct ieee80211_fast_tx *fast_tx;
3136
3137 spin_lock_bh(&sta->lock);
3138 fast_tx = rcu_dereference_protected(sta->fast_tx,
3139 lockdep_is_held(&sta->lock));
3140 RCU_INIT_POINTER(sta->fast_tx, NULL);
3141 spin_unlock_bh(&sta->lock);
3142
3143 if (fast_tx)
3144 kfree_rcu(fast_tx, rcu_head);
3145}
3146
3147static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3148 struct sk_buff *skb, int headroom)
3149{
3150 if (skb_headroom(skb) < headroom) {
3151 I802_DEBUG_INC(local->tx_expand_skb_head);
3152
3153 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
3154 wiphy_debug(local->hw.wiphy,
3155 "failed to reallocate TX buffer\n");
3156 return false;
3157 }
3158 }
3159
3160 return true;
3161}
3162
3163static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3164 struct ieee80211_fast_tx *fast_tx,
3165 struct sk_buff *skb)
3166{
3167 struct ieee80211_local *local = sdata->local;
3168 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3169 struct ieee80211_hdr *hdr;
3170 struct ethhdr *amsdu_hdr;
3171 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3172 int subframe_len = skb->len - hdr_len;
3173 void *data;
3174 u8 *qc, *h_80211_src, *h_80211_dst;
3175 const u8 *bssid;
3176
3177 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3178 return false;
3179
3180 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3181 return true;
3182
3183 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr)))
3184 return false;
3185
3186 data = skb_push(skb, sizeof(*amsdu_hdr));
3187 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3188 hdr = data;
3189 amsdu_hdr = data + hdr_len;
3190
3191 h_80211_src = data + fast_tx->sa_offs;
3192 h_80211_dst = data + fast_tx->da_offs;
3193
3194 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3195 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3196 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3197
3198
3199
3200
3201
3202 switch (sdata->vif.type) {
3203 case NL80211_IFTYPE_STATION:
3204 bssid = sdata->u.mgd.bssid;
3205 break;
3206 case NL80211_IFTYPE_AP:
3207 case NL80211_IFTYPE_AP_VLAN:
3208 bssid = sdata->vif.addr;
3209 break;
3210 default:
3211 bssid = NULL;
3212 }
3213
3214 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3215 ether_addr_copy(h_80211_src, bssid);
3216
3217 if (bssid && ieee80211_has_tods(hdr->frame_control))
3218 ether_addr_copy(h_80211_dst, bssid);
3219
3220 qc = ieee80211_get_qos_ctl(hdr);
3221 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3222
3223 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3224
3225 return true;
3226}
3227
3228static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3229 struct sta_info *sta,
3230 struct ieee80211_fast_tx *fast_tx,
3231 struct sk_buff *skb)
3232{
3233 struct ieee80211_local *local = sdata->local;
3234 struct fq *fq = &local->fq;
3235 struct fq_tin *tin;
3236 struct fq_flow *flow;
3237 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3238 struct ieee80211_txq *txq = sta->sta.txq[tid];
3239 struct txq_info *txqi;
3240 struct sk_buff **frag_tail, *head;
3241 int subframe_len = skb->len - ETH_ALEN;
3242 u8 max_subframes = sta->sta.max_amsdu_subframes;
3243 int max_frags = local->hw.max_tx_fragments;
3244 int max_amsdu_len = sta->sta.max_amsdu_len;
3245 int orig_truesize;
3246 u32 flow_idx;
3247 __be16 len;
3248 void *data;
3249 bool ret = false;
3250 unsigned int orig_len;
3251 int n = 2, nfrags, pad = 0;
3252 u16 hdrlen;
3253
3254 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3255 return false;
3256
3257 if (skb_is_gso(skb))
3258 return false;
3259
3260 if (!txq)
3261 return false;
3262
3263 txqi = to_txq_info(txq);
3264 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3265 return false;
3266
3267 if (sta->sta.max_rc_amsdu_len)
3268 max_amsdu_len = min_t(int, max_amsdu_len,
3269 sta->sta.max_rc_amsdu_len);
3270
3271 if (sta->sta.max_tid_amsdu_len[tid])
3272 max_amsdu_len = min_t(int, max_amsdu_len,
3273 sta->sta.max_tid_amsdu_len[tid]);
3274
3275 flow_idx = fq_flow_idx(fq, skb);
3276
3277 spin_lock_bh(&fq->lock);
3278
3279
3280
3281
3282
3283 tin = &txqi->tin;
3284 flow = fq_flow_classify(fq, tin, flow_idx, skb);
3285 head = skb_peek_tail(&flow->queue);
3286 if (!head || skb_is_gso(head))
3287 goto out;
3288
3289 orig_truesize = head->truesize;
3290 orig_len = head->len;
3291
3292 if (skb->len + head->len > max_amsdu_len)
3293 goto out;
3294
3295 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3296 nfrags += 1 + skb_shinfo(head)->nr_frags;
3297 frag_tail = &skb_shinfo(head)->frag_list;
3298 while (*frag_tail) {
3299 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3300 frag_tail = &(*frag_tail)->next;
3301 n++;
3302 }
3303
3304 if (max_subframes && n > max_subframes)
3305 goto out;
3306
3307 if (max_frags && nfrags > max_frags)
3308 goto out;
3309
3310 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3311 goto out;
3312
3313 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3314 goto out;
3315
3316
3317
3318
3319
3320
3321
3322
3323 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3324 if ((head->len - hdrlen) & 3)
3325 pad = 4 - ((head->len - hdrlen) & 3);
3326
3327 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
3328 2 + pad))
3329 goto out_recalc;
3330
3331 ret = true;
3332 data = skb_push(skb, ETH_ALEN + 2);
3333 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3334
3335 data += 2 * ETH_ALEN;
3336 len = cpu_to_be16(subframe_len);
3337 memcpy(data, &len, 2);
3338 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3339
3340 memset(skb_push(skb, pad), 0, pad);
3341
3342 head->len += skb->len;
3343 head->data_len += skb->len;
3344 *frag_tail = skb;
3345
3346out_recalc:
3347 fq->memory_usage += head->truesize - orig_truesize;
3348 if (head->len != orig_len) {
3349 flow->backlog += head->len - orig_len;
3350 tin->backlog_bytes += head->len - orig_len;
3351 }
3352out:
3353 spin_unlock_bh(&fq->lock);
3354
3355 return ret;
3356}
3357
3358
3359
3360
3361
3362static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3363 struct sta_info *sta, u8 pn_offs,
3364 struct ieee80211_key *key,
3365 struct sk_buff *skb)
3366{
3367 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3368 struct ieee80211_hdr *hdr = (void *)skb->data;
3369 u8 tid = IEEE80211_NUM_TIDS;
3370
3371 if (key)
3372 info->control.hw_key = &key->conf;
3373
3374 dev_sw_netstats_tx_add(skb->dev, 1, skb->len);
3375
3376 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3377 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3378 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3379 } else {
3380 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3381 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3382 sdata->sequence_number += 0x10;
3383 }
3384
3385 if (skb_shinfo(skb)->gso_size)
3386 sta->tx_stats.msdu[tid] +=
3387 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3388 else
3389 sta->tx_stats.msdu[tid]++;
3390
3391 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3392
3393
3394
3395
3396 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3397 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3398
3399 if (pn_offs) {
3400 u64 pn;
3401 u8 *crypto_hdr = skb->data + pn_offs;
3402
3403 switch (key->conf.cipher) {
3404 case WLAN_CIPHER_SUITE_CCMP:
3405 case WLAN_CIPHER_SUITE_CCMP_256:
3406 case WLAN_CIPHER_SUITE_GCMP:
3407 case WLAN_CIPHER_SUITE_GCMP_256:
3408 pn = atomic64_inc_return(&key->conf.tx_pn);
3409 crypto_hdr[0] = pn;
3410 crypto_hdr[1] = pn >> 8;
3411 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3412 crypto_hdr[4] = pn >> 16;
3413 crypto_hdr[5] = pn >> 24;
3414 crypto_hdr[6] = pn >> 32;
3415 crypto_hdr[7] = pn >> 40;
3416 break;
3417 }
3418 }
3419}
3420
3421static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3422 struct sta_info *sta,
3423 struct ieee80211_fast_tx *fast_tx,
3424 struct sk_buff *skb)
3425{
3426 struct ieee80211_local *local = sdata->local;
3427 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3428 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3429 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3430 struct ethhdr eth;
3431 struct ieee80211_tx_info *info;
3432 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3433 struct ieee80211_tx_data tx;
3434 ieee80211_tx_result r;
3435 struct tid_ampdu_tx *tid_tx = NULL;
3436 u8 tid = IEEE80211_NUM_TIDS;
3437
3438
3439 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3440 return false;
3441
3442
3443 if (ethertype < ETH_P_802_3_MIN)
3444 return false;
3445
3446
3447 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3448 return false;
3449
3450 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3451 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3452 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3453 if (tid_tx) {
3454 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3455 return false;
3456 if (tid_tx->timeout)
3457 tid_tx->last_tx = jiffies;
3458 }
3459 }
3460
3461
3462
3463 if (skb_shared(skb)) {
3464 struct sk_buff *tmp_skb = skb;
3465
3466 skb = skb_clone(skb, GFP_ATOMIC);
3467 kfree_skb(tmp_skb);
3468
3469 if (!skb)
3470 return true;
3471 }
3472
3473 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3474 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3475 return true;
3476
3477
3478
3479
3480
3481 if (unlikely(ieee80211_skb_resize(sdata, skb,
3482 max_t(int, extra_head + hw_headroom -
3483 skb_headroom(skb), 0),
3484 ENCRYPT_NO))) {
3485 kfree_skb(skb);
3486 return true;
3487 }
3488
3489 memcpy(ð, skb->data, ETH_HLEN - 2);
3490 hdr = skb_push(skb, extra_head);
3491 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3492 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3493 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3494
3495 info = IEEE80211_SKB_CB(skb);
3496 memset(info, 0, sizeof(*info));
3497 info->band = fast_tx->band;
3498 info->control.vif = &sdata->vif;
3499 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3500 IEEE80211_TX_CTL_DONTFRAG |
3501 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3502 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
3503
3504#ifdef CONFIG_MAC80211_DEBUGFS
3505 if (local->force_tx_status)
3506 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3507#endif
3508
3509 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3510 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3511 *ieee80211_get_qos_ctl(hdr) = tid;
3512 }
3513
3514 __skb_queue_head_init(&tx.skbs);
3515
3516 tx.flags = IEEE80211_TX_UNICAST;
3517 tx.local = local;
3518 tx.sdata = sdata;
3519 tx.sta = sta;
3520 tx.key = fast_tx->key;
3521
3522 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3523 tx.skb = skb;
3524 r = ieee80211_tx_h_rate_ctrl(&tx);
3525 skb = tx.skb;
3526 tx.skb = NULL;
3527
3528 if (r != TX_CONTINUE) {
3529 if (r != TX_QUEUED)
3530 kfree_skb(skb);
3531 return true;
3532 }
3533 }
3534
3535 if (ieee80211_queue_skb(local, sdata, sta, skb))
3536 return true;
3537
3538 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3539 fast_tx->key, skb);
3540
3541 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3542 sdata = container_of(sdata->bss,
3543 struct ieee80211_sub_if_data, u.ap);
3544
3545 __skb_queue_tail(&tx.skbs, skb);
3546 ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false);
3547 return true;
3548}
3549
3550struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3551 struct ieee80211_txq *txq)
3552{
3553 struct ieee80211_local *local = hw_to_local(hw);
3554 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3555 struct ieee80211_hdr *hdr;
3556 struct sk_buff *skb = NULL;
3557 struct fq *fq = &local->fq;
3558 struct fq_tin *tin = &txqi->tin;
3559 struct ieee80211_tx_info *info;
3560 struct ieee80211_tx_data tx;
3561 ieee80211_tx_result r;
3562 struct ieee80211_vif *vif = txq->vif;
3563
3564 WARN_ON_ONCE(softirq_count() == 0);
3565
3566 if (!ieee80211_txq_airtime_check(hw, txq))
3567 return NULL;
3568
3569begin:
3570 spin_lock_bh(&fq->lock);
3571
3572 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) ||
3573 test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags))
3574 goto out;
3575
3576 if (vif->txqs_stopped[txq->ac]) {
3577 set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags);
3578 goto out;
3579 }
3580
3581
3582 skb = __skb_dequeue(&txqi->frags);
3583 if (skb)
3584 goto out;
3585
3586 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3587 if (!skb)
3588 goto out;
3589
3590 spin_unlock_bh(&fq->lock);
3591
3592 hdr = (struct ieee80211_hdr *)skb->data;
3593 info = IEEE80211_SKB_CB(skb);
3594
3595 memset(&tx, 0, sizeof(tx));
3596 __skb_queue_head_init(&tx.skbs);
3597 tx.local = local;
3598 tx.skb = skb;
3599 tx.sdata = vif_to_sdata(info->control.vif);
3600
3601 if (txq->sta) {
3602 tx.sta = container_of(txq->sta, struct sta_info, sta);
3603
3604
3605
3606
3607 if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
3608 ieee80211_is_data(hdr->frame_control) &&
3609 !ieee80211_vif_is_mesh(&tx.sdata->vif) &&
3610 tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3611 !is_multicast_ether_addr(hdr->addr1) &&
3612 !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3613 (!(info->control.flags &
3614 IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3615 !ether_addr_equal(tx.sdata->vif.addr,
3616 hdr->addr2)))) {
3617 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3618 ieee80211_free_txskb(&local->hw, skb);
3619 goto begin;
3620 }
3621 }
3622
3623
3624
3625
3626
3627 r = ieee80211_tx_h_select_key(&tx);
3628 if (r != TX_CONTINUE) {
3629 ieee80211_free_txskb(&local->hw, skb);
3630 goto begin;
3631 }
3632
3633 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3634 info->flags |= IEEE80211_TX_CTL_AMPDU;
3635 else
3636 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3637
3638 if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)
3639 goto encap_out;
3640
3641 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3642 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3643 sta);
3644 u8 pn_offs = 0;
3645
3646 if (tx.key &&
3647 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3648 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3649
3650 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3651 tx.key, skb);
3652 } else {
3653 if (invoke_tx_handlers_late(&tx))
3654 goto begin;
3655
3656 skb = __skb_dequeue(&tx.skbs);
3657
3658 if (!skb_queue_empty(&tx.skbs)) {
3659 spin_lock_bh(&fq->lock);
3660 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
3661 spin_unlock_bh(&fq->lock);
3662 }
3663 }
3664
3665 if (skb_has_frag_list(skb) &&
3666 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3667 if (skb_linearize(skb)) {
3668 ieee80211_free_txskb(&local->hw, skb);
3669 goto begin;
3670 }
3671 }
3672
3673 switch (tx.sdata->vif.type) {
3674 case NL80211_IFTYPE_MONITOR:
3675 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3676 vif = &tx.sdata->vif;
3677 break;
3678 }
3679 tx.sdata = rcu_dereference(local->monitor_sdata);
3680 if (tx.sdata) {
3681 vif = &tx.sdata->vif;
3682 info->hw_queue =
3683 vif->hw_queue[skb_get_queue_mapping(skb)];
3684 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3685 ieee80211_free_txskb(&local->hw, skb);
3686 goto begin;
3687 } else {
3688 vif = NULL;
3689 }
3690 break;
3691 case NL80211_IFTYPE_AP_VLAN:
3692 tx.sdata = container_of(tx.sdata->bss,
3693 struct ieee80211_sub_if_data, u.ap);
3694 fallthrough;
3695 default:
3696 vif = &tx.sdata->vif;
3697 break;
3698 }
3699
3700encap_out:
3701 IEEE80211_SKB_CB(skb)->control.vif = vif;
3702
3703 if (vif &&
3704 wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) {
3705 bool ampdu = txq->ac != IEEE80211_AC_VO;
3706 u32 airtime;
3707
3708 airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta,
3709 skb->len, ampdu);
3710 if (airtime) {
3711 airtime = ieee80211_info_set_tx_time_est(info, airtime);
3712 ieee80211_sta_update_pending_airtime(local, tx.sta,
3713 txq->ac,
3714 airtime,
3715 false);
3716 }
3717 }
3718
3719 return skb;
3720
3721out:
3722 spin_unlock_bh(&fq->lock);
3723
3724 return skb;
3725}
3726EXPORT_SYMBOL(ieee80211_tx_dequeue);
3727
3728struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
3729{
3730 struct ieee80211_local *local = hw_to_local(hw);
3731 struct ieee80211_txq *ret = NULL;
3732 struct txq_info *txqi = NULL, *head = NULL;
3733 bool found_eligible_txq = false;
3734
3735 spin_lock_bh(&local->active_txq_lock[ac]);
3736
3737 begin:
3738 txqi = list_first_entry_or_null(&local->active_txqs[ac],
3739 struct txq_info,
3740 schedule_order);
3741 if (!txqi)
3742 goto out;
3743
3744 if (txqi == head) {
3745 if (!found_eligible_txq)
3746 goto out;
3747 else
3748 found_eligible_txq = false;
3749 }
3750
3751 if (!head)
3752 head = txqi;
3753
3754 if (txqi->txq.sta) {
3755 struct sta_info *sta = container_of(txqi->txq.sta,
3756 struct sta_info, sta);
3757 bool aql_check = ieee80211_txq_airtime_check(hw, &txqi->txq);
3758 s64 deficit = sta->airtime[txqi->txq.ac].deficit;
3759
3760 if (aql_check)
3761 found_eligible_txq = true;
3762
3763 if (deficit < 0)
3764 sta->airtime[txqi->txq.ac].deficit +=
3765 sta->airtime_weight;
3766
3767 if (deficit < 0 || !aql_check) {
3768 list_move_tail(&txqi->schedule_order,
3769 &local->active_txqs[txqi->txq.ac]);
3770 goto begin;
3771 }
3772 }
3773
3774
3775 if (txqi->schedule_round == local->schedule_round[ac])
3776 goto out;
3777
3778 list_del_init(&txqi->schedule_order);
3779 txqi->schedule_round = local->schedule_round[ac];
3780 ret = &txqi->txq;
3781
3782out:
3783 spin_unlock_bh(&local->active_txq_lock[ac]);
3784 return ret;
3785}
3786EXPORT_SYMBOL(ieee80211_next_txq);
3787
3788void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
3789 struct ieee80211_txq *txq,
3790 bool force)
3791{
3792 struct ieee80211_local *local = hw_to_local(hw);
3793 struct txq_info *txqi = to_txq_info(txq);
3794
3795 spin_lock_bh(&local->active_txq_lock[txq->ac]);
3796
3797 if (list_empty(&txqi->schedule_order) &&
3798 (force || !skb_queue_empty(&txqi->frags) ||
3799 txqi->tin.backlog_packets)) {
3800
3801
3802
3803
3804
3805
3806
3807 if (txqi->txq.sta && local->airtime_flags &&
3808 wiphy_ext_feature_isset(local->hw.wiphy,
3809 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
3810 list_add(&txqi->schedule_order,
3811 &local->active_txqs[txq->ac]);
3812 else
3813 list_add_tail(&txqi->schedule_order,
3814 &local->active_txqs[txq->ac]);
3815 }
3816
3817 spin_unlock_bh(&local->active_txq_lock[txq->ac]);
3818}
3819EXPORT_SYMBOL(__ieee80211_schedule_txq);
3820
3821DEFINE_STATIC_KEY_FALSE(aql_disable);
3822
3823bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
3824 struct ieee80211_txq *txq)
3825{
3826 struct sta_info *sta;
3827 struct ieee80211_local *local = hw_to_local(hw);
3828
3829 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
3830 return true;
3831
3832 if (static_branch_unlikely(&aql_disable))
3833 return true;
3834
3835 if (!txq->sta)
3836 return true;
3837
3838 sta = container_of(txq->sta, struct sta_info, sta);
3839 if (atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
3840 sta->airtime[txq->ac].aql_limit_low)
3841 return true;
3842
3843 if (atomic_read(&local->aql_total_pending_airtime) <
3844 local->aql_threshold &&
3845 atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
3846 sta->airtime[txq->ac].aql_limit_high)
3847 return true;
3848
3849 return false;
3850}
3851EXPORT_SYMBOL(ieee80211_txq_airtime_check);
3852
3853bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
3854 struct ieee80211_txq *txq)
3855{
3856 struct ieee80211_local *local = hw_to_local(hw);
3857 struct txq_info *iter, *tmp, *txqi = to_txq_info(txq);
3858 struct sta_info *sta;
3859 u8 ac = txq->ac;
3860
3861 spin_lock_bh(&local->active_txq_lock[ac]);
3862
3863 if (!txqi->txq.sta)
3864 goto out;
3865
3866 if (list_empty(&txqi->schedule_order))
3867 goto out;
3868
3869 list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac],
3870 schedule_order) {
3871 if (iter == txqi)
3872 break;
3873
3874 if (!iter->txq.sta) {
3875 list_move_tail(&iter->schedule_order,
3876 &local->active_txqs[ac]);
3877 continue;
3878 }
3879 sta = container_of(iter->txq.sta, struct sta_info, sta);
3880 if (sta->airtime[ac].deficit < 0)
3881 sta->airtime[ac].deficit += sta->airtime_weight;
3882 list_move_tail(&iter->schedule_order, &local->active_txqs[ac]);
3883 }
3884
3885 sta = container_of(txqi->txq.sta, struct sta_info, sta);
3886 if (sta->airtime[ac].deficit >= 0)
3887 goto out;
3888
3889 sta->airtime[ac].deficit += sta->airtime_weight;
3890 list_move_tail(&txqi->schedule_order, &local->active_txqs[ac]);
3891 spin_unlock_bh(&local->active_txq_lock[ac]);
3892
3893 return false;
3894out:
3895 if (!list_empty(&txqi->schedule_order))
3896 list_del_init(&txqi->schedule_order);
3897 spin_unlock_bh(&local->active_txq_lock[ac]);
3898
3899 return true;
3900}
3901EXPORT_SYMBOL(ieee80211_txq_may_transmit);
3902
3903void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
3904{
3905 struct ieee80211_local *local = hw_to_local(hw);
3906
3907 spin_lock_bh(&local->active_txq_lock[ac]);
3908 local->schedule_round[ac]++;
3909 spin_unlock_bh(&local->active_txq_lock[ac]);
3910}
3911EXPORT_SYMBOL(ieee80211_txq_schedule_start);
3912
3913void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3914 struct net_device *dev,
3915 u32 info_flags,
3916 u32 ctrl_flags,
3917 u64 *cookie)
3918{
3919 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3920 struct ieee80211_local *local = sdata->local;
3921 struct sta_info *sta;
3922 struct sk_buff *next;
3923
3924 if (unlikely(skb->len < ETH_HLEN)) {
3925 kfree_skb(skb);
3926 return;
3927 }
3928
3929 rcu_read_lock();
3930
3931 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3932 goto out_free;
3933
3934 if (IS_ERR(sta))
3935 sta = NULL;
3936
3937 if (local->ops->wake_tx_queue) {
3938 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
3939 skb_set_queue_mapping(skb, queue);
3940 skb_get_hash(skb);
3941 }
3942
3943 if (sta) {
3944 struct ieee80211_fast_tx *fast_tx;
3945
3946 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
3947
3948 fast_tx = rcu_dereference(sta->fast_tx);
3949
3950 if (fast_tx &&
3951 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
3952 goto out;
3953 }
3954
3955 if (skb_is_gso(skb)) {
3956 struct sk_buff *segs;
3957
3958 segs = skb_gso_segment(skb, 0);
3959 if (IS_ERR(segs)) {
3960 goto out_free;
3961 } else if (segs) {
3962 consume_skb(skb);
3963 skb = segs;
3964 }
3965 } else {
3966
3967 if (skb_linearize(skb)) {
3968 kfree_skb(skb);
3969 goto out;
3970 }
3971
3972
3973
3974
3975
3976 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3977 skb_set_transport_header(skb,
3978 skb_checksum_start_offset(skb));
3979 if (skb_checksum_help(skb))
3980 goto out_free;
3981 }
3982 }
3983
3984 skb_list_walk_safe(skb, skb, next) {
3985 skb_mark_not_on_list(skb);
3986
3987 if (skb->protocol == sdata->control_port_protocol)
3988 ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
3989
3990 skb = ieee80211_build_hdr(sdata, skb, info_flags,
3991 sta, ctrl_flags, cookie);
3992 if (IS_ERR(skb)) {
3993 kfree_skb_list(next);
3994 goto out;
3995 }
3996
3997 dev_sw_netstats_tx_add(dev, 1, skb->len);
3998
3999 ieee80211_xmit(sdata, sta, skb);
4000 }
4001 goto out;
4002 out_free:
4003 kfree_skb(skb);
4004 out:
4005 rcu_read_unlock();
4006}
4007
4008static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
4009{
4010 struct ethhdr *eth;
4011 int err;
4012
4013 err = skb_ensure_writable(skb, ETH_HLEN);
4014 if (unlikely(err))
4015 return err;
4016
4017 eth = (void *)skb->data;
4018 ether_addr_copy(eth->h_dest, sta->sta.addr);
4019
4020 return 0;
4021}
4022
4023static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
4024 struct net_device *dev)
4025{
4026 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4027 const struct ethhdr *eth = (void *)skb->data;
4028 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
4029 __be16 ethertype;
4030
4031 if (likely(!is_multicast_ether_addr(eth->h_dest)))
4032 return false;
4033
4034 switch (sdata->vif.type) {
4035 case NL80211_IFTYPE_AP_VLAN:
4036 if (sdata->u.vlan.sta)
4037 return false;
4038 if (sdata->wdev.use_4addr)
4039 return false;
4040 fallthrough;
4041 case NL80211_IFTYPE_AP:
4042
4043 if (!sdata->bss->multicast_to_unicast)
4044 return false;
4045 break;
4046 default:
4047 return false;
4048 }
4049
4050
4051 ethertype = eth->h_proto;
4052 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4053 ethertype = ethvlan->h_vlan_encapsulated_proto;
4054 switch (ethertype) {
4055 case htons(ETH_P_ARP):
4056 case htons(ETH_P_IP):
4057 case htons(ETH_P_IPV6):
4058 break;
4059 default:
4060 return false;
4061 }
4062
4063 return true;
4064}
4065
4066static void
4067ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4068 struct sk_buff_head *queue)
4069{
4070 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4071 struct ieee80211_local *local = sdata->local;
4072 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4073 struct sta_info *sta, *first = NULL;
4074 struct sk_buff *cloned_skb;
4075
4076 rcu_read_lock();
4077
4078 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4079 if (sdata != sta->sdata)
4080
4081 continue;
4082 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4083
4084 continue;
4085 if (!first) {
4086 first = sta;
4087 continue;
4088 }
4089 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4090 if (!cloned_skb)
4091 goto multicast;
4092 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4093 dev_kfree_skb(cloned_skb);
4094 goto multicast;
4095 }
4096 __skb_queue_tail(queue, cloned_skb);
4097 }
4098
4099 if (likely(first)) {
4100 if (unlikely(ieee80211_change_da(skb, first)))
4101 goto multicast;
4102 __skb_queue_tail(queue, skb);
4103 } else {
4104
4105 kfree_skb(skb);
4106 skb = NULL;
4107 }
4108
4109 goto out;
4110multicast:
4111 __skb_queue_purge(queue);
4112 __skb_queue_tail(queue, skb);
4113out:
4114 rcu_read_unlock();
4115}
4116
4117
4118
4119
4120
4121
4122
4123
4124netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4125 struct net_device *dev)
4126{
4127 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4128 struct sk_buff_head queue;
4129
4130 __skb_queue_head_init(&queue);
4131 ieee80211_convert_to_unicast(skb, dev, &queue);
4132 while ((skb = __skb_dequeue(&queue)))
4133 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4134 } else {
4135 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4136 }
4137
4138 return NETDEV_TX_OK;
4139}
4140
4141static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4142 struct sk_buff *skb, int led_len,
4143 struct sta_info *sta,
4144 bool txpending)
4145{
4146 struct ieee80211_local *local = sdata->local;
4147 struct ieee80211_tx_control control = {};
4148 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4149 struct ieee80211_sta *pubsta = NULL;
4150 unsigned long flags;
4151 int q = info->hw_queue;
4152
4153 if (ieee80211_queue_skb(local, sdata, sta, skb))
4154 return true;
4155
4156 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4157
4158 if (local->queue_stop_reasons[q] ||
4159 (!txpending && !skb_queue_empty(&local->pending[q]))) {
4160 if (txpending)
4161 skb_queue_head(&local->pending[q], skb);
4162 else
4163 skb_queue_tail(&local->pending[q], skb);
4164
4165 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4166
4167 return false;
4168 }
4169
4170 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4171
4172 if (sta && sta->uploaded)
4173 pubsta = &sta->sta;
4174
4175 control.sta = pubsta;
4176
4177 drv_tx(local, &control, skb);
4178
4179 return true;
4180}
4181
4182static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
4183 struct net_device *dev, struct sta_info *sta,
4184 struct ieee80211_key *key, struct sk_buff *skb)
4185{
4186 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4187 struct ieee80211_local *local = sdata->local;
4188 struct tid_ampdu_tx *tid_tx;
4189 u8 tid;
4190
4191 if (local->ops->wake_tx_queue) {
4192 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4193 skb_set_queue_mapping(skb, queue);
4194 skb_get_hash(skb);
4195 }
4196
4197 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) &&
4198 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
4199 goto out_free;
4200
4201 memset(info, 0, sizeof(*info));
4202
4203 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
4204 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
4205 if (tid_tx) {
4206 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
4207
4208 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4209 return;
4210 }
4211
4212 info->flags |= IEEE80211_TX_CTL_AMPDU;
4213 if (tid_tx->timeout)
4214 tid_tx->last_tx = jiffies;
4215 }
4216
4217 if (unlikely(skb->sk &&
4218 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS))
4219 info->ack_frame_id = ieee80211_store_ack_skb(local, skb,
4220 &info->flags, NULL);
4221
4222 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
4223
4224 dev_sw_netstats_tx_add(dev, 1, skb->len);
4225
4226 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
4227 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
4228
4229 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4230 sdata = container_of(sdata->bss,
4231 struct ieee80211_sub_if_data, u.ap);
4232
4233 info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP;
4234 info->control.vif = &sdata->vif;
4235
4236 if (key)
4237 info->control.hw_key = &key->conf;
4238
4239 ieee80211_tx_8023(sdata, skb, skb->len, sta, false);
4240
4241 return;
4242
4243out_free:
4244 kfree_skb(skb);
4245}
4246
4247netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
4248 struct net_device *dev)
4249{
4250 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4251 struct ethhdr *ehdr = (struct ethhdr *)skb->data;
4252 struct ieee80211_key *key;
4253 struct sta_info *sta;
4254
4255 if (unlikely(skb->len < ETH_HLEN)) {
4256 kfree_skb(skb);
4257 return NETDEV_TX_OK;
4258 }
4259
4260 rcu_read_lock();
4261
4262 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4263 kfree_skb(skb);
4264 goto out;
4265 }
4266
4267 if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded ||
4268 !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
4269 sdata->control_port_protocol == ehdr->h_proto))
4270 goto skip_offload;
4271
4272 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4273 if (!key)
4274 key = rcu_dereference(sdata->default_unicast_key);
4275
4276 if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) ||
4277 key->conf.cipher == WLAN_CIPHER_SUITE_TKIP))
4278 goto skip_offload;
4279
4280 ieee80211_8023_xmit(sdata, dev, sta, key, skb);
4281 goto out;
4282
4283skip_offload:
4284 ieee80211_subif_start_xmit(skb, dev);
4285out:
4286 rcu_read_unlock();
4287
4288 return NETDEV_TX_OK;
4289}
4290
4291struct sk_buff *
4292ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4293 struct sk_buff *skb, u32 info_flags)
4294{
4295 struct ieee80211_hdr *hdr;
4296 struct ieee80211_tx_data tx = {
4297 .local = sdata->local,
4298 .sdata = sdata,
4299 };
4300 struct sta_info *sta;
4301
4302 rcu_read_lock();
4303
4304 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4305 kfree_skb(skb);
4306 skb = ERR_PTR(-EINVAL);
4307 goto out;
4308 }
4309
4310 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0, NULL);
4311 if (IS_ERR(skb))
4312 goto out;
4313
4314 hdr = (void *)skb->data;
4315 tx.sta = sta_info_get(sdata, hdr->addr1);
4316 tx.skb = skb;
4317
4318 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4319 rcu_read_unlock();
4320 kfree_skb(skb);
4321 return ERR_PTR(-EINVAL);
4322 }
4323
4324out:
4325 rcu_read_unlock();
4326 return skb;
4327}
4328
4329
4330
4331
4332
4333void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4334{
4335 struct sk_buff *skb;
4336 int i;
4337
4338 for (i = 0; i < local->hw.queues; i++) {
4339 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4340 ieee80211_free_txskb(&local->hw, skb);
4341 }
4342}
4343
4344
4345
4346
4347
4348
4349static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4350 struct sk_buff *skb)
4351{
4352 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4353 struct ieee80211_sub_if_data *sdata;
4354 struct sta_info *sta;
4355 struct ieee80211_hdr *hdr;
4356 bool result;
4357 struct ieee80211_chanctx_conf *chanctx_conf;
4358
4359 sdata = vif_to_sdata(info->control.vif);
4360
4361 if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) {
4362 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4363 if (unlikely(!chanctx_conf)) {
4364 dev_kfree_skb(skb);
4365 return true;
4366 }
4367 info->band = chanctx_conf->def.chan->band;
4368 result = ieee80211_tx(sdata, NULL, skb, true);
4369 } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
4370 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4371 dev_kfree_skb(skb);
4372 return true;
4373 }
4374
4375 if (IS_ERR(sta) || (sta && !sta->uploaded))
4376 sta = NULL;
4377
4378 result = ieee80211_tx_8023(sdata, skb, skb->len, sta, true);
4379 } else {
4380 struct sk_buff_head skbs;
4381
4382 __skb_queue_head_init(&skbs);
4383 __skb_queue_tail(&skbs, skb);
4384
4385 hdr = (struct ieee80211_hdr *)skb->data;
4386 sta = sta_info_get(sdata, hdr->addr1);
4387
4388 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
4389 }
4390
4391 return result;
4392}
4393
4394
4395
4396
4397void ieee80211_tx_pending(struct tasklet_struct *t)
4398{
4399 struct ieee80211_local *local = from_tasklet(local, t,
4400 tx_pending_tasklet);
4401 unsigned long flags;
4402 int i;
4403 bool txok;
4404
4405 rcu_read_lock();
4406
4407 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4408 for (i = 0; i < local->hw.queues; i++) {
4409
4410
4411
4412
4413 if (local->queue_stop_reasons[i] ||
4414 skb_queue_empty(&local->pending[i]))
4415 continue;
4416
4417 while (!skb_queue_empty(&local->pending[i])) {
4418 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
4419 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4420
4421 if (WARN_ON(!info->control.vif)) {
4422 ieee80211_free_txskb(&local->hw, skb);
4423 continue;
4424 }
4425
4426 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4427 flags);
4428
4429 txok = ieee80211_tx_pending_skb(local, skb);
4430 spin_lock_irqsave(&local->queue_stop_reason_lock,
4431 flags);
4432 if (!txok)
4433 break;
4434 }
4435
4436 if (skb_queue_empty(&local->pending[i]))
4437 ieee80211_propagate_queue_wake(local, i);
4438 }
4439 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4440
4441 rcu_read_unlock();
4442}
4443
4444
4445
4446static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4447 struct ps_data *ps, struct sk_buff *skb,
4448 bool is_template)
4449{
4450 u8 *pos, *tim;
4451 int aid0 = 0;
4452 int i, have_bits = 0, n1, n2;
4453
4454
4455
4456 if (atomic_read(&ps->num_sta_ps) > 0)
4457
4458
4459 have_bits = !bitmap_empty((unsigned long *)ps->tim,
4460 IEEE80211_MAX_AID+1);
4461 if (!is_template) {
4462 if (ps->dtim_count == 0)
4463 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
4464 else
4465 ps->dtim_count--;
4466 }
4467
4468 tim = pos = skb_put(skb, 6);
4469 *pos++ = WLAN_EID_TIM;
4470 *pos++ = 4;
4471 *pos++ = ps->dtim_count;
4472 *pos++ = sdata->vif.bss_conf.dtim_period;
4473
4474 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
4475 aid0 = 1;
4476
4477 ps->dtim_bc_mc = aid0 == 1;
4478
4479 if (have_bits) {
4480
4481
4482
4483 n1 = 0;
4484 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4485 if (ps->tim[i]) {
4486 n1 = i & 0xfe;
4487 break;
4488 }
4489 }
4490 n2 = n1;
4491 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4492 if (ps->tim[i]) {
4493 n2 = i;
4494 break;
4495 }
4496 }
4497
4498
4499 *pos++ = n1 | aid0;
4500
4501 skb_put(skb, n2 - n1);
4502 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
4503
4504 tim[1] = n2 - n1 + 4;
4505 } else {
4506 *pos++ = aid0;
4507 *pos++ = 0;
4508 }
4509}
4510
4511static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4512 struct ps_data *ps, struct sk_buff *skb,
4513 bool is_template)
4514{
4515 struct ieee80211_local *local = sdata->local;
4516
4517
4518
4519
4520
4521
4522
4523
4524 if (local->tim_in_locked_section) {
4525 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4526 } else {
4527 spin_lock_bh(&local->tim_lock);
4528 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4529 spin_unlock_bh(&local->tim_lock);
4530 }
4531
4532 return 0;
4533}
4534
4535static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
4536 struct beacon_data *beacon)
4537{
4538 struct probe_resp *resp;
4539 u8 *beacon_data;
4540 size_t beacon_data_len;
4541 int i;
4542 u8 count = beacon->cntdwn_current_counter;
4543
4544 switch (sdata->vif.type) {
4545 case NL80211_IFTYPE_AP:
4546 beacon_data = beacon->tail;
4547 beacon_data_len = beacon->tail_len;
4548 break;
4549 case NL80211_IFTYPE_ADHOC:
4550 beacon_data = beacon->head;
4551 beacon_data_len = beacon->head_len;
4552 break;
4553 case NL80211_IFTYPE_MESH_POINT:
4554 beacon_data = beacon->head;
4555 beacon_data_len = beacon->head_len;
4556 break;
4557 default:
4558 return;
4559 }
4560
4561 rcu_read_lock();
4562 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; ++i) {
4563 resp = rcu_dereference(sdata->u.ap.probe_resp);
4564
4565 if (beacon->cntdwn_counter_offsets[i]) {
4566 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[i] >=
4567 beacon_data_len)) {
4568 rcu_read_unlock();
4569 return;
4570 }
4571
4572 beacon_data[beacon->cntdwn_counter_offsets[i]] = count;
4573 }
4574
4575 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4576 resp->data[resp->cntdwn_counter_offsets[i]] = count;
4577 }
4578 rcu_read_unlock();
4579}
4580
4581static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon)
4582{
4583 beacon->cntdwn_current_counter--;
4584
4585
4586 WARN_ON_ONCE(!beacon->cntdwn_current_counter);
4587
4588 return beacon->cntdwn_current_counter;
4589}
4590
4591u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif)
4592{
4593 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4594 struct beacon_data *beacon = NULL;
4595 u8 count = 0;
4596
4597 rcu_read_lock();
4598
4599 if (sdata->vif.type == NL80211_IFTYPE_AP)
4600 beacon = rcu_dereference(sdata->u.ap.beacon);
4601 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4602 beacon = rcu_dereference(sdata->u.ibss.presp);
4603 else if (ieee80211_vif_is_mesh(&sdata->vif))
4604 beacon = rcu_dereference(sdata->u.mesh.beacon);
4605
4606 if (!beacon)
4607 goto unlock;
4608
4609 count = __ieee80211_beacon_update_cntdwn(beacon);
4610
4611unlock:
4612 rcu_read_unlock();
4613 return count;
4614}
4615EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
4616
4617void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
4618{
4619 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4620 struct beacon_data *beacon = NULL;
4621
4622 rcu_read_lock();
4623
4624 if (sdata->vif.type == NL80211_IFTYPE_AP)
4625 beacon = rcu_dereference(sdata->u.ap.beacon);
4626 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4627 beacon = rcu_dereference(sdata->u.ibss.presp);
4628 else if (ieee80211_vif_is_mesh(&sdata->vif))
4629 beacon = rcu_dereference(sdata->u.mesh.beacon);
4630
4631 if (!beacon)
4632 goto unlock;
4633
4634 if (counter < beacon->cntdwn_current_counter)
4635 beacon->cntdwn_current_counter = counter;
4636
4637unlock:
4638 rcu_read_unlock();
4639}
4640EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
4641
4642bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif)
4643{
4644 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4645 struct beacon_data *beacon = NULL;
4646 u8 *beacon_data;
4647 size_t beacon_data_len;
4648 int ret = false;
4649
4650 if (!ieee80211_sdata_running(sdata))
4651 return false;
4652
4653 rcu_read_lock();
4654 if (vif->type == NL80211_IFTYPE_AP) {
4655 struct ieee80211_if_ap *ap = &sdata->u.ap;
4656
4657 beacon = rcu_dereference(ap->beacon);
4658 if (WARN_ON(!beacon || !beacon->tail))
4659 goto out;
4660 beacon_data = beacon->tail;
4661 beacon_data_len = beacon->tail_len;
4662 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4663 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4664
4665 beacon = rcu_dereference(ifibss->presp);
4666 if (!beacon)
4667 goto out;
4668
4669 beacon_data = beacon->head;
4670 beacon_data_len = beacon->head_len;
4671 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4672 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4673
4674 beacon = rcu_dereference(ifmsh->beacon);
4675 if (!beacon)
4676 goto out;
4677
4678 beacon_data = beacon->head;
4679 beacon_data_len = beacon->head_len;
4680 } else {
4681 WARN_ON(1);
4682 goto out;
4683 }
4684
4685 if (!beacon->cntdwn_counter_offsets[0])
4686 goto out;
4687
4688 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
4689 goto out;
4690
4691 if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
4692 ret = true;
4693
4694 out:
4695 rcu_read_unlock();
4696
4697 return ret;
4698}
4699EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
4700
4701static int ieee80211_beacon_protect(struct sk_buff *skb,
4702 struct ieee80211_local *local,
4703 struct ieee80211_sub_if_data *sdata)
4704{
4705 ieee80211_tx_result res;
4706 struct ieee80211_tx_data tx;
4707 struct sk_buff *check_skb;
4708
4709 memset(&tx, 0, sizeof(tx));
4710 tx.key = rcu_dereference(sdata->default_beacon_key);
4711 if (!tx.key)
4712 return 0;
4713 tx.local = local;
4714 tx.sdata = sdata;
4715 __skb_queue_head_init(&tx.skbs);
4716 __skb_queue_tail(&tx.skbs, skb);
4717 res = ieee80211_tx_h_encrypt(&tx);
4718 check_skb = __skb_dequeue(&tx.skbs);
4719
4720 WARN_ON(check_skb != skb);
4721 if (WARN_ON_ONCE(res != TX_CONTINUE))
4722 return -EINVAL;
4723
4724 return 0;
4725}
4726
4727static struct sk_buff *
4728__ieee80211_beacon_get(struct ieee80211_hw *hw,
4729 struct ieee80211_vif *vif,
4730 struct ieee80211_mutable_offsets *offs,
4731 bool is_template)
4732{
4733 struct ieee80211_local *local = hw_to_local(hw);
4734 struct beacon_data *beacon = NULL;
4735 struct sk_buff *skb = NULL;
4736 struct ieee80211_tx_info *info;
4737 struct ieee80211_sub_if_data *sdata = NULL;
4738 enum nl80211_band band;
4739 struct ieee80211_tx_rate_control txrc;
4740 struct ieee80211_chanctx_conf *chanctx_conf;
4741 int csa_off_base = 0;
4742
4743 rcu_read_lock();
4744
4745 sdata = vif_to_sdata(vif);
4746 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4747
4748 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
4749 goto out;
4750
4751 if (offs)
4752 memset(offs, 0, sizeof(*offs));
4753
4754 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4755 struct ieee80211_if_ap *ap = &sdata->u.ap;
4756
4757 beacon = rcu_dereference(ap->beacon);
4758 if (beacon) {
4759 if (beacon->cntdwn_counter_offsets[0]) {
4760 if (!is_template)
4761 ieee80211_beacon_update_cntdwn(vif);
4762
4763 ieee80211_set_beacon_cntdwn(sdata, beacon);
4764 }
4765
4766
4767
4768
4769
4770 skb = dev_alloc_skb(local->tx_headroom +
4771 beacon->head_len +
4772 beacon->tail_len + 256 +
4773 local->hw.extra_beacon_tailroom);
4774 if (!skb)
4775 goto out;
4776
4777 skb_reserve(skb, local->tx_headroom);
4778 skb_put_data(skb, beacon->head, beacon->head_len);
4779
4780 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4781 is_template);
4782
4783 if (offs) {
4784 offs->tim_offset = beacon->head_len;
4785 offs->tim_length = skb->len - beacon->head_len;
4786
4787
4788 csa_off_base = skb->len;
4789 }
4790
4791 if (beacon->tail)
4792 skb_put_data(skb, beacon->tail,
4793 beacon->tail_len);
4794
4795 if (ieee80211_beacon_protect(skb, local, sdata) < 0)
4796 goto out;
4797 } else
4798 goto out;
4799 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
4800 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4801 struct ieee80211_hdr *hdr;
4802
4803 beacon = rcu_dereference(ifibss->presp);
4804 if (!beacon)
4805 goto out;
4806
4807 if (beacon->cntdwn_counter_offsets[0]) {
4808 if (!is_template)
4809 __ieee80211_beacon_update_cntdwn(beacon);
4810
4811 ieee80211_set_beacon_cntdwn(sdata, beacon);
4812 }
4813
4814 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
4815 local->hw.extra_beacon_tailroom);
4816 if (!skb)
4817 goto out;
4818 skb_reserve(skb, local->tx_headroom);
4819 skb_put_data(skb, beacon->head, beacon->head_len);
4820
4821 hdr = (struct ieee80211_hdr *) skb->data;
4822 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4823 IEEE80211_STYPE_BEACON);
4824 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4825 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4826
4827 beacon = rcu_dereference(ifmsh->beacon);
4828 if (!beacon)
4829 goto out;
4830
4831 if (beacon->cntdwn_counter_offsets[0]) {
4832 if (!is_template)
4833
4834
4835
4836
4837
4838 __ieee80211_beacon_update_cntdwn(beacon);
4839
4840 ieee80211_set_beacon_cntdwn(sdata, beacon);
4841 }
4842
4843 if (ifmsh->sync_ops)
4844 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
4845
4846 skb = dev_alloc_skb(local->tx_headroom +
4847 beacon->head_len +
4848 256 +
4849 beacon->tail_len +
4850 local->hw.extra_beacon_tailroom);
4851 if (!skb)
4852 goto out;
4853 skb_reserve(skb, local->tx_headroom);
4854 skb_put_data(skb, beacon->head, beacon->head_len);
4855 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4856
4857 if (offs) {
4858 offs->tim_offset = beacon->head_len;
4859 offs->tim_length = skb->len - beacon->head_len;
4860 }
4861
4862 skb_put_data(skb, beacon->tail, beacon->tail_len);
4863 } else {
4864 WARN_ON(1);
4865 goto out;
4866 }
4867
4868
4869 if (offs && beacon) {
4870 int i;
4871
4872 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
4873 u16 csa_off = beacon->cntdwn_counter_offsets[i];
4874
4875 if (!csa_off)
4876 continue;
4877
4878 offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
4879 }
4880 }
4881
4882 band = chanctx_conf->def.chan->band;
4883
4884 info = IEEE80211_SKB_CB(skb);
4885
4886 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
4887 info->flags |= IEEE80211_TX_CTL_NO_ACK;
4888 info->band = band;
4889
4890 memset(&txrc, 0, sizeof(txrc));
4891 txrc.hw = hw;
4892 txrc.sband = local->hw.wiphy->bands[band];
4893 txrc.bss_conf = &sdata->vif.bss_conf;
4894 txrc.skb = skb;
4895 txrc.reported_rate.idx = -1;
4896 if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band])
4897 txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band];
4898 else
4899 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
4900 txrc.bss = true;
4901 rate_control_get_rate(sdata, NULL, &txrc);
4902
4903 info->control.vif = vif;
4904
4905 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4906 IEEE80211_TX_CTL_ASSIGN_SEQ |
4907 IEEE80211_TX_CTL_FIRST_FRAGMENT;
4908 out:
4909 rcu_read_unlock();
4910 return skb;
4911
4912}
4913
4914struct sk_buff *
4915ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4916 struct ieee80211_vif *vif,
4917 struct ieee80211_mutable_offsets *offs)
4918{
4919 return __ieee80211_beacon_get(hw, vif, offs, true);
4920}
4921EXPORT_SYMBOL(ieee80211_beacon_get_template);
4922
4923struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4924 struct ieee80211_vif *vif,
4925 u16 *tim_offset, u16 *tim_length)
4926{
4927 struct ieee80211_mutable_offsets offs = {};
4928 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
4929 struct sk_buff *copy;
4930 struct ieee80211_supported_band *sband;
4931 int shift;
4932
4933 if (!bcn)
4934 return bcn;
4935
4936 if (tim_offset)
4937 *tim_offset = offs.tim_offset;
4938
4939 if (tim_length)
4940 *tim_length = offs.tim_length;
4941
4942 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4943 !hw_to_local(hw)->monitors)
4944 return bcn;
4945
4946
4947 copy = skb_copy(bcn, GFP_ATOMIC);
4948 if (!copy)
4949 return bcn;
4950
4951 shift = ieee80211_vif_get_shift(vif);
4952 sband = ieee80211_get_sband(vif_to_sdata(vif));
4953 if (!sband)
4954 return bcn;
4955
4956 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false,
4957 NULL);
4958
4959 return bcn;
4960}
4961EXPORT_SYMBOL(ieee80211_beacon_get_tim);
4962
4963struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4964 struct ieee80211_vif *vif)
4965{
4966 struct ieee80211_if_ap *ap = NULL;
4967 struct sk_buff *skb = NULL;
4968 struct probe_resp *presp = NULL;
4969 struct ieee80211_hdr *hdr;
4970 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4971
4972 if (sdata->vif.type != NL80211_IFTYPE_AP)
4973 return NULL;
4974
4975 rcu_read_lock();
4976
4977 ap = &sdata->u.ap;
4978 presp = rcu_dereference(ap->probe_resp);
4979 if (!presp)
4980 goto out;
4981
4982 skb = dev_alloc_skb(presp->len);
4983 if (!skb)
4984 goto out;
4985
4986 skb_put_data(skb, presp->data, presp->len);
4987
4988 hdr = (struct ieee80211_hdr *) skb->data;
4989 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4990
4991out:
4992 rcu_read_unlock();
4993 return skb;
4994}
4995EXPORT_SYMBOL(ieee80211_proberesp_get);
4996
4997struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
4998 struct ieee80211_vif *vif)
4999{
5000 struct sk_buff *skb = NULL;
5001 struct fils_discovery_data *tmpl = NULL;
5002 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5003
5004 if (sdata->vif.type != NL80211_IFTYPE_AP)
5005 return NULL;
5006
5007 rcu_read_lock();
5008 tmpl = rcu_dereference(sdata->u.ap.fils_discovery);
5009 if (!tmpl) {
5010 rcu_read_unlock();
5011 return NULL;
5012 }
5013
5014 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5015 if (skb) {
5016 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5017 skb_put_data(skb, tmpl->data, tmpl->len);
5018 }
5019
5020 rcu_read_unlock();
5021 return skb;
5022}
5023EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
5024
5025struct sk_buff *
5026ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
5027 struct ieee80211_vif *vif)
5028{
5029 struct sk_buff *skb = NULL;
5030 struct unsol_bcast_probe_resp_data *tmpl = NULL;
5031 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5032
5033 if (sdata->vif.type != NL80211_IFTYPE_AP)
5034 return NULL;
5035
5036 rcu_read_lock();
5037 tmpl = rcu_dereference(sdata->u.ap.unsol_bcast_probe_resp);
5038 if (!tmpl) {
5039 rcu_read_unlock();
5040 return NULL;
5041 }
5042
5043 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5044 if (skb) {
5045 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5046 skb_put_data(skb, tmpl->data, tmpl->len);
5047 }
5048
5049 rcu_read_unlock();
5050 return skb;
5051}
5052EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl);
5053
5054struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
5055 struct ieee80211_vif *vif)
5056{
5057 struct ieee80211_sub_if_data *sdata;
5058 struct ieee80211_if_managed *ifmgd;
5059 struct ieee80211_pspoll *pspoll;
5060 struct ieee80211_local *local;
5061 struct sk_buff *skb;
5062
5063 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5064 return NULL;
5065
5066 sdata = vif_to_sdata(vif);
5067 ifmgd = &sdata->u.mgd;
5068 local = sdata->local;
5069
5070 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
5071 if (!skb)
5072 return NULL;
5073
5074 skb_reserve(skb, local->hw.extra_tx_headroom);
5075
5076 pspoll = skb_put_zero(skb, sizeof(*pspoll));
5077 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
5078 IEEE80211_STYPE_PSPOLL);
5079 pspoll->aid = cpu_to_le16(sdata->vif.bss_conf.aid);
5080
5081
5082 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
5083
5084 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
5085 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
5086
5087 return skb;
5088}
5089EXPORT_SYMBOL(ieee80211_pspoll_get);
5090
5091struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
5092 struct ieee80211_vif *vif,
5093 bool qos_ok)
5094{
5095 struct ieee80211_hdr_3addr *nullfunc;
5096 struct ieee80211_sub_if_data *sdata;
5097 struct ieee80211_if_managed *ifmgd;
5098 struct ieee80211_local *local;
5099 struct sk_buff *skb;
5100 bool qos = false;
5101
5102 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5103 return NULL;
5104
5105 sdata = vif_to_sdata(vif);
5106 ifmgd = &sdata->u.mgd;
5107 local = sdata->local;
5108
5109 if (qos_ok) {
5110 struct sta_info *sta;
5111
5112 rcu_read_lock();
5113 sta = sta_info_get(sdata, ifmgd->bssid);
5114 qos = sta && sta->sta.wme;
5115 rcu_read_unlock();
5116 }
5117
5118 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5119 sizeof(*nullfunc) + 2);
5120 if (!skb)
5121 return NULL;
5122
5123 skb_reserve(skb, local->hw.extra_tx_headroom);
5124
5125 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
5126 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
5127 IEEE80211_STYPE_NULLFUNC |
5128 IEEE80211_FCTL_TODS);
5129 if (qos) {
5130 __le16 qoshdr = cpu_to_le16(7);
5131
5132 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
5133 IEEE80211_STYPE_NULLFUNC) !=
5134 IEEE80211_STYPE_QOS_NULLFUNC);
5135 nullfunc->frame_control |=
5136 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
5137 skb->priority = 7;
5138 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
5139 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
5140 }
5141
5142 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
5143 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
5144 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
5145
5146 return skb;
5147}
5148EXPORT_SYMBOL(ieee80211_nullfunc_get);
5149
5150struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
5151 const u8 *src_addr,
5152 const u8 *ssid, size_t ssid_len,
5153 size_t tailroom)
5154{
5155 struct ieee80211_local *local = hw_to_local(hw);
5156 struct ieee80211_hdr_3addr *hdr;
5157 struct sk_buff *skb;
5158 size_t ie_ssid_len;
5159 u8 *pos;
5160
5161 ie_ssid_len = 2 + ssid_len;
5162
5163 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
5164 ie_ssid_len + tailroom);
5165 if (!skb)
5166 return NULL;
5167
5168 skb_reserve(skb, local->hw.extra_tx_headroom);
5169
5170 hdr = skb_put_zero(skb, sizeof(*hdr));
5171 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5172 IEEE80211_STYPE_PROBE_REQ);
5173 eth_broadcast_addr(hdr->addr1);
5174 memcpy(hdr->addr2, src_addr, ETH_ALEN);
5175 eth_broadcast_addr(hdr->addr3);
5176
5177 pos = skb_put(skb, ie_ssid_len);
5178 *pos++ = WLAN_EID_SSID;
5179 *pos++ = ssid_len;
5180 if (ssid_len)
5181 memcpy(pos, ssid, ssid_len);
5182 pos += ssid_len;
5183
5184 return skb;
5185}
5186EXPORT_SYMBOL(ieee80211_probereq_get);
5187
5188void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5189 const void *frame, size_t frame_len,
5190 const struct ieee80211_tx_info *frame_txctl,
5191 struct ieee80211_rts *rts)
5192{
5193 const struct ieee80211_hdr *hdr = frame;
5194
5195 rts->frame_control =
5196 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
5197 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
5198 frame_txctl);
5199 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
5200 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
5201}
5202EXPORT_SYMBOL(ieee80211_rts_get);
5203
5204void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5205 const void *frame, size_t frame_len,
5206 const struct ieee80211_tx_info *frame_txctl,
5207 struct ieee80211_cts *cts)
5208{
5209 const struct ieee80211_hdr *hdr = frame;
5210
5211 cts->frame_control =
5212 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
5213 cts->duration = ieee80211_ctstoself_duration(hw, vif,
5214 frame_len, frame_txctl);
5215 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
5216}
5217EXPORT_SYMBOL(ieee80211_ctstoself_get);
5218
5219struct sk_buff *
5220ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
5221 struct ieee80211_vif *vif)
5222{
5223 struct ieee80211_local *local = hw_to_local(hw);
5224 struct sk_buff *skb = NULL;
5225 struct ieee80211_tx_data tx;
5226 struct ieee80211_sub_if_data *sdata;
5227 struct ps_data *ps;
5228 struct ieee80211_tx_info *info;
5229 struct ieee80211_chanctx_conf *chanctx_conf;
5230
5231 sdata = vif_to_sdata(vif);
5232
5233 rcu_read_lock();
5234 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5235
5236 if (!chanctx_conf)
5237 goto out;
5238
5239 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5240 struct beacon_data *beacon =
5241 rcu_dereference(sdata->u.ap.beacon);
5242
5243 if (!beacon || !beacon->head)
5244 goto out;
5245
5246 ps = &sdata->u.ap.ps;
5247 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5248 ps = &sdata->u.mesh.ps;
5249 } else {
5250 goto out;
5251 }
5252
5253 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
5254 goto out;
5255
5256 while (1) {
5257 skb = skb_dequeue(&ps->bc_buf);
5258 if (!skb)
5259 goto out;
5260 local->total_ps_buffered--;
5261
5262 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
5263 struct ieee80211_hdr *hdr =
5264 (struct ieee80211_hdr *) skb->data;
5265
5266
5267
5268 hdr->frame_control |=
5269 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5270 }
5271
5272 if (sdata->vif.type == NL80211_IFTYPE_AP)
5273 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
5274 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
5275 break;
5276 ieee80211_free_txskb(hw, skb);
5277 }
5278
5279 info = IEEE80211_SKB_CB(skb);
5280
5281 tx.flags |= IEEE80211_TX_PS_BUFFERED;
5282 info->band = chanctx_conf->def.chan->band;
5283
5284 if (invoke_tx_handlers(&tx))
5285 skb = NULL;
5286 out:
5287 rcu_read_unlock();
5288
5289 return skb;
5290}
5291EXPORT_SYMBOL(ieee80211_get_buffered_bc);
5292
5293int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5294{
5295 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5296 struct ieee80211_sub_if_data *sdata = sta->sdata;
5297 struct ieee80211_local *local = sdata->local;
5298 int ret;
5299 u32 queues;
5300
5301 lockdep_assert_held(&local->sta_mtx);
5302
5303
5304 switch (sdata->vif.type) {
5305 case NL80211_IFTYPE_STATION:
5306 case NL80211_IFTYPE_AP:
5307 case NL80211_IFTYPE_AP_VLAN:
5308 break;
5309 default:
5310 WARN_ON(1);
5311 return -EINVAL;
5312 }
5313
5314 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5315 return -EINVAL;
5316
5317 if (sta->reserved_tid == tid) {
5318 ret = 0;
5319 goto out;
5320 }
5321
5322 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5323 sdata_err(sdata, "TID reservation already active\n");
5324 ret = -EALREADY;
5325 goto out;
5326 }
5327
5328 ieee80211_stop_vif_queues(sdata->local, sdata,
5329 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5330
5331 synchronize_net();
5332
5333
5334 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
5335 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
5336 __ieee80211_stop_tx_ba_session(sta, tid,
5337 AGG_STOP_LOCAL_REQUEST);
5338 }
5339
5340 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
5341 __ieee80211_flush_queues(local, sdata, queues, false);
5342
5343 sta->reserved_tid = tid;
5344
5345 ieee80211_wake_vif_queues(local, sdata,
5346 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5347
5348 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
5349 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
5350
5351 ret = 0;
5352 out:
5353 return ret;
5354}
5355EXPORT_SYMBOL(ieee80211_reserve_tid);
5356
5357void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5358{
5359 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5360 struct ieee80211_sub_if_data *sdata = sta->sdata;
5361
5362 lockdep_assert_held(&sdata->local->sta_mtx);
5363
5364
5365 switch (sdata->vif.type) {
5366 case NL80211_IFTYPE_STATION:
5367 case NL80211_IFTYPE_AP:
5368 case NL80211_IFTYPE_AP_VLAN:
5369 break;
5370 default:
5371 WARN_ON(1);
5372 return;
5373 }
5374
5375 if (tid != sta->reserved_tid) {
5376 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
5377 return;
5378 }
5379
5380 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
5381}
5382EXPORT_SYMBOL(ieee80211_unreserve_tid);
5383
5384void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
5385 struct sk_buff *skb, int tid,
5386 enum nl80211_band band)
5387{
5388 int ac = ieee80211_ac_from_tid(tid);
5389
5390 skb_reset_mac_header(skb);
5391 skb_set_queue_mapping(skb, ac);
5392 skb->priority = tid;
5393
5394 skb->dev = sdata->dev;
5395
5396
5397
5398
5399
5400
5401 local_bh_disable();
5402 IEEE80211_SKB_CB(skb)->band = band;
5403 ieee80211_xmit(sdata, NULL, skb);
5404 local_bh_enable();
5405}
5406
5407int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
5408 const u8 *buf, size_t len,
5409 const u8 *dest, __be16 proto, bool unencrypted,
5410 u64 *cookie)
5411{
5412 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5413 struct ieee80211_local *local = sdata->local;
5414 struct sta_info *sta;
5415 struct sk_buff *skb;
5416 struct ethhdr *ehdr;
5417 u32 ctrl_flags = 0;
5418 u32 flags = 0;
5419
5420
5421
5422
5423 if (proto != sdata->control_port_protocol &&
5424 proto != cpu_to_be16(ETH_P_PREAUTH))
5425 return -EINVAL;
5426
5427 if (proto == sdata->control_port_protocol)
5428 ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
5429 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
5430
5431 if (unencrypted)
5432 flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5433
5434 if (cookie)
5435 ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
5436
5437 flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX;
5438
5439 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5440 sizeof(struct ethhdr) + len);
5441 if (!skb)
5442 return -ENOMEM;
5443
5444 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
5445
5446 skb_put_data(skb, buf, len);
5447
5448 ehdr = skb_push(skb, sizeof(struct ethhdr));
5449 memcpy(ehdr->h_dest, dest, ETH_ALEN);
5450 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
5451 ehdr->h_proto = proto;
5452
5453 skb->dev = dev;
5454 skb->protocol = proto;
5455 skb_reset_network_header(skb);
5456 skb_reset_mac_header(skb);
5457
5458
5459
5460
5461
5462 rcu_read_lock();
5463
5464 if (ieee80211_lookup_ra_sta(sdata, skb, &sta) == 0 && !IS_ERR(sta)) {
5465 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
5466
5467 skb_set_queue_mapping(skb, queue);
5468 skb_get_hash(skb);
5469 }
5470
5471 rcu_read_unlock();
5472
5473
5474 mutex_lock(&local->mtx);
5475
5476 local_bh_disable();
5477 __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags, cookie);
5478 local_bh_enable();
5479
5480 mutex_unlock(&local->mtx);
5481
5482 return 0;
5483}
5484
5485int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
5486 const u8 *buf, size_t len)
5487{
5488 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5489 struct ieee80211_local *local = sdata->local;
5490 struct sk_buff *skb;
5491
5492 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
5493 30 +
5494 18);
5495 if (!skb)
5496 return -ENOMEM;
5497
5498 skb_reserve(skb, local->hw.extra_tx_headroom);
5499 skb_put_data(skb, buf, len);
5500
5501 skb->dev = dev;
5502 skb->protocol = htons(ETH_P_802_3);
5503 skb_reset_network_header(skb);
5504 skb_reset_mac_header(skb);
5505
5506 local_bh_disable();
5507 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
5508 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP,
5509 NULL);
5510 local_bh_enable();
5511
5512 return 0;
5513}
5514